Biogas purification device convenient to maintain

Abstract

The invention relates to the technical field of gas membrane separation, in particular to a marsh gas purification device convenient to maintain. According to the technical scheme, the marsh gas purification device comprises a shell, a separation tray and a maintenance assembly, a heat preservation layer is arranged in the shell, a safety belt is fixedly installed at the bottom of the shell, and a gas inlet pipe is fixedly installed on one side of the top of the shell. The maintenance assembly is mounted in the separation tray, the gas separation membrane can be maintained through the maintenance assembly, the mounting frame drives the scraper to rotate around the center shaft, the scraper is attached to the gas separation membrane to move, the gas separation membrane can be kept flat, and when the gas separation membrane purifies biogas, the gas separation membrane can be separated from the gas separation membrane, so that the gas separation membrane is purified. According to the gas separation membrane, the biogas separation effects at different positions are kept uniform, and the epoxy resin-based composite coating is uniformly coated on the surface of the gas separation membrane through the scraping plate, so that the gas separation membrane can be repaired in the working process, and the working performance of the gas separation membrane is further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of gas membrane separation, in particular to a biogas purification device which is easy to maintain. Background Art

[0002] Membrane separation technology is an efficient method for biogas purification. Its core lies in the use of semipermeable membranes made of specific materials to separate the components in a gas mixture under pressure. Gas membrane separation has the advantages of low energy consumption, small size and easy operation. Therefore, it is more suitable for biogas purification and separation. In order to make membrane separation technology better applied in biogas separation equipment, we propose a biogas purification device that is easy to maintain.

[0003] The prior art also has the following defects during use: 1. The biogas purification and refining device in the prior art is not easy to maintain during operation. The conventional biogas purification device using membrane separation technology needs to be shut down for later maintenance, which affects the working efficiency of the biogas purification device. Moreover, biogas is prone to combustion and explosion after mixing with oxygen. Therefore, the conventional biogas purification device has certain safety hazards when it needs maintenance. 2. In the process of purifying biogas by the biogas purification device in the prior art, since the purification of biogas by the gas separation membrane is based on the difference in permeability of gases of different components inside the separation membrane, the performance of the gas separation membrane will gradually decline during separation, and the gas separation membrane needs to be maintained regularly. When the performance of the gas separation membrane declines, its separation effect on biogas will gradually decline, making it difficult to meet the high-precision purification of biogas in industry, limiting the application of traditional biogas purification devices.

[0004] In view of this, we propose a biogas purification device that is easy to maintain to solve the existing problems. Summary of the invention

[0005] The purpose of the present invention is to provide a biogas purification device which is easy to maintain, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a biogas purification and refining device that is easy to maintain, comprising a shell, a separation tray and a maintenance component, wherein a heat preservation layer is arranged inside the shell, a safety belt is fixedly installed at the bottom of the shell, an air intake pipe is fixedly installed on one side of the top of the shell, and a one-way valve is fixedly installed at the connection position between the air intake pipe and the shell, and an exhaust pipe is fixedly installed on one side of the top of the shell away from the air intake pipe; A separation tray is movably installed inside the shell, and the separation tray is a double-layer square frame structure. Six fan-shaped through slots are opened inside the separation tray, and a gas separation membrane is fixedly installed inside the fan-shaped through slots of the separation tray. Electric telescopic rods are fixedly installed on both sides of the top of the separation tray, and the top of the electric telescopic rod is fixedly connected to the top of the shell. Six groups of guide grooves are opened inside the separation tray, and the guide grooves extend to the top of the separation tray where a filling barrel is fixedly installed; A maintenance component is fixedly installed inside the separation tray.

[0007] Preferably, the maintenance assembly includes a central axis, six groups of mounting frames are fixedly installed on the side of the central axis, four square plates are arranged in the mounting frames, four scrapers are fixedly installed inside the mounting frames, and the scrapers are of a corrugated structure, the scrapers are divided into two groups, and each group of scrapers is installed oppositely, and the scrapers are in contact with the gas separation membrane; The top and bottom of the central axis are fixedly mounted with support frames, and the support frames are fixedly mounted with spring plates on one side facing the mounting frame. The spring plates are arched in structure and are in contact with the mounting frame.

[0008] Preferably, a gas concentration detector is fixedly installed on the top of the shell near the front side, and a vacuum pump is fixedly installed on the top of the shell near the rear side, a vacuum pipe is fixedly installed on the side of the vacuum pump, and the vacuum pipe extends to the interior of the shell, and a main control box is fixedly installed on one side of the top of the shell.

[0009] Preferably, a box cover is installed on the front side of the shell through a hinge, and a base is fixedly installed at the bottom edge of the shell.

[0010] Preferably, an exhaust groove is provided on the side surface of the shell near the bottom, and an electromagnetic valve is fixedly installed on the outside of the shell at the exhaust groove.

[0011] Preferably, a sealing ring is fixedly mounted on the side of the separation tray, and a bellows is fixedly mounted on the top of the separation tray, and the top of the bellows is fixedly connected to the top inside the shell.

[0012] Preferably, a mounting frame is fixedly mounted on the bottom of the separation tray, and a motor is fixedly mounted at the center of the mounting frame.

[0013] Preferably, an output shaft is fixedly mounted on the output end of the motor, and the top end of the output shaft is fixedly connected to the central shaft.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can maintain the gas separation membrane by installing a maintenance component inside the separation tray, and can drive the scraper to rotate around the central axis through the installation frame, so that the scraper moves in contact with the gas separation membrane, so that the gas separation membrane can be kept flat, and thus the gas separation membrane can maintain a uniform biogas separation effect at different positions when purifying biogas, and the epoxy resin-based composite coating is evenly coated on the surface of the gas separation membrane through the scraper, so that the gas separation membrane can be repaired during the operation, thereby ensuring the working performance of the gas separation membrane.

[0015] 2. The present invention divides the internal space of the shell by a separation tray, so that after the biogas enters the shell, the separation tray moves to compress the size of the space where the biogas is located, and then pressure is applied to the biogas to promote the carbon dioxide gas in the biogas to pass through the gas separation membrane. The temperature of the biogas rises under high pressure, and the high temperature and high pressure are used to further promote the purification of the biogas, thereby improving the purification efficiency of the biogas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional internal structure of the present invention; Figure 3 It is a schematic diagram of the front external structure of the present invention; Figure 4 It is a schematic diagram of the front internal structure of the present invention; Figure 5 It is a schematic diagram of a partial cross-sectional structure of the present invention; Figure 6 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the present invention; Figure 7 It is a schematic diagram of the structure of the maintenance component of the present invention; Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at point A in the middle.

[0017] In the figure: 1. Shell; 101. Gas concentration detector; 102. Box cover; 103. Base; 104. Safety belt; 105. Master control box; 106. Exhaust pipe; 107. Vacuum pump; 108. Inlet pipe; 109. Exhaust groove; 110. Insulation layer; 2. Separation tray; 201. Motor; 202. Mounting frame; 203. Electric telescopic rod; 204. Bellows; 205. Guide groove; 206. Injection barrel; 207. Gas separation membrane; 3. Maintenance assembly; 301. Center axis; 302. Shrapnel; 303. Scraper; 304. Mounting frame; 305. Support frame. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 - Figure 8 As shown, the present invention proposes a biogas purification and refining device that is easy to maintain, including a shell 1, a separation tray 2 and a maintenance component 3. A heat preservation layer 110 is arranged in the shell 1, a safety belt 104 is fixedly installed at the bottom of the shell 1, an air intake pipe 108 is fixedly installed on one side of the top of the shell 1, and a one-way valve is fixedly installed at the connection position between the air intake pipe 108 and the shell 1, and an exhaust pipe 106 is fixedly installed on the side of the top of the shell 1 away from the air intake pipe 108. The shell 1 can provide an installation position for surrounding components, and the heat preservation layer 110 can improve the heat preservation performance of the shell 1, thereby preventing the ambient temperature inside the device from being affected by the ambient temperature outside the device, so that the biogas can be relatively stable. Purification is performed in a closed environment, the safety belt 104 can be connected to the shell 1, and the safety belt 104 is in contact with the ground, so that the static electricity inside the shell 1 is transferred to the ground for release, and the static electricity breakdown generates sparks to ignite the biogas inside the shell 1. The air inlet pipe 108 is used to guide the biogas into the inside of the shell 1, and then the biogas enters the shell 1 and is purified in a closed environment. The exhaust pipe 106 can guide the purified biogas to be discharged from the shell 1, and then the biogas is purified and separated by the separation tray 2 and the maintenance component 3, and the purified biogas is discharged from the exhaust pipe 106, and other separated gases are discharged from the shell 1 from the exhaust slot 109, so as to facilitate the extraction of the purified biogas separately; A separation tray 2 is movably installed inside the shell 1. The separation tray 2 is a double-layer square frame structure. Six fan-shaped through grooves are opened inside the separation tray 2, and a gas separation membrane 207 is fixedly installed inside the fan-shaped through grooves of the separation tray 2. Electric telescopic rods 203 are fixedly installed on both sides of the top of the separation tray 2, and the top of the electric telescopic rod 203 is fixedly connected to the top of the shell 1. Six groups of guide grooves 205 are opened inside the separation tray 2, and the guide grooves 205 extend to the top of the separation tray 2 and a filling barrel 206 is fixedly installed. The separation tray 2 is used to provide an installation position for the surrounding components, and by cooperating with the electric telescopic rod 203, it can drive the surrounding components to move vertically. The gas separation membrane 207 can separate the methane gas and dioxin in the biogas. The carbon dioxide gas is separated, and the methane gas and the carbon dioxide gas can be separated by the different solubility of the carbon dioxide gas and the methane gas in the gas separation membrane 207, so as to realize the purification of the biogas. The electric telescopic rod 203 can be telescoped in the vertical direction, thereby driving the separation tray 2 to move vertically, so that when purifying the biogas, the biogas entering the shell 1 is compressed, so that the pressure of the biogas is gradually increased, thereby improving the separation efficiency of the gas separation membrane 207 for the biogas. The guide groove 205 can guide the silicone rubber material inside the injection barrel 206 to flow to both sides of the gas separation membrane 207, and then cooperate with the scraper 303 to evenly coat the silicone rubber material on the surface of the gas separation membrane 207, thereby realizing the maintenance and cleaning of the gas separation membrane 207; A maintenance component 3 is fixedly installed inside the separation tray 2. The maintenance component 3 can maintain the gas separation membrane 207 without stopping the device, so that the gas separation membrane 207 can be maintained while working, and the device can reduce the frequency of shutdown to improve the efficiency of the device in purifying biogas.

[0020] Furthermore, the maintenance component 3 includes a central axis 301, six groups of mounting frames 304 are fixedly installed on the side of the central axis 301, four square plates are arranged in the mounting frames 304, four scrapers 303 are fixedly installed inside the mounting frames 304, and the scrapers 303 are of a corrugated structure, the scrapers 303 are divided into two groups, and each group of scrapers 303 is installed oppositely, the scrapers 303 are fitted with the gas separation membrane 207, and the central axis 301 can be driven by the motor 201 to rotate, thereby driving other components around synchronously The installation frame 304 can provide a location for the scraper 303 to be installed, and the scraper 303 can rotate synchronously with the installation frame 304, so that the silicone rubber material flowing out of the guide groove 205 can be coated on the surface of the gas separation membrane 207, and the surface of the gas separation membrane 207 can be maintained and cleaned while the gas separation membrane 207 is working, so that the gas separation membrane 207 can separate the gas with better working performance, so as to ensure the purification effect and purification efficiency of the device for biogas; A support frame 305 is fixedly installed on the top and bottom of the central axis 301, and a spring piece 302 is fixedly installed on the side of the support frame 305 facing the installation frame 304. The spring piece 302 has an arched structure and is in contact with the installation frame 304. The support frame 305 can provide an installation position for the spring piece 302, and the spring piece 302 can apply pressure to the installation frame 304, so that the installation frame 304 drives the scraper 303 to fit with the gas separation membrane 207, so that the scraper 303 can evenly coat the silicone rubber material on the surface of the gas separation membrane 207.

[0021] Furthermore, a gas concentration detector 101 is fixedly installed at the top of the shell 1 near the front side, and an air pump 107 is fixedly installed at the top of the shell 1 near the rear side. An air extraction pipe is fixedly installed on the side of the air extraction pump 107, and the air extraction pipe extends to the inside of the shell 1. A main control box 105 is fixedly installed on one side of the top of the shell 1. The gas concentration detector 101 adopts the SN-RS485 type. The gas concentration detector 101 can detect the methane concentration inside the shell 1, and then when the methane concentration rises to a set value, it can feedback an electrical signal to the main control box 105. The main control box 105 then controls the electric telescopic rod 203 to stop contracting, thereby avoiding further compression of the methane gas to cause methane liquefaction. The vacuum pump 107 adopts the FT6-100P model. After the vacuum pump 107 is powered on, it can evacuate the interior of the shell 1, so that the air above the shell 1 and the separation tray 2 is extracted to form a negative pressure environment, and then the biogas is introduced into the shell 1 to avoid other gases in the air from mixing with the biogas, which is beneficial to improving the purification effect of the biogas. The main control box 105 can be connected to other electronic components through wires, so that the various components inside the device can cooperate with each other to work.

[0022] Furthermore, a box cover 102 is installed on the front of the shell 1 through a hinge, and a base 103 is fixedly installed at the bottom edge of the shell 1. The box cover 102 can open the front of the shell 1, thereby facilitating the disassembly and maintenance of the components inside the shell 1. The base 103 can support the shell 1, thereby ensuring the stability of the device during operation.

[0023] Furthermore, an exhaust groove 109 is provided on the side of the shell 1 near the bottom, and an electromagnetic valve is fixedly installed outside the shell 1 at the position of the exhaust groove 109 . The exhaust groove 109 can guide the separated carbon dioxide gas to be discharged from the shell 1 .

[0024] Furthermore, a sealing ring is fixedly installed on the side of the separation tray 2, and a bellows 204 is fixedly installed on the top of the separation tray 2. The top of the bellows 204 is fixedly connected to the top of the inside of the shell 1. The sealing ring can improve the sealing between the separation tray 2 and the inner wall of the shell 1, thereby avoiding air leakage at the edge of the separation tray 2. The bellows 204 can guide the gas entering the inside of the shell 1, thereby avoiding direct contact between the biogas and the shell 1, thereby further reducing the probability of the shell 1 releasing static electricity to ignite the biogas.

[0025] Furthermore, a mounting frame 202 is fixedly installed at the bottom of the separation tray 2, and a motor 201 is fixedly installed at the central position of the mounting frame 202. The mounting frame 202 can fix the motor 201. The motor 201 adopts the YE3-50KW model. The motor 201 can rotate after being energized, thereby driving the central axis 301 and the surrounding components to rotate at a uniform speed.

[0026] Furthermore, an output shaft is fixedly mounted on the output end of the motor 201 , and the top end of the output shaft is fixedly connected to the central shaft 301 .

[0027] Working principle: After the device is assembled and checked and confirmed to be correct, close the air inlet pipe 108 and the exhaust pipe 106, the electric telescopic rod 203 pushes the separation tray 2 to the lowest position, and the vacuum pump 107 evacuates the interior of the shell 1. After the vacuum is completed, open the air inlet pipe 108 to allow biogas to enter the shell 1. After a proper amount of biogas is introduced into the shell 1, close the air inlet pipe 108, control the electric telescopic rod 203 to retract through the main control box 105, and the electric telescopic rod 203 drives the separation tray 2 and the maintenance component 3 to rise vertically, applying pressure to the biogas. Since the solubility of carbon dioxide gas in biogas in the gas separation membrane 207 is greater than that of methane gas, a large amount of carbon dioxide gas passes through the gas separation membrane 207 and enters the cavity below the separation tray 2, and methane gas is retained in the cavity above the separation tray 2. The concentration of methane gas is detected by the gas concentration detector 101. When the methane gas concentration rises to a set value, the exhaust pipe 106 and the exhaust slot 109 are opened at the same time, so that the purified methane gas is discharged from the exhaust pipe 106, and the carbon dioxide gas is discharged from the exhaust slot 109; When the gas separation membrane 207 purifies biogas, the motor 201 is powered on to rotate and drive the central shaft 301 to rotate, and the central shaft 301 drives the mounting frame 304 and the scraper 303 to rotate at a uniform speed. At the same time, the silicone rubber material inside the injection barrel 206 flows to both sides of the gas separation membrane 207 through the guide groove 205, and is evenly coated on the surface of the gas separation membrane 207 through the scraper 303, so as to clean and oxidize the gas separation membrane 207, thereby ensuring the separation effect of the gas separation membrane 207 on carbon dioxide gas in biogas.

[0028] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A biogas purification device that is easy to maintain, comprising a housing (1), a separation tray (2) and a maintenance component (3), characterized in that: A heat-insulating layer (110) is provided inside the shell (1), a safety belt (104) is fixedly installed on the bottom of the shell (1), an air intake pipe (108) is fixedly installed on one side of the top of the shell (1), and a one-way valve is fixedly installed at the connection position between the air intake pipe (108) and the shell (1), and an exhaust pipe (106) is fixedly installed on the side of the top of the shell (1) away from the air intake pipe (108); A separation tray (2) is movably installed inside the shell (1), and the separation tray (2) is a double-layer square frame structure. Six fan-shaped through slots are opened inside the separation tray (2), and a gas separation membrane (207) is fixedly installed inside the fan-shaped through slots of the separation tray (2). Electric telescopic rods (203) are fixedly installed on both sides of the top of the separation tray (2), and the top of the electric telescopic rod (203) is fixedly connected to the top of the shell (1). Six groups of guide grooves (205) are opened inside the separation tray (2), and the guide grooves (205) extend to the top of the separation tray (2) where a material injection barrel (206) is fixedly installed; A maintenance component (3) is fixedly installed inside the separation tray (2).

2. The biogas purification device easy to maintain according to claim 1 is characterized in that: The maintenance component (3) comprises a central axis (301), six groups of installation frames (304) are fixedly installed on the side of the central axis (301), four square plates are arranged in the installation frames (304), four scrapers (303) are fixedly installed inside the installation frames (304), and the scrapers (303) are of a corrugated structure. The scrapers (303) are divided into two groups, and each group of scrapers (303) is installed opposite to each other, and the scrapers (303) are in contact with the gas separation membrane (207); A support frame (305) is fixedly mounted on the top and bottom of the central axis (301), and a spring sheet (302) is fixedly mounted on the side of the support frame (305) facing the installation frame (304). The spring sheet (302) is an arched structure, and the spring sheet (302) is in contact with the installation frame (304).

3. The biogas purification device easy to maintain according to claim 1 is characterized in that: A gas concentration detector (101) is fixedly mounted on the top of the shell (1) near the front side, and an air pump (107) is fixedly mounted on the top of the shell (1) near the rear side. An air extraction pipe is fixedly mounted on the side of the air extraction pump (107), and the air extraction pipe extends into the interior of the shell (1). A main control box (105) is fixedly mounted on one side of the top of the shell (1).

4. The biogas purification device easy to maintain according to claim 1 is characterized in that: A box cover (102) is installed on the front of the shell (1) via a hinge, and a base (103) is fixedly installed at the bottom edge of the shell (1).

5. The biogas purification device easy to maintain according to claim 1 is characterized in that: An exhaust groove (109) is provided on the side of the shell (1) near the bottom, and an electromagnetic valve is fixedly installed on the outside of the shell (1) at the position of the exhaust groove (109).

6. The biogas purification device easy to maintain according to claim 1 is characterized in that: A sealing ring is fixedly mounted on the side of the separation tray (2), and a bellows (204) is fixedly mounted on the top of the separation tray (2), wherein the top of the bellows (204) is fixedly connected to the top of the interior of the shell (1).

7. The biogas purification device easy to maintain according to claim 1 is characterized in that: A mounting frame (202) is fixedly mounted on the bottom of the separation tray (2), and a motor (201) is fixedly mounted at the center of the mounting frame (202).

8. The biogas purification device easy to maintain according to claim 7 is characterized in that: An output shaft is fixedly mounted on the output end of the motor (201), and the top end of the output shaft is fixedly connected to the central shaft (301).

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