Purification equipment for natural gas wellhead

Abstract

The invention discloses purification equipment for a natural gas wellhead, and relates to the technical field of natural gas purification. The purification equipment for the natural gas wellhead comprises a shell, a gravel filter screen is fixedly connected to the interior of the shell, and a first rotating shaft is rotationally connected to the interior of the shell; the outer side of the first rotating shaft is fixedly connected with a first gear, the interior of the shell is movably connected with a second rotating shaft, the outer side of the second rotating shaft is fixedly connected with a second gear, the bottom of the second rotating shaft is fixedly connected with a reciprocating lead screw, the outer side of the reciprocating lead screw is in threaded connection with a threaded block, and the inner side of the threaded block is fixedly connected with a first opening fixing block. A first roller is rotationally connected into the first opening fixing block, a first triangular push block is movably connected to the inner side of the first hydraulic block, and the first hydraulic block is movably connected with the water curtain plate through a transmission piece. According to the purification equipment for the natural gas wellhead, the rotating shaft I rotates, so that the roller I reciprocates up and down, and fine gravels and water in natural gas are separated.

Description

Technical Field

[0001] This invention relates to the field of natural gas purification technology, specifically to a purification device for natural gas wellheads. Background Technology

[0002] With the continuous updating of natural gas extraction technology and the breakthroughs in drilling and production depth from deep wells to ultra-deep wells, especially the hydraulic fracturing technology used in unconventional natural gas extraction, the extracted natural gas carries a large amount of particulate matter and formation sand, and the pressure is high and the gas flow rate is fast, which makes the sand and gravel move faster.

[0003] Chinese patent CN116696287A, authorized and published on September 5, 2023, discloses a purification device for natural gas wellheads, including a wellhead gas transmission pipe, a filtering mechanism, and a sand removal mechanism. The wellhead gas transmission pipe is vertically installed on the natural gas wellhead. An installation frame is installed on the upper end of the side wall of the wellhead gas transmission pipe, a gas outlet pipe is installed on the side wall of the installation frame, and a gravel collection frame is installed at the bottom of the installation frame. In the above application, when the device is started, the filtering mechanism can filter larger gravel particles. However, when the gravel particles are small, relying solely on the filtering mechanism will reduce the overall working efficiency of the device, thereby increasing the internal pressure of the device and shortening its service life. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a purification device for natural gas wellheads, solving the problems mentioned in the background section. To achieve the above objectives, this invention provides the following technical solution: a purification device for natural gas wellheads, comprising: The outer casing has an air inlet fixedly connected to its bottom and exhaust ports fixedly connected to both sides. A gravel filter is fixedly connected inside the casing. A rotating shaft is rotatably connected inside the casing. A gear is fixedly connected to the outer side of the rotating shaft. Multiple rotating shafts are movably connected inside the casing, with gears fixedly connected to their outer sides. Gears mesh with gears. A reciprocating screw is fixedly connected to the bottom of each rotating shaft. A threaded block is threadedly connected to the outer side of the reciprocating screw. An open fixing block is fixedly connected to the inner side of the threaded block. A roller is rotatably connected inside the open fixing block. A hydraulic block is fixedly connected to the side wall surface of the casing. A triangular push block is movably connected to the inner side of the hydraulic block. The hydraulic block is movably connected to the water curtain plate via a transmission component. The system is equipped with a water curtain plate and a roller. During filtration, water flows out from the outlet and forms a water curtain by contacting the water curtain plate. This allows the upward-blown natural gas to come into contact with the water curtain, absorbing the fine sand and gravel mixed in with it. At the same time, the water mixed in with the natural gas is absorbed by the water-absorbing sponge layer. Then, the roller moves up and down to squeeze out the water from the water-absorbing sponge layer, thus achieving the effect of equipment recycling. This also speeds up the filtration efficiency and avoids high pressure caused by low filtration efficiency, thereby extending the service life of the equipment.

[0005] Preferably, the transmission component includes a first hose, a support frame, a water tank, a water outlet, a water inlet pipe, a second hydraulic block, a fixed slide groove, a first push block, a first spring, and a slider. Multiple support frames are fixedly connected to the bottom of the outer casing. A water tank is fixedly connected to the top of the support frames. The water tank has an outlet at its bottom and a water inlet pipe fixedly connected to its bottom. The bottom of the first hydraulic block is fixedly connected to one end of the first hose, and the other end of the first hose is fixedly connected to the side of the second hydraulic block. A fixed slide groove is fixedly connected to the bottom of the water tank. The second hydraulic block is fixedly connected to the rear side of the fixed slide groove. A first push block is movably connected to the front side of the second hydraulic block. A first spring is fixedly connected between the slider and the second hydraulic block. A slider is fixedly connected to the front side of the first push block. A water curtain plate is fixedly connected to the bottom of the slider, and both ends of the slider are slidably connected to the fixed slide groove.

[0006] Preferably, a dust discharge pipe is fixedly connected to the bottom of the outer shell, a water-absorbing sponge layer is fixedly connected to the outer side of the gravel filter screen, a drain pipe is fixedly connected to the bottom of the outer shell, a squeeze drainage assembly is fixedly connected to the outer side of the threaded block, and an anti-clogging assembly is fixedly connected to the bottom of the dust discharge pipe.

[0007] Preferably, the number of gears two is four, each gear two being circumferentially distributed about the center of the outer casing; the number of shafts two is four; the number of reciprocating lead screws is four; the number of threaded blocks is four; the number of triangular push blocks one is four; the number of hydraulic blocks one is four; the number of support frames is four; the number of water outlets is four; the number of water inlet pipes is four; the number of hydraulic blocks two is four; the number of fixed slide grooves is eight, with every two fixed slide grooves forming a group; the number of push blocks one is four; the number of springs one is one; the number of sliders is four; and the number of water curtain plates is four.

[0008] Preferably, the squeeze drainage assembly includes a second hose, a third hose, an arc-shaped fixing plate, a third hydraulic block, a second push block, a second spring, a second opening fixing block, and a second roller. The top of the first hydraulic block is fixedly connected to one end of the second hose, and the other end of the second hose is fixedly connected to the rear side of the left-side third hydraulic block. The top of the first hydraulic block is fixedly connected to one end of the third hose, and the other end of the third hose is fixedly connected to the rear side of the right-side third hydraulic block. An arc-shaped fixing plate is fixedly connected to the rear side of the threaded block. The two ends of the arc-shaped fixing plate are fixedly connected to the third hydraulic block. A second push block is movably connected to the front side of the third hydraulic block. An second opening fixing block is fixedly connected to the front side of the second push block. A second spring is fixedly connected between the second opening fixing block and the arc-shaped fixing plate. A second roller is movably connected inside the second opening fixing block. The squeeze drainage component is set up so that when the first roller squeezes the absorbent sponge layer from top to bottom, the water will gradually accumulate at the bottom of the absorbent sponge layer. When the first roller moves to the bottom, the second roller moves inward so that the water at the bottom of the absorbent sponge layer is squeezed out as much as possible, so that the next cycle filtration process can proceed smoothly.

[0009] Preferably, the number of hoses 2 is four, the number of hoses 3 is two, the number of arc-shaped fixing plates is four, the number of hydraulic blocks 3 is eight, with each pair of hydraulic blocks 3 forming a group, the number of push blocks 2 is eight, the number of springs 2 is eight, the number of opening fixing blocks 2 is eight, and the number of rollers 2 is eight.

[0010] Preferably, the side of the second opening fixing block is tangent to the outer side of the absorbent sponge layer.

[0011] Preferably, the anti-clogging component includes a triangular push block two, a hydraulic block four, a hose four, a hydraulic block five, and a push rod. The hydraulic block four is fixedly connected to the inner wall of the outer casing. The triangular push block two is movably connected to the inner side of the hydraulic block four. The bottom of the hydraulic block four is fixedly connected to one end of the hose four, and the other end of the hose four is fixedly connected to the top of the hydraulic block five. The bottom of the dust discharge pipe is fixedly connected to the hydraulic block five, and the bottom of the hydraulic block five is movably connected to the push rod. By providing the anti-clogging component, when the arc-shaped fixed plate moves downward, the push rod moves up and down, thereby pushing the sand and gravel inside the dust discharge pipe, preventing clogging and improving equipment efficiency.

[0012] Preferably, there are two triangular push blocks, each of which is symmetrically distributed about the center line of the outer shell; there are two hydraulic blocks, two hoses, two hydraulic blocks; there are eight push rods, with four push rods forming a group.

[0013] Preferably, the interior of the hydraulic block four is connected to the interior of the hydraulic block five via a hose four.

[0014] This invention provides a purification device for natural gas wellheads. It has the following beneficial effects: (1) The purification equipment used at the natural gas wellhead rotates shaft one, and cooperates with gear one, gear two, shaft two, reciprocating screw, threaded block, opening fixing block one, roller one, triangular push block one, hydraulic block one, hose one, hydraulic block two, push block one, slider, and water curtain plate to form a water curtain, thereby improving the equipment's filtration efficiency.

[0015] (2) When the internal pressure of the hydraulic block increases, the roller 2 is pressed against the bottom of the water-absorbing sponge layer in conjunction with the hose 2, hose 3, hydraulic block 3, push block 2, and opening fixing block 2, so that the water in the water-absorbing sponge layer is discharged as much as possible, so that the next cycle filtration process can proceed smoothly.

[0016] (3) When the threaded block moves downward, it works with the triangular push block 2, hydraulic block 4, hose 4, and hydraulic block 5 to make the push rod move up and down, thereby causing the sand and gravel in the dust discharge pipe to be moved by the push rod, thus avoiding blockage inside the dust discharge pipe and improving the working efficiency of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the present invention; Figure 3 This is a schematic diagram of some of the components of the present invention; Figure 4 This is a schematic diagram of another component structure of the present invention; Figure 5 This is a schematic diagram of the extrusion drainage component structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the anti-clogging component structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B.

[0018] In the picture: 100. Outer shell; 200. Air inlet; 300. Exhaust outlet; 400. Gravel filter; 500. Rotating shaft 1; 600. Dust exhaust pipe; 700. Absorbent sponge layer; 800. Drain pipe; 901. Gear 1; 902. Gear 2; 903. Shaft 2; 904. Reciprocating Screw; 905. Threaded Block; 906. Opening Fixing Block 1; 907. Roller 1; 908. Triangular Push Block 1; 909. Hydraulic Block 1; 910. Hose 1; 911. Support Frame; 912. Water Tank; 913. Water Outlet; 914. Water Inlet Pipe; 915. Hydraulic Block 2; 916. Fixed Slide; 917. Push Block 1; 918. Spring 1; 919. Sliding Block; 920. Water Curtain Plate; 1000. Extrusion drainage assembly; 1001. Hose 2; 1002. Hose 3; 1003. Arc-shaped fixing plate; 1004. Hydraulic block 3; 1005. Push block 2; 1006. Spring 2; 1007. Opening fixing block 2; 1008. Roller 2; 1100 Anti-blocking component; 1101 Triangular push block two; 1102 Hydraulic block four; 1103 Hose four; 1104 Hydraulic block five; 1105 Push rod. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1, please refer to Figures 1-4 A purification device for natural gas wellheads, comprising: The outer casing 100 has an air inlet 200 fixedly connected to its bottom and exhaust outlets 300 fixedly connected to both sides. A gravel filter 400 is fixedly connected inside the outer casing 100 to trap gravel within the extracted natural gas. A rotating shaft 500 is rotatably connected inside the outer casing 100. A dust discharge pipe 600 is fixedly connected to the bottom of the outer casing 100 to discharge the filtered gravel from the equipment. A water-absorbing sponge layer 700 is fixedly connected to the outside of the gravel filter 400 to absorb moisture mixed in the natural gas. A drain pipe 800 is fixedly connected to the bottom of the outer casing 100. 800, the water absorbed by the absorbent sponge layer 700 is discharged by the equipment; the outer side of the threaded block 905 is fixedly connected to the squeeze drainage component 1000; the bottom of the dust discharge pipe 600 is fixedly connected to the anti-clogging component 1100; the outer side of the rotating shaft 500 is fixedly connected to the gear 901; multiple rotating shafts 903 are movably connected inside the outer casing 100; the outer side of the rotating shaft 903 is fixedly connected to the gear 902; the gear 901 meshes with the gear 902; the bottom of the rotating shaft 903 is fixedly connected to the reciprocating screw 904; the outer side of the reciprocating screw 904 is threadedly connected to the threaded block 905; the inner side of the threaded block 905 is fixedly connected to the open fixing block 906; the inner side of the open fixing block 906 is rotatably connected to the roller 907; the outer casing 10 A hydraulic block 909 is fixedly connected to the side wall surface of the housing 100. A triangular push block 908 is movably connected to the inner side of the hydraulic block 909. The hydraulic block 909 is movably connected to the water curtain plate 920 through a transmission component, which includes a hose 910, a support frame 911, a water tank 912, a water outlet 913, a water inlet pipe 914, a hydraulic block 915, a fixed slide 916, a push block 917, a spring 918, and a slider 919. Multiple support frames 911 are fixedly connected to the bottom of the housing 100. A water tank 912 is fixedly connected to the top of the support frame 911. A water outlet 913 is opened at the bottom of the water tank 912. A water inlet pipe 914 is fixedly connected to the bottom of the water tank 912. The bottom of the hydraulic block 909 is fixedly connected to one end of the hose 910. The other end of pipe 910 is fixedly connected to the side of hydraulic block 915. Hose 910 is provided to allow communication between the interior of hydraulic block 909 and hydraulic block 915. A fixed groove 916 is fixedly connected to the bottom of water tank 912. Hydraulic block 915 is fixedly connected to the rear side of fixed groove 916. Push block 917 is movably connected to the front side of hydraulic block 915. Spring 918 is fixedly connected between slider 919 and hydraulic block 915. Spring 918 allows push block 917 to automatically reset. Slider 919 is fixedly connected to the front side of push block 917. Water curtain plate 920 is fixedly connected to the bottom of slider 919. Both ends of slider 919 are slidably connected to fixed groove 916. There are four gears 902.Each gear 902 is distributed around the center of the outer casing 100. There are four rotating shafts 903, four reciprocating lead screws 904, four threaded blocks 905, four triangular push blocks 908, four hydraulic blocks 909, four support frames 911, four water outlets 913, four water inlet pipes 914, four hydraulic blocks 915, eight fixed slides 916 (two fixed slides 916 form a group), four push blocks 917, one spring 918, and a number of sliders 919. There are four water curtain plates 920. The system includes four water curtain plates 920 and rollers 907. During filtration, water flows out from the outlet 913 and forms a water curtain through contact with the water curtain plates 920. This allows the upward-blown natural gas to come into contact with the water curtain, absorbing the fine sand and gravel mixed in. Simultaneously, the moisture mixed in the natural gas is absorbed by the absorbent sponge layer 700. The rollers 907 then move up and down, squeezing out the moisture from the absorbent sponge layer 700, thus achieving a recycling effect. This also accelerates the filtration efficiency, preventing high pressure caused by low filtration efficiency and extending the equipment's service life.

[0021] In use, start the equipment to rotate shaft 500, which in turn rotates gear 901 and gear 902, causing shaft 903 to rotate and reciprocating screw 904 to rotate. This causes threaded block 905 to move up and down along reciprocating screw 904, which in turn causes opening fixing block 906 to drive roller 907 to squeeze water-absorbing sponge layer 700 up and down. This allows the water mixed in the natural gas to be absorbed by the water-absorbing sponge layer 700, and then squeezed out by the up and down movement of roller 907. When threaded block 905 moves downward, triangular push block 908 moves outward, causing hydraulic block 909 to move inward. The increased pressure causes the internal pressure of hydraulic block 909 to be transmitted to hydraulic block 915 through hose 910, which in turn causes push block 917 to move outward, slider 919 to move outward, and water curtain plate 920 to move outward along with slider 919. At this time, water is injected into water tank 912 through water inlet pipe 914, and the water flows out from outlet 913, so that the water flows into contact with water curtain plate 920 to form a water curtain. This allows the upward-blown natural gas to come into contact with the water curtain, thereby absorbing the mixed fine sand and gravel, accelerating the equipment's filtration efficiency, avoiding high pressure caused by low filtration efficiency, and thus extending the equipment's service life.

[0022] Example 2, please refer to Figures 1-6Based on Embodiment 1, the squeeze drainage assembly 1000 includes a second hose 1001, a third hose 1002, an arc-shaped fixing plate 1003, a third hydraulic block 1004, a second push block 1005, a second spring 1006, a second opening fixing block 1007, and a second roller 1008. The top of the first hydraulic block 909 is fixedly connected to one end of the second hose 1001, and the other end of the second hose 1001 is fixedly connected to the rear side of the left-side third hydraulic block 1004. The top of the first hydraulic block 909 is fixedly connected to one end of the third hose 1002, and the other end of the third hose 1002... A hose 1002 is fixedly connected to the rear side of the right-side hydraulic block 3 1004, allowing the interior of hydraulic block 1 909 to communicate with the interior of hydraulic block 3 1004. An arc-shaped fixing plate 1003 is fixedly connected to the rear side of the threaded block 905, allowing two open fixing blocks 1007 to move up and down with the threaded block 905. Hydraulic block 3 1004 is fixedly connected to both ends of the arc-shaped fixing plate 1003. A push block 1005 is movably connected to the front side of hydraulic block 3 1004, and an open fixing block 2 is fixedly connected to the front side of push block 1005. 1007, the side of the second opening fixing block 1007 is tangent to the outer side of the absorbent sponge layer 700. A spring 1006 is fixedly connected between the second opening fixing block 1007 and the arc-shaped fixing plate 1003. The spring 1006 allows the second opening fixing block 1007 to automatically reset. A roller 1008 is movably connected inside the second opening fixing block 1007. There are four hoses 1001, two hoses 1002, four arc-shaped fixing plates 1003, and eight hydraulic blocks 1004. Each pair of hydraulic blocks... Group 3 consists of 1004, eight push blocks 2 1005, eight springs 2 1006, eight opening fixing blocks 2 1007, and eight rollers 2 1008. A squeezing drainage assembly 1000 is set up so that when roller 1 907 squeezes the water-absorbing sponge layer 700 from top to bottom, water will gradually accumulate at the bottom of the water-absorbing sponge layer 700. When roller 1 907 moves to the bottom, roller 2 1008 moves inward so that the water at the bottom of the water-absorbing sponge layer 700 is squeezed out as much as possible, so that the next cycle filtration process can proceed smoothly.

[0023] In use, based on Example 1, when the internal pressure of hydraulic block 909 increases, the excess pressure inside hydraulic block 909 is transmitted to the left hydraulic block 1004 through hose 1001, and to the right hydraulic block 1004 through hose 1002. This increases the internal pressure of hydraulic block 1004, causing push block 1005 to push inward. This causes opening fixing block 1007 to move roller 1008 inward, increasing the squeezing force of roller 1008 on the absorbent sponge layer 700. When roller 907 squeezes the absorbent sponge layer 700 from top to bottom, water gradually accumulates at the bottom of the absorbent sponge layer 700. When roller 907 moves to the bottom, roller 1008 moves inward, squeezing out as much water as possible from the bottom of the absorbent sponge layer 700, thus ensuring the smooth progress of the next filtration cycle.

[0024] Example 3, please refer to Figures 1-8 Based on Embodiments 1 and 2, the anti-blocking component 1100 includes a triangular push block 2 1101, a hydraulic block 4 1102, a hose 4 1103, a hydraulic block 5 1104, and a push rod 1105. The hydraulic block 4 1102 is fixedly connected to the inner wall of the outer shell 100. The triangular push block 2 1101 is movably connected to the inner side of the hydraulic block 4 1102. The bottom of the hydraulic block 4 1102 is fixedly connected to one end of the hose 4 1103, and the other end of the hose 4 1103 is fixedly connected to the top of the hydraulic block 5 1104. The interior of the hydraulic block 4 1102 communicates with the interior of the hydraulic block 5 1104 through the hose 4 1103. The bottom of the dust discharge pipe 600 is fixedly connected to the hydraulic block 5 1104, and the bottom of the hydraulic block 5 1104 is movably connected to... There is a push rod 1105, which is set to prevent mud and gravel inside the dust discharge pipe 600 from clogging it. There are two triangular push blocks 1101, each of which is symmetrically distributed about the center line of the outer shell 100. There are two hydraulic blocks 1102, two hoses 1103, two hydraulic blocks 1104, and eight push rods 1105. Every four push rods 1105 form a group. An anti-clogging component 1100 is set. When the arc-shaped fixing plate 1003 moves downward, the push rods 1105 move up and down, thereby pushing the gravel inside the dust discharge pipe 600 and preventing the dust discharge pipe 600 from clogging, thus improving the working efficiency of the equipment.

[0025] In use, based on Embodiment 1 and Embodiment 2, when the equipment is started, the arc-shaped fixing plate 1003 moves downward with the threaded block 905, causing the triangular push block 2 1101 to move outward, increasing the internal pressure of the hydraulic block 4 1102. The internal pressure of the hydraulic block 4 1102 is transmitted to the hydraulic block 5 1104 through the hose 4 1103, increasing the internal pressure of the hydraulic block 5 1104, causing the push rod 1105 to be pushed downward, pushing the sand and gravel inside the dust discharge pipe 600, thereby preventing the dust discharge pipe 600 from becoming blocked, thus improving the working efficiency of the equipment.

[0026] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A purification apparatus for a natural gas wellhead, characterized by, Include: The bottom of the shell is fixedly connected with the air inlet, the two sides of the shell are fixedly connected with the exhaust port, the inside of the shell is fixedly connected with the gravel filter screen, and the inside of the shell is rotatably connected with the rotating shaft one. The outside of the rotating shaft one is fixedly connected with the gear one, a plurality of rotating shaft two are movably connected in the inside of the shell, the outside of the rotating shaft two is fixedly connected with the gear two, the gear one is engaged with the gear two, the bottom of the rotating shaft two is fixedly connected with the reciprocating screw rod, the outside of the reciprocating screw rod is threadedly connected with the threaded block, the inside of the threaded block is fixedly connected with the open fixed block one, the inside of the open fixed block one is rotatably connected with the roller one, the surface of the side wall of the shell is fixedly connected with the hydraulic block one, the inside of the hydraulic block one is movably connected with the triangular push block one, and the hydraulic block one is movably connected with the water curtain plate through the transmission part.

2. A purification apparatus for a natural gas wellhead according to claim 1, characterized in that: The transmission part includes a hose one, a support frame, a water tank, a water outlet, an inlet pipe, a hydraulic block two, a fixed sliding groove, a push block one, a spring one and a sliding block. The bottom of the shell is fixedly connected with a plurality of support frames, the top of the support frame is fixedly connected with the water tank, the bottom of the water tank is provided with a water outlet, the bottom of the water tank is fixedly connected with the inlet pipe, one end of the hose one is fixedly connected with the bottom of the hydraulic block one, the other end of the hose one is fixedly connected with the side of the hydraulic block two, the bottom of the water tank is fixedly connected with the fixed sliding groove, the rear side of the fixed sliding groove is fixedly connected with the hydraulic block two, the front side of the hydraulic block two is movably connected with the push block one, the spring one is fixedly connected between the sliding block and the hydraulic block two, the front side of the push block one is fixedly connected with the sliding block, the bottom of the sliding block is fixedly connected with the water curtain plate, and the two ends of the sliding block are slidably connected with the fixed sliding groove.

3. A purification apparatus for a natural gas wellhead according to claim 1, characterized in that: The bottom of the shell is fixedly connected with a dust removal pipe, the outside of the gravel filter screen is fixedly connected with a water absorption sponge layer, the bottom of the shell is fixedly connected with a drain pipe, the outside of the threaded block is fixedly connected with an extrusion drainage assembly, and the bottom of the dust removal pipe is fixedly connected with a anti-blocking assembly.

4. A purification apparatus for a natural gas wellhead according to claim 1, characterized in that: The number of the gear two is four, each gear two is distributed around the circumference of the shell center, the number of the rotating shaft two is four, the number of the reciprocating screw rod is four, the number of the threaded block is four, the number of the triangular push block one is four, the number of the hydraulic block one is four, the number of the support frame is four, the number of the water outlet is four, the number of the inlet pipe is four, the number of the hydraulic block two is four, the number of the fixed sliding groove is eight, every two fixed sliding grooves are a group, the number of the push block one is four, the number of the spring one is one, the number of the sliding block is four, and the number of the water curtain plate is four.

5. A purification apparatus for a natural gas wellhead according to claim 3, characterized in that: The extrusion drainage assembly includes a second hose, a third hose, an arc-shaped fixed plate, a third hydraulic block, a second push block, a second spring, a second opening fixed block, and a second roller.

6. A purification apparatus for a natural gas wellhead according to claim 5, characterized in that: The number of the second hose is four, the number of the third hose is two, the number of the arc-shaped fixed plate is four, the number of the third hydraulic block is eight, every two of the third hydraulic blocks are a group, the number of the second push block is eight, the number of the second spring is eight, the number of the second opening fixed block is eight, and the number of the second roller is eight.

7. A purification apparatus for a natural gas wellhead according to claim 5, characterized in that: The side surface of the second opening fixed block is tangent to the outside of the water absorption sponge layer.

8. A purification apparatus for a natural gas wellhead according to claim 5, characterized in that: The anti-blocking assembly includes a second triangular push block, a fourth hydraulic block, a fourth hose, a fifth hydraulic block, and a push rod.

9. A purification apparatus for a natural gas wellhead according to claim 8, characterized in that: The number of the second triangular push block is two, every second triangular push block is symmetrically distributed about the center line of the shell, the number of the fourth hydraulic block is two, the number of the fourth hose is two, the number of the fifth hydraulic block is two, and the number of the push rod is eight, every four of the push rods are a group.

10. A purification apparatus for a natural gas wellhead according to claim 8, characterized in that: The inside of the fourth hydraulic block is communicated with the inside of the fifth hydraulic block through the fourth hose.

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