CN116790355A

CN116790355A - Container type dry anaerobic fermentation device

Info

Publication number: CN116790355A
Application number: CN202310797797.1A
Authority: CN
Inventors: 傅国志; 张廷军; 马宗虎; 刘磊; 李剑; 陈冠英; 潘宁; 张万钦; 吴宜蓁; 陈祎; 赵健
Original assignee: Huadian Zhongguang New Energy Technology Co ltd; China Huadian Engineering Group Co Ltd
Current assignee: Huadian Zhongguang New Energy Technology Co ltd; China Huadian Engineering Group Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-09-22

Abstract

The invention relates to the technical field of fermentation devices, in particular to a container type dry anaerobic fermentation device. The anaerobic fermentation system of the container type dry anaerobic fermentation device is integrally arranged in a closed box body, the control system is integrally arranged in a control cabinet, and the filtrate backflow system is integrated equipment; the anaerobic fermentation system, the filtrate reflux system and/or the control system are/is connected through a pipeline or a circuit; the container type dry anaerobic fermentation device comprises at least one anaerobic fermentation system. Through anaerobic fermentation system, filtrate return system and control system's integrated setting, in the use, can transport anaerobic fermentation system, filtrate return system and control system to appointed place through the vehicle, then through pipeline and circuit connection each system can, need not a large amount of engineering construction, has the advantage of using simple to operate to the system that integrates can accomplish miniaturization, accords with miniaturized application scenario's demand.

Description

Container type dry anaerobic fermentation device

Technical Field

The invention relates to the technical field of fermentation devices, in particular to a container type dry anaerobic fermentation device.

Background

Biogas technology includes manufacturing and high value utilization technologies. The biogas preparation technology mainly comprises a wet fermentation technology and a dry fermentation technology, wherein the wet fermentation technology is a traditional technology, is widely applied to European biogas engineering, and is typically a complete mixed anaerobic fermentation technology (CSTR for short) of Envitec and MT company in Germany. The dry anaerobic fermentation technology has the characteristics of strong raw material adaptability, large treatment load, less equipment investment, low process energy consumption, no wastewater discharge and the like, and gradually becomes the main development direction of industry in Europe, and representative processes are Germany Bioferm and GICON processes, french SPI company percolate reflux dry anaerobic fermentation technology, VALORGA process, sweden Kompogas process and the like. The technology of French SPI company can be suitable for various materials such as cultivation waste, straw and organic garbage, and is one of the important attention technologies in domestic biogas industry.

Through investigation, the miniaturized dry anaerobic fermentation equipment has products abroad, and mature industrial products are not found in China. The foreign dry fermentation technical equipment is mainly Laran technology or Kompogas technology, and is mainly horizontal drum-type continuous dry fermentation. The domestic miniaturized anaerobic fermentation equipment is mainly wet anaerobic fermentation equipment and a household concrete methane tank.

The percolate reflux dry anaerobic fermentation technology and the drum dry technology of the French SPI company are more advanced than the traditional wet technology. Compared with a roller type dry process, the garage type dry process has the advantages of higher convenience, lower manufacturing cost, more stable operation and higher gas production rate.

Although the percolate reflux dry anaerobic fermentation has a great advantage, the percolate reflux dry anaerobic fermentation technology of the French SPI company is an engineering technology and is characterized by large scale and large scale, and the method is suitable for large-scale farms, garbage disposal plants and agricultural processing waste disposal, and cannot meet the requirements of small-scale farms, village and town garbage, farms, reed and other straw disposal, and small-scale application scenes of large supermarkets and schools.

Disclosure of Invention

A first object of the present invention is to provide a container type dry anaerobic fermentation apparatus capable of solving the problems existing in the prior art;

the invention provides a container type dry anaerobic fermentation device which comprises an anaerobic fermentation system, a filtrate backflow system and a control system;

the anaerobic fermentation system is integrated in a closed box body, the control system is integrated in a control cabinet, and the filtrate backflow system is integrated equipment;

the anaerobic fermentation system, the filtrate reflux system and/or the control system are/is connected through a pipeline or a circuit;

the container type dry anaerobic fermentation device comprises at least one anaerobic fermentation system, and when the anaerobic fermentation systems are multiple, the anaerobic fermentation systems are arranged in parallel and independently operate.

Preferably, the anaerobic fermentation system comprises a reaction bin, and a spray header is arranged at the top of the reaction bin; the reaction bin is a closed box body, and a sealing door is arranged on one side of the closed box body;

the lower part of the sealing door is provided with an observation window.

Preferably, a spraying pipeline, a purging pipeline, a biogas collecting pipeline and a positive and negative pressure pipeline are arranged in the reaction bin;

the spraying pipeline, the purging pipeline, the biogas collecting pipeline and the positive and negative pressure pipeline are arranged at the upper part of the reaction bin;

a spray header is arranged on the spray pipeline;

the spraying pipeline, the purging pipeline, the biogas collecting pipeline and the positive and negative pressure pipeline are connected with the reaction bin through flanges.

Preferably, the bottom surface of the reaction bin is of an inclined surface structure;

the outlet of the reaction bin is provided with a percolate reflux port for the lower end arranged at one side of the reaction bin, and the percolate reflux port is arranged at the lower end corresponding to the inclined plane structure.

Preferably, a filtering device is arranged at the position of the reaction bin corresponding to the percolate reflux port.

Preferably, a temperature probe is arranged at the middle part of the reaction bin.

Preferably, the filtrate reflux system comprises a filtrate reflux tank, a filtrate collection tank and a filtrate circulating pump;

the outlet of the seepage backflow tank is communicated with the spray header, and the seepage backflow tank is also connected with a heating device;

the outlet of the reaction bin is communicated with the inlet of the seepage backflow tank;

the inlet of the percolate collecting tank is communicated with the outlet of the reaction bin, and the percolate collecting tank, the percolate reflux tank and the reaction bin are connected through a pipeline and are subjected to liquid circulation through a percolate circulating pump.

Preferably, the percolate circulating pump is a bidirectional pump, and the bidirectional pump comprises a first pump port and a second pump port;

the seepage reflux tank is provided with a first reflux tank pipeline and a second reflux tank pipeline;

the check valves on the first reflux tank pipeline and the second reflux tank pipeline are different in flow direction;

the first end of the first reflux tank pipeline and the first end of the second reflux tank pipeline are communicated with the seepage reflux tank, and the second end of the first reflux tank pipeline and the second end of the second reflux tank pipeline are communicated with the first pump port of the seepage circulating pump;

the seepage and reflux tank is communicated with the seepage and reflux pump through a first pipeline, one end of the first pipeline is communicated with a second pump port of the seepage and reflux pump, the other end of the first pipeline is communicated with the first reflux tank pipeline, the first pipeline is connected to a pipeline between the check valve and the seepage and reflux tank, and a first valve is arranged on the first pipeline;

the percolate collecting tank is communicated with the percolate circulating pump through a second pipeline, one end of the second pipeline is communicated with the percolate collecting tank, the other end of the second pipeline is communicated with a second pump port, and a second valve is arranged on the second pipeline;

the spray header in the reaction bin is communicated with the percolate circulating pump through a third pipeline, one end of the third pipeline is communicated with the spray header, the other end of the third pipeline is communicated with the second pump port, and a third valve is arranged on the third pipeline.

Preferably, the control system is used for monitoring anaerobic reaction conditions in the reaction bin and controlling the working state of the filtrate backflow system so as to realize the spraying time and the spraying temperature of the backflow liquid;

the dry anaerobic fermentation device also comprises a control cabinet, and the control system is arranged in the control cabinet;

a biogas film, a generator module and a biogas hanging furnace module are arranged in the control cabinet;

the gas inlet of the biogas film is communicated with the biogas outlet of the anaerobic fermentation system and the filtrate reflux system;

the gas outlet of the biogas film is communicated with the gas inlets of the generator module and the biogas wall-mounted furnace module;

and the heat recovery pipeline of the generator module and the hot water pipeline of the biogas wall-mounted furnace module are communicated with the heating device of the seepage backflow tank.

Preferably, the control cabinet is provided with an exhaust fan.

The beneficial effects are that:

through anaerobic fermentation system, filtrate return system and control system's integrated setting, in the use, can transport anaerobic fermentation system, filtrate return system and control system to appointed place through the vehicle, then through pipeline and circuit connection each system can, need not a large amount of engineering construction, has the advantage of using simple to operate to the system that integrates can accomplish miniaturization, accords with miniaturized application scenario's demand.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a container type dry anaerobic fermentation device according to an embodiment of the present invention;

FIG. 2 is a front view of an anaerobic fermentation system according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken "A-A" of FIG. 2;

FIG. 4 is a side view of an anaerobic fermentation system according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the internal structure of an anaerobic fermentation system according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a filtrate reflux system and anaerobic fermentation system according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a control system according to an embodiment of the present invention.

Reference numerals illustrate:

1: anaerobic fermentation system, 2: filtrate reflux system, 3: a control cabinet;

11: reaction bin, 12: sealing door, 13: viewing window, 14: spray pipe, 15: purge piping, 16: biogas collection pipe, 17: positive and negative pressure piping, 18: percolate return port, 19: a temperature probe;

21: spray header, 22: seepage reflux drum, 23: filter device, 24: leachate collection tank, 25: leachate circulation pump, 26: check valve, 27: first valve, 28: second valve, 29: a third valve;

231: fence, 232: filter grate, 241: an empty diffusing pipe;

31: biogas film, 32: generator module, 33: biogas wall-mounted furnace module, 34: electric control cabinet, 35: electromechanical cabinet, 36: exhaust fan, 37: an air compressor module; 38: a flow meter; 39: and a heat supply pipeline module.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 7, in the present embodiment, there is provided a container type dry anaerobic fermentation apparatus including an anaerobic fermentation system 1, a filtrate return system 2, and a control system.

The anaerobic fermentation system 1 is integrated in a closed box body, the control system is integrated in a control cabinet 3, and the filtrate backflow system 2 is integrated equipment.

The anaerobic fermentation system 1, the filtrate reflux system 2 and/or the control system are connected through pipelines or circuits.

The container type dry anaerobic fermentation device comprises at least one anaerobic fermentation system 1, and when the anaerobic fermentation systems 1 are multiple, the multiple anaerobic fermentation systems 1 are arranged in parallel and independently operate.

Through anaerobic fermentation system 1, filtrate return system 2 and control system's integrated setting, in the use, can transport anaerobic fermentation system 1, filtrate return system 2 and control system to appointed place through the vehicle, then through pipeline and circuit connection each system can, need not a large amount of engineering construction, has the advantage of convenient to use simple to operate to the system that integrates can accomplish miniaturization, accords with miniaturized application scenario's demand.

Anaerobic fermentation system 1 includes reaction storehouse 11, and the top of reaction storehouse 11 is provided with shower head 21.

The filtrate reflux system comprises a seepage reflux tank 22, and the outlet of the seepage reflux tank 22 is communicated with a spray header 21.

The outlet of the reaction chamber 11 is communicated with the inlet of the seepage backflow tank 22.

The control system is used for monitoring anaerobic reaction conditions in the reaction bin 11 and controlling the working state of the filtrate backflow system so as to realize the spraying time of backflow liquid.

In this embodiment, through the setting of filtrate return system 2 to can spray the natural pond liquid that has temperature and anaerobe in the infiltration liquid return tank to the material under control system's control, realized anaerobic fermentation process, need not set up agitating unit in the reaction bin 11 for current drum-type fermenting installation, simplified fermenting installation's structure, reduced use cost.

Anaerobic fermentation system 1

As shown in fig. 2 to 6, the reaction chamber 11 is a closed casing, one side of the closed casing is provided with a sealing door 12, and an observation window 13 is provided at the lower part of the sealing door 12.

In this embodiment, the closed box body is manufactured to have a container-like structure, that is, the outer structure of the closed box body is similar to that of a container, so that the anaerobic fermentation system 1 can be conveniently transported. For example, the reaction chamber 11 may be formed as a container formed by welding carbon steel.

The reaction bin 11 is internally provided with a spray pipeline 14, a purge pipeline 15, a biogas collection pipeline 16 and a positive and negative pressure pipeline 17. The spray pipe 14, the purge pipe 15, the biogas collection pipe 16 and the positive and negative pressure pipe 17 are arranged at the upper part of the reaction bin 11.

The shower pipe 14 is provided with a shower head 21. The spraying pipeline 14, the purging pipeline 15, the biogas collecting pipeline 16 and the positive and negative pressure pipeline 17 are connected with the reaction bin 11 through flanges.

After the marsh gas is generated in the reaction bin 11, the marsh gas enters the marsh gas film 31 through the marsh gas collecting pipeline 16, and then the marsh gas is generated or burnt for secondary use. The reaction chamber 11 realizes the pressure equalization in the chamber within 10mbar through positive and negative pressure pipelines 17. When the content of hydrogen sulfide in the reaction bin 11 is too high, oxygen can be supplemented through the purging pipeline 15 to realize biological desulfurization in the bin.

And when the reaction period in the reaction bin 11 is finished, a valve of a purging pipeline 15 is opened, after the residual tail gas in the bin is replaced by a fan, a sealing door 12 is opened, and a reaction period is completed after discharging.

All the pipelines are connected in a flange mode, so that the whole reactor is conveniently detached and installed on site after factory testing, and the whole reactor is integrated into one product.

The bottom surface of the reaction bin 11 is of an inclined surface structure, the outlet of the reaction bin 11 is a percolate return opening 18 arranged at the lower end of one side of the reaction bin 11, and the percolate return opening 18 is arranged corresponding to the lower end of the inclined surface structure.

Specifically, the reaction bin 11 is installed on a foundation with a 1% gradient, after raw materials are piled up in the bin, biogas slurry with temperature and anaerobic bacteria in the seepage and reflux tank 23 is sprayed on the materials through the spraying pipeline 14, and flows to the container bottom plate after passing through the materials through the gravity infiltration effect, because the 1% gradient feed liquid flows back to the seepage and reflux port 18 at the tail of the bin body, and flows into the seepage and reflux tank 23, and the mass transfer and heat transfer process of the materials is completed.

The reaction bin 11 is provided with a filtering device 23 at a position corresponding to the percolate reflux port 18. Two kinds of filtering devices 23, namely a filtering fence and a filtering grate, are arranged in the reaction bin 11. The filtering fence is used for supporting materials at the tail part, so that large objects cannot pass through the filtering fence. The filter grate is used for filtering liquid and is used for ensuring that weeds, straws and other objects which are easy to block the percolate pipeline are intercepted.

A temperature probe 19 is arranged in the middle of the reaction chamber 11. The temperature probe 19 is used to monitor the problem of the material in the reaction chamber 11.

The anaerobic fermentation system 1 may be further provided with a forklift and a mixer, and a plurality of reaction chambers 11 may be provided during the use.

The fermentation process of the anaerobic fermentation system 1 is as follows: firstly, materials enter a mixing stirrer through a forklift, after stirring, the materials are sent into a reaction bin 11 through the forklift, and the anaerobic fermentation system 1 comprises at least 2 reaction bins 11 which independently operate. Each reaction bin 11 is internally provided with a set of independent anaerobic reaction devices (a spraying pipeline 14, a purging pipeline 15, a biogas collecting pipeline 16, a positive and negative pressure pipeline 17 and the like), and a plurality of reaction bins 11 are in a complementary parallel connection relationship.

The stirred materials are biochemically reacted in the enclosed environment of the reaction bin 11 and in a spraying state to generate biogas, and the biogas enters the biogas film 31 through the biogas collecting pipeline 16. After the operation for 30 days, the tail gas in the cabin is emptied through the purging pipeline 15, the sealing door 12 of the reaction cabin 11 is opened, the biogas residues are emptied by utilizing the forklift, and the biogas residues are washed by clear water and then enter the next gas making cycle. The anaerobic fermentation system 1 maintains the constant temperature of 38 ℃ of the materials in the reaction bin 11, the reflux liquid is sprayed at regular time, and the pressure of the reaction bin 11 is lower than 10mbar.

Filtrate reflux system

As shown in fig. 1 and 6, the filtrate recirculation system includes a permeate collection tank 24 and a permeate circulation pump 25 in addition to a shower head 21, a filtrate recirculation tank 22, and a filter device 23.

The inlet of the percolate collection tank 24 is communicated with the outlet (percolate return port 18) of the reaction chamber 11, and the percolate collection tank 24, the percolate return tank 22 and the reaction chamber 11 are connected by a pipeline and are subjected to liquid circulation by a percolate circulation pump 25.

Wherein, the spray header 21 and the filter device 23 are arranged in the reaction bin 11. The filtrate reflux tank 22, the percolate collecting tank 24 and the percolate circulating pump 25 are integrated by connecting pipelines and valves among the three. The integrated device can be integrally arranged in a box body or on a platform, and in the use process, the integrated device is only required to be placed at the rear side of the reaction bin 11 and then is communicated with the percolate reflux port 18 and the spray pipe 14 through pipelines, so that the integrated device has the advantages of convenience in use and installation.

The percolate circulation pump 25 is a bi-directional pump comprising a first pump port and a second pump port. The permeate return tank 22 is provided with a first return tank line and a second return tank line.

The first and second return tank lines are each provided with a check valve 26, the check valves 26 on the first and second return tank lines flowing differently.

The first end of the first reflux tank pipe and the first end of the second reflux tank pipe are communicated with the percolate reflux tank 22, and the second end of the first reflux tank pipe and the second end of the second reflux tank pipe are communicated with the first pump port of the percolate circulating pump 25.

The permeate return tank 22 is connected to the permeate circulation pump 25 via a first line, one end of which is connected to a second pump port of the permeate circulation pump 25 and the other end of which is connected to the first return tank line, and which is connected to a line between the check valve 26 and the permeate return tank 22, and which is provided with a first valve 27.

The percolate collection tank 24 is connected to a percolate circulation pump 25 via a second line, one end of which is connected to the percolate collection tank 24 and the other end is connected to a second pump port, and a second valve 28 is arranged on the second line.

The spray header 21 in the reaction bin 11 is communicated with the percolate circulating pump 25 through a third pipeline, one end of the third pipeline is communicated with the spray header 21, the other end of the third pipeline is communicated with the second pump port, and a third valve 29 is arranged on the third pipeline.

The heating device is arranged in the seepage and reflux tank 22, so that the seepage and reflux tank 22 can be heated, the temperature of the seepage and reflux can be controlled, and further the temperature of materials can be controlled.

The percolate collection tank 24 is provided with an empty diffusing pipe 241, and the inlet end of the empty diffusing pipe 241 is positioned at the upper end of the percolate collection tank 24. The arrangement of the air bleeding pipe 241 is an important link of the filtrate backflow system, ensures the smooth backflow of the backflow liquid, and can reduce the generation of air resistance.

The working process of the filtrate reflux system is as follows:

after the reaction chamber 11 is fully piled up, the sealing door 12 is closed. And starting a spray control system, opening a third valve 29, closing a second valve 28 and a first valve 27, and enabling the feed liquid of the seepage backflow tank 22 to enter the spray header 21 through a spray 3 pipeline by a bidirectional spray pump so as to realize spraying in a garage. The spray liquid falls to the bottom surface of the reaction bin 11 through gravity filtration, is filtered through a first fence 231, is filtered through a second filter of a filter grid 232, and enters a percolate collection tank 24 for third filtering. The three-channel filtration can ensure the pipeline trafficability of the spray liquid, and greatly reduce the possibility of pipeline blockage.

The bidirectional spray pump realizes triple functions of one pump through valve switching, so that investment is effectively reduced, and meanwhile, the pump and a pipeline form a pump set skid-mounted integrated device, and only three devices of a seepage backflow tank 22, a seepage backflow tank and a pump set are arranged on the appearance.

The switching of the three functions of the pump group is realized through a valve switch. Function one: the permeate return tank is fed into the permeate return tank 22 by a pump stack, opening the second valve 28, closing the first valve 27, and closing the third valve 29. And the function II: the liquid in the seepage and reflux tank 22 circulates automatically, the first valve 27 is opened, the second valve 28 is closed, and the third valve 29 is closed. And the third function: feed liquid in the seepage backflow tank 22 enters the reaction bin 11, the third valve 29 is opened, the second valve 28 is closed, and the first valve 27 is closed.

To sum up

The permeate flows back to the permeate collection tank 24 at the lowest point in the reaction chamber 11 by gravity filtration principle, and the permeate collection tank 24 is lifted to the permeate return tank 22 by the permeate return pump 25, and so on. The infiltration tank is also internally provided with a sealing device, and the biogas generated in the tank is integrated with a biogas film.

Control cabinet 3

As shown in fig. 1 and 7, the dry anaerobic fermentation device further comprises a control cabinet 3, the control system is arranged in the control cabinet 3, and a biogas film 31, a generator module 32, a biogas wall-mounted furnace module 33, a biogas analyzer, a flow indicator and an alarm are further arranged in the control cabinet 3.

The control cabinet 3 is manufactured into a container-like structure, and the inside of the control cabinet is divided into two areas by a carbon steel plate, wherein a gas storage film is placed in one area, and a control system, a generator module 32, a biogas wall-mounted furnace module 33, a biogas analyzer, a flow indicator and an alarm are arranged in one area. The gas storage, the gas utilization and the control are separated in different areas, so that the use safety of the control cabinet is improved.

In the embodiment, the control system, the biogas film 31, the generator module 32, the biogas wall-mounted furnace module 33 and other structures are integrated in one control cabinet, so that the integration degree of gas storage, gas utilization and control is higher, and the installation and later use are convenient.

The air inlet of the biogas film 31 is communicated with biogas outlets of the anaerobic fermentation system 1 and the filtrate reflux system 2.

The exhaust port of the biogas film 31 is communicated with the air inlets of the generator module 32 and the biogas hanging furnace module 33.

The heat recovery pipeline of the generator module 32 and the hot water pipeline of the biogas hanging furnace module 33 are communicated with the heating device of the seepage backflow tank 22.

The biogas generated by the dry anaerobic reaction bin 11 enters the biogas film 31 through the biogas pipeline for storage, and the biogas film 31 and the biogas pipeline are connected through a flange so as to be convenient for installation and maintenance.

The biogas pipeline is communicated with the biogas film 31 through a tee joint, one path of the tee joint is communicated with the biogas film 31, and the other path of the tee joint is communicated with the gas utilization part of the control cabinet 3.

The gas utilization part comprises a generator module 32 and a biogas wall-mounted furnace module 33.

A flow display device is arranged in the biogas pipeline, and the flow display device is a flowmeter 38.

The generator module 32 and the biogas hanging furnace module 33 are respectively provided with a hot water pipe and a return water pipe which are connected in parallel to the heat supply pipeline module 39.

The heat supply pipeline module 39 is externally connected with a hot water pipe and a water return pipe to the filtrate reflux tank 22, so as to form a heating circulation system. The heat supply pipeline module and the seepage liquid reflux tank exchange heat through the plate heat exchanger.

The generator module 32 and the biogas wall-hanging furnace module 33 are biogas utilization systems. The biogas entering the gas storage film is introduced into a biogas generator or a biogas water heater for combustion through a biogas blower, the combustion waste heat is converted into hot water through a heat exchanger and enters a heat supply pipeline, the heat supply pipeline is communicated with a heating coil in the percolate tank, and the percolate is heated to 42 ℃. The percolate realizes the control of the material temperature through a filtrate reflux system consisting of spraying, percolating and refluxing.

The control system comprises an electrical control cabinet 34 and an electrical cabinet 35, wherein the electrical control cabinet 34 and the electrical cabinet 35 are control centers of the container dry anaerobic fermentation system 1.

The electrical control cabinet 34 contains a control system and an electrical system, which control the start and stop of the pump and the fan of the fermentation system, the closing of the pneumatic valve, and the operation of the alarm system. The electric power cabinet 35 controls the start and stop of the generator, the start and stop signal of the generator is the gas quantity signal of the methane gas film 31, and the electric power cabinet 35 contains a grid-connected system.

The control system is a set of control software and hardware with PLC programming as a core, and consists of an integrated control electrical cabinet, sensors for temperature, pressure, liquid level and the like and a pneumatic valve. The temperature and pressure signals in each reaction bin 11 are transmitted to the PLC for monitoring anaerobic reaction conditions, and the operation of the percolate reflux pump is controlled through the height feedback signal of the liquid level meter. The control system is programmed with a further function to coordinate the spraying, run phases and run times of the plurality of reaction chambers 11. An anaerobic fermentation process is artificially divided into an aerobic stage, a facultative anaerobic stage, an anaerobic stage, a stabilization stage, a tail gas replacement stage and a discharging stage. Each stage is provided with a set of running programs. The control system also establishes a set of alarm device through signal feedback, and the alarm device is used for analyzing and recording the running state of the reaction bin 11 and for fault diagnosis.

An exhaust fan 36 and a methane leakage alarm device are arranged in the control cabinet 3, the exhaust fan 36 is arranged on the side wall of the control cabinet 3, and the methane leakage alarm device is positioned above the generator module 32.

The exhaust fan 36 and the biogas leakage alarm device are linked through a control system, so that a leakage alarm exhaust system in the container is realized.

The valve on the fermentation device is a pneumatic valve, an air compressor module 37 is arranged in the control cabinet 3, and the air compressor module 37 is connected with the pneumatic valve. The air compressor module 37 is a module for providing power for the pneumatic valves of the control system, and the full-field control valves are all pneumatic valves.

In summary, the fermentation apparatus in the present embodiment has the following advantages:

1. the dry anaerobic technology is adopted, so that the raw material application is wide, the gas production efficiency is high, and the energy consumption is low.

2. The fuel gas has good quality. The methane content is more than 55%, and the sulfur content of the fuel gas is low by adopting a biological desulfurization technology.

3. Compared with other technologies, the technology has no wastewater discharge and meets the high requirements of new areas on the environment.

4. The environment fusion degree is high, and no higher building exists.

5. Stability and reliability: each fermentation bin independently operates, and the whole can not be influenced by single occurrence of problems, so that the fermentation bin can be quickly recovered.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The container type dry anaerobic fermentation device is characterized by comprising an anaerobic fermentation system, a filtrate backflow system and a control system;

2. The container type dry anaerobic fermentation device according to claim 1, wherein the anaerobic fermentation system comprises a reaction bin, and a spray header is arranged at the top of the reaction bin;

the reaction bin is a closed box body, and a sealing door is arranged on one side of the closed box body;

the lower part of the sealing door is provided with an observation window.

3. The container type dry anaerobic fermentation device according to claim 2, wherein a spraying pipeline, a purging pipeline, a biogas collecting pipeline and a positive and negative pressure pipeline are arranged in the reaction bin;

a spray header is arranged on the spray pipeline;

4. The container type dry anaerobic fermentation device according to claim 2, wherein the bottom surface of the reaction bin is of an inclined surface structure;

5. The dry anaerobic fermentation device of container type according to claim 4, wherein the reaction bin is provided with a filtering device at a position corresponding to the percolate return port.

6. The container type dry anaerobic fermentation device according to claim 2, wherein a temperature probe is arranged at the middle position of the reaction bin.

7. The dry anaerobic fermentation device of claim 4, wherein the filtrate return system comprises a permeate return tank, a permeate collection tank, and a permeate circulation pump;

8. The dry anaerobic fermentation device of claim 7, wherein the anaerobic fermentation device comprises a tank,

the percolate circulating pump is a bidirectional pump, and the bidirectional pump comprises a first pump port and a second pump port;

9. The container type dry anaerobic fermentation device according to claim 1, wherein the control system is used for monitoring anaerobic reaction conditions in the reaction bin and controlling the working state of the filtrate reflux system so as to realize the spraying time and the spraying temperature of the reflux liquid;

10. The dry anaerobic fermentation device of claim 9, wherein the control cabinet is provided with an exhaust fan.