Wellhead sand removal device for raw gas

Abstract

The application discloses a wellhead sand removing device for raw material gas, and relates to the technical field of raw material gas impurity removing, which comprises a tank body, a small cyclone and a large cyclone are arranged in series in the tank body, a third pipeline is connected to the large cyclone, the third pipeline is connected to a gas distributor, a vertical baffle is arranged on the side of the tank body of the gas distributor, a pollution collecting bag is arranged at the bottom of the tank body, the pollution collecting bag is arranged on the side of the bottom end of the baffle, a gas outlet is arranged on the tank body above the pollution collecting bag, a wire mesh demister is arranged on the gas outlet, and a material level meter and a liquid level meter are further arranged on the tank body. The device adopts a multi-stage cyclone series connection design, has wide load adaptability, overcomes the poor sand removing effect caused by wellhead pressure attenuation and reduced gas production of the existing sand remover, has good filtering effect, and can better complete the sand removing work of the raw material gas and facilitate manual operation.

Description

Technical Field

[0001] This invention relates to the field of raw gas impurity removal technology, specifically to a wellhead sand removal device for raw gas. Background Technology

[0002] With the application of various development methods in oil fields, the quality of natural gas feedstock becomes increasingly poor before primary processing, containing a large amount of mist and fine gravel impurities. The presence of these impurities can cause blockages or even damage to precision pressure regulating and metering equipment, affecting production and causing losses. At the same time, since solid particles are natural crystal nuclei for water freezing and the formation of natural gas hydrates under low-temperature conditions, their presence exacerbates the problems existing in the production of gases containing mist and gravel impurities.

[0003] Currently, existing technologies mainly use three-phase separators to separate and process raw gas.

[0004] Existing technologies have a narrow range of adaptability to operating conditions. They cannot meet the requirements for efficient separation when wellhead pressure decreases and gas production drops. Furthermore, they require real-time monitoring of liquid level and other parameters, which is labor-intensive and increases labor costs. The equipment is designed with high pressure and has high manufacturing costs. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention discloses a wellhead desanding device for raw gas. The device is equipped with multi-stage desanding and remote liquid level transmission, which can effectively complete the desanding work of raw gas and facilitate manual operation.

[0006] Based on the above, the wellhead sand removal device of the present invention includes the following structure:

[0007] One tank;

[0008] A small cyclone is installed inside the tank. The bottom drain pipe of the small cyclone is installed through the tank. A first drain valve is installed on the drain pipe of the small cyclone below the tank.

[0009] A large cyclone is located inside the tank, next to a small cyclone. The bottom drain pipe of the large cyclone runs through the tank, and a second drain valve is installed on the drain pipe of the large cyclone below the tank.

[0010] A first pipe passes through the tank body, with the air inlet of the first pipe located outside the tank body and the air outlet of the first pipe connected to the air inlet on the side of the small cyclone.

[0011] A second pipe is provided in the tank. The air inlet of the second pipe is connected to the air outlet at the top of the small cyclone, and the air outlet of the second pipe is connected to the air inlet on the side of the large cyclone.

[0012] A third pipe is installed inside the tank, and the air inlet of the third pipe is connected to the air outlet at the top of the large cyclone.

[0013] A gas distributor, the inlet of which is connected to the outlet of the third pipe, and the gas distributor is located on the side of the large cyclone.

[0014] A baffle is vertically suspended in the tank, with its top end fixed to the top wall of the tank's inner cavity. The baffle is located to the side of the gas distributor.

[0015] A sludge collection bag is installed at the bottom of the tank. The sludge collection chamber of the sludge collection bag is connected to the inner cavity of the tank. A third sludge discharge valve is provided at the bottom of the sludge collection bag, and the sludge collection bag is located on the side of the bottom end of the baffle.

[0016] One vent is located at the top of the tank, above the sludge collection bag.

[0017] Furthermore, the apparatus of the present invention further includes:

[0018] A boom is vertically installed inside the tank, with one end fixed to the tank and the other end fixed to the outside of the third pipe.

[0019] Furthermore, the apparatus of the present invention further includes:

[0020] A radar level gauge or ultrasonic level gauge is installed on top of the tank.

[0021] Furthermore, the apparatus of the present invention further includes:

[0022] A patch-type remote level gauge is installed on the side of the tank.

[0023] Furthermore, the apparatus of the present invention further includes:

[0024] A wire mesh demister is installed outside the tank body, above the sludge collection bag, and the air chamber of the wire mesh demister is connected to the inner cavity of the tank body. The air outlet is located at the top of the wire mesh demister.

[0025] Furthermore, the apparatus of the present invention further includes:

[0026] The first and second wire meshes are used to intercept water vapor and mist droplets, with the second wire mesh located directly below the first wire mesh.

[0027] A cover, the top of which is provided with the air outlet, and the air outlet at the bottom of the cover is connected to a pipe opening provided at the top of the tank;

[0028] A hollow cylinder with a vertical through hole in its center is vertically fixed inside the cover.

[0029] A cross-shaped upper frame is horizontally placed in the upper port of the through hole. The upper frame includes a first push plate symmetrically arranged at both ends. A first wire mesh is fixedly connected to the top of the upper frame. The first wire mesh is flush with the top of the hollow cylinder.

[0030] A cross-shaped lower frame is horizontally placed in the lower port of the through hole. The lower frame includes a second push plate symmetrically arranged at both ends. A second wire mesh is fixedly connected to the top of the lower frame. The second wire mesh is flush with the bottom of the hollow cylinder.

[0031] A pair of support blocks are symmetrically fixed to the inner walls on both sides of the middle of the through hole, and the support blocks on both sides are respectively located between the first push plate and the second push plate;

[0032] A pair of first springs, one end of which is fixed to the first push plate and the other end of which is fixed to the top of the support block, the first spring having the force to pull the upper frame and the first wire mesh on it downward;

[0033] A pair of second springs, one end of which is fixed to the second push plate and the other end of which is fixed to the bottom end of the support block, the second springs have the force to pull the lower frame and the second wire mesh on it upward;

[0034] An electric motor is located outside the enclosure. The power output end of the electric motor is connected to a rotating shaft. The rotating shaft passes through the enclosure, extends from the hollow cylinder to the through hole, and a cam is connected to the inner end of the rotating shaft. The cam is located in the middle position between the center of the upper frame and the center of the lower frame.

[0035] An upper pulley is connected to an upper wheel seat. The top of the upper wheel seat is fixed to the center of the bottom of the upper frame. The upper pulley is in contact with the edge of the cam.

[0036] A lower pulley is connected to a lower pulley seat. The bottom end of the lower pulley seat is fixed to the center of the top of the lower frame, and the lower pulley is in contact with the edge of the cam.

[0037] Furthermore, an annular groove is formed in the middle of the outer side of the hollow cylinder. The annular groove on the outer side of the hollow cylinder and the inner wall of the cover form a cavity. The cavity is filled with refrigerant. The cavity is connected to a fourth pipe and a fifth pipe. The fourth pipe is located above the fifth pipe. A valve is installed on both the fourth pipe and the fifth pipe. The refrigerant is input into the cavity through the fourth pipe and output from the cavity through the fifth pipe.

[0038] Preferably, the device is manufactured as a skid-mounted integrated unit.

[0039] The beneficial effects of this invention are:

[0040] In this embodiment, the multi-stage sand removal system installed inside the tank can effectively prevent blockage, has a wide range of adaptability to operating conditions, and can overcome situations such as wellhead pressure decay and reduced gas production.

[0041] Because this device is designed with a built-in cyclone separator, it can be designed for low pressure, reducing manufacturing costs and improving operational safety.

[0042] The multi-stage cyclone separator series design has a wide load adaptability and overcomes the shortcomings of existing desanders caused by wellhead pressure decay and reduced gas production, resulting in poor desanding effect and good filtration effect.

[0043] The wire mesh demister installed at the top of the tank in this invention has a novel structure and ingenious design. The split first and second wire meshes can effectively intercept and capture water vapor and mist in the gas. By adding components such as cams, pulleys and frames, the first and second wire meshes are driven to move up and down reciprocally, which speeds up the falling of water droplets condensed in the wire mesh and improves the working efficiency of the wire mesh demister. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of the device according to an embodiment of the present invention;

[0046] Figure 2 yes Figure 1 A partial structural diagram of the air outlet location;

[0047] Figure 3 yes Figure 1 Schematic diagram of a medium wire mesh demister;

[0048] Figure 4 yes Figure 1 Schematic diagram of the structure of the medium wire mesh demister (first wire mesh action);

[0049] Figure 5 yes Figure 1 Schematic diagram of the structure of the medium wire mesh demister (second wire mesh action);

[0050] Figure 6 yes Figure 1 A schematic diagram of the structure of a medium-sized wire mesh demister (view from above);

[0051] The diagram is marked as follows:

[0052] 1. Tank body; 101. Pipe opening;

[0053] 2. Small Cyclone; 201. First Drain Valve;

[0054] 3. Large cyclone separator; 301. Second drain valve;

[0055] 4. First pipe; 5. Second pipe; 6. Third pipe; 7. Hanger; 8. Gas distributor; 9. Baffle; 10. Level gauge; 11. Liquid level gauge; 12. Sludge collection bag; 1201. Third drain valve; 13. Wire mesh demister; 14. Gas outlet;

[0056] 15. Cover body; 16. Hollow cylinder; 17. Through hole; 18. Cavity; 19. Fourth pipe; 20. Fifth pipe; 21. Upper frame; 23. First wire mesh; 24. Lower frame; 25. Second push plate; 26. Second wire mesh; 27. Support block; 28. First spring; 29. ​​Second spring; 30. Electric motor; 31. Rotating shaft; 32. Cam; 33. Upper pulley; 34. Upper wheel seat; 35. Lower pulley; 36. Lower wheel seat.

[0057] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0059] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. The meaning of "and / at" throughout the text is to include three parallel solutions; taking "A and / or B as an example," it includes solution A, or solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0062] This invention proposes a wellhead sand removal device for raw gas. Please refer to [link / reference]. Figure 1 As shown, it includes the following component structures:

[0063] A tank body 1, which is placed horizontally by a support provided at its bottom, and has detachable end caps at both ends;

[0064] A built-in mini cyclone 2 is vertically fixedly installed in the inner cavity of the tank 1. The bottom drain pipe of the mini cyclone 2 is set through the tank 1. A first drain valve 201 is installed on the drain pipe of the mini cyclone 2 below the tank 1.

[0065] A built-in large cyclone 3 is vertically fixed in the inner cavity of the tank 1, and the large cyclone 3 is located to the side of the small cyclone 2 (gas flows to one side). The bottom drain pipe of the large cyclone 3 is set through the tank 1, and a second drain valve 301 is installed on the drain pipe of the large cyclone 3 below the tank 1.

[0066] A first pipe 4 passes through the tank body 1. The air inlet of the first pipe 4 is located outside the tank body 1, and the air outlet of the first pipe 4 is connected to the air inlet on the side of the small cyclone 2.

[0067] A second pipe 5 is built into the tank 1. The air inlet of the second pipe 5 is connected to the air outlet at the top of the small cyclone 2, and the air outlet of the second pipe 5 is connected to the air inlet on the side of the large cyclone 3.

[0068] A third pipe 6 is built into the tank 1, and the air inlet of the third pipe 6 is connected to the air outlet at the top of the large cyclone 3.

[0069] A lifting rod 7 is vertically installed in the tank 1. One end of the lifting rod 7 is fixedly connected to the top wall of the inner cavity of the tank 1, and the other end of the lifting rod 7 is fixedly connected to the outside of the third pipe 6. The tie rod is used to install and fix the third pipe 6.

[0070] A gas distributor 8, the inlet of which is connected to the outlet of the third pipe 6, and the gas distributor 8 is located on the side of the large cyclone 3 (gas flows to one side).

[0071] A short-circuit defoaming baffle 9 is vertically suspended in the tank 1. The top of the baffle 9 is fixedly connected to the top wall of the inner cavity of the tank 1. The baffle 9 is located on the side of the gas distributor 8 (to one side of the gas flow).

[0072] A radar (or ultrasonic) level gauge 10 is installed on the top of the tank 1;

[0073] A patch-type remote level gauge 11 is installed on the side of the tank body 1;

[0074] A sludge collection bag 12 is provided at the bottom of the tank body 1. The sludge collection chamber of the sludge collection bag 12 is connected to the inner cavity of the tank body 1. A third drain valve 1201 is provided at the bottom of the sludge collection bag 12, and the sludge collection bag 12 is located on the side of the bottom end of the baffle 9 (gas flows to one side).

[0075] A wire mesh demister 13 is installed on the top of the tank 1. Specifically, it is installed above the sludge collection bag 12, and the air chamber of the wire mesh demister 13 is connected to the inner cavity of the tank 1. An air outlet 14 is provided on the top of the wire mesh demister 13.

[0076] The working principle of the wellhead desanding device for raw gas in this embodiment is as follows: the raw gas from the wellhead enters the tank 1 through the inlet end of the first pipe 4. It first enters the small cyclone 2 through the first pipe 4 for initial separation, then enters the large cyclone 3 through the second pipe 5 for secondary separation, and then enters the gas distributor 8 through the third pipe 6, so that the raw gas is distributed in the rear half of the tank 1. The impurities carried in the raw gas are filtered by natural sedimentation and wire mesh demister 13, and finally enter the next stage through the outlet 14.

[0077] It is worth noting that the raw gas may generate foam due to the high pressure after passing through the small cyclone separator 2 and the large cyclone separator 3. The anti-short-circuit defoaming baffle 9 installed inside the tank 1 can prevent the gas from directly impacting the wire mesh demister 13 after passing through the gas distributor 8, which would result in an unsatisfactory impurity removal effect. The wire mesh demister 13 can effectively eliminate the mist entrained in the gas.

[0078] After the raw gas enters the tank 1, the level inside the tank 1 is monitored in real time by radar (or ultrasonic) level gauge 10 and patch-type remote level gauge 11. The non-contact combination remote monitoring of the liquid level can promptly remind the tank to discharge wastewater.

[0079] Impurities separated from the small cyclone separator 2 and the large cyclone separator 3 in tank 1 are periodically cleaned through the first drain valve 201 and the second drain valve 301. Impurities that are naturally separated accumulate at the bottom of tank 1 in the sludge collection bag 12 and are then discharged through the third drain valve 1201.

[0080] In one embodiment of the present invention, the device can be manufactured in a skid-mounted integrated manner, which facilitates equipment transportation and installation.

[0081] Based on the above, in some specific embodiments, combined with Figures 2-6 As shown, the wire mesh demister 13 specifically includes the following structural components:

[0082] A cover 15, the top of which is provided with the air outlet 14, and the bottom air outlet of the cover 15 is connected to a pipe 101 provided on the top of the tank 1 by a flange.

[0083] A hollow cylinder 16 has a through hole 17 vertically opened at its center and an annular groove opened at the middle of its outer side. The hollow cylinder 16 is vertically fixed inside the cover 15. The annular groove on the outer side of the hollow cylinder 16 and the inner wall of the cover 15 form a cavity 18. The cavity 18 is filled with refrigerant. The refrigerant source can be various coolants, such as chilled water provided by a ground source heat pump or various refrigerants in the production process. The cavity 18 is connected to a fourth pipe 19 and a fifth pipe 20. The fourth pipe 19 is located above the fifth pipe 20. A solenoid valve is installed on both the fourth pipe 19 and the fifth pipe 20. The refrigerant is input into the cavity 18 through the fourth pipe 19 and output from the cavity 18 through the fifth pipe 20.

[0084] The upper frame 21 is shaped like a rice character and is horizontally placed in the upper port of the through hole 17. The upper frame 21 includes first push plates symmetrically arranged at both ends. A circular first wire mesh 23 is fixedly connected to the top of the upper frame 21. The first wire mesh 23 is flush with the top of the hollow cylinder 16.

[0085] The lower frame 24 is shaped like a rice character and is horizontally placed in the lower port of the through hole 17. The lower frame 24 includes a second push plate 25 symmetrically arranged at both ends. A circular second wire mesh 26 is provided at the top of the lower frame 24 and is fixedly connected to it. The second wire mesh 26 is flush with the bottom of the hollow cylinder 16.

[0086] A pair of support blocks 27 are symmetrically fixed to the inner walls on both sides of the middle of the through hole 17. The support blocks 27 on both sides are respectively located between the first push plate and the second push plate 25.

[0087] A pair of first springs 28, one end of which is fixed to the first push plate and the other end of which is fixed to the top of the support block 27. The first springs 28 have the force to pull the upper frame 21 and the first wire mesh 23 on it downward.

[0088] A pair of second springs 29, one end of which is fixed to the second push plate 25 and the other end of which is fixed to the bottom end of the support block 27, the second springs 29 have the force to pull the lower frame 24 and the second wire mesh 26 on it upward.

[0089] An electric motor 30 is horizontally fixedly installed on the outer side of the cover 15. The power output end of the electric motor 30 is connected to a rotating shaft 31. The rotating shaft 31 passes through the cover 15 and the hollow cylinder 16 and extends into the through hole 17. A sealed bearing is sleeved on the rotating shaft 31 at the connection with the hollow cylinder 16, and a cam 32 is connected to the inner end of the rotating shaft 31. The cam 32 is located at the middle position between the center of the upper frame 21 and the center of the lower frame 24.

[0090] An upper pulley 33 is connected to an upper wheel seat 34. The top of the upper wheel seat 34 is fixedly connected to the bottom center of the upper frame 21. The upper pulley 33 is in contact with the edge of the cam 32.

[0091] A lower pulley 35 is connected to a lower pulley seat 36. The bottom end of the lower pulley seat 36 is fixed to the top center of the lower frame 24. The lower pulley 35 is in contact with the edge of the cam 32.

[0092] Based on the above, the working principle of the wire mesh demister 13 in this embodiment is as follows:

[0093] The motor 30 starts, the speed is set and adjusted, and the cam 32 is driven to rotate via the rotating shaft 31. Due to the structural characteristics of the cam 32 and the setting of the first spring 28 and the second spring 29, as shown in the figure, the cam 32 can reciprocate to push the upper pulley 33 and the lower pulley 35 up and down during the rotation, thereby driving the first wire mesh 23 and the second wire mesh 26 to move up and down. When the wire mesh moves, it will accelerate the fall of the water droplets condensed in the wire mesh, so as to improve the effect and efficiency of the wire mesh in "intercepting" water vapor and mist in the gas. The condensed water droplets are obtained by repeated physical collisions and aggregation of water vapor and mist in the gas in the wire mesh.

[0094] Specifically, under the pull of the first spring 28, when the protruding part of the cam 32 abuts vertically against the upper pulley 33, the upper frame 21 and the first wire mesh 23 are pushed above the hollow cylinder 16, and the upper opening of the through hole 17 is opened. Water vapor and mist in the gas are mainly "captured" by the second wire mesh 26. When a large amount of water droplets on the first wire mesh 23 affects gas flow, the opening of the upper opening of the through hole 17 facilitates gas flow. Figure 4As shown; similarly, under the pull of the second spring 29, when the protrusion of the cam 32 abuts vertically against the lower pulley 35, the lower frame 24 and the second wire mesh 26 are pushed below the hollow cylinder 16, and the lower end of the through hole 17 is opened. Water vapor and mist in the gas are mainly "captured" by the first wire mesh 23. When the amount of water droplets on the second wire mesh 26 is large and affects gas flow, the opening of the lower end of the through hole 17 facilitates gas flow. Figure 5 As shown.

[0095] It is conceivable and understandable that the hollow cylinder 16, the upper skeleton 21, the lower skeleton 24, the first wire mesh 23, and the second wire mesh 26 are all made of thermally conductive materials. The presence of the cavity 18 structure and the setting of the refrigerant can reduce the temperature of the first wire mesh 23 and the second wire mesh 26 under the action of heat conduction, thereby further improving the "capture" of water vapor and mist in the gas by the wire mesh.

[0096] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A wellhead sand removal device for raw gas, characterized in that, It includes the following structure: One tank; A small cyclone is installed inside the tank. The bottom drain pipe of the small cyclone is installed through the tank. A first drain valve is installed on the drain pipe of the small cyclone below the tank. A large cyclone separator is located inside the tank, next to a smaller cyclone separator. A drain pipe from the bottom of the large cyclone separator penetrates the tank. A second drain valve is installed on the drain pipe of the large cyclone separator at the bottom of the tank. A first pipe passes through the tank, with its inlet located outside the tank and its outlet connected to the air inlet on the side of the smaller cyclone separator. A second pipe is located inside the tank, with its inlet connected to the air outlet at the top of the smaller cyclone separator and its outlet connected to the air inlet on the side of the large cyclone separator. A third pipe is located inside the tank. Inside the tank, the air inlet of the third pipe is connected to the air outlet at the top of the large cyclone generator; a gas distributor, the air inlet of which is connected to the air outlet of the third pipe, and the gas distributor is located to the side of the large cyclone generator; a baffle, which is vertically suspended in the tank, with its top fixed to the top wall of the tank's inner cavity, and the baffle is located to the side of the gas distributor; a sludge collection bag, which is located at the bottom of the tank, with its sludge collection chamber communicating with the inner cavity of the tank, and a third sludge discharge valve at the bottom of the sludge collection bag, and the sludge collection bag is located to the side of the bottom end of the baffle; and an air outlet, which is located at the top of the tank, above the sludge collection bag. A wire mesh demister is installed outside the tank body, above the sludge collection bag, and the air chamber of the wire mesh demister is connected to the inner cavity of the tank body. The air outlet is located at the top of the wire mesh demister. The first and second wire meshes are used to intercept water vapor and mist droplets, with the second wire mesh located directly below the first wire mesh. The wire mesh demister also includes: a cover, the top of which is provided with the air outlet, and the bottom air outlet of the cover is connected to a pipe provided on the top of the tank; A hollow cylinder with a vertical through hole in its center is vertically fixed inside the cover. A cross-shaped upper frame is horizontally placed in the upper port of the through hole. The upper frame includes a first push plate symmetrically arranged at both ends. A first wire mesh is fixedly connected to the top of the upper frame. The first wire mesh is flush with the top of the hollow cylinder. A cross-shaped lower frame is horizontally placed in the lower port of the through hole. The lower frame includes a second push plate symmetrically arranged at both ends. A second wire mesh is fixedly connected to the top of the lower frame. The second wire mesh is flush with the bottom of the hollow cylinder. A pair of support blocks are symmetrically fixed to the inner walls on both sides of the middle of the through hole, and the support blocks on both sides are respectively located between the first push plate and the second push plate; A pair of first springs, one end of which is fixed to the first push plate and the other end of which is fixed to the top of the support block, the first spring having the force to pull the upper frame and the first wire mesh on it downward; A pair of second springs, one end of which is fixed to the second push plate and the other end of which is fixed to the bottom end of the support block, the second springs have the force to pull the lower frame and the second wire mesh on it upward; An electric motor is located outside the enclosure. The power output end of the electric motor is connected to a rotating shaft. The rotating shaft passes through the enclosure, extends from the hollow cylinder to the through hole, and a cam is connected to the inner end of the rotating shaft. The cam is located in the middle position between the center of the upper frame and the center of the lower frame. An upper pulley is connected to an upper wheel seat. The top of the upper wheel seat is fixed to the center of the bottom of the upper frame, and the upper pulley is in contact with the edge of the cam. A lower pulley is connected to a lower pulley seat. The bottom end of the lower pulley seat is fixed to the center of the top of the lower frame. The lower pulley is in contact with the edge of the cam. An annular groove is formed in the middle of the outer side of the hollow cylinder. The annular groove on the outer side of the hollow cylinder and the inner wall of the cover form a cavity. The cavity is filled with refrigerant. The cavity is connected to a fourth pipe and a fifth pipe. The fourth pipe is located above the fifth pipe. A valve is installed on both the fourth pipe and the fifth pipe. The refrigerant is input into the cavity through the fourth pipe and output from the cavity through the fifth pipe.

2. The apparatus according to claim 1, characterized in that, It also includes: a boom, which is vertically installed in the tank, with one end of the boom fixed to the tank and the other end fixed to the outside of the third pipe.

3. The apparatus according to claim 1, characterized in that, It also includes: a radar level gauge or an ultrasonic level gauge, which is installed on the top of the tank.

4. The apparatus according to claim 1, characterized in that, It also includes: a patch-type remote level gauge, which is installed on the side of the tank.

5. The apparatus according to claim 1, characterized in that, The device is manufactured using a skid-mounted integrated design.

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