CN109847444B - Solution backheating generation and purification system - Google Patents
Solution backheating generation and purification system Download PDFInfo
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- CN109847444B CN109847444B CN201910033438.2A CN201910033438A CN109847444B CN 109847444 B CN109847444 B CN 109847444B CN 201910033438 A CN201910033438 A CN 201910033438A CN 109847444 B CN109847444 B CN 109847444B
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- 238000000746 purification Methods 0.000 title claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 157
- 238000011010 flushing procedure Methods 0.000 claims abstract description 41
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 239000000243 solution Substances 0.000 claims description 182
- 238000000926 separation method Methods 0.000 claims description 14
- 239000011550 stock solution Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000007774 longterm Effects 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005406 washing Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 8
- 238000005352 clarification Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Abstract
The invention discloses a solution backheating generation purification system which comprises a liquid storage tank and generation purification equipment, wherein the liquid storage tank comprises a liquid outlet and a liquid return port, the solution backheating generation purification system further comprises a first filter and a first filtering pipeline, a first solution inlet, a first solution outlet, a first flushing inlet and a first flushing outlet are formed in the outer wall surface of the first filter, the first solution inlet is connected with the liquid outlet, the first solution outlet is connected with the inlet of the generation purification equipment, the outlet of the generation purification equipment is connected with the liquid return port, the liquid storage tank, the first filter and the generation purification equipment form a solution circulation loop, and two ends of the first filtering pipeline are respectively connected with the outlet of the generation purification equipment and the first flushing inlet and are communicated with the generation purification equipment and the first filter. The purification effect of the solution in the solution circulation loop is realized, and long-term shutdown and disassembly maintenance are not required.
Description
Technical Field
The invention relates to a solution backheating generation and purification system.
Background
In a solution pipeline, particularly in a solution pipeline with heat exchange equipment, solid particles commonly exist in the solution due to corrosion flushing, solution adsorption and the like, so that the phenomenon of blocking the pipeline equipment is easy to occur. Therefore, the heat exchange effect of the heat exchange equipment can be reduced, the pipeline circulation resistance is increased, the pump lift of the pump in the pipeline is affected, the pump equipment in the pipeline is directly caused to stop operating when the pump is severe, and the pipeline fluid cannot normally circulate. Especially plate heat exchangers or finned tube heat exchangers often require disassembly for cleaning due to clogging, and many conditions do not allow long-term shutdown and disassembly of the heat exchange equipment.
Disclosure of Invention
The invention aims to overcome the defects existing in the prior art, and provides a solution backheating generation purification system.
The invention is realized by the following technical scheme:
the utility model provides a solution backheating takes place clean system, its includes the liquid reserve tank and takes place clarification plant, the liquid reserve tank is including liquid outlet and liquid return port, solution backheating takes place clean system still includes first filter and first filtration pipeline, the outer wall of first filter is equipped with first solution inlet, first solution outlet, first washing import and first washing export, first solution inlet connection in the liquid outlet, first solution outlet connection in take place clarification plant's import, take place clarification plant's exit linkage in the liquid return port, just the liquid reserve tank first filter with take place clarification plant and be formed with solution circulation circuit, the both ends of first filtration pipeline connect respectively in take place clarification plant's export with first washing import and with take place clarification plant with first filter is linked together.
Further, the solution backheating generation purification system further comprises a second filter and a second filtering pipeline, wherein a second solution inlet, a second solution outlet, a second flushing inlet and a second flushing outlet are formed in the outer wall surface of the second filter, the second solution inlet and the second solution outlet are respectively connected to the outlet of the generation purification device and the liquid return port, the liquid storage tank, the first filter, the generation purification device and the second filter form a solution circulation loop, and two ends of the second filtering pipeline are respectively connected to the first solution outlet and the second flushing inlet and are communicated with the first filter and the second filter.
Further, a first control valve is arranged on the first filtering pipeline, and a second control valve is arranged between the outlet of the generation and purification equipment and the liquid return port.
Further, a third control valve is arranged on the second filtering pipeline, and a fourth control valve is arranged between the first solution outlet and the inlet of the generating and purifying device.
Further, the solution backheating generation purification system further comprises a controller, and the controller is electrically connected with the first control valve, the second control valve, the third control valve and the fourth control valve.
Further, the solution backheating generation purification system further comprises a filter pressing device, the filter pressing device comprises a stock solution inlet and a liquid outlet, the first flushing outlet and the second flushing outlet are both connected with the liquid inlet, the liquid outlet is connected with the liquid storage tank, and the filter pressing device is communicated with the first filter, the second filter and the liquid storage tank.
Further, the generating and purifying device comprises a heat exchange device, a generating device and a separating device, wherein a cold liquid inlet, a cold liquid outlet, a hot liquid inlet and a hot liquid outlet are formed on the outer wall surface of the heat exchange device, the cold liquid inlet is connected with the first solution outlet, the cold liquid outlet is connected with the inlet of the generating device, the outlet of the generating device is connected with the separating device, the hot liquid inlet is connected with the separating device, the hot liquid outlet is connected with the second solution inlet, and a solution circulation loop is formed between the liquid storage tank, the first filter, the heat exchange device, the generating device, the separating device and the second filter.
Further, the solution backheating generation purification system further comprises a first liquid pump and a second liquid pump, the first liquid pump and the second liquid pump are both arranged on the solution circulation loop, two ends of the first liquid pump are respectively connected with the liquid outlet and the first solution inlet, and two ends of the second liquid pump are respectively connected with the separation device and the cold liquid inlet.
Further, the solution backheating generation purification system further comprises a controller, and the controller is electrically connected with the first liquid pump and the second liquid pump.
The invention has the beneficial effects that: the solution flowing to the purifying equipment can be filtered through the first filter, so that the purifying effect of the solution in the solution circulation loop is realized, and the blocking phenomenon of the solution circulation loop is effectively avoided. Meanwhile, the first filter is flushed and cleaned by utilizing the flowing of the solution through the first filtering pipeline, so that the operation is very convenient, and long-term shutdown and disassembly maintenance are not required.
Drawings
Fig. 1 is a schematic structural diagram of a solution backheating generation purification system according to an embodiment of the present invention.
Reference numerals illustrate:
liquid storage tank 1
Liquid outlet 11
Liquid return port 12
The purification apparatus 2 takes place
Heat exchanging device 21
Cold liquid inlet 211
Cold liquid outlet 212
Hot liquid inlet 213
Hot liquid outlet 214
Generating device 22
Separation device 23
First filter 3
First solution inlet 31
First solution outlet 32
First flushing inlet 33
First flushing outlet 34
First filter tube 4
First control valve 41
Second control valve 42
Second filter 5
A second solution inlet 51
Second solution outlet 52
A second flushing inlet 53
Second flushing outlet 54
Second filter tube 6
Third control valve 61
Fourth control valve 62
Filter press device 7
Stock solution inlet 71
Liquid drain port 72
First liquid pump 8
Second liquid pump 9
Detailed Description
The following description of embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced.
As shown in fig. 1, this embodiment discloses a solution regeneration generation and purification system, the solution regeneration generation and purification system includes a liquid storage tank 1, a generation and purification device 2, a first filter 3 and a first filtering pipeline 4, the liquid storage tank 1 includes a liquid outlet 11 and a liquid return port 12, the outer wall surface of the first filter 3 is provided with a first solution inlet 31, a first solution outlet 32, a first flushing inlet 33 and a first flushing outlet 34, the first solution inlet 31 is connected to the liquid outlet 11, the first solution outlet 32 is connected to the inlet of the generation and purification device 2, the outlet of the generation and purification device 2 is connected to the liquid return port 12, and the liquid storage tank 1, the first filter 3 and the generation and purification device 2 are formed with a solution circulation loop, and two ends of the first filtering pipeline 4 are respectively connected to the outlet of the generation and purification device 2 and the first flushing inlet 33 and are communicated with the generation and purification device 2 and the first filter 3.
Solution is stored in the liquid storage tank 1, after the solution is discharged out of the liquid storage tank 1 through the liquid outlet 11, the solution enters the first filter 3 through the first solution inlet 31 to be filtered, solid impurities and the like fall to the bottom in the first filter 3, clear liquid is discharged out of the first filter 3 through the first solution outlet 32 at the top, the filtered solution enters the generating purifying equipment 2 to perform heat exchange, generating and purifying effects, and then the solution is returned into the liquid storage tank 1 through the liquid return port 12 and is recycled through the solution circulation loop. The solution flowing to the generation purification equipment 2 can be filtered through the first filter 3, so that the purification effect of the solution in the solution circulation loop is realized, and the blockage phenomenon of the solution circulation loop caused by the fact that solid particles enter the generation purification equipment 2 is effectively avoided. Meanwhile, when the first filter 3 is washed, the solution discharged by the purifying device 2 enters the first filtering pipeline 4, the solution in the first filtering pipeline 4 enters the bottom of the first filter 3 through the first washing inlet 33 for washing, and the solid impurities at the bottom of the first filter 3 are discharged through the first washing outlet 34, so that the washing and cleaning of the first filter 3 are realized. The first filter 3 is flushed and cleaned by the solution flowing through the first filtering pipeline 4, so that the operation is very convenient, and long-term shutdown and disassembly maintenance are not needed.
The first filter pipe 4 is provided with a first control valve 41, and a second control valve 42 is provided between the outlet of the purifying device 2 and the liquid return port 12. When the solution backheating generation purification system is used, the first control valve 41 is closed, the second control valve 42 is opened, and the solution discharged by the generation purification equipment 2 flows to the liquid return port 12 and returns to the liquid storage tank 1, so that the solution circularly flows in a solution circulation loop; when the solution backheating generation purification system needs to flush the first filter 3, the first control valve 41 is opened, the second control valve 42 is closed, and the solution discharged by the generation purification device 2 enters the first filter 3 through the first filter pipeline 4 for flushing. The operation and the use are very convenient, and the structure is simple.
The solution backheating generation purification system further comprises a second filter 5 and a second filter pipeline 6, wherein a second solution inlet 51, a second solution outlet 52, a second flushing inlet 53 and a second flushing outlet 54 are formed in the outer wall surface of the second filter 5, the second solution inlet 51 and the second solution outlet 52 are respectively connected to the outlet of the generation purification device 2 and the liquid return port 12, a solution circulation loop is formed by the liquid storage tank 1, the first filter 3, the generation purification device 2 and the second filter 5, and two ends of the second filter pipeline 6 are respectively connected to the first solution outlet 32 and the second flushing inlet 53 and are communicated with the first filter 3 and the second filter 5.
The solution discharged by the purification equipment 2 enters the second filter 5 through the second solution inlet 51, solid impurities and the like fall to the bottom in the second filter 5, clear liquid is discharged out of the second filter 5 through the second solution outlet 52 at the top, the filtered solution returns to the liquid storage tank 1 through the liquid return port 12, the solution discharged by the purification equipment 2 can be filtered through the second filter 5, and the blockage phenomenon of a solution circulation loop caused by solid particles entering into the liquid storage tank 1 is effectively avoided. Meanwhile, when the second filter 5 is washed, the solution discharged from the first solution outlet 32 in the first filter 3 enters the second filter pipeline 6, the solution in the second filter pipeline 6 enters the bottom of the second filter 5 through the second washing inlet 53 for washing, and the solid impurities at the bottom of the second filter 5 are discharged through the second washing outlet 54, so that the second filter 5 is washed and cleaned. The second filter 5 is flushed and cleaned by the solution flowing through the second filtering pipeline 6, so that the operation is very convenient, and long-term shutdown and disassembly maintenance are not needed.
The second filter pipe 6 is provided with a third control valve 61, and a fourth control valve 62 is provided between the first solution outlet 32 and the inlet of the purifying device 2. When the solution backheating generation purification system is in use, the third control valve 61 is closed, the fourth control valve 62 is opened, and the solution discharged from the first filter 3 flows into the generation purification device 2, so that the solution circularly flows in the solution circulation loop; when the solution backheating generation purification system needs to flush the second filter 5, the third control valve 61 is opened, the fourth control valve 62 is closed, and the solution discharged from the first filter 3 enters the second filter 5 through the second filter pipeline 6 for flushing. The operation and the use are very convenient, and the structure is simple.
The solution backheating generation purification system further comprises a controller electrically connected to the first control valve 41, the second control valve 42, the third control valve 61 and the fourth control valve 62. The controller can respectively control the opening and closing of the first control valve 41, the second control valve 42, the third control valve 61 and the fourth control valve 62, realizes automatic control management, and is convenient to operate and use.
The solution backheating generation purification system further comprises a filter pressing device 7, the filter pressing device 7 comprises a stock solution inlet 71 and a liquid outlet 72, the first flushing outlet 34 and the second flushing outlet 54 are both connected to the liquid inlet, the liquid outlet 72 is connected to the liquid storage tank 1, and the filter pressing device 7 is communicated with the first filter 3, the second filter 5 and the liquid storage tank 1. The solution with filter residues filtered by the first filter 3 is discharged from the first flushing outlet 34 through flushing, the solution enters the filter pressing device 7 through the stock solution inlet 71, the solution with filter residues filtered by the second filter 5 is discharged from the second flushing outlet 54 through flushing, and the solution enters the filter pressing device 7 through the stock solution inlet 71. The liquid outlet 72 is connected to the liquid return port 12 of the liquid storage tank 1 and is communicated with the liquid storage tank 1, the solution is subjected to filter pressing concentration through the filter pressing device 7, the filter pressed solution is discharged out of the filter pressing device 7 through the liquid outlet 72, and then flows back into the liquid storage tank 1 through the liquid return port 12, so that the recycling is realized, and the cost is saved.
The generating and purifying device 2 comprises a heat exchange device 21, a generating device 22 and a separating device 23, wherein a hot liquid inlet 213, a hot liquid outlet 214, a cold liquid inlet 211 and a cold liquid outlet 212 are arranged on the outer wall surface of the heat exchange device 21, the cold liquid inlet 211 is connected with the first solution outlet 32, the cold liquid outlet 212 is connected with the inlet of the generating device 22, the outlet of the generating device 22 is connected with the separating device 23, the hot liquid inlet 213 is connected with the separating device 23, the hot liquid outlet 214 is connected with the second solution inlet 51, and a solution circulation loop is formed among the liquid storage tank 1, the first filter 3, the heat exchange device 21, the generating device 22, the separating device 23 and the second filter 5.
The solution in the first filter 3 is discharged through the first solution outlet 32, then enters the heat exchange device 21 through the cold solution inlet 211 and is discharged out of the heat exchange device 21 through the cold solution outlet 212, the solution enters the generating device 22 again, the solution is heated in the generating device 22 and then enters the separating device 23, the high-temperature solution is subjected to gas-liquid separation in the separating device 23, the water vapor is recycled through the top of the separating device 23, the water saving effect is achieved, the high-temperature solution at the bottom of the separating device 23 is discharged, the high-temperature solution enters the heat exchange device 21 through the hot solution inlet 213 and is discharged out of the heat exchange device 21 through the hot solution outlet 214, the high-temperature solution entering the heat exchange device 21 through the hot solution inlet 213 and the solution entering the heat exchange device 21 through the cold solution inlet 211 are subjected to heat transfer, the solution through the hot solution outlet 214 is cooled, the solution through the cold solution outlet 212 is heated, the heat of the high-temperature solution reaches the heat recycling of the high-temperature solution, and the energy is greatly saved. The solution needs to be heated by a heat source in the generating device 22, and the heat source can be steam generation, electric heating generation, gas hot air generation and high-temperature flue gas generation. The solution in the solution circulation loop can be water, inorganic salt solution and other liquid fluid, and can be particularly a solution crystallization or corrosive medium with high viscosity.
The solution backheating generation purification system further comprises a first liquid pump 8 and a second liquid pump 9, wherein the first liquid pump 8 and the second liquid pump 9 are arranged on the solution circulation loop, two ends of the first liquid pump 8 are respectively connected with the liquid outlet 11 and the first solution inlet 31, and two ends of the second liquid pump 9 are respectively connected with the separation device 23 and the cold liquid inlet 211. The pressure of the solution is increased through the first liquid pump 8 and the second liquid pump 9, normal operation of the solution circulation loop is guaranteed, circulation operation of the solution circulation loop is quickened, and efficiency of the solution backheating generation purification system is improved.
Wherein the controller is electrically connected to the first liquid pump 8 and the second liquid pump 9. The controller is used for respectively controlling the switch and the output power of the first liquid pump 8 and the second liquid pump 9, so that automatic control management is realized, and the operation and the use are convenient.
When the solution backheating generation purification system of the embodiment is normally used, the first filter 3 and the second filter 5 filter the solution in the solution circulation loop, so that the purification effect of the solution is realized, and the blocking phenomenon is effectively avoided. When the solution backheating generation purification system needs to flush the first filter 3, the first control valve 41 is opened, the second control valve 42, the third control valve 61 and the fourth control valve 62 are closed, the first liquid pump 8 is closed, the second liquid pump 9 is opened, the solution in the generation purification device 2 flows to the first filter pipeline 4, and flows into the first filter 3 through the first flushing inlet 33, so that the back flushing cleaning operation can be realized in the first filter 3, the back flushing cleaning operation is quick and convenient to operate, long-term shutdown is not needed, and disassembly and maintenance are not needed. When the solution backheating generation and purification system needs to flush the second filter 5, the third control valve 61 is opened, the first control valve 41, the second control valve 42 and the fourth control valve 62 are closed, the first liquid pump 8 is opened, the second liquid pump 9 is closed, the solution in the liquid storage tank 1 flows to the second filter pipeline 6 through the first filter 3, and flows into the second filter 5 through the second flushing inlet 53, so that the back flushing cleaning operation can be realized in the second filter 5, the back flushing cleaning operation is quick and convenient to operate, long-term shutdown is not needed, and disassembly and maintenance are not needed.
The solution backheating generation purification system of this embodiment was tested. In normal use, the solution passing through the liquid outlet 11 is CaCl 2 The temperature of the solution is 70 ℃ and the flow is 50m 3 And/h, the concentration is 40%, the solution is fed into the first filter 3 through the first liquid pump 8, filtered by the first filter 3, then enters the heat exchange device 21 through the cold liquid inlet 211, the temperature of the solution discharged through the cold liquid outlet 212 is increased to 110 ℃, and the solution enters the generating device22, the temperature is further increased to 125 ℃, the high-temperature solution after the temperature rise is subjected to steam-water separation by the separation device 23, 5t/h of steam is separated from the top of the separation device 23, and 46m of steam is separated from the top of the separation device 23 3 The high-temperature solution of/h is discharged through the separation device 23 and then sequentially enters the heat exchange device 21 through the second liquid pump 9 and the hot liquid inlet 213, the temperature of the solution passing through the hot liquid outlet 214 after heat transfer is reduced to 75 ℃, and the solution passes through the second filter 5 and then returns to the liquid storage tank 1 through the liquid return port 12, so that the recycling of the solution is realized. The solution regeneration generation purification system realizes the purification effect of the solution through the first filter 3 and the second filter 5, and can realize the purification of 0.5 kg/day of solid particles.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (5)
1. The solution backheating generation purification system comprises a liquid storage tank and generation purification equipment, wherein the liquid storage tank comprises a liquid outlet and a liquid return port, and is characterized by further comprising a first filter and a first filtering pipeline, wherein a first solution inlet, a first solution outlet, a first flushing inlet and a first flushing outlet are formed in the outer wall surface of the first filter, the first solution inlet is connected with the liquid outlet, the first solution outlet is connected with the inlet of the generation purification equipment, the outlet of the generation purification equipment is connected with the liquid return port, the liquid storage tank, the first filter and the generation purification equipment form a solution circulation loop, and two ends of the first filtering pipeline are respectively connected with the outlet of the generation purification equipment and the first flushing inlet and are communicated with the generation purification equipment and the first filter;
the solution backheating generation purification system further comprises a second filter and a second filtering pipeline, wherein a second solution inlet, a second solution outlet, a second flushing inlet and a second flushing outlet are formed in the outer wall surface of the second filter, the second solution inlet and the second solution outlet are respectively connected to the outlet of the generation purification device and the liquid return port, the liquid storage tank, the first filter, the generation purification device and the second filter form a solution circulation loop, and two ends of the second filtering pipeline are respectively connected to the first solution outlet and the second flushing inlet and are communicated with the first filter and the second filter;
the solution backheating generation purification system further comprises a filter pressing device, the filter pressing device comprises a stock solution inlet and a liquid outlet, the first flushing outlet and the second flushing outlet are both connected to the stock solution inlet, the liquid outlet is connected to the liquid storage tank, and the filter pressing device is communicated with the first filter, the second filter and the liquid storage tank;
the generation and purification equipment comprises a heat exchange device, a generation device and a separation device, wherein a cold liquid inlet, a cold liquid outlet, a hot liquid inlet and a hot liquid outlet are formed in the outer wall surface of the heat exchange device, the cold liquid inlet is connected with the first solution outlet, the cold liquid outlet is connected with the inlet of the generation device, the outlet of the generation device is connected with the separation device, the hot liquid inlet is connected with the separation device, the hot liquid outlet is connected with the second solution inlet, and a solution circulation loop is formed among the liquid storage tank, the first filter, the heat exchange device, the generation device, the separation device and the second filter;
the solution backheating generation purification system further comprises a first liquid pump and a second liquid pump, the first liquid pump and the second liquid pump are both arranged on the solution circulation loop, two ends of the first liquid pump are respectively connected with the liquid outlet and the first solution inlet, and two ends of the second liquid pump are respectively connected with the separation device and the cold liquid inlet.
2. The solution backheating generation purification system of claim 1, wherein a first control valve is provided on the first filter tube, and a second control valve is provided between the outlet of the generation purification device and the liquid return port.
3. The solution backheating generation purification system of claim 2, wherein a third control valve is provided on the second filter conduit, and a fourth control valve is provided between the first solution outlet and the inlet of the generation purification apparatus.
4. The solution back-heating generating purification system of claim 3, further comprising a controller electrically connected to the first control valve, the second control valve, the third control valve, and the fourth control valve.
5. The solution back-heating generating purification system of claim 1, further comprising a controller electrically connected to the first liquid pump and the second liquid pump.
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BE1018598A3 (en) * | 2010-01-25 | 2011-04-05 | Atlas Copco Airpower Nv | METHOD FOR RECYCLING ENRGIE. |
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CN101545194A (en) * | 2008-03-25 | 2009-09-30 | 三洋电机株式会社 | Solvent Purification Unit |
CN101871373A (en) * | 2010-05-28 | 2010-10-27 | 郑州大学 | Absorption Turbine Power Cooling Mixed Circulation System |
CN102847371A (en) * | 2012-10-18 | 2013-01-02 | 昆山威胜达环保设备有限公司 | Vacuum electrostatic oil filter |
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