CN115026097A - Kitchen organic slurry treatment process - Google Patents
Kitchen organic slurry treatment process Download PDFInfo
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- CN115026097A CN115026097A CN202210788755.7A CN202210788755A CN115026097A CN 115026097 A CN115026097 A CN 115026097A CN 202210788755 A CN202210788755 A CN 202210788755A CN 115026097 A CN115026097 A CN 115026097A
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- 239000002002 slurry Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 37
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- 239000012535 impurity Substances 0.000 claims abstract description 45
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Classifications
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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
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
-
- 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
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/35—Shredding, crushing or cutting
-
- 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
- B09B3/60—Biochemical treatment, e.g. by using enzymes
- B09B3/65—Anaerobic treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/70—Kitchen refuse; Food waste
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kitchen organic slurry treatment process, which separates kitchen waste through a material receiving device, a sorting machine, a first fine-separation pulping machine, a first sand-water separator, a second fine-separation pulping machine, a second sand-water separator, an impurity removal separator, a centrifugal device and an oil storage tank which are connected in sequence. The separation method specifically comprises primary rough separation, fine separation pulping, sand removal, impurity removal and oil-water separation. Through the kitchen organic slurry treatment process provided by the invention, impurities in the materials can be removed, and the materials can be separated into water, oil and residues for subsequent treatment.
Description
Technical Field
The invention belongs to the technical field of garbage treatment, and particularly relates to a kitchen organic slurry treatment process.
Background
At present, apart from two major harmless treatment processes of landfill and incineration, biochemical treatment and resource utilization are mainly used for independently treating kitchen garbage, and the biochemical treatment mainly comprises two major treatment processes of anaerobic digestion and aerobic composting. Compared with the traditional aerobic composting process, the anaerobic digestion is carried out in a closed environment, the environmental influence is relatively small, and the anaerobic digestion has great advantages on the influence of the surrounding environment and the utilization of the final product, thereby representing the mainstream development direction at present.
Because the anaerobic digestion technology only acts on organic matters, and the kitchen waste is a mixture of the organic matters and the non-biodegradable impurities, a kitchen waste pretreatment system needs to be configured to separate the organic matters from the non-biodegradable materials influencing the anaerobic digestion treatment. Current pretreatment technologies are classified into mechanical sorting and mechanical pulping technologies.
The pretreatment technology in the prior art is only simple separation and pulping, can not effectively separate solid slag and organic materials which cannot be separated, and organic matters are usually taken away and discarded during screening, so that the recovery rate is extremely low.
Disclosure of Invention
The invention aims to provide a kitchen organic slurry treatment process, which can overcome the defects of the prior art, not only can prevent the loss of organic matters, but also can effectively separate impurities in kitchen waste, make the kitchen waste into slurry, ensure the stable and efficient operation of a treatment system, and can separate the materials into water, oil and slag to facilitate subsequent treatment and recovery.
In order to achieve the purpose, the invention provides a kitchen organic slurry treatment process, which comprises the steps of separating kitchen waste through a material receiving device, a sorting machine, a first fine-classification pulping machine, a first sand-water separator, a second fine-classification pulping machine, a second sand-water separator, an impurity removal separator, a centrifugal device and an oil storage tank which are sequentially connected, wherein the centrifugal device comprises a horizontal centrifuge, a vertical centrifuge, a fourth collecting tank, a fifth collecting tank and a sixth collecting tank;
the separation process comprises primary rough separation, fine separation pulping, sand removal, impurity removal and oil-water separation;
wherein, first grade rough separation specifically includes: crushing the kitchen waste by adopting a sorting machine in a mechanical forced separation mode, and conveying particles with the particle size of more than 60mm to a slag discharging room;
the finely divided pulping specifically comprises: selecting the particles with the particle size of less than 60mm remained after the primary rough separation by a first fine pulp making machine, and separating plastics, fabrics and hard inorganic substances in the kitchen waste; pulping the separated kitchen waste to prepare organic coarse slurry, and adjusting the solid content of the organic coarse slurry through a second fine-separation pulping machine after the organic coarse slurry is separated by a first sand-water separator;
the oil-water separation specifically comprises: separating grease, a water phase and a solid phase from the kitchen waste by a horizontal centrifugal machine and a vertical centrifugal machine, collecting the grease by an oil storage tank, recycling the water phase, and carrying out anaerobic fermentation treatment on the solid phase.
Furthermore, a first shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor are sequentially arranged between the sorting machine and the slag discharging room, a fourth shaftless screw conveyor is arranged between the sorting machine and the fine dividing machine, and the first fine dividing pulping machine is connected with the second shaftless screw conveyor through a fifth shaftless screw conveyor and a sixth shaftless screw conveyor.
Furthermore, plastics, fabrics and hard inorganic matters in the kitchen waste separated by the first fine-sizing pulper are conveyed to a slag discharge room through a fifth shaftless screw conveyor, a sixth shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor in sequence.
Further, the sand removing process comprises the steps of separating heavy substances in the slurry by using a sand-water separator II and conveying the separated heavy substances to a shaftless screw conveyor V for subsequent treatment; the heavy material has a specific gravity of more than 2000kg/m 3 Impurity gravel of (1).
Preferably, the heavy materials are shells, glass, tiles or gravel, and the heavy materials are separated to prevent the heavy materials from damaging pumps, pipelines and other equipment and from settling and depositing in a tank of a subsequent anaerobic digestion system.
Further, the impurity removal process comprises the following steps: collecting the slurry treated by the sand-water separator II in a water collecting tank II, and removing fine and light drifts in the slurry by an impurity removing separator to reduce the content of inorganic interferents in the slurry;
the fine light drifter comprises wood fiber, fine plastic and pepper seed.
And further, temporarily storing the slurry after impurity removal in a third water collecting tank, and conveying the slurry to a horizontal centrifuge for separation.
Further, the receiving device receives the kitchen waste, intensively collects the residual percolate in the kitchen waste and conveys the percolate to a first water collecting tank, and conveys the percolate to a sorting machine for sorting treatment.
Furthermore, the water collecting tank and the recycled water phase can be conveyed to the fine pulping machine for use.
In summary, the invention has the following advantages:
1. the invention realizes the process flow and industrialization of kitchen waste treatment, and can improve the treatment efficiency by matching with a specific instrument.
2. The invention can realize high-precision separation of water phase, oil phase and slag in the kitchen waste; the yield of the biological anaerobic degradation product and the yield of the oil phase are high, and the recycling rate of the kitchen waste is high; the purity of the water phase is high, which is beneficial to the stability of a subsequent anaerobic system; the operation cost is low, and a key technical support is provided for full resource utilization of garbage.
Drawings
FIG. 1 is a schematic process flow diagram of example 1;
FIG. 2 is a schematic process flow diagram of example 2.
Detailed Description
The receiving device in the invention is preferably a structure with a receiving hopper and a bottom feeding screw conveyor, wherein the volume of the hopper is more than or equal to 20m 3 And the processing capacity is more than or equal to 10 t/h. The material receiving device has the main functions of material receiving, draining, material homogenizing and the like, adopts a hydraulic motor for driving a shaftless screw, realizes stepless speed regulation, adopts a positive and negative rotation anti-blocking design and has reliable performance. Has the advantages of wear resistance, corrosion resistance, difficult winding, difficult slag bonding and difficult locking. Connect material funnel bottom spiral all to be equipped with the screen cloth that leaks, can concentrate the residual infiltration liquid in the kitchen discarded object through the waterlogging caused by excessive rainfall fill of connecing material funnel bottom and collect and send No. one catch basin to, reduce the content of the liquid organic matter in the debris.
Preferably, the receiving hopper is provided with an automatic top cover, the receiving hopper is tightly sealed, the receiving hopper can be closed to prevent odor from overflowing when not discharging, the upper part of the receiving hopper is provided with a gas collecting cover and a deodorizing flange opening, and two sets of infrared quick-induction rolling doors are arranged, so that the discharging function in a closed space of a vehicle is realized.
The processing capacity of the sorting machine is more than or equal to 10t/h, a power mode of hydraulic transmission is adopted, the sorting machine has the functions that plastic packaging bags in materials are torn and scattered in a mechanical forced poking and separating mode, sundries with the particle size of more than 60mm are separated out of the sorting system, and the sorted non-nutritive sundries with large particle sizes comprise light materials such as plastic bags, rags, bamboo chopsticks and paper shells, and hard sundries such as glass bottles, magnetic disks, large metal articles and the like which are easy to influence the subsequent processes and other unpredictable sundries are conveyed to a slag outlet for outward transportation through a first shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor.
The fine pulping machine comprises the functions of crushing and screening, and has the functions as follows: and conveying the homogenized material sorted by the sorting machine to a first fine sorting pulp making machine by a fourth shaftless screw conveyor, and finely sorting the kitchen materials. The method can be used for separating inorganic matters such as metal and the like, such as plastics, fabrics and hard unbreakable inorganic matters in the food and beverage waste again to separate out the seafood hard substance impurities such as metal, plastics, bamboo, wood, ceramics, glass bottles, bottle caps, chopsticks, bones, shells and the like in the food and beverage waste. And simultaneously, pulping food residues in the catering waste to generate organic coarse slurry mainly containing pulp materials, and treating the organic coarse slurry in a subsequent system. The fine-separation pulping machine has the advantages that sundries are sorted cleanly, the fine-separation pulping effect of organic matters is good, the crushing grain size is smaller than or equal to 5mm, the pulp with the grain size smaller than or equal to 3mm accounts for 90% of the total amount of the pulp, and the biogas production rate of a subsequent anaerobic system is greatly improved. Meanwhile, the system is provided with a spray pipe, so that water can be automatically supplemented according to subsequent process requirements, the solid content of the slurry can be adjusted, and the requirements of back-end sand removal and anaerobic fermentation can be matched.
The sand removing device comprises two sand-water separators, including a first sand-water separator and a second sand-water separator. The processing capacity is more than or equal to 20t/h, and the functions are as follows: the specific gravity of the organic slurry for removing heavy substances (shells, glass, ceramics, gravels and the like) is more than 2000kg/m 3 The impurity gravel of (1). Prevent the oil-water separator from damaging equipment such as a horizontal centrifuge and a vertical centrifuge, a pump, a pipeline and the like, and prevent the sedimentation and sedimentation in a tank body of an anaerobic digestion system.
The impurity removal separator has the processing capacity of more than or equal to 20t/h, and the material contact part is made of SUS 304. The functions are as follows: the impurity removal and separation system is mainly used for separating and removing non-nutritional fine-fragment light drifts such as wood fibers, fine-fragment plastics and pepper seeds which interfere the oil extraction system and the anaerobic fermentation system and are continuously remained in the slurry after sand removal, so that the content of inorganic interference substances in the slurry is reduced to the minimum, the blockage interference of the light drifts on a delivery pump body and oil extraction equipment is prevented, and the phenomenon that the anaerobic fermentation system crusts due to excessive light drifts and influences the production efficiency and the operation safety of methane is avoided.
The processing capacity of the horizontal centrifuge is 8-10t/h, and the oil in the kitchen waste can be effectively separated by adopting a variable-frequency speed-regulating power mode, so that the recovery and utilization rate of the oil is improved. The processing capacity of the vertical centrifuge is 2t/h, and the process crude oil with the water content of less than or equal to 3 percent can be obtained by adopting a power mode of variable frequency speed regulation.
In order to cooperate with the process of the invention, it can be understood that the invention should be matched with a hydraulic station, the volume of which can be 800L, and a sorting machine and a receiving device to provide hydraulic power. And an air cooling mode is adopted.
The principles and features of this invention are described below in conjunction with embodiments, which are included to explain the invention and not to limit the scope of the invention. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The embodiment provides a kitchen organic slurry treatment process, which comprises primary rough separation, fine pulping, sand removal, impurity removal and oil-water separation. The device comprises a material receiving device, a sorting machine, a shaftless screw conveyor, a fine sizing machine, a sand-water separator, a water collecting tank, an impurity removing separator, a horizontal centrifuge, a vertical centrifuge, a homogenizing adjusting tank, an anaerobic fermentation tank, a grease buffer tank, an oil tank and the like. Wherein sand water separator includes sand water separator and sand water separator No. two, and the catch basin is provided with 6, and shaftless screw conveyer is provided with 9, and the smart pulping machine that divides is provided with 2.
In this embodiment, the connection relationship and the process flow are shown in fig. 1.
S1 the kitchen waste is firstly received and screened by the receiving device, the kitchen waste is washed by washing water, residual leachate in the kitchen waste is collected into a first water collecting tank (1 # in the figure of the invention refers to a first number, and similarly, 2# refers to a second number), and the kitchen waste can be further used for preparing slurry in a fine-separation pulping machine.
S2 the dry solid material processed by the receiving device is further torn and scattered by a sorting machine in a forced pull-off sorting mode, coarse impurities (i.e. impurities with the particle size larger than 60 mm) are separated out of the system and conveyed to a slag discharging room for outward transportation through a first shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor.
S3 the kitchen garbage with small particle impurities after being processed by the sorting machine is conveyed to a first fine-sorting pulp making machine through a fourth shaftless screw conveyor, the screened inorganic impurities and the like are conveyed to a second shaftless screw conveyor through a fifth shaftless screw conveyor and a sixth shaftless screw conveyor, and the mixture is conveyed to a slag discharging room for further processing. And adding the residual kitchen waste into the wastewater from the first water collecting tank for pulping to prepare organic coarse pulp.
S4 the organic coarse pulp is conveyed to a sand-water separator by a No. seven shaftless screw conveyor, after heavy materials are removed, the heavy materials are conveyed to a slag discharge room for treatment by the No. one shaftless screw conveyor, the rest pulp enters a No. two fine pulp making machine for continuous pulping treatment, and the solid content in the pulp is adjusted to match the requirements of back-end sand removal and anaerobic fermentation.
S5, conveying the slurry to a second sand-water separator for further fine separation by an eighth shaftless screw conveyor, conveying impurities such as gravel to a slag discharge room for treatment by a fifth shaftless screw conveyor, a sixth shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor, and further separating solid impurities in the kitchen waste.
S6 the serous fluid processed by the sand-water separator is collected and arranged in a water collecting tank II, and then processed by an impurity removing separator to remove wood fiber, fine plastic, pepper seed and other non-nutritive fine broken light drifts which interfere the oil extraction system and the anaerobic fermentation system, and the impurities are conveyed to a slag discharging room by a shaftless screw conveyor I, a shaftless screw conveyor II and a shaftless screw conveyor III for processing.
And S7, continuously conveying the slurry treated by the impurity removal separator to a third collecting tank for collection and treatment, and then carrying out three-phase separation by a horizontal centrifuge, wherein the water phase enters the fourth collecting tank and then enters a fine pulp making machine as reuse water for pulping. The solid phase is conveyed to the No. six water collecting tank by the No. nine shaftless spiral conveyor, and the solid phase is organic matter, can be conveyed to an anaerobic fermentation tank for producing biogas, biogas slurry and biogas residues after being homogenized by the homogenizing adjusting tank, and improves the conversion rate. And after the oil phase enters a fifth water collecting tank for storage, the oil phase continues to enter a vertical centrifuge for three-phase separation, wherein the solid phase enters a sixth water collecting tank for subsequent anaerobic treatment in the same way, the water phase enters a fourth water collecting tank for water treatment, and the oil phase sequentially enters an oil buffer tank and an oil tank for collection treatment.
In the method, nondegradable solid impurities, degradable organic matters and the like in the kitchen waste can be effectively separated, and meanwhile, the separated water phase can be recycled, so that water resources are saved; the separated organic matter is processed for subsequent methane production, the conversion rate is improved, and the undegradable solid impurities are sent to a slag discharging room for processing.
Example 2
The embodiment provides a kitchen organic slurry treatment process, which comprises primary rough separation, fine pulping, sand removal, impurity removal and oil-water separation. The device comprises a material receiving device, a sorting machine, a shaftless screw conveyor, a fine-separation pulping machine, a sand-water separator, a water collecting tank, an impurity removing separator, a horizontal centrifuge, a vertical centrifuge, a homogenizing adjusting tank, an anaerobic fermentation tank, a grease cache tank, an oil tank and the like. Wherein sand water separator includes sand water separator and sand water separator No. two, and the catch basin is provided with 6, and shaftless screw conveyer is provided with 9, and the smart pulping machine that divides is provided with 2.
In this embodiment, the connection relationship and the process flow are shown in fig. 2.
S1 the kitchen waste is firstly received and screened by the receiving device, wherein residual leachate in the kitchen waste is collected into a first collecting tank (1 # in the figure of the invention refers to the first, and similarly, 2# refers to the second), and flushing water and the like can also be collected into the first collecting tank, and further can be used for preparing slurry in a fine-sizing pulper.
S2 the dry solid material processed by the receiving device is further torn and scattered by a sorting machine in a forced pull-off sorting mode, coarse impurities (i.e. impurities with the particle size larger than 60 mm) are separated out of the system and conveyed to a slag discharging room for outward transportation through a first shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor.
S3 the kitchen garbage with small particle impurities after being processed by the sorting machine is conveyed to a first fine-sorting pulp making machine through a fourth shaftless screw conveyor, the screened inorganic impurities and the like are conveyed to a second shaftless screw conveyor through a fifth shaftless screw conveyor and a sixth shaftless screw conveyor, and the mixture is conveyed to a slag discharging room for further processing. And adding the residual kitchen waste into the wastewater from the first water collecting tank for pulping to prepare organic coarse pulp.
S4 the organic coarse pulp is conveyed to a sand-water separator by a No. seven shaftless screw conveyor, after heavy materials are removed, the heavy materials are conveyed to a slag discharge room for treatment by the No. one shaftless screw conveyor, the remaining pulp enters a No. two fine pulp making machine for continuous pulping treatment, and the solid content in the pulp is adjusted to match the requirements of back-end sand removal and anaerobic fermentation.
S5 slurry is conveyed to a sand-water separator II through an eight-shaft-free screw conveyor for further fine separation, impurities such as gravel are conveyed to a slag discharging room for treatment through a five-shaft-free screw conveyor, a six-shaft-free screw conveyor, a two-shaft-free screw conveyor and a three-shaft-free screw conveyor, and solid impurities in the kitchen waste are further separated.
S6 the serous fluid processed by the sand-water separator is collected and arranged in a water collecting tank II, and then processed by an impurity removing separator to remove wood fiber, fine plastic, pepper seed and other non-nutritive fine broken light drifts which interfere the oil extraction system and the anaerobic fermentation system, and the impurities are conveyed to a slag discharging room by a shaftless screw conveyor I, a shaftless screw conveyor II and a shaftless screw conveyor III for processing.
And S7, continuously conveying the slurry treated by the impurity removal separator to a third collecting tank for collection and treatment, and then carrying out three-phase separation by a horizontal centrifuge, wherein the water phase enters the fourth collecting tank and then enters a fine pulp making machine as reuse water for pulping. The solid phase is conveyed to the No. six water collecting tank by the No. nine shaftless spiral conveyor, and the solid phase is organic matter, can be conveyed to an anaerobic fermentation tank for producing biogas, biogas slurry and biogas residues after being homogenized by the homogenizing adjusting tank, and improves the conversion rate. And after the oil phase enters a fifth water collecting tank for storage, the oil phase continues to enter a vertical centrifuge for three-phase separation, wherein the solid phase enters a sixth water collecting tank for subsequent anaerobic treatment in the same way, the water phase enters a fourth water collecting tank for water treatment, and the oil phase sequentially enters an oil buffer tank and an oil tank for collection treatment.
No. four catch basins in this embodiment can communicate with No. six catch basins, when No. four catch basins water yield is too big, when surpassing the demand of retrieval and utilization and storage, can overflow No. six catch basins. Meanwhile, the water phase of the No. six water collecting tank can be used in a vertical centrifuge for further separation and purification.
By using the kitchen organic slurry treatment process provided by the invention and matching with various instruments, the whole process flow can be industrialized, and the effect of comprehensive treatment is achieved. Meanwhile, high-precision separation of water phase, oil phase and slag in the kitchen waste can be realized; the yield of the biological anaerobic degradation product and the yield of the oil phase are high, and the recycling rate of the kitchen waste is high; the purity of the water phase is high, which is beneficial to the stability of a subsequent anaerobic system; the operation cost is low, and a key technical support is provided for the full resource utilization of the garbage.
While the present invention has been described in detail with reference to the specific embodiments thereof, it should not be construed as limited by the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (8)
1. A kitchen organic slurry treatment process is characterized in that kitchen waste is separated through a material receiving device, a sorting machine, a first fine-separation pulping machine, a first sand-water separator, a second fine-separation pulping machine, a second sand-water separator, an impurity removal separator, a centrifugal device and an oil storage tank which are connected in sequence, wherein the centrifugal device comprises a horizontal centrifuge, a vertical centrifuge, a fourth water collecting tank, a fifth water collecting tank and a sixth water collecting tank, a water inlet and a water outlet of the fifth water collecting tank are respectively connected with an oil outlet of the horizontal centrifuge and a water inlet of the vertical centrifuge, the fourth water collecting tank is connected with water outlets of the horizontal centrifuge and the vertical centrifuge, and the sixth water collecting tank is connected with a slag outlet of the horizontal centrifuge and a slag outlet of the vertical centrifuge;
the separation process comprises primary rough separation, fine separation pulping, sand removal, impurity removal and oil-water separation;
wherein, the first-level rough separation specifically comprises: crushing the kitchen waste by adopting a sorting machine in a mechanical forced separation mode, and conveying particles with the particle size of more than 60mm to a slag discharging room;
the fine pulping specifically comprises the following steps: selecting the particles with the particle size of less than 60mm remained after the primary rough separation by a first fine pulp making machine, and separating plastics, fabrics and hard inorganic substances in the kitchen waste; pulping the separated kitchen waste to prepare organic coarse slurry, and adjusting the solid content of the organic coarse slurry through a second fine-separation pulping machine after the organic coarse slurry is separated by a first sand-water separator;
the oil-water separation specifically comprises: grease, aqueous phase and solid phase among the kitchen garbage are separated out through horizontal centrifuge and vertical centrifuge, the grease is collected through the oil storage tank, the aqueous phase is retrieved and is used, anaerobic fermentation is handled to the solid phase.
2. The kitchen organic slurry treatment process according to claim 1, wherein a first shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor are sequentially arranged between the sorting machine and the slag discharge room, a fourth shaftless screw conveyor is arranged between the sorting machine and the refiner, and the first refiner pulping machine and the second shaftless screw conveyor are connected through a fifth shaftless screw conveyor and a sixth shaftless screw conveyor.
3. The kitchen organic slurry treatment process according to claim 2, characterized in that the plastic, fabric and hard inorganic matters in the kitchen waste separated by the first refiner are conveyed to a slag discharge room by a fifth shaftless screw conveyor, a sixth shaftless screw conveyor, a second shaftless screw conveyor and a third shaftless screw conveyor in sequence.
4. The kitchen organic slurry treatment process according to claim 2, wherein the desanding process comprises separating heavy substances in the slurry by using a sand-water separator II and conveying the slurry to a shaftless screw conveyor V for subsequent treatment;
the heavy material has a specific gravity of more than 2000kg/m 3 The impurity gravel of (1).
5. The kitchen organic slurry treatment process according to claim 4, wherein the impurity removal process comprises: collecting the slurry treated by the sand-water separator II in a water collecting tank II, and removing fine and light drifts in the slurry by an impurity removing separator to reduce the content of inorganic interferents in the slurry;
the fine light drifter comprises wood fiber, fine plastic and pepper seeds.
6. The kitchen organic slurry treatment process according to claim 1 or 5, wherein the slurry after impurity removal is temporarily stored in a third collecting tank and then conveyed to a horizontal centrifuge for separation.
7. The kitchen organic slurry treatment process according to claim 1, wherein the material receiving device receives kitchen waste, intensively collects leachate remaining in the kitchen waste and conveys the leachate to a first water collecting tank, and conveys the leachate to a sorting machine for sorting treatment.
8. The kitchen organic slurry treatment process according to claim 7, wherein both the first collecting tank and the recycled water phase can be conveyed to the first refiner for use.
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