A device for reducing emissions of acidified gas from livestock manure in livestock pens

Abstract

This utility model discloses a manure acidification gas emission reduction device for livestock pens, relating to the field of waste gas treatment technology. It includes an acid solution preparation system, a pressure regulation system, and a spraying system. The acid solution preparation system stores the acid solution and supplies it to the pressure regulation system and the spraying system. The pressure regulation system drives the acid solution from the acid solution preparation system sequentially into the main control valve and the main spraying pipe. Spraying branch pipes are horizontally suspended in manure collection tanks at the bottom of the pens. Each spraying branch pipe is equipped with multiple spray heads, which spray the acid solution into the manure collection tanks. This manure acidification gas emission reduction device for livestock pens reduces ammonia emissions from the pens, improving the living environment for animals and staff. Through this manure acidification device, automatic acidification of the manure surface can be achieved, while simultaneously achieving precise gas emission reduction, reducing manual labor and saving labor costs.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a device for reducing emissions of acidified gas from livestock manure in livestock pens. Background Technology

[0002] In recent years, the number of livestock and poultry farms in China has remained high, generating and discharging livestock and poultry manure during the farming process. The management of manure in livestock pens releases large amounts of ammonia, making China one of the world's major ammonia emitters. Statistics show that China's annual ammonia emissions account for approximately 18% of global emissions, with livestock production accounting for over 50% of the country's total. Large-scale ammonia emissions are a major cause of smog and also contribute to environmental problems such as nitrate pollution and coastal eutrophication. Therefore, given the difficulty in treating and controlling ammonia emissions from livestock pens, it is crucial to explore methods to reduce ammonia volatilization without affecting farm operations and animal health.

[0003] Manure acidification is an effective method to slow down ammonia volatilization. Currently, the acidic substances used for ammonia reduction in manure acidification mainly fall into three categories: strong acids, weak acids, and weak acid salts, such as sulfuric acid, phosphoric acid, lactic acid, carboxycarboxylic acid, sodium bisulfate, and aluminum sulfate. Internationally, there has been extensive research on ammonia emission reduction involving aspects such as livestock pens, storage, and manure application, and the ammonia emission reduction effect of manure acidification has received widespread attention and confirmation. However, given the diverse types of livestock and the complex systems in my country's livestock farming, there are currently no reports on ammonia emission reduction technologies and equipment that are compatible with the livestock pen environment and processes. Therefore, developing simple and efficient ammonia volatilization reduction technologies and equipment is of great significance for promoting the green development of my country's livestock and poultry farming industry. Utility Model Content

[0004] The purpose of this invention is to provide a gas emission reduction device for acidifying manure and urine in livestock pens, in order to solve the problems existing in the prior art. This device reduces ammonia emissions from manure and urine by acidifying manure and urine in situ, thereby reducing the ammonia concentration in the pens, improving the animal breeding environment, reducing labor output, and saving labor costs.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a manure and urine acidification gas reduction device for livestock pens, including an acid solution preparation system, a pressure regulation system, and a spraying system. The acid solution preparation system is used to store the acid solution and supply it to the pressure regulation system and the spraying system. The spraying system includes a main control valve, a distributor, a main spray pipe, branch spray pipes, and spray heads. The pressure regulation system is used to drive the acid solution from the acid solution preparation system into the main control valve and the main spray pipe in sequence. The main spray pipe is connected to the branch spray pipes through the distributor. The branch spray pipes are horizontally suspended in the manure and urine collection tank at the bottom of the pen. Each branch spray pipe is equipped with multiple spray heads, and each spray head is used to spray the acid solution into the manure and urine collection tank.

[0006] In one embodiment, the acidic solution preparation system includes a stock solution tank and a storage tank. The stock solution tank is connected to the top of the storage tank, and the stock solution tank stores acid. An inlet valve and an overflow pipe are respectively provided in the upper part of the storage tank, and an outlet pipe is provided in the lower part of the storage tank. An outlet valve is provided on the outlet pipe. The pressure regulating system connects the outlet valve and the main control valve.

[0007] In one embodiment, a liquid level tube is provided on the outside of the liquid storage tank, which connects the upper and lower ends of the liquid storage tank. The liquid level tube is used to display the liquid level height inside the liquid storage tank.

[0008] In one embodiment, the acidic solution preparation system further includes a pH meter, which is installed in the storage tank and is used to measure the pH value of the solution in the storage tank.

[0009] In one embodiment, solenoid valves are respectively installed at the outlet of the raw liquid tank and the inlet of the inlet valve.

[0010] In one embodiment, the pressure regulating system includes a booster pump and a frequency converter, wherein the inlet of the booster pump is connected to an outlet valve, and the outlet of the booster pump is connected to the main control valve of the spray system.

[0011] In one embodiment, a pressure sensor is provided at the tail end of each of the spray branch pipes, and the pressure sensor is used to dynamically monitor the pressure at the tail end of each spray branch pipe.

[0012] In one embodiment, each of the spray branch pipes is provided with a unit controller at one end of its liquid inlet. Each unit controller is controlled independently and is used to control whether each spray branch pipe sprays an acidic solution.

[0013] In one embodiment, each of the spray branch pipes is provided with a spray sub-pipe in sections, and each spray sub-pipe is provided with a sub-control valve, which is used to adjust the segmented spraying of the spray branch pipe.

[0014] In one embodiment, the spray branch pipes are arranged parallel to each other, and the multiple spray heads on each spray branch pipe are arranged at equal intervals. The positions of the spray heads on two adjacent spray branch pipes are staggered, and each spray head is arranged facing downwards.

[0015] The present invention achieves the following beneficial technical effects compared to the prior art:

[0016] The present invention relates to a livestock pen manure acidification gas reduction device, comprising an acid solution preparation system, a pressure regulation system, and a spraying system. The acid solution preparation system stores the acid solution and supplies it to the pressure regulation system and the spraying system. The spraying system includes a main control valve, a distributor, a main spray pipe, branch spray pipes, and spray heads. The pressure regulation system drives the acid solution from the acid solution preparation system into the main control valve and the main spray pipe in sequence. The main spray pipe is connected to the branch spray pipes via the distributor. The branch spray pipes are horizontally suspended in the manure collection tank at the bottom of the pen. Each branch spray pipe is equipped with multiple spray heads, each spray head being used to spray the acid solution into the manure collection tank. The acidic solution is driven from the acidic solution preparation system to the supply spray system by the pressure regulation system, and then flows into each spray main and branch pipe through the distributor. The acidic solution is then sprayed onto the surface of the feces and urine under the slatted floor of the enclosure through the nozzles on the branch pipes, acidifying the feces and urine, thereby reducing the ammonia emissions in the enclosure and improving the living environment for animals and staff. This feces and urine acidification device can achieve automatic acidification of the feces and urine surface, while also achieving precise gas emission reduction, reducing manual labor and saving labor costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A diagram showing the components of a manure acidification gas reduction device for livestock pens.

[0019] Figure 2 A distribution diagram of the gas emission reduction devices for acidification of manure and urine in livestock pens;

[0020] Figure 3 This is a structural distribution diagram of the sprinkler system;

[0021] Figure 4 Side view of the installation location of the sprinkler branch pipe inside the fecal collection tank;

[0022] The system includes: 1. Acidic solution storage and conditioning system; 2. Pressure regulation system; 3. Spraying system; 4. Raw material tank; 5. Inlet valve; 6. Level pipe; 7. pH meter; 8. Storage tank; 9. Overflow pipe; 10. Outlet pipe; 11. Outlet valve; 12. Booster pump; 13. Frequency converter; 14. Distributor; 15. Unit controller; 16. Pressure sensor; 17. Main control valve; 18. Distributor; 19. Main spray pipe; 20. Branch spray pipe; 21. Sub-control valve; 22. Spray branch pipe; 23. Spray head; 24. Manure collection tank; 25. Slatted floor; 26. Manure scraper. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The purpose of this invention is to provide a device for reducing ammonia emissions from manure and urine in livestock pens, thereby solving the problems existing in the prior art. This device reduces ammonia emissions from manure and urine by acidifying them in situ, thereby lowering the ammonia concentration in the pens, improving the animal husbandry environment, and enhancing animal welfare.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-4 As shown, this utility model provides a device for precise emission reduction of acidified gas from manure in livestock pens, including an acid solution modulation system 1, a pressure regulating system 2, and a spraying system 3. The acid solution modulation system 1 is used to store the acid solution and supply it to the pressure regulating system 2 and the spraying system 3. The pressure regulating system 2 includes a pressurizing pump 12 and a frequency converter 13. The spraying system 3 includes a main control valve 17, a branch valve 18, a main spray pipe 19, a branch spray pipe 20, a sub-control valve 21, a spray branch pipe 22, and a spray head 23. The pressure regulating system 2 can drive the acidic solution from the acidic solution conditioning system 1 into the main control valve 17 and the main spray pipe 19. The main spray pipe 19 is connected to the spray branch pipe 20 through the splitter 18. The spray branch pipe 20 and the spray sub-pipe 22 are horizontally suspended in the manure collection tank 24 at the bottom of the pen. Each spray branch pipe 20 is equipped with multiple spray heads 23. Each spray head 23 is used to spray the acidic solution into the manure collection tank 24.

[0027] When acidification of manure and urine in the pen is required, the pressure regulating system 2 is activated. The pressure regulating system 2 drives the acidic solution from the acidic solution modulation system 1 through the main control valve 17 to the distributor 18, and then through the distributor 18 to each spray branch pipe 20. The acidic solution is then sprayed onto the manure and urine in the manure and urine collection tank 24 through the spray head 23 on the spray branch pipe 20 to acidify the manure and urine, thereby reducing the ammonia emissions in the pen and improving the living environment for animals and staff. With this manure and urine acidification gas reduction device, manual spraying for manure and urine acidification is not required, reducing labor output and saving labor costs.

[0028] like Figure 2 As shown, in this embodiment, the acidic solution preparation system 1 includes a raw solution tank 4, an inlet valve 5, a level pipe 6, a pH meter 7, a storage tank 8, an overflow pipe 9, an outlet pipe 10, and an outlet valve 11. The raw solution tank 4, inlet valve 5, and overflow pipe 9 are located on the upper part of the storage tank 8, while the level pipe 6, outlet pipe 10, and outlet valve 11 are located on the lower part of the storage tank 8. Water can be injected into the storage tank 8 through the inlet valve 5. The raw solution tank 4 stores a high-concentration acid solution, and the pH of the solution in the storage tank 8 can be monitored by the pH meter 7. The pressure regulating system 2 connects the outlet valve 11 to the main control valve 17. The pressure regulating system 2 can drive the acidic liquid through the main control valve 17 from the main spray pipe 19 into the spray branch pipe 20. The spray branch pipe 20 is connected to the main spray pipe 19 through a splitter 18. Spray head 23 is installed on the spray branch pipe 20. When it is necessary to acidify the feces and urine, the liquid outlet valve 11 is opened, the pressure regulating system 2 is started, and the acidic liquid is driven from the liquid outlet pipe 10 into the distributor 14 and sprayed onto the feces and urine through the spray head 23 on the spray branch pipe 20.

[0029] like Figure 2 As shown, in this embodiment, a liquid level pipe 6 is provided on the outside of the liquid storage tank 8, which connects the upper and lower ends of the liquid storage tank 8. The height of the liquid level pipe 6 is slightly less than the height of the liquid storage tank 8. The liquid level height in the liquid storage tank 8 can be observed intuitively through the liquid level pipe 6, and the liquid can be added in time when the liquid is insufficient.

[0030] like Figure 2As shown, in this embodiment, a pH meter 7 is installed inside the storage tank 8. The pH meter 7 is connected to the raw liquid tank 4 and the inlet valve 5 via a pH contactor. Solenoid valves are installed at the outlet of the raw liquid tank 4 and the inlet of the inlet valve 5, respectively. The opening and closing of the two solenoid valves are adjusted based on the difference between the pH measured by the pH meter 7 and the pH value set at the control center (this control center can be a conventional PLC controller, a mature technology that will not be elaborated further here). Both the solenoid valves and the control center are conventional technologies, as is the connection method. Adjusting the on / off state of the solenoid valves through feedback from the control center is also a conventional technique. An outlet pipe 10 is installed at the bottom of the storage tank 8, and an outlet valve 11 is installed on the outlet pipe 10. An overflow pipe 9 is installed at the top of the storage tank 8. When the liquid level in the storage tank 8 is too high due to control issues, the liquid can flow out through the overflow pipe 9.

[0031] like Figure 2 As shown, in this embodiment, the pressure regulating system 2 includes a pressurizing pump 12 and a frequency converter 13. The inlet of the pressurizing pump 12 is connected to the outlet valve 11, and the outlet of the pressurizing pump 12 is connected to the main control valve 17 of the spray system 3. A pressure sensor 16 is installed at the tail end of the spray system 3. By dynamically monitoring the pressure at the tail end of the spray system 3, the frequency of the frequency converter 13 in the pressure regulating system 2 is automatically adjusted to ensure the stability of the acid pressure in the spray system 3.

[0032] like Figures 2-3 As shown, in this embodiment, each spray branch pipe 20 is equipped with a unit controller 15 at one end of its liquid inlet. Each unit controller 15 can be controlled independently to control whether each spray branch pipe 20 sprays an acidic solution, thereby achieving spray control of different areas of the enclosure.

[0033] Specifically, each spray branch pipe 20 is equipped with a segmented spray sub-pipe 22, and each spray sub-pipe 22 is equipped with a sub-control valve 21. The segmented spraying of the spray branch pipe 20 can be controlled by adjusting the opening and closing of the sub-control valve 21 to meet the emission reduction requirements of different breeding areas in the slatted floor breeding process. The pressure sensor 16, frequency converter 13, unit controller 15, and sub-control valve 21 are all electrically connected to the aforementioned control center. The pressure sensor 16, frequency converter 13, unit controller 15, and sub-control valve 21 are all existing mature equipment components. Their connection methods with the control center, as well as their feedback and control methods, are conventional technical choices in the existing technology and will not be elaborated further here.

[0034] like Figures 3-4As shown, the spray branch pipes 20 are arranged parallel to each other, and the multiple spray heads 23 on each spray branch pipe 20 are equally spaced. The spray heads 23 on adjacent spray branch pipes 20 are staggered, and all spray heads 23 are downward-facing. The spray branch pipes 20 are installed inside the manure collection tank 24 of the pen and are located 5cm below the slatted floor 25 and 10cm above the scraper 26. The spraying process will not affect the normal operation of the farm or the health of the animals. A spray head 23 is installed every 50cm, and the spray flow rate of the spray head 23 is 1L / min, thereby controlling the acidic solution to maintain a constant spraying rate. The spacing between two adjacent spray branch pipes 20 can be adjusted according to the radiation range of the acidic solution sprayed by the spray head 23, so as to evenly spray the acidic solution onto the manure.

[0035] The process of acidifying manure and urine using the precise emission reduction device for manure and urine acidification in this embodiment is as follows:

[0036] 1) The operator determines the amount of acid to be sprayed based on the type of acidifying agent, the reduction of ammonia emissions after acidification, and the moisture content of feces and urine.

[0037] 2) Set the pH meter to adjust the target pH to 2-3. The contactor on the pH meter automatically controls the opening ratio of the liquid in the stock solution tank 4 and the inlet valve 5 to adjust the solution pH to the target pH range.

[0038] Open the outlet valve 11;

[0039] 4) The working time, working interval and spraying pressure of each spray branch pipe 20 are set by the frequency converter 13;

[0040] 5) Start the pressurization pump 12 to perform automatic acid spraying.

[0041] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A device for reducing emissions of acidified gas from livestock manure in livestock pens, characterized in that: It includes an acidic solution preparation system, a pressure regulation system, and a spraying system, wherein the acidic solution preparation system is used to store the acidic solution and supply the acidic solution to the pressure regulation system and the spraying system; The sprinkler system includes a main control valve, a distributor, a main sprinkler pipe, branch sprinkler pipes, and sprinkler heads. The pressure regulating system is used to drive the acidic solution from the acidic solution preparation system into the main control valve and the main sprinkler pipe in sequence. The main sprinkler pipe is connected to the branch sprinkler pipes through the distributor. The branch sprinkler pipes are horizontally suspended in the manure collection tank at the bottom of the pen. Each branch sprinkler pipe is equipped with multiple sprinkler heads, and each sprinkler head is used to spray the acidic solution into the manure collection tank.

2. The livestock pen manure acidification gas emission reduction device according to claim 1, characterized in that: The acidic solution preparation system includes a stock solution tank and a storage tank. The stock solution tank is connected to the top of the storage tank, and the stock solution tank stores acid. The upper part of the storage tank is provided with an inlet valve and an overflow pipe, and the lower part of the storage tank is provided with an outlet pipe and an outlet valve. The pressure regulating system connects the outlet valve and the main control valve.

3. The livestock pen manure acidification gas emission reduction device according to claim 2, characterized in that: The outside of the liquid storage tank is equipped with a liquid level pipe that connects the upper and lower ends of the liquid storage tank. The liquid level pipe is used to display the liquid level height inside the liquid storage tank.

4. The livestock pen manure acidification gas emission reduction device according to claim 2, characterized in that: The acidic solution preparation system also includes a pH meter, which is installed in the storage tank and is used to measure the pH value of the solution in the storage tank.

5. The livestock pen manure acidification gas emission reduction device according to claim 4, characterized in that: The raw material tank is equipped with solenoid valves at the outlet and the inlet of the inlet valve.

6. The livestock pen manure acidification gas emission reduction device according to claim 2, characterized in that: The pressure regulating system includes a booster pump and a frequency converter. The inlet of the booster pump is connected to the outlet valve, and the outlet of the booster pump is connected to the main control valve of the spray system.

7. The livestock pen manure acidification gas emission reduction device according to claim 1, characterized in that: Each of the spray branch pipes is equipped with a pressure sensor at its tail end, and the pressure sensor is used to dynamically monitor the pressure at the tail end of each spray branch pipe.

8. The livestock pen manure acidification gas emission reduction device according to claim 1, characterized in that: Each of the spray branch pipes is equipped with a unit controller at one end of its liquid inlet. Each unit controller is controlled independently and is used to control whether each spray branch pipe sprays an acidic solution.

9. The livestock pen manure acidification gas emission reduction device according to claim 1, characterized in that: Each of the spray branch pipes is provided with a spray sub-pipe in sections, and each spray sub-pipe is provided with a sub-control valve, which is used to adjust the segmented spraying of the spray branch pipe.

10. The livestock pen manure acidification gas emission reduction device according to claim 1, characterized in that: Each of the spray branch pipes is arranged parallel to each other, and multiple spray heads on each spray branch pipe are arranged at equal intervals. The positions of the spray heads on two adjacent spray branch pipes are staggered, and each spray head is set downwards.

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