CN110252088B - Recovery system of aniline in tail gas - Google Patents
Recovery system of aniline in tail gas Download PDFInfo
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- CN110252088B CN110252088B CN201910553704.4A CN201910553704A CN110252088B CN 110252088 B CN110252088 B CN 110252088B CN 201910553704 A CN201910553704 A CN 201910553704A CN 110252088 B CN110252088 B CN 110252088B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/009—Collecting, removing and/or treatment of the condensate
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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
- B01D53/002—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 condensation
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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
- B01D53/1406—Multiple stage absorption
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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
- B01D53/1418—Recovery of products
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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
- B01D53/1431—Pretreatment by other processes
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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
- B01D53/1487—Removing organic compounds
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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
- B01D53/1493—Selection of liquid materials for use as absorbents
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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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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/82—Purification; Separation; Stabilisation; Use of additives
- C07C209/86—Separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
- B01D2252/2021—Methanol
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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
- B01D2257/40—Nitrogen compounds
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention relates to the technical field of tail gas absorption, in particular to a system for recovering aniline in tail gas, which comprises a condenser, a liquid collecting tank, a high-efficiency multistage spray absorption tower, an aniline water storage tank, an alcohol water storage tank, an aniline recovery storage tank, an aniline dehydration tower and a tail gas station incineration treatment. The aniline-containing waste gas enters a tail gas condenser through a pipeline, and the condensed liquid is collected into a liquid collection tank; then tail gas enters a high-efficiency multistage spray tower, low-concentration methanol water is used as an absorbent to enhance the absorption effect, absorption liquid at the bottom of the tower is led to an aniline dehydration tower for aniline recovery, and alcohol water at the top of the tower is led to the spray tower for recycling; the gas at the outlet of the spray tower is led to a tail gas station for incineration treatment; the invention has reasonable design, large gas treatment amount and stable operation. The method realizes the recycling of most aniline in the tail gas, reduces the consumption of raw materials, reduces the production cost and generates economic benefits; meanwhile, the tail gas treatment and operation cost is reduced.
Description
Technical Field
The invention relates to the technical field of tail gas absorption, in particular to a system for recovering aniline in tail gas.
Background
Aniline is one of the most important amines, the most important intermediate in the dye industry and an important raw material for producing pesticides. In related chemical production, the direct evacuation of tail gas containing aniline can cause environmental pollution, and is also a pollution source which is very difficult to treat thoroughly.
Disclosure of Invention
The invention aims to provide a system for recovering aniline in tail gas, which can effectively recover most of aniline in tail gas, reduce production cost and generate objective economic benefit; and simultaneously, the operation load for tail gas treatment is also reduced.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a system for recovering aniline in tail gas comprises a tail gas condenser, a liquid collecting tank, a multi-stage spray absorption tower, an aniline water storage tank, an alcohol water storage tank, an aniline recovery storage tank, an aniline dehydration tower and a tail gas outlet; the method comprises the following steps that (1) aniline-containing tail gas enters a tail gas condenser through a tail gas inlet, condensed liquid enters a liquid collecting tank after condensation, uncondensed gas enters a multistage spray absorption tower, methanol water is adopted as an absorbent in the multistage spray absorption tower, the methanol water is stored in an alcohol water storage tank, the alcohol water is lifted to an alcohol inlet at the top end of the multistage spray absorption tower through a lifting pump of the alcohol water storage tank, and the alcohol water enters the multistage spray absorption tower for recycling, so that the absorption degree is enhanced; and gas in the tail gas outlet of the multi-stage spraying absorption tower is led to a tail gas station for incineration treatment.
Furthermore, the tail gas condenser adopts a horizontal condenser, so that the construction difficulty is reduced, and on the premise of ensuring the condensation effect, the tail gas passes through a pipe, so that the gas resistance in a pipeline is reduced, and the treatment capacity is increased.
Further, the liquid in the liquid collecting tank is periodically conveyed to an aniline water storage tank by a pump.
Further, the methanol-water is a 10% methanol-water solution.
Furthermore, the multistage spray absorption tower comprises a first-stage spray tower and a second-stage spray tower, wherein the gas outlet of the first-stage spray tower is connected with the gas inlet of the second-stage spray tower, the gas outlet of the second-stage spray tower is communicated to the tail gas treatment station, the gas inlets of the first-stage spray tower and the second-stage spray tower are arranged at the lower part, and the gas outlet of the first-stage spray tower and the second-stage spray tower is arranged at the upper part.
Furthermore, stainless steel perforated plate corrugated packing is arranged in the first-stage spray tower and the second-stage spray tower to enhance the absorption effect of the spray tower, alcohol inlets at the top ends of the first-stage spray tower and the second-stage spray tower adopt spiral nozzles to atomize and enhance the spray effect of methanol water, a foam remover at the top of the spray tower is arranged at the upper part in the tower, and a spray tower water tank is arranged at the bottom.
Furthermore, a water tank of the spray tower is provided with a condensing coil pipe for cooling water absorbing aniline; the condensate in the spray tower water tank is output by a delivery pump, wherein the delivery pipeline is divided into two paths, the flow of the pipeline is controlled by a valve, one path of the pipeline is controlled to be 40% and delivered to an aniline water storage tank, and the other path of the pipeline is controlled to be 60% and delivered to the top of the multistage spray absorption tower for the internal circulation of the tower, so that the saturation degree of the absorption liquid is ensured.
Further, liquid used for circulation in the spray tower water tank is sprayed into the multistage spray absorption tower through high and low stages, the spraying amount is controlled by a valve, the high-position water spraying amount is 1/3, and the low-position water spraying amount is 2/3.
Further, conveying the crude aniline settled at the bottom of the aniline in the aniline water storage tank to an aniline dehydration tower for aniline recovery; crude aniline settled at the bottom of aniline in an aniline water storage tank is preheated by an aniline water preheater before being conveyed to an aniline dehydration tower; aniline at the bottom of the aniline dehydration tower is condensed by an aniline condenser and then is conveyed to a recovered aniline storage tank; aniline water distilled from the top of the aniline dehydrating tower is conveyed into an aniline water tank through an aniline water condenser and a gas-liquid separator for settlement, and gas of the gas-liquid separator enters a vacuum unit after passing through a vacuum buffer tank; the upper part of the amine water storage tank is provided with an overflow port, supernatant liquid after sedimentation is methanol mixed with water, and the methanol water overflows into the alcohol water tank for spraying again for reuse.
Further, the temperature at the top of the aniline dehydrating tower is 70-100 ℃, the temperature at the bottom of the aniline dehydrating tower is 100-.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a system for recovering aniline in tail gas, which adopts a methanol aqueous solution with lower concentration as an absorption liquid, greatly enhances the aniline absorption capacity of the methanol aqueous solution, and can efficiently absorb aniline in tail gas; the aniline dehydration tower realizes the recovery of aniline, reduces the production cost and generates economic benefits; meanwhile, the clean emission of tail gas is realized after the residual gas is incinerated.
Drawings
FIG. 1 is a schematic view of a system for recovering aniline from tail gas according to the present invention.
In the figure: 1 is a tail gas inlet, 2 is a tail gas condenser, 3 is a liquid collecting tank, 4 is a primary spray tower, 5 is a secondary spray tower, 6 is a spray tower top demister, 7 is a spray tower water tank, 8 is an aniline water storage tank, 9 is an alcohol water storage tank, 10 is a recycled aniline storage tank, 11 is a spray tower gas outlet buffer tank, 12 is an incineration treatment leading to a tail gas treatment station, 13 is an aniline dehydration tower, 14 is an aniline water preheater, 15 is a reboiler, 16 is an aniline condenser, 17 is an aniline water condenser, 18 is a vacuum buffer tank, 19 is a gas-liquid separator, 20 is a tail gas condenser cooling circulating water inlet, 21 is a tail gas condenser cooling circulating water outlet, 22 is a vacuum unit, 23 is an aniline condenser circulating cooling water inlet, 24 is an aniline condenser circulating cooling water outlet, 25 is a reboiler steam inlet, 26 is a steam outlet, 27 is an aniline water steam inlet, 28 is the steam outlet of the aniline water preheater.
Detailed Description
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. 1, a system for recovering aniline from tail gas comprises a tail gas condenser 2, a liquid collecting tank 3, a multi-stage spray absorption tower, an aniline water storage tank 8, an alcohol water storage tank 9, an aniline recovery storage tank 10, an aniline dehydration tower 13 and a tail gas outlet 12; tail gas containing aniline enters a tail gas condenser 2 through a tail gas inlet 1, condensed liquid enters a liquid collecting tank 3 after condensation, uncondensed gas enters a multistage spray absorption tower, methanol water is adopted as an absorbent in the multistage spray absorption tower, the methanol water is stored in an alcohol water storage tank 9, and the methanol water is lifted to an alcohol inlet at the top end of the multistage spray absorption tower by a lift pump of the alcohol water storage tank 9 and enters the multistage spray absorption tower for recycling; and gas in the tail gas outlet 12 of the multi-stage spray absorption tower is led to a tail gas station for incineration treatment.
Furthermore, the tail gas condenser 2 adopts a horizontal condenser, tail gas enters the tail gas condenser 2 through a tail gas inlet 1, the tail gas passes through a pipe pass, condensed water is condensed on the tail gas through a shell pass through a tail gas condenser cooling circulating water inlet 20, and the condensed water is discharged through a tail gas condenser cooling circulating water outlet 21.
Further, the liquid in the liquid collecting tank 3 is periodically pumped to convey the materials in the tank to the aniline water storage tank 8.
Further, the multistage spray absorption tower comprises a first-stage spray tower 4 and a second-stage spray tower 5, an air outlet of the first-stage spray tower 4 is connected with an air inlet of the second-stage spray tower 5, and an air outlet of the upper part of the first-stage spray tower 4 is provided with a spray tower air outlet buffer tank 11; and a gas outlet of the secondary spray tower 5 is communicated with a tail gas treatment station.
Furthermore, stainless steel pore plate corrugated packing is arranged in the first-stage spray tower 4 and the second-stage spray tower 5, alcohol inlets at the top ends of the first-stage spray tower 4 and the second-stage spray tower 5 adopt spiral nozzles, a spray tower top demister 6 is arranged at the upper part in the tower, the top demister 6 is positioned at the lower side of the air outlet, and a spray tower water tank 7 is arranged at the bottom.
Further, the methanol-water is a 10% methanol-water solution.
Furthermore, a condensing coil is arranged in the spray tower water tank 7, a conveying pump is adopted for outputting condensate in the spray tower water tank 7, wherein the conveying pipeline is divided into two paths, the flow of the pipeline is controlled by a valve, 40% of the flow of the pipeline is controlled by one path of the pipeline and conveyed to the aniline water storage tank 8, and 60% of the flow of the pipeline is controlled by the other path of the pipeline and conveyed to the top of the multistage spray absorption tower for tower internal circulation.
Liquid used for circulation in the spray tower water tank 7 is sprayed into the multistage spray absorption tower through high and low stages, and the spraying amount is controlled by a valve, wherein the high-position water spraying amount is 1/3, and the low-position water spraying amount is 2/3.
Further, crude aniline settled at the bottom of the aniline in the aniline water storage tank 8 is conveyed to an aniline dehydration tower 13 for aniline recovery.
Further, crude aniline settled at the bottom of the aniline in the aniline water storage tank 8 is conveyed to an aniline dehydration tower 13 for aniline recovery; crude aniline settled at the bottom of aniline in the aniline water storage tank 8 is conveyed to the aniline dehydration tower 13 and preheated by an aniline water preheater 14, wherein the aniline water preheater 14 is provided with an aniline water preheater steam inlet 27 for steam input and an aniline water preheater steam outlet 28 for steam output; aniline at the bottom of the aniline dehydration tower is condensed by an aniline condenser 16 and then is conveyed to a recovered aniline storage tank 10, the aniline condenser 16 is provided with an aniline condenser circulating cooling water inlet 23 for inputting cooling water, and an aniline condenser circulating cooling water outlet 24 for outputting cooling water; aniline water distilled from the top of the aniline dehydrating tower 13 is conveyed into an aniline water tank through an aniline water condenser 17 and a gas-liquid separator 19 for sedimentation, and gas in the gas-liquid separator 19 enters a vacuum unit 22 after passing through a vacuum buffer tank 18; the upper part of the aniline water storage tank 8 is provided with an overflow port, supernatant liquid after sedimentation is methanol and water, and the methanol water overflows into the alcohol water tank 9 for spraying and applying mechanically again.
Further, the temperature at the top of the aniline dehydrating tower 13 is 70-100 ℃, the temperature at the bottom of the aniline dehydrating tower is 100-.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (4)
1. A recovery system of aniline in tail gas which characterized in that: the system comprises a tail gas condenser (2), a liquid collecting tank (3), a multi-stage spray absorption tower, an aniline water storage tank (8), an alcohol water storage tank (9), an aniline recovery storage tank (10), an aniline dehydration tower (13) and a tail gas outlet (12); tail gas containing aniline enters a tail gas condenser (2) through a tail gas inlet (1), condensed liquid enters a liquid collecting tank (3) after condensation, uncondensed gas enters a multistage spraying absorption tower, methanol water is adopted as an absorbent in the multistage spraying absorption tower and stored in an alcohol water storage tank (9), and the methanol water is lifted to an alcohol inlet at the top end of the multistage spraying absorption tower by a lift pump of the alcohol water storage tank (9) and enters the multistage spraying absorption tower for recycling; gas in a tail gas outlet (12) of the multi-stage spray absorption tower is led to a tail gas station for incineration treatment; the tail gas condenser (2) adopts a horizontal condenser, and tail gas passes through a tube pass; the liquid in the liquid collecting tank (3) is periodically conveyed to an aniline water storage tank (8) by a pump; the methanol water is 10% methanol water solution; conveying the crude aniline settled at the bottom of the aniline in the aniline water storage tank (8) to an aniline dehydration tower (13) for aniline recovery; crude aniline settled at the bottom of aniline in an aniline water storage tank (8) is preheated by an aniline water preheater (14) before being conveyed to an aniline dehydration tower (13); aniline at the bottom of the aniline dehydration tower is condensed by an aniline condenser (16) and then is conveyed to a recovered aniline storage tank (10); aniline water distilled from the top of the aniline dehydrating tower (13) is conveyed into an aniline water tank through an aniline water condenser (17) and a gas-liquid separator (19) for sedimentation, and gas of the gas-liquid separator (19) enters a vacuum unit (22) after passing through a vacuum buffer tank (18); an overflow port is arranged at the upper part of the amine water storage tank (8), supernatant after sedimentation is methanol and water, and the methanol water overflows into the alcohol water storage tank (9) for spraying again and applying mechanically.
2. The system for recovering aniline from tail gas according to claim 1, wherein: the multistage spray absorption tower comprises a first-stage spray tower (4) and a second-stage spray tower (5), wherein the gas outlet of the first-stage spray tower (4) is connected with the gas inlet of the second-stage spray tower (5), and the gas outlet of the second-stage spray tower (5) is communicated to a tail gas treatment station; the air inlets of the first-stage spray tower (4) and the second-stage spray tower (5) are arranged at the lower part, and the air outlets are arranged at the upper part.
3. The system for recovering aniline from tail gas according to claim 2, wherein: stainless steel pore plate corrugated packing is arranged in the first-stage spray tower (4) and the second-stage spray tower (5), alcohol inlets at the top ends of the first-stage spray tower (4) and the second-stage spray tower (5) adopt spiral nozzles, a spray tower top demister (6) is arranged at the upper part in the tower, and a spray tower water tank (7) is arranged at the bottom.
4. The system for recovering aniline from tail gas according to claim 3, wherein: the spray tower water tank (7) is provided with a condensing coil, liquid in the spray tower water tank (7) is output by adopting a delivery pump, wherein the delivery pipeline is divided into two paths, the flow of the pipeline is controlled by adopting a valve, 40% of the flow of the pipeline is controlled by one path and delivered to the aniline water storage tank (8), and 60% of the flow of the pipeline is controlled by the other path and delivered to the top of the multistage spray absorption tower for tower internal circulation.
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| CN201910553704.4A CN110252088B (en) | 2019-06-25 | 2019-06-25 | Recovery system of aniline in tail gas |
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| CN201910553704.4A CN110252088B (en) | 2019-06-25 | 2019-06-25 | Recovery system of aniline in tail gas |
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| CN113877232B (en) * | 2020-07-02 | 2024-01-26 | 中国石油化工股份有限公司 | Treatment method and system for aniline-containing gas |
| CN112265972A (en) * | 2020-11-13 | 2021-01-26 | 西安近代化学研究所 | Method for recycling inert carrier gas in ethylene imine production |
| CN112870922A (en) * | 2021-01-21 | 2021-06-01 | 山东宏原环保科技有限公司 | Method for purifying low-concentration formaldehyde waste gas |
| CN116059792A (en) * | 2021-10-29 | 2023-05-05 | 中石化南京化工研究院有限公司 | Device and method for treating tail gas produced in the production process of antioxidant TMQ |
| CN117258483A (en) * | 2023-11-09 | 2023-12-22 | 浙江德力装备有限公司 | Treatment method of nitrogen-containing organic waste gas |
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| CN107511023A (en) * | 2017-09-12 | 2017-12-26 | 南通意特化工有限公司 | A kind of retracting device and method of new dimethylaniline and acetic acid waste gas |
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| CN1122335A (en) * | 1994-10-29 | 1996-05-15 | 张全景 | Method for treating waste gas from producing process of benzothiazole |
| US7049471B2 (en) * | 2003-10-10 | 2006-05-23 | E. I. Du Pont De Nemours And Company | Separation of amine from a phenolic compound |
| CN101920159A (en) * | 2010-09-10 | 2010-12-22 | 北京金源化学集团有限公司 | Method for removing and reclaiming sulfur dioxide from gas by low power consumption renewable absorbent |
| CN203043796U (en) * | 2013-02-06 | 2013-07-10 | 常州市宝隆化工有限公司 | Hydrogen-rich waste gas recycling device of N-methylaniline |
| CN207493436U (en) * | 2017-11-21 | 2018-06-15 | 山东金岭新材料有限公司 | A kind of aniline post processing aniline condensing unit |
| CN109304079B (en) * | 2018-10-07 | 2024-05-28 | 泰安瑞赛昊环保科技有限公司 | Recovery device and method for tail gas of rubber accelerator M |
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| CN107511023A (en) * | 2017-09-12 | 2017-12-26 | 南通意特化工有限公司 | A kind of retracting device and method of new dimethylaniline and acetic acid waste gas |
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| Title |
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| 苯胺废水回收精馏装置控制设计优化;技术与创新;《技术与创新》;20101231;第37卷(第4期);第100-102页 * |
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