CN101927254B - Comprehensive food waste treatment system and treatment method thereof - Google Patents

Comprehensive food waste treatment system and treatment method thereof Download PDF

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Publication number
CN101927254B
CN101927254B CN200910062818A CN200910062818A CN101927254B CN 101927254 B CN101927254 B CN 101927254B CN 200910062818 A CN200910062818 A CN 200910062818A CN 200910062818 A CN200910062818 A CN 200910062818A CN 101927254 B CN101927254 B CN 101927254B
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China
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liquid
subsystem
solid
heating kettle
screw conveyer
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CN200910062818A
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Chinese (zh)
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CN101927254A (en
Inventor
亓培实
何东平
郑晓
孙建国
刘良忠
何小平
林国祥
郭涛
杜蕾蕾
樊玉文
万辉
冯竹君
刘丽娜
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武汉百信环保能源科技有限公司
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    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/74Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes

Abstract

The invention discloses a comprehensive food waste treatment system and a treatment method thereof, belonging to the technical field of environmental governance. Solids are recovered from the food waste to prepare composite protein feed, synchronously oil is recovered to prepare industrial articles, such as soap powder, bio diesel, fuel oil, and the like and the food waste water is recovered to prepare fertilizers so as to realize the aim of comprehensively utilizing the food waste. The system of the invention has reasonable design, various subsystems are mutually independent and mutually communicated to form a production line for rapidly treating the food waste; and the food waste treatment method by utilizing the production line is simple, convenient and practical, has extremely high treatment capability, turns waste into valuables and greatly solves the problem of urban environmental pollution. The production line of the invention can be used for treating 10-500 t of food waste every day, i.e. about 40 percent of the refuse quantity of a large city like Wuhan, and every 100 T of food waste can produce 8-12 t of rough protein feed, 2-4 t of refined crude oil and 50-70 t of liquid fertilizers.

Description

Changing food waste total system and processing method thereof

Technical field

The invention belongs to the environmental improvement technical field, be specifically related to the total system of a kind of city changing food waste, and the integrated conduct method of city changing food waste.

Background technology

In the prior art; The method of disposal of municipal refuse has usually burns and landfill, if domestic waste is burned, because the moisture of changing food waste is usually up to about 90%; Caloric value is 2100kJ/kg~3100kJ/kg; Burn together with other rubbish, the caloric value that not only can not satisfy waste incineration and generating electricity requires (being more than the 5000kJ/kg), can cause incinerator to burn insufficient on the contrary and the generation noxious material; If house refuse is carried out landfill, can should not handle because mixing people's changing food waste moisture height equally.And burning, landfill all can cause the waste of large amount of organic.Along with Urbanization in China is accelerated, the changing food waste amount of generation is increasing.In daily life, the resident sneaks into changing food waste in the house refuse usually, delivers to garbage collection points through polybag, makes the composition of domestic waste and characteristic that variation take place.Changing food waste has greatly polluted surrounding environment depositing, collect, in transhipment and the garbage loading embeading process, because its moisture content is higher with content of organics, very easily rots within a short period of time smelly and grow mosquitos and flies etc.Changing food waste described here refers to result from edible remnants such as meal kitchen operation, resident living and corporation eatery, is commonly called as swill.Because changing food waste is rich in organic matter, thereby might good growth and breeding environment be provided, cause transmission of disease for various pathogeny microorganisms and various fly worm of carrying the pathogeny microorganism.In addition, the discharging of waste grease and residue can be stopped up water channel, contaminated environment.Meal kitchen complex chemical composition, wherein water also contains inorganic salts, organic acid and various macromolecular organic compound (protein starch, cellulose, heteroglycan, fat) etc. up to more than 90%.Though with this type of rubbish through landfill disposal have simply, characteristics such as convenient and disposal cost is cheap.But the refuse leachate colourity by refuse landfill produces is dark, concentration big, pollute heavy, complicated component, belongs to high concentrated organic wastewater; As do not deal carefully with, will cause serious environmental to pollute.The processing of percolate is stranded much more difficult than industry, sanitary sewage, its processing is the focus and the difficult point of sewage treatment area in recent years always.Research and development refuse leachate treatment technology and method have important Significance for Environment and social effect.

Summary of the invention

To the above-mentioned deficiency of prior art, the technical problem that the present invention will solve provides a kind of changing food waste total system, is combined by 7 sub-systems, makes processing once property completion on the tinuous production of a batch production of changing food waste.The present invention also provides the changing food waste integrated conduct method, on device fabrication line of the present invention, has realized the target of changing food waste comprehensive utilization.

Technical scheme of the present invention is: the changing food waste total system by batch turning letter sorting subsystem A, add hot extrusion subsystem B, Separation of Solid and Liquid subsystem C-1 and C-2, oven dry subsystem D, water-oil separating subsystem E, packing subsystem F combines, each subsystem interconnects and is separate;

Batch turning letter sorting subsystem A is arranged on native system foremost, and changing food waste car, refuse hopper, the driving batch (-type) ground that cooperatively interacts is poured rubbish in the rubbish seperator into; The big assorted outlet of rubbish seperator is positioned at the belt conveyor lower end, and the belt conveyor upper end is through being connected with Roughpulverizer behind the magnetic separator; Conveying worm is undertaken under little assorted outlet of rubbish seperator and the Roughpulverizer, and helical feed machine tail end and inclined screw conveyer lower end join; Inclined screw conveyer upper end with add hot extrusion subsystem B and be connected; The rubbish seperator also is connected with Separation of Solid and Liquid subsystem C-2 through pipeline;

The inclined screw conveyer upper end that entering adds hot extrusion subsystem B is connected with vibratory sieve; The vibratory sieve discharge end is connected with heating kettle through the inclined screw conveyer, the solid material discharging opening that is positioned at the extruder of heating kettle bottom be connected with the inclined screw conveyer and with mass transport to drying subsystem D; The liquid material discharging opening of extruder is connected with Separation of Solid and Liquid subsystem C-1 through pipeline;

The solid material that gets into oven dry subsystem D through the inclined screw conveyer is input to dryer; Conveying worm is arranged under the discharging opening of dryer; The output of conveying worm is connected with the inclined screw conveyer, and the output of inclined screw conveyer is connected with packing subsystem F;

The mass transport that gets into packing subsystem F through the inclined screw conveyer arrives cooler; Be provided with conveying worm under the cooler discharging opening; Conveying worm is connected with bucket elevator; Bucket elevator is connected with back one bucket type elevator through pulverizer, and back one bucket type elevator discharging opening is connected with packing machine;

The material of importing Separation of Solid and Liquid subsystem C-2 from the rubbish seperator of batch turning letter sorting subsystem A through pipeline is connected with temporary jar, and temporary jar is connected with oil-water separator, and the oil that oil-water separator comes out is towards the crude oil pond, and sewage is discharged by sewer; The liquid material that transports through pipe from the extruder that adds hot extrusion subsystem B gets into Separation of Solid and Liquid subsystem C-1; The liquid material pipeline is connected with two fluid reservoirs; Two fluid reservoirs are connected with horizontal centrifuge, and the isolated liquid of horizontal centrifuge is connected with water-oil separating subsystem E through liquid storage tank and pump;

Water-oil separating subsystem E is connected with Separation of Solid and Liquid subsystem C-1 through pump; The liquid that pump is got gets into three heating kettles; Three heating kettle tops are connected with the agent jar of wadding a quilt with cotton with fixed attention, and three heating kettle bottom discharge mouths are connected with the butterfly centrifugal machine, and butterfly centrifugal machine discharging opening is connected with the crude oil pond; Crude oil is squeezed into vacuum dehydration pot top through pump, and the oil of discharging from the vacuum dehydration pot bottom comes together in refining crude oil jar behind steam reciprocating pump, filter.

The vibratory sieve that adds among the hot extrusion subsystem B also is connected with blower fan, deduster, separator, airlock.

The dryer of oven dry subsystem D also is connected with compensator, blower fan, blast pipe.

A kind of changing food waste integrated conduct method contains batch turning letter sorting operation A, heating extrusion process B, solid-liquid separation process C-1 and C-2, baking operation D, water-oil separating operation E, packaging process F, and each process operations is following:

Batch turning letter sorting operation A is the operation foremost of this method, and the kitchen garbage truck of having a dinner, refuse hopper, the driving batch (-type) ground that cooperatively interacts is poured rubbish in the rubbish seperator into; In the rubbish seperator, the solid in the rubbish is divided into big assorted and little assorted; Be transported to Roughpulverizer after big assorted magnetic separator through the belt conveyor upper end is selected the iron content solid, Roughpulverizer little the mixing of coming out with the rubbish seperator after the coarse crushing of will mix greatly transported to the inclined screw conveyer through conveying worm together; The inclined screw conveyer is sent to heating extrusion process B with material; The liquid material that from the rubbish seperator, comes out is sent to solid-liquid separation process C-2 by the road;

Through the material entering vibratory sieve of inclined screw conveyor delivery to heating extrusion process B; Through vibratory sieve dirty gas is discharged; The material that comes out to heating kettle, is 0.1MPa with pressure through the inclined screw conveyor delivery in heating kettle, and temperature is after under 40 ℃~50 ℃ the condition material being heated; Material enters in the extruder, and the solid material that comes out from extruder passes through the inclined screw conveyor delivery to baking operation D; The liquid material that extruder comes out is transported to solid-liquid separation process C-1 through pipeline;

The solid material of transporting to baking operation D is input in the dryer, and the bake out temperature of dryer is not less than 110 ℃; The water that in dryer, produces, vapour are discharged through compensator, blower fan and blast pipe; The material of in dryer, drying is sent to packaging process F through conveying worm and inclined screw conveyer with material;

The mass transport that gets into packaging process F through the inclined screw conveyer is cooled off after conveying worm is sent into bucket elevator to cooler; Bucket elevator promotes material and send in the pulverizer; Pulverizer come out granular material through after a bucket type elevator be sent to packing machine and pack; This packing product is composite protein feed, and protein content reaches 20~33.5% in the composite protein feed;

Send into temporary jar from the liquid material that the rubbish seperator of batch turning letter sorting operation A comes out through pipeline input solid-liquid separation process C-2; Material in temporary jar is sent into oil-water separator; The oil of separating through oil-water separator is sent to the crude oil pond, and sewage is discharged by sewer;

After the liquid material that comes out from the extruder of heating extrusion process B is sent into Separation of Solid and Liquid subsystem C-1; Liquid material is input in two fluid reservoirs by the road; Two fluid reservoirs are input to liquid material the horizontal centrifuge from its bottom, pass through liquid storage pool and the past water-oil separating operation E of pumping through the isolated liquid of horizontal centrifuge;

Be driven into three heating kettles through pump from the liquid that solid-liquid separation process C-1 gets to water-oil separating operation E; The agent jar of wadding a quilt with cotton with fixed attention injects the agent of wadding a quilt with cotton with fixed attention to accelerate separation process from three heating kettle tops; The heating kettle temperature is 70 ℃~95 ℃, and speed of agitator is 30~60 rev/mins; The material that comes out from three heating kettle bottoms is input to and carries out the breakdown of emulsion process the butterfly centrifugal machine; Butterfly centrifugal machine output material gets into the crude oil pond, and crude oil is squeezed into vacuum dehydration pot top through pump in the crude oil pond, and vacuum is 0.65~1.3KPa in the vacuum dehydration pot, heats 90 ± 5 ℃, temperature retention time 30~40min.The oil of discharging from the vacuum dehydration pot bottom comes together in refining crude oil jar behind steam reciprocating pump, filter; Refining crude oil in the refining crude oil jar is transported to the deep processing operation, can be used to make biodiesel and soap powder; The waste liquid of discharging in the vacuum dehydration pot is as liquid fertilizer.

In heating extrusion process B; The solid material that comes out from extruder through the inclined screw conveyor delivery before the baking operation D; Earlier solid material is transferred in other the reactor, will be fermented the back mass transport to baking operation D through the inclined screw conveyer again after fermenting; Described fermentation condition is: screening geotrichum candidum F-1, aspergillus oryzae F-6 carries out the dominant bacteria combination, medium preparation: fermentation medium high-temperature sterilization 20min adds 1~5% (NH 4) 2SO 4, 1~8%KH 2PO 4, 1~6%NaCl, initial pH5.5, moisture content 60 ± 2%; Fermentation seed liquid 15%, inoculative proportion are 1: 1, and fermentation time is 5 days.

The agent of wadding a quilt with cotton with fixed attention in the agent jar of wadding a quilt with cotton with fixed attention is one or more the mixture in ferric trichloride, aluminium polychloride, ferrous sulfate, aluminum sulfate, bentonite, the alum.

System of the present invention is reasonable in design; Each subsystem is separate to be interconnected again; Form the production line of a fast processing changing food waste, utilized the processing method of changing food waste of this production line simple and easy to do, had high disposal ability; Turn waste into wealth, and greatly alleviated the city environmental pollution problem.Production line ability every day processing utensil rubbishes 10~500t of the present invention accounts for 40% of the such big city quantity of refuse in Wuhan City, and every 100T changing food waste can be produced the rough protein feed of 8~12t, the refining crude oil of 2~4t, the liquid fertilizer of 50~70t.

Description of drawings

Accompanying drawing 1 is the structural representation of subsystem of the present invention or operation A, B, C-2;

Accompanying drawing 2 is structural representations of subsystem of the present invention or process B, D;

Accompanying drawing 3 is structural representations of subsystem of the present invention or operation F;

Accompanying drawing 4 is structural representations of subsystem of the present invention or operation C-2, E;

Accompanying drawing 5 is technological process schematic block diagrams of the present invention.

The accompanying drawing acceptance of the bid is kept the score and is stated as follows: 1-changing food waste car; The 2-driving; The 3-refuse hopper; 4-rubbish seperator; The 5-belt conveyor; 6-a, b, c-conveying worm; Temporary jar of 7-; The 8-magnetic separator; The 9-Roughpulverizer; The 10-oil-water separator; 11-a, b, c, d-inclined screw conveyer; 12-a, b-blower fan; The 13-vibratory sieve; The 14-deduster; The 15-separator; The 16-airlock; The 17-heating kettle; The 18-extruder; The 19-dryer; The 20-compensator; The 21-blast pipe; The 22-cooler; The 23-separator; 24-a, b-bucket elevator; The 25-pulverizer; Temporary jar of 26-; The 27-packing machine; The 28-sub-cylinder; The 29-screw pump; 30-a, b-fluid reservoir; The 31-horizontal centrifuge; 32-albumen mud sump; The 33-liquid storage tank; The 34-screw pump; 35-a, b, c-pump; 36-a, b, c-heating kettle; The 37-mud pit; 38-butterfly centrifugal machine; 39-crude oil pond; 40-dewater the pot; The 41-air compressor machine; The 42-steam reciprocating pump; The 43-filter; The 44-buried storage; The 45-cyclone hydraulic separators; The 46-receiving tank; The 47-compensator; 48-makes with extra care the crude oil jar; 49-carbonated drink tandem injection pump; The 50-gas-distributing cylinder; The 51-agent jar of wadding a quilt with cotton with fixed attention.

The specific embodiment

Be described in further detail below in conjunction with the accompanying drawing specific embodiments of the invention.For for simplicity, below describe the equipment of system and method lumped together and carry out.Shown in accompanying drawing 1, batch turning letter sorting operation A is the operation foremost of this method, and the kitchen garbage truck 1 of having a dinner, driving 2, the refuse hopper 3 batch (-type) ground that cooperatively interacts is poured changing food waste in the rubbish seperator 4 into; Solid in rubbish seperator 4 in the rubbish is divided into assorted greatly and little assorted, and big mixing transported to Roughpulverizer 9 through belt conveyor 5, when needing, at belt conveyor 5 section starts the manual sorting is set, and glass bottle, plastic containers etc. are sorted out removal.On belt conveyor 5 tops magnetic separator 8 is set, gets into Roughpulverizer 9 again after ferrous contaminants in big assorted is removed.Conveying worm 6-a is undertaken under rubbish seperator 4 and the Roughpulverizer 9; The isolated little assorted material after pulverizing with Roughpulverizer 9 of rubbish seperator 4 is delivered to inclined screw conveyer 11-a in the lump, and deliver in the vibratory sieve 13 of heating extrusion process B through inclined screw conveyer 11-a.Rubbish seperator 4 isolated liquid materials are transported in the temporary jar 7 of solid-liquid separation process C-2 by the road; Liquid material is transported to oil-water separator 10 after Steam Heating in temporary jar 7; Isolated oil is transported in the crude oil pond 39 shown in Figure 4 in oil-water separator 10, and isolated waste water is got rid of through sewage draining exit.The vibratory sieve 13 of heating extrusion process B sieves the material of sending into, and the waste gas that produces in the screening process is discharged into exhaust piping through separator 15, deduster 14 and blower fan 12-a.

Shown in accompanying drawing 2; Be connected inclined screw conveyer 11-b between vibratory sieve 13 and the heating kettle 17 and will sieve the back material and deliver in the heating kettle 17, the heating-up temperature of heating kettle 17 is 40 ℃~50 ℃, and heating kettle 17 internal pressures are 0.1MPa; The reactant of heating kettle 17 gets into extruder 18 and pushes; Liquid material is wherein transported to solid-liquid separation process C-1 by the road, and dry material is wherein transported to dryer 19 through inclined screw conveyer 11-c and carried out drying, and dry back material is transported to packaging process F through conveying worm 6-b and inclined screw conveyer 11-b and (seen Fig. 3; This part is slightly) in, packing material is a protein feed.

In the accompanying drawing 4; Extruder 18 from process B and the liquid material that comes gets among two fluid reservoir 30-a and the 30-b; Be arranged on the A place of inclined screw conveyer 11-c that the horizontal centrifuge 31 under fluid reservoir 30-a and the 30-b returns isolated solid matter in the liquid material to the accompanying drawing 2 arrow indication shown in going up, the B place of the arrow indication shown in the inclined screw conveyer 11-c of accompanying drawing 2 goes up is three grades of chaffs of adding part, and one side economizes on resources; Reduce cost on the other hand, also improve product quality simultaneously.31 isolated liquid materials of horizontal centrifuge get into oil storage pool 33; And it is squeezed among heating kettle 36-a among the operation E, b, the c through pump 35-a; Join among above-mentioned heating kettle 36-a, b, the c to accelerate separation process through the agent jar 51 of wadding a quilt with cotton the with fixed attention agent of will wadding a quilt with cotton with fixed attention; Temperature therebetween is 70 ℃~95 ℃, and speed of agitator is 30~60 rev/mins; The material that comes out from heating kettle 36-a, b, c bottom is input to and carries out the breakdown of emulsion process the butterfly centrifugal machine 38; Butterfly centrifugal machine 38 output material get into crude oil pond 39; Crude oil is squeezed into vacuum dehydration pot 40 tops through pump 35-b in the crude oil pond 39; Vacuum 0.65~1.3KPa in the vacuum dehydration pot 40; Heat 90 ± 5 ℃, temperature retention time 30-40min, the oil of discharging from vacuum dehydration pot 40 bottoms come together in refining crude oil jar 48 behind steam reciprocating pump 42, filter 43; Refining crude oil in the refining crude oil jar 48 is transported to the deep processing operation, can be used to make biodiesel and soap powder; The waste liquid of discharging in the vacuum dehydration pot 40 is as liquid fertilizer.

Generally speaking; The present invention reclaims solid content and prepares composite protein feed from changing food waste; Recovered oil is prepared into soap powder, biodiesel, fuel wet goods industrial goods synchronously, reclaims kitchen garbage, waste-water and processes fertilizer, has realized the target of changing food waste comprehensive utilization.

Claims (6)

1. changing food waste total system; It is characterized in that: native system by batch turning letter sorting subsystem A, add hot extrusion subsystem B, Separation of Solid and Liquid subsystem C-1 and C-2, oven dry subsystem D, water-oil separating subsystem E, packing subsystem F combines, each subsystem interconnects and is separate;
Batch turning letter sorting subsystem A is arranged on native system foremost, and changing food waste car (1), driving (2), refuse hopper (3) the batch (-type) ground that cooperatively interacts is poured rubbish in the rubbish seperator (4) into; The big assorted outlet of rubbish seperator (4) is positioned at belt conveyor (5) lower end, and belt conveyor (5) upper end is connected with Roughpulverizer (9) through magnetic separator (8) back; Conveying worm A (6-a) is undertaken under little assorted outlet of rubbish seperator (4) and the Roughpulverizer (9), and said conveying worm A (6-a) tail end and inclined screw conveyer A (11-a) lower end join; Said inclined screw conveyer A (11-a) upper end with add hot extrusion subsystem B and be connected; Rubbish seperator (4) also is connected with Separation of Solid and Liquid subsystem C-2 through pipeline;
Said inclined screw conveyer A (11-a) upper end that entering adds hot extrusion subsystem B is connected with vibratory sieve (13); Vibratory sieve (13) discharge end is connected with heating kettle (17) through inclined screw conveyer B (11-b), the solid material discharging opening that is positioned at the extruder (18) of heating kettle (17) bottom be connected with inclined screw conveyer C (11-c) and with mass transport to drying subsystem D; The liquid material discharging opening of extruder (18) is connected with Separation of Solid and Liquid subsystem C-1 through pipeline;
The solid material that gets into oven dry subsystem D through said inclined screw conveyer C (11-c) is input to dryer (19); Conveying worm B (6-b) is arranged under the discharging opening of dryer (19); The output of said conveying worm B (6-b) is connected with inclined screw conveyer D (11-d), and the output of said inclined screw conveyer D (11-d) is connected with packing subsystem F;
The mass transport that gets into packing subsystem F through said inclined screw conveyer D (11-d) arrives cooler (22); Be provided with conveying worm C (6-c) under cooler (22) discharging opening; Said conveying worm C (6-c) is connected with bucket elevator A (24-a); Said bucket elevator A (24-a) is connected with bucket elevator B (24-b) through pulverizer (25), and said bucket elevator B (24-b) discharging opening is connected with packing machine (27);
The material of importing Separation of Solid and Liquid subsystem C-2 from the rubbish seperator (4) of batch turning letter sorting subsystem A through pipeline is connected with temporary jar (7); Temporary jar (7) are connected with oil-water separator (10); The oil that oil-water separator (10) comes out leads to crude oil pond (39), and sewage is discharged by sewer; The liquid material that transports through pipe from the extruder (18) that adds hot extrusion subsystem B gets into Separation of Solid and Liquid subsystem C-1; The liquid material pipeline is connected with fluid reservoir A (30-a) and fluid reservoir B (30-b); Said fluid reservoir A (30-a) and fluid reservoir B (30-b) are connected with horizontal centrifuge (31), and the isolated liquid of horizontal centrifuge (31) is connected with water-oil separating subsystem E through liquid storage pool (33) and pump A (35-a);
Water-oil separating subsystem E is connected with Separation of Solid and Liquid subsystem C-1 through said pump A (35-a); The liquid that said pump A (35-a) gets gets into heating kettle A (36-a), heating kettle B (36-b), heating kettle C (36-c); Said heating kettle A (36-a), heating kettle B (36-b), heating kettle C (36-c) top are connected with the agent jar (51) of wadding a quilt with cotton with fixed attention; Said heating kettle A (36-a), heating kettle B (36-b), heating kettle C (36-c) bottom discharge mouth are connected with butterfly centrifugal machine (38); Butterfly centrifugal machine (38) discharging opening is connected with crude oil pond (39); Crude oil is squeezed into vacuum dehydration pot (40) top through pump B (35-b), and the oil of discharging from vacuum dehydration pot (40) bottom comes together in refining crude oil jar (48) behind steam reciprocating pump (42), filter (43).
2. changing food waste total system according to claim 1 is characterized in that: the vibratory sieve (13) that adds among the hot extrusion subsystem B also is connected with blower fan A (12-a), deduster (14), separator (15), airlock (16).
3. changing food waste total system according to claim 1 is characterized in that: the dryer (19) of oven dry subsystem D also is connected with compensator (20), blower fan B (12-b), blast pipe (21).
4. a changing food waste integrated conduct method is characterized in that this method contains batch turning letter sorting operation A, heating extrusion process B, solid-liquid separation process C-1 and C-2, baking operation D, water-oil separating operation E, packaging process F, and each process operations is following:
Batch turning letter sorting operation A is the operation foremost of this method, and the kitchen garbage truck (1) of having a dinner, refuse hopper (3), driving (2) the batch (-type) ground that cooperatively interacts is poured rubbish in the rubbish seperator (4) into; In rubbish seperator (4), the solid in the rubbish is divided into big assorted and little assorted; Be transported to Roughpulverizer (9) after big assorted magnetic separator (8) through belt conveyor (5) upper end is selected the iron content solid, little the mixing that Roughpulverizer (9) will mix after the coarse crushing greatly and rubbish seperator (4) comes out transported to inclined screw conveyer A (11-a) through conveying worm A (6-a) together; Said inclined screw conveyer A (11-a) is sent to heating extrusion process B with material; The liquid material that from rubbish seperator (4), comes out is sent to solid-liquid separation process C-2 by the road;
The material that is transported to heating extrusion process B through said inclined screw conveyer A (11-a) gets into vibratory sieve (13); Through vibratory sieve (13) dirty gas is discharged; The material that comes out is transported to heating kettle (17) through inclined screw conveyer B (11-b); In heating kettle (17) with pressure 0.1MPa, after under 40 ℃~50 ℃ conditions of temperature material being heated; Material enters in the extruder (18), and the solid material that comes out from extruder (18) is transported to baking operation D through inclined screw conveyer C (11-c); The liquid material that extruder (18) comes out is transported to solid-liquid separation process C-1 through pipeline;
The solid material of transporting to baking operation D is input to the water of dryer (19), vapour is discharged through compensator (20), blower fan B (12-b) and blast pipe (21); The material of oven dry is sent to packaging process F through conveying worm B (6-b) and inclined screw conveyer D (11-d) with material in dryer (19);
The mass transport that gets into packaging process F through said inclined screw conveyer D (11-d) is cooled off after said conveying worm C (6-c) sends into bucket elevator A (24-a) to cooler (22); Said bucket elevator A (24-a) promotes material and send in the pulverizer (25); Pulverizer (25) granular material that comes out is sent to packing machine (27) through bucket elevator B (24-b) and packs; This packing product is composite protein feed, and protein content reaches 20~33.5% in the composite protein feed;
Send into temporary jar (7) from the liquid material that the rubbish seperator (4) of batch turning letter sorting operation A comes out through pipeline input solid-liquid separation process C-2; Material in temporary jar (7) is sent into oil-water separator (10); The oil of separating through oil-water separator (10) is sent to crude oil pond (39), and sewage is discharged by sewer;
After the liquid material that comes out from the extruder (18) of heating extrusion process B is sent into Separation of Solid and Liquid subsystem C-1; Liquid material is input among fluid reservoir A (30-a) and the fluid reservoir B (30-b) by the road; Said fluid reservoir A (30-a) and fluid reservoir B (30-b) are input to liquid material the horizontal centrifuge (31) from its bottom, are sent to water-oil separating operation E through the isolated liquid of horizontal centrifuge (31) through liquid storage tank (33) and pump A (35-a);
Be driven into heating kettle A (36-a), heating kettle B (36-b), heating kettle C (36-c) through said pump A (35-a) from the liquid that solid-liquid separation process C-1 gets to water-oil separating operation E; The agent jar (51) of wadding a quilt with cotton with fixed attention injects the agent of wadding a quilt with cotton with fixed attention to accelerate separation process from said heating kettle A (36-a), heating kettle B (36-b), heating kettle C (36-c) top; The heating kettle temperature is 70 ℃~95 ℃, and speed of agitator is 30-60 rev/min; The material that comes out from said heating kettle A (36-a), heating kettle B (36-b), heating kettle C (36-c) bottom is input to the butterfly centrifugal machine (38) and carries out the breakdown of emulsion process; Butterfly centrifugal machine (38) output material gets into crude oil pond (39); Crude oil is squeezed into vacuum dehydration pot (40) top through pump B (35-b) in the crude oil pond (39); Vacuum 0.65~1.3KPa in the vacuum dehydration pot (40); Heat 90 ± 5 ℃, the oil that temperature retention time 30~40min discharges from vacuum dehydration pot (40) bottom comes together in refining crude oil jar (48) behind steam reciprocating pump (42), filter (43); Refining crude oil in the refining crude oil jar (48) is transported to the deep processing operation, can be used to make biodiesel and soap powder; The waste liquid of discharging in the vacuum dehydration pot (40) is as liquid fertilizer.
5. changing food waste integrated conduct method according to claim 4; It is characterized in that: in heating extrusion process B; The solid material that comes out from extruder (18) is transported to before the baking operation D through said inclined screw conveyer C (11-c); Earlier solid material is transferred in other the reactor, will be fermented the back mass transport to baking operation D through said inclined screw conveyer C (11-c) again after fermenting; Described fermentation condition is: screening geotrichum candidum F-1, aspergillus oryzae F-6 carries out the dominant bacteria combination, medium preparation: fermentation medium high-temperature sterilization 20min adds 1~5% (NH 4) 2SO 4, 1~8%KH 2PO 4, 1~6%NaCl, initial pH5.5, moisture content 60 ± 2%; Fermentation seed liquid 15%, inoculative proportion are 1: 1, and fermentation time is 5 days.
6. changing food waste integrated conduct method according to claim 4 is characterized in that: the agent of wadding a quilt with cotton with fixed attention in the agent jar (51) of wadding a quilt with cotton with fixed attention is one or more the mixture in ferric trichloride, aluminium polychloride, ferrous sulfate, aluminum sulfate, bentonite, the alum.
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