METHOD FOR PROCESSING EXPLOSIVE PRODUCTS IN A SEPARATING MACHINE, AND SEPARATING MACHINE

Abstract

The invention relates to a method for processing explosive products in a separating machine (10) which comprises a rotary apparatus (30) located in a drum (20), wherein the drum (20) is located in a machine housing (40). According to the invention, a cooling liquid is applied, in particular sprayed, onto an outer surface (21) of the drum (20), at least onto portions thereof and/or intermittently, during processing of the products, and the temperature in the machine housing (40) is monitored during processing.

Claims

1. A method for processing explosive products in a separating machine, in particular in a solid bowl screw centrifuge (10) or a separator (10′), which comprises a rotary device, in particular a screw (30) or a disc stack (30′), located in a drum (20), wherein the drum (20) is located in a machine housing (40), characterized in that cooling liquid is directly or indirectly applied, in particular sprayed onto the outer surface (21) of the drum (20) at least onto portions thereof and/or intermittently during processing of the products, and the temperature in the machine housing (40) is monitored during processing.

2. The method according to claim 1, characterized in that the maximum temperature of the cooling liquid, in particular the maximum temperature of the cooling liquid located in a tank, is regulated, in particular to a maximum temperature of 35° C., in particular 30° C., in particular 25° C.

3. The method according to claim 1, characterized in that a cooling liquid inflow (52) and/or spraying nozzles (51) is/are activated in temporal intervals, and cooling liquid is distributed, preferably via spraying nozzles (51), within the machine housing (40), and preferably in portions on inner sides (43) of the machine housing.

4. The method according to claim 3, characterized in that upon detecting a first temperature threshold value in the machine housing (40) and/or in a liquid phase outflow (72), the cooling liquid inflow (52) and/or spraying nozzles (51) is/are activated.

5. The method according to claim 4, characterized in that upon detecting a second temperature threshold value, which is higher than the first temperature threshold value, a supply of the product to be processed in the separating machine, in particular the solid bowl screw centrifuge (10) or the separator (10′), is stopped in the machine housing (40) and/or in the liquid phase outflow (72) and liquid is supplied into the drum (20).

6. The method according to claim 5, characterized in that upon detecting a third temperature threshold value, which is higher than the second temperature threshold value, the separating machine, in particular the solid bowl screw centrifuge (10) or the separator (10′) is switched off.

7. The method according to claim 3, characterized in that upon detecting a/the second temperature threshold value, the cooling liquid, in particular the cooling liquid located in a tank, is cooled itself such that the maximum temperature of the cooling liquid has a lower value than this was specified and/or regulated before the first temperature threshold value was detected.

8. The method according to claim 1, characterized in that the cooling liquid is collected after the application, in particular after the spraying, in the machine housing (40), and is subsequently used again for cooling, in particular spraying.

9. A separating machine, in particular a solid bowl screw centrifuge (10) or a separator (10′) for performing a method according to claim 1 for processing explosive products, wherein the separating machine, in particular the solid bowl screw centrifuge (10) or the separator (10′) has a rotary device, in particular a screw (30) or a disc stack (30′), located in a drum (20), wherein the drum (20) is located in a machine housing (40), characterized in that a cooling device, in particular a spraying system (50) with several spraying nozzles (51), is formed in the machine housing (40), wherein the cooling device, in particular at least one of the spraying nozzles (51), is directed towards the outer surface (21) of the drum (20) or is arranged such that cooling liquid can be applied onto the outer surface (21) of the drum (10), and furthermore, at least one temperature monitoring unit (60) is formed in the machine housing (40).

10. The separating machine according to claim 9, characterized in that the cooling device is designed as an intermediate space formed in the machine housing (40), wherein a cooling liquid is circulable in the intermediate space, and the intermediate space is formed by at least one outer surface (21) of the drum (20) and a further housing portion spaced from the outer surface (21).

11. The separating machine according to claim 9, characterized in that a tank for storing the cooling liquid has a temperature monitoring unit and/or a device for cooling the cooling liquid.

12. The separating machine according to claim 9, characterized in that in a liquid phase outflow (72, 93, 94), a temperature monitoring unit (63, 65, 66) is formed.

13. The separating machine according to claim 9, characterized in that in the machine housing (40), a collecting and returning device (80) for used cooling liquid is formed.

Description

[0082] Hereinafter, the method according to the invention as well as the associated separating machine according to the invention will be described in more detail on the basis of schematic representations.

[0083] Shown are in:

[0084] FIG. 1 a solid bowl screw centrifuge according to the invention; and

[0085] FIG. 2 a separator according to the invention.

[0086] In the following, the same reference numerals will be used for equal components and components of equal action.

[0087] The solid bowl screw centrifuge 10 represented in FIG. 1 comprises a screw 30 located in a drum 20. The component group, which comprises both the drum 20 and the screw 30, is generally referred to as a rotor. The rotor is characterized in that both the drum 20 and the screw 30 are rotating.

[0088] The drum 20 and the rotor, respectively, are located in a machine housing 40. In the machine housing 40, in particular in the area of the cover side 41 of the machine housing 40, a spraying system 50 is located. The spraying system 50 has several spraying nozzles 51. The spraying nozzles 51 are directed towards the drum 20 in such a manner that cooling liquid, in particular cooling water, can be sprayed onto the outer surface 21 at least in portions.

[0089] Preferably, the spraying nozzles 51 are oriented such that spraying onto the upper half of the outer surface 21 of the drum is enabled. As the upper half, the half of the drum 20 or of the outer surface 21 is to be understood, which is formed in an imaginary section through the longitudinal axis L of the screw. Since the drum 20 rotates in processing a product, the complete or almost the complete outer surface of the drum 20 is cooled during processing.

[0090] The spraying nozzles 51 are distributed within the machine housing such that the cooling liquid impinges onto the inner sides 43 of the machine housing 49 also in portions.

[0091] Additionally, it is possible for such spraying nozzles to be used, which are also arranged in the bottom side 42 of the machine housing 40 so that a simultaneous fully complete spraying onto the outer surface 21 of the drum 20 is enabled during processing of the product. If spraying nozzles are intended to be formed in the area of the bottom side 42 of the machine housing 40, these possibly need to be operated at a higher pressure so that cooling of the outer surface 21 is possible.

[0092] Furthermore, it can be recognized that the solid bowl screw centrifuge 10 is formed having several temperature monitoring units 60-63. The temperature monitoring units 60-62 determine the temperatures in the machine housing 40 in this case. The temperature monitoring unit 63 detects or monitors the temperature of the centrate 70 generated by the solid bowl screw centrifuge 10.

[0093] For processing explosive products, these products are transported into the drum inner space 18 via the inlet tube 15. In the drum inner space 18, which can also be referred to as a separating space, separation of the explosive product into a solid matter as well as a centrate 70 takes place.

[0094] The solid matter is correspondingly evacuated via a solid matter outlet 71 (only illustrated schematically). During processing of the explosive product, cooling liquid is sprayed onto the outer surface 21 of the drum 20 by means of the spraying system 50. At the same time, detecting or monitoring of the temperature in the machine housing 40 is performed. In the present example, this is performed via the temperature monitoring units 60, 61, and 62.

[0095] It is possible for the cooling liquid used in the spraying system 50 to be regulated with respect to the temperature. A regulation to a maximum temperature of 25° C. is performed in particular.

[0096] Additionally, the temperature of the centrate 70 is monitored by means of the temperature monitoring unit 63.

[0097] When a first temperature threshold value is detected in the machine housing 40 and/or in the liquid phase outflow 72, in which the centrate 70 is transported, supply of the product to be processed in the solid bowl screw centrifuge 10 preferably is stopped, and cooling liquid, in particular water, is introduced or pumped into the drum 20. The water is transported into the drum inner space 18 via the inlet tube 15. This results in the product to be temporarily cooled and diluted in the drum inner space 18. Dilution of the product causes the flashpoint of the product to increase.

[0098] Upon detecting a second temperature threshold value, which is higher than the first temperature threshold value, the solid bowl screw centrifuge 10 is preferably switched off.

[0099] Alternatively, or complementarily, it is possible for the cooling liquid itself, upon detecting a/the second temperature threshold value, to be additionally or alternatively cooled such that the maximum temperature of the cooling liquid has a lower value than this was specified before the first temperature threshold value was detected. Cooling or temperature regulation of the cooling liquid preferably is performed in the cooling liquid inlet 52 of the spraying system 50.

[0100] After spraying in the machine housing 40, cooling liquid can be collected by means of a collecting and returning device 80 and subsequently be transported to the cooling liquid inlet 52. This enables cooling liquid to be used in a solid bowl screw centrifuge 10 in a resource-friendly manner.

[0101] In FIG. 2, a further embodiment of a separating machine, namely an embodiment of a separator 10′ is illustrated. The illustrated separator 10′ is a 3-phase separator. The method according to the invention or the device according to the invention, however, can also be applied to 2-phase separators.

[0102] In a drum 20, a rotatable disc stack 30′ is arranged. The drum 20 is located in the machine housing 40 together with the disc stack 30′. A spraying system 50 is located at least in part in the machine housing 40. The spraying system 50 has several spraying nozzles 51.

[0103] One spraying nozzle 51 is arranged in this case such that spraying onto an upper portion of the outer surface 21 of the drum 20 is enabled. As the upper portion, the portion of the drum 20 or the outer surface 21 is to be understood, which is formed in case of an imaginary section through the horizontal axis H of the drum 20. The horizontal axis H extends in particular on the level of the outlet openings 90 formed in particular as outlet nozzles.

[0104] Since the drum 20 is rotating when the product is processed, the upper portion of the outer surface of the drum 20 is completely or almost completely cooled during processing.

[0105] According to the embodiment of FIG. 2, such a spraying nozzle 51′ is additionally formed to be directed to the area of the web 91. The separated solid matter is in particular transported along the web 91. In the area of the web, increased temperatures are thus to be expected in particular.

[0106] A further exemplary spraying nozzle 51″ is arranged in the area of the lower portion or the bottom side 41 of the machine housing 40. Accordingly, the spraying nozzle 51″ is oriented such that cooling liquid can be applied onto a lower portion of the drum 20.

[0107] The separated solid matter preferably gets into a solid matter cyclone 92. In this solid matter cyclone 92 as well, a spraying nozzle 51 may be formed. This also prevents an already separated solid matter from ignition/explosion during temporary storage in the solid matter cyclone 92.

[0108] It can be recognized that the separator 10′ is formed having several temperature monitoring units 60, and 64-67. The temperature monitoring unit 60 determines in this case the temperature in the machine housing 40, in particular in the area above the horizontal axis H.

[0109] Furthermore, a temperature monitoring unit 64 is formed in the area of the bottom side 42 of the machine housing.

[0110] Furthermore, a temperature monitoring unit 66 is formed in the area of the heavy liquid phase outflow 94, and a temperature monitoring unit 65 is formed in the area of the light phase outflow 93.

[0111] In other words, the temperature monitoring unit 66 detects the temperature of the heavy liquid phase generated by the separator 10′. The temperature monitoring unit 65 detects or monitors the temperature of the light liquid phase generated by the separator 10′.

[0112] For processing explosive products, these products are transported into the drum inner space 18 via the stationary inlet tube 15. In the drum inner space 18, which can also be referred to as a separating space, a separation of the explosive product into a solid matter, a light liquid phase, as well as a heavy liquid phase takes place.

[0113] During processing of the explosive product, cooling liquid is sprayed at least intermittently onto the outer surface 21 of the drum by means of the spraying system 50. At the same time, detecting or monitoring of the temperature in the machine housing 40 is performed.

[0114] It is possible for the cooling liquid used in the spraying system 50 to be regulated with respect to the temperature. A regulation to a maximum of 25° C., for example, is performed in particular. In addition, the temperature of the solid matter is monitored in the area of the bottom side 42 of the machine housing 40. Temperature monitoring by means of the temperature monitoring unit 67 in the area of the solid matter cyclone 92 is advantageous, as well.

[0115] Detecting temperature threshold values, in particular a first, a second, and a third temperature threshold value, and the therewith related regulation of the operation of the separator 10′ substantially corresponds to the method in conjunction with the solid bowl screw centrifuge 10. Consequently, it is also possible for cooling liquid to be transported into the drum inner space 18 via the inlet tube 15, when a second temperature threshold value has been detected. This results in the product to be cooled and diluted temporarily in the drum inner space. Diluting the product causes the flashpoint of the product located in the drum inner space 18 to increase.

[0116] Upon detecting a third temperature threshold value, which is higher than the second temperature threshold value, the separator 10′ preferably is switched off.

[0117] In conjunction with the separator 10′, as well, the cooling liquid, after spraying in the machine housing 40, may be collected by means of a collecting and returning unit (not illustrated), and subsequently may be transported to the cooling liquid inlet 52. Due to that, an environmentally friendly use of cooling liquid can be enabled in a separator 10′.

[0118] Incidentally, the same explanations apply as in conjunction with the solid bowl screw centrifuge 10.

LIST OF REFERENCE NUMERALS

[0119] 10 solid bowl screw centrifuge

[0120] 10′ separator

[0121] 15 inlet tube

[0122] 18 drum inner space/separating space

[0123] 20 drum

[0124] 21 outer surface

[0125] 30 screw

[0126] 30′ disc stack

[0127] 40 machine housing

[0128] 41 cover side

[0129] 42 bottom side

[0130] 43 inner side

[0131] 50 spraying system

[0132] 51, 51′, 51″ spraying nozzle

[0133] 52 cooling liquid inflow

[0134] 60-63 temperature monitoring unit

[0135] 64-67 temperature monitoring unit

[0136] 70 centrate

[0137] 71 solid matter outlet

[0138] 72 liquid phase outflow

[0139] 80 collecting and returning device

[0140] 90 outlet opening

[0141] 91 web

[0142] 92 solid matter cyclone

[0143] 93 light liquid phase outflow

[0144] 94 heavy liquid phase outflow

[0145] H horizontal axis

[0146] L longitudinal axis