Anti-blocking brine discharging device for salt cavern gas storage

Abstract

The invention relates to the technical field of salt cavern gas storage brine discharging, in particular to a salt cavern gas storage anti-blocking brine discharging device which comprises an obstacle breaking mechanism, a liquid changing mechanism arranged in the obstacle breaking mechanism, a tooth head strengthening mechanism arranged in the liquid changing mechanism and a self-adaptive pressure control mechanism arranged in the tooth head strengthening mechanism. The barrier breaking mechanism comprises a reinforcing ring sleeve, a first rail piece arranged in a groove in the inner side of the reinforcing ring sleeve, and a breaking tooth head movably installed in the first rail piece. An existing central pipe brine discharging mode is set to be a liquid changing mechanism of double-cavity circulating brine discharging, kinetic energy is provided for a tooth head reinforcing mechanism through flowing of a solution, and under the high-pressure state, the tooth head reinforcing mechanism in stable rotation can drive a plurality of evenly-distributed tooth heads to forcibly crush deep salt mounds and hard foreign matter in a salt layer; and the crushed slag is discharged by the liquid changing mechanism under the pressure of the brine, so that the interference of foreign matters on the brine discharging operation is avoided.

Description

Technical Field

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

[0002] The brine drainage system in salt cavern gas storage effectively prevents brine from entering the gas storage cavity during the gas injection process, ensuring that the gas storage facility maintains stable operation under high pressure.

[0003] The current dual-pipe ring gas injection and central pipe brine discharge methods have certain drawbacks. Since the properties of the salt dome or salt layer are difficult to guarantee, the brine discharge operation will be restricted when it is obstructed by deep, hard foreign objects during the brine discharge process. In severe cases, the brine discharge chamber will become blocked, which will cause the gas injection pressure to gradually increase under high pressure, further increasing the stability and safety of the gas storage.

[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-draining device for preventing blockage in a salt cavern gas storage facility includes a barrier-breaking mechanism, a liquid-changing mechanism disposed within the barrier-breaking mechanism, a toothed reinforcement mechanism disposed within the liquid-changing mechanism, and an adaptive pressure control mechanism disposed within the toothed reinforcement mechanism. The barrier-breaking mechanism includes a reinforcing ring, a first track component disposed in a groove on the inner side of the reinforcing ring, a crushing tooth movably mounted within the first track component, and a bottom ring mounted at the bottom end of the reinforcing ring. A brine-draining slot is provided on the outer side of the reinforcing ring. The liquid-changing mechanism includes a first wing tube with an inlet hole inside, a housing disposed at the bottom end of the inlet hole, a support movably mounted within the housing, an impeller mounted outside the support, and a first toothed ring mounted on the support. The toothed reinforcement mechanism includes a partition disposed in the middle of the inner cavity of the reinforcing ring, an inner core sleeve movably mounted within the partition, a second toothed ring mounted on the inner core sleeve, a second track component mounted within the inner core sleeve, a slider movably mounted within the second track component, and a traction component connected to the slider. The other end of the traction component is movably mounted on the crushing tooth.

[0007] In a preferred embodiment, the present invention can be further configured such that the inner cavity of the built-in core sleeve has a cylindrical cavity. The adaptive pressure control mechanism includes a perforated cone head movably installed in a cylindrical cavity, a guide rod installed at the top of the perforated cone head, a spring connected to the perforated cone head and bearing pressure in the cylindrical cavity, a sliding plate installed at the top of the guide rod, and an arc-shaped anti-overflow plate installed on the sliding plate. The fluid exchange mechanism also includes a tray installed in the inlet hole, a guide ring installed at the top of the tray, and a flow guide pipe installed at the bottom of the tray.

[0008] In a preferred embodiment, the present invention may be further configured such that the liquid changing mechanism further includes a second wing tube, and the interior of the second wing tube is provided with a drain hole; The tooth reinforcement mechanism also includes a U-shaped frame disposed on the partition, and a through hole is provided inside the U-shaped frame; an annular frame is installed on the top of the partition; the U-shaped frame is adapted to be symmetrical with the liquid inlet hole, and the annular frame is adapted to be symmetrical with the liquid outlet hole. The cavity formed by the annular frame, the reinforcing ring, and the first wing tube is connected to the brine discharge trough.

[0009] In a preferred embodiment, the present invention may be further configured such that the obstacle-breaking mechanism further includes a ring buckle disposed at the top of the reinforcing ring sleeve, a protective tube disposed inside the ring buckle and located directly above the reinforcing ring sleeve, an end cap disposed at the top of the first track member, and a first bolt penetrating into the reinforcing ring sleeve and installed on the first track member.

[0010] In a preferred embodiment, the present invention may be further configured such that the fluid changing mechanism further includes a positioning post disposed between the first wing tube and the second wing tube, and the tray is fixedly installed on the positioning post; The inner wall of the first wing tube is provided with a vertical groove, and the arc-shaped anti-overflow plate is movably installed in the vertical groove.

[0011] In a preferred embodiment, the present invention may be further configured such that the toothed reinforcement mechanism further includes a column head mounted on the guide rod and a plurality of cables connected to the column head; The outer end of the cable is adapted to pass through the second track component and is installed inside the slider.

[0012] In a preferred embodiment, the present invention may be further configured such that: a tapered groove is provided on the inner side, and one end of the slide plate extending into the inner cavity of the liquid inlet is adapted to fit the tapered groove.

[0013] In a preferred embodiment, the present invention can be further configured such that the bracket is composed of a T-shaped support rod and a cross-shaped bracket, and the cross-shaped bracket is fixedly installed on the inner wall of the first toothed ring.

[0014] In a preferred embodiment, the present invention may be further configured such that sealing strips are provided at the top of the annular frame and at both ends facing the inner wall of the reinforcing ring.

[0015] In a preferred embodiment, the present invention can be further configured such that the perforated cone has a conical structure and an arc-shaped slope at the top of the perforated cone to facilitate the discharge of brine and prevent the accumulation of slag.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. This invention replaces the existing central tube brine discharge method with a double-chamber circulating brine exchange mechanism. The flow of the solution provides kinetic energy to the toothed reinforcement mechanism. Under high pressure, the toothed reinforcement mechanism, which is in stable rotation, will drive multiple evenly distributed teeth to forcibly break up deep salt domes and hard foreign objects in the salt layer. The broken debris is discharged by the brine exchange mechanism under the pressure of the brine, thereby avoiding interference from foreign objects to the brine discharge operation.

[0017] 2. This invention incorporates an adaptive pressure control mechanism within the tooth reinforcement mechanism. When a hard foreign object is present in a deep salt dome or salt layer, and the object is large in size, the adaptive pressure control mechanism that comes into contact with the hard foreign object will cause multiple evenly distributed teeth to contract rapidly until the teeth receive stronger pressure resistance. At this point, the rotating teeth can enhance the impact force on the hard foreign object, thereby improving the crushing efficiency of the hard foreign object.

[0018] 3. By setting a guide tube inside the liquid inlet, when the adaptive pressure control mechanism comes into contact with a foreign object and rises in the opposite direction, the pushed slider will cause the diameter of the hole at the bottom of the guide tube to shrink. At this time, the pressure of the solution after passing through the guide tube will be further increased, thereby improving the impact strength on the foreign object and improving the efficiency of brine discharge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the use of the present invention; Figure 2 This is a bottom view diagram of the present invention; Figure 3 This is a schematic diagram of the obstacle-breaking mechanism of the present invention; Figure 4 For the present invention ceramic Figure 3 An explosion diagram; Figure 5 This is a schematic diagram of the fluid exchange mechanism of the present invention; Figure 6 For the present invention Figure 5 An explosion diagram; Figure 7 This is a schematic diagram of the tooth reinforcement mechanism of the present invention.

[0020] Figure label: 100. Obstacle-breaking mechanism; 110. Protective pipe; 120. Reinforcing ring; 1201. Brine discharge trough; 1202. Bottom ring; 130. Ring buckle; 140. First track component; 1401. End cap; 150. Crushing tooth head; 160. First bolt; 200. Fluid changing mechanism; 210. First wing tube; 2101. Fluid inlet; 2102. Vertical groove; 220. Second wing tube; 2201. Fluid outlet; 230. Positioning post; 2301. Support plate; 2302. Guide ring; 2303. Flow guide tube; 240. Outer shell; 2401. Support; 2402. Impeller; 2403. First toothed ring; 300. Tooth head reinforcement mechanism; 310. Partition plate; 3101. U-shaped frame; 3102. Ring frame; 320. Built-in core sleeve; 3201. Second track component; 3202. Slider; 3203. Traction component; 330. Cable; 340. Column head; 350. Second toothed ring; 400. Adaptive pressure control mechanism; 410. Perforated cone head; 420. Guide rod; 430. Spring; 440. Slide plate; 450. Arc-shaped anti-overflow plate. Detailed Implementation

[0021] 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.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0023] 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.

[0024] Example 1: Combination Figures 1 to 7 As shown, the present invention provides a brine discharge device for a salt cavern gas storage facility to prevent blockage, comprising a barrier breaking mechanism 100, a liquid exchange mechanism 200 disposed within the barrier breaking mechanism 100, a toothed reinforcement mechanism 300 disposed within the liquid exchange mechanism 200, and an adaptive pressure control mechanism 400 disposed within the toothed reinforcement mechanism 300. The liquid exchange mechanism 200 is used to input the solution and discharge the brine. The toothed reinforcement mechanism 300 is powered by the liquid exchange mechanism 200 to rotate. The adaptive pressure control mechanism 400 controls the compressive strength of the toothed reinforcement mechanism 300 and the liquid exchange mechanism 200 by means of foreign object pressure.

[0025] The obstacle-breaking mechanism 100 includes a reinforcing ring 120, a first track member 140 disposed in a groove inside the reinforcing ring 120, a breaking tooth 150 movably installed inside the first track member 140, a bottom ring 1202 installed at the bottom end of the reinforcing ring 120, and a drain trough 1201 for draining brine is opened on the outer side of the reinforcing ring 120, a ring buckle 130 disposed at the top end of the reinforcing ring 120, a protective tube 110 disposed inside the ring buckle 130 and located directly above the reinforcing ring 120, an end cap 1401 disposed at the top end of the first track member 140, and a first bolt 160 that penetrates into the reinforcing ring 120 and is installed on the first track member 140. The fluid exchange mechanism 200 includes a first wing tube 210, and the inside of the first wing tube 210 is provided with a liquid inlet hole 2101, a housing 240 disposed at the bottom end of the liquid inlet hole 2101, a bracket 2401 movably installed inside the housing 240, an impeller 2402 installed outside the bracket 2401, and a first toothed ring 2403 installed on the bracket 2401. The bracket 2401 consists of a T-shaped support rod and a cross-shaped bracket, and the cross-shaped bracket is fixedly installed on the inner wall of the first toothed ring 2403. The tooth head reinforcement mechanism 300 includes a partition 310 disposed in the middle of the inner cavity of the reinforcing ring sleeve 120, an inner core sleeve 320 movably installed in the partition 310, a second tooth ring 350 disposed on the inner core sleeve 320, a second track member 3201 installed in the inner core sleeve 320, a slider 3202 movably installed in the second track member 3201, and a traction member 3203 connected to the slider 3202, with the other end of the traction member 3203 movably installed on the crushing tooth head 150.

[0026] When the solution is injected through the inlet hole 2101, the high-pressure solution will enter the outer casing 240 after passing through the inlet hole 2101. Finally, the support 2401, impeller 2402 and first toothed ring 2403 are rotated by the water pressure. The first toothed ring 2403 will drive the second toothed ring 350 and the inner core sleeve 320 to rotate. As the built-in core sleeve 320 rotates, the second track component 3201 installed inside the built-in core sleeve 320 will drive the slider 3202 and the traction component 3203 to rotate. The crushing tooth 150 and the reinforcing ring 120 installed on the other end of the traction component 3203 will rotate and impact the salt dome and salt layer. At this time, the hard foreign objects in the salt dome or salt layer can be crushed by multiple crushing teeth 150. The crushed residue, under the pressure of the brine, will enter the inner cavity of the annular frame 3102 and the second wing tube 220 through the brine discharge port 1201. Finally, the brine and the residue will be discharged outward through the drain hole 2201.

[0027] Example 2: Combination Figures 4 to 7As shown, based on Embodiment 1, the inner cavity of the built-in core sleeve 320 is provided with a cylindrical cavity; The adaptive pressure control mechanism 400 includes a perforated cone 410 movably installed in a cylindrical cavity, a guide rod 420 installed at the top of the perforated cone 410, a spring 430 connected to the perforated cone 410 and bearing pressure in the cylindrical cavity, a slide plate 440 installed at the top of the guide rod 420, and an arc-shaped anti-overflow plate 450 installed on the slide plate 440. The fluid exchange mechanism 200 also includes a support plate 2301 installed in the inlet hole 2101, a guide ring 2302 installed at the top of the support plate 2301, and a guide tube 2303 installed at the bottom of the support plate 2301. The perforated cone 410 has a conical structure, and the top of the perforated cone 410 has an arc-shaped slope to guide the discharge of brine and prevent the accumulation of debris. The inner side of the guide tube 2303 is provided with a tapered groove, and the end of the slide plate 440 that extends through the inner cavity of the liquid inlet 2101 is adapted to fit the tapered groove.

[0028] Preferably, the internal slot of the built-in core sleeve 320 is provided with evenly distributed rectangular slots, and multiple pull cables 330 are adapted to pass through multiple rectangular slots; When a hard foreign object is present in the area directly below the device, it is affected by water pressure. After the foreign object comes into contact with and applies pressure to the perforated cone 410, the perforated cone 410 rises in the opposite direction. The guide rod 420 installed at its top pushes the tube head 340 upward. The cable 330 connected to the tube head 340 pulls the slider 3202 and the traction member 3203 upward. The evenly distributed multiple crushing teeth 150 are also lifted upward synchronously. Finally, the evenly distributed multiple crushing teeth 150 retract into the multiple first track members 140. At this time, the multiple crushing teeth 150, which are supported by pressure, can forcibly crush the hard foreign object.

[0029] Example 3: Combination Figure 3 Character Figure 7 As shown, based on Embodiment 1, the liquid changing mechanism 200 further includes a second wing tube 220, and the interior of the second wing tube 220 is provided with a drain hole 2201. The toothed reinforcement mechanism 300 also includes a U-shaped frame 3101 disposed on the partition 310, and the U-shaped frame 3101 has a through hole inside, an annular frame 3102 installed on the top of the partition 310, and the U-shaped frame 3101 is adapted to be symmetrical with the liquid inlet 2101, while the annular frame 3102 is adapted to be symmetrical with the liquid outlet 2201, a column head 340 installed on the guide rod 420, and a plurality of cables 330 connected to the column head 340; The outer end of the cable 330 is adapted to pass through the second track component 3201 and is installed in the slider 3202; The cavity formed by the annular frame 3102, the reinforcing ring 120, and the first wing tube 210 is connected to the brine discharge trough 1201; Sealing strips are provided at the top of the annular frame 3102 and at both ends facing the inner wall of the reinforcing ring 120; The positioning post 230 is set between the first wing tube 210 and the second wing tube 220, and the support plate 2301 is fixedly installed on the positioning post 230. The inner wall of the first wing tube 210 has a vertical groove 2102, and the arc-shaped anti-overflow plate 450 is movably installed in the vertical groove 2102.

[0030] Preferably, the outer wall of the reinforcing ring 120 is provided with uniformly distributed rectangular grooves, and each rectangular groove is provided with two first bolts 160; As the perforating cone 410 and guide rod 420 continue to rise, the slide plate 440 installed at the top of the guide rod 420 will rise upwards, and the end of the slide plate 440 that penetrates into the liquid inlet 2101 will squeeze the guide tube 2303 until the diameter of the bottom of the guide tube 2303 gradually decreases. The pressure of the solution transferred to the salt dome or salt layer after passing through the narrowed orifice guide tube 2303 will further increase. In conjunction with the rotation of multiple crushing teeth 150, hard foreign objects can be effectively removed.

[0031] The working principle and usage process of this invention: The external water supply pipe is connected to the inner cavity of the liquid inlet 2101 in advance. When the device is extended into the designated area, as the external water supply pipe continuously transfers the solution through the liquid inlet 2101, the solution will first pass through the guide pipe 2303. Then, the solution passing through the guide pipe 2303 will flow through the outer shell 240 and the impeller 2402. Finally, the pressurized solution will perform brine extraction in the area directly below the device. As the brine extraction continues, the brine will show an upward surge under pressure. At the same time, the impeller 2402, which is assisted by the solution, will drive the bracket 2401 and the first toothed ring 2403 to rotate. The first toothed ring 2403 will drive the second toothed ring 350 and the inner core sleeve 320 to rotate. Finally, the inner core sleeve 320 will drive multiple second track components 3201, sliders 3202 and traction components 3203 to rotate. The other end of the traction component 3203 is movably installed on the crushing tooth head 150. Therefore, the multiple evenly distributed crushing teeth heads 150 will work with the reinforcing ring sleeve 120 to rotate at high speed. At this time, the multiple evenly distributed crushing teeth heads 150 will crush hard or large foreign objects in the brine directly below the device. When the crushed residue tends to rise due to the increased pressure of the brine, the external water pumping pipe is connected to the inner cavity of the drain hole 2201. As the external water pumping pipe continuously pumps out the brine, the residue will eventually mix with the brine and be effectively drained. When breaking up agglomerated material with excessive strength in a salt dome or salt layer, in order to enhance the compressive strength of multiple breaking teeth 150, when the agglomerated material impacts or contacts the perforated cone 410, the compressed perforated cone 410 rises in the opposite direction. The guide rod 420 installed at the top of the perforated cone 410 pushes the column head 340 to rise, and the column head 340 drives multiple cables 330 to tighten synchronously. Finally, the second track component 3201, slider 3202 and traction component 3203 will continue to rise under traction, and the multiple evenly distributed breaking teeth 150 will also contract towards the multiple first track components 140 under pressure. At this time, the multiple breaking teeth 150 enhance the breaking strength of the agglomerated material by shortening the spacing. At the same time, as the guide rod 420 rises, the slide plate 440 installed at the top of the guide rod 420, together with the arc-shaped anti-overflow plate 450, will also rise. The end of the slide plate 440 that penetrates into the inner cavity of the liquid inlet 2101 will squeeze the guide tube 2303 until the bottom of the guide tube 2303 contracts. At this time, the pressure of the solution after passing through the guide tube 2303 will be further increased, thereby increasing the impact force on the salt dome or salt layer.

[0032] 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 discharge device for preventing blockage in a salt cavern gas storage facility, comprising a barrier-breaking mechanism (100), characterized in that, It also includes a fluid exchange mechanism (200) disposed within the obstacle breaking mechanism (100), a tooth reinforcement mechanism (300) disposed within the fluid exchange mechanism (200), and an adaptive pressure control mechanism (400) disposed within the tooth reinforcement mechanism (300). The obstacle-breaking mechanism (100) includes a reinforcing ring (120), a first track component (140) disposed in a groove inside the reinforcing ring (120), a breaking tooth (150) movably installed in the first track component (140), and a bottom ring (1202) installed at the bottom end of the reinforcing ring (120). A brine discharge slot (1201) is provided on the outer side of the reinforcing ring (120). The fluid exchange mechanism (200) includes a first wing tube (210), and the inside of the first wing tube (210) is provided with a liquid inlet hole (2101), a housing (240) provided at the bottom end of the liquid inlet hole (2101), a bracket (2401) movably installed in the housing (240), an impeller (2402) installed outside the bracket (2401), and a first toothed ring (2403) installed on the bracket (2401). The tooth reinforcement mechanism (300) includes a partition (310) disposed in the middle of the inner cavity of the reinforcing ring (120), an inner core sleeve (320) movably installed in the partition (310), a second toothed ring (350) disposed on the inner core sleeve (320), a second track component (3201) installed in the inner core sleeve (320), a slider (3202) movably installed in the second track component (3201), and a traction component (3203) connected to the slider (3202), and the other end of the traction component (3203) is movably installed on the crushing tooth (150).

2. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The inner cavity of the built-in core sleeve (320) is provided with a cylindrical cavity; The adaptive pressure control mechanism (400) includes a perforated cone (410) movably installed in a cylindrical cavity, a guide rod (420) installed at the top of the perforated cone (410), a spring (430) connected to the perforated cone (410) and pressed in the cylindrical cavity, a slide plate (440) installed at the top of the guide rod (420), and an arc-shaped anti-overflow plate (450) installed on the slide plate (440). The fluid exchange mechanism (200) also includes a tray (2301) installed in the inlet hole (2101), a guide ring (2302) installed at the top of the tray (2301), and a guide tube (2303) installed at the bottom of the tray (2301).

3. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The fluid exchange mechanism (200) also includes a second wing tube (220), and the interior of the second wing tube (220) is provided with a drain hole (2201). The tooth reinforcement mechanism (300) also includes a U-shaped frame (3101) disposed on the partition (310), and the U-shaped frame (3101) has a through hole inside, an annular frame (3102) installed on the top of the partition (310), and the U-shaped frame (3101) is adapted to be symmetrical with the liquid inlet (2101), while the annular frame (3102) is adapted to be symmetrical with the liquid outlet (2201); The cavity formed by the annular frame (3102), the reinforcing ring (120), and the first wing tube (210) is connected to the brine discharge trough (1201).

4. The anti-clogging brine discharge device for a salt cavern gas storage tank according to claim 1, characterized in that, The obstacle-breaking mechanism (100) also includes a ring buckle (130) disposed at the top of the reinforcing ring (120), a protective tube (110) disposed inside the ring buckle (130) and located directly above the reinforcing ring (120), an end cap (1401) disposed at the top of the first track member (140), and a first bolt (160) that penetrates into the reinforcing ring (120) and is installed on the first track member (140).

5. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The fluid exchange mechanism (200) further includes a positioning post (230) disposed between the first wing tube (210) and the second wing tube (220), and the tray (2301) is fixedly installed on the positioning post (230); The inner wall of the first wing tube (210) is provided with a vertical groove (2102), and the arc-shaped anti-overflow plate (450) is movably installed in the vertical groove (2102).

6. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The toothed reinforcement mechanism (300) also includes a column head (340) mounted on the guide rod (420) and a plurality of cables (330) connected to the column head (340). The outer end of the cable (330) is adapted to pass through the second track member (3201) and is installed in the slider (3202).

7. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The inner side of the (2203) is provided with a conical groove, and the end of the slide plate (440) that penetrates into the inner cavity of the liquid inlet (2101) is adapted to fit the conical groove.

8. The anti-clogging brine discharge device for a salt cavern gas storage facility according to claim 1, characterized in that, The bracket (2401) is composed of a T-shaped support rod and a cross-shaped bracket, and the cross-shaped bracket is fixedly installed on the inner wall of the first toothed ring (2403).

9. A brine discharge device for a salt cavern gas storage tank according to claim 3, characterized in that, Sealing strips are provided at the top of the annular frame (3102) and at both ends facing the inner wall of the reinforcing ring (120).

10. A brine discharge device for a salt cavern gas storage tank according to claim 2, characterized in that, The perforated cone (410) has a conical structure, and the top of the perforated cone (410) has an arc-shaped slope to guide the discharge of brine and prevent the accumulation of slag.

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