CN101549255A - Method for treating organic exhaust-gas generated in waste plastic granulation process - Google Patents
Method for treating organic exhaust-gas generated in waste plastic granulation process Download PDFInfo
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- CN101549255A CN101549255A CNA200910098175XA CN200910098175A CN101549255A CN 101549255 A CN101549255 A CN 101549255A CN A200910098175X A CNA200910098175X A CN A200910098175XA CN 200910098175 A CN200910098175 A CN 200910098175A CN 101549255 A CN101549255 A CN 101549255A
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- organic exhaust
- exhaust gas
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- plastic granulation
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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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Abstract
The invention discloses a method for treating organic exhaust-gas generated in waste plastic granulation process, which comprises: the organic exhaust-gas generated in waste plastic granulation process is passed into the bottom of a biological filter tank with biological filling material disposed therein; cycling liquid sprays from the top of the filter tank, flows into a storage tank by bottom, and is lifted to the top by a water pump for cycling; the organic exhaust-gas is wetted by the cycling liquid, then contacts the biological filling material for degrading the organic pollutants in the exhaust-gas by the microorganisms fixed on the biological filling material surface; and the purified exhaust-gas is discharged from top. The invention treats organic exhaust-gas generated in waste plastic granulation process by biological method, does not need humidifier or dedusting facility, and has a simple structure.
Description
Technical field
The present invention relates to waste gas processing method, relate in particular to the processing method of the organic exhaust gas that produces in a kind of waste plastic granulation process.
Background technology
Environmental problem is the hot issue that the current China and even the world all pay close attention to.China is one of the most serious country of atmosphere pollution in the world.Atmosphere pollution has particle and gaseous state thing two classes, wherein gaseous contaminant accounts for major part, enter in the pollutant of atmosphere in the annual whole world, gaseous contaminant accounts for 75%, and gaseous contaminant is divided into inorganic pollution and organic pollution two big classes, accounts for the overwhelming majority with regard to the kind organic pollution.In 25 kinds of gases in the listed toxic gas emission inventory (TRI) of American National Environmental Protection Department (EPA), there are 18 kinds to be organic matter, occupy 74.2% of poisonous gas discharge capacity.In 189 kinds of harm air pollutants of the strict restriction of the Clean Air Act Amendment that the U.S. passes through nineteen ninety, have 70% to be volatile organic matter.
In the pollutant of 68 kinds of preferential controls that China environmental monitoring master station proposes, organic compound has 58 kinds.As seen administer organic exhaust gas and be one of atmospheric environment protection very pith.The organic exhaust gas fecund is born in industrial processes such as oil, chemical industry, printing and dyeing, bonding, coating, mainly comprise benzene, toluene, polycyclic aromatic hydrocarbon, organic sulfur compound and other odorant, the main feature of these organic exhaust gas is that concentration is low, air quantity is easy to volatilization greatly and all, not only do not had recovery value but also serious environment pollution.China has only taked purified treatment to the industrial organic exhaust gas of high concentration at present, and method commonly used such as Production by Catalytic Combustion Process, absorption process, absorption method etc. are for the organic exhaust gas (pollutant levels＜5g/m of low concentration
3), this several method complex process, therefore the operating cost height does not still have cost-effective measure at present.The biological waste gas purification technology is compared with traditional high-concentration organic waste gas purification method, and not only equipment is simple, and expense is cheap, and can improve the clearance of organic exhaust gas greatly, is the preface hot spot technology of administering the low-concentration organic exhaust gas field at present both at home and abroad.
Waste or used plastics processing is as new industry, and its industry size is constantly developed, and kind and output are on the increase.The domestic enterprise that is engaged in waste plastic recovery and processing adopts more and more, but still based on individual enterprise.At present, the various places that spread all over the country, waste plastics transaction place have formed a collection of larger waste plastics recovery transaction distribution centre and processing accumulation regions.
Because the waste water, the waste gas that emit in the waste plastic granulation enterprise production process have considerable influence to surrounding enviroment, do not pollute, had a strong impact on peripheral resident's life and self there is strength to be unwilling to inject capital into to administer yet.It is a kind ofly to turn waste into wealth the way that resource is utilized again that nondegradable plastic products are reclaimed the washing granulation.But because manufacturing enterprise is not equipped with the pollution treatment facility, produces waste gas in the washing granulation process and can't obtain administering, cause the pollution of surrounding air.Waste plastic granulation waste gas is made up of organic gas that produces in the waste material oil refining process and dust, is mainly organic exhaust gas, as " three cause " class material and foul gas such as benzene, toluene, styrene.
For the purified treatment of organic gas, no matter be the traditional treatment method that extensively adopts, still treatment technology newly developed owing to many-sided factors such as its scope of application, removal performance, investment operating costs, has all restricted the cell processing The Application of Technology.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the processing method of the organic exhaust gas that produces in a kind of waste plastic granulation process is provided.
The processing method of the organic exhaust gas that produces in the waste plastic granulation process is: the organic exhaust gas that produces in the waste plastic granulation process enters the bottom, biofilter, biofilter built-in biological filler, circulation fluid descends from the filter tank top spray,, circulate to the top, biofilter to storage tank from the pond underflow by water pump lifting; The ratio of circulation fluid and organic exhaust gas volume flow is 1: 40～1: 20, organic exhaust gas is recycled liquid wetting, contact with biologic packing material by packing layer, utilize the organic pollution in the fixing microbial degradation waste gas in biologic packing material surface, the void tower time of staying 17.5-57.5 second of organic exhaust gas; Regularly add nutrients in circulation fluid, filter tank humidity is 50～70%, and temperature is 25～35 ℃, and the pH value is 7～8, and the waste gas after the purification is from top discharge.
Described organic exhaust gas composition is benzene series thing, amine, alcohol, ether, ester, acid and petroleum hydrocarbon compound, the concentration 140～460mg/Nm of organic exhaust gas
3Fixing microorganism is by cultivating Sewage Plant, petrochemical plant or coke-oven plant's activated sludge, filter out efficient microbial strain, directly being inoculated on the filler of biofilter.Nutrients is nitrogenous and the phosphorus inorganic substances; Nitrogen and phosphorus total content are 0.5～1.5mg/L, and the mass ratio of nitrogen and phosphorus is 3: 1～5: 1.Biologic packing material is a high resiliency cellular polyurethane filler.Packing layer is series operation.
The beneficial effect that the present invention compared with prior art has:
1) the present invention adopts the general absorption method operating cost of organic exhaust gas that produces in the biofilter processing waste plastic granulation process low;
2) the present invention can bring into play the effect that increases humidity, regulates pH, dedusting and interpolation nutrition by the circulation of circulation fluid;
3) the present invention adopts the cellular polyurethane filler as biologic packing material, good hydrophilic property, and the fixation of microbe ability is strong.
Description of drawings
Accompanying drawing is the processing method schematic diagram that produces organic exhaust gas in the waste plastic granulation process.
The specific embodiment
Producing the filler that adopts in the biofilter of organic exhaust gas in the old plastic granulation process is high resiliency cellular polyurethane filler, its component is: PEPA or PPG 100 weight portions, polymer polyatomic alcohol 60 weight portions, isocyanates 00 weight portion, water 10 weight portions, catalyst 01.0 weight portion, blowing agent 40 weight portions, foam stabiliser 6 weight portions.Catalyst is stannous octoate and dimethyl benzylamine.Blowing agent is water and fluoro trichloromethane.Foam stabiliser is silicone based foam stabiliser.Below illustrate performance of the present invention.
Embodiment 1:
Organic exhaust gas (TVOC) concentration is 140mg/Nm
3Waste plastic granulation process in produce organic exhaust gas and enter the bottom, biofilter, biofilter built-in biological filler, circulation fluid descends from the filter tank top spray, then from the pond underflow to storage tank, circulates to the top, biofilter by water pump lifting again; The ratio of circulation fluid and organic exhaust gas volume flow is 1: 20, and organic exhaust gas is recycled liquid wetting, contacts with biologic packing material then, by the organic pollution in the surperficial microbial degradation waste gas of fixing of biologic packing material.The bed stuffing height of biofilter is 0.5m, and totally 2 layers, the void tower time of staying of waste gas is 17.5 seconds, and biofilter humidity is 50%, and temperature is 35 ℃, and the pH value is 7.Wherein adding nutrients is ammonium chloride and potassium dihydrogen phosphate, and adding dose is 0.5mg/L, and the mass ratio of nitrogen and phosphorus is 3: 1.Packing layer is series operation.Wherein the organic exhaust gas composition is benzene series thing, pure and mild ester, and fixing microorganism is by cultivating Sewage Plant, petrochemical plant or coke-oven plant's activated sludge, filter out efficient microbial strain, directly being inoculated on the filler of biofilter.Waste gas after the purification is from top discharge.
Embodiment 2:
Organic exhaust gas (TVOC) concentration is 460mg/Nm
3Waste plastic granulation process in produce organic exhaust gas and enter the bottom, biofilter, biofilter built-in biological filler, circulation fluid descends from the filter tank top spray, then from the pond underflow to storage tank, circulates to the top, biofilter by water pump lifting again; The ratio of circulation fluid and organic exhaust gas volume flow is 1: 40, and organic exhaust gas is recycled liquid wetting, contacts with biologic packing material then, by the organic pollution in the surperficial microbial degradation waste gas of fixing of biologic packing material.The bed stuffing height of biofilter is 1m, and totally 3 layers, the void tower time of staying of waste gas is 57.5 seconds, and biofilter humidity is 70%, and temperature is 30 ℃, and the pH value is 7.Wherein adding nutrients is ammonium chloride and potassium dihydrogen phosphate, and adding dose is 1.5mg/L, and the mass ratio of nitrogen and phosphorus is 4: 1.Packing layer is series operation.Wherein the organic exhaust gas composition is benzene series thing, pure and mild petroleum hydrocarbon compound, and fixing microorganism is by cultivating Sewage Plant, petrochemical plant or coke-oven plant's activated sludge, filter out efficient microbial strain, directly being inoculated on the filler of biofilter.Waste gas after the purification is from top discharge.
Embodiment 3:
Organic exhaust gas (TVOC) concentration is 240mg/Nm
3Waste plastic granulation process in produce organic exhaust gas and enter the bottom, biofilter, biofilter built-in biological filler, circulation fluid descends from the filter tank top spray, then from the pond underflow to storage tank, circulates to the top, biofilter by water pump lifting again; The ratio of circulation fluid and organic exhaust gas volume flow is 1: 30, and organic exhaust gas is recycled liquid wetting, contacts with biologic packing material then, by the organic pollution in the surperficial microbial degradation waste gas of fixing of biologic packing material.The bed stuffing height of biofilter is 1m, and totally 2 layers, the void tower time of staying of waste gas is 40 seconds, and biofilter humidity is 60%, and temperature is 25 ℃, and the pH value is 8.Wherein adding nutrients is ammonium chloride and potassium dihydrogen phosphate, and adding dose is 1.0mg/L, and the mass ratio of nitrogen and phosphorus is 3: 1.Packing layer is series operation.Wherein the organic exhaust gas composition is benzene series thing, pure and mild ester, and fixing microorganism is by cultivating Sewage Plant, petrochemical plant or coke-oven plant's activated sludge, filter out efficient microbial strain, directly being inoculated on the filler of biofilter.Waste gas after the purification is from top discharge.
Embodiment 4:
Organic exhaust gas (TVOC) concentration is 340mg/Nm
3Waste plastic granulation process in produce organic exhaust gas and enter the bottom, biofilter, biofilter built-in biological filler, circulation fluid descends from the filter tank top spray, then from the pond underflow to storage tank, circulates to the top, biofilter by water pump lifting again; The ratio of circulation fluid and organic exhaust gas volume flow is 1: 34, and organic exhaust gas is recycled liquid wetting, contacts with biologic packing material then, by the organic pollution in the surperficial microbial degradation waste gas of fixing of biologic packing material.The bed stuffing height of biofilter is 1m, and totally 2 layers, the void tower time of staying of waste gas is 42.5 seconds, and biofilter humidity is 70%, and temperature is 28 ℃, and the pH value is 8.Wherein adding nutrients is ammonium chloride and potassium dihydrogen phosphate, and adding dose is 1.2mg/L, and the mass ratio of nitrogen and phosphorus is 3: 1.Packing layer is series operation.Wherein the organic exhaust gas composition is benzene series thing, pure and mild ester, and fixing microorganism is by cultivating Sewage Plant, petrochemical plant or coke-oven plant's activated sludge, filter out efficient microbial strain, directly being inoculated on the filler of biofilter.Waste gas after the purification is from top discharge.
Claims (6)
1. the processing method of the organic exhaust gas that produces in the waste plastic granulation process, it is characterized in that: the organic exhaust gas that produces in the waste plastic granulation process enters the bottom, biofilter, biofilter built-in biological filler, circulation fluid descends from the filter tank top spray,, circulate to the top, biofilter to storage tank from the pond underflow by water pump lifting; The ratio of circulation fluid and organic exhaust gas volume flow is 1: 40～1: 20, organic exhaust gas is recycled liquid wetting, contact with biologic packing material by packing layer, utilize the organic pollution in the fixing microbial degradation waste gas in biologic packing material surface, 17.5～57.5 seconds void tower time of staying of organic exhaust gas; Regularly add nutrients in circulation fluid, filter tank humidity is 50～70%, and temperature is 25～35 ℃, and the pH value is 7～8, and the waste gas after the purification is from top discharge.
2. the processing method of the organic exhaust gas that produces in a kind of waste plastic granulation process according to claim 1, it is characterized in that, described organic exhaust gas composition is benzene series thing, amine, alcohol, ether, ester, acid and petroleum hydrocarbon compound, the concentration 140～460mg/Nm of organic exhaust gas
3
3. the processing method of the organic exhaust gas that produces in a kind of waste plastic granulation process according to claim 1, it is characterized in that, described fixing microorganism is by cultivating Sewage Plant, petrochemical plant or coke-oven plant's activated sludge, filter out efficient microbial strain, directly be inoculated on the filler of biofilter.
4. the processing method of the organic exhaust gas that produces in a kind of waste plastic granulation process according to claim 1 is characterized in that, described nutrients is nitrogenous and the phosphorus inorganic substances; Nitrogen and phosphorus total content are 0.5～1.5mg/L, and the mass ratio of nitrogen and phosphorus is 3: 1～5: 1.
5. the processing method of the organic exhaust gas that produces in a kind of waste plastic granulation process according to claim 1 is characterized in that, described biologic packing material is a high resiliency cellular polyurethane filler.
6. the processing method of the organic exhaust gas that produces in a kind of waste plastic granulation process according to claim 1 is characterized in that, described packing layer is series operation.
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| CNA200910098175XA CN101549255A (en) | 2009-05-05 | 2009-05-05 | Method for treating organic exhaust-gas generated in waste plastic granulation process |
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| CNA200910098175XA CN101549255A (en) | 2009-05-05 | 2009-05-05 | Method for treating organic exhaust-gas generated in waste plastic granulation process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906944A (en) * | 2015-06-25 | 2015-09-16 | 安庆市虹泰新材料有限责任公司 | Device for treating waste gases volatilizing during polyamide granulation |
| CN106123981A (en) * | 2016-06-20 | 2016-11-16 | 苏州崇恩模塑有限公司 | In a kind of reaction tower, waste water flows through filler speed monitoring monitoring system |
| CN106345286A (en) * | 2016-11-10 | 2017-01-25 | 江苏科威环保技术有限公司 | Purifying device for oily flue gas |
| CN108744950A (en) * | 2018-07-12 | 2018-11-06 | 江苏俊镕环保设备有限公司 | A kind of dust-laden organic waste gas treatment device based on biochemical sensitization packed bed |
| CN110898651A (en) * | 2019-12-05 | 2020-03-24 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Air filtering device of 3D printer |
| CN115178084A (en) * | 2022-07-12 | 2022-10-14 | 明硕环境科技集团股份有限公司 | Synchronous denitrification and desulfurization system and method |
-
2009
- 2009-05-05 CN CNA200910098175XA patent/CN101549255A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906944A (en) * | 2015-06-25 | 2015-09-16 | 安庆市虹泰新材料有限责任公司 | Device for treating waste gases volatilizing during polyamide granulation |
| CN106123981A (en) * | 2016-06-20 | 2016-11-16 | 苏州崇恩模塑有限公司 | In a kind of reaction tower, waste water flows through filler speed monitoring monitoring system |
| CN106123981B (en) * | 2016-06-20 | 2019-04-02 | 苏州崇恩模塑有限公司 | Waste water flows through filler speed monitoring monitoring system in a kind of reaction tower |
| CN106345286A (en) * | 2016-11-10 | 2017-01-25 | 江苏科威环保技术有限公司 | Purifying device for oily flue gas |
| CN108744950A (en) * | 2018-07-12 | 2018-11-06 | 江苏俊镕环保设备有限公司 | A kind of dust-laden organic waste gas treatment device based on biochemical sensitization packed bed |
| CN110898651A (en) * | 2019-12-05 | 2020-03-24 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Air filtering device of 3D printer |
| CN115178084A (en) * | 2022-07-12 | 2022-10-14 | 明硕环境科技集团股份有限公司 | Synchronous denitrification and desulfurization system and method |
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Open date: 20091007 |