CN118663023A - Waste gas treatment device for livestock manure fermentation bin - Google Patents

Abstract

The present application relates to the technical field of waste gas treatment equipment, and in particular to a waste gas treatment device for livestock and poultry manure fermentation warehouses, including a manure fermentation warehouse, a gas separation warehouse and a gas collection mechanism, an air pump is connected between the manure fermentation warehouse and the gas separation warehouse, the air pump is electrically connected to the control system, a separation mechanism for separating ammonia and hydrogen sulfide is provided on the gas separation warehouse, the separation mechanism includes a cooling pipe and a temporary storage box provided in the gas separation warehouse, a refrigeration component for cooling the cooling pipe and the temporary storage box is provided on the gas separation warehouse, one end of the cooling pipe is connected to the air pump, and the other end is connected to the temporary storage box, the top and bottom of the temporary storage box are respectively connected to an exhaust pipe and a drain pipe, and the gas collection mechanism includes an ammonia collection tank group connected to the drain pipe and a sulfur absorption tank connected to the drain pipe. The present application has the effect of improving the utilization rate of ammonia and hydrogen sulfide.

Description

A waste gas treatment device for livestock and poultry manure fermentation bin

Technical Field

The present application relates to the technical field of waste gas treatment equipment, and in particular to a waste gas treatment device for livestock and poultry manure fermentation bins.

Background Art

The fermentation of livestock and poultry manure is an important biochemical process, also known as manure composting. It is a way to treat manure harmlessly. Through the action of microorganisms and suitable environmental conditions, organic matter can be fully decomposed to produce organic fertilizers and other useful compounds, which play an important role in improving soil fertility and promoting plant growth. However, a large amount of waste gas will be generated during the fermentation of livestock and poultry manure. The main components of these waste gases are harmful gases such as ammonia and hydrogen sulfide. Random discharge will have a serious impact on the environment and human health.

A Chinese invention patent with announcement number CN107754579A discloses a waste gas treatment system and method for aquaculture farms, including a biological water curtain device, which is arranged at the waste gas discharge port and is used to absorb and degrade hydrophilic substances in the waste gas; a biological oxidation device, which is connected to the biological water curtain device and is used to absorb and oxidize ammonia, hydrogen sulfide and organic matter discharged from the biological water curtain device.

During use, the ammonia absorbed by the biological water curtain is directly degraded in the biological oxidation device. Ammonia is one of the important nitrogen fertilizer raw materials. The above equipment does not recycle and reuse ammonia, which wastes ammonia resources and has shortcomings.

Summary of the invention

In order to utilize ammonia in fermentation waste gas, the present application provides a waste gas treatment device for a livestock and poultry manure fermentation bin.

The waste gas treatment device for livestock and poultry manure fermentation bin provided in the present application adopts the following technical solution:

A waste gas treatment device for a livestock and poultry manure fermentation bin, comprising a manure fermentation bin, a gas separation bin and a gas collection mechanism, wherein an air pump is connected between the manure fermentation bin and the gas separation bin, the air pump is electrically connected to a control system, the gas separation bin is provided with a separation mechanism for separating ammonia and hydrogen sulfide, the separation mechanism comprises a cooling pipe and a temporary storage box arranged in the gas separation bin, the gas separation bin is provided with a refrigeration component for cooling the cooling pipe and the temporary storage box, one end of the cooling pipe is connected to the air pump, and the other end is connected to the temporary storage box, the top and bottom of the temporary storage box are respectively connected to an exhaust pipe and a drain pipe, and the gas collection mechanism comprises an ammonia collecting tank group connected to the drain pipe and a sulfur absorption tank connected to the drain pipe.

By adopting the above technical solution, workers start the air pump through the control system, and the air pump draws the gas in the feces fermentation bin into the cooling pipe. Under the cooling effect of the refrigeration component, the cooling pipe and the temporary storage box are cooled to about minus 34°. At this time, the ammonia has been liquefied and the hydrogen sulfide is still in a gaseous state. The liquefied ammonia flows through the drain pipe to the ammonia collection tank group, and the hydrogen sulfide flows through the exhaust pipe to the sulfur absorption tank, thereby realizing the separation of ammonia and hydrogen sulfide. At the same time, ammonia and hydrogen sulfide are collected for reuse, which is beneficial to improve the utilization rate of ammonia.

Optionally, the refrigeration component includes a refrigerant contained in a gas separation chamber, a refrigerator electrically connected to a control system is provided on the gas separation chamber, and the cooling pipe and the temporary storage box are both immersed in the refrigerant.

By adopting the above technical solution, workers start the refrigerator through the control system. The refrigerator cools the refrigerant in the gas separation chamber to about minus 34°C, and liquefies and separates the mixed gas in the cooling pipe and the temporary storage box through heat transfer, thereby achieving the separation of ammonia and hydrogen sulfide.

Optionally, the drain pipe is connected to a three-way valve electrically connected to a control system, the ammonia collecting tank group includes a nitrification ammonia tank and a carbonization ammonia tank, the nitrification ammonia tank and the carbonization ammonia tank are both connected to an exhaust valve and a drain valve electrically connected to the control system, the nitrification ammonia tank and the carbonization ammonia tank are respectively connected to two outlet ends of the three-way valve, the nitrification ammonia tank is filled with nitric acid solution, and the carbonization ammonia tank is filled with carbonic acid solution.

By adopting the above technical solution, workers start the three-way valve through the control system to make the liquefied ammonia gas in the temporary storage box flow to the nitrification ammonia tank or the carbonization ammonia tank. The liquefied ammonia gas in the nitrification ammonia tank reacts with the nitric acid solution to produce ammonium nitrate, and the liquefied ammonia gas in the carbonization ammonia tank reacts with the carbonic acid solution to produce ammonium carbonate. Both ammonium nitrate and ammonium carbonate are the main components of nitrogen fertilizer. In this way, harmful gases in the feces fermentation bin can be treated, and the products produced will increase the factory's income.

Optionally, a transfer tank is provided between the nitrification ammonia tank and the carbonization ammonia tank, a first conduit is connected between the bottom of the transfer tank and the top of the nitrification ammonia tank, and a second conduit is connected between the top of the transfer tank and the bottom of the carbonization ammonia tank.

By adopting the above technical scheme, there will be a large amount of carbon dioxide gas in the feces fermentation bin, and at a temperature of about minus 34°, the carbon dioxide will liquefy, and the liquefied ammonia gas in the nitrification ammonia tank reacts with the nitric acid solution to generate heat, causing the liquefied carbon dioxide to precipitate into gas, and the gaseous carbon dioxide flows to the transfer tank through the first conduit, and flows to the carbonization ammonia tank through the second conduit, so that the carbon dioxide content in the carbonization ammonia tank is increased, so that ammonium bicarbonate is mainly generated in the carbonization ammonia tank, and ammonium bicarbonate has higher heat resistance than ammonium carbonate, which is conducive to the subsequent transportation of ammonia salts. At the same time, the transfer tank reduces the possibility of direct contact between the solutions in the nitrification ammonia tank and the carbonization ammonia tank.

Optionally, a one-way valve is provided on the exhaust pipe, the sulfur absorption tank is filled with carbon tetrachloride solvent and sodium hydroxide solution, the gas outlet end of the exhaust pipe extends to the carbon tetrachloride solvent layer in the sulfur absorption tank, and the sulfur absorption tank is connected to a liquid adding pipe and a pressure relief pipe.

By adopting the above technical solution, since the density of the carbon tetrachloride solvent is greater than the density of the sodium hydroxide solution, and the carbon tetrachloride solvent and the sodium hydroxide solution are immiscible, the hydrogen sulfide gas diffuses from the carbon tetrachloride solvent into the sodium hydroxide solution, so that the hydrogen sulfide gas fully reacts with the sodium hydroxide solution to obtain sodium sulfide, and sodium sulfide is an important industrial alkali, which is beneficial to improving the utilization rate of hydrogen sulfide.

Optionally, a sulfur collecting tank is arranged next to the sulfur absorption tank, and a sulfur passing pipe is connected between the sulfur collecting tank and the sulfur absorption tank, and the sulfur passing pipe is used to flow the solution in the sulfur absorption tank to the sulfur collecting tank, and a two-way water pump electrically connected to the control system is arranged on the sulfur passing pipe, and a partition is arranged in the sulfur collecting tank, and the partition divides the upper part of the liquid in the sulfur collecting tank into two cavities, and a cathode plate and an anode plate electrically connected to the control system are arranged in the sulfur collecting tank, and the partition is located between the cathode plate and the anode plate, and a hydrogen discharge pipe is connected to the sulfur absorption tank in the cavity where the cathode plate is located.

By adopting the above technical solution, workers supply power to the cathode plate and the anode plate through the control system, so that the sulfur in the sodium sulfide adheres to the anode plate, and a large amount of hydrogen is generated on the cathode plate, which is discharged to the external collection box through the hydrogen exhaust pipe. At the same time, a large amount of sodium hydroxide is generated in the sulfur collecting tank. After the electrolysis is completed, the workers start the two-way water pump through the control system. The blades of the two-way water pump rotate forward and reversely, so that the sodium hydroxide solution in the sulfur collecting tank flows to the sulfur absorption tank, and the sodium sulfide solution in the sulfur absorption tank flows to the sulfur collecting tank, so as to achieve sodium balance. The workers only need to collect the sulfur solids on the anode plate later, and the sulfur solids are easier to transport and carry than the sodium sulfide solution.

Optionally, a plate changing slot is provided on the sulfur absorption tank in the cavity where the anode plate is located, a sealing plate is detachably provided on the plate changing slot of the sulfur absorption tank, a rotating motor electrically connected to a control system is provided on the sulfur absorption tank, an insulating rod is coaxially provided on the output shaft of the rotating motor, the insulating rod rotates and extends into the sulfur absorption tank and is provided with a conversion disk, and the anode plate is detachably provided on the conversion disk.

By adopting the above technical solution, after the anode plate is powered on for a period of time, the worker starts the rotating motor through the control system, and the rotating motor drives the conversion disk to rotate. Then the worker opens the sealing plate and replaces the anode plate, thereby facilitating the collection process of sulfur solids.

Optionally, the sulfur-passing pipe is made of insulating material, and a gate valve electrically connected to the control system is provided on the sulfur-passing pipe and between the two-way water pump and the sulfur absorption tank, and a valve plate of the gate valve is made of insulating material.

By adopting the above technical solution, before the anode plate and the cathode plate are energized, the worker starts the gate valve through the control system, and the valve plate of the gate valve separates the bidirectional water pump from the sulfur absorption tank, thereby reducing the impact of the energization of the anode plate and the cathode plate on the bidirectional water pump.

Optionally, filter screens are provided at both ends of the sulfur-passing pipe.

The adoption of the above technical solution is helpful to reduce the possibility of sulfur solids in the sulfur collecting tank flowing into the sulfur absorbing tank.

Optionally, the cooling pipe is spiral-shaped as a whole and a plurality of fins are arranged along the spiral direction of the cooling pipe.

By adopting the above technical solution, the contact range between the surface area of the cooling pipe and the refrigerant is increased, which is beneficial to improving the effect of rapid liquefaction of ammonia.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The worker starts the air pump through the control system, and the air pump draws the gas in the manure fermentation bin into the cooling pipe. Under the cooling effect of the refrigeration component, the cooling pipe and the temporary storage box are cooled to about minus 34°. At this time, the ammonia has been liquefied and the hydrogen sulfide is still in the gaseous state. The liquefied ammonia flows into the ammonia collection tank group through the drain pipe, and the hydrogen sulfide flows into the sulfur absorption tank through the exhaust pipe, so as to separate the ammonia and hydrogen sulfide. At the same time, ammonia and hydrogen sulfide are collected for reuse, which is conducive to improving the utilization rate of ammonia;

2. The worker starts the three-way valve through the control system to make the liquefied ammonia gas in the temporary storage tank flow to the nitrification ammonia tank or the carbonization ammonia tank. The liquefied ammonia gas in the nitrification ammonia tank reacts with the nitric acid solution to produce ammonium nitrate, and the liquefied ammonia gas in the carbonization ammonia tank reacts with the carbonic acid solution to produce ammonium carbonate. Both ammonium nitrate and ammonium carbonate are the main components of nitrogen fertilizer. In this way, the harmful gas in the feces fermentation tank is treated, and the products produced will increase the factory's income.

3. There will be a large amount of carbon dioxide gas in the manure fermentation bin, and at a temperature of about minus 34°, carbon dioxide will liquefy. The liquefied ammonia gas in the nitrification ammonia tank reacts with the nitric acid solution to generate heat, causing the liquefied carbon dioxide to precipitate into gas. The gaseous carbon dioxide flows into the transfer tank through the first conduit, and flows into the carbonization ammonia tank through the second conduit, increasing the carbon dioxide content in the carbonization ammonia tank, so that bicarbonate is mainly generated in the carbonization ammonia tank. Bicarbonate has higher heat resistance than carbonate, which is conducive to the subsequent transportation of ammonia salts. At the same time, the transfer tank reduces the possibility of direct contact between the solutions in the nitrification ammonia tank and the carbonization ammonia tank.

4. Workers use the control system to supply power to the cathode plate and the anode plate, so that the sulfur in the sodium sulfide adheres to the anode plate. At the same time, a large amount of hydrogen will be generated on the cathode plate, and the hydrogen will be discharged to the external collection box through the hydrogen exhaust pipe. At the same time, a large amount of sodium hydroxide will be generated in the sulfur collection tank. After the electrolysis is completed, the workers start the two-way water pump through the control system. The blades of the two-way water pump rotate forward and reverse, so that the sodium hydroxide solution in the sulfur collection tank flows into the sulfur absorption tank, and the sodium sulfide solution in the sulfur absorption tank flows into the sulfur collection tank, so as to achieve sodium balance.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an embodiment of the present application.

2 is a cross-sectional view of the positional relationship among the nitrifying ammonia tank, the gas separation chamber and the sulfur collecting tank in the embodiment of the present application.

Explanation of reference numerals: 1. feces fermentation chamber; 2. gas separation chamber; 3. gas collection mechanism; 31. ammonia collection tank group; 311. nitrification ammonia tank; 312. carbonization ammonia tank; 313. exhaust valve; 314. drain valve; 315. nitric acid solution; 316. carbonic acid solution; 32. sulfur absorption tank; 4. air pump; 5. separation mechanism; 51. cooling pipe; 52. temporary storage box; 53. refrigeration assembly; 531. refrigerant; 532. refrigerator; 54. exhaust pipe; 55. drain pipe; 6. three-way valve; 7. transfer tank; 8 , first conduit; 9, second conduit; 10, one-way valve; 11, carbon tetrachloride solvent; 12, sodium hydroxide solution; 13, liquid adding pipe; 14, pressure relief pipe; 15, sulfur collecting tank; 16, sulfur pipe; 17, two-way water pump; 18, partition; 19, cathode plate; 20, anode plate; 21, hydrogen exhaust pipe; 22, plate changing tank; 23, sealing plate; 24, rotating motor; 25, insulating rod; 26, conversion disk; 27, plug valve; 28, filter screen; 29, fin; 30, gas pipeline; 40, pH detector.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1-2.

The embodiment of the present application discloses a waste gas treatment device for a livestock and poultry manure fermentation bin.

1 , a waste gas treatment device for a livestock and poultry manure fermentation bin includes a manure fermentation bin 1, a gas separation bin 2 and a gas collection mechanism 3. A gas pipeline 30 is connected between the manure fermentation bin 1 and the gas separation bin 2. An air pump 4 electrically connected to the control system is bolted in the middle of the gas pipeline 30. A separation mechanism 5 for separating ammonia and hydrogen sulfide is arranged on the gas separation bin 2.

1 and 2 , the separation mechanism 5 includes a cooling pipe 51 and a temporary storage box 52 arranged in the gas separation chamber 2. The cooling pipe 51 is spiral in shape as a whole and has a plurality of fins 29 welded along the spiral direction of the cooling pipe 51. A refrigeration assembly 53 for cooling the cooling pipe 51 and the temporary storage box 52 is arranged on the gas separation chamber 2. The refrigeration assembly 53 includes a refrigerant 531 installed in the gas separation chamber 2. A refrigerator 532 electrically connected to the control system is arranged on the gas separation chamber 2.

1 and 2 , the refrigerator 532 is used to keep the refrigerant 531 at a low temperature. The cooling pipe 51 and the temporary storage box 52 are both immersed in the refrigerant 531. One end of the cooling pipe 51 is connected to the gas pipeline 30, and the other end is connected to the temporary storage box 52. The top and bottom of the temporary storage box 52 are respectively connected to an exhaust pipe 54 and a drain pipe 55. The gas collection mechanism 3 includes an ammonia collection tank group 31 connected to the drain pipe 55 and a sulfur absorption tank 32 connected to the drain pipe 55.

The worker starts the air pump 4 through the control system, and the air pump 4 draws the fermentation gas in the feces fermentation bin 1 into the cooling pipe 51. The refrigerator 532 keeps the temperature of the refrigerant 531 at about minus 34°, while the liquefaction temperature of ammonia is minus 33.4°, the liquefaction temperature of hydrogen sulfide is minus 60.4°, and the liquefaction temperature of carbon dioxide is minus 30°. The cooling pipe 51 and the temporary storage box 52 are both immersed in the refrigerant 531.

The refrigerant 531 cools the fermentation gas in the cooling tube 51 by heat transfer. At this time, the ammonia and carbon dioxide have been liquefied while the hydrogen sulfide is still in a gaseous state. The liquefied ammonia will be temporarily stored in the temporary storage box 52. The liquefied ammonia in the temporary storage box 52 will flow to the ammonia collection tank group 31 through the drain pipe 55, and the hydrogen sulfide will flow to the sulfur absorption tank 32 through the exhaust pipe 54, thereby separating the ammonia and hydrogen sulfide.

1 and 2 , the exhaust pipe 54 is connected to a one-way valve 10, the drain pipe 55 is connected to a three-way valve 6 electrically connected to the control system, the ammonia tank group 31 includes a nitrification ammonia tank 311 and a carbonization ammonia tank 312, both the nitrification ammonia tank 311 and the carbonization ammonia tank 312 are provided with a pH detector 40 electrically connected to the control system, and the nitrification ammonia tank 311 and the carbonization ammonia tank 312 are connected to an exhaust valve 313 and a drain valve 314 electrically connected to the control system.

1 and 2 , the nitrification ammonia tank 311 and the carbonization ammonia tank 312 are respectively connected to the two outlet ends of the three-way valve 6, the nitrification ammonia tank 311 is filled with a nitric acid solution 315, the carbonization ammonia tank 312 is filled with a carbonic acid solution 316, a transfer tank 7 is arranged between the nitrification ammonia tank 311 and the carbonization ammonia tank 312, a first conduit 8 is connected between the bottom of the transfer tank 7 and the top of the nitrification ammonia tank 311, and a second conduit 9 is connected between the top of the transfer tank 7 and the bottom of the carbonization ammonia tank 312.

After the liquefied ammonia and carbon dioxide are stored in the temporary storage box 52 for a period of time, the worker starts the three-way valve 6 through the control system. The worker relies on the data fed back by the pH detector 40 in the nitrification ammonia tank 311 and the carbonization ammonia tank 312 to make the liquefied ammonia and carbon dioxide in the temporary storage box 52 flow to the nitrification ammonia tank 311 or the carbonization ammonia tank 312. At this time, the one-way valve 10 blocks the exhaust pipe 54.

When the liquefied ammonia and carbon dioxide flow to the carbonization ammonia tank 312, the liquefied ammonia reacts with the carbonic acid solution 316 to generate ammonium carbonate. The workers can understand the main components of the ammonium carbonate in the carbonization ammonia tank 312 through the information fed back to the control system by the pH detector 40. When the liquefied ammonia and carbon dioxide flow to the nitration ammonia tank 311, the liquefied ammonia reacts with the nitric acid solution 315 to generate ammonium nitrate. This reaction generates a large amount of heat.

The heat will be absorbed by the liquefied carbon dioxide, thereby cooling the nitrifying ammonia tank 311, and the carbon dioxide absorbs heat and diffuses rapidly. At this time, the worker chooses whether to open the exhaust valve 313 on the nitrifying ammonia tank 311 according to the pH value in the carbonized ammonia tank 312. At the same time, the worker can understand the inventory of nitric acid solution 315 in the nitrifying ammonia tank 311 through the information fed back to the control system by the pH detector 40, and choose whether to add nitric acid solution 315.

When the worker chooses not to open the exhaust valve 313 on the nitrifying ammonia tank 311, the carbon dioxide in the nitrifying ammonia tank 311 will flow to the transfer tank 7 through the first conduit 8, and then flow from the transfer tank 7 to the carbonizing ammonia tank 312 through the second conduit 9, supplying carbon dioxide to the ammonium carbonate solution in the carbonizing ammonia tank 312, thereby converting the ammonium carbonate in the carbonizing ammonia tank 312 into ammonium bicarbonate. Since ammonium bicarbonate is more susceptible to temperature than ammonium carbonate, it is convenient for subsequent transportation and utilization of ammonium bicarbonate.

1 and 2, the sulfur absorption tank 32 is filled with carbon tetrachloride solvent 11 and sodium hydroxide solution 12, the outlet end of the exhaust pipe 54 extends to the carbon tetrachloride solvent 11 layer in the sulfur absorption tank 32, the sulfur absorption tank 32 is connected with a liquid adding pipe 13 and a pressure relief pipe 14, a sulfur collecting tank 15 is arranged next to the sulfur absorption tank 32, a sulfur passing pipe 16 is connected between the sulfur collecting tank 15 and the sulfur absorption tank 32, and a pH detector 40 electrically connected to the control system is arranged in the sulfur collecting tank 15 and the sulfur absorption tank 32.

1 and 2 , the sulfur-passing pipe 16 is used to circulate the solution in the sulfur absorption tank 32 to the sulfur collecting tank 15 . The sulfur-passing pipe 16 is made of insulating material. Filter screens 28 are arranged at both ends of the sulfur-passing pipe 16 . A gate valve 27 electrically connected to the control system is arranged on the sulfur-passing pipe 16 and between the two-way water pump 17 and the sulfur absorption tank 32 . The valve plate of the gate valve 27 and the blades of the two-way water pump 17 are made of insulating and corrosion-resistant materials.

1 and 2, a bidirectional water pump 17 electrically connected to the control system is arranged on the sulfur-passing pipe 16, a partition 18 is arranged in the sulfur collecting tank 15, and the partition 18 divides the space above the liquid in the sulfur collecting tank 15 into two independent cavities, a cathode plate 19 and an anode plate 20 electrically connected to the control system are arranged in the sulfur collecting tank 15, and the partition 18 is located between the cathode plate 19 and the anode plate 20, and a hydrogen discharge pipe 21 is connected to the sulfur absorption tank 32 in the cavity where the cathode plate 19 is located, and the hydrogen discharge pipe 21 is used to be connected to an external collection box.

1 and 2 , a plate changing slot 22 is provided on the sulfur absorption tank 32 in the cavity where the anode plate 20 is located, a sealing plate 23 is bolted to the plate changing slot 22 of the sulfur absorption tank 32, a rotating motor 24 electrically connected to the control system is bolted to the sulfur absorption tank 32, an insulating rod 25 is coaxially arranged on the output shaft of the rotating motor 24, the insulating rod 25 rotates and extends into the sulfur absorption tank 32 and is welded with a conversion disk 26, and the anode plate 20 is bolted to the conversion disk 26.

When the worker closes the three-way valve 6 through the control system, the hydrogen sulfide gas flows into the sulfur absorption tank 32 through the exhaust pipe 54 and the one-way valve 10. Since the density of the carbon tetrachloride solvent 11 is greater than the density of the sodium hydroxide solution 12, and the carbon tetrachloride solvent 11 and the sodium hydroxide solution 12 are immiscible, the hydrogen sulfide gas diffuses from the carbon tetrachloride solvent 11 into the sodium hydroxide solution 12.

In this process, the hydrogen sulfide gas is fully reacted with the sodium hydroxide solution 12 to obtain sodium sulfide. The heat generated by the reaction causes the temperature of the sodium hydroxide solution 12 to rise, reducing the effect of the cold air flow of hydrogen sulfide on the cooling of the sodium hydroxide solution 12 and slowing down the reaction. At the same time, the workers understand the stock of the sodium hydroxide solution 12 in the sulfur absorption tank 32 through the information fed back by the pH detector 40 in the sulfur absorption tank 32.

At the same time, the workers energize the cathode plate 19 and the anode plate 20 through the control system. Under the action of electrolysis, the sodium sulfide in the sulfur absorption tank 32 causes the sulfur to adhere to the anode plate 20 in a solid state, and a large amount of hydrogen will be generated on the cathode plate 19. The hydrogen is discharged to an external collection box through the hydrogen discharge pipe 21. At the same time, a large amount of sodium hydroxide will be generated in the sulfur collection tank 15.

When the content of sodium hydroxide solution 12 in the sulfur absorption tank 32 is insufficient, the worker opens the gate valve 27 through the control system and starts the two-way water pump 17. The blades of the two-way water pump 17 rotate forward and reversely, so that the sodium hydroxide solution 12 in the sulfur collection tank 15 flows into the sulfur absorption tank 32, and the sodium sulfide solution in the sulfur absorption tank 32 flows into the sulfur collection tank 15, thereby achieving sodium balance.

As too much sulfur adheres to the anode plate 20, the anode plate 20 will be passivated, and the electrolysis effect of the sodium sulfide solution will deteriorate. The worker starts the rotating motor 24 through the control system, and the rotating motor 24 drives the conversion disk 26 to rotate. Then the worker opens the sealing plate 23 after a power outage and replaces the anode plate 20, while collecting the sulfur.

The implementation principle of the waste gas treatment device for livestock and poultry manure fermentation bin in the embodiment of the present application is as follows: a worker starts the air pump 4 through the control system, and the air pump 4 draws the fermentation gas in the manure fermentation bin 1 into the cooling pipe 51. The refrigerator 532 keeps the temperature of the refrigerant 531 at about minus 34°, while the liquefaction temperature of ammonia is minus 33.4°, the liquefaction temperature of hydrogen sulfide is minus 60.4°, and the liquefaction temperature of carbon dioxide is minus 30°. Since the cooling pipe 51 and the temporary storage box 52 are both immersed in the refrigerant 531.

The refrigerant 531 cools the fermentation gas in the cooling tube 51 by heat transfer. At this time, the ammonia and carbon dioxide have been liquefied while the hydrogen sulfide is still in a gaseous state. The liquefied ammonia will be temporarily stored in the temporary storage box 52. The liquefied ammonia in the temporary storage box 52 will flow to the ammonia collection tank group 31 through the drain pipe 55, and the hydrogen sulfide will flow to the sulfur absorption tank 32 through the exhaust pipe 54, thereby separating the ammonia and hydrogen sulfide.

After the liquefied ammonia and carbon dioxide are stored in the temporary storage box 52 for a period of time, the worker starts the three-way valve 6 through the control system. The worker relies on the data fed back by the pH detector 40 in the nitrification ammonia tank 311 and the carbonization ammonia tank 312 to make the liquefied ammonia and carbon dioxide in the temporary storage box 52 flow to the nitrification ammonia tank 311 or the carbonization ammonia tank 312. At this time, the one-way valve 10 blocks the exhaust pipe 54.

When the liquefied ammonia and carbon dioxide flow to the carbonization ammonia tank 312, the liquefied ammonia reacts with the carbonic acid solution 316 to generate ammonium carbonate. The workers can understand the main components of the ammonium carbonate in the carbonization ammonia tank 312 through the information fed back to the control system by the pH detector 40. When the liquefied ammonia and carbon dioxide flow to the nitration ammonia tank 311, the liquefied ammonia reacts with the nitric acid solution 315 to generate ammonium nitrate. This reaction generates a large amount of heat.

The heat will be absorbed by the liquefied carbon dioxide, thereby cooling the nitrifying ammonia tank 311, and the carbon dioxide absorbs heat and diffuses rapidly. At this time, the worker chooses whether to open the exhaust valve 313 on the nitrifying ammonia tank 311 according to the pH value in the carbonized ammonia tank 312. At the same time, the worker can understand the inventory of nitric acid solution 315 in the nitrifying ammonia tank 311 through the information fed back to the control system by the pH detector 40, and choose whether to add nitric acid solution 315.

When the worker chooses not to open the exhaust valve 313 on the nitrifying ammonia tank 311, the carbon dioxide in the nitrifying ammonia tank 311 will flow to the transfer tank 7 through the first conduit 8, and then flow from the transfer tank 7 to the carbonizing ammonia tank 312 through the second conduit 9, supplying carbon dioxide to the ammonium carbonate solution in the carbonizing ammonia tank 312, thereby converting the ammonium carbonate in the carbonizing ammonia tank 312 into ammonium bicarbonate. Since ammonium bicarbonate is more susceptible to temperature than ammonium carbonate, it is convenient for subsequent transportation and utilization of ammonium bicarbonate.

When the worker closes the three-way valve 6 through the control system, the hydrogen sulfide gas flows into the sulfur absorption tank 32 through the exhaust pipe 54 and the one-way valve 10. Since the density of the carbon tetrachloride solvent 11 is greater than the density of the sodium hydroxide solution 12, and the carbon tetrachloride solvent 11 and the sodium hydroxide solution 12 are immiscible, the hydrogen sulfide gas diffuses from the carbon tetrachloride solvent 11 into the sodium hydroxide solution 12.

In this process, the hydrogen sulfide gas is fully reacted with the sodium hydroxide solution 12 to obtain sodium sulfide. The heat generated by the reaction causes the temperature of the sodium hydroxide solution 12 to rise, reducing the effect of the cold air flow of hydrogen sulfide on the cooling of the sodium hydroxide solution 12 and slowing down the reaction. At the same time, the workers understand the stock of the sodium hydroxide solution 12 in the sulfur absorption tank 32 through the information fed back by the pH detector 40 in the sulfur absorption tank 32.

At the same time, the workers energize the cathode plate 19 and the anode plate 20 through the control system. Under the action of electrolysis, the sodium sulfide in the sulfur absorption tank 32 causes the sulfur to adhere to the anode plate 20 in a solid state, and a large amount of hydrogen will be generated on the cathode plate 19. The hydrogen is discharged to an external collection box through the hydrogen discharge pipe 21. At the same time, a large amount of sodium hydroxide will be generated in the sulfur collection tank 15.

When the content of sodium hydroxide solution 12 in the sulfur absorption tank 32 is insufficient, the worker opens the gate valve 27 through the control system and starts the two-way water pump 17. The blades of the two-way water pump 17 rotate forward and reversely, so that the sodium hydroxide solution 12 in the sulfur collection tank 15 flows into the sulfur absorption tank 32, and the sodium sulfide solution in the sulfur absorption tank 32 flows into the sulfur collection tank 15, thereby achieving sodium balance.

As too much sulfur adheres to the anode plate 20, the anode plate 20 will be passivated, and the electrolysis effect of the sodium sulfide solution will deteriorate. The worker starts the rotating motor 24 through the control system, and the rotating motor 24 drives the conversion disk 26 to rotate. Then the worker opens the sealing plate 23 after a power outage and replaces the anode plate 20, while collecting the sulfur.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A exhaust treatment device for beasts and birds excrement and urine fermentation storehouse, its characterized in that: including excrement and urine fermentation storehouse (1), gas separation storehouse (2) and gas collection mechanism (3), communicate between excrement and urine fermentation storehouse (1) and gas separation storehouse (2) air pump (4), air pump (4) electricity are connected in control system, be provided with on gas separation storehouse (2) and be used for separating ammonia and hydrogen sulfide separating mechanism (5), separating mechanism (5) are including setting up cooling tube (51) and temporary storage case (52) in gas separation storehouse (2), be provided with on gas separation storehouse (2) and carry out cooling refrigeration subassembly (53) to cooling tube (51) and temporary storage case (52), cooling tube (51) one end communicates in air pump (4), and the other end communicates in temporary storage case (52), the top and the bottom of temporary storage case (52) communicate respectively have blast pipe (54) and fluid-discharge tube (55), gas collection mechanism (3) include with fluid-discharge tube (55) the collection ammonia jar group (31) and with fluid-discharge tube (55) intercommunication inhale sulphur jar (32).

2. An exhaust gas treatment device for a livestock manure fermentation tank according to claim 1, characterized in that: the refrigeration assembly (53) comprises a refrigerant (531) arranged in the gas separation bin (2), a refrigerator (532) electrically connected to the control system is arranged on the gas separation bin (2), and the cooling pipe (51) and the temporary storage box (52) are immersed in the refrigerant (531).

3. An exhaust gas treatment device for a livestock manure fermentation tank according to claim 1, characterized in that: the liquid discharge pipe (55) is communicated with a three-way valve (6) electrically connected with a control system, the ammonia collection tank group (31) comprises a nitrifying ammonia tank (311) and a carbonizing ammonia tank (312), exhaust valves (313) and liquid discharge valves (314) electrically connected with the control system are respectively communicated with the nitrifying ammonia tank (311) and the carbonizing ammonia tank (312), the nitrifying ammonia tank (311) and the carbonizing ammonia tank (312) are respectively communicated with two outlet ends of the three-way valve (6), nitric acid solution (315) is filled in the nitrifying ammonia tank (311), and carbonic acid solution (316) is filled in the carbonizing ammonia tank (312).

4. A waste gas treatment device for a livestock manure fermentation tank according to claim 3, characterized in that: the ammonia nitrifying device is characterized in that a transfer tank (7) is arranged between the ammonia nitrifying tank (311) and the ammonia carbide tank (312), a first guide pipe (8) is communicated between the bottom of the transfer tank (7) and the top of the ammonia nitrifying tank (311), and a second guide pipe (9) is communicated between the top of the transfer tank (7) and the bottom of the ammonia carbide tank (312).

5. An exhaust gas treatment device for a livestock manure fermentation tank according to claim 1, characterized in that: be provided with check valve (10) on blast pipe (54), install carbon tetrachloride solvent (11) and sodium hydroxide solution (12) in sulfur absorbing tank (32), the end of giving vent to anger of blast pipe (54) extends into carbon tetrachloride solvent (11) in sulfur absorbing tank (32) in situ, it has liquid feeding pipe (13) and pressure release pipe (14) to communicate on sulfur absorbing tank (32).

6. The waste gas treatment device for livestock manure fermentation bins according to claim 5, wherein: the sulfur absorbing device is characterized in that a sulfur collecting tank (15) is arranged beside the sulfur absorbing tank (32), a sulfur passing pipe (16) is communicated between the sulfur collecting tank (15) and the sulfur absorbing tank (32), the sulfur passing pipe (16) is used for enabling a solution in the sulfur absorbing tank (32) to flow into the sulfur collecting tank (15), a bidirectional water pump (17) electrically connected to a control system is arranged on the sulfur passing pipe (16), a partition plate (18) is arranged in the sulfur collecting tank (15), the partition plate (18) divides the upper part of liquid in the sulfur collecting tank (15) into two cavities, a cathode plate (19) and an anode plate (20) electrically connected to the control system are arranged in the sulfur collecting tank (15), the partition plate (18) is located between the cathode plate (19) and the anode plate (20), and a hydrogen discharging pipe (21) is communicated with the sulfur absorbing tank (32) of the cavity where the cathode plate (19) is located.

7. The waste gas treatment device for livestock manure fermentation bins according to claim 6, wherein: the utility model discloses a sulfur absorbing device, including positive plate (20), sulfur absorbing tank (32), change board groove (22) have been seted up on sulfur absorbing tank (32) of positive plate (20), can dismantle on changing board groove (22) of sulfur absorbing tank (32) and be provided with shrouding (23), be provided with on sulfur absorbing tank (32) and be connected in control system's rotating motor (24), coaxial insulator spindle (25) that are provided with on the output shaft of rotating motor (24), insulator spindle (25) rotate and extend to in sulfur absorbing tank (32) and be provided with conversion dish (26), positive plate (20) can dismantle and set up on conversion dish (26).

8. The waste gas treatment device for livestock manure fermentation bins according to claim 6, wherein: the sulfur tube (16) is made of an insulating material, a gate valve (27) electrically connected to a control system is arranged on the sulfur tube (16) and between the bidirectional water pump (17) and the sulfur suction tank (32), and a valve plate of the gate valve (27) is made of an insulating material.

9. The waste gas treatment device for livestock manure fermentation bins according to claim 6, wherein: both ends of the sulfur tube (16) are provided with filter screens (28).

10. An exhaust gas treatment device for a livestock manure fermentation tank according to claim 2, characterized in that: the cooling tube (51) is spirally formed as a whole and a plurality of fins (29) are provided along the spiral direction of the cooling tube (51).