CN113714245A - Kitchen waste treatment device, waste treatment system and treatment method - Google Patents
Kitchen waste treatment device, waste treatment system and treatment method Download PDFInfo
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- CN113714245A CN113714245A CN202110874296.XA CN202110874296A CN113714245A CN 113714245 A CN113714245 A CN 113714245A CN 202110874296 A CN202110874296 A CN 202110874296A CN 113714245 A CN113714245 A CN 113714245A
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002699 waste material Substances 0.000 title claims description 11
- 238000003763 carbonization Methods 0.000 claims abstract description 136
- 238000006243 chemical reaction Methods 0.000 claims abstract description 131
- 239000007788 liquid Substances 0.000 claims abstract description 96
- 239000002002 slurry Substances 0.000 claims abstract description 84
- 238000000926 separation method Methods 0.000 claims abstract description 70
- 238000004537 pulping Methods 0.000 claims abstract description 60
- 238000000855 fermentation Methods 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000009413 insulation Methods 0.000 claims abstract description 19
- 239000011229 interlayer Substances 0.000 claims abstract description 13
- 239000010813 municipal solid waste Substances 0.000 claims description 49
- 239000000463 material Substances 0.000 claims description 38
- 230000004151 fermentation Effects 0.000 claims description 31
- 238000004227 thermal cracking Methods 0.000 claims description 29
- 238000000197 pyrolysis Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000002893 slag Substances 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 7
- 239000010893 paper waste Substances 0.000 claims description 3
- 239000013502 plastic waste Substances 0.000 claims description 3
- 239000010819 recyclable waste Substances 0.000 claims description 3
- 238000010009 beating Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kitchen waste treatment device, a kitchen waste treatment system and a kitchen waste treatment method, wherein the kitchen waste treatment device comprises a pulping device, a slurry outlet of the pulping device is connected with an inlet end of a second coil pipe, an outlet end of the second coil pipe is connected with an inlet end of a first coil pipe, an outlet end of the first coil pipe is connected with a feed inlet of a hydrothermal carbonization reaction device, a discharge port of the hydrothermal carbonization reaction device is connected with a feed inlet of a separation device, and a discharge port of the separation device is connected with a feed inlet of an anaerobic fermentation device; wherein, the first coil pipe is uniformly wound on the outer side of the reaction inner container and is arranged between the first heating sleeve and the first heat insulation wall; the second coil pipe is arranged in an interlayer between the second heat insulation wall and the separation tank and is uniformly wound on the outer side of the separation tank; according to the invention, heat exchange is carried out between the kitchen waste feed liquid and the hydrothermal carbonization feed liquid, and the heated slurry enters the reaction liner for hydrothermal carbonization, so that the heating efficiency is effectively improved; extra heat exchangers and heat exchange media are not needed, and heat loss in the heat exchange process is avoided.
Description
Technical Field
The invention belongs to the technical field of garbage treatment, and particularly relates to a kitchen garbage treatment device, a garbage treatment system and a kitchen garbage treatment method.
Background
In recent years, as the energy crisis is aggravated, the resource shortage is highlighted and the understanding on the environmental problems is gradually deepened, people gradually turn the passive treatment to the resource utilization of the municipal domestic waste; at present, according to the standard of 'household garbage classification mark', the household garbage categories are defined as follows: the four major types of garbage, kitchen garbage, other garbage and harmful garbage can be recovered; the kitchen waste contains a large amount of organic matters, has the characteristic of easy decay and deterioration, and is easy to carry microorganisms such as germs and the like.
At present, for example, in the Chinese patent application "a method for treating kitchen waste by hydrothermal carbonization coupled anaerobic digestion (application number: 201811082592.0)", the kitchen waste is subjected to hydrothermal carbonization treatment, and then harmless treatment is realized by using an anaerobic digestion technology; but the treatment process is slow, the energy consumption is high, and the treatment efficiency of the kitchen waste is low.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a kitchen waste treatment device, a kitchen waste treatment system and a kitchen waste treatment method, and aims to solve the technical problems that the existing kitchen waste treatment process is slow, the energy consumption is high, and the treatment efficiency of the kitchen waste is low.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a kitchen waste treatment device which comprises a hydrothermal carbonization reaction device, a separation device, a pulping device, an anaerobic fermentation device, a first coil pipe and a second coil pipe; the pulping device is provided with a pulp outlet, the pulp outlet is connected with the inlet end of the second coil pipe, the outlet end of the second coil pipe is connected with the inlet end of the first coil pipe, the outlet end of the first coil pipe is connected with the feed inlet of the hydrothermal carbonization reaction device, the discharge port of the hydrothermal carbonization reaction device is connected with the feed inlet of the separation device, and the discharge port of the separation device is connected with the feed inlet of the anaerobic fermentation device;
the hydrothermal carbonization reaction device comprises a reaction inner container, a first heating sleeve and a first heat insulation wall; the first heat insulation wall is sleeved at the outer side of the reaction liner, and the first heating sleeve is arranged between the reaction liner and the first heat insulation wall; the first coil pipe is wound on the outer side of the reaction inner container and is arranged between the first heating sleeve and the first heat insulation wall;
the separating device comprises a separating tank and a second heat-insulating wall, the second heat-insulating wall is sleeved on the outer side of the separating tank at intervals, an interlayer is formed between the second heat-insulating wall and the separating tank, and the second coil is arranged in the interlayer and wound on the outer side of the separating tank.
Further, the hydrothermal carbonization reaction device also comprises a slurry dispersing unit, and the slurry dispersing unit is arranged in the reaction liner;
the slurry dispersing unit comprises a plurality of helical blades, a rotating shaft and a first motor; the rotating shaft is vertically arranged at the center of the bottom of the reaction liner, the plurality of spiral blades are arranged on the rotating shaft, and the output end of the first motor is connected with the rotating shaft; the reaction inner container is provided with a slurry inlet which is positioned above the helical blade.
Furthermore, a plurality of through holes are uniformly formed in the spiral blade; the through holes are arranged on the spiral blade in an array mode, and the ratio of the distance between every two adjacent through holes to the equivalent diameter of each through hole is 0.8-2.
Further, the hydrothermal carbonization reaction device also comprises a spraying unit which is arranged inside the reaction liner; the spraying unit comprises a first spraying head and a liquid suction pump; the first spray header is arranged above the slurry dispersing unit, the liquid suction pump is arranged at the bottom of the reaction liner, and the output end of the liquid suction pump is connected with the inlet end of the first spray header through a pipeline.
Further, a second spray header is arranged at a slurry inlet of the reaction liner; the second spray header is arranged in the reaction inner container and is connected with the outlet end of the first coil pipe through the slurry inlet.
Further, the kitchen waste treatment device also comprises a water vapor generator; the top of the reaction inner container is provided with a water vapor inlet, and the water vapor inlet is connected with a steam outlet of the water vapor generator through a pipeline.
Further, the separation device also comprises a filter, and the filter is arranged inside the separation tank;
the pulping device comprises a pulping tank, a stirring blade and a second motor, wherein the top of the pulping tank is provided with a material inlet which is used for being communicated with a kitchen waste source; a slurry outlet is formed in the bottom of the pulping tank and is connected with the inlet end of the second coil pipe through a pipeline; the stirring blade rotates and sets up in the inside of beating jar, and the output of second motor is connected with the rotation center of stirring blade.
The invention also provides a kitchen waste treatment method, which utilizes the kitchen waste treatment device and specifically comprises the following steps:
pulping the kitchen waste to be treated by using a pulping device to obtain kitchen waste slurry;
conveying the kitchen waste slurry to a reaction inner container of a hydrothermal carbonization reaction device through a second coil pipe and a first coil pipe in sequence, and carrying out hydrothermal carbonization reaction to obtain hydrothermal carbonization feed liquid;
conveying the hydrothermal carbonization liquid to a separation tank of a separation device, and separating to obtain a hydrothermal carbonization liquid and hydrothermal carbonization residues;
conveying the hydrothermal carbonization liquid to an anaerobic fermentation device for anaerobic fermentation; and collecting the hydrothermal carbonization residue.
The invention also provides a garbage treatment system, which comprises a kitchen garbage treatment device and a thermal cracking device, wherein the kitchen garbage treatment device adopts the kitchen garbage treatment device;
the thermal cracking device comprises a pyrolysis furnace and a second heating sleeve, wherein the second heating sleeve is sleeved on the outer side of the pyrolysis furnace and used for supplying heat to the pyrolysis furnace; the discharge hole of the pyrolysis furnace is connected with the feed inlet of the separation device;
the separating tank is provided with a first slag discharge port, and the first slag discharge port of the separating tank and the discharge port of the anaerobic fermentation device are connected with the feed inlet of the pyrolysis furnace.
The invention also provides a garbage disposal method, which utilizes the garbage disposal system and specifically comprises the following steps:
pulping the kitchen waste to be treated by using a pulping device to obtain kitchen waste slurry;
conveying the kitchen waste slurry to a reaction inner container of a hydrothermal carbonization reaction device through a second coil pipe and a first coil pipe in sequence, and carrying out hydrothermal carbonization reaction to obtain hydrothermal carbonization feed liquid;
conveying the hydrothermal carbonization liquid to a separation tank of a separation device, and separating to obtain a hydrothermal carbonization liquid and hydrothermal carbonization residues;
conveying the hydrothermal carbonization liquid to an anaerobic fermentation device for anaerobic fermentation to obtain fermentation residues;
conveying the hydrothermal carbonization residue, the fermentation residue and other cleavable garbage into a pyrolysis furnace for thermal cracking to obtain a thermal cracking material; returning the thermal cracking material to the separating device for circulation;
wherein the other cleavable waste comprises one or more of paper waste, plastic waste and cloth waste among the recyclable waste.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a kitchen waste treatment device, a kitchen waste treatment system and a kitchen waste treatment method.A first coil pipe and a second coil pipe are arranged between a slurry outlet of a pulping device and a feed inlet of a hydrothermal carbonization reaction device, the first coil pipe is wound on the outer side of a reaction inner container, and the second coil pipe is wound on the outer side of a separation tank; the low-temperature slurry obtained by the kitchen waste pulping device flows through the second coil pipe in the interlayer of the separation device, and meanwhile, high-temperature hydrothermal carbonization feed liquid generated by hydrothermal carbonization is separated in a separation tank of the separation device, so that heat exchange is carried out between the low-temperature slurry and the high-temperature hydrothermal carbonization feed liquid, and the low-temperature kitchen waste slurry obtained by the pulping device is preheated; the slurry flows to the first coil pipe, the heating efficiency of the first heating sleeve on the slurry in the first coil pipe can be improved, the heated slurry enters the reaction inner container through the first coil pipe for hydrothermal carbonization, the heating efficiency is effectively improved, and the reaction efficiency of hydrothermal carbonization can be improved; the high-temperature hydrothermal carbonization material liquid is separated in the separation tank, is conveyed to the fermentation tank after being subjected to heat exchange and temperature reduction, and can be fermented by using the waste heat after the high-temperature hydrothermal carbonization material liquid is cooled without additionally heating the fermentation tank, so that the energy is saved; heat in the device is exchanged between the pulping liquid formed by pulping before hydrothermal carbonization reaction and the hydrothermal carbonization liquid after hydrothermal carbonization reaction, and an additional heat exchanger and a heat exchange medium are not needed, so that heat loss in the heat exchange process is avoided, energy consumption is further reduced, and efficient treatment of the kitchen waste is realized.
Further, by arranging the slurry dispersing unit in the hydrothermal carbonization reaction device, the kitchen waste slurry enters from the slurry inlet of the reaction liner and falls freely under the action of gravity, and the falling process impacts the kitchen waste slurry due to the rotation of the helical blades, so that the kitchen waste slurry forms dispersed liquid drops, and the efficiency of hydrothermal carbonization reaction is improved.
Furthermore, the spiral blades are provided with the through holes, so that a part of slurry can pass through the through holes, and the rest of slurry is uniformly distributed on the spiral blades, thereby effectively improving the dispersibility of the slurry in the reaction liner and improving the efficiency of the hydrothermal carbonization reaction; simultaneously, be array arrangement on helical blade with a plurality of through holes, the distance between the adjacent through hole is 0.8 ~ 2 setting with the ratio of the equivalent diameter of through hole, can control the proportion of the kitchen garbage thick liquids that distribute on helical blade and the thick liquids that pass the through hole better, can promote thick liquids dispersion efficiency, promotes hydrothermal carbonization efficiency.
Furthermore, a spraying unit is arranged in the hydrothermal carbonization reaction device, and slurry gathered at the bottom of the reaction liner can be circularly dispersed through a liquid suction pump and a first spraying head by the spraying unit, so that the hydrothermal carbonization efficiency is improved.
Furthermore, through setting up the second shower head, guaranteed that the kitchen garbage thick liquids that get into the reaction inner bag at first sprays the dispersion through the second shower head, improved the dispersion efficiency of thick liquids in the reaction inner bag.
Furthermore, the water vapor generator is connected with the water vapor inlet on the reaction liner, and the water vapor generator can input water vapor into the reaction liner, so that the water vapor content in the hydrothermal carbonization reaction process is controlled, and the stable operation of the treatment device is improved.
Further, the pyrolysis device carries out thermal cracking on residues generated by fermentation and hydrothermal carbon generated by separation and carbonization, the fermentation residues are further utilized, the hydrothermal carbon can be further carbonized, meanwhile, the thermal cracking device can be utilized to treat paper garbage, plastic garbage and cloth garbage in the recyclable garbage, and the thermal cracking liquid can be subjected to anaerobic fermentation treatment, so that a harmless and recycling treatment system for the paper garbage, the plastic garbage and the cloth garbage in the kitchen garbage and the recyclable garbage is formed.
According to the kitchen waste treatment device, the kitchen waste treatment system and the kitchen waste treatment method, waste heat generated after the high-temperature hydrothermal carbonization material liquid is properly cooled can be utilized for fermentation without additionally heating the fermentation tank, energy is saved, heat is exchanged between the pulping material liquid formed by pulping before hydrothermal carbonization reaction and the hydrothermal carbonization material liquid after hydrothermal carbonization reaction, an additional heat exchanger and a heat exchange medium are not needed, heat loss in the heat exchange process is avoided, and energy consumption is further reduced.
Drawings
FIG. 1 is a schematic structural diagram of a kitchen waste treatment device according to the present invention;
FIG. 2 is a schematic sectional view A-A of a hydrothermal carbonization reaction device in the kitchen waste treatment device according to the present invention;
FIG. 3 is a schematic sectional view B-B of a separating device in the kitchen waste treatment device according to the present invention;
FIG. 4 is a schematic structural view of a helical blade in the kitchen waste treatment device according to the present invention;
FIG. 5 is a schematic structural diagram of a garbage disposal system according to the present invention
Wherein, 1, a hydrothermal carbonization reaction device, 2 a separation device, 3 a pulping device, 4 an anaerobic fermentation device, 5 a first coil, 6 a second coil and 7 a thermal cracking device; a 110 reaction inner container, a 111 steam inlet, a 112 slurry inlet, a 113 first feed liquid outlet and a 114 second spray header; 120 a first heating jacket; 130 a first insulating wall; 140 a slurry dispersing unit, 141 a helical blade, 142 a rotating shaft, 143 a first motor, 144 a through hole; 150 spray units, 151 first spray headers, 152 liquid suction pumps; 210 a knockout drum, 211 a feed liquid inlet, 212 a second feed liquid outlet; 220 a filter; 230 a second insulating wall; 240 interlayer; 250 a first slag discharge port; 301 a pulping tank, 302 a stirring blade, 303 a second motor, 304 a pulp outlet and 305 a material inlet; a 401 fermenter, 402 slurry inlet, 403 gas outlet, 404 third insulating wall, 405 second slag discharge; 701 pyrolysis furnace, 702 second heating jacket, 703 material feed inlet, 704 third feed liquid outlet.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-4, this embodiment 1 provides a kitchen waste treatment device, which includes a hydrothermal carbonization reaction device 1, a separation device 2, a pulping device 3, an anaerobic fermentation device 4, a first coil pipe 5, a second coil pipe 6, and a steam generator; the discharge port of the pulping device 3 is connected with the inlet end of the second coil pipe 6, the outlet end of the second coil pipe 6 is connected with the inlet end of the first coil pipe 5, the outlet end of the first coil pipe 5 is connected with the feed port of the hydrothermal carbonization reaction device 1, the discharge port of the hydrothermal carbonization reaction device 1 is connected with the feed port of the separation device 2, and the discharge port of the separation device 2 is connected with the feed port of the anaerobic fermentation device 4.
The hydrothermal carbonization reaction device 1 comprises a reaction liner 110, a first heating jacket 120, a first heat insulation wall 130, a slurry dispersing unit 140 and a spraying unit 150; the first heating jacket 120 is sleeved outside the reaction liner 110, and the first heat insulation wall 130 is arranged outside the first heating jacket 120; the first coil 5 is wound around the outer side of the reaction liner 110 and disposed between the first heating jacket 120 and the first heat insulating wall 130, that is, the first coil 5 is disposed outside the first heating jacket 120 and inside the first heat insulating wall 130; preferably, the first coil 5 is uniformly wound around the outer side of the reaction liner 110.
The reaction liner 110 is provided with a water vapor inlet 111, a slurry inlet 112 and a first feed liquid outlet 113, the water vapor inlet 111 is positioned at the top of the reaction liner 110, one side of the water vapor inlet 111 is communicated with the inside of the reaction liner 110, and the other side of the water vapor inlet is connected with a steam outlet of the water vapor generator through a pipeline, so that the water vapor generated by the water vapor generator is introduced into the reaction liner 110 for hydrothermal carbonization reaction, and the water vapor content in the hydrothermal carbonization reaction process is effectively controlled; the first material liquid outlet 113 is connected with the separation device 2 through a pipeline and is used for introducing the hydrothermal carbonization material liquid after the hydrothermal carbonization reaction into the separation device 2 for separation.
The slurry inlet 112 is arranged at the top of the side wall of the reaction liner 110, one side of the slurry inlet 112 is connected with the outlet end of the first coil pipe 5, and the other side is communicated with the interior of the reaction liner 110; wherein, the slurry inlet 112 on the reaction liner 110 is a feed inlet of the hydrothermal carbonization reaction device 1; a second spray header 114 is arranged at the slurry inlet 112, and the second spray header 114 is arranged above the top of the reaction liner; the kitchen waste slurry output by the pulping device 3 is conveyed to the second spray head 114 through the second coil 6 and the first coil 5, and is uniformly dispersed into the reaction liner 110 by the second spray head 114 to perform hydrothermal carbonization reaction.
The slurry dispersing unit 140 is arranged in the reaction liner, the slurry dispersing unit 140 comprises a plurality of helical blades 141, a rotating shaft 142 and a first motor 143, and the rotating shaft 142 is vertically arranged at the center of the bottom of the reaction liner 110; a plurality of screw blades 141 are installed on the rotating shaft 142, and the slurry inlet 112 is positioned above the screw blades 141; the first motor 143 is installed at the bottom outside of the reaction inner container 110, an output shaft of the first motor 143 vertically extends into the reaction inner container 110, the output shaft of the first motor 143 is fixedly connected with the rotating shaft 142, the rotating shaft 142 is powered by the first motor 143, the rotating shaft 142 is driven to rotate around the axis of the rotating shaft 142, and then the helical blade 141 on the rotating shaft 142 is driven to rotate.
In this embodiment 1, the helical blade 141 is uniformly provided with a plurality of through holes 144; preferably, the center line of the through hole 144 is parallel to the axis of the rotating shaft 142; the through holes 144 are arranged on the helical blade 141 in an array, and the ratio of the distance between adjacent through holes 144 to the equivalent diameter of the through holes 144 is 0.8-2; preferably, the equivalent diameter of the through-holes 144 is 3 to 15 mm; according to the arrangement of the position and the size of the through hole in the embodiment 1, the proportion of the kitchen waste slurry distributed on the helical blade 141 and the slurry passing through the through hole can be better controlled, the slurry dispersion efficiency can be improved, and the hydrothermal carbonization efficiency can be improved.
The kitchen waste slurry beaten by the beating device 3 is conveyed to the reaction liner 110 of the hydrothermal carbonization device 1, enters from the slurry inlet 112 of the reaction liner 110, and in the process of falling by gravity, the first motor 143 drives the helical blade 141 to rotate and impact the kitchen waste slurry, so that the kitchen waste slurry forms dispersed liquid drops, and the hydrothermal carbonization reaction efficiency is improved; by arranging the through holes 144 on the helical blade 141, a part of the slurry can pass through the through holes 144, and the rest of the slurry is distributed and attached to the helical blade 141, so that the dispersibility of the slurry is further improved, and the hydrothermal carbonization reaction efficiency is improved.
The spraying unit 150 is disposed inside the reaction liner 110, and the spraying unit 150 includes a first spraying head 151 and a liquid suction pump 152; the first shower head 151 is arranged above the helical blade 141 and above the second shower head 114; the liquid suction pump 152 is arranged at the bottom of the reaction liner 110, and the output end of the liquid suction pump 152 is connected with the inlet end of the first spray header 151 through a pipeline; through setting up spray unit 150, utilize the pipeline to be connected imbibition pump 152 and first shower head 151, will assemble the thick liquid in reaction inner bag bottom through imbibition pump 152 and first shower head 151, the circulation dispersion has effectively promoted hydrothermal carbonization efficiency.
The separation device 2 comprises a separation tank 210, a filter 220 and a second heat insulation wall 230, the second heat insulation wall 230 is arranged on the outer side of the separation tank 210 in a spaced and sleeved mode, an interlayer 240 is formed between the second heat insulation wall 230 and the separation tank 210, and the second coil 6 is arranged in the interlayer 240 and is wound on the outer side of the separation tank 210; preferably, the second coil 6 is uniformly wound on the outer side of the separation tank 210; the filter 220 is disposed inside the separation tank 210, and is configured to perform solid-liquid separation on the hydrothermal carbonization liquid to obtain a hydrothermal carbonization liquid and a hydrothermal carbonization residue; the separating tank 210 is provided with a feed liquid inlet 211 and a second feed liquid outlet 212, the feed liquid inlet 211 is used for being connected with the first feed liquid outlet 113 of the reaction liner 110 through a pipeline, and the second feed liquid outlet 212 is used for being connected with the feed inlet of the anaerobic fermentation device 4 through a pipeline.
The pulping device 3 comprises a pulping tank 301, a stirring blade 302 and a second motor 303, wherein the bottom of the pulping tank 301 is provided with a pulp outlet 304, and the top of the pulping tank 301 is provided with a material inlet 305; a material inlet 305 of the pulping tank 301 is used for being communicated with a kitchen waste source, and a pulp outlet 304 of the pulping tank 301 is connected with the inlet end of the second coil 6 through a pipeline; preferably, a hydraulic pump is arranged on a connecting pipeline between the pulping tank 301 and the second coil 6, and the pulping kitchen waste slurry is conveyed to the second coil 6 by the hydraulic pump, and then enters the hydrothermal carbonization reaction device 1 after passing through the second coil 6 and the first coil 5; the stirring blade is rotatably arranged inside the pulping tank 301, the second motor 303 is arranged at the center of the bottom of the pulping tank 301, and the output end of the second motor 303 vertically extends into the pulping tank 301 and is connected with the rotating center of the stirring blade 302; the second motor 303 is used for providing power for the pulping leaves to drive the pulping leaves to rotate, so that the kitchen waste added into the pulping tank 301 is pulped, and the kitchen waste pulp is obtained.
The anaerobic fermentation device 4 comprises a fermentation tank 401 and a third heat insulation wall 404; the fermentation tank 401 is provided with a slurry inlet 402, a gas outlet 403 and a second slag discharge port 405, the slurry inlet 402 is arranged at the top of the fermentation tank 401, and the slurry inlet 402 is communicated with the second feed liquid outlet 212 of the separation device 2 through a pipeline; the gas outlet 403 is arranged at the top end of the side wall of the fermentation tank 401; the second slag discharge hole 405 is arranged at the bottom of the fermentation tank 401, and the second slag discharge hole 405 is connected with a fermentation residue collecting device through a pipeline and is used for collecting and treating fermented residues; the third insulating wall 404 is sleeved outside the fermentation tank 401 and used for insulating heat of the fermentation tank 401.
Preferably, in the embodiment 1, the first heating jacket 120 is an electric jacket.
Application method and working principle
The kitchen waste treatment device in embodiment 1 comprises a hydrothermal carbonization reaction device, a separation device, a pulping device, an anaerobic fermentation device, a first coil pipe and a second coil pipe; in this example 1, the structures of the hydrothermal carbonization reaction device and the separation device were modified; specifically, a first coil pipe is arranged between the outer side of a first heating sleeve of the hydrothermal carbonization reaction device and the inner side of a first heat insulation wall, so that the first heating sleeve can heat the first coil pipe and materials in a reaction liner simultaneously; the separation device is characterized in that an interlayer located between the second heat insulation wall and the separation tank is formed by arranging a distance between the second heat insulation wall and the separation tank of the separation device, the second coil is arranged in the interlayer, and the connection relation is improved in a combined mode, so that a slurry outlet of the pulping device is communicated with an inlet end of the second coil through a hydraulic pump, an outlet end of the second coil is communicated with an inlet end of the first coil, an outlet end of the first coil is communicated with a slurry inlet of the reaction liner, and a first feed liquid outlet of the reaction liner is communicated with a feed liquid inlet of the separation tank.
Based on the structure and the connection relation, the low-temperature kitchen waste slurry obtained by the kitchen waste pulping device flows through the second coil pipe in the interlayer of the separation device, and meanwhile, high-temperature hydrothermal carbonization feed liquid generated by hydrothermal carbonization is separated in a separation tank of the separation device; at this moment, microthermal kitchen garbage thick liquids just can carry out the heat exchange with the hydrothermal carbonization feed liquid of high temperature, realize preheating the microthermal kitchen garbage thick liquids that the making beating device obtained, then circulate to first coil pipe, can promote the heating efficiency of first heating jacket to the kitchen garbage thick liquids in the first coil pipe, the kitchen garbage thick liquids get into the reaction inner bag behind the first coil pipe and carry out hydrothermal carbonization reaction, further promoted heating efficiency, and then can improve hydrothermal carbonization's reaction efficiency.
The high-temperature hydrothermal carbonization material liquid is separated in the separation tank of the separation device and is conveyed to the fermentation tank after being properly cooled, so that the waste heat of the high-temperature hydrothermal carbonization material liquid after being properly cooled can be utilized for fermentation without additionally heating the fermentation tank, and the energy is saved; meanwhile, heat is exchanged between the kitchen waste slurry formed by beating before the hydrothermal carbonization reaction and the hydrothermal carbonization material liquid after the hydrothermal carbonization reaction, and an additional heat exchanger and a heat exchange medium are not needed, so that heat loss in the heat exchange process is avoided, and energy consumption is further reduced.
This embodiment 1 further provides a kitchen waste treatment method, which specifically includes the following steps:
step 1, inputting kitchen waste and water from a material inlet of a pulping device, and pulping to obtain kitchen waste slurry;
2, conveying the kitchen waste slurry obtained in the step 1 from a slurry outlet of a pulping device to a reaction inner container of a hydrothermal carbonization reaction device through a second coil pipe and a first coil pipe in sequence by a hydraulic pump, and performing hydrothermal carbonization reaction to obtain hydrothermal carbonization feed liquid;
and 4, conveying the hydrothermal carbonization liquid obtained in the step 3 to a fermentation tank of an anaerobic fermentation device for anaerobic fermentation, and collecting the hydrothermal carbonization residue obtained in the step 3.
Example 2
As shown in fig. 5, this embodiment 2 provides a waste disposal system, which includes a kitchen waste disposal device and a thermal cracking device 7, wherein the kitchen waste disposal device has a structure and a principle substantially the same as those of the kitchen waste disposal device in embodiment 1, and the difference is that:
the separation tank 210 is also provided with a first slag discharge port 250, and the first slag discharge port 250 is communicated with a feed inlet of the thermal cracking device 7; the second slag discharge port 405 of the fermentation tank 401 is communicated with the feed port of the thermal cracking device 7.
In this embodiment 2, the thermal cracking apparatus 7 includes a pyrolysis furnace 701 and a second heating jacket 702, the second heating jacket 702 is sleeved outside the pyrolysis furnace 701 and is used for supplying heat to the pyrolysis furnace 701; the pyrolysis furnace 701 is provided with a material feeding hole 703 and a third material liquid outlet 704, and the material feeding hole 703 is arranged at the top of the pyrolysis furnace 701; the first slag discharge port 250 is connected with the material feed port 703, and the second slag discharge port 405 of the fermentation tank 401 is connected with the material feed port 703; a third feed liquid outlet 704 is provided at the bottom of the pyrolysis furnace 701, and the third feed liquid outlet 704 is connected to the feed liquid inlet 211 of the separation tank 210 through a pipe.
Preferably, a first conveyor belt is arranged between the first slag discharge opening 250 of the separating tank 210 and the material feed opening 703, one end of the first conveyor belt is connected with the first slag discharge opening 250 of the separating tank 210, and the other end is connected with the material feed opening 703.
Preferably, a second conveyor belt is arranged between the second slag discharge hole 405 and the material feed hole 703 of the fermentation tank 401, one end of the first conveyor belt is connected with the second slag discharge hole 405 of the fermentation tank 401, and the other end is connected with the material feed hole 703.
Preferably, in this embodiment 2, the second heating jacket 702 is an electric jacket.
The use method and the working principle are as follows:
in the garbage disposal system of this embodiment 2, when in use, the residue generated by fermentation and the hydrothermal carbonization residue generated by separation and carbonization are thermally cracked by the thermal cracking device, and the fermentation residue is further utilized; and the hydrothermal carbonization residue can be further carbonized, the thermal cracking device can be used for treating paper garbage, plastic garbage and cloth garbage in the recyclable garbage, and the thermal cracking liquid can be subjected to anaerobic fermentation treatment, so that a harmless and recycling treatment system for the paper garbage, the plastic garbage and the cloth garbage in the kitchen garbage and the recyclable garbage is formed.
This embodiment 2 further provides a garbage disposal method, which specifically includes the following steps:
s1, inputting kitchen waste and water from a material inlet of a pulping device, and pulping to obtain kitchen waste slurry;
s2, conveying the kitchen waste slurry obtained in the S1 from a slurry outlet of the pulping device to a reaction inner container of a hydrothermal carbonization reaction device through a hydraulic pump and a second coil pipe and a first coil pipe in sequence, and performing hydrothermal carbonization reaction to obtain hydrothermal carbonization feed liquid;
s3, conveying the hydrothermal carbonization liquid obtained in the step S2 to a separation tank, and performing solid-liquid separation through a filter to obtain a hydrothermal carbonization liquid and hydrothermal carbonization residues;
and S4, conveying the hydrothermal carbonization liquid obtained in the step S3 to a fermentation tank of an anaerobic fermentation device for anaerobic fermentation, and conveying the hydrothermal carbonization residue obtained in the step 3 to a pyrolysis furnace of a thermal cracking device through a conveying belt.
Step a, performing thermal cracking on at least one of paper garbage, plastic garbage and cloth garbage in the recyclable garbage in a pyrolysis furnace of a thermal cracking device to obtain a thermal cracking material.
And b, conveying the thermal cracking material obtained in the step a to a separation tank for circulation.
In this embodiment 2, the steps S1-S4 are performed sequentially, and the step a and the step b are performed sequentially; the steps S1-S4 are not in sequence with the steps a and b.
In this embodiment 2, the hydrothermal carbonization residue obtained in step S3 is conveyed to a pyrolysis furnace of a thermal cracking device through a conveyor belt, and is mixed with at least one of paper waste, plastic waste and cloth waste in the recyclable waste to be thermally cracked, so as to form a cyclic process; and (c) conveying the thermal cracking material obtained in the step (a) to a separation tank, and mixing the thermal cracking material with the hydrothermal carbonized material liquid obtained in the step (S2) to form a circulating process.
According to the kitchen waste treatment device, the kitchen waste treatment system and the kitchen waste treatment method, the kitchen waste treatment device is utilized, so that low-temperature slurry obtained by the kitchen waste pulping device flows through the second coil pipe in the interlayer of the separation device, meanwhile, high-temperature hydrothermal carbonization feed liquid generated by hydrothermal carbonization is separated in the separation tank of the separation device, heat exchange can be carried out, the low-temperature kitchen waste slurry obtained by the pulping device is preheated and then flows to the first coil pipe, and the heating efficiency of the first heating sleeve on the slurry in the first coil pipe can be improved; the thick liquids get into reaction inner bag behind through first coil pipe and carry out hydrothermal carbonization, further promoted heating efficiency, and then can improve hydrothermal carbonization's reaction efficiency, and high temperature hydrothermal carbonization feed liquid separates in separator's separator and carry to the fermentation cylinder after properly cooling down, need not additionally to ferment the heating of fermentation cylinder just can utilize the waste heat after the high temperature hydrothermal carbonization feed liquid properly cools down to ferment again, the energy has been practiced thrift, and the setting of above-mentioned structure and relation of connection, make the heat only heat exchange between the beating feed liquid that the beating formed before hydrothermal carbonization reaction and the hydrothermal carbonization feed liquid after hydrothermal carbonization reaction, do not need extra heat exchanger and heat transfer medium, the calorific loss of heat transfer in-process has been avoided, further reduced energy consumption.
The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.
Claims (10)
1. A kitchen waste treatment device is characterized by comprising a hydrothermal carbonization reaction device (1), a separation device (2), a pulping device (3), an anaerobic fermentation device (4), a first coil pipe (5) and a second coil pipe (6); the pulping device (3) is provided with a pulp outlet, the pulp outlet is connected with the inlet end of the second coil pipe (6), the outlet end of the second coil pipe (6) is connected with the inlet end of the first coil pipe (5), the outlet end of the first coil pipe (5) is connected with the feed inlet of the hydrothermal carbonization reaction device (1), the discharge outlet of the hydrothermal carbonization reaction device (1) is connected with the feed inlet of the separation device (2), and the discharge outlet of the separation device (2) is connected with the feed inlet of the anaerobic fermentation device (4);
wherein, the hydrothermal carbonization reaction device (1) comprises a reaction inner container (110), a first heating jacket (120) and a first heat insulation wall (130); the first heat insulation wall (130) is sleeved on the outer side of the reaction inner container (110), and the first heating sleeve (120) is arranged between the reaction inner container (110) and the first heat insulation wall (130); the first coil pipe (5) is wound on the outer side of the reaction inner container (110) and is arranged between the first heating sleeve (120) and the first heat insulation wall (130);
the separating device (2) comprises a separating tank (210) and a second heat-insulating wall (230), the second heat-insulating wall (230) is arranged on the outer side of the separating tank (210) in a spaced mode, an interlayer (240) is formed between the second heat-insulating wall (230) and the separating tank (210), and the second coil pipe (6) is arranged in the interlayer (240) and wound on the outer side of the separating tank (210).
2. The kitchen waste treatment device according to claim 1, characterized in that the hydrothermal carbonization reaction device (1) further comprises a slurry dispersion unit (140), the slurry dispersion unit (140) is disposed in the reaction liner (110);
the slurry dispersing unit (140) comprises a plurality of helical blades (141), a rotating shaft (142) and a first motor (143); the rotating shaft (142) is vertically arranged at the center of the bottom of the reaction inner container (110), the plurality of helical blades (141) are arranged on the rotating shaft, and the output end of the first motor (143) is connected with the rotating shaft (142); the reaction inner container (110) is provided with a slurry inlet (112), and the slurry inlet (112) is positioned above the helical blade (141).
3. The kitchen waste treatment device according to claim 2, characterized in that the helical blade (141) is uniformly provided with a plurality of through holes (144); the through holes (144) are arranged on the helical blade (141) in an array, and the ratio of the distance between adjacent through holes to the equivalent diameter of the through holes (144) is 0.8-2.
4. The kitchen waste treatment device according to claim 2, characterized in that the hydrothermal carbonization reaction device (1) further comprises a spraying unit (150), and the spraying unit (150) is arranged inside the reaction liner (110); the spraying unit (150) comprises a first spraying head (151) and a liquid suction pump (152); the first spray header (151) is arranged above the slurry dispersing unit (140), the liquid suction pump (152) is arranged at the bottom of the reaction liner (110), and the output end of the liquid suction pump (152) is connected with the inlet end of the first spray header (151) through a pipeline.
5. The kitchen waste treatment device according to claim 2, characterized in that a second spray header (114) is arranged at the slurry inlet (112) of the reaction liner (110); the second spray header (114) is arranged inside the reaction inner container (110) and is connected with the outlet end of the first coil pipe (5) through a slurry inlet (112).
6. The kitchen waste treatment device according to claim 1, characterized in that the kitchen waste treatment device further comprises a water vapor generator; the top of the reaction inner container (110) is provided with a water vapor inlet (111), and the water vapor inlet (111) is connected with a steam outlet of the water vapor generator through a pipeline.
7. The kitchen waste treatment device according to claim 1, characterized in that the separation device (2) further comprises a filter (220), the filter (220) is arranged inside the separation tank (210);
the pulping device (3) comprises a pulping tank (301), a stirring blade (302) and a second motor (303), wherein the top of the pulping tank (301) is provided with a material inlet (305), and the material inlet (305) is used for being communicated with a kitchen waste source; a slurry outlet (304) is formed in the bottom of the pulping tank (301), and the slurry outlet (304) is connected with the inlet end of the second coil pipe (6) through a pipeline; the stirring blade (302) is rotatably arranged in the pulping tank (301), and the output end of the second motor (303) is connected with the rotating center of the stirring blade (302).
8. A kitchen waste treatment method, characterized in that the kitchen waste treatment method utilizes the kitchen waste treatment device of any one of claims 1-7, and specifically comprises the following steps:
pulping the kitchen waste to be treated by using a pulping device to obtain kitchen waste slurry;
conveying the kitchen waste slurry to a reaction inner container of a hydrothermal carbonization reaction device through a second coil pipe and a first coil pipe in sequence, and carrying out hydrothermal carbonization reaction to obtain hydrothermal carbonization feed liquid;
conveying the hydrothermal carbonization liquid to a separation tank of a separation device, and separating to obtain a hydrothermal carbonization liquid and hydrothermal carbonization residues;
conveying the hydrothermal carbonization liquid to an anaerobic fermentation device for anaerobic fermentation; and collecting the hydrothermal carbonization residue.
9. A waste disposal system comprising a kitchen waste disposal apparatus and a thermal cracking apparatus (7), wherein the kitchen waste disposal apparatus is the kitchen waste disposal apparatus according to any one of claims 1 to 7;
the thermal cracking device (7) comprises a pyrolysis furnace (701) and a second heating sleeve (702), wherein the second heating sleeve (702) is sleeved on the outer side of the pyrolysis furnace (701) and used for supplying heat to the pyrolysis furnace (701); the discharge hole of the pyrolysis furnace (701) is connected with the feed inlet of the separation device (2);
the separating tank (210) is provided with a first slag discharge port (250), and the first slag discharge port (250) of the separating tank (210) and the discharge port of the anaerobic fermentation device (4) are both connected with the feed port of the pyrolysis furnace (701).
10. A method for waste disposal, characterized in that it uses a waste disposal system according to claim 9, comprising in particular the following steps:
pulping the kitchen waste to be treated by using a pulping device to obtain kitchen waste slurry;
conveying the kitchen waste slurry to a reaction inner container of a hydrothermal carbonization reaction device through a second coil pipe and a first coil pipe in sequence, and carrying out hydrothermal carbonization reaction to obtain hydrothermal carbonization feed liquid;
conveying the hydrothermal carbonization liquid to a separation tank of a separation device, and separating to obtain a hydrothermal carbonization liquid and hydrothermal carbonization residues;
conveying the hydrothermal carbonization liquid to an anaerobic fermentation device for anaerobic fermentation to obtain fermentation residues;
conveying the hydrothermal carbonization residue, the fermentation residue and other cleavable garbage into a pyrolysis furnace for thermal cracking to obtain a thermal cracking material; returning the thermal cracking material to the separating device for circulation;
wherein the other cleavable waste comprises one or more of paper waste, plastic waste and cloth waste among the recyclable waste.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110874296.XA CN113714245A (en) | 2021-07-30 | 2021-07-30 | Kitchen waste treatment device, waste treatment system and treatment method |
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| CN202110874296.XA CN113714245A (en) | 2021-07-30 | 2021-07-30 | Kitchen waste treatment device, waste treatment system and treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115921490A (en) * | 2022-12-28 | 2023-04-07 | 广东广业投资集团有限公司 | Hydraulic impurity removal pulping device and kitchen waste treatment system and method |
| CN116833204A (en) * | 2023-07-07 | 2023-10-03 | 广东盛力生态环境科技有限公司 | Kitchen waste treatment device beneficial to deoiling and desalting |
-
2021
- 2021-07-30 CN CN202110874296.XA patent/CN113714245A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115921490A (en) * | 2022-12-28 | 2023-04-07 | 广东广业投资集团有限公司 | Hydraulic impurity removal pulping device and kitchen waste treatment system and method |
| CN115921490B (en) * | 2022-12-28 | 2024-03-12 | 广东广业投资集团有限公司 | Hydraulic impurity removal pulping device and kitchen waste treatment system and method |
| CN116833204A (en) * | 2023-07-07 | 2023-10-03 | 广东盛力生态环境科技有限公司 | Kitchen waste treatment device beneficial to deoiling and desalting |
| CN116833204B (en) * | 2023-07-07 | 2023-12-12 | 广东盛力生态环境科技有限公司 | Kitchen waste treatment device beneficial to deoiling and desalting |
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