Rural breeding wastewater fermentation system

Abstract

The invention relates to a rural cultivation wastewater fermentation system, and belongs to the field of wastewater treatment equipment, the rural cultivation wastewater fermentation system comprises solid-liquid separation equipment and a fermentation tank, a compost fermentation chamber is arranged above the fermentation tank, and the compost fermentation chamber is provided with a feed port and a discharge port; a liquid outlet of the solid-liquid separation equipment is communicated with the fermentation tank, and a solid outlet of the solid-liquid separation equipment is communicated with the feeding hole; a heating mechanism is arranged in the fermentation tank, a heat exchange pipe is arranged in the compost fermentation chamber, an inlet of the heat exchange pipe is connected with a liquid outlet of the solid-liquid separation equipment through a flow control valve, and an outlet of the heat exchange pipe is connected with the fermentation tank; and the temperature sensor and the flow control valve are connected with the controller. According to the invention, after solid-liquid separation is carried out on rural cultivation wastewater, the wastewater is introduced into the fermentation tank for anaerobic fermentation, so that biogas can be generated; solid excrement, straw residues and the like enter the composting fermentation chamber and are subjected to composting fermentation, so that organic fertilizer can be obtained, and simultaneous fermentation of wastewater and solid wastes is realized.

Description

Technical Field

[0001] The invention belongs to the field of wastewater treatment equipment, in particular to a rural aquaculture wastewater fermentation system. Background Art

[0002] Rural aquaculture wastewater contains a large amount of livestock manure, urine, straw residues, etc., which are rich in organic matter and nutrients such as nitrogen and phosphorus. If discharged directly, it will seriously pollute the surrounding environment and cause waste of resources.

[0003] The invention patent with application number CN202210282547.X discloses a livestock and poultry wastewater fermentation and sterilization system, which includes an anaerobic fermentation module, a chemical sterilization module, a solid-liquid separation module, a physical sterilization module, a detection module and a central control module. After the wastewater is separated by solid-liquid separation module, the upper wastewater is fermented. The system only ferments the wastewater, and does not ferment the separated solid impurities. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a rural aquaculture wastewater fermentation system, which can not only ferment the wastewater, but also ferment the solid impurities in the wastewater at the same time.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a rural aquaculture wastewater fermentation system, including a solid-liquid separation device and a fermentation tank, A compost fermentation chamber is arranged above the fermentation tank, a feed inlet is arranged at one end of the compost fermentation chamber, a discharge port is arranged at the other end, and a feeding mechanism is arranged in the compost fermentation chamber; the liquid outlet of the solid-liquid separation device is connected to the fermentation tank, and the solid outlet of the solid-liquid separation device is connected to the feed inlet; A heating mechanism is provided in the fermentation tank, a plurality of heat exchange tubes are provided in the compost fermentation chamber, a temperature sensor is provided on the outer wall of the heat exchange tube, the inlet of the heat exchange tube is connected to the liquid outlet of the solid-liquid separation device through a flow control valve, the outlet of the heat exchange tube is connected to the fermentation tank, and the inlet of the heat exchange tube is higher than the outlet of the heat exchange tube; the temperature sensor and the flow control valve are both connected to the controller.

[0006] Furthermore, the solid-liquid separation equipment includes a horizontally arranged separation cylinder, a feed bin is arranged on the top of one end of the separation cylinder, a dehydration cylinder is arranged on the other end, a plurality of drainage holes are arranged on the cylinder walls of the dehydration cylinder and the separation cylinder, the solid outlet is arranged at the end of the dehydration cylinder, and the inner diameter of the dehydration cylinder gradually decreases in the direction toward the solid outlet; a liquid collecting tank is arranged below the dehydration cylinder and the separation cylinder, the liquid collecting tank is connected to the fermentation tank through a liquid infusion pipe, and a flow control valve is arranged at the bottom of the liquid collecting tank; a conveying shaft is arranged inside the separation cylinder, a spiral conveying sheet is fixedly arranged on the outer wall of the conveying shaft, and a conveying motor is connected to one end of the conveying shaft.

[0007] Furthermore, an inclined conveying trough is arranged below the solid outlet, and the lower end of the conveying trough is connected to the feed end of the compost fermentation chamber. A scraper is arranged inside the feed end of the compost fermentation chamber, and the scraper is connected to a scraper driving mechanism that drives the scraper to reciprocate linear motion.

[0008] Furthermore, the feed end of the composting fermentation chamber is provided with two supporting rails and a material height detection mechanism, the supporting rail is provided with a slide seat slidably matched with the supporting rail, the scraper driving mechanism includes a screw and a scraper motor, the screw rod passes through the slide seat and is threadedly matched with the slide seat, and one end of the screw rod is connected to the scraper motor; mounting shafts are fixedly provided at both ends of the scraper, the mounting shafts are rotatably mounted on the slide seat, and the mounting shafts are connected to the adjusting motor; a cavity is provided in the scraper, and a plurality of feeding holes connected to the cavity are provided on one side of the scraper, the cavity is connected with a hose, and the hose is sequentially connected with a lime delivery mechanism and an air supply mechanism; the lime delivery mechanism, the air supply mechanism, the material height detection mechanism, the scraper motor and the adjusting motor are all connected to a controller.

[0009] Furthermore, the bottom wall of the compost fermentation chamber is inclined, and the feed port is higher than the discharge port, and an insulation plate parallel to the bottom wall is arranged in the compost fermentation chamber, and the insulation plate, the bottom wall of the compost fermentation chamber and the two side walls of the compost fermentation chamber form a fermentation chamber; a plurality of strip holes are arranged on the insulation plate, and the length direction of the strip holes is perpendicular to the moving direction of the material, and the feeding mechanism comprises a rotating shaft arranged in each strip hole, one end of the rotating shaft is connected to a feeding motor, and guide columns perpendicular to the rotating shaft are fixedly arranged at both ends of the rotating shaft, a sliding sleeve that slidably cooperates with the guide column is arranged on the guide column, a lifting plate is fixedly arranged on the sliding sleeve, a rectangular through hole is arranged on the rotating shaft, the lower end of the lifting plate passes through the rectangular through hole and extends into the fermentation chamber, and a plurality of pushing plates are connected to the lower end of the lifting plate, and there is a spacing between two adjacent pushing plates, and the heat exchange tube is located in the spacing between the pushing plates; the upper end of the lifting plate is connected to a lifting mechanism.

[0010] Furthermore, a drainage trough is provided on the bottom wall of the compost fermentation chamber, and a filter screen is provided at the notch of the drainage trough.

[0011] Furthermore, a sealing member is provided in the fermentation tank.

[0012] Furthermore, an aeration pipe is arranged at the bottom of the fermentation tank, an exhaust fan is arranged in the fermentation tank, the exhaust fan is connected to an exhaust pipe and an air return pipe, valves are arranged on the exhaust pipe and the air return pipe, and the air return pipe is connected to the aeration pipe.

[0013] The beneficial effects of the present invention are as follows: in the present invention, after the rural aquaculture wastewater is separated into solid and liquid, the wastewater is passed into a fermentation tank for anaerobic fermentation to produce biogas; and solid feces, straw residues, etc. enter a composting fermentation chamber, and after composting and fermentation, organic fertilizer can be obtained, thereby achieving simultaneous fermentation of wastewater and solid waste.

[0014] The present invention arranges the compost fermentation chamber above the fermentation tank, which fully utilizes the space and improves the utilization rate of the land.

[0015] During the composting fermentation process, the optimal fermentation temperature is usually between 50 and 70 degrees Celsius, but as the fermentation proceeds, the temperature will gradually increase. Excessive temperature will affect the decomposition of organic matter. Therefore, traditional composting fermentation requires multiple turning of the compost to appropriately cool down and improve the fermentation uniformity. However, turning the compost is more troublesome and labor-intensive. In the fermentation tank, the optimal fermentation temperature is about 35 degrees Celsius, and a heating mechanism is required to maintain the temperature of the fermentation tank, which has certain energy consumption. In the present invention, the heat exchange tube is buried in the solid fermentation pile, and the temperature in the fermentation pile is monitored in real time by a temperature sensor. When the temperature is too high, the flow control valve can be opened, and the wastewater separated by the solid-liquid separation device is transported to the heat exchange tube. The temperature of the wastewater is relatively low, and heat is exchanged with the fermentation pile, so that the temperature of the wastewater is increased and flows into the fermentation tank, while the temperature of the fermentation pile is reduced. The present invention can effectively maintain the temperature of the fermentation pile, prevent the temperature of the fermentation pile from being too high, and does not need to turn the compost, with low labor intensity, and can also use the heat generated by the fermentation pile to heat the wastewater, reducing the energy consumption of the heating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front cross-sectional schematic diagram of the present invention; Figure 2 yes Figure 1 A magnified schematic diagram of part A; Figure 3 yes Figure 2 Schematic diagram of the middle BB; Figure 4 is a schematic cross-sectional view of a scraper; Figure 5 yes Figure 1 Schematic diagram of CC; Figure numerals: 1—fermentation tank; 2—composting fermentation chamber; 3—heating mechanism; 4—flow control valve; 5—heat exchange tube; 6—temperature sensor; 7—controller; 8—separation cylinder; 9—feeding bin; 10—liquid collecting tank; 11—conveying shaft; 12—screw conveying sheet; 13—conveying motor; 14—dehydration cylinder; 15—conveying trough; 16—scraper; 17—scraper driving mechanism; 18—support rail; 19—slide seat; 20—installation shaft; 21—adjusting motor ; 22—cavity; 23—feeding hole; 24—hose; 25—air supply mechanism; 26—lime feeding mechanism; 27—material height detection mechanism; 28—insulation plate; 29—rotating shaft; 30—feeding motor; 31—guide column; 32—sleeve; 33—lifting plate; 34—lifting mechanism; 35—push plate; 37—drain trough; 38—filter screen; 39—seal; 40—aeration pipe; 41—exhaust fan; 42—exhaust pipe; 43—return air pipe. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] The rural aquaculture wastewater fermentation system of the present invention is as follows: Figures 1 to 5 As shown, it includes solid-liquid separation equipment and a fermentation tank 1.

[0019] Among them, the solid-liquid separation equipment is used to separate the solid and liquid of wastewater to obtain solid matter and wastewater. The solid matter is mainly livestock manure and straw residue, which can be composted and fermented.

[0020] The fermentation tank 1 is used for anaerobic fermentation of wastewater after solid-liquid separation to obtain biogas and liquid fertilizer. A composting fermentation chamber 2 is arranged above the fermentation tank 1, and the composting fermentation chamber 2 is used for composting and fermenting solid matter after solid-liquid separation, so as to obtain organic fertilizer. A feed port is arranged at one end of the composting fermentation chamber 2 for passing solid matter into the composting fermentation chamber 2, and a discharge port is arranged at the other end for discharging the fermented organic fertilizer. A feeding mechanism is arranged in the composting fermentation chamber 2 for pushing the fermentation pile toward the discharge port. The liquid outlet of the solid-liquid separation equipment is connected to the fermentation tank 1, and the solid outlet of the solid-liquid separation equipment is connected to the feed port. After the original wastewater from rural breeding is separated by the solid-liquid separation equipment, the solid matter directly enters the composting fermentation chamber 2, and the wastewater directly enters the fermentation tank 1.

[0021] A seal 39 is provided in the fermentation tank 1. The seal 39 can be a sealing plate to seal the fermentation tank 1 to prevent air from entering and affecting the anaerobic environment of the fermentation tank. At the same time, it prevents the leakage of biogas to cause waste and safety accidents. The biogas in the fermentation tank 1 can be discharged for use through the exhaust mechanism. Specifically, an exhaust fan 41 is provided in the fermentation tank 1, and the exhaust fan 41 can be used to discharge the biogas. Since anaerobic fermentation is carried out in the fermentation tank 1, the water body remains still and the fluctuation is small, and the biogas produced by anaerobic bacteria in the water body is difficult to be discharged in time. Therefore, the present invention is provided with an aeration pipe 40 at the bottom of the fermentation tank 1, and the exhaust fan 41 is connected to the exhaust pipe 42 and the return pipe 43. Valves are provided on the exhaust pipe 42 and the return pipe 43, and the return pipe 43 is connected to the aeration pipe 40. After the exhaust fan 41 is started, the biogas in the fermentation tank 1 can be transported to the exhaust pipe 42 and the return pipe 43. The exhaust pipe 42 is connected to a gas-using facility such as a storage tank or a stove, and the biogas can be transported to the storage tank or stove for storage or use. The return pipe 43 transports part of the biogas to the aeration pipe 40. The aeration pipe 40 is provided with a plurality of aeration holes. The biogas enters the water from the aeration holes and then flows upward, which can stir the water body and promote the rapid discharge of the biogas generated in the water body. In addition, in order to facilitate the growth of anaerobic bacteria, a polyurethane sponge filler can also be set in the fermentation tank 1, and the anaerobic bacteria can adhere to the polyurethane sponge filler.

[0022] A drainage pipe can be provided at the outlet end of the fermentation tank 1 to discharge the wastewater after fermentation, and the wastewater after fermentation can be used as liquid fertilizer. The fermentation tank 1 discharges biogas residue regularly, and the biogas residue can be added to the compost in the compost fermentation chamber 2 to adjust the moisture content and carbon-nitrogen ratio of the compost, and further utilize the rich nitrogen source in the biogas residue to improve the fertility of the compost product. The present invention adopts a closed-loop recycling process treatment method to fully utilize the resources in rural aquaculture wastewater and achieve waste-free treatment.

[0023] The present invention arranges the compost fermentation chamber 2 above the fermentation tank 1, which fully utilizes the space, reduces the overall floor space, and improves the utilization rate of the land.

[0024] In the fermentation tank 1, the optimal fermentation temperature is about 35 degrees Celsius, but under natural conditions, the temperature of wastewater is difficult to reach 35 degrees Celsius. Therefore, a heating mechanism 3 is provided in the fermentation tank 1, and the heating mechanism 3 can be various existing electric heating mechanisms. In order to accurately control the temperature in the fermentation tank 1, a temperature detection element can also be provided in the fermentation tank 1. The temperature detection element and the heating mechanism 3 are both connected to a controller 7. The controller 7 automatically controls the operation of the heating mechanism 3 according to the detection result of the temperature detection element, so that the temperature in the fermentation tank 1 is stably maintained within a set range.

[0025] During the composting fermentation process, the optimal fermentation temperature is usually between 50 and 70 degrees Celsius. As the fermentation proceeds, the temperature in the fermentation pile will gradually rise to more than 70 degrees Celsius. Too high a temperature will reduce the decomposition efficiency of organic matter. Therefore, traditional composting fermentation requires multiple turning of the pile to appropriately cool down and improve the fermentation uniformity. However, turning the pile is more troublesome and labor-intensive. In the present invention, when the internal temperature of the fermentation pile is too high, in order to reduce the fermentation temperature, a plurality of heat exchange tubes 5 are arranged in the composting fermentation chamber 2. The heat exchange tubes 5 can be made of stainless steel tubes. During the composting fermentation, the heat exchange tubes 5 are covered by the fermentation pile. The outer wall of the heat exchange tube 5 is provided with a temperature sensor 6, and the temperature sensor 6 is used to detect the internal temperature of the fermentation pile. The inlet of the heat exchange tube 5 is connected to the liquid outlet of the solid-liquid separation device through the flow control valve 4, and the outlet of the heat exchange tube 5 is connected to the fermentation tank 1. The inlet of the heat exchange tube 5 is higher than the outlet of the heat exchange tube 5, so that the wastewater can automatically flow along the heat exchange tube 5, and there is no need to set power-consuming facilities such as water pumps, thereby reducing the energy consumption of system operation. The temperature sensor 6 and the flow control valve 4 are both connected to the controller 7. The temperature sensor 6 monitors the internal temperature of the fermentation pile in real time and transmits the detection signal to the controller 7. When the temperature value detected by the temperature sensor 6 is higher than the set temperature range, the controller 7 controls the flow control valve 4 to open, and the wastewater separated by the solid-liquid separation device can enter the heat exchange tube 5, so that the wastewater with a lower temperature exchanges heat with the fermentation pile, the temperature of the fermentation pile is reduced, and the temperature of the wastewater is increased. When the temperature of the fermentation pile returns to the set range, the controller 7 controls the flow control valve 4 to close and stops passing wastewater into the heat exchange tube 5. The present invention can not only control the internal temperature of the fermentation pile more accurately, but also recover the heat generated by the fermentation pile, reduce the energy consumption of the heating mechanism 3, and also does not need to turn the fermentation pile to cool it down, saving the labor required for turning the pile.

[0026] The solid-liquid separation equipment can adopt various existing filtering and separation equipment. Preferably, the solid-liquid separation equipment of the present invention includes a horizontally arranged separation cylinder 8, and a feed bin 9 is arranged on the top of one end of the separation cylinder 8. Rural breeding wastewater can be passed into the separation cylinder 8 through the feed bin 9. A dehydration cylinder 14 is arranged at the other end of the separation cylinder 8. The dehydration cylinder 14 is used to dehydrate the solid matter so that the water content of the solid matter is reduced to 60% to 70%, which is suitable for composting fermentation. The dehydration cylinder 14 can be welded to the separation cylinder 8. The cylinder walls of the dehydration cylinder 14 and the separation cylinder 8 are provided with a plurality of drainage holes. After the wastewater enters the separation cylinder 8 and the dehydration cylinder 14, the solid matter stays inside the separation cylinder 8 and the dehydration cylinder 14, and the wastewater is discharged through the drainage holes to achieve solid-liquid separation. The solid outlet is arranged at the end of the dehydration cylinder 14. The separation cylinder 8 is a circular cylinder, and the dehydration cylinder 14 is a conical cylinder. The inner diameter of the dehydration cylinder 14 gradually decreases in the direction toward the solid outlet. A liquid collecting tank 10 is arranged below the dehydration cylinder 14 and the separation cylinder 8. The liquid collecting tank 10 is connected to the fermentation tank 1 through a liquid infusion pipe, and a flow control valve 4 is arranged at the bottom of the liquid collecting tank 10. After the wastewater is discharged through the drainage hole, it falls into the liquid collecting tank 10, and then is transported to the fermentation tank 1 through the liquid infusion pipe. When the flow control valve 4 is opened, part of the wastewater enters the heat exchange tube 5 through the flow control valve 4. A conveying shaft 11 is arranged inside the separation cylinder 8. The conveying shaft 11 is coaxial with the separation cylinder 8. A spiral conveying sheet 12 is fixedly arranged on the outer wall of the conveying shaft 11, and a conveying motor 13 is connected to one end of the conveying shaft 11. When the conveying motor 13 drives the conveying shaft 11 to rotate, the solid matter in the separation cylinder 8 can be pushed to move toward the direction of the dehydration cylinder 14. After the solid matter enters the dehydration cylinder 14, the inner cavity diameter of the dehydration cylinder 14 gradually decreases, and the solid matter is gradually squeezed to achieve gradual dehydration. After dehydration, the solid matter is discharged from the dehydration cylinder 14 through the solid outlet.

[0027] The dehydration cylinder 14 and the separation cylinder 8 are arranged on the ground near the fermentation tank 1. The dehydration cylinder 14 and the separation cylinder 8 are supported by a frame so that the dehydration cylinder 14 and the separation cylinder 8 are at a suitable height, and the wastewater in the sump 10 can flow into the fermentation tank 1 under the action of its own weight. An inclined conveying trough 15 is arranged below the solid outlet, and the lower end of the conveying trough 15 is connected to the feed end of the compost fermentation chamber 2. The solid matter discharged from the solid outlet falls into the conveying trough 15, and then slides along the conveying trough 15 into the inside of the compost fermentation chamber 2. In order to ensure that the solid matter is evenly laid on the bottom wall of the feed end of the compost fermentation chamber 2, a scraper 16 is arranged inside the feed end of the compost fermentation chamber 2, and the scraper 16 is connected to a scraper driving mechanism 17 that drives the scraper 16 to reciprocate and linearly move. The scraper driving mechanism 17 drives the scraper 16 to move back and forth linearly, and the lower end of the scraper 16 scrapes the solid matter, so that the solid matter is evenly laid on the bottom wall of the compost fermentation chamber 2. A plurality of scraping teeth may be provided at the lower end of the scraper 16 to improve the scraping effect.

[0028] The feed end of the composting fermentation chamber 2 is provided with two support rails 18 and a material height detection mechanism 27. The support rail 18 is provided with a slide 19 that slides with the support rail 18. The scraper drive mechanism 17 includes a screw and a scraper motor. The screw passes through the slide 19 and is threaded with the slide 19. One end of the screw is connected to the scraper motor. When the scraper motor drives the screw to rotate, the screw can push the slide 19 to move linearly along the support rail 18. The two ends of the scraper 16 are fixedly provided with mounting shafts 20. The mounting shafts 20 are rotatably mounted on the slide 19. When the slide 19 moves, the scraper 16 can be driven to move synchronously. The mounting shaft 20 is connected to the adjustment motor 21. The adjustment motor 21 can adjust the angle of the scraper 16, so that the scraper 16 can be in a vertical state or in an inclined state with a variety of inclination angles.

[0029] When the solid material just starts to enter the composting fermentation chamber 2, the thickness of the solid material is relatively low. At this time, the scraper 16 needs to be in a relatively low position to scrape the solid material. As the solid material accumulates, the thickness of the solid material gradually increases, and the height of the scraper 16 also needs to be appropriately increased to achieve the goal of scraping the solid material layer by layer. In the present invention, the scraper 16 is connected to an adjustment motor 21 through a mounting shaft 20, and the adjustment motor 21 can drive the scraper 16 to rotate, so that the scraper 16 can be in a vertical state, a horizontal state, and an inclined state. The mounting shaft 20 is at the upper end of the scraper 16, and the height of the mounting shaft 20 remains unchanged. When the inclination angle of the scraper 16 is different, the lower end height of the scraper 16 is different. Therefore, the inclination angle of the scraper 16 can be adjusted according to the thickness of the solid material, so that the lower end height of the scraper 16 is adapted to the thickness of the solid material, thereby ensuring that the scraper 16 can scrape the surface of the solid material flat. The material height detection mechanism 27 is used to detect the surface height of the solid material at the feed end of the composting fermentation chamber 2, that is, the thickness of the solid material. Specifically, a laser rangefinder or other equipment can be used. The laser rangefinder can be fixedly installed on the top wall of the composting fermentation chamber 2 to detect the distance from the laser rangefinder to the solid material. The thickness of the solid material can be calculated based on the detection structure.

[0030] After the solid matter is dehydrated in the dehydration cylinder 14, it is squeezed into a mass, which is not conducive to the entry of air into the interior. After the solid matter is passed into the composting fermentation chamber 2, the scraper 16 is used to scrape the solid matter back and forth, so that the solid matter that has gathered into a mass can be broken up, which is beneficial to increase the oxygen content in the solid matter, so as to improve the efficiency of composting fermentation.

[0031] There may be acidification in the early stage of compost fermentation. In order to adjust the pH of the fermentation pile and speed up the temperature rise rate in the early stage of fermentation, quicklime can be added to the fermentation pile, and the added weight of quicklime is about 2% of the weight of the fermentation pile. A separate quicklime adding mechanism can be used to add quicklime to the fermentation pile, but the number of equipment will increase. In order to achieve the addition of quicklime and reduce the number of equipment inside the compost fermentation chamber 2, the present invention is provided with a cavity 22 in the scraper 16, and a plurality of feeding holes 23 connected to the cavity 22 are provided on one side of the scraper 16. The cavity 22 is connected to a hose 24, and the hose 24 is sequentially connected to a lime delivery mechanism 26 and an air supply mechanism 25, and the air supply mechanism 25 is connected to the external space of the compost fermentation chamber 2.

[0032] In the present invention, during the process of scraping the solid material layer by layer, after each layer is scraped, the motor 21 is adjusted to drive the scraper 16 to rotate to a horizontal state, at which time the feeding hole 23 is located at the bottom plate of the scraper 16, and then the lime delivery mechanism 26 and the air supply mechanism 25 are started, the lime delivery mechanism 26 delivers powdered quicklime into the hose 24, and the air supply mechanism 25 delivers external air to the hose 24, the flow of air drives the quicklime to move, so that the quicklime enters the cavity 22, and then is discharged from the scraper 16 through each feeding hole 23, and the quicklime falls into the surface layer of the solid material below. The scraper drive mechanism 17 drives the slide 19 and the scraper 16 to move horizontally and linearly, and the quicklime powder can be evenly delivered to the entire surface layer of the solid material.

[0033] The lime delivery mechanism 26 can be a quicklime powder storage box and a powder delivery pump connected to the quicklime powder storage box. The air delivery mechanism 25 can be an air pump, a fan, etc. Since composting fermentation is aerobic fermentation, a certain oxygen content is required in the fermentation pile. In the present invention, quicklime powder is delivered to the scraper 16 by external air. When quicklime is delivered, the external air will also be sprayed toward the solid matter, which can increase the oxygen content of the solid matter and promote the air circulation inside and outside the composting fermentation chamber 2, thereby preventing harmful gases from accumulating in the composting fermentation chamber 2 and causing safety accidents.

[0034] In the present invention, the lime delivery mechanism 26, the air supply mechanism 25, the material height detection mechanism 27, the scraper motor and the regulating motor 21 are all connected to the controller 7, and the controller 7 automatically controls the operation of the regulating motor 21, the scraper motor, the lime delivery mechanism 26 and the air supply mechanism 25.

[0035] The bottom wall of the composting fermentation chamber 2 is inclined, and the feed port is higher than the discharge port, which is conducive to reducing the resistance of pushing the material. A heat preservation plate 28 parallel to the bottom wall is arranged in the composting fermentation chamber 2, and the heat preservation plate 28, the bottom wall of the composting fermentation chamber 2 and the two side walls of the composting fermentation chamber 2 form a fermentation chamber. The heat preservation plate 28 can be a metal plate, and a heat preservation layer is arranged on the upper surface of the metal plate. The heat preservation plate 28 can play a role of heat preservation, reduce the temperature difference between the upper surface of the fermentation pile and the inside of the fermentation pile, and improve the uniformity of fermentation.

[0036] The insulation plate 28 is provided with a plurality of strip holes, the length direction of the strip holes is perpendicular to the moving direction of the material, and the feeding mechanism includes a rotating shaft 29 arranged in each strip hole, and one end of the rotating shaft 29 is connected to a feeding motor 30, and the feeding motor 30 can drive the rotating shaft 29 to rotate. The two ends of the rotating shaft 29 are fixedly provided with guide columns 31 perpendicular to the rotating shaft 29, and the guide columns 31 are provided with a sliding sleeve 32 that slides with the guide columns 31, and the sliding sleeve 32 is fixedly provided with a lifting plate 33, and the rotating shaft 29 is provided with a rectangular through hole, and the lower end of the lifting plate 33 passes through the rectangular through hole and extends into the fermentation chamber, and the lower end of the lifting plate 33 is connected to a plurality of pushing plates 35, and there is a spacing between two adjacent pushing plates 35, and the heat exchange tube 5 is located in the spacing between the pushing plates 35; the upper end of the lifting plate 33 is connected to a lifting mechanism 34, and the lifting mechanism 34 can be a cylinder or other equipment.

[0037] During feeding, the lifting mechanism 34 drives the lifting plate 33 and the pushing plate 35 to move upward, so that the lower end of the pushing plate 35 reaches the rectangular through hole, and then the feeding motor 30 drives the rotating shaft 29 to rotate to an appropriate angle, and the rotating shaft 29 drives the guide column 31, the lifting plate 33, the pushing plate 35 and the like to rotate as a whole, and the rotation direction is: the lower end of the pushing plate 35 rotates toward the direction of the feed inlet. Then the lifting mechanism 34 is used to push the lifting plate 33 and the pushing plate 35 to move downward, and the pushing plate 35 is inserted into the fermentation pile. Then the feeding motor 30 drives the rotating shaft 29 to rotate in the opposite direction, driving the lifting plate 33 and the pushing plate 35 to rotate, and at this time the lower end of the pushing plate 35 rotates toward the direction of the discharge port. When the pushing plate 35 rotates, it can push the fermentation pile to move toward the discharge port.

[0038] There is a gap between the upper end of the insulation board 28 and the side wall of the composting fermentation chamber 2, and the solid matter obtained by solid-liquid separation falls on the upper end of the bottom wall of the composting fermentation chamber 2 through the gap. In the present invention, when the thickness of the solid matter at the upper end of the bottom wall of the composting fermentation chamber 2 reaches the thickness of the fermentation pile, the fermentation pile below the insulation board 28 is fed, so that the fermentation pile below the insulation board 28 moves downward, the fermentation pile at the lower end of the bottom wall of the composting fermentation chamber 2 is discharged through the discharge port, and the solid matter at the upper end of the bottom wall of the composting fermentation chamber 2 slides to the bottom of the insulation board 28. The lower end of the scraper 16 is parallel to the bottom wall of the composting fermentation chamber 2 to ensure uniform thickness of the solid matter.

[0039] During the composting fermentation process, microorganisms decompose organic matter and produce water. In the present invention, a drainage groove 37 is provided on the bottom wall of the composting fermentation chamber 2, and a filter screen 38 is provided at the notch of the drainage groove 37. Excess water can enter the drainage groove 37 through the filter screen 38 and be discharged through the drainage groove 37. The discharged liquid can be added to the fermentation tank 1.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rural aquaculture wastewater fermentation system, comprising a solid-liquid separation device and a fermentation tank (1), characterized in that: A compost fermentation chamber (2) is arranged above the fermentation tank (1); a feed inlet is arranged at one end of the compost fermentation chamber (2) and a discharge outlet is arranged at the other end; a feeding mechanism is arranged in the compost fermentation chamber (2); the liquid outlet of the solid-liquid separation device is connected to the fermentation tank (1), and the solid outlet of the solid-liquid separation device is connected to the feed inlet; The fermentation tank (1) is provided with a heating mechanism (3), the compost fermentation chamber (2) is provided with a plurality of heat exchange tubes (5), the outer wall of the heat exchange tube (5) is provided with a temperature sensor (6), the inlet of the heat exchange tube (5) is connected to the liquid outlet of the solid-liquid separation device through a flow control valve (4), the outlet of the heat exchange tube (5) is connected to the fermentation tank (1), and the inlet of the heat exchange tube (5) is higher than the outlet of the heat exchange tube (5); the temperature sensor (6) and the flow control valve (4) are both connected to a controller (7).

2. The rural aquaculture wastewater fermentation system according to claim 1, characterized in that: The solid-liquid separation device comprises a horizontally arranged separation cylinder (8), wherein a feed bin (9) is arranged at the top of one end of the separation cylinder (8), and a dehydration cylinder (14) is arranged at the other end, and the cylinder walls of the dehydration cylinder (14) and the separation cylinder (8) are provided with a plurality of drainage holes, and a solid outlet is arranged at the end of the dehydration cylinder (14), and the inner diameter of the dehydration cylinder (14) gradually decreases in the direction toward the solid outlet; a liquid collecting tank (10) is arranged below the dehydration cylinder (14) and the separation cylinder (8), and the liquid collecting tank (10) is connected to the fermentation tank (1) through a liquid infusion pipe, and a flow control valve (4) is arranged at the bottom of the liquid collecting tank (10); a conveying shaft (11) is arranged inside the separation cylinder (8), and a spiral conveying sheet (12) is fixedly arranged on the outer wall of the conveying shaft (11), and one end of the conveying shaft (11) is connected to a conveying motor (13).

3. The rural aquaculture wastewater fermentation system according to claim 2, characterized in that: An inclined conveying trough (15) is provided below the solid outlet, the lower end of the conveying trough (15) is connected to the feed end of the compost fermentation chamber (2), a scraper (16) is provided inside the feed end of the compost fermentation chamber (2), and the scraper (16) is connected to a scraper driving mechanism (17) for driving the scraper (16) to reciprocate linearly.

4. The rural aquaculture wastewater fermentation system according to claim 3, characterized in that: The feed end of the composting fermentation chamber (2) is provided with two support rails (18) and a material height detection mechanism (27); the support rails (18) are provided with a slide seat (19) slidably engaged with the support rails (18); the scraper drive mechanism (17) comprises a screw rod and a scraper motor; the screw rod passes through the slide seat (19) and is threadedly engaged with the slide seat (19); one end of the screw rod is connected to the scraper motor; both ends of the scraper (16) are fixedly provided with mounting shafts (20); the mounting shafts (20) are rotatably mounted on the slide seat (19); The mounting shaft (20) is connected to an adjusting motor (21); a cavity (22) is provided in the scraper (16); a plurality of feeding holes (23) communicating with the cavity (22) are provided on one side of the scraper (16); the cavity (22) is connected to a hose (24); the hose (24) is connected to a lime delivery mechanism (26) and an air supply mechanism (25) in sequence; the lime delivery mechanism (26), the air supply mechanism (25), the material height detection mechanism (27), the scraper motor and the adjusting motor (21) are all connected to a controller (7).

5. The rural aquaculture wastewater fermentation system according to claim 1, characterized in that: The bottom wall of the compost fermentation chamber (2) is arranged obliquely, and the feed port is higher than the discharge port. A heat preservation plate (28) parallel to the bottom wall is arranged in the compost fermentation chamber (2), and the heat preservation plate (28), the bottom wall of the compost fermentation chamber (2) and the two side walls of the compost fermentation chamber (2) form a fermentation chamber; the heat preservation plate (28) is provided with a plurality of strip holes, the length direction of the strip holes is perpendicular to the moving direction of the material, and the feeding mechanism comprises a rotating shaft (29) arranged in each strip hole, one end of the rotating shaft (29) is connected to a feeding motor (30), and two ends of the rotating shaft (29) are fixedly provided with a feeding motor (30) perpendicular to the feeding motor (30). A guide column (31) of the rotating shaft (29), the guide column (31) is provided with a sliding sleeve (32) that is slidably matched with the guide column (31), a lifting plate (33) is fixedly provided on the sliding sleeve (32), the rotating shaft (29) is provided with a rectangular through hole, the lower end of the lifting plate (33) passes through the rectangular through hole and extends into the fermentation chamber, and the lower end of the lifting plate (33) is connected to a plurality of pushing plates (35), there is a spacing between two adjacent pushing plates (35), and the heat exchange tube (5) is located in the spacing between the pushing plates (35); the upper end of the lifting plate (33) is connected to a lifting mechanism (34).

6. The rural aquaculture wastewater fermentation system according to claim 1, characterized in that: A plurality of vertical partitions (36) are arranged in the fermentation tank (1), and the partitions (36) divide the inner cavity of the fermentation tank (1) into rectangular wave-shaped water flow channels.

7. The rural aquaculture wastewater fermentation system according to claim 1, characterized in that: The bottom wall of the compost fermentation chamber (2) is provided with a drainage groove (37), and the notch of the drainage groove (37) is provided with a filter screen (38).

8. The rural aquaculture wastewater fermentation system according to claim 1, characterized in that: A sealing member (39) is provided in the fermentation tank (1).

9. The rural aquaculture wastewater fermentation system according to claim 1, characterized in that: An aeration pipe (40) is arranged at the bottom of the fermentation tank (1), an exhaust fan (41) is arranged in the fermentation tank (1), the exhaust fan (41) is connected to an exhaust pipe (42) and an air return pipe (43), valves are arranged on the exhaust pipe (42) and the air return pipe (43), and the air return pipe (43) is connected to the aeration pipe (40).

Images