CN106178846B - The exhaust system of ECH organic tail gas is reduced in epoxy resin production - Google Patents
The exhaust system of ECH organic tail gas is reduced in epoxy resin production Download PDFInfo
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- CN106178846B CN106178846B CN201610750552.3A CN201610750552A CN106178846B CN 106178846 B CN106178846 B CN 106178846B CN 201610750552 A CN201610750552 A CN 201610750552A CN 106178846 B CN106178846 B CN 106178846B
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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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
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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
- B01D53/26—Drying gases or vapours
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The invention discloses the exhaust system for reducing ECH organic tail gas in a kind of production of epoxy resin, including ECH tail gas pretreatment system, Carbon fibe, active carbon adsorption desorption system are set after ECH tail gas pretreatment system；The ECH tail gas pretreatment system includes level-one water spray absorption plant, condensing unit is set after level-one water spray absorption plant, second level water spray system is set after condensing unit, tail gas foam removal, drying device are set after second level water spray system, the condenser of -15 DEG C of freezing liquids is set after tail gas foam removal, drying device, alkali spray equipment is set after the condenser of -15 DEG C of freezing liquids, split-phase Despumation device is set after alkali spray equipment；The Carbon fibe and/or active carbon adsorption desorption system include I and II Carbon fibe and/or active carbon transformation adsorption desorption device.Easy, the environmentally friendly energy conservation of the present invention, safety.
Description
Technical field
The present invention relates to the exhaust systems that ECH organic tail gas is reduced in a kind of production of epoxy resin.
Background technique
The process route of traditional ECH exhaust gas processing device mainly has following two kinds of routes：
Process route one：ECH tail gas uses TQR tower burning disposal, due to containing C-Cl key in ECH molecule, burns in tail gas
When burning such as temperature control improper can generate phosgene；ECH is burned can waste of resource and the energy；It is at high cost using TQR tower burning disposal,
Tail gas after burning also needs to be further processed, and in first class explosion-protection equipment setting incinerator, to safety in production, there is also certain to choose
War, so epoxy industry uses the technique seldom to handle the ECH vent gas treatment in epoxy resin production.
Process route two：With second level carbon fiber adsorption desorption plus second order activity after ECH tail gas is condensed using two to three-level
Charcoal adsorption desorption technique, since ECH causes the hydrolysis of ECH in adsorption desorption containing moisture in carbon fiber：
Since the hydrochloric acid that ECH hydrolytic process generates can promote the ECH of high concentration to generate autohemagglutination again, due to shadow after ECH autohemagglutination
Such as there is emergency case and is possible to safety accident occur to the adsorption effect of ECH in rattle gas；In addition the glycerol that ECH hydrolysis generates
It is difficult to discharge the useful space again after 296 DEG C of the boiling point useful spaces for occupying carbon fiber, influences the adsorption/desorption effect of carbon fiber, contracts
The desorption cycles that jacket and shorts are set consume mass energy, and the service life of Carbon fibe shortens dramatically, while being also unable to reach national new
(former industry exhaust emission standard is that ECH content is≤40mg/ cubic metres in tail gas to the requirement of ECH exhaust emission standard；2017 7
Country ECH exhaust emission standard requires to improve after month 1 day, it is desirable that in the tail gas after raising ECH content should control≤8mg/ stands
Square rice)；Reach new standard to require that technological innovation need to be carried out to traditional exhaust gas treating method, reaches ECH tail gas country
Discharge standard requirement；Or processing tail gas is returned into epoxy purification, filters pressing, raw material and finished product storage process after compressor compresses
Nitrogen protecting system reuse.
Summary of the invention
The purpose of the present invention is to provide reduce ECH in a kind of easy, environmental protection energy conservation, the epoxy resin production of safety to have
The exhaust system of tail gas.
The technical solution of the invention is as follows：
The exhaust system of ECH organic tail gas is reduced in a kind of production of epoxy resin, it is characterized in that：Locate in advance including ECH tail gas
Carbon fibe, active carbon adsorption desorption system are arranged after ECH tail gas pretreatment system for reason system；The ECH tail gas pretreatment system packet
Level-one water spray absorption plant is included, condensing unit is set after level-one water spray absorption plant, and setting second level water sprays after condensing unit
Tail gas foam removal, drying device are arranged after second level water spray system for shower device, -15 DEG C of freezings of setting after tail gas foam removal, drying device
Alkali spray equipment is arranged after the condenser of -15 DEG C of freezing liquids, split-phase Despumation device is arranged after alkali spray equipment for the condenser of liquid；
The Carbon fibe and/or active carbon adsorption desorption system include I and II Carbon fibe and/or active carbon transformation adsorption desorption device；
ECH tail gas is successively through level-one water spray absorption plant, condensing unit, second level water spray system, tail gas foam removal, drying
Condenser, the split-phase Despumation device of device, -15 DEG C of freezing liquids；In I and II water spray absorption plant, ECH tail gas and spray
Washing absorption water reverse flow, the time of contact of tail gas and shower water is greater than 12 seconds in water spray absorption plants at different levels, water spray
Absorption plant tower bottom satiety ECH waste water quantitatively detaches system；The tail gas foam removal, drying device include being arranged in second level water spray
The defoamed separation device of device tower top and the dehumidification device being arranged in front of -15 DEG C of freezing liquid condenser guarantee tail gas fixed gas
In the condensing unit safety for the freezing liquid that medium is -15 DEG C；The split-phase Despumation device includes silk screen Despumation device and water
Envelope removes the device of alkali and foam；
Carbon fibe and/or activated carbon adsorption are adsorbed using micro-positive pressure, and aerodynamic force builds the pressure by engine manifold, work as fixed gas
ECH, Carbon fibe and/or activated carbon adsorption ECH value are recycled through Carbon fibe and/or Accumulation with Activated Carbon after Despumation device foam removal
When reaching the 10%-15% of Carbon fibe and/or active carbon own wt, by tail gas intake valve switch to another Carbon fibe and/
Or charcoal canister carries out ECH absorption；In addition the Carbon fibe and/or charcoal canister that adsorb ECH close to saturation are subjected to desorption recycling
ECH；Desorption adds indirect steam heating desorption recycling ECH using vacuum, and desorption initial stage is only with vacuum desorption into adsorbent material
ECH content be lower than 1% when, open indirect steam heating and take off remaining ECH；Desorption generates after the chilled water condensation of tail gas is handled not
Solidifying tail gas is transported to another Carbon fibe and/or charcoal canister with blower and adsorbs again.
The level-one water spray absorption plant is that chilled water temperature is 6 DEG C；It is arranged after level-one water spray absorption plant cold
Solidifying device, chilled water temperature are 6 DEG C, and including I and II condensing unit.
In the condensing unit of -15 DEG C of freezing liquids, outlet temperature and the freezing liquid of condenser enter condenser flow and are joined
Lock control, system ensure that condensator outlet gaseous state is stablized.
EC H content of the ECH tail gas again after the processing of alkali spray equipment in tail gas drops to≤800mg/ cubic metres, works as alkali
When concentration of lye in spray equipment is dropped within 2%, this part lye is applied to epoxy resin purification and washing unit.
ECH engine manifold ECH content of the present invention >=12000mg/ cubic metres sprays absorption and 6 DEG C of freezing water coolings through level-one
After solidifying, engine manifold ECH content is down to 8000-10000mg/ cubic metres；Tail gas passes through -15 DEG C of freezing liquid through spraying again with washing
After condensation, the ECH concentration in tail gas drops to≤1200mg/ cubic metres；The present invention is handled containing ECH vent gas treatment, tail gas
It can reach national ECH exhaust emission standard requirement of in the July, 2017 by promulgation, ECH content in tail gas after processing≤8mg/ cubes
Rice.
In addition original process are desorbed using direct steam when ECH is desorbed, since ECH exists in water and in the hot environment Yishui River
Solution, hydrolysate is glycerol and hydrochloric acid, due to 296 degree of boiling point of glycerol, since glycerol has been occupied behind the gap of Carbon fibe with one
As processing method be difficult again to cement out glycerol from the gap occupied, from face ring Carbon fibe using effect, in addition
The hydrochloric acid corrosive equipment of generation will appear ECH polymerization reaction in the high ECH concentration medium existing for hydrochloric acid, influence at tail gas
The realization of science and engineering skill such as controls and improper easily process safety accident occurs.New process is desorbed using negative pressure low temperature, avoids ECH de-
The hydrolysis of attached process is avoided the generation of glycerol and hydrochloric acid, is desorbed using negative-pressure vacuum, and indirect heating technique keeps Carbon fibe and work
Property charcoal the dry life cycle for guaranteeing Carbon fibe and particle charcoal.It ensure that the treatment effect of tail gas.
To save the energy, the tail gas after activated carbon adsorption can reach epoxy purification, filters pressing, raw material and production through compression processing
Treated tail gas can be carried out after compression processing that application and epoxy resin are raw again by the nitrogen protection requirement of storage of finished products process
Production system can greatly save the energy while accomplish energy-saving and emission-reduction.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the process flow diagram of one embodiment of the invention.
Specific embodiment
The exhaust system of ECH organic tail gas, including ECH tail gas pretreatment system, ECH are reduced in a kind of production of epoxy resin
Carbon fibe, active carbon adsorption desorption system are set after tail gas pretreatment system；The ECH tail gas pretreatment system includes the spray of level-one water
Absorption plant is drenched, condensing unit is set after level-one water spray absorption plant, second level water spray system, second level are set after condensing unit
Tail gas foam removal, drying device are set after water spray system, the condensation of -15 DEG C of freezing liquids is set after tail gas foam removal, drying device
Alkali spray equipment is arranged after the condenser of -15 DEG C of freezing liquids, split-phase Despumation device is arranged after alkali spray equipment for device；The Carbon fiber
Dimension and/or active carbon adsorption desorption system include I and II Carbon fibe and/or active carbon transformation adsorption desorption device；
ECH tail gas is successively through level-one water spray absorption plant, condensing unit, second level water spray system, tail gas foam removal, drying
Condenser, the split-phase Despumation device of device, -15 DEG C of freezing liquids；In I and II water spray absorption plant, ECH tail gas and spray
Washing absorption water reverse flow, the time of contact of tail gas and shower water is greater than 12 seconds in water spray absorption plants at different levels, water spray
Absorption plant tower bottom satiety ECH waste water quantitatively detaches system；The tail gas foam removal, drying device include being arranged in second level water spray
The defoamed separation device of device tower top and the dehumidification device being arranged in front of -15 DEG C of freezing liquid condenser guarantee tail gas fixed gas
In the condensing unit safety for the freezing liquid that medium is -15 DEG C；The split-phase Despumation device includes silk screen Despumation device and water
Envelope removes the device of alkali and foam；The Liquid level and inflow of water spray absorption plant control, after ECH reaches saturation in sprayed tank
It needs that ECH saturated water is transferred to the rectifying of ECH waste water (inflow and liquid level carry out interlocked control) in time, is reduced by spray washing
ECH content in tail gas, while the tangential velocity of tail gas is reduced, it is controlled by tail gas air inflow and 6 DEG C of chilled water inflow interlockings
System maximizes the efficiency of spray.
Carbon fibe and/or activated carbon adsorption are adsorbed using micro-positive pressure, and aerodynamic force builds the pressure by engine manifold, work as fixed gas
ECH, Carbon fibe and/or activated carbon adsorption ECH value are recycled through Carbon fibe and/or Accumulation with Activated Carbon after Despumation device foam removal
When reaching the 10%-15% of Carbon fibe and/or active carbon own wt, by tail gas intake valve switch to another Carbon fibe and/
Or charcoal canister carries out ECH absorption；In addition the Carbon fibe and/or charcoal canister that adsorb ECH close to saturation are subjected to desorption recycling
ECH；Desorption adds indirect steam heating desorption recycling ECH using vacuum, and desorption initial stage is only with vacuum desorption into adsorbent material
ECH content be lower than 1% when, open indirect steam heating and take off remaining ECH；Desorption generates after the chilled water condensation of tail gas is handled not
Solidifying tail gas is transported to another Carbon fibe and/or charcoal canister with blower and adsorbs again.
The I and II water spray absorption plant is that chilled water temperature is 6 DEG C；It is arranged after level-one water spray absorption plant
Condensing unit, chilled water temperature are 6 DEG C, and including I and II condensing unit.
In the condensing unit of -15 DEG C of freezing liquids, outlet temperature and the freezing liquid of condenser enter condenser flow and are joined
Lock control, system ensure that condensator outlet gaseous state is stablized.
Claims (4)
1. the exhaust system of ECH organic tail gas is reduced in a kind of epoxy resin production, it is characterized in that：It is pre-processed including ECH tail gas
Carbon fibe, active carbon adsorption desorption system are arranged after ECH tail gas pretreatment system for system；The ECH tail gas pretreatment system includes
Condensing unit is arranged after level-one water spray absorption plant, second level water spray is arranged after condensing unit for level-one water spray absorption plant
Tail gas foam removal, drying device are arranged after second level water spray system, -15 DEG C of freezing liquids are arranged after tail gas foam removal, drying device for device
Condenser, alkali spray equipment is set after the condenser of -15 DEG C of freezing liquids, split-phase Despumation device is set after alkali spray equipment；Institute
It states Carbon fibe and/or active carbon adsorption desorption system includes I and II Carbon fibe and/or active carbon transformation adsorption desorption device；
ECH tail gas is successively through level-one water spray absorption plant, condensing unit, second level water spray system, tail gas foam removal, dry dress
It sets, condenser, the split-phase Despumation device of -15 DEG C of freezing liquids；In I and II water spray absorption plant, ECH tail gas is washed with spray
It washs and absorbs water reverse flow, the time of contact of tail gas and shower water is greater than 12 seconds in water spray absorption plants at different levels, and water spray is inhaled
Receiving apparatus tower bottom satiety ECH waste water quantitatively detaches system；The tail gas foam removal, drying device include that setting is filled in second level water spray
The defoamed separation device of tower top and the dehumidification device being arranged in front of the condenser of -15 DEG C of freezing liquids are set, guarantees that tail gas fixed gas exists
Medium is the condenser safety of -15 DEG C of freezing liquids；The split-phase Despumation device includes silk screen Despumation device and water seal except alkali
With the device of foam；
Carbon fibe and/or activated carbon adsorption are adsorbed using micro-positive pressure, and aerodynamic force builds the pressure by engine manifold, when fixed gas is through removing
ECH is recycled through Carbon fibe and/or Accumulation with Activated Carbon after foam device foam removal, Carbon fibe and/or activated carbon adsorption ECH value reach
When the 10%-15% of Carbon fibe and/or active carbon own wt, tail gas intake valve is switched into another Carbon fibe and/or work
Property canister carry out ECH absorption；In addition the Carbon fibe and/or charcoal canister that adsorb ECH close to saturation are subjected to desorption recycling ECH；
Desorption adds indirect steam heating desorption recycling ECH using vacuum, and ECH of the initial stage only with vacuum desorption into adsorbent material is desorbed
When content is lower than 1%, opens indirect steam heating and take off remaining ECH；Desorption does not coagulate tail after generating the chilled water condensation processing of tail gas
Gas is transported to another Carbon fibe and/or charcoal canister with blower and adsorbs again.
2. the exhaust system of ECH organic tail gas is reduced in epoxy resin production according to claim 1, it is characterized in that：Institute
State level-one water spray absorption plant be chilled water temperature be 6 DEG C；The condensing unit being arranged after level-one water spray absorption plant, it is cold
Freezing coolant-temperature gage is 6 DEG C, and including I and II condensing unit.
3. reducing the exhaust system of ECH organic tail gas, feature in epoxy resin production according to claim 1 or 2
It is：In the condenser of -15 DEG C of freezing liquids, the outlet temperature and freezing liquid of condenser enter condenser flow and carry out interlocked control,
Ensure that condensator outlet gaseous state is stablized.
4. the exhaust system of ECH organic tail gas is reduced in epoxy resin production according to claim 1 or 2, it is characterized in that：
EC H content of the ECH tail gas again after the processing of alkali spray equipment in tail gas drops to≤800mg/ cubic metres, when alkali spray equipment
In concentration of lye when dropping within 2%, by this part, lye is applied to epoxy resin purification and washing unit.
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| CN201610750552.3A CN106178846B (en) | 2016-08-29 | 2016-08-29 | The exhaust system of ECH organic tail gas is reduced in epoxy resin production |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351127A (en) * | 2016-12-13 | 2019-02-19 | 南通星辰合成材料有限公司 | The exhaust gas treating method of ECH, nitrogen reuse are removed in epoxy resin production |
| CN107008107B (en) * | 2017-04-11 | 2021-04-30 | 湖北绿色家园材料技术股份有限公司 | Comprehensive treatment method and treatment device for waste gas in benzyl alcohol production |
| CN111389194B (en) * | 2020-04-15 | 2022-08-16 | 无锡厚德石化工程设计有限公司 | Improve alkali lye spray column of epichlorohydrin tail gas absorption rate |
| CN111961189B (en) * | 2020-07-24 | 2023-01-06 | 合肥工业大学 | Refining method of bisphenol A type epoxy resin |
| CN115501722A (en) * | 2021-06-23 | 2022-12-23 | 南通星辰合成材料有限公司 | Method for treating epichlorohydrin tail gas |
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| TW201444608A (en) * | 2013-05-28 | 2014-12-01 | Cheng Yuan Environment Technology Co Ltd | Adsorption/desorption purification system capable of increasing condensation recycling efficiency |
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| GB398010A (en) * | 1931-08-01 | 1933-09-07 | Rech S Et D Expl S Petrolifere | Process and arrangement for the recovery of gases or vapours by means of solid adsorbent substances with recovery of heat units |
| CN202173804U (en) * | 2011-08-05 | 2012-03-28 | 天津晶东化学复合材料有限公司 | Tail gas treating device used in epoxy resin production line |
| CN203123770U (en) * | 2013-03-19 | 2013-08-14 | 无锡蓝海工程设计有限公司 | Discharge system capable of reducing organic tail gas during production of basic epoxy resin |
| TW201444608A (en) * | 2013-05-28 | 2014-12-01 | Cheng Yuan Environment Technology Co Ltd | Adsorption/desorption purification system capable of increasing condensation recycling efficiency |
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