Filtering device for biogas purification
By dynamically adjusting the position of the filter screen using a combination of a servo motor and an electromagnetic clutch, and combining this with a pressure relief device, the problem of filter screen aperture in traditional biogas purification devices is solved, achieving efficient biogas purification and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-17
AI Technical Summary
In traditional biogas purification filtration devices, a single filtration method may result in filter meshes that are too large or too small, leading to incomplete removal of impurities or slow filtration speed, easy clogging, reduced filtration efficiency, and increased maintenance costs.
The system employs a combination of a servo motor, an electromagnetic clutch, and a connecting pipe to adjust and replace the filter screen. Combined with a pressure relief device, it maintains stable internal pressure to ensure effective filtration.
By dynamically adjusting the position of the filter and replacing it in a timely manner, the problem of filter clogging is solved, the filtration effect and service life are improved, and maintenance costs are reduced.
Smart Images
Figure CN223995664U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of biogas purification technology, specifically a filtration device for biogas purification. Background Technology
[0002] Biogas extraction involves removing impurities from biogas to produce high-quality CH4 with high methane content and calorific value and impurity gas composition that meet natural gas standards.
[0003] In traditional biogas extraction and filtration devices, workers connect the inlet of the device to unfiltered biogas and the outlet to subsequent processing equipment. The unprocessed biogas is then filtered through the biogas extraction and filtration device to improve its purity.
[0004] However, in the actual use of biogas extraction and storage filtration devices, a single filtration method may result in incomplete removal of impurities due to excessively large filter screen pores, or slow filtration speed and easy clogging due to excessively small pores. These situations may reduce the filtration effect of the biogas extraction and storage filtration device and may also reduce the service life of the filter screen, thereby increasing maintenance costs. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a filtration device for biogas purification. It solves the problem that in the actual use of biogas extraction and storage filtration devices, a single filtration method may result in incomplete removal of impurities due to excessively large filter screen pores, or slow filtration speed and easy clogging due to excessively small pores. These situations may reduce the filtration effect of the biogas extraction and storage filtration device and may also reduce the service life of the filter screen, thereby increasing maintenance costs.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a biogas purification filtration device, comprising a tank, an air inlet on the side wall of the tank, an air outlet on the lower side of the outer wall of the tank away from the air inlet, a support foot fixedly connected to the bottom of the tank, a partition plate fixedly connected to the inner wall of the tank, a filter screen disposed inside the partition plate, the biogas purification filtration device further comprising an adjustment device disposed at the top of the tank; a replacement device disposed on the side of the filter screen; and a pressure relief device disposed on the upper side of the outer wall of the tank near the air outlet; wherein, the position of the filter screen is adjusted by the adjustment device, the filter screen is replaced by the replacement device, and the pressure relief device ensures stable pressure inside the tank.
[0007] Preferably, a mounting base is rotatably connected to the top of the inner wall of the tank via a sealed connection. The adjustment device includes a servo motor, which is fixedly connected to the top of the tank. A drive shaft is fixedly connected to the output end of the servo motor and inserted into the inner wall of the mounting base. A first electromagnetic clutch is fixedly connected to the outer wall of the drive shaft. A first connecting pipe is fixedly connected to the outer wall of the first electromagnetic clutch and to the inner wall of the mounting base, extending into the interior of the tank. A second electromagnetic clutch is fixedly connected to the outer wall of the drive shaft and located below the first electromagnetic clutch. A second connecting pipe is fixedly connected to the outer wall of the second electromagnetic clutch and rotatably connected to the inner wall of the first connecting pipe via a sealed bearing, extending into the interior of the tank. A third electromagnetic clutch is fixedly connected to the outer wall of the drive shaft and located below the second electromagnetic clutch. A third connecting pipe is fixedly connected to the outer wall of the third electromagnetic clutch and rotatably connected to the inner wall of the second connecting pipe via a sealed bearing, penetrating the bottom of the tank. The servo motor drives the drive shaft to rotate, and the position of the filter screen is adjusted by the cooperation of the first electromagnetic clutch, the first connecting pipe, the second electromagnetic clutch, the second connecting pipe, the third electromagnetic clutch, and the third connecting pipe.
[0008] Preferably, three partition plates are provided. The inner walls of the three partition plates are rotatably connected to the outer walls of the first connecting pipe, the second connecting pipe, and the third connecting pipe from top to bottom via sealed bearings. Each of the three partition plates has a flow hole penetrating the top and bottom of the partition plate on the side of its outer wall near the air inlet. Each of the three flow holes has a limiting groove on its inner wall. Each of the three partition plates has a vent plate on the side away from the filter screen. One side of the outer wall of each of the three vent plates is fixedly connected to the outer wall of the first connecting pipe, the second connecting pipe, and the third connecting pipe from top to bottom. Each of the three vent plates has a vent hole on its surface. Each of the three vent plates has a scraper fixedly connected to its outer wall. The outer walls of the three scrapers are all in contact with the inner wall of the partition plate.
[0009] Preferably, the replacement device comprises three sets, including three fixing rings, each fixedly connected to the outer wall of one of the three filter screens; three sets of limiting blocks, each set containing four, fixedly connected to the upper and lower sides of the outer wall of the fixing ring; three sets of limiting rods, each set containing two, inserted into the grooves on the outer wall of the fixing ring; three sets of springs, each set containing two, fixedly connected to the end of the limiting rod away from the fixing ring; and three limiting seats, sleeved on the outer wall of the fixing ring, with their internal grooves fixedly connected to the end of the spring away from the limiting rod, and their outer walls fixedly connected from top to bottom to the outer walls of the first connecting pipe, the second connecting pipe, and the third connecting pipe, respectively. The filter screens are replaced through the cooperation of the fixing rings, limiting blocks, limiting rods, springs, and limiting seats.
[0010] Preferably, the pressure relief device includes a pressure relief port, which is located on the upper side of the outer wall of the tank near the outlet; a pressure relief valve is fixedly connected to the outer wall of the pressure relief port on the side away from the tank; two pressure sensors are provided, both of which are fixedly connected to the top of the inner wall of the tank; wherein, through the cooperation of the pressure relief port, the pressure relief valve and the pressure sensors, the internal pressure of the tank is ensured to remain stable.
[0011] Preferably, a fixed seat is rotatably connected to the lower outer wall of the third connecting pipe via a sealed bearing, and the bottom of the fixed seat is fixedly connected to the bottom of the inner wall of the tank.
[0012] Beneficial effects
[0013] This utility model provides a filtration device for biogas purification. It has the following advantages: This biogas purification filtration device, through the cooperation of a servo motor, drive shaft, first electromagnetic clutch, first connecting pipe, second electromagnetic clutch, second connecting pipe, third electromagnetic clutch, and third connecting pipe, enables timely adjustment of the positions of multiple filter screens according to actual needs. This solves the problem that in the actual use of biogas purification filtration devices, a single filtration method may result in incomplete impurity removal due to excessively large filter screen pores, or slow filtration speed and easy clogging due to excessively small pores. These situations may reduce the filtration effect of the biogas purification filtration device and also reduce the service life of the filter screens, thereby increasing maintenance costs.
[0014] By using a combination of a fixed ring, a limiting block, a limiting rod, a spring, and a limiting seat, the old filter screen can be replaced in a timely manner, ensuring the filtration effect. This solves the problem that after long-term use, impurities in the biogas may adhere to the surface of the filter screen in traditional biogas extraction and storage filtration devices, which may cause the filter screen to become clogged and thus affect the filtration effect of the biogas extraction and storage filtration device. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the appearance of the present utility model;
[0017] Figure 3 for Figure 1 A schematic diagram of the structure of the middle filter screen, the retaining ring, and the limiting block;
[0018] Figure 4 for Figure 1 A schematic diagram of the structure of the intermediate partition, flow hole, and limiting groove;
[0019] Figure 5 for Figure 1 A schematic diagram of the structure of the servo motor, drive shaft and first electromagnetic clutch;
[0020] Figure 6 for Figure 1 A schematic diagram of the structure of the middle limit rod, spring and limit seat.
[0021] In the diagram: 1. Tank body; 11. Air inlet; 12. Air outlet; 13. Mounting base; 14. Support foot; 2. Partition plate; 21. Filter screen; 22. Flow hole; 221. Limiting groove; 3. Ventilation plate; 31. Ventilation hole; 32. Scraper; 4. Adjusting device; 41. Servo motor; 42. Drive shaft; 43. First electromagnetic clutch; 44. First connecting pipe; 45. Second electromagnetic clutch; 46. Second connecting pipe; 47. Third electromagnetic clutch; 48. Third connecting pipe; 481. Fixed base; 5. Replacement device; 51. Fixed ring; 52. Limiting block; 53. Limiting rod; 54. Spring; 55. Limiting seat; 6. Pressure relief device; 61. Pressure relief port; 62. Pressure relief valve; 63. Pressure sensor. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] In the actual use of biogas extraction and storage filtration devices, a single filtration method may result in incomplete removal of impurities due to excessively large filter screen pores, or slow filtration speed and easy clogging due to excessively small pores. These situations may reduce the filtration effect of the biogas extraction and storage filtration device and may also reduce the service life of the filter screen, thereby increasing maintenance costs.
[0024] In view of this, the present invention provides a filtration device for biogas purification, which solves the problem that in the actual use of biogas extraction and storage filtration devices, a single filtration method may result in incomplete removal of impurities due to excessively large filter screen pore size, or slow filtration speed and easy clogging due to excessively small pore size. The above situations may reduce the filtration effect of the biogas extraction and storage filtration device and may also reduce the service life of the filter screen, thereby increasing maintenance costs.
[0025] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.
[0026] Example 1: By Figure 1-6It is known that a biogas purification filtration device includes a tank 1, an air inlet 11 on the side wall of the tank 1, an air outlet 12 on the lower side of the outer wall of the tank 1 away from the air inlet 11, a support foot 14 fixedly connected to the bottom of the tank 1, a partition plate 2 fixedly connected to the inner wall of the tank 1, and a filter screen 21 disposed inside the partition plate 2. The biogas purification filtration device also includes an adjusting device 4, a replacement device 5, and a pressure relief device 6. The adjusting device 4 is disposed at the top of the tank 1; the replacement device 5 is disposed on the side of the filter screen 21; and the pressure relief device 6 is disposed on the upper side of the outer wall of the tank 1 near the air outlet 12. The position of the filter screen 21 is adjusted by the adjusting device 4, the filter screen 21 is replaced by the replacement device 5, and the pressure relief device 6 ensures the stability of the internal pressure of the tank 1.
[0027] In the specific implementation process, it is worth noting that the tank body 1 is composed of three parts: a top cover, a bottom cover, and an intermediate connecting ring. The top and bottom covers are both bolted to the top and bottom of the connecting ring, facilitating work when cleaning the inner wall of the tank body 1 or replacing internal parts. The material for these covers can be stainless steel. The interfaces of the air inlet 11 and air outlet 12 can use standard flange connections for easy connection to external pipelines. The materials for both can be the same as those for the tank body 1. Four support legs 14 are provided, welded from channel steel, providing overall support for the tank body 1. The partition plate 2 has an overall annular plate shape. The interior is hollow, allowing other items to be placed inside. The partition plate 2 can be made of polypropylene plastic sheet, which has good corrosion resistance and insulation. There are three filters 21, and the three filters 21 have different filtration effects. The material of the filters 21 can be stainless steel wire mesh, and the specific mesh size can be determined according to the filtration requirements. When it is necessary to change the position of the filters 21, the operator can adjust the position of multiple filters 21 through the adjustment device 4. When it is necessary to replace the filters 21, the replacement device 5 can be used to replace the filters 21. When the internal pressure of the tank 1 is too high, the pressure relief device 6 can be used to ensure the stability of the internal pressure of the tank 1.
[0028] Furthermore, a mounting base 13 is rotatably connected to the top of the inner wall of the tank 1 via a sealed connection. The adjusting device 4 includes a servo motor 41, a drive shaft 42, a first electromagnetic clutch 43, a first connecting pipe 44, a second electromagnetic clutch 45, a second connecting pipe 46, a third electromagnetic clutch 47, and a third connecting pipe 48. The servo motor 41 is fixedly connected to the top of the tank 1; the drive shaft 42 is fixedly connected to the output end of the servo motor 41 and inserted into the inner wall of the mounting base 13; the first electromagnetic clutch 43 is fixedly connected to the outer wall of the drive shaft 42; the first connecting pipe 44 is fixedly connected to the outer wall of the first electromagnetic clutch 43 and is also fixedly connected to the inner wall of the mounting base 13, extending into the interior of the tank 1; the second electromagnetic clutch 45 is fixedly connected to the outer wall of the drive shaft 42 and is located at the first electromagnetic clutch 46. Below the clutch 43; the second connecting pipe 46 is fixedly connected to the outer wall of the second electromagnetic clutch 45, and rotatably connected to the inner wall of the first connecting pipe 44 through a sealed bearing, and extends into the interior of the tank 1; the third electromagnetic clutch 47 is fixedly connected to the outer wall of the drive shaft 42, and is located below the second electromagnetic clutch 45; the third connecting pipe 48 is fixedly connected to the outer wall of the third electromagnetic clutch 47, and rotatably connected to the inner wall of the second connecting pipe 46 through a sealed bearing, and penetrates the bottom of the tank 1; wherein, the drive shaft 42 is rotated by the servo motor 41, and the position of the filter screen 21 is adjusted by the cooperation of the first electromagnetic clutch 43, the first connecting pipe 44, the second electromagnetic clutch 45, the second connecting pipe 46, the third electromagnetic clutch 47 and the third connecting pipe 48;
[0029] In the specific implementation process, it is worth noting that the mounting base 13 is an integral circular ring, installed in the circular through hole at the top of the tank 1 via a sealed bearing. Threaded holes are provided on both sides of its outer wall. The material can be stainless steel. A sealing ring is provided between the mounting base 13 and the first connecting pipe 44 to prevent biogas leakage. The first servo motor 41 is fixed to the top of the tank 1 via a motor mount, which is secured with bolts. The motor mount can be removed when needed. The model of the first servo motor 41 can be 1FT7084-5AF71-1DG0. The external controller used in conjunction with it can be a SINAMICS-S120 series servo controller. The connection method is: connect the PM240-2 power supply... The power module is connected to a three-phase AC power supply, and the output terminal of the power module is connected to the power terminal of the 1FK7032-5AF71-1SG0 motor. Then, the CU320-2 control unit and the PM240-2 power module are connected using PROFIBUS, PROFINE, or other communication cables. Next, the encoder feedback signal of the motor is connected to the CU320-2 control unit via the corresponding encoder cable. Finally, the enable signal output terminal of the control unit is connected to the input terminal of the power module. The drive shaft 42 is made of reinforced special steel and has undergone heat treatment to improve its strength and toughness. The first electromagnetic clutch 43 is model DLD-06 and generally consists of an electromagnetic coil, armature, friction plates, hub, and spline. The clutch consists of several parts, and its working principle is as follows: When a direct current is applied to the electromagnetic coil of the first electromagnetic clutch 43, a magnetic field is generated around the coil. This magnetic field magnetizes the armature, thereby generating an electromagnetic attraction. Under the action of the electromagnetic attraction, the armature overcomes the elastic force of the return spring, moves towards the driving part, and fits tightly. As the armature fits with the driving part, friction is generated between the friction plates. This friction transmits the torque of the driving part to the driven part, thereby realizing the transmission of power and putting the clutch in the engaged state. That is, the first electromagnetic clutch 43 drives the first connecting pipe 44 to rotate with the transmission shaft 42. When the current to the electromagnetic coil is cut off, the magnetic field disappears, and the electromagnetic attraction also disappears. At this time, the armature returns to its original position under the action of the return spring. The position of the clutch is separated from the driving part. As the armature separates from the driving part, the friction between the friction plates disappears, and the torque of the driving part can no longer be transmitted to the driven part. The clutch is in a disengaged state, and power transmission is interrupted. That is, the first connecting pipe 44 stops rotating with the drive shaft 42. The second electromagnetic clutch 45 and the third electromagnetic clutch 47 are selected in the same model as the first electromagnetic clutch 43. The first connecting pipe 44, the second connecting pipe 46, and the third connecting pipe 48 are all made of stainless steel. However, their diameters and lengths are different. The first connecting pipe 44 has the largest diameter and the shortest length, the third connecting pipe 48 has the smallest diameter and the longest length, and the diameter and length of the second connecting pipe 46 are in between.The second connecting pipe 46 and the third connecting pipe 48 have heat dissipation holes on their side walls, and the internal space of the third connecting pipe 48 is connected to the outside. A dustproof net is installed at its bottom to ensure the heat dissipation effect of the first electromagnetic clutch 43, the second electromagnetic clutch 45, and the third electromagnetic clutch 47. The operator controls the servo motor 41 to drive the transmission shaft 42 to rotate, and through the coordination of the first electromagnetic clutch 43, the first connecting pipe 44, the second electromagnetic clutch 45, the second connecting pipe 46, the third electromagnetic clutch 47, and the third connecting pipe 48, adjusts the position of the three filter screens 21 according to the actual biogas flow rate, thereby filtering the biogas and expanding the applicability of the biogas purification filtration device.
[0030] Furthermore, three partition plates 2 are provided. The inner walls of the three partition plates 2 are rotatably connected to the outer walls of the first connecting pipe 44, the second connecting pipe 46, and the third connecting pipe 48 from top to bottom via sealed bearings. The outer walls of the three partition plates 2 are provided with flow holes 22 that penetrate the top and bottom of the partition plates 2 on the side near the air inlet 11. The inner walls of the three flow holes 22 are provided with limiting grooves 221. The inner walls of the three partition plates 2 are provided with ventilation plates 3 on the side away from the filter screen 21. The outer walls of the three ventilation plates 3 are fixedly connected to the outer walls of the first connecting pipe 44, the second connecting pipe 46, and the third connecting pipe 48 from top to bottom. The surfaces of the three ventilation plates 3 are provided with ventilation holes 31. The outer walls of the three ventilation plates 3 are fixedly connected with scrapers 32. The outer walls of the three scrapers 32 are all in contact with the inner walls of the partition plates 2.
[0031] In the specific implementation process, it is worth noting that each partition plate 2 has a flow hole 22, and the three flow holes 22 are arranged vertically. Biogas enters the next layer through the flow holes 22 and finally leaves the interior of the tank 1 through the gas outlet 12. A limiting groove 221 is set at the top and bottom of the flow hole 22, and the limiting groove 221 limits the internal filter screen 21 to prevent the filter screen 21 from falling off due to the installation structure when the gas pressure is too high. The ventilation plate 3 is set on the other side of the filter screen 21. The ventilation holes 31 on the ventilation plate 3 facilitate the flow of biogas. Scrapers 32 are fixed on the top, bottom and the outer wall near the inner wall of the tank 1 of the ventilation plate 3. The scrapers 32 are 'C' shaped to prevent impurities carried in the biogas from adhering to the inner wall of the partition plate 2 during use, which would affect the adjustment of the position of the filter screen 21 and the ventilation plate 3. Through the cooperation of the above components, the operational stability of the biogas purification filtration device is improved.
[0032] Specifically, when the biogas purification filtration device is needed, the operator connects the air inlet 11 to an external air intake device and the air outlet 12 to an external air outlet device. Through an external controller, the external power supply to the servo motor 41 is connected, starting the servo motor 41. The servo motor 41 drives the drive shaft 42 to rotate. Simultaneously, the external power supply to the first electromagnetic clutch 43 is connected, causing the first electromagnetic clutch 43 to actuate. The drive shaft 42, through the first electromagnetic clutch 43, drives the first connecting pipe 44 to rotate. The first connecting pipe 44 then drives the filter screen 21 inside the first layer of partition plate 2 to rotate, bringing the filter screen 21 directly below the flow hole 22. The servo motor 41 and the first electromagnetic clutch 43 are then stopped. The external valve is activated, allowing biogas to enter the tank 1. The biogas passes through filter screen 21 for filtration. The filtered biogas then flows through outlet 12 to subsequent equipment. When the external monitoring device detects an increase in the biogas flow rate into the biogas purification filter, the operator restarts the servo motor 41 via the controller. The servo motor 41 drives the drive shaft 42 to rotate. Simultaneously, based on the signal from the external flow monitoring device, the external controller connects the external power supply to the second electromagnetic clutch 45. The second electromagnetic clutch 45 actuates, and the drive shaft 42 drives the second connecting pipe 46 to rotate via the second electromagnetic clutch 45. The second connecting pipe 46 then drives the filter screen 21 inside the second layer partition plate 2 to rotate. The servo motor 41 is turned so that the filter screen 21 is directly below the flow hole 22, and the second electromagnetic clutch 45 is stopped. At this time, the biogas entering the tank 1 needs to pass through two layers of filter screen 21. The filtered biogas flows to the subsequent equipment through the gas outlet 12. When the external monitoring device detects that the biogas flow rate entering the biogas purification filter is still increasing, the servo motor 41 can be restarted. The servo motor 41 drives the drive shaft 42 to rotate and connects the external power supply of the third electromagnetic clutch 47. The third electromagnetic clutch 47 is activated, and the drive shaft 42 drives the third connecting pipe 48 to rotate through the third electromagnetic clutch 47. The third connecting pipe 48 drives the filter screen inside the third layer of partition plate 2. Rotate 21 so that filter screen 21 is directly below the flow hole 22, stop servo motor 41 and third electromagnetic clutch 47. At this time, biogas entering the tank 1 needs to pass through three layers of filter screen 21. The filtered biogas flows to the subsequent equipment through the gas outlet 12. Through the filtration of three filter screens 21, it is effectively prevented that as the flow rate increases, the flow velocity of biogas in filter screen 21 will increase and the contact time between particles and filter media will be shortened, so that some particles cannot be intercepted in time and pass through filter screen 21, resulting in an increase in the particle content in the filtered biogas and affecting the purification quality of biogas. When the biogas flow rate decreases, retain the necessary filter screens 21 and return the rest of the filter screens 21 to their original positions.
[0033] Example 2: From Figure 1-6It can be seen that the replacement device 5 is provided in three sets. The replacement device 5 includes a fixing ring 51, a limiting block 52, a limiting rod 53, a spring 54, and a limiting seat 55. There are three fixing rings 51, which are fixedly connected to the outer walls of the three filter screens 21 respectively. There are three sets of limiting blocks 52, with four in each set, which are fixedly connected to the upper and lower sides of the outer wall of the fixing ring 51 respectively. There are three sets of limiting rods 53, with two in each set, which are inserted into the grooves on the outer wall of the fixing ring 51 respectively. There are three sets of springs 54, with one set of two in each set. Two limit blocks 52 and two limit rods 53 are fixedly connected to the end of the limit rod 53 away from the fixed ring 51. Three limit seats 55 are provided, which are sleeved on the outer wall of the fixed ring 51. The inner groove is fixedly connected to the end of the spring 54 away from the limit rod 53, and the outer walls are fixedly connected to the outer walls of the first connecting pipe 44, the second connecting pipe 46 and the third connecting pipe 48 from top to bottom. The filter screen 21 is replaced by the cooperation of the fixed ring 51, the limit block 52, the limit rod 53, the spring 54 and the limit seat 55.
[0034] In the specific implementation process, it is worth noting that the fixing ring 51 is circular in shape and fixedly connected to the outer wall of the filter screen 21, forming a whole with the filter screen 21. Its material can be stainless steel. Four hemispherical grooves are provided on the outer wall, located on both sides and the front and back of the outer wall. Limiting blocks 52 are fixedly connected above and below the grooves in the front and back directions. The top and side walls of the limiting blocks 52 have through holes to assist workers in installing or removing the filter screen 21. The limiting blocks 52 are made of the same material as the fixing ring 51. The limiting blocks 52 cooperate with the limiting grooves 221 to prevent the filter screen 21 from falling out of the partition plate 2. The rod 53 is made of the same material as the fixing ring 51. The side of the limiting rod 53 near the fixing ring 51 is machined into a hemispherical shape, which can be used to cooperate with the groove on the outer wall of the fixing ring 51 to fix the fixing ring 51. The spring 54 is made of 65Mn spring steel, which has good elasticity and fatigue performance. Its stiffness is selected according to actual needs. The limiting seat 55 is in the shape of a ring, and grooves are provided on both sides of the inner wall to fix the spring 54. Through the cooperation of the fixing ring 51, limiting block 52, limiting rod 53, spring 54 and limiting seat 55, the filter screen 21 is more convenient to replace, and the ease of use of the biogas purification filter device is improved.
[0035] Furthermore, the pressure relief device 6 includes a pressure relief port 61, a pressure relief valve 62, and a pressure sensor 63. The pressure relief port 61 is located on the upper side of the outer wall of the tank 1 near the air outlet 12. The pressure relief valve 62 is fixedly connected to the outer wall of the pressure relief port 61 on the side away from the tank 1. Two pressure sensors 63 are provided, both of which are fixedly connected to the top of the inner wall of the tank 1. Through the cooperation of the pressure relief port 61, the pressure relief valve 62, and the pressure sensor 63, the internal pressure of the tank 1 is ensured to remain stable.
[0036] In the specific implementation process, it is worth noting that the pressure relief port 61 is located above the gas outlet 12 and its material is the same as that of the tank body 1. The pressure relief valve 62 can be a pilot-operated pressure relief valve, such as Y13H-16C, and the pressure sensor 63 can be a diffused silicon pressure sensor, such as PT124G-111. Through the cooperation of the pressure relief port 61, the pressure relief valve 62 and the pressure sensor 63, the staff can monitor the internal pressure of the tank body 1 at any time to ensure its internal pressure stability, thereby improving the safety of the biogas purification filtration device.
[0037] Furthermore, a fixed seat 481 is rotatably connected to the lower outer wall of the third connecting pipe 48 via a sealed bearing, and the bottom of the fixed seat 481 is fixedly connected to the bottom of the inner wall of the tank body 1.
[0038] In the specific implementation process, it is worth noting that the fixing seat 481 is fixed to the bottom of the tank 1 by bolts, which makes it convenient for the staff to operate when it is necessary to replace the parts inside the tank 1, and further improves the ease of use of the biogas purification filter device.
[0039] Specifically, when it is necessary to replace the filter screen 21 inside the biogas purification filter device, the operator needs to move the three filter screens 21 directly below the three flow holes 22 beforehand. Then, the operator removes the bolts on the top of the tank body 1 and the bolts on both sides of the mounting base 13. At this time, the operator can remove the top cover of the tank body 1. It is understood that if the motor base obstructs the operation during the removal of the top cover, the bolts behind the motor base can be removed to remove the motor base from the servo motor 41. Afterwards, the motor base can be installed on the outer wall of the servo motor 41. After the top cover is removed, the operator, wearing protective measures, uses a tool to press against the inner wall of the fixing ring 51, causing the fixing ring 51 to rotate. The fixing ring 51 causes the filter screen 21 to rotate, and also causes the hemispherical groove on its outer wall to rotate. The hemispherical groove gradually moves away from the limiting rod 53. The two limiting rods 53 are squeezed by the outer wall of the fixing ring 51 and move away from the fixing ring 51 respectively, compressing the springs 54 fixedly connected to their respective ends. After the spring 54 is compressed and rotated 90 degrees, the limiting block 52 on the outer wall of the fixing ring 51 is located below the limiting groove 221. At this time, the worker pulls the tool upward, and the tool drives the fixing ring 51 to move upward, thereby moving the filter screen 21 upward and leaving the interior of the partition plate 2. Then, the old filter screen 21 is removed and replaced with a new filter screen 21. The above actions are reversed to install the new filter screen 21 back, and the replacement is completed. The three filter screens 21 can be installed in sequence. When the biogas purification filter device is working normally, the pressure sensor 63 monitors the pressure inside the tank 1. When the pressure inside the tank 1 exceeds the standard pressure set by the system, the pressure sensor 63 transmits the signal to the external signal receiver. The receiver transmits the signal to the external controller, and the external controller controls the pressure relief valve 62 to open. The biogas inside the tank 1 flows to the biogas temporary storage device through the pressure relief valve 62 until the pressure sensor 63 detects that the pressure has returned to the standard pressure. Then, the external controller closes the pressure relief valve 62, and the pressure relief is completed.
[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A filter device for biogas purification, comprising a tank (1), characterized in that: The side wall of the tank body (1) is provided with an air inlet (11), the outer wall of the tank body (1) is provided with an air outlet (12) below the side away from the air inlet (11), the bottom of the tank body (1) is fixedly connected with a supporting leg (14), the inner wall of the tank body (1) is fixedly connected with a partition plate (2), the inside of the partition plate (2) is provided with a filter screen (21), and the filter device for biogas purification further comprises: An adjusting device (4) is arranged on the top of the tank body (1); A replacement device (5) is arranged on the side of the filter screen (21); A pressure relief device (6) is arranged on the outer wall of the tank body (1) above the side close to the air outlet (12); Wherein, the position of the filter screen (21) is adjusted by the adjusting device (4), and the filter screen (21) is replaced by the replacement device (5); the pressure inside the tank body (1) is stabilized by the pressure relief device (6).
2. The filter device for biogas purification according to claim 1, characterized in that: The inner wall of the tank body (1) is rotatably connected with a mounting seat (13) through sealing at the top, and the adjusting device (4) comprises: A servo motor (41) is fixedly connected to the top of the tank body (1); A transmission shaft (42) is fixedly connected to the output end of the servo motor (41) and is inserted into the inner wall of the mounting seat (13); A first electromagnetic clutch (43) is fixedly connected to the outer wall of the transmission shaft (42); A first connecting pipe (44) is fixedly connected to the outer wall of the first electromagnetic clutch (43) and is fixedly connected to the inner wall of the mounting seat (13) and extends into the inside of the tank body (1); A second electromagnetic clutch (45) is fixedly connected to the outer wall of the transmission shaft (42) and is located below the first electromagnetic clutch (43); A second connecting pipe (46) is fixedly connected to the outer wall of the second electromagnetic clutch (45) and is rotatably connected to the inner wall of the first connecting pipe (44) through a sealing bearing and extends into the inside of the tank body (1); A third electromagnetic clutch (47) is fixedly connected to the outer wall of the transmission shaft (42) and is located below the second electromagnetic clutch (45); A third connecting pipe (48) is fixedly connected to the outer wall of the third electromagnetic clutch (47) and is rotatably connected to the inner wall of the second connecting pipe (46) through a sealing bearing and penetrates the bottom of the tank body (1); Wherein, the transmission shaft (42) is rotated by the servo motor (41), and the position of the filter screen (21) is adjusted by the cooperation of the first electromagnetic clutch (43), the first connecting pipe (44), the second electromagnetic clutch (45), the second connecting pipe (46), the third electromagnetic clutch (47) and the third connecting pipe (48).
3. The filter device for biogas purification according to claim 2, characterized in that: The three inner walls of the three interval plates (2) are rotatably connected to the outer walls of the first connecting pipe (44), the second connecting pipe (46) and the third connecting pipe (48) from top to bottom through sealing bearings, respectively, and the outer wall of each of the three interval plates (2) is provided with a flow-through hole (22) penetrating through the top and the bottom of the interval plate (2) on the side close to the air inlet (11).
4. The filter device for biogas purification according to claim 2, characterized in that: The replacement device (5) is provided with three groups, and the replacement device (5) comprises: A fixed ring (51) is provided with three, and is fixedly connected to the outer wall of the three filter screens (21), respectively; A limiting block (52) is provided with three groups, each group is provided with four, and is fixedly connected to the outer wall of the fixed ring (51) on the upper and lower sides of the two sides, respectively; A limiting rod (53) is provided with three groups, one group is provided with two, and is inserted into the outer wall groove of the fixed ring (51), respectively; A spring (54) is provided with three groups, one group is provided with two, and is fixedly connected to one end of the limiting rod (53) away from the fixed ring (51), respectively; A limiting seat (55) is provided with three, and is sleeved on the outer wall of the fixed ring (51), and the inner groove is fixedly connected to one end of the spring (54) away from the limiting rod (53), and the outer wall is fixedly connected to the outer wall of the first connecting pipe (44), the second connecting pipe (46) and the third connecting pipe (48) from top to bottom, respectively; Wherein, through the cooperation of the fixed ring (51), the limiting block (52), the limiting rod (53), the spring (54) and the limiting seat (55), the filter screen (21) is replaced.
5. The filter device for biogas purification according to claim 1, characterized in that: The pressure relief device (6) comprises: A pressure relief port (61) is provided on the upper side of the outer wall of the tank body (1) close to the air outlet (12); A pressure relief valve (62) is fixedly connected to the outer wall of the pressure relief port (61) away from the tank body (1); A pressure sensor (63) is provided with two, and is fixedly connected to the inner wall top of the tank body (1); Wherein, through the cooperation of the pressure relief port (61), the pressure relief valve (62) and the pressure sensor (63), the internal pressure of the tank body (1) is ensured to be stable.
6. The filter device for biogas purification according to claim 2, characterized in that: The outer wall of the third connecting pipe (48) is rotatably connected to the fixed seat (481) through the sealing bearing below, and the bottom of the fixed seat (481) is fixedly connected to the inner wall bottom of the tank body (1).