CN113634104A - Treatment process of waste gas generated in kitchen waste treatment process - Google Patents
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- CN113634104A CN113634104A CN202110984045.7A CN202110984045A CN113634104A CN 113634104 A CN113634104 A CN 113634104A CN 202110984045 A CN202110984045 A CN 202110984045A CN 113634104 A CN113634104 A CN 113634104A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/34—Chemical or biological purification of waste gases
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- 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
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- B01D2259/818—Employing electrical discharges or the generation of a plasma
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- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
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Abstract
The invention discloses a treatment process of waste gas generated in a kitchen waste treatment process, which relates to the technical field of kitchen waste treatment and comprises the following process steps carried out in sequence: waste gas collection, heat recovery, dust recovery, washing and dedusting, chemical washing, low-temperature plasma deodorization and photocatalysis, biological purification, dehumidification, monitoring and discharge. The heat value recovery and the dust recovery of the waste gas are realized, the waste gas generated when the biochemical treatment machine treats the kitchen waste can reach the national emission standard, the waste gas can be effectively discharged after reaching the standard, and the treatment effect is better; when the standard emission is achieved, the heat value in the waste gas is recycled, the control effect is good, the resources (dust) in the waste gas are recycled, the resource utilization rate is increased, and the workload of the follow-up procedures in the peculiar smell removal process is reduced.
Description
Technical Field
The invention relates to the technical field of kitchen waste treatment, in particular to a treatment process of waste gas generated in a kitchen waste treatment process.
Background
The kitchen waste has the characteristics of high water content, high salt content, more organic components, easiness in putrefaction, less harmful components and the like, various odor pollutants are inevitably released in the collection, transportation and treatment processes, most of the odor pollutants can be sensed by people at a trace level, and if effective measures are not taken for control, the odor pollution is caused to the surrounding environment, so that the living environment and the body health of people are influenced.
A large amount of malodorous gases (such as ammonia gas, hydrogen sulfide, thiols and a series of inorganic matters and organic matters) are generated in the kitchen waste treatment process, and if the malodorous gases are directly discharged, the malodorous gases can cause serious pollution to the atmospheric environment.
Main treatment technology of waste gas in the current kitchen waste treatment process: biological methods, combustion methods, oxidation methods, absorption methods, adsorption methods, neutralization methods, low-temperature plasma methods, and the like. The biological method is to utilize microorganisms to degrade malodorous substances to deodorize gas, has high removal efficiency, simple disposal device, low treatment cost and easy operation and maintenance, and can avoid secondary pollution; the combustion method is to degrade combustible malodorous substances through strong oxidation reaction, has high decomposition efficiency, but has easy corrosion of equipment, fuel consumption and high cost, and can generate secondary pollutants in the treatment process; the oxidation method is to oxidize the malodorous substances by using an oxidant, and has high treatment efficiency, but needs the oxidant and has high treatment cost; the absorption method is to use solvent to absorb the malodorous substances in the odor to deodorize the gas, the treatment flow is large, the process is mature, the treatment efficiency is low, the absorbent is consumed, and the pollutants are only transferred from gas phase to liquid phase; the adsorption method is to remove the malodorous substances in the malodorous gas by utilizing the adsorption of an adsorbent, can treat the multi-component malodorous gas, and has high treatment efficiency, but the adsorbent is expensive, and the odor to be treated needs to have lower humidity and dust content; the neutralization method is to use a neutralization deodorizer to weaken the sensory intensity of the odor, can quickly eliminate the influence of the odor, has high flexibility, but the odor substances are not removed, and needs to be added with a neutralizing agent; the low-temperature plasma method is characterized in that active particles such as high-energy electrons and free radicals are utilized to react with pollutants in waste gas to deodorize the gas, the occupied area is small, the electron energy is high, the active particles can almost react with all malodorous gas molecules, the operation cost is low, the reaction is fast, the reaction is very fast to stop, and the active particles can be started at any time.
The effect of above-mentioned several kinds of processing techniques is "deodorization", and single technique all can't accomplish effective processing to the waste gas that produces among the kitchen garbage treatment process, and the function is single, needs the combination of multiple technique can really accomplish emission up to standard after the waste gas treatment. There is a need for a comprehensive treatment method, which can deodorize, eliminate or utilize other gases, solids or energy in the waste gas, and finally achieve the purpose of standard discharge.
Disclosure of Invention
Therefore, the invention provides a treatment process of waste gas generated in the kitchen waste treatment process, so as to solve the technical problem.
In order to achieve the above purpose, the invention provides the following technical scheme:
a treatment process of waste gas generated in a kitchen waste treatment process comprises the following steps:
collecting waste gas generated when the kitchen waste biochemical treatment machine treats the kitchen waste;
recovering heat from the collected exhaust gas;
recovering dust from the exhaust gas after heat recovery;
washing and dedusting the waste gas after dust recovery;
carrying out chemical washing on the waste gas subjected to washing and dust removal;
performing low-temperature plasma deodorization and photocatalysis on the chemically washed waste gas;
performing biological purification on the waste gas subjected to low-temperature plasma deodorization and photocatalytic treatment;
dehumidifying the waste gas after biological purification treatment;
discharging up to the standard and monitoring on line in real time.
Further, the recovering heat from the collected exhaust gas includes: the collected waste gas is subjected to heat recovery by using a heat exchanger, so that the temperature of the waste gas is reduced; the temperature of the steam in the waste gas discharged after the steam is condensed by the heat exchanger is 50 ℃.
Further, the recovering dust of the exhaust gas after recovering heat includes: and (4) carrying out dust recovery on the waste gas with the recovered heat by using a bag-type dust remover.
Further, the washing and dedusting of the waste gas after dust recovery comprises: and (3) carrying out dust removal treatment on the waste gas with the recovered dust by using a washing device to remove residual trace dust in the waste gas.
Further, the chemically scrubbing the exhaust gas after scrubbing and dedusting comprises: and (4) sending the waste gas subjected to washing and dedusting treatment to a chemical washing tower, and carrying out alkaline washing in the chemical washing tower by using NaOH to remove ammonia and the like in the waste gas.
Further, the performing low-temperature plasma deodorization and photocatalysis on the chemically washed exhaust gas comprises: and (3) conveying the waste gas subjected to chemical washing treatment to low-temperature plasma and photocatalytic equipment, and removing most hydrocarbon odor organic matters in the waste gas in the low-temperature plasma and photocatalytic equipment.
Further, the biological purification of the exhaust gas after the low-temperature plasma deodorization and photocatalytic treatment comprises: the waste gas after the photocatalysis treatment enters a biological purification tower, and the filler in the biological purification tower adopts volcanic rock and bamboo charcoal combined filler which is attached by organisms to grow into a film and provides a good carrier, so that microorganisms and trace malodorous molecules in the waste gas are removed.
Further, the dehumidifying the exhaust gas after the biological purification treatment includes: and (3) the waste gas after biological purification treatment is subjected to high-efficiency dehydration and dehumidification layer treatment to remove the moisture in the waste gas to below 85%.
Further, the standard emission and real-time online monitoring comprises: and (4) carrying out on-line detection and real-time data feedback on the waste gas reaching the standard, and leading the waste gas to be discharged at the height of 15m through a chimney.
The invention has the following advantages:
according to the treatment process of the waste gas generated in the kitchen waste treatment process, the heat value recovery and the dust recovery of the waste gas are realized, the waste gas generated in the process of treating the kitchen waste by using the biochemical treatment machine can reach the national emission standard, the standard emission is effectively achieved, and the treatment effect is good; when the standard emission is achieved, the heat value in the waste gas is recycled, the control effect is good, the resources (dust) in the waste gas are recycled, the resource utilization rate is increased, and the workload of the follow-up procedures in the peculiar smell removal process is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.
Fig. 1 is a flow chart of a treatment process of waste gas generated in a kitchen waste treatment process according to an embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
In order to solve the defects in the prior art, the embodiment provides a treatment process of waste gas generated in the kitchen waste treatment process, and adopts a comprehensive pollution prevention and treatment technical route of emission reduction plus treatment in the pollution prevention and treatment of the waste gas generated in the kitchen waste treatment process by using a biochemical treatment machine according to the waste gas emission standard and requirement. The gas collection and exhaust system is arranged at the air outlet (waste gas port and waste gas port) of the biochemical treatment machine, so that the collection, treatment and discharge of the waste gas of the biochemical treatment machine are realized, and the waste gas is discharged after reaching the standard after being treated by combining physical, chemical and biological technologies.
The treatment process of the waste gas generated in the kitchen waste treatment process provided by the embodiment comprises the following process steps which are sequentially carried out: waste gas collection, heat recovery, dust recovery, washing and dedusting, chemical washing, low-temperature plasma deodorization and photocatalysis, biological purification, dehumidification, monitoring and discharge.
As shown in fig. 1, the method comprises the following specific steps:
step S1, collecting waste gas generated when the kitchen waste biochemical treatment machine treats the kitchen waste, for example, an air exhaust pipeline or a smoke machine is arranged at an air outlet of the biochemical treatment machine.
Step S2, recovering heat from the exhaust gas collected in step S1. Specifically, a heat exchanger is used for recovering heat of the collected waste gas, so that the temperature of the waste gas is reduced; the temperature of the steam in the waste gas discharged after the steam is condensed by the heat exchanger is 50 ℃.
Step S3, recovering dust from the exhaust gas processed in step S2. Specifically, a bag-type dust collector is used for recovering dust from waste gas with recovered heat; the dust is recycled, the resource utilization rate is increased, and the workload of the subsequent process for removing the peculiar smell is reduced.
And step S4, washing and dedusting the waste gas processed in the step S3. Specifically, the washing device is used for carrying out dust removal treatment on the waste gas with the recovered dust, so as to remove residual trace dust in the waste gas.
Step S5, performing chemical scrubbing on the exhaust gas processed in step S4. Specifically, the waste gas after washing and dedusting treatment is sent to a chemical washing tower, and NaOH is used for alkali washing in the chemical washing tower to remove ammonia and the like in the waste gas.
Step S6, performing low temperature plasma deodorization and photocatalysis on the exhaust gas processed in step S5. Specifically, the waste gas after chemical washing treatment is sent to a low-temperature plasma and photocatalytic device, and most of hydrocarbon odor organic matters in the waste gas are removed in the low-temperature plasma and photocatalytic device.
Step S7, performing biological purification on the waste gas processed by the step S6. Specifically, the waste gas after photocatalytic treatment enters a biological purification tower, and the tower internal packing of the biological purification tower adopts volcanic rock and bamboo charcoal combined packing which is attached by organisms to grow into a film and provides a good carrier, so that microorganisms and trace malodorous molecules in the waste gas are removed.
And step S8, dehumidifying the exhaust gas processed in the step S7. Specifically, the waste gas after biological purification is treated by a high-efficiency dehydration and dehumidification layer to remove the moisture in the waste gas to below 85%.
And step S9, emission reaching the standard and real-time online monitoring. And (3) carrying out online detection and real-time data feedback on the treated waste gas reaching the standard, and leading the waste gas to be organically discharged at the height of 15m through a chimney.
According to the treatment process of the waste gas generated in the kitchen waste treatment process, the heat value recovery and the dust recovery of the waste gas are realized, the waste gas generated in the process of treating the kitchen waste by using the biochemical treatment machine can reach the national emission standard, the standard emission is effectively achieved, and the treatment effect is good; when the standard emission is achieved, the heat value in the waste gas is recycled, the control effect is good, the resources (dust) in the waste gas are recycled, the resource utilization rate is increased, and the workload of the follow-up procedures in the peculiar smell removal process is reduced. According to the exhaust emission standard and requirement, in the exhaust pollution prevention and control of the kitchen waste treated by the biochemical treatment machine, a comprehensive pollution prevention and control technical route of emission reduction and treatment is adopted, the working time of each procedure is strictly controlled in the operation process of the biochemical treatment machine, and the excessive concentration of pollutants in the exhaust is avoided.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A treatment process of waste gas generated in a kitchen waste treatment process is characterized by comprising the following steps:
collecting waste gas generated when the kitchen waste biochemical treatment machine treats the kitchen waste;
recovering heat from the collected exhaust gas;
recovering dust from the exhaust gas after heat recovery;
washing and dedusting the waste gas after dust recovery;
carrying out chemical washing on the waste gas subjected to washing and dust removal;
performing low-temperature plasma deodorization and photocatalysis on the chemically washed waste gas;
performing biological purification on the waste gas subjected to low-temperature plasma deodorization and photocatalytic treatment;
dehumidifying the waste gas after biological purification treatment;
discharging up to the standard and monitoring on line in real time.
2. The process for treating the waste gas generated in the kitchen waste treatment process according to claim 1, wherein the recovering heat of the collected waste gas comprises: the collected waste gas is subjected to heat recovery by using a heat exchanger, so that the temperature of the waste gas is reduced; the temperature of the steam in the waste gas discharged after the steam is condensed by the heat exchanger is 50 ℃.
3. The treatment process of the waste gas generated in the kitchen waste treatment process according to claim 1, wherein the recovery dust of the waste gas after heat recovery comprises: and (4) carrying out dust recovery on the waste gas with the recovered heat by using a bag-type dust remover.
4. The treatment process of the waste gas generated in the kitchen waste treatment process according to claim 1, wherein the washing and dedusting of the waste gas after dust recovery comprises: and (3) carrying out dust removal treatment on the waste gas with the recovered dust by using a washing device to remove residual trace dust in the waste gas.
5. The treatment process of the waste gas generated in the kitchen waste treatment process according to claim 1, wherein the chemical washing of the waste gas after washing and dedusting comprises: and (4) sending the waste gas subjected to washing and dedusting treatment to a chemical washing tower, and carrying out alkaline washing in the chemical washing tower by using NaOH to remove ammonia and the like in the waste gas.
6. The treatment process of the waste gas generated in the kitchen waste treatment process according to claim 1, wherein the step of performing low-temperature plasma deodorization and photocatalysis on the chemically washed waste gas comprises the steps of: and (3) conveying the waste gas subjected to chemical washing treatment to low-temperature plasma and photocatalytic equipment, and removing most hydrocarbon odor organic matters in the waste gas in the low-temperature plasma and photocatalytic equipment.
7. The treatment process of the waste gas generated in the kitchen waste treatment process according to claim 1, wherein the biological purification of the waste gas after the low-temperature plasma deodorization and photocatalytic treatment comprises: the waste gas after the photocatalysis treatment enters a biological purification tower, and the filler in the biological purification tower adopts volcanic rock and bamboo charcoal combined filler which is attached by organisms to grow into a film and provides a good carrier, so that microorganisms and trace malodorous molecules in the waste gas are removed.
8. The treatment process of the waste gas generated in the kitchen waste treatment process according to claim 1, wherein the step of dehumidifying the waste gas after the biological purification treatment comprises the steps of: and (3) the waste gas after biological purification treatment is subjected to high-efficiency dehydration and dehumidification layer treatment to remove the moisture in the waste gas to below 85%.
9. The process for treating waste gas generated in the kitchen waste treatment process according to claim 1, wherein said standard-reaching discharge and real-time on-line monitoring comprises: and (4) carrying out on-line detection and real-time data feedback on the waste gas reaching the standard, and leading the waste gas to be discharged at the height of 15m through a chimney.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115414770A (en) * | 2022-09-15 | 2022-12-02 | 杭州楚环科技股份有限公司 | Garbage waste gas treatment method |
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| CN101455938A (en) * | 2008-12-12 | 2009-06-17 | 上海惠罗环境工程有限公司 | Plasma biology deodorization technique and system of vent gas from steel-drum spray-painting production line |
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| CN103638761A (en) * | 2013-11-28 | 2014-03-19 | 江苏省环境科学研究院 | Method and device for removing malodorous gases by low-temperature plasma coupling catalytic oxidation |
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| CN110711470A (en) * | 2019-09-23 | 2020-01-21 | 浙江大维高新技术股份有限公司 | Desulfurization and denitrification purification process for incineration flue gas of biomass boiler |
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| CN115414770B (en) * | 2022-09-15 | 2023-12-01 | 杭州楚环科技股份有限公司 | Garbage waste gas treatment method |
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