CN115193879B - Kitchen waste pretreatment process - Google Patents
Kitchen waste pretreatment process Download PDFInfo
- Publication number
- CN115193879B CN115193879B CN202210558214.5A CN202210558214A CN115193879B CN 115193879 B CN115193879 B CN 115193879B CN 202210558214 A CN202210558214 A CN 202210558214A CN 115193879 B CN115193879 B CN 115193879B
- Authority
- CN
- China
- Prior art keywords
- garbage
- kitchen
- slurry
- treatment
- impurities
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010806 kitchen waste Substances 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 65
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 65
- 239000002699 waste material Substances 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims description 41
- 239000002002 slurry Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000007787 solid Substances 0.000 claims description 26
- 230000005484 gravity Effects 0.000 claims description 20
- 239000004576 sand Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 9
- 230000001877 deodorizing effect Effects 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 239000003337 fertilizer Substances 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 24
- 239000004519 grease Substances 0.000 description 13
- 150000007524 organic acids Chemical class 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 6
- 235000005985 organic acids Nutrition 0.000 description 6
- 238000004537 pulping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000020477 pH reduction Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 230000026676 system process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 241000699670 Mus sp. Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- 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
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/35—Shredding, crushing or cutting
-
- 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
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/32—Compressing or compacting
-
- 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
- B09B3/60—Biochemical treatment, e.g. by using enzymes
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F9/00—Fertilisers from household or town refuse
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
- C12P7/52—Propionic acid; Butyric acids
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
- C12P7/54—Acetic acid
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
- C12P7/56—Lactic acid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/02—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of bagasse, megasse or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/70—Kitchen refuse; Food waste
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Biotechnology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kitchen waste pretreatment process, and relates to the technical field of waste treatment. The kitchen waste pretreatment process comprises the following steps: s1, conveying garbage, namely, firstly collecting kitchen garbage in a centralized manner, weighing and metering the collected kitchen garbage through a wagon balance, conveying the kitchen garbage into a receiving device through a conveying device, S2, roughly treating the garbage, wherein a bag breaking mechanical facility is arranged at the tail end of the receiving device in the S1, and after the garbage bag is broken, separating the garbage through a sorting machine, and then, feeding the garbage into a rough crusher for rough breaking. The kitchen garbage is cooperatively treated by the same treatment process, so that investment and operation cost can be saved for the collection and transportation links of the upstream links, the collection and transportation distance is reduced, the collection and transportation efficiency is improved, the separated garbage impurities do not need secondary return transportation, and the separated impurities can be used as fertilizer.
Description
Technical Field
The invention relates to the technical field of garbage disposal, in particular to a kitchen fruit and vegetable garbage pretreatment process.
Background
Three main modes of urban wet garbage treatment in China are anaerobic biogas production, biological culture and aerobic composting, so that various problems are encountered, and the quality of life of surrounding residents is seriously affected by odor dissipation; the garbage incineration plants are hard to select sites due to strong contradiction of surrounding people, and the 'neighbor avoidance' effect is prominent; the garbage compost products are not smooth in sales and have an unclear prospect. Along with the promotion and forced execution of household garbage classification, wet garbage such as kitchen garbage, fruit and vegetable garbage and the like are collected in a classification mode, transportation and treatment are particularly urgent, a large amount of current sorted wet garbage can not be solved according to a conventional technical route and a conventional mode in a short time, corresponding process technology innovation and matched hardware facilities are urgently needed for realizing the whole flow link of household garbage classification treatment, the conventional large kitchen garbage treatment facilities or equipment can only treat single materials generally, when the household garbage mixed in the kitchen garbage or kitchen garbage is too much, equipment is easy to damage, the treatment effect is poor, and the problems of low sorting efficiency, large occupied area of a process system, high ton treatment cost, large biogas slurry treatment difficulty, low resource conversion rate and the like exist. Anaerobic fermentation treatment facilities area is big, and the natural pond liquid is difficult to handle (C/N is low), restricts throughput and level and promotes, because kitchen, kitchen garbage, fruit vegetables rubbish have following characteristics: the invention provides a kitchen waste pretreatment process for kitchen, kitchen and fruit and vegetable waste, which has the advantages of high water content, high organic matter content, high impurity content, complex components, easy equipment damage, easy rot, easy odor generation, easy development of maggots and mice, easy acidification and corrosion of transportation vehicles and treatment equipment, high oil content, high viscosity, difficult solid-liquid separation, collection, transportation, large fluctuation range during treatment and easy complex biological reaction during long-time storage.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a kitchen waste, kitchen fruit and vegetable waste pretreatment process, which solves the problems of complex characteristics and difficult treatment of kitchen, kitchen waste and fruit and vegetable waste.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: a kitchen waste, kitchen fruit and vegetable waste pretreatment process comprises the following steps:
S1, conveying garbage
Firstly, after kitchen, kitchen waste and fruit and vegetable waste are collected in a centralized manner, the collected kitchen, kitchen waste and fruit and vegetable waste are weighed and measured through a wagon balance, and then are conveyed into a receiving device through a conveying device;
S2, coarse treatment of garbage
The method comprises the steps that (1) a bag breaking mechanical facility is arranged at the tail end of a receiving device in the step (S1), after a garbage bag is broken, garbage is separated by a separator and then enters a coarse crusher for coarse breaking;
S3, fine treatment of garbage
And S2, discharging the waste subjected to rough treatment in the step S2 into a gravity separation tank for gravity separation, treating the separated waste into slurry by using a refined slurry system, separating impurities in the slurry by using a sand and impurity removal system, extracting floating oil from the sand and impurity removed slurry by using an oil-water separation unit, and collecting the slurry obtained after the extraction.
Preferably, in the step S1, the material receiving device performs partition sealing treatment, and the material receiving device is provided with an exhaust pipe orifice, and the exhaust pipe orifice is connected with a deodorizing system pipeline through a pipeline.
Preferably, the particle size of the material coarsely crushed by the coarse crusher in the step S2 is smaller than 100mm, the sorting machine in the step S2 automatically separates uncrushable sundries with the particle size of more than 100mm in a mechanical sorting mode, and the uncrushed sundries are conveyed to a screw for screw extrusion to obtain solid residues, and then concentrated outward transportation treatment is carried out, wherein the water content of the solid residues is lower than 60%.
Preferably, the gravity separation tank in the step S3 separates heavy impurities in the roughly treated garbage through air separation and slurry washing, the density of the heavy impurities is more than 1.5g/cm 3, the heavy impurities are conveyed to a screw press through a screw to obtain solid residues, the solid residues are subjected to concentrated outward transportation treatment, and the water content of the solid residues is lower than 60%.
Preferably, in the step S3, the refined slurry system processes the garbage subjected to gravity separation into slurry with the particle size of 3-5mm in a manner of fine crushing, winnowing and extrusion.
Preferably, the impurities separated by the sand and impurity removing system in the step S3 are fine and heavy impurities, the fine and heavy impurities are conveyed to a screw press through a screw to obtain solid residues, then concentrated outward transportation treatment is carried out, and the water content of the solid residues is lower than 60%.
Preferably, the grease separated by the oil-water separation unit in the step S3 enters an oil-water separation tank for temporary storage, and the grease and scum with smaller density are removed from the surface of the device.
(III) beneficial effects
The invention provides a kitchen fruit and vegetable waste pretreatment process. The beneficial effects are as follows:
1. The kitchen fruit and vegetable waste pretreatment process provided by the invention can ensure the running stability, the types and components of the waste are complex, the device has certain fault tolerance capability, the running stability is ensured by adjusting the treatment capability and the efficiency, and the continuous production can be carried out without stopping when the special condition is met.
2. The invention can save investment and operation cost for the collection and transportation links of the upstream links by cooperatively treating three kinds of garbage of kitchen, kitchen waste and fruit and vegetable garbage by using the same set of treatment process, thereby reducing the collection and transportation distance, improving the collection and transportation efficiency and avoiding secondary return transportation of the separated household garbage impurities.
3. According to the invention, the household garbage impurities separated from kitchen, kitchen waste and fruit and vegetable garbage are separated and extruded and then can be sent to an incineration plant for power generation, grease separated from slurry can be recycled for producing biodiesel, and organic solid residues such as nondegradable lignin, cellulose and hemicellulose after fine separation and extrusion are used as composting raw materials.
4. The invention collects all sewage generated in the production process, then carries the sewage to a slurry tank in a sealing way for cooperative subsequent treatment, and carries out independent treatment on the sewage to a special deodorizing facility after negative pressure sealing collection, and the waste residues are extruded, dehydrated and collected in a unified way and then are transported to a garbage incineration plant for innocuous treatment, and measures such as vibration isolation, noise reduction and the like are adopted for noise, so that the odor emission amount of more than 60% is reduced, and the energy consumption is 30%.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
As shown in fig. 1, the embodiment of the invention provides a kitchen fruit and vegetable waste pretreatment process, which comprises the following steps:
S1, conveying garbage
Firstly, after kitchen, kitchen waste and fruit and vegetable waste are collected in a centralized manner, the collected kitchen, kitchen waste and fruit and vegetable waste are weighed and measured through a wagon balance and then conveyed into a receiving device through a conveying device, and an auxiliary surface conveying device is additionally arranged on the receiving device to prevent bridging or blockage of the waste;
S2, coarse treatment of garbage
The bag breaking mechanical facility is arranged at the tail end of the receiving device in the S1 step, the bag breaking mechanical facility is arranged at the tail end of the receiving device, so that manual bag breaking and sorting can be replaced, the bag breaking can enable wrapped organic degradable garbage to be released, after the garbage bag is broken, the garbage is separated by a separator and then enters a coarse crusher to be coarsely broken, under the action of the separator, the non-broken sundries with the particle size of more than 100mm are separated, and therefore damage to equipment is reduced, and meanwhile the equipment wear rate is greatly reduced;
S3, fine treatment of garbage
The waste after coarse treatment in the step S2 is discharged into a gravity separation tank for gravity separation, heavy and hard impurities in kitchen, kitchen and fruit and vegetable waste after the gravity separation system are removed, damage to subsequent equipment is avoided, equipment abrasion rate is greatly reduced, damage to subsequent pulping equipment is avoided, after the separated waste is treated into pulp by utilizing a refined pulp system, light impurities in the pulping process are separated out, fine and heavy impurities in the pulp are separated out through a sand removal and impurity removal system, abrasion and blockage caused by the sand removal and impurity removal system to the subsequent equipment, pumps, pipelines and the like are further prevented, floating oil extraction is carried out on the pulp after the sand removal and impurity removal is carried out through an oil-water separation unit, so that the influence on the efficiency of subsequent anaerobic degradation link caused by the excessive high oil content of the pulp is avoided, the water content and the impurity content of the pulp separated through the unit are not influenced by the further resource utilization of the grease, the raw materials obtained after the extraction are collected, the homogenized pulp part of kitchen, kitchen and fruit and vegetable waste is returned to a front end of a viscous and a sticky device, the secondary and the waste is further connected to a secondary and connected with a water-saving device for acidification reaction, and the secondary washing of the pulp is further realized.
And S1, performing partition sealing treatment on the material receiving device in the step of S1, wherein an exhaust pipe orifice is arranged on the material receiving device and is connected with a deodorizing system pipeline through a pipeline, so as to perform centralized deodorizing treatment.
And S2, the grain size of the materials coarsely crushed by the coarse crusher in the step S2 is 100mm, the separator automatically separates uncrushable sundries with the grain size of more than 100mm in a mechanical separation mode, and the uncrushable sundries are concentrated and transported after being conveyed to a screw press by a screw to obtain solid residues, the moisture content of the solid residues is lower than 60%, and under the action of the separator, the uncrushable sundries with the grain size of more than 100mm are separated, so that the damage to equipment is reduced, and meanwhile, the equipment wear rate is greatly reduced.
And S3, separating heavy impurities in the roughly treated garbage by a gravity separation tank through air separation and slurry washing, wherein the density of the heavy impurities is 1.5g/cm 3, the heavy impurities are conveyed to a screw for screw extrusion to obtain solid residues, then carrying out concentrated outward transportation treatment, the water content of the solid residues is 60%, and the impurities such as heavy matters, hard matters and the like in kitchen, kitchen wastes and fruit and vegetable garbage after passing through a gravity separation system are removed, so that the subsequent equipment is not damaged, the equipment wear rate is greatly reduced, and the damage to the subsequent pulping equipment is avoided.
And S3, the refined pulp system processes the garbage subjected to gravity separation into pulp with the particle size of 5mm in a fine crushing, winnowing and extrusion mode, so that the subsequent treatment of the pulp is facilitated.
And S3, the impurities separated by the sand and impurity removal system are fine and heavy impurities, the fine and heavy impurities are conveyed to a screw to be squeezed to obtain solid residues, then concentrated outward transportation treatment is carried out, the water content of the solid residues is lower than 60%, and after the fine and heavy impurities in the slurry are separated by the sand and impurity removal system, abrasion and blockage of subsequent equipment, pumps, pipelines and the like are further prevented.
And S3, the grease separated by the oil-water separation unit in the step S is temporarily stored in an oil-water separation tank, and grease and scum with smaller density are removed from the surface of the device, so that the problem that the oil content of slurry is too high to influence the efficiency of a subsequent anaerobic degradation link is avoided, and the water content and the impurity content of the grease separated by the unit do not influence the further recycling of the grease.
The slurry after passing through the sand and impurity removal system and the oil-water separation unit is homogeneous slurry with most impurities removed and uniform particle size and a large amount of organic matters, and is an excellent raw material for preparing volatile organic acids, the finally prepared slurry enters a volatile organic acid preparation system, the system stays for 8 days, the volatile organic acids are generated by utilizing the hydrolysis and acidification of anaerobic microorganisms, and VFAs (volatile organic acids) are ideal carbon sources of high-nitrogen low-carbon wastewater, and the slurry has the advantages of high nitrate decomposition rate, no toxic or side effect, rapid adaptation to the wastewater environment, no rejection and the like.
Embodiment two:
As shown in fig. 1, the embodiment of the invention provides a kitchen fruit and vegetable waste pretreatment process, which comprises the following steps:
S1, conveying garbage
Firstly, after kitchen, kitchen waste and fruit and vegetable waste are collected in a centralized manner, the collected kitchen, kitchen waste and fruit and vegetable waste are weighed and measured through a wagon balance and then conveyed into a receiving device through a conveying device, and an auxiliary surface conveying device is additionally arranged on the receiving device to prevent bridging or blockage of the waste;
S2, coarse treatment of garbage
The bag breaking mechanical facility is arranged at the tail end of the receiving device in the S1 step, the bag breaking mechanical facility is arranged at the tail end of the receiving device, so that manual bag breaking and sorting can be replaced, the bag breaking can enable wrapped organic degradable garbage to be released, after the garbage bag is broken, the garbage is separated by a separator and then enters a coarse crusher to be coarsely broken, under the action of the separator, the non-broken sundries with the particle size of more than 100mm are separated, and therefore damage to equipment is reduced, and meanwhile the equipment wear rate is greatly reduced;
S3, fine treatment of garbage
The waste after coarse treatment in the step S2 is discharged into a gravity separation tank for gravity separation, heavy and hard impurities in kitchen, kitchen and fruit and vegetable waste after the gravity separation system are removed, damage to subsequent equipment is avoided, equipment abrasion rate is greatly reduced, damage to subsequent pulping equipment is avoided, after the separated waste is treated into pulp by utilizing a refined pulp system, light impurities in the pulping process are separated out, fine and heavy impurities in the pulp are separated out through a sand removal and impurity removal system, abrasion and blockage caused by the sand removal and impurity removal system to the subsequent equipment, pumps, pipelines and the like are further prevented, floating oil extraction is carried out on the pulp after the sand removal and impurity removal is carried out through an oil-water separation unit, so that the influence on the efficiency of subsequent anaerobic degradation link caused by the excessive high oil content of the pulp is avoided, the water content and the impurity content of the pulp separated through the unit are not influenced by the further resource utilization of the grease, the raw materials obtained after the extraction are collected, the homogenized pulp part of kitchen, kitchen and fruit and vegetable waste is returned to a front end of a viscous and a sticky device, the secondary and the waste is further connected to a secondary and connected with a water-saving device for acidification reaction, and the secondary washing of the pulp is further realized.
And S1, performing partition sealing treatment on the material receiving device in the step of S1, wherein an exhaust pipe orifice is arranged on the material receiving device and is connected with a deodorizing system pipeline through a pipeline, so as to perform centralized deodorizing treatment.
And S2, the grain size of the materials coarsely crushed by the coarse crusher in the step S2 is smaller than 100mm, the separator automatically separates uncrushable sundries with the grain size of more than 100mm in a mechanical separation mode, and the uncrushable sundries are concentrated and transported outwards after being conveyed to the solid residues after being pressed by a screw, the water content of the solid residues is lower than 60%, and the uncrushable sundries with the grain size of more than 100mm are separated under the action of the separator, so that the damage to equipment is reduced, and meanwhile, the equipment wear rate is greatly reduced.
And S3, separating heavy impurities in the roughly treated garbage by a gravity separation tank through air separation and slurry washing, wherein the density of the heavy impurities is 1.5g/cm 3, the heavy impurities are conveyed to a screw for screw extrusion to obtain solid residues, then carrying out concentrated outward transportation treatment, the water content of the solid residues is 60%, and the impurities such as heavy matters, hard matters and the like in kitchen, kitchen wastes and fruit and vegetable garbage after passing through a gravity separation system are removed, so that the subsequent equipment is not damaged, the equipment wear rate is greatly reduced, and the damage to the subsequent pulping equipment is avoided.
And S3, the refined pulp system processes the garbage subjected to gravity separation into pulp with the particle size of 3mm in a fine crushing, winnowing and extrusion mode, so that the subsequent treatment of the pulp is facilitated.
And S3, the impurities separated by the sand and impurity removal system are fine and heavy impurities, the fine and heavy impurities are conveyed to a screw to be squeezed to obtain solid residues, then concentrated outward transportation treatment is carried out, the water content of the solid residues is lower than 60%, and after the fine and heavy impurities in the slurry are separated by the sand and impurity removal system, abrasion and blockage of subsequent equipment, pumps, pipelines and the like are further prevented.
And S3, the grease separated by the oil-water separation unit in the step S is temporarily stored in an oil-water separation tank, and grease and scum with smaller density are removed from the surface of the device, so that the problem that the oil content of slurry is too high to influence the efficiency of a subsequent anaerobic degradation link is avoided, and the water content and the impurity content of the grease separated by the unit do not influence the further recycling of the grease.
The slurry after passing through the sand and impurity removal system and the oil-water separation unit is homogeneous slurry with most impurities removed and uniform particle size and a large amount of organic matters, and is an excellent raw material for preparing volatile organic acids, finally the slurry enters a volatile organic acid preparation system, the system residence time is 5 days, the volatile organic acids are generated by utilizing the hydrolysis and acidification effects of anaerobic microorganisms, and VFAs (volatile organic acids) are ideal carbon sources of high-nitrogen low-carbon wastewater, and the slurry has the advantages of high nitrate decomposition rate, no toxic or side effect, rapid adaptation to the wastewater environment, and the like.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A kitchen waste pretreatment process is characterized in that: the method comprises the following steps:
S1, conveying garbage
Firstly, after the kitchen waste is collected in a centralized way, the collected kitchen waste is weighed and measured by a wagon balance and then is conveyed into a receiving device by a conveying device;
S2, coarse treatment of garbage
The method comprises the steps that (1) a bag breaking mechanical facility is arranged at the tail end of a receiving device in the step (S1), after a garbage bag is broken, garbage is separated by a separator and then enters a coarse crusher for coarse breaking;
S3, fine treatment of garbage
Discharging the waste subjected to rough treatment in the step S2 into a gravity separation tank for gravity separation, treating the separated waste into slurry by using a refined slurry system, separating impurities in the slurry by using a sand and impurity removal system, extracting floating oil from the sand and impurity removed slurry by using an oil-water separation unit, collecting the homogenized slurry obtained after extraction, and refluxing a homogenized slurry part of kitchen waste to the front end of a receiving device;
the particle size of the material coarsely crushed by the coarse crusher in the step S2 is smaller than 100mm, the sorting machine in the step S2 automatically separates uncrushable sundries with the particle size of more than 100mm in a mechanical sorting mode, and the uncrushed sundries are conveyed to a screw for screw extrusion to obtain solid residues, and then concentrated outward transportation treatment is carried out, wherein the water content of the solid residues is lower than 60%;
Separating heavy impurities in the roughly treated garbage by a gravity separation tank in the step S3 through air separation and slurry washing, wherein the density of the heavy impurities is more than 1.5g/cm 3, the heavy impurities are conveyed to a screw for screw pressing to obtain solid residues, and then concentrated outward transportation treatment is carried out, and the water content of the solid residues is lower than 60%;
In the step S1, the material receiving device performs partition sealing treatment, and is provided with an exhaust pipe orifice which is connected with a deodorizing system pipeline through a pipeline;
And (3) processing the garbage subjected to gravity separation into slurry with the particle size of 3-5 mm by the refined slurry system in the step S3 through fine crushing, air separation and extrusion.
2. The kitchen waste pretreatment process according to claim 1, wherein: and S3, the impurities separated by the sand and impurity removing system in the step are fine and heavy impurities, the fine and heavy impurities are conveyed to a screw press through a screw to obtain solid residues, then concentrated outward transportation treatment is carried out, and the water content of the solid residues is lower than 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210558214.5A CN115193879B (en) | 2022-05-20 | 2022-05-20 | Kitchen waste pretreatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210558214.5A CN115193879B (en) | 2022-05-20 | 2022-05-20 | Kitchen waste pretreatment process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115193879A CN115193879A (en) | 2022-10-18 |
| CN115193879B true CN115193879B (en) | 2024-05-17 |
Family
ID=83574468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210558214.5A Active CN115193879B (en) | 2022-05-20 | 2022-05-20 | Kitchen waste pretreatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115193879B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925361A (en) * | 2016-04-13 | 2016-09-07 | 江苏维尔利环保科技股份有限公司 | Pretreatment method of anaerobic digestion treatment of kitchen garbage |
| CN110343726A (en) * | 2019-06-04 | 2019-10-18 | 无锡市政设计研究院有限公司 | A kind of cooperative processing method of food garbage and rubbish from cooking |
| CN112139215A (en) * | 2020-09-16 | 2020-12-29 | 成都市兴蓉再生能源有限公司 | Kitchen waste and kitchen waste synergistic pretreatment method |
| CN113714260A (en) * | 2021-09-06 | 2021-11-30 | 华东理工大学 | Kitchen waste sand and oil removing pretreatment method and device |
-
2022
- 2022-05-20 CN CN202210558214.5A patent/CN115193879B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925361A (en) * | 2016-04-13 | 2016-09-07 | 江苏维尔利环保科技股份有限公司 | Pretreatment method of anaerobic digestion treatment of kitchen garbage |
| CN110343726A (en) * | 2019-06-04 | 2019-10-18 | 无锡市政设计研究院有限公司 | A kind of cooperative processing method of food garbage and rubbish from cooking |
| CN112139215A (en) * | 2020-09-16 | 2020-12-29 | 成都市兴蓉再生能源有限公司 | Kitchen waste and kitchen waste synergistic pretreatment method |
| CN113714260A (en) * | 2021-09-06 | 2021-11-30 | 华东理工大学 | Kitchen waste sand and oil removing pretreatment method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115193879A (en) | 2022-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103121859B (en) | A kind of Kitchen waste on-site treatment method | |
| CN101224999B (en) | Anaerobic digestion handling method for restaurant garbage | |
| CN103074381A (en) | Efficient resourceful treatment method through separation and anaerobic fermentation for kitchen waste | |
| CN207929755U (en) | A kind of restaurant garbage treating system | |
| CN103084380A (en) | Municipal solid waste processing system and processing method | |
| CN111408601A (en) | Kitchen waste resource utilization method and treatment system | |
| CN111085526A (en) | Method for treating small-scale kitchen waste in cities and towns | |
| CN114378105A (en) | Kitchen waste and cellulose biomass synergistic multi-stage treatment system and method | |
| CN113477018A (en) | Wet garbage resourceful treatment method and treatment system | |
| CN115301672A (en) | Comprehensive treatment method for kitchen garbage | |
| CN213559105U (en) | Urban organic waste cooperative recycling treatment system | |
| CN112501214B (en) | Two-phase anaerobic treatment system and method for reinforcing wet garbage in villages and towns | |
| CN110125151A (en) | Fruits and vegetables garbage anaerobic fermentation preprocess method and its pretreatment system | |
| CN113333444A (en) | Kitchen garbage crushing treatment system | |
| CN210945410U (en) | Distributed integrated kitchen garbage and fertilizer making equipment | |
| CN115193879B (en) | Kitchen waste pretreatment process | |
| CN215403931U (en) | Regional organic waste coprocessing system | |
| CN111362732A (en) | Intelligent kitchen waste recycling treatment system and method | |
| CN112058854A (en) | Kitchen waste dehydration composting process and system | |
| CN110834030A (en) | Kitchen waste treatment system | |
| CN212833520U (en) | Automatic processing system of kitchen waste biological digestion method | |
| CN212770497U (en) | Household perishable organic garbage processor | |
| CN210023227U (en) | Fruit vegetables rubbish anaerobic fermentation pretreatment systems | |
| CN113305135A (en) | Kitchen waste biological treatment system | |
| CN112474711A (en) | Kitchen waste treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |