CN116492841A - Novel styrene waste gas treatment process and device thereof - Google Patents
Novel styrene waste gas treatment process and device thereof Download PDFInfo
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- CN116492841A CN116492841A CN202310511107.1A CN202310511107A CN116492841A CN 116492841 A CN116492841 A CN 116492841A CN 202310511107 A CN202310511107 A CN 202310511107A CN 116492841 A CN116492841 A CN 116492841A
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- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 239000002912 waste gas Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- DTUQWGWMVIHBKE-UHFFFAOYSA-N phenylacetaldehyde Chemical compound O=CCC1=CC=CC=C1 DTUQWGWMVIHBKE-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000001179 sorption measurement Methods 0.000 claims abstract description 26
- 239000002250 absorbent Substances 0.000 claims abstract description 24
- 230000002745 absorbent Effects 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 24
- AWMVMTVKBNGEAK-UHFFFAOYSA-N Styrene oxide Chemical compound C1OC1C1=CC=CC=C1 AWMVMTVKBNGEAK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229940100595 phenylacetaldehyde Drugs 0.000 claims abstract description 14
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 89
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 6
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000008096 xylene Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 claims description 2
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000002114 nanocomposite Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011152 fibreglass Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
- B01D53/34—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
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
-
- 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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a novel styrene waste gas treatment process and a device thereof, which relate to the technical field of styrene waste gas treatment, and the technical scheme is that the method comprises the following steps: s1, introducing low-concentration styrene waste gas into a styrene conversion device to convert the low-concentration styrene waste gas into high-concentration styrene gas; s2, introducing the obtained high-concentration styrene gas and ozone into a catalyst adsorption tower, and reacting to obtain styrene oxide; s3, adsorbing the obtained styrene oxide by using an organic absorbent; s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde. The beneficial effects of the invention are as follows: the existing unstable styrene waste gas working condition is converted into stable styrene gas through the styrene conversion device, and the uncertainty brought to styrene waste gas collection by enterprises due to complex workshop production environments is solved.
Description
Technical Field
The invention relates to the technical field of environmental pollution treatment, in particular to a novel styrene waste gas treatment process and a device thereof.
Background
The application field of glass fiber reinforced plastic products in China is expanded continuously, and the original aerospace ablation-resistant heat-resistant parts are developed to the fields of national economy such as aerospace, aviation, ships, transportation (new energy automobiles), wind power generation, construction, energy, chemical industry, energy conservation and environmental protection, electronic appliances, medical treatment, sports equipment and the like, so that the development trend of the composite material industry is good, and the main production process comprises winding, vacuum pouring, mould pressing, hand pasting and the like. Although various enterprises take measures of adding equipment and the like, the discharge standard of glass fiber reinforced plastic enterprises is 20mg/m according to the discharge standard of volatile organic compounds 3 The execution standard is higher, firstly, the problems of incomplete waste gas absorption, reduced catalyst and adsorption material processing capacity and the like in a working area occur along with the increase of the operation hours of environmental protection equipment of enterprises, and the environmental protection monitoring is unqualified; secondly, the cost is higher in the running process of the environment-friendly equipment.
Phenylacetaldehyde is an important chemical product in industry and has wide use value. The conversion of styrene exhaust gas into phenylacetaldehyde creates important economic value for enterprises. However, at present, the working condition of producing styrene is large air quantity, low concentration and intermittent discharge, so that the problem of converting styrene waste gas into phenylacetaldehyde under the working condition is large, the conversion rate is low, the utilization rate of equipment and industrial adsorption conversion reagent is low, the method becomes a difficult problem puzzling glass fiber reinforced plastic production enterprises, and the improvement of the prior art is needed to solve the difficult problem.
Disclosure of Invention
In order to achieve the above-mentioned aim, the present invention provides a novel styrene waste gas treatment process and a device thereof.
The method comprises the following steps:
s1, introducing low-concentration styrene waste gas into a styrene conversion device to convert the low-concentration styrene waste gas into high-concentration styrene gas;
s2, introducing the high-concentration styrene gas and ozone obtained in the step S1 into a catalyst adsorption tower, and reacting to obtain styrene oxide;
s3, adsorbing the styrene oxide obtained in the step S2 by using an organic absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde;
the concentration range of the low-concentration styrene in the S1 is 100-500mg/m 3 The concentration of the high-concentration styrene gas is 1000-5000mg/m 3 。
The catalyst in the catalyst adsorption tower is a modified activated carbon loaded nano-composite metal oxide catalyst, and the loading capacity is 2-5%.
The ozone concentration is 500-700mg/m 3 。
The organic absorbent is one of mesitylene, dimethylbenzene, styrene and chlorobenzene.
And the catalyst and the organic absorbent in the catalyst absorption tower are recycled.
The styrene conversion device comprises a condensing tank and a heating tank, wherein a connecting pipeline and a condensate circulating pipeline are communicated between the condensing tank and the heating tank;
the low-concentration styrene waste gas enters a condensing tank from one end of the connecting pipeline, and enters a catalyst adsorption tower from one end of the heating tank through the connecting pipeline;
the connecting pipeline comprises an air inlet pipe arranged at one end of the condensing tank, a connecting pipe for communicating the other end of the condensing tank with one end of the heating tank and an air outlet pipe arranged at the other end of the heating tank;
the air inlet pipe is communicated with the inner cavity of the condensing tank, the connecting pipes are respectively communicated with the inner cavities of the condensing tank and the heating tank, and the air outlet pipe is communicated with the inner cavity of the heating tank.
The top of the condensing tank is provided with a condensing tank inlet, the bottom of the condensing tank is provided with a condensing tank outlet, the bottom of the heating tank is provided with a heating tank inlet, and the top of the heating tank is provided with a heating tank outlet;
the condensate circulating pipeline comprises two sections of coils respectively arranged in the inner cavities of the condensing tank and the heating tank, a first circulating pipeline connecting the outlet of the condensing tank and the inlet of the heating tank, and a second circulating pipeline connecting the outlet of the heating tank and the inlet of the condensing tank;
an exhaust port is arranged at one side of the top of the condensing tank;
a refrigerating machine is arranged on the second circulating pipeline of the condensate circulating pipeline;
the condensate circulating pipeline is internally provided with condensate, two ends of the first circulating pipeline are respectively communicated with one ends of coils in the condensing tank and the heating tank, and two ends of the second circulating pipeline are respectively communicated with the other ends of coils in the condensing tank and the heating tank to form a circulating pipeline.
In order to solve the technical problems, the invention further provides a styrene conversion device:
the device comprises a condensing tank and a heating tank, wherein a connecting pipeline and a condensate circulating pipeline are communicated between the condensing tank and the heating tank;
the low-concentration styrene waste gas enters a condensing tank from one end of the connecting pipeline, and enters a catalyst adsorption tower from one end of the heating tank through the connecting pipeline;
the connecting pipeline comprises an air inlet pipe arranged at one end of the condensing tank, a connecting pipe for communicating the other end of the condensing tank with one end of the heating tank and an air outlet pipe arranged at the other end of the heating tank;
the air inlet pipe is communicated with the inner cavity of the condensing tank, the connecting pipes are respectively communicated with the inner cavities of the condensing tank and the heating tank, and the air outlet pipe is communicated with the inner cavity of the heating tank.
The top of the condensing tank is provided with a condensing tank inlet, the bottom of the condensing tank is provided with a condensing tank outlet, the bottom of the heating tank is provided with a heating tank inlet, and the top of the heating tank is provided with a heating tank outlet;
the condensate circulating pipeline comprises two sections of coils respectively arranged in the inner cavities of the condensing tank and the heating tank, a first circulating pipeline connecting the outlet of the condensing tank and the inlet of the heating tank, and a second circulating pipeline connecting the outlet of the heating tank and the inlet of the condensing tank;
an inclined baffle plate is fixedly arranged at the bottom of the inner cavity of the condensing tank, the lower end of the upper surface of the inclined baffle plate is positioned below the end part of the connecting pipe, the bottom of the coil pipe penetrates through the inclined baffle plate, and a gap at the joint of the coil pipe and the inclined baffle plate is sealed;
the bottom of the inner cavity of the heating tank is fixedly provided with a horizontal diaphragm, the upper surface of the diaphragm is positioned below the end part of the connecting pipe, the bottom of the coil penetrates through the diaphragm, and a gap at the joint of the coil and the diaphragm is sealed;
an exhaust port is arranged at one side of the top of the condensing tank;
a refrigerating machine is arranged on the second circulating pipeline of the condensate circulating pipeline;
the condensate circulating pipeline is internally provided with condensate, two ends of the first circulating pipeline are respectively communicated with one ends of coils in the condensing tank and the heating tank, and two ends of the second circulating pipeline are respectively communicated with the other ends of coils in the condensing tank and the heating tank to form a circulating pipeline.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
1. the existing unstable styrene waste gas working condition is converted into stable styrene gas through the styrene conversion device, so that uncertainty brought to styrene waste gas collection by enterprises due to complex workshop production environments is solved;
2. the stable high-concentration styrene gas is adopted, so that the utilization efficiency of equipment such as a catalyst tower, ozone and the like and raw materials is improved;
3. the conversion of phenylacetaldehyde is improved because of the stable styrene input with high concentration.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a styrene conversion device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a condensate circulating pipeline of a styrene conversion device according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of the bottom of a condensing tank and a heating tank according to an embodiment of the present invention.
Wherein, the reference numerals are as follows: 1. a condensing tank; 2. a heating tank; 301. an air inlet pipe; 302. a connecting pipe; 303. an air outlet pipe; 101. an inlet of the condensing tank; 102. an outlet of the condensing tank; 201. an inlet of the heating tank; 202. a heating tank outlet; 401. a first circulating pipeline; 402. a second circulation pipeline; 403. a coiled pipe; 5. a refrigerating machine; 103. and an exhaust port.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.
Comparative example 1
S1, 300mg/m 3 Low concentration styrene offgas and 300mg/m 3 Ozone with concentration is introduced into a catalyst adsorption tower, and the catalyst in the catalyst adsorption tower is modified activated carbon loaded nano-MnO 2 /Ce 2 O 3 The catalyst loading was 3%. Obtaining styrene oxide after reaction;
s3, adsorbing the styrene oxide obtained in the step S2 by using a xylene absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
Comparative example 2
S1, 500mg/m 3 Low concentration styrene offgas and 500mg/m 3 Ozone with concentration is introduced into a catalyst adsorption tower, and the catalyst in the catalyst adsorption tower is modified activated carbon loaded nano-MnO 2 /Ce 2 O 3 The catalyst loading was 2%. Obtaining styrene oxide after reaction;
s3, adsorbing the styrene oxide obtained in the step S2 by using a xylene absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
Example 1
A styrene conversion device:
the device comprises a condensation tank 1 and a heating tank 2, wherein a connecting pipeline and a condensate circulating pipeline are communicated between the condensation tank 1 and the heating tank 2;
the low-concentration styrene waste gas enters the condensing tank 1 from one end of a connecting pipeline, and enters the catalyst adsorption tower from one end of the heating tank 2 through the connecting pipeline;
the connecting pipeline comprises an air inlet pipe 301 arranged at one end of the condensing tank 1, a connecting pipe 302 which is communicated with the other end of the condensing tank 1 and one end of the heating tank 2, and an air outlet pipe 303 arranged at the other end of the heating tank 2;
the air inlet pipe 301 is communicated with the inner cavity of the condensation tank 1, the connecting pipe 302 is respectively communicated with the inner cavities of the condensation tank 1 and the heating tank 2, and the air outlet pipe 303 is communicated with the inner cavity of the heating tank 2.
The top of the condensing tank 1 is provided with a condensing tank inlet 101, the bottom of the condensing tank 1 is provided with a condensing tank outlet 102, the bottom of the heating tank 2 is provided with a heating tank inlet 201, and the top of the heating tank 2 is provided with a heating tank outlet 202;
the condensate circulating pipeline comprises two sections of coils 403 respectively arranged in the inner cavities of the condensing tank 1 and the heating tank 2, a first circulating pipeline 401 connecting the condensing tank outlet 102 and the heating tank inlet 201 and a second circulating pipeline 402 connecting the heating tank outlet 202 and the condensing tank inlet 101;
an exhaust port 103 is arranged on one side of the top of the condensation tank 1;
a second circulation pipeline 402 of the condensate circulation pipeline is provided with a refrigerator 5;
the condensate circulating pipeline is provided with condensate, two ends of a first circulating pipeline 401 are respectively communicated with one ends of coils 403 in the condensing tank 1 and the heating tank 2, and two ends of a second circulating pipeline 402 are respectively communicated with the other ends of the coils 403 in the condensing tank 1 and the heating tank 2 to form a circulating pipeline.
The low-concentration styrene waste gas enters the cavity of the condensing tank 1 through the air inlet pipe 301, condensate in the coil pipe 403 condenses the low-concentration styrene waste gas, the condensate is separated from air after the condensation of the styrene, the air is discharged through the air outlet 103, liquid styrene enters the cavity of the heating tank 2 through the connecting pipe 302, condensate after the condensation of the styrene also enters the coil pipe 403 of the heating tank 2 through the first circulating pipeline 401, the styrene in the cavity of the heating tank 2 is heated, the styrene is directly heated to become gas, and the gas enters the next link through the air outlet pipe 303.
Example 2
S1, 100mg/m 3 Introducing the concentration styrene waste gas into a styrene conversion device to convert into 1000mg/m 3 A concentration of styrene gas;
s2, mixing the high-concentration styrene gas obtained in the step S1 with 500mg/m 3 Ozone is introduced into a catalyst adsorption tower, wherein the catalyst in the catalyst adsorption tower is modified activated carbon loaded nano-MnO 2 /Ce 2 O 3 The catalyst has a loading capacity of 2%, and styrene oxide is obtained after the reaction;
s3, adsorbing the styrene oxide obtained in the step S2 by using a trimethylbenzene absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
Example 3
S1, 300mg/m 3 Introducing the concentration styrene waste gas into a styrene conversion device to convert into 3000mg/m 3 A concentration of styrene gas;
s2, mixing the high-concentration styrene gas obtained in the step S1 with 600mg/m 3 Ozone is introduced into a catalyst adsorption tower, wherein the catalyst in the catalyst adsorption tower is modified activated carbon loaded nano-MnO 2 /Ce 2 O 3 The catalyst has a loading capacity of 3%, and styrene oxide is obtained after the reaction;
s3, adsorbing the styrene oxide obtained in the step S2 by using a trimethylbenzene absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
Example 4
S1, 500mg/m 3 Introducing the concentration styrene waste gas into a styrene conversion device to convert into 5000mg/m 3 A concentration of styrene gas;
s2, mixing the high-concentration styrene gas obtained in the step S1 with 700mg/m 3 Ozone is introduced into a catalyst adsorption tower, wherein the catalyst in the catalyst adsorption tower is modified activated carbon loaded nano-MnO 2 /Ce 2 O 3 The catalyst has 5 percent of load, and styrene oxide is obtained after the reaction;
s3, adsorbing the styrene oxide obtained in the step S2 by using a trimethylbenzene absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
Example 5
S1, 500mg/m 3 Introducing the concentration styrene waste gas into a styrene conversion device to convert into 5000mg/m 3 A concentration of styrene gas;
s2, mixing the high-concentration styrene gas obtained in the step S1 with 700mg/m 3 Ozone is introduced into a catalyst adsorption tower, wherein the catalyst in the catalyst adsorption tower is modified activated carbon loaded nano-MnO 2 /Ce 2 O 3 The catalyst has 5 percent of load, and styrene oxide is obtained after the reaction;
s3, adsorbing the styrene oxide obtained in the step S2 by using a xylene absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
Example 6
S1, 500mg/m 3 Introducing the concentration styrene waste gas into a styrene conversion device to convert into 5000mg/m 3 A concentration of styrene gas;
s2, mixing the high-concentration styrene gas obtained in the step S1 with 700mg/m 3 Ozone is introduced into a catalyst adsorption tower, wherein the catalyst in the catalyst adsorption tower is modified activated carbon loaded nano-MnO 2 /Ce 2 O 3 The catalyst has 5 percent of load, and styrene oxide is obtained after the reaction;
s3, adsorbing the styrene oxide obtained in the step S2 by using a chlorobenzene absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
According to the yield of benzaldehyde tested:
from the data, the conversion rate of the benzaldehyde can be obviously improved by improving the process, so that the utilization rate of equipment, catalysts and the like is effectively improved, the problems of enterprises are solved, and the cost is saved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The novel styrene waste gas treatment process is characterized by comprising the following steps of:
s1, introducing low-concentration styrene waste gas into a styrene conversion device to convert the low-concentration styrene waste gas into high-concentration styrene gas;
s2, introducing the high-concentration styrene gas and ozone obtained in the step S1 into a catalyst adsorption tower, and reacting to obtain styrene oxide;
s3, adsorbing the styrene oxide obtained in the step S2 by using an organic absorbent;
s4, recovering the saturated organic absorbent, and distilling and purifying to obtain phenylacetaldehyde.
2. The novel styrene waste gas treatment process according to claim 1, wherein the concentration of the low-concentration styrene in S1 is 100-500mg/m 3 The concentration of the high-concentration styrene gas is 1000-5000mg/m 3 。
3. The novel styrene waste gas treatment process according to claim 1, wherein the catalyst in the catalyst adsorption tower is a modified activated carbon supported nano-composite metal oxide catalyst, and the supported amount is 2-5%.
4. The novel styrene offgas treatment process according to claim 1, wherein the ozone concentration is 500-700mg/m 3 。
5. The novel styrene waste gas treatment process according to claim 1, wherein the organic absorbent is one of mesitylene, xylene, styrene and chlorobenzene.
6. The novel styrene waste gas treatment process according to claim 1, wherein the catalyst and the organic absorbent in the catalyst absorption tower are recycled.
7. The novel styrene waste gas treatment process according to claim 1, wherein the styrene conversion device comprises a condensation tank (1) and a heating tank (2), and a connecting pipeline and a condensate circulating pipeline are communicated between the condensation tank (1) and the heating tank (2);
the low-concentration styrene waste gas enters a condensing tank (1) from one end of the connecting pipeline, and enters a catalyst adsorption tower from one end of a heating tank (2) through the connecting pipeline;
the connecting pipeline comprises an air inlet pipe (301) arranged at one end of the condensing tank (1), a connecting pipe (302) communicated with the other end of the condensing tank (1) and one end of the heating tank (2) and an air outlet pipe (303) arranged at the other end of the heating tank (2);
the air inlet pipe (301) is communicated with the inner cavity of the condensing tank (1), the connecting pipe (302) is respectively communicated with the inner cavities of the condensing tank (1) and the heating tank (2), and the air outlet pipe (303) is communicated with the inner cavity of the heating tank (2).
8. The styrene conversion device according to claim 6, wherein a condensing tank inlet (101) is arranged at the top of the condensing tank (1), a condensing tank outlet (102) is arranged at the bottom of the condensing tank (1), a heating tank inlet (201) is arranged at the bottom of the heating tank (2), and a heating tank outlet (202) is arranged at the top of the heating tank (2);
the condensate circulating pipeline comprises two sections of coils (403) which are respectively arranged in the inner cavities of the condensing tank (1) and the heating tank (2), a first circulating pipeline (401) which is connected with the outlet (102) of the condensing tank and the inlet (201) of the heating tank, and a second circulating pipeline (402) which is connected with the outlet (202) of the heating tank and the inlet (101) of the condensing tank;
an inclined baffle plate (104) is fixedly arranged at the bottom of the inner cavity of the condensing tank (1), the lower end of the upper surface of the inclined baffle plate (104) is positioned below the end part of the connecting pipe (302), the bottom of the coil pipe (403) penetrates through the inclined baffle plate (104), and a gap at the joint of the coil pipe (403) and the inclined baffle plate (104) is sealed;
a horizontal diaphragm plate (204) is fixedly arranged at the bottom of the inner cavity of the heating tank (2), the upper surface of the diaphragm plate (204) is positioned below the end part of the connecting pipe (302), the bottom of the coil pipe (403) penetrates through the diaphragm plate (204), and a gap at the joint of the coil pipe (403) and the diaphragm plate (204) is sealed;
an exhaust port (103) is formed in one side of the top of the condensing tank (1);
a refrigerating machine (5) is arranged on the second circulating pipeline (402) of the condensate circulating pipeline;
the condensate circulating pipeline is internally provided with condensate, two ends of a first circulating pipeline (401) are respectively communicated with one ends of coils (403) in the condensing tank (1) and the heating tank (2), and two ends of a second circulating pipeline (402) are respectively communicated with the other ends of coils (403) in the condensing tank (1) and the heating tank (2) to form a circulating pipeline.
9. The styrene conversion device is characterized by comprising a condensing tank (1) and a heating tank (2), wherein a connecting pipeline and a condensate circulating pipeline are communicated between the condensing tank (1) and the heating tank (2);
the low-concentration styrene waste gas enters a condensing tank (1) from one end of the connecting pipeline, and enters a catalyst adsorption tower from one end of a heating tank (2) through the connecting pipeline;
the connecting pipeline comprises an air inlet pipe (301) arranged at one end of the condensing tank (1), a connecting pipe (302) communicated with the other end of the condensing tank (1) and one end of the heating tank (2) and an air outlet pipe (303) arranged at the other end of the heating tank (2);
the air inlet pipe (301) is communicated with the inner cavity of the condensing tank (1), the connecting pipe (302) is respectively communicated with the inner cavities of the condensing tank (1) and the heating tank (2), and the air outlet pipe (303) is communicated with the inner cavity of the heating tank (2).
10. The styrene conversion device according to claim 8, wherein a condensing tank inlet (101) is provided at the top of the condensing tank (1), a condensing tank outlet (102) is provided at the bottom of the condensing tank (1), a heating tank inlet (201) is provided at the bottom of the heating tank (2), and a heating tank outlet (202) is provided at the top of the heating tank (2);
the condensate circulating pipeline comprises two sections of coils (403) which are respectively arranged in the inner cavities of the condensing tank (1) and the heating tank (2), a first circulating pipeline (401) which is connected with the outlet (102) of the condensing tank and the inlet (201) of the heating tank, and a second circulating pipeline (402) which is connected with the outlet (202) of the heating tank and the inlet (101) of the condensing tank;
an exhaust port (103) is formed in one side of the top of the condensing tank (1);
a refrigerating machine (5) is arranged on the second circulating pipeline (402) of the condensate circulating pipeline;
the condensate circulating pipeline is internally provided with condensate, two ends of a first circulating pipeline (401) are respectively communicated with one ends of coils (403) in the condensing tank (1) and the heating tank (2), and two ends of a second circulating pipeline (402) are respectively communicated with the other ends of coils (403) in the condensing tank (1) and the heating tank (2) to form a circulating pipeline.
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| CN212188194U (en) * | 2020-04-02 | 2020-12-22 | 深圳市欧耐新材股份有限公司 | Coating organic waste gas treatment device |
| CN115282965A (en) * | 2022-10-09 | 2022-11-04 | 山东格瑞德环保科技有限公司 | Application of catalyst in treatment of styrene waste gas |
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| JPS61151145A (en) * | 1984-12-24 | 1986-07-09 | Daicel Chem Ind Ltd | Production of phenylacetaldehyde |
| EP1275429A1 (en) * | 2001-07-10 | 2003-01-15 | Commissariat à l'Energie Atomique | Process and device for the capture of vapors contained in a gas effluent |
| CN103288611A (en) * | 2012-02-29 | 2013-09-11 | 中国石油化工股份有限公司 | Method for oxidizing styrene |
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