CN111363669B - A continuous dry anaerobic-aerobic two-stage coupled fermentation system - Google Patents
A continuous dry anaerobic-aerobic two-stage coupled fermentation system Download PDFInfo
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- CN111363669B CN111363669B CN202010403633.2A CN202010403633A CN111363669B CN 111363669 B CN111363669 B CN 111363669B CN 202010403633 A CN202010403633 A CN 202010403633A CN 111363669 B CN111363669 B CN 111363669B
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- 238000000855 fermentation Methods 0.000 title claims abstract description 113
- 230000004151 fermentation Effects 0.000 title claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 136
- 238000007599 discharging Methods 0.000 claims abstract description 46
- 238000010564 aerobic fermentation Methods 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims description 39
- 239000005341 toughened glass Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 14
- 239000007787 solid Substances 0.000 abstract description 9
- 239000002154 agricultural waste Substances 0.000 abstract description 5
- 239000003337 fertilizer Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 239000010815 organic waste Substances 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000003895 organic fertilizer Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/16—Solid state fermenters, e.g. for koji production
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- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/58—Reaction vessels connected in series or in parallel
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- C12M27/02—Stirrer or mobile mixing elements
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- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/16—Screw conveyor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
本发明适用于有机废弃物资源化利用设备领域，提供了一种连续式干法厌氧—好氧双级耦合发酵系统，包括进料模块、干法厌氧反应模块、出料模块和好氧反应模块，进料和出料模块均是由两段螺旋与中空管组合搭配连接，中空管中随时保留一定高度发酵物料，出料模块将厌氧反应模块和好氧反应模块串联。本发明的双极耦合发酵系统，适用的发酵物料含固率可以达到20‑40％，与中空管设计相配合，实现高含固率农业废弃物的(干法)连续式进料出料，又能动态密封等要求。厌氧反应模块和好氧反应模块的串联，既保证厌氧发酵模块的密封连续式出料功能，同时又完成好氧发酵连续式进料，实现可根据气肥产品要求，动态调节双极发酵过程的功能。
The present invention is applicable to the field of organic waste resource utilization equipment, and provides a continuous dry anaerobic-aerobic two-stage coupled fermentation system, including a feeding module, a dry anaerobic reaction module, a discharging module and an aerobic reaction module. The feeding and discharging modules are connected by a combination of two sections of spirals and a hollow tube, and a certain height of fermented materials is retained in the hollow tube at any time. The discharging module connects the anaerobic reaction module and the aerobic reaction module in series. The bipolar coupled fermentation system of the present invention can be applied to a fermentation material with a solid content of up to 20-40%, which is matched with the hollow tube design to achieve (dry) continuous feeding and discharging of agricultural waste with high solid content, and can also meet the requirements of dynamic sealing. The series connection of the anaerobic reaction module and the aerobic reaction module not only ensures the sealing and continuous discharging function of the anaerobic fermentation module, but also completes the continuous feeding of aerobic fermentation, and realizes the function of dynamically adjusting the bipolar fermentation process according to the requirements of the gas fertilizer product.
Description
Technical Field
The invention belongs to the field of organic waste recycling equipment, and particularly relates to a continuous dry anaerobic-aerobic double-stage coupled fermentation system.
Background
In recent years, with the continuous development of seed and raising industry, the yield of straw and livestock manure is increased year by year, and the problems of serious environmental pollution, natural ecological deterioration and the like are increasingly prominent because most of agricultural wastes are not well treated and utilized due to the limitations of factors such as single technology, lack of equipment and the like.
The anaerobic fermentation technology can reduce and harmlessly convert the wastes such as straw, excrement and the like into clean energy and organic fertilizer primary raw materials, is one of the common technologies for recycling agricultural wastes, and is divided into wet anaerobic fermentation (TS is less than or equal to 12%) and dry anaerobic fermentation (dry fermentation for short) according to the solid content (TS) of the materials in the reactor, wherein TS is more than or equal to 20). Compared with the wet fermentation technology, the dry fermentation technology has the advantages of high volume gas production rate, small occupied area, stable operation process, no problems of scum, precipitation and the like in the wet process, low water demand or no water demand, water resource saving, less biogas slurry generation, low water content of waste residues, low subsequent treatment cost and the like, and is increasingly favored by the market.
Currently, in the aspect of dry fermentation, development work of anaerobic fermentation technology and equipment has been carried out in European countries and China. The European dry fermentation is mainly based on a German garage type dry anaerobic technology, china mainly comprises a horizontal baffling type dry anaerobic fermentation reaction device disclosed in a patent CN 102242052B, a garage type anaerobic fermentation reactor disclosed in a patent CN 206768095U, a stirrer for dry anaerobic fermentation provided in a patent CN 209816130U and the like, and is mainly based on a batch type fermentation mode, and the patent is respectively researched from the aspects of a fermentation tank structure, a stirring shaft design and the like.
According to the research on dry fermentation engineering with high solid content, the research discovers that batch dry fermentation and continuous output of waste are contradictory and cannot meet the requirements, the closed environment in a reactor is easy to damage in the continuous feeding and discharging process, the fermentation is failed, in addition, the continuous dry fermentation with high solid content has poor flowability and difficult feeding and discharging, the problem that the conversion rate and the efficiency are low only through anaerobic fermentation treatment of agricultural waste are solved, the biogas residue generated by the anaerobic fermentation is always abandoned at present, but contains rich nitrogen, phosphorus, potassium and other nutrient elements, the comprehensive utilization of the biogas residue has the problems of difficult dehydration, high transfer and transfer cost and the like, and no system for integrally completing the dry anaerobic fermentation and the aerobic fermentation and simultaneously completing the production of organic fertilizer is available at present.
Therefore, a new technical solution is needed in the prior art to solve the difficulty of recycling agricultural wastes in the actual process.
Disclosure of Invention
In order to solve the technical problems, the invention provides a continuous dry anaerobic-aerobic double-stage coupling fermentation system which structurally adopts a sectional spiral structure and is suitable for continuous feeding and discharging of high-solid-content waste, the spiral structure is connected with a hollow pipe and matched with materials with certain solid content to realize synchronous sealing and linkage adjustment, the spiral structure is matched with the hollow pipe to realize double-stage coupling connection of a dry anaerobic fermentation tank and an aerobic fermentation tank, the sealing environment of the anaerobic fermentation tank is not damaged, continuous, stable and efficient gas production is realized, and meanwhile, anaerobic gas production and aerobic fertilizer production anaerobic gas fertilizer co-production fermentation treatment can be carried out on materials, so that the utilization rate of the materials is greatly improved, and the environmental pollution is reduced.
The invention is realized by the following technical scheme:
The anaerobic and aerobic continuous fermentation can be carried out, the material inlet and outlet are convenient, the sealing effect is good, the working procedure operation is convenient, the operation of frequently removing oxygen from the anaerobic fermentation tank is not needed, the sealing state of a material channel can be checked in the material transmission process, the fermentation process parameters can be calculated according to the material condition of the hollow pipe, and in addition, the anaerobic and aerobic separate fermentation can be carried out on the material, so that the utilization rate and the production efficiency of the material are improved, and the environmental pollution is reduced.
The invention is realized in such a way that a continuous dry anaerobic-aerobic double-stage coupled fermentation system comprises a first feeding screw, a first hollow pipe, a second feeding screw, a dry anaerobic reaction module, a first material conveying screw, a second hollow pipe, a second material conveying screw and an aerobic reaction module;
The first feeding screw comprises a first feeding cylinder, a first feeding shaft and a feeding hopper, wherein the first feeding shaft is arranged inside the first feeding cylinder, the first feeding shaft and the first feeding cylinder are coaxially arranged, the top of one end of the first feeding cylinder is provided with the feeding hopper, and the bottom of the other end of the first feeding cylinder is provided with the first hollow pipe which is vertically arranged;
the second feeding screw comprises a second feeding cylinder and a second feeding shaft, the top of one end of the second feeding cylinder is provided with a feeding hole, the feeding hole is communicated with the first feeding cylinder through the first hollow pipe, the second feeding shaft is arranged in the second feeding cylinder, the second feeding shaft and the second feeding cylinder are coaxially arranged, and the lower surface of the upper end of the second feeding cylinder is provided with a discharging hole;
the dry anaerobic reaction module comprises an anaerobic fermentation tank and an anaerobic tank discharging pipe, the top of the anaerobic fermentation tank is connected with the discharging hole of the second feeding barrel, and the bottom of the anaerobic fermentation tank is connected with one anaerobic tank discharging pipe;
the first material conveying spiral comprises a first material conveying cylinder and a first material conveying shaft, wherein the first material conveying cylinder is obliquely arranged, the upper surface of the lower end of the first material conveying cylinder is provided with a feeding hole, the feeding hole is communicated with the anaerobic tank discharging pipe through the anaerobic tank discharging pipe, the first material conveying shaft is arranged inside the first material conveying cylinder, the first material conveying shaft and the first material conveying cylinder are coaxially arranged, the upper end of the lower surface of the first material conveying cylinder is connected with a second hollow pipe, and the second hollow pipe is vertically arranged;
The second material conveying spiral comprises a second material conveying cylinder and a second material conveying shaft, the second material conveying cylinder is obliquely arranged, the upper surface of the lower end of the second material conveying cylinder is provided with a material inlet, the material inlet is communicated with the first material conveying cylinder through the second hollow pipe, the second material conveying shaft is arranged in the second material conveying cylinder, the second material conveying shaft and the second material conveying cylinder are coaxially arranged, and the lower surface of the upper end of the second material conveying cylinder is provided with a material outlet;
The aerobic reaction module comprises an aerobic fermentation tank and an aerobic tank discharging pipe, the top of the aerobic fermentation tank is connected with the discharging hole of the second material conveying cylinder, the bottom of the aerobic fermentation tank is connected with one aerobic tank discharging pipe, and the aerobic tank discharging pipe is provided with a valve;
The anaerobic fermentation tank is characterized in that a first pressure relief valve is arranged at the upper end of the anaerobic fermentation tank, and a second pressure relief valve is arranged at the upper end of the aerobic fermentation tank.
Preferably, one end of the first feeding shaft, one end of the second feeding shaft, one end of the first feeding shaft and one end of the second feeding shaft are respectively and fixedly connected with an output end of a driving motor.
Preferably, a first stirring shaft is arranged in the anaerobic fermentation tank, one end of the first stirring shaft extends out of the top of the anaerobic fermentation tank and is fixedly connected with the output end of a first stirring motor, and a first helical blade is fixed on the outer wall of the first stirring shaft.
Preferably, a second stirring shaft is arranged in the aerobic fermentation tank, one end of the second stirring shaft extends out from the top of the aerobic fermentation tank and is fixedly connected with the output end of a second stirring motor, and a second helical blade is fixed on the outer wall of the second stirring shaft.
Preferably, the first hollow tube and the second hollow tube are made of transparent toughened glass materials.
Preferably, the first hollow tube and the second hollow tube are both provided with height scales.
Preferably, the first hollow tube is provided with a first bin wall vibrator, and the second hollow tube is provided with a second bin wall vibrator.
Preferably, the anaerobic fermentation tank is communicated with the discharge port of the second feeding cylinder through an anaerobic tank feeding pipe, and the aerobic fermentation tank is communicated with the discharge port of the second feeding cylinder through an aerobic tank feeding pipe. The anaerobic tank feeding pipe and the aerobic tank feeding pipe are both provided with one-way valves, each one-way valve comprises a valve seat corresponding to the feeding pipe, a ball valve propped against the lower side of the valve seat, and a spring connected with the ball valve and fixed on a corresponding feeding pipe orifice.
Preferably, the first hollow pipe, the first feeding cylinder and the second feeding cylinder, the second hollow pipe, the first feeding cylinder and the second feeding cylinder can be welded and fixed together in a connecting mode, and also can be connected through bolts, a sealing gasket is installed at the connecting position to play a sealing role, and the first hollow pipe or the second hollow pipe can be spliced in sections, so that the length of the hollow pipe can be adjusted more flexibly through the section splicing, and the use of different processes and the installation construction of various scenes are facilitated.
Compared with the prior art, the continuous dry anaerobic-aerobic double-stage coupled fermentation system has the beneficial effects that materials are input and output through the spiral feeding module and the feeding and discharging module, the spiral feeding module and the feeding and discharging module are connected through the hollow pipes adopted between the two sections of spirals, the hollow pipes are reserved with a certain height of materials at any time, and the characteristics that the water content of the fermentation materials is about 60% -80% are utilized to be matched with the special design of the hollow pipes in the feeding and discharging module, so that the requirements of continuous feeding and sealing are met. The anaerobic reaction module and the aerobic reaction module are connected in series through the first discharging screw, the second hollow pipe and the second feeding screw, so that the closed continuous discharging function of the anaerobic fermentation module is ensured, the continuous feeding of aerobic fermentation is finished, and the function of dynamically adjusting the two-stage fermentation process according to the requirements of gas fertilizer products is realized. The system can realize continuous fermentation, has good sealing performance and high treatment efficiency, can dynamically adjust the two-stage fermentation effect, is convenient to use, and solves the problems of poor sealing performance of continuous fermentation, low efficiency of single-stage fermentation, waste of biogas residue resources and the like.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a continuous dry anaerobic-aerobic double-stage coupled fermentation system of the present invention;
fig. 2 is an enlarged schematic view of detail a in fig. 1.
In the figure:
The device comprises a feed hopper 11, a first feeding cylinder 12, a first feeding shaft 13, a first hollow pipe 14, a first bin wall vibrator 141, a second feeding cylinder 15, a second feeding shaft 16, an anaerobic fermentation tank 21, an anaerobic tank discharging pipe 22, an anaerobic tank feeding pipe 23, a first stirring motor 24, a first pressure relief valve 211, a first stirring shaft 25, a first spiral blade 26, a first feeding cylinder 31, a first feeding shaft 32, a second hollow pipe 33, a second bin wall vibrator 331, a second feeding cylinder 34, a second feeding shaft 35, an aerobic tank 41, an aerobic tank discharging pipe 42, an aerobic tank feeding pipe 43, an aerobic tank feeding pipe 44, a second stirring motor 411, a second stirring shaft 45, a second spiral blade 421, a valve 5, a one-way valve 51, a valve seat 52, a ball valve 53 and a spring.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to FIGS. 1-2, the invention provides a technical scheme that a continuous dry anaerobic-aerobic double-stage coupled fermentation system comprises a first feeding screw, a second feeding screw, a dry anaerobic reaction module, a first feeding screw, a second feeding screw and an aerobic reaction module.
The first feeding screw comprises a first feeding barrel 12, a first feeding shaft 13, a feeding hopper 11 and a first hollow tube 14, wherein the first feeding shaft 13 is installed inside the first feeding barrel 12, the first feeding shaft 13 and the first feeding barrel 12 are coaxially arranged, the top of one end of the first feeding barrel 12 is provided with the feeding hopper 11, the bottom of the other end of the first feeding barrel 12 is provided with the first hollow tube 14 which is vertically arranged, and the outer wall of the first hollow tube 14 is provided with the first bin wall vibrator 141.
The second feeding screw comprises a second feeding cylinder 15 and a second feeding shaft 16, the top of one end of the second feeding cylinder 15 is provided with a feeding hole, the feeding hole is communicated with the first feeding cylinder 12 through the first hollow pipe 14, the second feeding shaft 16 is arranged in the second feeding cylinder 15, and the second feeding shaft 16 and the second feeding cylinder 15 are coaxially arranged.
The dry anaerobic reaction module comprises an anaerobic fermentation tank 21 and an anaerobic tank discharging pipe 22, the top of the anaerobic fermentation tank 21 is connected with the discharging hole of the second feeding barrel 15, and the bottom of the anaerobic fermentation tank 21 is connected with the anaerobic tank discharging pipe 22.
The first material conveying spiral comprises a first material conveying cylinder 31, a first material conveying shaft 32 and a second hollow tube 33, wherein the first material conveying cylinder 31 is obliquely arranged, the upper surface of the lower end of the first material conveying cylinder 31 is provided with a feed inlet, the feed inlet is communicated with the anaerobic fermentation tank 21 through the anaerobic tank discharging tube 22, the first material conveying shaft 32 is arranged inside the first material conveying cylinder 31, the first material conveying shaft 32 and the first material conveying cylinder 31 are coaxially arranged, the upper end of the lower surface of the first material conveying cylinder 31 is connected with a second hollow tube 33, the second hollow tube 33 is vertically arranged, and the outer wall of the second hollow tube 33 is provided with a second bin wall vibrator 331.
The second material conveying spiral comprises a second material conveying barrel 34 and a second material conveying shaft 35, the second material conveying barrel 34 is obliquely arranged, the upper surface of the lower end of the second material conveying barrel 34 is provided with a feeding hole, the feeding hole is communicated with the first material conveying barrel 31 through a second hollow pipe 33, the second material conveying shaft 35 is arranged in the second material conveying barrel 34, and the second material conveying shaft 35 and the second material conveying barrel 34 are coaxially arranged.
The aerobic reaction module comprises an aerobic fermentation tank 41 and an aerobic tank discharging pipe 42, the top of the aerobic fermentation tank 41 is connected with the discharging hole of the second material conveying cylinder 34, the bottom of the aerobic fermentation tank 41 is connected with the aerobic tank discharging pipe 42, and the aerobic tank discharging pipe is provided with a valve 421.
In the present embodiment, the first feeding cylinder 12 and the second feeding cylinder 15 are disposed obliquely, and the second feeding cylinder 15 is located below the first feeding cylinder 12. The first hollow tube 14 and the second hollow tube 33 are vertically arranged. The first hollow tube 14 has both ends connected to the first and second feed cylinders 12 and 15 by welding. The two ends of the second hollow tube 33 are connected with the first feed cylinder 31 and the second feed cylinder 34 by welding. The feed hopper 11 is used for a user to throw in materials to be fermented, the materials enter the first feed cylinder 12, the first hollow pipe 14 for conveying the materials when the first feed shaft 13 rotates, then enter the second feed cylinder 15, the materials are conveyed into the anaerobic fermentation tank 21 when the second feed shaft 16 rotates, after the materials are subjected to anaerobic fermentation in the anaerobic fermentation tank 21, the materials are conveyed from the first feed cylinder 31 to the second hollow pipe 33 through the first feed shaft 32, the materials in the second hollow pipe 33 flow into the second feed cylinder 34, and the materials are conveyed into the aerobic fermentation tank 41 when the second feed shaft 35 rotates. After the fermentation in the aerobic fermentation tank 41 is completed, the fermented material passes through the discharge pipe 42 of the aerobic tank, and the valve 421 is opened to discharge the fermented organic fertilizer. In the fermentation process, materials with a certain height are kept in the first hollow pipe 14 and the second hollow pipe 33 at any time, the direct communication between the first feeding cylinder 12, the second feeding cylinder 34 and the anaerobic fermentation tank 21 is blocked, air is prevented from entering the anaerobic fermentation tank, and the dynamic sealing of matching of the materials and the hollow pipes is realized. In other embodiments, the first feeding screw 1, the second feeding screw 2, the first feeding screw 4, the second feeding screw 5 may take other forms of conveying means. And the top wall in the anaerobic fermentation tank 21 can be provided with a material level measuring instrument for detecting the height of the material, so that a user can conveniently obtain the height of the material in the anaerobic fermentation tank 21 in real time. In other embodiments, 1-2 observation windows may be provided on the anaerobic fermentation tank 21 for a user to observe the material height.
Further, one end of the first feeding shaft 13, one end of the second feeding shaft 16, one end of the first feeding shaft 32 and one end of the second feeding shaft 35 are respectively and fixedly connected with an output end of a driving motor.
In the present embodiment, one driving motor is mounted to each end of the first feed cylinder 12, the second feed cylinder 15, the first feed cylinder 31 and the second feed cylinder 34, the driving motor is used for driving the first feed shaft 13, the second feed shaft 16, the first feed shaft 32 and the second feed shaft 35 to rotate, and the driving motor is connected to an external power source.
Further, a first stirring shaft 25 is installed in the anaerobic fermentation tank 21, one end of the first stirring shaft 25 extends out from the top of the anaerobic fermentation tank 21 and is fixedly connected with the output end of a first stirring motor 24, and a first helical blade 26 is fixed on the outer wall of the first stirring shaft 25.
Further, a second stirring shaft 45 is installed in the aerobic fermentation tank 41, one end of the second stirring shaft 45 extends out from the top of the aerobic fermentation tank 41 and is fixedly connected with the output end of a second stirring motor 44, and a second helical blade 46 is fixed on the outer wall of the second stirring shaft 45.
In this embodiment, the first stirring motor 24 is used for driving the first stirring shaft 25 to rotate, the first stirring shaft 25 stirs the material in the anaerobic fermentation tank 21 through the first helical blade 26 to improve the fermentation effect, and the first stirring motor 24 is connected with an external power supply. The second stirring motor 44 is used for driving the second stirring shaft 45 to rotate, the second stirring shaft 45 stirs the materials in the aerobic fermentation tank 41 through the second helical blade 46 to improve the fermentation effect, and the second stirring motor 44 is connected with an external power supply.
Further, the first hollow tube 14 and the second hollow tube 33 are made of transparent tempered glass materials.
In this embodiment, the first hollow tube 14 and the second hollow tube 33 made of tempered glass material are stable in structure, good in light transmission effect, and convenient for a user to observe the material state.
Further, the first hollow tube 14 and the second hollow tube 33 are provided with height scales, so that an operator can observe the height of the hollow tube, thereby providing convenience for optimizing and researching the process, and other various automatic height detection devices, such as an infrared height detection device, can be installed.
Further, the first hollow tube 14 has a first wall vibrator 141 on the outer wall thereof, and the second hollow tube 33 has a second wall vibrator 331 thereon. The wall vibrator is a general energy-saving product with a vibration motor as an excitation source, and effectively eliminates the phenomena of bridging, arching, blocking and the like caused by internal friction, deliquescence, electrification, component segregation and the like by high-frequency vibration and impact force, so that materials are smoothly discharged from a bin opening, and one of necessary equipment for stable feeding is ensured. The bin material vibrator is used for enabling solid or semi-solid raw materials not to be easily hung on a wall, improving density of settled materials and improving air tightness.
Further, the anaerobic fermentation tank 21 is communicated with the discharge port of the second feeding cylinder 15 through an anaerobic tank feeding pipe 23, materials can enter the anaerobic fermentation tank 21 through the anaerobic tank feeding pipe 23, the aerobic fermentation tank 41 is communicated with the discharge port of the second feeding cylinder 34 through an aerobic tank feeding pipe 43, and materials can enter the aerobic fermentation tank 41 through the aerobic tank feeding pipe 43. The feeding pipe can facilitate the disassembly and assembly of the whole dry continuous fermentation device, and can also be provided with other devices such as a switch valve, thereby facilitating the later optimization and improvement of the device.
Further, the anaerobic fermentation tank 21 is communicated with the discharge port of the second feeding cylinder 15 through an anaerobic tank feeding pipe 23, and the aerobic fermentation tank 41 is communicated with the discharge port of the second feeding cylinder 34 through an aerobic tank feeding pipe 43. The anaerobic tank feeding pipe 23 and the aerobic tank feeding pipe 43 are respectively provided with a one-way valve 5, and the one-way valve 5 comprises a valve seat 51 corresponding to the feeding pipe, a ball valve 52 propped against the lower side of the valve seat and a spring 53 connected with the ball valve 52 and fixed on a corresponding feeding pipe orifice.
In this embodiment, the check valve 5 prevents the gas in the fermentation tank, whether the aerobic fermentation tank 41 or the anaerobic fermentation tank 21, from flowing into the corresponding hollow pipe, in addition, the check valve 5 can adjust the pressure of the outlets of the second feeding cylinder 15 and the second feeding cylinder 34 through the adjusting spring 53, and by increasing the pressure of the outlets of the second feeding cylinder 15 and the second feeding cylinder 34, the density of the materials in the second feeding cylinder 15 and the second feeding cylinder 34 is improved, the air tightness is improved, the pressure of the spring is adjustable, the optimization of different material processes is facilitated, the different solid contents use the elasticity of different springs, the rotation speeds of the second feeding shaft 16 and the second feeding shaft 35 are matched, and the fermentation equipment is more convenient to use.
Further, the first hollow tube 14, the first feeding cylinder 12 and the second feeding cylinder 15, the second hollow tube 33, the first feeding cylinder 31 and the second feeding cylinder 34 can be welded and fixed together, and also can be connected through bolts, the sealing gasket is installed at the connecting position to play a sealing role, and the first hollow tube 14 or the second hollow tube 33 can be spliced in sections, so that the length of the hollow tube can be adjusted more flexibly by the section splicing, and the use of different processes and the installation construction of various scenes are facilitated.
After the invention is installed, the raw materials are pretreated, so that the water content of the fermentation materials reaches 60% -80%. The user drops into feeder hopper 11 with the material that waits to ferment, and the material gets into first feed cylinder 12, in the first hollow tube 14 with the material transfer when first feed shaft 13 is rotatory, then gets into second feed cylinder 15, in the second feed shaft 16 is rotatory with the material transfer anaerobic fermentation jar 21, after the material carries out anaerobic fermentation in anaerobic fermentation jar 21, anaerobic fermentation jar 21 when the first fermentation need pass through the deoxidization gas operation, follow-up will not need to carry out research and development fermentation jar 21 again in the material fermentation of same batch and remove the operation of oxygen. The material is conveyed from the first material conveying cylinder 31 to the second hollow tube 33 through the first material conveying shaft 32, the material in the second hollow tube 33 flows into the second material conveying cylinder 34, when the second material conveying shaft 35 rotates, the material is conveyed into the aerobic fermentation tank 41, the fermentation of the aerobic fermentation tank 41 is completed, the fermented material passes through the aerobic tank discharging tube 42, and the valve 421 is opened to discharge waste.
The double-stage coupling fermentation system provided by the invention can perform dry anaerobic-aerobic double-stage continuous fermentation, the material feeding and discharging are convenient, and in the process of material transmission, the aerobic fermentation tank 21 can be always in a sealed state in the process of material feeding and discharging and can continuously feed and discharge, so that the fermentation efficiency and the material utilization rate are greatly improved. The first pressure release valve 211 can release pressure when the air pressure of the anaerobic fermentation tank 21 is too high, and the second pressure release valve 411 can release pressure when the air pressure of the aerobic fermentation tank 41 is too high, so that the device operation is safer.
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", "axial", "radial", "circumferential", 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 being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A continuous dry anaerobic-aerobic double-stage coupled fermentation system is characterized by comprising a feeding module, a dry anaerobic reaction module, a discharging module and an aerobic reaction module;
the feeding module comprises a first feeding screw, a first hollow tube and a second feeding screw;
The first feeding screw is arranged in the first feeding cylinder through a first feeding shaft, the first feeding shaft and the first feeding cylinder are coaxially arranged, a feeding hopper is arranged at the top of one end of the first feeding cylinder, and the bottom of the other end of the first feeding cylinder is connected with the first hollow pipe which is vertically arranged;
The second feeding screw comprises a second feeding cylinder and a second feeding shaft, one end top of the second feeding cylinder is provided with a feeding hole, the feeding hole is communicated with the first feeding cylinder through the first hollow pipe, the second feeding shaft is arranged in the second feeding cylinder, the second feeding shaft and the second feeding cylinder are coaxially arranged, and the lower surface of the upper end of the second feeding cylinder is provided with a discharging hole;
the dry anaerobic reaction module comprises an anaerobic fermentation tank and an anaerobic tank discharging pipe, the top of the anaerobic fermentation tank is connected with the discharging hole of the second feeding barrel, and the bottom of the anaerobic fermentation tank is connected with one anaerobic tank discharging pipe;
the discharging module comprises a first material conveying screw, a second hollow pipe and a second material conveying screw;
The first material conveying spiral comprises a first material conveying cylinder and a first material conveying shaft, wherein the upper surface of the lower end of the first material conveying cylinder is provided with a feed inlet, the feed inlet is communicated with the anaerobic tank discharge pipe through the anaerobic tank discharge pipe, the first material conveying shaft is arranged inside the first material conveying cylinder, the first material conveying shaft and the first material conveying cylinder are coaxially arranged, and the upper end of the lower surface of the first material conveying cylinder is connected with a second hollow pipe which is vertically arranged;
The second material conveying spiral comprises a second material conveying cylinder and a second material conveying shaft, the upper surface of the lower end of the second material conveying cylinder is provided with a material inlet, the material inlet is communicated with the first material conveying cylinder through the second hollow pipe, the second material conveying shaft is arranged in the second material conveying cylinder, the second material conveying shaft and the second material conveying cylinder are coaxially arranged, and the lower surface of the upper end of the second material conveying cylinder is provided with a material outlet;
The aerobic reaction module comprises an aerobic fermentation tank and an aerobic tank discharging pipe, the top of the aerobic fermentation tank is connected with the discharging hole of the second material conveying cylinder, the bottom of the aerobic fermentation tank is connected with one aerobic tank discharging pipe, and the aerobic tank discharging pipe is provided with a valve;
And the aerobic fermentation tank and the anaerobic fermentation tank are respectively provided with a pressure release valve.
2. The anaerobic-aerobic double-stage coupled fermentation system of claim 1, wherein one end of the first feeding shaft, one end of the second feeding shaft, one end of the first feeding shaft and one end of the second feeding shaft are respectively and fixedly connected with an output end of a driving motor.
3. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 1, wherein a first stirring shaft is arranged in the anaerobic fermentation tank, one end of the first stirring shaft extends out of the top of the anaerobic fermentation tank and is fixedly connected with an output end of a first stirring motor, and a first helical blade is fixed on the outer wall of the first stirring shaft.
4. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 1, wherein a second stirring shaft is arranged in the aerobic fermentation tank, one end of the second stirring shaft extends out from the top of the aerobic fermentation tank and is fixedly connected with the output end of a second stirring motor, and a second helical blade is fixed on the outer wall of the second stirring shaft.
5. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 1, wherein the first hollow tube and the second hollow tube are made of transparent toughened glass material.
6. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 5, wherein the first hollow tube and the second hollow tube are provided with height scales.
7. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 6, wherein the first hollow tube and the second hollow tube are provided with a wall vibrator.
8. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 1, wherein the anaerobic fermentation tank is communicated with the discharge port of the second feeding cylinder through an anaerobic tank feeding pipe, and the aerobic fermentation tank is communicated with the discharge port of the second feeding cylinder through an aerobic tank feeding pipe.
9. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 8, wherein the anaerobic tank feed pipe and the aerobic tank feed pipe are respectively provided with a one-way valve, the one-way valve comprises a valve seat arranged on the corresponding feed pipe, a ball valve propped against the lower side of the valve seat, and a spring connected with the ball valve and fixed on the corresponding feed pipe orifice.
10. The continuous dry anaerobic-aerobic double-stage coupled fermentation system of claim 1, wherein the first feeding screw, the first hollow tube and the second feeding screw are connected in a welding manner, and the first feeding screw, the second hollow tube and the second feeding screw are connected in a welding manner.
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| CN113788717A (en) * | 2021-09-16 | 2021-12-14 | 南宁市博发科技有限公司 | A device for producing organic fertilizer by anaerobic synchronous fermentation of cow dung and other wastes |
| CN114164085A (en) * | 2021-12-01 | 2022-03-11 | 上海坚蚕环境科技有限公司 | A process system for combined anaerobic and aerobic fermentation |
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