A system and method for collecting and treating odors from pigsties in pig farms

Abstract

This invention discloses a system and method for collecting and treating odors in pig farms. The system includes a pig house, a negative pressure fan, a spray tower, and a pulsed plasma deodorization device. The pig house includes a feeding layer and a collection tank located below the feeding layer. A grid is installed between the feeding layer and the collection tank. An air intake pipe is installed in the upper part of the collection tank, with air intake holes. The air intake pipe is connected to the air inlet of the negative pressure fan. The air outlet of the negative pressure fan is connected to the spray inlet of the spray tower. The spray outlet of the spray tower is connected to the deodorization inlet of the pulsed plasma deodorization device. The deodorization outlet of the pulsed plasma deodorization device is connected to the external environment. This invention manages odors at their source in the pig house, collecting the odors generated by fermentation in the collection tank under negative pressure and directing them to the subsequent spray tower and pulsed plasma deodorization device. Its application in actual pig houses is highly feasible, breaking through the technical barriers that prevent the pig farming industry from effectively treating odors.

Description

Technical Field

[0001] This invention relates to the field of animal husbandry technology, specifically to a system and method for collecting and treating odors from pigsties in pig farms. Background Technology

[0002] The most direct source of odor in pig farms is in enclosed and semi-enclosed pig houses. Due to the high humidity inside the houses, pig manure and bedding will produce foul-smelling gases under the fermentation and decomposition of bacteria. This is especially serious in low-pressure and high-temperature weather, and the downwind direction of the farm boundary will directly have a negative impact on the breathing of the pigs in the houses and the lives of the surrounding residents.

[0003] Currently, traditional pig farms have an upper feeding area where pigs are raised, with a slatted floor underneath. Pig excrement falls directly into the manure collection ditch. The pen is divided into several sections by fencing, with the bottom section containing pig manure, urine, and flushing fluid. The manure in the ditch may accumulate and ferment, or it may be cleaned every few days or a week. This constant microbial activity leads to the release of large amounts of ammonia, hydrogen sulfide, and other foul-smelling substances into the feeding area. Ammonia is highly irritating, especially to mucous membranes, often causing conjunctival and upper respiratory tract mucosal congestion and edema, leading to illness. Mild cases negatively impact growth and development, while severe cases can cause death. Long-term chronic exposure to hydrogen sulfide can weaken the pig's constitution and significantly reduce its production performance.

[0004] Therefore, the primary element of pigsty environmental control is ventilation, which is necessary in any season. The purpose of ventilation in pigsties is twofold: first, to increase airflow when temperatures are high, making the pigs more comfortable and mitigating the adverse effects of high temperatures; and second, in the case of a closed pigsty, ventilation removes stale air and introduces fresh air from outside, thus improving air quality. Currently, pigsties typically install high-volume exhaust fans in the feeding area, employing either longitudinal or transverse ventilation. Both methods require large airflows to reduce odor concentration, allowing the odor to be diluted and released into the atmosphere to protect the pigs' growth and development. While the odor is diluted, the airflow is enormous. Treating the odor with traditional deodorization equipment would be extremely costly, making it impractical for pigsty odor control. Without treatment, the accumulation of odorous substances will continue to pollute the surrounding area, causing significant inconvenience to nearby residents. Summary of the Invention

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] A pig farm odor collection and treatment system includes a pig house, a negative pressure fan, a spray tower, and a pulsed plasma deodorization device. The pig house includes a feeding layer and a collection trough located below the feeding layer. A grid is installed between the feeding layer and the collection trough. An air suction pipe is installed in the upper part of the collection trough, and air suction holes are opened on the air suction pipe. The air suction pipe is connected to the air inlet of the negative pressure fan. The air outlet of the negative pressure fan is connected to the spray inlet of the spray tower. The spray outlet of the spray tower is connected to the deodorization inlet of the pulsed plasma deodorization device. The deodorization outlet of the pulsed plasma deodorization device is connected to the external environment.

[0007] The present invention further comprises the pulsed plasma deodorization device including a chassis, a pulsed power supply and a pulsed plasma reaction component. The chassis includes an air inlet channel, a pulsed plasma reaction zone and an air outlet channel in sequence along the direction from the deodorization inlet to the deodorization outlet. The pulsed plasma reaction component is disposed in the pulsed plasma reaction zone and the pulsed power supply is electrically connected to the pulsed plasma reaction component.

[0008] The present invention is further configured such that the pulsed plasma reaction assembly includes a grounding bracket, on which an array of discharge tubes are arranged, the discharge tubes being hollow, and electrode supports being provided at both ends of the discharge tubes. A high-voltage porcelain insulator is connected between the electrode supports and the grounding bracket, and a discharge electrode line is connected between the electrode supports and the electrode supports. The discharge electrode line is located inside the discharge tube, and the output end of the pulse power supply is connected to the discharge electrode line.

[0009] The present invention is further configured such that the discharge electrode includes an electrode body, a discharge sheet sleeved on the electrode body, a first retainer disposed between the discharge sheets, and a second retainer disposed at both ends of the electrode body. The discharge sheet has uniformly protruding discharge portions on its outer periphery. The upper and lower end faces of the first retainer and the end face of the second retainer near the discharge sheet are provided with positioning grooves and positioning blocks. The positioning grooves and positioning blocks on the upper end face of the first retainer are offset from the positioning grooves and positioning blocks on the lower end face of the same first retainer. The discharge portions are confined between the positioning grooves and positioning blocks adjacent to the discharge portions, and the discharge portions protrude from the surfaces of the first retainer and the second retainer. The discharge portions of adjacent discharge sheets are offset along the axial direction of the electrode body. The two ends of the electrode body are respectively connected to the electrode support.

[0010] The present invention is further configured such that an airflow distribution plate is provided in the air inlet channel, the airflow distribution plate spans the cross-section of the air inlet channel, a first side plate is provided on the side of the chassis, the first side plate is arranged opposite to the airflow distribution plate, and a drain pipe is provided at the bottom of the air inlet channel.

[0011] The present invention is further configured such that an auxiliary absorption component is provided in the air outlet channel, the auxiliary absorption component is provided with adsorption material, and a second side plate is provided on the side of the chassis, the second side plate being directly opposite the auxiliary absorption component.

[0012] The present invention is further configured such that the spray tower includes a tower body, a water tank is provided in the lower part of the tower body, and support plates are arranged sequentially from bottom to top in the tower body. An absorbent packing layer is provided on the lower support plate, and an demister packing layer is provided on the upper support plate. A nozzle is provided above the support plate, and the nozzle is connected to the water tank through a spray pipe.

[0013] The present invention is further configured such that an observation window is provided on the tower body, and the observation window is located near the support plate and the nozzle.

[0014] The present invention is further provided with an exhaust fan installed on the wall of the pigsty, the exhaust fan being used for the exchange of outside air with the air in the feeding layer.

[0015] A method for collecting and treating odors from pigsties in a pig farm, applied to the aforementioned odor collection and treatment system for pigsties in a pig farm, comprising:

[0016] When the negative pressure fan is powered on, it keeps the collection tank under negative pressure. The negative pressure fan draws the waste gas generated in the collection tank to the spray inlet of the spray tower.

[0017] Inside the spray tower, the exhaust gas passes from bottom to top through the absorption packing layer and the demister packing layer, while the nozzles spray the absorption liquid from top to bottom. The dust particles in the exhaust gas are captured by the absorption liquid, and the water-soluble gases in the exhaust gas dissolve in the absorption liquid and react to produce salt compounds and water.

[0018] Insoluble or incompletely dissolved gases in the exhaust gas enter the pulsed plasma deodorization equipment. After passing through the airflow distribution plate, the exhaust gas enters the pulsed plasma reaction zone evenly. The pulsed power supply outputs high voltage to the discharge electrode line, forming a corona zone between the discharge electrode line and the discharge tube. Some of the exhaust gas is excited and ionized when passing through the corona zone, while some of the exhaust gas is excited by colliding with the high-energy active particles in the corona zone. Some of the excited particles are reducing, while others are oxidizing. The reducing particles preferentially combine with the oxidizing particles to carry out an oxidation-reduction reaction, generating odorless gas. The particles that have not undergone an oxidation-reduction reaction are adsorbed by the adsorption material and continue to react.

[0019] The purified exhaust gas is discharged into the external environment from the deodorization outlet of the pulse plasma deodorization equipment.

[0020] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0021] This technical solution, a pig farm odor collection and treatment system, addresses the pain points of existing pig farm odor control methods. It modifies the pig farm without affecting its basic layout. By installing suction pipes with numerous suction holes within the collection trough to cover the area as much as possible, a negative pressure fan maintains a slight negative pressure within the collection trough, thus preventing the malodorous gases produced by fermentation from escaping to the feeding area. Based on the composition and characteristics of the malodorous waste gas produced by fermentation, it is first treated by spraying from a spray tower to remove dust particles and easily flammable materials. Gases soluble in water are removed; remaining gases that are sparingly soluble in water or not completely dissolved enter the pulsed plasma deodorization equipment. Under the high voltage applied by the pulsed power supply, the pulsed plasma reaction component bombards the odor molecules, oxygen, and water vapor entering the pulsed plasma reaction zone with high-energy ions, causing the molecules to be ionized. After the molecules are ionized, the reducing particles preferentially combine with the oxidizing particles to carry out oxidation-reduction reactions to generate harmless substances, thereby achieving the purpose of deodorization. The ionized particles that do not react in the pulsed plasma reaction zone are adsorbed by the adsorption material and continue to react. Finally, the purified gas is discharged.

[0022] This invention addresses the issue of odor collection and treatment in pigsties by managing the source of odor. It uses negative pressure to collect the odor generated during fermentation in a collection tank and transfer it to subsequent treatment equipment. This significantly reduces the odor content in the exhaust gas during daily ventilation, preventing any impact on the surrounding environment or residents. Furthermore, this technical solution only requires the addition of a suction pipe within the collection tank; the spray tower and pulse plasma deodorization equipment are external and independently used. Therefore, this invention is highly feasible for practical application in pigsties, breaking down the technical barriers preventing effective odor treatment in the pig farming industry.

[0023] The present invention provides a method for collecting and treating odors in pigsties. This method first removes dust and dissolves the odors to remove most of the dust particles and water-soluble odors. This step can remove a significant portion of the odors, reducing the air volume that the subsequent pulse plasma deodorization equipment needs to handle. Moreover, the removal of dust particles effectively ensures the stability of the pulse plasma deodorization equipment. The pulse plasma deodorization equipment uses electrodes to ionize gas molecules under high voltage, and uses the oxidation-reduction reaction of ionized particles to convert odors into harmless substances. The reaction is highly efficient and clean. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a pig farm odor collection and treatment system according to an embodiment of the present invention.

[0025] Figure 2 This is a front view of the pulsed plasma deodorization device according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the internal structure of the pulsed plasma deodorization device according to an embodiment of the present invention.

[0027] Figure 4 This is a perspective view of the pulsed plasma reaction assembly according to an embodiment of the present invention.

[0028] Figure 5 This is a three-dimensional view of the discharge electrode wires according to an embodiment of the present invention.

[0029] Figure 6 This is a partial exploded view of the discharge electrode wire in an embodiment of the present invention.

[0030] Figure 7 This is a front view of the spray tower according to an embodiment of the present invention.

[0031] Figure 8 This is a schematic diagram of the internal structure of the spray tower according to an embodiment of the present invention. Detailed Implementation

[0032] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection, or a connection within two components; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] Example 1

[0036] Combined with appendix Figure 1 To be continued Figure 8 The present invention provides a system for collecting and treating odors in pigsties of a pig farm, comprising a pigsty 1, a negative pressure fan 2, a spray tower 3, and a pulsed plasma deodorization device 4. The pigsty 1 includes a feeding layer 11 and a collection trough 12 located below the feeding layer 11. A grid mesh 13 is provided between the feeding layer 11 and the collection trough 12. An air suction pipe 14 is arranged in the upper part of the collection trough 12, and an air suction hole 141 is opened on the air suction pipe 14. The air suction pipe 14 is connected to the air inlet of the negative pressure fan 2. The air outlet of the negative pressure fan 2 is connected to the spray inlet of the spray tower 3. The spray outlet of the spray tower 3 is connected to the deodorization inlet of the pulsed plasma deodorization device 4. The deodorization outlet of the pulsed plasma deodorization device 4 is connected to the external environment.

[0037] In the above embodiment, the feeding layer 11 is the pig pen activity area, and the collection trough 12 is a manure collection ditch. The feeding layer 11 and the collection trough 12 are separated by the grid mesh 13, so that the pig manure and urine produced by the pigs can fall into the collection trough 12. The collection trough 12 is filled with pig manure, pig urine and their flushing liquid. The generation of malodorous exhaust gas in the pig house 1 mainly comes from the fermentation of excrement. Its composition is very complex. According to data, there are more than 230 kinds of malodorous components in pig manure. These malodorous components can be classified according to their composition as: ① nitrogen-containing compounds, such as ammonia, amides, amines, indoles, etc.; ② sulfur-containing compounds, such as hydrogen sulfide, thioethers, thiols, etc.; ③ oxygen-containing compounds, such as fatty acids; ④ hydrocarbons, such as alkanes, alkenes, alkynes, aromatic hydrocarbons, etc.; ⑤ halogens and their derivatives, such as chlorine, halogenated hydrocarbons, etc.

[0038] In this embodiment, in order to effectively collect most of the odorous gases in the pigsty 1 and manage them from the source of the odor, the suction pipe 14 is used to collect the odorous gases produced by fermentation in the collection tank 12 in the form of negative pressure and send them to the subsequent treatment equipment. The odor content in the gas discharged during the daily ventilation of the pigsty is significantly reduced, and it will not affect the surrounding environment and residents. Moreover, the modification of the pigsty in this technical solution is only to add the suction pipe 14 in the collection tank. The other spray tower 3 and pulse plasma deodorization equipment 4 are external and used independently. Therefore, the application of this invention in actual pigsties is highly feasible, breaking through the technical barrier that the pig farming industry cannot effectively treat odors.

[0039] In this embodiment, the suction pipe 14 is arranged according to the area of ​​the collection tank 12, and the suction holes 141 on the suction pipe 14 are evenly distributed to cover every area of ​​the collection tank 12 as much as possible. Preferably, the openings of the suction holes 141 are set downwards. After the negative pressure fan 2 is started, a slightly negative pressure is formed in the collection tank. The negative pressure fan 2 can be a fan unit.

[0040] In this embodiment, the pulsed plasma deodorization device 4 includes a chassis 41, a pulsed power supply 42, and a pulsed plasma reaction assembly 43. The chassis 41 includes an air inlet channel 411, a pulsed plasma reaction zone 412, and an air outlet channel 413 in sequence along the direction from the deodorization inlet to the deodorization outlet. The pulsed plasma reaction assembly 43 is disposed in the pulsed plasma reaction zone 412, and the pulsed power supply 42 is electrically connected to the pulsed plasma reaction assembly 43.

[0041] In the above embodiments, it has been determined that the composition of the malodorous exhaust gas in the pigsty 1 is very complex. Passing the exhaust gas collected at the source through the spray tower 3 can only remove some of the water-soluble odors and dust particles; many other types of odors cannot be removed. Treating each type of gas according to its specific characteristics would lead to complex and cumbersome subsequent gas treatment processes. However, the pulse plasma deodorization device 4 in this invention utilizes electrodes to ionize gas molecules under high voltage, using the oxidation-reduction reaction of ionic particles to convert odors into harmless substances. This reaction is highly efficient and clean, effectively simplifying the treatment process.

[0042] In this embodiment, the pulsed plasma reaction assembly 43 includes a grounding bracket 431, on which an array of discharge tubes 432 are arranged. The discharge tubes 432 are hollow, and electrode supports 433 are provided at both ends of the discharge tubes 432. A high-voltage porcelain insulator 434 is connected between the electrode supports 433 and the grounding bracket 431. A discharge electrode line 435 is connected between the electrode supports 433 and the electrode supports 433. The discharge electrode line 435 is located inside the discharge tubes 432, and the output end of the pulse power supply 42 is connected to the discharge electrode line 435.

[0043] In this embodiment, the pulse power supply 42 applies a high voltage to the discharge electrode line 435, forming a corona region between the discharge electrode line 435 and the discharge tube 432. The gas entering the pulse plasma reaction zone 412 is ionized in the corona region, and the ionized particles undergo an oxidation-reduction reaction to produce harmless substances such as carbon dioxide and water.

[0044] In this embodiment, the discharge electrode wire 435 includes an electrode body 4351, a discharge plate 4352 sleeved on the electrode body 4351, a first retainer 4353 disposed between the discharge plates 4352, and a second retainer 4354 disposed at both ends of the electrode body 4351. The discharge plate 4352 has uniformly distributed protruding discharge portions 43521 on its outer periphery. The first retainer 4353 has a first positioning groove 43531 and a second positioning block 43532 around its upper and lower end faces. The second retainer 4354 has a second positioning groove 43541 and a second positioning block 43542 around its end face near the discharge plate 4352. The first retainer 4353... The first positioning groove 43531 and the first positioning block 43532 on the upper end face of the first 353 are offset from the first positioning groove 43531 and the first positioning block 43532 on the lower end face of the same first cartridge 4353. The discharge part 43521 is located between the adjacent positioning groove and the positioning block of the discharge part 43521, and the discharge part 43521 protrudes from the surface of the first cartridge 4353 and the surface of the second cartridge 4354. The discharge parts 43521 of the adjacent discharge pieces 4352 are offset along the axial direction of the electrode body. The two ends of the electrode body 4351 are respectively connected to the electrode bracket 433.

[0045] In this embodiment, the discharge electrode wire 435 is completely positioned by the first retainer 4353 and the second retainer 4354. The electrode wire is generally spindle-shaped, with only the discharge part 43521 protruding from the surface. The assembly, maintenance and replacement of the discharge electrode wire 435 are extremely convenient, effectively reducing costs. The discharge piece 4352 is not easily deformed. The retainers are arranged on the surface of the electrode body 4351 to form its frame structure, improving the overall rigidity and bending resistance of the discharge electrode wire 435. Moreover, the airflow has low resistance and smooth delivery when passing through the discharge electrode wire. The area through which the airflow flows is almost entirely the pulse plasma area, thereby improving the efficiency and effect of odor treatment.

[0046] In this embodiment, an airflow distribution plate 44 is provided inside the air inlet channel 411. The airflow distribution plate 44 spans the cross-section of the air inlet channel 411. A first side plate 414 is provided on the side of the chassis 41. The first side plate 414 is directly opposite to the airflow distribution plate 44. A drain pipe 415 is provided at the bottom of the air inlet channel 411.

[0047] In the above embodiment, the airflow distribution plate 44 has uniformly distributed perforations to prevent the gas entering the pulse plasma deodorization device 4 from being deflected, resulting in uneven gas entering the corona zone and reducing the odor treatment effect; the first side plate 414 facilitates the replacement and installation of the airflow distribution plate 44; the drain pipe 415 is used to discharge the liquid water entering the pulse plasma deodorization device 4.

[0048] In this embodiment, an auxiliary absorption component 45 is provided in the air outlet duct 413, and an adsorption material is provided in the auxiliary absorption component 45. A second side plate 416 is provided on the side of the chassis 41, and the second side plate 416 is arranged opposite to the auxiliary absorption component 45.

[0049] In the above embodiments, the adsorption material is used to adsorb ionic particles that have not reacted in the pulsed plasma reaction zone and continue to react in the auxiliary absorption component 45, which is equivalent to a reaction buffer area; the auxiliary absorption component 45 adopts a drawer-type structure, and the second side plate 416 facilitates the replacement of the auxiliary absorption component 45.

[0050] In the above embodiment, a controller and a sensor can be provided in the pulsed plasma deodorization device 4. Specifically, the sensor can be an oxidizing substance detection device installed at the deodorization outlet of the pulsed plasma deodorization device 4. The controller controls the power applied to the pulse power supply 42 based on the information fed back by the oxidizing substance detection device, so that the odor entering the pulsed plasma deodorization device 4 can be fully reacted.

[0051] In this embodiment, the spray tower 3 includes a tower body 31, a water tank 32 is provided in the lower part of the tower body 31, and a support plate 33 is arranged sequentially from bottom to top in the tower body 31. An absorbent packing layer 34 is provided on the lower support plate 33, and a demisting packing layer 35 is provided on the upper support plate 33. A nozzle 36 is provided above the support plate 33, and the nozzle 36 is connected to the water tank 32 through a spray pipe 37.

[0052] In the above embodiment, the spray tower 3 is used to remove dust and dissolve the collected waste gas, removing most of the dust particles and water-soluble odors. This step can remove a considerable portion of the odors, reducing the air volume that the subsequent pulse plasma deodorization equipment 4 needs to handle. Moreover, the removal of dust particles also effectively ensures the stability of the operation of the pulse plasma deodorization equipment 4.

[0053] In this embodiment, the tower body 31 is provided with an observation window 38, which is located near the support plate 33 and the nozzle 36. The main function of the observation window 38 is to observe the operation of the spray tower 3 and to replace the packing and repair the nozzle.

[0054] In this embodiment, an exhaust fan 15 is installed on the wall of the pig house 1. The exhaust fan 15 is used for the exchange of external air with the air in the feeding layer 11. Since most of the odorous gases in the pig house 1 are collected at the source and sent to the subsequent treatment equipment, the operation of the exhaust fan 15 does not affect the emission of odorous gases and can effectively reduce the humidity and temperature in the pig house 1.

[0055] In this embodiment, the pulsed plasma deodorization device 4 discharges the purified gas to the outside through the exhaust pipe.

[0056] The technical solution of this invention for odor collection and treatment in pigsties manages the odor from its source in pigsty 1. It uses negative pressure to collect the odor generated by fermentation in collection tank 12 and transfer it to subsequent treatment equipment. This significantly reduces the odor content in the exhaust gas during daily ventilation of pigsty 1, preventing any impact on the surrounding environment and residents. Furthermore, the modification to pigsty 1 only requires the addition of a suction pipe 14 within collection tank 12; the remaining spray tower 3 and pulse plasma deodorization equipment 4 are externally mounted and used independently. Therefore, this invention is highly feasible for practical application in pigsty 1, breaking through the technical barrier that prevents effective odor treatment in the pig farming industry.

[0057] Example 2

[0058] Combined with appendix Figure 1 To be continued Figure 8 The technical solution of this invention is a method for collecting and treating odors in pigsties of pig farms, applied to the odor collection and treatment system for pigsties of pig farms described in Example 1, comprising:

[0059] When the negative pressure fan 2 is powered on, it keeps the collection tank 12 under negative pressure. The negative pressure fan 2 draws the waste gas generated in the collection tank 12 to the spray inlet of the spray tower 3.

[0060] Inside the spray tower 3, the exhaust gas passes from bottom to top through the absorption packing layer 34 and the demisting packing layer 35, and the nozzle 36 sprays the absorption liquid from top to bottom. The dust particles in the exhaust gas are captured by the absorption liquid, and the water-soluble gases in the exhaust gas dissolve in the absorption liquid and react to produce salt compounds and water.

[0061] Insoluble or incompletely dissolved gases in the exhaust gas enter the pulsed plasma deodorization device 4. After passing through the airflow distribution plate 44, the exhaust gas enters the pulsed plasma reaction zone 412 evenly. The pulse power supply 42 outputs high voltage to the discharge electrode line 435, forming a corona zone between the discharge electrode line 435 and the discharge tube 432. When some exhaust gas passes through the corona zone, it is excited and ionized, and some exhaust gas collides with the high-energy active particles in the corona zone and is excited. Some of the particles in the excited state are reducing, and the other part is oxidizing. The reducing particles will preferentially combine with the oxidizing particles to carry out the oxidation-reduction reaction and generate odorless gas. The particles that have not undergone the oxidation-reduction reaction are adsorbed by the adsorption material and continue to react.

[0062] The purified exhaust gas is discharged into the external environment from the deodorization outlet of the pulse plasma deodorization device 4.

[0063] like Figure 1 As shown in the figure, the arrows indicate the direction of odor collection and treatment in pig farms.

[0064] In this embodiment, odorous gases such as NH3 and H2S are dissolved in the spray tower 3; in the pulsed plasma reaction zone 412, gas molecules are excited and ionized to generate excited-state particles, including strongly reducing particles, such as S. * H * N * And so on, including particles with strong oxidizing properties, such as O. * Oxidizing particles preferentially combine with reducing particles. As a result, odorous gas molecules are thoroughly activated in the pulsed plasma region, old chemical bonds break to form active particles, and particles recombine to form new chemical bonds and substances, thereby converting the original odor-causing substances into odorless simple small molecules.

[0065] This invention addresses the shortcomings of existing odor treatment methods in pig farms by modifying the pig farm 1 without affecting its basic layout. A suction pipe 14 is installed within the collection trough 12 of the pig farm 1, with several suction holes 141 to cover the area of ​​the collection trough 12 as much as possible. A negative pressure fan 2 maintains a slight negative pressure within the collection trough 12, thus preventing the malodorous gases produced by fermentation in the collection trough 12 from overflowing into the feeding layer 11. Based on the composition and characteristics of the malodorous waste gas produced by fermentation, it is first sprayed by a spray tower 3 to remove the odorous gases. The system removes dust particles and water-soluble gases. The remaining gases that are insoluble in water or not completely dissolved enter the pulse plasma deodorization device 4. Under the high voltage applied by the pulse power supply 42, the pulse plasma reaction component 43 bombards the odor molecules, oxygen and water vapor entering the pulse plasma reaction zone 412 with high-energy ions, causing the molecules to be ionized. After the molecules are ionized, the reducing particles will preferentially combine with the oxidizing particles to carry out oxidation-reduction reactions to generate harmless substances, thereby achieving the purpose of deodorization. The ionized particles that do not react in the pulse plasma reaction zone 412 will be adsorbed by the adsorption material and continue to react. Finally, the purified gas is discharged.

[0066] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A system for collecting and treating odors from pigsties in a pig farm, characterized in that, The system includes a pigsty, a negative pressure fan, a spray tower, and a pulsed plasma deodorization device. The pigsty includes a feeding layer and a collection trough located below the feeding layer. A grid is installed between the feeding layer and the collection trough. An air suction pipe is installed in the upper part of the collection trough, and air suction holes are opened on the air suction pipe. The air suction pipe is connected to the air inlet of the negative pressure fan. The air outlet of the negative pressure fan is connected to the spray inlet of the spray tower. The spray outlet of the spray tower is connected to the deodorization inlet of the pulsed plasma deodorization device. The deodorization outlet of the pulsed plasma deodorization device is connected to the external environment. The air intake hole is positioned with its opening facing downwards; after the negative pressure fan is started, a slight negative pressure is formed in the collection tank; The pulsed plasma deodorization equipment includes a chassis, a pulsed power supply, and a pulsed plasma reaction assembly; The pulsed plasma reactor includes a grounding bracket, on which an array of discharge tubes are arranged. The discharge tubes are hollow, and electrode supports are provided at both ends of the discharge tubes. A high-voltage porcelain insulator is connected between the electrode supports and the grounding bracket. A discharge electrode line is connected between the electrode supports and the electrode supports. The discharge electrode line is located inside the discharge tubes, and the output end of the pulse power supply is connected to the discharge electrode line. The discharge electrode includes an electrode body, discharge plates sleeved on the electrode body, a first retainer disposed between the discharge plates, and a second retainer disposed at both ends of the electrode body. The discharge plates are uniformly provided with raised discharge portions on their outer periphery. The upper and lower end faces of the first retainer and the end face of the second retainer near the discharge plates are provided with positioning grooves and positioning blocks. The positioning grooves and positioning blocks on the upper end face of the first retainer are offset from the positioning grooves and positioning blocks on the lower end face of the same first retainer. The discharge portions are confined between the positioning grooves and positioning blocks adjacent to the discharge portions, and the discharge portions protrude from the surfaces of the first retainer and the second retainer. The discharge portions of adjacent discharge plates are offset along the axial direction of the electrode body. The two ends of the electrode body are respectively connected to the electrode support.

2. The odor collection and treatment system for pigsties in a pig farm according to claim 1, characterized in that, The interior of the chassis includes, in sequence, an air inlet channel, a pulsed plasma reaction zone, and an air outlet channel along the direction from the deodorization inlet to the deodorization outlet. The pulsed plasma reaction component is disposed in the pulsed plasma reaction zone, and the pulsed power supply is electrically connected to the pulsed plasma reaction component.

3. The odor collection and treatment system for pigsties in a pig farm according to claim 2, characterized in that, An airflow distribution plate is provided inside the air intake channel, and the airflow distribution plate spans the cross-section of the air intake channel. A first side plate is provided on the side of the chassis, and the first side plate is positioned opposite to the airflow distribution plate. A drain pipe is provided at the bottom of the air intake channel.

4. The odor collection and treatment system for pigsties in a pig farm according to claim 3, characterized in that, An auxiliary absorption component is provided in the air outlet duct, and the auxiliary absorption component contains adsorption material. A second side plate is provided on the side of the chassis, and the second side plate is positioned opposite the auxiliary absorption component.

5. The odor collection and treatment system for pigsties in a pig farm according to claim 4, characterized in that, The spray tower includes a tower body, a water tank is provided in the lower part of the tower body, and support plates are arranged sequentially from bottom to top in the tower body. An absorbent packing layer is provided on the lower support plate, and an demister packing layer is provided on the upper support plate. A nozzle is provided above the support plate, and the nozzle is connected to the water tank through a spray pipe.

6. The odor collection and treatment system for pigsties in a pig farm according to claim 5, characterized in that, The tower body is provided with an observation window, which is located near the support plate and the nozzle.

7. A pig farm odor collection and treatment system according to any one of claims 1 to 6, characterized in that, The walls of the pigsty are equipped with exhaust fans, which are used for the exchange of outside air with the air in the feeding layer.

8. A method for collecting and treating odors from pigsties in a pig farm, characterized in that, The odor collection and treatment system for pig farm pigsties according to any one of claims 5 or 6 comprises: When the negative pressure fan is powered on, it keeps the collection tank under negative pressure. The negative pressure fan draws the waste gas generated in the collection tank to the spray inlet of the spray tower. Inside the spray tower, the exhaust gas passes from bottom to top through the absorption packing layer and the demister packing layer, while the nozzles spray the absorption liquid from top to bottom. The dust particles in the exhaust gas are captured by the absorption liquid, and the water-soluble gases in the exhaust gas dissolve in the absorption liquid and react to produce salt compounds and water. Insoluble or incompletely dissolved gases in the exhaust gas enter the pulsed plasma deodorization equipment. After passing through the airflow distribution plate, the exhaust gas enters the pulsed plasma reaction zone evenly. The pulsed power supply outputs high voltage to the discharge electrode line, forming a corona zone between the discharge electrode line and the discharge tube. Some of the exhaust gas is excited and ionized when passing through the corona zone, while some of the exhaust gas is excited by colliding with the high-energy active particles in the corona zone. Some of the excited particles are reducing, while others are oxidizing. The reducing particles preferentially combine with the oxidizing particles to carry out an oxidation-reduction reaction, generating odorless gas. The particles that have not undergone an oxidation-reduction reaction are adsorbed by the adsorption material and continue to react. The purified exhaust gas from Pulse plasma deodorization equipment The odor-removing outlet discharges the odor into the external environment.

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