CN204220605U - The comprehensive food waste treatment system of high efficiency low power consuming - Google Patents
The comprehensive food waste treatment system of high efficiency low power consuming Download PDFInfo
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- CN204220605U CN204220605U CN201420688823.3U CN201420688823U CN204220605U CN 204220605 U CN204220605 U CN 204220605U CN 201420688823 U CN201420688823 U CN 201420688823U CN 204220605 U CN204220605 U CN 204220605U
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Abstract
The utility model relates to a kind of comprehensive food waste treatment system of high efficiency low power consuming, comprises Pre-sorting device, processing equipment for pulverizing, anaerobic digestion device, methane purifying device, centrifuge, natural pond Slag treatment device, oily-water seperating equipment, hydrolysis acidification device, biogas oxidation unit and natural pond hydraulic control amount loop back device; Pre-sorting device, processing equipment for pulverizing, oily-water seperating equipment, hydrolysis acidification device, anaerobic digestion device, centrifuge are connected with pipeline successively with natural pond hydraulic control amount loop back device; Anaerobic digestion device is connected with biogas oxidation unit and methane purifying device with pipeline respectively; Centrifuge pipeline is also connected with natural pond Slag treatment device; Natural pond hydraulic control amount loop back device pipeline is connected with hydrolysis acidification device.The utility model total system can reclaim the resource of reproducible utilization in changing food waste effectively, reduces its taking and polluting environmental resource, obtains good economic and social benefit, makes resources circulation obtain good utilization.
Description
[
technical field]
The integrated treatment that the utility model relates to rubbish utilizes system, particularly the recycling treatment system of changing food waste, particularly relates to the total system of changing food waste.
[
background technology]
Before one minute or delicacies, after one minute, become rubbish.The output of changing food waste is increasing, estimates to account for more than 50% of domestic waste total amount; Changing food waste main component comprises rice and flours food residues, vegetables, vegetable and animals oils, meat bone etc.; Chemically on composition, comprise starch, cellulose, protein, lipid and inorganic salts.Changing food waste main feature is that content of organics is abundant, moisture is high, very easily rots, distribute stench, its proterties and smell all can make a very bad impression to environmental sanitation, and easily grow the harmful substance such as pathogenic microorganism, mycotoxin, its harm directly affects the appearance of the city health in city, cause insect pest, the plague of rats, even transmission; More seriously, part changing food waste is unprocessed and be processed into " waste oil " and come into the market or flow to underground plant to become feed, and the life and health of the people in serious threat.
Nutritious changing food waste can be valuable renewable resource originally.But owing to there is no appropriate techniques and methods, not only not by effective recycling, cause serious environmental pollution on the contrary, and become the dangerous matter sources affecting food security and ecological safety, as " rubbish meat " problem, " waste oil " problem.
The main processing ways of changing food waste comprises both at home and abroad at present: burning, compost, landfill, Fodder making and anaerobic fermentation, be hereby simply described as follows:
1. burning disposal: subtract appearance effective, some developed countries adopt in this way, but, because its moisture is high and calorific value is low, not only can not meet the caloric value requirement of waste incineration and generating electricity, greatly can increase processing cost on the contrary, the gas-solid product simultaneously produced due to imperfect combustion is as the health of meeting harm humans after dioxin;
2. compost treatment: because its moisture content is up to 80%, need to add other auxiliary materials, this increases not only treating capacity and floor space, and fertilizer efficiency and quality thereof can be had influence on;
3. landfill: resource level is extremely low, take valuable land resource, also add the generation of percolate and there is differential settlement possibility, thus landfill yard is worked the mischief, directly have influence on the natural resources such as underground water and air, cause secondary pollution, the health of harm humans, cause the waste of large amount of organic;
4. be made into protein feed: a kind of mode being considered to recycling treatment changing food waste, but up-to-date research shows, make animal feed with changing food waste and potential safety hazard and potential risk are also existed to the mankind;
5. anaerobic fermentation method: be utilize biodegradation, is converted into biogas as the energy using organic matter wherein, and after anaerobic fermentation, natural pond slag, natural pond liquid obtain stabilization processes, can as the fertilizer of high-quality.
Based on these technology existing, people have also been invented multiple different treatment process method and apparatus, relatively typically such as:
Application number 200720001316.8, notification number CN200991700, name is called the Chinese utility model patent of " changing food waste recycling total system ", disclose a kind for the treatment of system be made up of storage pond, drench pit and water pond, foreign matter go-on-go transmitting device, stirring separation chamber, part device such as fermentation refinement pond and tank for sewage gas, Dou Sheng mechanism, sterilizing, drying, degreasing granulating and finished product packing etc., the startup optimization of whole system is completed by electric control gear and tube fit.This total system is complicated, and cost is high.
Application number 201010224280.6, the Chinese invention patent that name is called " utilizing the integrated conduct method of changing food waste gas composting ", discloses a kind of technological process: comprise the ragging of use vibrations grid, break process, homogeneous process and anaerobic fermentation; The biogas produced by anaerobic fermentation is through methane purifying system process; The digestive juice that anaerobic fermentation produces is carried out Separation of Solid and Liquid, produce natural pond slag and natural pond liquid, wherein natural pond slag is used as fertilizer after ventilating and stacking, and natural pond liquid carries out evaporation and concentration, the concentrate generated can directly use as common fertilizer, or is processed into special fertilizer to use.Prior art does not have good processing scheme to the grease in changing food waste, or has avoided related link; In addition effective control method be there is no to the optimal temperature needed for hydrolysis acidification stage and methane phase stage, or control method is poor, need Exogenous factor and energy consumption is large, 0030 section of patent of invention description as application number 201010224280.6 is mentioned: " its outside hotwater tracing's device that adopts is incubated this anaerobic digestion device ", but do not produce the method for heat, need outsourcing heat energy; And the hydrolysis acidification stage do not separated with the varying environment condition needed for the methane phase stage process, cause organic matter degradation speed slow, factor of created gase is low.
[
utility model content]
The comprehensive food waste treatment system that the technical problems to be solved in the utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of high efficiency low power consuming, effectively can reclaim the resource of reproducible utilization in changing food waste, reduce its taking and polluting environmental resource, obtain good economic and social benefit, make resources circulation obtain good utilization.
The technical scheme that the utility model solve the technical problem employing is:
A comprehensive food waste treatment system for high efficiency low power consuming, comprises Pre-sorting device, processing equipment for pulverizing, anaerobic digestion device, methane purifying device, centrifuge and natural pond Slag treatment device; This total system also comprises oily-water seperating equipment changing food waste slurries being carried out water-oil separating, the hydrolysis acidification device of the acidifying that to be hydrolyzed by the changing food waste slurries through water-oil separating, the biogas oxidation unit and natural pond hydraulic control amount loop back device that biogas are oxidized produce heat; Described Pre-sorting device, processing equipment for pulverizing, oily-water seperating equipment, hydrolysis acidification device, anaerobic digestion device, centrifuge are connected with pipeline successively with natural pond hydraulic control amount loop back device; Described anaerobic digestion device is also connected with biogas oxidation unit and methane purifying device with pipeline respectively; Described centrifuge pipeline is also connected with natural pond Slag treatment device; Described natural pond hydraulic control amount loop back device pipeline is connected with described hydrolysis acidification device, and natural pond liquid is utilized by being transmitted back to described hydrolysis acidification device Inner eycle after described natural pond hydraulic control amount loop back device control amount; Described oily-water seperating equipment is also provided with and controls water-oil separating temperature control equipment temperature required when changing food waste slurries carry out water-oil separating; Described hydrolysis acidification device is also provided with control changing food waste slurries be hydrolyzed acidifying time temperature required reactor for hydrolysis and acidification temperature control equipment; Described anaerobic digestion device is also provided with and controls anaerobic digestion reaction vessel temperature control equipment temperature required when changing food waste slurries carry out anaerobic fermentation.
Described biogas oxidation unit pipeline is connected with the water-oil separating temperature control equipment on described oily-water seperating equipment, makes a part of heat delivery produced during biogas oxidation in described biogas oxidation unit in described water-oil separating temperature control equipment, be used as the energy of this water-oil separating temperature control equipment.
Described biogas oxidation unit pipeline is connected with the reactor for hydrolysis and acidification temperature control equipment on described hydrolysis acidification device, makes a part of heat delivery produced during biogas oxidation in described biogas oxidation unit in described reactor for hydrolysis and acidification temperature control equipment, be used as the energy of this reactor for hydrolysis and acidification temperature control equipment.
Described biogas oxidation unit pipeline is connected with the anaerobic digestion reaction vessel temperature control equipment on described anaerobic digestion device, makes a part of heat delivery produced during biogas oxidation in described biogas oxidation unit in described anaerobic digestion reaction vessel temperature control equipment, be used as the energy of this anaerobic digestion reaction vessel temperature control equipment.
Described natural pond hydraulic control amount loop back device pipeline is also connected with described natural pond Slag treatment device, makes the natural pond liquid precipitate thing of precipitation in described natural pond hydraulic control amount loop back device be transported to described natural pond Slag treatment device composting together with the natural pond slag in this natural pond Slag treatment device.
Compared with the existing technology comparatively, the beneficial effect of the comprehensive food waste treatment system of the utility model high efficiency low power consuming is:
1, whole total system is scientific and reasonable, achieves changing food waste harmless treatment, reclaims clean biogas energy, produces solid organic fertilizer product, achieve thoroughly recycling of resource;
2, whole total system by environmental protection, the energy, agriculture each side science, to be reasonably organicly together in series, carry out the changing food waste comprehensive regulation, achieve the minimizing of changing food waste, energy, resource, innoxious simultaneously; While obtaining economic benefit, social benefit, for recycling economy lays a solid foundation;
3, a part of biogas is used dexterously " coal mine ventilation air methane oxidation device " in technical field of coal mine as biogas oxidation unit of the present utility model to produce heat (hot water or water vapour), this heat (hot water or water vapour) is used as the energy of recycling; The energy that when temperature height changes and makes solid grease become free state grease when this heat (hot water or water vapour) is mainly used in controlling water-oil separating in oily-water seperating equipment, high temperature consumes, with the energy needing for Hydrolysis Acidification in controlled hydrolysis acidizing device to consume when keeping uniform temperature, with for controlling the energy that anaerobic fermentation process in anaerobic digestion device needs to consume when keeping uniform temperature; Both effectively provided the temperature needed for each device of the utility model total system, achieve again the self-produced personal of heat energy, project does not need Exogenous factor, and resources circulation is utilized;
4, in order to enhance anaerobic fermentation degradation process in changing food waste subsequent anaerobic digestion device stability, greatly shorten changing food waste the time of staying and improve the gas production of biogas, the utility model, before the anaerobic digestion device of anaerobic fermentation processing procedure, is provided with the hydrolysis acidification device of the acidifying that to be hydrolyzed especially to changing food waste;
5, in anaerobic fermentation processing procedure, according to the various different conditions of changing food waste, automatically control the temperature environment in anaerobic digestion device, reach anaerobic fermentation effect optimization in anaerobic digestion device;
6, the anaerobic fermentation process in the utility model anaerobic digestion device fast, efficient and stability is strong, and gas producing efficiency improves 20% ~ 40% than prior art, reduces by tens times than the time of natural anaerobic fermentation, and obtain biogas output and increase substantially;
7, the natural pond liquid separated by centrifuge utilizes by being transmitted back to hydrolysis acidification device Inner eycle after natural pond hydraulic control amount loop back device control amount, not only solve the problem that in hydrolysis acidification device, in Hydrolysis Acidification, pH value is stable, also solve the problem that centrifuge carries out natural pond liquid process after Separation of Solid and Liquid;
8, the generating in whole total system, heat supply are obtained for and recycle, and self energy consumption is low, production capacity is high;
9, by the utility model total system, changing food waste is recycled, rubbish meat and trench wet goods potential problem can be stopped.
In sum, the utility model total system can reclaim the resource of reproducible utilization in changing food waste effectively, reduces its taking and polluting environmental resource, obtains good economic and social benefit, makes resources circulation obtain good utilization.
[
accompanying drawing explanation]
Fig. 1 is the block diagram of the comprehensive food waste treatment system of the utility model high efficiency low power consuming, and the arrow in figure represents the flow direction of changing food waste and handled thing thereof;
Process flow diagram when Fig. 2 is described total system process changing food waste.
[detailed description of the invention]
Below in conjunction with each accompanying drawing, the utility model is described in further detail.
See Fig. 1, a kind of comprehensive food waste treatment system of high efficiency low power consuming, comprises Pre-sorting device 10, processing equipment for pulverizing 20, anaerobic digestion device 50, methane purifying device 95, centrifuge 60 and natural pond Slag treatment device 80; This total system also comprises the oily-water seperating equipment 30 changing food waste slurries being carried out water-oil separating, the hydrolysis acidification device 40 of the acidifying that to be hydrolyzed by the changing food waste slurries through water-oil separating, the biogas oxidation unit 90 and natural pond hydraulic control amount loop back device 70 that biogas are oxidized produce heat; Described Pre-sorting device 10, processing equipment for pulverizing 20, oily-water seperating equipment 30, hydrolysis acidification device 40, anaerobic digestion device 50, centrifuge 60 are connected with pipeline successively with natural pond hydraulic control amount loop back device 70; Described anaerobic digestion device 50 is also connected with biogas oxidation unit 90 and methane purifying device 95 with pipeline respectively; Described centrifuge 60 pipeline is also connected with natural pond Slag treatment device 80; Described natural pond hydraulic control amount loop back device 70 is connected with described hydrolysis acidification device 40 with pipeline, and natural pond liquid is utilized by being transmitted back to described hydrolysis acidification device 40 Inner eycle after described natural pond hydraulic control amount loop back device 70 control amount; Described oily-water seperating equipment 30 is also provided with and controls water-oil separating temperature control equipment temperature required when changing food waste slurries carry out water-oil separating; Described hydrolysis acidification device 40 is also provided with control changing food waste slurries be hydrolyzed acidifying time temperature required reactor for hydrolysis and acidification temperature control equipment; Described anaerobic digestion device 50 is also provided with and controls anaerobic digestion reaction vessel temperature control equipment temperature required when changing food waste slurries carry out anaerobic fermentation.Biogas oxidation unit 90 will produce the heat such as hot water or water vapour in biogas oxidizing process.
" water-oil separating temperature control equipment " of the present utility model, " reactor for hydrolysis and acidification temperature control equipment " and " anaerobic digestion reaction vessel temperature control equipment " reality are exactly " temperature control equipment ", mainly in order to distinguish, and temperature controlled scope in each device is different, just by three different titles.And " temperature control equipment " is prior art, it is very ripe a kind of technology, such as " water-oil separating temperature control equipment " of the present utility model, the concrete structure of " reactor for hydrolysis and acidification temperature control equipment " and " anaerobic digestion reaction vessel temperature control equipment " can be " 201320193909.4 " see application number, the applying date is on April 17th, 2013, Authorization Notice No. is " CN 203163284 U ", authorized announcement date is on August 28th, 2013, name is called the utility model patent of " the Warm water circulation device for middle constant-temperatureanaerobic anaerobic is reacted ", fermentation vat only in this utility model patent changes the reactor of oily-water seperating equipment 30 of the present utility model respectively accordingly into, the reactor of hydrolysis acidification device 40 and the reactor of anaerobic digestion device 50.If also have the utility model to be transported to described " water-oil separating temperature control equipment " by a part of heat (hot water or water vapour) produced during biogas oxidation in described biogas oxidation unit 90, " reactor for hydrolysis and acidification temperature control equipment " and " anaerobic digestion reaction vessel temperature control equipment " is used as the energy source of respectively this temperature control equipment, can be then heat-generating units in the utility model patent of " 201320193909.4 " and storage tank without application number, because a part of heat (hot water or water vapour) produced when hot water is now oxidized by biogas in biogas oxidation unit 90 described in the utility model is directly supplied by each heat exchanging pipe, closed loop heat exchanging pipe can be adopted continuously to supply, each heat exchanging pipe is provided with each valve switch automatically controlled by control unit respectively simultaneously, if sensor finds that temperature is lower than setting value, the flow (increasing the flow of every water clock hot water) that then control unit controls hot water by controlling corresponding valve switch makes temperature rise and reach setting value, if sensor finds that temperature is higher than setting value, then the flow (reducing the flow of every water clock hot water) that control unit controls hot water by controlling corresponding valve switch makes temperature decline and reach setting value.
See Fig. 1 and Fig. 2, described Pre-sorting device 10 is exactly the device used in the Pre-sorting process flow steps of Fig. 2; This Pre-sorting device 10 comprises wet type pre-selecting system and Magnetic Metal piece-rate system; Pending changing food waste is carried out the changing food waste that Pre-sorting obtains organic matter class and non-organic thing class by this Pre-sorting device 10, and the changing food waste of non-organic thing class comprises plastics, metal, glass and/or lighter.The changing food waste of organic matter class comprises rubbish from cooking and/or the fruits and vegetables rubbish of catering trade.After pending changing food waste being carried out Pre-sorting by Pre-sorting device 10, form being separated of organic matter and non-organic thing, wherein the plastics of non-organic thing class and/or metal recovery utilize, and by the changing food waste of remaining non-organic thing class outward transport landfill.
See Fig. 1 and Fig. 2, described processing equipment for pulverizing 20 is exactly the device used in the break process process flow steps of Fig. 2; Organic matter class changing food waste after Pre-sorting device 10 Pre-sorting is used Mechanical Crushing mode by processing equipment for pulverizing 20 again, is broken into changing food waste slurries.Granulated garbage size after fragmentation is at 1 cm.
Above-mentioned Pre-sorting device 10 and the device of processing equipment for pulverizing 20 for using in pre-treatment step, this Pre-sorting device 10 and processing equipment for pulverizing 20 ensure that changing food waste subsequent treatment and anaerobic fermentation can be stablized and efficiently carry out.The component of changing food waste is more complicated, except biodegradable material, also comprising a lot of non-organic thing class can not degradation material, as metal, plastics, pottery, glass and lighter etc., if these non-organic thing class materials enter in follow-up anaerobic fermentation and fertilizer, the efficiency of anaerobic fermentation and the quality of fertilizer greatly certainly will be reduced; If the adverse consequences such as these non-organic thing class materials enter in anaerobic digestion device the pipeline that easily results in blockage, affect energy and material Transfer, the dischargeable capacity of reduction reactor, finally cause anaerobic digestion efficiency low, even cause anaerobic reaction failure; In addition, in high solid concentration anaerobic fermentation process, its hydrolysis stage is the rate-limiting step in anaerobic reaction series, and anaerobism material degree of crushing is higher, and not only its hydrolysis rate is faster, and effectively can prevent the accumulation of acid and greatly improve the efficiency of whole anaerobic reaction.
See Fig. 1 and Fig. 2, described oily-water seperating equipment 30 is exactly the device used in the water-oil separating process flow steps of Fig. 2; Changing food waste slurries after the process of processing equipment for pulverizing 20 break process are carried out water-oil separating by this oily-water seperating equipment 30; Specially also be provided with in oily-water seperating equipment 30 and control water-oil separating temperature control equipment temperature required when changing food waste slurries carry out water-oil separating, this water-oil separating temperature control equipment can be arranged on the outer wall of the reactor of oily-water seperating equipment 30; The a part of heat (hot water or water vapour) produced during biogas oxidation in described biogas oxidation unit 90 can be transported to the energy source being used as this water-oil separating temperature control equipment in described water-oil separating temperature control equipment.Grease in changing food waste slurries with free state and solid-state existence; Free state grease in changing food waste slurries is directly adopted to the mode of water-oil separating, different from the density of grease according to water, utilize the height of temperature to change, realize grease from the separation water; For the method that the solid grease in changing food waste slurries first adopts high temperature to separate out, make solid-state grease become the grease of free state, then adopt the mode of water-oil separating to be separated; The grease separated is sold as the raw material of industry or is produced the product with economic worth, as biodiesel etc.
It is very slow that fatty character due to grease in changing food waste determines follow-up anaerobic fermentation degradation process, and easily in reactor, form the larger suspension of viscosity with other material, affect the normal operation of equipment, therefore, the utility model is specially provided with oily-water seperating equipment 30 and carries out this processing step of water-oil separating to changing food waste slurries, and grease is carried out the link that recycles.
See Fig. 1 and Fig. 2, described hydrolysis acidification device 40 is exactly the device used in the hydrolysis acidification process flow steps of Fig. 2.Efficient hydrolysis acidification fully needs two conditions: the temperature of Hydrolysis Acidification controls to be 30 DEG C ~ 35 DEG C, and the pH value of Hydrolysis Acidification controls 5.2 ~ 6.3, and the utility model is createed by following apparatus design and controls to reach this two conditions.
Described hydrolysis acidification device 40 is specially provided with control changing food waste slurries be hydrolyzed acidifying time temperature required reactor for hydrolysis and acidification temperature control equipment, this reactor for hydrolysis and acidification temperature control equipment can be arranged on the outer wall of the reactor of hydrolysis acidification device 40.The a part of heat (hot water or water vapour) produced during biogas oxidation in described biogas oxidation unit 90 can be transported to the energy source being used as this reactor for hydrolysis and acidification temperature control equipment in described reactor for hydrolysis and acidification temperature control equipment.Changing food waste slurries through oily-water seperating equipment 30 water-oil separating are transported in hydrolysis acidification device 40 acidifying that is hydrolyzed, create in described changing food waste slurries Hydrolysis Acidification and control optimum hydrolysis acidification bacterium and play active temperature environment conditions, namely the temperature of Hydrolysis Acidification controls to be 30 DEG C ~ 35 DEG C.
Hydrolysis acidification is the beginning of whole organic matter class changing food waste anaerobic degradation, under the effect of water and hydrolysis acidification bacterium, organic matter is untied by from large molecular water in the reactor of hydrolysis acidification device 40, changes the organic acid of small molecular gradually into, simultaneously with discharging portion gas.Organic acid mainly acetic acid, propionic acid and the butyric acid etc. that the hydrolysis acidification stage produces.It is very fast that Hydrolysis Acidification carries out, if do not add control very easily form peracidity environment, that is pH value can reduce fast.Although the acid resistance of hydrolysis acidification bacterium is fine, when the pH value in its environment is too low, the activity of hydrolysis acidification bacterium still can be suppressed, degradation effect is caused to reduce, therefore in Hydrolysis Acidification, hydrolysis acidification bacterium is the more stable weak acid environments of needs one in fact, specially devise natural pond hydraulic control amount loop back device 70 to this utility model the natural pond liquid separated through centrifuge 60 (pH value of natural pond liquid is about 8) is transmitted back in hydrolysis acidification device 40 Inner eycle and utilizes, just solve the stable problem of pH value in Hydrolysis Acidification in time.Create and control optimum hydrolysis acidification bacterium and play active pH value condition, namely the pH value of Hydrolysis Acidification controls between 5.2 ~ 6.3.
The major microorganisms of hydrolysis acidification stage effect is hydrolysis bacterium and acidifying bacterium, and both are amphimicrobe, and microorganism classification belongs to enteron aisle Cordycepps and spore-producing bacterium, feature is that reproduction speed is fast, metabolism degree is high, and monomer volume is little, can fast and surrounding environment carry out material handing-over; Hydrolysis and produce that acid carries out very fast, be difficult to them to separate, therefore be referred to as the hydrolysis acidification stage, its microorganism played a major role is referred to as hydrolysis acidification bacterium, and the utility model hydrolysis acidification bacterium used is prior art, comprises hydrogen-producing acetogens etc.
The solid content controlling changing food waste slurries during hydrolysis acidification is 10% ~ 15%.
The each charging of each described hydrolysis acidification device 40 is 7% ~ 10% of the reactor volume of described hydrolysis acidification device 40, and in described hydrolysis acidification device 40, the time of staying is 10 ~ 15 days.The number of times of each described hydrolysis acidification device 40 charging every day decides according to needing the size for the treatment of capacity every day, such as general each described hydrolysis acidification device 40 charging every day 1 ~ 8 time.Such as a kind of solid content is that 12% changing food waste slurries are hydrolyzed acidifying in hydrolysis acidification device 40, each hydrolysis acidification device 40 charging every day 1 time, each charging is 8% of the reactor volume of hydrolysis acidification device 40, the time of staying is 13 days, the temperature of Hydrolysis Acidification controls to be 33 DEG C, and the pH value of Hydrolysis Acidification controls 5.8.
Changing food waste slurries of the present utility model, after hydrolysis acidification, enhance the stability of the follow-up anaerobic fermentation degradation process of changing food waste slurries, greatly shorten the time of staying of changing food waste slurries, improve the gas production of biogas simultaneously.
See Fig. 1 and Fig. 2, described anaerobic digestion device 50 is exactly the device used in the anaerobic ferment process process step of Fig. 2; Described anaerobic digestion device 50 is specially also provided with and controls anaerobic digestion reaction vessel temperature control equipment temperature required when changing food waste slurries carry out anaerobic fermentation, this anaerobic digestion reaction vessel temperature control equipment can be arranged on the outer wall of the reactor of anaerobic digestion device 50.The a part of heat (hot water or water vapour) produced during biogas oxidation in described biogas oxidation unit 90 can be transported to the energy source being used as this anaerobic digestion reaction vessel temperature control equipment in described anaerobic digestion reaction vessel temperature control equipment.Carry out anaerobic fermentation by being delivered in anaerobic digestion device 50 through the changing food waste slurries of hydrolysis acidification device 40 hydrolysis acidification, the temperature of anaerobic fermentation process controls to be 55 DEG C ~ 60 DEG C; Described changing food waste slurries obtain biogas and digestive juice after anaerobic fermentation.The pH value general control of anaerobic fermentation process is 6.8 ~ 7.5.The each charging of each described anaerobic digestion device 50 is 7% ~ 10% of the reactor volume of described anaerobic digestion device 50, and in described anaerobic digestion device 50, the time of staying is 10 ~ 15 days.The number of times of each described anaerobic digestion device 50 charging every day decides according to needing the size for the treatment of capacity every day, such as general each described anaerobic digestion device 50 charging every day 1 ~ 8 time.Such as a kind of solid content is that 12% changing food waste slurries are transported in anaerobic digestion device 50 and carry out anaerobic fermentation, each anaerobic digestion device 50 charging every day 1 time, each charging is 8% of the reactor volume of anaerobic digestion device 50, the time of staying is 13 days, the temperature of anaerobic fermentation process controls to be 57 DEG C, and the pH value of anaerobic fermentation process controls 7.1.
In the process of described anaerobic fermentation, also need each parameter of monitoring at any time in anaerobic fermentation process, comprise temperature, pH value, carbon-nitrogen ratio, trace element, biogas output and methane content of bilogas, and detect data point reuse anaerobic fermentation controlled condition to reach the digestive efficiency of stability and high efficiency according to these, namely according to the various different conditions of changing food waste slurries, automatically control the anaerobic environment in this anaerobic digestion device 50, make anaerobic fermentation effect optimization.
The anaerobic bacteria that the utility model anaerobic fermentation process produces methane is prior art, comprises thermophilic methagen and/or Soxhlet methanothrix sp.
The Hydrolysis Acidification of the utility model changing food waste has hydrolysis acidification mushroom to participate in, the environmental condition that anaerobic bacteria when hydrolysis acidification bacterium due to hydrolysis acidification plays the environmental condition of optimum activity and anaerobic fermentation plays optimum activity has bigger difference, therefore for realizing best degradation effect, the process of the process of hydrolysis acidification and anaerobic fermentation is specially independently placed in hydrolysis acidification device 40 and anaerobic digestion device 50 by the utility model application carries out, be divided into two-phase sweat, acidifying in the reactor avoiding occurring that other single-phase technique easily occurs, cause the rough sledding that whole anaerobic degradation process is suppressed, ensure the stability of anaerobic fermentation process to greatest extent, also improve aerogenesis effect simultaneously, additional income.
Carry out in the reactor that the two-phase sweat of hydrolysis acidification and anaerobic fermentation is arranged on two independently devices, each reactor wall is provided with each heat exchanging pipe that supplying hot water or water vapour are circulated through.Methane phase stage of hydrolysis acidification stage and anaerobic fermentation is placed on these two respectively and independently carries out in reactor, independently reactor assembly can meet the optimum growing environment condition of different mushroom simultaneously, the biogas oxidation heat production and the temperature back control system that make full use of biogas oxidation unit 90 below the utility model application effectively can realize these two reactors and obtain optimum environment temperature respectively, enhance the stability of whole degradation process, greatly shorten the time of staying of changing food waste, improve the gas production of biogas simultaneously.Wherein hydrolysis acidification phase temperature controls: middle temperature 30 DEG C ~ 35 DEG C, and the methane phase phase temperature of anaerobic fermentation controls: high temperature 55 DEG C ~ 60 DEG C.The utility model can shorten the time of staying of changing food waste greatly, raises the efficiency, and also improves the gas production of biogas simultaneously, and gas producing efficiency of the present utility model improves about 20% ~ 40% than prior art.
The reactor of hydrolysis acidification device 40 of the present utility model and the reactor of anaerobic digestion device 50 can adopt application number to be " 201320193956.9 ", the applying date is on April 17th, 2013, Authorization Notice No. is " CN 203159606 U ", authorized announcement date is on August 28th, 2013, name is called the structure described in utility model patent of " constant-temperatureanaerobic anaerobic treatment pond ", also can adopt the structure of the reactor of other prior art anaerobic digestion device, not repeat them here.
See Fig. 1 and Fig. 2, described biogas oxidation unit 90 is exactly the device used in the biogas oxidation heat production process flow steps of Fig. 2; Changing food waste slurries are transported to biogas oxidation unit 90 to produce heat (hot water or water vapour) through a part of biogas that anaerobic digestion device 50 anaerobic fermentation produces, this heat (hot water or water vapour) is used as the energy of recycling, and heat (hot water or the water vapour) part that this biogas oxidation unit 90 produces needs in other each device of energy for the utility model total system for the oxidation reaction and another part maintaining biogas oxidation unit 90 own.In the utility model total system, the energy that when temperature height changes and makes solid grease become free state grease when heat (hot water or water vapour) another part that this biogas oxidation unit 90 produces is for controlling water-oil separating in oily-water seperating equipment 30, high temperature consumes, with the energy needing for Hydrolysis Acidification in controlled hydrolysis acidizing device 40 to consume when keeping uniform temperature, and for controlling the energy that anaerobic fermentation process in anaerobic digestion device 50 needs to consume when keeping uniform temperature.
Described biogas oxidation unit 90 comprises reverse-flow fixing oxidation bed and control system, and its operation principle is: the environment first creating biogas oxidation reaction, general temperature higher than 800 degrees Celsius, if temperature is 1000 degrees Celsius; Then the biogas produced is introduced oxidation bed, produce heat (hot water or water vapour) after oxidation reaction, wherein a part for heat (hot water or water vapour) is for maintaining oxidation reaction and another part needs in other each device of energy for the utility model total system.
The concrete structure of biogas oxidation unit 90 of the present utility model can be " 200620081956.X " see application number in technical field of coal mine, the applying date is on March 14th, 2006, Authorization Notice No. is " CN 2905204 Y ", authorized announcement date is on May 30th, 2007, the utility model patent that name is called " coal mine ventilation air methane oxidation device "; Only the raw material be somebody's turn to do in the utility model patent of " coal mine ventilation air methane oxidation device " is " weary wind ", and the raw material of biogas oxidation unit 90 of the present utility model is " biogas ", therefore only " coal mine methane " and/or " weary wind " that be somebody's turn to do in " coal mine ventilation air methane oxidation device " utility model patent all need be replaced to " biogas " of the present utility model just passable; And the utility model to recycle the content of methane in the content ratio " coal mine methane " of the methane in changing food waste " biogas " that produces high a lot, heat production effect is better.
Heat (hot water or water vapour) another part that described biogas oxidation unit 90 produces will by temperature back control system, as water-oil separating temperature control equipment, reactor for hydrolysis and acidification temperature control equipment and anaerobic digestion reaction vessel temperature control equipment etc. provide the temperature needed for each operation stage, by temp probe thermometric (or adopting sensor thermometric), closed-loop control heat-exchanger pump amount realizes, the heat energy realizing the generation of the utility model total system is self-produced personal, do not need Exogenous factor, reduce the consumption to traditional fossil fuel.
See Fig. 1 and Fig. 2, described methane purifying device 95 is exactly the device used in the marsh gas purifying process flow steps of Fig. 2; Another part biogas that changing food waste slurries produce through anaerobic digestion device 50 anaerobic fermentation is transported to purified treatment in methane purifying device 95, and what make it meet Biogas Generator Set or pipeline network of fuel gas in city uses gas requirement, provides the green clean energy.
As described in biogas through the preliminary treatment of desulfurizing tower, remove the H in this biogas
2s impurity, the described biogas after preliminary treatment is again after the cooling of the equipment such as condensation, cyclonic separation and dust removal filter, dehydration and purified treatment, and what make it meet Biogas Generator Set and pipeline network of fuel gas in city uses gas requirement.
See Fig. 1 and Fig. 2, described centrifuge 60 is exactly the equipment used in the solid-liquid separation process process step of Fig. 2; The digestive juice that changing food waste slurries produce through anaerobic digestion device 50 anaerobic fermentation is pumped into centrifuge 60, solid matter and liquid substance are separated, produce natural pond slag and natural pond liquid.
See Fig. 1 and Fig. 2, described natural pond Slag treatment device 80 is exactly the equipment used in the natural pond slag fertilize preparation craft process step of Fig. 2; Changing food waste slurries are transported to natural pond Slag treatment device 80 stacking of ventilating through the natural pond slag that centrifuge 60 is separated makes its water content be down to 60% and following, then the aerobic compost carried out 5 ~ 7 days can be met the composting production of " the agricultural control criterion of townm refuse " (GB8172-1987), as fertilizer, multiple fields such as agricultural, forestry, fruit and vegetable plant husbandry, municipal gardens, prone soil improvement, the rear recovery of heavy-metal contaminated soil improvement can be widely used in.
See Fig. 1 and Fig. 2, described natural pond hydraulic control amount loop back device 70 is exactly the equipment used in the natural pond liquid loopback process flow steps of Fig. 2; Changing food waste slurries are transported to natural pond hydraulic control amount loop back device 70 through the natural pond liquid that centrifuge 60 is separated, this natural pond hydraulic control amount loop back device 70 utilizes being transmitted back to described hydrolysis acidification device 40 Inner eycle after natural pond hydraulic control amount, not only solve the problem that in described hydrolysis acidification device 40, in Hydrolysis Acidification, pH value is stable, also solve the problem of natural pond liquid process after centrifuge 60 Separation of Solid and Liquid, achieve material recycle in field and utilize.The anaerobic bacteria simultaneously using recirculation water also can supplement in part nutriment and rare metal supply anaerobic digestion device 50 in anaerobic fermentation process uses, and the activity decrease avoiding mushroom to cause because of nutritional deficiency is even dead.
Described biogas oxidation unit 90 pipeline is connected with the water-oil separating temperature control equipment on described oily-water seperating equipment 30, makes a part of heat (hot water or water vapour) produced during biogas oxidation in described biogas oxidation unit 90 be transported to the energy being used as this water-oil separating temperature control equipment in described water-oil separating temperature control equipment.The heat (hot water or water vapour) that high temperature when that is adopting the height of temperature during water-oil separating to change in oily-water seperating equipment 30 and make solid grease become free state grease produces when being oxidized heat production by the biogas in the utility model biogas oxidation unit 90 provides, so just achieve the self-produced personal of heat energy, do not need Exogenous factor, resources circulation is fully used.
Described biogas oxidation unit 90 pipeline is connected with the reactor for hydrolysis and acidification temperature control equipment on described hydrolysis acidification device 40, makes a part of heat (hot water or water vapour) produced during biogas oxidation in described biogas oxidation unit 90 be transported to the energy being used as this reactor for hydrolysis and acidification temperature control equipment in described reactor for hydrolysis and acidification temperature control equipment.The heat (hot water or water vapour) that temperature namely in hydrolysis acidification device 40 during Hydrolysis Acidification controls to produce when being oxidized heat production by the biogas in the utility model biogas oxidation unit 90 provides, also achieve the self-produced personal of heat energy like this, do not need Exogenous factor, resources circulation is fully used.
Described biogas oxidation unit 90 pipeline is connected with the anaerobic digestion reaction vessel temperature control equipment on described anaerobic digestion device 50, makes a part of heat (hot water or water vapour) produced during biogas oxidation in described biogas oxidation unit 90 be transported to the energy being used as this anaerobic digestion reaction vessel temperature control equipment in described anaerobic digestion reaction vessel temperature control equipment.The heat (hot water or water vapour) that temperature namely in anaerobic digestion device 50 during anaerobic fermentation process controls to produce when being oxidized heat production by the biogas in the utility model biogas oxidation unit 90 provides, also achieve the self-produced personal of heat energy like this, do not need Exogenous factor, resources circulation is fully used.
Described natural pond hydraulic control amount loop back device 70 pipeline is also connected with described natural pond Slag treatment device 80, makes the natural pond liquid precipitate thing of precipitation in described natural pond hydraulic control amount loop back device 70 be transported to described natural pond Slag treatment device 80 composting together with the natural pond slag in this natural pond Slag treatment device 80.
In the period that current China is becoming tight energy supply day, seek new forms of energy extremely urgent, the utility model, by appropriate comprehensive food waste treatment system, discharges the energy contained in changing food waste, make it be converted into electric energy and heat energy, be used as effectively supplementing of conventional energy resource.
The above embodiment only have expressed preferred embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims; It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model; Therefore, all equivalents of doing with the utility model right and modification, all should belong to the covering scope of the utility model claim.
Claims (5)
1. a comprehensive food waste treatment system for high efficiency low power consuming, comprises Pre-sorting device (10), processing equipment for pulverizing (20), anaerobic digestion device (50), methane purifying device (95), centrifuge (60) and natural pond Slag treatment device (80); It is characterized in that:
Also comprise the oily-water seperating equipment (30) changing food waste slurries being carried out water-oil separating, the hydrolysis acidification device (40) of the acidifying that to be hydrolyzed by the changing food waste slurries through water-oil separating, the biogas oxidation unit (90) and natural pond hydraulic control amount loop back device (70) that biogas are oxidized produce heat; Described Pre-sorting device (10), processing equipment for pulverizing (20), oily-water seperating equipment (30), hydrolysis acidification device (40), anaerobic digestion device (50), centrifuge (60) are connected with pipeline successively with natural pond hydraulic control amount loop back device (70); Described anaerobic digestion device (50) is also connected with biogas oxidation unit (90) and methane purifying device (95) with pipeline respectively; Described centrifuge (60) pipeline is also connected with natural pond Slag treatment device (80); Described natural pond hydraulic control amount loop back device (70) is connected with described hydrolysis acidification device (40) with pipeline, and natural pond liquid is utilized by being transmitted back to described hydrolysis acidification device (40) Inner eycle after described natural pond hydraulic control amount loop back device (70) control amount; Described oily-water seperating equipment (30) is also provided with and controls water-oil separating temperature control equipment temperature required when changing food waste slurries carry out water-oil separating; Described hydrolysis acidification device (40) is also provided with control changing food waste slurries be hydrolyzed acidifying time temperature required reactor for hydrolysis and acidification temperature control equipment; Described anaerobic digestion device (50) is also provided with and controls anaerobic digestion reaction vessel temperature control equipment temperature required when changing food waste slurries carry out anaerobic fermentation.
2. the comprehensive food waste treatment system of high efficiency low power consuming according to claim 1, is characterized in that:
Described biogas oxidation unit (90) is connected with the water-oil separating temperature control equipment on described oily-water seperating equipment (30) with pipeline, and a part of heat delivery produced when the interior biogas of described biogas oxidation unit (90) is oxidized is used as the energy of this water-oil separating temperature control equipment in described water-oil separating temperature control equipment.
3. the comprehensive food waste treatment system of high efficiency low power consuming according to claim 1, is characterized in that:
Described biogas oxidation unit (90) is connected with the reactor for hydrolysis and acidification temperature control equipment on described hydrolysis acidification device (40) with pipeline, and a part of heat delivery produced when the interior biogas of described biogas oxidation unit (90) is oxidized is used as the energy of this reactor for hydrolysis and acidification temperature control equipment in described reactor for hydrolysis and acidification temperature control equipment.
4. the comprehensive food waste treatment system of high efficiency low power consuming according to claim 1, is characterized in that:
Described biogas oxidation unit (90) is connected with the anaerobic digestion reaction vessel temperature control equipment on described anaerobic digestion device (50) with pipeline, and a part of heat delivery produced when the interior biogas of described biogas oxidation unit (90) is oxidized is used as the energy of this anaerobic digestion reaction vessel temperature control equipment in described anaerobic digestion reaction vessel temperature control equipment.
5. the comprehensive food waste treatment system of the high efficiency low power consuming according to any one of Claims 1-4, is characterized in that:
Described natural pond hydraulic control amount loop back device (70) is also connected with described natural pond Slag treatment device (80) with pipeline, makes the natural pond liquid precipitate thing of precipitation in described natural pond hydraulic control amount loop back device (70) be transported to described natural pond Slag treatment device (80) composting together with the natural pond slag in this natural pond Slag treatment device (80).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889144A (en) * | 2015-06-09 | 2015-09-09 | 上海康捷保新材料股份有限公司 | Treatment equipment for kitchen waste |
| CN106363007A (en) * | 2016-08-26 | 2017-02-01 | 浙江省再生资源集团有限公司 | Kitchen waste bio-chemical treatment machine |
| CN114871256A (en) * | 2022-04-08 | 2022-08-09 | 肖扬帆 | Kitchen waste oil extraction treatment process method and system |
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2014
- 2014-11-18 CN CN201420688823.3U patent/CN204220605U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889144A (en) * | 2015-06-09 | 2015-09-09 | 上海康捷保新材料股份有限公司 | Treatment equipment for kitchen waste |
| CN106363007A (en) * | 2016-08-26 | 2017-02-01 | 浙江省再生资源集团有限公司 | Kitchen waste bio-chemical treatment machine |
| CN114871256A (en) * | 2022-04-08 | 2022-08-09 | 肖扬帆 | Kitchen waste oil extraction treatment process method and system |
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Granted publication date: 20150325 Termination date: 20191118 |