CN103801191B - The equipment of biofiltration process foul smell and organic pollution - Google Patents
The equipment of biofiltration process foul smell and organic pollution Download PDFInfo
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- CN103801191B CN103801191B CN201410058676.6A CN201410058676A CN103801191B CN 103801191 B CN103801191 B CN 103801191B CN 201410058676 A CN201410058676 A CN 201410058676A CN 103801191 B CN103801191 B CN 103801191B
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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
Present invention is disclosed the equipment of a kind of biofiltration process foul smell and organic pollution, be mainly used in chemical environmental protection treatment, the field such as environmental pollution and purified treatment, it comprises the logical tower of spray and biofilter, cushion is comprised in described biofilter, biological bacteria filter course and exhaust level, biofilter material is filled with in described biological bacteria filter course, described spray leads to the cushion being sent to described biofilter after the spray of waste gas water is filtered by tower, described cushion is sent to biological bacteria filter course with all pressing after being cushioned by waste gas again, enter into exhaust level after described waste gas and described biofilter material fully react to discharge.Logical for spray tower combines with biofilter by the present invention, make the cleaning and filtering treatment effect of equipment to waste gas more obvious, the biological bacteria decomposition technique simultaneously adopted, can pollution factor completely in waste gas decomposition, reduce the pollution level of foul gas to air, and equipment overall structure is simple, easy to operate, there are good market prospects.
Description
Technical field
The present invention relates to foul waste gas and organic pollution processing technology field, especially relate to a kind of equipment biological bacteria being decomposed biofiltration process foul smell and the organic pollution combined with spray treatment and purification technology.
Background technology
Waste gas treatment equipment in existing market generally has spray column treatment facility, active carbon waste gas adsorption plant and carbon fiber filter equipment etc., in several treatment facility, the application of spray column treatment facility is comparatively general, primary structure is in a tower body, comprehensively be provided with tower body filler, spray equipment, dry demister, catch basin, water pump and mixer etc., the pollution gas soluble in water to some, or the waste gas of contamination particle dust with solubization, there is certain treatment effeciency, such as soda acid waste gas, organic volatile waste gas etc.Though the efficiency of spray column treatment facility process waste gas is high, the length of pipe of equipment is longer, and floor space is large, and can produce a large amount of spent shower water secondary pollutions.
Active carbon waste gas adsorption plant, main filling filtrate is activated carbon granule, and the adsorption function had by active carbon carrys out Purge gas pollutant, is applicable to process low concentration, the foul gas that high purification requires, thus reaches the requirement such as deodorizing, dedusting.But, it is relatively dry that the handling object of active carbon waste gas adsorption plant necessarily requires, without grease and the waste gas not having thickness dust material, the kind of process waste gas compares limitation, and active carbon waste gas adsorption plant is heavier, activated carbon granule is changed complicated and loaded down with trivial details, and the discarded activated carbon granule after replacing is suitable with new charcoal because regeneration cost is basic, and adsorptivity reduces, can only select to discard, become secondary pollution material.
Carbon fiber filter device, the emerging technique that development in recent years is got up, it is activated carbon fiber layers that activated carbon granule in active carbon waste gas adsorption plant is mainly filled filter material replacement by him, but owing to using carbon fiber filter cloth or filter cylinder, its production Technology requires higher, and production cost is not preponderated.
Summary of the invention
The object of the invention is to the defect overcoming prior art, the equipment of a kind of biofiltration process foul smell and organic pollution is provided, by spray treatment technology and biological bacteria decomposition technique are combined, to realize fully and up hill and dale purifying foul waste gas.
For achieving the above object, the present invention proposes following technical scheme: the equipment of a kind of biofiltration process foul smell and organic pollution, comprise the logical tower of spray and lead to described spray the biofilter that tower is connected, cushion is comprised in described biofilter, biological bacteria filter course and exhaust level, biofilter material is filled with in described biological bacteria filter course, described spray leads to the cushion being sent to described biofilter after the spray of waste gas water is filtered by tower, described cushion is sent to biological bacteria filter course with all pressing after being cushioned by waste gas again, enter into exhaust level after described waste gas and described biofilter material fully react to discharge.
Preferably, described spray leads to tower and comprises tower body, is positioned at the exhaust gas entrance of tower body side, arranges the liquid-accumulating trough of tower body inner bottom part, is arranged on tower body and is immersed in the circulating pump of described liquid-accumulating trough, and to be connected with described circulating pump and to be positioned at the screw spraying head of described tower body, described circulating pump controls described screw spraying head and evenly ejects atomized water, the waste gas entered in tower body through described exhaust gas entrance is fully contacted with described atomized water, atomized water accumulation after filtration, in described liquid-accumulating trough, recycles for described circulating pump.
Described liquid-accumulating trough is also provided with liquid-level switch and PH instrument, is convenient to adjust the liquid level in liquid-accumulating trough and pH value in time.
Described tower body is communicated with described biofilter by pipeline, and the waste gas in tower body is through the cushion of Cemented filling to biofilter.
Between described pipeline, be provided with centrifugal blower, waste gas is drawn in described tower body from described exhaust gas entrance by described centrifugal blower, and the waste gas in tower body after moistening is drawn into the cushion of described biofilter by pipeline.
Be separated by by filtrate gripper shoe between described cushion and described biological bacteria filter course, be separated by by fixed network board between described biological bacteria filter course and described exhaust level.
Uniform pore openings on the plate face of described filtrate gripper shoe and described fixed network board.
Described biofilter material is organic matter, and described organic matter comprises bark, pine roots, wooden wood chip, coco dry powder, and described biofilter material is formed with biological bacteria.
Operating temperature in described biofilter is 15 ~ 30 DEG C.
Described biofilter is also provided with gas discharge outlet, and described gas discharge outlet communicates with described exhaust level, is gone out by the gas discharging after up to standard for purification.
Compared with prior art, the invention has the beneficial effects as follows:
1, whole equipment divides two body structures, the pretreatment humidification of spray column and the advanced treating of biofilter is combined, and makes equipment more obvious to the cleaning and filtering treatment effect of waste gas, reduces the operating cost of equipment, decrease staffing simultaneously.
2, spray column treatment facility is optimized, by adopting circulating pump and liquid-accumulating trough, in spray tower body, define circulative spray liquid and precipitate and separate structure, make spray liquid can fully and exhaust gas contact, and make the maintenance trimming of whole equipment and member replacing more convenient.
3, biofilter is designed to the sandwich construction of more than three layers or three layers, to reluctant odor pollution gas, there is very strong treatment effect, reduce and stop the pollution of foul gas to atmospheric environment, and the operating cost of biofilter is low, there are good market prospects.
4, biological bacteria can be decomposed completely to the pollution factor in waste gas, can not produce the byproduct of harmfulness, and the biofilter material used is a kind of material of poisonless biological degradable, can pile fertilizer at any time after a procedure, do not produce filtrate discarded object, have good practicality.
5, equipment overall structure is simple, easy to operate, has good cost performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the equipment of biofiltration process foul smell of the present invention and organic pollution;
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Reference numeral: 1, the logical tower of spray, 11, tower body, 12, exhaust gas entrance, 13, liquid-accumulating trough, 14, screw spraying head, 15, circulating pump, 16, PH instrument, 17, liquid-level switch, 2, centrifugal blower, 21, base plate, 3, blow-off pipe valve system, 4, biofilter, 41, cushion, 42, biological bacteria filter course, 43, exhaust level, 44, filtrate gripper shoe, 45, biofilter material, 46, fixed network board, 47, gas discharge outlet, 48, transparent sight hole, 5, pipeline, 6, flange, 7, elbow.
Detailed description of the invention
Below in conjunction with accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme of the embodiment of the present invention.
Disclosed a kind of biofiltration process foul smell and the equipment of organic pollution, be mainly used in the fields such as chemical environmental protection treatment, environmental pollution and purification.Shown in composition graphs 1 and Fig. 2, the equipment of described biofiltration process foul smell and organic pollution comprises spray logical tower 1, centrifugal blower 2, blow-off pipe valve system 3 and biofilter 4, described spray leads to tower 1 for carrying out spray cleaning pretreatment to foul waste gas, described spray leads to tower 1 and comprises tower body 11, exhaust gas entrance 12, liquid-accumulating trough 13, screw spraying head 14 and circulating pump 15, described exhaust gas entrance 12 is arranged on described tower body 11 side, carries out pretreatment purification for being input to by waste gas in described tower body 11; Described circulating pump 15 is arranged on described tower body 11, and one end is connected with described screw spraying head 14, the other end is immersed in described liquid-accumulating trough 13, for the liquid cleaning cycle in liquid-accumulating trough 13 is flowed to screw spraying head 14, realize recycling of liquid in liquid-accumulating trough 13, improve the service efficiency of liquid, improve the problem easily producing secondary pollution in existing spray column process.
Described screw spraying head 14 is arranged in described tower body 11, and be positioned at the top of described liquid-accumulating trough 13, for spraying atomized water in tower body 11, atomized water is made to be evenly distributed in tower body 11, realize fully closely contacting of atomized water and waste gas, entirety carried out to waste gas moistening, dispose water-soluble pollution gas in waste gas simultaneously, or the waste gas of contamination particle dust with solubization, achieve the spray cleaning process to waste gas.
Described liquid-accumulating trough 13 is arranged on the bottom in described tower body 11, for filling purifying waste water of spray, simultaneously also for the waste liquid after accumulation purifying exhaust air, precipitates waste liquid, to recycle for circulating pump 15.
In addition, for the ease of adjusting pH value in described liquid-accumulating trough 13 and liquid level in time, the present invention is also provided with PH instrument 16 and liquid-level switch 17 on liquid-accumulating trough 13, and described PH instrument 16, for detecting the pH value in liquid-accumulating trough 13, adjusts the pH value in liquid-accumulating trough 13 in time according to the pH value detected; Described liquid-level switch 17, for adjusting the liquid level in liquid-accumulating trough 13 in time, is opened when liquid level exceedes, is closed after liquid level adjusts to desired value.
Described biofilter 4 is communicated with described tower body 11 by pipeline 5, for carrying out secondary deep purification to moistening waste gas.Described pipeline 5 is divided into plural section in a pre-installation, during splicing, adopts flange 6 or is welded and fixed be connected between section with section or between section with tower body.
In the process of actual installation pipeline, in order to realize the adjustment of the installation direction of pipeline, pipeline also can install elbow 7 additional, the direction of elbow 7 can adjust, namely in the present invention, the installation direction of pipeline 5 is not only confined to the direction of installing in Fig. 1, can require to adjust flexibly according to practice of construction.
Described centrifugal blower 2 is arranged between pipeline 5, for waste gas provides power, for waste gas is drawn in described tower body 11 from described exhaust gas entrance 12, and the waste gas in tower body 11 after moistening is drawn in described biofilter 4 by pipeline 5, the below of described centrifugal blower 2 is also provided with base plate 21, for supporting described centrifugal blower 2.Described centrifugal blower 2 can adopt plastic fan or fiberglass (FRP) blower fan, and these two kinds of blower fans all have very high suction air efficiency, and very little noise and vibration.
Described biofilter 4, for carrying out biological cleaning process to waste gas, adopts the pollution factor in a large amount of microorganism fungus kinds and waste gas fully to react, divides the pollution medium taken off in waste gas completely, thus reaches the complete catharsis of waste gas.Be designed to the sandwich construction of more than three layers or three layers in biofilter 4 described in the present invention, the embodiment of the present invention introduces the internal structure of living beings filter 4 with three layers of mechanism.
In embodiments of the present invention, three-decker in described biofilter 4 respectively is cushion 41, biological bacteria filter course 42 and exhaust level 43 from the bottom up, described cushion 41 is for playing cushioning effect to the moistening waste gas sucked through centrifugal blower, treat that moistening waste gas carries out short stay at cushion 41, enter into biological bacteria filter course 42 after reaching pressure uniform again and carry out biological cleaning, achieve evenly and fully purifying of moistening waste gas, avoid waste gas can not be purified completely because pressure is uneven.
Be separated by by filtrate gripper shoe 44 between described biological bacteria filter course 42 and described cushion 41, uniform pore openings (not shown) on the plate face of described filtrate gripper shoe 44, the hole of waste gas in filtrate gripper shoe 44 all after pressure enters in described biological bacteria filter course 42.The material of described filtrate gripper shoe 44 can adopt polypropylene (PP-H) corrosion-resistant material.
Biofilter material 45 is filled with in described biological bacteria filter course 42, described biofilter material 45 adopts organic matter, described organic matter can select the sawdust etc. after some barks, pine roots, wooden wood chip, coco dry grinding, these biofilter materials 45 are conducive to generation and the existence of biological inoculum, and be a kind of material of poisonless biological degradable, fertilizer can be piled at any time after a procedure, not produce filtrate discarded object.Pollution factor in moistening waste gas can decompose by biological bacteria that biofilter material 45 produces completely, can not produce the byproduct of harmfulness.
The rational height of described biological bacteria filter course 42 is arranged according to the size of exhaust emission concentration and biofilter 4, and can arrange multi-layer biological bacterium filter course 42 according to situations such as the concentration of waste gas.
Be separated by by fixed network board 46 between described exhaust level 43 and described biological bacteria filter course 42, identical with described filtrate gripper shoe 44, also uniform pore openings on the plate face of described fixed network board 46, and the material of described fixed network board 46 also can adopt polypropylene (PP-H) corrosion-resistant material, through described biological bacteria filter course 42 decomposing, purifying completely clean gas enter into exhaust level 43 from the hole described fixed network board 46.
Described biofilter 4 is also provided with gas discharge outlet 47 and transparent sight hole 48, described gas discharge outlet 47 communicates with described exhaust level 43, by purify in exhaust level 43 up to standard after gas discharging go out; Described transparent sight hole 48 is for observing the response situation of biofilter 4.
The profile of described biofilter 4 can be designed as body structure or tube structure or other shapes, and the operating temperature of biofilter 4 15 degree ~ 30 degree, optimum working temperature is about 25 degree.
Described blow-off pipe valve system 3 is connected with the cushion 41 of biofilter 4, for the discarded object produced in timely device for transferring purification process with the logical liquid-accumulating trough 13 of tower 1 of spray.
Material be made from polypropylene (PP-H) the thickening type material of the equipment of embodiment of the present invention biofiltration process foul smell and organic pollution makes, the welding procedure that automatic welding machine and human weld's machine match is adopted in equipment process, meet the standard-required of Germany's welding, equipment quality is more reliable.
Technology contents of the present invention and technical characteristic have disclosed as above; but those of ordinary skill in the art still may do all replacement and the modification that do not deviate from spirit of the present invention based on teaching of the present invention and announcement; therefore; scope should be not limited to the content that embodiment discloses; and various do not deviate from replacement of the present invention and modification should be comprised, and contained by present patent application claim.
Claims (7)
1. the equipment of a biofiltration process foul smell and organic pollution, it is characterized in that: comprise the logical tower of spray and lead to described spray the biofilter that tower is connected, cushion, biological bacteria filter course and exhaust level is comprised in described biofilter, biofilter material is filled with in described biological bacteria filter course, described spray leads to the cushion being sent to described biofilter after the spray of waste gas water is filtered by tower, described cushion is sent to biological bacteria filter course with all pressing after being cushioned by waste gas again, enters into exhaust level and discharge after described waste gas and described biofilter material fully react;
Described spray leads to tower and comprises tower body, is positioned at the exhaust gas entrance of tower body side, arranges the liquid-accumulating trough of tower body inner bottom part, is arranged on tower body and is immersed in the circulating pump of described liquid-accumulating trough, and to be connected with described circulating pump and to be positioned at the screw spraying head of described tower body, described circulating pump controls described screw spraying head and evenly ejects atomized water, the waste gas entered in tower body through described exhaust gas entrance is fully contacted with described atomized water, atomized water after described liquid-accumulating trough accumulation filters, recycles for described circulating pump;
Described tower body is communicated with described biofilter by pipeline, and the waste gas in tower body is through the cushion of described Cemented filling to biofilter;
Described biofilter material is organic matter, and the operating temperature in described biofilter is 15 ~ 30 DEG C.
2. the equipment of biofiltration process foul smell according to claim 1 and organic pollution, is characterized in that, described liquid-accumulating trough is also provided with liquid-level switch and pH instrument.
3. the equipment of biofiltration process foul smell according to claim 1 and organic pollution, it is characterized in that, centrifugal blower is provided with between described pipeline, waste gas is drawn in described tower body from described exhaust gas entrance by described centrifugal blower, and the waste gas in tower body after moistening is drawn into the cushion of described biofilter by pipeline.
4. the equipment of biofiltration process foul smell according to claim 1 and organic pollution, it is characterized in that, be separated by by filtrate gripper shoe between described cushion and described biological bacteria filter course, be separated by by fixed network board between described biological bacteria filter course and described exhaust level.
5. the equipment of biofiltration process foul smell according to claim 4 and organic pollution, is characterized in that, the plate face of described filtrate gripper shoe and described fixed network board is equipped with perforate.
6. the equipment of biofiltration process foul smell according to claim 1 and organic pollution, is characterized in that, described organic matter comprises bark, pine roots, wooden wood chip and coco dry powder.
7. the biofiltration process foul smell according to claim 1 ~ 6 any one and the equipment of organic pollution, it is characterized in that, described biofilter is also provided with gas discharge outlet, and described gas discharge outlet communicates with described exhaust level, is gone out by the gas discharging after up to standard for purification.
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Families Citing this family (6)
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CN104826483B (en) * | 2015-05-25 | 2017-01-04 | 永康市禄祥环保科技有限公司 | Biological purification method for paint spraying waste gas and organic waste gas |
CN107029547A (en) * | 2017-05-12 | 2017-08-11 | 湖北绿鑫生态科技有限公司 | A kind of new biofilter |
CN107376574A (en) * | 2017-09-04 | 2017-11-24 | 张荣军 | Flue filter |
CN109201023A (en) * | 2018-10-17 | 2019-01-15 | 陈育宁 | Sewage filtering material regenerating unit |
CN109201024A (en) * | 2018-10-17 | 2019-01-15 | 陈育宁 | A kind of sewage filtering material regenerating unit and application method |
CN109502669B (en) * | 2019-01-03 | 2024-08-16 | 青岛艾尔兄弟科技有限公司 | Membrane covered deodorizing system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201625503U (en) * | 2010-02-23 | 2010-11-10 | 湖北博实城乡环境能源工程有限公司 | High-concentration stench biological treatment device |
CN203244916U (en) * | 2013-05-09 | 2013-10-23 | 重庆融通机电设备有限公司 | Biological deodorization device for sewage treatment plant |
CN203725024U (en) * | 2014-02-21 | 2014-07-23 | 苏州依斯倍化学环保装备科技有限公司 | Equipment adopting biofiltration to treat stink and organic pollutants |
-
2014
- 2014-02-21 CN CN201410058676.6A patent/CN103801191B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201625503U (en) * | 2010-02-23 | 2010-11-10 | 湖北博实城乡环境能源工程有限公司 | High-concentration stench biological treatment device |
CN203244916U (en) * | 2013-05-09 | 2013-10-23 | 重庆融通机电设备有限公司 | Biological deodorization device for sewage treatment plant |
CN203725024U (en) * | 2014-02-21 | 2014-07-23 | 苏州依斯倍化学环保装备科技有限公司 | Equipment adopting biofiltration to treat stink and organic pollutants |
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