Dry anaerobic fermentation reactor

Abstract

The invention discloses a dry anaerobic fermentation reactor, and belongs to the technical field of anaerobic fermentation. One end of the fermentation bin is connected with a feeding assembly, the other end of the fermentation bin is connected with a discharging assembly, and an air outlet is formed in the top of the fermentation bin; the double-layer hollow shell is filled with a polyurethane thermal insulation material; a heating cavity is formed in the outer side of the inner wall; a plurality of plug flow assemblies are arranged in the fermentation bin at intervals; an angle pushing assembly is arranged on the inner edge of the fermentation bin; a plurality of liquid accumulation grooves are formed in the inner bottom of the fermentation bin at intervals. The device is suitable for dry anaerobic fermentation operation; the raw material adaptability is wide, the total solid content of the raw materials is high, and the problem that a large amount of biogas slurry cannot be treated is solved; and moreover, the heat-preservation energy consumption is low, the operation cost is reduced, and the method can be widely applied to treatment of organic wastes such as agricultural wastes and household garbage.

Description

Technical Field

[0001] The invention relates to the technical field of anaerobic fermentation, in particular to a dry anaerobic fermentation reactor. Background Art

[0002] As a large agricultural country, my country has a rich variety of agricultural waste and a considerable amount of resources. However, every year a huge amount of straw, crop stems and leaves are abandoned or burned; at the same time, a large amount of livestock and poultry manure from the breeding industry has not been effectively utilized; this has not only caused environmental pollution problems, but also caused a large amount of resource waste.

[0003] In recent years, the use of anaerobic fermentation technology to treat agricultural waste has made certain progress; it uses agricultural waste as raw materials, not only to generate biogas, but the resulting biogas residue can also be used for composting or as a soil conditioner, thus realizing resource utilization again.

[0004] At present, in the technologies disclosed in the market, dry anaerobic fermentation equipment still has some shortcomings. For example, the material pushing inside has low forward efficiency and poor mixing effect, and the material in some positions cannot even be effectively mixed; the internal temperature control is not timely and difficult to adjust; it is difficult to grasp the internal fermentation situation in time; it is impossible to control the fermentation stage of different areas; and so on. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose a dry anaerobic fermentation reactor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The dry anaerobic fermentation reactor comprises a fermentation bin connected to a feed assembly at one end and a discharge assembly at the other end, and an air outlet is arranged on the top, wherein the fermentation bin is provided with: a double-layer hollow shell composed of an inner wall and an outer wall; the double-layer hollow shell is filled with polyurethane insulation material; and a heating chamber is arranged on the outer side of the inner wall;

[0008] A plurality of flow-pushing components are arranged at intervals in the fermentation bin;

[0009] A corner push assembly is provided at the inner edge of the fermentation bin;

[0010] The inner bottom of the fermentation bin is provided with a plurality of liquid storage tanks at intervals.

[0011] In some embodiments, the cross-section of the heating chamber is a U-shaped structure, covering the bottom and most of the two side walls of the fermentation bin;

[0012] The heating chamber is provided with a plurality of heating bodies and is filled with heat transfer oil.

[0013] In some embodiments, the flow pushing assembly includes: an external power motor, a main shaft drivingly connected to the output shaft of the power motor, and a pusher wheel mounted on the main shaft;

[0014] The pusher wheel is composed of a plurality of circumferentially arranged buckets, radial rods connecting the buckets with the main shaft, and a ring fixed on the outer ring side of the buckets.

[0015] In some embodiments, a plurality of pusher wheels are disposed on each of the main shafts; and the buckets of adjacent pusher wheels are staggered from each other.

[0016] In some embodiments, the bucket includes: a bottom surface, a side surface and a rear baffle; the opening of the bucket faces the push flow direction; during the rotation operation, the push wheel pushes the material upward and forward;

[0017] The radial rods are symmetrically arranged on both sides of the rear end of the bucket, and rails are arranged on the opposite sides of the two radial rods; the rear baffle is mounted in the rails and slides; when the push wheel rotates, the rear baffle moves in the rails under the action of gravity.

[0018] A cross reinforcement strip is arranged at the rear end of the rail.

[0019] In some embodiments, the corner push assembly is driven to reciprocate by a power screw arranged along the push flow direction; when moving forward, the corner push assembly pushes the material forward; when moving backward, the corner push assembly avoids the material;

[0020] The corner push assemblies are provided with two at the inner bottom edge of the fermentation bin; or, two are provided at the inner bottom edge and two are provided at the inner top edge of the fermentation bin.

[0021] In some embodiments, the corner push assembly includes: a scraper fitted with the inner bottom edge, a bracket arranged at the middle position of the inner side of the scraper, a threaded cylinder fixedly arranged at the top end of the bracket, and two swing plates symmetrically hinged on the bracket; a stop edge is arranged at the rear side of the bracket to limit the swing plate from rotating backward;

[0022] The support comprises: a central partition plate which is fixedly connected to the scraper and extends along the flow direction, and a top beam which is arranged perpendicular to the central partition plate.

[0023] In some embodiments, the liquid accumulation tank is extended perpendicular to the flow direction; a filter screen is provided on the top of the liquid accumulation tank, and a drainage pipe is connected to the lower end; the drainage pipe pumps the accumulated liquid to the dispersion pipe provided on the top of the fermentation bin through an extraction pump; and a downward outlet is provided on the dispersion pipe;

[0024] Wherein, the drainage tube is arranged in a double-layer hollow shell.

[0025] In some embodiments, the feeding assembly includes: a storage tank and a screw conveyor; the storage tank temporarily stores materials, and the materials are fed into the fermentation bin from the upper side via the screw conveyor to maintain the sealing of the fermentation bin;

[0026] The discharging assembly comprises: a vacuum tank and a solid-liquid separator which are arranged in sequence; the material is sucked out by forming negative pressure by vacuum, and the solid-liquid separator is used to separate the biogas residue and the biogas liquid, and part of the biogas liquid is transported to the storage tank;

[0027] The gas outlets are arranged in a plurality along the flow direction and are respectively provided with an opening and closing valve and a flow meter; after the plurality of gas outlets are gathered together, they are sequentially connected to a dehydration tank and a desulfurization tank to output the biogas to the outside.

[0028] In some embodiments, the fermentation bin is provided with a plurality of sampling ports on its side; the plurality of sampling ports have corresponding areas with different material depths and forward positions;

[0029] A flange is provided at the end of the sampling port;

[0030] A sampling tube is inserted into the sampling port; a flange ring is sleeved on the outside of the sampling tube and connected with the flange plate of the sampling port.

[0031] In some embodiments, a spiral auger is inserted into the interior of the sampling barrel, a cone head is provided at the front end of the spiral auger, and the rear end of the cone head cooperates with the front end of the sampling barrel to form a blockage;

[0032] The rear end of the spiral auger is provided with a sealing plate;

[0033] The rear end of the sealing plate is provided with a handle plate extending to the outside;

[0034] The sampling tube is provided with a sample outlet at a lower position near the tail end; the front end of the sealing plate is fixedly connected with an inner ring that matches the inner wall of the sampling tube;

[0035] Before sampling: the spiral auger moves outward, and the rear end of the cone head presses against the front end of the sampling tube to form a blockage; at this time, the inner ring is located at the rear end and is separated from the sample outlet, and the sample outlet is in an open state;

[0036] During sampling, first adjust the sampling barrel to an appropriate depth and fix it; then, apply force to the handle to push the spiral auger inward; at this time, the cone head moves forward to open the front end of the sampling barrel; at the same time, the inner ring corresponds to the sample outlet to form a seal; operate the spiral auger to rotate and transport an appropriate amount of material to the outside; then, pull the spiral auger outward, the cone head again forms a seal on the front end of the sampling barrel, the sample outlet is open, and the spiral auger is rotated again to discharge the material from the sample outlet.

[0037] Compared with the prior art, the present invention provides a dry anaerobic fermentation reactor having the following beneficial effects.

[0038] 1. The present invention is suitable for dry anaerobic fermentation operations; the raw materials have wide adaptability (various crop straws, weeds, livestock manure, etc. can be used); at the same time, the total solid content of the raw materials is high, which avoids the problem of large-scale production of biogas slurry that cannot be treated; and the heat preservation energy consumption is low, which reduces the operating cost, and can be widely used in the treatment of organic waste such as agricultural waste and domestic garbage.

[0039] 2. The present invention, through the design of a horizontal fermentation bin, combines mechanical push flow components, corner push components and other components to achieve orderly advancement of materials in different areas, accurately match the needs of each fermentation stage, allow microorganisms to work efficiently in a suitable environment, and greatly improve fermentation efficiency; the zoned temperature control of the heating chamber and the double-layer hollow shell insulation design not only meet the strict temperature requirements of microorganisms at different stages, but also reduce heat loss, with significant energy-saving effects.

[0040] 3. The present invention has correspondingly designed feeding, discharging and gas treatment components to ensure that the entire process is closed and smooth, reduce the risk of pollution caused by contact between materials and the outside world, and ensure fermentation stability; in addition, the convenient sampling and dosing devices facilitate real-time monitoring and regulation of the fermentation process; the present invention has advantages in the field of resource utilization of organic waste, provides strong support for the coordinated development of agriculture and environmental protection industries, and has broad market application prospects.

[0041] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a state schematic diagram of the present invention.

[0043] Figure 2 It is a schematic diagram of the structure of the discharging side of the present invention.

[0044] Figure 3 It is a schematic diagram of the feed side structure of the present invention.

[0045] Figure 4 It is a front side cross-sectional structural schematic diagram of the present invention.

[0046] Figure 5 It is a front sectional view of the present invention.

[0047] Figure 6 It is a schematic diagram of the top cross-sectional structure of the present invention.

[0048] Figure 7 It is a top cross-sectional plan view of the present invention.

[0049] Figure 8 It is a side sectional structural schematic diagram of the present invention.

[0050] Fig. 9 It is a side sectional front view of the present invention.

[0051] Fig.10 It is a schematic diagram of a partial top cross-sectional structure of the present invention.

[0052] Fig.11 It is a partial top cutaway plan view of the present invention.

[0053] Fig.12 It is a structural diagram of the streaming component.

[0054] Fig.13 It is a schematic diagram of the side structure of the flow-pushing component.

[0055] Fig.14 It is a schematic diagram of the end face structure of the flow-pushing component.

[0056] Fig.15 The structure of the push wheel is shown in Figure 1. Figure 1 .

[0057] Fig.16 The structure of the push wheel is shown in Figure 1. Figure 2 .

[0058] Fig.17 Schematic diagram of the moving state of the tailgate.

[0059] Fig.18 Schematic diagram of the bucket structure.

[0060] Fig.19 It is a partial structural schematic diagram of the corner push assembly.

[0061] Fig. 20 It is a structural schematic diagram of the corner push assembly.

[0062] Fig.21 Schematic diagram of the unfolded state of the swing plate.

[0063] Fig. 22 It is a partial structural diagram of the sampling port and sampling tube.

[0064] Fig.23 It is a schematic diagram of the structure of the flange ring.

[0065] Fig.24 It is a schematic diagram of the lower structure of the sampling port and sampling tube.

[0066] Fig.25 A partial cross-sectional view of the sampling tube Figure 1 .

[0067] Fig.26A partial cross-sectional view of the sampling tube Figure 2 .

[0068] Fig. 27 Schematic diagram of the explosion state of the sampling port and sampling tube.

[0069] In the figure:

[0070] 1. Fermentation chamber; 11. Inner wall; 12. Outer wall; 13. Heating chamber; 2. Flow-pushing assembly; 21. Power motor; 22. Main shaft; 3. Angle push assembly; 31. Power screw rod; 32. Scraper; 33. Bracket; 34. Threaded barrel; 35. Swing plate; 36. Guard edge; 331. Center partition plate; 332. Top beam; 4. Liquid sump; 5. Push wheel; 51. Bucket; 52. Radial rod; 53. Ring; 54. Rail; 7. Rear baffle; 8. Sampling port; 81. Flange; 9. Sampling barrel; 90. Flange ring; 91. Screw auger; 92. Cone head; 93. Closing plate; 94. Handle plate; 95. Sample outlet; 96. Inner ring. DETAILED DESCRIPTION

[0071] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0072] Reference Figure 1-27 The dry anaerobic fermentation reactor comprises a fermentation chamber 1 with one end connected to a feed assembly, the other end connected to a discharge assembly, and an air outlet arranged on the top.

[0073] The fermentation bin 1 is a horizontal rectangular parallelepiped body as the main body of the entire anaerobic fermentation reaction, and should have a suitable length so that the material can complete the entire fermentation process inside the fermentation bin 1 under the condition of continuous feeding.

[0074] It is understandable that the fermentation reaction has multiple stages; by setting up mechanical plug flow in the fermentation bin 1 and controlling the feeding time and feeding amount, the materials at different plug flow forward positions are in different fermentation stages.

[0075] Generally, dry anaerobic fermentation goes through the following stages in sequence;

[0076] Hydrolysis stage: Hydrolysis is the first step of dry anaerobic fermentation. Complex organic substances such as cellulose, hemicellulose and protein are broken down into simpler molecules such as sugars, amino acids and other low molecular weight organic substances by hydrolytic enzymes at this stage. This stage is dominated by mesophilic or thermophilic bacteria.

[0077] Acidification stage (acidogenic fermentation): In this stage, the simple molecules produced by hydrolysis are further converted by fermentative bacteria into volatile fatty acids (VFAs), alcohols, carbon dioxide (CO 2 ) and hydrogen (H 2 ). This step is crucial for subsequent methane production;

[0078] Acetogenesis stage: some volatile fatty acids are converted into acetic acid by specific microbial communities; acetic acid is not only an important precursor for methane production, but its concentration also has a great influence on the pH value of the entire fermentation process;

[0079] Methanogenesis stage: The last stage is performed by methanogens; these obligate anaerobic microorganisms convert acetate directly into methane and carbon dioxide, or synthesize methane by utilizing hydrogen and carbon dioxide; this stage requires a strictly anaerobic environment and is very sensitive to factors such as temperature and pH.

[0080] There are certain differences in the main microorganisms and the corresponding environment in each stage; by setting up the fermentation bin 1 in conjunction with mechanical flow, the material located at a fixed position in the fermentation bin 1 is basically in a fixed fermentation stage, and the environment of the fermentation bin 1 in this area can be controlled accordingly, so as to be better applied to dry anaerobic fermentation operations.

[0081] It should be noted that the materials for dry anaerobic fermentation include livestock and poultry manure, weeds, straw, etc., which can be fed directly or mixed in any proportion; preferably, the material feeding of the fermentation bin 1 is controlled by controlling the solid content, moisture content, and C / N value to obtain a more efficient fermentation basis.

[0082] The solid content of the material is controlled at 20% to 40%; the material in the fermentation bin 1 is highly solid, and a high solid content is a feature of dry anaerobic fermentation, which helps to reduce the volume and cost of subsequent biogas residue treatment; when the solid content is lower than 20%, the fermentation process is closer to wet anaerobic fermentation, and loses the advantages of dry fermentation (such as reducing the amount of sewage generated, etc.); and when the solid content is higher than 40%, the fluidity of the material is poor, which will affect the fermentation efficiency. For example, when processing a mixture of crop straw and livestock and poultry manure, keeping the solid content at 25%-36% can make the material structure relatively loose, which is conducive to the escape of gas and the activity of microorganisms.

[0083] The moisture content of the material is directly related to the solid content and is controlled at 60%-80%. The appropriate moisture content is essential for maintaining the living environment of microorganisms. If the moisture content is too low, the metabolic activity of microorganisms will be inhibited because many biochemical reactions need to be carried out in a water environment (for example, hydrolases need to be in aqueous solution to work and decompose large organic molecules into small molecules). When the moisture content is too high, it will cause material dilution, reduce the concentration of organic matter per unit volume, and increase the difficulty of subsequent treatment of the sludge.

[0084] The C / N value of the material is controlled at 20-30:1; carbon is the energy source of microorganisms, and nitrogen is an important element for microorganisms to synthesize cellular substances; when the C / N value is too high, that is, there are too many carbon sources, the nitrogen element is relatively insufficient, which will lead to slow growth of microorganisms and prolonged fermentation process; for example, when straw is used alone for anaerobic fermentation, due to the high C / N value of straw (generally 30-100:1), the fermentation efficiency is low, and it is necessary to add high-nitrogen substances such as livestock and poultry manure to adjust the C / N value; on the contrary, when the C / N value is too low, that is, there are too many nitrogen sources, a large amount of ammonia nitrogen will be produced, which may cause the pH value of the fermentation system to increase, inhibit the activity of methanogens, and reduce methane production.

[0085] Since fermentation tank 1 is horizontal fermentation, it occupies the largest area under the same tank capacity, but has the highest efficiency. Due to the high concentration of materials and the reliance on mechanical force for pushing and mixing, the energy consumption is relatively high; however, the heating energy consumption is the lowest and the fermentation efficiency is also the highest.

[0086] In some embodiments, the fermentation bin 1 is provided with: a double-layer hollow shell consisting of an inner wall 11 and an outer wall 12; the double-layer hollow shell is filled with polyurethane insulation material; by forming a reliable insulation layer, energy consumption can be saved, and the internal environment can be adjusted more quickly and efficiently.

[0087] Furthermore, a heating chamber 13 is disposed on the outer side of the inner wall 11 to provide a heating environment.

[0088] It should be noted that the heating chamber 13 is divided into a plurality of mutually unconnected sections in the direction of flow advancement, so as to correspond to the positions of different fermentation stages respectively, so as to form the temperature most suitable for the stage; it can be understood that the temperature of each section of the heating chamber 13 is independently regulated.

[0089] Preferably, the cross-section of the heating chamber 13 is a U-shaped structure, covering the bottom and most of the two side walls of the fermentation bin 1.

[0090] It is understandable that the interior of the fermentation bin 1 is not completely filled, and there will be a certain amount of empty space at the top; and, under natural conditions, the temperature below the material is higher than that above; the top of the heating chamber 13 is controlled to be flush with or slightly lower than the height of the material, forming a lower temperature at the top; combined with other internal components, it is more conducive to temperature regulation.

[0091] Furthermore, a plurality of heating bodies are arranged inside the heating chamber 13 and filled with heat transfer oil.

[0092] Preferably, the heating body is in the form of an electric heating rod, or a hot water pipe connected to an external high-temperature hot water supply.

[0093] In some embodiments, Figure 1 As shown; the feeding assembly includes: a storage tank and a screw conveyor; the storage tank temporarily stores materials, and the materials are fed into the fermentation bin 1 from the upper side via the screw conveyor to maintain the sealing of the fermentation bin 1.

[0094] The discharging assembly includes: a vacuum tank and a solid-liquid separator which are arranged in sequence; the vacuum is used to form negative pressure to suck out the material, the solid-liquid separator is used to separate the biogas residue and the biogas liquid, and part of the biogas liquid is transported to the storage tank.

[0095] Furthermore, multiple gas outlets are arranged along the flow direction, and are respectively provided with opening and closing valves and flow meters; after the multiple gas outlets are gathered together, they are connected to the dehydration tank and the desulfurization tank in sequence to output the biogas to the outside.

[0096] It should be noted that the gas outlets correspond to the regional positions of several different fermentation stages, and the gas flow in each area is monitored by a flow meter. In theory, the flow in each area should be in a relatively stable range. When the flow data in a certain area deviates from the corresponding relationship with the flow data in other areas, it is necessary to focus on inspection to find the problem.

[0097] Furthermore, a drug injection port is provided on the side or top surface of the fermentation bin 1 to add appropriate microbial agents, pH regulators, etc. to the areas corresponding to different fermentation stages.

[0098] It is understandable that the dosing port is closed under normal conditions; preferably, the dosing port is directly connected to the medicine bin and a valve is provided to prevent the fermentation bin 1 from being connected to the outside when dosing.

[0099] Optionally, an external discharge port is provided at the lower end of the fermentation bin 1. An inspection port is provided at the side or top.

[0100] In some embodiments, a plurality of flow-pushing components 2 are arranged at intervals in the fermentation bin 1 to push the material to gradually move forward, reach different areas in sequence, and finally be discharged outward.

[0101] Specifically, Figures 6 to 9 As shown; the flow pushing component 2 includes: an external power motor 21, a main shaft 22 drivingly connected to the output shaft of the power motor 21, and a pusher wheel 5 assembled on the main shaft 22.

[0102] It can be understood that, in order to match the horizontal shape of the fermentation bin 1, the flow plugging assembly 2 is provided with multiple flow plugging components along the flow plugging direction; Figure 7 As shown, four flow-pushing components 2 are provided; it should be noted that the areas corresponding to each flow-pushing component 2 do not need to be consistent, and each flow-pushing component 2 is independently controlled, and its operation mode is also independent, so as to be applied to different fermentation stages; for example, if a faster hybrid power is required at a certain stage, the operation speed of the flow-pushing component 2 corresponding to the area is increased accordingly.

[0103] Furthermore, the pusher wheel 5 is composed of: a plurality of circumferentially arranged buckets 51 , radial rods 52 connecting the buckets 51 and the main shaft 22 , and a ring 53 fixed on the outer ring side of the buckets 51 .

[0104] The opening of the bucket 51 faces the direction of the push flow; during operation, the bucket 51 pushes the materials at the rear forward.

[0105] like Figures 14 to 16 As shown, multiple groups of radial rods 52 are arranged around the main shaft 22; the rear end of the bucket 51 is fixed on the radial rod 52; the ring 53 arranged on the outer ring side connects the multiple buckets 51 into one, thereby improving the overall strength and bearing capacity.

[0106] In some embodiments, a plurality of pusher wheels 5 are disposed on each main shaft 22 ; the buckets 51 of adjacent pusher wheels 5 are staggered from each other.

[0107] Thus, spaces are formed between the buckets 51, which can reduce the running resistance of the pusher wheel 5; and, with more dispersed pushing surfaces, the stirring effect is also more excellent.

[0108] It is understandable that the push wheel 5 is in rotation operation, and each bucket 51 generates a digging force; but inevitably, the bucket 51 will send the material in the front to the rear while transporting the material in the rear to the front; for example, when a bucket 51 is in the front position and horizontal state, it continues to rotate counterclockwise, which will send the material in the bucket backward; thus, a circular moving area is formed, and the material circulates in this area, resulting in poor pushing flow effect and a large amount of energy waste.

[0109] In addition, the rear stop surface of the bucket 51 cannot be directly connected to the main shaft 22 to form a rear closed state; otherwise, the material near the main shaft 22 will accumulate and only rotate without being transported forward.

[0110] Although the buckets 51 of adjacent pusher wheels 5 are staggered, which is an improvement, the pushing effect is still poor. Therefore, the present application provides a further solution.

[0111] What is different from the above-mentioned embodiment is that the bucket 51 includes a bottom surface, side surfaces and a movable rear baffle 7; when rotating, the rear baffle 7 cooperates with the push wheel 5 to push the material upward and forward, and reduces the backward pushing of the material.

[0112] Specifically, the radial rods 52 are symmetrically arranged on both sides of the rear end of the bucket 51, and rails 54 are arranged on the opposite sides of the two radial rods 52; the rear baffle 7 is mounted in the rails 54 and slides; when the push wheel 5 rotates, the rear baffle 7 moves in the rails 54 under the action of gravity.

[0113] like Figures 15 to 18 As shown; under the action of gravity, when a bucket 51 moves from a horizontal position to a lower position, the rear baffle 7 moves toward the outer ring direction; at this time, the bucket 51 cooperates to push the material at the rear end forward; when the bucket 51 reaches the horizontal position in the front and gradually moves upward, the center of gravity of the rear baffle 7 changes, and the rear baffle 7 moves toward the direction close to the main shaft 22, and the bucket 51 does not form a thrust to prevent the material from being pushed backward; of course, at this time, the rear baffle 7 is close to the main shaft 22, and it will still form a certain backward pushing effect, but it is much lighter, and the moving coverage area is also reduced a lot.

[0114] Furthermore, a cross reinforcement strip is provided at the rear end of the rail 54 , which significantly improves the overall strength, avoids the load deformation of the radial rod 52 , and improves the stability of the movement of the rear baffle 7 .

[0115] It should be noted that, since the material is in a highly solid state, in order to facilitate the movement of the rear baffle 7 by gravity, a weight may be added to the rear end of the rear baffle 7 .

[0116] Furthermore, a locking member for pressing the rear baffle 7 is provided; for example, a pressure rod / block / strip etc. passing through the rail 54 for pressing the rear baffle 7; thereby, the rear baffle 7 is fixed to adapt to different requirements; for example, when enhanced stirring is required, the position of the rear baffle 7 is locked at the outer ring position.

[0117] It is understandable that the locking member uses an electronic control component with its own battery to achieve adjustment at any time.

[0118] Furthermore, the position of the rear baffle 7 is adjusted by a push rod.

[0119] Among them, the push rod is electric, has its own battery, and is controlled by remote control; thus, the position of the rear baffle 7 can be adjusted more freely and flexibly to form more diverse forms to adapt to different stirring, mixing, and flow pushing combination requirements.

[0120] In some embodiments, a corner push assembly 3 is provided at the inner edge of the fermentation bin 1 to enable pushing of materials at the corners.

[0121] Among them, two corner push components 3 are arranged at the inner bottom edge of the fermentation bin 1; or, two are arranged at the inner bottom edge and the inner top edge of the fermentation bin 1 respectively.

[0122] In some embodiments, the angle push assembly 3 is driven to reciprocate by a power screw 31 arranged along the push flow direction; and, when moving forward, the angle push assembly 3 pushes the material forward; when moving backward, the angle push assembly 3 avoids the material.

[0123] Specifically, the corner push assembly 3 includes: a scraper 32 that fits the inner bottom edge, a bracket 33 arranged at the middle position inside the scraper 32, a threaded cylinder 34 fixedly arranged on the top of the bracket 33, and two swing plates 35 symmetrically hinged on the bracket 33.

[0124] In addition, a stopper edge 36 is provided on the rear side of the bracket 33 to limit the swing plate 35 from rotating backward.

[0125] When moving forward along the push flow direction, the swing plate 35 is blocked by the stop edge 36 to form a thrust surface to transport the material forward; when returning backward, the swing plate 35 is impacted by the material and swings open, pushing the material backward very little.

[0126] Furthermore, the front and rear ends of the scraper 32 are in an arc shape, which can reduce the resistance of movement.

[0127] It can be understood that the power screw 31 cooperates with the threaded barrel 34; the power screw 31 reciprocates in forward and reverse directions to drive the angle push assembly 3 forward or backward.

[0128] Furthermore, the support 33 includes: a central partition plate 331 fixedly connected to the scraper 32 and extending along the flow direction, and a top beam 332 arranged perpendicular to the central partition plate 331 .

[0129] The front and rear ends of the central partition plate 331 are arc surfaces, forming a cutting shape during movement.

[0130] In some embodiments, a plurality of liquid storage tanks 4 are arranged at intervals on the inner bottom of the fermentation bin 1 .

[0131] Among them, the liquid accumulation tank 4 is extended perpendicular to the flow direction; a filter is arranged on the top of the liquid accumulation tank 4, and a drainage pipe is connected to the lower end; the drainage pipe pumps the accumulated liquid to the dispersion pipe arranged on the top of the fermentation bin 1 through an extraction pump; a downward outlet is opened on the dispersion pipe.

[0132] Thus, the filtrate at the bottom is pumped to the top to form a circulation, which can speed up the fermentation efficiency.

[0133] Among them, the drainage pipe is arranged in the double-layer hollow shell to avoid large temperature changes caused by external pipe routing.

[0134] The dispersion pipe may be in the form of a straight pipe, a curved pipe, etc., so as to achieve relatively uniform liquid distribution.

[0135] Preferably, all the drainage pipes are connected to a surrounding coil disposed on the top of the fermentation bin 1 to mix the filtrates of each stage, thereby screening out a mixed bacterial flora more suitable for each stage.

[0136] In some embodiments, a plurality of sampling ports 8 are provided on the side of the fermentation chamber 1 .

[0137] Among them, the plurality of sampling ports 8 correspond to areas with different material depths and forward positions, so as to perform corresponding sampling respectively.

[0138] Preferably, a flange 81 is provided at the end of the sampling port 8 ; a sampling tube 9 is inserted into the sampling port 8 ; and a flange ring 90 is sleeved on the outside of the sampling tube 9 and connected to the flange 81 of the sampling port 8 .

[0139] Similarly, when the sampling tube 9 is not provided, the end of the sampling port 8 is provided with a blind plate in cooperation with the flange 81 to form a seal.

[0140] In some embodiments, a spiral auger 91 is inserted into the interior of the sampling tube 9, and a cone head 92 is provided at the front end of the spiral auger 91. The rear end of the cone head 92 cooperates with the front end of the sampling tube 9 to form a blockage.

[0141] Furthermore, a sealing plate 93 is provided at the rear end of the spiral auger 91; a handle plate 94 extending to the outside is provided at the rear end of the sealing plate 93; at the same time, a sample outlet 95 is provided at the lower position of the sampling tube 9 near the tail end; an inner ring 96 that cooperates with the inner wall of the sampling tube 9 is fixedly connected to the front end of the sealing plate 93.

[0142] Before sampling, the spiral auger 91 moves outward, and the rear end of the cone head 92 presses against the front end of the sampling tube 9 to form a blockage; at this time, the inner ring 96 is located at the rear end and is separated from the sample outlet 95, and the sample outlet 95 is in an open state.

[0143] During sampling, first adjust the sampling tube 9 to an appropriate depth and fix it; then, apply force to the handle plate 94 to push the spiral auger 91 inward; at this time, the cone head 92 moves forward to open the front end of the sampling tube 9; at the same time, the inner ring 96 corresponds to the sample outlet 95 to form a blockage; operate the spiral auger 91 to rotate and transport an appropriate amount of material to the outer end; then, pull the spiral auger 91 outward, the cone head 92 again forms a blockage on the front end of the sampling tube 9, and the sample outlet 95 is open, and the spiral auger 91 is rotated again to discharge the material from the sample outlet 95.

[0144] It is understandable that the present invention can use a DCS programmable logic control system to control various components and equipment; it has a high degree of automation and can achieve simple operation and unattended operation. A project of our company has set up 7 horizontal push flow anaerobic reaction fermentation tanks, each of which is 45 meters long, 6 meters wide, and 7 meters high, with an effective volume of 1600m 3 , polyurethane insulation 100mm, stable and efficient output.

[0145] When the present application is used, the material to be added is fed into the storage tank of the feed component; the feeding time and the addition amount are controlled and fed into the fermentation bin 1 through a screw conveyor; the fermentation bin 1 adjusts and controls the heating environment through a double-layer hollow shell and a heating chamber 13; the material is pushed forward by the flow push component 2 and the corner push component 3; during the fermentation process, part of the filtrate is pumped to the top and then sprinkled down for circulation; after sufficient fermentation reaction, the material is discharged through the negative pressure of the vacuum tank, and the sludge and liquid biogas are separated by a solid-liquid separator; the gas is drawn out through the gas outlet.

[0146] The present application is applicable to dry anaerobic fermentation operations; the raw materials have wide adaptability (various crop straws, weeds, livestock manure, etc. can be used); at the same time, the total solid content of the raw materials is high, which avoids the problem of large-scale production of biogas slurry that cannot be treated; and the insulation energy consumption is low, which reduces the operating cost, and can be widely used in the treatment of organic waste such as agricultural waste and domestic waste.

[0147] In the present invention, through the design of a horizontal fermentation bin, combined with components such as mechanical flow-pushing components and corner push components, the orderly advancement of materials in different areas is achieved, the requirements of each fermentation stage are accurately matched, the microorganisms can work efficiently in a suitable environment, and the fermentation efficiency is greatly improved; the zoned temperature control of the heating chamber and the double-layer hollow shell insulation design not only meet the strict temperature requirements of microorganisms at different stages, but also reduce heat loss, and the energy-saving effect is significant; the correspondingly designed feeding, discharging and gas treatment components ensure that the entire process is closed and smooth, reduce the pollution risk caused by contact between materials and the outside world, and ensure fermentation stability; in addition, the convenient sampling and dosing device facilitates real-time monitoring and regulation of the fermentation process; the present invention has advantages in the field of resource utilization of organic waste, provides strong support for the coordinated development of agriculture and environmental protection industries, and has broad market application prospects.

[0148] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dry anaerobic fermentation reactor, comprising a fermentation chamber (1) with one end connected to a feed assembly, the other end connected to a discharge assembly, and a gas outlet arranged on the top, characterized in that: The fermentation bin (1) is provided with: a double-layer hollow shell consisting of an inner wall (11) and an outer wall (12); the double-layer hollow shell is filled with polyurethane insulation material; and a heating chamber (13) is provided on the outer side of the inner wall (11); A plurality of flow-pushing components (2) are arranged at intervals in the fermentation bin (1); A corner push assembly (3) is provided at the inner edge of the fermentation bin (1); The inner bottom of the fermentation bin (1) is provided with a plurality of liquid storage tanks (4) at intervals.

2. The dry anaerobic fermentation reactor according to claim 1, characterized in that: The cross section of the heating chamber (13) is a U-shaped structure, covering the bottom and most of the two side walls of the fermentation bin (1); The heating chamber (13) is provided with a plurality of heating bodies inside and is filled with heat transfer oil.

3. The dry anaerobic fermentation reactor according to claim 1, characterized in that: The flow pushing component (2) comprises: an external power motor (21), a main shaft (22) drivingly connected to the output shaft of the power motor (21), and a pushing wheel (5) mounted on the main shaft (22); The pusher wheel (5) is composed of a plurality of circumferentially arranged buckets (51), radial rods (52) connecting the buckets (51) and the main shaft (22), and a ring (53) fixed on the outer ring side of the buckets (51).

4. The dry anaerobic fermentation reactor according to claim 3, characterized in that: A plurality of pusher wheels (5) are arranged on each main shaft (22); the buckets (51) of adjacent pusher wheels (5) are staggered in position.

5. The dry anaerobic fermentation reactor according to claim 3, characterized in that: The bucket (51) comprises: a bottom surface, side surfaces and a rear baffle (7); the opening of the bucket (51) faces the direction of the push flow; when rotating, the push wheel (5) pushes the material upward and forward; The radial rods (52) are symmetrically arranged on both sides of the rear end of the bucket (51), and rails (54) are arranged on the opposite sides of the two radial rods (52); the rear baffle (7) is mounted in the rails (54) to slide; when the push wheel (5) rotates, the rear baffle (7) moves in the rails (54) under the action of gravity.

6. The dry anaerobic fermentation reactor according to claim 1, characterized in that: The angle push assembly (3) is driven to reciprocate by a power screw (31) arranged along the push flow direction; when moving forward, the angle push assembly (3) pushes the material forward; when moving backward, the angle push assembly (3) avoids the material; Two of the corner push assemblies (3) are arranged at the inner bottom edge of the fermentation bin (1); or two are arranged at the inner bottom edge and two are arranged at the inner top edge of the fermentation bin (1).

7. The dry anaerobic fermentation reactor according to claim 1 or 6, characterized in that: The corner push assembly (3) comprises: a scraper (32) fitted with the inner bottom edge, a bracket (33) arranged at the middle position inside the scraper (32), a threaded cylinder (34) fixedly arranged at the top end of the bracket (33), and two swing plates (35) symmetrically hinged on the bracket (33); The rear side of the bracket (33) is provided with a stop edge (36) for limiting the swing plate (35) from rotating backwards; The support (33) comprises: a central partition plate (331) fixedly connected to the scraper (32) and extending along the flow direction, and a top beam (332) arranged perpendicular to the central partition plate (331).

8. The dry anaerobic fermentation reactor according to claim 1, characterized in that: The liquid accumulation tank (4) is arranged to extend perpendicularly to the flow direction; a filter screen is arranged at the top of the liquid accumulation tank (4), and a drainage pipe is connected to the lower end; the drainage pipe pumps the accumulated liquid to the dispersion pipe arranged at the top of the fermentation bin (1) through an extraction pump; and a downward outlet is opened on the dispersion pipe.

9. The dry anaerobic fermentation reactor according to claim 1, characterized in that: The fermentation bin (1) is provided with a plurality of sampling ports (8) on its side; the plurality of sampling ports (8) are located in areas corresponding to different material depths and flow advancement positions; A flange (81) is provided at the end of the sampling port (8); A sampling tube (9) is inserted into the sampling port (8); a flange ring (90) is sleeved on the outside of the sampling tube (9) and connected to the flange plate (81) of the sampling port (8).

10. The dry anaerobic fermentation reactor according to claim 9, characterized in that: A spiral auger (91) is inserted into the interior of the sampling tube (9), a cone head (92) is provided at the front end of the spiral auger (91), and the rear end of the cone head (92) cooperates with the front end of the sampling tube (9) to form a blockage; The rear end of the spiral auger (91) is provided with a sealing plate (93); the sampling tube (9) is provided with a sample outlet (95) at a position below the rear end; the front end of the sealing plate (93) is fixedly connected with an inner ring (96) that cooperates with the inner wall of the sampling tube (9).

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