Wellhead continuous type natural gas desanding separation equipment and method

Abstract

The invention relates to the technical field of natural gas treatment equipment, in particular to wellhead continuous type natural gas desanding separation equipment and method.The wellhead continuous type natural gas desanding separation equipment comprises a separation barrel, the outer wall of the separation barrel is provided with a wellhead gas conveying pipe in a communicating mode, and the outer wall of the separation barrel is fixedly connected with a gas outlet pipe. When the natural gas with sand enters the conical separation box, due to the fact that the natural gas is guided by the flow guide spiral rotating plate, linear motion of airflow is changed into circular motion, most of the rotating airflow moves downwards spirally along the wall of the device and flows towards the bottom of a cone, and the sand is separated from the natural gas through the flow guide spiral rotating plate. The dust-containing natural gas generates centrifugal force in the rotating process, particles with the density larger than that of the natural gas are thrown to the inner wall of the conical separation box, once the sand grains make contact with the inner wall of the conical separation box, the sand grains lose inertia force and fall down along the wall by means of the gravity of the sand grains, and the falling sand grains are discharged to the position above the filter plate through the sand discharging pipeline.

Description

Technical Field

[0001] This application relates to the technical field of natural gas processing equipment. Specifically, it relates to a wellhead continuous natural gas sand removal and separation equipment and method. Background Art

[0002] In the related art, with the continuous update of natural gas extraction technology and the continuous breakthrough of drilling depth from deep wells to ultra-deep wells, especially the hydraulic fracturing technology used in unconventional natural gas extraction, a large amount of particulate matter and formation sand are carried in the produced natural gas, and the pressure is relatively high, and the gas flow rate is relatively fast, so that the moving speed of the sand particles is also relatively fast.

[0003] In the prior art (a patent application with the publication number CN112523738B and the patent name of a natural gas hydrate separation equipment and process), different cavities are separated by a partition, and the recovery of each phase does not interfere with each other. The structure is simple and reliable, and the cyclone separation characteristics are fully utilized. It can not only adapt to different processing capacities, has good operating flexibility, is convenient for sand discharge, but also can effectively recover some decomposed natural gas, solving the problems of low gas-phase recovery efficiency of the separation equipment in the prior art, the formation of gas slugs by natural gas staying in the cyclone cavity, and difficult sand discharge. In the process of implementing this technical solution, it is found that at least the following problems exist in the prior art: In the existing sand removal and separation equipment, due to the impact of sand and gravel on the spiral separation pipe, sand and gravel and natural gas residues remain on the spiral separation pipe for a long time. Under the impact of sand and gravel and natural gas, the wear of the spiral separation pipe will be accelerated, affecting the service life. Therefore, during use, the surface of the spiral separation pipe needs to be treated regularly. Due to a certain amount of moisture in natural gas, when removing sand and separating natural gas, there will be moisture and dust impurities in the device, and the mixed dust will adhere to the sand discharge port, thus making the sand discharge channel narrow, the sand discharge difficult, and the pipeline easy to be blocked for a long time. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems in the prior art that the mixed dust will adhere to the sand discharge port, thus making the sand discharge channel narrow, the sand discharge difficult, and the pipeline easy to be blocked for a long time. For this reason, this application proposes a wellhead continuous natural gas sand removal and separation equipment and method.

[0005] According to an embodiment of this application, a wellhead continuous natural gas sand removal and separation equipment and method includes a separation cylinder. An inlet gas pipe of the wellhead is connected to the outer wall of the separation cylinder in a communicating manner. An outlet gas pipe is fixedly connected to the outer wall of the separation cylinder. An outlet gas fan is fixedly connected to the end of the outlet gas pipe far away from the separation cylinder. It further includes: Separation mechanism, the separation mechanism includes a fixing bracket fixedly connected to the outer wall of the separation cylinder, a cleaning liquid storage cylinder is fixedly connected to the side wall of the fixing bracket, a liquid adding pipe is communicated with the outer wall of the cleaning liquid storage cylinder, a liquid suction pipe is fixedly connected to the bottom end of the cleaning liquid storage cylinder, and one end of the liquid suction pipe penetrates through the outer wall of the separation cylinder and extends to the inside; Separation component, the separation component includes a conical separation box fixedly connected to the outer wall of the wellhead gas transmission pipe, a separation pipe is arranged at the central axis of the top of the conical separation box, the top end of the separation pipe penetrates through the inner wall of the conical separation box and extends to the outside, a guide spiral rotating plate is fixedly connected to the outer wall of the separation pipe, and the guide spiral rotating plate is located inside the conical separation box.

[0006] Preferably, the separation mechanism further includes a liquid suction pipe fixedly connected to the top end of the cleaning liquid storage cylinder, a water pump is fixedly connected to the end of the liquid suction pipe away from the cleaning liquid storage cylinder, a drain pipe is fixedly connected to the drainage end of the water pump, a liquid storage cavity is opened inside the separation cylinder, one end of the drain pipe penetrates through the top of the separation cylinder and extends into the liquid storage cavity, and a pressurized spray head is fixedly connected to the inner wall of the liquid storage cavity.

[0007] Preferably, the separation component further includes a separation cylinder fixedly connected to the inner wall of the separation cylinder, the top end of the separation pipe penetrates through the bottom of the separation cylinder and extends to the inside, a separation baffle is fixedly connected to the inner wall of the separation cylinder, the bottom end of the pressurized spray head penetrates through the top of the separation cylinder and extends to the inside, a connecting pipe is communicated with the bottom of the separation cylinder, a liquid outlet is opened on the outer wall of the connecting pipe, the liquid outlet is located inside the conical separation box, a U-shaped pipe is communicated with the outer wall of the separation cylinder, and one end of the U-shaped pipe penetrates through the outer wall of the separation cylinder and extends to the inside.

[0008] Preferably, a sand discharge pipe is fixedly connected to the bottom of the conical separation box, one end of the sand discharge pipe away from the conical separation box penetrates through the outer wall of the separation cylinder and extends to the inside, and a one-way valve is arranged on the outer wall of the sand discharge pipe.

[0009] Preferably, a reciprocating mechanism is arranged on the outer wall of the separation cylinder, the reciprocating mechanism includes a fixing bracket fixedly connected to the outer wall of the separation cylinder, a servo motor is fixedly connected to the inner wall of the fixing bracket, a rotating rod is fixedly connected to the output end of the servo motor, the rotating rod penetrates through the outer wall of the separation cylinder and extends to the inside, a disc is arranged on the side wall of the rotating rod, a fixing shaft is fixedly connected to the side wall of the disc, a push-pull plate is rotatably connected to the outer wall of the fixing shaft, a push-pull rod is rotatably connected to the end of the push-pull plate away from the fixing shaft, a sliding air suction cylinder is fixedly connected to one end of the push-pull rod, and the outer wall of the sliding air suction cylinder is slidably connected to the inner wall of the air outlet pipe.

[0010] Preferably, a limiting frame is fixedly connected to the outer wall of the sliding suction cylinder. A sliding rod is slidably connected to the inner wall of the limiting frame. A connecting seat is fixedly connected to the outer wall of the sliding rod. A lifting support plate is fixedly connected to the bottom of the connecting seat. A separation membrane is fixedly connected to the inner wall of the lifting support plate. One end of the separation membrane away from the lifting support plate is fixedly connected to the outer wall of the sliding suction cylinder.

[0011] Preferably, a fixing plate is fixedly connected to the inner wall of the separation cylinder. A reciprocating plate is fixedly connected to the side wall of the fixing plate. A reciprocating groove is formed in the side wall of the reciprocating plate. A lifting rod is slidably connected to the inner wall of the reciprocating groove. One end of the lifting rod away from the reciprocating groove is fixedly connected to the side wall of the connecting seat.

[0012] Preferably, a water spraying mechanism is arranged at the top of the lifting support plate. The water spraying mechanism includes an L-shaped push-pull frame fixedly connected to the top of the lifting support plate. A convex sliding plate is slidably connected to the side wall of the L-shaped push-pull frame. A liquid spraying tank is fixedly connected to the side wall of the convex sliding plate. A liquid inlet pipe is communicated with the side wall of the liquid spraying tank. A fixing support plate is fixedly connected to the inner wall of the separation cylinder. A suction pipe is fixedly connected to the inner wall of the fixing support plate.

[0013] Preferably, a suction component is arranged inside the suction pipe. The suction component includes a suction hollow rod slidably connected to the central axis of the bottom of the suction pipe. One end of the outer wall of the suction hollow rod is communicated with one end of the liquid inlet pipe. A fixing disc is fixedly connected to the outer wall of the suction hollow rod. A suction port is formed in the outer wall of the suction hollow rod. A piston is arranged on the outer wall of the suction hollow rod. The outer wall of the piston is slidably connected to the inner wall of the suction pipe. The top end of the suction hollow rod is fixedly connected to a connecting cylinder. A spring is fixedly connected to the inner wall of the connecting cylinder. One end of the spring away from the connecting cylinder is fixedly connected to a glass ball. A suction pipeline is fixedly connected to the inner wall of the suction pipe. One end of the suction pipeline penetrates through the outer wall of the cleaning liquid storage cylinder and extends to the inside.

[0014] Preferably, a usage method of a wellhead continuous natural gas sand removal and separation device includes the following steps: S1: The wellhead gas transmission pipe is connected to the wellhead. The air outlet fan is started. The air outlet fan sucks out the treated natural gas through the air outlet pipe. When the sand-carrying natural gas enters the conical separation box, due to the guiding of the natural gas by the guiding spiral rotating plate, the particles with a density greater than that of the natural gas are thrown towards the inner wall of the conical separation box. The sand particles that fall are discharged into the upper part of the filter plate through the sand discharge pipe. When the rotating and descending outer swirling air flow reaches the bottom end of the separation pipe, the natural gas moves upward along the separation pipe and enters the separation cylinder. S2: Add an appropriate amount of cleaning water into the cleaning liquid storage cylinder through the liquid adding pipe. Start the water pump. The water pump sucks the liquid in the cleaning liquid storage cylinder into the drain pipe through the liquid suction pipe. The drain pipe discharges the cleaning liquid into the liquid storage cavity, and the separation baffle is cleaned through the pressure spray head. S3: When the natural gas after cleaning the separation component is discharged from the U-shaped pipe into the separation cylinder, the air outlet pipe sucks air with the sliding suction cylinder. The servo motor drives the rotating rod to rotate. The rotating rod drives the disc and the fixed shaft to move. The fixed shaft drives the push rod to move through the push-pull plate. Since the sliding suction cylinder slides in the air outlet pipe, the push rod can drive the sliding suction cylinder to perform reciprocating lateral movement. The sliding suction cylinder drives the limit frame to move. The limit frame drives the sliding rod and the connecting seat to move. The connecting seat slides in the reciprocating groove through the lifting rod, so that the connecting seat performs lifting movement while moving laterally. The connecting seat oscillates the separation membrane through the lifting support plate. S4: The lifting support plate pulls the liquid spraying box to perform reciprocating lifting through the L-shaped push-pull frame and the convex sliding plate. The liquid spraying box drives the liquid inlet pipe to move. Water is sucked through the reciprocating movement of the suction component. The sucked water is discharged from the liquid inlet pipe into the liquid spraying box, and the liquid spraying box cleans the separation membrane.

[0015] The beneficial effects of this application are: 1. For this wellhead continuous natural gas sand removal and separation equipment and method, the wellhead gas transmission pipe is connected to the wellhead. The air outlet fan is started. The air outlet fan sucks out the treated natural gas through the air outlet pipe. When the sand-carrying natural gas enters the conical separation box, due to the guiding of the natural gas by the guide spiral plate, the air flow changes from linear motion to circular motion. Most of the rotating air flow moves along the wall in a spiral downward direction towards the bottom of the cone. The centrifugal force is generated during the rotation of the dusty natural gas, and the particles with a density greater than that of natural gas are thrown towards the inner wall of the conical separation box. Once the sand grains come into contact with the inner wall of the conical separation box, they lose the inertial force and fall along the wall by the gravity of the sand grains themselves. The fallen sand grains are discharged into the upper part of the filter plate through the sand discharge pipe. When the rotating downward outer spiral air flow reaches the bottom end of the separation pipe, since the density of natural gas is lower than that of air, the natural gas moves upward along the separation pipe into the separation cylinder. During the flow of natural gas, due to the inclination of the separation baffle, the flow direction of the natural gas air flow changes, so that the flowing natural gas drives the dust and moisture with greater inertia, which will collide with the separation baffle, causing the dust and a large amount of moisture to be separated from the natural gas. The dust and water droplets will then pass through the connecting pipe and be discharged from the liquid outlet into the conical separation box, thereby separating a large amount of liquid and large-diameter dust in the natural gas and realizing the separation of sand and natural gas.

[0016] 2. The wellhead continuous natural gas sand removal and separation equipment and method add appropriate cleaning water into the cleaning liquid storage cylinder through the liquid adding pipe, start the water pump, the water pump sucks the liquid in the cleaning liquid storage cylinder into the drain pipe through the liquid suction pipe, the drain pipe discharges the cleaning liquid into the liquid storage cavity, and cleans the separation baffle through the pressure spray head. At the same time, the water sprayed by the pressure spray head can be mixed with the moisture in the natural gas, thereby reducing the moisture in the natural gas. The cleaning water is discharged into the conical separation box through the connecting pipe to clean it, avoiding the accumulation of impurities at the outlet of the conical separation box and affecting the overall separation operation. The cleaning water drives the impurities to be discharged onto the filter plate, the filter plate filters the impurities, and the filtered cleaning water is sucked into the cleaning liquid storage cylinder through the liquid suction pipe for reuse, saving a large amount of water resources.

[0017] 3. The wellhead continuous natural gas sand removal and separation equipment and method, when the natural gas after the separation component is cleaned is discharged into the separation cylinder from the U-shaped pipe, the air outlet pipe sucks air with the sliding suction cylinder, which can enable the separation membrane to purify the natural gas for the second time. The servo motor drives the rotating rod to rotate, the rotating rod drives the disc and the fixed shaft to move, the fixed shaft pulls the push rod through the push-pull plate to move. Since the sliding suction cylinder slides in the air outlet pipe, the push rod can drive the sliding suction cylinder to move horizontally back and forth. The sliding suction cylinder drives the limit frame to move, the limit frame drives the slide rod and the connecting seat to move, the connecting seat slides in the reciprocating groove through the lifting rod, so that the connecting seat moves vertically while moving horizontally. The connecting seat makes the separation membrane oscillate through the lifting support plate, facilitating the rapid falling of the sand and gravel on the separation membrane under vibration, avoiding the blockage of the separation membrane, and improving the cleaning efficiency.

[0018] 4. The wellhead continuous natural gas sand removal and separation equipment and method, when the lifting support plate moves up and down reciprocally, the lifting support plate pulls the liquid spraying box to move up and down reciprocally through the L-shaped push-pull frame and the convex slide plate. The liquid spraying box drives the liquid inlet pipe to move. When the hollow suction rod descends, the hollow suction rod drives the connecting cylinder to descend. Because the friction between the piston and the suction pipe is greater than the friction between the hollow suction rod and the piston, only the connecting cylinder can pull the piston. When the piston contacts the connecting cylinder, the piston blocks the suction port, thereby forming a negative pressure on the piston. During the continued descent, the glass ball releases the restriction on the water inlet at the top of the suction pipe. During the descent of the piston, the cleaning water in the cleaning liquid storage cylinder enters the suction pipe through the suction pipeline under negative pressure. When the liquid inlet pipe drives the hollow suction rod to rise, the glass ball blocks the water inlet at the top of the suction pipe, and the hollow suction rod pushes the piston to continue rising through the fixed disc. The piston squeezes the liquid entering the suction pipe. During the squeezing process, the liquid is discharged into the hollow suction rod through the suction port and discharged into the liquid spraying box from the liquid inlet pipe. The liquid spraying box cleans the separation membrane, further improving the service life of the device, eliminating the need for manual replacement, and making the operation more convenient.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present application. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic perspective view of the overall three-dimensional structure according to an embodiment of the present application; Figure 2 is a schematic view of the internal structure of the separation cylinder according to an embodiment of the present application; Figure 3 is a schematic view of the structure of the separation mechanism according to an embodiment of the present application; Figure 4 is a sectional view of the structure of the separation component according to an embodiment of the present application; Figure 5 is a sectional view of the structure of the air outlet pipe according to an embodiment of the present application; Figure 6 is a sectional view of the structure of the reciprocating mechanism according to an embodiment of the present application; Figure 7 is according to an embodiment of the present application Figure 6 enlarged view at A in; Figure 8 is a schematic view of the structure of the suction pipe according to an embodiment of the present application; Figure 9 is a schematic perspective view of the overall structure of the water spraying mechanism according to an embodiment of the present application; Figure 10 is a sectional view of the structure of the suction component according to an embodiment of the present application; Figure 11 is a sectional view of the structure of the sand discharging mechanism according to an embodiment of the present application; Figure 12 is a method diagram according to an embodiment of the present application.

[0022] Icons: 101, separation cylinder; 102, wellhead gas transmission pipe; 103, gas outlet pipe; 104, gas outlet fan; 2, separation mechanism; 201, fixing frame; 202, cleaning liquid storage cylinder; 203, liquid adding pipe; 204, liquid suction pipeline; 205, liquid suction pipe; 206, water pump; 207, drain pipe; 208, liquid storage cavity; 209, pressure spray head; 3, separation component; 301, conical separation box; 302, separation pipe; 303, guiding spiral rotating plate; 304, separation cylinder; 305, separation baffle; 306, connecting through pipe; 307, liquid outlet; 308, U-shaped pipe; 309, sand discharge pipeline; 310, check valve; 4, reciprocating mechanism; 401, fixing bracket; 402, servo motor; 403, rotating rod; 404, disc; 405, fixing shaft; 406, push-pull plate; 407, push-pull rod; 408, sliding air suction cylinder; 409, limiting frame; 41, sliding rod; 42, connecting seat; 43, lifting support plate; 44, separation membrane; 45, fixing plate; 46, reciprocating plate; 47, reciprocating groove; 48, lifting rod; 5, water spraying mechanism; 501, L-shaped push-pull frame; 502, convex sliding plate; 503, liquid spraying box; 504, liquid inlet pipe; 505, fixing support plate; 506, suction pipe; 6, suction component; 601, suction hollow rod; 602, fixing disc; 603, piston; 604, suction port; 605, connecting cylinder; 606, spring; 607, glass ball; 609, suction pipeline; 7, sand discharge mechanism; 701, belt; 702, rotating shaft; 703, spiral conveying plate; 704, filter plate; 705, collection box; 706, collection frame. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0024] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

[0027] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the figures. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present application.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0029] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0031] A wellhead continuous natural gas sand removal and separation device and method according to an embodiment of the present application will be described below with reference to the drawings.

[0032] As Figures 1 to 4As shown, a wellhead continuous natural gas sand removal and separation device and method according to an embodiment of the present application includes a separation cylinder 101. An outer wall of the separation cylinder 101 is communicatively connected to a wellhead gas transmission pipe 102. An outer wall of the separation cylinder 101 is fixedly connected to an air outlet pipe 103. One end of the air outlet pipe 103 away from the separation cylinder 101 is fixedly connected to an air outlet fan 104. This is set so that the wellhead gas transmission pipe 102 is connected to the wellhead. When the air outlet fan 104 is started, the air outlet fan 104 sucks out the treated natural gas through the air outlet pipe 103. It further includes: A separation mechanism 2. The separation mechanism 2 includes a fixing frame 201 fixedly connected to an outer wall of the separation cylinder 101. A side wall of the fixing frame 201 is fixedly connected to a cleaning liquid storage cylinder 202. An outer wall of the cleaning liquid storage cylinder 202 is communicatively connected to a liquid adding pipe 203. A bottom end of the cleaning liquid storage cylinder 202 is fixedly connected to a liquid suction pipe 204. One end of the liquid suction pipe 204 penetrates through the outer wall of the separation cylinder 101 and extends into the interior. The separation mechanism 2 further includes a liquid suction pipe 205 fixedly connected to a top end of the cleaning liquid storage cylinder 202. One end of the liquid suction pipe 205 away from the cleaning liquid storage cylinder 202 is fixedly connected to a water pump 206. A drainage end of the water pump 206 is fixedly connected to a drainage pipe 207. This is set so that an appropriate amount of cleaning water is added to the cleaning liquid storage cylinder 202 through the liquid adding pipe 203. When the water pump 206 is started, the water pump 206 sucks the liquid in the cleaning liquid storage cylinder 202 into the drainage pipe 207. The drainage pipe 207 discharges the cleaning liquid into a liquid storage cavity 208. A liquid storage cavity 208 is formed inside the separation cylinder 101. One end of the drainage pipe 207 penetrates through the top of the separation cylinder 101 and extends into the liquid storage cavity 208. An inner wall of the liquid storage cavity 208 is fixedly connected to a pressure spray head 209; Separation component 3, the separation component 3 includes a conical separation box 301 fixedly connected to the outer wall of the wellhead gas transmission pipe 102. At the central axis of the top of the conical separation box 301, a separation pipe 302 is provided. The top end of the separation pipe 302 penetrates the inner wall of the conical separation box 301 and extends to the outside. A guiding spiral rotating plate 303 is fixedly connected to the outer wall of the separation pipe 302. The guiding spiral rotating plate 303 is located inside the conical separation box 301. The separation component 3 further includes a separation cylinder 304 fixedly connected to the inner wall of the separation cylinder 101. This is set so that when the sand-carrying natural gas enters the conical separation box 301, due to the guiding spiral rotating plate 303 guiding the natural gas, the air flow changes from linear motion to circular motion. The top end of the separation pipe 302 penetrates the bottom of the separation cylinder 304 and extends to the inside. A separation baffle 305 is fixedly connected to the inner wall of the separation cylinder 304. The bottom end of the pressurized spray head 209 penetrates the top of the separation cylinder 304 and extends to the inside. A connecting pipe 306 is communicated with the bottom of the separation cylinder 304. A liquid outlet 307 is opened on the outer wall of the connecting pipe 306. The liquid outlet 307 is located inside the conical separation box 301. This is set so that the natural gas moves upward along the separation pipe 302 and enters the separation cylinder 304. During the flow of the natural gas, due to the inclination of the separation baffle 305, the air flow direction of the natural gas changes, making the flowing natural gas drive the dust and moisture with greater inertia, which will collide with the separation baffle 305, causing the dust and a large amount of moisture to be separated from the natural gas. The dust and water droplets will be discharged from the liquid outlet 307 to the conical separation box 301 through the connecting pipe 306, thereby separating a large amount of liquid and large-diameter dust in the natural gas and realizing the separation of sand and natural gas. A U-shaped pipe 308 is communicated with the outer wall of the separation cylinder 304. One end of the U-shaped pipe 308 penetrates the outer wall of the separation cylinder 101 and extends to the inside. This is set so that the natural gas is discharged into the separation cylinder 101 from the U-shaped pipe 308. A sand discharge pipe 309 is fixedly connected to the bottom of the conical separation box 301. The end of the sand discharge pipe 309 away from the conical separation box 301 penetrates the outer wall of the separation cylinder 101 and extends to the inside. A one-way valve 310 is provided on the outer wall of the sand discharge pipe 309. This is set to prevent the natural gas from flowing back.

[0033] Such as Figures 5 to 7As shown in the figure, a reciprocating mechanism 4 is provided on the outer wall of the separation cylinder 101. The reciprocating mechanism 4 includes a fixed bracket 401 fixedly connected to the outer wall of the separation cylinder 101. A servo motor 402 is fixedly connected to the inner wall of the fixed bracket 401. The output end of the servo motor 402 is fixedly connected to a rotating rod 403. The rotating rod 403 penetrates the outer wall of the separation cylinder 101 and extends to the inside. A disc 404 is provided on the side wall of the rotating rod 403. A fixed shaft 405 is fixedly connected to the side wall of the disc 404. A push-pull plate 406 is rotatably connected to the outer wall of the fixed shaft 405. One end of the push-pull plate 406 away from the fixed shaft 405 is rotatably connected to a push-pull rod 407. One end of the push-pull rod 407 is fixedly connected to a sliding suction cylinder 408. The outer wall of the sliding suction cylinder 408 is slidably connected to the inner wall of the air outlet pipe 103. This is set so that the air outlet pipe 103 and the sliding suction cylinder 408 can suck air, enabling the separation membrane 44 to perform secondary purification on natural gas. The servo motor 402 drives the rotating rod 403 to rotate. The rotating rod 403 drives the disc 404 and the fixed shaft 405 to move. The fixed shaft 405 pulls the push-pull rod 407 to move through the push-pull plate 406. Since the sliding suction cylinder 408 slides in the air outlet pipe 103, the push-pull rod 407 can drive the sliding suction cylinder 408 to perform reciprocating lateral movement, and the sliding suction cylinder 408 drives the limit frame 409 to move.

[0034] A limit frame 409 is fixedly connected to the outer wall of the sliding suction cylinder 408. A sliding rod 41 is slidably connected to the inner wall of the limit frame 409. A connecting seat 42 is fixedly connected to the outer wall of the sliding rod 41. A lifting support plate 43 is fixedly connected to the bottom of the connecting seat 42. A separation membrane 44 is fixedly connected to the inner wall of the lifting support plate 43. One end of the separation membrane 44 away from the lifting support plate 43 is fixedly connected to the outer wall of the sliding suction cylinder 408. A fixed plate 45 is fixedly connected to the inner wall of the separation cylinder 101. A reciprocating plate 46 is fixedly connected to the side wall of the fixed plate 45. A reciprocating groove 47 is provided on the side wall of the reciprocating plate 46. A lifting rod 48 is slidably connected to the inner wall of the reciprocating groove 47. One end of the lifting rod 48 away from the reciprocating groove 47 is fixedly connected to the side wall of the connecting seat 42. This is set so that the limit frame 409 drives the sliding rod 41 and the connecting seat 42 to move. The connecting seat 42 slides in the reciprocating groove 47 through the lifting rod 48, enabling the connecting seat 42 to perform lifting movement while performing lateral movement. The connecting seat 42 oscillates the separation membrane 44 through the lifting support plate 43, facilitating the rapid fall of the sand and gravel on the separation membrane 44 under vibration, avoiding the blockage of the separation membrane 44, and improving the cleaning efficiency.

[0035] As Figures 8 to 10As shown in the figure, a water spraying mechanism 5 is provided at the top of the lifting support plate 43. The water spraying mechanism 5 includes an L-shaped push-pull frame 501 fixedly connected to the top of the lifting support plate 43. A convex sliding plate 502 is slidably connected to the side wall of the L-shaped push-pull frame 501. A liquid spraying tank 503 is fixedly connected to the side wall of the convex sliding plate 502. A liquid inlet pipe 504 is communicated with the side wall of the liquid spraying tank 503. A fixed support plate 505 is fixedly connected to the inner wall of the separation cylinder 101. A suction pipe 506 is fixedly connected to the inner wall of the fixed support plate 505.

[0036] A suction component 6 is arranged inside the suction pipe 506. The suction component 6 includes a suction hollow rod 601 slidably connected to the central axis of the bottom of the suction pipe 506. One end of the outer wall of the suction hollow rod 601 is communicated with the liquid inlet pipe 504. A fixed disc 602 is fixedly connected to the outer wall of the suction hollow rod 601. This is set to make the fixed disc 602 pull the piston 603. A suction port 604 is arranged on the outer wall of the suction hollow rod 601. This is set to make the cleaning water enter through the suction port 604. A piston 603 is arranged on the outer wall of the suction hollow rod 601. The outer wall of the piston 603 is slidably connected to the inner wall of the suction pipe 506. The top end of the suction hollow rod 601 is fixedly connected to a connecting cylinder 605. A spring 606 is fixedly connected to the inner wall of the connecting cylinder 605. One end of the spring 606 away from the connecting cylinder 605 is fixedly connected to a glass ball 607. A suction pipeline 609 is fixedly connected to the inner wall of the suction pipe 506. One end of the suction pipeline 609 penetrates through the outer wall of the cleaning liquid storage cylinder 202 and extends to the inside.

[0037] As Figure 11 As shown in the figure, after the existing natural gas desanding and separating equipment completes the sand filtration, it is relatively difficult to take out the sand. It is necessary to stop transporting natural gas and manually disassemble the equipment before the sand can be taken out. It cannot achieve continuous sand removal and cleaning, which is not convenient for users. A sand discharging mechanism 7 is arranged on the outer wall of the rotating rod 403. The sand discharging mechanism 7 includes a belt 701 sleeved on the outer wall of the rotating rod 403. A rotating shaft 702 is drivingly connected to the inner wall of the belt 701. The rotating shaft 702 penetrates through the outer wall of the separation cylinder 101 and extends to the outside. A spiral conveyor plate 703 is fixedly connected to the outer wall of the rotating shaft 702. A filter plate 704 is fixedly connected to the inner wall of the separation cylinder 101. The side wall of the filter plate 704 is in contact with the outer wall of the spiral conveyor plate 703. A collection box 705 is fixedly connected to the outer wall of the separation cylinder 101. A collection frame 706 is detachably arranged inside the collection box 705. When the impurities and water in the natural gas fall onto the filter plate 704, the rotating rod 403 drives the rotating shaft 702 to rotate through the belt 701. The rotating shaft 702 drives the spiral conveyor plate 703 to scrape the filter plate 704. At the same time, the spiral conveyor plate 703 transports the impurities on the filter plate 704, preventing the filter plate 704 from being blocked by dirt, and transporting the impurities into the collection frame 706 in the collection box 705 to collect the impurities, improving the practicability of the device.

[0038] As Figure 12 shown, specifically, the usage method of the continuous natural gas sand removal and separation equipment at the wellhead: During use, the wellhead gas pipeline 102 is connected to the wellhead, and the outlet air blower 104 is started. The outlet air blower 104 sucks out the treated natural gas through the outlet pipe 103. When the sand-carrying natural gas enters the inside of the conical separation box 301, due to the guiding of the natural gas by the guiding spiral plate 303, the air flow changes from linear motion to circular motion. Most of the rotating air flow moves along the wall of the device in a spiral downward direction towards the bottom of the cone. The dust-containing natural gas generates centrifugal force during rotation, throwing the particles with a density greater than that of natural gas towards the inner wall of the conical separation box 301. Once the sand grains come into contact with the inner wall of the conical separation box 301, they lose their inertial force and fall along the wall by the gravity of the sand grains themselves. The fallen sand grains are discharged into the upper part of the filter plate 704 through the sand discharge pipe 309. When the rotating downward outer spiral air flow reaches the bottom end of the separation pipe 302, since the density of natural gas is lower than that of air, the natural gas moves upward along the separation pipe 302 and enters the separation cylinder 304. During the flow of natural gas, due to the inclination of the separation baffle 305, the flow direction of the natural gas air flow changes, making the flowing natural gas drive the dust and moisture with greater inertia, which will collide with the separation baffle 305, causing the dust and a large amount of moisture to be separated from the natural gas. The dust and water droplets will be discharged into the conical separation box 301 through the connecting pipe 306 from the liquid outlet 307, thereby separating a large amount of liquid and large-diameter dust in the natural gas and realizing the separation of sand and natural gas.

[0039] Appropriately add cleaning water from the cleaning liquid storage cylinder 202 through the liquid adding pipe 203. Start the water pump 206. The water pump 206 sucks the liquid in the cleaning liquid storage cylinder 202 into the drain pipe 207 through the liquid suction pipe 205. The drain pipe 207 discharges the cleaning liquid into the liquid storage cavity 208 and cleans the separation baffle 305 through the pressure nozzle 209. At the same time, the water sprayed by the pressure nozzle 209 can be mixed with the moisture in the natural gas, thereby reducing the moisture existing in the natural gas. The cleaning water is discharged into the conical separation box 301 through the connecting pipe 306 to clean it, avoiding the accumulation of impurities at the outlet of the conical separation box 301 and affecting the overall separation operation. The cleaning water drives the impurities onto the filter plate 704. The filter plate 704 filters the impurities and sucks the filtered cleaning water into the cleaning liquid storage cylinder 202 through the liquid suction pipe 204 for reuse, saving a large amount of water resources.

[0040] When the natural gas after the separation component 3 is cleaned is discharged from the U-shaped pipe 308 into the separation cylinder 101, the air outlet pipe 103 sucks air with the sliding air suction cylinder 408, enabling the separation membrane 44 to purify the natural gas for the second time. The servo motor 402 drives the rotating rod 403 to rotate, and the rotating rod 403 drives the disc 404 and the fixed shaft 405 to move. The fixed shaft 405 drives the push rod 407 to move through the push-pull plate 406. Since the sliding air suction cylinder 408 slides in the air outlet pipe 103, the push rod 407 can drive the sliding air suction cylinder 408 to move horizontally back and forth. The sliding air suction cylinder 408 drives the limit frame 409 to move, and the limit frame 409 drives the sliding rod 41 and the connecting seat 42 to move. The connecting seat 42 slides in the reciprocating groove 47 through the lifting rod 48, causing the connecting seat 42 to move vertically while moving horizontally. The connecting seat 42 oscillates the separation membrane 44 through the lifting support plate 43, facilitating the rapid fall of the sand and gravel on the separation membrane 44 under vibration, avoiding the blockage of the separation membrane 44, and improving the cleaning efficiency.

[0041] When the lifting support plate 43 moves up and down reciprocally, the lifting support plate 43 drives the liquid spraying tank 503 to move up and down reciprocally through the L-shaped push-pull frame 501 and the convex sliding plate 502. The liquid spraying tank 503 drives the liquid inlet pipe 504 to move. When the hollow suction rod 601 descends, the hollow suction rod 601 drives the connecting cylinder 605 to descend. Since the frictional force between the piston 603 and the suction pipe 506 is greater than the frictional force between the hollow suction rod 601 and the piston 603, only the connecting cylinder 605 can pull the piston 603. When the piston 603 contacts the connecting cylinder 605, the piston 603 blocks the suction port 604, thereby forming a negative pressure on the piston 603. During the continued descent, the glass ball 607 releases the restriction on the water inlet at the top of the suction pipe 506. During the descent of the piston 603, the cleaning water in the cleaning liquid storage cylinder 202 enters the suction pipe 506 through the suction pipeline 609 under negative pressure. When the liquid inlet pipe 504 drives the hollow suction rod 601 to rise, the glass ball 607 blocks the water inlet at the top of the suction pipe 506. The hollow suction rod 601 pushes the piston 603 to continue rising through the fixed disc 602. The piston 603 squeezes the liquid that has entered the suction pipe 506. During the squeezing process, the liquid is discharged into the hollow suction rod 601 through the suction port 604 and is discharged into the liquid spraying tank 503 through the liquid inlet pipe 504. The liquid spraying tank 503 cleans the separation membrane 44, further improving the service life of the device, eliminating the need for manual replacement, and making the operation more convenient.

[0042] When the impurities and water in the natural gas fall onto the filter plate 704, the rotating rod 403 drives the rotating shaft 702 to rotate through the belt 701. The rotating shaft 702 drives the spiral conveyor plate 703 to scrape the filter plate 704. At the same time, the spiral conveyor plate 703 transports the impurities on the filter plate 704, preventing dirt from clogging the filter plate 704, and conveys the impurities into the collection frame 706 in the collection box 705 to collect the impurities, improving the practicability of the device.

[0043] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application.

Claims

1. A wellhead continuous natural gas desanding and separation device, comprising a separation cylinder (101), the outer wall of the separation cylinder (101) being connected to a wellhead gas transmission pipe (102), the outer wall of the separation cylinder (101) being fixedly connected to an air outlet pipe (103), and one end of the air outlet pipe (103) away from the separation cylinder (101) being fixedly connected to an air outlet fan (104), characterized in that: Also includes: A separation mechanism (2), the separation mechanism (2) comprising a fixing frame (201) fixedly connected to the outer wall of the separation cylinder (101), a cleaning liquid storage cylinder (202) fixedly connected to the side wall of the fixing frame (201), a liquid adding pipe (203) being arranged in communication with the outer wall of the cleaning liquid storage cylinder (202), a liquid suction pipe (204) fixedly connected to the bottom end of the cleaning liquid storage cylinder (202), one end of the liquid suction pipe (204) penetrating the outer wall of the separation cylinder (101) and extending to the interior; A separation assembly (3), the separation assembly (3) comprising a conical separation box (301) fixedly connected to the outer wall of a wellhead gas transmission pipe (102), a separation pipe (302) being arranged at the top center axis of the conical separation box (301), the top end of the separation pipe (302) passing through the inner wall of the conical separation box (301) and extending to the outside, a guide spiral rotating plate (303) being fixedly connected to the outer wall of the separation pipe (302), and the guide spiral rotating plate (303) being located inside the conical separation box (301).

2. The wellhead continuous natural gas sand removal and separation equipment according to claim 1, characterized in that: The separation mechanism (2) further comprises a liquid suction pipe (205) fixedly connected to the top of the cleaning liquid storage cylinder (202); one end of the liquid suction pipe (205) away from the cleaning liquid storage cylinder (202) is fixedly connected to a water pump (206); a drainage end of the water pump (206) is fixedly connected to a drainage pipe (207); a liquid storage chamber (208) is provided inside the separation cylinder (101); one end of the drainage pipe (207) passes through the top of the separation cylinder (101) and extends into the liquid storage chamber (208); and a pressurized nozzle (209) is fixedly connected to the inner wall of the liquid storage chamber (208).

3. A wellhead continuous natural gas desanding and separation equipment according to claim 2, characterized in that: The separation assembly (3) further comprises a separation cylinder (304) fixedly connected to the inner wall of the separation cylinder (101); the top end of the separation tube (302) penetrates the bottom of the separation cylinder (304) and extends to the interior; a separation baffle (305) is fixedly connected to the inner wall of the separation cylinder (304); the bottom end of the pressurized nozzle (209) penetrates the top of the separation cylinder (304) and extends to the interior; a connecting pipe (306) is provided at the bottom of the separation cylinder (304); a liquid outlet (307) is provided on the outer wall of the connecting pipe (306); the liquid outlet (307) is located inside the conical separation box (301); a U-shaped pipe (308) is provided on the outer wall of the separation cylinder (304); one end of the U-shaped pipe (308) penetrates the outer wall of the separation cylinder (101) and extends to the interior.

4. The wellhead continuous natural gas sand removal and separation equipment according to claim 3, characterized in that: The bottom of the conical separation box (301) is fixedly connected to a sand discharge pipe (309), one end of the sand discharge pipe (309) away from the conical separation box (301) penetrates the outer wall of the separation cylinder (101) and extends to the inside, and a one-way valve (310) is provided on the outer wall of the sand discharge pipe (309).

5. The wellhead continuous natural gas sand removal and separation equipment according to claim 4, characterized in that: The outer wall of the separation cylinder (101) is provided with a reciprocating mechanism (4), the reciprocating mechanism (4) comprising a fixed bracket (401) fixedly connected to the outer wall of the separation cylinder (101), the inner wall of the fixed bracket (401) being fixedly connected to a servo motor (402), the output end of the servo motor (402) being fixedly connected to a rotating rod (403), the rotating rod (403) penetrating the outer wall of the separation cylinder (101) and extending to the interior, the side of the rotating rod (403) A disc (404) is provided on the wall, the side wall of the disc (404) is fixedly connected to a fixed shaft (405), the outer wall of the fixed shaft (405) is rotatably connected to a push-pull plate (406), one end of the push-pull plate (406) away from the fixed shaft (405) is rotatably connected to a push-pull rod (407), one end of the push-pull rod (407) is fixedly connected to a sliding suction cylinder (408), and the outer wall of the sliding suction cylinder (408) is slidably connected to the inner wall of the air outlet pipe (103).

6. A wellhead continuous natural gas sand removal and separation equipment according to claim 5, characterized in that: The outer wall of the sliding suction cylinder (408) is fixedly connected to a limiting frame (409), the inner wall of the limiting frame (409) is slidably connected to a sliding rod (41), the outer wall of the sliding rod (41) is fixedly connected to a connecting seat (42), the bottom of the connecting seat (42) is fixedly connected to a lifting support plate (43), the inner wall of the lifting support plate (43) is fixedly connected to a separation membrane (44), and one end of the separation membrane (44) away from the lifting support plate (43) is fixedly connected to the outer wall of the sliding suction cylinder (408).

7. A wellhead continuous natural gas sand removal and separation equipment according to claim 6, characterized in that: The inner wall of the separation cylinder (101) is fixedly connected to a fixed plate (45), the side wall of the fixed plate (45) is fixedly connected to a reciprocating plate (46), the side wall of the reciprocating plate (46) is provided with a reciprocating groove (47), the inner wall of the reciprocating groove (47) is slidably connected to a lifting rod (48), and one end of the lifting rod (48) away from the reciprocating groove (47) is fixedly connected to the side wall of the connecting seat (42).

8. The wellhead continuous natural gas sand removal and separation equipment according to claim 7, characterized in that: A water spray mechanism (5) is provided on the top of the lifting support plate (43), and the water spray mechanism (5) comprises an L-shaped push-pull frame (501) fixedly connected to the top of the lifting support plate (43); a convex sliding plate (502) is slidably connected to the side wall of the L-shaped push-pull frame (501); a spray liquid box (503) is fixedly connected to the side wall of the convex sliding plate (502); a liquid inlet pipe (504) is provided in communication with the side wall of the spray liquid box (503); a fixed support plate (505) is fixedly connected to the inner wall of the separation cylinder (101); and a suction pipe (506) is fixedly connected to the inner wall of the fixed support plate (505).

9. The wellhead continuous natural gas sand removal and separation equipment according to claim 8, characterized in that: The interior of the suction tube (506) is provided with a suction assembly (6), the suction assembly (6) comprising a suction hollow rod (601) slidably connected to the central axis of the bottom of the suction tube (506), the outer wall of the suction hollow rod (601) being connected to one end of the liquid inlet tube (504), the outer wall of the suction hollow rod (601) being fixedly connected to a fixed disk (602), the outer wall of the suction hollow rod (601) being provided with a suction port (604), and the outer wall of the suction hollow rod (601) being provided with a piston (603). The outer wall of the piston (603) is slidably connected to the inner wall of the suction tube (506); the top end of the suction hollow rod (601) is fixedly connected to a connecting tube (605); the inner wall of the connecting tube (605) is fixedly connected to a spring (606); one end of the spring (606) away from the connecting tube (605) is fixedly connected to a glass ball (607); the inner wall of the suction tube (506) is fixedly connected to a suction pipe (609); one end of the suction pipe (609) penetrates the outer wall of the cleaning liquid storage tube (202) and extends to the interior.

10. The method for using a wellhead continuous natural gas desanding and separation device according to claim 9, characterized in that: The steps include: S1: The wellhead gas transmission pipe (102) is connected to the wellhead, and the air outlet fan (104) is started. The air outlet fan (104) sucks out the treated natural gas through the air outlet pipe (103). When the natural gas with sand particles enters the conical separation box (301), the guide spiral rotating plate (303) guides the natural gas, and the particles with a density greater than that of the natural gas are thrown toward the inner wall of the conical separation box (301). The sand particles that fall down are discharged to the top of the filter plate (704) through the sand discharge pipe (309). When the rotating and descending external swirling airflow reaches the bottom of the separation tube (302), the natural gas moves upward along the separation tube (302) and enters the separation cylinder (304); S2: The liquid adding pipe (203) adds appropriate cleaning water into the cleaning liquid storage cylinder (202), and the water pump (206) is started. The water pump (206) sucks the liquid in the cleaning liquid storage cylinder (202) into the drain pipe (207) through the liquid suction pipe (205). The drain pipe (207) discharges the cleaning liquid into the liquid storage chamber (208), and cleans the separation baffle (305) through the pressure nozzle (209); S3: When the natural gas cleaned by the separation component (3) is discharged from the U-shaped tube (308) into the separation cylinder (101), the gas outlet pipe (103) and the sliding suction cylinder (408) are suctioned, the servo motor (402) drives the rotating rod (403) to rotate, the rotating rod (403) drives the disc (404) and the fixed shaft (405) to move, and the fixed shaft (405) pulls the push-pull rod (407) to move through the push-pull plate (406). Since the sliding suction cylinder (408) is in the gas outlet pipe (10 3) internal sliding, so that the push-pull rod (407) drives the sliding suction cylinder (408) to perform reciprocating lateral movement, the sliding suction cylinder (408) drives the limiting frame (409) to move, the limiting frame (409) drives the sliding rod (41) and the connecting seat (42) to move, the connecting seat (42) slides in the reciprocating groove (47) through the lifting rod (48), so that the connecting seat (42) performs lifting movement while performing lateral movement, and the connecting seat (42) causes the separation membrane (44) to oscillate through the lifting support plate (43); S4: The lifting support plate (43) pulls the liquid spray box (503) to move up and down through the L-shaped push-pull frame (501) and the convex sliding plate (502), and the liquid spray box (503) drives the liquid inlet pipe (504) to move, and water is absorbed through the reciprocating movement of the suction component (6). The absorbed water is discharged from the liquid inlet pipe (504) into the liquid spray box (503), and the separation membrane (44) is cleaned by the liquid spray box (503).

Images