CN103623692A - Blanket type waste gas biofiltration device and method for treating waste gas by adopting device - Google Patents
Blanket type waste gas biofiltration device and method for treating waste gas by adopting device Download PDFInfo
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- CN103623692A CN103623692A CN201310633014.2A CN201310633014A CN103623692A CN 103623692 A CN103623692 A CN 103623692A CN 201310633014 A CN201310633014 A CN 201310633014A CN 103623692 A CN103623692 A CN 103623692A
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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
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- 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 blanket type waste gas biofiltration device and a method for treating waste gases by adopting the device. The blanket type waste gas biofiltration device comprises a nutrient solution sprinkling chamber, a packing chamber, a nutrient solution recovery chamber, an air inlet, an air outlet, an induced draft fan, a pressure pump, a nutrient solution inlet, a nutrient solution outlet and a nutrient solution collection tank; the nutrient solution sprinkling chamber is arranged at the upper end of the blanket type waste gas biofiltration device; the nutrient solution recovery chamber is arranged at the lower end of the blanket type waste gas biofiltration device; the packing chamber is positioned between the nutrient solution sprinkling chamber and the nutrient solution recovery chamber; a plurality of blanket type porous packing materials are vertically hung in the packing chamber; activated sludge or microorganisms for waste gas treatment is or are inoculated on the surfaces of the packing materials; the thickness of the blanket type porous packing materials is 1-100 mm; the horizontal distance between every two adjacent blanket type porous packing materials is 1-10 mm. The blanket type waste gas biofiltration device and the method have the advantages of simple operation and low energy consumption, solve the problem of the traditional biofiltration technology that the packing materials are blocked, and when the air speed is 0.07 m/s, the pressure drop of packing materials per unit height is always stabilized within 400 Pa/m.
Description
(1) technical field
The present invention relates to a kind of method of emission-control equipment and processing waste gas, be particularly related to a kind of method of blanket formula waste gas biofiltration device and processing waste gas thereof, the multiple pollutants such as hydrogen sulfide, ammonia and volatile organic matter be can remove, industrial waste gas, rubbish and sewage foul smell are applicable to process.
(2) background technology
Biological treatment technology for waste gas is because having the advantages such as the incomparable expense of conventional method (as absorption and sorption, burning etc.) is cheap, environmentally friendly, become gradually a new and high technology of promoting rapidly in waste gas purification field, especially at low concentration, administer compared with the organic exhaust gas of atm number and foul gas.Compare with more external developed countries, although China has had certain Research foundation, its practical application is still in the junior stage.
At present, the research of gaseous contaminant biologic treating technique and application type mainly contain three classes, i.e. biological kitchen sink, biological filter and bio-trickling filter.These technology have feature separately, as good in biological kitchen sink absorbability, but unit volume biomass is little, it is low to process load, less application at present; Biological filter (being applied at present pumping plant room foul smell, municipal sewage odor purification) does not need spraying nutrient solution, and equipment is simple, and treating capacity is large, management maintenance is convenient, but artificial control is poor, the pressure loss is large, life cycle is short; Bio-trickling filter (being generally applied at present industrial waste gas purifying) can be circulated and be regulated in time nutrient by nutrient solution, and controllability is strong, processes load high, is especially suitable for the volatile organic matter compared with difficult degradation, but has the problems such as packed bed and circulatory system obstruction.
Generally speaking, bio-filter technology packing layer Pressure Drop is main, and air speed in filter tank is relevant again with waste gas, and air speed is higher, and Pressure Drop is larger, and the air-introduced machine power of required like this air-supply is higher, and energy loss is also just larger.Simultaneously, along with the operation of biofilter, microbial adhesion forms biomembrane on filler, carries out metabolism when pollutant and rise in value in microorganism waste gas decomposition.Now, biomembrane can be more and more thicker, causes air duct more and more narrow, and air velocity is along with rising, and the pressure loss is corresponding increasing also.Growth of microorganism is understood aging death after certain hour, and dead biomembrane can come off from filler.Because the filler of traditional biological filtering technique is loose piling up in biofilter substantially, and space is smaller, causes like this biomembrane coming off to be accumulated in filler gap, thereby stops up filler, causes gas passage further to diminish, and the aggravation pressure loss increases.If come off, biomembrane is not processed, and can cannot meet the needs of design and actual treatment because packing layer Pressure Drop causes too greatly the gas flow of design like this.
How to overcome the defects such as traditional biological filtering technique bed obstruction, explore the biologic treating technique of new generation of the advantage that has more, become and propose starting point of the present invention.
In the running of biological filter, filler stops up and not only to cause the filtering ponds pressure loss to increase, and the exhausted air quantity of actual treatment reduces, thereby affects Practical Project operational effect.The biomembrane that needs periodic cleaning filler in practical operation or come off mechanically on filler, causes engineering operating difficulties.In order to solve filler, stop up the series of problems causing, the present invention has developed a kind of novel blanket formula biologic packing material that can solve filler blockage problem, air-flow not only can longitudinal diffusion mass transfer but also can horizontal proliferation mass transfer, the biomembrane that simultaneously comes off can be fallen into from the gap between blanket formula filler filtering ponds bottoms, thereby avoids biomembrane to be deposited on filler and stop up filler.
(3) summary of the invention
The object of the invention is to provide a kind of blanket formula waste gas biofiltration device and processes the method for waste gas, has solved filler in traditional waste gas bio-filter technology and has stopped up problems such as causing the pressure loss is large, fluctuation of service.
The technical solution used in the present invention is:
The invention provides a kind of blanket formula waste gas biofiltration device, described filter comprises that nutrient solution spray chamber, filler chamber, nutrient solution reclaim chamber, air inlet, exhaust outlet, air-introduced machine, compression pump, nutrient solution entrance, nutrient solution outlet and nutrient solution collecting pit, the upper end of described blanket formula waste gas biofiltration device is nutrient solution spray chamber, the lower end of blanket formula waste gas biofiltration device is that nutrient solution reclaims chamber, and described filler chamber reclaims between chamber at nutrient solution spray chamber and nutrient solution; Described nutrient solution spray chamber top is provided with exhaust outlet, and side is provided with nutrient solution entrance, and inside is provided with spray system; Described nutrient solution reclaims side, chamber and is provided with air inlet and nutrient solution outlet, described air inlet is communicated with air-introduced machine by pipeline, described nutrient solution outlet is communicated with nutrient solution collecting pit, described nutrient solution collecting pit is communicated with nutrient solution import by compression pump, described nutrient solution import communicates with spray system, some blocks of blanket formula porous aggregates of described filler chamber vertical hanging, described filling surface inoculation of activated-sludge or exhaust-gas treatment are used microorganism, described blanket formula porous aggregate thickness is 1～100mm, and described adjacent blanket formula porous aggregate level interval is 1～10mm.
Further, the aperture of described blanket formula porous aggregate is 2～10mm.
Further, described adjacent blanket formula porous aggregate level interval is 2～5mm.
Further, described blanket formula porous aggregate thickness is 10～20mm.
Further, described blanket formula porous aggregate is that aperture is net (the preferably netted blanket formula porous aggregate of nylon or polyurethane braiding) prepared by 2～10mm high-molecular organic material, and filler proportion is 0.65～1.28g/cm
3.
Further, described filler chamber ratio of height to diameter is (1～4): 1.
Further, the middle part that described filler chamber and nutrient solution spray chamber and nutrient solution reclaim contact position, chamber and filler chamber arranges respectively crossbeam, the top of described blanket formula filler is fixed on the crossbeam of filler chamber and nutrient solution spray chamber contact position, the bottom of described blanket formula filler is fixed on filler chamber and nutrient solution reclaims on the crossbeam of contact position, chamber, and the centre of described blanket formula filler is fixed on the crossbeam of filler chamber middle part.
Further, described air inlet is positioned at nutrient solution and reclaims top, chamber, apart from nutrient solution, reclaims bottom, chamber 0.2～2m, and described nutrient solution outlet is reclaimed bottom, chamber 0～0.5m apart from nutrient solution, and described nutrient solution entrance is apart from nutrient solution spray chamber top 0.3～1.5m.
The present invention also provides a kind of method of utilizing described blanket formula waste gas biofiltration device to process waste gas, and described method is: open air-introduced machine, (preferably, containing the waste gas of dimethylbenzene, xylene concentration is 1500～2000mg/m to waste gas
3) by air-introduced machine, enter blanket formula waste gas biofiltration device, filler chamber being discharged by exhaust outlet flows through, opening pressure pump is sprayed onto filled chamber by the nutrient solution in nutrient solution collecting pit by nutrient solution spray system simultaneously, nutrient solution is indoor through the nutrient solution recovery of filler chamber's inflow exhaust gas biofiltration device lower end, then by nutrient solution, is exported and is entered nutrient solution collecting pit; The ratio of described nutrient solution spray flow and exhaust gas flow is (1～30): 10000, and the inorganic compound that described nutrient solution contains N, P and the mixing liquid that contains C, H, O organic compound.Preferably, nutrient solution of the present invention adopts starch, ammonium chloride, potassium hydrogen phosphate configuration to form, and starch concentration is that 800mg/L, total phosphorus are that 6.8mg/L, ammonia nitrogen concentration are 90mg/L, pH5.6～6.0.
Further, the ratio of described nutrient solution spray flow and exhaust gas flow is (5～10): 10000.
Waste gas of the present invention can enter by top and discharge from filter bottom, also can enter by symmetrical opposite side upper end and discharge from filter lower end one side, in described waste gas, pollutant decomposes by being attached to the microorganism hanging on blanket formula porous aggregate, from filter top spraying nutrient solution, supply with bacteria metabolism and use simultaneously.The described spraying nutrient solution filler chamber that flows through together enters nutrient solution together with the microorganism mud coming off on filler and reclaims chamber, by nutrient solution outlet, enter nutrient solution collecting pit again, microorganism mud in nutrient solution collecting pit needs periodic cleaning, and nutrient solution needs regular update.
The microorganism adhering on described filler, comes from the activated sludge that biological filter initial operating stage is inoculated, and this activated sludge derives from the microorganism mud of municipal sewage plant or industrial wastewater biostation or the microorganism of pure culture.
Compared with prior art, beneficial effect of the present invention is mainly reflected in: because the filler in traditional biological filter tank is loose piling up in filter tank, aging biomembrane is understood the filler below filler space falls to after filler comes off, and be deposited in filler top and roll up gradually larger mud group, finally cause filler interstitial channels to narrow down arranging completely stopping up.The blanket formula porous aggregate level interval that blanket formula biofiltration device internal vertical of the present invention hangs is larger, the biomembrane coming off directly falls to biofiltration device bottom and is discharged by absorption liquid outlet from filler space, can not be accumulated on filler and stops up filler space or air duct.Therefore, the present invention has simple to operate, the advantage that energy consumption is low, solved the filler blockage problem of traditional biological filtering technique, when air speed is 0.07m/s, the Pressure Drop of unit packed height is stabilized in 400Pa/m always, be equivalent to even lower than the current normal operating pressure of traditional biological filtering technique, and traditional biological filtering technique is while occurring that filler stops up, Pressure Drop can reach above (the list of references 1-3 of 4000pa/m, document 1: Zhou Weilie, Wang Jiade, Zheng Rongqin, Chen Jianmeng. the biological film-forming process of tower packing and characterisitic parameter research thereof. Zhejiang Polytechnical University's journal, 1999, 27 (4): 300～305.
Document 2: Guo Bingbing, Wang Yuren, He Fengyou, Mu Guizhi. the medium-sized test of Bio-deodorization of Waste Gas Escaping From Wastewater Treatment In Refinery. petroleum refining and chemical industry, 2005,36(5): 66～70.
Document 3: Gai Lina. the research of styrene organic exhaust gas bio-trickling purification method. Qingdao Technological University's academic dissertation, 2006.）。
(4) accompanying drawing explanation
Fig. 1 is blanket formula waste gas biofiltration device structural representation: 1-nutrient solution spray chamber ，2-filler chamber, and 3-nutrient solution reclaims chamber, 4-air inlet, 5-exhaust outlet, the import of 6-nutrient solution, the outlet of 7-nutrient solution, 8-blanket formula filler, 9-spray system, 10-nutrient solution collecting pit, 11-air-introduced machine, 12-compression pump.
(5) specific embodiment
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in this:
Embodiment 1:
With reference to Fig. 1, described blanket formula waste gas biofiltration device comprises that nutrient solution spray chamber 1, filler chamber 2, nutrient solution reclaim chamber 3, air inlet 4, exhaust outlet 5, nutrient solution entrance 6, nutrient solution outlet 7 and nutrient solution collecting pit 10, the upper end of described blanket formula waste gas biofiltration device is nutrient solution spray chamber 1, the lower end of blanket formula waste gas biofiltration device is that nutrient solution reclaims chamber 3, and described filler chamber 2 reclaims between chamber at nutrient solution spray chamber and nutrient solution, described nutrient solution spray chamber 1 top is provided with exhaust outlet 5, and side is provided with nutrient solution entrance 6, and inside is provided with spray system 9, described nutrient solution reclaims 3 sides, chamber and is provided with air inlet 4 and nutrient solution outlet 7, described air inlet 4 is communicated with air-introduced machine 11 by pipeline, described nutrient solution outlet 7 is communicated with nutrient solution collecting pit 10, described nutrient solution collecting pit 10 is communicated with nutrient solution import 6 by compression pump 12, described nutrient solution import 6 communicates with spray system 9, 2 blocks of blanket formula porous aggregates 8 of described filler chamber 2 vertical hanging, material is Polyurethane, described filling surface inoculation of activated-sludge or exhaust-gas treatment are used microorganism, described inoculation method is: will with the inoculum concentration of 2g/L packing volume, pour into after nutrient solution collecting pit until microbe inoculation or municipal wastewater treatment plant activated sludge, by elevator pump, the microorganism in nutrient solution collecting pit and nutrient solution are together fed to biofiltration device.The middle part that described filler chamber and nutrient solution spray chamber and nutrient solution reclaim contact position, chamber and filler chamber arranges respectively stainless steel crossbeam, the top of described blanket formula filler is fixed on the crossbeam of filler chamber and nutrient solution spray chamber contact position, the bottom of described blanket formula filler is fixed on filler chamber and nutrient solution reclaims on the crossbeam of contact position, chamber, and the centre of described blanket formula filler is fixed on the crossbeam of filler chamber middle part.
Described Tan Shi biofiltration device filler chamber dischargeable capacity is 20L, and described blanket formula porous aggregate thickness is 50mm, and vertical length is 1m, and lateral length is 0.2m, and described adjacent blanket formula porous aggregate level interval is 2mm; Described air inlet is positioned at nutrient solution and reclaims top, chamber, apart from nutrient solution, reclaims bottom, chamber 0.2m, and described nutrient solution outlet is reclaimed bottom, chamber 0.02m apart from nutrient solution, and described nutrient solution entrance is apart from nutrient solution spray chamber top 0.3m; Described spray system consists of pipeline and shower nozzle, and shower nozzle is the DN15 perforated pipe of polypropylene material, apart from the top 0.2m of filler chamber.Nutrient solution collecting pit length * wide * height: 0.3m * 0.3m * 0.4m.
Process the method for waste gas: open air-introduced machine, waste gas enters blanket formula waste gas biofiltration device by air-introduced machine, filler chamber being discharged by exhaust outlet flows through, opening pressure pump is sprayed onto filled chamber by the nutrient solution in nutrient solution collecting pit by nutrient solution spray system simultaneously, nutrient solution is indoor through the nutrient solution recovery of filler chamber's inflow exhaust gas biofiltration device lower end, then by nutrient solution, is exported and is entered nutrient solution collecting pit; The ratio of described nutrient solution spray flow and exhaust gas flow is 3:10000, described nutrient solution adopts starch, ammonium chloride, potassium hydrogen phosphate configuration to form, starch concentration is that 800mg/L, total phosphorus are that 6.8mg/L, ammonia nitrogen concentration are 90mg/L, pH5.6～6.0, and the nutrient solution in nutrient solution collecting pit upgrades 2000ml every day.
The waste gas object that test purifies is the waste gas containing dimethylbenzene, and xylene concentration is 1500～2000mg/m
3, result of the test is in Table 1.In blanket formula biofiltration device running, according to dimethylbenzene treatment effeciency, improve charge flow rate and process load, initial start stage dimethylbenzene is processed load and is controlled as 20g/ (m
3h), nutrient solution spray flow is 0.26L/h, and the ratio of nutrient solution spray flow and exhaust gas flow is 1:1000, and when dimethylbenzene clearance reaches 90% when above, it is gas flow 390L/h that gas flow improves 50%(, and nutrient solution spray flow is 0.39L/h); When dimethylbenzene, process load and reach 40g/ (m
3h) time, gas flow is along with dimethylbenzene clearance reaches 90% and to improve 30%(be gas flow 520L/h, and nutrient solution spray flow is 0.52L/h); When dimethylbenzene, process load and reach 60～75g/ (m
3h), time, start normally operation, now, gas flow 780L/h, nutrient solution spray flow is 0.78L/h, and its runnability is evaluated.Through the Start-up and operating performance of 6 months, dimethylbenzene clearance was stabilized in 90%～92%, and pressure differential is stabilized in 220pa, and now in emission gases, xylene concentration is 120～200mg/m
3.
Above result of study is compared with existing bio-filter technology, and under identical air speed, equal removal efficiency and processing load, the pressure differential of biofiltration device is stabilized in 220pa/m substantially, lower than traditional biological filtering technique, does not occur filler clogging.
Table 1 experimental test data
Claims (9)
1. a blanket formula waste gas biofiltration device, described filter comprises that nutrient solution spray chamber, filler chamber, nutrient solution reclaim chamber, air inlet, exhaust outlet, nutrient solution entrance, air-introduced machine, compression pump, nutrient solution outlet and nutrient solution collecting pit, the upper end of described blanket formula waste gas biofiltration device is nutrient solution spray chamber, the lower end of blanket formula waste gas biofiltration device is that nutrient solution reclaims chamber, and described filler chamber reclaims between chamber at nutrient solution spray chamber and nutrient solution; Described nutrient solution spray chamber top is provided with exhaust outlet, and side is provided with nutrient solution entrance, and inside is provided with spray system; Described nutrient solution reclaims side, chamber and is provided with air inlet and nutrient solution outlet, described air inlet is communicated with air-introduced machine by pipeline, described nutrient solution outlet is communicated with nutrient solution collecting pit, described nutrient solution collecting pit is communicated with nutrient solution import by compression pump, described nutrient solution import communicates with spray system, it is characterized in that some blocks of blanket formula porous aggregates of described filler chamber vertical hanging, described filling surface inoculation of activated-sludge or exhaust-gas treatment are used microorganism, described blanket formula porous aggregate thickness is 1～100mm, and described adjacent blanket formula porous aggregate level interval is 1～10mm.
2. blanket formula waste gas biofiltration device as claimed in claim 1, the aperture that it is characterized in that described blanket formula porous aggregate is 2～10mm.
3. blanket formula waste gas biofiltration device as claimed in claim 1, is characterized in that described adjacent blanket formula porous aggregate level interval is 2～5mm.
4. blanket formula waste gas biofiltration device as claimed in claim 1, is characterized in that described blanket formula porous aggregate thickness is 10～20mm.
5. blanket formula waste gas biofiltration device as claimed in claim 1, is characterized in that described blanket formula porous aggregate is that aperture is net prepared by 2～10mm high-molecular organic material, and filler proportion is 0.65～1.28g/cm
3.
6. blanket formula waste gas biofiltration device as claimed in claim 1, the middle part that it is characterized in that described filler chamber and nutrient solution spray chamber and nutrient solution recovery contact position, chamber and filler chamber arranges respectively crossbeam, the top of described blanket formula filler is fixed on the crossbeam of filler chamber and nutrient solution spray chamber contact position, the bottom of described blanket formula filler is fixed on filler chamber and nutrient solution reclaims on the crossbeam of contact position, chamber, and the centre of described blanket formula filler is fixed on the crossbeam of filler chamber middle part.
7. blanket formula waste gas biofiltration device as claimed in claim 1, it is characterized in that described air inlet is positioned at nutrient solution and reclaims top, chamber, apart from nutrient solution, reclaim bottom, chamber 0.2～2m, described nutrient solution outlet is reclaimed bottom, chamber 0～0.5m apart from nutrient solution, and described nutrient solution entrance is apart from nutrient solution spray chamber top 0.3～1.5m.
8. a method of utilizing blanket formula waste gas biofiltration device described in claim 1 to process waste gas, it is characterized in that described method is: open air-introduced machine, waste gas enters blanket formula waste gas biofiltration device by air-introduced machine, filler chamber being discharged by exhaust outlet flows through, opening pressure pump is sprayed onto filled chamber by the nutrient solution in nutrient solution collecting pit by nutrient solution spray system simultaneously, nutrient solution is indoor through the nutrient solution recovery of filler chamber's inflow exhaust gas biofiltration device lower end, then by nutrient solution, is exported and is entered nutrient solution collecting pit; The ratio of described nutrient solution spray flow and exhaust gas flow is 1～30:10000, the inorganic compound that described nutrient solution contains N, P and the mixing liquid that contains C, H, O organic compound.
9. blanket formula waste gas biofiltration device is processed the method for waste gas as claimed in claim 8, and other are that the ratio of described nutrient solution spray flow and exhaust gas flow is 5～10:10000.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105819574A (en) * | 2016-05-11 | 2016-08-03 | 上海泓济环保工程有限公司 | Biochemical device for integrally treating exhaust gas and sewage and treatment method thereof |
| CN105903341A (en) * | 2016-07-05 | 2016-08-31 | 贵州蔚蓝环保有限公司 | Biological deodorization drip filter box for purifying malodorous gases |
| CN106000082A (en) * | 2016-07-13 | 2016-10-12 | 盐城工学院 | Bio-trickling filter tower provided with rotary sprinkling device |
| CN106552503A (en) * | 2015-09-24 | 2017-04-05 | 魏晓明 | Integral biological oxidative deamination device of air and method |
| CN109173702A (en) * | 2018-11-05 | 2019-01-11 | 杨德俊 | A method of utilizing biological film process organic principle exhaust gas |
| CN109231498A (en) * | 2018-11-05 | 2019-01-18 | 杨德俊 | A method of utilizing biological film process organic sewage |
| CN109319947A (en) * | 2018-11-05 | 2019-02-12 | 杨德俊 | A kind of biofilm reactor |
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| CN2635665Y (en) * | 2003-07-09 | 2004-08-25 | 苏亿位 | Composite water treatment filling |
| CN200966983Y (en) * | 2006-11-21 | 2007-10-31 | 武汉理工大学 | Component type biology deodorization filtering tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106552503A (en) * | 2015-09-24 | 2017-04-05 | 魏晓明 | Integral biological oxidative deamination device of air and method |
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| CN105903341A (en) * | 2016-07-05 | 2016-08-31 | 贵州蔚蓝环保有限公司 | Biological deodorization drip filter box for purifying malodorous gases |
| CN106000082A (en) * | 2016-07-13 | 2016-10-12 | 盐城工学院 | Bio-trickling filter tower provided with rotary sprinkling device |
| CN106000082B (en) * | 2016-07-13 | 2019-05-24 | 盐城工学院 | A kind of bio-trickling filter with rotary spraying device |
| CN109173702A (en) * | 2018-11-05 | 2019-01-11 | 杨德俊 | A method of utilizing biological film process organic principle exhaust gas |
| CN109231498A (en) * | 2018-11-05 | 2019-01-18 | 杨德俊 | A method of utilizing biological film process organic sewage |
| CN109319947A (en) * | 2018-11-05 | 2019-02-12 | 杨德俊 | A kind of biofilm reactor |
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