CN216404318U - Water-saving emission-reducing acetylene gas cleaning system - Google Patents
Water-saving emission-reducing acetylene gas cleaning system Download PDFInfo
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- CN216404318U CN216404318U CN202122689295.6U CN202122689295U CN216404318U CN 216404318 U CN216404318 U CN 216404318U CN 202122689295 U CN202122689295 U CN 202122689295U CN 216404318 U CN216404318 U CN 216404318U
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Abstract
The utility model discloses a water-saving emission-reducing acetylene gas cleaning system which comprises a spray tower, a washing tower, a water ring compressor, a first cleaning tower and a second cleaning tower which are sequentially connected through pipelines, wherein a liquid outlet of the washing tower is communicated with a liquid inlet of a first cleaning solution storage tank, and a liquid outlet of the first cleaning solution storage tank is communicated with a liquid inlet of a first heat exchanger; the liquid outlet of the first heat exchanger is communicated with the liquid inlet of the water washing tower; a liquid outlet of the spray tower is communicated with a liquid inlet of a second washing liquid storage tank, a liquid outlet of the second washing liquid storage tank is communicated with a liquid inlet of a second heat exchanger, a liquid outlet of the second heat exchanger is communicated with a liquid inlet of the spray tower, and a liquid outlet of the second washing liquid storage tank is communicated with the aqueduct; the sodium hypochlorite storage tank is connected with the sodium hypochlorite elevated tank, the sodium hypochlorite elevated tank is connected with the second purifying tower, the second purifying tower is connected with the first purifying tower, and the first purifying tower is connected with the waste sodium hypochlorite recovery device.
Description
The technical field is as follows:
the utility model relates to the technical field of clean production and water resource recycling, in particular to a water-saving and emission-reducing acetylene gas cleaning system.
Background art:
the calcium carbide (calcium carbide CaC) is used for producing polyvinyl chloride by calcium carbide method2) Generating acetylene gas (C) upon contact with water2H2) Synthesizing acetylene and hydrogen chloride (HCl) to prepare vinyl chloride monomer (CH)2CHCl) and then vinyl chloride is subjected to polymerization reaction to generate polyvinyl chloride, and the generated acetylene gas contains a small amount of impurities such as sulfide, phosphide and the like and needs to be introduced into a cleaning system for cleaning because the generated acetylene gas contains a small amount of impurities such as phosphine, hydrogen sulfide and the like; as shown in fig. 1, a sodium hypochlorite solution is prepared and then sequentially sent to a second purifying tower 5, a first purifying tower 4, a water washing tower 2 and a spray tower 1, crude acetylene gas sequentially enters the spray tower 1 and the water washing tower 2 and is sprayed, washed and cooled by a waste sodium hypochlorite solution, the crude acetylene gas is compressed to about 50kPa (gauge pressure) by a water ring compressor 3 and sequentially sent to the first purifying tower 4 and the second purifying tower 5 to remove impurities such as phosphine, hydrogen sulfide and the like in the crude acetylene gas, and the purified acetylene gas enters a neutralization tower and is neutralized by alkali liquor and then sent to a conversion synthesis process; the waste sodium hypochlorite solution cooled by the water washing tower 2 and the spray tower 1 is sent to a waste sodium hypochlorite recovery device 22.
In the production process of the suspension method polyvinyl chloride, the temperature of the acetylene gas can be changed along with the adjustment of the blanking and the water adding amount of the acetylene generator, when the temperature of the acetylene gas sent into the cleaning system is higher, a large amount of water vapor can be entrained in the acetylene gas, after the acetylene gas is washed by the sodium hypochlorite liquid and sprayed, the acetylene gas is cooled by the sodium hypochlorite liquid to become the acetylene gas with the large amount of water vapor entrained in the acetylene gasCondensed water, the condensed water and the waste sodium hypochlorite solution are mixed and then enter a waste sodium hypochlorite solution treatment unit with the volume of 100m3The waste sodium hypochlorite solution is recycled to the sodium hypochlorite preparation process by the acetylene gas cleaning system, and the waste sodium hypochlorite solution has the thickness of about 8.64m3The waste sodium hypochlorite solution can not be recycled, and the waste sodium hypochlorite solution has high contents of sulfur, phosphorus and the like and needs to be discharged after sewage treatment; because the excess water of the waste sodium hypochlorite mainly comes from the condensate water after spraying and washing, the excess waste sodium hypochlorite solution is subjected to sewage treatment, the treatment load of the waste sodium hypochlorite solution in the sodium hypochlorite process is increased, the sewage treatment cost is higher, the environmental protection pressure of a company is high, and the production cost of an enterprise is increased.
The utility model has the following contents:
the utility model aims to provide a water-saving emission-reducing acetylene gas cleaning system, which solves the problems of large treatment load of waste sodium hypochlorite, higher sewage treatment cost and large environmental protection pressure of companies.
The utility model is implemented by the following technical scheme: a water-saving emission-reducing acetylene gas cleaning system comprises a spray tower, a water washing tower, a water ring compressor, a first cleaning tower, a second cleaning tower, a first cleaning solution storage tank, a first heat exchanger, a second cleaning solution storage tank and a second heat exchanger which are sequentially connected through a gas pipeline; a liquid outlet of the first washing liquid storage tank is connected with a liquid inlet of the first heat exchanger through a circulating pump of the washing tower, a liquid outlet of the first heat exchanger is communicated with a liquid inlet of the washing tower, and a liquid outlet of the washing tower is communicated with a liquid inlet of the first washing liquid storage tank; a circulating water inlet of the first heat exchanger is connected with a circulating water inlet pipeline, and a circulating water outlet of the first heat exchanger is connected with a circulating water return pipeline;
a liquid outlet of the second washing liquid storage tank is communicated with a liquid inlet of the second heat exchanger, a liquid outlet of the second washing liquid storage tank is connected with a liquid inlet of the second heat exchanger through a spray tower circulating pump, a liquid outlet of the second heat exchanger is communicated with a liquid inlet of the spray tower, a liquid outlet of the spray tower is communicated with a liquid inlet of the second washing liquid storage tank, and a liquid outlet of the second washing liquid storage tank is communicated with the aqueduct through a second centrifugal pump; a circulating water inlet of the second heat exchanger is connected with the circulating water inlet pipeline, and a circulating water outlet of the second heat exchanger is connected with the circulating water return pipeline;
the liquid outlet of sodium hypochlorite storage tank passes through the sodium hypochlorite delivery pump and links to each other with the inlet of sodium hypochlorite elevated tank, the liquid outlet of sodium hypochlorite elevated tank with the inlet of second deterging tower communicates, the liquid outlet of second deterging tower pass through the deterging pump with the inlet of first deterging tower links to each other, the liquid outlet of first deterging tower and useless sodium hypochlorite recovery unit's inlet communicate.
Preferably, the liquid outlet of the first washing liquid storage tank is connected with the liquid inlet of the spray tower through a pipeline, and a first centrifugal pump is arranged on the pipeline connecting the liquid outlet of the first washing liquid storage tank with the liquid inlet of the spray tower.
Preferably, a first water replenishing pipeline is further arranged on the first washing liquid storage tank, and a second water replenishing pipeline is further arranged on the second washing liquid storage tank.
The utility model has the advantages that: after the acetylene gas cleaning system for water saving and emission reduction is used, crude acetylene is cooled through a spray tower and a water scrubber, water vapor carried in the crude acetylene becomes condensate water and finally enters a second washing liquid storage tank, a part of the condensate water in the second washing liquid storage tank is used for self circulation in the spray tower and the water scrubber, and the other part of the condensate water is finally conveyed to an acetylene generator for recycling; the waste sodium hypochlorite solution passing through the first cleaning tower is not mixed with the condensed water, and the waste sodium hypochlorite solution is directly conveyed to a waste sodium hypochlorite recovery system from the first cleaning tower, so that the discharged water amount of the waste sodium hypochlorite is effectively reduced, the treatment load of the waste sodium hypochlorite solution is reduced, the environmental protection pressure of a company is reduced, zero emission of an acetylene cleaning system is closer, the requirements of energy conservation and emission reduction policies advocated by the state are met, the pollution of sewage emission to the environment is reduced, and the method has great popularization significance.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a pre-modified acetylene cleaning system;
FIG. 2 is a schematic structural view of the present invention;
the device comprises a spray tower 1, a water washing tower 2, a water ring compressor 3, a first cleaning tower 4, a second cleaning tower 5, a first washing liquid storage tank 6, a first water replenishing pipeline 7, a first heat exchanger 8, a water washing tower circulating pump 9, a circulating water inlet pipeline 10, a circulating water return pipeline 11, a first centrifugal pump 12, a second washing liquid storage tank 13, a second water replenishing pipeline 14, a second heat exchanger 15, a spray tower circulating pump 16, a aqueduct 17, a second centrifugal pump 18, a sodium hypochlorite storage tank 19, a sodium hypochlorite conveying pump 20, a cleaning pump 21, a waste sodium hypochlorite recovery device 22 and a sodium hypochlorite head tank 23.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, the acetylene gas cleaning system capable of saving water and reducing emission comprises a spray tower 1, a water scrubber 2, a water ring compressor 3, a first cleaning tower 4 and a second cleaning tower 5 which are connected in sequence through gas pipelines; the gas outlet of spray column 1 passes through the gas pipeline with the air inlet of washing tower 2 and links to each other, and the gas outlet of washing tower 2 passes through the gas pipeline with the air inlet of water ring compressor 3 and links to each other, and the gas outlet of water ring compressor 3 passes through the gas pipeline with the air inlet of first detergent tower 4 and links to each other, and the gas outlet of first detergent tower 4 passes through the gas pipeline with the air inlet of second detergent tower 5 and links to each other.
Crude acetylene enters the spray tower 1 through the air inlet of the spray tower 1, and the crude acetylene discharged from the air outlet of the spray tower 1 enters the water washing tower 2 through the air inlet of the water washing tower 2, so that the crude acetylene is cooled; the crude acetylene discharged from the gas outlet of the water scrubber 2 enters the water ring compressor 3, the crude acetylene pressurized by the water ring compressor 3 enters the first cleaning tower 4 through the gas inlet of the first cleaning tower 4, the crude acetylene discharged from the gas outlet of the first cleaning tower 4 enters the second cleaning tower 5 through the gas inlet of the second cleaning tower 5, and the crude acetylene is discharged from the gas outlet of the second cleaning tower 5 to complete the cleaning process of the acetylene gas.
It also comprises a first washing liquid storage tank 6, a first heat exchanger 8, a second washing liquid storage tank 13 and a second heat exchanger 15; in the embodiment, the heat exchanger comprises two first heat exchangers 8 arranged in parallel and two second heat exchangers 15 arranged in parallel; a liquid outlet of the first washing liquid storage tank 6 is connected with a liquid inlet of the first heat exchanger 8 through a pipeline; a pipeline connecting a liquid outlet of the first washing liquid storage tank 6 with a liquid inlet of the first heat exchanger 8 is provided with a washing tower circulating pump 9, a liquid outlet of the first heat exchanger 8 is connected with a liquid inlet of the washing tower 2 through a pipeline, a liquid outlet of the washing tower 2 is connected with a liquid inlet of the first washing liquid storage tank 6 through a pipeline, and the first washing liquid storage tank 6 is also provided with a first water replenishing pipeline 7; the circulating water inlet of the first heat exchanger 8 is connected with a circulating water inlet pipeline 10, and the circulating water outlet of the first heat exchanger 8 is connected with a circulating water return pipeline 11.
The condensed water is led into a first washing liquid storage tank 6 through a first water supplementing pipeline 7, the condensed water is conveyed to a first heat exchanger 8 through a washing tower circulating pump 9, the condensed water is taken as a hot medium, the circulating water enters the first heat exchanger 8 through a circulating water inlet pipeline 10 and is discharged through a circulating water returning pipeline 11, the circulating water is taken as a cold medium, the circulating water exchanges heat with the condensed water, the cooled condensed water is conveyed to a liquid inlet of a washing tower 2 for spraying, the condensed water exchanges heat with crude acetylene entering the washing tower 2 in a counter-current manner to remove carbide slag impurities contained in the crude acetylene, simultaneously, the crude acetylene is cooled, the cooled crude acetylene enters a water ring compressor 3 through a pipeline, the condensed water formed by vapor carried by the crude acetylene and the condensed water after heat exchange flow back into the first washing liquid storage tank 6 through a pipeline, and a part of the condensed water in the first washing liquid storage tank 6 is used for circular washing, the quantity of the condensed water circulating in the water washing tower 2 and the first heat exchanger 8 in a closed manner is kept unchanged, so that the self-circulation cooling of the water washing tower 2 is realized.
The liquid outlet of the first washing liquid storage tank 6 is connected with the liquid inlet of the spray tower 1 through a pipeline, a first centrifugal pump 12 is arranged on the pipeline connecting the liquid outlet of the first washing liquid storage tank 6 with the liquid inlet of the spray tower 1, and the other part of redundant condensed water in the first washing liquid storage tank 6 is discharged to the liquid inlet of the spray tower 1 through the first centrifugal pump 12 for spraying.
A liquid outlet of the second washing liquid storage tank 13 is connected with a liquid inlet of the second heat exchanger 15 through a pipeline, a spray tower circulating pump 16 is arranged on the pipeline connecting the liquid outlet of the second washing liquid storage tank 13 with the liquid inlet of the second heat exchanger 15, the liquid outlet of the second heat exchanger 15 is connected with a liquid inlet of the spray tower 1 through a pipeline, the liquid outlet of the spray tower 1 is connected with the liquid inlet of the second washing liquid storage tank 13 through a pipeline, and a second water replenishing pipeline 14 is also arranged on the second washing liquid storage tank 13; and a circulating water inlet of the second heat exchanger 15 is connected with the circulating water inlet pipeline 10, and a circulating water outlet of the second heat exchanger 15 is connected with the circulating water return pipeline 11.
Condensed water passing through a washing tower 2 and a first washing liquid storage tank 6 enters a spraying tower 1 for spraying, the condensed water and crude acetylene introduced into the spraying tower 1 perform countercurrent heat exchange to remove carbide slag impurities contained in the crude acetylene and simultaneously cool the crude acetylene, the cooled crude acetylene enters the washing tower 2 through a pipeline, the condensed water formed after cooling water vapor carried by acetylene gas and the condensed water after heat exchange enter a second washing liquid storage tank 13 through a liquid outlet of the spraying tower 1, a large amount of condensed water is introduced into the second washing liquid storage tank 13 while the condensed water is introduced into the first washing liquid storage tank 6, a part of the condensed water is conveyed to a second heat exchanger 15 through a circulating pump 16 of the spraying tower, the condensed water is used as a hot medium, the circulating water enters the second heat exchanger 15 through a circulating water inlet pipeline 10 and is discharged through a circulating water return pipeline 11, and the circulating water is used as a cold medium, and the condensed water exchanges heat with the circulating water, and the cooled condensed water enters the spray tower 1 again for spraying for circulating washing, so that the self-circulation cooling of the spray tower 1 is realized.
A liquid outlet of the second washing liquid storage tank 13 is connected with the aqueduct 17 through a pipeline, a second centrifugal pump 18 is arranged on the pipeline connecting the liquid outlet of the second washing liquid storage tank 13 with the aqueduct 17, and the other part of redundant condensed water in the second washing liquid storage tank 13 is discharged to the aqueduct 17 through the second centrifugal pump 18 and is conveyed to the acetylene generator for recycling.
The liquid outlet of sodium hypochlorite storage tank 19 passes through the pipeline with the inlet of sodium hypochlorite elevated tank 23 and links to each other, be equipped with sodium hypochlorite delivery pump 20 on the pipeline that the liquid outlet of sodium hypochlorite storage tank 19 links to each other with the inlet of sodium hypochlorite elevated tank 23, the liquid outlet of sodium hypochlorite elevated tank 23 passes through the pipeline with the inlet of second cleaning tower 5 and links to each other, the liquid outlet of second cleaning tower 5 passes through the pipeline with the inlet of first cleaning tower 4 and links to each other, be equipped with cleaning pump 21 on the pipeline that the liquid outlet of second cleaning tower 5 and the inlet of first cleaning tower 4 link to each other, the liquid outlet of first cleaning tower 4 passes through the pipeline with useless sodium hypochlorite recovery unit 22 and links to each other.
Prepare fresh sodium hypochlorite solution in sodium hypochlorite storage tank 19, sodium hypochlorite solution after preparing is penetrated into sodium hypochlorite elevated tank 23 through sodium hypochlorite delivery pump 20, then sodium hypochlorite solution flows into second cleaning tower 5 by itself, throw into the inlet of first cleaning tower 4 at last and spray, sodium hypochlorite solution that gets into first cleaning tower 4 contacts with the crude acetylene that gets into first cleaning tower 4, detach hydrogen sulfide, the phosphine impurity in the crude acetylene, sodium hypochlorite solution that gets into second cleaning tower 5 contacts with the crude acetylene that gets into in second cleaning tower 5 once more, thoroughly detach hydrogen sulfide in the crude acetylene, the phosphine impurity, clean acetylene gas gets into next process, waste sodium hypochlorite solution is carried to waste sodium hypochlorite recovery unit 22 through the pipeline.
After the acetylene gas cleaning system for water saving and emission reduction is used, crude acetylene is cooled through the spray tower 1 and the water scrubber 2, water vapor carried in the crude acetylene becomes condensed water and finally enters the second washing liquid storage tank 13, a part of the condensed water in the second washing liquid storage tank 13 is used for self circulation in the spray tower 1 and the water scrubber 2, and the other part of the condensed water is finally conveyed to the acetylene generator for reuse; the waste sodium hypochlorite solution passing through the first cleaning tower 4 is not mixed with the condensed water, and the waste sodium hypochlorite solution is directly conveyed to a waste sodium hypochlorite recovery system from the first cleaning tower 4, so that the discharged water amount of the waste sodium hypochlorite is effectively reduced, the treatment load of the waste sodium hypochlorite solution is reduced, the environmental protection pressure of a company is reduced, zero emission of an acetylene cleaning system is closer, the requirements of energy conservation and emission reduction policies advocated by the state are met, the pollution of sewage emission to the environment is reduced, and the method has great popularization significance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A water-saving emission-reducing acetylene gas cleaning system comprises a spray tower, a water washing tower, a water ring compressor, a first cleaning tower and a second cleaning tower which are sequentially connected through a gas pipeline, and is characterized by further comprising a first cleaning solution storage tank, a first heat exchanger, a second cleaning solution storage tank and a second heat exchanger; a liquid outlet of the first washing liquid storage tank is connected with a liquid inlet of the first heat exchanger through a circulating pump of the washing tower, a liquid outlet of the first heat exchanger is communicated with a liquid inlet of the washing tower, and a liquid outlet of the washing tower is communicated with a liquid inlet of the first washing liquid storage tank; a circulating water inlet of the first heat exchanger is connected with a circulating water inlet pipeline, and a circulating water outlet of the first heat exchanger is connected with a circulating water return pipeline;
a liquid outlet of the second washing liquid storage tank is communicated with a liquid inlet of the second heat exchanger, a liquid outlet of the second washing liquid storage tank is connected with a liquid inlet of the second heat exchanger through a spray tower circulating pump, a liquid outlet of the second heat exchanger is communicated with a liquid inlet of the spray tower, a liquid outlet of the spray tower is communicated with a liquid inlet of the second washing liquid storage tank, and a liquid outlet of the second washing liquid storage tank is communicated with the aqueduct through a second centrifugal pump; a circulating water inlet of the second heat exchanger is connected with the circulating water inlet pipeline, and a circulating water outlet of the second heat exchanger is connected with the circulating water return pipeline;
the liquid outlet of sodium hypochlorite storage tank passes through the sodium hypochlorite delivery pump and links to each other with the inlet of sodium hypochlorite elevated tank, the liquid outlet of sodium hypochlorite elevated tank with the inlet of second deterging tower communicates, the liquid outlet of second deterging tower pass through the deterging pump with the inlet of first deterging tower links to each other, the liquid outlet of first deterging tower and useless sodium hypochlorite recovery unit's inlet communicate.
2. The water-saving emission-reducing acetylene gas cleaning system according to claim 1, wherein a liquid outlet of the first washing liquid storage tank is connected with a liquid inlet of the spray tower through a pipeline, and a first centrifugal pump is arranged on the pipeline connecting the liquid outlet of the first washing liquid storage tank with the liquid inlet of the spray tower.
3. The water-saving emission-reducing acetylene gas cleaning system according to claim 1, wherein a first water replenishing pipeline is further provided on the first cleaning liquid storage tank, and a second water replenishing pipeline is further provided on the second cleaning liquid storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122689295.6U CN216404318U (en) | 2021-11-04 | 2021-11-04 | Water-saving emission-reducing acetylene gas cleaning system |
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| CN202122689295.6U CN216404318U (en) | 2021-11-04 | 2021-11-04 | Water-saving emission-reducing acetylene gas cleaning system |
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| CN202122689295.6U Active CN216404318U (en) | 2021-11-04 | 2021-11-04 | Water-saving emission-reducing acetylene gas cleaning system |
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