CN212168492U - Wet-heat hydrolysis pretreatment system for kitchen waste - Google Patents
Wet-heat hydrolysis pretreatment system for kitchen waste Download PDFInfo
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- CN212168492U CN212168492U CN202020509467.XU CN202020509467U CN212168492U CN 212168492 U CN212168492 U CN 212168492U CN 202020509467 U CN202020509467 U CN 202020509467U CN 212168492 U CN212168492 U CN 212168492U
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Abstract
The utility model discloses a kitchen garbage wet heat hydrolysis pretreatment system belongs to kitchen garbage processing technology field. The technical scheme is as follows: comprises a material receiving bin, a wet-hot hydrolysis tank, a buffer bin, an extrusion dehydrator, a heating homogeneous buffer bin, a three-phase horizontal screw centrifuge and a waste gas treatment system. The utility model provides a problem with high costs that the frequent change of the spiral piece that leads to of breaker broken hammer leaf and three-phase separating centrifuge that exists among the traditional broken preliminary treatment technology of selecting separately, compare with traditional broken pulping process of selecting separately, this process systems total investment reduces more than 50%, and the running cost reduces 30% than traditional technology.
Description
Technical Field
The utility model relates to a kitchen garbage handles technical field, concretely relates to kitchen garbage wet heat hydrolysis pretreatment system and wet heat hydrolysis pretreatment process.
Background
The ingredients of the kitchen waste are very complex, and besides leftovers and leftovers, hard sundries such as broken dinner plates and wine cups can be generated, so that a lot of difficulties are brought to the treatment of the kitchen waste.
In the current treatment process of the kitchen waste, the kitchen waste is usually pretreated and then subjected to anaerobic treatment, so that the burden of the anaerobic treatment is greatly reduced. The common pretreatment process is to crush the kitchen waste into fragments by a crusher, then sort out impurities in the fragments, and finally perform three-phase separation on the sorted materials to finish the pretreatment of the kitchen waste. However, there are many problems with this pretreatment process: 1. the crusher is expensive, hard impurities in the kitchen waste can cause serious abrasion to the crusher and the three-phase separator, a crushing hammer sheet of the crusher and a spiral sheet of the three-phase separator need to be frequently replaced, the crushing hammer sheet and the spiral sheet are made of alloy materials, and the cost is too high; 2. during sorting, sorted impurities also contain more organic matters, so that the organic matters are wasted, and the organic matter extraction rate is low; 3. the sorted materials can have hard impurities remained after three-phase separation, which is not beneficial to the subsequent anaerobic treatment.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the wet-heat hydrolysis pretreatment system and the wet-heat hydrolysis pretreatment process for the kitchen waste are provided, the problem of high cost caused by frequent replacement of a crusher crushing hammer sheet and a spiral sheet of a three-phase separator in the traditional crushing and sorting pretreatment process is solved, compared with the traditional crushing and sorting pulping process, the total investment of the process system is reduced by more than 50%, and the operation cost is reduced by 30% compared with the traditional process.
The technical scheme of the utility model is that:
in a first aspect, the utility model provides a kitchen waste wet and hot hydrolysis pretreatment system, which comprises a material receiving bin, a wet and hot hydrolysis tank, a buffer bin, an extrusion dehydrator, a heating homogeneous buffer tank, a three-phase horizontal spiral centrifuge and a waste gas treatment system; a first filtering mechanism is arranged at a feed inlet of the receiving bin, a second filtering mechanism is arranged at a solid-phase material outlet, a first material conveying mechanism is arranged at the second filtering mechanism, a spiral conveyor is arranged between the solid-phase material outlet of the receiving bin and a solid-phase material inlet of the wet-heat hydrolysis tank, and a liquid-phase material outlet at the bottom of the receiving bin is connected with the liquid-phase material inlet of the wet-heat hydrolysis tank through a pipeline; a material outlet of the wet-hot hydrolysis tank is horizontally provided with a stirring conveying shaft, the stirring conveying shaft is driven by a motor, stirring blades are spirally arranged on the stirring conveying shaft, an air outlet of the wet-hot hydrolysis tank is connected with a waste gas treatment system through a pipeline, the wet-hot hydrolysis tank is also provided with a heating medium inlet and a heating medium outlet, and a spiral draining conveyor is arranged between the material outlet of the wet-hot hydrolysis tank and a feed inlet of the buffer bin; a third filtering mechanism is arranged at the lower end of a spiral shaft of the spiral draining conveyor, a filtrate tank is arranged at the bottom of the spiral draining conveyor and opposite to the feed inlet, and a liquid-phase material outlet at the bottom of the filtrate tank is connected with the feed inlet of the heating homogenization buffer tank through a pipeline; a fourth filtering mechanism is arranged at a solid-phase material outlet of the buffer bin, a second material conveying mechanism is arranged at the fourth filtering mechanism, a liquid-phase material outlet at the bottom of the buffer bin is communicated with a filtrate tank of the spiral draining conveyor through a pipeline, an air outlet of the buffer bin is connected with an exhaust gas treatment system through a pipeline, and a spiral conveyor and a spiral screening conveyor are arranged between the solid-phase material outlet of the buffer bin and a feed inlet of the extrusion dehydrator; a fifth filtering mechanism is arranged at the lower end of a spiral shaft of the spiral screening conveyor, a feed inlet of the spiral screening conveyor is positioned below a discharge outlet of the spiral conveyor at a solid-phase material outlet of the cache bin, a small material outlet at the bottom of the spiral screening conveyor is connected with a feed inlet of the extrusion dehydrator, and a spiral conveyor is also arranged below a large material outlet; the extrusion dehydrator is provided with a solid-phase material outlet and a liquid-phase material outlet, and the liquid-phase material outlet of the extrusion dehydrator is connected with the feed inlet of the heating homogenization buffer tank through a pipeline; a heating coil and a stirring mechanism are arranged in the heating homogenization buffer tank, a discharge port of the heating homogenization buffer tank is connected with a feed port of the three-phase horizontal spiral centrifugal machine through a pipeline, and an air outlet of the heating homogenization buffer tank is connected with a waste gas treatment system through a pipeline; the three-phase horizontal screw centrifuge is provided with a water outlet, an oil outlet and a slag outlet, and the oil outlet is connected with the oil storage tank through a pipeline.
Preferably, the first filtering mechanism comprises a plurality of rotating shafts driven by a motor, two rows of fin shafts are oppositely arranged on each rotating shaft along the length direction, two adjacent rows of fin shafts of two adjacent rotating shafts are arranged in a staggered manner, and the distance between the adjacent fin shafts of the two adjacent rotating shafts is 8 cm; the second filtering mechanism, the third filtering mechanism, the fourth filtering mechanism and the fifth filtering mechanism are all screens; the screen cloth in the spiral draining conveyer and the screen cloth aperture in the buffer bin are both 5mm, and the screen cloth aperture in the spiral screening conveyer is 4 cm.
Preferably, the first material conveying mechanism is a first conveying shaft driven by a motor, the first conveying shaft is arranged above a screen at a solid-phase material outlet of the material receiving bin, and a conveying blade is spirally arranged on the first conveying shaft; the second material conveying mechanism is a second conveying shaft driven by a motor, the second conveying shaft is arranged above the screen at the solid-phase material outlet of the buffer storage bin, and conveying blades are spirally arranged on the second conveying shaft.
Preferably, the outer side of the wet and hot hydrolysis tank is provided with a heat-insulating interlayer.
Preferably, a pump is arranged on a pipeline between a liquid-phase material outlet of the material receiving bin and a liquid-phase material inlet of the wet-heat hydrolysis tank, a pipeline between a liquid-phase material outlet of the spiral draining conveyor and a feed inlet of the heating homogeneity buffer tank, a pipeline between a liquid-phase material outlet of the extrusion dehydrator and a feed inlet of the heating homogeneity buffer tank, a pipeline between a discharge outlet of the heating homogeneity buffer tank and a feed inlet of the three-phase horizontal screw centrifuge, and a pipeline between a grease outlet of the three-phase horizontal screw centrifuge and the oil storage tank.
Preferably, the wastewater treatment system comprises a cyclone dust collector, a pipeline filter and a condenser which are sequentially connected through a pipeline, wherein an air outlet of the wet-hot hydrolysis tank, an air outlet of the buffer storage bin and an air outlet of the heating homogenization buffer storage tank are connected with an air inlet of the cyclone dust collector through pipelines; the outlet of the condenser is connected with the air inlets of the first filter and the second filter through an air outlet pipeline, a wastewater outlet is arranged on the air outlet pipeline, and the wastewater outlet is connected with a wastewater storage tank.
Preferably, the first filter is a vacuum filter, an air outlet of the vacuum filter is connected with a water tank through a pipeline, an air outlet is formed in the water tank, and a vacuum pump is arranged on the pipeline between the vacuum filter and the water tank; the second filter is a pressure relief filter.
The second aspect, the utility model also provides an utilize above-mentioned kitchen garbage hydrothermal hydrolysis pretreatment systems to carry out kitchen garbage hydrothermal hydrolysis pretreatment process, including following step:
1) conveying the kitchen waste into a receiving bin through a feed inlet by using a kitchen waste collecting vehicle, filtering large materials by the kitchen waste through a first filtering mechanism and then removing the large materials, filtering the filtered materials through a second filtering mechanism, conveying the filtered solid-phase materials to a solid-phase material outlet of the receiving bin through a first material conveying mechanism, and conveying the liquid-phase materials into a damp-heat hydrolysis tank;
2) introducing a heating medium into the wet-heat hydrolysis tank through a heating medium inlet and a heating medium outlet until the temperature of the wet-heat hydrolysis tank meets the wet-heat hydrolysis requirement, conveying the solid-phase material at the solid-phase material outlet of the material receiving bin into the wet-heat hydrolysis tank through a screw conveyor, mixing the solid-phase material with the liquid-phase material entering the wet-heat hydrolysis tank, and conveying the mixture to a material outlet of the wet-heat hydrolysis tank under the action of a stirring conveying shaft while stirring;
3) the material after the damp-heat hydrolysis enters a material inlet of a spiral draining conveyer through a material outlet of a damp-heat hydrolysis tank, after being filtered by a third filtering mechanism, the solid-phase material is conveyed to a cache bin through the spiral draining conveyer, and the liquid-phase material enters a heating homogenizing cache tank through a pipeline;
4) after the material entering the cache bin is filtered by the fourth filtering mechanism, the solid-phase material is conveyed to a solid-phase material outlet of the cache bin by the second material conveying mechanism and then conveyed into the spiral screening conveyor by the spiral conveyor, and the liquid-phase material enters the filtrate tank through the pipeline and enters the heating homogenizing cache tank together with the liquid-phase material of the spiral draining conveyor;
5) after the materials in the spiral screening conveyor are filtered by the fifth filtering mechanism, large materials are conveyed to the material receiving vehicle by the spiral conveyor and transported away, and small materials enter the extrusion dewatering machine;
6) after the material is extruded and dehydrated by the extruding and dehydrating machine, solid slag is discharged from a solid-phase material outlet, the solid slag, the large material obtained by filtering in the step 1) and the large material obtained by filtering in the step 5) are transported by a material receiving trolley together for landfill or incineration, and extrusion liquid enters a heating homogenizing buffer tank through a pipeline;
7) the material entering the heating homogenization buffer tank is heated by a heating medium in the heating coil and stirred by the stirring mechanism, and enters the three-phase horizontal spiral centrifugal machine through a pipeline after the temperature reaches the requirement of the three-phase horizontal spiral centrifugal machine;
8) the three-phase horizontal screw centrifuge is used for carrying out three-phase separation of water, grease and slag on the materials, the separated grease enters an oil storage tank, and the water and the slag are discharged and mixed for anaerobic treatment;
9) moist heat hydrolysis tank combustion gas, buffer memory storehouse combustion gas and heating homogeneity buffer memory jar combustion gas get into cyclone and remove dust, get into the condenser condensation after filtering through the duct filter afterwards, the waste water that the condensation produced gets into waste water storage jar, and the gas that does not congeal then gets into respectively in first filter and the second filter and filters the back and discharge again.
Preferably, in the step 2), the temperature of the wet-heat hydrolysis in the wet-heat hydrolysis tank is 120-.
Preferably, in the step 2), the heating medium of the wet-heat hydrolysis tank is saturated steam with the temperature of 164 ℃ and the pressure of 0.6 MPa.
Compared with the prior art, the utility model, following beneficial effect has:
1. the utility model discloses not using the breaker, having solved the problem with high costs that the frequent change of the flight that leads to of breaker quartering hammer piece and three-phase separating centrifuge that exists among the traditional broken preliminary treatment technology of selecting separately, compare with traditional broken pulping process of selecting separately, this process system total investment reduces more than 50%, and the running cost reduces 30% than traditional technology.
2. The utility model discloses a kitchen garbage is after damp and hot hydrolysis becomes the pulpiness thing, has successively experienced spiral waterlogging caused by excessive rainfall conveyer, buffer bin, spiral screening conveyer and extrusion dewaterer's multistage screening and extrusion, separates the organic matter of retrieving from debris to the at utmost, has reduced the waste of organic matter, and organic matter extraction rate has improved 2-3% than traditional technology, and the grease extraction rate has improved 1-2% than traditional technology.
3. The kitchen waste is pretreated by adopting a damp-heat hydrolysis mode, the kitchen waste is not crushed and sorted by a crusher, massive and granular organic matters are hydrolyzed into slurry with extremely fine granularity by utilizing high-temperature hydrolysis, and water, grease and organic residues are separated by a three-phase horizontal spiral centrifuge. Hard sundries such as dinner plates and wine cups which are broken off in the kitchen waste are sequentially screened from the kitchen waste step by step through primary screening of a material receiving bin, secondary screening of a spiral draining conveyor, tertiary screening of a buffer bin and quartic screening of a spiral screening conveyor, so that the content of the hard sundries in the three-phase separated materials is greatly reduced, and the burden is relieved for subsequent anaerobic treatment.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic view of the structure of the rotary shaft of the first filter mechanism.
Fig. 4 is a process flow diagram of the present invention.
In the figure, 1-a material receiving bin, 2-a wet and hot hydrolysis tank, 3-a buffer bin, 4-an extrusion dehydrator, 5-a heating and homogenizing buffer bin, 6-a three-phase horizontal screw centrifuge, 7-a screw conveyor, 8-a screw draining conveyor, 9-a filtrate tank, 10-an oil storage tank, 11-a pump, 12-an exhaust gas treatment system, 13-a cyclone dust collector, 14-a pipeline filter, 15-a condenser, 16-a first filter, 17-a second filter, 18-a waste water storage tank, 19-a water tank, 20-a vacuum pump, 21-a kitchen waste collecting vehicle, 22-a first conveying shaft, 23-a screw screening conveyor, 24-a material receiving vehicle, 25-a rotating shaft and 26-a wing shaft.
Detailed Description
Example 1
As shown in fig. 1-4, the present embodiment provides a kitchen waste wet and hot hydrolysis pretreatment system, which includes a receiving bin 1, a wet and hot hydrolysis tank 2, a buffer bin 3, an extrusion dehydrator 4, a heating homogenization buffer bin 5, a three-phase horizontal decanter centrifuge 6, and an exhaust gas treatment system 12. A plurality of rotating shafts driven by a motor are arranged at a feed inlet of the receiving bin 1 side by side, two rows of fin shafts are oppositely arranged on each rotating shaft along the length direction, adjacent two rows of fin shafts of two adjacent rotating shafts are arranged in a staggered mode, and the distance between the adjacent fin shafts of the two adjacent rotating shafts is 8 cm; a screen (4mm multiplied by 45mm) is arranged at the solid-phase material outlet of the receiving bin 1, a first conveying shaft 22 driven by a motor is arranged above the screen at the solid-phase material outlet of the receiving bin 1, and conveying blades are spirally arranged on the first conveying shaft 22; connect and be provided with screw conveyer 7 between the solid material export of feed bin 1 and the solid material entry of damp and hot hydrolysis tank 2, connect the liquid material export of feed bin 1 bottom to pass through the liquid material entry linkage of pipeline and damp and hot hydrolysis tank 2, be equipped with pump 11 on the pipeline.
The material exit level of hydrothermal hydrolysis jar 2 is provided with the stirring and carries the axle, and the stirring is carried the axle and is carried the axle by motor drive, and the epaxial spiral of stirring is carried and is provided with stirring vane, and the gas outlet of hydrothermal hydrolysis jar 2 passes through the pipeline and is connected with cyclone 13's air inlet, and hydrothermal hydrolysis jar 2 still is equipped with heating medium entry and heating medium export, is provided with spiral draining conveyer 8 between the material export of hydrothermal hydrolysis jar 2 and the feed inlet of buffer memory storehouse 3.
The feed inlet department of spiral draining conveyer 8 is provided with the screen cloth that the aperture is 5mm, and the position that 8 bottoms of spiral draining conveyer are relative with the feed inlet is equipped with filtrate groove 9, and the liquid phase material export of filtrate groove 9 bottom is connected with the feed inlet of heating homogeneity buffer tank 5 through the pipeline, is equipped with pump 11 on the pipeline. A solid-phase material outlet of the buffer bin 3 is provided with a screen with the aperture of 5mm, a second conveying shaft driven by a motor is arranged above the screen, the second conveying shaft is spirally provided with conveying blades, and a liquid-phase material outlet at the bottom of the buffer bin 3 is communicated with a filtrate tank 9 through a pipeline; an air outlet of the buffer bin 3 is connected with an air inlet of the cyclone dust collector 13 through a pipeline, and a spiral conveyor 7 and a spiral screening conveyor 23 are arranged between a solid-phase material outlet of the buffer bin 3 and a feed inlet of the extrusion dehydrator 4; the screw axis lower extreme of spiral screening conveyer 23 is provided with the screen cloth of aperture 4cm, and the feed inlet of spiral screening conveyer 23 is located the discharge gate below of screw conveyer 7 in 3 solid phase material exits in buffer bin, and the fritter material export of spiral screening conveyer 23 bottom is connected with the feed inlet of extrusion hydroextractor 4, and the below of bold material export still is equipped with screw conveyer 7.
The extrusion dehydrator 4 is provided with a solid-phase material outlet and a liquid-phase material outlet, the liquid-phase material outlet of the extrusion dehydrator 4 is connected with the feed inlet of the heating homogenization buffer tank 5 through a pipeline, and a pump 11 is arranged on the pipeline; a heating coil and a stirring mechanism are arranged in the heating homogeneity cache tank 5, the heating medium (such as steam, hot water and the like) flows in the heating coil to heat the material in the heating homogeneity cache tank 5, the stirring mechanism can adopt a conventional stirring device, such as a stirring shaft with stirring blades driven by a motor, to stir the material in the heating homogeneity cache tank 5, a discharge hole of the heating homogeneity cache tank 5 is connected with a feed inlet of a three-phase horizontal decanter centrifuge 6 through a pipeline, and a pump 11 is arranged on the pipeline; the air outlet of the heating homogenization buffer tank 5 is connected with the air inlet of the cyclone dust collector 13 through a pipeline; the three-phase horizontal screw centrifuge 6 is provided with a water outlet, an oil outlet and a slag outlet, the oil outlet is connected with an oil storage tank 10 through a pipeline, and a pump 11 is arranged on the pipeline.
The wastewater treatment system comprises a cyclone dust collector 13, a pipeline filter 14 and a condenser 15 which are sequentially connected through a pipeline, wherein an outlet of the condenser 15 is respectively connected with gas inlets of a first filter 16 and a second filter 17 through a gas outlet pipeline, a wastewater outlet is arranged on the gas outlet pipeline, the wastewater outlet is connected with a wastewater storage tank 18, the first filter 16 adopts a vacuum filter, a gas outlet of the vacuum filter is connected with a water tank 19 through a pipeline, a gas outlet is arranged on the water tank 19, and a vacuum pump 20 is arranged on the pipeline between the vacuum filter and the water tank 19; the second filter 17 is a pressure release filter.
The screw conveyor 7, the extrusion dehydrator 4, the three-phase horizontal screw centrifuge 6, the cyclone dust collector, the pipeline filter 14, the condenser 15, the vacuum filter, the pressure relief filter, the vacuum pump 20 and the pumps 11 on the pipelines in the embodiment are all commercially available, and the specific structures thereof are not described herein again.
The process for carrying out the wet and hot hydrolysis pretreatment on the kitchen waste by the wet and hot hydrolysis pretreatment system for the kitchen waste comprises the following steps:
1) conveying the kitchen waste into the material receiving bin 1 through a feeding hole by using a kitchen waste collecting cart 21, filtering large materials by the kitchen waste through staggered fin shafts at the feeding hole and then manually removing the large materials, and allowing small materials to pass through gaps among the fin shafts and fall onto a screen at a solid-phase material outlet; a small part of middle block materials remain on the wing shaft after the large block materials are removed, the motor is started to drive the rotating shaft to rotate, the wing shaft which is horizontally arranged is changed into a vertical arrangement, the middle block materials which are not removed fall onto a screen at the solid phase material outlet, the middle block materials and the small block materials are filtered through the screen at the solid phase material outlet, the solid-liquid separation is carried out preliminarily, the filtered solid phase materials are conveyed to the solid phase material outlet of the material receiving bin 1 through the first conveying shaft 22, and the liquid phase material pump 11 enters the wet-heat hydrolysis tank 2;
2) introducing 0.6MPa saturated steam at 164 ℃ into the wet-heat hydrolysis tank 2 through a heating medium inlet and a heating medium outlet until the temperature of the wet-heat hydrolysis tank 2 reaches 120-;
3) the slurry material after the wet and hot hydrolysis enters a feed inlet of a spiral draining conveyer 8 through a material outlet of a wet and hot hydrolysis tank 2, after being filtered by a screen at the feed inlet, the solid phase material is conveyed to a cache bin 3 through the spiral draining conveyer 8, and the liquid phase material is collected in a filtrate tank 9 and enters a heating homogenizing cache tank 5 through a pipeline pump 11;
4) after the material entering the cache bin 3 is filtered by a screen, the solid-phase material is conveyed to a solid-phase material outlet of the cache bin 3 through a second conveying shaft and then conveyed into a spiral screening conveyor 23 through a spiral conveyor 7, and the liquid-phase material enters a filtrate tank 9 through a pipeline and enters a heating homogenizing cache tank 5 together with the liquid-phase material of a spiral draining conveyor 8;
5) after the materials in the spiral screening conveyor 23 are filtered by the screen, the large materials are conveyed to the material receiving trolley 24 by the spiral conveyor 7 and are transported away, so that the large materials are prevented from entering the extrusion dehydrator 4 to damage the extrusion dehydrator 4, and the small materials enter the extrusion dehydrator 4;
6) after the material is extruded and dehydrated by the extruding and dehydrating machine 4, the water content of the material is reduced to be below 60 percent, solid slag is discharged from a solid-phase material outlet, the solid slag, the large material obtained by filtering in the step 1) and the large material obtained by filtering in the step 5) are transported by a material receiving vehicle together for landfill or incineration, and extrusion liquid is fed into the heating homogenizing buffer tank 5 through a pipeline pump 11;
7) the material entering the heating homogeneity cache tank 5 is heated by a heating medium in a heating coil and stirred by a stirring mechanism, and enters the three-phase horizontal spiral centrifugal machine 6 through a pipeline after the temperature reaches above 85 ℃, so that the temperature of the material entering the three-phase horizontal spiral centrifugal machine 6 is not lower than 80 ℃;
8) the three-phase horizontal decanter centrifuge 6 is used for carrying out three-phase separation of water, grease and slag on the materials, a grease pump 11 after separation enters an oil storage tank 10, and water and slag are discharged and mixed for anaerobic treatment;
9) the gas of wet and hot hydrolysis jar 2 exhaust gas, buffer memory storehouse 3 exhaust gas and the gas of heating homogeneity buffer memory jar 5 exhaust gas get into cyclone and remove dust, and then filter through pipe-line filter 14 and get into condenser 15 in further condensation, the waste water that the condensation produced gets into waste water storage jar 18, and noncondensable gas then gets into respectively and filters in vacuum filter and the pressure release filter, and wherein the gas of vacuum filter exhaust further gets into in the water tank 19 and further gets rid of the peculiar smell after discharging.
The utility model discloses utilize damp and hot hydrolysis to replace traditional breaker breakage, the cost is reduced on the one hand, has improved organic matter extraction rate on the one hand, still selects stereoplasm debris from the kitchen garbage multistage simultaneously, has alleviateed subsequent anaerobic treatment's burden greatly.
Example 2
On the basis of the embodiment 1, the outer side of the wet and hot hydrolysis tank 2 is provided with a heat insulation interlayer, so that heat exchange between the wet and hot hydrolysis tank 2 and the atmosphere is isolated, and the loss of heat is reduced.
Claims (7)
1. A wet-heat hydrolysis pretreatment system for kitchen waste is characterized in that,
comprises a receiving bin (1), a wet-hot hydrolysis tank (2), a buffer bin (3), an extrusion dehydrator (4), a heating homogenization buffer bin (5), a three-phase horizontal screw centrifuge (6) and a waste gas treatment system (12);
a first filtering mechanism is arranged at a feed inlet of the receiving bin (1), a second filtering mechanism is arranged at a solid-phase material outlet, a first material conveying mechanism is arranged at the second filtering mechanism, a spiral conveyor (7) is arranged between the solid-phase material outlet of the receiving bin (1) and the solid-phase material inlet of the hydrothermal hydrolysis tank (2), and a liquid-phase material outlet at the bottom of the receiving bin (1) is connected with the liquid-phase material inlet of the hydrothermal hydrolysis tank (2) through a pipeline;
a material outlet of the wet-heat hydrolysis tank (2) is horizontally provided with a stirring conveying shaft, the stirring conveying shaft is driven by a motor, stirring blades are spirally arranged on the stirring conveying shaft, an air outlet of the wet-heat hydrolysis tank (2) is connected with a waste gas treatment system (12) through a pipeline, the wet-heat hydrolysis tank (2) is also provided with a heating medium inlet and a heating medium outlet, and a spiral draining conveyor (8) is arranged between the material outlet of the wet-heat hydrolysis tank (2) and a feed inlet of the buffer bin (3);
a third filtering mechanism is arranged at the lower end of a spiral shaft of the spiral draining conveyor (8), a filtrate tank (9) is arranged at the position, opposite to the feeding hole, of the bottom of the spiral draining conveyor (8), and a liquid-phase material outlet at the bottom of the filtrate tank (9) is connected with the feeding hole of the heating homogenization buffer tank (5) through a pipeline;
a fourth filtering mechanism is arranged at a solid-phase material outlet of the buffer bin (3), a second material conveying mechanism is arranged at the fourth filtering mechanism, a liquid-phase material outlet at the bottom of the buffer bin (3) is communicated with a filtrate tank (9) of a spiral draining conveyor (8) through a pipeline, an air outlet of the buffer bin (3) is connected with a waste gas treatment system (12) through a pipeline, and a spiral conveyor (7) and a spiral screening conveyor (23) are arranged between the solid-phase material outlet of the buffer bin (3) and a feed inlet of an extrusion dehydrator (4);
a fifth filtering mechanism is arranged at the lower end of a spiral shaft of the spiral screening conveyor (23), a feed inlet of the spiral screening conveyor (23) is positioned below a discharge outlet of the spiral conveyor (7) at a solid-phase material outlet of the buffer bin (3), a small material outlet at the bottom of the spiral screening conveyor (23) is connected with a feed inlet of the extrusion dehydrator, and the spiral conveyor (7) is also arranged below a large material outlet;
the extrusion dehydrator (4) is provided with a solid-phase material outlet and a liquid-phase material outlet, and the liquid-phase material outlet of the extrusion dehydrator (4) is connected with the feed inlet of the heating homogenization buffer tank (5) through a pipeline;
a heating coil and a stirring mechanism are arranged in the heating homogeneity cache tank (5), a discharge hole of the heating homogeneity cache tank (5) is connected with a feed inlet of a three-phase horizontal screw centrifuge (6) through a pipeline, and an air outlet of the heating homogeneity cache tank (5) is connected with a waste gas treatment system (12) through a pipeline;
the three-phase horizontal screw centrifuge (6) is provided with a water outlet, an oil outlet and a slag outlet, and the oil outlet is connected with the oil storage tank (10) through a pipeline.
2. The pretreatment system for wet and hot hydrolysis of kitchen waste according to claim 1, wherein said first filtering mechanism comprises a plurality of rotating shafts driven by a motor, each rotating shaft is provided with two rows of fin shafts along the length direction, and two adjacent rows of fin shafts of two adjacent rotating shafts are arranged in a staggered manner; the second filtering mechanism, the third filtering mechanism, the fourth filtering mechanism and the fifth filtering mechanism are all screens; the screen mesh in the spiral draining conveyor (8) and the screen mesh in the buffer bin (3) are both 5mm in aperture, and the screen mesh in the spiral screening conveyor is 4cm in aperture.
3. The pretreatment system for wet and hot hydrolysis of kitchen waste according to claim 2, characterized in that said first material conveying mechanism is a first conveying shaft (22) driven by a motor, said first conveying shaft (22) is disposed above a screen at the solid material outlet of the receiving bin (1), and a conveying blade is spirally disposed on said first conveying shaft (22); the second material conveying mechanism is a second conveying shaft driven by a motor, the second conveying shaft is arranged above a screen at a solid-phase material outlet of the buffer bin (3), and conveying blades are spirally arranged on the second conveying shaft.
4. The pretreatment system for wet and hot hydrolysis of kitchen waste according to claim 1, characterized in that a heat-insulating interlayer is provided outside the wet and hot hydrolysis tank (2).
5. The pretreatment system for wet and hot hydrolysis of kitchen waste according to claim 1, wherein a pump (11) is disposed on a pipeline between the liquid phase material outlet of the receiving bin (1) and the liquid phase material inlet of the wet and hot hydrolysis tank (2), a pipeline between the liquid phase material outlet of the spiral draining conveyor (8) and the feed inlet of the heating homogenization buffer tank (5), a pipeline between the liquid phase material outlet of the extruding dehydrator (4) and the feed inlet of the heating homogenization buffer tank (5), a pipeline between the discharge outlet of the heating homogenization buffer tank (5) and the feed inlet of the three-phase horizontal screw centrifuge (6), and a pipeline between the grease outlet of the three-phase horizontal screw centrifuge (6) and the grease storage tank (10).
6. The pretreatment system for wet and hot hydrolysis of kitchen waste according to claim 1, wherein the waste gas treatment system comprises a cyclone (13), a pipeline filter (14) and a condenser (15) which are connected in sequence through a pipeline, and the air outlet of the wet and hot hydrolysis tank (2), the air outlet of the buffer bin (3) and the air outlet of the heating homogeneity buffer tank (5) are connected with the air inlet of the cyclone (13) through pipelines; the outlet of the condenser (15) is respectively connected with the air inlets of the first filter (16) and the second filter (17) through an air outlet pipeline, a wastewater outlet is arranged on the air outlet pipeline, and the wastewater outlet is connected with a wastewater storage tank (18).
7. The pretreatment system for wet and hot hydrolysis of kitchen waste according to claim 6, characterized in that the first filter (16) is a vacuum filter, the air outlet of the vacuum filter is connected with a water tank (19) through a pipeline, the water tank (19) is provided with an air outlet, and a vacuum pump (20) is arranged on the pipeline between the vacuum filter and the water tank (19); the second filter (17) is a pressure relief filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020509467.XU CN212168492U (en) | 2020-04-09 | 2020-04-09 | Wet-heat hydrolysis pretreatment system for kitchen waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020509467.XU CN212168492U (en) | 2020-04-09 | 2020-04-09 | Wet-heat hydrolysis pretreatment system for kitchen waste |
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| Publication Number | Publication Date |
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| CN212168492U true CN212168492U (en) | 2020-12-18 |
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| CN202020509467.XU Active CN212168492U (en) | 2020-04-09 | 2020-04-09 | Wet-heat hydrolysis pretreatment system for kitchen waste |
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2020
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