A double-layer film structure trough composting system

Abstract

The present invention provides a double-layer shed film structure trough composting system, which belongs to the technical field of composting systems. The double-layer shed film structure trough composting system includes a workshop, in which at least one fermentation tank is arranged. The system also includes a circulating aeration unit, a deodorization unit and a water treatment unit. The circulating aeration unit removes most of the odor and water vapor in the workshop, and recovers the heat in the workshop to the materials in the fermentation tank, which is beneficial to the fermentation of the materials; the deodorization unit removes the remaining odor and dust in the workshop to achieve no odor emission; at the same time, the water treatment unit treats and recycles the wastewater generated in the deodorization process to achieve no wastewater emission.

Description

Technical Field

[0001] The invention belongs to the technical field of composting systems and relates to a trough-type composting system with a double-layer shed film structure. Background Art

[0002] Composting is one of the important ways to achieve harmlessness, reduction and resource utilization of livestock and poultry waste. Trough composting is widely used due to its large processing capacity and high degree of automation. However, the conventional trough composting workshop is not tightly sealed, the composting process is greatly affected by the external environment, the odor collection and treatment is difficult, and the wastewater generated during the production and deodorization process is discharged arbitrarily without effective treatment, causing serious pollution to the surrounding environment and affecting the normal life of surrounding residents. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a double-layer film structure trough composting system. The technical problem to be solved by the present invention is: how to achieve zero emission of odor and wastewater during the composting process.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A double-layer film shed structure trough composting system, comprising a workshop, wherein at least one fermentation tank is arranged in the workshop, and characterized in that the double-layer film shed structure trough composting system further comprises a circulating aeration unit, a deodorization unit and a water treatment unit;

[0006] The circulating aeration aeration unit comprises an air collecting pipe, a dehumidifier, a blower and an aeration pipe, wherein the air collecting pipe is hoisted in the workshop, one end of the air collecting pipe extends to the outside of the workshop and is connected to the air inlet of the dehumidifier, the air inlet of the blower is connected to the air outlet of the dehumidifier, the aeration pipe is arranged at the bottom of the fermentation tank, one end of the aeration pipe extends to the outside of the workshop and is connected to the air outlet of the blower;

[0007] The deodorization unit comprises a ventilation fan and a closed reaction chamber, wherein the ventilation fan is arranged on the workshop and is used to extract the odor in the workshop, and the closed reaction chamber is arranged outside the workshop and is connected to the air outlet of the ventilation fan, and a spray device and a water collection device are arranged in the closed reaction chamber, wherein the spray device is used to deodorize and remove dust from the odor extracted by the ventilation fan, and the water collection device is used to collect the wastewater after the spray device has deodorized the odor;

[0008] The water treatment unit comprises a first drain pipe, a second drain pipe, and a water collection tank, an anoxic tank, an aerobic tank, a sedimentation tank and a reused water tank which are arranged outside the workshop and connected in sequence through pipelines; one end of the first drain pipe is connected to the drain outlet of the water remover, and the other end is connected to the water collection tank; one end of the second drain pipe is connected to the water collection device, and the other end is connected to the water collection tank; a reflux pump is arranged in the aerobic tank, and the aerobic tank is used to convert ammonia nitrogen in the wastewater into nitrate nitrogen, and the reflux pump is used to pump the water converted into nitrate nitrogen in the aerobic tank into the anoxic tank, and form a denitrification reaction in the anoxic tank to convert ammonia nitrogen in the wastewater into nitrogen gas; the sedimentation tank is used to precipitate sludge; and the reused water tank is used to pump the treated water to the spray device through a water pump.

[0009] When composting, close the workshop feed door and discharge door, and at the same time close the ventilation fan, start the dehumidifier and blower of the circulating air blowing unit, and the odor, water vapor and heat released into the workshop by the materials in the fermentation tank during the composting process will flow through the air collecting pipe, pass through the dehumidifier to remove water under the action of the blower, and then enter the materials in the fermentation tank through the aeration pipe, so as to realize heat recovery and remove most of the odor; start the dehumidifier and blower of the circulating air blowing unit for a certain period of time, then close them, and at the same time open the workshop feed door and the ventilation fan and spray device of the deodorization unit to inject fresh air into the workshop, and ventilate. The fan extracts the odor remaining in the workshop after the circulating air blowing unit has been deodorized into the closed reaction chamber, and the spray device deodorizes and removes dust from the extracted odor; the dehydrator, blower of the circulating air blowing unit, the ventilation fan and the spray device of the deodorizing unit are started and operated alternately to achieve odor-free emission; at the same time, the water treatment unit collects the wastewater from the dehydrator and the water collecting device through the first drain pipe and the second drain pipe respectively, and the water body passes through the anoxic tank, aerobic tank and sedimentation tank in turn to remove ammonia and precipitate sludge in the wastewater, and then flows to the reuse water tank, and the treated water body is then extracted to the spray device for recycling to achieve no wastewater discharge.

[0010] Furthermore, the workshop includes a floor, a wall and a ceiling, the lower end of the wall is connected to the floor, and the upper end of the wall is connected to the ceiling.

[0011] Preferably, the floor is a cement floor, the wall and the ceiling both include an inner layer of greenhouse film and an outer layer of greenhouse film, and the greenhouse film material is a drip-free film. The drip-free film can absorb the water vapor near the greenhouse film in the workshop to the surface of the film, forming water droplets that drip downward, thereby eliminating the fog in the workshop, reducing the relative humidity of the air in the workshop, and enhancing the light intensity irradiated into the workshop. The double-layer film ceiling uses solar energy to heat and keep the workshop warm, creating a favorable external environment for composting.

[0012] As another embodiment, the wall may be a brick-concrete structure or a steel structure. Concrete structure or steel structure can effectively increase the structural strength of the wall.

[0013] Furthermore, the portion of the gas collecting pipeline located in the workshop is evenly provided with openings for collecting water vapor, odor and heat generated during the composting process in the workshop.

[0014] Preferably, the gas collecting pipe is a PVC pipe or a PE pipe.

[0015] Furthermore, the aeration pipe is a perforated PVC pipe or PE pipe. Through the perforation, the odor collected by the gas collection pipe can be returned to the material in the fermentation tank, the material itself is used to remove the odor, and oxygen is transported to the material, which is beneficial to the fermentation of the material.

[0016] Furthermore, the spray device includes a plurality of spray pipes, on which a plurality of atomizing nozzles are arranged, and the spray pipes are connected to a water delivery pipe, which passes through the closed reaction chamber and extends to the reuse water pool and is connected to a water pump. The water pump is used to deliver the deodorized and precipitated water in the reuse water pool through the water delivery pipe to the spray device for spraying, so as to recycle water and save water resources.

[0017] Furthermore, the closed reaction chamber is constructed of a brick-concrete structure or airtight materials.

[0018] As another embodiment, the closed reaction chamber may be provided with an exhaust pipe, and the exhaust pipe is used to discharge the gas after deodorization and dust removal.

[0019] Furthermore, a doser is provided on the water delivery pipeline, and the doser is used to add deodorant to the water delivered to the spray device through the water delivery pipeline, so as to further enhance the deodorizing effect of the deodorizing unit.

[0020] Furthermore, the water collection device includes a pool for collecting wastewater after spray deodorization by the spray device. A drain outlet is provided at the bottom of the pool. One end of the second drain outlet is fixedly connected to the drain outlet, and the other end is connected to the water collection pool.

[0021] Furthermore, the water treatment unit also includes a third drain pipe, which includes two vertical pipes close to the inner wall of the wall and a horizontal pipe located outside the workshop, the upper end of the vertical pipe is slightly lower than the upper end of the wall, and the lower end of the vertical pipe extends to the outside of the workshop to connect to the same horizontal pipe, and the horizontal pipe is connected to the water collection tank; a water collection tank is also provided at the upper end of the wall, one end of the water collection tank is flush with the upper end of the wall, and the other end of the water collection tank is connected to the upper end of the vertically arranged pipe. The water vapor adsorbed by the ceiling forms water droplets, which flow down along the inner wall of the ceiling into the water collection tank. Because one end of the water collection tank connected to the vertically arranged pipe is slightly lower than the other end, the water droplets can smoothly flow into the water collection tank along the third drain pipe, thereby treating this part of the wastewater.

[0022] Preferably, the third drainage pipe is a PVC pipe or a PE pipe.

[0023] Furthermore, a sludge return pump and a sludge discharge pump are provided at the bottom of the sedimentation tank. The sludge return pump is used to return the sludge in the sedimentation tank to the aerobic tank to ensure the sludge concentration in the aerobic tank, and the sludge discharge pump is used to discharge excess sludge.

[0024] Furthermore, an aeration plate is provided at the bottom of the aerobic pool, and the aeration plate is used to provide oxygen to the water in the aerobic pool.

[0025] The beneficial effects of the present invention are:

[0026] 1. First, most of the odor and water vapor in the workshop are removed through the circulating air blowing unit, and the heat in the workshop is recovered to the materials in the fermentation tank, which is beneficial to the fermentation of the materials; then the remaining odor and dust in the workshop are removed through the deodorization unit to achieve odor-free emission; at the same time, the wastewater generated during the deodorization process is treated and recycled through the water treatment unit to achieve no wastewater discharge.

[0027] 2. The workshop is set up with a double-layer film structure, which can enhance the light intensity shining into the workshop. The double-layer film ceiling uses solar energy to heat and insulate the workshop, creating a favorable external environment for composting. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a double-layer film structure trough composting system.

[0029] In the figure, 1, workshop; 2, fermentation tank; 3, gas collecting pipe; 4, dehydrator; 5, blower; 6, aeration pipe; 7, ventilation fan; 8, closed reaction chamber; 9, first drain pipe; 10, second drain pipe; 11, water collecting tank; 12, anoxic tank; 13, aerobic tank; 14, sedimentation tank; 15, recycled water tank; 16, reflux pump; 17, floor; 18, wall; 19, ceiling; 20, opening; 21, spray pipe; 22, atomizing nozzle; 23, water supply pipe; 24, discharge pipe; 25, dosing device; 26, third drain pipe; 27, water collecting tank; 28, sludge return pump; 29, sludge pump; 30, aeration plate. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] like Figure 1 As shown, the double-layer film shed structure trough composting system includes a workshop 1, in which at least one fermentation tank 2 is arranged, and the double-layer film shed structure trough composting system also includes a circulating aeration unit, a deodorization unit and a water treatment unit;

[0032] The circulating aeration unit includes an air collecting pipe 3, a water eliminator 4, a blower 5 and an aeration pipe 6. The air collecting pipe 3 is hoisted in the workshop 1. One end of the air collecting pipe 3 extends to the outside of the workshop 1 and is connected to the air inlet of the water eliminator 4. The air inlet of the blower 5 is connected to the air outlet of the water eliminator 4. The aeration pipe 6 is arranged at the bottom of the fermentation tank 2. One end of the aeration pipe 6 extends to the outside of the workshop 1 and is connected to the air outlet of the blower 5.

[0033] The deodorization unit includes a ventilation fan 7 and a closed reaction chamber 8. The ventilation fan 7 is arranged on the workshop 1 and is used to extract the odor in the workshop 1. The closed reaction chamber 8 is arranged outside the workshop 1 and is connected to the air outlet of the ventilation fan 7. A spray device and a water collection device are arranged in the closed reaction chamber 8. The spray device is used to deodorize and remove dust from the odor extracted by the ventilation fan 7. The water collection device is used to collect wastewater after the spray device has deodorized the odor.

[0034] The water treatment unit includes a first drain pipe 9, a second drain pipe 10, and a water collection tank 11, an anoxic tank 12, an aerobic tank 13, a sedimentation tank 14 and a reuse water tank 15 which are arranged outside the workshop 1 and connected in sequence through pipelines; one end of the first drain pipe 9 is connected to the drain outlet of the water remover 4, and the other end is connected to the water collection tank 11; one end of the second drain pipe 10 is connected to the water collection device, and the other end is connected to the water collection tank 11; a reflux pump 16 is arranged in the aerobic tank 13, and the aerobic tank 13 is used to convert ammonia nitrogen in the wastewater into nitrate nitrogen. The reflux pump 16 is used to pump the water converted into nitrate nitrogen in the aerobic tank 13 into the anoxic tank 12, and form a denitrification reaction in the anoxic tank 12 to convert the ammonia nitrogen in the wastewater into nitrogen gas; the sedimentation tank 14 is used to precipitate sludge; the reuse water tank 15 is used to pump the treated water to the spray device through a water pump.

[0035] The purification principle is as follows:

[0036] The nitrification reaction formula is: NH4++2O2→NO3-+2H++H2O

[0037] The denitrification reaction formula is: 6NO3-+5CH3OH+CO2→3N2+6HCO3-+7H2O

[0038] Or 6NO3-+5CH3OH→3N2+6OH-+5CO2+7H2O

[0039] When composting, the feed end door and the discharge end door of the workshop 1 are closed, and the ventilation fan 7 is closed at the same time, and the dehumidifier 4 and the blower 5 of the circulating air blowing unit are started. The odor, water vapor and heat released into the workshop 1 by the materials in the fermentation tank 2 during the composting process flow through the dehumidifier 4 through the air collecting pipe 3 under the action of the blower 5 after dehydration, and then enter the materials in the fermentation tank 2 through the aeration pipe 6, so as to realize heat recovery and remove most of the odor; the dehumidifier 4 and the blower 5 of the circulating air blowing unit are started and run for a certain period of time, and then closed, and the feed end door of the workshop 1 and the ventilation fan 7 and the spray device of the deodorization unit are opened at the same time to inject fresh air into the workshop 1, and the ventilation fan The machine 7 extracts the odor remaining in the workshop 1 after the circulating air blowing unit has been deodorized into the closed reaction chamber 8, and the spray device deodorizes and removes dust from the extracted odor; the dehydrator 4 and the blower 5 of the circulating air blowing unit and the ventilation fan 7 and the spray device of the deodorizing unit are started to operate alternately to achieve odor-free emission; at the same time, the water treatment unit collects the wastewater from the dehydrator 4 and the water collecting device through the first drain pipe 9 and the second drain pipe 10 respectively, and the water body passes through the anoxic tank 12, the aerobic tank 13, and the sedimentation tank 14 in turn to remove ammonia and precipitate sludge in the wastewater and then flows to the reuse water tank 15, and the treated water body is then extracted to the spray device for recycling to achieve no wastewater discharge.

[0040] The workshop 1 includes a floor 17, a wall 18 and a ceiling 19; the lower end of the wall 18 is connected to the floor 17, and the upper end of the wall 18 is connected to the ceiling 19; the floor 17 is a cement floor 17, and the wall 18 and the ceiling 19 both include an inner layer of greenhouse film and an outer layer of greenhouse film, and the greenhouse film material is a drip-free film. The drip-free film can absorb the water vapor near the greenhouse film in the workshop 1 to the surface of the film, forming water droplets that drip downward, thereby eliminating the fog in the workshop 1, reducing the relative humidity of the air in the workshop 1, and enhancing the light intensity irradiated into the workshop 1. The double-layer film ceiling 19 uses solar energy to heat and insulate the workshop 1, creating a favorable external environment for composting.

[0041] As another embodiment, the wall 18 may be a brick-concrete structure or a steel structure. The concrete structure or the steel structure can effectively increase the structural strength of the wall 18.

[0042] The part of the gas collecting pipe 3 located in the workshop 1 is evenly provided with openings 20 for collecting water vapor, odor and heat generated during the composting process in the workshop 1. Preferably, the gas collecting pipe 3 is a PVC pipe or a PE pipe.

[0043] The aeration pipe 6 is a perforated PVC pipe or PE pipe. By perforating, the odor collected by the gas collecting pipe 3 can be returned to the material in the fermentation tank 2, and the material itself is used to remove the odor, and oxygen is transported to the material, which is conducive to the fermentation of the material.

[0044] The spray device includes a plurality of spray pipes 21, on which a plurality of atomizing nozzles 22 are arranged. The spray pipes are connected to a water delivery pipe 23, which passes through the closed reaction chamber 8 and extends to the reuse water pool 15 and is connected to a water pump. The water pump is used to transport the deodorized and precipitated water in the reuse water pool 15 to the spray device through the water delivery pipe 23 for spraying, so as to recycle water and save water resources.

[0045] The closed reaction chamber 8 is constructed of a brick-concrete structure or airtight materials.

[0046] As another embodiment, the closed reaction chamber 8 may be provided with an exhaust pipe 24, and the exhaust pipe 24 is used to exhaust the gas after deodorization and dust removal.

[0047] A doser 25 is provided on the water delivery pipe 23, and the doser 25 is used to add a deodorant to the water delivered to the spray device through the water delivery pipe 23, so as to further enhance the deodorizing effect of the deodorizing unit.

[0048] The water collection device includes a pool for collecting wastewater after spray deodorization by the spray device. A drain outlet is provided at the bottom of the pool. One end of the second drain outlet 10 is fixedly connected to the drain outlet, and the other end is connected to the water collection pool 11.

[0049] The water treatment unit also includes a third drain pipe 26, which includes two vertical pipes close to the inner wall of the wall 18 and a horizontal pipe located outside the workshop 1. The upper end of the vertical pipe is slightly lower than the upper end of the wall 18, and the lower end of the vertical pipe extends to the outside of the workshop 1 to connect to the same horizontal pipe, and the horizontal pipe is connected to the water collection tank 11; a water collection tank 27 is also provided at the upper end of the wall 18, one end of the water collection tank 27 is flush with the upper end of the wall 18, and the other end of the water collection tank 27 is connected to the upper end of the vertically arranged pipe. The water vapor adsorbed by the ceiling 19 forms water droplets, and the water droplets flow down along the inner wall of the ceiling 19 into the water collection tank 27. Because one end of the water collection tank 27 connected to the vertically arranged pipe is slightly lower than the other end, the water droplets can smoothly flow into the water collection tank 11 along the third drain pipe 26, and then treat this part of the wastewater. Preferably, the third drain pipe 26 is a PVC pipe or a PE pipe.

[0050] A sludge return pump 2816 and a sludge discharge pump 29 (not shown) are provided at the bottom of the sedimentation tank 14. The sludge return pump 2816 is used to return the sludge in the sedimentation tank 14 to the aerobic tank 13 to ensure the sludge concentration in the aerobic tank 13. The sludge discharge pump 29 is used to discharge the excess sludge and recycle the sludge into the material in the fermentation tank 2 for composting. An aeration plate 30 is provided at the bottom of the aerobic tank 13 to provide oxygen to the water in the aerobic tank 13.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A double-layer film structure trough composting system, comprising a workshop, wherein at least one fermentation tank is arranged in the workshop, characterized in that: The double-layer film structure trough composting system also includes a circulating aeration unit, a deodorization unit and a water treatment unit; The circulating aeration aeration unit comprises an air collecting pipe, a dehumidifier, a blower and an aeration pipe, wherein the air collecting pipe is hoisted in the workshop, one end of the air collecting pipe extends to the outside of the workshop and is connected to the air inlet of the dehumidifier, the air inlet of the blower is connected to the air outlet of the dehumidifier, the aeration pipe is arranged at the bottom of the fermentation tank, one end of the aeration pipe extends to the outside of the workshop and is connected to the air outlet of the blower; The deodorization unit comprises a ventilation fan and a closed reaction chamber, wherein the ventilation fan is arranged on the workshop and is used to extract the odor in the workshop, and the closed reaction chamber is arranged outside the workshop and is connected to the air outlet of the ventilation fan, and a spray device and a water collection device are arranged in the closed reaction chamber, wherein the spray device is used to deodorize and remove dust from the odor extracted by the ventilation fan, and the water collection device is used to collect the wastewater after the spray device has deodorized the odor; The water treatment unit comprises a first drain pipe, a second drain pipe, and a water collection tank, an anoxic tank, an aerobic tank, a sedimentation tank, and a reused water tank which are arranged outside the workshop and connected in sequence through pipelines; one end of the first drain pipe is connected to the drain outlet of the water remover, and the other end is connected to the water collection tank; one end of the second drain pipe is connected to the water collection device, and the other end is connected to the water collection tank; a reflux pump is arranged in the aerobic tank, the aerobic tank is used to convert ammonia nitrogen in the wastewater into nitrate nitrogen, the reflux pump is used to pump the water converted into nitrate nitrogen in the aerobic tank into the anoxic tank, and form a denitrification reaction in the anoxic tank to convert ammonia nitrogen in the wastewater into nitrogen gas; the sedimentation tank is used to precipitate sludge; the reused water tank is used to pump the treated water to the spray device through a water pump; A sludge return pump and a sludge discharge pump are provided at the bottom of the sedimentation tank. The sludge return pump is used to return the sludge in the sedimentation tank to the aerobic tank to ensure the sludge concentration in the aerobic tank, and the sludge discharge pump is used to discharge excess sludge; An aeration plate is provided at the bottom of the aerobic pool, and the aeration plate is used to provide oxygen to the water in the aerobic pool; The workshop includes a floor, walls and a ceiling, the lower end of the wall is connected to the floor, the upper end of the wall is connected to the ceiling, the floor is a cement floor, the wall and the ceiling both include an inner layer of shed film and an outer layer of shed film, and the shed film material is a drip-free film.

2. A double-layer film structure trough composting system according to claim 1, characterized in that: The gas collecting pipe located in the workshop is evenly provided with openings for collecting water vapor, odor and heat generated during the composting process in the workshop. The gas collecting pipe is a PVC pipe or a PE pipe; the aeration pipe is a perforated PVC pipe or a PE pipe.

3. A double-layer film structure trough composting system according to claim 1, characterized in that: The spray device comprises a plurality of spray pipes, on which a plurality of atomizing nozzles are arranged, and the spray pipes are connected with water delivery pipes, which extend through the closed reaction chamber to the reuse water pool and are connected with a water pump.

4. A double-layer film structure trough composting system according to claim 1, characterized in that: The closed reaction chamber is constructed of a brick-concrete structure or airtight materials.

5. The double-layer film structure trough composting system according to claim 3 is characterized by: The water delivery pipeline is provided with a doser, and the doser is used to add deodorant to the water delivered to the spray device through the water delivery pipeline, so as to further enhance the deodorizing effect of the deodorizing unit.

6. The double-layer film structure trough composting system according to claim 1, characterized in that: The water collection device comprises a pool for collecting wastewater after spray deodorization by the spray device. A drain outlet is provided at the bottom of the pool. One end of the second drain outlet is fixedly connected to the drain outlet, and the other end is connected to the water collection pool.

7. The double-layer film structure trough composting system according to claim 1, characterized in that: The water treatment unit also includes a third drain pipe, which includes two vertical pipes close to the inner wall of the wall and a horizontal pipe located outside the workshop, the upper end of the vertical pipe is slightly lower than the upper end of the wall, and the lower end of the vertical pipe extends to the outside of the workshop to connect to the same horizontal pipe, and the horizontal pipe is connected to the water collection tank; a water collection trough is also provided at the upper end of the wall, one end of the water collection trough is flush with the upper end of the wall, and the other end of the water collection trough is connected to the upper end of the vertical pipe.

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