CN105436196A - Kitchen garbage all-material oil removing system and oil removing method - Google Patents
Kitchen garbage all-material oil removing system and oil removing method Download PDFInfo
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- CN105436196A CN105436196A CN201511024720.2A CN201511024720A CN105436196A CN 105436196 A CN105436196 A CN 105436196A CN 201511024720 A CN201511024720 A CN 201511024720A CN 105436196 A CN105436196 A CN 105436196A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
- B09B3/45—Steam treatment, e.g. supercritical water gasification or oxidation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Abstract
The invention discloses a kitchen garbage all-material oil removing system and an oil removing method, wherein the system comprises a homogeneous sand removing unit for removing massive impurities in kitchen garbage, a heating and sand removing unit communicated with the homogeneous sand removing unit for heating and removing small impurities in the kitchen garbage, and a three-phase separation unit connected with the heating and sand removing unit for separating an oil phase, a solid phase and a water phase of the kitchen garbage, wherein the homogeneous sand removing unit and the heating and sand removing unit are communicated through a first connecting pipe; the heating and sand removing unit and the three-phase separation unit are communicated through a second connecting pipe; a three-phase centrifuge is provided with an oil phase outlet, a solid phase outlet and a water phase outlet; the oil phase outlet is connected to an oil tank through an oil supply pipe; and the water phase outlet is connected to an anaerobic jar through a liquid supply pipe after being joined with the solid phase outlet. The kitchen garbage all-material oil removing system and the oil removing method have the beneficial effects of realizing effective removal of grease in the kitchen garbage and realizing reuse of the grease.
Description
Technical field
The present invention relates to removing oil from kitchen waste treatment facility, particularly relate to a kind of changing food waste total matter oil removing system and deoiling method.
Background technology
In recent years along with the develop rapidly of China's economy, numerous dining rooms, restaurant, hotel produce a large amount of changing food wastes every day.Food and drink waste water, as a kind of solid waste rubbish of floorboard with high oil content, becomes an important pollution entering the water gradually.If not treated and arbitrarily discharge, pollute the environment, spread disease germs.A large amount of greases, by urban drainage pipe network, very easily sticks on the inwall of sewer pipe, accumulates over a long period and make pipeline actual circulation area more and more less, affect the unimpeded of pipe-line system.And after oily waste water flows into extraneous water source, water source generation eutrophication can be made, threaten the living environment of people and healthy.
Simultaneously food wastes is rich in various meat and animals and plants wet goods and has higher recycle value.Face energy starved today in the whole world, the grease in food garbage can be used as the better raw material of one of production biodiesel.
But China emerges in an endless stream to reclaiming the social concerns such as the effective technology of food garbage also exists many deficiencies, and contaminated environment, the wasting of resources, waste oil remain incessant after repeated prohibition at present.Prior art can be summarized as four large classes: physical separation is (as Gravity Separation technology, centrifugal separation technology, Coalescence-separation Technology, membrane separation technique etc.), Chemical Decomposition is (as flocculation sediment isolation technics, acidifying isolation technics, chemical oxidation isolation technics, photochemical catalysis oxidation isolation technics etc.), physical chemistry is separated (as floatation separating technology, adsorption separation technology, magnetic suck isolation technics etc.) be separated (as biomembrane isolation technics with biochemistry, activated sludge isolation technics etc.).Traditional to leave standstill, the separation method such as high speed centrifugation exists following problem: 1) treating capacity is limited, and can not process high-concentration kitchen waste slurries; 2) only carry out oil removing for changing food waste liquid phase, changing food waste solid phase is not processed, and through measuring and calculating and actual motion, containing Chuck Steak in solid phase, therefore this technique oil removal efficiency is not high; 3) simultaneously, the emerging separation method such as electricity flocculation, magnetic flocculation, biological activated carbon is adopted can to bring larger electric energy loss; 4) stricter to the water quality requirement of water inlet.
Summary of the invention
The object of this invention is to provide a kind of changing food waste total matter oil removing system and deoiling method, achieve the grease effectively removed in changing food waste, and achieve the reuse of grease.
The object of the invention is to realize by the following technical solutions:
The invention provides a kind of changing food waste total matter oil removing system, comprising: homogeneous desanding unit, in it, being provided with three grades of sand removing separators for removing the bulk impurity in changing food waste; Heating desanding unit, is provided with the heater for heating changing food waste and is provided with two points of devices for removing the fritter impurity in changing food waste in it; And three phase separation unit, be provided with the three-phase centrifuge for separating of the oil phase of changing food waste, solid phase and aqueous phase in it; Wherein, be communicated with by the first connecting pipe between homogeneous desanding unit with heating desanding unit, heating desanding unit is communicated with by the second connecting pipe with between three phase separation unit, three-phase centrifuge is provided with oil phase outlet, solid-phase outlet and aqueous phase outlet, oil phase outlet, by sending oil-piping to be connected to oil tank, is connected to anaerobic jar by liquor charging pipeline after aqueous phase outlet converges with solid-phase outlet.
Preferably, also comprise heat exchange unit, heat exchanger is provided with in heat exchange unit, the refrigerant passage of heat exchanger passes through for the first connecting pipe, the hot coal passage of heat exchanger passes through for liquor charging pipeline, and heat exchange unit is in order to pass to material in the first connecting pipe by the heat of the high-temperature material after oil removing in liquor charging pipeline.Because the heat of the changing food waste exported by three phase separation unit is too high, incompatible with anaerobic jar interior reaction temperature.Therefore heat exchange unit is utilized, the heat of the changing food waste exported by three phase separation unit passes to the changing food waste of homogeneous desanding unit output, not only can reduce the temperature of the changing food waste that three phase separation unit exports, and the temperature of the changing food waste that homogeneous desanding unit exports can be raised, achieve the changing food waste that before entering heating desanding unit, pre-thermally homogenising desanding unit exports, reduce the consumption at heating desanding unit heat, the heat of the changing food waste that the three phase separation unit made full use of exports, achieves heat energy recycle.
Preferably, homogeneous desanding unit comprises: for putting into the first homogeneous pond of changing food waste, the first homogeneous pond is communicated with three grades of sand removing separators; And the second homogeneous pond to be communicated with three grades of sand removing separators, remove the changing food waste after bulk impurity for buffer memory; Wherein, the pipeline between the first homogeneous pond and three grades of sand removing separators is provided with the first sand pump, and the second homogeneous pond is connected with the first connecting pipe, and the first connecting pipe is provided with the second sand pump.Design the first homogeneous pond, realize buffer memory changing food waste; Design three grades of sand removing separators, achieve bulk Impurity removal, greatly can reduce the bulk such as sand, slag impurity to the abrasion condition of follow-up equipment, reduce the blocking to subsequent pipeline, reduce sand removal, the work such as clear and coherent, better ensure that follow-up equipment normally runs; Design the second homogeneous pond, for the output of homogeneous desanding unit to follow up device prepares, achieve the changing food waste into follow up device sustainable supply removing bulk impurity.
Preferably, heating desanding unit comprises: be the boiler of heater input steam, for providing thermal source for heater; And the pump pond to be connected with two points of devices, for the changing food waste after buffer memory heating; Wherein, be connected with the second connecting pipe in pump pond, the second connecting pipe is provided with the second elevator pump.In heater, changing food waste is heated to 90 DEG C ~ 95 DEG C, the grease solidified in heater can dissolve, and laterally stir changing food waste by the long shaft of in the cylinder of heater, changing food waste is migrated in the heater so that horizontal plug is streamed, heat while stir, thus realize homogenizing heating changing food waste.After being heated to technological requirement temperature, total matter enters in two-phase two points of devices and carries out desanding, and sand is transported to outdoor sand loading case by receiving sand hopper; The changing food waste obtained enters pump pond, then sends into three phase separation unit by the second elevator pump.
Preferably, send on oil-piping and be connected with vibratory sieve, oil storage pool and oil pump in turn, used by oscillating screen is in except the interior impurity that deoils, and oil storage pool is used for buffer memory oil, and oil pump is used for oil in oil storage pool to be pumped in oil tank.Because the oil obtained through three-phase centrifuge process is still containing impurity, achieves Impurity removal in oil, improve oil content; Design oil storage pool, achieves continuous reception and the buffer memory oil from vibratory sieve, for the output of oil prepares; Design oil pump is that the output of oil provides power, reduces the requirement to oil tank riding position.
Preferably, liquor charging pipeline is disposed with premixing tank and the 3rd elevator pump, in premixing tank, is provided with agitator.Owing to containing anaerobic organic matter in remaining solid, anaerobic organic matter is the main participation material of anaerobic reaction in anaerobic jar, if remaining solid is not mixed with water, carrying out in order of anaerobic reaction in anaerobic jar will be affected, therefore, after water and residue fixedly can only being mixed, just can be sent in anaerobic jar.By arranging premixing tank, achieving and water and remaining solid are buffered in premixing tank; By use agitator, achieve and water and remaining solid mixed, for anaerobic reaction in anaerobic jar carry out in order provide condition.
Preferably, the end of the first connecting pipe access heat exchanger is provided with the first elevator pump.After changing food waste pumps by the second sand pump of homogeneous desanding unit, the kinetic energy of changing food waste is not enough to enter into heat exchanger.Therefore design the first elevator pump, again increase the kinetic energy of changing food waste, can heat exchanger be entered into make changing food waste.
Preferably, heatproof heat-insulation layer is set outside the cylinder of heater.The security protection problem such as prevent that personnel from scalding.
The present invention also provides a kind of deoiling method on the basis of above-mentioned changing food waste total matter oil removing system, comprising:
Except bulk impurity: use the bulk impurity in three grades of sand removing separators removal changing food wastes in homogeneous desanding unit;
Heat and remove fritter impurity: receiving a changing food waste after homogeneous desanding cell processing by the first connecting pipe, use the heater of heating desanding unit to heat this changing food waste, and use the fritter impurity in two points of devices removal changing food wastes of heating desanding unit;
Be separated fuel-displaced: receive the secondary changing food waste after heating desanding cell processing by the second connecting pipe, then the three-phase centrifuge of three phase separation unit is used to be separated the oil phase of this secondary changing food waste, solid phase and aqueous phase, and the oil after being separated is flowed to oil tank by sending oil-piping, give anaerobic jar by the solid after separation and water conveying liquid pipeline.
Preferably, carrying out heating and before removing fritter impurity, carrying out the pre-heat treatment, use heat exchange unit, the heat of the high-temperature material after oil removing in liquor charging pipeline is passed to material in the first connecting pipe.Because the heat of the changing food waste exported by three phase separation unit is too high, incompatible with anaerobic jar interior reaction temperature.Therefore heat exchange unit is utilized, the heat of the changing food waste exported by three phase separation unit passes to the changing food waste of homogeneous desanding unit output, not only can reduce the temperature of the changing food waste that three phase separation unit exports, and the temperature of the changing food waste that homogeneous desanding unit exports can be raised, achieve the changing food waste that before entering heating desanding unit, pre-thermally homogenising desanding unit exports, reduce the consumption at heating desanding unit heat, the heat of the changing food waste that the three phase separation unit made full use of exports, achieves heat energy recycle.
Owing to have employed technique scheme, the present invention has the following advantages:
1) by design homogeneous desanding unit, heat exchange unit, heating desanding unit and three phase separation unit, the continuous deoiling process of automation is realized;
2) bulk impurity is removed and fritter impurity is that three phase separation unit has cleared away obstacle through twice desanding process; By preheating and heating, make changing food waste reach 90 DEG C ~ 95 DEG C, melted by oil, for oil is separated the condition of providing by three phase separation unit, the solid in the changing food waste simultaneously after heating is also more prone to separating treatment; By arranging vibratory sieve, the oil separated is screened again, thus whole system achieves the oil in the changing food waste total matter extracting high concentration;
3) heat exchange unit is used, recovery and the utilization of heat are taken into full account, the changing food waste that the changing food waste utilizing three phase separation unit to export and homogeneous desanding unit export carries out heat exchange, and when having saved heating, boiler provides quantity of steam, decreases the consumption of the energy; After the kitchen waste heat exchange that exports of three phase separation unit, temperature reaches the requirement of anaerobic digestion in addition, directly can entering anaerobic jar, without the need to again heating slurries, again reducing the consumption of the energy;
4) adopt homogeneous desanding unit all to achieve the removing to impurity with heating desanding unit, elimination effect is good;
5) whole system is airtight, efficient, energy-conservation, stable operation can be realized, and by total matter thermophilic digestion and three phase separation, oil removal rate more than 95% can be reached, achieve the recovery to oil in changing food waste, improve the economic benefit of changing food waste process, and to reduce in oil LCFA to the inhibitory action of follow-up anaerobic fermentation of kitchen waste.
Accompanying drawing explanation
Fig. 1 is the structural representation of changing food waste total matter oil removing system;
Fig. 2 is the flow chart of deoiling method.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reach object and effect clearly and be easy to understand, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated:
As shown in Figure 1, the present embodiment provides a kind of changing food waste total matter oil removing system, comprising: homogeneous desanding unit 1, for removing the bulk impurity in changing food waste; The heating desanding unit 2 be communicated with homogeneous desanding unit 1, for heating changing food waste and removing the fritter impurity in changing food waste; And the three phase separation unit 3 to be communicated with heating desanding unit 2, for separating of the oil phase of changing food waste, solid phase and aqueous phase.
Wherein, be communicated with by the first connecting pipe 71 between homogeneous desanding unit 1 with heating desanding unit 2, heating desanding unit 2 is communicated with by the second connecting pipe 72 with between three phase separation unit 3, the three-phase centrifuge 31 be connected with the second connecting pipe 72 is provided with in three phase separation unit 3, the oil-out of three-phase centrifuge 31 is connected to oil tank by sending oil-piping 73, is connected to anaerobic jar 5 after the delivery port of three-phase centrifuge 31 and oil-out converge by liquor charging pipeline 74.
Changing food waste total matter oil removing system also comprises heat exchange unit 4, heat exchanger 41 is provided with in heat exchange unit 4, the refrigerant passage of heat exchanger 41 passes through for the first connecting pipe 71, the hot coal passage of heat exchanger 41 passes through for liquor charging pipeline 74, and heat exchange unit 4 is in order to pass to material in the first connecting pipe 71 by the heat of the high-temperature material after oil removing in liquor charging pipeline 74.The end accessing heat exchanger 41 in the first connecting pipe 71 is provided with the first elevator pump 42.
Homogeneous desanding unit 1 comprises: for putting into the first homogeneous pond 11 of changing food waste; The three grades of sand removing separators 12 be communicated with the first homogeneous pond 11, for removing the bulk impurity in changing food waste; And the second homogeneous pond 13 to be communicated with three grades of sand removing separators 12, remove the changing food waste after bulk impurity for buffer memory; Wherein, the pipeline between the first homogeneous pond 11 and three grades of sand removing separators 12 is provided with the first sand pump 14, second homogeneous pond 13 and is connected with the first connecting pipe 71, and the first connecting pipe 71 is provided with the second sand pump 15.
Heating desanding unit 2 comprises: the heater 21 be connected with the first connecting pipe 71, for heating changing food waste; For heater 21 inputs the boiler 22 of steam, for providing thermal source for heater 21; The two points of devices 24 be connected with heater 21, for removing the fritter impurity in changing food waste; And the pump pond 23 to be connected with two points of devices 24, for the changing food waste after buffer memory heating; Wherein, be connected with the second connecting pipe 72 in pump pond 23.Second connecting pipe 72 is connected with the second elevator pump 38.Heatproof heat-insulation layer is set outside the cylinder of heater 21.
Send on oil-piping 73 and be connected with vibratory sieve 32, oil storage pool 33 and oil pump 34 in turn, vibratory sieve 32 is for except the interior impurity that deoils, and oil storage pool 33 is for buffer memory oil, and oil pump 34 is for entering oil pump 34 in oil storage pool 33 in oil tank.Liquor charging pipeline 74 is disposed with premixing tank 35 and the 3rd elevator pump 36, in premixing tank 35, is provided with agitator 37.
As shown in Figure 2, the present embodiment also provides a kind of deoiling method on above-mentioned changing food waste total matter oil removing system basis, comprising:
Except bulk impurity s1: three grades of sand removing separators 12 in use homogeneous desanding unit 1 remove the bulk impurity in changing food waste;
Heat and remove fritter impurity s2: receiving a changing food waste after the process of homogeneous desanding unit 1 by the first tube connector 71 road, use the heater 21 of heating desanding unit 2 to heat this changing food waste, and the fritter impurity in changing food waste removed by two points of devices 24 of use heating desanding unit 2;
Be separated fuel-displaced s3: receive the secondary changing food waste after heating desanding unit 2 processes by the second connecting pipe 72, then the three-phase centrifuge 31 of three phase separation unit 3 is used to be separated the oil phase of this secondary changing food waste, solid phase and aqueous phase, and the oil after being separated is flowed to oil tank by sending oil-piping 73, give anaerobic jar by the solid after separation and water conveying liquid pipeline 74.
Wherein, carrying out heating and before removing fritter impurity, carrying out the pre-heat treatment, use heat exchange unit 4, the heat of the high-temperature material after oil removing in liquor charging pipeline 74 is passed to material in the first connecting pipe 71.
The operation principle of the present embodiment: except bulk impurity s1: except bulk impurity, homogeneous desanding unit 1 can run continuous 24 hours of every day, first, was poured into by changing food waste in the first homogeneous pond 11; Then, changing food waste is pumped in three grades of sand removing separators 12 under the effect of the first sand pump 14, three grades of sand removing separators 12 effectively remove the bulk impurity such as sandstone, pottery and the glass fragment entered in total matter, greatly can reduce the bulk such as sand, slag impurity to the abrasion condition of follow-up equipment, reduce the blocking to subsequent pipeline, reduce sand removal, the work such as clear and coherent, better ensure that follow-up equipment normally runs; Again, the changing food waste that three grades of sand removing separators 12 obtain is deposited in the second homogeneous pond 13, exports changing food waste by the second sand pump 15 to next device.
Carry out the pre-heat treatment: use heat exchange unit 4, the heat of the changing food waste utilizing three phase separation unit 3 to export, the changing food waste that pre-thermally homogenising desanding unit 1 exports, not only can reduce the temperature of the high-temperature material after the oil removing of three phase separation unit 3 output, reach the technological requirement into anaerobic jar 5, and the temperature of the changing food waste that homogeneous desanding unit 1 exports can be raised, achieve the changing food waste that before entering heating desanding unit 2, pre-thermally homogenising desanding unit 1 exports, reduce the consumption at heating desanding unit 2 heat, the heat of the high-temperature material after the oil removing that the three phase separation unit 3 made full use of exports, achieve heat energy recycle.
Heat and remove fritter impurity s2: heat and remove fritter impurity, in heater 21, a changing food waste is heated to 90 DEG C ~ 95 DEG C, the grease solidified in heater 21 can dissolve, and laterally stir a changing food waste by the long shaft of in the cylinder of heater 21, one time changing food waste is migrated in heater 21 so that horizontal plug is streamed, heat while stir, thus realize homogenizing adding a changing food waste.After being heated to technological requirement temperature, total matter enters in two-phase two points of devices 24 and carries out desanding, and sand is transported to outdoor sand loading case by receiving sand hopper; The changing food waste obtained enters pump pond 23, then sends into three phase separation unit 3 by the second elevator pump 38.
Be separated fuel-displaced s3: be separated fuel-displaced, secondary changing food waste after intensification delivers to three-phase separator, with spiral, three phase separation is carried out to three seperators by centrifugal, isolate oil phase, solid phase and aqueous phase, for the discharging spiral of material particular design easy to wear, spiral and stock distributor do abrasionproof conservation treatment, and the high-temperature material after the oil removing that three-phase centrifuge 31 exports is stirred by agitator 37 in premixing tank 35, is then flowing to anaerobic jar 5 by liquor charging pipeline 74; Three-phase centrifuge 31 export oil through vibratory sieve 32 removal of impurities again, and then in oil storage pool 33 buffer memory, by oil pump 34 by oily sustainable supply oil tank.
Although embodiment of the present invention are open as above, but it is not restricted to listed in description and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (10)
1. a changing food waste total matter oil removing system, is characterized in that, comprising:
Homogeneous desanding unit, is provided with three grades of sand removing separators for removing the bulk impurity in changing food waste in it;
Heating desanding unit, is provided with the heater for heating changing food waste and is provided with two points of devices for removing the fritter impurity in changing food waste in it; And
Three phase separation unit, is provided with the three-phase centrifuge for separating of the oil phase of changing food waste, solid phase and aqueous phase in it;
Wherein, be communicated with by the first connecting pipe between homogeneous desanding unit with heating desanding unit, heating desanding unit is communicated with by the second connecting pipe with between three phase separation unit, three-phase centrifuge is provided with oil phase outlet, solid-phase outlet and aqueous phase outlet, oil phase outlet, by sending oil-piping to be connected to oil tank, is connected to anaerobic jar by liquor charging pipeline after aqueous phase outlet converges with solid-phase outlet.
2. changing food waste total matter oil removing system according to claim 1, it is characterized in that, also comprise heat exchange unit, heat exchanger is provided with in heat exchange unit, the refrigerant passage of heat exchanger passes through for the first connecting pipe, the hot coal passage of heat exchanger passes through for liquor charging pipeline, and heat exchange unit is in order to pass to material in the first connecting pipe by the heat of the high-temperature material after oil removing in liquor charging pipeline.
3. changing food waste total matter oil removing system according to claim 1, is characterized in that, homogeneous desanding unit comprises:
For putting into the first homogeneous pond of changing food waste, the first homogeneous pond is communicated with three grades of sand removing separators; And
The the second homogeneous pond be communicated with three grades of sand removing separators, removes the changing food waste after bulk impurity for buffer memory;
Wherein, the pipeline between the first homogeneous pond and three grades of sand removing separators is provided with the first sand pump, and the second homogeneous pond is connected with the first connecting pipe, and the first connecting pipe is provided with the second sand pump.
4. changing food waste total matter oil removing system according to claim 1, is characterized in that, heating desanding unit comprises:
For the boiler of heater input steam, for providing thermal source for heater; And
The pump pond be connected with two points of devices, for the changing food waste after buffer memory heating;
Wherein, be connected with the second connecting pipe in pump pond, the second connecting pipe is provided with the second elevator pump.
5. changing food waste total matter oil removing system according to claim 1, it is characterized in that, send on oil-piping and be connected with vibratory sieve, oil storage pool and oil pump in turn, used by oscillating screen is in except the interior impurity that deoils, oil storage pool is used for buffer memory oil, and oil pump is used for oil in oil storage pool to be pumped in oil tank.
6. changing food waste total matter oil removing system according to claim 1, is characterized in that, liquor charging pipeline is disposed with premixing tank and the 3rd elevator pump, is provided with agitator in premixing tank.
7. changing food waste total matter oil removing system according to claim 2, is characterized in that, the end of the first connecting pipe access heat exchanger is provided with the first elevator pump.
8. changing food waste total matter oil removing system according to claim 4, is characterized in that, arrange heatproof heat-insulation layer outside the cylinder of heater.
9. adopt the deoiling method described in any one of claim 1-8, it is characterized in that, comprising:
Except bulk impurity: use the bulk impurity in three grades of sand removing separators removal changing food wastes in homogeneous desanding unit;
Heat and remove fritter impurity: receiving a changing food waste after homogeneous desanding cell processing by the first connecting pipe, use the heater of heating desanding unit to heat this changing food waste, and use the fritter impurity in two points of devices removal changing food wastes of heating desanding unit;
Be separated fuel-displaced: receive the secondary changing food waste after heating desanding cell processing by the second connecting pipe, then the three-phase centrifuge of three phase separation unit is used to be separated the oil phase of this secondary changing food waste, solid phase and aqueous phase, and the oil after being separated is flowed to oil tank by sending oil-piping, give anaerobic jar by the solid after separation and water conveying liquid pipeline.
10. changing food waste total matter deoiling method according to claim 9, it is characterized in that, carrying out heating and before removing fritter impurity, carrying out the pre-heat treatment, use heat exchange unit, the heat of the high-temperature material after oil removing in liquor charging pipeline is passed to material in the first connecting pipe.
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