CN113058422A - Biological trickling filter for treating organic waste gas sprayed - Google Patents
Biological trickling filter for treating organic waste gas sprayed Download PDFInfo
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- CN113058422A CN113058422A CN202110388688.5A CN202110388688A CN113058422A CN 113058422 A CN113058422 A CN 113058422A CN 202110388688 A CN202110388688 A CN 202110388688A CN 113058422 A CN113058422 A CN 113058422A
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- 239000007789 gas Substances 0.000 title claims abstract description 36
- 239000010815 organic waste Substances 0.000 title claims abstract description 29
- 239000002912 waste gas Substances 0.000 claims abstract description 62
- 238000012856 packing Methods 0.000 claims abstract description 60
- 244000005700 microbiome Species 0.000 claims abstract description 32
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 29
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 29
- 241001330002 Bambuseae Species 0.000 claims abstract description 29
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 29
- 239000011425 bamboo Substances 0.000 claims abstract description 29
- 239000003610 charcoal Substances 0.000 claims abstract description 29
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000007921 spray Substances 0.000 claims description 30
- 235000015097 nutrients Nutrition 0.000 claims description 22
- 239000003814 drug Substances 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 10
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- 239000008103 glucose Substances 0.000 claims description 6
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 6
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 6
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 claims description 6
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 238000010422 painting Methods 0.000 claims 9
- 230000000694 effects Effects 0.000 abstract description 30
- 230000015556 catabolic process Effects 0.000 abstract description 11
- 238000006731 degradation reaction Methods 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000012855 volatile organic compound Substances 0.000 description 39
- 238000000034 method Methods 0.000 description 19
- 238000001179 sorption measurement Methods 0.000 description 17
- 239000000243 solution Substances 0.000 description 15
- 239000000126 substance Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 5
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- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- -1 alcohol ethers Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 230000000593 degrading effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 150000003384 small molecules Chemical class 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
- B01D53/85—Biological processes with gas-solid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/95—Specific microorganisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0258—Other waste gases from painting equipments or paint drying installations
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Treating Waste Gases (AREA)
Abstract
The application relates to a biological trickling filter for treating spraying organic waste gas, which is characterized in that: the device comprises a tower body, an air inlet pipe and an air outlet pipe which are communicated with the tower body, a supporting component which is arranged in the tower body and can be used for waste gas to pass through, and a packing layer which is arranged above the supporting component and is enriched with microorganisms, wherein the packing layer comprises bamboo charcoal and ceramsite, the waste gas flow direction sequentially passes through the air inlet pipe, the packing layer and the air outlet pipe, a humidifying mechanism is arranged above the packing layer, the humidifying mechanism is communicated with a dosing mechanism, the bottom of the tower body is communicated with a recovery pipe, and the recovery pipe is communicated with a recovery box. The application has good treatment effect on the organic waste gas sprayed, the degradation efficiency can reach more than 95%, and the equipment has the advantages of small occupied area, high treatment efficiency, impact load resistance, simple and convenient management, low energy consumption and low treatment cost.
Description
Technical Field
The application relates to the field of spraying exhaust treatment devices, in particular to a biotrickling filter for treating spraying organic exhaust gas.
Background
With the rapid development of coating technology, the problem of air pollution caused by spraying organic waste gas is becoming more severe, wherein the spraying organic waste gas is mainly from the spray booth, the drying booth, the paint mixing booth and other working sections in the spraying process as an important component of air pollution, belongs to waste gas with low concentration and large air volume, and has the main pollution factors of Volatile Organic Compounds (VOCs) such as aromatic hydrocarbons, alcohol ethers, esters and the like, which not only pollute the atmospheric environment, but also have the adverse effects of carcinogenesis, teratogenesis and mutation on human bodies, so the treatment of the spraying organic waste gas is not gentle. At present, the domestic purification treatment method for organic waste gas mainly adopts a combustion method, an activated carbon adsorption method, a plasma method or a UV (ultraviolet) photolysis method.
The combustion method needs to adsorb and concentrate VOCs waste gas through active carbon or zeolite, then desorbs the VOCs waste gas through high-temperature gas, and finally carries out pyrolysis on the concentrated VOCs waste gas in a catalytic combustion or heat accumulation type thermal combustion mode, so that a large amount of heat energy is needed in the treatment process, and the energy consumption cost is high.
The activated carbon adsorption method is used for adsorbing the VOCs waste gas by utilizing the characteristics of internal pore structure and large specific surface area of the activated carbon, but is mainly used for treating VOCs waste gas with small air volume in laboratories, ovens and the like, and is difficult to effectively adsorb VOCs waste gas with large air volume, so that the treatment effect is poor.
The plasma method is to utilize plasma and electrons emitted by a high-voltage electrode to crack and oxidize the molecular structure of the VOCs waste gas to generate harmless substances, but the plasma method is limited by equipment and only can be used for treating the VOCs waste gas with small air volume, and the efficiency is low when the VOCs waste gas with large air volume is treated.
The UV photolysis method is to irradiate VOCs waste gas by using high-energy ultraviolet light beams to crack molecular bonds of the VOCs waste gas, so that pollutant atoms in a free state and ozone are oxidized and polymerized into small-molecule harmless or low-harmful substances such as CO2, H2O and the like, but the UV photolysis method has low efficiency and poor treatment effect when treating VOCs waste gas with large air volume.
In view of the above-mentioned related art, the inventors consider that the above-mentioned method has problems of high cost or low treatment efficiency when treating the organic waste gas for spraying.
Disclosure of Invention
In order to solve the problems of high cost or low treatment efficiency in the process of treating the spraying organic waste gas in the related art, the application provides a biological trickling filter for treating the spraying organic waste gas.
The application provides a biological trickling filter for handling spraying organic waste gas adopts following technical scheme:
the utility model provides a biotrickling filter for handling spraying organic waste gas, including the tower body, communicate in the intake pipe and the outlet duct of tower body, set up in the tower body and can supply the supporting component that waste gas passed and set up in supporting component top and the packing layer of enrichment microorganism, the packing layer includes bamboo charcoal and haydite, and the waste gas flow direction passes through in proper order the intake pipe the packing layer and the outlet duct, the packing layer top is provided with humidification mechanism, humidification mechanism intercommunication has medicine mechanism, the bottom intercommunication of tower body has the recovery tube, the recovery tube intercommunication has the collection box.
By adopting the technical scheme, a liquid film is formed on the surfaces of the bamboo charcoal and the ceramsite in the waste gas treatment process, when the waste gas passes through the packing layer, the bamboo charcoal and the ceramsite can adsorb the waste gas, VOCs in the waste gas is in contact with the liquid film on the surface of the packing and dissolved in water, and VOCs in the water solution is adsorbed and degraded by microorganisms, so that the VOCs are removed, the bamboo charcoal and the ceramsite have high porosity, large effective area, good gas and water permeability and high mass transfer rate, are particularly suitable for the attachment, growth and reproduction of the microorganisms on the surface of the bamboo charcoal and the ceramsite, can play a role in reducing the odor of the waste gas, the adsorption characteristics of the bamboo charcoal and the ceramsite are more beneficial to enriching the VOCs in the waste gas on the surface of the packing so that the VOCs are degraded by the microorganisms attached to the surface of the packing, the cells of the microorganisms are small, large in size, large surface area, strong in adsorption and various, H2O and other simple inorganic substances, the degradation efficiency can reach more than 95%, the treatment effect on the sprayed organic waste gas is good, and the method also has the advantages of small occupied area, high treatment efficiency, impact load resistance, simple and convenient management, low energy consumption and low treatment cost.
The humidifying mechanism is used for supplementing water to the packing layer at regular time, so that the surfaces of the bamboo charcoal and the ceramsite are kept moist and form a liquid film, the adsorption effect on VOCs in waste gas is improved, a moist growth environment is provided for microorganisms, the growth and the propagation of the microorganisms are facilitated, the microorganisms are kept good in activity, and the adsorption and degradation effects on the VOCs in the waste gas are improved.
The dosing mechanism is used for regularly dosing nutrient substances required by the growth of microorganisms to the packing layer, so that the microorganisms on the packing layer keep good activity, and the effect of adsorbing and degrading VOCs in the waste gas by the microorganisms is favorably improved.
The recovery tube and the recovery box are used for spraying residual water and nutrient solution to the packing layer to be recovered, the recovered mixed solution can be used for preprocessing of a waste gas preorder working section, water and the nutrient solution can be effectively utilized, the cost is saved, the treatment difficulty of the trickling filter tower on waste gas can be reduced, and the treatment effect is favorably improved.
Optionally, the volume ratio of the bamboo charcoal to the ceramsite is 1: 1.
the volume ratio of the bamboo charcoal to the ceramsite is controlled to be 1: 1, the cost is saved as far as possible under the effect of ensuring that VOCs in the waste gas can be well adsorbed and degraded, and the load on the supporting component can be reduced because the bamboo charcoal has strong water absorption capacity and large weight after water absorption and the ceramsite has light weight after water absorption.
Optionally, the particle size D50 of the bamboo charcoal and the ceramsite is 8-20 mm.
By adopting the technical scheme, the granularity D50 of the bamboo charcoal and the ceramsite is controlled to be 8-20mm, so that good adsorption and purification effects can be guaranteed, and the transmission rate of waste gas between fillers can be guaranteed.
Optionally, the stacking of the packing layer is 350-500 g/L.
Optionally, the specific surface area of the filler layer is more than 350m2/m 3.
Through adopting above-mentioned technical scheme, be favorable to improving the packing layer to VOCs's in the waste gas adsorption degradation effect.
Optionally, the humidification mechanism includes a water tank, a humidification pump communicated with the water tank, a spray pipe communicated with the humidification pump, and a nozzle arranged on the spray pipe, the spray pipe penetrates into the tower body, and the nozzle is located above the packing layer.
Through adopting above-mentioned technical scheme, carry out the humidification to the packing layer in water in through the spray header pump with the water in the water tank to the tower body through the humidification pump during humidification.
Optionally, the dosing mechanism comprises a dosing tank filled with nutrient solution, a dosing pump communicated with the dosing tank, and a dosing pipe communicated with the dosing pump, and the dosing pipe is communicated with the spray header.
Through adopting above-mentioned technical scheme, open the humidification pump simultaneously when adding the medicine, will add the nutrient solution in the medicine jar through adding the medicine pump in medicine pipe pump to spray water pipe, the nutrient solution mixes and dilutes with the water in the spray water pipe, then evenly sprays on the packing layer through the shower nozzle.
Optionally, the nutrient solution comprises monopotassium phosphate, urea, glucose and water, wherein the concentration of monopotassium phosphate is 45-55mg/L, the concentration of urea is 45-55mg/L, and the concentration of glucose is 35-45 mg/L.
The nutrient solution adopting the concentration ratio can meet the requirement of microorganisms on nutrient substances, reduce the waste of a large amount of nutrient substances and save the cost.
Optionally, the supporting component including connect in the bracing piece of tower body inner wall, set up in the support grid at bracing piece top and set up in the supporting network of support grid upper surface, the packing layer set up in on the supporting network.
Through adopting above-mentioned technical scheme, supporting component is used for supporting the filler, and support grid and supporting network can enough guarantee the normal circulation of waste gas, can avoid again that the filler drops.
Optionally, a partition plate is disposed above the supporting assembly to divide the space above the supporting assembly and the packing layer into two parts, and a communication part between the air inlet pipe and the tower body and a communication part between the air outlet pipe and the tower body are respectively located on two sides of the partition plate and above the packing layer.
Through adopting above-mentioned technical scheme, during the processing, waste gas can be earlier from one side of baffle through the packing layer, then flows through and pass through the packing layer once more from the opposite side of support assembly below from the baffle, then discharges from the outlet duct to carry out twice absorption degradation to waste gas and handle, improved the treatment effect of waste gas.
In summary, the present application includes at least one of the following beneficial technical effects:
the waste gas is adsorbed by the bamboo charcoal and the ceramsite, VOCs in the waste gas are enriched on the surface of the filler, and then the waste gas is degraded by the microorganisms on the filler, cells of the microorganisms are small in size, large in surface area, strong in adsorption and various in metabolism type, the VOCs in the waste gas can be effectively decomposed into simple inorganic substances such as CO2 and H2O, the degradation efficiency can reach more than 95%, the treatment effect on the sprayed organic waste gas is good, and the method has the advantages of small floor area, high treatment efficiency, impact load resistance, simplicity and convenience in management, low energy consumption and low treatment cost;
the humidifying mechanism is used for regularly supplementing water to the packing layer, so that the surface of the packing is kept moist and a liquid film is formed, the adsorption effect on VOCs in the waste gas is improved, a moist growth environment is provided for microorganisms, the growth and the propagation of the microorganisms are facilitated, the microorganisms are kept good in activity, and the adsorption degradation effect on the VOCs in the waste gas is improved;
nutrient substances required by the growth of microorganisms are regularly added to the packing layer through the dosing mechanism, so that the microorganisms on the packing layer keep good activity, and the adsorption and degradation effects of the microorganisms on VOCs in the waste gas are favorably improved;
the packing layer is divided into two parts by the arrangement of the partition plate, and waste gas can sequentially pass through the packing layer of the two parts during treatment, so that the two times of adsorption degradation treatment are carried out, and the treatment effect of the waste gas is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
description of reference numerals: 1. a tower body; 11. an air inlet pipe; 12. an air outlet pipe; 13. a recovery pipe; 14. a recycling bin; 21. a support bar; 22. a support grid; 23. a support net; 3. a filler layer; 41. a water tank; 42. a humidifying pump; 43. a spray header; 44. a spray head; 51. a medicine adding tank; 52. a dosing pump; 53. a medicine feeding pipe; 6. a separator.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses a biotrickling filter for treating spraying organic waste gas. Referring to fig. 1, the bio-trickling filter for treating sprayed organic waste gas comprises a tower body 1, an air inlet pipe 11 and an air outlet pipe 12 both communicated with the top of the tower body 1, a support component fixedly installed in the tower body 1 and allowing waste gas to pass through, and a packing layer 3 stacked above the support component and rich in microorganisms, wherein the packing layer 3 is composed of bamboo charcoal and ceramsite.
Referring to fig. 1 and 2, the support assembly includes a support rod 21 vertically and fixedly connected to the bottom of the inner wall of the tower body 1, a support grid 22 horizontally and fixedly installed on the top of the support rod 21, and a support net 23 fixedly laid on the upper surface of the support grid 22, the support net 23 is made of nylon, and the packing layer 3 is stacked on the upper surface of the support net 23.
Referring to fig. 1, the middle part of the upper surface of the supporting net 23 plate is vertically and fixedly provided with a partition plate 6, the top and the side of the partition plate 6 are both in sealing butt joint with the inner wall of the tower body 1, the space above the supporting net 23 plate and the packing layer 3 are equally divided into two parts by the partition plate 6, and the communicating part of the air inlet pipe 11 and the tower body 1 and the communicating part of the air outlet pipe 12 and the tower body 1 are respectively positioned on the two sides of the partition plate 6 and are both positioned above the packing layer 3.
When the waste gas is treated, the waste gas enters from the gas inlet pipe 11 and firstly passes through the packing layer 3 from one side of the partition plate 6, then flows through the lower part of the supporting component and passes through the packing layer 3 again from the other side of the partition plate 6, and then is discharged from the gas outlet pipe 12.
Referring to fig. 1, a humidifying mechanism for regularly replenishing water to the packing layer 3 is arranged above the packing layer 3, so that the surfaces of the bamboo charcoal and the ceramsite are kept moist and form a liquid film, which is beneficial to improving the adsorption effect on the VOCs in the waste gas and is also beneficial to the growth and propagation of microorganisms.
The humidifying mechanism comprises a water tank 41, a humidifying pump 42 communicated with the water tank 41, a spray pipe 43 communicated with the humidifying pump 42 and a plurality of spray heads 44 arranged on the spray pipe 43, wherein one end of the spray pipe 43 far away from the humidifying pump 42 horizontally penetrates into the tower body 1, and the plurality of spray heads 44 are all positioned above the packing layer 3. During humidification, the water in the water tank 41 is pumped into the tower body 1 through the humidifying pump 42 through the spray water pipe 43 to spray the packing layer 3, in the embodiment, the spray head 44 adopts the spiral spray head 44, and the spray angle of the spiral spray head 44 is large, so that the packing layer 3 can be uniformly sprayed.
The humidifying mechanism is communicated with a dosing mechanism which is used for regularly dosing nutrient substances required by the growth of microorganisms to the filler layer 3. The dosing mechanism comprises a dosing tank 51 filled with nutrient solution, a dosing pump 52 communicated with the dosing tank 51 and a dosing pipe 53 communicated with the dosing pump 52, wherein one end of the dosing pipe 53 far away from the dosing pump 52 is communicated with the spray water pipe 43. Open humidification pump 42 simultaneously when adding medicine, in medicine pump 52 will add nutrient solution pump to spray header 43 in the medicinal cupping 51, the nutrient solution mixes and dilutes with the water in the spray header 43, then sprays on packing layer 3 through shower nozzle 44 to make the microorganism on the packing layer 3 keep good activity, be favorable to improving microorganism to VOCs's in the waste gas adsorption and degradation effect.
The nutrient solution consists of monopotassium phosphate, urea, glucose and water, wherein in the embodiment, the concentrations of the monopotassium phosphate and the urea are both 50mg/L, and the concentration of the glucose is 40 mg/L. The concentration ratio can meet the requirement of microorganisms on nutrient substances, can reduce the waste of a large amount of nutrient substances and saves the cost.
Because the price of the bamboo charcoal is more expensive than that of the ceramsite, in order to save cost, the volume ratio of the bamboo charcoal to the ceramsite is 1: 1, a large amount of cost has been saved under the effect of guaranteeing to carry out good absorption degradation to VOCs in the waste gas, and because bamboo charcoal water-absorbing capacity is strong, and the weight is big after absorbing water, and the haydite is light after absorbing water, can reduce the load to supporting component.
In order to improve the treatment effect of the filler layer 3 on the VOCs in the exhaust gas, in this embodiment, the particle size D50 of the bamboo charcoal and the ceramsite is 12mm, the bulk density is 400g/L, and the specific surface area is 500 m2/m 3.
Referring to fig. 1, in order to further save the processing cost, the bottom of the tower body 1 is communicated with a recovery pipe 13, and one end of the recovery pipe 13 far away from the tower body 1 is communicated with a recovery tank 14. Residual water and nutrient solution are sprayed on the packing layer 3 in the waste gas treatment process and flow to the recovery box 14 through the recovery pipe 13 to be collected, the recovered mixed solution can be used for pretreatment of a waste gas preorder section, the water and the nutrient solution can be effectively utilized, the cost is saved, the treatment difficulty of the trickling filter tower on the waste gas can be reduced, and the treatment effect is improved.
The implementation principle of the biological trickling filter for treating the sprayed organic waste gas in the embodiment of the application is as follows: the bamboo charcoal and the ceramsite can form a liquid film on the surface of the bamboo charcoal and the ceramsite in the treatment process of waste gas, when the waste gas passes through the packing layer 3, the bamboo charcoal and the ceramsite can adsorb the waste gas, VOCs in the waste gas is in contact with the liquid film on the surface of the packing and is dissolved in water, and VOCs in the water solution is adsorbed and degraded by microorganisms, so that the VOCs are removed, the bamboo charcoal and the ceramsite have high porosity, large effective area, good gas and water permeability and high mass transfer rate, are particularly suitable for the microorganisms to attach to, grow and reproduce on the surface of the bamboo charcoal and can also play a role in reducing the odor of the waste gas, the adsorption characteristics of the bamboo charcoal and the ceramsite are more beneficial to enriching the VOCs in the waste gas on the surface of the packing so that the microorganisms attached to the surface of the packing can degrade the VOCs, the cells of the microorganisms are small, the surface area is large, the adsorption is strong, the metabolic types are various, the VOCs in the waste gas, the treatment effect on the sprayed organic waste gas is good, and the method has the advantages of small occupied area, high treatment efficiency, impact load resistance, simplicity and convenience in management, low energy consumption and low treatment cost.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a biological trickling filter for handling spraying organic waste gas which characterized in that: including tower body (1), communicate in intake pipe (11) and outlet duct (12) of tower body (1), set up in tower body (1) and the supporting component that can supply waste gas to pass and set up in supporting component top and packing layer (3) of enrichment microorganism, packing layer (3) include bamboo charcoal and haydite, and the waste gas flow direction is in proper order passed through intake pipe (11), packing layer (3) and outlet duct (12), packing layer (3) top is provided with humidification mechanism, humidification mechanism intercommunication has the medicine mechanism that adds, the bottom intercommunication of tower body (1) has recovery tube (13), recovery tube (13) intercommunication has collection box (14).
2. The biotrickling filter for treating organic waste gas after painting according to claim 1, characterized in that: the volume ratio of the bamboo charcoal to the ceramsite is 1: 1.
3. the biotricking filter for treating organic waste gas after painting according to claim 2, characterized in that: the particle size D50 of the bamboo charcoal and the ceramsite is 8-20 mm.
4. The biotrickling filter for treating organic waste gas after painting according to claim 1, characterized in that: the accumulation of the packing layer (3) is 350-500 g/L.
5. The biotrickling filter for treating organic waste gas after painting according to claim 1, characterized in that: the specific surface area of the filler layer (3) is more than 350m2/m 3.
6. The biotrickling filter for treating organic waste gas after painting according to claim 1, characterized in that: humidification mechanism includes water tank (41), communicate in humidification pump (42) of water tank (41), communicate in spray header (43) of humidification pump (42) and set up in shower nozzle (44) on spray header (43), spray header (43) penetrate in tower body (1), shower nozzle (44) are located packing layer (3) top.
7. The biotricking filter for treating organic waste gas after painting according to claim 6, characterized in that: the medicine adding mechanism comprises a medicine adding tank (51) filled with nutrient solution inside, a medicine adding pump (52) communicated with the medicine adding tank (51) and a medicine adding pipe (53) communicated with the medicine adding pump (52), and the medicine adding pipe (53) is communicated with the spray water pipe (43).
8. The biotricking filter for treating organic waste gas after painting according to claim 7, characterized in that: the nutrient solution consists of monopotassium phosphate, urea, glucose and water, wherein the concentration of the monopotassium phosphate is 45-55mg/L, the concentration of the urea is 45-55mg/L, and the concentration of the glucose is 35-45 mg/L.
9. The biotrickling filter for treating organic waste gas after painting according to claim 1, characterized in that: the supporting component comprises a supporting rod (21) connected to the inner wall of the tower body (1), a supporting grid (22) arranged at the top of the supporting rod (21) and a supporting net (23) arranged on the upper surface of the supporting grid (22), and the packing layer (3) is arranged on the supporting net (23).
10. The biotrickling filter for treating organic waste gas after painting according to claim 1, characterized in that: a partition plate (6) for dividing the space above the supporting assembly and the packing layer (3) into two parts is arranged above the supporting assembly, and the communication part of the air inlet pipe (11) and the tower body (1) and the communication part of the air outlet pipe (12) and the tower body (1) are respectively positioned on two sides of the partition plate (6) and are both positioned above the packing layer (3).
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| CN202110388688.5A CN113058422A (en) | 2021-04-12 | 2021-04-12 | Biological trickling filter for treating organic waste gas sprayed |
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| CN202110388688.5A CN113058422A (en) | 2021-04-12 | 2021-04-12 | Biological trickling filter for treating organic waste gas sprayed |
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| CN113058422A true CN113058422A (en) | 2021-07-02 |
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