CN111408601A - Kitchen waste resource utilization method and treatment system - Google Patents
Kitchen waste resource utilization method and treatment system Download PDFInfo
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- CN111408601A CN111408601A CN201911371932.6A CN201911371932A CN111408601A CN 111408601 A CN111408601 A CN 111408601A CN 201911371932 A CN201911371932 A CN 201911371932A CN 111408601 A CN111408601 A CN 111408601A
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Images
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A resource utilization method of kitchen waste comprises the following steps: 1) carrying out hydraulic cleaning and preliminary separation on the kitchen waste; 2) separating out waste metal, waste plastic, bone, glass and ceramic from the separated slag; processing bones into bone powder, packaging and selling waste plastics, crushing, dehydrating and drying the residual food slag, and then carrying out dry distillation; 3) the separated liquid is further separated into biological grease, fine slag and sewage; storing biological grease, performing dry distillation on fine slag materials to convert the fine slag materials into biological carbon, and desulfurizing biogas generated after anaerobic treatment of sewage to serve as fuel of a dry distillation unit; 4) drying the biogas residues and then carrying out dry distillation; 5) condensing the dry distillation gas generated in the dry distillation process to separate out combustible gas as fuel of a dry distillation unit, and carrying out oil-water separation on the residual liquid to generate biomass oil and pyroligneous liquor. The invention also discloses a system for realizing the method.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a resource utilization method of kitchen waste.
The invention also relates to a processing system for implementing the method.
Background
Kitchen waste, commonly known as swill, is a domestic waste formed in the process of domestic consumption of residents, is extremely easy to rot and deteriorate, emits foul odor, and spreads bacteria and viruses.
The main components of the kitchen waste comprise food residues, vegetables, animal and vegetable oil, meat and bones and the like. Chemically, there are starch, cellulose, protein, lipid and inorganic salts. The kitchen waste is mainly characterized by rich organic matter content, high water content and easy decay, the properties and smell of the kitchen waste can cause bad influence on environmental sanitation, and harmful substances such as bacterial microorganisms, mycotoxin and the like can be easily grown.
Kitchen waste pollutes the environment, harms human health, spreads diseases, and the infiltration liquid generated during stacking in the kitchen waste enters a sewage treatment system, so that the content of organic matters is increased, the burden of a sewage treatment plant is increased, and the operation cost is increased.
The kitchen waste rich in nutrition is a precious renewable resource, but because the kitchen waste is not paid attention to, the kitchen waste is usually treated in a burying mode and the like, and the treatment method is improper, so that the kitchen waste becomes a potential hazard source influencing food safety and ecological safety.
At present, the main treatment methods of the kitchen waste include landfill, composting, incineration, crushing and direct discharge and the like. The landfill method has large floor area and generates CH4And leachate and other contaminants; long composting period and NH generation3Greenhouse gases and low fertilizer quality, so the popularization is difficult; the water content of the kitchen waste is high, and toxic dioxin gas can be generated when the kitchen waste and other domestic waste are incinerated; and direct crushing and discharging easily generate sewage and odor, and breed bacteria and mosquitoes and flies.
Most of kitchen waste treatment in the prior art adopts a mode of cutting, crushing and directly discharging to a sewer, so that environmental pollution is still caused and the burden of urban pipe network sewage treatment is increased, and therefore, a technology capable of treating kitchen waste on site and changing the kitchen waste into valuable is provided, the problems are well solved by a kitchen waste treatment device in the patent Z L201711199255.5, solid-liquid and oil-water separation technology is utilized to carry out solid-liquid and oil-water separation on the kitchen waste on site, solid kitchen waste is packaged and collected after solid-liquid separation, liquid after solid-liquid separation is subjected to oil-water separation, kitchen waste oil is extracted and collected to be supplied to a chemical plant as an industrial product raw material or to produce biodiesel for comprehensive utilization, and harmless waste water is directly discharged.
However, for the product of kitchen waste treated in some specific places or with different requirements for different components, the treatment mode of the prior art needs diversified innovative schemes, and the prior art, such as patent Z L201711199255.5, "a kitchen waste treatment device", belongs to a simple extrusion mode, which extrudes kitchen waste to realize solid-liquid separation, and packs, transports and utilizes the separated solid substance, and such treatment mode solves the problem of recycling of kitchen waste, but it is useless for some kitchen waste treatment substances which need to be cut and crushed to produce particles after the kitchen waste treatment, and the key of the problem is that the crushed and cut substances cannot be directly discharged, and the substances can be sufficiently and effectively recycled, so that a method and treatment equipment which can not only extrude the kitchen waste to maintain the physical and chemical properties of the solid substance in the solid-liquid mixture, but also can cut, crush and solidify the particles of the kitchen waste with special requirements and can realize the whole-block recycling are especially necessary to be researched
Disclosure of Invention
The invention aims to provide a resource utilization method of kitchen waste.
It is a further object of the invention to provide a processing system for carrying out the above method.
In order to achieve the purpose, the resource utilization method of the kitchen waste provided by the invention mainly comprises the following steps:
1) carrying out hydraulic cleaning and preliminary separation on the kitchen waste;
2) separating out waste metal, waste plastic, bone, glass and ceramic from the separated slag; processing bones into bone powder, packaging and selling waste plastics, crushing, dehydrating and drying the residual food slag, and then carrying out dry distillation;
3) the separated liquid is further separated into biological grease, fine slag and sewage; storing biological grease, performing dry distillation on fine slag materials to convert the fine slag materials into biological carbon, and desulfurizing biogas generated after anaerobic treatment of sewage to serve as fuel of a dry distillation unit;
4) drying the biogas residues and then carrying out dry distillation;
5) the combustible gas is condensed and separated from the dry distillation pyrolysis gas generated in the dry distillation process and is used as the fuel of a dry distillation unit, and the biomass oil and the pyroligneous liquor are separated from the rest liquid through oil-water separation.
The resource utilization method of the kitchen waste is characterized in that the slag in the step 2 is sorted by photoelectricity, eddy current and electromagnetism.
The resource utilization method of the kitchen waste is characterized in that the sewage separated in the step 3 is subjected to anaerobic treatment, aerobic treatment and adsorption treatment.
The method for recycling the kitchen waste comprises the step 4 of drying the biogas residues with the water content of 80% to the water content of below 30%.
The treatment system for realizing the resource utilization method of the kitchen waste comprises the following steps:
1) the kitchen waste pretreatment system comprises a pretreatment workshop provided with a high-rise material pouring platform, wherein after being transported to a treatment site by a vehicle for receiving and transporting kitchen waste, the kitchen waste is poured into a receiving hopper through the high-rise material pouring platform;
2) the rotary drum sieve is used for conveying the kitchen waste in the receiving hopper to perform hydraulic cleaning and primary separation;
3) the photoelectric, eddy current and electromagnetic sorting device is used for further sorting out waste metal, waste plastic, bone, glass and ceramic from the primarily separated slag;
4) the bone crusher is used for processing the bones separated by the photoelectric, eddy and electromagnetic sorting device into bone powder and packaging the bone powder;
5) the residue crusher, the dehydrator and the dryer are used for crushing, dehydrating and drying the food residues separated by the photoelectric, eddy and electromagnetic sorting device and then feeding the food residues into the dry distillation device;
6) the rotary drum sieve is connected with the rotary fine grid, the oil separation tank and the three-phase centrifuge, and the liquid screened by the rotary drum sieve is further separated into biological grease, pyroligneous liquor, fine slag and sewage; wherein, the biological oil and fat enter an oil storage tank for storage, the pyroligneous liquor is sent to a pyroligneous liquor tank for storage, and the fine slag material enters a dry distillation device after being dried;
7) the anaerobic water inlet tank and the anaerobic reactor are used for carrying out anaerobic treatment on the sewage generated in the whole process, and the biogas generated after the treatment is desulfurized and then is used as the fuel of the dry distillation unit;
8) the aerobic processor, the magnetic flocculation processor, the active coke filtering and adsorbing deep processor and the reverse osmosis processor are used for performing aerobic treatment, magnetic flocculation treatment, active coke filtering and adsorbing deep processing and reverse osmosis treatment on the diving water treated by the anaerobic reactor and then discharging the diving water after reaching the standard;
9) the intermediate bin, the conveying device and the dry distillation device are used for carrying out dry distillation on the dried biogas residues;
10) the charcoal bin is used for storing charcoal converted by dry distillation;
11) the destructive distillation pyrolysis gas treatment device is used for treating pyrolysis gas generated in the destructive distillation process of the kitchen waste through the condensate spraying tank and the gas treatment box, and recovering combustible gas and pyrolysis liquid in the pyrolysis gas, wherein the combustible gas is conveyed to the destructive distillation device to serve as fuel, and the pyrolysis liquid is conveyed to the pyrolysis liquid box;
the dry distillation pyrolysis gas treatment device comprises: the dry distillation device, pyrolysis liquid sprays the jar, the gas processing case, the safety water tank, the pyrolysis liquid case, the cooling circulation water tank, the draught fan, pyrolysis liquid sprays jar air inlet, the hole for hoist, the access hole, the cooling water pipe, pyrolysis liquid sprays the pipe, pyrolysis liquid sprays jar fluid-discharge tube, the cooling water outlet pipe, the cooling water inlet tube, gas processing case fluid-discharge tube, the box, pyrolysis liquid case import, pyrolysis liquid delivery pump, pyrolysis liquid overflow pipe, pyrolysis liquid sedimentation tank, cooling circulation water tank wet return, the cooling water circulating pump, the combustible gas export, let out the explosion mouth, the inspection opening, the overflow mouth, the blow off pipe, the moisturizing pipe, the safety water tank air inlet, the second connecting pipe, gas processing case let out the explosion mouth, gas processing case air inlet, first connecting pipe, pyrolysis liquid sprays the pipe air inlet, dry distillation device pyrolysis gas export and pyrolysis liquid sprays jar let out the explosion mouth.
In the treatment system, pyrolysis gas generated in the kitchen waste treatment process by the dry distillation device sequentially enters the pyrolysis liquid spraying tank and the gas treatment box under the action of the induced draft fan; after the pyrolysis gas is treated, the combustible gas is discharged from a combustible gas outlet of the gas treatment box; the pyrolysis liquid is conveyed to the pyrolysis liquid box through a liquid outlet of the pyrolysis liquid spraying tank and a liquid outlet pipe of the gas treatment box through pipelines; and the pyrolysis liquid in the pyrolysis liquid box is conveyed to a pyrolysis liquid spraying pipe of the pyrolysis liquid spraying tank through a pyrolysis liquid conveying pump.
The treatment system comprises a pyrolysis liquid spraying tank, a pyrolysis liquid spraying pipe, a pyrolysis liquid spraying tank air inlet, a pyrolysis liquid spraying tank air outlet, a pyrolysis liquid spraying tank liquid discharge pipe, an access hole and the like, wherein the pyrolysis liquid spraying tank comprises a tank body, the pyrolysis liquid spraying pipe, the pyrolysis liquid spraying tank air inlet, the pyrolysis liquid spraying tank air outlet, the pyrolysis liquid spraying tank liquid discharge pipe, the access hole and the like; pyrolysis gas firstly enters a pyrolysis liquid spraying tank through a pyrolysis liquid spraying tank air inlet from a pyrolysis liquid pyrolysis gas outlet of a dry distillation device, the pyrolysis gas is treated by the pyrolysis liquid spraying tank, the pyrolysis liquid is discharged from a pyrolysis liquid spraying tank liquid discharge pipe at the bottom of the pyrolysis liquid spraying tank and conveyed to a pyrolysis liquid box, and the pyrolysis gas is conveyed to a gas treatment box air inlet through a first connecting pipe from a pyrolysis liquid spraying tank air outlet at the top of the pyrolysis liquid spraying tank and enters a gas treatment box.
The treatment system is characterized in that the gas treatment box consists of a cooling water pipe, a gas inlet of the gas treatment box, a combustible gas outlet, an explosion venting port of the gas treatment box, a second connecting pipe, a cooling water outlet pipe, a cooling water inlet pipe, a liquid discharge pipe of the gas treatment box and an induced draft fan; the cooling water inlet pipe is connected with the cooling circulating water tank through a cooling water circulating pump; the cooling water pipe is connected with a cooling circulation water tank return pipe of the cooling circulation water tank through a cooling water outlet pipe; the explosion venting port of the gas treatment tank is connected with the gas inlet of the safety water tank through a second connecting pipe; combustible gas generated after the pyrolysis gas is treated by the gas treatment box is discharged through a combustible gas outlet at the upper part of the gas treatment box and is recycled as fuel; pyrolysis liquid generated after pyrolysis gas is treated by the gas treatment box is conveyed to the pyrolysis liquid box through a liquid discharge pipe of the gas treatment box at the lower part of the gas treatment box.
The treatment system comprises a safe water tank, a water inlet, an explosion venting port, a water replenishing pipe, an overflow port, a drain pipe and an inspection port, wherein the safe water tank consists of a tank body, a safe water tank air inlet, the explosion venting port, the water replenishing pipe, the overflow port, the drain pipe and the inspection port; the water level in the safety water tank is 85% of the height of the safety water tank, the air inlet pipe of the safety water tank is connected with the explosion venting port of the gas treatment tank and the explosion venting port of the pyrolysis liquid spraying tank through a second connecting pipe, the air inlet pipe of the safety water tank extends into water, and air is prevented from flowing into the gas treatment tank through a water seal; when the combustible gas in the pyrolysis liquid spraying tank or the gas treatment box is subjected to tempering and deflagration, the gas generated by deflagration enters the safety water tank through the deflagration opening of the pyrolysis liquid spraying tank or the deflagration opening of the gas treatment box through the second connecting pipe, and the water in the safety water tank is drained out through the deflagration opening of the safety water tank under the action of the instantaneous pressure of the gas; after the pressure generated by the deflagration gas is discharged out through the explosion discharge port of the safety water tank, the water level in the safety water tank is restored to the original water level through the water replenishing pipe by the safety water tank.
The invention is characterized in that:
1) the method can classify, decompose and utilize various substances in the kitchen waste to the maximum extent, and fully convert various substances in the kitchen waste into resources which can be reused. The kitchen waste is used as a raw material, and the following products are produced and recovered: bone meal, waste plastics, waste metals, biomass oil, pyrolysis liquid, biochar, methane and the like.
2. The selling of the renewable resource products can improve the economic benefits of enterprises, enable the enterprises to stably produce and operate, increase the tax of local governments and reduce the financial burden.
3) The treatment of the kitchen waste recycling is completed by utilizing various known devices in a mutual matching way without needing excessive special new devices.
Drawings
FIG. 1 is a schematic flow chart of resource utilization of kitchen waste.
FIG. 2 is a side view of the pyrolysis gas processing apparatus of the present invention.
FIG. 3 is a top view of the pyrolysis gas processing apparatus of the present invention.
Description of reference symbols in the drawings
1 a dry distillation device, 2 a pyrolysis liquid spraying tank, 3 a gas treatment tank, 4 a safe water tank, 5 a pyrolysis liquid tank, 6 a cooling circulation water tank, 7 an induced draft fan, 8 a pyrolysis liquid spraying tank air inlet, 9 a hoisting port, 10 an access hole, 11 a cooling water pipe, 12 a pyrolysis liquid spraying pipe, 13 a pyrolysis liquid spraying tank liquid discharge pipe, 14 a cooling water outlet pipe, 15 a cooling water inlet pipe, 16 a gas treatment tank liquid discharge pipe, 17 a box body, 18 a pyrolysis liquid tank inlet, 19 a pyrolysis liquid delivery pump, 20 a pyrolysis liquid overflow pipe, 21 a pyrolysis liquid sedimentation tank, 22 a cooling circulation water tank water return port, 23 a cooling water circulation pump, 24 a combustible gas outlet, 25 an explosion relief port, 26 an inspection port, 27 an overflow port, 28 a drain pipe, 29 a water replenishing pipe, 30 a safe water tank air inlet, 31 a second connecting pipe, 32 a gas treatment tank explosion relief port, 33 a gas treatment tank air inlet, 34 a first connecting pipe, and 35 a pyrolysis liquid, 36 pyrolysis gas outlet of the dry distillation device and 37 pyrolysis liquid spraying tank explosion venting port.
Detailed Description
The invention is further described above with reference to the accompanying drawings.
As shown in fig. 1, the main steps of the present invention are:
1) after being transported to a treatment site by a collection vehicle, the kitchen waste is dumped into a receiving hopper through a high-rise dumping platform of a pretreatment workshop;
2) conveying the kitchen waste in the receiving hopper to a subsequent rotary drum sieve for hydraulic cleaning and primary separation through shaftless spiral conveying equipment;
3) magnetic separation, eddy current separation and photoelectric separation are carried out on the separated slag to separate out waste metal, waste plastic, bone, glass, ceramic and the like; bone powder is processed by processing equipment such as crushing and the like, and is packaged and sold, waste plastic is packaged and sold by a packaging machine, glass ceramic and the like are processed into grass planting bricks, waste metal is separately recycled, and the rest food slag enters a dry distillation device after being crushed, dehydrated and dried;
4) the liquid screened by the rotary drum screen is further separated into biological grease, fine slag and sewage through a rotary fine grid, an oil separation tank and a three-phase centrifuge; the biological oil and fat enters an oil storage tank for storage, and the fine slag material enters a dry distillation device after being dried;
5) sewage generated in the whole treatment process enters an anaerobic reaction tank and an anaerobic reactor, and marsh gas generated after anaerobic treatment is desulfurized and then is used as fuel of a dry distillation unit;
6) after being treated by an anaerobic reactor, sewage is subjected to aerobic treatment, magnetic flocculation treatment, active coke filtration adsorption deep treatment and reverse osmosis treatment and then is discharged after reaching the standard;
7) after being dried, 80 percent of biogas residue is reduced to 30 percent of water content and enters a dry distillation device through an intermediate bin and a conveying device;
8) the slag materials separated from the kitchen waste and organic matters in the biogas residues are subjected to high-temperature carbonization in a carbonization unit and then converted into biochar, and the biochar is cooled by a cooling device and then conveyed to a biochar bin;
9) combustible gas is separated from the pyrolysis gas generated in the dry distillation process through a dry distillation pyrolysis gas treatment device and is conveyed to a dry distillation unit to be used as fuel; the residual liquid is separated into biomass oil and pyrolysis liquid by an oil-water separator and a three-phase centrifuge, and the biomass oil and the pyrolysis liquid are respectively sent to an oil storage tank and a pyrolysis liquid tank for storage.
Because the kitchen waste can generate pyrolysis gas in the dry distillation process, the pyrolysis gas contains pyrolysis liquid and combustible gas, how to separate and recover the pyrolysis liquid and the combustible gas in the pyrolysis gas is a difficult problem of dry distillation treatment of the kitchen waste, and the traditional method has the following defects:
1. dust causes clogging of the condensing equipment;
2. spraying can generate a large amount of sewage, and the pyrolysis liquid cannot be recycled;
3. pyrolysis gas processing equipment has a risk of backfire explosion.
In the implementation of kitchen waste recycling treatment, in order to ensure the safe and stable operation of organic waste pyrolysis equipment and solve the problems of blockage of condensing equipment, sewage generation, incapability of recycling pyrolysis liquid, tempering explosion and the like in the destructive distillation pyrolysis gas treatment process, the invention discloses a destructive distillation pyrolysis gas treatment device which is used for recovering combustible gas and pyrolysis liquid in pyrolysis gas generated in the destructive distillation process of kitchen waste after the pyrolysis gas is treated by a condensate spraying tank and a gas treatment box, wherein the combustible gas is conveyed to the destructive distillation device to serve as fuel, and the pyrolysis liquid is conveyed to a pyrolysis liquid box.
Referring to fig. 2 and 3, the apparatus for processing pyrolysis gas by dry distillation of the present invention comprises: the dry distillation device 1, the pyrolysis liquid spraying tank 2, the gas treatment tank 3, the safety water tank 4, the pyrolysis liquid tank 5, the cooling circulation water tank 6, the induced draft fan 7, the pyrolysis liquid spraying tank air inlet 8, the hoisting hole 9, the access opening 10, the cooling water pipe 11, the pyrolysis liquid spraying pipe 12, the pyrolysis liquid spraying tank liquid discharge pipe 13, the cooling water outlet pipe 14, the cooling water inlet pipe 15, the gas treatment tank liquid discharge pipe 16, the box body 17, the pyrolysis liquid tank inlet 18, the pyrolysis liquid delivery pump 19, the pyrolysis liquid overflow pipe 20, the pyrolysis liquid sedimentation tank 21, the cooling circulation water tank return pipe 22, the cooling water circulation pump 23, the combustible gas outlet 24, the explosion release port 25, the inspection port 26, the overflow port 27, the blow-off pipe 28, the water replenishing pipe 29, the safety water tank air inlet 30, the second connecting pipe 31, the gas treatment tank explosion release port 32, the gas treatment tank air inlet 33, the first connecting pipe 34, the pyrolysis liquid spraying pipe air inlet 35, a pyrolysis gas outlet 36 of the dry distillation device and a pyrolysis liquid spraying tank explosion venting port 37.
Pyrolysis gas generated in the kitchen waste treatment process by the dry distillation device 1 sequentially enters the pyrolysis liquid spraying tank 2 and the gas treatment box 3 under the action of the induced draft fan 7; after the pyrolysis gas is treated, the combustible gas is discharged from a combustible gas outlet 24 of the gas treatment box 3; the pyrolysis liquid is conveyed to the pyrolysis liquid box 5 through a pyrolysis liquid spraying tank liquid outlet 13 and a gas treatment box liquid outlet pipe 16 through pipelines; the pyrolysis liquid in the pyrolysis liquid box 5 is conveyed to the pyrolysis liquid spraying pipe 12 of the pyrolysis liquid spraying tank 2 through a pyrolysis liquid conveying pump 19
The pyrolysis liquid spraying tank 2 consists of a tank body, a pyrolysis liquid spraying pipe 12, a pyrolysis liquid spraying tank air inlet 8, a pyrolysis liquid spraying tank air outlet 35, a pyrolysis liquid spraying tank liquid discharge pipe 13 and an access hole 10. Pyrolysis gas firstly enters the tank body of the pyrolysis liquid spraying tank 2 from a pyrolysis liquid spraying tank air inlet 8 of the pyrolysis liquid spraying pipe 12 through a pyrolysis liquid pyrolysis gas outlet 36 of the dry distillation device 1, the pyrolysis gas is treated by the pyrolysis liquid spraying tank 2, the pyrolysis liquid is discharged from a pyrolysis liquid spraying tank liquid discharge pipe 13 at the bottom of the pyrolysis liquid spraying tank 2 and conveyed to the pyrolysis liquid tank 5, and the pyrolysis gas is conveyed to a gas treatment tank air inlet 33 of the gas treatment tank 3 through a first connecting pipe 34 from a pyrolysis liquid spraying tank air outlet 35 at the top of the pyrolysis liquid spraying tank 2 and enters the gas treatment tank 3.
The gas treatment box 3 is composed of a cooling water pipe 11, a gas inlet 33 of the gas treatment box, a combustible gas outlet 24, a gas treatment box explosion relief port 32, a second connecting pipe 31, the cooling water pipe 11, a cooling water outlet pipe 14, a cooling water inlet pipe 15, a gas treatment box liquid discharge pipe 16 and an induced draft fan 7. A cooling water inlet pipe 15 of the cooling water pipe 11 is connected with the cooling circulation water tank 6 through a cooling water circulation pump 23; the cooling water pipe 11 is connected with a cooling circulation water tank return pipe 22 of the cooling circulation water tank 6 through a cooling water outlet pipe 14; the explosion venting port 32 of the gas processing tank is connected with the safe water tank air inlet 30 of the safe water tank 4 through a second connecting pipe 31; combustible gas generated after the pyrolysis gas is treated by the gas treatment box 3 is discharged through a combustible gas outlet 24 at the upper part of the gas treatment box 3 and is recycled as fuel; pyrolysis liquid generated after pyrolysis gas is treated by the gas treatment box 3 is conveyed to the pyrolysis liquid box 5 through a gas treatment box liquid discharge pipe 16 at the lower part of the gas treatment box 3.
The safe water tank 4 consists of a tank body, a safe water tank air inlet 30, an explosion venting port 25, a water replenishing pipe 29, an overflow port 27, a sewage discharge pipe 28 and an inspection port 26. The water level in the safety water tank 4 is 85% of the height of the safety water tank 4, the safety water tank air inlet pipe 30 is connected with the gas treatment tank explosion venting port 32 through the second connecting pipe 31, the pyrolysis liquid sprays the tank explosion venting port 37 to be connected, the safety water tank air inlet pipe 30 extends into water, prevent air from flowing into the gas treatment tank 4 through the water seal, when the pyrolysis liquid sprays the combustible gas in the tank 2 or the gas treatment tank 4 to generate backfire explosion, the gas generated by explosion sprays the tank explosion venting port 37 or the gas treatment tank explosion venting port 32 to enter the safety water tank 4 through the second connecting pipe 31, under the action of gas instantaneous pressure, the water in the safety water tank 4 is discharged through the explosion venting port 25 of the safety water tank, thereby achieving the effect of pressure relief, avoiding the explosion gas from causing damage to the gas treatment tank 4 and the pyrolysis liquid spraying tank 2, and ensuring the safe and stable operation of facilities. After the pressure generated by the deflagration gas is discharged through the explosion discharge port 25 of the safety water tank, the water level in the safety water tank 4 is restored to the original water level by the safety water tank 4 through the water replenishing pipe 29.
The destructive distillation pyrolysis gas treatment device can treat pyrolysis gas generated in the process of destructive distillation of household garbage, sludge of sewage treatment plants, livestock manure, industrial organic solid waste, organic hazardous waste, waste oil residues, waste paint buckets, oily sludge and the like in addition to pyrolysis gas generated in the process of destructive distillation of kitchen garbage.
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.
It should be noted that other devices utilized by the invention are known devices, and cooperate with the destructive distillation pyrolysis gas treatment device of the invention to complete the resource treatment of the kitchen waste, so that the details of the known devices are not repeated.
Claims (9)
1. A resource utilization method of kitchen waste comprises the following steps:
1) carrying out hydraulic cleaning and preliminary separation on the kitchen waste;
2) separating out waste metal, waste plastic, bone, glass and ceramic from the separated slag; processing bones into bone powder, packaging and selling waste plastics, crushing, dehydrating and drying the residual food slag, and then carrying out dry distillation;
3) the separated liquid is further separated into biological grease, fine slag and sewage; storing biological grease, performing dry distillation on fine slag materials to convert the fine slag materials into biological carbon, and desulfurizing biogas generated after anaerobic treatment of sewage to serve as fuel of a dry distillation unit;
4) drying the biogas residues and then carrying out dry distillation;
5) the combustible gas is condensed and separated from the dry distillation pyrolysis gas generated in the dry distillation process and is used as the fuel of a dry distillation unit, and the biomass oil and the pyroligneous liquor are separated from the rest liquid through oil-water separation.
2. The resource utilization method of kitchen waste according to claim 1, wherein the slag in step 2 is sorted by photoelectricity, eddy current, electromagnetism.
3. The resource utilization method of kitchen waste according to claim 1, wherein the sewage separated in step 3 is subjected to anaerobic treatment, aerobic treatment and adsorption treatment.
4. The method for recycling kitchen waste according to claim 1, wherein in step 4, the biogas residue with water content of 80% is dried to water content of less than 30%.
5. The treatment system for realizing the resource utilization method of the kitchen waste as claimed in claim 1, which comprises:
1) the kitchen waste pretreatment system comprises a pretreatment workshop provided with a high-rise material pouring platform, wherein after being transported to a treatment site by a vehicle for receiving and transporting kitchen waste, the kitchen waste is poured into a receiving hopper through the high-rise material pouring platform;
2) the rotary drum sieve is used for carrying out hydraulic cleaning and primary separation on the kitchen waste in the receiving hopper;
3) the photoelectric, eddy current and electromagnetic sorting device is used for further sorting out waste metal, waste plastic, bone, glass and ceramic from the primarily separated slag;
4) the bone crusher is used for processing the bones separated by the photoelectric, eddy and electromagnetic sorting device into bone powder and packaging the bone powder;
5) the residue crusher, the dehydrator and the dryer are used for crushing, dehydrating and drying the food residues separated by the photoelectric, eddy and electromagnetic sorting device and then feeding the food residues into the dry distillation device;
6) the rotary drum sieve is connected with the rotary fine grid, the oil separation tank and the three-phase centrifuge, and the liquid screened by the rotary drum sieve is further separated into biological grease, pyroligneous liquor, fine slag and sewage; wherein, the biological oil and fat enter an oil storage tank for storage, the pyroligneous liquor is sent to a pyroligneous liquor tank for storage, and the fine slag material enters a dry distillation device after being dried;
7) the anaerobic water inlet tank and the anaerobic reactor are used for carrying out anaerobic treatment on the sewage generated in the whole process, and the biogas generated after the treatment is desulfurized and then is used as the fuel of the dry distillation unit;
8) the aerobic treatment device, the magnetic flocculation treatment device, the active coke filtering and adsorbing deep treatment device and the reverse osmosis treatment device are used for performing aerobic treatment, magnetic flocculation treatment, active coke filtering and adsorbing deep treatment and reverse osmosis treatment on the water treated by the anaerobic reactor and discharging the water after reaching the standard;
9) the intermediate bin, the conveying device and the dry distillation device are used for carrying out dry distillation on the dried biogas residues;
10) the charcoal bin is used for storing charcoal converted by dry distillation;
11) the destructive distillation pyrolysis gas treatment device is used for treating pyrolysis gas generated in the destructive distillation process of the kitchen waste through the condensate spraying tank and the gas treatment box, and recovering combustible gas and pyrolysis liquid in the pyrolysis gas, wherein the combustible gas is conveyed to the destructive distillation device to serve as fuel, and the pyrolysis liquid is conveyed to the pyrolysis liquid box;
the dry distillation pyrolysis gas treatment device comprises: the dry distillation device, pyrolysis liquid sprays the jar, the gas processing case, the safety water tank, the pyrolysis liquid case, the cooling circulation water tank, the draught fan, pyrolysis liquid sprays jar air inlet, the hole for hoist, the access hole, the cooling water pipe, pyrolysis liquid sprays the pipe, pyrolysis liquid sprays jar fluid-discharge tube, the cooling water outlet pipe, the cooling water inlet tube, gas processing case fluid-discharge tube, the box, pyrolysis liquid case import, pyrolysis liquid delivery pump, pyrolysis liquid overflow pipe, pyrolysis liquid sedimentation tank, cooling circulation water tank wet return, the cooling water circulating pump, the combustible gas export, the explosion venting mouth, the inspection opening, the overflow mouth, the blow off pipe, the moisturizing pipe, the safety water tank air inlet, the second connecting pipe, gas processing case explosion venting mouth, gas processing case air inlet, first connecting pipe, pyrolysis liquid sprays jar air inlet, dry distillation device pyrolysis gas export and pyrolysis liquid sprays jar explosion venting mouth.
6. The treatment system according to claim 5, wherein pyrolysis gas generated by the dry distillation device in the kitchen waste treatment process enters the pyrolysis liquid spraying tank and the gas treatment box in sequence under the action of the induced draft fan; after the pyrolysis gas is treated, the combustible gas is discharged from a combustible gas outlet of the gas treatment box; the pyrolysis liquid is conveyed to the pyrolysis liquid box through a liquid outlet of the pyrolysis liquid spraying tank and a liquid outlet pipe of the gas treatment box through pipelines; and the pyrolysis liquid in the pyrolysis liquid box is conveyed to a pyrolysis liquid spraying pipe of the pyrolysis liquid spraying tank through a pyrolysis liquid conveying pump.
7. The treatment system of claim 5 or 6, wherein the pyrolysis liquid spray tank consists of a tank body, a pyrolysis liquid spray pipe, a pyrolysis liquid spray tank air inlet, a pyrolysis liquid spray tank air outlet, a pyrolysis liquid spray tank liquid discharge pipe, and an access opening; pyrolysis gas firstly enters a pyrolysis liquid spraying tank through a pyrolysis liquid spraying tank air inlet from a pyrolysis liquid pyrolysis gas outlet of a dry distillation device, the pyrolysis gas is treated by the pyrolysis liquid spraying tank, the pyrolysis liquid is discharged from a pyrolysis liquid spraying tank liquid discharge pipe at the bottom of the pyrolysis liquid spraying tank and conveyed to a pyrolysis liquid box, and the pyrolysis gas is conveyed to a gas treatment box air inlet through a first connecting pipe from a pyrolysis liquid spraying tank air outlet at the top of the pyrolysis liquid spraying tank and enters a gas treatment box.
8. The treatment system of claim 7, wherein the gas treatment tank consists of a cooling water pipe, a gas inlet of the gas treatment tank, a combustible gas outlet, a vent and explosion port of the gas treatment tank, a second connecting pipe, a cooling water outlet pipe, a cooling water inlet pipe, a liquid discharge pipe of the gas treatment tank and an induced draft fan; the cooling water inlet pipe is connected with the cooling circulating water tank through a cooling water circulating pump; the cooling water pipe is connected with a cooling circulation water tank return pipe of the cooling circulation water tank through a cooling water outlet pipe; the explosion venting port of the gas treatment tank is connected with the gas inlet of the safety water tank through a second connecting pipe; combustible gas generated after the pyrolysis gas is treated by the gas treatment box is discharged through a combustible gas outlet at the upper part of the gas treatment box and is recycled as fuel; pyrolysis liquid generated after pyrolysis gas is treated by the gas treatment box is conveyed to the pyrolysis liquid box through a liquid discharge pipe of the gas treatment box at the lower part of the gas treatment box.
9. The treatment system of claim 5, wherein the safety water tank consists of a tank body, a safety water tank air inlet, an explosion venting port, a water replenishing pipe, an overflow port, a drain pipe and an inspection port; the water level in the safety water tank is 85% of the height of the safety water tank, the air inlet pipe of the safety water tank is connected with the explosion venting port of the gas treatment tank and the explosion venting port of the pyrolysis liquid spraying tank through a second connecting pipe, the air inlet pipe of the safety water tank extends into water, and air is prevented from flowing into the gas treatment tank through a water seal; when the combustible gas in the pyrolysis liquid spraying tank or the gas treatment box is subjected to tempering and deflagration, the gas generated by deflagration enters the safety water tank through the second connecting pipe from the deflagration liquid spraying tank explosion venting port or the gas treatment box explosion venting port, and the water in the safety water tank is drained out through the explosion venting port of the safety water tank under the action of the instantaneous pressure of the gas; after the pressure generated by the deflagration gas is discharged out through the explosion discharge port of the safety water tank, the water level in the safety water tank is restored to the original water level through the water replenishing pipe by the safety water tank.
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| CN201911371932.6A CN111408601A (en) | 2019-12-26 | 2019-12-26 | Kitchen waste resource utilization method and treatment system |
| PCT/CN2020/139516 WO2021129819A1 (en) | 2019-12-26 | 2020-12-25 | Kitchen waste recycling method and treatment system |
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| CN201911371932.6A CN111408601A (en) | 2019-12-26 | 2019-12-26 | Kitchen waste resource utilization method and treatment system |
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| WO2021129819A1 (en) * | 2019-12-26 | 2021-07-01 | 密西西比国际水务有限公司 | Kitchen waste recycling method and treatment system |
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| CN113441531B (en) * | 2021-07-26 | 2024-05-31 | 中国环境保护集团有限公司 | Kitchen waste pretreatment system and method |
| CN114308981B (en) * | 2021-12-27 | 2023-04-07 | 上海工程技术大学 | Multi-generation comprehensive utilization system and treatment process for treating wet garbage by supercritical water |
| CN115090651B (en) * | 2022-06-13 | 2023-06-09 | 中国科学院广州能源研究所 | Comprehensive treatment method for kitchen waste containing impurities |
| CN115958051B (en) * | 2022-12-02 | 2024-07-09 | 大连重工环保工程有限公司 | Cooperative treatment system and treatment method for food wastes and kitchen wastes |
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