CN107497288B - Process and equipment for treating odor of flue gas generated by drying biological fermentation fungus residues - Google Patents

Process and equipment for treating odor of flue gas generated by drying biological fermentation fungus residues Download PDF

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CN107497288B
CN107497288B CN201710599938.3A CN201710599938A CN107497288B CN 107497288 B CN107497288 B CN 107497288B CN 201710599938 A CN201710599938 A CN 201710599938A CN 107497288 B CN107497288 B CN 107497288B
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tower
biological
flue gas
smoke
circulating water
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CN107497288A (en
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黄贵虎
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Aerospace Kaitian Environmental Technology Co Ltd
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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
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/12—Washers with plural different washing sections
    • 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
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • 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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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
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  • Environmental & Geological Engineering (AREA)
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Abstract

A biological fermentation fungus dreg drying smoke odor treatment process and equipment, the method comprises a, subjecting smoke generated by drying biological fermentation fungus dreg to washing, cooling and dedusting processes, so that the outlet temperature of the treated smoke is not higher than 55 ℃, and the dust content in the smoke is not lower than 90%; b. the flue gas after dust removal and temperature reduction is processed by an oil removal process, so that the tar and dust content in the processed flue gas is less than 2mg/Nm3(ii) a c. The invention solves the problem of environmental pollution caused by odor of fungus residue drying smoke, can thoroughly solve the odor of the smoke, and the odor of the smoke is lower than the emission standard, thereby reaching the environmental-friendly emission standard and avoiding causing troubles to residents.

Description

Process and equipment for treating odor of flue gas generated by drying biological fermentation fungus residues
Technical Field
The invention relates to the technical field of environmental protection, in particular to a process and equipment for treating odor of flue gas generated by drying biological fermentation fungus residues.
Background
The biological fermentation industry including the industrial production of biological pharmacy such as antibiotics, amino acid and the like produces a large amount of biological fungi residues, the fungi residues are composed of hypha and precursors of biological fermentation substances, the water content is over 80 percent, the fungi residues are usually removed from the fungi residues through a dryer by utilizing hot air or steam in the industry, and the drying temperature is 140 DEG C0About C, some reach 6000And C, volatile organic compounds in the fungus residues are brought out along with hot air, the fungus residues have strong pungent smell, large fermentation enterprises have large yield and large fungus residues, the smoke generation amount is large, and strong odor pollutes the surrounding range of 10-20 kilometers. The problem is not completely solved by a mature process in the industry at present.
Disclosure of Invention
The invention solves the defects of the prior art and provides a process and equipment for treating odor of fungus dreg drying smoke, which solve the problem of environmental pollution caused by the odor of fungus dreg drying smoke, achieve the environmental emission standard and avoid the trouble of residents.
A process for treating odor of flue gas generated by drying biological fermentation fungus residues comprises the following steps:
a. flue gas generated by drying biological fermentation fungus residues is subjected to a washing, cooling and dedusting process, so that the outlet temperature of the treated flue gas is not higher than 55 DEG C0C, removing dust in the flue gas by not less than 90%;
b. performing oil removal on the dedusted and cooled flue gas to ensure that the tar and dust content in the treated flue gas is less than 2 mg/Nm;
c. and (4) removing peculiar smell of the deoiled smoke through a biological filter tower.
In the step b, a microbubble washing process is adopted for the oil removal process, and the microbubble washing process comprises the following specific steps: air and water are mixed by the gas-liquid two-phase flow pump and are introduced into the micro-bubble releaser, the impeller of the gas-liquid two-phase flow pump runs at a high speed to cut, the air is dispersed into micro-bubbles with the size of 30nm, the water containing the nano-scale micro-bubbles is sprayed on the flue gas by the circulating water pump after the micro-bubble releaser is mixed with the water in the circulating water tank, dust and tar in the flue gas are pasted on the micro-bubbles and float upwards in the circulating water tank, so that the separation of pollutants such as the dust and the tar from washing water is realized, and the washing. And the smoke entering the dehydration tower is discharged after water drops in the smoke are removed by a wire mesh demister.
And c, removing peculiar smell through a biological filter tower, and specifically comprising the following steps: taking 10 kg of sludge from a sewage station of a fermentation plant for producing the biological fermentation fungus residues, taking 5 kg of dried biological fermentation fungus residues to be treated, 0.1 kg of urea and 0.5 kg of monopotassium phosphate, putting the biological fermentation fungus residues, the urea and the monopotassium phosphate into a 100L barrel, adding 70L of water, fully and uniformly stirring the mixture until the volume is more than 20L0C, standing for 5-8 days at the temperature, stirring for 1-2 times every day, then adding 500 kg of water, sprinkling on the biological filler layer to allow the biological filler layer to fully adsorb water containing bacterial liquid, standing for 5-8 days, filling the biological filler layer into a biological filter tower, and filtering the deoiled flue gas through the biological filler layer.
The biological filler layer is a microporous ceramic particle layer.
The utility model provides a biological fermentation fungus sediment stoving flue gas stink treatment equipment, according to above-mentioned treatment technology, including the dust removal cooling tower, microbubble scrubbing tower and the biofiltration tower that connect gradually, be equipped with multistage biological filter chamber in the biofiltration tower, the inlet channel of biological filter chamber sets up at the middle part, and outlet channel sets up the upper and lower both sides at inlet channel, all separate through the bio-packing layer between inlet channel and the upper and lower outlet channel, and adjacent biological filter chamber passes through middle part inlet channel intercommunication.
And a third spraying device is arranged on the biological filler layer of each stage of biological filter chamber, the third spraying device is arranged on the air outlet channel, and a spray head of the third spraying device faces the biological filler layer.
Microbubble scrubbing tower is including dehydration tower, circulating water pond, gas-liquid diphasic flow pump, microbubble releaser and spray the pipeline, the dehydration tower intercommunication of tuber pipe and microbubble scrubbing tower is passed through to the dust removal cooling tower, be equipped with second spray set in the tuber pipe, second spray set passes through third circulating water pump and is connected with the circulating water pond, the circulating water pond is through UNICOM's siphunculus and dehydration tower bottom intercommunication, be equipped with a plurality of microbubble releasers in the circulating water pond, the water inlet and the circulating water pond intercommunication of gas-liquid diphasic flow pump, delivery port and microbubble releaser intercommunication, the top of dehydration tower is equipped with exhanst gas outlet and biological filtration tower intercommunication.
The dust removal cooling tower is equipped with packing layer and first spraying equipment between air intake and air outlet, first spraying equipment sets up between the air outlet of packing layer and dust removal cooling tower, the bottom of dust removal cooling tower is equipped with first circulating water pump and is connected with first spraying equipment, the bottom of dust removal cooling tower is equipped with the heat exchanger, the heat exchanger passes through pipeline and second circulating water pump and is connected with the cooling tower.
The thickness of the biological filler layer is 60 cm.
By adopting the method and the structure, the flue gas is cooled, dedusted and deoiled by the dedusting and cooling tower and the micro-bubble washing tower, so that a foundation is laid for deodorization of the biological filter tower, the proper temperature of the flue gas entering the biological filter tower is ensured, meanwhile, dust and tar are prevented from blocking the biological filter tower, the micro-bubble washing tower sprays water containing nano-scale micro-bubbles to wash the flue gas, oil and dust in the flue gas are adhered to the micro-bubbles and float on the water surface, separation of the dust, the oil and the water from the water is realized, the cleanness of circulating water is ensured, the biological filter tower adsorbs malodorous pollutants in the flue gas by using microorganisms in equipment and decomposes the malodorous pollutants into substances such as water, carbon dioxide and the like, the malodorous pollutants are eliminated, the environmental-friendly emission standard is reached, and the complaint problem caused by the malodorous pollution is avoided, the occupied area is saved by 50 percent compared with a single-layer biological filter, The invention has the advantages of high efficiency, solving the problem of environmental pollution caused by the odor of fungus residue drying smoke, thoroughly solving the odor of the smoke, ensuring that the odor of the smoke is lower than the emission standard, reaching the environmental-friendly emission standard and avoiding causing troubles to residents.
Drawings
FIG. 1 is a flow chart of the process of the present invention.
FIG. 2 is a schematic view of the structure of the apparatus of the present invention.
FIG. 3 is a schematic structural diagram of the dedusting and cooling tower of the present invention.
Fig. 4 is a schematic diagram of a microbubble washing tower according to the present invention.
FIG. 5 is a schematic structural view of a biofiltration tower according to the present invention.
In the attached figure, the device comprises a washing cooling tower 1, a washing cooling tower 2, a first spraying device 3, a packing layer 4, a first circulating water pump 5, a heat exchanger 6, a second circulating water pump 7, a cooling tower 8, a dehydration tower 9, a gas-liquid two-phase flow pump 10, a micro-bubble releaser 11, a circulating water tank 12, a third circulating water pump 13, a second spraying device 14, a biological filtration tower 15, a biological filtration tower filler 16, a third spraying device 17 and a fourth circulating water pump.
Detailed Description
The following describes an embodiment of the present invention with reference to the drawings.
As shown in figures 1 to 5, the invention is completed by three sections, namely three sets of main equipment and accessory equipment thereof form a complete system equipment, and the aim of solving the odor of the smoke is achieved. They are dust-removing cooling tower and its auxiliary equipment, micro bubble washing tower and its auxiliary equipment, biological filtering tower and its auxiliary equipment. Wherein the dust removal cooling tower 1 and the microbubble washing tower are used for cooling, removing dust and removing oil, so that a foundation is laid for the deodorization of the biological filter tower 14, the proper temperature is ensured, and meanwhile, the biological filter tower 14 is prevented from being blocked by dust and tar.
Dust removal cooling tower 1: the dust removal cooling tower 1 is equipped with packing layer 3 and first spraying equipment 2 between air intake and air outlet, first spraying equipment 2 sets up between the air outlet of packing layer 3 and dust removal cooling tower 1, the bottom of dust removal cooling tower 1 is equipped with first circulating water pump 4 and is connected with first spraying equipment 2, the bottom of dust removal cooling tower 1 is equipped with heat exchanger 5, heat exchanger 5 passes through the pipeline and is connected with cooling tower 7 with second circulating water pump 6.
The high temperature flue gas from the drying oven has a high temperature (100 deg.C)0C) The dust content is high, and the dust contains tar and has viscosity, so the flue gas firstly enters a washing tower to primarily remove the dust and oil, and simultaneously the flue gas is cooled to 55 DEG0And C is about.
In order to reduce the consumption of washing water and prolong the circulation time of the washing water, a heat exchanger 5 is arranged in a circulating water pool at the bottom of a washing cooling tower 1, the washing water is cooled by the heat exchanger 5, and the temperature of the washing water is kept to be not higher than 40 DEG0C. The cooling medium of the heat exchanger 5 adopts tap water, and is cooled by the cooling tower 7 to realize closed cycle.
The design target of the washing cooling tower 1 is as follows: intake air temperature 800C, outlet temperature 550And C, removing 90% of dust, and controlling the replacement period of circulating water and the amount and temperature of cooling water. The specific design parameters in this example are as follows:
empty tower gas velocity: 1.6-2 m/s;
liquid-gas ratio: 2-3L/m for carrying out heavy planting;
residence time in the flue gas tower: the time is more than or equal to 1 s;
the parameters can be set according to the temperature and the dust concentration of the inlet flue gas, the liquid-gas ratio can be increased or decreased, if the flue gas dust content is high, the gas-liquid ratio can be properly increased, and the retention time in the flue gas tower can be prolonged. If the temperature is high, the flow rate of the cooling water can be increased.
Micro-bubble washing tower: microbubble scrubbing tower is including dehydration tower 8, circulating water pond 11, gas-liquid diphasic flow pump 9, microbubble releaser 10 and spray line, dust removal cooling tower 1 is through the dehydration tower 8 intercommunication of tuber pipe with the microbubble scrubbing tower, be equipped with second spray set 13 in the tuber pipe, second spray set 13 passes through third circulating water pump 12 and is connected with circulating water pond 11, circulating water pond 11 is through UNICOM's pipe and dehydration tower 8 bottom intercommunication, be equipped with a plurality of microbubble releasers 10 in the circulating water pond 11, gas-liquid diphasic flow pump 9's water inlet and circulating water pond 11 intercommunication, delivery port and microbubble releaser 10 intercommunication, the top of dehydration tower 8 is equipped with exhanst gas outlet and biological filtration tower 14 intercommunication.
The flue gas at the outlet of the washing cooling tower 1 contains dust and tar and needs to be further removed. Utilize microbubble releaser 10 in the circulating water pond 11 of microbubble scrubbing tower to make the mixed oil nanometer microbubble in the water in the circulating water pond 11, then through third circulating water pump 12 and second spray equipment 13 with the microbubble water pump in the tuber pipe, utilize the diffusion of shower nozzle fully with the flue gas contact, wash the flue gas, oil and dust adhere on the microbubble in the flue gas, fall into dehydration tower 8 in, float in the surface of water, realize dust and oil and separation of water, guarantee that the circulating water is clean. The dehydration tower 8 enters a circulating water tank 11 through a communicating pipe, and a wire mesh demister is arranged at the outlet of the dehydration tower 8 to remove water drops in the flue gas. The gas-liquid two-phase flow pump 9 mixes air and water, an impeller of the gas-liquid two-phase flow pump 9 rotates at a high speed to cut, the air is dispersed into micro bubbles of about 30nm, the micro bubble releaser 10 is mixed with water in the circulating water pool 11, and oil and dust in the circulating water are stuck on the micro bubbles and float on the water surface along with the micro bubbles. The oil and dust are separated from the circulating water by means of an oil decanter.
Specific design parameters are as follows:
the empty flow rate of the dehydration tower is as follows: 2 m/s;
gas-liquid two-phase flow pump: carrying out downward cultivation at a flow rate of 1.5 m/h, a lift of 45 m and a power of 1.5 KW;
liquid-gas ratio: performing thin film fruit and thin film fruit thinning at a ratio of 0.5-1L/m;
flue gas flow rate: 6-8 m/s;
the gas-liquid two-phase flow pump is a micro-bubble generator, the smaller and more micro-bubbles are, the stronger the dust and tar removal effect in the flue gas is, and the gas-liquid two-phase flow pump with a proper model is required to be selected according to the dust concentration and tar content in the flue gas during design.
Biological filtration tower 14: the smoke from which the dust and the oil are removed enters a biological filter tower, and the odor pollutants in the smoke are adsorbed by the microorganisms in the equipment and decomposed into substances such as water, carbon dioxide and the like, so that the odor is eliminated, the environmental-friendly emission standard is achieved, and the complaint problem caused by the odor pollution is avoided. The biological filtration tower 14 is divided into two stages of biological filtration, including primary biological filtration and secondary biological filtration. The air inlet channel of the biological filter tower 14 is arranged in the middle, the air outlet channels are arranged on the upper side and the lower side of the air inlet channel, the upper air outlet channel and the lower air outlet channel are separated by a biological filler layer 15, and the adjacent biological filter chambers are communicated through the air inlet channel in the middle. And a biological filler layer of each stage of biological filter chamber is provided with a third spraying device 16, the third spraying device 16 is arranged on the air outlet channel and supplies water through a fourth circulating water pump 17, and a spray head of the third spraying device faces the biological filler layer 15.
Preparing a biological filler layer: according to the characteristics of strong corrosivity caused by the fact that the smoke contains organic acids such as amino acid and the like, the biological filter adopts a special microorganism particle filler, such as a microporous ceramsite filler. The thickness of the biological stuffing layer is 60 CM. The microporous ceramsite filler is formed by sintering clay, a pore-forming agent and trace elements such as iron, copper, zinc and the like required by microorganisms at high temperature, has the characteristics of corrosion resistance and capability of providing the trace elements required by the microorganisms.
Specific design parameters are as follows:
the empty flow rate of the biological filter tower is as follows: 0.1m/s
Internal residence time of filler: 6S
The strain culture method comprises the following steps: the pollutant components in the waste gas are complex and unknown, the selection of the strains is difficult, and the fuzzy culture method is adopted in the invention.
Taking sludge of a sewage station of a fermentation factory as a bacteria source, taking dried bacteria residues as a culture medium, and adding potassium dihydrogen phosphate, glucose and urea for culture.
The specific method comprises the following steps: taking 10 kg of sludge from a sewage station of a fermentation plant, taking 5 kg of dried mushroom dregs, 0.1 kg of urea and 0.5 kg of monopotassium phosphate, putting the mixture into a 100L barrel, adding 70L of water, and fully and uniformly stirring. Standing at a temperature of more than 20 deg.C for about 7 days, and stirring for 1-2 times per day.
After 7 days, adding 500 kg of water, sprinkling on the microporous ceramsite, adsorbing the water containing the bacterial liquid by the ceramsite, standing for about 7 days, and then loading into a biological filter tower.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A technology for treating odor of drying smoke of biological fermentation fungus residues is characterized by comprising the following steps: the method comprises the following steps:
a. flue gas generated by drying biological fermentation fungus residues is subjected to a washing, cooling and dedusting process, so that the outlet temperature of the treated flue gas is not higher than 55 DEG C0C, removing dust in the flue gas by not less than 90%;
b. the flue gas after dust removal and temperature reduction is processed through an oil removal process, so that the tar and dust content in the processed flue gas are less than 2mg/Nm, the oil removal process adopts a microbubble washing process, and the microbubble washing process comprises the following specific steps: mixing air and water by using a gas-liquid two-phase flow pump, introducing the air and the water into a micro-bubble releaser, cutting the air into micro-bubbles with the size of 30nm by high-speed operation of an impeller of the gas-liquid two-phase flow pump, spraying the water containing nano-scale micro-bubbles on flue gas by using a circulating water pump after the micro-bubble releaser is mixed with the water in a circulating water tank, and discharging the flue gas entering a dehydration tower after water drops in the flue gas are removed by using a wire mesh demister;
c. and (4) removing peculiar smell of the deoiled smoke through a biological filter tower.
2. The odor treatment process of the biological fermentation mushroom dreg drying smoke according to the claim 1, is characterized in that: and c, removing peculiar smell through a biological filter tower, and specifically comprising the following steps: taking 10 kg of sludge from a sewage station of a fermentation plant for producing the biological fermentation fungus residues, taking 5 kg of dried biological fermentation fungus residues to be treated, 0.1 kg of urea and 0.5 kg of monopotassium phosphate, putting the biological fermentation fungus residues into a 100L barrel, adding 70L of water, fully and uniformly stirring the mixture in a large scaleAt 200C, standing for 5-8 days at the temperature, stirring for 1-2 times every day, then adding 500 kg of water, sprinkling on the biological filler layer to allow the biological filler layer to fully adsorb water containing bacterial liquid, standing for 5-8 days, filling the biological filler layer into a biological filter tower, and filtering the deoiled flue gas through the biological filler layer.
3. The odor treatment process of the biological fermentation mushroom dreg drying smoke according to claim 2, is characterized in that: the biological filler layer is a microporous ceramic particle layer.
4. A treatment device for odor of smoke generated by drying biological fermentation fungus residues, which is the treatment process according to one of claims 1 to 3, and is characterized in that: including dust removal cooling tower, microbubble scrubbing tower and the biofiltration tower that connects gradually, be equipped with multistage biofiltration room in the biofiltration tower, the inlet channel of biofiltration room sets up in the middle part, and outlet channel sets up in inlet channel's upper and lower both sides, all separate through the bio-packing layer between inlet channel and the upper and lower outlet channel, adjacent biofiltration room passes through middle part inlet channel intercommunication.
5. The biological fermentation mushroom residue drying smoke odor treatment equipment according to claim 4, characterized in that: and a third spraying device is arranged on the biological filler layer of each stage of biological filter chamber, the third spraying device is arranged on the air outlet channel, and a spray head of the third spraying device faces the biological filler layer.
6. The biological fermentation mushroom residue drying smoke odor treatment device according to claim 5, characterized in that: microbubble scrubbing tower is including dehydration tower, circulating water pond, gas-liquid diphasic flow pump, microbubble releaser and spray the pipeline, the dehydration tower intercommunication of tuber pipe and microbubble scrubbing tower is passed through to the dust removal cooling tower, be equipped with second spray set in the tuber pipe, second spray set passes through third circulating water pump and is connected with the circulating water pond, the circulating water pond is through UNICOM's siphunculus and dehydration tower bottom intercommunication, be equipped with a plurality of microbubble releasers in the circulating water pond, the water inlet and the circulating water pond intercommunication of gas-liquid diphasic flow pump, delivery port and microbubble releaser intercommunication, the top of dehydration tower is equipped with exhanst gas outlet and biological filtration tower intercommunication.
7. The biological fermentation mushroom residue drying smoke odor treatment device according to claim 6, characterized in that: the dust removal cooling tower is equipped with packing layer and first spraying equipment between air intake and air outlet, first spraying equipment sets up between the air outlet of packing layer and dust removal cooling tower, the bottom of dust removal cooling tower is equipped with first circulating water pump and is connected with first spraying equipment, the bottom of dust removal cooling tower is equipped with the heat exchanger, the heat exchanger passes through pipeline and second circulating water pump and is connected with the cooling tower.
8. The biological fermentation mushroom residue drying smoke odor treatment device according to one of claims 5 to 7, wherein: the thickness of the biological filler layer is 60 cm.
CN201710599938.3A 2017-07-21 2017-07-21 Process and equipment for treating odor of flue gas generated by drying biological fermentation fungus residues Active CN107497288B (en)

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CN111773899B (en) * 2020-07-06 2022-03-08 山东康源环保科技有限公司 Useless trade of danger is handled VOCs combination processing apparatus
CN112521200B (en) * 2020-12-10 2023-05-30 广州中嘉装备科技有限公司 A stoving fermenting installation for fertilizer

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