CN201189448Y - Novel fillers for biological treatment of waste gas - Google Patents
Novel fillers for biological treatment of waste gas Download PDFInfo
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- CN201189448Y CN201189448Y CNU200720183629XU CN200720183629U CN201189448Y CN 201189448 Y CN201189448 Y CN 201189448Y CN U200720183629X U CNU200720183629X U CN U200720183629XU CN 200720183629 U CN200720183629 U CN 200720183629U CN 201189448 Y CN201189448 Y CN 201189448Y
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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
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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 utility model belongs to the technical field of waste gas biological treatment, and in particular relates to a novel filler for waste gas biological treatment. Two corrugated support boards are once-molded through a middle circular ring; the two support boards are perpendicular to each other; and the support boards and the circular ring are once-molded through injection by modified high polymers. The filler for waste gas biological treatment has the advantages of high void ratio and large specific surface area.
Description
[technical field]
The utility model belongs to waste gas biologic treating technique field, particularly a kind of filler of new waste gas biological treatment usefulness.
[background technology]
In waste gas biological treatment field, filler is the alternate place that contacts and finish conversion of gas-liquid with equipment, is vital.Filler is biological carrier, and carrier performance directly influences and biological adheres to the operational effect of system.The waste gas biologic treating technique is a waste gas biofiltration purification treatment technology, its basic principle is the microorganism that grows attached on the biologic packing material medium, under the adapt circumstance condition, utilizes pollutant in the waste gas as the carbon source and the energy, keep its vital movement, the pollutant in the waste gas is decomposed into CO
2, H
2O and as inorganic salts such as sulfate, thus waste gas is purified.
In the existing waste gas biological treatment, many natural or artificial materials are applied as microbe carrier, as volcanic rock, wood chip, compost, plastics and metallic plate ripple packing, porous ceramics, porous carbon, polysulfone hollow fibre, carbon fiber, polyurethane foam etc.; Natural stuffing such as compost, chips, stalk, peat etc. itself have nutritional labeling, need not to add nutriment, but obstruction, compacting easily; Artificial materials such as porous ceramics, porous carbon, polysulfone hollow fibre, carbon fiber, polyurethane foam are the required nutritional labeling of inanimate object growth then, in waste gas treatment process, need add nutriment.In recent years, the fiberglass material filler etc. that some processing " triphens " also occurred.Though it can both play certain treatment effect, but still there are high easy stifled, the problems such as power consumption is big, easily conglomeration, fracture of wire, service life is short, cultivation biofilm speed is slow, the starting time of going into operation is long of valency.
The development of Biotrickling filter (BTF) technology makes the waste gas biologic treating technique be not limited only to handle low concentration gas or organic exhaust gas, and can be applicable to handle high concentration H
2S waste gas is the Biotrickling filter of filler as calendar year 2001 Los Angeles,U.S sewage disposal station-service polyurethane foam, has replaced original chemical bases absorption tower to handle the H2S waste gas that contains 180～260mg/m3, has obtained success.
At present, external the most frequently used BTF filler is volcanic rock (lava rock), and its advantage is that specific area is big, porous, microorganism are bred easily, and price is low, and shortcoming is that chemical inertness is bad than great, and its weight minimizing is observed in operation under low pH situation.Huddle formula plastics, pottery or stainless steel Pall ring and also be widely used in laboratory research and industrial, this filler is handled easily, but experience shows that its start-up period is long, and this is because its surperficial biomembrane is not easy to hang up.
Efficient BTF filler, there is the netted foam stuffing of the polyurethane that reaches 10 years service life in U.S. Bioway company; Japan has proportion 0.2, the porosity 83%, specific retention to reach 200% light porous pottery, and there is polyurethane through hole type foamed plastics disk etc. in Germany; Tongji University has developed the BTF filler of ACOF (being that fiber adheres to active carbon and stainless steel cloth), but its resistance drop is bigger: when the air-flow linear speed was 20～25mm/s, resistance drop reached 100～200mm/m under the biofilm situation; In the period of 2003～2006, though Zhejiang Polytechnical University is in conjunction with two kinds of BTF fillers of waste gas biological treatment The project, though its serviceability is good, resistance reduces, but remain at the manufacturing cost height, in waste gas under the pollutional load condition with higher, along with the raised growth of microorganism still has the part clogging.
[summary of the invention]
The utility model discloses a kind of filler of new waste gas biological treatment usefulness, it has the advantage that voidage is big, specific area is big.
Technical solution adopted in the utility model: a kind of filler of new waste gas biological treatment usefulness, one-body molded by middle annulus by two-layer waveform support plate, two-layer support plate is vertical mutually; Support plate and annulus adopt the modified high-molecular polymer through the injection moulding one-shot forming.
Described filler, the modified high-molecular polymer adds antioxidant, hydrophilizing agent, stabilizing agent, adsorbent.
Described filler, filling surface is coarse, and is provided with burr.
Described filler, the support plate outside is curved, and the arc outside of all support plates forms a sphere.
Described filler is established 9 of support plates for every layer, and annulus is established 3.
The waste gas biologic treating technique is a waste gas biofiltration purification treatment technology, its basic principle is the microorganism that grows attached on the biologic packing material medium, under the adapt circumstance condition, utilizes pollutant in the waste gas as the carbon source and the energy, keep its vital movement, the pollutant in the waste gas is decomposed into CO
2, H
2O and inorganic salts (as sulfate etc.), thus waste gas is purified.
Two kinds of the main decomposing biological filter bed of the reactor of waste gas biological treatment (Biofilter is called for short BF) Biotrickling filters (Biotrickling Filter is called for short BTF).
BF technology is usually with porous such as compost, peat or wood chip after treatment or bark, sawdust, leaves of plants bars and the material that keeps the moisture ability is more by force arranged as microbe carrier, about 1.0～1.5 meters of packing layer thickness, area is decided according to handling gas flow and treatment effect; And by the waste gas pre-humidifying or intermittently sprinkle contain the aqueous solution of inorganic nutrient salt so that bed remains on the gas permeability that suitable moisture content scope is become reconciled, so that the environment of suitable growth of microorganism and breeding to be provided.Biological absorption and biodegradation can take place in this bacteria bed simultaneously, and microorganism fungus kind can long preservation, be applicable to handle that pollutant levels are lower, waste gas intermittent discharge or water-soluble relatively poor organic exhaust gas.Fig. 1 is biofiltration (BF) system diagram.
BTF technology uses inert material such as porous ceramics ring, baton round etc. as microbe carrier usually, and continuously sprinkle contains the recirculated water of inorganic nutrient salt, and the biomembrane that makes waste gas and drip apposition growth on the filler in the filter bed contacts the effect of generation contaminant degradation.Because nutrient solution circulates continuously, so metabolite can in time be got rid of, and reaction condition such as pH may be fine controlled, and micro organism quantity is big, thus efficient than BF technology height, but investment cost and automation control requirement height.Fig. 2 is bio-trickling (BTF) system diagram.
The main distinction of the two such as following table:
| Project | Bacteria bed | Biotrickling filter |
| Filler | Porous, water absorption rate and specific retention are good, the voidage height, absorption property is good, is generally natural material. | Porous, the inert material that specific area is big, the easy apposition growth of microorganism also comes off easily. |
| The spray mode | Intermittently, as several times/day, a few minutes/time | Dynamically continuously |
| Applicable situation | Suitable concentration of treatment lower (≤1000mg/m3), the waste gas of intermittent discharge or poorly water-soluble | Being suitable for the higher and metabolite of concentration of treatment is the waste gas of acidic materials |
| The pollutant removal load | Lower | High |
| Operating cost | Lower | Low |
| Major defect | Reaction conditions such as bed pH are not easy control | Because of the microorganism undue growth may cause stopping up |
Filler is the mass transfer intermediary of gas-liquid two-phase in the waste gas purification bioprocess, is the core of device, and the improvement of waste gas biologic treating technique and development largely are reflected in the improvement and development of filler.According to the basic principle of waste gas biological treatment, the biomembrane that make filler forms fast and mount volume is many and active high, and mass-transfer performance is good, and desirable waste gas biological treatment filling carrier requires to have following characteristic:
1. biomembrane carry performance and mass-transfer performance are good
The contact gear ratio surface area is big, internal voids rate height.Obviously, packing specific area is big, internal voids rate height can provide more growth of microorganism space, make more biomembrane can depend on the filling surface growth, also help and aging and active low biomembrane can in time peel off and take away from the filler space with washing water, remove microbial metabolic products simultaneously.
High specific area also can promote the transfer of pollutant from the gas phase to the liquid phase in the waste gas, helps clearance and improves.Yet specific area (m2/m3) neither be the bigger the better, and because of after long-time running, because biomembranous growth can cause hole to reduce, bed resistance increases.Also to help simultaneously the transmission of oxygen and pollutant matrix.
The mass-transfer performance of filler depends mainly on shape, specific area, voidage, packed structures and the surface hydrophilicity of filler.The surface of filler has only by the liquid phase that flows wetting, could constitute effective mass transfer area, therefore will obtain high mass transfer rate, and except that big specific area, also requiring filler that good wettability is arranged is hydrophily.The packing layer structure voidage of An Zhuaning wants high simultaneously, makes gas-liquid flow unimpeded and the air-flow pressure drop is low, the operating flexibility wide ranges.In addition, packing layer will possess equally distributed shape of the gas-liquid of being beneficial to and structure, with flow-shape and the oxygen transfer rate between the raising filler, and then promotes mass transport process, realizes biomembranous continual renovation.
In addition, the degree of roughness on filling carrier surface, electrostatic interaction and hydrophily also influence biofilm speed to a certain extent, it is generally acknowledged the big biofilm easily of roughness; Bacterium belongs to hydrophilic particles, so the hydrophily of carrier surface also can promote biomembranous formation and adhere to; Because bacterium surface isoelectric point Pi is many between 2～5, when the pH of recirculated water or shower water＞pi, bacterium surface is electronegative, on the contrary positively charged then, so the electric polarity of carrier surface has certain influence to the formation biomembrane.
2. the stream pressure loss is little and stable
Use the filler of high voidage, can reduce air communication and cross the resistance drop of packing layer, lower density and enough physical strengths and rigidity can reduce the accumulation pressure of packing layer and keep the stable of the whole physico-chemical property of bed, thereby make the biologic packing material bed remain low gas-flow resistance loss.Obviously this also is very important carrier performance, the power and the power consumption that mainly are blower fan because of the energy consumption and the operating cost of BFP technology.
3. best growth of microorganism environment can be provided
Microorganism optimum growh environment mainly is the temperature (25～35 ℃ of the bests) that keeps suitable and moisture content, certain pH range, enough makes carbon source and the inorganic nutrients that it is essential that microbial cell is grown.
Growth of microorganism and metabolic process be unable to do without water, and keeping suitable water content is to keep the microbial activity primary condition.
In BTF technology, above-mentioned factor all can be controlled by recirculated water (promptly keeping the certain temperature of recirculated water, pH scope and inorganic nutrients components and concentration).But in BF technology, these factors mainly depend on the character of BF filler, wherein have: water retention property, pH shock-absorbing capacity, whether contain nutriment etc.
4. chemistry and physical property are stable
Require the physico-chemical property of their energy stable for extended periods of time under humidity, corrosivity even sour environment, corrosion-resistant and difficult decomposition is rotted, and particularly requires its long-term certain physical strength and rigidity, suitable specific area, density and voidage of keeping.With can be under long-term operating position, the biologic packing material bed be indeformable, and filling batch is not compacted, and remains the good environment of growth of microorganism.Obviously, have only the stable of filler chemistry and physical property, the stable of biologic packing material bed bioreactor removal effect just arranged.
Another stable effect of filler chemistry and physical property is can remain to drench comparatively cleaning of water outlet, and therefore, the BTF filler adopts inertia or synthetic material to make usually, and when the raw material of selection and exploitation BF filler, also need consider this factor.
5. cost
Because the expense of filler accounts for the large percentage of waste gas biological treatment total investment of engineering, therefore selecting raw material cheap and easy to get to make biologic packing material is the key factor that must consider.
By the technical solution of the utility model, this filler has the following advantages:
1, biomembrane carry performance and mass-transfer performance are good
Coarse and the slightly little burr of this filling surface, the contact gear ratio surface area is big, internal voids rate height, more growth of microorganism space can be provided, make more biomembrane can depend on the filling surface growth, also helping aging and active low biomembrane can in time peel off and take away from the filler space with washing water, removes microbial metabolic products simultaneously, promote the good metabolism of biomembrane, do not stop up again.High specific area also can promote the transfer of pollutant from the gas phase to the liquid phase in the waste gas, helps clearance and improves.
The mass-transfer performance of filler depends primarily on shape, specific area, voidage, packed structures and the surface hydrophilicity of filler.The surface of filler has only by the liquid phase that flows wetting, could constitute effective mass transfer area, therefore will obtain high mass transfer rate, and except that big specific area, also requiring filler that good wettability is arranged is hydrophily.Secondly, bacterium belongs to hydrophilic particles, so the hydrophily of carrier surface also can promote biomembranous formation and adhere to.The hydrophilizing agent that the filler of this new and effective waste gas biological treatment usefulness adds just by above principle, has obviously improved the mass-transfer performance of filler.This packing layer structure voidage height simultaneously, gas-liquid flow is unimpeded and the air-flow pressure drop is low, the operating flexibility wide ranges.In addition, this packing layer possesses equally distributed shape of the gas-liquid of being beneficial to and structure, has improved flow-shape and oxygen transfer rate between filler, and then promotes mass transport process, realizes biomembranous continual renovation.Moreover the degree of roughness on filling carrier surface and hydrophily have also improved biofilm speed to a certain extent.
2, the stream pressure loss is little and stable
This filler voidage height can reduce the resistance drop that air communication is crossed packing layer.Lower density and enough physical strengths and rigidity can reduce the accumulation pressure of packing layer and keep the stable of the whole physico-chemical property of bed, thereby make the biologic packing material bed remain low gas-flow resistance loss.Because the energy consumption of BFP technology and power and the power consumption that operating cost mainly is blower fan, so this filler also has certain advantage aspect cutting down the consumption of energy.
3, can provide best growth of microorganism environment
Microorganism optimum growh environment mainly is the temperature (25～35 ℃ of the bests) that keeps suitable and moisture, certain pH range, enough makes carbon source and the inorganic nutrients that it is essential that microbial cell is grown.Add additives such as antioxidant, hydrophilizing agent, stabilizing agent, adsorbent in this filler, can provide microbial cell required nutriment, improved the speed of biofilm greatly.
4, chemistry and physical property are stable
The physico-chemical property of this filler energy stable for extended periods of time under humidity, corrosivity even sour environment, rot corrosion-resistant, the difficult decomposition, and particularly it can keep certain physical strength and rigidity, suitable specific area, density and voidage for a long time.Under long-term operating position, the biologic packing material bed is indeformable, and filling batch is not compacted, and remains the good environment of growth of microorganism, long service life.
Chemistry that this filler is stable and physical property have ensured the stability of biologic packing material bed bioreactor removal effect effectively, and it is comparatively clean to remain the pouring water outlet.
5, cost is low.
In sum, this filler is that a kind of performance is good, cost is low, resistance drop is little, stable in properties, the exhaust-gas treatment high-performance bio filler of difficult obstruction and long service life.
[description of drawings]
Fig. 1 is biofiltration (BF) system diagram.
Fig. 2 is bio-trickling (BTF) system diagram.
Fig. 3 is a perspective view of the present utility model.
Fig. 4 is another perspective view of the present utility model.
Fig. 5 is a vertical view of the present utility model.
Fig. 6 is a partial sectional view of the present utility model.
Fig. 7 is a half sectional view of the present utility model.
Fig. 8 is a partial view of the present utility model.
[specific embodiment]
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 1, 2, the 61st, air inlet, the 62nd, conditioning Tower, the 63rd, Purge gas, the 64th, packing area, 65 circulation fluids.
Shown in Fig. 3-8, it is two-layer up and down 1,2 that this filler comprises, the every layer of 9 waveform support plate 3 that be arranged in parallel link to each other by middle annulus 4 (comprising three annulus 41,42,43) between two-layer support plate, and support plate 3 and three annulus are perpendicular, and two-layer support plate is also vertically mutual; Outermost a slice support plate of every layer of support plate also links to each other with an arc support plate 5, and every layer has two arc support plates 51,52, and arc support plate 5 links to each other with annulus 43 again.Each support plate outside is curved, and the arc outside of all support plates constitutes a sphere.Filler adopts high molecular polymer, and in addition additives such as antioxidant, hydrophilizing agent, stabilizing agent, adsorbent through special Shooting Technique one-shot forming, its rough surface, and slightly little burr.
Claims (4)
1, a kind of filler of new waste gas biological treatment usefulness is characterized in that one-body molded by middle annulus by two-layer waveform support plate, two-layer support plate is vertical mutually; Support plate and annulus adopt the modified high-molecular polymer through the injection moulding one-shot forming.
2, filler according to claim 1 is characterized in that, filling surface is coarse, and is provided with burr.
3, filler according to claim 1 is characterized in that, the support plate outside is curved, and the arc outside of all support plates forms a sphere.
4, filler according to claim 1 is characterized in that, establishes 9 of support plates for every layer, and annulus is established 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720183629XU CN201189448Y (en) | 2007-10-10 | 2007-10-10 | Novel fillers for biological treatment of waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720183629XU CN201189448Y (en) | 2007-10-10 | 2007-10-10 | Novel fillers for biological treatment of waste gas |
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| Publication Number | Publication Date |
|---|---|
| CN201189448Y true CN201189448Y (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU200720183629XU Expired - Fee Related CN201189448Y (en) | 2007-10-10 | 2007-10-10 | Novel fillers for biological treatment of waste gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989311A (en) * | 2012-11-16 | 2013-03-27 | 孙绍堂 | Manufacture method of biological deodorizing filling material and biological deodorizing filling material |
| CN105854840A (en) * | 2016-04-18 | 2016-08-17 | 上海品境节能环保科技有限公司 | Filter material modifying method for biological trickling filter |
| CN109304083A (en) * | 2018-09-14 | 2019-02-05 | 铜陵市天峰汽车维修服务有限责任公司 | A kind of dedicated moisture retention filler of bio-trickling filter |
-
2007
- 2007-10-10 CN CNU200720183629XU patent/CN201189448Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989311A (en) * | 2012-11-16 | 2013-03-27 | 孙绍堂 | Manufacture method of biological deodorizing filling material and biological deodorizing filling material |
| CN102989311B (en) * | 2012-11-16 | 2015-01-21 | 孙绍堂 | Manufacture method of biological deodorizing filling material and biological deodorizing filling material |
| CN105854840A (en) * | 2016-04-18 | 2016-08-17 | 上海品境节能环保科技有限公司 | Filter material modifying method for biological trickling filter |
| CN105854840B (en) * | 2016-04-18 | 2018-06-22 | 上海品境节能环保科技有限公司 | A kind of bio-trickling filter modification of filtration medium method |
| CN109304083A (en) * | 2018-09-14 | 2019-02-05 | 铜陵市天峰汽车维修服务有限责任公司 | A kind of dedicated moisture retention filler of bio-trickling filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hangzhou Tianyu Environmental Protection Engineering Co., Ltd. Assignor: Lin Yunming Contract record no.: 2011330000358 Denomination of utility model: Novel fillers for biological treatment of waste gas Granted publication date: 20090204 License type: Exclusive License Record date: 20110427 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 Termination date: 20131010 |