NANO BUBBLE AND HYDROXYL RADICAL GENERATOR (NBHRG) AND PROCESSING SYSTEM TO DECONTAMINATE WATER WITHOUT CHEMICALS USING NBHRG

Abstract

[Summary]

This invention is about Nano Bubble and Hydroxyl Radical Generator and has the following detail features; Air inlet part; Inlet pipe for inflowing liquid connected to the above air inlet part; Pump connected to the above inlet pipe; Drive motor connected to the above pump; Rotating blade connected to drive axis of the above drive motor; Fixed blade connected to inside wall of the above pump, and arranged between the above rotating blade; The above rotating blade, the fixed blade or cylindrical blade surfaces of both blades are slanted in a direction.

Therefore, this invention proposes Nano Bubble and Hydroxyl Radical Generator which increases dissolving rate of gas by accelerating finization and mix of air and liquid through inducing turbulence of air and liquid by way of constructing slant on surfaces of each blade.

Claims

1-7. (canceled)

8. A Nano Bubble and Hydroxyl Radical Generator (NBHRG), comprising: a pump accommodating liquid flow in and flow out through a pump inlet coupled to a pump outlet; a drive motor connected to a side of the pump; rotating blades installed in the drive motor and constructed with a lamination of several blades of large teeth and small teeth; fixed blades installed in an inside wall of the pump and constructed with a lamination of several blades of large teeth and small teeth conjoined by insertion at a certain distance corresponding to large teeth and small teeth of the rotating blades; multiple impellers installed in a rotation axis of the drive motor, and placed at the pump inlet located prior to the rotating blades and fixed blades; multiple chambers positioned between the multiple impellers to transport liquid through the pump which is propelled by rotation of the multiple impellers; a gas generator that supplies at least one gas to the pump inlet; a liquid recirculation pipe that resupplies liquid flowing from the pump outlet to the pump inlet and connects the pump inlet to the pump outlet; at least one side of cylindrical surfaces of the rotating blades and the fixed blades are slanted, wherein the slant of cylindrical surface of each of the rotating blade is comprised of a first slanted part in which its surface is slanted against rotation direction of the rotating blade so that it is higher in rotation direction and lower on an opposite side of rotation direction, and the slant of cylindrical surface of each of the fixed blade is comprised of a second slanted part in which its surface is slanted against the slant direction of cylindrical surface of the rotating blade so that it is relatively lower on the opposite side of the surface of the first slanted part and higher on its other side, wherein an eddy booster is formed such that the rotating blade, the fixed blade, and the blade sides of both blades are slanted against a reference radius line.

9. The Nano Bubble and Hydroxyl Radical Generator (NBHRG) of claim 8, further comprising: an air inlet connected to the liquid recirculation pipe, wherein the connection part connects the air inlet and the liquid recirculation pipe using a venturi tube having a bottleneck part and an expansion part.

10. The Nano Bubble and Hydroxyl Radical Generator (NBHRG) of claim 8, wherein the gas generator comprises at least one of an oxygen generator or an ozone generator.

11. The Nano Bubble and Hydroxyl Radical Generator (NBHRG) of claim 8, further comprising: a bulkhead installed at the outlet of the pump to accelerate production of the nano bubbles by inducing a pressure change in the liquid exiting the outlet; wherein the bulkhead comprises a bulkhead structure placed in the outlet having multiple small diameter partitions at the bulkhead, and an expanded large partition that is connected to the small diameter partitions.

12. The Nano Bubble and Hydroxyl Radical Generator (NBHRG) of claim 11, further comprising multiple bulkheads separated from each other to form a space there between.

13. The Nano Bubble and Hydroxyl Radical Generator (NBHRG) of claim 10, wherein the generated nano bubbles infused with ozone or oxygen is used to treat water in a water treatment system, and further comprises: multiple ones of water tanks connected and arranged in a linear row, wherein each water tank is divided by partitions having holes to transport and/or discharge processed water from the each water tank; wherein each of the water tanks comprises a processing compartment for inflowing water and a storage compartment for processed water; and a transfer pipe connected to the pump outlet and a collection pipe connected to the pump inlet, wherein the processing compartment receives inflowing water with nano bubbles from the transfer pipe and the collection pipe collects processed water outflowing from the storage compartment; the processing compartment of a front-line water tank including a pipe is connected through a water inlet to supply original contaminated water to the front-line water tank to flow from one water tank to a next water tank in the row; wherein the processing compartment for inflowing water and the storage compartment for processed water are constructed so that processed water can flow from the processing compartment to the storage compartment through a hole in the partition that divides the two compartments; a stopping plate causing produced nano bubbles to collide located between the hole in the partition and the end of the transfer pipe installed in the processing compartment; and a discharge outlet at a final water tank for discharging treated water from the treatment system.

14. The Nano Bubble and Hydroxyl Radical Generator (NBHRG) of claim 13, further comprising a conveyor possessing multiple transfer plates to filter out sludge and contaminants in original contaminated water or inflowing water, which is installed at the upper portion of the processing compartment for inflowing water.

15. A method for producing nano bubbles with hydroxyl radicals, comprising the steps of: forcing a liquid flow in and flow out through a pump inlet coupled to a pump outlet of a liquid pump; mixing the liquid flow with rotating blades comprising the pump constructed with a lamination of several blades of large teeth and small teeth; installing fixed blades on an interior wall of the pump constructed with a lamination of several blades of large teeth and small teeth conjoined by insertion at a certain distance corresponding to large teeth and small teeth of the rotating blades; rotating multiple impellers installed in a rotation axis of a drive motor of the pump, and placed at the pump inlet positioned prior to the rotating blades and fixed blades; positioning multiple chambers between the multiple impellers to transport liquid through the pump and propelled by rotation of the multiple impellers; supplying at least one gas from a gas generator to the pump inlet to introduce to the liquid flow under pressure; resupplying liquid flowing from the pump outlet to the pump inlet with a liquid recirculation pipe connecting the pump inlet to the pump outlet; slanting at least one side of a cylindrical surface of the rotating blades and the fixed blades, wherein the slant of the cylindrical surface of each of the rotating blades is comprised of a first slanted part in which its surface is slanted against rotation direction of the rotating blade so that it is higher in rotation direction and lower on an opposite side of rotation direction, and the slant of the cylindrical surface of each of the fixed blades is comprised of a second slanted part in which its surface is slanted against the slant direction of cylindrical surface of the rotating blade so that it is relatively lower on the opposite side of the surface of the first slanted part and higher on its other side, wherein an eddy booster is formed such that the rotating blade, the fixed blade, and the blade sides of both blades are slanted against a reference radius line.

16. The method for producing nano bubbles with hydroxyl radicals of claim 15, further comprising the steps of: mixing the liquid under pressure so as to produce cavitation and produce nano bubbles containing ozone gas; wherein the ozone gas in the nano bubbles reacts with the liquid to produce hydroxyl radicals.

17. The method for producing nano bubbles with hydroxyl radicals of claim 16, further comprising the step of exposing a target material to the hydroxyl radical containing liquid to thereby treat the target material by destroying or neutralizing a contaminant in the target material.

18. The method for producing nano bubbles with hydroxyl radicals of claim 17, wherein the liquid and the target material comprise water.

19. A nano bubble generating system, comprising: a nano bubble generator comprising a set of interlacing small teeth and large teeth, wherein the small teeth and large teeth are repeatedly rotated and arranged at high speed to propel and pressurize a liquid flowing into and through the system; a gas generator selectively infusing generated oxygen into the liquid, or into an ozone generator, or into both the liquid and the ozone generator; the ozone generator selectively infusing generated ozone into the liquid; the nano bubble generator rotating the liquid under pressure within the interlaced small teeth and large teeth at sufficiently high enough speed to cause internal pressure cavitation and vitalize the liquid with nano bubbles comprised of infused oxygen and/or ozone; and ejecting the nano bubble infused liquid from the nano bubble generator.

20. The nano bubble generating system of claim 19, further comprising: a pump propelling a liquid flow through a pump inlet coupled to a pump outlet; rotating blades coupled to a drive motor and constructed with a lamination of several blades of the large teeth and the small teeth; fixed blades installed along an inner wall of the pump and constructed with a lamination of several blades of the large teeth and the small teeth conjoined by insertion at a certain distance corresponding to the large teeth and the small teeth of the rotating blades; multiple impellers installed in a rotation axis to propel liquid through the pump, and placed proximate to the pump inlet prior to the rotating blades and the fixed blades; and multiple chambers positioned between the multiple impellers to transport liquid through the pump, the liquid propelled by the multiple impellers to pass into and out of the multiple chambers.

21. The nano bubble generating system of claim 19, further comprising: a pump propelling the rotating liquid cavitating under pressure, the cavitating caused by the interlaced rotating blades and fixed blades; and wherein at least one side of a formed cylindrical surface of each of the rotating blades and of the fixed blades are slanted.

22. The nano bubble generating system of claim 21, wherein the slant of cylindrical surface of each of the rotating blades is comprised of a first slanted part in which its surface is slanted against rotation direction of the rotating blade so that it is higher in rotation direction and lower on an opposite side of rotation direction, and the slant of cylindrical surface of each of the fixed blades is comprised of a second slanted part in which its surface is slanted against the slant direction of the cylindrical surface of each of the rotating blades so that it is relatively lower on the opposite side of the surface of the first slanted part and higher on its other side, wherein an eddy booster is formed such that the rotating blade, the fixed blade, and the blade sides of both blades are slanted against a reference radius line.

23. The nano bubble generating system of claim 20, further comprising: a bulkhead installed at the pump outlet to enhance production of the nano bubbles by inducing a pressure change in the liquid exiting the pump outlet; wherein the bulkhead comprises a bulkhead structure placed in the pump outlet having multiple small diameter partitions at the bulkhead, and an expanded large partition that is connected to the small diameter partitions.

24. The nano bubble generating system of claim 23, further comprising multiple bulkheads separated from each other to form a space there between.

25. The nano bubble generating system of claim 19, wherein the nano bubbles produced contain ozone gas, wherein the ozone gas undergoes a chemical reaction with the liquid to produce hydroxyl radicals.

26. The nano bubble generating system of claim 25, wherein the liquid comprises water.

27. The nano bubble generating system of claim 25, wherein the generated nano bubbles and hydroxyl radicals are used to treat water in a water treatment system, and further comprises: multiple ones of water tanks connected and arranged in a linear row, wherein each water tank is divided by partitions having have holes to transport and/or discharge processed water from the each water tank; wherein each of the water tanks comprises a processing compartment for inflowing water and a storage compartment for processed water, wherein water flows from the processing compartment to the storage compartment; and a transfer pipe connected to the pump outlet and a collection pipe connected to the pump inlet, wherein the processing compartment receives inflowing water with nano bubbles from the transfer pipe and the collection pipe collects processed water outflowing from the storage compartment; the processing compartment of a front-line water tank including a pipe is connected through a water inlet to supply original contaminated water to the front-line water tank to flow from the water tank to a next water tank in the row; wherein the processing compartment for inflowing water and the storage compartment for processed water are constructed so that processed water can flow from the processing compartment to the storage compartment through a hole in the partition that divides the two compartments; a stopping plate causing produced nano bubbles to collide and which is located between the hole in the partition and the end of the transfer pipe installed in the processing compartment; and a discharge outlet at a final water tank for discharging treated water from the treatment system.

28. The nano bubble generating system of claim 27, further comprising a conveyor possessing multiple transfer plates to filter out sludge and contaminants in original contaminated water or inflowing water, which is installed at the upper portion of the processing compartment for inflowing water.

Description

DETAILS TO IMPLEMENT INVENTION

[0068] Details of NBHRG of this invention will be explained in following while referring to diagrams.

[0069] The NBHRG of this invention can be used to improve water quality by increasing supply of dissolved oxygen to small lakes and water hazards in golf courses, other reservoirs, contaminated water treatment plants, fish tanks, and fish farms by producing nano bubbles and hydroxyl radicals through selective finezation and mix of liquid and gases (previously stated as air) such as air, oxygen, and ozone. The NBHRG of this invention can be used for food sterilization, deodorization, washing system, and skin care. For reference, hydroxyl (OH) radical is an oxygen anionic matter produced in plasma state. It is a radical of hydroxyl anion (OH) and is powerful in sterilization, disinfection, deodorization and decomposition due to its strong oxidizing power, but is not harmful to human body because it is reduced to oxygen and water after reacting with contaminants. Its sterilizing rate is 2000 times faster than ozone and 180 times faster than UV. And it reacts with almost all of contaminants in air and water so that it deodorizes and decomposes.

[0070] Diagrams 1 to 6 show the first implementation example of NBHRG of this invention. Basically the NBHRG (1) has following installations: [0071] A pump that has built-in double impellers (370) and blades (330, 340); [0072] A drive motor (320), which is installed at a side of the pump, for impellers (370) and blades (330, 340); [0073] An inlet pipe (200) that is connected to inlet part of the pump (300) to supply various kinds of contaminated waters and circulating liquids such as processed water; [0074] An outlet pipe (400) connected to outlet part of the pump (300) corresponding to the inlet pipe; [0075] An air inlet (100) installed at inlet part of the pump (300) to supply gases such as air, ozone (O.sub.3), oxygen, hydrogen, and nitrogen extracted from air from outside of the pump to inside; [0076] A recirculation pipe (600) to resupply discharged liquid from the outlet pipe (400) to the inlet part of the pump by connecting inlet pipe (200) to outlet (400) pipe.

[0077] Air intake part (100) may be directly connected to the inlet pipe (200), but is connected to a side of the recirculation pipe (600) entering into the inlet pipe (200) as in Diagram 1 so that gases such as outside air, oxygen and ozone can be selectively mixed with contaminated liquid and processed liquid that are supplied through the inlet pipe (200).

[0078] For which, although not seen in the Diagram, the air intake part (100) can selectively include an oxygen generator that produces oxygen from outside air, an ozone generator that produces ozone by combining oxygen from oxygen generator with outside air, or a prescribed means of air intake to supply gases such as hydrogen or nitrogen selectively. And the air intake part (100) may have a flow rate controller in the middle of air intake pipe (120) to control flow rate of gases such as air, oxygen, or ozone when they enter into recirculation pipe (600) or the inlet pipe (200) through air intake pipe (120).

[0079] The recirculation pipe (600) is installed to actualize more perfect mix and finization of liquid by recycling previously mixed and refined liquid in the pump (300) to inside of the pump (300) once more.

[0080] For more perfect mix and refinement the recirculation pipe (600) is connected to each joint (J) of the inlet pipe (200) and the outlet pipe (400) of the pump so that at least a portion of discharged liquid from the outlet pipe (400) can be recycled by bringing it back to the inlet pipe (200).

[0081] Meanwhile the joining part of the air intake pipe (120) and the recirculation pipe (600) is connected by venturi tube in shape of cross valve (700). Gases such as air, oxygen, and ozone supplied through the air intake pipe (120) are mixed with discharged liquid transported through the recirculation pipe (600) when they pass through bottleneck portion of the venturi tube (700). At this time discharged liquid naturally absorbs gases transported through the air intake pipe (120) by sudden drop of the pressure of discharged liquid and great increase of flow rate.

[0082] If the venturi tube is introduced as mentioned above, gases such as air, oxygen and ozone flowing through the air intake pipe (120) are smoothly absorbed into and mixed with liquid by sudden changes of pressure and flow rate of the discharged liquid according to Bernoullis Principle. So this system has merit of cost effectiveness such as great decrease of energy consumption because it does not need separate power source for the above process. In addition the recirculation of the discharged liquid through the recirculation pipe (600) can be controlled to be conducted more than once as needed so that reliability of the equipment is strongly consolidated because it produces more perfect nano bubbles.

[0083] As stated above the inlet (200) and outlet (400) pipes of the pump are connected to the recirculation pipe (600) with each joint (J) as the center, and the inlet (200) and outlet (400) pipes may have their own on-off valves (210) (410) to control flow rate of supplied and discharged liquids and to open or shut liquid path.

[0084] The NBHRG (1) in this invention produces nano bubbles by cavitation which is caused by striking contaminated liquid, processed liquid or gases such as air, oxygen, and ozone, which are supplied by the inlet pipe (200), with multiple blades (330, 340). In order for this the following devices are installed in the pump (300): [0085] Double impeller (370) that are rotated by drive of motor axis (360); blade (340) fixed at the inside wall (311) of pump housing (310); blade that rotates around the motor axis (360) and induces rotation of the fixed blade (340)

[0086] It is desirable that the impeller (370) be installed near inlet side of the pump (300), and the rotating blade (330) and the fixed blade (340) are installed upward and after the impeller (370), and the pathway of the liquid and gas from the inlet side of the pump (300). It is more desirable that the impeller (370) and the rotating blade (330) be combined as one on the motor axis (360). It is also desirable that at least more than one chamber (388), through which liquids (contaminated or processed) and outside air or gases such as oxygen and ozone which are transported by rotation of the impeller (370) pass, be arranged between each impeller (370) installed inside of the pump (300).

[0087] In this structure of multiple pumps the impeller (370) and the chamber (380) are arranged alternately and repeatedly, where the impeller (370) is rotated by drive of motor axis, and by that rotating power mixed liquid of water, air, oxygen and ozone is forcefully transported from the inlet side of the pump to the blades (330, 340) placed at the top of the impeller. And dissolved rate of gases in water is more increased during this process while mixed liquid of water, air, oxygen, and ozone passes through double impellers (370) and double chambers (380) after the impellers.

[0088] Nano bubbles are produced in mixed liquid of water and gases, that was transported to the blades, (330, 340) by interaction, i.e. relative rotation, between the rotating blade and the fixed blade, and then discharged to outlet side of the pump along water path (316) from outlet (315) placed on top of pump housing (310).

[0089] The unexplained number 349 shown as an example in Diagram 2 is fixing bolt, which fixates the fixed blade (340) to the inside wall (311) of pump housing (310). The rotating blade (330) and the fixed blade (340) are lamination in several layers with blades of prescribed thickness, and form several small teeth (333) (343) and several large teeth (335) (345), which are protruded between the several small teeth (333) (343) with set length, at corresponding surface of opposite rotating blade and fixed blade. It is desirable that tips of large teeth (335)(345) and small teeth (333)(343) be comprised in form of sharp knife (cc Diagram 3). In addition, only one large teeth (335)(345) of rotating blade (330) and fixed blade (340) is placed at lower part, where liquid is introduced, and double large teeth can be placed in a layer at upper part.

[0090] Since mixed liquid, in which nano bubble is not produced yet, is introduced at lower part, the initial nano bubbles, although the amount is little, are produced by striking liquid with only one large teeth. Water and gases mix more smoothly and more refined nano bubbles are produced at upper part, where liquid is discharged, by striking second time with large teeth of lamination blades in several layer.

[0091] As seen in Diagram 2 large teeth (335)(345) of rotating blade and fixed blade should be inserted into each other more than 0.5 times of the length of the blade. By installing like this the large teeth (335)(345) of each blade is inserted as deep as possible so that the length of water path is extended. By which contact surface of each blade and liquid is increased so that much more mixed liquid can be hit. This in turn makes it possible for liquid and gas to get mixed and finized more smoothly.

[0092] The rotating blade (330) and the fixed blade (340) in the above structure make their large teeth (335)9345) inserted alternately. And it is good that a certain width of gap be created between opposite large teeth (3350(345) and small teeth (343)(333) so that mixed liquid from impeller (370) can pass through (cc Diagram 2 or 4).

[0093] In detail, the large teeth (335) of the rotating blade (330) are inserted between the large teeth (345) of the fixed blade (340) while maintaining the above gap for liquid path. In opposite of this, the large teeth (345) of the fixed blade (340) are inserted between the large teeth (335) of the rotating blade (330) while maintaining the above gap for liquid path.

[0094] When the motor operates in this structure, the rotating blade (330) installed on motor axis (360) rotates in such a way that the small teeth (333) and the large teeth (335) of the rotating blade (330) rotates between the large teeth (345) and small teeth (343) of the fixed blade (340), respectively so that relative rotation is created between the large (335) (343) and the small (343)(333) teeth of the rotating (330) and the fixed (340) blades.

[0095] When the mixed liquid is introduced to the gap between the rotating blade (330) and the fixed blade (340), it splits into fine size while being mixed by relative rotation produced by the large teeth (335)(345) and the small teeth (343)(333). If the rotating blade (330) is rotated at certain high speed, the mixed liquid split into less than 5 m sized bubbles while being mixed so that dissolved rate in liquid is increased further.

[0096] Especially, in NBHRG of this invention cylindrical surface of the rotating blade (330) and/or the fixed blade (340) should be slanted at least one direction for smooth production of nano sized microbubble (seq. nano bubble) (cc Diagram 4). In order for this the rotating blade (330) can be comprised of the first slanted part where the slant (a) of cylindrical surface of each blade is formed against rotation direction of the rotating blade (330). In detail, the slant direction of the first slanted part (331) is higher in rotation direction and lower in the opposite side if the rotation direction of the rotating blade (330) is counterclockwise (cc Diagram 4a). In response to this, the second slanted part (341) can be formed selectively in such a way that cylindrical surface of each blade of the fixed blade (340) is formed against the first slanted part (331) of the slant (a) of rotating blade (330), that is, against rotation direction of the rotating blade (330). In this case the second slanted part (341) is formed in such a way that the slant direction is lower at the opposite side of the first slanted part (331) and higher at the other side (cc Diagram 4b).

[0097] Therefore, when the rotating blade (330) rotates, the first slanted part (331) approaches to the second slanted part (341) and comes to face each other at upper dead point of each slant. As rotation continues, space between cylindrical surface, which is formed when each blade faces each other, widens. This in turn maximizes cavitation as rapid swirl is formed.

[0098] Meanwhile tilt angle of the first slant part (331) and tilt angle of the second slant part (341) are decided considering length and width of cylindrical surface of each blade, and amount and flow rate of mixed liquid. They can be made in same or different angles with consideration of the above factors.

[0099] Referring to the drawing of Diagram 4(a), the rotating blade (330) and the fixed blade (340) have eddy boosters (337)(347) to accelerate eddy formation in mixed liquid by slanting a side of each blade against radius line with certain angle ().

[0100] Since the eddy booster (337)(347) is protruded obliquely against flow direction of mixed liquid, disturbance of mixed liquid met with the booster is promoted producing cavitation, which in turn promotes nano bubble production.

[0101] In this case, it is desirable that tilt angles of eddy booster (337)(347) in the rotating blade (330) and the fixed blade (340) be the same, but the angles can be varied with consideration of various factors such as size and length of each blade and movement of mixed liquid.

[0102] The Diagram is drawn in such a way that eddy booster (337)(347) is formed in either the rotating blade (330) or the fixed blade (340), but it can be formed in both blade. And as seen in Diagram 4(b) eddy booster (337)(347) can be formed on both sides of the rotating blade (330) and the fixed blade (340).

[0103] Diagram 1 shows that the discharge pipe (315) is installed at a portion of upper part of the pump inside to discharge mixed liquid including nano bubbles which is produced by interaction between the rotating blade (330) and the fixed blade (340). It also shows that water path (316) is formed at between pump housing (310) and the inside wall (311) in longitudinal direction of the pump in order for liquid from the discharge pipe (315) to be able to flow toward discharge side of the pump (300). The liquid that flows down along the water path is discharged to outside along the discharge pipe (400) while holding nano bubbles.

[0104] Meanwhile if the liquid, which is discharged through the discharged pipe (400) installed at discharge side of the pump, can be finized and mixed one more time by pressure change, the dissolved rate in liquid can be increased further. For this as shown in Diagram 1 the bulkhead part (500) is installed inside of the discharge pipe (400). Diagrams 5 and 6 show that the bulkhead part (500) is comprised of small diameter partition (520; SDP) and large diameter partition (530; LDP) expanded and continuously extended from SDP, and of the bulkhead where this construction of the two partitions is arranged in multiple along the flow direction of liquid inside the discharge pipe (400), wherein cavitation is accelerated by further finization through pressure change as the discharged liquid pass through the LDP (500) after it passes through the SDP (520)

[0105] In addition, it is desirable that the bulkhead part (500) include a space (540) of a certain size between continuously extended construction of the SDP (520) and the LDP (530). The discharged liquid that passes through this space is further finized and mixed by acceleration of cavitation with sudden drop of pressure. The number of SDP (520) and LDP (530), which are constructed continuously and arranged repeatedly in the bulkhead (500), should be decided to maintain discharge pressure of liquid to be 4 kg/m.sup.2, where the diameter of SDP (520) is about 1.5 mm and that of LDP (530) about 2 mm.

[0106] But, as stated above the discharge pressure and the size of the bulkhead part (500) are decided with consideration of various factors such as output of drive motor and quantity of liquid etc.

[0107] Diagram 7 and 8 are the second implementation example of NBHRG of this invention, wherein pressure pump (P) is added to supply pressurized liquid to NBHRG. The pressure pump (P) is connected to the inlet part of NBHRG (1) which is comprised of the rotating blade (330) and the fixed blade (340) inside the pump as seen in Diagram 1. The pressure pump (P) has impeller as seen in Diagram 1 and chamber (not seen). In pressure pump (P) the inlet pipe (200) and the outlet pipe (400) are connected to the inlet side and the outlet side, respectively. NBHRG (1) is connected to the outlet pipe of the pressure pump (P) through a medium of a coupling pipe (385).

[0108] On-off valve can be installed at the coupling pipe to control liquid supply or to open and shut.

[0109] The Pressure pump (P) includes pump motor (PM) and impeller installed at drive axis of the pump motor (PM). The recirculation pipe (600) is connected through the medium of joint (J) to recycle pressurized liquid from outlet pipe (400) of the pressure pump (P) to inlet pipe (200). In this case as shown in Diagram 1 air inlet pipe (120) of air inlet part can be connected, and venturi pipe (700) is connected at where the air inlet pipe (120) and the recirculation pipe (600) meet so that the previously mentioned outcome can be obtained.

[0110] From this construction pressurized liquid is supplied from the pressure pump (P) through the coupling pipe (385) at inlet section formed in bottom portion of the pump (33). Gases in liquid are discharged through the outlet (383), which is installed at upper portion of the pump, after they are finized and mixed by pressure striking by each blade. In this case discharge pipe (800) is connected at the outlet (383) and has on-off valve to control liquid quantity or to open and shut. In addition, the previously mentioned bulkhead part (500) can be installed at the discharge pipe (800), wherein the secondary cavitation is promoted as previously mentioned.

[0111] Next section is about the Processing System to Decontaminate Water Without Chemicals (PSDWWC) using NBHRG of this invention. This system purifies, on land without any chemicals, various kinds of contaminated water from lakes, streams, homes and factories.

[0112] Diagram 9 and 10 show the PSDWWC in this invention for solid-liquid separation using NBHRG of Diagram 1 or 7 without compressor for air intake and pressure tank used in a Terminal Disposal Plant of Sewage. Diagram 9 is (a) front view and (b) plane view of PSDWWC, and Diagram 10 is a sketch of water tanks of PSDWWC of Diagram 9 that does not use compressor for air intake and pressure tank of DAF system used in a current Terminal Disposal Plant of Sewage, especially illustrating organization of the first water tank. According to Diagram 9a and 9b PSDWWC is comprised of several water tanks (T.sub.1, T.sub.2, T.sub.3) which are connected in a row. Each water tank has a certain width and length, and is connected in the direction of width or length.

[0113] For example, each water tank (T.sub.1, T.sub.2, T.sub.3) can be connected in the direction of width as shown in Diagram 9 while the inside of a tank is divided by partition wall at regular interval. And outlet hole (37) is constructed in a partition wall so that water processed in a previous tank can move to the next tank.

[0114] Each water tank (T.sub.1, T.sub.2, T.sub.3) is divided into processing room for inflowing water (20; PRIW) and storage room for processed water (40; SRPW). A transfer pipe for processed water (6) and collection pipe for processed water (5), which are connected to outlet pipe (400) and inlet pipe (200) of NBHRG (1), are installed in PRIW (20) and SRPW (40) in each water tank, respectively. A spray nozzle can be installed for pressure spray of nano bubbles and pressurized liquid at the end of the transfer pipe for processed water (6) which is installed at PRIW of each water tank.

[0115] In case of the first water tank (T.sub.1) a water pipe (4) can be connected through inlet for original water (33) to supply original contaminated water as shown in Diagram 10. Each water tank (T.sub.1, T.sub.2, T.sub.3) is connected through outlet holes (37) formed at partition walls which are installed to divide each tank. The PRIW (20) and the SRPW (40) of each tank are connected to each other through hole (34) formed at wall that divides them. It is desirable that the hole (34) that connects the PRIW (20) and the SRPW (40) should be made, if possible, at the bottom portion of division wall (31). A stopping plate (32) can be installed at certain place between the above hole (34) and the end of the transfer pipe for processed water (6) in the PRIW (20) of each tank. This stopping plate prevents contaminated water or inflowing water unprocessed by high pressure nano bubbles from NBHRG (1) from flowing into next water tank. The spray nozzle at the end of the transfer pipe of processed water (6) should be placed over the stopping plate (32).

[0116] A means to remove sludge (10) is installed at the upper portion of the PRIW (20) of each water tank (T.sub.1, T.sub.2, T.sub.3). This means to remove sludge (10) is comprised of conveyor belt or chain (13) whose surface has several transfer plates (14). The conveyor belts (13) of each means to remove sludge (10) cross upper portions of each water tank. And the conveyor belts are moved by sprocket which is turned by driving shaft (11a) extended from the motor (11) so that the transfer plates (14) on the surface of the belt filter sludge or impurities floating over upper portion of original contaminated water or inflowing water in PRIW (20), and then discharge them through outlet channel (35, 36) installed at upper portion of the rear of the PRIW (20).

[0117] The following is explanation about the operation of the Processing System to Decontaminate Water Without Chemicals (PSDWWC) in this invention while referring to Diagram 9 and 10. If original contaminated water flows into the first water tank (T.sub.1), through water pipe (4), the first NBHRG (1) draws purified water (processed water) from the SRPW (40) through collection pipe for processed water (5) and produces nano bubbles, which is then supplied to the PRIW (20) of the first water tank (T.sub.1) through transfer pipe for processed water (6). Nano bubbles spouted into the PRIW (20) of the first water tank (T.sub.1) float to the top of processed room after they collide with the stopping plate (32). At this time sludge or impurities in original contaminated water float to top with nano bubbles. Sludge and impurities floating on top of the PRIW (20) are moved to rear by the transfer plates (14) as the means to remove sludge (10) moves. And then the filtered sludge or impurities are discharged to outside through the outlet channel (35, 36) installed at rear upper portion of the PRIW (20).

[0118] On the one hand, the processed water, which is transported to the SRPW through the hole (31) formed at division wall (34) after sludge and impurities are removed, moves to the PRIW (20) of the second water tank (T.sub.2) through the outlet holes (37). A portion of it, as mentioned the above, is supplied to the first NBHRG (1) through the collection pipe for processed water (5).

[0119] The processed water from the first water tank (T.sub.1), which flowed to the second water tank (T.sub.2), is processed again as was done in the first water tank (T.sub.1) so that additional sludge and impurities float on top of processing room (20) by nano bubbles supplied by the second NBHRG (2), and then moves to the SRPW (40) through the hole (34) at the division wall (34) after filtered by the means to remove sludge (10).

[0120] The processed water in the SRPW (40) then moves to the PRIW (20) of the third tank (T.sub.3) and at the same time a portion of it is supplied to the second NBHRG (2) through the collection pipe for processed water (5) and produces nano bubbles.

[0121] The processed water from the second water tank (T.sub.2), which flowed to the third water tank (T.sub.3), is processed again as was done in the second water tank (T.sub.2) so that the rest sludge and impurities float on top of processing room (20) by nano bubbles supplied by the third NBHRG (3), and then moves to the SRPW (40) through the hole (34) at the division wall (34) after filtered by the means to remove sludge (10). The processed water in the SRPW (40) is finally discharged to outside and at the same time a portion of it is supplied to the third NBHRG (3) through the collection pipe for processed water (5) and then the process of nano bubble production is repeated.

[0122] As explained above PSDWWC of this invention makes sludge and impurities of inflowing original water floated on top of the water tank by nano bubbles discharged with strong pressure from the first through the third NBHRG. Floating sludge and impurities are discharged outside after being transported by the means to remove sludge so that only purified liquid is supplied to the next water tanks (T.sub.2 and T.sub.3) and then finally utilized. Turbidity and heavy metals in the processed liquid are decomposed by nano bubbles and hydroxyl radicals in sludge, and the amount of dissolved oxygen and anions is high so that it helps greatly to restore ecosystem.

[0123] In addition, the liquid processed in this invention can be reused because it has sterilizing power. And this invention uses NBHRG to remove contaminants without using current coagulant chemicals so that it prevents secondary pollution by coagulant polymers. And it is cost effective by reducing energy consumption 50% because it does not use pressure tank and air compressor of DAF system in current Terminal Disposal Plant of Sewage.

[0124] The above description is focused on limited configuration and aspect of NBHRG in this invention, but it can be modified and changed by the manufacturer. And its modification and change should be included in confines of rights of this invention.

TABLE-US-00001 [Explanation of Symbols] P: Pressure pump PM: Pressure Motor J: Joint 100: Air inlet part 110: Control gauge for liquid quantity 120: Air inlet pipe 200: Inlet pipe 210: On-off valve 300: Pump 310: Pump housing 311: Inside wall 315: Discharge pipe 320: Drive motor 330: Rotating blade 331: First slant part 333: First small teeth 335: First large teeth 337: First eddy booster 340: Fixed blade 341: Second slant part 343: Second small teeth 345: Second large teeth 347: Second eddy booster 349: Fixed bolt 360: Motor axis (shaft) 370: Impeller 380: Chamber 381: Inlet 383: Outlet 385: Coupling pipe 400: Outlet pipe 410: On-off valve 420: Outlet pipe 500: Bulkhead part 510: Bulkhead 520: Small diameter partition 530: Large diameter partition 540: Space 600: Recirculation pipe 700: Venturi pipe 800: Discharge pipe