CN105600857A - Degassing treatment technology of alkaline wastewater in viscose fiber production - Google Patents
Degassing treatment technology of alkaline wastewater in viscose fiber production Download PDFInfo
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- CN105600857A CN105600857A CN201510686965.5A CN201510686965A CN105600857A CN 105600857 A CN105600857 A CN 105600857A CN 201510686965 A CN201510686965 A CN 201510686965A CN 105600857 A CN105600857 A CN 105600857A
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Abstract
A degassing treatment technology of alkaline wastewater in viscose fiber production comprises the following steps: injecting alkaline wastewaters with different sources in the viscose fiber production to different storage tanks; using a vacuum degassing system to make the wastewater enter a degassing tank through self suction under the action of vacuum, and realizing evaporation in the degassing tank; allowing evaporated gases to enter a condenser under the action of a water ring vacuum pump, and cooling; discharging condensed water in the condenser to the storage tanks, and discharging uncondensed gases to a waste gas recovery system through the water ring vacuum pump; and discharging condensed water in the degassing tank to a sewage plant. The alkaline wastewater treatment technology can solve the problems of high energy consumption and large waste gas volume of present sewage aeration technologies, allows low-gas volume and high-concentration waste gases obtained after sewage treatment to be recovered, and does not increase the load or the running cost of the waste gas recovery system basically.
Description
Technical field
The present invention relates to a kind of to H contained in the alkaline waste water producing in viscose staple fiber production process2S、CS2The method that gas reclaims, specifically carries out Fruit storage to alkaline waste water centralized collection, by the H containing in water2S、CS2Pernicious gas is deviate from, and the process that the gas of deviating from is reclaimed.
Background technology
At present, viscose glue industry does not have basic effective measures to the processing of this part waste water both at home and abroad, and the measure that most domestic producer adopts is: in Sewage Plant, the sewage of collecting is concentrated and carried out Air Exposure, the H in the waste gas exposing2S enters caustic washing system and reclaims, and contains a large amount of CS2Tail gas through exhaust tower high altitude discharge, CS2Emptyingly not only caused wastage of material, but also cause environmental pollution. Along with country is more and more higher to environmental protection, energy-conservation requirement, viscose rayon industry face by the right-about that is growth pattern, enterprise will be to technology, environmental protection, the development of benefit type.
Therefore the waste gas containing in sewage is reclaimed and has economic benefit and social benefit. After sewage aeration, air quantity is very large, if this part waste gas directly taps into gas recovery system, waste gas recovering device need to increase corresponding corollary apparatus, and investment and operating cost increase.
Summary of the invention
The present invention is directed to existing sewage aeration technique, operating cost is high, and waste gas air quantity is too large, containing CS2Waste gas directly discharge, cause wastage of material and environmental pollution, it is carried out to the practical problems such as recovery difficult is large, provide one can ensure degassing efficiency, can effectively reduce again the waste water treatment process of waste gas air quantity.
The technical solution adopted in the present invention is: a kind of viscose rayon is produced the degassed treatment process of neutral and alkali waste water, and this treatment process adopts vacuum outgas system to complete, and whole processing procedure is carried out according to following steps:
A, the incoming road difference of producing neutral and alkali waste water according to viscose rayon, be injected in different holding vessels for subsequent use;
B, vacuum outgas system comprise water ring vacuum pump, degassing tank and condenser, and wherein water ring vacuum pump, degassing tank and condenser are series connection setting; Water ring vacuum pump is extracted the air in degassing tank and condenser out, the two keeps vacuum state, make waste water self-priming under vacuum action enter degassing tank, and realize evaporation in degassing tank: the gas evaporating enters condenser and carries out cooling under Water-ring vacuum pumping action; Condensed water elimination in condenser is to stand-by in holding vessel, and on-condensible gas enters gas recovery system by water ring vacuum pump; Condensed water elimination in degassing tank is to Sewage Plant.
The vacuum keeping in degassing tank and condenser is 90-200mbar.
Alkaline waste water comprises the water ring pump draining in the draining of carbon disulfide condensation recycle section, stoste and the workshop, acid station spun between practice, and water temperature is 48-61 DEG C.
Holding vessel comprises the first holding vessel, the second holding vessel and the 3rd holding vessel; The second holding vessel is connected with water ring vacuum pump and condenser respectively by pipeline, and the carbon disulfide condensation recycle section draining of spinning between practice is admitted in the first holding vessel, as main processing waste water; The first holding vessel is connected with water ring vacuum pump, condenser and degassing tank respectively by pipeline, and the water ring pump draining in stoste and workshop, acid station is admitted in the second holding vessel, as the sealing water of water ring vacuum pump and the condensed water of condenser; The 3rd holding vessel is connected with degassing tank.
Compared with prior art, this alkaline waste water treatment process disclosed in this invention can solve the difficult problem that existing sewage aeration process energy consumption is high, waste gas air quantity is large, low air quantity after sewage disposal, the waste gas of high concentration can be reclaimed, gas recovery system load and operating cost can not increase substantially.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described.
Adopt vacuum degassing process to containing H2S、CS2High concentration alkali wastewater concentrate degassedly, the high-concentration waste gas of deviating from is reclaimed to the rate of recovery >=80%. Concrete measure is as follows.
A, the incoming road difference of producing neutral and alkali waste water according to viscose rayon, be injected in different holding vessels for subsequent use: the carbon disulfide condensation recycle section draining of spinning between practice is delivered to the first holding vessel by efflux pump, and this first holding vessel is alkaline waste water collecting tank; The water ring pump draining in stoste and workshop, acid station is recycled to the second holding vessel by gravity flow, first use as condensed water and the Water-ring vacuum pump seal water of vacuum outgas system, the condenser using and the draining of water ring vacuum pump enter the first holding vessel again, with spin between practice after draining mixes, carry out Fruit storage, waste water total amount 250-330m3/ h, water temperature 48-61 DEG C.
B, vacuum outgas system are made up of degassing tank, condenser, water ring vacuum pump, in the present embodiment, have installed two groups of water ring vacuum pumps additional. Water-ring vacuum series connection of pumps condenser and degassing tank, degas system is in the time of normal operation, and water ring vacuum pump is extracted the air in condenser and degassing tank equipment out, thereby makes system keep the vacuum state of 90-200mbar. Alkaline waste water in above-described the first holding vessel enters the degassing tank of degas system by vacuum self-priming, due to vacuum action, violent evaporation occurs in degassing tank, containing water vapor, air and the H of 1.8-2.5t/h2S、CS2Mist be distilled out of. The mist steaming enters condenser under Water-ring vacuum pumping action, and now, the water in the second holding vessel is centrifuged pump and is delivered to water ring vacuum pump and the condenser inlet of degas system, uses as the sealing water of water ring vacuum pump and the condensed water of condenser. In condenser, the direct heat convection of condensed water and mist, the steam containing in mist is condensed, and is disposed to the first holding vessel together with condensed water, and Water-ring vacuum pump seal water is also disposed to the first holding vessel, is finally disposed in blowdown well. On-condensible gas in condenser is (containing air, H2S、CS2) enter gas recovery system by water ring vacuum pump. The overboard of degassing tank drains into sewage treatment plant through the 3rd holding vessel. The draining total amount 70-78m in the acid station in waste water and stoste workshop3/ h, mixed water temperature 27-32 DEG C, this part water water yield abundance, continuous, water temperature is low, first collects separately, uses as condensed water and the water ring pump sealing water of degas system, the draining using again with spin between practice draining and mix and carry out degassed processing, whole system does not increase new water consumption.
Alkaline waste water is after above-mentioned PROCESS FOR TREATMENT, and in the waste gas of deviating from, fixed gas gas gross is: H2S≥25kg/h、CS2>=65kg/h, degassing efficiency reaches >=and 80%. Alkaline waste water after degassed drains into Sewage Plant needn't carry out Air Exposure again. Degas system condensed water and pump seal water are all that whole alkaline water treatment system no longer increases new water consumption with the draining in stoste, workshop, acid station.
Claims (4)
1. viscose rayon is produced a degassed treatment process for neutral and alkali waste water, and this treatment process adopts vacuum outgas system to complete, and it is characterized in that, whole processing procedure is carried out according to following steps:
A, the incoming road difference of producing neutral and alkali waste water according to viscose rayon, be injected in different holding vessels for subsequent use;
B, vacuum outgas system comprise water ring vacuum pump, degassing tank and condenser, and wherein water ring vacuum pump, degassing tank and condenser are series connection setting; Water ring vacuum pump is extracted the air in degassing tank and condenser out, the two keeps vacuum state, make waste water self-priming under vacuum action enter degassing tank, and realize evaporation in degassing tank: the gas evaporating enters condenser and carries out cooling under Water-ring vacuum pumping action; Condensed water elimination in condenser is to stand-by in holding vessel, and on-condensible gas enters gas recovery system by water ring vacuum pump; Condensed water elimination in degassing tank is to Sewage Plant.
2. viscose rayon according to claim 1 is produced the degassed treatment process of neutral and alkali waste water, it is characterized in that, the vacuum keeping in degassing tank and condenser is 90-200mbar.
3. viscose rayon according to claim 1 is produced the degassed treatment process of neutral and alkali waste water, it is characterized in that, described alkaline waste water comprises the water ring pump draining in the draining of carbon disulfide condensation recycle section, stoste and the workshop, acid station spun between practice, and water temperature is 48-61 DEG C.
4. viscose rayon according to claim 3 is produced the degassed treatment process of neutral and alkali waste water, it is characterized in that, holding vessel comprises the first holding vessel, the second holding vessel and the 3rd holding vessel; The second holding vessel is connected with water ring vacuum pump and condenser respectively by pipeline, and the carbon disulfide condensation recycle section draining of spinning between practice is admitted in the first holding vessel, as main processing waste water; The first holding vessel is connected respectively at water ring vacuum pump, condenser and degassing tank by pipeline, and the water ring pump draining in stoste and workshop, acid station is admitted in the second holding vessel, as the sealing water of water ring vacuum pump and the condensed water of condenser; The 3rd holding vessel is connected with degassing tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510686965.5A CN105600857B (en) | 2015-10-22 | 2015-10-22 | The vacuum degasing pretreatment of viscose rayon production neutral and alkali waste water |
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| CN201510686965.5A CN105600857B (en) | 2015-10-22 | 2015-10-22 | The vacuum degasing pretreatment of viscose rayon production neutral and alkali waste water |
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| CN105600857B CN105600857B (en) | 2019-03-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219586A1 (en) * | 2016-06-25 | 2017-12-28 | 南通神马线业有限公司 | Degassing method in spinning bath for viscose fiber production |
| CN115159610A (en) * | 2022-06-24 | 2022-10-11 | 唐山三友集团兴达化纤有限公司 | Efficient separation tower and system and method for purifying wastewater containing carbon disulfide |
| CN115323807A (en) * | 2022-08-11 | 2022-11-11 | 浙江怡丰印染有限公司 | Environment-friendly efficient chemical fiber fabric printing and dyeing process |
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| CN1186878A (en) * | 1997-10-13 | 1998-07-08 | 保定天鹅化纤集团有限公司 | Double effect intermittent cooling type degassing device and its use |
| CN1264316A (en) * | 1997-06-06 | 2000-08-23 | 德士古发展公司 | Black water flash and vapor recovery system |
| CN1264316C (en) * | 2003-08-29 | 2006-07-12 | 港湾网络有限公司 | Method for implementing verification and termination by connecting digital subscriber loop into hub |
| CN101274203A (en) * | 2007-12-27 | 2008-10-01 | 唐山三友集团兴达化纤有限公司 | Method for removing carbon disulfide gas in production process of viscose fiber |
| CN102100973A (en) * | 2011-02-10 | 2011-06-22 | 成都丽雅纤维股份有限公司 | Multistage evaporating process in viscose production |
| EP2522632A1 (en) * | 2011-05-12 | 2012-11-14 | Kopf Holding GmbH | Method for reducing and cleaning process waste water containing thiourea |
| CN103693794A (en) * | 2013-12-12 | 2014-04-02 | 内蒙古奥利星煤化集团有限责任公司 | Method for treating brine prepared through water dissolving and mining of underground sodium sulfate decahydrate |
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2015
- 2015-10-22 CN CN201510686965.5A patent/CN105600857B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264316A (en) * | 1997-06-06 | 2000-08-23 | 德士古发展公司 | Black water flash and vapor recovery system |
| CN1186878A (en) * | 1997-10-13 | 1998-07-08 | 保定天鹅化纤集团有限公司 | Double effect intermittent cooling type degassing device and its use |
| CN1264316C (en) * | 2003-08-29 | 2006-07-12 | 港湾网络有限公司 | Method for implementing verification and termination by connecting digital subscriber loop into hub |
| CN101274203A (en) * | 2007-12-27 | 2008-10-01 | 唐山三友集团兴达化纤有限公司 | Method for removing carbon disulfide gas in production process of viscose fiber |
| CN102100973A (en) * | 2011-02-10 | 2011-06-22 | 成都丽雅纤维股份有限公司 | Multistage evaporating process in viscose production |
| EP2522632A1 (en) * | 2011-05-12 | 2012-11-14 | Kopf Holding GmbH | Method for reducing and cleaning process waste water containing thiourea |
| CN103693794A (en) * | 2013-12-12 | 2014-04-02 | 内蒙古奥利星煤化集团有限责任公司 | Method for treating brine prepared through water dissolving and mining of underground sodium sulfate decahydrate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219586A1 (en) * | 2016-06-25 | 2017-12-28 | 南通神马线业有限公司 | Degassing method in spinning bath for viscose fiber production |
| CN115159610A (en) * | 2022-06-24 | 2022-10-11 | 唐山三友集团兴达化纤有限公司 | Efficient separation tower and system and method for purifying wastewater containing carbon disulfide |
| CN115323807A (en) * | 2022-08-11 | 2022-11-11 | 浙江怡丰印染有限公司 | Environment-friendly efficient chemical fiber fabric printing and dyeing process |
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| CN105600857B (en) | 2019-03-08 |
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