SCRUBBER, EXHAUST GAS PURIFICATION SYSTEM COMPRISING SCRUBBER, AND AIR PURIFICATION METHOD

Abstract

A scrubber, an exhaust gas purification system comprising the scrubber, and an air purification method. The treatment water of the scrubber is plasma electrolytic water. The plasma electrolytic water is obtained after water is electrolyzed. The process of electrolysis is carried out in an electromagnetic water treatment device. The electromagnetic water treatment device comprises a cation exchange film, a water flow passage, at least one positive pole panel, at least one negative pole panel, and a magnetic device.

Claims

1. An exhaust gas purification system comprising a scrubber, characterized in that, treatment water of the scrubber is plasma electrolytic water, and the plasma electrolytic water is prepared by the following method: water is electrolysed, and the plasma electrolytic water is obtained.

2. The exhaust gas purification system according to claim 1, wherein the exhaust gas purification system further comprises an electrolysed water production device, a water tank, and a filter; the electrolysed water production device, the scrubber, the filter, and the water tank are circularly connected in turn.

3. The exhaust gas purification system according to claim 2, wherein the electrolysed water production device is a reactor continuously generating high redox water; wherein, the reactor continuously generating high redox water consists of a positive pole, a negative pole, a cation exchange film and an insulating housing, the positive pole, and the negative pole are disposed on the inner side in longitudinal direction of the insulating housing with acid and alkali resistances, and high voltage resistance, the two poles are parallel and equidistant, the distance between the positive pole and the negative pole is 2-80 mm; a water inlet and a water outlet are disposed on the both sides of the insulating housing, water is injected into a pipe, water inflows from one end, and outflows from the other end; the water inlet, the negative pole, the cation exchange film, the positive pole and the water outlet are disposed in the longitudinal direction of the insulating housing in turn, the cation exchange film is located in the position parallel to the positive pole and the negative pole and respectively having equal distance from the two pole surfaces; the positive pole and the negative pole are connected to high voltage DC power supply, 100-5000 VDC of DC voltage is applied between the positive pole and the negative pole, to form the reactor continuously generating high redox water; and/or, in the reactor, the water outlet is disposed to one or more; and/or, material of the positive pole is prepared using selected materials of graphite panel, platinum coating panel, ruthenium and iridium coated titanium panel or titanium panel.

4. The exhaust gas purification system according to claim 3, wherein the DC voltage is 3000-5000 VDC.

5. The exhaust gas purification system according to claim 2, wherein the electrolysed water production device is an electromagnetic water treatment device; wherein, the electromagnetic water treatment device comprises a cation exchange film, a water flow passage, at least one positive pole panel and at least one negative pole panel, and a magnetic device; the positive pole panel and the negative pole panel are disposed on the water flow passage, and applied an electric field, to electrolyze the solution in the water flow passage; the cation exchange film is disposed inside the water flow passage, is located between the positive pole panel and the negative pole panel, and divides the water flow passage into a first water flow passage and a second water flow passage; the magnetic device is disposed on the water flow passage, to apply a magnetic field perpendicular to the direction of the electric field in the water flow passage.

6. The exhaust gas purification system according to claim 5, wherein in the electromagnetic water treatment device, the magnetic device is several magnetic sheets, and the magnetic sheets are disposed to stick on two relative outer walls of the water flow passage; several discharge needles are distributed on the positive pole panel and the negative pole panel; the magnetic field intensity is 2000-6000 gauss; after being electrolysed outflows from an outlet of the electromagnetic water treatment device, the water outflows in any of the following ways: way 1: water outflows respectively from the first water flow passage and the second water flow passage; way 2: water outflows from confluence of the first water flow passage and the second water flow passage.

7. An air purification method, wherein the air purification method uses the exhaust gas purification system according to claim 1 for treating exhaust gas.

8. The air purification method according to claim 7, wherein the exhaust gas is exhaust gas of xylene and/or formaldehyde.

9. The air purification method according to claim 8, wherein the concentration of the xylene or formaldehyde in the exhaust gas is 1 mg/m.sup.3-2000 mg/m.sup.3; flow rate ratio of the treatment water to the exhausted gas in the scrubber is 1-3 L/m.sup.3; gas superficial velocity in the scrubber is 0.1-20 m/s.

10. The air purification method according to claim 9, wherein the concentration of the xylene or formaldehyde in the exhaust gas is 10 mg/m.sup.3-50 mg/m.sup.3; the gas superficial velocity in the scrubber is 0.5-1 m/s.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present disclosure is described in conjunction with the appended figures:

[0040] FIG. 1 is a partial structure view of the electromagnetic water treatment device producing the plasma electrolytic water in a preferred embodiment of the present invention.

[0041] FIG. 2 is an internal structure view of the water flow passage of the electromagnetic water treatment device producing the plasma electrolytic water in a preferred embodiment of the present invention.

[0042] FIG. 3 is a structure view of the exhaust gas purification system in a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0043] The following embodiments further illustrate the present invention, but the present invention is not limited thereto. The unspecified conditions of the experiment methods in the following embodiments are selected according to common method and condition, or according to the commodity instruction.

Embodiment 1

[0044] FIGS. 1 and 2 illustrate an electromagnetic water treatment device 1 of the present invention. The electromagnetic water treatment device 1 comprises a cation exchange film 15, a water flow passage 14, at least one positive pole panel 111 and at least one negative pole panel 112, and a magnetic device 12; the positive pole panel 111 and the negative pole panel 112 are disposed on the water flow passage, and applied an electric field, to electrolyze the solution in the water flow passage; the cation exchange film 15 is disposed inside the water flow passage 14, is located between the positive pole panel and the negative pole panel, and divides the water flow passage 14 into a first water flow passage 142 and a second water flow passage 141; the magnetic device 12 is disposed on the water flow passage, to apply a magnetic field perpendicular to the direction of the electric field in the water flow passage, and in the present embodiment, the magnetic device is a plurality of magnetic sheets 121, the strength of the magnetic field produced by the magnetic sheets is 6000 gauss. Several discharge needles 114 are distributed on the positive pole panel and the negative pole panel. The positive pole panel and the negative pole panel are respectively connected to the positive and the negative of the power supply through a wire 113. When tap water passes through the electromagnetic water treatment device, electricity is provided for electrolysis. The tap water generally contains sodium chloride, magnesium chloride and other mineral salts, according to the principle of electrolysis of water, under the effect of the cation exchange film, electrolytic acidic water will be produced nearby the positive pole panel 111, and it contains a lot of negative oxygen ions (O.sup.2, O.sup.3), having strong oxidation; electrolytic alkaline water will be produced nearby the negative pole panel 112. And in the presence of the magnetic field perpendicular to the water flow passage, water flows in the pipe, in the case of cutting the magnetic field the positive and negative ions in the water will be affected by a Lorentz force which will accelerate the movement of the positive and negative ions towards the pole panels. Taking the present embodiment as an example, according to FIG. 2, the magnetic sheets 121 upper of the water flow passage are N-pole magnetic sheets, the magnetic sheets 121 lower of the water flow passage are S-pole magnetic sheets, during the electrolysis process while moving to the negative pole panel with a large number, the cations will also move and cut the magnetic induction line along the flow direction (the flow direction is shown as x in FIG. 2) and affected by the Lorentz force directing to the negative pole panel 112, to accelerate the movement of the cations. Water outflows from confluence of the first water flow passage 142 and the second water flow passage 141 to obtain electrolytic neutral water; water outflows respectively from the first water flow passage 142 and the second water flow passage 141 to simultaneously obtain electrolytic acidic water and electrolytic alkaline water.

[0045] In practical applications, the disposition of positive and negative pole panels and N-pole and S-pole of the magnetic sheets, as well as the flow direction can be adjusted and coordinated in accordance with the actual situation, as long as the electrolysis and magnetic field cooperates to accelerate the movement of the ions in the water.

Embodiment 2

[0046] As shown in FIG. 3, the present embodiment provides an exhaust gas purification system, the exhaust gas purification system comprises an electromagnetic water treatment device 1, a scrubber 4, a filter 3, and a water tank 2; the electromagnetic water treatment device 1, the scrubber 4, the filter 3, and the water tank 2 are circularly connected in turn. The scrubber 4 comprises an gas inlet 42, a tower tube 48, a gas outlet 41, and a water outlet 49; two nozzles, and three filler layers are disposed inside the tower tube 48, from the top to the bottom a first nozzle 43, a first filler layer 44, a second filler layer 45, a second nozzle 46 and a third filler layer 47 are disposed in turn.

[0047] Water from the water tank 2 enters the electromagnetic water treatment device 1 after being electrolysed to obtain plasma electrolytic water of the present invention, the plasma electrolytic water is sprayed to the first filler layer 44, the second filler layer 45 and the third filler layer 47 inside the tower tube through the first nozzle 43 and second nozzle 46, and the exhaust gas enters into the tower tube through the gas inlet 42 at the bottom of the tower tube and then passes through the third filler layer 47, the second filler layer 45 and the first filler layer 44 in turn, after the absorption of the plasma electrolytic water and decomposition reaction, the gas is expelled from the gas outlet 41 at the top of the tower tube. The plasma electrolytic water outflows from the water outlet 49 at the bottom of the tower tube, flowing through the filter 3 to filter, passing through the water tank 2 and re-entering the electromagnetic water treatment device 1, and repeating the above processes, the water of which has always been recycled. After the end of the exhaust gas treatment process, expelling the plasma electrolytic water.

Embodiment 3

[0048] The present embodiment is substantially the same as embodiment 2, except that, using a reactor continuously generating high redox water in embodiment 1 of Chinese patent application having an authorization publication No.: CN102320684B of invention patent (the content of which is incorporated herein by reference in its entirety) to replace the electromagnetic water treatment device 1 in the embodiment 2 of the present invention. The height of the filler layer in the scrubber is 2 m, and the gas superficial velocity in the scrubber is 0.5 m/s.

Embodiment 4

[0049] The present embodiment is substantially the same as embodiment 2, except that, the voltage between the positive pole and negative pole is 3000 volts DC; using a reactor continuously generating high redox water in embodiment 2 of the invention patent having an authorization publication No.: 102320684B (the content of which is incorporated herein by reference in its entirety) to replace the electromagnetic water treatment device 1 in the embodiment 2 of the present invention. The height of the filler layer in the scrubber is 5 m, and the gas superficial velocity in the scrubber is 1 m/s.

Embodiment 5

[0050] This embodiment is substantially the same as embodiment 3, except that, the voltage between the positive pole and negative pole is 100 volts DC. The oxidation-reduction potential of the produced electrolytic acidic water is 800 mv, and the oxidation-reduction potential of the electrolytic alkaline water is preferably 800 my. The height of the filler layer in the scrubber is 1 m, and the gas superficial velocity in the scrubber is 20 m/s. The flow rate ratio of the treatment water to the exhausted gas in the scrubber is 1 L/m.sup.3.

Embodiment 6

[0051] This embodiment is substantially the same as embodiment 3, except that, the voltage between the positive pole and negative pole is 5000 volts DC. The oxidation-reduction potential of the produced electrolytic acidic water is 1500 mv, and the oxidation-reduction potential of the electrolytic alkaline water is 1200 mv. The height of the filler layer in the scrubber is 10 m, and the gas superficial velocity is 0.1 m/s. The flow rate ratio of the treatment water to the exhausted gas in the scrubber is 3 L/m.sup.3.

[0052] Using the double-deck scrubber of the exhaust gas purification system in embodiment 3, the conventional absorption liquid and the plasma electrolytic water are respectively used for treating exhaust gas. Conventional absorption liquid generally may be sodium hydroxide solution, sulfuric acid solution or sodium hypochlorite solution. Conventional absorbent solution used in the present embodiment is sodium hypochlorite solution. The water amount in the double-deck scrubber is 1 ton.

[0053] 10000 m.sup.3 of the exhaust gas containing xylene or formaldehyde is hourly passed into for treatment. The concentration of the xylene in the exhaust gas in table 1 is 50 mg/m.sup.3. The concentration of the formaldehyde in the exhaust gas in table 2 is 10 mg/m.sup.3. After the treatments respectively using the methods of the present invention and conventional treatment, test the concentration of the xylene or formaldehyde in the gas outlet and in the water.

[0054] The detection method of the formaldehyde in the air: spectrophotometer chemical analysis

[0055] The detection method of the formaldehyde in the water: AHMT spectrophotometry of GB/T5750.10-2006 Standard Examination Methods for Drinking Water.

[0056] The detection method of the xylene in the air: GB11737-89 gas chromatographic method

[0057] The detection method of the xylene in the water: gas chromatographic method

TABLE-US-00001 TABLE I Treatment of the exhaust gas containing the xylene concentration concentration initial concentration concentration in the plasma in the plasma concentration of the gas of the gas electrolytic electrolytic of the gas outlet after outlet after water after water after inlet 2 hours 4 hours 2 hours 4 hours the treatment 50 mg/m.sup.3 5 mg/m.sup.3 4.5 mg/m.sup.3 1 g/m.sup.3 0.9 g/m.sup.3 using the plasma electrolytic water of the present invention conventional 50 mg/m.sup.3 49 mg/m.sup.3 48 mg/m.sup.3 4 g/m.sup.3 4 g/m.sup.3 treatment

TABLE-US-00002 TABLE II Treatment of the exhaust gas containing the formaldehyde concentration concentration initial concentration concentration in the plasma in the plasma concentration of the gas of the gas electrolytic electrolytic of the gas outlet after outlet after water after water after inlet 2 hours 4 hours 2 hours 4 hours the treatment 10 mg/m.sup.3 0.05 mg/m.sup.3 0.047 mg/m.sup.3 0.7 mg/m.sup.3 0.65 mg/m.sup.3 using the plasma electrolytic water of the present invention Conventional 10 mg/m.sup.3 0.7 mg/m.sup.3 0.65 mg/m.sup.3 190 g/m.sup.3 350 g/m.sup.3 treatment

[0058] All of embodiments 1, 2, and 4-6 can achieve the above effects.

[0059] Although the specific embodiments of the present invention are described foregoing, a person skilled in the art should understand that these are only illustrative examples, various changes or modifies can be made to these embodiments without departing from the principle and essence of the invention.