CN220837183U - Kitchen waste and sludge cooperative treatment system - Google Patents
Kitchen waste and sludge cooperative treatment system Download PDFInfo
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- CN220837183U CN220837183U CN202322020728.8U CN202322020728U CN220837183U CN 220837183 U CN220837183 U CN 220837183U CN 202322020728 U CN202322020728 U CN 202322020728U CN 220837183 U CN220837183 U CN 220837183U
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- 239000010802 sludge Substances 0.000 title claims abstract description 49
- 239000010806 kitchen waste Substances 0.000 title claims abstract description 37
- 230000018044 dehydration Effects 0.000 claims abstract description 53
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 53
- 238000001035 drying Methods 0.000 claims abstract description 53
- 238000000746 purification Methods 0.000 claims abstract description 49
- 230000029087 digestion Effects 0.000 claims abstract description 48
- 238000003763 carbonization Methods 0.000 claims abstract description 40
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 239000010865 sewage Substances 0.000 claims description 55
- 238000003860 storage Methods 0.000 claims description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 36
- 239000003546 flue gas Substances 0.000 claims description 36
- 239000002351 wastewater Substances 0.000 claims description 18
- 238000010000 carbonizing Methods 0.000 claims description 15
- 238000010411 cooking Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000001877 deodorizing effect Effects 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000012071 phase Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 7
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 238000004537 pulping Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000001143 conditioned effect Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 30
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 239000003921 oil Substances 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011278 co-treatment Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002036 drum drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a kitchen waste and sludge cooperative treatment system, which comprises a biogas purification system, an anaerobic digestion treatment system, a biogas residue dehydration system and a drying and carbonization system which are sequentially communicated, wherein kitchen waste is input into the anaerobic digestion treatment system, generated biogas is input into the biogas purification system for treatment, generated biogas slurry is input into the biogas residue dehydration system for treatment, and biogas residues separated by the biogas residue dehydration system and sludge are conveyed to the drying and carbonization system together, and the drying and carbonization system comprises drying equipment, carbonization equipment and a hot blast stove; the output of the biogas purification system is communicated with the hot blast stove of the drying and carbonization system, and part of biogas treated by the biogas purification system is conveyed into the hot blast stove for combustion, so that a heat source is provided for drying equipment and carbonization equipment.
Description
Technical Field
The utility model relates to the technical field of sludge treatment, in particular to a kitchen waste and sludge cooperative treatment system.
Background
At present, most domestic kitchen waste treatment adopts a process of producing methane by anaerobic digestion, and one part of the produced methane is used for pretreatment, cooking and oil extraction, and the other part of the produced methane is used for generating power or purifying gas for sale.
The prior art CN105861287A discloses a high-efficiency wet anaerobic digestion treatment system for kitchen waste, which comprises a desulfurizing tower, a dryer, a biogas slurry tank, a raw material receiving tank, a raw material sorting machine, a heating tank, a CSTR fermentation tank, an integrated fermentation tank and a centrifugal separator which are sequentially connected, wherein a solid medium outlet of the centrifugal separator is connected with the dryer, the solid medium is dried by the dryer to obtain an organic fertilizer, and a liquid medium outlet of the centrifugal separator is connected with the biogas slurry tank; and gas outlets of the CSTR fermentation tank and the integrated fermentation tank are respectively connected with the desulfurizing tower. According to the scheme, the anaerobic digestion system and the cogeneration system are combined, methane generated by the anaerobic digestion system can be used as fuel of the cogeneration system, and heat energy generated by a steam boiler in the cogeneration system provides waste heat utilization for the anaerobic digestion system. The technical proposal does not mention a treatment method of biogas residues and sludge.
Prior art CN217616788U has a carbomorphism device for kitchen garbage, including carbomorphism device body, base, carbomorphism device body installs on the base, installs the feeder hopper on the carbomorphism device body, installs the pretreatment case that is located the position above the feeder hopper on the base, and the one end that the pretreatment case is close to the feeder hopper is installed and is softened a section of thick bamboo, softens and installs the heating element that is used for the material to soften in the section of thick bamboo, softens the one end that the section of thick bamboo is close to the feeder hopper and installs row feed cylinder. The technical proposal does not mention a biogas utilization and sludge treatment method.
In view of the above technical problems, the present utility model is particularly directed.
Disclosure of Invention
The utility model mainly aims to provide a kitchen waste and sludge cooperative treatment system which is used for solving the problems that biogas residues and biogas are difficult to go out in the existing kitchen waste treatment and the energy consumption is high in the sludge treatment.
In order to achieve the above purpose, the utility model provides a kitchen waste and sludge cooperative treatment system, which comprises a biogas purification system, an anaerobic digestion treatment system, a biogas residue dehydration system and a drying and carbonizing system which are sequentially communicated, wherein kitchen waste is input into the anaerobic digestion treatment system, generated biogas is input into the biogas purification system for treatment, generated biogas slurry is input into the biogas residue dehydration system for treatment, biogas residues separated by the biogas residue dehydration system and sludge are conveyed to the drying and carbonizing system, and the drying and carbonizing system comprises drying equipment, carbonizing equipment and a hot blast stove; the output of the biogas purification system is communicated with the hot blast stove of the drying and carbonization system, and part of biogas treated by the biogas purification system is conveyed into the hot blast stove for combustion, so that a heat source is provided for drying equipment and carbonization equipment.
Further, the cooperative treatment system also comprises a pretreatment system, the output of the pretreatment system is communicated with the anaerobic digestion treatment system, and the output of the biogas purification system is also communicated with the pretreatment system and/or the anaerobic digestion treatment system.
Further, the pretreatment system comprises a cooking pot, the anaerobic digestion treatment system comprises a medium-temperature anaerobic digestion pot, and part of methane treated by the methane purification system burns to supply heat for the cooking pot and/or the medium-temperature anaerobic digestion pot.
Further, the cooperative treatment system also comprises a sewage temporary storage system, the input of the sewage temporary storage system is communicated with the biogas residue dehydration system, and the liquid phase remained after the biogas residue dehydration system separates out the biogas residue enters the sewage temporary storage system for storage.
Further, the cooperative treatment system further comprises a flue gas purification system, the flue gas purification system is communicated with the output of the drying carbonization system, the output of the flue gas purification system is communicated with the sewage temporary storage system, and wastewater generated by flue gas treatment of the flue gas purification system is led into the sewage temporary storage system for storage.
Further, the flue gas cleaning system comprises one or a combination of several of the following devices: cyclone dust collector, cloth bag dust collector, wet deacidification equipment, white smoke eliminating equipment and active carbon adsorber.
Further, the cooperative treatment system also comprises a deep dehydration system, the input and the output of the deep dehydration system are respectively communicated with the biogas residue dehydration system and the drying carbonization system, the output of the deep dehydration system is communicated with the sewage temporary storage system, and the filter pressing liquid wastewater generated by the deep dehydration system is led into the sewage temporary storage system for storage.
Further, the deep dehydration system comprises a conditioning device and a plate-and-frame filter press, and biogas residues and sludge are conditioned by the conditioning device and dehydrated by the plate-and-frame filter press and then are input into the drying equipment.
Further, the cooperative treatment system also comprises a sewage treatment system, the input of the sewage treatment system is communicated with the sewage temporary storage system, the mixed wastewater in the sewage temporary storage system is input into the sewage treatment system for treatment, and the treated reclaimed water is conveyed to the deep dehydration system and/or the flue gas purification system for use.
Further, the co-processing system also comprises a deodorizing system, wherein the input of the deodorizing system is communicated with the pretreatment system and the biogas residue dehydration system, and the output of the deodorizing system is communicated with the hot blast stove.
Further, the pretreatment system further comprises a large-substance sorting machine, a sand remover and a sorting pulping integrated machine, wherein the large-substance sorting machine and the sand remover remove inorganic impurities from kitchen wastes, and the kitchen wastes are made into pulp through the sorting pulping integrated machine.
Further, the pretreatment system further comprises a three-phase centrifugal oil extraction machine, the three-phase centrifugal oil extraction machine is communicated with the cooking pot, the cooking pot heats the slurry, coarse grease is separated by the three-phase centrifugal oil extraction machine, and the residual materials enter the anaerobic digestion treatment system.
Further, the drying equipment comprises a rotary dryer and an induced draft fan, and drying flue gas generated by the hot blast stove enters the rotary dryer under the negative pressure of the induced draft fan.
Further, the carbonization equipment comprises a rotary kiln carbonization furnace, the rotary kiln carbonization furnace comprises a reactor furnace tube and a furnace shell, and carbonized flue gas generated by the hot blast stove flows through a jacket between the reactor furnace tube and the furnace shell.
Further, the weight ratio of the kitchen waste to the sludge cooperatively treated in the cooperatively treating system is 1:0.8 to 1:1.
By applying the technical scheme of the utility model, at least the following beneficial effects are realized:
1. The co-processing system provides energy supply for the co-drying carbonization of the biogas residues and the sludge by conveying the biogas generated after the anaerobic digestion treatment of the kitchen waste into the hot blast stove after the treatment of the biogas purification system, improves the biogas utilization rate in the kitchen waste treatment process, and also solves the problems of high energy consumption and high operation cost in the sludge incineration or drying carbonization process and the need of external energy supply.
2. The co-processing system can provide heat for the pretreatment system and the anaerobic digestion treatment system by burning part of methane processed by the methane purification system, so that the methane can be fully used in the co-processing system, and the energy self-supply rate of the co-processing system is further enhanced.
3. The sewage temporary storage system stores various waste water from the biogas residue dehydration system, the deep dehydration system and the flue gas purification system, and the waste water is uniformly conveyed to the sewage treatment system for treatment and then is reused, so that the sewage treatment efficiency and the water resource utilization rate of the sewage temporary storage system are improved.
4. The cooperative treatment system separates crude oil and inorganic impurities by arranging the pretreatment system, obtains biogas residues by the anaerobic digestion treatment system and the biogas residue dehydration system, and dries and carbonizes the biogas residues and the sludge to form biochar, thereby effectively combining kitchen waste treatment and sludge treatment and widening the recycling outlet of kitchen waste and sludge.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a schematic diagram of a kitchen waste and sludge co-treatment system according to an embodiment.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
The utility model is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the utility model as claimed. The term "comprising" when used indicates the presence of a feature, but does not preclude the presence or addition of one or more other features; the positional or positional relationship indicated by the terms "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., are based on the positional or positional relationship shown in the drawings, are for convenience of description only, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model; furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description, unless clearly indicated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
The kitchen waste and sludge cooperative treatment system provided by the application effectively combines kitchen treatment and sludge treatment aiming at the defects of the prior art route, and achieves better technology by cooperative treatment.
Examples:
As shown in fig. 1, the utility model provides a kitchen waste and sludge cooperative treatment system. The main process flow of the kitchen waste treatment comprises a pretreatment system, an anaerobic digestion treatment system and a biogas residue dehydration system which are sequentially communicated. The system also comprises a biogas purification system which is communicated with the anaerobic digestion treatment system. The kitchen waste is firstly input into a pretreatment system to remove inorganic impurities, crude grease is extracted by digestion, the rest materials are input into an anaerobic digestion treatment system to be treated, the generated biogas is input into a biogas purification system to be treated, the generated biogas slurry is input into a biogas residue dehydration system to be treated, and biogas residues are separated out through the biogas residue dehydration system.
The separated biogas residues and the transported sludge are conveyed to a drying and carbonizing system together, and the biogas residues and the transported sludge are subjected to drying and carbonizing to form biochar and then are transported to the outside. Thereby reducing and harmlessly treating biogas residues and sludge which are difficult to go out of the way and widening the recycling way. The drying and carbonizing system comprises drying equipment, carbonizing equipment and a hot blast stove, and the hot blast stove provides high-temperature flue gas for the drying equipment and the carbonizing equipment respectively.
In the application, the output of the biogas purification system is communicated with the hot blast stove of the drying and carbonization system, and the biogas treated by the biogas purification system is at least partially conveyed into the hot blast stove for combustion, so as to provide a heat source for drying equipment and carbonization equipment. The co-processing system provides energy supply for the co-drying carbonization of the biogas residues and the sludge by conveying the biogas generated after the anaerobic digestion treatment of the kitchen waste into the hot blast stove after the treatment of the biogas purification system, improves the biogas utilization rate in the kitchen waste treatment process, and also solves the problems of high energy consumption and high operation cost in the sludge incineration or drying carbonization process and the need of external energy supply.
The biogas purification system mainly dehumidifies, desulphurizes and stores biogas, and then part of the biogas is sent to the sludge drying and carbonizing system to be used as a heat source, and the other part of the biogas is sent to a boiler to be used for producing steam or generating electricity.
In addition, the output of the biogas purification system is also communicated with the pretreatment system and/or the anaerobic digestion treatment system. That is, the biogas generated by the anaerobic digestion treatment system is preferably input into the pretreatment system and the anaerobic digestion treatment system respectively for use in addition to partial biogas which is transmitted to the hot blast stove of the drying and carbonization system.
In particular, the pretreatment system comprises a cooking device, preferably a cooking tank, for cooking the extracted oil in the pretreatment. The anaerobic digestion treatment system preferably comprises a moderate-temperature anaerobic digestion tank, preferably, the reaction temperature of the moderate-temperature anaerobic digestion tank in the wet anaerobic digestion treatment system is about 35 ℃, the solid content of the digestion feed is about 8-10%, and the moderate-temperature anaerobic digestion tank can degrade volatile suspended matters in the liquid phase of the food waste to generate biogas and enter the purification system. Part of the biogas treated by the biogas purifying system is introduced into a gas boiler for combustion, and steam is generated to supply heat for the digestion tank and/or the medium-temperature anaerobic digestion tank.
The co-processing system can provide heat for the pretreatment system and the anaerobic digestion treatment system by burning part of methane processed by the methane purification system, so that the methane can be fully used in the co-processing system, and the energy self-supply rate of the co-processing system is further enhanced.
As shown in figure 1, the main process flow of the biogas residue and sludge cooperative treatment comprises a deep dehydration system, a drying carbonization system and a flue gas purification system which are sequentially communicated. The input and the output of the deep dehydration system are respectively communicated with the biogas residue dehydration system and the drying carbonization system, the deep dehydration system comprises a conditioning device and a plate-and-frame filter press, the water content of the sludge and the biogas residue is about 80%, and the water content of the biogas residue and the sludge is reduced to below 60% after the biogas residue and the sludge are conditioned by the conditioning device and dehydrated by the plate-and-frame filter press.
Sequentially inputting biogas residue and sludge with water content below 60% into a drying device and a carbonization device, and cracking organic matters in the biogas residue and sludge at high temperature under an anaerobic or anoxic state to generate biochar. A large amount of smoke can be generated in the drying and carbonizing process of the drying and carbonizing system, the smoke purifying system is communicated with the output of the drying and carbonizing system, and the smoke purifying system comprises one or a combination of several of the following devices: cyclone dust collector, cloth bag dust collector, wet deacidification equipment, white smoke eliminating equipment and active carbon adsorber. The flue gas can be discharged after reaching the standard through the flue gas purification system.
In the application, the cooperative treatment system also comprises a sewage temporary storage system, wherein the input of the sewage temporary storage system is communicated with the biogas residue dehydration system, and the liquid phase remained after the biogas residue dehydration system separates out the biogas residue enters the sewage temporary storage system for storage.
Preferably, the output of the flue gas purification system is communicated with the sewage temporary storage system, and the wastewater generated by flue gas treatment by the flue gas purification system is led into the sewage temporary storage system for storage.
Preferably, the output of the deep dehydration system is communicated with the sewage temporary storage system, and the filter pressing liquid wastewater generated by the deep dehydration system is led into the sewage temporary storage system for storage. The mixed wastewater in the sewage temporary storage system includes, but is not limited to, wastewater generated from a biogas residue dehydration system, a flue gas purification system and a deep dehydration system.
The cooperative treatment system also comprises a sewage treatment system, the input of the sewage treatment system is communicated with the sewage temporary storage system, the mixed wastewater in the sewage temporary storage system is input into the sewage treatment system for treatment, and the treated reclaimed water is conveyed to the deep dehydration system and/or the flue gas purification system for use. In practice, most sewage treatment systems are sewage treatment plants, which treat mixed wastewater in a sewage temporary storage system together, and flushing water required by a deep dehydration system and reclaimed water used for flue gas treatment by a flue gas purification system are both from the sewage treatment plants. Furthermore, it is preferred that at least part of the sludge for co-treatment also comes from the sewage treatment plant.
The sewage temporary storage system stores various waste water from the biogas residue dehydration system, the deep dehydration system and the flue gas purification system, and the waste water is uniformly conveyed to the sewage treatment system for treatment and then is reused, so that the sewage treatment efficiency and the water resource utilization rate of the sewage temporary storage system are improved.
Preferably, the co-processing system further comprises a deodorizing system, wherein the input of the deodorizing system is communicated with the pretreatment system and the biogas residue dehydration system, and the output of the deodorizing system is communicated with the hot blast stove. The deodorizing system comprises an odor collecting device and an odor treatment device, wherein the odor collecting and treating device is used for collecting and treating the odor of point sources and surface sources in places such as a pretreatment system, a biogas residue dewatering system and a sewage treatment area, part of combustible gas after the odor is collected is conveyed to a hot blast stove for supplying air, and the rest of the odor is deodorized by a chemical combination biological method.
Preferably, the pretreatment system further comprises a large-substance sorting machine, a sand remover and a sorting and pulping integrated machine, wherein the large-substance sorting machine and the sand remover remove inorganic impurities from kitchen wastes, and the kitchen wastes are made into pulp through the sorting and pulping integrated machine. The slurry is fed into a digester.
Further, the pretreatment system further comprises a three-phase centrifugal oil extraction machine, the three-phase centrifugal oil extraction machine is communicated with a cooking pot, the cooking pot is used for heating slurry, and after coarse grease is separated out through the three-phase centrifugal oil extraction machine, the residual materials enter the anaerobic digestion treatment system. Preferably, in the process of separating the crude oil, the separated organic solid phase or oil can be conveyed to a deep dehydration system together with biogas residues and sludge.
Preferably, the drying equipment comprises a rotor dryer and an induced draft fan, the drying adopts drum drying with direct contact of flue gas, and the temperature of the drying flue gas is 300-400 ℃. Under the action of a cylinder body of the dryer and a rotor wing rotating at a high speed in the dryer, wet sludge is thrown in a drying cavity, and drying flue gas generated by a hot blast stove is in wave turbulence along the horizontal direction under the action of negative pressure of a draught fan, so that materials do reciprocating spiral motion in the dryer under the action of air flow and gravity, and the dispersed materials are fully contacted with hot air for heat exchange.
Preferably, the carbonization process is medium-high temperature carbonization, and the carbonization temperature is 500-650 ℃. The carbonization equipment comprises a rotary kiln carbonization furnace, the rotary kiln carbonization furnace comprises a reactor furnace tube and a furnace shell, carbonized flue gas generated by the hot blast stove flows through a jacket between the reactor furnace tube and the furnace shell, heat is transferred to the reactor furnace tube and materials in a convection heat exchange mode, the materials reach 500-650 ℃, pyrolysis carbonization reaction is completed, and reduction, harmless and recycling treatment of sludge are finally realized.
In summary, the weight ratio of the kitchen waste to the sludge cooperatively treated in the cooperatively treating system is 1:0.8 to 1: 1. The co-processing scale can better realize the functions of the co-processing system in the interval.
In summary, from the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:
1. The co-processing system provides energy supply for the co-drying carbonization of the biogas residues and the sludge by conveying the biogas generated after the anaerobic digestion treatment of the kitchen waste into the hot blast stove after the treatment of the biogas purification system, improves the biogas utilization rate in the kitchen waste treatment process, and also solves the problems of high energy consumption and high operation cost in the sludge incineration or drying carbonization process and the need of external energy supply.
2. The co-processing system can provide heat for the pretreatment system and the anaerobic digestion treatment system by burning part of methane processed by the methane purification system, so that the methane can be fully used in the co-processing system, and the energy self-supply rate of the co-processing system is further enhanced.
3. The sewage temporary storage system stores various waste water from the biogas residue dehydration system, the deep dehydration system and the flue gas purification system, and the waste water is uniformly conveyed to the sewage treatment system for treatment and then is reused, so that the sewage treatment efficiency and the water resource utilization rate of the sewage temporary storage system are improved.
4. The cooperative treatment system separates crude oil and inorganic impurities by arranging the pretreatment system, obtains biogas residues by the anaerobic digestion treatment system and the biogas residue dehydration system, and dries and carbonizes the biogas residues and the sludge to form biochar, thereby effectively combining kitchen waste treatment and sludge treatment and widening the recycling outlet of kitchen waste and sludge.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (13)
1. A kitchen waste and sludge cooperative treatment system is characterized in that: the kitchen waste is input into the anaerobic digestion treatment system, generated biogas is input into the biogas purification system for treatment, generated biogas slurry is input into the biogas residue dehydration system for treatment, and biogas residues separated by the biogas residue dehydration system and the sludge are conveyed to the drying and carbonization system together, wherein the drying and carbonization system comprises drying equipment, carbonization equipment and a hot blast stove;
The output of the biogas purification system is communicated with the hot blast stove of the drying and carbonizing system, and part of biogas treated by the biogas purification system is conveyed into the hot blast stove for combustion, so as to provide a heat source for the drying equipment and the carbonizing equipment;
The co-processing system further comprises a sewage temporary storage system, wherein the input of the sewage temporary storage system is communicated with the biogas residue dehydration system, and the liquid phase remained after the biogas residue dehydration system separates out the biogas residue enters the sewage temporary storage system for storage;
the co-processing system further comprises a flue gas purification system, the flue gas purification system is communicated with the output of the drying carbonization system, the output of the flue gas purification system is communicated with the sewage temporary storage system, and wastewater generated by flue gas treatment of the flue gas purification system is led into the sewage temporary storage system for storage.
2. The co-processing system of claim 1, wherein: the co-processing system further comprises a pretreatment system, wherein the output of the pretreatment system is communicated with the anaerobic digestion treatment system, and the output of the biogas purification system is also communicated with the pretreatment system and/or the anaerobic digestion treatment system.
3. The co-processing system of claim 2, wherein: the pretreatment system comprises a digestion tank, the anaerobic digestion treatment system comprises a medium-temperature anaerobic digestion tank, and part of biogas treated by the biogas purification system burns to supply heat for the digestion tank and/or the medium-temperature anaerobic digestion tank.
4. A co-processing system according to claim 3, wherein: the flue gas purification system comprises one or a combination of several of the following devices: cyclone dust collector, cloth bag dust collector, wet deacidification equipment, white smoke eliminating equipment and active carbon adsorber.
5. A co-processing system according to claim 3, wherein: the co-processing system further comprises a deep dehydration system, wherein the input and the output of the deep dehydration system are respectively communicated with the biogas residue dehydration system and the drying carbonization system, the output of the deep dehydration system is communicated with the sewage temporary storage system, and the filter pressing liquid wastewater generated by the deep dehydration system is led into the sewage temporary storage system for storage.
6. The co-processing system of claim 5, wherein: the deep dehydration system comprises a conditioning device and a plate-and-frame filter press, wherein biogas residues and sludge are conditioned by the conditioning device and dehydrated by the plate-and-frame filter press, and then are input into the drying equipment.
7. The co-processing system of claim 5, wherein: the cooperative treatment system further comprises a sewage treatment system, the input of the sewage treatment system is communicated with the sewage temporary storage system, mixed wastewater in the sewage temporary storage system is input into the sewage treatment system for treatment, and treated reclaimed water is conveyed to the deep dehydration system and/or the flue gas purification system for use.
8. The co-processing system of claim 2, wherein: the co-processing system further comprises a deodorizing system, wherein the input of the deodorizing system is communicated with the pretreatment system and the biogas residue dehydration system, and the output of the deodorizing system is communicated with the hot blast stove.
9. A co-processing system according to claim 3, wherein: the pretreatment system further comprises a large-substance sorting machine, a sand remover and a sorting and pulping integrated machine, wherein the large-substance sorting machine and the sand remover remove inorganic impurities from the kitchen waste, and the kitchen waste is made into pulp through the sorting and pulping integrated machine.
10. The co-processing system of claim 9, wherein: the pretreatment system further comprises a three-phase centrifugal oil extraction machine, the three-phase centrifugal oil extraction machine is communicated with the cooking pot, the cooking pot heats the slurry, and after coarse grease is separated by the three-phase centrifugal oil extraction machine, the residual materials enter the anaerobic digestion treatment system.
11. The co-processing system of claim 1, wherein: the drying equipment comprises a rotary dryer and an induced draft fan, and drying flue gas generated by the hot blast stove enters the rotary dryer under the action of negative pressure of the induced draft fan.
12. The co-processing system of claim 1, wherein: the carbonization equipment comprises a rotary kiln carbonization furnace, wherein the rotary kiln carbonization furnace comprises a reactor furnace tube and a furnace shell, and carbonized flue gas generated by the hot blast stove flows through a jacket between the reactor furnace tube and the furnace shell.
13. The co-processing system of claim 1, wherein: the weight ratio of the kitchen waste to the sludge which are cooperatively treated in the cooperative treatment system is 1:0.8 to 1: 1.
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| CN202322020728.8U CN220837183U (en) | 2023-07-28 | 2023-07-28 | Kitchen waste and sludge cooperative treatment system |
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