CN107198913A - Decahydronaphthalene washes recovery process in waste gas - Google Patents
Decahydronaphthalene washes recovery process in waste gas Download PDFInfo
- Publication number
- CN107198913A CN107198913A CN201610154940.5A CN201610154940A CN107198913A CN 107198913 A CN107198913 A CN 107198913A CN 201610154940 A CN201610154940 A CN 201610154940A CN 107198913 A CN107198913 A CN 107198913A
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- CN
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- Prior art keywords
- decahydronaphthalene
- waste gas
- recovery process
- water
- washes
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/11—Purification; Separation; Use of additives by absorption, i.e. purification or separation of gaseous hydrocarbons with the aid of liquids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/12—Purification; Separation; Use of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
Decahydronaphthalene washes recovery process in waste gas, reclaims the decahydronaphthalene in waste gas by the way of absorption is combined using washing, it is adaptable to the waste gas containing decahydronaphthalene that fibre spinning workshop is collected, belongs to environmental protection technical field.The decahydronaphthalene that waste gas containing decahydronaphthalene is directly entered in the gas distributor of washing tower bottom, waste gas, which is become trapped in washings, enters water scrubber bottom, and purified gas goes out-of-bounds further to handle after removing most of drop through wire mesh demister.Decahydronaphthalene in washings is removed using expanded graphite, activated carbon etc., the washings after purification are recycled to water scrubber, and the adsorbent of adsorption saturation is regenerated by the way of steam blowing or extruding, finally gives fluid product decahydronaphthalene.The technique is particularly suitable for the decahydronaphthalene waste gas containing dust and oxygen, compared with single absorption, membrane separation process, it is to avoid the problems such as dust blocking, oxygen are disturbed.
Description
Technical field
Decahydronaphthalene washes recovery process in waste gas, belongs to environmental protection technical field, primarily directed to the decahydronaphthalene mixed gas containing different compositions and concentration.
Background technology
High-performance polyethylene fibres are the basic materials for developing defence and military, Aero-Space, new energy and high-tech industry, while having extensive use in national economy fields such as building, communication, machinery, environmental protection.With the continuous lifting and the continuous expansion of application field of high-performance polyethylene fibres performance, high-performance polyethylene fibres spining technology is constantly taken seriously.During polyethylene fibre dry spinning, it is common to use swelling solvent be decahydronaphthalene, but in follow-up spinning, washing drawing-off, the process such as drying, the volatilization problems of decahydronaphthalene are serious.Because decahydronaphthalene belongs to flammable and explosive substance, system operation there are certain requirements to oxygen content, it is impossible to the solvent of volatilization is directly brought into system and handled, therefore decahydronaphthalene gas must be using recycling.Due to harmfulness and its higher economic value of the organic exhaust gas to environment, the processing of organic exhaust gas and the recovery of organic matter are paid much attention in countries in the world.The recycle and reuse of decahydronaphthalene solvent has become the key for restricting its dry technique.
The recovery technology of decahydronaphthalene mainly has absorption method, condensation method and membrane separation process etc..For middle and high concentration decahydronaphthalene organic exhaust gas, generally reclaimed by the way of compression condensation, for middle low concentration (100mg/m3~2000mg/m3) decahydronaphthalene organic exhaust gas, absorption method and embrane method are economic and effective recovery technologies.The recovery technology of volatile organic matter in the mixed gas that CN02137836 is announced, combine the methods such as compression, condensation, UF membrane, absorption, the rate of recovery of decahydronaphthalene is up to 95% ~ 99%, CN201210441822.4 is improved on this basis, after the condensed separation of logistics that spinning is come out, be divided into two loops, loop one is directly entered spinning system, loop 2 is compressed-condensation-UF membrane-absorption after enter back into spinning system or part is vented；CN200710132050.5 takes similar method with CN201310422368.2, and what CN201110279300.4 was announced is then solvent flash distillation recovery method.However, containing a large amount of dusts, oxygen in the waste gas containing decahydronaphthalene collected using air exhauster, adsorption system is not merely blocked by, and adsorption efficiency is reduced because oxygen is present, therefore new decahydronaphthalene waste gas treatment process technology need to be developed.
WATER-WASHING METHOD is widely used in the preprocessing process of various gases, can be not only gas humidification, cooling, dedusting, and can be in captured gas oxygen-bearing organic matter, hydro carbons etc., can most of organic matter in gas recovery, and technical maturity, treating capacity are big, simple to operate.CN200610166303.6 removes the heavy hydrocarbon of the oxygen-bearing organic matter and more than C6 in F- T synthesis circulating air using WATER-WASHING METHOD, and CN201310070751.6 proposes to carry out flue gas in power station boiler pretreatment using WATER-WASHING METHOD, carries out dedusting and cooling.Therefore, the present invention considers WATER-WASHING METHOD being introduced into decahydronaphthalene handling process, it is proposed that using the method for washing, absorption, reclaim the decahydronaphthalene in waste gas, while carrying out pretreatment dedusting, cooling, clean unstripped gas is provided for the deep purifying of next step gas.
During current high performance polyethylene fibre dry spinning, the source of the gas feature of the decahydronaphthalene waste gas of collection is necessary to develop a set of recovery process process simply, the decahydronaphthalene recovery process of efficiency high is pre-processed, to solve the deficiency of existing recovery technology.The invention reside in decahydronaphthalene washing recovery process in a kind of waste gas is provided, to solve the problems such as blocking of dust present in current decahydronaphthalene recovery technology, oxygen are disturbed.
The content of the invention
Recovery process is washed it is an object of the invention to provide a kind of decahydronaphthalene, the decahydronaphthalene in waste gas is reclaimed by the way of absorption is combined using washing, to solve the problems such as dust of prior art presence is blocked, oxygen is disturbed.
What the present invention was realized in：Using the decahydronaphthalene in the method removing waste gas of washing-absorption, waste gas containing decahydronaphthalene enters water scrubber from the gas distributor for washing tower bottom, the washings washed with oneself above tower top packing layer counter current contacting in the packing layer of water scrubber, decahydronaphthalene is become trapped in water in gas, purified gas discharges system after the mesh mist eliminator removing liquid at the top of water scrubber, decahydronaphthalene in washings squeezes into adsorption tower by water circulating pump, decahydronaphthalene in water is selectively adsorbed, the washings for being stripped of decahydronaphthalene are recycled, adsorbent after adsorption saturation takes steam blowing to regenerate or adsorbent extruding regeneration, it can be used after decahydronaphthalene removing micro-moisture after regeneration.
Specifically, the decahydronaphthalene waste gas collected from spinning workshop is directly entered the gas distributor of washing tower bottom, decahydronaphthalene waste gas and the circulation washings counter current contacting mass transfer in the packing layer in the middle part of water scrubber come from water scrubber top, dust in gas is removed, most of decahydronaphthalene is trapped by water smoke, gas temperature declines simultaneously, purified gas rises to the wire mesh demister set at the top of water scrubber, most of drop is removed herein, and purified gas draws out-of-bounds further processing by absorption tower top.Oil water mixture after washing, after the simply layering of washing tower bottom, the waste water intermittent discharge that bottom is drawn, oil-containing washings import adsorption tower by water circulating pump, decahydronaphthalene in adsorption tower in oil water mixture is selectively adsorbed, and the recirculated water after purification squeezes into water scrubber again by water circulating pump.According to sorbent used difference, the regeneration of adsorbent is also different, when using activated carbon or NACF for adsorbent, and renovation process is steam blowing-condensation-water-oil separating regeneration, when using oil absorbent material or expanded graphite for adsorbent, renovation process is intermittent extruding method of reproduction.
The present invention preferably, the decahydronaphthalene waste gas, in waste gas in addition to decahydronaphthalene, in addition to the one or more in nitrogen, oxygen, carbon dioxide, carbon monoxide, argon gas.
Contain dust and water smoke in the decahydronaphthalene waste gas, waste gas.
Decahydronaphthalene concentration is 100ppm ~ 4000ppm, preferably 1000ppm ~ 4000ppm, particularly preferred 2000ppm ~ 4000ppm in the decahydronaphthalene waste gas, waste gas.
The washing tower bottom is provided with gas distributor, and top is provided with wire mesh demister, and the wire feeding that middle part is provided with packing layer, water scrubber packing layer is random packing or structured packing.
The washing water layer of the washing tower bottom is provided with intermittent discharge mouthful, for discharging the waste water containing solid particle.
The adsorption tower is two groups, and one group is in absorption phase, and one group is in regeneration stage.
The adsorption tower is three groups, and one group is in absorption phase, and one group is in regeneration stage, and one group standby.
Adsorbent type in the adsorption tower is activated carbon or NACF, and adsorbent reactivation mode is low-pressure steam purging, condensation, water-oil separating, and the decahydronaphthalene after separation is sent to refining step and is further dehydrated, and waste water send sewage disposal or fills into water scrubber.
Adsorbent type in the adsorption tower is alternatively chosn to oil absorbent material or expanded graphite, and adsorbent reactivation mode regenerates for extruding, that is, squeezes out the liquid decahydronaphthalene adsorbed in adsorbent, adsorbent is to be regenerated.
Advantages of the present invention and the effect reached are：Decahydronaphthalene washes recovery process in waste gas, the decahydronaphthalene in waste gas is trapped using water scrubber, then again decahydronaphthalene is separated from the water out using the method choice adsorbed, dedusting, the effect of cooling are played to waste gas simultaneously, compared with the traditional treatment methods such as absorption method, membrane separation process, to source of the gas strong adaptability, it is to avoid the problems such as dust blocking, oxygen are disturbed, it is particularly suitable for the recovery of decahydronaphthalene in the air containing decahydronaphthalene that spinning workshop is collected using blower fan.
Brief description of the drawings
Fig. 1 is decahydronaphthalene washing recovery process general flow chart in embodiment waste gas.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiment
1
Certain spinning workshop is gone out using air exhauster from path extracts the air containing decahydronaphthalene out, and wherein decahydronaphthalene concentration is 3000ppm, in addition with a large amount of airborne dusts.Mixed gas is sent directly into water scrubber by axial flow blower, scrubbed water washing, wire mesh demister are removed after drop, it is sent directly into adsorption system, the concentration of decahydronaphthalene is down to 500ppm in the removal efficiency more than 99% of dust, gas in gaseous mixture after washing after testing, and adsorption tower uses expanded graphite for adsorbent, adsorbent after adsorption saturation takes out, oil therein is extruded using the method for extruding, then is reloaded adsorption tower recycling, the decahydronaphthalene purity of extrusion is up to more than 99%.
Embodiment
2
Certain spinning workshop is purged at preliminary draft hot tank and hot seven roller using nitrogen, is formed and is contained a certain amount of dust in the mixed gas for 900ppm, gas containing decahydronaphthalene concentration.Water scrubber is routed directly to by axial flow blower after the buffered pipe buffering of mixed gas, scrubbed water washing, wire mesh demister are removed after drop, it is sent directly into adsorption system, the removal efficiency more than 99.5% of dust in gaseous mixture after washing after testing, the near 300ppm of decahydronaphthalene concentration in gas, adsorption tower uses activated carbon for adsorbent, is purged and regenerated using 0.2MPa saturated vapor, purity is obtained up to more than 98% decahydronaphthalene liquid after condensed and water-oil separating.
Claims (10)
1. decahydronaphthalene washes recovery process in waste gas, it is characterized in that removing the decahydronaphthalene in waste gas using the method for washing-absorption, waste gas containing decahydronaphthalene enters water scrubber from the gas distributor for washing tower bottom, the washings washed with oneself above tower top packing layer counter current contacting in the packing layer of water scrubber, decahydronaphthalene is become trapped in water in gas, purified gas discharges system after the mesh mist eliminator removing liquid at the top of water scrubber, decahydronaphthalene in washings squeezes into adsorption tower by water circulating pump, decahydronaphthalene in water is selectively adsorbed, the washings for being stripped of decahydronaphthalene are recycled, adsorbent after adsorption saturation takes steam blowing to regenerate or adsorbent extruding regeneration, it can be used after decahydronaphthalene removing micro-moisture after regeneration.
2. decahydronaphthalene washes recovery process in waste gas according to claim 1, it is characterised in that the concentration of decahydronaphthalene is 100ppm ~ 4000ppm in the waste gas containing decahydronaphthalene.
3. decahydronaphthalene washes recovery process in waste gas according to claim 1 or claim 2, it is characterised in that the decahydronaphthalene waste gas also includes the one or more in nitrogen, oxygen, carbon dioxide, carbon monoxide, argon gas.
4. decahydronaphthalene washes recovery process in waste gas according to claim 1, it is characterised in that the washing tower bottom, which is provided with the middle part of gas distributor, water scrubber, is provided with packing layer, and wire feeding is random packing or structured packing.
5. decahydronaphthalene washes recovery process in waste gas according to claim 1, it is characterised in that the adsorbent in adsorption tower is activated carbon or NACF.
6. decahydronaphthalene washes recovery process in waste gas according to claim 5, it is characterised in that activated carbon or NACF in adsorption tower, its renovation process is that water-oil separating obtains liquid decahydronaphthalene after condensation using low-pressure steam purging after adsorption saturation.
7. decahydronaphthalene washes recovery process in waste gas according to claim 1, it is characterised in that the adsorbent in adsorption tower is the one or more in expanded graphite, oil absorbent material.
8. decahydronaphthalene washes recovery process in waste gas according to claim 7, it is characterised in that oil absorbent material or expanded graphite in adsorption tower, its renovation process is extruded the oil product wherein adsorbed using extrusion after adsorption saturation.
9. decahydronaphthalene washes recovery process in waste gas according to claim 1, it is characterised in that the adsorption tower is two groups, one group is in absorption phase, and one group is in regeneration stage.
10. decahydronaphthalene washes recovery process in waste gas according to claim 1, it is characterised in that the adsorption tower is three groups, one group is in absorption phase, and one group is in regeneration stage, and one group standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154940.5A CN107198913A (en) | 2016-03-18 | 2016-03-18 | Decahydronaphthalene washes recovery process in waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154940.5A CN107198913A (en) | 2016-03-18 | 2016-03-18 | Decahydronaphthalene washes recovery process in waste gas |
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| CN107198913A true CN107198913A (en) | 2017-09-26 |
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| CN201610154940.5A Pending CN107198913A (en) | 2016-03-18 | 2016-03-18 | Decahydronaphthalene washes recovery process in waste gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109289226A (en) * | 2018-09-29 | 2019-02-01 | 武汉旭日华环保科技股份有限公司 | The processing method and its device of high concentration decahydronaphthalene tail gas |
| CN110479050A (en) * | 2019-09-17 | 2019-11-22 | 中冶东方工程技术有限公司 | Zero gas consumption absorption drying equipment of steam regeneration and system |
| CN111246928A (en) * | 2017-11-16 | 2020-06-05 | 乔治洛德方法研究和开发液化空气有限公司 | Scrubber tower for cleaning a gas stream |
| CN117643775A (en) * | 2024-01-30 | 2024-03-05 | 国家能源集团煤焦化有限责任公司 | Countercurrent spraying type oil-water separator |
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| CN101391154A (en) * | 2007-09-20 | 2009-03-25 | 南化集团研究院 | Improved volatile organic compounds recovery method |
| CN202460412U (en) * | 2012-02-28 | 2012-10-03 | 郭灿明 | Organic waste gas treatment device |
| CN104609497A (en) * | 2015-02-11 | 2015-05-13 | 上海三夫工程技术有限公司 | Activated carbon treatment technology for organic wastewater |
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2016
- 2016-03-18 CN CN201610154940.5A patent/CN107198913A/en active Pending
Patent Citations (4)
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| CN202460412U (en) * | 2012-02-28 | 2012-10-03 | 郭灿明 | Organic waste gas treatment device |
| CN105327591A (en) * | 2014-08-15 | 2016-02-17 | 北京日新达能技术有限公司 | Organic exhaust-gas processing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111246928A (en) * | 2017-11-16 | 2020-06-05 | 乔治洛德方法研究和开发液化空气有限公司 | Scrubber tower for cleaning a gas stream |
| CN109289226A (en) * | 2018-09-29 | 2019-02-01 | 武汉旭日华环保科技股份有限公司 | The processing method and its device of high concentration decahydronaphthalene tail gas |
| CN109289226B (en) * | 2018-09-29 | 2024-04-05 | 武汉旭日华环保科技股份有限公司 | Method and device for treating high-concentration decalin tail gas |
| CN110479050A (en) * | 2019-09-17 | 2019-11-22 | 中冶东方工程技术有限公司 | Zero gas consumption absorption drying equipment of steam regeneration and system |
| CN117643775A (en) * | 2024-01-30 | 2024-03-05 | 国家能源集团煤焦化有限责任公司 | Countercurrent spraying type oil-water separator |
| CN117643775B (en) * | 2024-01-30 | 2024-04-02 | 国家能源集团煤焦化有限责任公司 | Countercurrent spraying type oil-water separator |
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Application publication date: 20170926 |