CN114853267B - Efficient oil extraction and capacity system for kitchen waste - Google Patents
Efficient oil extraction and capacity system for kitchen waste Download PDFInfo
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- CN114853267B CN114853267B CN202210428366.3A CN202210428366A CN114853267B CN 114853267 B CN114853267 B CN 114853267B CN 202210428366 A CN202210428366 A CN 202210428366A CN 114853267 B CN114853267 B CN 114853267B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/104—Carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The invention discloses a high-efficiency oil extraction and capacity generation system for kitchen waste, which comprises a pretreatment mechanism, an oil separation tank, a three-phase separator and CO 2 Supercritical extraction device, anaerobic fermentation mechanism, marsh gas purification mechanism, marsh liquid processing mechanism and marsh sediment processing mechanism, through CO 2 The supercritical extraction device efficiently removes grease in waste residues generated after the kitchen waste is subjected to filter pressing, so that the grease in the solid residues of the kitchen waste is recovered, the stable operation of subsequent anaerobic fermentation is further maintained, the gas yield is improved, and the treatment of the kitchen waste is recycled and harmless to the greatest extent.
Description
Technical Field
The invention relates to the technical field of kitchen waste oil removal, in particular to a high-efficiency oil extraction and capacity system for kitchen waste.
Background
The content of grease in kitchen waste is high, generally 30% -40%, the content of grease is too high, the activity of anaerobic digestion microorganisms can be inhibited, the gas production rate is reduced, and the mass fraction of methane in methane is also reduced.
Disclosure of Invention
The invention aims to provide a high-efficiency oil extraction and capacity system for kitchen waste, which solves the problems of the prior art, solves the problems of high grease content and influence on the gas production rate of anaerobic digestion of the kitchen waste at present, and achieves the aims of green emission reduction while improving economic benefit by adopting the technology of removing grease in solid phase through gravity degreasing, three-phase separation degreasing and supercritical extraction.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a high-efficiency oil extraction and capacity generation system for kitchen waste, which comprises a pretreatment mechanism, an oil separation tank, a three-phase separator, a CO2 supercritical extraction device, an anaerobic fermentation mechanism, a biogas purification mechanism, a biogas slurry treatment mechanism and a biogas residue treatment mechanism,
the pretreatment mechanism comprises a receiving hopper, a sorting machine and a pulping machine, wherein kitchen waste is heated in the receiving hopper, then enters the sorting machine to sort out coarse impurities, and then enters the pulping machine to prepare slurry;
the kitchen waste slurry treated by the pretreatment mechanism enters an oil separation tank, the oil separation tank is used for removing grease in an oil-water mixture, and a solid-liquid mixture deposited at the bottom of the oil separation tank enters a three-phase separator for further separation;
waste water separated from the three-phase separator enters an anaerobic fermentation mechanism, and separated waste residues enter the anaerobic fermentation mechanism after grease is removed by a CO2 supercritical extraction device; the anaerobic fermentation mechanism is connected with the biogas purification mechanism and the biogas slurry treatment mechanism, the biogas purification mechanism is used for heating the butt joint hopper, and CO2 separated from the biogas purification mechanism is used for supplementing CO2 to the CO2 supercritical extraction device; the biogas slurry treatment mechanism is used for treating wastewater and enabling the wastewater to reach the discharge standard; the biogas residue treatment mechanism is used for dehydrating biogas residues, and the biogas residues enter a sewage treatment system from a liquid phase after solid-liquid separation and are subjected to solid-phase composting.
Preferably, the oil removal is carried out by adopting a gravity oil outlet mode, the structure of the oil removal tank adopts a advection type, the oil removal tank is connected with the oil storage tank, and the oil removed in the oil removal tank enters the oil storage tank through the oil collecting pipe.
Preferably, the three-phase separator is connected with the grease storage tank, and grease separated by the three-phase separator enters the grease storage tank through the oil collecting pipe.
Preferably, the CO2 in the CO2 supercritical extraction device is liquid under the supercritical state with the temperature of 31 ℃ and the pressure of 7.3MPa, the waste residue containing grease and the liquid CO2 are mixed and enter an extraction kettle, the temperature of more than 40 ℃ and the pressure of less than 50MPa are regulated, the liquid CO2 can separate the grease from the waste residue, and the liquid CO2 is restored to CO2 gas in the subcritical state through temperature change or pressure change, so that the grease can be separated out, the separated grease enters a grease storage tank, and the CO2 enters the CO2 supercritical extraction device again for recycling.
Preferably, the anaerobic fermentation mechanism adopts an internal circulation anaerobic reactor, the internal circulation anaerobic reactor is formed by connecting 2 layers of UASB reactors in series, waste water flows in the reactor from bottom to top, bacteria adsorb and degrade organic matters, and purified water flows out of the upper part of the reactor.
Preferably, the biogas purifying mechanism comprises a biogas tank, a dry desulfurization tank and a deep dehydration device, wherein biogas generated by anaerobic digestion firstly enters the biogas tank, then enters the dry desulfurization tank to remove H2S in the biogas by ferric oxide, and then is dehydrated by the deep dehydration device.
Preferably, the biogas slurry treatment mechanism is an MBR system, the MBR system comprises a biochemical reactor and an external ultrafiltration, the biochemical reactor comprises a denitrification tank and a nitrification tank, the nitrification tank is used for degrading organic pollutants in sewage, the denitrification tank is used for denitrification, and the external ultrafiltration is used for filtering and separating microbial thalli.
Preferably, the biogas residue treatment mechanism adopts a spiral-fold type sludge dewatering machine.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention adopts CO 2 The supercritical extraction device carries out supercritical extraction on grease in waste residue after three-phase separation treatment, improves the grease removal rate of the whole system of kitchen waste, ensures that the whole system operates more stably, can utilize waste gas generated by the system, and reduces the operation costThe method improves economic benefit, reduces carbon emission and makes a certain contribution to the 'double carbon' target.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a workflow diagram of an efficient oil and energy extraction system for kitchen waste.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a high-efficiency oil extraction and capacity system for kitchen waste, which solves the problems of the prior art, solves the problems of high grease content and influence on the gas production rate of anaerobic digestion of the kitchen waste at present, and achieves the aims of green emission reduction while improving economic benefit by adopting the technology of removing grease in solid phase through gravity degreasing, three-phase separation degreasing and supercritical extraction.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the embodiment provides a high-efficiency oil extraction and capacity system for kitchen waste, which is mainly technically characterized in that grease in kitchen waste liquid and grease in waste residues after filter pressing are efficiently removed through a series of oil removal processes, so that the gas yield of the system is improved, waste gas is utilized, and the benefits are improved while the environment-friendly low-carbon environment is realized.
The pretreatment mechanism comprises a kitchen waste pretreatment mechanism, an oil separation tank, a three-phase separator and CO 2 Supercritical extraction device, anaerobic fermentation mechanism, marsh gas purification mechanism, marsh liquid processing mechanism, marsh slag processing mechanism etc.. The pretreatment mechanism comprises a receiving hopper, a sorting machine, a pulping machine and the like, kitchen waste is heated in the receiving hopper, grease can be separated efficiently, then the kitchen waste enters the sorting machine to sort out coarse impurities such as metal, plastic and the like, and the coarse impurities enter the pulping machine to prepare slurry for subsequent treatment; removing part of grease in the oil-water mixture by utilizing a natural floating method in the oil separation tank, depositing the deposited solid-liquid mixture at the bottom, and then entering a three-phase separator for further separation; oil, water and slag in the three-phase separator are separated, waste water enters an anaerobic fermentation mechanism, and waste slag further passes through CO 2 The supercritical extraction device removes the residual grease and then carries out an anaerobic fermentation mechanism; CO 2 CO utilization in supercritical extraction apparatus 2 The unique dissolving capacity in the supercritical state separates the grease from the mixture, and the supercritical fluid is recovered to the subcritical state to be separated from the grease through temperature change or pressure change; the anaerobic fermentation mechanism refers to an IC anaerobic reactor, kitchen waste liquid after three-phase separation and waste residue after extraction enter the anaerobic reactor for anaerobic digestion, organic matters are removed, poison in the waste water is diluted, and the concentration of the discharged water VFA is reduced; methane H is reduced in methane purification mechanism 2 S content, reducing corrosion of methane to subsequent equipment, wherein part of the methane is used for heating a butt joint hopper, and CO separated from the methane 2 Can be used for CO 2 Supplementing the supercritical extraction device; ammonia nitrogen and COD in the wastewater are removed by an MBR system process in the biogas slurry treatment mechanism, so that the wastewater reaches the discharge standard; the biogas residue treatment mechanism is used for dehydrating the biogas residue, the liquid phase enters a sewage treatment system after solid-liquid separation, and the solid phase is used for composting.
The system has the kitchen waste grease content of 30-40%, and the grease removal rate of the kitchen waste after treatment reaches 95-99%.
The pretreatment mechanism comprises a receiving hopper, a sorting machine and a pulping machine, wherein the receiving hopper is heated, then the receiving hopper is fed into the sorting machine to sort out coarse impurities such as metal, plastic and the like, the sorted garbage is fed into the pulping machine to be made into slurry, and then the materials are fed into an oil separation tank to be subjected to gravity oil removal.
The oil separation tank is characterized in that the oil separation tank is designed to achieve the purpose of separation by utilizing different specific gravities of suspended grease and water in wastewater, the structure of the oil separation tank adopts a horizontal flow type, a kitchen oil-water mixture enters the oil separation tank with a rectangular plane through a water distribution tank, slowly flows along the horizontal direction, the grease floats upwards in the flowing process, flows into a grease storage tank through a grease collecting pipe, heavy oil and other mixtures deposited in the oil separation tank are accumulated at the bottom of the tank and enter a three-phase separator, and the grease removal rate can reach 60% -70%
The three-phase separator separates solid phase, liquid phase and grease in the material, the grease removal rate can reach more than 90%, wherein the liquid phase enters the anaerobic fermentation mechanism, the grease enters the grease storage tank, and the solid phase enters CO 2 The supercritical extraction device performs supercritical extraction to further remove the oil in the waste residue.
CO 2 Supercritical extraction device, CO 2 Is liquid in supercritical state (31deg.C, 7.3 MPa), and contains oil residue and liquid CO 2 Mixing the materials, adding into extraction kettle, regulating temperature (higher than 40deg.C) and pressure (lower than 50 MPa), and adding liquid CO 2 Can separate grease from waste residue, and then make liquid CO through temperature change or pressure change 2 Recovery to subcritical state (CO) 2 Gas), the grease can be separated out, and the separated grease enters a grease storage tank and CO 2 The oil enters the extraction device again for recycling, continuous operation is realized, the extraction rate can reach 70% -90%, and the oil removal rate can reach 95% -99% through the device.
Anaerobic fermentation mechanism refers to IC anaerobic reactor, namely inner circulation anaerobic reactor, is formed by connecting 2 layers of UASB reactors in series, waste water flows from bottom to top in the reactor, bacteria adsorb and degrade organic matters, purified water flows out from the upper part of the reactor, SS can not be accumulated in the reactor, the concentration of effluent VFA is low, the influence of grease on anaerobic digestion can be reduced, the purity of produced biogas is high, and biogas generated by the reactor can be used as power to drive inner circulation, so that power consumption is saved.
The biogas purifying mechanism comprises a biogas tank, a dry method desulfurization tank and a deep dehydration device, wherein biogas generated by anaerobic digestion firstly enters the biogas tank, the biogas tank plays a role in stabilizing pressure due to fluctuation of biogas yield of the fermentation tank, and then the biogas enters the dry method desulfurization tank to remove H in the biogas by ferric oxide 2 S, dehydrating by using a deep dehydration device, wherein part of methane can be used for heating kitchen waste to separate grease, and CO separated from methane 2 Can be used for CO 2 The supercritical extraction device supplements raw materials to make the waste gas utilized.
The biogas slurry treatment mechanism is an MBR system, and consists of a biochemical reactor and an external ultrafiltration system, wherein the biochemical reactor consists of a denitrification tank and a nitrification tank, most of organic pollutants in sewage are degraded in the nitrification tank under the action of aerobic microorganisms, denitrification is carried out in the denitrification tank, the removal rate of ammonia nitrogen in the reactor is over 99 percent, and microbial thalli are separated from effluent through the high-efficiency ultrafiltration system, so that particles, microorganisms and suspended matters related to COD (chemical oxygen demand) of more than 20nm are safely trapped in the system.
In the biogas residue treatment mechanism, the stacked spiral sludge dewatering machine is used, the screw extrusion principle is applied, the strong extrusion force generated by the change of the screw diameter and the screw pitch and the tiny gap between the movable ring and the fixed ring are utilized, the novel solid-liquid separation equipment for extrusion dewatering of biogas residues is realized, and composting treatment can be carried out after biogas residue treatment, so that the kitchen waste treatment recycling is achieved.
The invention uses CO 2 The supercritical extraction device efficiently removes grease in waste residues generated after the kitchen waste is subjected to filter pressing, so that the grease in the solid residues of the kitchen waste is recovered, the stable operation of subsequent anaerobic fermentation is further maintained, the gas yield is improved, and the treatment of the kitchen waste is recycled and harmless to the greatest extent. The high-efficiency kitchen waste oil removing system is technically characterized in that after kitchen waste is subjected to gravity oil removing and three-phase separator treatment, filter residues still contain part of grease, and if anaerobic fermentation is directly carried out, the gas production rate is affected, and the system adopts CO 2 Supercritical extraction deviceThe method extracts the grease from the waste residue and then carries out anaerobic fermentation, thereby not only improving the grease yield, but also improving the running stability of the whole process, and CO generated by anaerobic fermentation 2 Can also be used for CO 2 The supercritical extraction device is supplemented, so that carbon emission is reduced, and contribution is made to a double-carbon target.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. A high-efficient oil extraction productivity system for kitchen garbage, its characterized in that: comprises a pretreatment mechanism, an oil separation tank, a three-phase separator and CO 2 A supercritical extraction device, an anaerobic fermentation mechanism, a biogas purification mechanism, a biogas slurry treatment mechanism and a biogas residue treatment mechanism,
the pretreatment mechanism comprises a receiving hopper, a sorting machine and a pulping machine, wherein kitchen waste is heated in the receiving hopper, then enters the sorting machine to sort out coarse impurities, and then enters the pulping machine to prepare slurry;
the kitchen waste slurry treated by the pretreatment mechanism enters an oil separation tank, the oil separation tank is used for removing grease in an oil-water mixture, and a solid-liquid mixture deposited at the bottom of the oil separation tank enters a three-phase separator for further separation;
waste water separated from the three-phase separator enters an anaerobic fermentation mechanism, and separated waste residues pass through CO 2 The supercritical extraction device removes grease and then enters an anaerobic fermentation mechanism; the anaerobic fermentation mechanism is connected with the biogas purification mechanism and the biogas slurry treatment mechanism, the biogas purification mechanism is used for heating the butt joint hopper, and CO separated from the biogas purification mechanism 2 For CO 2 CO by supercritical extraction device 2 Supplementing; the CO 2 CO in supercritical extraction device 2 Is liquid in supercritical state at 31deg.C and 7.3MPa, and contains oil residue and liquid CO 2 Mixing the above materials, adding into extraction kettle, regulating temperature to more than 40deg.C and pressure to less than 50MPa, and liquid CO 2 Can separate grease from waste residue, and then make liquid CO through temperature change or pressure change 2 CO returning to subcritical state 2 The grease can be separated out by the gas, and the separated grease enters a grease storage tank and CO 2 Reenter CO 2 Recycling the supercritical extraction device; the biogas slurry treatment mechanism is used for treating wastewater and enabling the wastewater to reach the discharge standard; the biogas residue treatment mechanism is used for dehydrating biogas residues, and the biogas residues enter a sewage treatment system from a liquid phase after solid-liquid separation and are subjected to solid-phase composting.
2. The efficient oil and energy extraction system for kitchen waste according to claim 1, wherein: the oil removal tank is used for removing oil in a gravity oil outlet mode, the structure of the oil removal tank is advection type, the oil removal tank is connected with the oil storage tank, and oil removed in the oil removal tank enters the oil storage tank through the oil collecting pipe.
3. The efficient oil and energy extraction system for kitchen waste according to claim 1, wherein: the three-phase separator is connected with the grease storage tank, and grease at the separation position of the three-phase separator enters the grease storage tank through the oil collecting pipe.
4. The efficient oil and energy extraction system for kitchen waste according to claim 1, wherein: the anaerobic fermentation mechanism adopts an internal circulation anaerobic reactor, the internal circulation anaerobic reactor is formed by connecting 2 layers of UASB reactors in series, waste water flows in the reactor from bottom to top, bacteria adsorb and degrade organic matters, and purified water flows out of the upper part of the reactor.
5. The efficient oil and energy extraction system for kitchen waste according to claim 1, wherein: the biogas purifying mechanism comprises a biogas cabinet, a dry method desulfurization tank and a deep dehydration device, wherein the biogas generated by anaerobic digestion firstly enters the biogas cabinet and then enters the dry method desulfurization tank to remove H in the biogas by using ferric oxide 2 S, dehydrating by using a deep dehydration device.
6. The efficient oil and energy extraction system for kitchen waste according to claim 1, wherein: the biogas slurry treatment mechanism is an MBR system, the MBR system comprises a biochemical reactor and an external ultrafiltration device, the biochemical reactor comprises a denitrification tank and a nitrification tank, the nitrification tank is used for degrading organic pollutants in sewage, the denitrification tank is used for denitrification, and the external ultrafiltration device is used for filtering and separating microbial thalli.
7. The efficient oil and energy extraction system for kitchen waste according to claim 1, wherein: the biogas residue treatment mechanism adopts a spiral-pile type sludge dewatering machine.
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| CN103056145A (en) * | 2012-12-24 | 2013-04-24 | 北京时代桃源环境科技有限公司 | Kitchen waste processing method |
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