Crude benzol filtering and storing tank

Abstract

The utility model provides a crude benzene filters storage cauldron, relate to the technical field of storage cauldron, the utility model discloses a cauldron body, the bottom of cauldron body is provided with the discharge pipe, the outer surface one side of cauldron body is provided with pressure relief device, the pressure relief device includes the round pipe, the top one side fixedly connected with pressure relief pipe of round pipe, the inner wall top of pressure relief pipe is provided with sieve cylinder, the outer surface of sieve cylinder is provided with screen cloth, the utility model discloses a pressure relief device is set up, installs pressure sensor in the inside of cauldron body and detects the pressure in the inside of cauldron body in real time, when the pressure value in the inside of cauldron body increases and exceeds the early warning value, through electric push rod control top rod and round cover removal adjustment sieve cylinder inside the position of pressure relief pipe, make the steam and air in the inside of cauldron body can be discharged outward and relieve pressure through sieve cylinder place, and can be through the activated carbon adsorption material in sieve cylinder inside to the harmful substance in air adsorption filtration, reduce the harmfulness of emission air, improve the security when using storage cauldron.

Description

Technical Field

[0001] This utility model relates to the field of storage tank technology, and in particular to a crude benzene filtration and storage tank. Background Technology

[0002] Crude benzene is one of the products of crude coal gas generated by coal pyrolysis and is an important chemical raw material. In the process of processing crude benzene, the crude benzene filter storage tank is a special device for storing and filtering crude benzene. It can effectively remove insoluble impurities in crude benzene and prevent them from polymerizing during processing, which would cause pipeline blockage.

[0003] When using a crude benzene filtration and storage vessel, crude benzene enters the vessel through the feed pipe at the top of the vessel and is filtered through the filter cartridge inside the vessel before being stored inside. When the crude benzene is stored inside the vessel, the pressure will increase due to the volatilization of the crude benzene. If the temperature inside the vessel is low and the internal pressure cannot be released in time, it may cause overpressure in the vessel and reduce the fluidity of the crude benzene, affecting the normal use of the vessel. Utility Model Content

[0004] The purpose of this invention is to solve the problem that when crude benzene is stored inside the vessel, the pressure will increase due to the volatilization of crude benzene. If the internal temperature of the vessel is low and the internal pressure cannot be discharged in time, it may cause overpressure in the vessel and reduce the fluidity of crude benzene, thus affecting the normal use of the vessel. Therefore, a crude benzene filtration and storage vessel is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a crude benzene filtration and storage vessel, comprising a vessel body, a discharge pipe at the bottom end of the vessel body, a vessel cover at the top end of the vessel body, the vessel cover and the vessel body being connected by fasteners, a feed pipe at the top end of the vessel cover, a collection pipe fixedly connected to the inner wall of the vessel cover, an installation ring fixedly connected to the inner wall of the vessel body, a diversion box being mounted on the outer surface of the installation ring, a plurality of circular grooves being opened inside the diversion box, a filter cartridge being arranged inside the circular grooves, a concentration groove being fixedly connected to the inner wall of the vessel body, the concentration groove being located below the installation ring, and a pressure relief device being provided on one side of the outer surface of the vessel body, which can monitor the pressure inside the vessel body in real time and release pressure in a timely manner to avoid excessive pressure inside the vessel body.

[0006] The effect achieved by the above components is as follows: When using the filter storage vessel, the material conveying and output pipelines are connected to the pipelines at the top of the vessel lid and the bottom of the vessel body, respectively. Crude benzene is conveyed through the pipeline at the top of the vessel lid to the inside of the vessel lid, and then enters the distribution box through the collector pipe. Subsequently, the crude benzene enters different circular grooves on the outer surface of the distribution box. The crude benzene is filtered by the filter cartridges inside the circular grooves, which blocks the insoluble impurities in the crude benzene. The liquid will enter the collection tank and then enter the bottom of the vessel body. Opening the valve of the pipeline connected to the discharge pipe at the bottom of the vessel body can control the output of crude benzene inside the vessel body.

[0007] Preferably, the pressure relief device includes a circular tube, one end of which is fixedly connected to one side of the top of the vessel body. A pressure relief pipe is fixedly connected to one side of the top of the circular tube. A sieve cylinder is provided at the top of the inner wall of the pressure relief pipe. A screen is provided on the outer surface of the sieve cylinder. Activated carbon adsorbent is provided inside the sieve cylinder. A cover plate is provided at the top of the sieve cylinder. A threaded block is fixedly connected to the bottom of the cover plate. The top of the inner wall of the sieve cylinder is threadedly connected to the outer surface of the threaded block. An electric push rod is provided at the top of the circular tube. A top rod is installed at the top of the output rod of the electric push rod. One end of the top rod is located below the cover plate. A rectangular groove is opened on one side of the inner wall of the vessel body. A pressure sensor is installed inside the rectangular groove.

[0008] The effect achieved by the above components is as follows: By setting a round cover, when using the filter storage vessel, the pressure sensor located in the rectangular groove inside the vessel can monitor the pressure inside the vessel in real time. When the pressure inside the vessel exceeds the preset value, the pressure sensor will transmit the signal to the control chip of the electric push rod, controlling the electric push rod to move the top rod upward. The top rod pushes the round cover to control the screen cylinder to move upward inside the pressure relief pipe. At this time, the pressure and steam inside the vessel will enter the inside of the round tube and move towards the pressure relief pipe. After passing through the screen holes on the outer surface of the screen cylinder, they enter the inside of the screen cylinder. The screen on the outer surface of the screen cylinder can filter particulate impurities in the air first. Then the air enters the inside of the screen cylinder, and the activated carbon adsorbent inside the screen cylinder adsorbs harmful substances such as hydrogen sulfide and mercaptans in the discharged air and steam. Then it is discharged through the top of the pressure relief pipe. Then the electric push rod retracts and drives the top rod to descend. The round cover and screen cylinder will slowly descend into the inside of the pressure relief pipe and close the pressure relief pipe again.

[0009] Preferably, an auxiliary tube is fixedly connected to one end of the inner wall of the circular tube, and a plurality of mesh sheets are fixedly connected to one end of the inner wall of the auxiliary tube.

[0010] The effect achieved by the above components is as follows: when the pressure is released through the pressure relief pipe, the steam containing mist droplets will impact the surface of the mesh as it moves through the inside of the auxiliary pipe, causing the mist droplets to aggregate into large droplets due to surface tension, and flow back into the inside of the vessel along the wall of the auxiliary pipe, thus achieving gas-liquid separation.

[0011] Preferably, the outer surface and inner shape of the auxiliary tube are conical, and the diameter of the end of the auxiliary tube closer to the mesh is smaller than the diameter of the end farther away from the mesh.

[0012] The effect achieved by the above components is that by setting a conical auxiliary tube, it is easier for large droplets to flow back into the vessel body and less likely to remain inside the auxiliary tube.

[0013] Preferably, a screw is rotatably connected to the end of the round tube away from the vessel body, and an L-shaped rod is threaded onto the outer surface of the screw. A spring is provided at the top of the cover plate, and the upper and lower ends of the spring are fixedly connected to one end of the L-shaped rod and one end of the cover plate, respectively.

[0014] The effect achieved by the above components is as follows: when the electric push rod operates to push the top rod to control the cover plate to move upward to release pressure, it will squeeze the spring between the L-shaped rod and the cover plate. After the top rod descends, the spring returns to its original state, which can push the cover plate back to its original position more quickly and further tighten the cover plate at the top of the pressure relief pipe.

[0015] Preferably, the end of the L-shaped rod away from the spring slides at the end of the circular tube away from the vessel body.

[0016] The effect achieved by the above components is as follows: rotating the screw can control the L-shaped rod to move upward on the outer surface of the screw, and make one end of the L-shaped rod slide on the outer surface of the round tube, controlling the L-shaped rod to rise, making it easier to move the cover plate so that there is enough space between the cover plate and the pressure relief pipe to remove the screen cylinder, making it easy to remove the screen cylinder for replacement and cleaning.

[0017] Preferably, a round rod is fixedly connected to the top of the cover plate, and the end of the round rod away from the round cover slides on the inner wall of the L-shaped rod.

[0018] The effect achieved by the above components is that when the cover plate moves up and down, the round rod will slide on one end of the inner wall of the L-shaped rod, further restricting the angle between the cover plate and the L-shaped rod and the pressure relief pipe, and minimizing the deviation of the angle when the cover plate moves up and down.

[0019] Preferably, a sealing ring is fixedly connected to the bottom end of the cover plate, and the inner diameter of the sealing ring is adapted to the outer diameter of the pressure relief pipe.

[0020] The effect achieved by the above components is that when the cover plate is placed on the top of the pressure relief pipe, the sealing ring will be fitted around the outside of the top of the pressure relief pipe to further seal the contact between the pressure relief pipe and the cover plate.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, a pressure relief device is installed, and a pressure sensor is installed inside the vessel to detect the pressure inside the vessel in real time. When the pressure inside the vessel increases to exceed the warning value, the electric push rod controls the top rod and the round cover to move and adjust the position of the sieve cylinder inside the pressure relief pipe. This allows the steam and air inside the vessel to be discharged outward through the sieve cylinder to relieve pressure. Furthermore, the activated carbon adsorbent inside the sieve cylinder can adsorb and filter harmful substances in the air, reducing the harmfulness of the emitted air and improving the safety of the storage vessel during use. Attached Figure Description

[0022] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the vessel body of this utility model; Figure 3 This is a three-dimensional structural diagram of the flow divider box of this utility model; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the vessel body of this utility model; Figure 5 This utility model Figure 4 A magnified three-dimensional structural diagram of part A; Figure 6 This is a partial cross-sectional three-dimensional structural diagram of the sealing ring of this utility model; Figure 7 This is a three-dimensional structural diagram of the auxiliary tube of this utility model.

[0023] Legend: 1. Reactor body; 2. Pressure relief device; 21. Round tube; 22. Rectangular groove; 23. Pressure sensor; 24. Pressure relief pipe; 25. Electric push rod; 26. Top rod; 27. Cover plate; 28. Threaded block; 29. ​​Screen cylinder; 210. Auxiliary pipe; 211. Mesh; 212. Screw; 213. L-shaped rod; 214. Spring; 215. Round rod; 216. Sealing ring; 3. Reactor lid; 4. Centralized groove; 5. Mounting ring; 6. Diverter box; 7. Filter cartridge; 8. Collector pipe. Detailed Implementation

[0024] Example 1, as Figure 1-4 As shown, a crude benzene filtration and storage vessel includes a vessel body 1. A discharge pipe is provided at the bottom of the vessel body 1, and a vessel cover 3 is provided at the top of the vessel body 1. The vessel cover 3 is connected to the vessel body 1 by fasteners. A feed pipe is provided at the top of the vessel cover 3. A collector pipe 8 is fixedly connected to the inner wall of the vessel cover 3. An installation ring 5 is fixedly connected to the inner wall of the vessel body 1. A diversion box 6 is mounted on the outer surface of the installation ring 5. Several circular grooves are formed inside the diversion box 6, and filter cartridges 7 are installed inside the circular grooves. A concentration groove 4 is fixedly connected to the inner wall of the vessel body 1, located below the installation ring 5. A pressure monitoring device is provided on one side of the outer surface of the vessel body 1 to monitor the pressure inside the vessel body 1 in real time. The pressure relief device 2 measures and releases pressure in a timely manner to prevent excessive pressure inside the vessel 1. When using the filter storage vessel, the material conveying and output pipelines are connected to the pipelines at the top of the vessel cover 3 and the bottom of the vessel 1, respectively. Crude benzene is conveyed through the pipeline at the top of the vessel cover 3 to the inside of the vessel cover 3, and then enters the distribution box 6 through the collection pipe 8. Subsequently, the crude benzene enters different circular grooves on the outer surface of the distribution box 6. The crude benzene is filtered by the filter cartridge 7 inside the circular groove, which blocks insoluble impurities in the crude benzene. The liquid will enter the collection tank 4 and then enter the bottom of the vessel 1. Opening the valve of the pipeline connected to the discharge pipe at the bottom of the vessel 1 can control the output of crude benzene inside the vessel 1.

[0025] Reference Figure 1-6 As shown in this embodiment: the pressure relief device 2 includes a circular tube 21, one end of which is fixedly connected to one side of the top of the vessel body 1. A pressure relief pipe 24 is fixedly connected to one side of the top of the circular tube 21. A sieve cylinder 29 is provided at the top of the inner wall of the pressure relief pipe 24. A screen is provided on the outer surface of the sieve cylinder 29. Activated carbon adsorbent is provided inside the sieve cylinder 29. A cover plate 27 is provided at the top of the sieve cylinder 29. A threaded block 28 is fixedly connected to the bottom of the cover plate 27. The top of the inner wall of the sieve cylinder 29 is threadedly connected to the outer surface of the threaded block 28. An electric push rod 25 is provided at the top of the circular tube 21. A top rod 26 is installed at the top of the output rod of the electric push rod 25. One end of the top rod 26 is located below the cover plate 27. A rectangular groove 22 is opened on one side of the inner wall of the vessel body 1. A pressure sensor 23 (the pressure sensor model here can be Siemens SITRANS) is installed inside the rectangular groove 22. (P200 diaphragm type sensor). By setting a round cover, when using the filter storage vessel, the pressure sensor 23 located in the rectangular groove 22 inside the vessel body 1 can monitor the pressure inside the vessel body 1 in real time. When the pressure inside the vessel body 1 exceeds the preset value, the pressure sensor 23 will transmit the signal to the control chip of the electric push rod 25, controlling the electric push rod 25 to move the push rod 26 upward. The push rod 26 pushes the round cover to control the screen cylinder 29 to move upward inside the pressure relief pipe 24. At this time, the pressure and steam inside the vessel body 1 will enter the interior of the round pipe 21 and move towards the pressure relief pipe 24. After passing through the sieve holes on the outer surface of the screen cylinder 29, it enters the interior of the screen cylinder 29. The sieve mesh on the outer surface of the screen cylinder 29 can filter particulate impurities in the air first. Then the air enters the interior of the screen cylinder 29 and is filtered by the activated carbon adsorbent inside the screen cylinder 29. The system adsorbs harmful substances such as hydrogen sulfide and mercaptans in the exhaust air and steam, and then discharges them through the top of the pressure relief pipe 24. Subsequently, the electric push rod 25 retracts, causing the top rod 26 to descend. The round cover and the sieve cylinder 29 slowly descend into the pressure relief pipe 24, sealing it again. By setting up the pressure relief device 2 and installing a pressure sensor 23 inside the vessel body 1 to monitor the pressure inside the vessel body 1 in real time, when the pressure value inside the vessel body 1 increases to exceed the warning value, the electric push rod 25 controls the top rod 26 and the round cover to move and adjust the position of the sieve cylinder 29 inside the pressure relief pipe 24. This allows the steam and air inside the vessel body 1 to be discharged outward through the sieve cylinder 29 for pressure relief. The activated carbon adsorbent inside the sieve cylinder 29 can also adsorb and filter harmful substances in the air, reducing the harmfulness of the exhaust air and improving the safety of the storage vessel during use.

[0026] Reference Figure 2-7As shown in this embodiment: an auxiliary pipe 210 is fixedly connected to one end of the inner wall of the circular pipe 21, and several mesh sheets 211 are fixedly connected to one end of the inner wall of the auxiliary pipe 210. When the pressure is released through the pressure relief pipe 24, the vapor containing mist droplets will collide with the surface of the mesh sheets 211 when it moves through the inside of the auxiliary pipe 210, causing the mist droplets to gather into large droplets due to surface tension. The droplets then flow back into the inside of the vessel 1 along the wall of the auxiliary pipe 210, thus achieving gas-liquid separation. The outer surface and inner shape of the auxiliary pipe 210 are conical. The diameter of the end of the auxiliary pipe 210 near the mesh sheets 211 is smaller than the diameter of the end away from the mesh sheets 211. By setting the conical auxiliary pipe 210, it is easier for the large droplets to flow back into the inside of the vessel 1 and less likely to stay inside the auxiliary pipe 210.

[0027] Reference Figure 2-6 As shown in this embodiment: a screw 212 is rotatably connected to the end of the circular tube 21 away from the vessel body 1. An L-shaped rod 213 is threaded onto the outer surface of the screw 212. A spring 214 is provided at the top of the cover plate 27. The upper and lower ends of the spring 214 are fixedly connected to one end of the L-shaped rod 213 and one end of the cover plate 27, respectively. When the electric push rod 25 operates to push the top rod 26 to control the cover plate 27 to move upward to release pressure, it will squeeze the spring 214 between the L-shaped rod 213 and the cover plate 27. After the top rod 26 descends, the spring 214 returns to its original shape, allowing for faster pushing. The movable cover plate 27 returns to its original position, and the cover plate 27 is further tightened at the top of the pressure relief pipe 24. The end of the L-shaped rod 213 away from the spring 214 slides on the end of the round tube 21 away from the vessel body 1. Rotating the screw 212 can control the L-shaped rod 213 to move upward on the outer surface of the screw 212, and make one end of the L-shaped rod 213 slide on the outer surface of the round tube 21. Controlling the L-shaped rod 213 to rise makes it easier to move the cover plate 27 so that there is enough space between the cover plate 27 and the pressure relief pipe 24 to remove the screen cylinder 29, making it easy to remove the screen cylinder 29 for replacement and cleaning.

[0028] Reference Figure 2-6 As shown in this embodiment: a round rod 215 is fixedly connected to the top of the cover plate 27. The end of the round rod 215 away from the round cover slides on the inner wall of the L-shaped rod 213. When the cover plate 27 moves up and down, the round rod 215 will slide on the inner wall of the L-shaped rod 213, further limiting the angle between the cover plate 27, the L-shaped rod 213 and the pressure relief pipe 24, and avoiding the angle deviation of the cover plate 27 when it moves up and down as much as possible. A sealing ring 216 is fixedly connected to the bottom of the cover plate 27. The inner diameter of the sealing ring 216 is adapted to the outer diameter of the pressure relief pipe 24. When the cover plate 27 covers the top of the pressure relief pipe 24, the sealing ring 216 will be sleeved on the outside of the top of the pressure relief pipe 24 to further seal the contact between the pressure relief pipe 24 and the cover plate 27.

[0029] Working principle: When using the filtration and storage vessel, the material conveying and output pipelines are connected to the pipeline at the top of the vessel lid 3 and the pipeline at the bottom of the vessel body 1, respectively. Crude benzene is conveyed through the pipeline at the top of the vessel lid 3 to the inside of the vessel lid 3, and then enters the distribution box 6 through the manifold 8. Subsequently, the crude benzene enters different circular grooves on the outer surface of the distribution box 6, and is filtered by the filter cartridge 7 inside the circular grooves, blocking insoluble impurities in the crude benzene. The liquid will enter the collection tank 4 and then enter the bottom of the vessel body 1. Opening the valve on the pipeline connected to the discharge pipe at the bottom of the vessel body 1 can control the flow of crude benzene inside the vessel body 1. Benzene output: The pressure sensor 23 located in the rectangular groove 22 inside the vessel 1 can monitor the pressure inside the vessel 1 in real time. When the pressure inside the vessel 1 exceeds the preset value, the pressure sensor 23 will transmit the signal to the control chip of the electric push rod 25, controlling the electric push rod 25 to push the top rod 26 upward. The top rod 26 pushes the round cover control screen cylinder 29 to move upward inside the pressure relief pipe 24 and squeeze the spring 214 between the L-shaped rod 213 and the cover plate 27. At this time, the pressure and steam inside the vessel 1 will enter the interior of the round pipe 21 and flow into the pressure relief pipe. As the steam containing droplets moves in the direction of 24, it impacts the surface of the mesh 211 as it passes through the auxiliary pipe 210. This causes the droplets to aggregate into larger droplets due to surface tension, which then flow back along the wall of the auxiliary pipe 210 into the vessel body 1. Subsequently, the steam and air enter the sieve cylinder 29 through the sieve holes on its outer surface. The sieve mesh on the outer surface of the sieve cylinder 29 can filter particulate impurities in the air first. Then, the air enters the sieve cylinder 29, where the activated carbon adsorbent material adsorbs harmful substances such as hydrogen sulfide and mercaptans in the discharged air and steam. The pressure is then discharged through the top of the pressure relief pipe 24. Subsequently, the electric push rod 25 retracts, causing the top rod 26 to descend. The round cover and screen cylinder 29 will slowly descend into the interior of the pressure relief pipe 24, sealing the pressure relief pipe 24 again. Rotating the screw 212 can control the L-shaped rod 213 to move upward on the outer surface of the screw 212, and make one end of the L-shaped rod 213 slide on the outer surface of the round pipe 21. Controlling the L-shaped rod 213 to rise makes it easier to move the cover plate 27 so that there is enough space between the cover plate 27 and the pressure relief pipe 24 to remove the screen cylinder 29, making it easy to remove the screen cylinder 29 for replacement and cleaning.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A crude benzene filtration storage tank comprising a tank body (1), characterized in that: The bottom end of the vessel body (1) is provided with a discharge pipe, the top end of the vessel body (1) is provided with a vessel cover (3), the vessel cover (3) and the vessel body (1) are connected by fasteners, the top end of the vessel cover (3) is provided with a feed pipe, the inner wall of the vessel cover (3) is fixedly connected with a flow collection pipe (8), the inner wall of the vessel body (1) is fixedly connected with an installation ring (5), the outer surface of the installation ring (5) is provided with a flow distribution box (6), the inside of the flow distribution box (6) is provided with several circular grooves, the inside of the circular grooves is provided with a filter cartridge (7), the inner wall of the vessel body (1) is fixedly connected with a concentration groove (4), the concentration groove (4) is located below the installation ring (5), and one side of the outer surface of the vessel body (1) is provided with a pressure relief device (2) that can monitor the pressure inside the vessel body (1) in real time and release pressure in time to avoid excessive pressure inside the vessel body (1).

2. A crude benzol filtering storage tank according to claim 1, characterized in that: The pressure relief device (2) includes a circular tube (21), one end of which is fixedly connected to one side of the top of the vessel body (1). A pressure relief pipe (24) is fixedly connected to one side of the top of the circular tube (21). A sieve cylinder (29) is provided at the top of the inner wall of the pressure relief pipe (24). A sieve screen is provided on the outer surface of the sieve cylinder (29). Activated carbon adsorbent is provided inside the sieve cylinder (29). A cover plate (27) is provided at the top of the sieve cylinder (29). A threaded block (28) is fixedly connected to the bottom end of the sieve cylinder (29). The top end of the inner wall of the sieve cylinder (29) is threadedly connected to the outer surface of the threaded block (28). An electric push rod (25) is provided at the top end of the round tube (21). A top rod (26) is installed at the top end of the output rod of the electric push rod (25). One end of the top rod (26) is located below the cover plate (27). A rectangular groove (22) is opened on one side of the inner wall of the vessel body (1). A pressure sensor (23) is installed inside the rectangular groove (22).

3. A crude benzol filtering storage tank according to claim 2, characterized in that: An auxiliary tube (210) is fixedly connected to one end of the inner wall of the circular tube (21), and several mesh pieces (211) are fixedly connected to one end of the inner wall of the auxiliary tube (210).

4. The crude benzene filtration and storage vessel according to claim 3, characterized in that: The auxiliary tube (210) has a tapered outer surface and an inner shape. The diameter of the end of the auxiliary tube (210) closer to the mesh (211) is smaller than the diameter of the end farther away from the mesh (211).

5. The crude benzene filtration and storage vessel according to claim 4, characterized in that: The end of the round tube (21) away from the vessel body (1) is rotatably connected to a screw (212), and an L-shaped rod (213) is threaded onto the outer surface of the screw (212). A spring (214) is provided at the top of the cover plate (27), and the upper and lower ends of the spring (214) are fixedly connected to one end of the L-shaped rod (213) and one end of the cover plate (27), respectively.

6. The crude benzene filtration and storage vessel according to claim 5, characterized in that: The end of the L-shaped rod (213) away from the spring (214) slides on the end of the round tube (21) away from the vessel body (1).

7. The crude benzene filtration and storage vessel according to claim 6, characterized in that: A round rod (215) is fixedly connected to the top of the cover plate (27), and the end of the round rod (215) away from the round cover slides on the inner wall of the L-shaped rod (213).

8. The crude benzene filtration and storage vessel according to claim 7, characterized in that: A sealing ring (216) is fixedly connected to the bottom end of the cover plate (27), and the inner diameter of the sealing ring (216) is adapted to the outer diameter of the pressure relief pipe (24).

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