CN109529611B - Tail gas treatment device and method in styrene-butadiene latex production - Google Patents
Tail gas treatment device and method in styrene-butadiene latex production Download PDFInfo
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- CN109529611B CN109529611B CN201811580990.5A CN201811580990A CN109529611B CN 109529611 B CN109529611 B CN 109529611B CN 201811580990 A CN201811580990 A CN 201811580990A CN 109529611 B CN109529611 B CN 109529611B
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- Prior art keywords
- tail gas
- gas
- absorption liquid
- cooler
- styrene
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- 239000002174 Styrene-butadiene Substances 0.000 title claims abstract description 29
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000004816 latex Substances 0.000 title claims abstract description 29
- 229920000126 latex Polymers 0.000 title claims abstract description 29
- 239000011115 styrene butadiene Substances 0.000 title claims abstract description 29
- 229920003048 styrene butadiene rubber Polymers 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000010521 absorption reaction Methods 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 230000003197 catalytic effect Effects 0.000 claims abstract description 31
- 238000003795 desorption Methods 0.000 claims abstract description 11
- 230000001174 ascending effect Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 93
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 239000012855 volatile organic compound Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a device and a method for treating tail gas in the production of styrene-butadiene latex, wherein the device comprises a heater and a catalytic reactor; the tail gas cooled by the first cooler is sent to an absorption tower and a desorption tower; the tail gas after the temperature reduction is absorbed or desorbed in the absorption and desorption tower, and the tail gas carrying the absorption liquid is sent to a separator; and the separator is used for conveying the tail gas of the separated absorption liquid to the heater and the catalytic reactor. The invention has the advantages of good treatment effect, standard emission and the like.
Description
Technical Field
The invention relates to tail gas treatment, in particular to a device and a method for treating tail gas in the production of styrene-butadiene latex.
Background
In the production process of styrene-butadiene latex, the tail gas discharged from a vacuum pump outlet in the material transferring and stripping process contains Volatile Organic Compounds (VOCs) such as butadiene and styrene, and the tail gas mainly has the characteristics of high instantaneous emission concentration (up to hundreds of thousands of milligrams per cubic meter), large concentration fluctuation, large flow fluctuation, no oxygen in the tail gas and irregular emission, and the current main treatment mode is as follows:
1. the direct combustion method (TO) is adopted for treatment, so that the problems of high investment cost and high operation cost exist.
2. Some enterprises try to treat the waste gas by adopting a thermal storage oxidation method (RTO), explosion accidents occur, and the safety production of the enterprises is seriously affected. The thermal storage oxidation method needs to dilute the tail gas in a large proportion, so that the investment and the operation cost of the tail gas treatment facility are high.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the tail gas treatment device for the styrene-butadiene latex production, which has the advantages of good treatment effect, standard emission, low cost and safety.
The invention aims at realizing the following technical scheme:
the device for treating the tail gas in the production of the styrene-butadiene latex comprises a heater and a catalytic reactor; the tail gas treatment device in the styrene-butadiene latex production further comprises:
the tail gas cooled by the first cooler is sent to an absorption tower and a desorption tower;
the tail gas after the temperature reduction is absorbed or desorbed in the absorption and desorption tower, and the tail gas carrying the absorption liquid is sent to a separator;
and the separator is used for conveying the tail gas of the separated absorption liquid to the heater and the catalytic reactor.
The invention also aims to provide a treatment method of tail gas in the production of the styrene-butadiene latex with good treatment effect and standard discharge, and the aim of the invention is realized by the following technical scheme:
the method for treating the tail gas in the production of the styrene-butadiene latex comprises the following steps:
(A1) The tail gas is conveyed into an absorption tower and a desorption tower after passing through a first cooler and moves upwards;
the absorption liquid gathered at the bottom of the tower is sent to the upper part, the descending absorption liquid contacts with ascending tail gas, and organic matters in the tail gas are absorbed by the absorption liquid or the organic matters in the absorption liquid are desorbed by the tail gas;
(A2) The tail gas discharged from the tower is sent to a separator, and the tail gas and the absorption liquid are separated in the separator;
(A3) The tail gas after separating the absorption liquid is heated by a heater, the oxygen and the heated tail gas are catalyzed and oxidized in a catalytic reactor, and the generated purified gas is discharged out of the catalytic reactor.
Compared with the prior art, the invention has the following beneficial effects:
1. the concentration and flow fluctuation of the styrene-butadiene latex tail gas are diluted and buffered through the absorption and desorption towers, and the styrene-butadiene latex tail gas is efficiently purified in a catalytic oxidation mode, so that the volatile organic compounds in the styrene-butadiene latex tail gas can be efficiently removed on the premise of ensuring safety, and the styrene-butadiene latex tail gas can be ensured to reach the emission standard after being purified;
2. the invention has reasonable process, simple structure, low investment cost and low operation cost.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are only for illustrating the technical scheme of the present invention and are not intended to limit the scope of the present invention. In the figure:
fig. 1 is a flowchart of a method for treating tail gas in the production of styrene-butadiene latex according to an embodiment of the present invention.
Detailed Description
Fig. 1 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. In order to teach the technical solution of the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations or alternatives derived from these embodiments that fall within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Thus, the invention is not limited to the following alternative embodiments, but only by the claims and their equivalents.
Example 1:
the device for treating tail gas in the production of styrene-butadiene latex of the embodiment 1 of the invention comprises:
the tail gas is conveyed to the first cooler through a first circulating fan, and the tail gas cooled by the first cooler is conveyed to an absorption tower and a desorption tower;
the tail gas after the temperature reduction is absorbed or desorbed in the absorption and desorption tower: in the absorption and analysis tower, the absorption liquid gathered at the bottom is sent to the upper part, the descending absorption liquid contacts with ascending tail gas, the organic matters in the tail gas are absorbed by the absorption liquid or the organic matters in the absorption liquid are desorbed by the tail gas, and the tail gas carrying the absorption liquid is sent to a separator;
the separator is used for conveying part of tail gas of the separated absorption liquid to the first cooler through the first circulating fan and conveying part of tail gas to the heat exchanger;
the tail gas heated by the heat exchanger is sequentially transmitted to the heater and the catalytic reactor, and purified gas discharged from the catalytic reactor is cooled by the heat exchanger and then is transmitted to the second cooler;
the heater is used for heating the tail gas;
a catalytic reactor in which the tail gas is catalytically oxidized with oxygen;
the second cooler discharges a purified gas part of the second cooler to the downstream, part of the purified gas part is mixed with tail gas and air after absorbing liquid is separated, and the mixed gas is sent to the heat exchanger through a second circulating fan; part of the purified gas is communicated with the second circulating fan through a third pipeline, and a valve is arranged on the third pipeline;
the device comprises a first pipeline, a second pipeline and a third pipeline, wherein the input end of the first pipeline is communicated with the pipeline between the catalytic reactor and the heat exchanger, and the output end of the first pipeline is communicated with the pipeline between the heat exchanger and the second cooler; the input end of the second pipeline is communicated with the pipeline between the heat exchanger and the second cooler, and the output end of the second pipeline is communicated with the outlet of the second cooler;
valves provided on the first and second pipes, respectively.
Fig. 1 schematically shows a flowchart of a method for treating tail gas in the production of styrene-butadiene latex according to an embodiment of the present invention, as shown in fig. 1, wherein the method for treating tail gas in the production of styrene-butadiene latex comprises the following steps:
(A1) The tail gas is conveyed to a first cooler through a first circulating fan, cooled and then conveyed to an absorption tower and a desorption tower, and moves upwards;
the absorption liquid gathered at the bottom of the tower is sent to the upper part, the descending absorption liquid contacts with ascending tail gas, and organic matters in the tail gas are absorbed by the absorption liquid or the organic matters in the absorption liquid are desorbed by the tail gas;
(A2) The tail gas discharged from the tower is sent to a separator, and the tail gas and the absorption liquid are separated in the separator; part of the tail gas is transmitted to the first circulating fan, and the mixed part of the tail gas, the air and the purified gas discharged from the second cooler are transmitted to the heat exchanger through the second circulating fan;
(A3) The mixed gas is heated in a heat exchanger and a heater in turn, and then is sent to a catalytic reactor: the oxygen and the heated tail gas are catalyzed and oxidized in the catalytic reactor, and the generated purified gas is discharged out of the catalytic reactor;
(A4) The purified gas is sequentially transmitted to the heat exchanger and the second cooler for cooling, part of the cooled purified gas is discharged, and the other part of the cooled purified gas is transmitted to the second circulating fan;
in the working process, if the concentration of the tail gas is higher, the outlet temperature of the corresponding catalytic reactor is higher than 450 ℃, the purified gas discharged from the catalytic reactor is conveyed to the second cooler through the first pipeline to be cooled, and the purified gas does not pass through the heat exchanger;
and if the concentration of the tail gas is lower, the outlet temperature of the corresponding catalytic reactor is lower than 350 ℃, the purified gas discharged from the catalytic reactor is cooled by the heat exchanger and then is discharged to the downstream through a second pipeline, and the purified gas does not pass through the second cooler.
Example 2:
application example of the device and method for treating tail gas in the production of styrene-butadiene latex in embodiment 1 of the invention.
In the application example, the first cooler adopts chilled water at the temperature of-10 ℃ and cools the tail gas to 5 ℃; in the absorption and desorption tower, the absorption liquid at the bottom of the tower is pumped out from the top of the tower by a circulating pump to be in countercurrent contact with the tail gas of the styrene-butadiene latex, and part of butadiene and styrene in the tail gas of the styrene-butadiene latex are absorbed by the absorption liquid; the mixed gas exchanges heat to 150-350 ℃ through a heat exchanger, and enters a catalytic reactor after the temperature of the reactor is regulated to 250-350 ℃ through a heater; in the catalytic reactor, volatile organic compounds such as butadiene, styrene and the like in the tail gas of the styrene-butadiene latex undergo catalytic oxidation reaction with oxygen to be converted into carbon dioxide and water, so that high-temperature purified gas is obtained, and the temperature is 250-650 ℃. After the high-temperature purified gas enters a heat exchanger to exchange heat with the tail gas, the temperature is 150-450 ℃, the temperature is reduced to 150 ℃ by adopting circulating cooling water through a second cooler, one path of the high-temperature purified gas enters a second circulating fan to circulate back to the catalytic reactor, and the other path of the high-temperature purified gas is directly discharged through a chimney after reaching the standard.
When the concentration of organic matters in the tail gas of the styrene-butadiene latex is higher (more than or equal to 5000 mg/m) 3 ) When the outlet temperature of the catalytic reactor is higher than 45At 0 ℃, the heater is not required to be started, part of purified gas is transmitted to the second cooler through the first pipeline so as to control the temperature of tail gas entering the heater to be lower than 350 ℃, the heater is not required to be started, and the second pipeline is closed; when the concentration of organic matters in the tail gas of the styrene-butadiene latex is lower (less than 2000 mg/m) 3 ) When the outlet temperature of the catalytic reactor is lower than 350 ℃, the first pipeline is closed, the heater needs to be started to maintain the temperature of the tail gas entering the catalytic reactor to be higher than 250 ℃, the second pipeline is opened, and the purified gas is sent to the second circulating fan through the second pipeline and the third pipeline, so that the power of the heater can be effectively reduced.
In the application example, after the tail gas of the styrene-butadiene latex is treated, the purified gas can completely meet the requirements of environmental protection emission standards and can reach the emission standards. Compared with a regenerative thermal oxidation furnace (RTO) before an enterprise, the method can safely and effectively treat the tail gas of the styrene-butadiene latex with the highest concentration, and meanwhile, compared with the RTO, the method can save about 100w of operation cost for one year, effectively ensure the safe production of the enterprise, and generate very good economic benefit and environmental benefit.
Claims (3)
1. The method for treating the tail gas in the production of the styrene-butadiene latex comprises the following steps:
(A1) The tail gas is sequentially conveyed into an absorption tower and a desorption tower after passing through a first circulating fan and a first cooler, and moves upwards;
the absorption liquid gathered at the bottom of the tower is sent to the upper part, the descending absorption liquid contacts with ascending tail gas, and organic matters in the tail gas are absorbed by the absorption liquid or the organic matters in the absorption liquid are desorbed by the tail gas;
(A2) The tail gas discharged from the tower is sent to a separator, and the tail gas and the absorption liquid are separated in the separator;
(A3) The tail gas after separating the absorption liquid is heated by a heat exchanger and then is conveyed to a heater, then is conveyed to a catalytic reactor, and purified gas discharged from the catalytic reactor is cooled by the heat exchanger and then is conveyed to a second cooler;
the purified gas part discharged from the second cooler is discharged to the downstream, part of the purified gas part is mixed with tail gas and air after absorbing liquid is separated, and the mixed gas is sent to the heat exchanger by a second circulating fan;
when the concentration of organic matters in the tail gas is not lower than 5000mg/m 3 The heater need not be activated at that time.
2. The method for treating tail gas in the production of styrene-butadiene latex according to claim 1, wherein the method comprises the following steps: the processing method further comprises the following steps:
if the outlet temperature of the catalytic reactor is higher than 450 ℃, part of purified gas discharged from the catalytic reactor is conveyed to the second cooler through the first pipeline for cooling;
and if the outlet temperature of the catalytic reactor is less than 350 ℃, cooling the purified gas discharged from the catalytic reactor through the heat exchanger, and then discharging the cooled purified gas to the downstream through a second pipeline, wherein the purified gas does not pass through the second cooler.
3. The method for treating tail gas in the production of styrene-butadiene latex according to claim 1, wherein the method comprises the following steps: and sending part of the tail gas after the absorption liquid is separated and the tail gas to the first cooler through a first circulating fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811580990.5A CN109529611B (en) | 2018-12-24 | 2018-12-24 | Tail gas treatment device and method in styrene-butadiene latex production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811580990.5A CN109529611B (en) | 2018-12-24 | 2018-12-24 | Tail gas treatment device and method in styrene-butadiene latex production |
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| Publication Number | Publication Date |
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| CN109529611A CN109529611A (en) | 2019-03-29 |
| CN109529611B true CN109529611B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811580990.5A Active CN109529611B (en) | 2018-12-24 | 2018-12-24 | Tail gas treatment device and method in styrene-butadiene latex production |
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| CN110354542B (en) * | 2019-07-18 | 2021-10-26 | 广东诚铭化工科技有限公司 | Carboxylic styrene-butadiene latex degassing device and method |
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| CN102039080A (en) * | 2009-10-21 | 2011-05-04 | 中国石油化工股份有限公司 | Concentration homogenization method of hydrocarbon-containing waste gas |
| CN102233231A (en) * | 2011-07-21 | 2011-11-09 | 上海师范大学 | Purification equipment and treatment process for tail gas from acrylonitrile absorption tower |
| CN205570088U (en) * | 2016-02-17 | 2016-09-14 | 大连举扬科技股份有限公司 | A device for containing benzene tail gas is retrieved and is administered |
| RU2016127215A (en) * | 2016-07-06 | 2016-11-10 | Баир Сыдыпович Бальжинимаев | METHOD AND INSTALLATION FOR CLEANING EXHAUST GASES |
| CN207025073U (en) * | 2016-12-08 | 2018-02-23 | 中国石油化工股份有限公司 | One kind saves strong ecad catalysis oxidation emission-control equipment |
| CN209564845U (en) * | 2018-12-24 | 2019-11-01 | 杭州谱育科技发展有限公司 | The processing unit of tail gas in styrene-butadiene latex production |
-
2018
- 2018-12-24 CN CN201811580990.5A patent/CN109529611B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039080A (en) * | 2009-10-21 | 2011-05-04 | 中国石油化工股份有限公司 | Concentration homogenization method of hydrocarbon-containing waste gas |
| CN102233231A (en) * | 2011-07-21 | 2011-11-09 | 上海师范大学 | Purification equipment and treatment process for tail gas from acrylonitrile absorption tower |
| CN205570088U (en) * | 2016-02-17 | 2016-09-14 | 大连举扬科技股份有限公司 | A device for containing benzene tail gas is retrieved and is administered |
| RU2016127215A (en) * | 2016-07-06 | 2016-11-10 | Баир Сыдыпович Бальжинимаев | METHOD AND INSTALLATION FOR CLEANING EXHAUST GASES |
| CN207025073U (en) * | 2016-12-08 | 2018-02-23 | 中国石油化工股份有限公司 | One kind saves strong ecad catalysis oxidation emission-control equipment |
| CN209564845U (en) * | 2018-12-24 | 2019-11-01 | 杭州谱育科技发展有限公司 | The processing unit of tail gas in styrene-butadiene latex production |
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