CN114477685A - Self-heating circulation multi-tank nested anaerobic fermentation device - Google Patents
Self-heating circulation multi-tank nested anaerobic fermentation device Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a self-heating circulation multi-tank nested anaerobic fermentation device, which comprises a feeding tank, a preheating tank, a fermentation tank and a discharging tank which are sequentially nested from inside to outside, wherein materials enter from a feeding mechanism at the top of the feeding tank and enter the preheating tank through an outlet of the feeding tank at the bottom of the feeding tank, an outlet of the preheating tank is arranged on one side of the upper wall of the preheating tank, a heater for providing heat for the preheating tank is arranged in the fermentation tank, an outlet of the fermentation tank in the direction opposite to that of the outlet of the preheating tank is arranged on the upper wall of the fermentation tank, an outlet of the discharging tank is arranged on one side of the upper wall of the discharging tank, which is far away from the outlet of the fermentation tank, biogas overflow outlets at the tops of the fermentation tank and the discharging tank are communicated with a biogas prestoring tank through a biogas pipeline, a biogas conveying port connected with one end of a combustion heating mechanism is arranged on the biogas prestoring tank, and the other end of the combustion heating mechanism is connected with the heater. The invention adopts an integrated design, has compact structure, is convenient for equipment transportation, has good sealing effect of the integrated device, can realize self-heating circulation and improve the fermentation rate.
Description
Technical Field
The invention relates to the technical field of biological anaerobic fermentation, in particular to a self-heating circulation multi-tank nested anaerobic fermentation device.
Background
Livestock excrement pollutes water and soil and peripheral air, excrement of urban residents, kitchen waste and rotten organic matters such as melons and fruits enter a water source, the organic matters and organic fertilizers generated by the excrement are precipitated, rotten and fermented, blue algae are generated, and the blue algae are generated after being died and are continuously vicious circulated, so that the water quality of an inland river is influenced and changed into black and odorous water. The waste gas produced by people and livestock and the harmful gas produced by a large amount of organic matters not only pollute the air, but also pollute the water source, the explosion of green tides and the generation of huge organic matters are realized, so that the huge gas is continuously generated after circulation, actually, the methane is the methane, the methane is mainly methane, the methane is also greenhouse gas, the methane has serious influence on the climate than carbon dioxide, and the large amount of gas is suspended in the atmosphere and meets the change of proper weather, so that the haze is formed. Livestock manure and flushing water in a farm are main agricultural pollution sources, and according to authoritative data, the yield of the livestock manure in China exceeds 41 hundred million tons, and the nitrogen and phosphorus content in wastewater manure water is higher in 2020, which is equivalent to 0.5 time of the content of chemical fertilizer. The anaerobic fermentation degradation of organic matters can recover energy, and meets the requirement of environmental sustainable development. The fermentation speed of the liquid obtained by the solid-liquid separation of the livestock manure and most of washing water is much shorter than that of solid-phase manure, and the fermentation time is much shorter. The anaerobic fermentation targets are divided into two types, one is to realize zero environmental pollution, and the other is to aim at the methane yield. The treatment method of decomposing most degradable organic substances in the livestock manure and garbage by using the conversion action of anaerobic microorganisms and converting the degradable organic substances into methane is a popular method at present. Anaerobic fermentation is a mature garbage energy technology, the garbage is converted into methane, the methane is convenient to transport and store, the heat value is high, the combustion pollution is small, the application is wide, and the method is the most effective way for improving the environment by recycling the livestock excrement and the biomass.
The liquefaction stage mainly acts by zymocyte, including cellulolytic bacteria and protein hydrolytic bacteria, the acidogenesis stage mainly acts by acetic acid bacteria, and the methanogenesis stage mainly acts by methane bacteria, which degrade the products generated in the acidogenesis stage into methane and CO2Simultaneously utilizes hydrogen generated in the acid production stage to convert CO into CO2Reducing to methane. The microorganism anaerobic fermentation device takes livestock and poultry manure, plant straws, household garbage and the like as raw materials, and carries out anaerobic fermentation through the biochemical action of microorganisms, so that the anaerobic fermentation device is converted into microorganism energy and microorganisms required by production and life of peopleA strict sealing device for feed and microbial fertilizer is a novel facility for realizing the ecologization of livestock and poultry farms and households in the breeding places, and is a key chain for virtuous cycle of biological resources. The marketization application of the feed additive has great significance for improving the feeding environment of farms and households, strengthening the epidemic prevention of livestock and poultry, reducing the feeding cost and improving the feeding benefit.
Factors influencing anaerobic fermentation are: the raw material proportion is that the carbon nitrogen ratio of anaerobic fermentation is preferably 20-30, and the yield is obviously reduced when the carbon nitrogen ratio is 35; the temperature is preferably 35-40 ℃; the pH is absolutely necessary for the methane bacteria to maintain a weak alkaline environment, its optimum pH range is 6.8-7.5, the pH is low, it makes CO2Greatly increasing a large amount of water-soluble organic matters and H2S, inhibiting the growth of methane bacteria due to the increase of sulfide content, adjusting pH by adding lime, but adjusting pH is best by adjusting the carbon-nitrogen ratio of raw materials because the alkalinity used for neutralizing acid in the matrix is mainly ammonia nitrogen, the higher the nitrogen content of the matrix, the higher the alkalinity, when VFA (volatile fatty acid)>3000 hours, the microbial anaerobic fermentation device requires the whole device to be sealed and watertight and airtight, and most of the current device buildings adopt building materials such as concrete, bricks, stones and the like, and have a considerable number of capillary channels, so a sealing layer is required to cover a structural layer to ensure the performance and the use requirements. For a closed device such as a microbial anaerobic fermentation device, in order to achieve the purposes of strict, firm, safe, water-tight, gas-tight and good operation of the structure, besides accurate design and elaborate proportioning, delicate construction is an important part. Therefore, it is very important to implement an anaerobic fermentation facility in an equipment form, and the quality of the anaerobic fermentation facility in an equipment form can be ensured, and the gas leakage situation is basically prevented.
At present, anaerobic fermentation equipment mainly comprises three main types: firstly, a full mixing type anaerobic fermentation reactor; a second step of anaerobic folded plate reactor; ③ a plug flow reactor. While the anaerobic fermentation equipment usually adopts stirring, heating and heat preservation, and the material substrate of the full-mixing anaerobic fermentation usually stays in the fermentation reaction device for a longer time, so the equipment is very large, and the monomer reactor can be generally 1000m3～4000m3Its advantages are low load and high impact of feeding material to systemSmall size, stable operation, convenient management, suitability for treating the breeding wastewater with high suspended solids and unsuitability for treating low-concentration raw materials. The treatment of livestock and poultry breeding excrement and wastewater becomes a bottleneck restricting the development of the breeding industry, and the anaerobic digestion to produce biogas is a technical means for waste treatment and environmental protection. According to different characteristics of livestock and poultry manure and waste water, a full-mixing type process can be adopted in a targeted mode to maximize energy recovery, an anaerobic folded plate reactor and a plug flow type reactor for rapid waste water fermentation can be realized, fermentation liquor is prepared for long-term storage, and the cost of biogas engineering is reduced.
Disclosure of Invention
Aiming at the problems, the invention provides the self-heating circulation multi-tank nested anaerobic fermentation device which has compact structure and strong sealing property, realizes self-heating circulation, shortens fermentation time and improves fermentation rate.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a self-heating circulation multiscan nested anaerobic fermentation device, includes the income material jar, preheating tank, fermentation cylinder and the discharge tank that cup joint in proper order from inside to outside, and the material gets into from the feed mechanism at income material tank top to the pan feeding jar export through pan feeding tank bottom gets into the preheating tank, preheating tank upper wall one side is equipped with the preheating tank export, install the heater in the fermentation tank, the fermentation tank upper wall is equipped with the fermentation cylinder export opposite with preheating tank export direction, one side that the fermentation cylinder export was kept away from to the discharge tank upper wall is equipped with the discharge tank export, the marsh gas overflow outlet at fermentation tank and discharge tank top all prestores the jar through biogas pipeline intercommunication, be equipped with the marsh gas transport mouth of connecting burning heating mechanism one end on the marsh gas prestores jar, the burning heating mechanism other end is connected in the heater.
Preferably, a biogas conveying port of the biogas prestoring tank is respectively connected with the biogas storage tank and the combustion heating mechanism through a first biogas pipe and a second biogas pipe which are connected in parallel, the first biogas pipe is provided with a third valve for controlling biogas of the biogas prestoring tank to flow out, the second biogas pipe is provided with a fourth valve for controlling biogas to flow into the combustion heating mechanism, and a first circulating pump is arranged between the combustion heating mechanism and a heater inlet of the heater.
As preferred, the bottom of going into material jar, preheating tank, fermentation cylinder and ejection of compact jar all is equipped with the settler, each the settler all communicates in the back flow through circulating line, and all is equipped with first valve on each circulating line, be equipped with liquid sampling valve on the back flow, the back flow passes through second circulating pump and second valve and even lets in the material jar entry.
Preferably, one side of each settler is provided with a slag outlet, and the slag outlet is provided with a flange.
Preferably, the feeding mechanism comprises a feeder and a balance shaft connected with the feeder, a closed door is arranged on the balance shaft, one end of the closed door is inserted into the feeder and used for preventing the feeder from feeding, a balance block is arranged at the bottom of the other end of the closed door, which uses the balance shaft as a dividing point, and the mass of the balance block is greater than that of the closed door.
Preferably, a screw extruder is connected in the feeder, and the screw extruder is extruded by driving a stirring shaft to rotate by an extrusion conveying motor to drive a screw blade.
Preferably, the heater is arranged on the preheating tank in a surrounding mode.
Preferably, the anaerobic fermentation apparatus is provided in a plurality of sets.
Preferably, the outer tank bodies of the charging tank, the preheating tank, the fermentation tank and the discharging tank are all covered with heat insulation materials.
Preferably, the charging tank, the preheating tank, the fermentation tank and the discharging tank are cylinders, cuboids, cubes or elliptic cylinders.
Compared with the prior art, the invention has the following beneficial effects:
1. the anaerobic fermentation device is integrally designed in the volume of a discharge tank, equipment is convenient to transport, the tanks are not connected by pipelines, the structure is compact, the occupied area is reduced, five self-closed structures are formed by the sleeving connection of four tanks and a feeding mechanism, the oxygen isolation effect is good, heat loss is prevented, anaerobic bacteria in the whole device can be recycled, self-heating circulation is realized by a combustion heating mechanism, and the whole process is automatic, so that the fermentation time is shortened, and the fermentation rate is improved;
2. according to the invention, the charging tank adopts an upper inlet and a lower outlet, the preheating tank adopts a lower inlet and an upper outlet, the fermentation tank adopts an upper inlet and an upper outlet, the discharging tank adopts an upper inlet and an upper outlet, the inlet and the outlet of the tank body are in different directions while the tank body is in the upper inlet and the upper outlet, so that the fermentation process is prolonged, and the full fermentation of materials is facilitated;
3. the device can be used for treating livestock excrement in rural farms, and can be applied to centralized excrement recycling treatment of urban crowds in parallel by adopting an integrated mode, so that the environment is improved, and recycling is realized;
4. the invention adopts the heat insulation material to cover the outer tank body, can ensure that the tank body keeps normal fermentation temperature in winter, and improves the methane yield.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of the flow structure of the present invention;
FIG. 3 is a schematic view of the self-sealing of the feed mechanism of the present invention;
FIG. 4 is a schematic feed diagram of the feed mechanism of the present invention;
FIG. 5 is a schematic view of another perspective of the feed mechanism with screw extruder of the present invention.
Detailed Description
The invention will now be described in detail with reference to fig. 1-5, wherein exemplary embodiments and descriptions of the invention are provided to illustrate the invention, but not to limit the invention.
A self-heating circulation multi-tank nested anaerobic fermentation device comprises a feeding tank 1, a preheating tank 3, a fermentation tank 12 and a discharge tank 14 which are sequentially nested from inside to outside, wherein a material 23 enters from a feeding mechanism 2 at the top of the feeding tank and enters the preheating tank through a feeding tank outlet 11 at the bottom of the feeding tank, the feeding mechanism comprises a feeder 2.1 and a balance shaft 2.3 connected with the feeder, a closed door 2.4 is arranged on the balance shaft, one end of the closed door is inserted into the feeder and used for preventing the feeding of the feeder, a balance weight 2.2 is arranged at the bottom of the other end of the closed door with the balance shaft as a boundary point, the mass of the balance weight is larger than that of the closed door, the closed door of the material is opened when the material is poured into the device, and the closed door is upwards rotated and closed under the action of the balance weight after the feeding is finished and reaches the lower end of the inner wall of the feeder of the device and is prevented from continuing to rotate, thus, the air can be reduced, the air isolation effect is achieved, a screw extruder is connected in the feeder, the screw extruder is driven by an extrusion conveying motor 17 to rotate a stirring shaft to drive a screw blade 27 to extrude, biomass materials with poor liquidity are forcibly pressed into a feeding tank, a preheating tank outlet 16 is arranged on one side of the upper wall of the preheating tank, a heater 9 is installed in the fermentation tank and is arranged on the preheating tank in a surrounding mode to facilitate uniform heating, a temperature sensor is further arranged on the heater to monitor the heat temperature at any time and facilitate the input of heat by a controller, a fermentation tank outlet 7 opposite to the outlet direction of the preheating tank is arranged on the upper wall of the fermentation tank, a discharge tank outlet 15 is arranged on one side of the upper wall of the discharge tank, and biogas slurry in the discharge tank flows into a liquid organic fertilizer storage through a pipeline and a valve control on the pipeline from the discharge tank outlet, or fertilizing crops through a drip irrigation pipe network, or further discharging water quality reaching standards through a sewage treatment system, wherein biogas overflow outlets 6 at the tops of the fermentation tank and the discharge tank are communicated with a biogas prestoring tank 4 through biogas pipelines, a biogas conveying port 5 connected with one end of a combustion heating mechanism 17 is arranged on the biogas prestoring tank, and the other end of the combustion heating mechanism is connected with a heater.
A biogas conveying port of the biogas prestoring tank is respectively connected with the biogas storage tank and the combustion heating mechanism through a first biogas pipe and a second biogas pipe which are connected in parallel, the first biogas pipe is provided with a third valve 24 for controlling biogas of the biogas prestoring tank to flow out, the second biogas pipe is provided with a fourth valve 25 for controlling biogas to flow into the combustion heating mechanism, and a first circulating pump 18 is arranged between the combustion heating mechanism and a heater inlet 9.1 of the heater.
Go into the bottom of material jar, preheating tank, fermentation cylinder and play feed tank and all be equipped with settler 13, each the settler all communicates in back flow 8 through circulating line, and all is equipped with first valve 26 on each circulating line, each one side of settler all is equipped with slag notch 13.1, the flange is installed to the slag notch, can carry out slag tapping through the slag notch and handle and overhaul of the equipments, be equipped with liquid sample valve 20 on the back flow, the back flow pipe passes through second circulating pump 19 and second valve 21 intercommunication pan feeding jar entry 22.
The anaerobic fermentation devices are arranged into a plurality of groups, and the integrated mode can be applied to the centralized recycling treatment of the excrement of urban people.
The outer tank bodies of the charging tank, the preheating tank, the fermentation tank and the discharging tank are all covered with heat insulation materials, the temperature required by normal fermentation can be kept in winter, the living conditions of microorganisms are met, the fermentation temperature is generally 30-38 ℃, the fermentation pH value is 6.8-7.2, and the fermentation tanks can live in a proper environment to achieve the purposes of vigorous fermentation and high gas production, the contact positions of the tank body materials are all made of stainless steel materials, or carbon steel Q235B lining enamel is corrosion-resistant, and the charging tank, the preheating tank, the fermentation tank and the discharging tank are cylinders, cuboids, cubes or ellipsoids.
The device is integrally designed in the volume of a discharge tank, the structure can be more compact by adopting a tank-in-tank mode, the construction of earth and stone is not needed, the anaerobic fermentation is equipment-based, the equipment transportation is convenient, the installation is convenient, the device is not only suitable for the miniaturization treatment of livestock excrement in rural farms, and also can be used for realizing the concentrated recycling treatment of excrement of urban crowds by adopting an integrated mode; the fermentation process of the tank-in-tank structure mode is not shortened, the material feeding tank adopts the upper inlet and the lower outlet, the preheating tank enters and exits from the lower part, the fermentation tank enters and exits from the upper part, but the inlet and the outlet are in the opposite directions, so the process can be correspondingly prolonged; and the discharge tank still goes up out of going up still, contrast pipeline formula anaerobic fermentation flow still correspondingly increases, and the resistance than the pipeline is in order a lot of less, also discharge the jar outside along with the feeding to the air in the jar easily, the natural pond sediment is convenient for the layering with natural pond liquid, natural pond liquid overflows through jar upper portion export, and natural pond sediment subsides in each tank bottoms portion residence time will be long a lot relatively, the biomass of being convenient for is fully further degraded, natural pond sediment volume diminishes like this, the gas production increases, its feeding ejection of compact is just also easy, the condition of flow in-process jam can not appear, and a plurality of these equipment connect in parallel can also realize large-scale production and solve the difficult problem of the large-scale processing living beings fermentation inefficiency.
This device separates oxygen effectual in addition, cup joints through four jar bodies and forms four self-exclusion air settings, except that go into the material jar from last to down, other preheating tanks go into from top to bottom, go up out on the fermentation cylinder, go out the tank and also go up out on going out, the living beings that have all adopted the fermentation flow from up down, be convenient for like this to air escape to cooperation feeding mechanism's setting has formed the fifth self-confinement structure, and can also prevent that the heat from running off.
The device is provided with a plurality of fermentation process stages, wherein the charging tank is a hydrolysis stage, the preheating tank and the fermentation tank are acidification stages, the preheating tank and the charging tank are in incomplete anaerobic digestion, the preheating tank is an acidification primary stage, the fermentation tank is an acidification secondary stage, and the discharging tank is a methane gasification stage. Human and animal poultry excrement and urine, straw, mud rubbish etc. under certain moisture, temperature and this scheme characteristic anaerobic facilities, the macromolecule of being insoluble in water in waste water, livestock liquid dung or mud includes: protein, polysaccharide, lipid, etc. can be gradually cracked into amino acid, glycerol, fatty acid, C6H12O6, etc. under the action of zymophyte. Two further broad classes of substances are produced, the first being: formic acid, methanol, methylamine, acetic acid and the like, which directly become methane, carbon dioxide and the like under the action of methane bacteria; and the second major category is: propionic acid, butyric acid, lactic acid, ethanol, etc., which will generate carbon dioxide, hydrogen and acetic acid and methane under the action of hydrogen-producing and acetogenic bacteria. The solid biomass is always immersed in the liquid biomass water solution through a fluid layering scheme, and the decomposition and the metabolism of various microorganisms finally form methane, carbon dioxide and other combustible mixed gases, namely the methane. The novel equipment for methane fermentation, namely the anaerobic fermentation tank, is convenient to popularize and popularize. The basic process flow of the working principle of the anaerobic fermentation tank comprises feeding, anaerobic fermentation, discharging and resource utilization (organic fertilizer raw materials), the whole process has high automation degree, strong closure and no secondary pollution, the activity of microorganisms in excrement is fully utilized to decompose organic matters, the high temperature generated by the organic matters is utilized to thoroughly decompose the materials, so that harmful substances such as pathogens and bacteria are killed, the water content of the materials is continuously reduced in the fermentation process, and the volume is reduced; the fermented manure can be used as an organic liquid fertilizer raw material for agricultural production, and the purposes of harmlessness, reduction and recycling are really realized.
In the implementation process, biological organic matter materials (including sludge, livestock manure, straw stalks and the like) enter the bottom of the feeding tank from the feeding mechanism, the closed door is opened when the materials are fed, the closed door is opened when the materials are poured into the device as shown in fig. 4, the closed door rotates upwards under the action of the balance block and is closed after the materials are fed, the materials reach the lower end of the inner wall of a feeder of the device and are prevented from rotating continuously, the materials flow out from an outlet of the feeding tank and rise in the preheating tank to fill the whole preheating tank, air in the preheating tank can be exhausted, the materials flow into the fermentation tank through the outlet of the preheating tank after being preheated, heat conducted by the heater is continuously obtained, and the temperature of the heat can indicate whether a combustion heating mechanism connected with the heater works or not through the temperature sensor or control the size of the input heat. In the liquid that the fermentation cylinder came out entered into the ejection of compact jar through the fermentation cylinder export, marsh gas in fermentation cylinder and the ejection of compact jar entered into marsh gas prestore jar through the marsh gas pipeline of marsh gas overflow exit linkage, reentrant marsh gas transports the marsh gas delivery port of pipeline, and natural pond liquid flows into liquid fertilizer accumulator through ejection of compact jar export in the ejection of compact jar, perhaps fertilizes for the crop through the drip irrigation pipe network, or further carries out quality of water discharge to reach standard through sewage treatment system. The settlers arranged at the bottoms of the charging tank, the preheating tank, the fermentation tank and the discharging tank are used for storing biogas residues, so that biomass can be fully and further degraded, slag outlets on the settlers are favorable for slag discharge and maintenance, the slag taking period of each settler is different in length, the discharging tank can be used for one time every several years, while the charging tank and the fermentation tank can be used for one time every month, naturally, the biogas slurry which is further degraded in the settlers flows into the return pipe under the control of the first valves of the circulating pipeline and the circulating pipeline, anaerobic fermentation bacteria in the biogas slurry are pumped into the inlet of the charging tank through the liquid sampling valve and the second circulating pump and then respectively flow into the charging tank or the preheating tank, so that the anaerobic fermentation process of the biomass is accelerated, and the anaerobic fermentation period of the system is shortened; on the other hand, in winter or in case of low climate temperature, the combustion heating means, which may be a biogas boiler, starts to operate. One part of the marsh gas flowing out of the marsh gas prestoring tank flows out of the first marsh gas pipe through the control of the third valve, is filtered and then flows into the marsh gas storing tank, and then is conveyed to each household, the other part of the marsh gas flows into the combustion heating mechanism from the second marsh gas pipe through the control of the third valve and the fourth valve, fuel is provided for the combustion heating mechanism, heated medium is pumped into a heater inlet in the fermentation tank through the first circulating pump to heat the biomass in the anaerobic fermentation process, the self-heating circulation is realized through the repeated cyclic utilization, the materials are further degraded, and the output of the marsh gas is improved.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a self-heating circulation multiscan looks nested formula anaerobic fermentation device which characterized in that: comprises a charging tank (1), a preheating tank (3), a fermentation tank (12) and a discharging tank (14) which are sequentially sleeved from inside to outside, wherein materials (23) enter from a feeding mechanism (2) at the top of the charging tank, and enters the preheating tank through a feeding tank outlet (11) at the bottom of the feeding tank, a preheating tank outlet (16) is arranged on one side of the upper wall of the preheating tank, a heater (9) is arranged in the fermentation tank, a fermentation tank outlet (7) with the direction opposite to that of the outlet of the preheating tank is arranged on the upper wall of the fermentation tank, a discharging tank outlet (15) is arranged on one side of the upper wall of the discharging tank far away from the outlet of the fermentation tank, the biogas overflow outlets (6) at the tops of the fermentation tank and the discharge tank are communicated with a biogas prestoring tank (4) through biogas pipelines, the biogas prestoring tank is provided with a biogas conveying port (5) connected with one end of a combustion heating mechanism (17), and the other end of the combustion heating mechanism is connected with a heater.
2. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 1, wherein: the biogas pre-storage device is characterized in that a biogas conveying port of the biogas pre-storage tank is respectively connected with the biogas storage tank and the combustion heating mechanism through a first biogas pipe and a second biogas pipe which are connected in parallel, the first biogas pipe is provided with a third valve (24) for controlling biogas of the biogas pre-storage tank to flow out, the second biogas pipe is provided with a fourth valve (25) for controlling biogas to flow into the combustion heating mechanism, and a first circulating pump (18) is arranged between the combustion heating mechanism and a heater inlet (9.1) of the heater.
3. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 1, wherein: go into the bottom of material jar, preheating tank, fermentation cylinder and ejection of compact jar and all be equipped with settler (13), each the settler all communicates in back flow (8) through circulating line, and all is equipped with first valve (26) on each circulating line, be equipped with liquid sample valve (20) on the back flow, the back flow pipe passes through second circulating pump (19) and second valve (21) intercommunication pan feeding jar entry (22).
4. The autothermal-cycle multi-tank phase-nested anaerobic fermentation device of claim 3, wherein: each one side of settler all is equipped with slag notch (13.1), the flange is installed to the slag notch.
5. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 1, wherein: the feeding mechanism comprises a feeder (2.1) and a balance shaft (2.3) connected with the feeder, a closed door (2.4) is arranged on the balance shaft, one end of the closed door is inserted into the feeder and used for preventing the feeder from feeding, a balance block (2.2) is arranged at the bottom of the other end of the closed door, which takes the balance shaft as a dividing point, and the mass of the balance block is greater than that of the closed door.
6. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 5, wherein: a screw extruder is connected in the feeder, and the screw extruder is extruded by driving a stirring shaft to rotate by an extrusion conveying motor (17) to drive a screw blade (27).
7. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 1, wherein: the heater is arranged on the preheating tank in a surrounding mode.
8. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 1, wherein: the anaerobic fermentation devices are arranged in a plurality of groups.
9. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 1, wherein: the outer tank bodies of the charging tank, the preheating tank, the fermentation tank and the discharging tank are all covered with heat insulation materials.
10. The autothermal cycle multi-tank phase set anaerobic fermentation device of claim 1, wherein: the charging tank, the preheating tank, the fermentation tank and the discharging tank are cylinders, cuboids, cubes or elliptic cylinders.
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