CN113145609B - Sequencing batch type pretreatment system and method for anaerobic digestion of high-solid-content kitchen garbage - Google Patents
Sequencing batch type pretreatment system and method for anaerobic digestion of high-solid-content kitchen garbage Download PDFInfo
- Publication number
- CN113145609B CN113145609B CN202110276215.6A CN202110276215A CN113145609B CN 113145609 B CN113145609 B CN 113145609B CN 202110276215 A CN202110276215 A CN 202110276215A CN 113145609 B CN113145609 B CN 113145609B
- Authority
- CN
- China
- Prior art keywords
- conveyor
- kitchen waste
- anaerobic digestion
- belt
- waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000029087 digestion Effects 0.000 title claims abstract description 44
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 29
- 238000012163 sequencing technique Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000010806 kitchen waste Substances 0.000 claims abstract description 56
- 238000000855 fermentation Methods 0.000 claims abstract description 40
- 230000004151 fermentation Effects 0.000 claims abstract description 40
- 239000007787 solid Substances 0.000 claims abstract description 28
- 239000002699 waste material Substances 0.000 claims abstract description 21
- 238000012216 screening Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000002203 pretreatment Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 30
- 230000005540 biological transmission Effects 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 210000000988 bone and bone Anatomy 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 235000014102 seafood Nutrition 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000010907 mechanical stirring Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 235000010585 Ammi visnaga Nutrition 0.000 description 1
- 244000153158 Ammi visnaga Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A sequencing batch pretreatment system and a sequencing batch pretreatment method for anaerobic digestion of high-solid kitchen waste relate to treatment and disposal of the high-solid kitchen waste and a method thereof. The method aims to solve the technical problems that hard and difficultly degradable components in the kitchen waste damage a crushing device and a subsequent anaerobic digestion stirring device, and the kitchen waste is low in anaerobic digestion gas production rate after direct crushing and screening treatment. The pretreatment system comprises a bag breaking machine, a first conveyor, a leachate storage tank, a pump, a pre-fermentation tank, a second conveyor, a perforated conveyor belt, a pressurized rubber roller, a discharge hopper, a scraper and a waste tank; the leachate storage tank is connected with the pre-fermentation tank through a pump; the bag breaking machine is connected with the pre-fermentation tank through a first conveyor; the pre-fermentation tank is connected with a belt conveyer with holes through a second conveyer; the waste material groove is positioned at the tail end of the belt with the hole; the scraper is arranged between the waste material groove and the conveying belt with holes. The method comprises the following steps: and breaking the bag of the kitchen waste, then feeding the kitchen waste into a pre-fermentation tank for pre-fermentation, and then extruding and screening to finish the pretreatment. Can be used in the field of garbage disposal.
Description
Technical Field
The invention relates to treatment and disposal of high-solid-content kitchen waste and a method, belonging to the field of recycling.
Background
The Ministry of housing 11 months in 2019 revises the standard of 'domestic garbage classification mark', kitchen garbage is defined as perishable and organic-matter-containing domestic garbage, high organic matter of the kitchen garbage can be used for energy recovery and nutrient recovery through anaerobic digestion, and the emission of greenhouse gases is reduced. However, due to the current situation of garbage classification, the kitchen garbage is mixed with a lot of hard impurity garbage which is difficult to be digested anaerobically, such as bones, seafood shells, toothpicks and the like, and the impurities can cause irreversible serious damage to a mechanical stirring device for anaerobic digestion, so that the pretreatment process of the kitchen garbage for anaerobic digestion is very important. At present, the anaerobic digestion pretreatment of kitchen waste is to transfer the kitchen waste into an anaerobic digestion tank after crushing and secondary screening, hard substances in the kitchen waste usually accelerate the crushing and the loss of a screening device, and the kitchen waste directly transferred into the digestion tank after simple crushing and screening has poor hydrolysis and acidification effects and is not beneficial to further efficiently producing methane in the digestion tank. Therefore, a device capable of effectively sorting and improving gas production efficiency needs to be developed aiming at the pretreatment of anaerobic digestion of high-solid-content town kitchen waste with the solid content of more than or equal to 25 percent, the damage of hard objects such as bones to a crushing and screening device and the damage of a mechanical stirring device in an anaerobic digestion tank are avoided as much as possible, and high methane yield is ensured.
Disclosure of Invention
The invention provides a sequencing batch type pretreatment system and a sequencing batch type pretreatment method for anaerobic digestion of kitchen waste with high solid content, and aims to solve the technical problems that hard and nondegradable components in the kitchen waste seriously damage a traditional pretreatment crushing device and a subsequent anaerobic digestion stirring device and the anaerobic digestion gas yield of the kitchen waste after direct crushing, screening and treatment. The pretreatment system replaces a traditional secondary screening system with a mode of pre-fermentation and extrusion screening, can reduce the loss of perishable organic matters, improve the resource utilization rate, reduce the system energy consumption, improve the gas production capacity of anaerobic digestion in the subsequent workshop section, and simultaneously solves the problem of damage of hard and nondegradable components to equipment in the kitchen waste treatment process.
The sequencing batch type pretreatment system for anaerobic digestion of high-solid-content kitchen waste comprises a bag breaker 1, a first conveyor 2, a leachate storage tank 3, a pump 4, a pre-fermentation tank 5, a second conveyor 6, a belt conveyer 7 with holes, a pressurized rubber roller 8, a discharge hopper 9, a scraper 10 and a waste tank 11;
wherein the upper part of the shell 5-1 of the pre-fermentation tank 5 is a cylinder, and the bottom is a cone; spray headers 5-2 are uniformly distributed at the top in the shell 5-1, a stirring paddle 5-3 is arranged at the cone part, and the stirring paddle 5-3 is driven by a variable frequency motor 5-4 arranged outside the shell; a feeding hole 5-5 is formed in the side wall of the shell 5-1, and a discharging hole 5-6 is formed in the bottom of the cone;
the leachate storage tank 3 is connected with a spray header 5-2 in the pre-fermentation tank 5 through a pump 2;
the bag breaking machine 1 is connected with a feed inlet 5-5 of a pre-fermentation tank 5 through a first conveyor 2;
the pressurizing rubber roller 8 is arranged above the belt conveyer 7-1 with holes of the belt conveyer 7 with holes, and the distance between the pressurizing rubber roller 8 and the belt conveyer 7-1 with holes is 1-5 mm; the discharge hopper 9 is arranged right below the belt conveyer 7-1 with holes;
a discharge port 5-6 of the pre-fermentation tank 5 is connected with a belt conveyer with holes 7 through a second conveyer 6;
the waste chute 11 is positioned at the tail end of the belt conveyer with holes 7; the scraper 10 is arranged between the waste chute 11 and the belt conveyer with holes 7.
Furthermore, the stirring paddle 5-3 has 2-3 paddles; the diameter of the paddle is 100-120 mm.
Furthermore, the number of the spray headers 5-2 is 8-12.
Furthermore, the bag breaking machine 1 is a roller bag breaking machine with a cutter head, and rollers can rotate forwards and backwards to avoid winding.
Furthermore, the leachate in the leachate storage tank 3 is biogas slurry generated in the subsequent anaerobic digestion process, and can be recycled.
Furthermore, the diameter of the circular holes uniformly distributed on the belt conveyer with holes 7-1 is 20-30 mm; the round holes play a role in screening, and can effectively screen unbreakable substances such as bone bars, seafood shells and plastic bags.
Furthermore, the pressurizing rubber rollers 8 are made of rubber and have toughness, 3 to 5 pressurizing rubber rollers are arranged in one group, and the distance between each pressurizing rubber roller 8 and the perforated transmission belt 7-1 is gradually reduced to 1 to 1.5mm from 5 to 7mm in the feeding direction to the discharging direction. The kitchen waste is crushed and screened under the action of step-by-step extrusion, and the passing rate of the kitchen waste is improved.
Furthermore, a filter grid 9-1 which is in a shape of ^ and has a horizontal inclination angle of 15-20 degrees is arranged in the discharge hopper 9; the size of the grid holes on the grid is 4mm multiplied by 38mm, and the materials falling into the discharge hopper 9 are filtered by the filter grid 9-1, so that the solid content of the materials is kept at 25-30%, and the gas production rate of the kitchen waste can be improved in the subsequent anaerobic digestion process.
Furthermore, the liquid filtered out by the grid can be reused as leachate and transported to the leachate storage tank 3.
Furthermore, the longitudinal section of the perforated conveyor belt 7-1 of the perforated conveyor belt machine 7 is rectangular in a vertical plane, which is beneficial to saving space.
Furthermore, the bag breaking machine 1, the pre-fermentation tank 5, the perforated conveyer belt 7, the pressurizing rubber roller 8, the discharge hopper 9, the waste tank 11, the first conveyer 2 and the second conveyer 6 are respectively provided with a closed cover and an exhaust pipeline, and the discharged gas is sent to a deodorization unit for treatment so as to prevent environmental pollution.
The method for pretreating high-solid kitchen waste by using the sequencing batch pretreatment system for anaerobic digestion of high-solid kitchen waste comprises the following steps:
1. after the kitchen waste is added into the bag breaking machine 1, the plastic bags of the bagged waste are broken through bag breaking cutters on the outer circle of the roller and the inner wall of the shell, and the scattered kitchen waste is transmitted by a first conveyor 2 and a first conveyor and enters a pre-fermentation tank 5 through a feeding hole 5-5; pressurizing the leachate in the leachate storage tank 3 by a pump 4 while feeding, and uniformly spraying the leachate onto the kitchen garbage in the pre-fermentation tank 5 from a spray header 5-2, so as to ensure that the weight ratio of the kitchen garbage to the leachate is 4:1;
2. the kitchen waste is pre-fermented in a pre-fermentation tank 5, after the pre-fermentation is completed, a discharge port 5-6 is opened, a variable frequency motor 5-4 is started to drive a stirring paddle 5-3 to rotate, the fluidity of the material is increased by increasing local stirring to assist discharging, the material is discharged through the discharge port 5-6 and then is conveyed to a perforated conveying belt 7-1 of a perforated conveying belt machine 7 by a second conveyor 6;
3. the pre-fermented materials are conveyed to a position between a pressurizing rubber roller 8 and a perforated transmission belt 7-1 by a perforated transmission belt machine 7, and the materials with the particle size smaller than the aperture of the hole on the perforated transmission belt 7-1 fall into a discharge hopper 9 below after extrusion and screening; the materials with the grain diameter larger than the aperture of the hole on the transmission belt 7-1 with the hole are scraped by the scraper 10 and fall into the waste tank 11, thus finishing the pretreatment of the kitchen garbage.
The pre-fermentation in the step two is to ferment for 3 to 4 days at normal temperature so as to hydrolyze and acidify the kitchen garbage.
The sequencing batch pretreatment system and the sequencing batch pretreatment method for anaerobic digestion of high-solid-content kitchen garbage have the following advantages:
1. the bag breaking machine and the pressurizing roller have the positive and negative rotation functions, and can effectively remove the winding through the reverse rotation during winding, so that the long-term stable operation is ensured.
2. The invention changes the traditional pretreatment mode of crushing and secondary screening, fully utilizes the characteristic that the material is easier to extrude and crush after being hydrolyzed and acidified, firstly performs the pre-fermentation, hydrolysis and acidification on the material, and effectively improves the hydrolysis and acidification efficiency of the material in a pre-fermentation tank through the biogas slurry leaching. The kitchen garbage treated by the device and the method has the methane yield of 400-600 mL/(gVS.d) after being treated by the anaerobic digestion system, and is improved by 40-60 percent compared with the kitchen garbage without pretreatment, because the kitchen garbage treated by the device has stable solid content rate which is in the range of 25-30 percent, and simultaneously has high hydrolytic acidification degree, thereby being beneficial to the subsequent anaerobic digestion.
3. The extrusion screening system adopting the rubber material effectively avoids the damage of hard materials in kitchen garbage such as the big bone rod, the seafood shell and the like to the system, and fully screens materials which are difficult to be anaerobically digested such as the plastic bag, the big bone rod, the seafood shell and the like, thereby greatly improving the organic matter content of the materials.
4. The discharge hopper is provided with the filter grating, so that slurry in the kitchen waste can be separated, the solid content of discharged materials can be ensured, the change of the water content caused by the change of components of the kitchen waste is adapted, and the requirement of the solid content of materials entering the high-solid content anaerobic digestion system is ensured.
The sequencing batch type pretreatment system and the sequencing batch type pretreatment method for anaerobic digestion of high-solid-content kitchen garbage are suitable for treating town kitchen garbage with the solid content of more than or equal to 25 percent, and are more suitable for the field of pretreatment of anaerobic digestion.
Drawings
FIG. 1 is a schematic diagram of a sequencing batch pretreatment system for anaerobic digestion of high solids kitchen waste in accordance with the present invention. In the figure, 1 is a bag breaking machine, 2 is a first conveyor, 3 is a leachate storage tank, 4 is a pump, 5 is a pre-fermentation tank, 5-1 is a shell, 5-2 is a spray head, 5-3 is a stirring paddle, 5-4 is a variable frequency motor, and 5-5 is a feed inlet; 5-6 is a discharge port, 6 is a second conveyor, 7 is a belt conveyer with holes, 7-1 is a transmission belt with holes, 8 is a pressurizing rubber roller, 9 is a discharge hopper, 9-1 is a filtering grid, 10 is a scraper and 11 is a waste tank. → the conveying direction of the kitchen waste;
indicating the direction of flow of the leachate;
indicating the direction of rotation.
Detailed Description
The following examples were used to demonstrate the beneficial effects of the present invention.
Example 1: the sequencing batch pretreatment system for anaerobic digestion of high-solid kitchen waste comprises a bag breaker 1, a first conveyor 2, a leachate storage tank 3, a pump 4, a pre-fermentation tank 5, a second conveyor 6, a belt conveyor with holes 7, a pressurized rubber roller 8, a discharge hopper 9, a scraper 10 and a waste chute 11;
the bag breaking machine 1 is a roller bag breaking machine with a cutter head;
the upper part of the shell 5-1 of the pre-fermentation tank 5 is a cylinder, and the bottom is a cone; 8 spray headers 5-2 are uniformly distributed at the top in the shell 5-1, 2 stirring paddles 5-3 with the paddle diameter of 100mm are arranged at the left side and the right side of the cone part, and the stirring paddles 5-3 are driven by a variable frequency motor 5-4 arranged outside the shell; a feed port 5-5 is arranged on the side wall of the shell 5-1, and a discharge port 5-6 is arranged at the bottom of the cone;
the leachate storage tank 3 is connected with a spray header 5-2 in the pre-fermentation tank 5 through a pump 2;
the bag breaking machine 1 is connected with a feed inlet 5-5 of a pre-fermentation tank 5 through a first conveyor 2;
the longitudinal section of a perforated transmission belt 7-1 of the perforated transmission belt machine 7 is rectangular, and the diameter of round holes uniformly distributed on the perforated transmission belt 7-1 is 20mm;3 pressurizing rubber rollers 8 are arranged above a belt conveyer 7-1 with holes of the belt conveyer 7, the distance between the 3 pressurizing rubber rollers 8 and the belt conveyer 7-1 with holes is 5mm, 3mm and 1mm in sequence from the feeding direction to the discharging direction, the distances are gradually reduced, the diameter of each pressurizing rubber roller 8 is 200mm, and the length of each pressurizing rubber roller is 500mm; the discharge hopper 9 is arranged right below the belt conveyer 7-1 with holes and is positioned in a rectangular area surrounded by the belt conveyer 7-1 with holes; a filter grid 9-1 which is in a shape of ^ and has a horizontal inclination angle of 15 degrees is arranged in the discharge hopper 9; the size of the grid holes on the grid is 4mm multiplied by 38mm, and the materials falling into the discharge hopper 9 are filtered by the filter grid 9-1, so that the solid content of the materials is kept at 25-30%, and the gas production rate of the kitchen waste can be improved in the subsequent anaerobic digestion process;
a discharge port 5-6 of the pre-fermentation tank 5 is connected with a belt conveyer 7 with holes through a second conveyer 6;
the waste material groove 11 is positioned at the tail end of the belt conveyer with holes 7; the scraping plate 10 is arranged between the waste material groove 11 and the belt conveyor with holes 7 and is used for scraping off materials adhered to the belt conveyor with holes 7-1 in an auxiliary mode.
The method for pretreating high-solid kitchen waste by using the sequencing batch pretreatment system for anaerobic digestion of high-solid kitchen waste in example 1 comprises the following steps:
1. after kitchen waste containing the big bone sticks and the seafood shells is added into the bag breaking machine 1, bag breaking knives on the outer circle of the roller and the inner wall of the machine shell are used for breaking plastic bags of the bagged waste, and the scattered kitchen waste is conveyed by the first conveyor 2 and the first conveyor and enters the pre-fermentation tank 5 through the feed inlet 5-5; pressurizing the leachate in the leachate storage tank 3 by a pump 4 while feeding, and uniformly spraying the leachate onto the kitchen garbage in the pre-fermentation tank 5 from a spray header 5-2, so as to ensure that the weight ratio of the kitchen garbage to the leachate is 4:1;
2. the kitchen waste is pre-fermented for 3 days in a pre-fermentation tank 5, after the pre-fermentation is finished, a discharge port 5-6 is opened, a variable frequency motor 5-4 is started to drive a stirring paddle 5-3 to rotate clockwise at the speed of 100rpm, the fluidity of the materials is increased by increasing local stirring to assist the discharge, the materials are discharged through the discharge port 5-6, and then are conveyed to a porous conveying belt 7-1 of a porous conveying belt machine 7 by a second conveyor 6;
3. the pre-fermented materials are conveyed to a position between a pressurizing rubber roller 8 and a porous transmission belt 7-1 by a porous transmission belt machine 7, and the materials with the particle size smaller than the aperture of the hole on the porous transmission belt 7-1 fall into a discharge hopper 9 below after extrusion and screening; the materials with the grain diameter larger than the aperture of the hole on the transmission belt 7-1 with the hole are scraped by the scraper 10 and fall into the waste tank 11, so that hard materials such as big bone sticks, seafood shells and the like in the kitchen waste are separated, and the pretreatment of the kitchen waste is completed. The solid content of the pretreated kitchen garbage reaches 25-30%.
According to the sequencing batch type pretreatment system and method for anaerobic digestion of high-solid kitchen waste, inorganic substances such as bone bars, seafood shells and plastic bags are screened to the greatest extent, and the organic matter content of the kitchen waste is greatly improved. Meanwhile, the damage of hard substances such as bone bars, seafood shells and the like to crushing and mechanical stirring systems is solved, the solid content of the pretreated kitchen garbage is stable, and the stable operation of a subsequent anaerobic digestion system is ensured.
The pretreated kitchen waste enters a subsequent anaerobic digestion working section, filtrate at the lower layer of the grating is recycled as leachate, and oversize products with large particles such as bone bars, seafood shells, plastic bags and the like in the waste tank 11 can be subjected to subsequent incineration treatment.
The kitchen waste which is not pretreated and the kitchen waste pretreated by the embodiment are subjected to anaerobic digestion at the same time, and the result shows that the methane yield of the kitchen waste pretreated by the embodiment reaches 400-600 mL/(gVS. D), the methane yield is improved by 40-60% compared with that of the kitchen waste which is not pretreated, the solid content of the kitchen waste after pretreatment is stabilized at 25-30%, and the stable operation of a subsequent anaerobic digestion system is ensured.
Claims (8)
1. A sequencing batch type pretreatment system for anaerobic digestion of high-solid kitchen waste is characterized by comprising a bag breaking machine (1), a first conveyor (2), a leachate storage tank (3), a pump (4), a pre-fermentation tank (5), a second conveyor (6), a belt conveyor with holes (7), a pressurizing rubber roller (8), a discharge hopper (9), a scraper (10) and a waste tank (11);
wherein the upper part of the shell (5-1) of the pre-fermentation tank (5) is a cylinder, and the bottom is a cone; spray headers (5-2) are uniformly distributed at the top in the shell (5-1), a stirring paddle (5-3) is arranged at the cone part, and the stirring paddle (5-3) is driven by a variable frequency motor (5-4) arranged outside the shell; a feeding hole (5-5) is formed in the side wall of the shell (5-1), and a discharging hole (5-6) is formed in the bottom of the cone;
the leachate storage tank (3) is connected with a spray header (5-2) in the pre-fermentation tank (5) through a pump (2);
the bag breaking machine (1) is connected with a feed inlet (5-5) of the pre-fermentation tank (5) through a first conveyor (2);
the pressurizing rubber roller (8) is arranged above the perforated transmission belt (7-1) of the perforated transmission belt machine (7), and the distance between the pressurizing rubber roller (8) and the perforated transmission belt (7-1) is 1-5 mm; the discharge hopper (9) is arranged right below the belt with holes (7-1); the diameter of the circular holes uniformly distributed on the belt with holes (7-1) is 20-30 mm; a filter grid (9-1) which is in a shape of ^ and has a horizontal inclination angle of 15-20 degrees is arranged in the discharge hopper (9); the size of the grid holes on the grid is 4mm multiplied by 38mm, and the materials falling into the discharge hopper (9) are filtered by the filtering grid (9-1);
a discharge port (5-6) of the pre-fermentation tank (5) is connected with a belt conveyor (7) with holes through a second conveyor (6);
the waste material groove (11) is positioned at the tail end of the belt conveyor with holes (7); the scraper (10) is arranged between the waste material groove (11) and the belt conveyor with holes (7).
2. The sequencing batch pretreatment system for anaerobic digestion of high solids kitchen waste according to claim 1, wherein the paddles (5-3) have 2-3 blades; the diameter of the paddle is 100-120 mm.
3. The sequencing batch pretreatment system for anaerobic digestion of high solids kitchen waste according to claim 1 or 2, wherein the number of spray headers (5-2) is 8-12.
4. The sequencing batch pre-treatment system for anaerobic digestion of high solids kitchen waste according to claim 1 or 2, characterized in that the bag breaker (1) is a bladed roller bag breaker.
5. The sequencing batch pre-treatment system for anaerobic digestion of high-solids kitchen waste as claimed in claim 1 or 2, wherein the leachate in the leachate storage tank (3) is biogas slurry from the subsequent anaerobic digestion process, and can be recycled.
6. The sequencing batch pretreatment system for anaerobic digestion of high solids kitchen waste according to claim 1 or 2, wherein the pressurized squeegee (8) is made of rubber, and a group of 3-5 squeegee (8) is arranged from the feeding direction to the discharging direction, and the distance between each pressurized squeegee (8) and the perforated conveyor belt (7-1) is gradually reduced from 5-7 mm to 1-1.5 mm.
7. A method for pretreating high solid content kitchen waste by using the pretreatment system of claim 1, wherein the method comprises the steps of:
1. after the kitchen waste is added into the bag breaking machine (1), the plastic bags of the bagged waste are broken through bag breaking cutters on the outer circle of the roller and the inner wall of the shell, and the scattered kitchen waste is conveyed by a first conveyor (2) and a first conveyor and enters a pre-fermentation tank (5) through a feeding hole (5-5); pressurizing the leachate in the leachate storage tank (3) by a pump (4) while feeding, and uniformly spraying the leachate onto the kitchen garbage in the pre-fermentation tank (5) from a spray header (5-2), so as to ensure that the weight ratio of the kitchen garbage to the leachate is 4:1;
2. the kitchen waste is pre-fermented in a pre-fermentation tank (5), after the pre-fermentation is finished, a discharge port (5-6) is opened, a variable frequency motor (5-4) is started to drive a stirring paddle (5-3) to rotate, the materials are discharged through the discharge port (5-6), and then are conveyed to a perforated conveying belt (7-1) of a perforated conveying belt machine (7) by a second conveyor (6);
3. the pre-fermented materials are conveyed between a pressurizing rubber roller (8) and a porous transmission belt (7-1) by a porous transmission belt machine (7), and the materials with the particle size smaller than the aperture of the hole on the porous transmission belt (7-1) fall into a discharge hopper (9) below after extrusion and screening; the materials with the grain diameter larger than the aperture of the hole on the transmission belt (7-1) with the hole are scraped by the scraper (10) and fall into the waste tank (11) to finish the pretreatment of the kitchen garbage.
8. The method according to claim 7, wherein the pre-fermentation is performed at room temperature for 3 to 4 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110276215.6A CN113145609B (en) | 2021-03-15 | 2021-03-15 | Sequencing batch type pretreatment system and method for anaerobic digestion of high-solid-content kitchen garbage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110276215.6A CN113145609B (en) | 2021-03-15 | 2021-03-15 | Sequencing batch type pretreatment system and method for anaerobic digestion of high-solid-content kitchen garbage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113145609A CN113145609A (en) | 2021-07-23 |
| CN113145609B true CN113145609B (en) | 2022-11-15 |
Family
ID=76887154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110276215.6A Active CN113145609B (en) | 2021-03-15 | 2021-03-15 | Sequencing batch type pretreatment system and method for anaerobic digestion of high-solid-content kitchen garbage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113145609B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008114126A (en) * | 2006-11-01 | 2008-05-22 | Sumitomo Heavy Industries Environment Co Ltd | Waste treatment apparatus |
| CN103706618A (en) * | 2013-12-23 | 2014-04-09 | 郑顺潮 | Domestic garbage treatment system and method for treating domestic garbage by same |
| CN111514975A (en) * | 2020-05-17 | 2020-08-11 | 张靖 | Garbage disposal device convenient for distinguishing garbage recovery in different states and implementation method |
| CN112077115A (en) * | 2020-08-21 | 2020-12-15 | 中国市政工程华北设计研究总院有限公司 | Kitchen waste extrusion screening pretreatment and dry/wet anaerobic fermentation treatment process system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2585865Y (en) * | 2002-11-29 | 2003-11-12 | 李声寿 | Two-phase anaerobic dry fermenting treatment plant for house refuse |
| US6962255B2 (en) * | 2003-05-13 | 2005-11-08 | Steven Tse | Apparatus and method of separating medium-sized materials from garbage for collection |
| KR100745186B1 (en) * | 2006-04-06 | 2007-08-01 | (주)정봉 | Organic waste processing unit and the method that use anaerobic digestion method |
| CN102921703B (en) * | 2012-11-09 | 2014-11-12 | 北京嘉博文生物科技有限公司 | Kitchen garbage pre-treatment technology and system thereof |
| CN102989742B (en) * | 2012-11-30 | 2014-10-22 | 同济大学 | Integrated homogenizing process of prehydrolysis and mechanical disruption of biomass garbage |
| CN104801528B (en) * | 2014-01-28 | 2017-04-12 | 常州大学 | Domestic waste organic treatment method |
| CN105781455A (en) * | 2016-05-03 | 2016-07-20 | 长江大学 | Drilling fluid recovery and solid control device |
| CN107511388A (en) * | 2017-07-24 | 2017-12-26 | 深圳市海吉星环保有限责任公司 | A kind of organic perishable garbage anaerobic fermentation cogeneration of heat and power biogas slurry fertilizer manufacture and system |
| CN109290343A (en) * | 2018-11-15 | 2019-02-01 | 厦门市联谊吉源环保工程有限公司 | The perishable rubbish collaboration Anaerobic Digestion equipment of polymorphic type and processing method |
| CN212525407U (en) * | 2020-05-30 | 2021-02-12 | 义乌市深能再生资源利用有限公司 | Kitchen garbage fermentation treatment device |
| CN111872065B (en) * | 2020-08-07 | 2023-08-04 | 青岛有德环境科技有限公司 | Extrusion system for household garbage disposal |
| CN112090559A (en) * | 2020-08-26 | 2020-12-18 | 蔡先婷 | Construction waste is with smashing recovery unit |
-
2021
- 2021-03-15 CN CN202110276215.6A patent/CN113145609B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008114126A (en) * | 2006-11-01 | 2008-05-22 | Sumitomo Heavy Industries Environment Co Ltd | Waste treatment apparatus |
| CN103706618A (en) * | 2013-12-23 | 2014-04-09 | 郑顺潮 | Domestic garbage treatment system and method for treating domestic garbage by same |
| CN111514975A (en) * | 2020-05-17 | 2020-08-11 | 张靖 | Garbage disposal device convenient for distinguishing garbage recovery in different states and implementation method |
| CN112077115A (en) * | 2020-08-21 | 2020-12-15 | 中国市政工程华北设计研究总院有限公司 | Kitchen waste extrusion screening pretreatment and dry/wet anaerobic fermentation treatment process system |
Non-Patent Citations (2)
| Title |
|---|
| 厨余垃圾卧式干法厌氧消化及其预处理方案探讨;刘淑玲等;《环境卫生工程》;20170225(第01期);第39-41页 * |
| 高含固厨余垃圾垂直流厌氧处理系统的构建与启动;汤云榕等;《环境科学学报》;20201031(第10期);第153-162页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113145609A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106077021B (en) | Kitchen waste and farmer market garbage resourceful treatment anaerobic fermentation system and method | |
| CN103143552B (en) | Recycling harmless comprehensive treating method for kitchen garbage | |
| CN102268310A (en) | Method for preparing biomass fuel by utilizing food wastes | |
| CN101585044A (en) | Food waste acidifying hydrolysis treatment method | |
| CN207929755U (en) | A kind of restaurant garbage treating system | |
| CN108889767B (en) | Kitchen waste treatment system and utilization method | |
| CN108031697A (en) | A kind of kitchen, method for processing kitchen waste | |
| CN102671918B (en) | Biochemical treating system for kitchen garbage | |
| CN109332366B (en) | Kitchen waste treatment system and method | |
| CN111440707A (en) | Dry type anaerobic fermentation treatment system for mixed garbage | |
| CN116213403A (en) | Whole-process treatment system and method for insect belly-passing transformation of kitchen waste | |
| CN208747901U (en) | A kind of organic solid castoff processing equipment for recycling | |
| CN210261487U (en) | Municipal administration sludge treatment device | |
| CN113145609B (en) | Sequencing batch type pretreatment system and method for anaerobic digestion of high-solid-content kitchen garbage | |
| CN112430159A (en) | System for preparing granulated fertilizer by anaerobic digestion of biogas residues by kitchen waste dry method and operation process | |
| CN111515223A (en) | Continuous wet garbage biochemical decrement device | |
| CN215403931U (en) | Regional organic waste coprocessing system | |
| CN216273827U (en) | Powder fertilizer manufacturing system based on dry anaerobic biogas residue three-stage dehydration | |
| CN209094147U (en) | The sundries and percolate of kitchen castoff separate and disposal plant | |
| CN111153726A (en) | Pit mud impurity removal and drying process method and system | |
| CN111170585A (en) | Fermentation system and fermentation method for livestock and poultry manure recycling treatment engineering | |
| CN114472463B (en) | System for cooperatively treating kitchen waste by using cement kiln and treatment method thereof | |
| CN113728980A (en) | Method for cooperatively treating wet garbage | |
| CN108704923A (en) | Kitchen castoff processing system | |
| CN107983751A (en) | A kind of kitchen（Food waste）Rubbish separating dry space from moist space pulping process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |