CN104645798A - Method for treating organic waste gas in chemical plant - Google Patents
Method for treating organic waste gas in chemical plant Download PDFInfo
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- CN104645798A CN104645798A CN201510124060.9A CN201510124060A CN104645798A CN 104645798 A CN104645798 A CN 104645798A CN 201510124060 A CN201510124060 A CN 201510124060A CN 104645798 A CN104645798 A CN 104645798A
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- exhaust gas
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- 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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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for treating organic waste gas in a chemical plant. The organic waste gas sequentially pass through a flowmeter, a flow regulating valve, a concentration monitor, a dust removal flame-retardant device, an air inlet fan, a heat exchanger, a catalyst chamber, an exhaust fan, an alkaline tower, a humidifier, a biological active packing layer containing scrap iron, a 1# electrode, a 2# electrode, a 3# electrode, a 4# electrode, a circulating water system, a thermostat, a spraying system, a three-way valve and a biological filter. According to the method, the concentration of the organic waste gas can be regulated into a proper concentration range of the waste gas treatment system. According to the method, different waste gas treatment methods can be selected according to the concentration of the organic waste gas. In the biological treatment section of the method, acidic substances in the waste gas are removed by adopting an alkali washing method, and the condition that the biological activity is influenced in the biological filter is avoided; and in the biological treatment section of the method, the scrap iron is contained in the packing, the packing is stirred periodically by utilizing the variable electrode magnetism, the phenomena that the gas flow is influenced due to blockage and the reaction is non-uniform are avoided, a stirrer can be replaced, and the inner reaction space is saved.
Description
Technical field
The present invention relates to a kind of method processing chemical plant organic exhaust gas, belong to the exhaust-gas treatment field in environmental protection.
Background technology
VOC is called for short VOCs, at ambient pressure, any boiling point is lower than the organic compound of 250 DEG C, or under room temperature (25 DEG C) saturated vapour pressure more than 133.32Pa, be discharged into the general name of all organic compounds in air with the form of gaseous molecular, comprise 8 classes such as alkane, arene, olefines, halohydrocarbon, ester class, aldehydes, ketone and other compound.VOCs is except producing ozone pollution, and form secondary organic aerosol (25 ~ 35%), VOCs has become the decisive precursor of China's city photochemical fog, reduce Particulate Pollution to pollute, remove photochemical fog, improve urban air-quality, the control of VOCs is imperative.Organic waste gas treatment method conventional at present mainly contains combustion method, liquid absorption method, bioanalysis, absorption method, photocatalytic oxidation and low-temperature plasma method.
1, chemical plant waste gas is with the change of producing load, and change in concentration amplitude is comparatively large, and flow also changes, and adopts single method to process, is subject to organic exhaust gas flow and VOC
sthe restriction of concentration, easily causes the problems such as processing cost is high, and treatment effeciency is low.
When 2, adopting the method process organic exhaust gas of biological filter box, if containing acid ingredient in organic exhaust gas, the activity of microorganism in biological filter box can be affected.
When 3, adopting the method process organic exhaust gas of biological filter box, after reaction a period of time, if do not stir to filler in case, easily block, affect gas flowing, occur the uneven phenomenon of reaction, and agitator is set can increases filter box volume, expansion cost.
Summary of the invention
For prior art Problems existing, the invention provides a kind of method processing chemical plant organic exhaust gas, organic exhaust gas is after flowmeter survey flow, enter flow control valve, flow is adjusted between 1000-10000m3/h through flow control valve by organic exhaust gas, then enter concentration monitor, organic exhaust gas monitors out VOC through concentration monitor
safter concentration, enter three-way valve, in three-way valve, VOC in organic exhaust gas
sconcentration is greater than 2000mg/m
3time, then enter dedusting flame-retardant device by the A outlet of three-way valve, in dedusting flame-retardant device, heat exchanger is sent into by air intake blower fan after elimination dust in organic exhaust gas, organic exhaust gas is heated to initiation temperature, then catalyst chamber is entered, organic exhaust gas carries out flameless combustion by catalyst action in catalyst chamber, VOC
sremoved, the high temperature pure air after process returns heat exchanger, after gas temperature declines, enter air by exhaust fan, VOC in organic exhaust gas
sconcentration is less than 2000mg/m
3time, then enter caustic wash tower by the B outlet of three-way valve, organic exhaust gas enters humidifier remove sour gas in caustic wash tower after, enters biological filter case in humidifier after increasing humidity, by including the biological active filling material layer of iron filings, the VOC in waste gas
sbiofacies is transferred to from gas phase, and then decomposed by microbiological oxidation, temperature in biological filter box remains on the optimum activity temperature of microorganism in filter box by thermostat, by spray system, the water smoke of micro-for neutrality alkali is evenly sprayed on the biological active filling material layer including iron filings, to keep the optimum activity humidity of microorganism in filter box, purified gas is discharged by the outlet of biological filter upper box part, after reaction a period of time, 1# electrode, 2# electrode, 3# electrode and 4# electrode are energized respectively, generation can the electromagnetic field of alternating polarities, the biological active filling material layer including iron filings is fully stirred, blocking is avoided to cause reaction uneven, in the biological active filling material layer including iron filings, excessive moisture oozes out the bottom flowing to biological filter box, circulation is flowed into through discharge outlet, be back to spray system after being adjusted to optimum pH to continue to use.
Preference temperature in biological filter box is 15 ~ 40 DEG C; The thickness including the biological active filling material layer of iron filings is 50 ~ 100cm, and the scope of water content (mass fraction) is 40% ~ 60%, and suitable pH value is 7.0 ~ 8.0, and the time of contact of waste gas and packing layer is about 30 ~ 100s.
The reaction temperature of catalyst chamber 300 ~ 500 DEG C, waste gas is about 0.15 ~ 0.25s in the time of staying of catalyst chamber, and in catalyst chamber, catalytic bed selects the ceramic honey comb noble metal catalyst of function admirable.
The invention has the advantages that:
(1) concentration of adjustable organic exhaust gas is to the suitable concentration range of exhaust treatment system;
(2) different waste gas processing methods can be selected according to the concentration of organic exhaust gas;
(3) in the biological treatment section of this method, adopt the acidic materials in alkali wash removal waste gas, avoid the activity affecting microorganism in biological filter box;
(4) in the biological treatment section of this method, filler inside includes iron filings, regularly utilizes the electrode magnetic of change to make it stir, avoids blocking, affects gas flowing, occurs the phenomenon that reaction is uneven, and internal-response space saved by alternative agitator.
Accompanying drawing explanation
Fig. 1 is equipment schematic diagram of the present invention.
In figure: 1-flowmeter, 2-flow control valve, 3-concentration monitor, 4-dedusting flame-retardant device, 5-air intake blower fan, 6-heat exchanger, 7-catalyst chamber, 8-exhaust fan, 9-caustic wash tower, 10-humidifier, 11-include biological active filling material layer, 12-1# electrode, 13-2# electrode, 14-3# electrode, 15-4# electrode, 16-circulation, 17-thermostat, 18-spray system, 19-three-way valve, the biological filter box of 20-of iron filings.
Detailed description of the invention
As shown in Figure 1, organic exhaust gas, after flowmeter 1 measuring flow, enters flow control valve 2, and flow is adjusted to 1000-100000 m through flow control valve 2 by organic exhaust gas
3between/h, then enter concentration monitor 3, organic exhaust gas monitors out VOC through concentration monitor 3
safter concentration, enter three-way valve 19, in three-way valve 19, VOC in organic exhaust gas
sconcentration is greater than 2000mg/m
3time, then enter dedusting flame-retardant device 4 by the A outlet of three-way valve 19, in dedusting flame-retardant device 4, air intake blower fan 5 is entered after elimination dust in organic exhaust gas, organic exhaust gas sends into catalyst chamber 7 by air intake blower fan 5, midway is through heat exchanger 6, and organic exhaust gas is heated to 300 ~ 500 DEG C, organic exhaust gas carries out flameless combustion by the effect of ceramic honey comb noble metal catalyst in catalyst chamber 7, the time of staying is about 0.15 ~ 0.25s, VOC
sremoved, the high temperature pure air after process, through heat exchanger 6, enters air by exhaust fan 8 after gas temperature declines, VOC in organic exhaust gas
sconcentration is less than 2000mg/m
3time, then enter caustic wash tower 9 by the B outlet of three-way valve 19, organic exhaust gas enters humidifier 10 remove sour gas in caustic wash tower 9 after, organic exhaust gas enters biological filter case 20 increase humidity in humidifier 10 after, by the biological active filling material layer 11 including iron filings that thickness is 50 ~ 100cm, the time of contact of waste gas and packing layer is about 30 ~ 100s, the VOC in waste gas
sbiofacies is transferred to from gas phase, and then decomposed by microbiological oxidation, temperature in biological filter box 20 keeps 15 ~ 40 DEG C by thermostat 17, by spray system 18, the water smoke of micro-for neutrality alkali is evenly sprayed on the biological active filling material layer 11 including iron filings, to keep filter box humidity 40% ~ 60%, purified gas is discharged by the outlet on biological filter box 20 top, after reaction a period of time, 1# electrode 12 and 2# electrode 13, 3# electrode 14 and 4# electrode 15 are energized respectively, generation can the electromagnetic field of alternating polarities, the biological active filling material layer 11 including iron filings is fully stirred, blocking is avoided to cause reaction uneven, in the biological active filling material layer 11 including iron filings, excessive moisture oozes out the bottom flowing to biological filter box 20, circulation 16 is flowed into through discharge outlet, be back to spray system 18 after being adjusted to pH value 7.0 ~ 8.0 to continue to use.
Claims (3)
1. one kind processes the method for chemical plant organic exhaust gas, it is characterized in that organic exhaust gas is after flowmeter survey flow, enter flow control valve, flow is adjusted between 1000-10000m3/h through flow control valve by organic exhaust gas, then enter concentration monitor, organic exhaust gas monitors out VOC through concentration monitor
safter concentration, enter three-way valve, in three-way valve, VOC in organic exhaust gas
sconcentration is greater than 2000mg/m
3time, then enter dedusting flame-retardant device by the A outlet of three-way valve, in dedusting flame-retardant device, heat exchanger is sent into by air intake blower fan after elimination dust in organic exhaust gas, organic exhaust gas is heated to initiation temperature, then catalyst chamber is entered, organic exhaust gas carries out flameless combustion by catalyst action in catalyst chamber, VOC
sremoved, the high temperature pure air after process returns heat exchanger, after gas temperature declines, enter air by exhaust fan, VOC in organic exhaust gas
sconcentration is less than 2000mg/m
3time, then enter caustic wash tower by the B outlet of three-way valve, organic exhaust gas enters humidifier remove sour gas in caustic wash tower after, enters biological filter case in humidifier after increasing humidity, by including the biological active filling material layer of iron filings, the VOC in waste gas
sbiofacies is transferred to from gas phase, and then decomposed by microbiological oxidation, temperature in biological filter box remains on the optimum activity temperature of microorganism in filter box by thermostat, by spray system, the water smoke of micro-for neutrality alkali is evenly sprayed on the biological active filling material layer including iron filings, to keep the optimum activity humidity of microorganism in filter box, purified gas is discharged by the outlet of biological filter upper box part, after reaction a period of time, 1# electrode, 2# electrode, 3# electrode and 4# electrode are energized respectively, generation can the electromagnetic field of alternating polarities, the biological active filling material layer including iron filings is fully stirred, blocking is avoided to cause reaction uneven, in the biological active filling material layer including iron filings, excessive moisture oozes out the bottom flowing to biological filter box, circulation is flowed into through discharge outlet, be back to spray system after being adjusted to optimum pH to continue to use.
2. the method for process chemical plant according to claim 1 organic exhaust gas, is characterized in that, the preference temperature in biological filter box is 15 ~ 40 DEG C; The thickness including the biological active filling material layer of iron filings is 50 ~ 100cm, and the scope of water content (mass fraction) is 40% ~ 60%, and suitable pH value is 7.0 ~ 8.0, and the time of contact of waste gas and packing layer is about 30 ~ 100s.
3. the method for process chemical plant according to claim 1 organic exhaust gas, it is characterized in that, the reaction temperature of catalyst chamber 300 ~ 500 DEG C, waste gas is about 0.15 ~ 0.25s in the time of staying of catalyst chamber, and in catalyst chamber, catalytic bed selects ceramic honey comb noble metal catalyst.
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| CN201510124060.9A CN104645798B (en) | 2015-03-22 | 2015-03-22 | A kind of method processing chemical plant organic exhaust gas |
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| CN201510124060.9A CN104645798B (en) | 2015-03-22 | 2015-03-22 | A kind of method processing chemical plant organic exhaust gas |
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| CN104645798B CN104645798B (en) | 2016-06-15 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731778A (en) * | 2017-02-17 | 2017-05-31 | 盐城工学院 | A kind of bio-trickling device and exhaust treatment system |
| CN107261679A (en) * | 2017-07-31 | 2017-10-20 | 苏州他山石环保科技有限公司 | A kind of intelligent waste gas treatment equipment and its method of work |
| CN107297105A (en) * | 2017-07-31 | 2017-10-27 | 苏州他山石环保科技有限公司 | A kind of intelligent waste gas treatment equipment of efficient facilitation and its method of work |
| CN107308763A (en) * | 2017-07-31 | 2017-11-03 | 苏州他山石环保科技有限公司 | A kind of efficient, safety-type exhaust treatment system |
| CN107686206A (en) * | 2017-11-29 | 2018-02-13 | 阳泉市晋扬环保科技有限公司 | A kind of magnetizer |
| CN109621599A (en) * | 2018-12-29 | 2019-04-16 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator and oil smoke catalytic degradation method with oil smoke catalytic degradation function |
| CN111102587A (en) * | 2019-12-13 | 2020-05-05 | 江苏中圣高科技产业有限公司 | Ultra-clean exhaust gas treatment system and treatment method |
| CN111228984A (en) * | 2020-02-13 | 2020-06-05 | 重庆市渝西水务有限公司 | Odor collecting and treating method and device for sewage treatment plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106731778A (en) * | 2017-02-17 | 2017-05-31 | 盐城工学院 | A kind of bio-trickling device and exhaust treatment system |
| CN107261679A (en) * | 2017-07-31 | 2017-10-20 | 苏州他山石环保科技有限公司 | A kind of intelligent waste gas treatment equipment and its method of work |
| CN107297105A (en) * | 2017-07-31 | 2017-10-27 | 苏州他山石环保科技有限公司 | A kind of intelligent waste gas treatment equipment of efficient facilitation and its method of work |
| CN107308763A (en) * | 2017-07-31 | 2017-11-03 | 苏州他山石环保科技有限公司 | A kind of efficient, safety-type exhaust treatment system |
| CN107686206A (en) * | 2017-11-29 | 2018-02-13 | 阳泉市晋扬环保科技有限公司 | A kind of magnetizer |
| CN109621599A (en) * | 2018-12-29 | 2019-04-16 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator and oil smoke catalytic degradation method with oil smoke catalytic degradation function |
| CN109621599B (en) * | 2018-12-29 | 2023-09-22 | 佛山市云米电器科技有限公司 | Range hood with lampblack catalytic degradation function and lampblack catalytic degradation method |
| CN111102587A (en) * | 2019-12-13 | 2020-05-05 | 江苏中圣高科技产业有限公司 | Ultra-clean exhaust gas treatment system and treatment method |
| CN111228984A (en) * | 2020-02-13 | 2020-06-05 | 重庆市渝西水务有限公司 | Odor collecting and treating method and device for sewage treatment plant |
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| Publication number | Publication date |
|---|---|
| CN104645798B (en) | 2016-06-15 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160503 Address after: 325055 Zhejiang, Wenzhou, Longwan District, Haicheng street, Central South Road, No. 81 Applicant after: Tu Ruiqiang Address before: Dayuan town of Fuyang city new village in Hangzhou city of Zhejiang province in 311414. Applicant before: FUYANG HONGXIANG TECHNOLOGY SERVICES CO., LTD. |
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Inventor after: Chen Jianwei Inventor after: Du Haoming Inventor after: Zhang Minyi Inventor before: Li Chengwei |
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Effective date of registration: 20160524 Address after: 510403 306A, room 8, Tong King Street, Baiyun District, Guangdong, Guangzhou Applicant after: Guangzhou Sichuang Environmental Protection Engineering Co., Ltd Address before: 325055 Zhejiang, Wenzhou, Longwan District, Haicheng street, Central South Road, No. 81 Applicant before: Tu Ruiqiang |
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Address after: 510403 306A, room 8, Tong King Street, Baiyun District, Guangdong, Guangzhou Patentee after: Guangdong Sichuang Environment Engineering Co. Ltd. Address before: 510403 306A, room 8, Tong King Street, Baiyun District, Guangdong, Guangzhou Patentee before: Guangzhou Sichuang Environmental Protection Engineering Co., Ltd |