CN104645798B - A kind of method processing chemical plant organic exhaust gas - Google Patents
A kind of method processing chemical plant organic exhaust gas Download PDFInfo
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- CN104645798B CN104645798B CN201510124060.9A CN201510124060A CN104645798B CN 104645798 B CN104645798 B CN 104645798B CN 201510124060 A CN201510124060 A CN 201510124060A CN 104645798 B CN104645798 B CN 104645798B
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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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- Treating Waste Gases (AREA)
Abstract
The present invention discloses a kind of method processing chemical plant organic exhaust gas, and organic exhaust gas is successively through under meter, flow control valve, concentration monitor, dedusting flame-retardant device, air intake blower fan, interchanger, catalyst chamber, exhaust fan, soda-wash tower, humidifier, the biological active filling material layer including iron filings, 1# electrode, 2# electrode, 3# electrode, 4# electrode, circulating water system, thermostatted, sprinkling system, three-way valve, biological filter box etc. The concentration range that the concentration of the adjustable organic exhaust gas of present method is suitable for flare system; Present method can select different waste gas processing methods according to the concentration of organic exhaust gas; In the biological treatment section of present method, adopt alkali wash to remove the acidic substance in waste gas, avoid biological filter box affects microbic activity; In the biological treatment section of present method, filler inside includes iron filings, regularly utilizes the electrode magnetic of change to make it stir, avoids blocking, affects gas flowing, occurs that the phenomenon that reaction is uneven, alternative agitator save inner reaction compartment.
Description
Technical field
The present invention relates to a kind of method processing chemical plant organic exhaust gas, belong to the off gas treatment field in environment protection.
Background technology
Volatile organic compounds is called for short VOCs, it is at ambient pressure, any boiling point is lower than the organic compound of 250 DEG C, or under room temperature (25 DEG C) saturation vapour pressure more than 133.32Pa, with the general name of all organic compound that the form of gaseous molecular is discharged in air, comprise 8 classes such as alkane, arene, alkene class, halogen hydrocarbon class, ester class, aldehyde class, ketone class and other compound. VOCs, except producing ozone pollution, forms secondary organic aerosol (25 ~ 35%), and VOCs has become the decisive precursor of China's city photo-chemical smog, reduce particulate matter to pollute, remove photo-chemical smog, it is to increase urban air-quality, the control of VOCs is imperative. Organic waste gas treatment method conventional at present mainly contains burning method, liquid absorption method, biological process, absorption method, photocatalytic oxidation and low-temperature plasma method.
1, chemical plant waste gas is with the change producing load, and change in concentration amplitude is relatively big, and flow also changes, and adopts single method to process, is subject to organic exhaust gas flow and VOCSThe restriction of concentration, easily causes processing cost height, the problems such as processing efficiency is low.
When 2, adopting the method process organic exhaust gas of biological filter box, if containing acidic component in organic exhaust gas, microbic activity in biological filter box can be affected.
When 3, adopting the method process organic exhaust gas of biological filter box, after reaction for some time, if filler in case not being stirred, easily blocking, affecting gas flowing, the phenomenon that reaction is uneven occurs, and agitator is set and can increase filter box volume, expand cost.
Summary of the invention
For prior art Problems existing, the present 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 entering concentration monitor, organic exhaust gas monitors out VOC through concentration monitorSAfter concentration, enter three-way valve, in three-way valve, VOC in organic exhaust gasSConcentration is greater than 2000mg/m3Time, then enter dedusting flame-retardant device by the A outlet of three-way valve, organic exhaust gas sends into interchanger by air intake blower fan after elimination dust in dedusting flame-retardant device, organic exhaust gas is heated to combustion initiation temperature, then catalyst chamber is entered, organic exhaust gas carries out flameless combustion by catalyst action in catalyst chamber, VOCSBeing removed, the high temperature uncontaminated air after process returns interchanger, enters air by exhaust fan after gas temperature declines;VOC in organic exhaust gasSConcentration is less than 2000mg/m3Time, then entering soda-wash tower by the B outlet of three-way valve, organic exhaust gas enters humidifier after removing sour gas in soda-wash tower, enters biological filter case in humidifier after increasing humidity, by including the biological active filling material layer of iron filings, the VOC in waste gasSBiophase 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 thermostatted, by sprinkling 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 for some time, 1# electrode, 2# electrode, 3# electrode and 4# electrode are energized respectively, generation can the electromagnetic field of checker polarity, the biological active filling material layer including iron filings is fully stirred, blocking is avoided to cause reaction uneven, include excessive moisture in the biological active filling material layer of iron filings and ooze out the bottom flowing to biological filter box, circulating water system is flowed into through water port, it is back to sprinkling system after being adjusted to optimum pH to continue to use.
Optimal 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 (massfraction) is 40% ~ 60%, and suitable pH value is 7.0 ~ 8.0, and the duration of contact of waste gas and packing layer is about 30 ~ 100s.
The temperature of reaction of catalyst chamber 300 ~ 500 DEG C, waste gas is about 0.15 ~ 0.25s in the residence time of catalyst chamber, and in catalyst chamber, catalytic bed selects the ceramic honey comb noble metal catalyst of excellent property.
It is an advantage of the current invention that:
(1) concentration range that the concentration of adjustable organic exhaust gas is suitable for flare 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 present method, adopt alkali wash to remove the acidic substance in waste gas, avoid biological filter box affects microbic activity;
(4) in the biological treatment section of present method, filler inside includes iron filings, regularly utilizes the electrode magnetic of change to make it stir, avoids blocking, affects gas flowing, occurs that the phenomenon that reaction is uneven, alternative agitator save inner reaction compartment.
Accompanying drawing explanation
Fig. 1 is the equipment schematic diagram of the present invention.
In figure: 1-under meter, 2-flow control valve, 3-concentration monitor, 4-dedusting flame-retardant device, 5-air intake blower fan, 6-interchanger, 7-catalyst chamber, 8-exhaust fan, 9-soda-wash tower, 10-humidifier, 11-include the biological active filling material layer of iron filings, 12-1# electrode, 13-2# electrode, 14-3# electrode, 15-4# electrode, 16-circulating water system, 17-thermostatted, 18-sprinkling system, 19-three-way valve, the biological filter box of 20-.
Embodiment
As shown in Figure 1, organic exhaust gas, after under meter 1 measuring flow, enters flow control valve 2, and flow is adjusted to 1000-100000m through flow control valve 2 by organic exhaust gas3Between/h, then entering concentration monitor 3, organic exhaust gas monitors out VOC through concentration monitor 3SAfter concentration, enter three-way valve 19, in three-way valve 19, VOC in organic exhaust gasSConcentration is greater than 2000mg/m3Time, then enter dedusting flame-retardant device 4 by the A outlet of three-way valve 19, organic exhaust gas enters after elimination dust air intake blower fan 5 in dedusting flame-retardant device 4, organic exhaust gas sends into catalyst chamber 7 by air intake blower fan 5, organic exhaust gas, through interchanger 6, is heated to 300 ~ 500 DEG C by midway, and organic exhaust gas carries out flameless combustion by ceramic honey comb noble metal catalyst effect in catalyst chamber 7, the residence time is about 0.15 ~ 0.25s, VOCSBeing removed, the high temperature uncontaminated air after process, through interchanger 6, enters air by exhaust fan 8 after gas temperature declines;VOC in organic exhaust gasSConcentration is less than 2000mg/m3Time, then enter soda-wash tower 9 by the B outlet of three-way valve 19, organic exhaust gas enters humidifier 10 after removing sour gas in soda-wash tower 9, organic exhaust gas enters biological filter case 20 after increasing humidity in humidifier 10, by the biological active filling material layer 11 including iron filings that thickness is 50 ~ 100cm, the duration of contact of waste gas and packing layer is about 30 ~ 100s, the VOC in waste gasSBiophase is transferred to from gas phase, and then decomposed by microbiological oxidation, temperature in biological filter box 20 keeps 15 ~ 40 DEG C by thermostatted 17, by sprinkling 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 for some time, 1# electrode 12 and 2# electrode 13, 3# electrode 14 and 4# electrode 15 are energized respectively, generation can the electromagnetic field of checker polarity, the biological active filling material layer 11 including iron filings is fully stirred, blocking is avoided to cause reaction uneven, include excessive moisture in the biological active filling material layer 11 of iron filings and ooze out the bottom flowing to biological filter box 20, circulating water system 16 is flowed into through water port, it is back to sprinkling 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 characterised in that organic exhaust gas, after flowmeter survey flow, enters flow control valve, and flow is adjusted to 1000-10000m through flow control valve by organic exhaust gas3Between/h, then entering concentration monitor, organic exhaust gas is monitored out after VOCs concentration through concentration monitor, enters three-way valve, and in three-way valve, in organic exhaust gas, VOCs concentration is greater than 2000mg/m3Time, then enter dedusting flame-retardant device by the A outlet of three-way valve, organic exhaust gas sends into interchanger by air intake blower fan after elimination dust in dedusting flame-retardant device, organic exhaust gas is heated to combustion initiation temperature, then entering catalyst chamber, organic exhaust gas carries out flameless combustion by catalyst action in catalyst chamber, and VOCs is removed, high temperature uncontaminated air after process returns interchanger, enters air by exhaust fan after gas temperature declines; In organic exhaust gas, VOCs concentration is less than 2000mg/m3Time, then enter soda-wash tower by the B outlet of three-way valve, organic exhaust gas enters humidifier after removing sour gas in soda-wash tower, biological filter case is entered after humidifier increases humidity, by including the biological active filling material layer of iron filings, VOCs in waste gas transfers to biophase 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 thermostatted, by sprinkling 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 for some time, 1# electrode, 2# electrode, 3# electrode and 4# electrode are energized respectively, generation can the electromagnetic field of checker polarity, the biological active filling material layer including iron filings is fully stirred, blocking is avoided to cause reaction uneven, include excessive moisture in the biological active filling material layer of iron filings and ooze out the bottom flowing to biological filter box, circulating water system is flowed into through water port, it is back to sprinkling 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, it is characterised in that, the optimal 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 massfraction scope of water content is 40% ~ 60%, and suitable pH value is 7.0 ~ 8.0, and the duration of contact of waste gas and packing layer is 30 ~ 100s.
3. the method for process chemical plant according to claim 1 organic exhaust gas, it is characterised in that, the temperature of reaction of catalyst chamber 300 ~ 500 DEG C, waste gas is 0.15 ~ 0.25s in the residence time of catalyst chamber, and in catalyst chamber, catalytic bed selects ceramic honey comb noble metal catalyst.
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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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN111228984B (en) * | 2020-02-13 | 2022-03-29 | 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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| KR20070004479A (en) * | 2006-12-07 | 2007-01-09 | 임광희 | The process of recirculated hybrid system composed of novel photo-catalytic reactor and biofilter to treat process-waste-air containing vocs and malodor safely and efficiently |
| US8889079B2 (en) * | 2010-01-13 | 2014-11-18 | Efb, Inc. | Apparatus for removal of particles and VOC from an airstream |
| CN102423611B (en) * | 2011-10-20 | 2013-09-25 | 广州狮岭皮革皮具产业研究中心有限公司 | Method for removing VOCs by UV light catalytic oxidation cooperating with biofiltration |
| CN103920377A (en) * | 2014-04-16 | 2014-07-16 | 浙江万里学院 | Electric-biological drip filter purification device for VOC (volatile organic compounds) waste gas |
| CN104083988B (en) * | 2014-07-02 | 2016-04-27 | 蔡祥雨 | VOCs waste gas treatment method |
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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 |