Anti-blocking halogen discharging device for salt cavern gas storage

Abstract

The application relates to the technical field of gas storage brine discharge, in particular to a salt cavern gas storage anti-blocking brine discharge device, which comprises a flow guide assembly arranged in the well pipe, a brine discharge pipe column mechanism arranged at the bottom of the flow guide assembly, a driving scale removal mechanism and a scale removal mechanism arranged on the brine discharge pipe column mechanism; the brine discharge pipe column mechanism comprises a shunt valve pipe arranged at the bottom of the flow guide assembly, and two limiting washers are arranged on the inner wall of the shunt valve pipe. By arranging the brine discharge pipe column mechanism in the well pipe of the existing salt cavern gas storage, when the brine discharge pipe column mechanism is actively inserted into the inner cavity of the gas storage to the bottom of the pipe body below the brine liquid level, the brine is discharged outward by the aid of a brine discharge pump, at this time, the brine entering the liquid pumping pipe is filtered and then transferred to the impeller, and the rotating impeller can perform spiral drainage on the brine entering the liquid pumping pipe, so that the breaking efficiency of the impurities in the brine is further improved, thereby reducing the deposition and adhesion of high-concentration salt in the static water pumping due to low temperature.

Description

Technical Field

[0001] This invention relates to the field of brine drainage technology for gas storage facilities, specifically a brine drainage device for salt cavern gas storage facilities to prevent blockage. Background Technology

[0002] Salt cavern gas storage facilities are artificial cavities formed by water-soluble salt extraction from underground salt layers or salt domes. They are used to store natural gas or other energy sources (such as compressed air, hydrogen, etc.). They are characterized by good sealing, large storage capacity, high safety, and strong mobility. They are important "underground granaries" and energy regulation facilities in the natural gas pipeline network system.

[0003] During actual use, the tubing system inside the salt well in salt cavern gas storage facilities has certain defects during the long-term process of venting and discharging brine. Affected by ambient temperature, saturated brine precipitates crystals such as NaCl when the temperature decreases or the flow rate slows down, adhering to the pipe wall and forming a crystalline layer. In severe cases, it can completely block the tubing. Furthermore, the increased amount of brine deposits inside the gas storage facility can cause the interlayer in the salt layer to collapse, resulting in the deposition of brine and scale at the bottom of the gas storage cavity. As the deposits increase, the capacity of the gas storage cavity will decrease, leading to a reduction in the actual gas storage capacity.

[0004] In view of this, a brine discharge device for preventing blockage in salt cavern gas storage was designed to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted in this invention is as follows: A brine discharge device for preventing blockage in a salt cavern gas storage facility includes a flow guiding component installed inside the well pipe, a brine discharge pipe string mechanism installed at the bottom of the flow guiding component, a drive scraping mechanism and a discharge mechanism installed on the brine discharge pipe string mechanism; the brine discharge pipe string mechanism includes a diversion valve pipe installed at the bottom of the flow guiding component, and two limiting washers are provided on the inner wall of the diversion valve pipe; a liquid extraction pipe is installed at the bottom end of the diversion valve pipe; a filter screen is fixedly installed at the top of the inner cavity of the liquid extraction pipe; a rotating main shaft is movably installed inside the filter screen; an auxiliary impeller is installed at the top of the rotating main shaft; the auxiliary impeller is located within the two limiting washers.

[0007] In a preferred embodiment, the present invention can be further configured such that: a column head is fixedly installed at the bottom end of the rotating spindle, and a plurality of uniformly distributed scrapers are fixedly installed on the outside of the column head; The scraper consists of a crossbar, three support rods, and an elliptical scraper blade, with the elliptical scraper blade forming a 45-degree angle with the crossbar.

[0008] In a preferred embodiment, the present invention can be further configured as follows: the driving scraping mechanism includes a housing, a chassis, and two load-bearing components fixedly installed outside the diversion valve pipe. Two vertical holes are provided in the plate end at the bottom of the housing. A motor is fixedly installed inside the chassis. A deflection gear is installed on the motor. A winding roller is movably installed inside the load-bearing components. Ring teeth are provided on the outer side of the wheel discs at both ends of the winding roller. The two winding rollers mesh with each other, and a cable is wound around the two winding rollers. Two insert plates are fixedly installed at the bottom end of the cable. A pressure wheel is installed on the outside of the two insert plates. A slide is installed on the outside of the pressure wheel. An annular scraper is installed on the inner end of the slide. The deflection gear meshes with the ring gear inside a top-mounted take-up roller.

[0009] In a preferred embodiment, the present invention can be further configured as follows: a U-shaped groove is provided inside the annular scraper, and both ends of the top of the annular scraper are blade-shaped structures, while a horizontally placed elastic support plate is installed on the inner wall of the U-shaped groove, and a plug is installed at the other end of the elastic support plate. The outer wall of the annular scraper has an insertion hole that communicates with the U-shaped groove, and the plug is adapted to penetrate into the insertion hole.

[0010] In a preferred embodiment, the present invention can be further configured as follows: a semi-cylindrical groove is provided on the outer wall of the liquid extraction tube, and a vertical tube is installed in the semi-cylindrical groove. A plug is installed at the top of the vertical tube, and a vertical groove is provided on the inner side of the vertical tube, and a slide seat is adapted to penetrate into the vertical groove. In a preferred embodiment, the present invention may be further configured such that: a groove is formed on the outer wall of the top end of the suction tube, and a circular hole is formed on the inner wall of the groove; The descaling mechanism includes two sets of clamps fixedly installed outside the diversion valve pipe, and a high-pressure pipe is installed inside the two sets of clamps. The bottom end of the high-pressure pipe is fixedly installed in the pipe groove. An L-shaped hole is opened at the bottom of the inner cavity of the high-pressure pipe, and a sleeve is fixedly installed on the inner wall of the L-shaped hole. A spring and a stopper rod are installed inside the sleeve, and the other end of the spring is adapted to bear pressure on the stopper rod.

[0011] In a preferred embodiment, the present invention can be further configured such that: the stopper rod is T-shaped in general, and the rod end of the stopper rod that penetrates into the circular hole has an inclined surface, and the inclined surface of the stopper rod section faces the annular blade at the top of the annular scraper.

[0012] In a preferred embodiment, the present invention may be further configured such that a packer is fixedly installed on the outside of the liquid extraction tube; The packer consists of an inner steel ring, a sheath, and a sealing gasket, with the sealing gasket fitting snugly against the inner wall of the well casing.

[0013] In a preferred embodiment, the present invention can be further configured such that: the bottom end of the annular scraper has an inwardly recessed funnel-shaped groove, and a plurality of evenly distributed scraping parts are adapted to bear pressure on the port of the funnel-shaped groove at the bottom of the annular scraper, so as to provide an effective passage for the broken scale layer.

[0014] In a preferred embodiment, the present invention can be further configured such that the flow guiding assembly consists of a throttle and an extended vertical pipe, and the bottom of the throttle is provided with multiple studs and fixed to the flange at the top of the diversion valve pipe by multiple nuts.

[0015] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. This invention involves installing a brine discharge string mechanism inside the well pipe of an existing salt cavern gas storage facility. When the brine discharge string mechanism is actively extended towards the bottom of the gas storage facility's inner cavity until the bottom of the pipe is below the brine level, the brine is discharged outward using a brine discharge pump. At this time, the brine enters the pumping pipe, is filtered, and then assists the impeller in rotating. The rotating impeller spirally guides the brine entering the pumping pipe, further improving the efficiency of breaking up impurities in the brine, thereby reducing the deposition and adhesion of high-concentration salts on the pipe wall due to low temperature during static pumping.

[0016] 2. This invention utilizes the mechanical kinetic energy generated by the impeller rotation to drive the main shaft, column head, and multiple scrapers to rotate at high speed. The multiple scrapers, stabilized and pressure-bearing by the annular scraper, break up the scale layer below the brine. The extraction of the brine and the broken scale layer can be actively sucked out. Finally, the scale layer sucked into the extraction pipe is stored inside the annular scraper, thereby actively cleaning the hardened scale layer at the bottom of the gas storage tank cavity and effectively achieving dynamic maintenance of the gas storage tank cavity volume.

[0017] 3. This invention controls the annular scraper to move up and down rhythmically along the inner cavity of the extraction pipe by means of a driving scraping mechanism. During the rhythmic up and down movement, the annular scraper can quickly remove scale from the pipe wall. In conjunction with the operation of the pipe wall descaling pump, the scale layer broken up in the annular scraper at the top of the inner cavity of the extraction pipe can be actively and efficiently extracted, thereby achieving dynamic maintenance of the pipe body and the inner cavity volume of the gas storage tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the use of the present invention; Figure 2 For the present invention Figure 1 A partial 3D schematic diagram; Figure 3 For the present invention Figure 2 A diagram showing the view from below; Figure 4 This is an exploded view of the descaling mechanism of the present invention; Figure 5This is a cross-sectional schematic diagram of the packer of the present invention; Figure 6 This is a cross-sectional schematic diagram of the liquid extraction tube and the outer shell of the present invention; Figure 7 For the present invention Figure 6 An explosion diagram; Figure 8 This is a partial schematic diagram of the brine discharge column mechanism of the present invention; Figure 9 This is an exploded view of the scraping mechanism of the present invention; Figure 10 For the present invention Figure 9 Exploded view of the internal drive module; Figure 11 For the present invention Figure 9 Exploded view of the middle scraping module.

[0019] Figure label: 100. Flow guiding components; 200. Brine discharge column mechanism; 210. Liquid extraction pipe; 2101. Pipe groove; 220. Packer; 230. Diverter valve pipe; 2301. Limiting washer; 240. Filter screen; 250. Rotary spindle; 260. Auxiliary impeller; 270. Column head; 2701. Scraper; 300. Drive scraping mechanism; 310. Housing; 320. Chassis; 3201. Motor; 3202. Deflection gear; 330. Load-bearing component; 3301. Take-up roller; 340. Vertical tube; 3401. Plug; 3402. Vertical groove; 350. Annular scraper; 3501. Plug; 3502. Elastic support plate; 3503. Slide; 360. Cable; 370. Pressure roller; 3701. Insert plate; 400. Descaling mechanism; 410. Clamp; 420. High-pressure pipe; 430. Sleeve; 440. Spring; 450. Plug rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0021] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0022] The following describes, with reference to the accompanying drawings, some embodiments of a salt cavern gas storage anti-clogging and brine discharge device provided by the present invention.

[0023] Example 1: Combination Figures 1 to 11As shown, the present invention provides a brine drainage device for a salt cavern gas storage facility to prevent blockage. It includes a flow guiding component 100 installed inside the well pipe, a brine drainage pipe column mechanism 200 installed at the bottom of the flow guiding component 100, a drive scraping mechanism 300 and a descaling mechanism 400 installed on the brine drainage pipe column mechanism 200. Two branch pipes at the top of the flow guiding component 100 are respectively connected to an external exhaust system and a brine drainage pump. The descaling mechanism 400 is connected to the external pipe wall descaling pump. When the exhaust system is connected to the brine drainage pipe column mechanism 200 and the brine drainage pump is closed, the brine drainage pipe column mechanism 200 can perform exhaust operations. When the exhaust system is closed and the brine drainage pipe column mechanism 200 is connected to the brine drainage pump, the descending brine drainage pipe column mechanism 200 is used for brine drainage. The drive scraping mechanism 300, in conjunction with the descaling mechanism 400, is used to drain brine and descaling from the brine drainage pipe column mechanism 200 and the bottom of the gas storage facility's inner cavity.

[0024] The brine discharge column mechanism 200 includes a diversion valve pipe 230 installed at the bottom of the flow guiding assembly 100, and two limiting washers 2301 are provided on the inner wall of the diversion valve pipe 230. A liquid extraction pipe 210 is installed at the bottom end of the diversion valve pipe 230. A filter screen 240 is fixedly installed at the top of the inner cavity of the liquid extraction pipe 210. A rotating main shaft 250 is movably installed inside the filter screen 240. An auxiliary impeller 260 is installed at the top of the rotating main shaft 250. The auxiliary impeller 260 is located inside the two limiting washers 2301. A column head 270 is fixedly installed at the bottom end of the rotating main shaft 250. A plurality of evenly distributed scrapers 2701 are fixedly installed on the outside of the column head 270. The flow guiding assembly 100 consists of a throttle and an extended vertical pipe, and the bottom of the throttle is provided with multiple studs, which are fixed to the flange at the top of the flow divider valve pipe 230 by multiple nuts; A packer 220 is fixedly installed on the outside of the pumping pipe 210. The packer 220 consists of an inner steel ring, a sheath, and a sealing gasket, and the sealing gasket is adapted to fit against the inner wall of the well pipe. The scraper 2701 consists of a crossbar, three support rods and an elliptical scraper blade, with the elliptical scraper blade forming a 45-degree angle with the crossbar. When in use, the valves in the brine pump and the pipe wall descaling pump are closed in advance, and the exhaust system is run through the client. The exhaust system in operation can extract the gas inside the gas storage tank through the flow guide component 100 and the brine discharge string mechanism 200. At this time, the brine discharge string mechanism 200 is located inside the well pipe and can achieve rapid gas extraction without lifting. After the gas extraction is completed, the exhaust system is shut off until the brine pump and the pipe wall descaling pump are connected to the flow guide assembly 100 and the brine discharge string mechanism 200, so as to facilitate the brine discharge and the ready-to-operate state after the scale layer is broken. Then, the flow guide assembly 100 is released along the bottom of the well tube cavity using an external hoisting device until the bottom port of the liquid extraction pipe 210 sinks and immerses the brine at the bottom of the gas storage cavity. Then, the brine pump in operation can work with the pipe wall descaling pump to achieve the purpose of rapid brine discharge. Preferably, the outer wall of the diversion valve pipe 230 is provided with four symmetrically distributed threaded sections, and nuts are installed on the threaded sections. The inner and outer walls of the pumping pipe 210 are both smooth coated structures, and the height of the packer 220 fixed outside the pumping pipe 210 can be adjusted according to the actual depth of the gas storage cavity to ensure that the packer 220 is always in contact with the inner wall of the well pipe, which facilitates the enhancement of the airtightness of the gas storage cavity. In addition, both limiting washers 2301 have triangular bevels in cross-section to reduce the deposition of dirt in the brine. When the brine is transferred to the flow guiding assembly 100 through the inner cavity of the suction pipe 210, the kinetic energy generated by the flow of the brine after being filtered by the filter screen 240 will help rotate the impeller 260. Ultimately, the impeller 260, the rotating main shaft 250 and the column head 270 will be effectively driven. The evenly distributed multiple scrapers 2701 can quickly and efficiently break up the hardened scale layer below the brine, which facilitates the sludge removal operation at the bottom of the gas storage tank.

[0025] Example 2: Combination Figures 6 to 10 As shown, based on Embodiment 1, the drive scraping mechanism 300 includes a housing 310, a chassis 320, and two load-bearing components 330, which are fixedly installed outside the diversion valve pipe 230. Two vertical holes are opened in the plate end at the bottom of the housing 310. A motor 3201 is fixedly installed inside the chassis 320. A deflection gear 3202 is installed on the motor 3201. A take-up roller 3301 is movably installed inside the load-bearing component 330. Ring teeth are provided on the outer side of the wheel disc at both ends of the take-up roller 3301. The two take-up rollers 3301 mesh with each other. A cable 360 ​​is wound around the two take-up rollers 3301. Two insert plates 3701 are fixedly installed at the bottom end of the cable 360. A pressure wheel 370 is installed on the outside of the two insert plates 3701. A slide 3503 is installed on the outside of the pressure wheel 370. An annular scraper 350 is installed on the inner end of the slide 3503. The deflection gear 3202 is adapted to mesh with the ring gear inside a top-mounted take-up roller 3301; The annular scraper 350 has a U-shaped groove inside, and both ends of the top of the annular scraper 350 are blade-shaped structures. A horizontally placed elastic support plate 3502 is installed on the inner wall of the U-shaped groove, and a plug 3501 is installed on the other end of the elastic support plate 3502. The outer wall of the annular scraper 350 is provided with an insertion hole that communicates with the U-shaped groove, and the plug 3501 is adapted to pass through the insertion hole; The outer wall of the liquid extraction tube 210 is provided with a semi-cylindrical groove, and a vertical tube 340 is installed in the semi-cylindrical groove. A plug 3401 is installed at the top of the plug 3401. A vertical groove 3402 is provided on the inner side of the vertical tube 340, and a slide 3503 is adapted to pass through the vertical groove 3402. A through hole is provided at the bottom end of the vertical tube 340; The bottom end of the annular scraper 350 is provided with an inwardly recessed funnel-shaped groove, and multiple evenly distributed scraper pieces 2701 are adapted to bear pressure on the port of the funnel-shaped groove at the bottom of the annular scraper 350, so as to provide an effective passage for the broken scale layer.

[0026] Preferably, the length of the vertical pipe 340 is the same as the length of the liquid extraction pipe 210, and the plate end on the back of the housing 320 is fixedly installed on multiple threaded sections on the outer wall of the diversion valve pipe 230 by multiple nuts, while the arc-shaped port of the outer casing 310 is fixedly installed on the outer wall of the diversion valve pipe 230 to enhance the safety of the linkage between the motor 3201, the deflection gear 3202 and the two take-up rollers 3301. The load-bearing component 330 consists of two beams and a guide rod, and the take-up roller 3301 is mounted on the outside of the guide rod through a bearing. The take-up roller 3301 has an I-shaped structure, and the two ends of the cable 360, which passes through the inner cavity of the outer shell 310, are respectively fixedly mounted on the roller body of the two take-up rollers 3301. In addition, the annular scraper 350 has a cylindrical through hole in the middle to provide an effective channel for the discharge of brine and scale. The slide 3503 has a slot at one end that extends into the inner cavity of the vertical pipe 340, and an end rod is installed in the slot. The pressure wheel 370 is movably installed on the end rod. The pressure wheel 370 has two arc-shaped grooves. Rectangular insertion holes are opened in the two fan-shaped plate segments between the two arc-shaped grooves. The two insertion plates 3701 are adapted to pass through the two rectangular insertion holes. The U-shaped cable segment at the bottom of the cable 360 ​​is fixedly installed in the two adjacent insertion plates 3701.

[0027] Example 3: Combination Figures 4 to 7 As shown, in the above embodiment, a groove 2101 is provided on the outer wall of the top end of the liquid extraction tube 210, and a circular hole is provided on the inner wall of the groove 2101. The descaling mechanism 400 includes two sets of clamps 410 fixedly installed outside the diversion valve pipe 230, and a high-pressure pipe 420 is installed inside the two sets of clamps 410. The bottom end of the high-pressure pipe 420 is fixedly installed in the pipe groove 2101. An L-shaped hole is opened at the bottom of the inner cavity of the high-pressure pipe 420, and a sleeve 430 is fixedly installed on the inner wall of the L-shaped hole. A spring 440 and a stopper rod 450 are provided inside the sleeve 430, and the other end of the spring 440 is adapted to bear pressure on the stopper rod 450. The stopper rod 450 has a T-shaped structure, and the end of the stopper rod 450 that passes through the round hole has a bevel, and the bevel of the stopper rod 450 is directed toward the annular blade at the top of the annular scraper 350.

[0028] Preferably, the two sets of clamps 410 are fixedly installed on the outer wall of the diversion valve pipe 230 by welding. The surfaces of the high pressure pipe 420, the liquid extraction pipe 210, the outer shell 310 and the vertical pipe 340 are all coated with anti-corrosion coating, while the inner wall of the high pressure pipe 420 has a smooth coating structure. The plug rod 450 is fixedly installed with a sealing gasket on the column head that penetrates into the inner cavity of the sleeve 430 to enhance the airtightness of the inner cavity of the sleeve 430 and facilitate the anti-corrosion protection of the spring 440. When the motor 3201 runs and works with the deflection gear 3202 to assist the rotation of the two take-up rollers 3301, the regularly wound cable 360 ​​will drive the pressure roller 370 and the annular scraper 350 to reciprocate up and down along the inner cavity of the suction pipe 210. After the annular scraper 350 rises to the top of the inner cavity of the suction pipe 210, the plug rod 450 pushes the plug pad 3501 into the annular scraper 350, and the U-shaped groove will connect with the L-shaped hole. The operating pipe wall descaling pump can actively and efficiently empty the scale layer stored in the U-shaped groove through the high-pressure pipe 420.

[0029] The working principle and usage process of this invention are as follows: The top section of the flow guiding component 100 is connected to the inlet end of the brine pump using an external pipe, and the top section of the high pressure pipe 420 is connected to the pipe wall descaling pump using an external pipe. During use, the two valves inside the brine discharge pump and the pipe wall descaling pump are closed in advance via the client. Then, the venting system is run to extract the gas inside the gas storage tank from the brine discharge string mechanism 200 located in the well pipe. After the gas is extracted, the venting system is closed. The device is lowered to the bottom of the gas storage tank using an external hoisting device until the column head 270 and multiple scrapers 2701 sink to the brine and scale layer area. At the same time, the two valves inside the brine discharge pump and the pipe wall descaling pump are opened. When the brine pump operates and actively discharges brine, the brine entering the extraction pipe 210 is filtered by the filter screen 240 and continues to be discharged outwards along the diversion valve pipe 230 and the guide assembly 100. The auxiliary impeller 260, rotated under the pressure of the brine, drives the rotating main shaft 250, the column head 270, and multiple scrapers 2701 to rotate. The rotating scrapers 2701 break up the accumulated scale layer, which, in conjunction with the brine, is transferred into the inner cavity of the extraction pipe 210. The filtered scale layer then flows outwards along the diversion valve pipe 230 and the guide assembly 100. The wall of the suction pipe 210 falls down and remains in the groove inside the annular scraper 350. At the same time, during the brine discharge operation, the motor 3201 is intermittently operated by the client to rotate forward and reverse. At this time, the deflection gear 3202 will drive the two meshing take-up rollers 3301, and the relative rotation of the two take-up rollers 3301 will drive the cable 360 ​​to extend regularly. At this time, the pressure wheel 370 and the two insert plates 3701 will drive the slide 3503 and the annular scraper 350 to move up and down regularly along the wall of the suction pipe 210. When the annular scraper 350 rises to the top of the inner cavity of the suction pipe 210, the plug rod 450, under the elastic pressure of the spring 440, pushes the plug pad 3501 into the inner groove of the annular scraper 350. Then, the pipe wall descaling pump is run. At this time, the inner cavity of the high pressure pipe 420 will generate a high-pressure air discharge state, and the scale layer in the inner groove of the annular scraper 350 will be drawn outward along the bottom cavity of the high pressure pipe 420. With the help of some brine, the efficiency of scale layer discharge can be further improved. After the scale layer in the inner groove of the annular scraper 350 is completely removed, the motor 3201 reverses until the annular scraper 350 returns to its original position and descends to the bottom of the inner cavity of the suction pipe 210. At this time, the annular scraper 350 can further improve the strength of the multiple insert plates 3701 in breaking the scale layer at the bottom of the inner cavity of the gas storage tank. The above method can provide an effective passage for subsequent air venting and brine discharge by placing the pipe inside the well casing, and avoid the problem of reduced air venting and brine discharge efficiency caused by brine accumulation and scale on the pipe wall after long-term use. At the same time, regular breaking and cleaning of brine and scale at the bottom of the gas storage chamber can ensure the constant amount of gas stored in the gas storage chamber and avoid the problem of shrinkage of the gas storage chamber caused by excessive brine and scale deposition.

[0030] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A brine drainage device for preventing blockage in a salt cavern gas storage facility, comprising a flow guiding component (100) disposed inside the well pipe, characterized in that, It also includes a brine discharge column mechanism (200) installed at the bottom of the brine discharge assembly (100), a drive scraping mechanism (300) and a descaling mechanism (400) installed on the brine discharge column mechanism (200). The brine discharge column mechanism (200) includes a diversion valve pipe (230) installed at the bottom of the flow guiding assembly (100), and two limiting washers (2301) are provided on the inner wall of the diversion valve pipe (230). A liquid extraction pipe (210) is installed at the bottom end of the diversion valve pipe (230). A filter screen (240) is fixedly installed at the top of the inner cavity of the liquid extraction pipe (210). A rotating spindle (250) is movably installed inside the filter screen (240), and an auxiliary impeller (260) is installed at the top of the rotating spindle (250). The auxiliary impeller (260) is located inside the two limiting washers (2301).

2. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The bottom end of the rotating spindle (250) is fixedly mounted with a column head (270), and a plurality of uniformly distributed scrapers (2701) are fixedly mounted on the outside of the column head (270). The scraper (2701) consists of a crossbar, three support rods and an elliptical scraper blade, with the elliptical scraper blade forming a 45-degree angle with the crossbar.

3. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The drive scraping mechanism (300) includes a housing (310), a chassis (320), and two load-bearing components (330) fixedly installed outside the diversion valve pipe (230). Two vertical holes are provided in the bottom plate end of the housing (310). A motor (3201) is fixedly installed inside the chassis (320), and a deflection gear (3202) is installed on the motor (3201). A take-up roller (3301) is movably installed inside the load-bearing components (330), and the take-up roller (3301)... 301) Both ends of the wheel are provided with ring teeth. The two take-up rollers (3301) mesh with each other, and the two take-up rollers (3301) are wound with a cable (360). The bottom end of the cable (360) is fixedly installed with two insert plates (3701), and the outside of the two insert plates (3701) is equipped with a pressure wheel (370). The outside of the pressure wheel (370) is equipped with a slide (3503), and the inner end of the slide (3503) is equipped with an annular scraper (350). The deflection gear (3202) is adapted to mesh with the ring gear inside a top-mounted take-up roller (3301).

4. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 3, characterized in that, The annular scraper (350) has a U-shaped groove inside, and the two ends of the top of the annular scraper (350) are both knife-edge structures. A horizontal elastic support plate (3502) is installed on the inner wall of the U-shaped groove, and a plug (3501) is installed on the other end of the elastic support plate (3502). The outer wall of the annular scraper (350) is provided with an insertion hole that communicates with the U-shaped groove, and the plug (3501) is adapted to penetrate into the insertion hole.

5. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The outer wall of the liquid extraction tube (210) is provided with a semi-cylindrical groove, and a vertical tube (340) is installed in the semi-cylindrical groove. A plug (3401) is installed at the top of the vertical tube (340). A vertical groove (3402) is provided on the inner side of the vertical tube (340), and a slide (3503) is adapted to pass through the vertical groove (3402).

6. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The outer wall of the top end of the liquid extraction tube (210) is provided with a tube groove (2101), and the inner wall of the tube groove (2101) is provided with a circular hole; The descaling mechanism (400) includes two sets of clamps (410) fixedly installed outside the diversion valve pipe (230), and a high-pressure pipe (420) is installed in the two sets of clamps (410). The bottom end of the high-pressure pipe (420) is fixedly installed in the pipe groove (2101). An L-shaped hole is opened at the bottom of the inner cavity of the high-pressure pipe (420), and a sleeve (430) is fixedly installed on the inner wall of the L-shaped hole. A spring (440) and a stopper rod (450) are provided in the sleeve (430), and the other end of the spring (440) is adapted to bear pressure on the stopper rod (450).

7. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 6, characterized in that, The stopper rod (450) has a T-shaped structure, and the end of the stopper rod (450) that passes through the round hole has a bevel, and the bevel of the stopper rod (450) is facing the annular blade at the top of the annular scraper (350).

8. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, A packer (220) is fixedly installed on the outside of the extraction tube (210). The packer (220) consists of an inner steel ring, a sheath and a sealing gasket, and the sealing gasket is adapted to fit against the inner wall of the well pipe.

9. A brine discharge device for a salt cavern gas storage tank according to claim 3, characterized in that, The bottom end of the annular scraper (350) is provided with an inwardly recessed funnel-shaped groove, and a plurality of evenly distributed scraper pieces (2701) are adapted to bear pressure on the port of the funnel-shaped groove at the bottom of the annular scraper (350) to provide an effective passage for the broken scale layer.

10. A brine discharge device for a salt cavern gas storage tank according to claim 1, characterized in that, The flow guiding assembly (100) consists of a throttle and an extended vertical pipe, and the bottom of the throttle is provided with multiple studs, which are fixed to the flange on the top of the diversion valve pipe (230) by multiple nuts.

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