CN111318146A - Method for treating waste gas of purified terephthalic acid sewage farm - Google Patents
Method for treating waste gas of purified terephthalic acid sewage farm Download PDFInfo
- Publication number
- CN111318146A CN111318146A CN201811524297.6A CN201811524297A CN111318146A CN 111318146 A CN111318146 A CN 111318146A CN 201811524297 A CN201811524297 A CN 201811524297A CN 111318146 A CN111318146 A CN 111318146A
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- CN
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- Prior art keywords
- waste gas
- enters
- ultraviolet photolysis
- ultraviolet
- terephthalic acid
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- 239000002912 waste gas Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000010865 sewage Substances 0.000 title claims abstract description 15
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 title claims description 21
- 238000005406 washing Methods 0.000 claims abstract description 13
- 238000006303 photolysis reaction Methods 0.000 claims abstract description 11
- 230000015843 photosynthesis, light reaction Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000007791 dehumidification Methods 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 5
- 150000001555 benzenes Chemical class 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 5
- 244000005700 microbiome Species 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 230000004060 metabolic process Effects 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims 1
- 239000003513 alkali Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000002503 metabolic effect Effects 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
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
- B01D53/75—Multi-step processes
-
- 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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- 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
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Abstract
The invention belongs to the technical field of waste gas treatment, and particularly relates to a method for treating waste gas generated by a PTA sewage field. The invention adopts the combined processes of alkali washing, biological filter, ultraviolet photolysis, water washing and active carbon to treat the waste gas generated by the PTA sewage treatment field, and adds a dehumidification and demisting pretreatment facility before the ultraviolet photolysis process, so that the ultraviolet photolysis system is subjected to oxidation reaction under the conditions of optimal temperature and humidity. Compared with the prior art, the invention has the beneficial effects that: through a complete set of combined treatment process, each index of the waste gas of the PTA sewage farm which is difficult to treat reaches the latest emission standard (national standard GB 31571-2015 and Shanghai local standard DB 31/1025-2016).
Description
Technical Field
The invention relates to a method for treating waste gas of a purified terephthalic acid sewage farm, and belongs to the technical field of waste gas treatment.
Background
The main components of the waste gas generated by a Pure Terephthalic Acid (PTA) waste water treatment field comprise hydrogen sulfide, ammonia, methane, methyl mercaptan, methyl sulfide, dimethyl disulfide, benzene, toluene, xylene, vinyl acetate and the like. Generally, the non-methane total hydrocarbon concentration is less than 300mg/m3, the hydrogen sulfide concentration is less than 30mg/m3, the ammonia is less than 8mg/m3, the benzene series is less than 30mg/m3, the odor concentration is less than 5000mg/m3, and the benzene series is more difficult to treat.
Common PTA waste gas treatment techniques are: combustion, chemical oxidation, condensation, adsorption, absorption, bio-trickling filtration, plasma, etc.
The combustion method utilizes combustion to oxidize pollutant components in the waste gas, but has the problems of excessive nitrogen oxides and high investment and operation cost. The chemical oxidation method, the condensation method and the adsorption method have selectivity, cannot reach the standard comprehensively, and simultaneously have high operation cost, and the biotrickling filtration method utilizes the metabolism of microorganisms attached to the filler to degrade waste gas, has general treatment effect and cannot directly reach the standard and discharge; the plasma method utilizes active groups generated by high-voltage discharge to oxidize pollutants, but has potential safety hazard factors in operation.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for treating waste gas of a purified terephthalic acid sewage plant, which comprises the steps of firstly adopting an alkali washing method, carrying out chemical neutralization and adsorbing acid components in the waste gas by circulating alkali liquor spraying and waste gas convection contact; removing easily degradable organic matter components by a biological method through a biological filter; after the pretreatment facility of dehumidification and demisting, the ultraviolet photolysis method is used for opening the molecular bond of the pollutant by utilizing high-energy photons of an ultraviolet light source, and simultaneously generating a large amount of active oxygen atoms and hydroxyl radicals to oxidize and purify the pollutant; and finally, thoroughly removing residual organic matters and ozone by utilizing circulating spray washing and activated carbon adsorption of a washing tower.
The technical solution of the invention is as follows:
a method for treating waste gas of a purified terephthalic acid sewage farm comprises the following specific steps:
step 1) covering each sewage pool, and collecting waste gas through a waste gas pipeline;
the waste gas collected in the step 2) enters an alkaline washing tower under the suction of a rear draught fan, and is sprayed and alkaline washed by a circulating spray pump, so that acidic gas in the waste gas is neutralized and enters a biological filter to be in contact with microorganisms on the filler for metabolism, and organic matters in the waste gas are degraded and converted into carbon dioxide and water;
step 3) the waste gas enters a dehumidification and demisting pretreatment and then enters an ultraviolet photolysis reactor for ultraviolet photolysis treatment, and benzene series and other residual organic matters in the waste gas are further decomposed and oxidized into carbon dioxide and water;
and 4) entering a water washing tower and an active carbon adsorption device to further dissolve and adsorb residual organic matter components, further reacting to consume the oxidation reaction which is not completed in the previous step, and finally discharging through a discharge cylinder.
In the step 2), 30% sodium hydroxide solution is added into the alkaline tower, and the pH value is controlled to be 10-13.
In the step 3), the humidity of the exhaust gas is controlled to be less than 72.5% and the temperature is controlled to be less than 45 ℃ by the dehumidification and demisting pretreatment facility.
In the step 3), an ultraviolet light source in the ultraviolet photolysis reactor emits 172nm ultraviolet light.
Step 2) resistance <2200 pa.
The acid gas in step 2) is hydrogen sulfide.
Compared with the prior art, the invention has the beneficial effects that:
1) the comprehensive removal and standard reaching of the pollutant components of the waste gas are realized through the combination, complementation and mutual matching of a plurality of processes.
2) The high-energy radiation ultraviolet light of 172nm is utilized to ensure that enough energy is available to open the molecular bond of the benzene series.
3) The operation is simple, the maintenance is convenient, the investment and the operation cost are low, and no safety risk exists.
Drawings
FIG. 1 is a flow chart of the method for treating the waste gas of the purified terephthalic acid sewage farm according to the present invention.
Detailed Description
The invention will now be further described by way of specific embodiments
In the embodiments (1-5) and the comparative examples (1-2), the exhaust gas is generated by a PTA sewage treatment field of a petrochemical enterprise, and the intake gas comprises the following components:
the waste gas amount is 20000m3/h
The temperature is 40-60 DEG C
Humidity is more than 95%
13-300 mg/m3 of non-methane total hydrocarbon
2-50 mg/m3 of hydrogen sulfide
0.5-2 mg/m3 of ammonia
3-30 mg/m3 of benzene
The concentration of the odor is 4000-10000
Example [ 1 to 5 ]
Waste gas generated by the PTA sewage field enters an alkaline washing tower through a waste gas collecting pipeline under the suction of a rear draught fan, the spraying alkaline washing is carried out by utilizing a circulating spray pump, 30% liquid caustic soda is added into a water collecting tank of the alkaline washing tower, and then the waste gas enters a biological filter and contacts with microorganisms on a filler for metabolic degradation. Then the waste gas is condensed, demisted, dried and dehumidified, enters an ultraviolet photolysis reactor, is decomposed under the bombardment of high-energy ultraviolet photons and the oxidation of active oxygen atoms and hydroxyl free radicals, then enters a water washing tower and an active carbon adsorption device to further adsorb residual organic components, simultaneously, the oxidation reaction which is not completed in the last step is further consumed in further reaction, and finally, the waste gas is discharged through a 30-meter high-discharge cylinder.
Comparative example [ 1-2 ]
Waste gas generated by the PTA sewage field passes through a waste gas collecting pipeline, enters the biological trickling filter under the suction of a rear draught fan, is sprayed and washed by a circulating spray pump, then enters the biological filter, is in contact with microorganisms on a filler for metabolic degradation, and is discharged through a 30-meter high discharge cylinder.
The gas inlet conditions, process conditions and gas outlet data in each example and comparative example are shown in tables 1 and 2.
TABLE 1
TABLE 2
Claims (6)
1. A method for treating waste gas of a purified terephthalic acid sewage farm is characterized by comprising the following steps:
step 1) covering each sewage pool, and collecting waste gas through a waste gas pipeline;
the waste gas collected in the step 2) enters an alkaline washing tower under the suction of a rear draught fan, and is sprayed and alkaline washed by a circulating spray pump, so that acidic gas in the waste gas is neutralized and enters a biological filter to be in contact with microorganisms on the filler for metabolism, and organic matters in the waste gas are degraded and converted into carbon dioxide and water;
step 3) the waste gas enters a dehumidification and demisting pretreatment and then enters an ultraviolet photolysis reactor for ultraviolet photolysis treatment, and benzene series and other residual organic matters in the waste gas are further decomposed and oxidized into carbon dioxide and water;
and 4) entering a water washing tower and an active carbon adsorption device to further dissolve and adsorb residual organic matter components, further reacting to consume the oxidation reaction which is not completed in the previous step, and finally discharging through a discharge cylinder.
2. The method as claimed in claim 1, wherein in the step 2), 30% sodium hydroxide solution is added into the alkaline tower to control the pH value to be 10-13.
3. The method as claimed in claim 1, wherein the dehumidifying and demisting pre-treatment facility controls the humidity of the waste gas to be less than 72.5% and the temperature to be less than 45 ℃ in the step 3).
4. The method as claimed in claim 1, wherein the ultraviolet light source in the ultraviolet photolysis reactor emits 172nm ultraviolet light in the step 3).
5. The method of claim 1, wherein the resistance in step 2) is <2200 pa.
6. The method as claimed in claim 1, wherein the acidic gas in step 2) is hydrogen sulfide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524297.6A CN111318146A (en) | 2018-12-13 | 2018-12-13 | Method for treating waste gas of purified terephthalic acid sewage farm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524297.6A CN111318146A (en) | 2018-12-13 | 2018-12-13 | Method for treating waste gas of purified terephthalic acid sewage farm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111318146A true CN111318146A (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811524297.6A Pending CN111318146A (en) | 2018-12-13 | 2018-12-13 | Method for treating waste gas of purified terephthalic acid sewage farm |
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| CN (1) | CN111318146A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113713589A (en) * | 2021-09-02 | 2021-11-30 | 无锡华光环保能源集团股份有限公司 | Advanced treatment method of high-sulfur ammonia organic waste gas |
| WO2022192950A1 (en) * | 2021-03-16 | 2022-09-22 | Iron Salt Aerosol Pty Ltd | System and method to reduce greenhouse gases |
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| DE102012000206A1 (en) * | 2011-10-11 | 2013-04-11 | IBL Umwelt- und Biotechnik GmbH | Process for fluid purification, preferably of organic compounds |
| CN103691268A (en) * | 2013-12-25 | 2014-04-02 | 华纺股份有限公司 | Method and device for treating waste gas generated by printing and dyeing wastewater |
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| CN207203825U (en) * | 2017-08-18 | 2018-04-10 | 安徽省科林环境生物技术有限公司 | A kind of beer waste water foul smell puies forward mark processing system |
| CN107970760A (en) * | 2017-12-30 | 2018-05-01 | 杭州楚天科技有限公司 | A kind of papermaking wastewater station waste gas treatment process |
| CN207641265U (en) * | 2017-12-08 | 2018-07-24 | 浙江旺能生态科技有限公司 | A kind of deodoration system of kitchen pretreatment workshop |
-
2018
- 2018-12-13 CN CN201811524297.6A patent/CN111318146A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012000206A1 (en) * | 2011-10-11 | 2013-04-11 | IBL Umwelt- und Biotechnik GmbH | Process for fluid purification, preferably of organic compounds |
| CN102921256A (en) * | 2012-11-14 | 2013-02-13 | 瓮福（集团）有限责任公司 | Powdery monoammonium phosphate offgas pickling dust removal process changed from sedimentation dust removal process |
| CN103691268A (en) * | 2013-12-25 | 2014-04-02 | 华纺股份有限公司 | Method and device for treating waste gas generated by printing and dyeing wastewater |
| CN105983334A (en) * | 2015-02-16 | 2016-10-05 | 江苏朗逸环保科技有限公司 | Foul gas purifying treatment system and method |
| CN207203825U (en) * | 2017-08-18 | 2018-04-10 | 安徽省科林环境生物技术有限公司 | A kind of beer waste water foul smell puies forward mark processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022192950A1 (en) * | 2021-03-16 | 2022-09-22 | Iron Salt Aerosol Pty Ltd | System and method to reduce greenhouse gases |
| CN113713589A (en) * | 2021-09-02 | 2021-11-30 | 无锡华光环保能源集团股份有限公司 | Advanced treatment method of high-sulfur ammonia organic waste gas |
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Application publication date: 20200623 |