Biogas purification equipment

Abstract

The invention provides biogas purification equipment. The biogas purification equipment comprises a biogas digester, a primary purification device and a secondary purification device, the primary purification device comprises a water tank, an exhaust port is formed in the side wall of the water tank, an air distribution assembly is further arranged on the water tank and comprises a shell, a T-shaped pipe is rotationally arranged on the shell in a penetrating mode, an air inlet is further formed in the shell, an air inlet hole and an exhaust hole are further formed in the T-shaped pipe, and a double-shaft gear motor is further arranged on the water tank. One power output end of the double-shaft gear motor is in transmission connection with the T-shaped pipe; an inlet of the induced draft fan extends into the biogas digester, and an outlet of the induced draft fan is connected with the gas inlet through a connecting pipe; the secondary purification device comprises a desulfurizing agent storage tank, a drying agent storage tank, a feeding assembly, a purification assembly and a discharging assembly; the other power output end of the double-shaft gear motor is in transmission arrangement with the feeding assembly, and the exhaust port is communicated with the purification assembly. The equipment provided by the invention can efficiently remove ammonia gas, water vapor and hydrogen sulfide in the biogas, and ensures the biogas purification effect.

Description

Technical Field

[0001] The invention belongs to the technical field of biogas purification, and in particular relates to biogas purification equipment. Background Art

[0002] In recent years, with the rapid development of the rural economy, the large-scale breeding of livestock and poultry in rural areas has improved people's living standards, but it has also brought a large amount of livestock and poultry manure that is difficult to deal with, causing rural environmental pollution and ecological damage. The problem has become increasingly prominent. At present, China's annual livestock and poultry manure production has reached 1.9 billion tons, more than twice the amount of industrial solid waste emissions. Among the various existing livestock and poultry manure treatment technologies, the commonly used method is biogas pollution control.

[0003] Biogas is a combustible gas with high calorific value and is a biomass energy that is widely and easily available. Its calorific value is about 20-25MJ / m3, that is, the calorific value of each cubic meter of biogas is equivalent to 0.8kg of standard coal. Compared with other fuel gases, it has good anti-explosion performance and is a recognized clean renewable fuel. The development and utilization of biogas has a history of several decades. Using biogas as a way to control environmental pollution not only reduces environmental pollution, but also obtains energy and efficient organic fertilizer. Biogas can be produced by anaerobic fermentation of livestock and poultry manure, and then the biogas is purified and the methane is separated. This can not only reduce people's dependence on fossil energy such as coal, oil, and natural gas, but also meet people's growing demand for energy. It is one of the effective ways to solve energy problems.

[0004] Only methane in biogas can be used as energy. The rest of the gases, such as hydrogen sulfide and ammonia, are waste gases and are also toxic. Therefore, before using biogas, it needs to be purified and refined.

[0005] However, the existing biogas purification and refining equipment is expensive and has high requirements for operating specifications, making it difficult to promote its use. If the biogas is directly burned, it is extremely dangerous. In the existing technology, methane can be separated for use using a semipermeable membrane, but the separation efficiency is low and the effect is not good. Therefore, it is necessary to design a new device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a biogas purification device in view of the deficiencies in the prior art. The specific scheme is as follows: A biogas purification device comprises a biogas tank, a primary purification device and a secondary purification device which are arranged in coordination; the primary purification device comprises a water tank, the top of the water tank is provided with a water inlet, the upper side wall of the water tank is provided with an exhaust port, the bottom of the water tank is provided with a drain port, the water tank is also provided with an air distribution component, the air distribution component comprises a shell arranged on the top of the water tank, a T-shaped tube extending into the water tank is penetrated and rotatably provided on the shell, the shell is also provided with an air inlet, the T-shaped tube located in the shell is provided with a plurality of air inlet holes, the bottom of the T-shaped tube is provided with a plurality of exhaust holes, a double-shaft reduction motor is also fixedly provided above the water tank, one of the power output ends of the double-shaft reduction motor drives the T-shaped tube to rotate through a first bevel gear transmission structure. ; An induced draft fan is provided outside the biogas tank, the inlet of the induced draft fan extends into the biogas tank, and the outlet of the induced draft fan is connected to the air inlet through a connecting pipe; the secondary purification device includes a desulfurizer storage tank and a desiccant storage tank fixedly mounted on the mounting frame, and the desulfurizer storage tank and the desiccant storage tank are both arranged on the feeding assembly, and the secondary purification device also includes a purification assembly and a discharge assembly associated with the feeding assembly, and a collecting box is provided under the discharge assembly; the other power output end of the dual-axis reduction motor is transmitted to the feeding assembly through a second bevel gear transmission structure, and the exhaust port is connected to the purification assembly through an air pipe 1; the induced draft fan and the dual-axis reduction motor are both electrically connected to the controller.

[0007] Based on the above, the purification component includes a purification box, the side wall of the purification box is provided with an air outlet, the top of the purification box is provided with a vulcanizing agent feeding port, the air outlet is provided with an exhaust pipe, and a V-shaped tube made of copper is passed through the purification box, the end of the V-shaped tube located outside the purification box is a desiccant discharge port, and the end located inside the purification box is provided with an exhaust port, the V-shaped tube is also provided with an air inlet and a desiccant inlet extending to the outside of the purification box, and the exhaust port is connected to the air distribution component arranged in the purification box through an air supply pipe 2; the air inlet is connected to the air supply pipe 1; the feeding assembly includes a fixed feed plate 1, a rotating feed plate, and a fixed feed plate 2, which are coaxially superimposed and arranged in an annular shape, and the rotating feed plate is transmission-connected to the other power output end of the dual-axis reduction motor through the second bevel gear transmission structure, and a vulcanizing agent inlet 2 and a desiccant inlet are provided on the rotating feed plate, and a vulcanizing agent inlet corresponding to the vulcanizing agent inlet 2 is provided on the fixed feed plate 2 Inlet three, a desiccant inlet three corresponding to the desiccant inlet two, the bottom of the vulcanizing agent inlet three is connected to the vulcanizing agent feed port, and the desiccant inlet three is connected to the desiccant inlet; the desulfurizing agent storage tank includes a tank body one, and the bottom of the tank body one is provided with an outlet port one penetrating the fixed feed plate one and corresponding to the vulcanizing agent inlet two; the desiccant storage tank includes a tank body two, and the bottom of the tank body two is provided with an outlet port two penetrating the fixed feed plate and corresponding to the desiccant inlet two; the discharge assembly includes a fixed discharge plate one coaxially stacked and arranged in an annular shape, a rotary discharge The first fixed discharge plate is provided with a desiccant outlet 1 connected to the desiccant discharge port, the first fixed discharge plate is also provided with a vulcanizing agent outlet 1 connected to the purification box, the rotating discharge plate is provided with a desiccant outlet 2 corresponding to the desiccant outlet 1 and a vulcanizing agent outlet 2 corresponding to the vulcanizing agent outlet 1, the second fixed discharge plate is provided with a desiccant outlet 3 corresponding to the desiccant outlet 2 and a vulcanizing agent outlet 3 corresponding to the vulcanizing agent outlet 2; a rotating rod is provided on the purification box and rotates, and the rotating rod passes through the first fixed feed plate and the rotating feed plate , fixed feed plate two and is coaxial with the three, the rotating rod is rotatably connected with the fixed feed plate one and the fixed feed plate two, the rotating rod is fixedly connected with the rotating feed plate, the fixed feed plate one is fixedly connected with the tank body one and the tank body two through the support rod one, and the fixed feed plate two is fixedly connected with the purification box through the support rod two; the rotating rod passes through the fixed discharge plate one, the rotating discharge plate and the fixed discharge plate two and is coaxial with the three, the rotating rod is rotatably connected with the fixed discharge plate one and the fixed discharge plate two, and the rotating rod is fixedly connected with the rotating discharge plate; the fixed discharge plate one is fixedly connected with the purification box through the support rod three, and the fixed discharge plate two is fixedly connected with the collection box through the support rod four.

[0008] Based on the above, the collecting box is divided into a desiccant collection area and a desulfurizer collection area by partitions. A desiccant receiving port for connecting to the desiccant outlet three times is provided at the top of the collecting box corresponding to the desiccant collection area. A desulfurizer receiving port for connecting to the desulfurizer outlet three times is provided at the top of the collecting box corresponding to the desulfurizer collection area.

[0009] Based on the above, the air distribution assembly includes an annular air distribution shell, the air distribution shell is provided with an air inlet hole connected to the air delivery pipe, and the bottom of the air distribution shell is provided with a plurality of air outlet holes.

[0010] Based on the above, a plurality of stirring rods are further provided on the rotating rod in the purification box.

[0011] Based on the above, the first discharge port is provided with a gate plate 1; the second discharge port is provided with a gate plate 2.

[0012] Based on the above, the desulfurizer storage tank is used to store granular iron oxide particles; the desiccant storage tank is used to store granular calcium oxide particles.

[0013] Based on the above, an ultrasonic generator electrically connected to the controller is also provided in the water tank.

[0014] Based on the above, a humidity sensor electrically connected to the controller is provided on the exhaust pipe.

[0015] Based on the above, a hydrogen sulfide concentration sensor electrically connected to the controller is provided on the exhaust pipe.

[0016] The present invention has outstanding substantive features and significant progress compared to the prior art. Specifically, the present invention has the following advantages: The biogas purification equipment provided by the present invention utilizes the property of ammonia being easily soluble in water to remove ammonia in the biogas through the water in the water tank; in addition, calcium oxide particles are used to adsorb moisture in the biogas from which ammonia has been removed, and then iron oxide particles are used to remove hydrogen sulfide gas in the biogas, thereby achieving purification of the biogas; in addition, the calcium oxide particles generate heat when removing water vapor, thereby improving the reaction efficiency of the iron oxide particles and hydrogen sulfide gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.

[0019] Figure 3 It is a structural schematic diagram of some structural parts in the present invention.

[0020] Figure 4 yes Figure 3 Schematic diagram of the structure at point B in the middle.

[0021] Figure 5 yes Figure 3 Schematic diagram of the structure at point C in the middle.

[0022] Figure 6 It is a structural schematic diagram of the air distribution shell in the present invention.

[0023] In the figure: 1. Biogas tank; 2. Primary purification device; 3. Secondary purification device; 4. Water tank; 4-1. Water inlet; 4-2. Drain outlet; 4-3. Exhaust outlet; 5. Air distribution assembly; 5-1. Housing; 5-2. Air inlet; 5-3. T-tube; 5-3-1. Exhaust hole; 5-5. Air inlet; 6. Draft fan; 7. Connecting pipe; 8. Dual-axis reduction motor; 9. First bevel gear transmission structure; 10. Second bevel gear transmission structure ;11. Purification box;11-1. Air outlet;11-2. Vulcanizing agent feed port;12. V-shaped pipe;12-1. Air inlet;12-2. Desiccant inlet;12-3. Exhaust outlet;13. Exhaust pipe;14. Humidity sensor;15. Feed assembly;15-1. Fixed feed plate 1;15-2. Rotating feed plate;15-3. Fixed feed plate 2;15-4. Vulcanizing agent inlet 2;15-5. Vulcanizing agent inlet 3;15 -6. Desiccant inlet 2; 15-7. Desiccant inlet 3; 16. Desulfurizer storage tank; 16-1. Tank body 1; 16-2. Gate 1; 17. Desiccant storage tank; 17-1. Tank body 2; 17-2. Gate 2; 18. Rotating rod; 19. Stirring rod; 20. Air distribution shell; 20-1. Air inlet; 20-2. Air outlet; 21. Air pipe 2; 22. Air pipe 1; 23. Discharge assembly; 23-1. Fixed discharge plate 1; 23-2. Rotating discharge plate; 23-3. Fixed discharge plate 2; 23-4. Vulcanizing agent outlet 1; 23-5. Desiccant outlet 1; 23-6. Vulcanizing agent outlet 2; 23-7. Desiccant outlet 2; 23-8. Vulcanizing agent outlet 3; 23-9. Desiccant outlet 3; 24. Collecting box; 24-1. Partition; 24-2. Vulcanizing agent receiving port; 24-3. Desiccant receiving port; 25. Mounting bracket; 26. Controller. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below through specific implementation methods. Example

[0025] like Figure 1-6As shown, the present invention provides a biogas purification device, comprising a biogas tank 1, a primary purification device 2, and a secondary purification device 3 that are arranged in coordination; the primary purification device 2 comprises a water tank 4, the top of the water tank 4 is provided with a water inlet 4-1, the upper side wall of the water tank 4 is provided with an exhaust port 4-3, the bottom of the water tank 4 is provided with a drain port 4-2, and the water tank 4 is also provided with an air distribution component 5, the air distribution component 5 comprises a shell 5-1 arranged on the top of the water tank 4, a T-shaped tube 5-3 extending into the water tank 4 is penetrated and rotatably provided on the shell 5-1, an air inlet 5-2 is also provided on the shell 5-1, a plurality of air inlet holes 5-5 are provided on the T-shaped tube 5-3 located in the shell 5-1, a plurality of exhaust holes 5-3-1 are provided at the bottom of the T-shaped tube 5-3, and a double-shaft reduction motor 8 is also fixedly provided above the water tank 4, one of the power output ends of the double-shaft reduction motor 8 is connected to the water tank 4 through a first bevel gear transmission structure 9. Drive the T-tube 5-3 to rotate; an induced draft fan 6 is provided on the outside of the biogas tank 1, the inlet of the induced draft fan 6 extends into the biogas tank 1, and the outlet of the induced draft fan 6 is connected to the air inlet 5-2 through a connecting pipe 7; the secondary purification device 3 includes a desulfurizer storage tank 16 and a desiccant storage tank 17 fixedly mounted on the mounting frame 25, and the desulfurizer storage tank 16 and the desiccant storage tank 17 are both arranged on the feeding assembly 15, and the secondary purification device 3 also includes a purification assembly and a discharge assembly 23 associated with the feeding assembly 15, and a collecting box 24 is provided below the discharge assembly 23; the other power output end of the dual-axis reduction motor 8 is transmitted with the feeding assembly 15 through the second bevel gear transmission structure 10, and the exhaust port 4-3 is connected to the purification assembly through an air pipe 22; the induced draft fan 6 and the dual-axis reduction motor 8 are both electrically connected to the controller 26.

[0026] The above-mentioned purification component is used to remove water vapor and hydrogen sulfide gas in biogas, and it includes a purification box 11, the side wall of the purification box 11 is provided with an air outlet 11-1, the top of the purification box 11 is provided with a sulfiding agent feed port 11-2, the air outlet 11-1 is provided with an exhaust pipe 13, and the purification box 11 is penetrated by a V-shaped tube 12 made of copper, one end of the V-shaped tube 12 located outside the purification box 11 is a desiccant discharge port, and the other end located inside the purification box 11 is provided with an exhaust port 12-3, the V-shaped tube 12 is also provided with an air inlet 12-1 extending to the outside of the purification box 11 and a desiccant inlet 12-2, the exhaust port 12-3 is connected to the air distribution component 5 arranged in the purification box 11 through the second air supply pipe 21; the air inlet 12-1 is connected to the first air supply pipe 22; The feeding assembly 15 includes a fixed feeding plate 15-1, a rotating feeding plate 15-2, and a fixed feeding plate 15-3 which are coaxially stacked and arranged in an annular shape. The rotating feeding plate 15-2 is transmission-connected to the other power output end of the dual-axis reduction motor 8 through the second bevel gear transmission structure 10. The rotating feeding plate 15-2 is provided with a vulcanizing agent inlet 15-4 and a desiccant inlet 15-6. The fixed feeding plate 15-3 is provided with a vulcanizing agent inlet 15-5 corresponding to the vulcanizing agent inlet 15-4 and a desiccant inlet 15-7 corresponding to the desiccant inlet 15-6. The bottom of the vulcanizing agent inlet 15-5 is connected to the vulcanizing agent feeding port 11-2, and the desiccant inlet 15-7 is connected to the desiccant inlet 12-2. The desulfurizing agent storage tank 16 comprises a tank body 16-1, and a discharge port 1 is provided at the bottom of the tank body 16-1, which passes through the fixed feed plate 15-1 and corresponds to the second vulcanizing agent inlet 15-4; the desiccant storage tank comprises a tank body 17-1, and a discharge port 2 is provided at the bottom of the tank body 17-1, which passes through the fixed feed plate and corresponds to the second desiccant inlet 15-6; The discharge assembly 23 includes a fixed discharge plate 23-1, a rotating discharge plate 23-2, and a fixed discharge plate 23-3 which are coaxially stacked and arranged in an annular shape. The fixed discharge plate 23-1 is provided with a desiccant outlet 23-5 connected to the desiccant discharge port, and the fixed discharge plate 23-1 is also provided with a vulcanizing agent outlet 23-4 connected to the purification box 11. The rotating discharge plate 23-2 is provided with a desiccant outlet 23-7 corresponding to the desiccant outlet 23-5 and a vulcanizing agent outlet 23-6 corresponding to the vulcanizing agent outlet 23-4. The fixed discharge plate 23-3 is provided with a desiccant outlet 23-9 corresponding to the desiccant outlet 23-7 and a vulcanizing agent outlet 23-8 corresponding to the vulcanizing agent outlet 23-6. A rotating rod 18 is provided on the purification box 11 and is rotatable. The rotating rod 18 passes through the fixed feed plate 1 15-1, the rotating feed plate 15-2, and the fixed feed plate 2 15-3 and is coaxial with the three. The rotating rod 18 is rotatably connected with the fixed feed plate 1 15-1 and the fixed feed plate 2 15-3. The rotating rod 18 is fixedly connected with the rotating feed plate 15-2. The fixed feed plate 1 15-1 is fixedly connected with the tank body 1 16-1 and the tank body 2 17-1 through the support rod 1. The fixed feed plate 2 15-3 is fixedly connected with the purification box 11 through the support rod 2. The rotating rod 18 passes through the fixed discharge plate 1 23-1, the rotating discharge plate 23-2, and the fixed discharge plate 23-3 and is coaxial with the three. The rotating rod 18 is rotatably connected with the fixed discharge plate 1 23-1 and the fixed discharge plate 23-3, and the rotating rod 18 is fixedly connected with the rotating discharge plate 23-2; The fixed discharge plate 1 23 - 1 is fixedly connected to the purification box 11 through the support rod 3, and the fixed discharge plate 2 23 - 3 is fixedly connected to the collection box 24 through the support rod 4.

[0027] The above-mentioned collecting box 24 is used to collect used desulfurizer and desiccant. The collecting box 24 is divided into a desiccant collecting area and a desulfurizer collecting area by a partition 24-1. The top of the collecting box 24 corresponds to the desiccant collecting area and is provided with a desiccant receiving port 24-3 for connecting with the desiccant outlet three 23-9. The top of the collecting box 24 corresponds to the desulfurizer collecting area and is provided with a desulfurizer receiving port 24-2 for connecting with the desulfurizer outlet three.

[0028] The air distribution assembly 5 comprises an annular air distribution shell 20, on which an air inlet 20-1 connected to the air delivery pipe 1 22 is disposed, and a plurality of air outlets 20-2 are disposed at the bottom of the air distribution shell 20.

[0029] In order to facilitate stirring of the desulfurizer in the purification box 11 to improve the contact efficiency between the iron oxide and the biogas and to facilitate the discharge of the iron oxide from the purification box 11 , a plurality of stirring rods 19 are provided on the rotating rod 18 in the purification box 11 .

[0030] In order to adjust the discharge speed of the desulfurizer, a gate plate 16-2 is provided on the discharge port 1. In order to adjust the discharge speed of the desiccant, a gate plate 2 17-2 is provided on the discharge port 2.

[0031] The desulfurizing agent storage tank 16 is used to store granular iron oxide particles; the desiccant storage tank 17 is used to store granular calcium oxide particles.

[0032] In order to ensure that ammonia in the biogas is dissolved in water, it is necessary to prevent ammonia from overflowing in the water along with bubbles, so an ultrasonic generator electrically connected to the controller 26 is also provided in the water tank 4.

[0033] In order to monitor the moisture in the biogas discharged from the exhaust pipe 13 , a humidity sensor 14 electrically connected to the controller 26 is provided on the exhaust pipe 13 .

[0034] In order to facilitate monitoring of the concentration of hydrogen sulfide in the biogas discharged from the exhaust pipe 13 , a hydrogen sulfide concentration sensor electrically connected to the controller 26 is provided on the exhaust pipe 13 .

[0035] According to the above-mentioned biogas purification equipment, its use method includes the following steps: Step 1: First, the staff sets the alarm value of biogas humidity measured by the humidity sensor 14 and the alarm value of hydrogen sulfide concentration measured by the hydrogen sulfide concentration sensor according to experience, and sets the power of the induced draft fan 6 and the speed of the double-shaft reduction motor 8. At the same time, the feeding speed of the iron oxide particles and the calcium oxide particles is adjusted by adjusting the positions of the gate plate 1 16-2 and the gate plate 2 17-2, and then the induced draft fan 6, the double-shaft reduction motor 8 and the ultrasonic generator are started; Step 2, under the action of the induced draft fan 6, the biogas in the biogas tank 1 enters the housing 5-1 through the connecting pipe 7, and then enters the T-tube 5-3 through the air inlet 5-5, and finally the biogas is discharged into the water from the exhaust hole 5-3-1 at the bottom of the T-tube 5-3, and the ammonia in the biogas dissolves in the water to achieve primary purification of the biogas, and then the biogas is discharged from the exhaust port 4-3; Step 3, the biogas discharged from the exhaust port 4-3 enters the V-shaped tube 12 through the gas pipe 1 22, and the calcium oxide particles discharged from the bottom discharge port 2 of the tank body 17-1 are discharged into the desiccant inlet 12-2 through the desiccant inlet 2 15-6 and the desiccant inlet 3 15-7 and finally fall into the V-shaped tube 12. After the calcium oxide particles come into contact with the biogas, they absorb the water vapor therein and then produce an exothermic reaction to heat the environment inside the purification box 11. The biogas with water vapor removed is discharged from the exhaust port 12-3 and discharged into the gas distribution shell 20 through the gas pipe 21, and then discharged into the purification box 11 from the air outlet 20-2, and the calcium oxide particles that absorb water vapor enter the desiccant collection area in the collection box 24 through the desiccant outlet 1 23-5, the desiccant outlet 2 23-7, and the desiccant outlet 3 23-9; Step 4, after the biogas discharged from the gas distribution shell 20 contacts with the iron oxide particles, the hydrogen sulfide gas therein is removed by the adsorption reaction of the iron oxide particles, and then the iron oxide particles are discharged through the sulfiding agent outlet 1 23-4, the sulfiding agent outlet 23-6 and the sulfiding agent outlet 3 23-8, and enter the desulfurizing agent collection area in the collection box 24 through the sulfiding agent receiving port 24-2, and the purified biogas is discharged from the gas outlet 11-1 and transported to a specific area through the exhaust pipe 13; Step 5: When the biogas humidity value measured by the humidity sensor 14 reaches the biogas humidity alarm value, the controller 26 issues an alarm, and the staff can increase the release rate of the calcium oxide particles by adjusting the position of the second gate 17-2; Step 6: When the hydrogen sulfide concentration value measured by the hydrogen sulfide concentration sensor reaches the hydrogen sulfide concentration alarm value, the controller 26 sounds an alarm, and the staff can increase the release rate of the iron oxide particles by adjusting the position of the gate 16-2.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A biogas purification device, characterized in that: The invention comprises a biogas tank (1), a primary purification device (2), and a secondary purification device (3) which are arranged in coordination; the primary purification device (2) comprises a water tank (4); a water inlet (4-1) is provided at the top of the water tank (4); an exhaust port (4-3) is provided on the upper side wall of the water tank (4); a drainage port (4-2) is provided at the bottom of the water tank (4); an air distribution component (5) is also provided on the water tank (4); the air distribution component (5) comprises an outer shell (5-1) arranged at the top of the water tank (4); A T-shaped tube (5-3) extending into the water tank (4) is provided through and rotatably penetrates the housing (5-1), an air inlet (5-2) is provided on the housing (5-1), a plurality of air inlet holes (5-5) are provided on the T-shaped tube (5-3) located in the housing (5-1), a plurality of air exhaust holes (5-3-1) are provided at the bottom of the T-shaped tube (5-3), and a dual-axis reduction motor (8) is fixedly provided above the water tank (4), one of the power output ends of the dual-axis reduction motor (8) drives the T-shaped tube (5-3) through a first bevel gear transmission structure (9) to rotate. 5-3) rotates; an induced draft fan (6) is provided outside the biogas tank (1); the inlet of the induced draft fan (6) extends into the biogas tank (1); the outlet of the induced draft fan (6) is connected to the air inlet (5-2) via a connecting pipe (7); the secondary purification device (3) comprises a desulfurizer storage tank (16) and a desiccant storage tank (17) fixedly mounted on the mounting frame (25); the desulfurizer storage tank (16) and the desiccant storage tank (17) are both arranged on the feed assembly (15); the secondary purification device (3) comprises a desulfurizer storage tank (16) and a desiccant storage tank (17) fixedly mounted on the mounting frame (25); the desulfurizer storage tank (16) and the desiccant storage tank (17) are both arranged on the feed assembly (15); The device (3) further comprises a purification component and a discharge component (23) which are arranged in association with the feed component (15); a collection box (24) is arranged below the discharge component (23); the other power output end of the dual-axis reduction motor (8) is arranged for transmission with the feed component (15) via a second bevel gear transmission structure (10); the exhaust port (4-3) is connected to the purification component via an air supply pipe (22); the induced draft fan (6) and the dual-axis reduction motor (8) are both electrically connected to a controller (26).

2. The biogas purification equipment according to claim 1, characterized in that: The purification component comprises a purification box (11), a side wall of the purification box (11) is provided with an air outlet (11-1), a top of the purification box (11) is provided with a vulcanizing agent feed port (11-2), an exhaust pipe (13) is provided at the air outlet (11-1), a V-shaped tube (12) made of copper is passed through the purification box (11), one end of the V-shaped tube (12) located outside the purification box (11) is a desiccant discharge port, and one end located inside the purification box (11) is provided with an exhaust port (12-3), the V-shaped tube (12) is also provided with an air inlet (12-1) extending outside the purification box (11) and a desiccant inlet (12-2), the exhaust port (12-3) is connected to an air distribution component (5) arranged in the purification box (11) through an air supply pipe 2 (21); the air inlet (12-1) is connected to the air supply pipe 1 (22); The feed assembly (15) comprises a fixed feed plate 1 (15-1), a rotating feed plate (15-2), and a fixed feed plate 2 (15-3) which are coaxially stacked and arranged in an annular shape. The rotating feed plate (15-2) is transmission-connected to the other power output end of the dual-axis reduction motor (8) via the second bevel gear transmission structure (10). The rotating feed plate (15-2) is provided with a vulcanizing agent inlet 2 (15-4) and a desiccant inlet 2 (15-6). The fixed feed plate 2 (15-3) is provided with a vulcanizing agent inlet 3 (15-5) corresponding to the vulcanizing agent inlet 2 (15-4) and a desiccant inlet 3 (15-7) corresponding to the desiccant inlet 2 (15-6). The bottom of the vulcanizing agent inlet 3 (15-5) is connected to the vulcanizing agent feed port (11-2), and the desiccant inlet 3 (15-7) is connected to the desiccant inlet (12-2). The desulfurizing agent storage tank (16) comprises a tank body 1 (16-1), the bottom of the tank body 1 (16-1) is provided with a discharge port 1 penetrating the fixed feed plate 1 (15-1) and corresponding to the vulcanizing agent inlet 2 (15-4); the desiccant storage tank comprises a tank body 2 (17-1), the bottom of the tank body 2 (17-1) is provided with a discharge port 2 penetrating the fixed feed plate and corresponding to the desiccant inlet 2 (15-6); The discharge assembly (23) comprises a fixed discharge plate 1 (23-1), a rotating discharge plate (23-2), and a fixed discharge plate 2 (23-3) which are coaxially stacked and arranged in an annular shape. The fixed discharge plate 1 (23-1) is provided with a desiccant outlet 1 (23-5) connected to the desiccant discharge port. The fixed discharge plate 1 (23-1) is also provided with a vulcanizing agent outlet 1 (23-4) connected to the purification box (11). The rotating discharge plate (23-2) is provided with a desiccant outlet 2 (23-7) corresponding to the desiccant outlet 1 (23-5) and a vulcanizing agent outlet 2 (23-6) corresponding to the vulcanizing agent outlet 1 (23-4). The fixed discharge plate 2 (23-3) is provided with a desiccant outlet 3 (23-9) corresponding to the desiccant outlet 2 (23-7) and a vulcanizing agent outlet 3 (23-8) corresponding to the vulcanizing agent outlet 2 (23-6). A rotating rod (18) is provided on the purification box (11) so as to penetrate and rotate. The rotating rod (18) penetrates the fixed feed plate 1 (15-1), the rotating feed plate (15-2) and the fixed feed plate 2 (15-3) and is coaxial with the three. The rotating rod (18) is rotatably connected to the fixed feed plate 1 (15-1) and the fixed feed plate 2 (15-3). The rotating rod (18) is fixedly connected to the rotating feed plate (15-2). The fixed feed plate 1 (15-1) is fixedly connected to the tank body 1 (16-1) and the tank body 2 (17-1) via a support rod 1. The fixed feed plate 2 (15-3) is fixedly connected to the purification box (11) via a support rod 2. The rotating rod (18) passes through the fixed discharge plate 1 (23-1), the rotating discharge plate (23-2), and the fixed discharge plate 2 (23-3) and is coaxial with the three. The rotating rod (18) is rotatably connected to the fixed discharge plate 1 (23-1) and the fixed discharge plate 2 (23-3), and the rotating rod (18) is fixedly connected to the rotating discharge plate (23-2); The fixed discharge plate 1 (23-1) is fixedly connected to the purification box (11) via the support rod 3, and the fixed discharge plate 2 (23-3) is fixedly connected to the collection box (24) via the support rod 4.

3. The biogas purification equipment according to claim 2, characterized in that: The collecting box (24) is divided into a desiccant collecting area and a desulfurizing agent collecting area by a partition (24-1). A desiccant receiving port (24-3) for connecting to the desiccant outlet three (23-9) is provided at the top of the collecting box (24) corresponding to the desiccant collecting area. A desulfurizing agent receiving port (24-2) for connecting to the desulfurizing agent outlet three is provided at the top of the collecting box (24) corresponding to the desulfurizing agent collecting area.

4. The biogas purification equipment according to claim 2, characterized in that: The air distribution assembly (5) comprises an annular air distribution shell (20), the air distribution shell (20) being provided with an air inlet (20-1) connected to the air delivery pipe 1 (22), and the bottom of the air distribution shell (20) being provided with a plurality of air outlets (20-2).

5. The biogas purification equipment according to claim 2, characterized in that: A plurality of stirring rods (19) are also provided on the rotating rod (18) located in the purification box (11).

6. The biogas purification equipment according to claim 2, characterized in that: The first discharge port is provided with a gate plate 1 (16-2); the second discharge port is provided with a gate plate 2 (17-2).

7. The biogas purification equipment according to claim 5, characterized in that: The desulfurizing agent storage tank (16) is used to store granular iron oxide particles; and the desiccant storage tank (17) is used to store granular calcium oxide particles.

8. The biogas purification equipment according to claim 1, characterized in that: An ultrasonic generator electrically connected to the controller (26) is also provided in the water tank (4).

9. The biogas purification equipment according to claim 1, characterized in that: The exhaust pipe (13) is provided with a humidity sensor (14) which is electrically connected to the controller (26).

10. The biogas purification equipment according to claim 1, characterized in that: The exhaust pipe (13) is provided with a hydrogen sulfide concentration sensor which is electrically connected to the controller (26).

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