CN115228283A - Waste gas deodorization treatment method - Google Patents
Waste gas deodorization treatment method Download PDFInfo
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- CN115228283A CN115228283A CN202210912102.5A CN202210912102A CN115228283A CN 115228283 A CN115228283 A CN 115228283A CN 202210912102 A CN202210912102 A CN 202210912102A CN 115228283 A CN115228283 A CN 115228283A
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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
-
- 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
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/95—Specific microorganisms
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- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- 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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- Treating Waste Gases (AREA)
Abstract
The invention discloses a waste gas deodorization treatment method, and provides a waste gas treatment system which comprises a fan, a collection system, a biological deodorization tower body, a spraying system, a biological packing layer, a dosing system, an air distribution system, a drainage system, a water collection system and a biological filter which are connected in sequence. The odor decomposed by the microorganisms does not need too much external energy, and the organisms propagate and excrete to maintain the survival and the vitality of the organisms. It can effectively remove the odor substances such as H2S, reduction sulfide and the like in the waste gas, has high removal rate, low operation cost and simple operation and management, and is an ideal purification technology for solving the problem of pollution of the malodorous gases such as H2S and the like and further protecting the atmospheric environment.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a novel deodorization technology for livestock and poultry breeding plants.
Background
In recent years, with the rapid development of economy, the living standard of people is increasingly improved, and the large-scale cultivation becomes a trend of the development of livestock and poultry breeding industry. However, the feces and urine discharged from large-scale livestock and poultry farms and the generated harmful gases such as ammonia gas, hydrogen sulfide, skatole, indole, trimethylamine, acrolein and the like are not beneficial to the sustainable development of the livestock and poultry industry, the odor can damage the epithelial cells of the respiratory tract of animals, the occurrence of respiratory diseases is increased, and the production cost is increased by about 10% due to the occurrence of typical pneumonia. They not only affect the normal growth and production performance of livestock and poultry, but also affect the living environment and even the health of surrounding residents.
Disclosure of Invention
The invention aims to provide a deodorization technology for a livestock and poultry breeding plant to solve the problem of deodorization of the breeding plant in the background technology.
In order to achieve the purpose, the invention provides a process scheme: the combined process of spraying and washing and biological filter. The biological deodorization process has obvious advantages in the aspects of operation cost, treatment efficiency, service life and the like, and the project adopts the biological deodorization process as a main treatment process and utilizes microorganisms to carry out degradation treatment on VOCs substances and conventional odor components such as ammonia, hydrogen sulfide and odor concentration. Because the existing water mist mixed micro-bubble injection equipment of the current deodorization equipment is similar to the treatment principle of spray washing, the existing water mist mixed micro-bubble injection equipment is suggested to be added with an alkali washing function, and a biological filter is added at the rear end.
The technical scheme is as follows:
a deodorization technology process for livestock and poultry breeding plants is characterized in that a biological deodorization integrated device is a subject link of a deodorization system and comprises a deodorization tower main body, a spraying system, a gas distribution system, a drainage system, a dosing system and a biological filter.
Preferably, in the deodorization technology process for the livestock and poultry breeding plant, the deodorization tower is of a module assembly type tower-shaped structure, is made of alloy and glass Fiber Reinforced Plastic (FRP), is of a fully closed structure, and is provided with reasonable access holes, air inlet holes, air outlet holes and the like.
Preferably, in the deodorization technology process for the livestock and poultry breeding plant, the deodorization tower is divided into four areas: the atomizing and spraying system on the upper layer, the biological filler filter layer in the middle, the biological filler support system on the lower part, and the gas distribution system and the waste liquid collection system at the bottom.
Preferably, in the deodorization technology process for the livestock and poultry breeding plant, the biological filler combined filler is adopted in the biological filler filtering layer.
Preferably, in the deodorization technology process for the livestock and poultry breeding plant, the air distribution system is provided with the reticular air distribution grid plate, and the air distribution grid with thin pores is laid on the reticular air distribution grid plate so as to meet the requirement of filler accumulation. The odor enters the filling area through the gap between the porous plate and the air distribution grid.
Preferably, in the deodorization technology process for the livestock and poultry breeding plant, the spraying part of the deodorization system mainly comprises a spray water pump, a spray pipeline system, an electromagnetic switch system, a metering detection system, a liquid level control system, an automatic water replenishing device, an atomization sprayer and the like.
Preferably, in the deodorization technology process for the livestock and poultry breeding plant, the power source of the deodorization system is a deodorization fan, odor enters the deodorization device stably and uniformly through the collection system under the pressure provided by the fan, and the gas subjected to deodorization in the device is sucked, lifted and discharged through the fan.
Preferably, in the deodorization technology process for the livestock and poultry breeding plant, the dosing system adopts a metering pump to quantitatively dose the nutrient, the dosing flow is 200L/min, the flow is adjustable, and the dosing is carried out by directly connecting a dosing pipe to a water outlet main pipe of a spray water pump. The dosing pipe is provided with an electromagnetic valve and a dosing pump which are in linkage control, and the dosing pipe is started and stopped simultaneously, and the diluted medicament is sprayed on the biological region filler through an atomization sprayer.
The beneficial effects obtained by the invention are as follows:
(1) The invention utilizes the biological deodorization integrated device as a main link of the deodorization system, and high-concentration odor is purified in the link.
(2) The deodorizing tower is filled with biochar combined filler in irregular block shape, and has the features of high porosity, large effective area, high gas and water permeability, fast mass transfer rate, etc. and is especially suitable for the attachment, growth and propagation of microbe on its surface. The deodorizing tower utilizes the adsorption characteristic of carbon to enrich H2S and organic matters in the odor on the surface of the biological carbon combined filler, and then shows high-efficiency purifying capacity through the comprehensive action of degradation and filtration of various microorganisms attached to the surface of the filler. The method for treating the odor by using the biochar combined filler has the advantages of stable treatment effect, land occupation saving, high efficiency, impact load resistance, simple and convenient management, low operation cost and suitability for treating odor with various concentrations.
(3) The special dosing dilution water pump and the special spraying device are not arranged in the dosing process in the technical design, and the dosing pipe is directly connected to the atomizing spraying device to spray on the biological region filler to dose the medicament. The mixed solution of potassium dihydrogen phosphate, urea and industrial glucose is added periodically to supplement the nutrient elements such as nitrogen, phosphorus and potassium required by the growth of the microorganisms, so as to maintain the activity of the microorganisms inhabiting the biological filler.
(4) The centrifugal deodorizing fan made of stainless steel is selected in the technical design, and the fan is suitable for conveying corrosive gas with high moisture content and acidity and alkalinity. Under the normal condition, the working noise of the centrifugal fan is lower than 85 DEG
dB (A), the design makes the vibration isolation and noise control efficiency more than 80 by setting control measures such as a base vibration isolation pad and the like
%. The noise of the normal operation of the complete device is lower than 70dB. The air intake valve can adjust the air suction quantity between 45% and 100% when the fan runs normally. In addition, no gas leakage exists at the through position of the shaft of the centrifugal fan and the shell.
The project is an integral deodorization technical process system of a livestock and poultry breeding plant, utilizes a biological deodorization integrated device, comprises a deodorization tower main body, a spraying system, an air distribution system and a drainage system in the process, further comprises a dosing system, a biological filter and the like, and has the advantages of no secondary pollution, stable operation and high treatment speed.
Drawings
FIG. 1 is a schematic view of the deodorization technique of livestock and poultry breeding factory.
Wherein, 2 is the fan, 6 is the collection system, 9 is the biological deodorization tower main part, 17 is spraying system, 26 is the biological packing layer, 30 is the medicine system, 41 is the gas distribution system, 48 is drainage system, 53 is water collecting system, 58 is the biological filter.
Detailed Description
In order to facilitate understanding of the present invention, the deodorizing technology for livestock and poultry farming plants according to the present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 shows a schematic view of a deodorization technique process system of a livestock and poultry farm according to the present invention, comprising sequentially connected:
(1) Fan, collection system: the deodorization fan is a power source for normal operation of the whole deodorization system, and odor stably and uniformly enters the biological tower deodorization device through the collection system under the pressure provided by the fan.
(2) Deodorization tower, gas distribution system: the lower part of the deodorization tower is provided with a reticular air distribution grid plate at the height of about 1 meter away from the foundation, and an air distribution grid with thinner pores is laid on the reticular air distribution grid plate to meet the requirement of packing accumulation. The odor gas is fed from the bottom of the tower, passes through the gas distribution device, is in counter flow with the liquid, and continuously passes through the packing layer through the gap between the porous plate and the gas distribution grid.
(3) A spray tower: the spray liquid of the spray tower is sprayed onto the filler from the tower top through the distributor and flows down along the surface of the filler, and the gas phase and the liquid phase are in close contact on the surface of the filler. Firstly, dust particles in the gas are removed by spraying and washing so as to avoid influencing the deodorization effect of the rear-end deodorization equipment. On one hand, gaseous pollutants are transferred to a liquid-phase liquid film, so that conditions are created for degrading odor by microorganisms; on the other hand, the cleaning solution reacts with acidic odor containing hydrogen sulfide (H2S) to remove the acidic odor, and partial grease and solid pollutants in the aerosol can be removed. The water pump of the spraying system runs intermittently through the time controller. 1 liquid level controller is respectively arranged in the water storage tank, and the system can control the start and stop of the water pump through the liquid level in the water storage tank. The model of the spray pump is as follows: q =60m3/H, H =25m, p =7.5kw. The processing principle of the spray washing equipment is similar to that of the existing water mist mixed micro-bubble spraying equipment, the existing water mist mixed micro-bubble spraying equipment is directly adopted, and the alkali washing function is added. Therefore, the adopted deodorization process is 'water mist mixed micro-bubble injection equipment (alkali washing) + biological filter'.
(4) A biological filler layer: the deodorizing tower utilizes the adsorption characteristic of carbon to enrich H2S and organic matters in odor on the surface of the biochar combined filler, and shows high-efficiency purifying capacity through the comprehensive degradation and filtration effects of various microorganisms attached to the surface of the biochar combined filler. The odor treatment by using the biochar combined filler has the advantages of stable treatment effect, land occupation saving, high efficiency, impact load resistance, simple and convenient management, low running cost and suitability for treating odor with various concentrations.
(5) A dosing system: in order to maintain the activity of microorganisms inhabiting the biological filler, a mixed solution of potassium dihydrogen phosphate, urea and industrial glucose is periodically added to supplement nutrient elements such as nitrogen, phosphorus, potassium and the like required by the growth of the microorganisms, wherein the dosage concentration of the potassium dihydrogen phosphate and the urea is 50mg/L, and the dosage concentration of the glucose is 40mg/L. The nutrient is quantitatively added by a metering pump, the medicine adding flow is 200L/min, the flow is adjustable, and the nutrient is added along with the spraying and humidifying processes. The model of the metering pump is selected as follows: q =200L/min, H =1.2MPa, P =1.5kW. The volume of the matched medicine adding tank is 500L. The medicine adding process is not provided with a special medicine adding dilution water pump and a spray thrower, and the medicine is added by a mode that a medicine adding pipe is directly connected to a water outlet main pipe of the spray water pump. The dosing pipe is provided with an electromagnetic valve and a dosing pump which are in linkage control, and the dosing pipe is started and stopped simultaneously, and the diluted medicament is sprayed on the biological region filler through an atomization sprayer.
(6) A drainage system: after the spray water provided by the spray system contacts with the filler, the spray water enters the water collecting system under the action of gravity flow and is discharged to the biological filter system for further treatment.
(7) A biological filter: microorganisms in the biofilter are used for degrading small molecular substances, ammonia gas, hydrogen sulfide, methyl mercaptan, trimethylamine and organic acids which are conventional odor components, and the treated substances can be discharged after reaching the standard.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, it is intended that all such modifications and alterations be included within the scope of this invention as defined in the appended claims.
Claims (10)
1. The waste gas deodorization treatment method is characterized by comprising a fan (2), a collection system (6), a biological deodorization tower body (9), a spraying system (17), a biological filler layer (26), a dosing system (30), an air distribution system (41), a drainage system (48), a water collection system (53) and a biological filter (58) which are sequentially connected along the waste gas direction.
2. The waste gas deodorization treatment method as claimed in claim 1, wherein the fan (2) is a stainless steel centrifugal fan, the vibration isolation and noise control efficiency is higher than 80% by setting control measures such as a base vibration isolation pad (3), the noise of the complete set of equipment in normal operation is lower than 70dB, the air intake valve (4) adjusts the suction air quantity between 45% and 100% when the fan is in normal operation, and the odor enters the biological deodorization tower body (9) under the pressure provided by the fan through the collection system (6).
3. An exhaust gas deodorization treatment method as recited in claim 1, wherein said biological deodorization tower (9) is a totally enclosed structure and is provided with a manhole (11), an air inlet hole (12), an air outlet hole (13), etc.
4. The method of claim 1, wherein the biological deodorization tower (9) has a single tower wind capacity of 220000m3/h, a single tower footprint of 18m x 10m, and a residence time of 6s.
5. An exhaust gas deodorization processing method as claimed in claim 1, characterized in that said deodorization system spraying system (17) is partially composed of a spraying water pump (18), a spraying pipe system (19), an electromagnetic switch system (20), a metering detection system (21), a liquid level control system (22), an automatic water replenishing device (23), an atomization sprayer (24) and the like.
6. An exhaust gas deodorization method as recited in claim 1, wherein said water pump (18) of the spray system of the deodorization system spray system (17) is intermittently operated by a time controller (25), and 1 liquid level controller (22) is respectively disposed in the water storage tank, and the system can control the start and stop of the water pump by the liquid level in the water storage tank.
7. The waste gas deodorization treatment method as claimed in claim 1, wherein the bio-filler layer (26) is a bio-carbon combined filler having characteristics of high porosity, large effective area, good permeability of gas and water, and fast mass transfer rate.
8. The waste gas deodorization treatment method as claimed in claim 1, wherein the dosing system (30) uses a metering pump (32) to dose the nutrient, and the dosing is performed by directly connecting a dosing pipe (35) to a water outlet main pipe of the spray water pump (18). The dosing pipe is provided with an electromagnetic valve (36) and a dosing pump (37) which are in linkage control, and the dosing pipe is started and stopped simultaneously, and diluted medicament is sprayed on the biological region filler (26) through an atomization sprayer (24).
9. An exhaust gas deodorization treatment method as recited in claim 1, wherein said air distribution system (41) is provided with a net-shaped air distribution grid plate (43) at the lower end of the deodorization tower, and an air distribution grid (44) with fine pores is laid on the net-shaped air distribution grid plate to meet the packing requirement. The odor enters the filling area through the gap between the porous plate and the air distribution grid.
10. An exhaust gas deodorization treatment method as claimed in claim 1, wherein the drainage system (48) is formed by spraying water provided by the spraying system (17) to contact with the packing (26), and then entering the water collection system (50) under gravity flow to be integrated into the biological filter (58) for sewage treatment.
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| CN202210912102.5A CN115228283A (en) | 2022-07-29 | 2022-07-29 | Waste gas deodorization treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116531936A (en) * | 2022-12-31 | 2023-08-04 | 濮阳龙丰纸业有限公司 | Method for purifying waste gas generated by pulping waste water by biological method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854355A (en) * | 2018-08-28 | 2018-11-23 | 湖北君集水处理有限公司 | A kind of system and method for sewage treatment plant's foul smell Collecting and dealing |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854355A (en) * | 2018-08-28 | 2018-11-23 | 湖北君集水处理有限公司 | A kind of system and method for sewage treatment plant's foul smell Collecting and dealing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116531936A (en) * | 2022-12-31 | 2023-08-04 | 濮阳龙丰纸业有限公司 | Method for purifying waste gas generated by pulping waste water by biological method |
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Application publication date: 20221025 |