A system for reducing ammonia emissions using groundwater

Abstract

The present invention discloses a system for reducing ammonia emissions by using groundwater, including a manure pit cooling system for absorbing manure energy through groundwater, a water pump system for pumping groundwater to the manure pit cooling system, and a pipeline system for conveying groundwater, wherein the pipeline system is connected to the manure pit cooling system and the water pump system. The present application utilizes the stable temperature of 5-10°C of groundwater all year round through a water pump system to achieve low-temperature water taking away heat from manure and urine when passing through a manure and urine basin containing a pipeline or a self-contained cavity, thereby reducing the temperature of manure and urine and thereby reducing the odor (ammonia) emissions from pig manure and urine. At the same time, the groundwater after absorbing heat can be directly used for wet curtains and deodorizing water in summer, or recycled after being cooled by a cooling tower in winter.

Description

Technical Field

[0001] The present invention belongs to the technical field of livestock and poultry breeding devices, and specifically relates to a system for reducing ammonia emissions by using groundwater. Background Art

[0002] The main source of the odor (ammonia) in the breeding factory is the feces and urine of animals. The factors affecting the ammonia emission from feces and urine mainly include the pH value of feces and urine, the urea concentration in urine, and the temperature of feces and urine. Research shows that for every 1-degree decrease in the temperature of feces and urine, the ammonia volatilization decreases by 5 - 10%. Therefore, cooling feces and urine can solve the ammonia emission problem at the source.

[0003] At the same time, the existing manure cleaning methods in pig farms at home and abroad are mainly divided into the following two types: flushing manure cleaning and mechanical manure cleaning. Both of these manure cleaning methods will inevitably generate a large amount of odor (ammonia) during the time when pig manure stays in the manure ditch, which affects the health of pigs and humans, and causes waste of manure source heat.

[0004] Therefore, the existing technology still needs to be further developed and improved. Summary of the Invention

[0005] In view of the various deficiencies of the existing technology, in order to solve the above problems, a system for reducing ammonia emissions by using groundwater is proposed. The present invention provides the following technical solutions:

[0006] A system for reducing ammonia emissions by using groundwater, comprising a manure pond cooling system for absorbing manure energy through groundwater, a water pump system for pumping groundwater to the manure pond cooling system, and a pipeline system for transporting groundwater. The pipeline system connects the manure pond cooling system and the water pump system.

[0007] Furthermore, it further includes a heat exchange system for recovering the manure energy in the manure pond cooling system. The heat exchange system is connected to the manure pond cooling system through the pipeline system.

[0008] Furthermore, the heat exchange system includes a cooling tower.

[0009] Furthermore, the pipeline system includes multiple parallel pipelines, and a pipeline control switch is provided on each pipeline.

[0010] Furthermore, it further includes a control system, and the control system is respectively and controllably connected to the pipeline system, the heat exchange system, and the water pump system.

[0011] Furthermore, the manure pond cooling system includes a self-cooling manure pond with a circulating pipeline and / or a manure urine basin with a cooling device.

[0012] Further, the self-cooling septic tank includes a septic tank body, a feces leakage floor and pipelines. Water is provided inside the pipelines. The pipelines are arranged inside the septic tank body, and the feces leakage floor is laid above the septic tank body.

[0013] Further, the feces and urine basin includes a basin body. A feces receiving tray for receiving feces and urine and a feces storage tank connected to the feces receiving tray are arranged at the inner bottom of the basin body. The feces receiving tray is arranged obliquely downward relative to the feces storage tank.

[0014] Further, a cooling part for reducing the temperature of feces and urine on the feces receiving tray is arranged inside the feces receiving tray. An inlet and an outlet communicating with the cooling part are arranged on the basin body corresponding to the cooling part. A feces outlet is arranged inside the feces storage tank.

[0015] Further, a diversion groove extending to the feces storage tank is arranged on the upper surface of the feces receiving tray. At least one diversion groove is arranged, and each diversion groove is uniformly arranged on the upper surface of the feces receiving tray. The adjacent diversion grooves are communicated with each other.

[0016] Beneficial effects:

[0017] In this application, by using the water pump system to utilize the temperature of groundwater, which is stable at 5-10°C all year round, it is realized that when low-temperature water passes through the feces and urine basin with pipelines or a self-contained cavity, the heat in the feces and urine is taken away, reducing the temperature of the feces and urine, thereby reducing the emission of odor (ammonia) in the feces and urine of pigs. At the same time, the groundwater after absorbing heat can be directly used for wet curtains and deodorization water in summer, or recycled after being cooled by a cooling tower in winter. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of a fecal energy recycling system in a specific embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of the first type of self-cooling septic tank in a specific embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of the second type of self-cooling septic tank in a specific embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of the third type of self-cooling septic tank in a specific embodiment of the present invention;

[0022] Figure 5 is a schematic structural diagram of the feces and urine basin in a specific embodiment;

[0023] Figure 6 is a top view of the feces and urine basin in a specific embodiment;

[0024] Figure 7 is a front view of the feces and urine basin in a specific embodiment;

[0025] Figure 8 It is a cross-sectional view of the manure and urine basin in a specific embodiment;

[0026] Figure 9 It is a longitudinal sectional view of the manure and urine basin in a specific embodiment.

[0027] Figure 10 It is a usage state diagram of the manure and urine receiving device applied to a pigsty in a specific embodiment;

[0028] Figure 11 It is a schematic structural diagram of the combined installation of multiple cooling manure and urine basins in a specific embodiment.

[0029] In the drawings: 1000, manure pit cooling system; 2000, heat exchange system; 3000, pipeline system; 4000, water pump system; 1100, manure and urine basin; 1110, manure receiving tray; 1111, diversion groove; 1120, manure storage tank; 1121, manure outlet; 1130, cooling part; 1131, water inlet; 1132, water outlet; 1140, strengthening structural rib; 1150, pull plate; 1200, pen; 1300, sewage suction pipeline; 1310, solenoid valve; 1410, female quick installation joint; 1420, male quick installation joint; 1510, manure pit body; 1520, manure leakage floor; 1530, pipeline; 1540, floating fin. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall all fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "left", "right", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for illustration rather than limitation of the present invention.

[0031] As Figure 1 shown, a system for reducing ammonia emissions by using groundwater includes a manure pit cooling system 1000 for absorbing manure energy through groundwater, a water pump system 4000 for pumping groundwater to the manure pit cooling system 1000, and a pipeline system 3000 for transporting groundwater. The pipeline system 3000 connects the manure pit cooling system 1000 and the water pump system 4000. By utilizing the characteristics of low and relatively constant groundwater temperature, the manure pit cooling system 1000 is set up, and low-temperature groundwater is pumped into the manure pit cooling system 1000 to reduce the temperature of the manure and urine in the manure pit, thereby reducing the ammonia volatilization amount of the manure and urine, improving the environment of the pigsty, being beneficial to the health of pigs and breeding personnel, making full use of groundwater resources, saving costs, and simultaneously achieving the concept of green and environmental-friendly large-scale breeding.

[0032] Further, it further includes a heat exchange system 2000 for recovering the manure energy in the manure pit cooling system 1000. The heat exchange system 2000 is connected to the manure pit cooling system 1000 through the pipeline system 3000. The heat energy absorbed in the groundwater is recovered through the heat exchange system 2000.

[0033] Further, the heat exchange system 2000 includes a cooling tower. Through the heat exchange function of the cooling tower, the groundwater after absorbing heat is cooled by heat exchange, and the groundwater that has lost heat can be reused or sent back underground.

[0034] Further, the pipeline system 3000 includes multiple parallel pipelines, and each pipeline is provided with a pipeline control switch. By arranging the pipelines in parallel and equipping them with corresponding pipeline control switches, users can conveniently manage the on-off of the pipeline system 3000, recover and use it purposefully, and close and save energy for the unused pigsty areas, achieving the purpose of saving energy and environmental protection. The pipeline control switch preferably uses a solenoid valve control switch.

[0035] Further, it further includes a control system, and the control system is respectively connected to the pipeline system 3000, the heat exchange system 2000, and the water pump system 4000 for control. The control system can control the on-off of the pipeline system 3000 and effectively control the flow direction of the water in the pipeline system 3000; by adding a control system, the entire pigsty system is finely and intelligently controlled, reducing the complexity of manual operation and being applicable to large-scale breeding.

[0036] Further, the manure pit cooling system 1000 includes a self-cooling manure pit with a circulating pipeline and / or a manure urine basin with a cooling device. The manure pit cooling system 1000 that fully exchanges heat with the pigsty manure urine is set up, so that the waste heat of the pigsty manure urine is taken away by the groundwater in the manure pit cooling system 1000, thereby reducing the temperature of the manure urine, reducing the emission of manure urine ammonia, and reusing the heat and saving energy.

[0037] Such as Figures 2 - 4As shown, the self-cooling manure pit includes a manure pit body 1510, a manure-leaking floor 1520 and a cooling pipeline 1530. The cooling pipeline 1530 has built-in cooling water. The cooling pipeline 1530 is arranged in the manure pit body 1510, and the manure-leaking floor 1520 is laid on the manure pit body 1510. By arranging a cooling pipeline 1530 with cooling water in the manure pit body 1510, low-temperature water flows through the cooling pipeline 1530, taking away the heat in the pig feces and urine, thereby reducing the temperature of the manure sludge in the manure pit body 1510, and then reducing the emission of odor (ammonia) in the feces and urine, and improving the air quality of the pig house. Further, the cooling water is flowing low-temperature water. Low-temperature water can be directly obtained by extracting groundwater, which is low in cost and can be recycled. After taking away the heat, the low-temperature water can be transported to the heat exchange system, and the heat energy can be recycled after heat exchange, which can be used for other heating in the pig farm to save energy. The water after heat exchange can also be used for cleaning and other occasions in the pig farm. Furthermore, the cooling pipeline 1530 is pre-buried at the bottom of the manure pit body 1510. It is fixed with a pipe clamp and covered with cement from above. The manure and sewage are not in direct contact with the cooling pipeline 1530. The cement layer on the surface of the cooling pipeline 1530 serves as a heat-conducting medium. The manure pit body 1510 is cooled from the bottom to the top, and the cooling efficiency is high and the effect is good. In another preferred embodiment, the cooling pipeline 1530 can be detachably placed in the manure pit body 1510. The position of the cooling pipeline 1530 in the manure sludge is not limited. Through the cooling pipeline 1530 and the cooling water in the cooling pipeline 1530, the cooling pipeline 1530 is immersed in the manure sludge as a whole, fully contacts the manure sludge, and reduces the temperature of the manure sludge. In addition, this method can be used to install the cooling pipeline 1530 after the civil construction of the manure pit body 1510 is completed, and the installation is flexible. Furthermore, the cooling pipeline 1530 is provided with floating fins 1540 for making the cooling pipeline 1530 float up and down with the sludge liquid level in the manure pit body 1510. The floating fins 1540 are plastic floating fins or metal floating fins. The floating fins 1540 enable the cooling pipeline 1530 to float up and down with the sludge, fully contacting the higher temperature of the feces and urine on the upper surface of the sludge liquid surface. The floating fins 1540 in a manure pit body 1510 are connected in a series and in parallel to achieve the effect of cooling the entire tank, so that the surface of the sludge is quickly cooled. In another preferred embodiment, the cooling pipeline 1530 is fixed under the manure leaking floor 1520. The cooling pipeline 1530 is installed above the manure pit body 1510 and under the manure leaking floor 1520, and is fixed with a pipe clamp. The heat in the manure heats the air above the manure, and the cooling pipeline 1530 under the manure leaking floor takes away the heat in the air to achieve a cooling effect. In this way, the cooling pipeline 1530 can be installed after the civil construction of the manure pit body 1510 is completed, which is flexible to install and easy to maintain, reducing construction costs. Furthermore, the cooling pipeline 1530 is laid in parallel in the manure pit body 1510 in a zigzag shape with a spacing of 350-400mm. Furthermore, the cooling pipeline 1530 uses a low-density polyethylene pipe with a diameter of 15-20mm. In a preferred embodiment, the diameter is 18mm.Further, the manure pit body 1510 includes a plurality of manure ditches arranged side by side, and a cooling pipeline 1530 is arranged in each manure ditch. A cooling pipeline switch is arranged in each manure ditch. The solenoid valve 1310 is manually or automatically controlled by a control system to close the cooling pipelines 1530 of one or more manure ditches without pigs above, so as to achieve accurate cooling of the manure ditches and reduce resource waste. Further, the cooling pipelines 1530 in each manure ditch are arranged separately or in parallel.

[0038] As Figures 5 - 11 shown, the manure and urine basin 1100 includes a basin body. A manure receiving tray 1110 for receiving manure and urine and a manure storage tank 1120 connected to the manure receiving tray 1110 are arranged at the inner bottom of the basin body. The manure receiving tray 1110 is inclined downward relative to the manure storage tank 1120. A temperature reduction part for reducing the temperature of the manure and urine on the manure receiving tray 1110 is arranged inside the manure receiving tray 1110. An inlet 1131 and an outlet 1132 for communicating with the temperature reduction part are arranged on the basin body corresponding to the temperature reduction part. A manure outlet 1121 is arranged in the manure storage tank 1120. In the manure and urine basin 1100, the temperature reduction part is arranged. Low-temperature water enters from the inlet 1131, flows through the inside of the temperature reduction part, and is discharged from the outlet 1132, taking away the heat in the manure and urine, reducing the volatilization of ammonia, reducing the emission of odor, and improving the air quality of the pigsty. By reasonably distributing the position of the temperature reduction part, the low-temperature water can take away the heat in the manure to the greatest extent. The temperature reduction part is arranged closely inside the manure receiving tray 1110, and the diameter of the temperature reduction part can be set to a larger size to increase the contact area between the low-temperature water and the manure and urine, ensuring that the low-temperature water in the temperature reduction part fully absorbs the heat in the manure and urine. In addition, since the temperature reduction part is located inside the basin body of the manure and urine basin 1100, the overall structure of the manure and urine basin 1100 is compact, reducing the civil engineering cost brought by laying pipelines and facilitating later maintenance. The temperature reduction part can be an independently arranged temperature reduction pipeline or a temperature reduction cavity integrally designed with the manure and urine basin 1100.

[0039] Further, the cooling part is inclined along the direction in which the feces and urine slide down on the feces receiving tray 1110. Further, a diversion groove 1111 extending to the manure storage tank 1120 is provided on the upper surface of the feces receiving tray 1110. At least one diversion groove 1111 is provided and the diversion grooves 1111 are evenly arranged along the upper surface of the feces receiving tray 1110, and adjacent diversion grooves 1111 communicate with each other. The purpose of setting the diversion groove 1111 is to smoothly collect feces and urine. Further, the cooling part 1130 is provided corresponding to each diversion groove 1111 and the overall structure of the cooling part is serpentine, and the water inlet and the water outlet are located at both ends of the serpentine cooling part 1130. Through the reasonable layout of the cooling part 1130 inside the feces receiving tray 1110, the low-temperature water in the cooling part 1130 can take away the heat in the feces and urine to the greatest extent, improving the cooling efficiency. The cooling part 1130 laid along the diversion groove 1111 inside the feces receiving tray 1110 fully cools the feces and urine collected in the diversion groove 1111, improves the cooling efficiency of the cooling part 1130, and ensures that the cooled feces and urine can smoothly transition to the manure storage tank 1120 along the first diversion groove 1111. Preferably, the distance between adjacent parts of the cooling part 1130 is 360 mm, and the diameter of the cooling part 1130 is 20 mm. Its function is to make full use of the bottom space to ensure the passage of a large amount of water, while preventing the problem of excessive water outlet resistance caused by too dense arrangement. Further, the inclination angle of the feces receiving tray 1110 relative to the manure storage tank 1120 is 1-5°, which can ensure that the feces and urine in the feces receiving tray 1110 can slide down, while avoiding the reduction of the cooling efficiency of the cooling part 1130 caused by too large an inclination angle design and too fast a sliding speed of the feces and urine. Further, the shape of the manure storage tank 1120 is funnel-shaped, and the manure outlet 1121 is located at the center of the bottom of the manure storage tank 1120, ensuring that the feces and urine can smoothly enter the manure outlet 1121. Further, the inclination angle of the circumference of the manure storage tank 1120 from top to bottom to the center of the circle is 5-10°, providing a suitable sliding speed for the feces and urine on the manure storage tank. Through the inclination of the feces receiving tray 1110 and the inclination setting of the diversion groove 1111, the feces and urine can be smoothly introduced to the manure outlet 1121 and connected through the sewage suction pipe 1300 connected to the manure outlet 1121. Specifically, the thickness of the feces and urine basin 1100 is 4.5 mm, ensuring its mechanical properties. Further, the feces and urine basin 1100 is a plastic feces and urine basin 1100. The plastic material has better heat conduction performance than cement in the prior art, improves the cooling efficiency of the cooling part 1130, reduces the odor emission, and saves other deodorization costs of the subsequent pigsty. Preferably, the material of the feces and urine basin 1100 is polyethylene material, which has good corrosion resistance and weather resistance, and at the same time has low cost and low noise, which is beneficial to the growth of livestock and poultry. Preferably, a plurality of strengthening ribs are provided on the peripheral side walls and the outer surface of the bottom of the basin body, and the strengthening ribs are evenly distributed on the peripheral side walls and the outer surface of the bottom of the basin body to increase the overall strength of the feces and urine basin 1100 and make it not easy to deform.Preferably, one side wall of the basin body extends outward and bends to form a pulling plate 1150, which is used to pull the feces and urine basin 1100, making it more convenient to take and place the feces and urine basin 1100.

[0040] A feces and urine receiving device includes the above-mentioned feces and urine basin 1100. A joint for connecting the cooling parts 1130 of adjacent feces and urine basins 1100 is provided on the cooling part 1130 of the feces and urine basin 1100. A plurality of feces and urine basins 1100 are provided, and the cooling parts 1130 of each feces and urine basin 1100 are connected in series through the joints. The feces outlet 1121 of the feces and urine basin 1100 is connected with a sewage suction pipe 1300, and the feces outlets 1121 of adjacent feces and urine basins 1100 are connected in series through the sewage suction pipe 1300. Connecting multiple feces and urine basins 1100 realizes the series connection of the low-temperature water circuit, so as to concentrate and take away the heat in multiple feces and urine basins 1100, improve the cooling efficiency, and facilitate intensive treatment. Further, a feces discharge port is provided on the sewage suction pipe 1300, and a control switch for controlling the opening and closing of the feces discharge port on the sewage suction pipe 1300 is provided on the sewage suction pipe 1300. Preferably, the control switch is a solenoid valve 1310, which improves the automatic control of feces and urine discharge and reduces the frequency of personnel operation. Specifically, the joint is a quick-installation joint, which is convenient for connecting between the cooling parts 1130 of adjacent feces and urine basins 1100. Specifically, two quick-installation joints are provided corresponding to the water inlet 1131 and the water outlet 1132 of the cooling part 1130 respectively. One of the two quick-installation structures is a quick-installation joint female head 1410, and the other is a quick-installation joint male head 1420.

[0041] During the actual application in the pig farm, the feces and urine basin 1100 is arranged in the corresponding pen 1200 of the pig house. Since a single feces and urine basin 1100 is independently installed, the construction difficulty is reduced, and the civil engineering construction cost is also greatly reduced. The feces and urine basins 1100 in adjacent pens 1200 are placed side by side. The feces outlet 1121 of the feces and urine basin 1100 is connected with the sewage suction pipe 1300, and the feces outlets 1121 of adjacent feces and urine basins 1100 are connected in series through the sewage suction pipe 1300. The cooling parts 1130 of adjacent feces and urine basins 1100 are connected in series, so that the heat in multiple feces and urine basins 1100 can be concentrated and taken away by using one cooling part 1130, realizing integrated treatment. The sewage suction pipe 1300 is a polyvinyl chloride sewage suction pipe, and its diameter is preferably 160 mm. A solenoid valve 1310 or other control switch is provided on the sewage suction pipe 1300. After the feces and urine basin 1100 is used for a period of time, feces are automatically discharged through the solenoid valve 1310, ensuring that the feces and urine basin 1100 is mainly concentrated in the sewage suction pipe 1300, reducing the exposed area of feces and urine, or feces are discharged through manual operation. By using this feces and urine basin 1100, the air quality of the pig house is further improved, the ammonia emission is reduced, the nitrogen volatilization is reduced, the fertilizer efficiency is enhanced, and the sewage treatment volume is reduced.

[0042] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and cannot limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. A system for reducing ammonia emissions by using groundwater, characterized in that, it includes a manure tank cooling system for absorbing manure energy through groundwater, a water pump system for pumping groundwater to the manure tank cooling system, and a pipeline system for transporting groundwater, and the pipeline system connects the manure tank cooling system and the water pump system; the manure tank cooling system includes a self-cooling manure tank with a circulation pipeline and / or a manure urine basin with a cooling device; the self-cooling manure tank includes a manure tank body and a pipeline, the pipeline is filled with water, the pipeline is separably placed in the manure tank body, and floating fins are arranged on the pipeline for making the pipeline float up and down with the liquid level of the manure sludge in the manure tank body; the manure urine basin includes a basin body, a manure receiving tray for receiving manure and urine is arranged at the inner bottom of the basin body and a manure storage tank connected to the manure receiving tray, and the manure receiving tray is inclined downward from top to bottom relative to the manure storage tank; the inclination angle of the manure receiving tray relative to the manure storage tank is 1° - 5°; a cooling part for reducing the temperature of the manure and urine on the manure receiving tray is arranged inside the manure receiving tray, a water inlet and a water outlet communicating with the cooling part are arranged on the basin body corresponding to the cooling part, and a manure outlet is arranged in the manure storage tank; wherein, the shape of the manure storage tank is funnel-shaped, the manure outlet is located at the center of the bottom of the manure storage tank, and the inclination angle of the circumference of the manure storage tank from top to bottom to the center is 5° - 10°.

2. The system for reducing ammonia emissions by using groundwater according to claim 1, characterized in that: it further includes a heat exchange system for recovering the manure energy in the manure tank cooling system, and the heat exchange system is connected to the manure tank cooling system through the pipeline system.

3. The system for reducing ammonia emissions by using groundwater according to claim 2, characterized in that: the heat exchange system includes a cooling tower.

4. The system for reducing ammonia emissions by using groundwater according to claim 2, characterized in that: the pipeline system includes multiple parallel pipelines, and a pipeline control switch is arranged on each pipeline.

5. The system for reducing ammonia emissions by using groundwater according to claim 4, characterized in that: it further includes a control system, and the control system is respectively and controllably connected to the pipeline system, the heat exchange system and the water pump system.

6. The system for reducing ammonia emissions by using groundwater according to claim 1, characterized in that: the self-cooling manure tank further includes a manure leakage floor, and the manure leakage floor is laid above the manure tank body.

7. The system for reducing ammonia emissions by using groundwater according to claim 1, characterized in that: a diversion groove extending to the manure storage tank is arranged on the upper surface of the manure receiving tray, at least one diversion groove is arranged, and the diversion grooves are evenly arranged on the upper surface of the manure receiving tray, and adjacent diversion grooves are communicated with each other.

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