CN104289077A - Ammonia purification and collection device for livestock and poultry breeding house - Google Patents

Abstract

The invention belongs to an ammonia purification and collection device for a livestock and poultry breeding house. The ammonia purification and collection device comprises a water curtain box and an extraction hood, wherein the water curtain box is arranged outside the roof of the livestock and poultry breeding house; the extraction hood is arranged inside the roof and is connected with the water curtain box through a connecting pipe; a water curtain box base is arranged at the bottom of the water curtain box; the exterior of the water curtain box consists of two front-side breathable plates parallel to each other and two side-face breathable plates parallel to each other; a triangular rack is arranged on the top of the water curtain box; a water inlet and a water outlet are formed below the front-side breathable plates; a water tank is arranged at the bottom inside the water curtain box; a wet curtain plate is arranged in the water tank; an annular water pipe is arranged on the wet curtain plate; an axial flow ventilator, a float switch and an air cooler water pump are arranged at the bottom in the water curtain box; an inner air pipe and an outer air pipe are arranged at the lower end of the connecting pipe; and air ducts are arranged on two sides of the bottom of the outer air pipe. According to the device disclosed by the invention, ammonia in the livestock and poultry breeding house enters the water curtain box through the air ducts and is fully contacted with the wet curtain plate, so that the ammonia concentration is effectively reduced. Meanwhile, the ammonia can be cyclically collected by the water curtain box, and the ammonia is conveniently recycled.

Description

Ammonia purification and collection device for livestock and poultry houses

technical field

The invention belongs to a gas recovery device, in particular to an ammonia purification and collection device for livestock and poultry breeding houses.

Background technique

With the rapid development of animal husbandry in my country, the scale, intensification and mechanization of livestock farms are gradually increasing, but environmental disputes often occur in animal husbandry villages and large-scale breeding houses. The air pollution in livestock and poultry farms mainly comes from the odorous gases emitted in the farms. After the fermentation of livestock and poultry manure and sewage, a large amount of harmful gases such as ammonia will be produced, resulting in an increase in ammonia emissions per unit area in the breeding house. Ammonia gas not only easily causes animal stress, greatly affects the growth rate and feed-to-meat ratio of livestock and poultry, but also seriously pollutes the environment. production and life. Especially in winter and spring when the climate is cold, in order to improve the thermal insulation effect of livestock and poultry breeding houses, most farmers close the doors and windows to reduce ventilation. The ammonia content in livestock and poultry breeding houses will be higher, which seriously affects the The normal growth of livestock and poultry has caused the economic loss of the farmers, and once the ventilation is done randomly, the temperature in the house will change too much, which will easily cause the livestock and poultry to catch a cold, and also cause a waste of heating and heat preservation energy.

Ammonia in the air of livestock and poultry breeding houses mainly comes from the digestion of livestock and poultry intestines and stomachs, the corruption of organic matter such as feces and urine, feed residues and bedding, and the decomposition of body waste by bacteria. It is a colorless, toxic, and strong pungent odor gas. , the lowest concentration that can be felt is 5.3ppm, and ammonia gas is produced faster when the litter is wet, the pH is suitable, the temperature is high, and there is a lot of feces. The content of ammonia in livestock and poultry houses depends on the stocking density, ventilation, ground structure, feeding management level, and manure removal. The aqueous solution of ammonia gas is alkaline and irritating to mucous membranes. In severe cases, alkali burns can occur, which can cause tearing, burning pain, inflammation of the cornea and conjunctiva, and visual impairment. Ammonia entering the respiratory tract can cause cough, tracheitis, bronchitis, pulmonary edema and hemorrhage, dyspnea, and suffocation. Ammonia has reducing properties, and the hydrogen atoms in its molecules can be replaced by metals one by one to form metal amides or nitrides. Therefore, ammonia enters the blood from the alveoli and can combine with hemoglobin to change heme into methaemoglobin. Reduce the oxygen-carrying capacity of hemoglobin, the blood alkali storage and the oxidation performance of heme, resulting in anemia and tissue hypoxia. Ammonia is a recognized stress source and the most harmful gas in livestock and poultry houses. Ammonia can induce various respiratory diseases in poultry, pigs and other animals, and can induce or increase the incidence of broiler ascites. /kg ammonia concentration, will reduce the animal's resistance to infection. According to measurements, when the concentration of ammonia in the chicken house reaches 20mg/L, the incidence of various common diseases and frequently-occurring diseases will suddenly increase. As a result, the egg production of chickens will be reduced, and the weight gain and feed utilization efficiency of chicks will be greatly reduced. A poultry farm with a scale of 560,000 can discharge 10.5kg of ammonia gas per hour, and a pig farm with an annual output of 80,000 pigs can discharge more than 130kg of ammonia gas into the atmosphere per hour, and excessive ammonia gas emissions not only Caused a large amount of feed resource waste, and increased environmental pressure.

For this reason, the following studies have been carried out on the control of reducing ammonia content in livestock and poultry breeding houses. Research 1: By reasonably controlling the intake of protein in livestock and poultry diets, reducing the amount of amino acids under the catalysis of spoilage microorganisms urease and uricase The amount of ammonia gas produced by hydrolysis, and at the same time adding zeolite powder, bentonite and other silicates, fermented carbohydrates, enzyme preparations, plant extracts, etc. Sprinkle ferrous sulfate in manure slabs or septic tanks to inhibit the fermentation and decomposition of manure, or add live bacteria preparations, thereby effectively reducing the concentration of ammonia; Study 3: By increasing the height of livestock and poultry breeding houses, installing micro-current antibacterial and antibacterial Ammonia system, ammonium sulfate recovery system and other methods to reduce ammonia gas in livestock and poultry breeding houses.

Although these research results have reduced the ammonia content in livestock and poultry breeding houses to a certain extent and purified the air quality in livestock and poultry breeding houses, they are not suitable for It is popularized and applied in small and medium-sized livestock and poultry breeding houses and small family breeding houses. In the existing livestock and poultry breeding houses, the density of ammonia gas is lower than that of air, it is distributed in the upper part of the livestock and poultry breeding houses, and it is easy to dissolve in water. The ammonia gas collection device is used to collect and purify the ammonia gas, while the existing ammonia gas Most of the gas collection devices have complicated structures, are not easy to operate, and the later maintenance costs are relatively high. Breeding requirements for low ammonia content in poultry houses.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide an ammonia gas purification and collection device for livestock and poultry breeding houses. The ammonia gas enters the water curtain box through the air groove and fully contacts with the wet curtain plate, which effectively reduces the ammonia content in the livestock and poultry breeding house. At the same time, the water in the water curtain box can circulate and collect ammonia gas, which facilitates the recycling of ammonia gas. .

The purpose of the present invention is achieved like this:

An ammonia purification and collection device for livestock and poultry breeding houses, comprising a water curtain box arranged on the outside of the roof of the livestock and poultry breeding house and an exhaust hood arranged on the inside of the roof and connected to the water curtain box through a connecting pipe, characterized in that : the bottom of the water curtain box is provided with a water curtain box base, and the outside of the water curtain box is composed of two parallel front air-permeable panels and two parallel side air-permeable panels, and a column is arranged between the front air-permeable panels and the side air-permeable panels. There is a tripod on the top of the water curtain box, a top plate is arranged on the top of the tripod, a water inlet and a water outlet are arranged under the front air-permeable plate, a water tank is arranged at the bottom of the water curtain box, and an annular water channel is arranged around the water channel. The curtain plate and the wet curtain plate are provided with an annular water pipe, and the bottom of the annular water pipe is provided with a water hole. A base is provided in the middle of the bottom of the water curtain box, and an axial flow fan is arranged on the base. The rotation direction of the axial flow fan blade is in line with the ground. Parallel, one side of the base is provided with a float switch, and the other side of the base is provided with a cooling fan water pump, the float switch is connected to the water inlet, the cooling fan water pump is connected to the annular water pipe, and the upper end of the connecting pipe is connected to the axial flow fan. There is an upper flange between the pipe and the axial flow fan, a lower flange at the lower end of the connecting pipe, an inner air duct at the bottom of the lower flange, and an outer air duct outside the inner air duct. An air groove is arranged, and the outer air pipe communicates with the air groove.

The base of the water curtain box includes a bottom plate arranged at the bottom of the water curtain box, a vertical plate connected to the outer end of the bottom plate, and a panel vertically connected to the vertical plate and arranged on the roof. The bottom of the water curtain box and the bottom plate are fixedly connected by bolts, and the panel It is fixedly connected to the C-shaped steel on the roof of the livestock and poultry breeding house by half round head screws, and the outer surface of the base is coated with a layer of zinc.

The tripod includes a strut and a strut vertically connected to the strut, the strut is provided with an ammonia water density meter, the bottom of the ammonia water density meter is set in the water tank, and the angle between the strut and the top plate is 15°-30° .

Ventilation holes are arranged on the ventilation plate, and the opening direction of the ventilation holes is downward.

The annular waterway includes an inner waterway and an outer waterway, and the distance between the inner waterway and the outer waterway is 2CM-3CM.

The thickness of the wet curtain plate is 3CM-5CM.

Both the water inlet and the water outlet are provided with valves.

The interior of the water curtain box is made of iron material, and the exterior material is stainless steel or glass fiber reinforced plastic or plastic.

The top plate is composed of an upper layer and a lower layer, and the upper and lower layers are overlapped and welded to form a double-slope structure, and the outer layer is provided with an anti-rust coating.

The upper part of the inner air duct is provided with a slideway, and a filter outer frame is arranged in the slideway, and a filter screen is arranged in the filter outer frame, and a circular fixing hole is opened on the wall of the inner air duct below the slideway, and the There are two circular fixing holes on the wall of the outer air duct, and the outer air duct is sleeved on the inner air duct. The circular fixing holes have the same size and are fixed by positioning pins.

The air groove forms an included angle of 30°-45° with the ground.

The present invention has following positive effect:

1. The present invention is installed on the roof of the livestock and poultry breeding house, fully utilizes the principle that the density of ammonia gas is lower than that of air, and forms a negative pressure in the water curtain box through the axial flow fan, so that the ammonia in the breeding house passes through the wet curtain and is absorbed Absorbed by the water curtain in the wet curtain, it effectively reduces the concentration of ammonia in the livestock and poultry breeding house, enhances the stress resistance of livestock and poultry, and reduces the incidence of livestock and poultry;

2. Use an ammonia meter to measure the ammonia concentration on the ground in a poultry breeding house, the roof in the breeding house, and inside and outside the water curtain box. The results are as follows:

Detection position Breeding house floor Breeding house top Water curtain box interior Water curtain box exterior Ammonia concentration 55-60ppm 65-76ppm 37-42ppm 0-4ppm

It can be seen that the ammonia concentration at the top of the breeding house is 16ppm higher than the ammonia concentration on the ground in the breeding house. The ammonia gas after passing through the water curtain box is absorbed by the wet curtains around the water curtain box, and the concentration of ammonia gas discharged from the water curtain box is It is 0-4ppm, which is far lower than the national emission standard, effectively solving the environmental pollution caused by the discharge of ammonia gas;

3. The cooling fan water pump in the water curtain box can pump the water in the water tank to the annular water pipe above the wet curtain, and evenly flow water down through the water holes at the bottom of the annular water pipe, so that the four wet curtains in the water curtain box can continue When there is water, the float switch is connected to the water inlet system to control the constant water volume in the water curtain box;

4. The whole device of the present invention is simple in structure, easy to install, and has obvious effect of absorbing ammonia. Promotion and application in livestock and poultry breeding houses.

5. Select two pig houses with the same structure, facilities, airtight conditions, shape and size, and the same number of pigs. One of them is the control group and the other is the experimental group. Fully ventilate the two pig houses on sunny days Finally, the ammonia concentration on the ground was measured, which were 4.8 mg·m ^-3 and 4.9 mg·m ^-3 respectively, and the results were recorded. After the piggery was sealed, the experiment was started.

The following table shows the measurement results of the ammonia concentration in the control group and the experimental group. Unit: /(mg·m ^-3 )

Experiment days 0d 1d 2d 3d 4d 5d 6d 7d control group 4.8 29.7 43.2 75.4 96.7 109.3 131.1 144.6

3 hours a day 4.9 11.3 13.6 12.7 12.1 13.2 12.5 11.8 6 hours a day 4.9 6.8 8.3 7.6 6.9 8.5 6.6 7.7

It can be seen from the above table that the present invention was not installed in the control group, and the ammonia concentration rose from 4.8mg·m ^-3 to 143.6mg·m ^-3 , a total increase of 139.8mg·m ^-3 in 7 days, with an average increase of 19.97mg per day ·m ^-3 , of which, the average daily increase of 22.98mg·m ^-3 in the first 4 days and 15.97mg·m ^-3 in the last 3 days, although the increase of the ammonia concentration in the house decreased significantly in the last 3 days, but the Ammonia gas concentration continues to be high for a long time, which can easily trigger the stress response of animals. In the experimental group, the device of the present invention was installed, and the experimental group measured ammonia 3 times a day, respectively at 8:00, 14:00, and 20:00. After the device of the present invention continued to run for 3 hours on the first day, the ammonia in the pig house The ammonia gas concentration is reduced to 11.3mg·m ^-3 , which will basically not reduce the resistance of animals. After 6 hours of continuous operation, the ammonia gas concentration in the pig house will be reduced to 6.8mg·m ^-3 , which will not reduce the resistance of animals at all. This fully demonstrates that the present invention has a very obvious effect in reducing the ammonia concentration in the house. Through 7 days of observation, it can be seen that the ammonia concentration in the house can be controlled below 13.6 mg·m ^-3 after 3 hours of operation every day , running for 6 hours a day, the ammonia concentration in the house can be controlled below 8.5mg·m ^-3 , which ensures the normal eating and growth of pigs. In addition, the present invention does not need to exchange with outside air in winter, and will not have any impact on the temperature inside the house. The air flow rate in the house is 0.2-0.3m·s ^-1 , and the noise is less than 50dB, which is not harmful to the normal growth of pigs. Impact.

Description of drawings

Fig. 1 is the front view of the present invention.

Figure 2 is a side view of the present invention.

Fig. 3 is a top sectional view of the water curtain box.

Figure 4 is a partial schematic diagram of the exhaust hood.

In the figure: 1. Water curtain box 2. Connecting pipe 3. Exhaust cover 4. Water curtain box base 5. Front ventilating panel 6. Side ventilating panel 7. Column 8. Tripod 9. Top plate 10. Water inlet 11. Outlet Nozzle 12. Water tank 13. Annular water channel 14. Wet curtain plate 15. Annular water pipe 16. Water hole 17. Base 18. Axial flow fan 19. Blade 20. Float switch 21. Cooler pump 22. Upper flange 23. Lower flange 24. Inner air pipe 25. Outer air pipe 26. Air groove 27. Bottom plate 28. Vertical plate 29. Panel 30. Bolt 31. Round head screw 32. C-shaped steel 33. Strut 34. Strut 35. Ventilation Hole 36. Valve 37. Slideway 38. Filter frame 39. Filter screen 40. Circular fixing hole 41. Locating pin 42. Anti-rust coating 43. Ammonia water density meter.

Detailed ways

Embodiment 1, as shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of ammonia purifying and collecting device for livestock and poultry breeding house, comprises the water curtain box 1 that is arranged on the outside of the livestock and poultry breeding house roof and The exhaust hood 3 connected to the water curtain box 1 through the connecting pipe 2 is arranged inside the roof. The water curtain box base 4 is arranged at the bottom of the water curtain box 1. The outside of the water curtain box 1 is composed of two parallel front air-permeable panels 5 and two Parallel side ventilating panels 6 are formed, a column 7 is arranged between the front ventilating panel 5 and the side ventilating panel 6, a tripod 8 is arranged on the top of the water curtain box 1, a top plate 9 is arranged above the tripod 8, and a top panel 9 is arranged on the top of the front ventilating panel 5. There is a water inlet 10 and a water outlet 11, a water tank 12 is arranged at the inner bottom of the water curtain box 1, an annular water channel 13 is arranged around the water tank 12, a wet curtain plate 14 is arranged in the annular water channel 13, and an annular water pipe 15 is arranged on the wet curtain plate 14 , the bottom of the annular water pipe 15 is provided with a water hole 16, the middle of the bottom of the water curtain box 1 is provided with a base 17, the base 17 is provided with an axial flow fan 18, and the top of the axial flow fan 18 is provided with a rotating direction parallel to the ground. The blade 19, the base 17-side is provided with a float switch 20, the other side of the base 17 is provided with a cooling fan water pump 21, the float switch 20 is connected to the water inlet 10, the cooling fan water pump 21 is connected to the annular water pipe 15, and the connecting pipe 2 The upper end is connected with the axial flow fan 18, the upper flange 22 is arranged between the connecting pipe 2 and the axial flow fan 18, the lower flange 23 is arranged at the lower end of the connecting pipe 2, and the inner air duct is arranged at the bottom of the lower flange 23 24. An outer air duct 25 is arranged outside the inner air duct 24, and air grooves 26 are arranged on both sides of the bottom of the outer air duct 25. The outer air duct 25 communicates with the air groove 26. The water curtain box base 4 includes a The base plate 27 at the bottom of the box 1, the vertical plate 28 connected to the outer end of the base plate 27, and the panel 29 vertically connected to the vertical plate 28 are arranged on the roof. Head screw 31 is fixedly connected with C-shaped steel 32 on the roof of the livestock and poultry breeding house, and the outer surface of base 4 is coated with a layer of zinc. The ammonia water density meter 43, the bottom of the ammonia water density meter 43 is arranged in the water tank 12, the angle between the strut 33 and the top plate 9 is 15°-30°, the air vent plate is provided with air holes 35, and the opening direction of the air holes 35 is downward, The annular waterway 13 includes an inner waterway and an outer waterway, the distance between the inner waterway and the outer waterway is 2CM-3CM, the thickness of the wet curtain plate 14 is 3CM-5CM, and the water inlet 10 and the water outlet 11 are provided with valves 36. The interior of the water curtain box 1 is made of iron material, and the external material is stainless steel or glass fiber reinforced plastic or plastic. The top plate 9 is composed of an upper layer and a lower layer. The upper and lower layers are overlapped and welded to form a double-slope structure. Coating 42, inner air duct 24 top is provided with slideway 37, is provided with filter outer frame 38 in slideway 37, is provided with filter screen 39 in filter outer frame 38, is provided with on the inner air duct 24 pipe wall below slideway 37 There is a circular fixing hole 40, the same side of the outer There are two circular fixing holes 40 on the wall of the air duct 25. The outer air duct 25 is sleeved on the inner air duct 24. The circular fixing holes 40 have the same size and are fixed by positioning pins 41. The air groove 26 is at an angle of 30° to the ground. -45° included angle.

When the present invention is in use, the device is fixedly installed on the roof of the livestock and poultry breeding house, the water curtain box is partially installed on the outside of the roof, and the exhaust hood is installed on the inside of the roof, and the middle is connected by a connecting pipe. When it is higher, in order to achieve the best ventilation effect, the height of the outer air duct sleeved on the inner air duct is raised, so that the circular fixing hole on the upper part of the inner air duct is aligned with the circular fixing hole of the outer air duct, and passes through Fix the positioning pin, then pour water into the water tank in the water curtain box, the water in the water tank will soak the bottom of the wet curtain plate, turn on the water pump of the cooling fan, pump the water in the water tank into the annular water pipe above the wet curtain, and the water will flow from the annular The bottom of the water pipe flows down to form a water curtain in the wet curtain plate, and completely soak the upper and middle parts of the wet curtain plate, and then turn on the axial flow fan, and the negative pressure formed by the axial flow fan will blow the air in the livestock and poultry breeding house. The ammonia gas is sucked into the water curtain box, and the ammonia gas entering the water curtain box is absorbed by the wet curtain plate around the water curtain box, and the water flowing down from the wet curtain plate falls into the water tank and is pumped to the wet curtain by the water pump of the cooling fan again. In the annular water pipe above the plate, the water in the water curtain box is guaranteed to circulate between the wet curtain plate and the water tank, so as to achieve the effect of repeatedly absorbing ammonia gas. When the total water volume in the water curtain box is lower than the set value, The float switch sinks, and the water inlet system connected to the water inlet starts. At the same time, the water inlet valve is opened, and water is added to the water curtain box. When the water volume in the water curtain box reaches the set value, the float switch is closed, and the water inlet system is stopped. Stop water from the water inlet, so as to ensure the constant total water volume in the water curtain box. The circulating water in the tank absorbs ammonia gas many times, and the concentration of ammonia water continues to increase. The concentration of ammonia water is observed by ammonia water density meter. When the required concentration of ammonia water is reached, Open the water outlet valve to collect the ammonia water.

Embodiment 2, as shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of ammonia purifying and collecting device for livestock and poultry breeding house, comprises the water curtain box 1 that is arranged on the outside of the livestock and poultry breeding house roof and The exhaust hood 3 connected to the water curtain box 1 through the connecting pipe 2 is arranged inside the roof. The water curtain box base 4 is arranged at the bottom of the water curtain box 1. The outside of the water curtain box 1 is composed of two parallel front air-permeable panels 5 and two Parallel side ventilating panels 6 are formed, a column 7 is arranged between the front ventilating panel 5 and the side ventilating panel 6, a tripod 8 is arranged on the top of the water curtain box 1, a top plate 9 is arranged above the tripod 8, and a top panel 9 is arranged on the top of the front ventilating panel 5. There is a water inlet 10 and a water outlet 11, a water tank 12 is arranged at the inner bottom of the water curtain box 1, an annular water channel 13 is arranged around the water tank 12, a wet curtain plate 14 is arranged in the annular water channel 13, and an annular water pipe 15 is arranged on the wet curtain plate 14 , the bottom of the annular water pipe 15 is provided with a water hole 16, the middle of the bottom of the water curtain box 1 is provided with a base 17, the base 17 is provided with an axial flow fan 18, and the top of the axial flow fan 18 is provided with a rotating direction parallel to the ground. The blade 19 is provided with a float switch 20 on one side of the base 17, and a cooler water pump 21 is provided on the other side of the base 17. The float switch 20 is connected to the water inlet 10, and the cooler water pump 21 is connected to the annular water pipe 15. The connecting pipe 2 The upper end is connected with the axial flow fan 18, the upper flange 22 is arranged between the connecting pipe 2 and the axial flow fan 18, the lower flange 23 is arranged at the lower end of the connecting pipe 2, and the inner air duct is arranged at the bottom of the lower flange 23 24. An outer air duct 25 is arranged outside the inner air duct 24, and air grooves 26 are arranged on both sides of the bottom of the outer air duct 25. The outer air duct 25 communicates with the air groove 26. The water curtain box base 4 includes a The base plate 27 at the bottom of the box 1, the vertical plate 28 connected to the outer end of the base plate 27, and the panel 29 vertically connected to the vertical plate 28 are arranged on the roof. Head screw 31 is fixedly connected with C-shaped steel 32 on the roof of the livestock and poultry breeding house, and the outer surface of base 4 is coated with a layer of zinc. The ammonia water density meter 43, the bottom of the ammonia water density meter 43 is arranged in the water tank 12, the angle between the strut 33 and the top plate 9 is 15°-30°, the air vent plate is provided with air holes 35, and the opening direction of the air holes 35 is downward, The annular waterway 13 includes an inner waterway and an outer waterway, the distance between the inner waterway and the outer waterway is 2CM-3CM, the thickness of the wet curtain plate 14 is 3CM-5CM, and the water inlet 10 and the water outlet 11 are provided with valves 36. The interior of the water curtain box 1 is made of iron material, and the external material is stainless steel or glass fiber reinforced plastic or plastic. The top plate 9 is composed of an upper layer and a lower layer. The upper and lower layers are overlapped and welded to form a double-slope structure. Coating 42, inner air duct 24 top is provided with slideway 37, is provided with filter outer frame 38 in slideway 37, is provided with filter screen 39 in filter outer frame 38, is provided with on the inner air duct 24 pipe wall below slideway 37 There is a circular fixing hole 40, the same side of the outer There are two circular fixing holes 40 on the wall of the air duct 25. The outer air duct 25 is sleeved on the inner air duct 24. The circular fixing holes 40 have the same size and are fixed by positioning pins 41. The air groove 26 is at an angle of 30° to the ground. -45° included angle.

When the present invention is in use, the device is first fixedly installed on the roof of the livestock and poultry breeding house, the water curtain box is partially installed on the outside of the roof, and the exhaust hood is installed on the inside of the roof, and the middle is connected by a connecting pipe. When it is low, in order to ensure the normal feeding and growth of the animals in the house, the doors and windows need to be closed tightly to strengthen the heat preservation effect in the house, which will greatly increase the ammonia concentration on the ground in the breeding house. At this time, it is necessary to lower the inner air duct. The height of the outer air duct on the top makes the air duct close to the ground, making it easier for ammonia gas to enter the air duct. At the same time, the circular fixing hole on the upper part of the inner air duct is aligned with the circular fixing hole of the outer air duct, and fixed by positioning pins. Then turn on the axial flow fan first, and the ammonia gas in the livestock and poultry breeding house will be sucked into the water curtain box through the negative pressure formed by the axial flow fan, and the ammonia gas will fill the entire water curtain box and then flow into the water tank in the water curtain box Inject water in the water tank, the water in the water tank will soak the bottom of the wet curtain plate, observe the ammonia water concentration meter, then turn on the water pump of the air cooler, pump the water in the water tank into the annular water pipe above the wet curtain, and the water will flow down from the bottom of the annular water pipe to make the wet A water curtain is formed in the curtain panel, and the upper and middle parts of the wet curtain panel are completely soaked. The ammonia gas in the water curtain box is absorbed by the wet curtain panels around the water curtain box, and the water flowing down from the wet curtain panel falls into the water tank. It is again pumped into the annular water pipe above the wet curtain plate by the water pump of the cooling fan, thus ensuring the circulation of the water in the water curtain box between the wet curtain plate and the water tank, and achieving the effect of repeatedly absorbing ammonia gas. When the water curtain box When the total water volume is lower than the set value, the float switch sinks, and the water inlet system connected to the water inlet starts. At the same time, the water inlet valve is opened to add water to the water curtain box. When the water volume in the water curtain box reaches the set value, The float switch is closed, the water inlet system is stopped, and the water inlet stops water intake, thereby ensuring the constant total water volume in the water curtain box. The circulating water in the tank absorbs ammonia gas many times, and the concentration of ammonia water continues to increase. The ammonia water density is observed by the ammonia water density meter. concentration, when the required concentration of ammonia water is reached, the water outlet valve is opened to collect the ammonia water.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes, within the spirit and principles of the present invention, Any modifications, equivalent replacements, improvements, etc., should be included within the protection scope of the present invention.

Claims (10)

1. A kind of ammonia purification and collection device for livestock and poultry breeding house, comprising the water curtain box that is arranged on the outside of the livestock and poultry breeding house roof and the exhaust hood that is arranged on the inside of the roof and is connected with the water curtain box by connecting pipe, its It is characterized in that: the bottom of the water curtain box is provided with a water curtain box base, and the exterior of the water curtain box is composed of two parallel front air-permeable panels and two parallel side air-permeable panels, and a water inlet and a water outlet are arranged under the front air-permeable panels , There is a water tank at the bottom of the water curtain box, a wet curtain plate is set around the water tank, an annular water pipe is arranged on the wet curtain plate, a water hole is arranged at the bottom of the annular water pipe, a base is arranged in the middle of the bottom of the water curtain box, and a shaft is arranged on the base Flow type fan, one side of the base is provided with a float switch, the other side of the base is provided with a cooling fan water pump, the float switch is connected to the water inlet, the cooling fan water pump is connected to the annular water pipe, and the upper end of the connecting pipe is connected to the axial flow fan. There is an upper flange between the connecting pipe and the axial flow fan, a lower flange at the lower end of the connecting pipe, an inner air duct at the bottom of the lower flange, an outer air duct outside the inner air duct, and an outer air duct Air grooves are arranged on both sides of the bottom, and the outer air pipe communicates with the air grooves. 2. The ammonia gas collection device for livestock and poultry breeding houses according to claim 1, characterized in that: the base of the water curtain box includes a bottom plate arranged at the bottom of the water curtain box, and a vertical plate connected to the outer end of the bottom plate 1. Vertically connect with the vertical plate and set the panel on the roof, the bottom of the water curtain box and the bottom plate are fixedly connected by bolts, the panel is fixedly connected with the C-shaped steel on the roof of the livestock and poultry breeding house through half-round head screws, and the outer surface of the base is coated with a layer of zinc. 3. The ammonia collection device for livestock and poultry breeding houses according to claim 1, characterized in that: the tripod includes a strut, a strut vertically connected to the strut, and a clamp between the strut and the top plate The angle is 15°-30°. 4. The ammonia collection device for livestock and poultry breeding houses according to claim 1, characterized in that: said ventilation plate is provided with ventilation holes, and the opening direction of the ventilation holes is downward. 5. The ammonia collection device for livestock and poultry breeding houses according to claim 1, characterized in that: the thickness of the wet curtain plate is 3CM-5CM. 6. The ammonia collection device for livestock and poultry breeding houses according to claim 1, characterized in that valves are provided at the water inlet and the water outlet. 7. The ammonia gas collection device for livestock and poultry breeding houses according to claim 1, characterized in that: the interior of the water curtain box is made of iron material, and the exterior material is stainless steel, glass fiber reinforced plastic or plastic. 8. The ammonia gas collection device for livestock and poultry breeding houses according to claim 1, characterized in that: the top plate is composed of an upper layer and a lower layer, and the upper and lower layers are overlapped and welded to form a double-slope structure, and the outer layer The surface is provided with an anti-rust coating. 9. The ammonia collection device for livestock and poultry breeding houses according to claim 1, characterized in that: the upper part of the inner air duct is provided with a slideway, the slideway is provided with a filter frame, and the filter frame is provided with a There is a filter screen, and there is a circular fixing hole on the wall of the inner air duct under the slideway, and two circular fixing holes are opened on the wall of the outer air duct on the same side, and the outer air duct is sleeved on the inner air duct. The circular fixing holes have the same size and are fixed by positioning pins. 10. The ammonia gas collection device for livestock and poultry breeding houses according to claim 1, characterized in that: the air duct forms an angle of 30°-45° with the ground.