CN105925361B - The preprocess method of anaerobic digestion of kitchen wastes processing - Google Patents

The preprocess method of anaerobic digestion of kitchen wastes processing Download PDF

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Publication number
CN105925361B
CN105925361B CN201610229095.3A CN201610229095A CN105925361B CN 105925361 B CN105925361 B CN 105925361B CN 201610229095 A CN201610229095 A CN 201610229095A CN 105925361 B CN105925361 B CN 105925361B
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solid
liquid
machine
slurry
organic
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CN105925361A (en
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李月中
张进锋
浦燕新
汤晓燕
胡鑫鑫
李习武
金慧宁
朱卫兵
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Welly Environmental Technology Group Co., Ltd.
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Jiangsu Welle Environmental Protection Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00Production of fats or fatty oils from raw materials
    • C11B1/02Pretreatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00Production of fats or fatty oils from raw materials
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00Production of fats or fatty oils from raw materials
    • C11B1/06Production of fats or fatty oils from raw materials by pressing
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00Refining fats or fatty oils
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00Refining fats or fatty oils
    • C11B3/12Refining fats or fatty oils by distillation
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00Refining fats or fatty oils
    • C11B3/16Refining fats or fatty oils by mechanical means
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P5/00Preparation of hydrocarbons or halogenated hydrocarbons
    • C12P5/02Preparation of hydrocarbons or halogenated hydrocarbons acyclic
    • C12P5/023Methane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microbiology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Zoology (AREA)
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  • Bioinformatics & Cheminformatics (AREA)
  • Hydrology & Water Resources (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
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  • Water Supply & Treatment (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

It the present invention relates to a kind of preprocess method of anaerobic digestion of kitchen wastes processing, chooses aniseed kitchen garbage is poured into hopper and carry out coarse crushing and extruding and be delivered to sorting machine, drip liquid is sent into water pot through drip liquid collecting box;Sub-elect inorganic matter sundries, kitchen garbage is hammered, be crushed and pulp processing after be stirred and heat and be separated by solid-liquid separation, solid slag is delivered in organic matter recycling can, organic slurry is sent to three-phase centrifuge after the first cyclone sand removing machine carries out removal of impurities processing and proposes oil processing, oil mutually send to mention oil machine purify, remaining organic slurry enters solid-liquid mixing tank, solid slag and anaerobic fermentation system water outlet in machine matter recycling can are mixed into slurry, slurry progress waterpower is washed by rubbing with the hands and is separated by solid-liquid separation, liquid is isolated and is transported to solid-liquid mixing tank after the removal of impurities of the second cyclone sand removing machine.The present invention can maximumlly extract grease existing for each morphology form in kitchen garbage, and inorganic solid phase interference impurity can be avoided to enter anaerobic fermentation system, postorder processing system the operation is stable as far as possible.

Description

The preprocess method of anaerobic digestion of kitchen wastes processing
Technical field
The present invention relates to a kind of preprocess methods of anaerobic digestion of kitchen wastes processing, belong to kitchen garbage processing technology neck Domain.
Background technique
Kitchen garbage, also known as " swill " are a kind of wastes that people generate in daily life, production wide with source The features such as raw amount is big, the content of organic matter is up to 90% is a kind of clean energy resource that high added value is generated suitable for anaerobic fermentation Raw material.But many factors are influenced during being stored by kitchen garbage and receiving fortune, kitchen garbage can be mixed into various life rubbish Rubbish, such as metal, ceramics, glass, furthermore the seafood shell in kitchen garbage itself component, shellfish, bone, bulk meat piece and up to 2% fat content all generates interference to anaerobic fermentation, or even can make Anaerobic Digestion system unstability.Therefore, to kitchen rubbish Rubbish is pre-processed, remove to Anaerobic Digestion system generate the various sundries of inhibiting effect, grease etc. be very it is necessary to 's.
" preprocess method that kitchen garbage prepares biomass fuel " disclosed in CN102660586A, the meal that collection is shipped Kitchen rubbish isolates bulk sundries through coarse rack, by the material after sieving by being separated by solid-liquid separation, isolates liquid phase and solid content, liquid The oil obtained after Xiang Zaijing water-oil separating is mutually sold as primary product or is used to prepare biodiesel, and water phase and solid phase are then mixed Close to enter in clipper and be cut into half slurry, and by slurry through fine fack isolate meat, bone, metal, Tao Bo and fruit stone etc. compared with The sundries of hardly possible separation, the slurry after separation are used for biofermentation after beating and prepare ethyl alcohol or biogas.Although the patent can remove Thicker object and grease, while thinner metal, glass, bone etc. can be removed again, but the patent is by various sizes of lattice Grid isolate thick sundries and thin sundries, therefore grid is easily caused to block, and the tiny material of lightweight difficult to degrade such as ribbon and thin Small sandstone can not isolate slurry, and Anaerobic Digestion system is easily made surface scum crust and bottom sediment phenomenon occur.
" a kind of pretreating process of anaerobic fermentation of kitchen waste " disclosed in CN102888429A is separated by solid-liquid separation simultaneously preliminary Sub-elect on the Process ba- sis of organic waste, joined sand removing process section, prevent sandstone blocking anaerobic fermentation equipment pipeline and There is sediment phenomenon in anaerobism device bottom, but the grease for entering bio-oil separation system is handled without desanding, this can be interfered The normal operation of bio-oil separation system, and the technique not can be removed the tiny material of the lightweight difficult to degrade such as ribbon, detest Easily there is surface scum encrustation phenomena in oxygen digestion process system.The grease isolated using above two estimated processing method is main Be by kitchen garbage by can in the form of oil slick existing for part, but with dispersed oil, dissolved oil and solid phase internal grease etc. Grease existing for form is not all suggested, and these greases and then will enter Anaerobic Digestion system by slurry, these greases exist Decomposition product in anaerobic fermentation process is easy to be acidified system excessively, causes the tired of long chain fatty acids and volatile fatty acid Product, has broken original metabolic balance, causes treatment process system to be lost and stablizes.
" kitchen garbage sorts slurrying pretreatment system ", sequentially connected receiving hopper, plate disclosed in 203030621 U of CN Formula conveyer, bag-breaking machine, chain scraper conveyor, magnetic separator, laboratory sifter, broken winnowing machine, slurry storage pool, boiling sterilization Tank, three-phase separator, organic kiln basin, hydrolization and acidification tank, anaerobic fermentation tank, can be by the inorganic impurity maximum limit in kitchen garbage System sorts out, and removes grease, realizes the maximum recycling of resource, while also by kitchen garbage breaking at slurry.To ensure Enter a length of 30~60min, temperature when boiling sterilization tank carries out after the stable operation kitchen garbage sorting of entire process system The autoclaving that degree is 70 DEG C, the material obtained after boiling enter three-phase centrifuge, and water, is separated oil admittedly, wherein isolating Oil can be used as industrial chemicals, water, solid ingredient enter hydrolization and acidification tank and acidification are hydrolyzed, the material after hydrolysis acidification using Desanding processing input anaerobic fermentation tank.Although the technique by autoclaving means will be in the form of solid phase internal grease etc. existing for Grease proposes, but subsequent purifies grease with three-phase centrifuge, and the quality of the oil of generation is general, it is more difficult to as chemical industry Raw material directly uses, and the grease for entering three-phase centrifuge is handled without desanding, easily blocks pipeline and the damage of three-phase centrifuge Its internal part.
Summary of the invention
It can maximumlly extract in kitchen garbage the object of the present invention is to provide a kind of with oil existing for each morphology form Rouge, and inorganic solid phase interference impurity can be avoided to enter Anaerobic Digestion system as far as possible, the meal of processing system the operation is stable can be made The preprocess method of kitchen anaerobic digestion of refuse processing.
The technical solution of the present invention in order to achieve the above objectives is: a kind of pretreatment side of anaerobic digestion of kitchen wastes processing Method, it is characterised in that: it carries out according to the following steps,
(1), kitchen garbage reception is handled,
Kitchen garbage is unloaded to the grills on hopper top, the aniseed to result in blockage to follow-up equipment is chosen, rotates lattice Gratings pours into kitchen garbage in hopper, the opposite tape spool helical blade in two direction of rotation on the double helix output machine in hopper Coarse crushing is carried out to kitchen garbage and squeezes and is delivered to sorting machine, the drip liquid of kitchen garbage is sent to drip through the filter opening of feed hopper bottom Liquid collecting box, while the drip liquid of kitchen garbage is also sent to drip liquid collecting box when conveying, the drip liquid in heating drip liquid collecting box, and is dripped The sundries that liquid collects lower box part is evacuated to sorting machine, drip liquid is sent to water inlet tank;
(2), automatic sorting is handled,
The sorting machine inorganic matter sundries non-breakable to the plastics, fabric and hard that sub-elect separates, while to meal Kitchen rubbish hammered, be crushed and pulp processing, organic coarse particles after sorting are sent to slurry heater;
(3), it is separated by solid-liquid separation and organic slurry desanding is handled,
Organic coarse particles in slurry heater are stirred and are heated to 65~80 DEG C, by consolidating in organic coarse particles State organic matter especially grease is transformed into liquid phase, then organic coarse particles are delivered in the first solid-liquid separating machine and carry out solid-liquid point From and squeezing, the solid slag isolated is delivered in organic matter recycling can, organic slurry is delivered into being stirred in water tank and add Organic slurry temperature is maintained at 55 DEG C ± 10 DEG C by heat, then by organic slurry after the first cyclone sand removing machine carries out removal of impurities processing It send to three-phase centrifuge, the sand material of the first cyclone sand removing machine discharge, which is sent to the second solid-liquid separating machine, to be handled;
(4), oil recovery and purification processes,
Organic slurry is carried out by three-phase centrifuge to propose oil processing, the oil after separation be mutually delivered to crude oil heating tank it is interior into Row continues to stir and heat, and remaining organic slurry enters in solid-liquid mixing tank and is delivered to subsequent Anaerobic Digestion system It is interior, the oily heat phase in crude oil heating tank is purified to sending after 75 DEG C~85 DEG C to oil machine is proposed, after being proposed oil machine purification Crude oil enters in crude oil storage tank, then the waste liquid for proposing oil machine generation is sent to water inlet tank;
(5), solid slag organic matter is recycled,
The water outlet of Anaerobic Digestion system is added into organic matter recycling can, make the solid slag in organic matter recycling can and goes out Water be mixed into solid content be 5~18wt% slurry, be stirred by the blender in organic matter recycling can and to slurry into Row waterpower is washed by rubbing with the hands, and the organic matter in solid phase is discongested into liquid phase, and the slurry overflow after waterpower is washed by rubbing with the hands enters returning for rear portion It is separated by solid-liquid separation in receipts machine, the solid slag isolated is delivered to the second solid-liquid separating machine, liquid enters after inlet tank again through second It is transported in solid-liquid mixing tank after cyclone sand removing machine removal of impurities, the sand material of the second cyclone sand removing machine discharge, which is sent to second, to be separated by solid-liquid separation Machine, the second solid-liquid separating machine are separated by solid-liquid separation and are squeezed to solid slag and sundries, and the liquid isolated enters inlet tank, outside solid Transport landfill stabilization.
Organic slurry in water inlet tank is sent to out in water pot after carrying out removal of impurities processing by the first cyclone sand removing machine, is being discharged Organic slurry is continued to stir and be heated in tank, and organic slurry temperature is maintained at 55 DEG C ± 10 DEG C, out in water pot Organic slurry is evacuated to three-phase centrifuge and send after proposing oil processing to crude oil heating tank, mentions waste liquid caused by oil machine purification and send To water pot out.
Crude oil after proposing oil machine purification is sent to intermediate crude oil tank, and is examined to the crude oil purity in intermediate crude oil tank It surveys, send when crude oil purity reaches 98% to the storage of crude oil storage tank, when crude oil purity is not up to 98%, oil liquid is sent to thick It is purified again in oily heating tank.
Three-phase centrifuge propose to organic slurry the mutually aqueous miscellaneous rate of oil after oil processing less than 15%.
With at least both ends, diameter is gradually increased band axial screw to blender in the organic matter recycling can from top to bottom Blade and the pusher blade of bottom, hydraulic flow caused by helical blade when rotation make slurry along the blade face of helical blade by upper It moves downward, then is then moved from top to bottom along the blade face of helical blade again after being moved upwards under the action of tank skin, to slurry Waterpower is carried out to wash by rubbing with the hands, and organic matter recycling can is discharged in inorganic solid slag and plastic flakes by the pusher blade of bottom in time.
The double helix exports machine for coarse crushing and kitchen waste horizontal screw conveyer after extruding and the first spiral Conveyer is sent to sorting machine, and the drip liquid of horizontal screw conveyer and the first screw conveyor is sent to drip liquid collecting box.
The solid slag that first solid-liquid separating machine is isolated is sent by the second screw conveyor to organic matter recycling can, recycling machine point The slag charge separated out is delivered to the second solid-liquid separating machine by third screw conveyor, the sundries of the first cyclone sand removing machine discharge and the The sundries of two cyclone sand removing machines discharge is delivered to the second solid-liquid separating machine by third conveyor screw machine.
The preprocess method of anaerobic digestion of kitchen wastes processing of the present invention uses kitchen garbage reception processing, automatic sorting Processing, separation of solid and liquid and organic slurry desanding processing, oil recovery and purification and the recovery processing of solid slag organic matter.In kitchen garbage When receiving area, kitchen garbage can be poured on grills, choose large-scale tablecloth in kitchen garbage, big chopping block, big plastics and The aniseed such as large-scale woven bag, then will choose and poured into hopper except the kitchen garbage after aniseed passes through the grid framework being able to rotate, it can be right Aniseed sorting after kitchen garbage carry out discharging again, cloth is uniform, not will cause the blocking of feed inlet, due in source to kitchen Aniseed in garbage raw material carries out Pre-sorting, effectively prevents in follow-up equipment because blocking, winding generate the feelings to stop operation Maintenance workload is greatly reduced in condition.Double screw conveyor is used in kitchen garbage reception processing of the invention, is revolved by two The axis helical blade for turning contrary carries out coarse crushing to kitchen garbage and extruding, the solid-liquid to realize kitchen garbage raw material are preliminary Separation, the liquid after solid-liquid crude separation enter drip liquid collecting box, drip and are heated in the draining feeding water inlet tank in liquid collecting box Stirring, and the slurry isolated is sent to sorting machine, therefore can be by aniseed Pre-sorting, extruding, coarse crushing and solid-liquid crude separation and feeding It is comprehensive in one, it is structurally reasonable, occupy little space.The present invention is not fragile by sorting machine automatic plastic, fabric, metal and hard Broken inorganic matter sundries is separated, and kitchen garbage can be hammered, be crushed and pulp processing, can will in kitchen garbage mix Plastics, fabric, metal for entering etc. carry out sorting recycling, realize resource utilization.The present invention passes through to drip liquid collecting box and water inlet Draining in tank carries out heating stirring, organic coarse particles progress heating and stirring in slurry heater, stirs in high temperature and machinery It mixes under effect, the grease of the organic matter of kitchen garbage, each form is farthest entered into liquid phase, reducing grease to the greatest extent will be and then Slurry enters Anaerobic Digestion system, and influences system job stability, while handling through the first cyclone sand removing machine first through three Enter crude oil heating tank after phase centrifuge, the oil of recycling is mutually stirred and is heated at high temperature in crude oil heating tank, while also can Obtaining purity is higher crude oil, is sold as the raw material of industry, and reduce the solid slag yield of subsequent solid-liquid separating machine.The present invention is through removing Sand treated oil-containing organic slurry can the negative effect of the pipeline to oil recovery and purification processes and equipment will minimize. The hydraulic flow that solid slag organic matter recycling of the present invention generates when being rotated by the tape spool helical blade on blender only carries out slurry Waterpower is washed by rubbing with the hands, while promoting the phase mutual friction between material, and the organic matter in solid slag is discongested into liquid phase to the maximum extent, And tape spool helical blade does not shred inorganic solid slag and plastic flakes etc., further recycle to its organic matter, mentions High system resource ability reduces system outlet solid slag amount.After the liquid that the present invention isolates recycling machine is sent into inlet tank, then It is transported in solid-liquid mixing tank after the second cyclone sand removing machine separates the sundries in liquid, fine sand, ceramics can be prevented broken The sundries such as piece, bone fragments block pipeline, destroy follow-up equipment, to guarantee the normal operation of aftertreatment systems.Present invention meal Kitchen waste preprocessing technology rationally, can maximumlly be extracted in kitchen garbage with each by perfect pretreating process design Grease existing for morphology form, and inorganic solid phase interference impurity can be avoided to enter Anaerobic Digestion system as far as possible, and block pipe Road balances Anaerobic Digestion systemic metabolism, and treatment process system is stablized.Preprocess method of the invention is advanced, fortune up to standard Row is reliable, construction investment is reasonable, operating cost is low, can improve the economic benefit, environmental benefit and social benefit of enterprise.The present invention Using intermediate crude oil case, mutually detected to sending to oil in intermediate crude oil case, when crude oil quality not value up to standard, inferior oil product It will be again introduced into crude oil heating tank, another carries out proposing oil processing, until up to standard, can guarantee quality of crude oil.
Detailed description of the invention
The embodiments of the present invention are described in further detail with reference to the accompanying drawing.
Fig. 1 is the flow chart of the preprocess method of anaerobic digestion of kitchen wastes processing of the present invention.
Fig. 2 is the schematic diagram of the preprocess method of anaerobic digestion of kitchen wastes processing of the present invention.
Wherein: 1-hopper, 1-1-double helix output machine, 2-horizontal screw conveyers, the 3-the first screw conveyor, 4-sorting machines, 5-sundries discharging machines, 6-plastics baling presses, the 7-the first feed pump, 8-slurry heaters, the 9-the first solid-liquid Seperator, 10-drip liquid collecting boxs, 11-deslagging pumps, 12-clear liquid pumps, 13-water inlet tanks, the 14-the second feed pump, 15-the One cyclone sand removing machine, 16-go out water pot, 17-third feed pumps, 18-three-phase centrifuges, 19-solid-liquid mixing tanks, 20-crude oils Heating tank, 21-mention oily feed pump, and 22-propose oil machine, the 23-the second screw conveyor, 24-organic matter recycling cans, 25-recycling Machine, 26-third screw conveyors, the 27-the second solid-liquid separating machine, 28-solid slag discharging machines, 29-inlet tanks, 30-the four into Material pump, the 31-the second cyclone sand removing machine, 32-anaerobism feed pumps, 33-intermediate crude oil tanks, 34-crude oil elevator pumps, 35-crude oils Storage tank.
Specific embodiment
The preprocess method of anaerobic digestion of kitchen wastes processing of the invention, carries out according to the following steps,
(1), kitchen garbage reception is handled.
As shown in FIGS. 1 and 2 the present invention unloads kitchen garbage to the grills on 1 top of hopper, which is frame knot Structure, and be mounted on by shaft the top of hopper 1, shaft is connected to motor, by motor control grills drive overturning and Put to horizontal position, choose the aniseed to result in blockage to follow-up equipment, in kitchen garbage raw material large-scale tablecloth, big chopping block, The miscellaneous material sorting of the bulks such as big plastics and large-scale woven bag, can carry out Pre-sorting to the aniseed in kitchen garbage raw material in source, It effectively prevents in follow-up equipment that maintenance workload is greatly reduced because blocking, winding generate the case where stopping operation.Rotation Grills pour into kitchen garbage in hopper 1, and kitchen garbage will be carried out discharging again, cause reception material mouth stifled when can solve discharging The problem of material, the opposite tape spool helical blade in double helix output upper two direction of rotation machine 1-1 in hopper 1 to kitchen garbage into Row coarse crushing and extruding are simultaneously delivered to sorting machine 4, multiple double helixs output machine 1-1 can be used according to the volume of hopper 1, double Spiral exports machine 1-1 while coarse crushing bulk waste and packed waste, can extrude the moisture in waste and produces Raw a large amount of drip liquid, the drip liquid of kitchen garbage is sent to through the filter opening of 1 bottom of hopper drips liquid collecting box 10, while kitchen garbage when conveying Drip liquid also send to drip liquid collecting box 10, by drip liquid collecting box 10 collect kitchen garbage in coarse crushing and extruding and transmission process The organic slurry of middle bleeding, drip liquid collecting box 10 draining is heated and is precipitated, make drip liquid in grease will not resolidification, and The lower part of drip liquid collecting box 10 is provided at least two horizontal partitions, and energy rough segmentation drips liquid collecting box 10 every the impurity in drip liquid The sundries of lower part is evacuated to sorting machine 4 by deslagging pump 11, drip liquid is sent to water inlet tank 13.
As shown in Figure 2, the present invention exports machine 1-1 for coarse crushing and kitchen waste flat spin after extruding in double helix Conveyer 2 and the first screw conveyor 3 are sent to sorting machine 4, and double helix exports connection flat spin conveying below the outlet of machine 1-1 The import of machine 2, the import of the first screw conveyor 3 of outlet lower section connection of horizontal screw conveyer 2, the first screw conveyor 3 Outlet below the import of sorting machine 4 that connects, coarse crushing and extruding and kitchen garbage are sent to sorting machine 4, and horizontal spiral shell The drip liquid of rotation conveyer 2 and the first screw conveyor 3 is sent to drip liquid collecting box 10, passes through horizontal screw conveyer 2 and the first spiral shell Rotation conveyer 3 collects the draining of kitchen garbage in conveying to drip liquid collecting box 10, and as shown in Figure 2, the present invention can pass through steaming Vapour cleans hopper 1.
(2), automatic sorting is handled.
As shown in FIGS. 1 and 2 sorting machine 4 of the present invention is miscellaneous to the inorganic matter that the plastics, fabric and hard that sub-elect are non-breakable Object is separated, and as shown in Figure 2, the inorganic matter that automatic sorting goes out is sent to defeated again after sundries discharging machine 5 by the outlet of automatic fraction collector 4 It send to plastics baling press 6, the main component for the inorganic matter being collected into is plastics, ferrous metal etc. by plastics baling press 6, is had certain Economic recovery value, visual quality as byproduct sale or other disposition, it is other to fill.Kitchen garbage is carried out simultaneously Hammering, broken and pulp processing, by turning hammer inside sorting machine 4, to such as bone big in kitchen garbage, vegetables, meat piece After being fractured into fine grained chippings, pulp processing is carried out to the swill in kitchen garbage, organic coarse particles of generation are more from lower part Orifice plate discharge, organic coarse particles after sorting are sent by the first feed pump 7 to being handled in slurry heater 8.
(3), it is separated by solid-liquid separation and organic slurry desanding is handled.
As shown in FIGS. 1 and 2 the present invention is stirred organic coarse particles in slurry heater 8 and is heated to 65~80 DEG C Solid organic matter in organic coarse particles especially grease is transformed into liquid phase, is promoted inside slurry heater 8 equipped with stirring Device and steam pipe coil are acted on by the heat exchange of steam pipe coil, heat to organic coarse particles, be conducive to oil recovery technique Link maximizes recycling.Slurry temperature is preferably heated to 70-78 DEG C by the present invention, meanwhile, under mechanical agitation, can will have Solid organic matter in machine coarse particles can be converted maximumlly into liquid phase, not only maximumlly be extracted in kitchen garbage with each Grease existing for morphology form, Anaerobic Digestion system stable operation also reduce the solid slag yield of subsequent solid-liquid separating machine 9.
As shown in Figure 2, organic coarse particles are delivered in the first solid-liquid separating machine 9 are separated by solid-liquid separation again by the present invention, point The solid slag separated out is delivered in organic matter recycling can 24, and the organic slurry isolated is delivered into being stirred in water tank 13 and add Heat can be added in water inlet tank 13 by clear liquid pump 12 organic slurry temperature being maintained at 55 DEG C ± 10 DEG C, what the present invention isolated Solid slag is sent by the second screw conveyor 23 to organic matter recycling can 24.Disk is provided with outside the tank body of present invention water inlet tank 13 Pipe is acted on by the heat exchange of steam pipe coil, is heated to organic slurry in water inlet tank 13, the top for tank of intaking is equipped with stirring Water inlet 13 inside organic slurry of tank is sufficiently stirred in device.
As shown in FIGS. 1 and 2 the present invention again send organic slurry after the first cyclone sand removing machine 15 carries out removal of impurities processing to three In phase centrifuge 18, the organic slurry heated in tank 13 of intaking can be sent to the first cyclone sand removing machine 15 by the second feed pump 14 Inside handled, the first cyclone sand removing machine 15 of the invention be when being rotated in desander according to the solid particle in fluid from Heart separation carries out removal of impurities processing, the sundries such as fine sand, potsherd, bone fragments in organic slurry is removed, the first Swirling flow sand-removing The sundries that machine 15 is discharged send to the second solid-liquid separating machine 27 and is handled, and the sundries of first cyclone sand removing machine 15 discharge passes through the Three conveyor screw machines defeated 26 are sent to the second solid-liquid separating machine 27.The present invention has carried out at desanding organic slurry before mentioning oil Reason can prevent gravel from blocking conveyance conduit, destroy the normal operation of follow-up equipment, and inorganic solid phase can be avoided to interfere impurity as far as possible Into Anaerobic Digestion system, to guarantee the normal operation of Anaerobic Digestion system.
As shown in Figure 2, the present invention is preferably that the organic slurry intake in tank 13 is removed by the first cyclone sand removing machine 15 It is sent to out in water pot 16, the organic slurry after desanding is stored in out in water pot 16, to the organic slurry after removal of impurities after living together reason Continue to stir and heat, the temperature for using the organic slurry in water pot 16 is maintained at 55 DEG C ± 10 DEG C, out in water pot 16 Organic slurry is evacuated to three-phase centrifuge 18 and send after proposing oil processing to crude oil heating tank 20.The present invention goes out having in water pot 16 Machine slurries are delivered to three-phase centrifuge 18 by third feed pump 17 and carry out proposing oil processing, and the waste liquid through proposing the generation of oil machine 22 can also It send to water pot 16 out, the structure for going out water pot 16 of the invention and water inlet 13 structure of tank are essentially identical.
(4), oil recovery and purification.
As shown in Figure 2, the present invention propose oil processing to organic slurry by three-phase centrifuge 18, three-phase of the invention from Scheming 18 using the horizontal centrifuge that can preferably separate solid-state and aquosity and oily state, be after being separated by solid-liquid separation oily phase, water phase and Organic solid slag, three-phase centrifuge mention to organic slurry oil of the mutually aqueous miscellaneous rate of oil less than 15%, after separation after oil processing It is mutually delivered in crude oil heating tank 20 and continue stirring and heat, remaining organic slurry, that is, water phase and solid slag enter solid-liquid and mix It in mould assembling 19 and is delivered in subsequent Anaerobic Digestion system, organic slurry is stored in solid-liquid mixing tank 19, then by anaerobism Feed pump 32 is pumped into subsequent Anaerobic Digestion system and is handled.After being heated to 75 DEG C~85 DEG C in crude oil heating tank 20 It send to proposing oil machine 22 and is purified, the oil in crude oil heating tank 20 can be added thermal control and sent after 77 DEG C~82 DEG C to mentioning by invention Oil machine 22 is purified, through mention oil machine 22 purify after crude oil enter in crude oil storage tank 35, mention oil machine 22 generation waste liquid send to It intakes in tank 13, crude oil can be sold or be reprocessed.The present invention mutually heats the oil that three-phase centrifuge 18 generates in crude oil Reheating is carried out in tank 20, can further realize the recycling of grease, and also ensures that the quality of grease purification.Of the invention mentions Oil machine 22 can be used the vertical of separation liquid and mention oil machine, and energy automatic discharge, and deslagging period and deslagging time is adjusted, when When reaching three-phase centrifuge 18 from the organic slurry in water pot 16 out, mention oil machine 22 purify caused by waste liquid can also send to water outlet In tank 16, it is pumped by mentioning oily feed pump 21 and proposes oil machine 22 and purified, the oil after purification enters in crude oil storage tank 35.The present invention For the quality for further increasing grease purification, the crude oil after proposing oil machine 22 and purifying is sent to intermediate crude oil tank 33, and to centre Crude oil purity in crude oil tank 33 is detected, and is sent when crude oil purity reaches 98% to crude oil storage tank 35 in storing, can be passed through Crude oil elevator pump 34 will be pumped to crude oil storage tank 35 and be stored when crude oil, and when crude oil purity is not up to 98%, oil liquid is sent to crude oil It is purified again in heating tank 20.
(5), solid slag organic matter recycles.
Still contain a large amount of organic matters in the solid slag isolated through the first solid-liquid separating machine 9, it is organic sufficiently to recycle this part Matter, the present invention use solid slag organic matter recovery process.As shown in Figure 2, anaerobism is added into organic matter recycling can 24 and disappears by the present invention The water outlet for changing processing system, using the water outlet of anaerobic fermentation system as dilution water, energy maximum resource is utilized, and recycles organic matter Solid slag and water outlet in tank 24 are mixed into the slurry that solid content is 5~18wt%, pass through the blender in organic matter recycling can 24 It is stirred and slurry progress waterpower is washed by rubbing with the hands, the organic matter in solid phase is discongested into liquid phase.Organic matter recycling can of the present invention Blender in 24 has that at least diameter is gradually increased the helical blade of tape spool and the pusher blade of bottom from top to bottom at both ends, rotation Hydraulic flow caused by the helical blade of tape spool moves slurry from top to bottom along the blade face of helical blade when turning, then in tank skin It is then moved from top to bottom along the blade face of helical blade again after being moved upwards under effect, waterpower is carried out to slurry and is washed by rubbing with the hands, bottom Organic matter recycling can 24 is discharged in inorganic solid slag and plastic flakes by pusher blade in time.What helical blade of the present invention generated when rotating Hydraulic flow only carries out waterpower to slurry and washes by rubbing with the hands, while promoting the phase mutual friction between material, by the organic matter maximum limit in solid slag It discongests into liquid phase to degree, and helical blade does not shred inorganic solid slag and plastic flakes etc., and lower part will be flowed to Inorganic solid slag and plastic flakes be discharged in time by pusher blade, therefore can be maximum to organic matter in organic waste solid slag Recycling improves system resource ability, reduces system outlet solid slag amount.Agitating shaft of the present invention is multiple by helical blade and its bottom Pusher bed plate matches, and not only hydraulic flow state is good, and the discharging after capable of washing by rubbing with the hands to waterpower is also facilitated thoroughly to facilitate.
As shown in Figure 2, the slurry overflow after the present invention washes waterpower by rubbing with the hands, which enters, carries out solid-liquid point in the recycling machine 25 at rear portion From, drum-type solid-liquid separator can be used in recycling machine 25, and it is interior set Shaftless spiral blade, the slurry after being washed by rubbing with the hands by waterpower is in rotary drum It is beaten and is overturn under effect and be separated by solid-liquid separation, the solid slag isolated is delivered to the second solid-liquid separating machine 27, liquid enters It is sent in solid-liquid mixing tank 19 after the removal of impurities of the second cyclone sand removing machine 31 again after inlet tank 29, the liquid in inlet tank 29 will be present It is pumped into the second cyclone sand removing machine 31 through the 4th feed pump 30, enters solid-liquid mixing tank 19 by the liquid that desanding is handled and stores, by Anaerobism feed pump 32 is pumped into subsequent Anaerobic Digestion system and enters processing.And the slag charge that recycling machine 25 is isolated passes through third Screw conveyor 26 is delivered to the second solid-liquid separating machine 27, and the sundries of the second cyclone sand removing machine 31 discharge, which is sent to second, to be separated by solid-liquid separation Machine 27 carries out separation removal, this hair to fine sand, potsherd, the bone fragments etc. in liquid by the second cyclone sand removing machine 31 Before the bright anaerobism water inlet after the second solid-liquid separating machine 27, it is mixed that solid-liquid is entered by the second cyclone sand removing machine 31 removing liquid Sundries in mould assembling 19 prevents blocking rear portion pipeline, and destroys follow-up equipment, while can also avoid inorganic solid phase interference miscellaneous as far as possible Matter enters Anaerobic Digestion system, to guarantee the normal operation of Anaerobic Digestion system.As shown in FIGS. 1 and 2 the present invention the Two solid-liquid separating machines 27 are separated by solid-liquid separation and are squeezed to solid slag and sundries, and the liquid isolated enters inlet tank 29, outside solid Transport landfill stabilization, through the second solid-liquid separating machine 27 separation the inorganic solid slag content of organic matter less than 5%, moisture content less than 60%, Inorganic solid slag is transported outward into landfill stabilization by solid slag discharging machine 28.
The biogas that the present invention is generated using subsequent anaerobic fermentation is as the fuel of boiler, the steam pair for recycling boiler to generate Drip liquid collecting box 10, water inlet tank 13, out water pot 16 and charging heater 8 and crude oil heating tank 20 are heated, and operation is reduced Cost, using the water outlet of Anaerobic Digestion system as dilution water, energy maximum resource is utilized, and is handled by adding heat and removal of impurities After can maximumlly extract in kitchen garbage and avoid inorganic solid phase from interfering with grease existing for each morphology form and as far as possible Impurity enters Anaerobic Digestion system, can make anaerobic fermentation system reliability service.

Claims (6)

1. a kind of preprocess method of anaerobic digestion of kitchen wastes processing, it is characterised in that: it carries out according to the following steps,
(1), kitchen garbage reception is handled,
Kitchen garbage is unloaded to the grills on hopper top, the aniseed to result in blockage to follow-up equipment is chosen, rotates grills Kitchen garbage is poured into hopper, the opposite tape spool helical blade in two direction of rotation is to meal on the double helix output machine in hopper Kitchen rubbish carries out coarse crushing and squeezes and be delivered to sorting machine, and the drip liquid of kitchen garbage is sent to drip liquid through the filter opening of feed hopper bottom and receives Header, while the drip liquid of kitchen garbage is also sent to drip liquid collecting box when conveying, the drip liquid in heating drip liquid collecting box, and is dripped liquid and received The sundries of collection lower box part is evacuated to sorting machine, drip liquid is sent to water inlet tank;
(2), automatic sorting is handled,
The sorting machine inorganic matter sundries non-breakable to the plastics, fabric and hard that sub-elect separates, while to kitchen rubbish Rubbish hammered, be crushed and pulp processing, organic coarse particles after sorting are sent to slurry heater;
(3), it is separated by solid-liquid separation and organic slurry desanding is handled,
Organic coarse particles in slurry heater are stirred and are heated to 65~80 DEG C, the solid-state in organic coarse particles is had Grease in machine matter is transformed into liquid phase, then organic coarse particles are delivered in the first solid-liquid separating machine and is separated by solid-liquid separation and is pressed It squeezes, the solid slag isolated is delivered in organic matter recycling can, organic slurry is delivered into stirring and heating in water tank, will be had Machine slurry temperature is maintained at 55 DEG C ± 10 DEG C, then organic slurry is sent after the first cyclone sand removing machine carries out removal of impurities processing to three-phase In centrifuge, the sand material of the first cyclone sand removing machine discharge, which is sent to the second solid-liquid separating machine, to be handled;
(4), oil recovery and purification processes,
Organic slurry is carried out by three-phase centrifuge to propose oil processing, the oil after separation be mutually delivered in crude oil heating tank progress after Continuous stirring and heating, remaining organic slurry enter in solid-liquid mixing tank and are delivered in subsequent Anaerobic Digestion system, Oily heat phase in crude oil heating tank is purified to sending after 75 DEG C~85 DEG C to oil machine is proposed, the crude oil after proposing oil machine purification It send into crude oil storage tank, then by the waste liquid for proposing oil machine generation to water inlet tank;
(5), solid slag organic matter is recycled,
The water outlet of Anaerobic Digestion system is added into organic matter recycling can, mixes solid slag and water outlet in organic matter recycling can The slurry that solid content is 5~18wt% is synthesized, be stirred by the blender in organic matter recycling can and water is carried out to slurry Power is washed by rubbing with the hands, and the blender in the organic matter recycling can has at least that diameter is gradually increased the helical-blade of tape spool from top to bottom at both ends Piece and the pusher blade of bottom, hydraulic flow caused by helical blade when rotation make slurry along the blade face of helical blade on to Lower movement, then then moved from top to bottom along the blade face of helical blade again after being moved upwards under the action of tank skin, to slurry into Row waterpower is washed by rubbing with the hands, and organic matter recycling can is discharged in inorganic solid slag and plastic flakes by the pusher blade of bottom in time, in solid phase Organic matter discongest into liquid phase, the slurry overflow after waterpower is washed by rubbing with the hands, which enters in the recycling machine at rear portion, to be separated by solid-liquid separation, The solid slag isolated is delivered to the second solid-liquid separating machine, liquid enters after inlet tank and to convey after the removal of impurities of the second cyclone sand removing machine again Into solid-liquid mixing tank, the sand material of the second cyclone sand removing machine discharge is sent to the second solid-liquid separating machine, and the second solid-liquid separating machine is to solid Slag and sundries are separated by solid-liquid separation and are squeezed, and the liquid isolated enters inlet tank, solid outward transport landfill stabilization.
2. the preprocess method of anaerobic digestion of kitchen wastes processing according to claim 1, it is characterised in that: in water inlet tank Organic slurry removal of impurities processing is carried out by the first cyclone sand removing machine after be sent to out in water pot, in water pot out to organic slurry after It is continuous to stir and heat, and organic slurry temperature is maintained at 55 DEG C ± 10 DEG C, the organic slurry in water pot is evacuated to three-phase out Centrifuge send after proposing oil processing to crude oil heating tank, mentions waste liquid caused by oil machine purification and send to water pot out.
3. the preprocess method of anaerobic digestion of kitchen wastes processing according to claim 1, it is characterised in that: through proposing oil machine Crude oil after purification is sent to intermediate crude oil tank, and is detected to the crude oil purity in intermediate crude oil tank, when crude oil purity reaches Sent when to 98% to storing in crude oil storage tank, when crude oil purity is not up to 98%, by oil liquid send in crude oil heating tank again Purification.
4. the preprocess method of anaerobic digestion of kitchen wastes processing according to claim 1, it is characterised in that: three phase centrifugation Machine propose to organic slurry the mutually aqueous miscellaneous rate of oil after oil processing less than 15%.
5. the preprocess method of anaerobic digestion of kitchen wastes processing according to claim 1, it is characterised in that: double spiral shells Rotation output machine send coarse crushing and kitchen waste horizontal screw conveyer after extruding and the first screw conveyor to sorting machine, And the drip liquid of horizontal screw conveyer and the first screw conveyor is sent to drip liquid collecting box.
6. the preprocess method of anaerobic digestion of kitchen wastes processing according to claim 1, it is characterised in that: the first solid-liquid The solid slag that seperator is isolated is sent by the second screw conveyor to organic matter recycling can, and the slag charge that recycling machine is isolated passes through the Three screw conveyors are delivered to the second solid-liquid separating machine, the sundries of the first cyclone sand removing machine discharge and the discharge of the second cyclone sand removing machine Sundries the second solid-liquid separating machine is delivered to by third conveyor screw machine.
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