Gas-liquid enhanced sulfurization reaction device

Abstract

The application discloses a gas-liquid reinforced type sulfuration reaction equipment, which comprises a reaction kettle body, at least one gas-liquid mixer is inserted into the reaction kettle body at the top of the reaction kettle body, and a liquid discharge pipe for discharging liquid after sulfuration is arranged at the bottom of the reaction kettle body; the gas-liquid mixer comprises a liquid inlet section at the top of the reaction kettle body and a diffusion section in the reaction kettle body, a vacuum chamber is arranged between the liquid inlet section and the diffusion section, and a reduced diameter section is inserted into the vacuum chamber at one end of the liquid inlet section close to the vacuum chamber. According to the application, the existing liquid alkali pipeline of the system is integrated into the waste acid circulating pipeline and the hydrogen sulfide gas supply pipeline, an electric control valve is installed, the waste acid circulating pipeline and the hydrogen sulfide gas supply pipeline are regularly washed by alkali liquid, and the scale is dissolved by reaction, so that the scale in the hydrogen sulfide inlet pipeline can be removed without disassembling the equipment and the pipeline.

Description

Technical Field

[0001] This invention relates to the field of waste acid treatment technology, and in particular to a gas-liquid enhanced sulfidation reaction device. Background Technology

[0002] The waste acid treatment system employs a dual-series synchronous operation, using sodium hydrosulfide to react with dilute sulfuric acid to produce hydrogen sulfide. Hydrogen sulfide serves as the sulfiding agent, and a gas-liquid enhanced sulfidation technology is used. This technology achieves resource utilization of the sulfidation waste gas while rationally disposing of waste gas and recovering sodium salts, significantly improving the utilization rate of sulfur. The technology is implemented through a spray-enhanced fully enclosed reactor and its supporting equipment, consisting of five steps: gas generation, sulfidation, tail gas absorption, liquid discharge, and evaporation. The sulfided liquid after reaction is aerated in a buffer tank and flows by gravity to a thickener for solid-liquid separation. The underflow enters a plate and frame filter press, while the supernatant overflows into a clear liquid tank and is sent to the next process. Excess hydrogen sulfide is absorbed by spraying liquid alkali in a two-stage removal tower. The absorbed liquid mainly consists of sodium sulfide and sodium hydrosulfide, which is reused as raw material in the gas generation reactor.

[0003] Currently, the design principle of the gas-liquid enhanced sulfidation reactor in waste acid treatment systems is similar to that of a water jet pump. The reactor employs a dual-channel design, with liquid entering from both ends at the top and gas entering from both sides at the top. The liquid pipeline narrows at the top of the reactor, causing the waste acid to be ejected at high speed through nozzles. This creates a low pressure in the vacuum chamber, drawing hydrogen sulfide gas into the vacuum chamber, which then enters the mixing chamber. In the mixing chamber, the waste acid and hydrogen sulfide are thoroughly mixed, achieving a highly efficient reaction. However, this device has certain drawbacks. Hydrogen sulfide reacts with As and Cu in the splashed waste acid within the inlet pipeline to form As₂S₃, CuS, etc., causing scaling and clogging of the inlet pipeline, resulting in reduced reaction efficiency. This reactor is a fully enclosed system and is classified as special equipment. The scaling of the hydrogen sulfide pipeline poses a high risk of maintenance and is subject to complex reporting and acceptance procedures, severely impacting production. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings mentioned above by providing a gas-liquid enhanced sulfidation reaction device that removes scale from the hydrogen sulfide inlet pipe without disassembling the equipment and pipelines.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a gas-liquid enhanced sulfidation reaction device, comprising a reactor body, wherein at least one gas-liquid mixer is provided at the top of the reactor body and inserted into the reactor body, and a drain pipe is provided at the bottom of the reactor body for discharging the sulfidated liquid; the gas-liquid mixer comprises a liquid inlet section located at the top of the reactor body and a diffusion section located inside the reactor body, wherein a vacuum chamber is provided between the liquid inlet section and the diffusion section, wherein a narrowing section is provided at the end of the liquid inlet section near the vacuum chamber and inserted into the vacuum chamber, and the gas-liquid mixer further comprises a three-way air inlet section connected to the vacuum chamber, wherein one end of the three-way air inlet section away from the vacuum chamber is connected to a hydrogen sulfide gas supply pipe, and the other end of the three-way air inlet section away from the vacuum chamber is connected to an alkali solution pipe;

[0006] A three-way connector is provided at the end of the liquid inlet section away from the vacuum chamber. The end of the three-way connector away from the liquid inlet section is connected to the waste acid circulation pipeline, and the other end of the three-way connector away from the liquid inlet section is connected to the alkali solution pipeline. The alkali solution pipeline, the waste acid circulation pipeline, and the hydrogen sulfide gas supply pipeline are all equipped with electrically controlled valves.

[0007] Furthermore, the three-way air inlet section consists of a transverse section perpendicular to the liquid inlet section and a vertical section that communicates with and is perpendicular to the transverse section. The transverse section is provided with a scraping mechanism that can assist in scraping off the scale at the connection between the transverse section and the vacuum chamber when the connection is flushed with alkaline solution.

[0008] The scraping mechanism includes an impeller assembly that is driven to rotate by the alkali solution as it flows into the vacuum chamber, and a scraper assembly that rotates with the impeller assembly and scrapes away the scale at the joint during rotation.

[0009] Furthermore, the impeller assembly includes a spindle, on which an impeller and a helical guide rail capable of rotating with the spindle are disposed. A first pair of connectors is disposed at the end of the spindle near the vacuum chamber, and a first arc-shaped magnet is disposed at the end of the first pair of connectors away from the spindle.

[0010] The scraper assembly includes a second connector sleeved outside the first arc-shaped magnet. The second connector has a groove with a diameter not less than the outer diameter of the first arc-shaped magnet on the side near the first connector. The second arc-shaped magnet is disposed in the groove. At least one bracket is disposed outside the second connector and rotates with the second connector. The scraper assembly also includes a guide rod that can move along a spiral guide rail. The end of the guide rod away from the impeller passes through the bracket. The bracket has guide holes for the guide rod to move towards and away from the axis of the second connector. The guide rod is provided with a scraper for scraping off scale.

[0011] The first and second arc-shaped magnets have the same magnetic poles at their adjacent ends. The spiral direction of the spiral guide rail is the same as the rotation direction of the impeller. When the first and second arc-shaped magnets are in their natural state, they are not in contact and the scraper is in contact with the transverse section of the pipe wall.

[0012] Furthermore, the scraping mechanism also includes an outer sleeve disposed within the transverse section and movable towards and away from the vacuum chamber. The outer diameter of the outer sleeve is equal to the inner diameter of the transverse section. An inner sleeve, capable of reciprocating along the axial direction of the outer sleeve, is movably disposed within the outer sleeve. The outer diameter of the inner sleeve is equal to the inner diameter of the outer sleeve. An installation groove is provided at the end of the inner sleeve near the vacuum chamber. Multiple water inlet holes communicating with the installation groove are provided on the outer peripheral wall of the inner sleeve. The width of the water inlet holes is not greater than the length of the outer sleeve. A tension spring is provided at the end of the outer sleeve away from the vacuum chamber. A support fixedly installed on the wall of the transverse section is provided at the end of the tension spring away from the outer sleeve. A stop block is also provided on the wall of the transverse section between the support and the inner sleeve. When the tension spring is in its natural state, the inner sleeve contacts the stop block and the water inlet holes are blocked by the outer sleeve. A push rod is provided at the end of the second joint away from the first joint.

[0013] The end of the mandrel away from the first joint is rotatably mounted in the mounting groove, and the end of the bracket away from the second joint is inserted into the inner sleeve. The inner sleeve has a rotary groove for the bracket to rotate.

[0014] Furthermore, the top rod is rotatably provided with an end head at the end away from the second joint, the outer peripheral wall of the inner sleeve is provided with a guide bar that penetrates the outer sleeve, and both ends of the inner sleeve are provided with limiting rings with an outer diameter larger than the inner diameter of the outer sleeve.

[0015] Furthermore, a telescopic rod is provided between the support and the outer tube to restrict the rotation of the outer tube. When the telescopic rod is in its maximum tension state and its end is in contact with the reduced diameter section, the water inlet is located on the outer side of the end of the outer tube away from the reduced diameter section.

[0016] Furthermore, both ends of the outer sleeve are provided with partition plates, and when the telescopic rod is in its maximum tension state, the partition plates divide the horizontal section and the vertical section into two independent chambers.

[0017] The beneficial effects of this invention are reflected in:

[0018] This invention integrates the existing liquid alkali pipeline into the waste acid circulation pipeline and the hydrogen sulfide gas supply pipeline, and installs an electrically controlled valve. The waste acid circulation pipeline and the hydrogen sulfide gas supply pipeline are periodically circulated and cleaned with alkali solution, causing the scale to react and dissolve. This allows the scale in the hydrogen sulfide inlet pipeline to be removed without disassembling the equipment and pipelines. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a structural view of the scraping mechanism of the present invention in its non-operating state;

[0021] Figure 3 This is a structural view of the scraping mechanism of the present invention in its working state;

[0022] Figure 4 This is a structural view of the impeller assembly and scraper assembly of the present invention;

[0023] Figure 5 This is a schematic diagram showing the installation of the first arc-shaped magnet and the second arc-shaped magnet of the present invention;

[0024] Figure 6 This is a schematic diagram showing the installation of the inner sleeve, impeller assembly, and scraper assembly of the present invention.

[0025] In the picture:

[0026] 1. Reactor body; 2. Gas-liquid mixer; 21. Liquid inlet section; 22. Diffusion section; 23. Vacuum chamber; 24. Reduction section; 25. Three-way air inlet section; 3. Three-way connector; 4. Drain pipe; 5. Scraping mechanism; 51. Impeller assembly; 511. Mandrel; 512. Impeller; 513. Spiral guide rail; 514. First connector; 515. First arc magnet; 52. Scraper assembly; 521. Second connector; 522. Second arc magnet; 523. Support; 524. Guide rod; 525. Scraper; 53. Outer sleeve; 54. Inner sleeve; 55. Tension spring; 56. Support; 57. Stop block; 58. Top rod; 6. End; 7. Partition plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-6This invention discloses a gas-liquid enhanced sulfidation reaction device, including a reactor body 1. At least one gas-liquid mixer 2 is provided at the top of the reactor body 1 and inserted into the reactor body 1. A drain pipe 4 for discharging the sulfided liquid is provided at the bottom of the reactor body 1. The gas-liquid mixer 2 includes a liquid inlet section 21 located at the top of the reactor body 1 and a diffusion section 22 located in the reactor body 1. A vacuum chamber 23 is provided between the liquid inlet section 21 and the diffusion section 22. A narrowing section 24 is provided at one end of the liquid inlet section 21 near the vacuum chamber 23 and inserted into the vacuum chamber 23. The gas-liquid mixer 2 also includes a three-way air inlet section 25 connected to the vacuum chamber 23. One end of the three-way air inlet section 25 away from the vacuum chamber 23 is connected to a hydrogen sulfide gas supply pipe, and the other end of the three-way air inlet section 25 away from the vacuum chamber 23 is connected to an alkali solution pipe.

[0029] A three-way connector 3 is provided at the end of the liquid inlet section 21 away from the vacuum chamber 23. The end of the three-way connector 3 away from the liquid inlet section 21 is connected to the waste acid circulation pipeline, and the other end of the three-way connector 3 away from the liquid inlet section 21 is connected to the alkali pipeline. Electric control valves are provided on the alkali pipeline, the waste acid circulation pipeline and the hydrogen sulfide gas supply pipeline.

[0030] This invention integrates the existing liquid alkali pipeline into the waste acid circulation pipeline and the hydrogen sulfide gas supply pipeline, and installs an electrically controlled valve. The waste acid circulation pipeline and the hydrogen sulfide gas supply pipeline are periodically circulated and cleaned with alkali solution, causing the scale to react and dissolve. This allows the scale in the hydrogen sulfide inlet pipeline to be removed without disassembling the equipment and pipelines.

[0031] In one embodiment, the three-way air inlet section 25 consists of a transverse section perpendicular to the liquid inlet section 21 and a vertical section that communicates with and is perpendicular to the transverse section. The transverse section is provided with a scraping mechanism 5 that can assist in scraping off the scale at the connection between the transverse section and the vacuum chamber 23 when the connection is flushed with alkaline solution.

[0032] The scraping mechanism 5 includes an impeller assembly 51 that can be driven to rotate by the alkali as it flows into the vacuum chamber 23, and a scraper assembly 52 that can rotate with the impeller assembly 51 and scrape off the scale at the joint during rotation.

[0033] This design allows the scraping mechanism 5 to be driven by the flow of alkaline solution during alkaline washing, simultaneously scraping away the scale attached to the joints during the alkaline rinsing process, thus accelerating the cleaning efficiency of each scale removal and reducing production downtime.

[0034] In one embodiment, the impeller assembly 51 includes a spindle 511, on which an impeller 512 and a spiral guide rail 513 are provided, which are capable of rotating with the spindle 511. A first connector 514 is provided at one end of the spindle 511 near the vacuum chamber 23, and a first arc-shaped magnet 515 is provided at the other end of the first connector 514 away from the spindle 511.

[0035] The scraper assembly 52 includes a second connector 521 sleeved around the first arc-shaped magnet 515. The second connector 521 has a groove with a diameter not less than the outer diameter of the first arc-shaped magnet 515 on the side near the first connector 514. The second arc-shaped magnet 522 is disposed in the groove. At least one bracket 523 is disposed outside the second connector 521 and rotates with the second connector 521. The scraper assembly 52 also includes a guide rod 524 that can move along the spiral guide rail 513. The end of the guide rod 524 away from the impeller 512 passes through the bracket 523. The bracket 523 has a guide hole for the guide rod 524 to move towards and away from the axis of the second connector 521. The guide rod 524 is provided with a scraper 525 for scraping off scale.

[0036] The first arc magnet 515 and the second arc magnet 522 have the same magnetic pole at their adjacent ends. The spiral direction of the spiral guide rail 513 is the same as the rotation direction of the impeller 512. When the first arc magnet 515 and the second arc magnet 522 are in their natural state, the first arc magnet 515 and the second arc magnet 522 are not in contact and the scraper 525 is in contact with the transverse section pipe wall.

[0037] This design allows the impeller 512 to rotate as the alkali solution flows from the transverse section into the vacuum chamber 23, thereby causing the first connector 514 mounted on the spindle 511 to rotate. Because the first arc-shaped magnet 515 and the second arc-shaped magnet 522 repel each other in the rotational direction, the first arc-shaped magnet 515 can drive the second arc-shaped magnet 522 to rotate without contact, thus driving the scraper 525, which is doubly constrained by the spiral guide rail 513 and the bracket 523, to rotate. This allows the scraper 525 to achieve rotation during its rotation. To remove scale buildup at the joint, since the first arc-shaped magnet 515 and the second arc-shaped magnet 522 are not in contact, when the scraper 525 is blocked by scale and cannot move, the impeller 512 can still continue to rotate at a certain angle, causing the rotating spiral guide rail 513 to change its contact position with the guide rod 524, lifting the guide rod 524, thereby freeing the scraper 525 from the scale blockage. Then, under the repulsive action of the first arc-shaped magnet 515 and the second arc-shaped magnet 522, the scraper 525 rotates back to its original position, thus continuing to scrape the scale buildup at the joint.

[0038] In practice, the scraper 525 can be controlled to maintain a certain distance from the transverse section pipe wall to prevent the scraper 525 from scratching the transverse section pipe wall during long-term rotation.

[0039] In one embodiment, the scraping mechanism 5 further includes an outer sleeve 53 disposed within the transverse section and movable toward and away from the vacuum chamber 23. The outer diameter of the outer sleeve 53 is equal to the inner diameter of the transverse section. An inner sleeve 54, capable of reciprocating along the axial direction of the outer sleeve 53, is movably disposed within the outer sleeve 53. The outer diameter of the inner sleeve 54 is equal to the inner diameter of the outer sleeve 53. An installation groove is provided at the end of the inner sleeve 54 near the vacuum chamber 23. A plurality of water inlet holes communicating with the installation groove are provided on the outer peripheral wall of the inner sleeve 54. The width of the water inlet holes is... The length of the outer tube 53 is not greater than the length of the outer tube 53. A tension spring 55 is provided at the end of the outer tube 53 away from the vacuum chamber 23. A support 56 is fixedly installed on the transverse section tube wall at the end of the tension spring 55 away from the outer tube 53. A stop block 57 is also provided on the transverse section tube wall between the support 56 and the inner sleeve 54. When the tension spring 55 is in its natural state, the inner sleeve 54 is in contact with the stop block 57 and the water inlet is blocked by the outer tube 53. A push rod 58 is provided at the end of the second joint 521 away from the first joint 514.

[0040] The end of the spindle 511 away from the first joint 514 is rotatably mounted in the mounting groove, and the end of the bracket 523 away from the second joint 521 is inserted into the inner sleeve 54. The inner sleeve 54 has a rotary groove for the bracket 523 to rotate.

[0041] This design allows the scraping mechanism 5 to be kept as far away from the connection point as possible when not subjected to alkaline liquid impact, preventing scale generated during the gas-liquid reaction from adhering to the scraping mechanism 5 and affecting its normal operation. When the alkaline liquid enters the transverse section, the water inlet is blocked by the outer sleeve 53, causing the water pressure of the alkaline liquid to push the outer sleeve 53 and the inner sleeve 54 together towards the connection point until the push rod 58 is blocked, at which point the inner sleeve 54 can no longer move. At this time, the scraper assembly 52 has moved into place, and then the outer sleeve 53 continues to move, exposing the water inlet, causing the alkaline liquid to drive the impeller assembly 51 to rotate, thereby achieving the scraping of scale during the alkaline liquid flushing process. After the alkaline liquid supply is cut off, the outer sleeve 53 and the inner sleeve 54 can move back under the action of the tension spring 55.

[0042] In one embodiment, the top rod 58 is rotatably provided with an end head 6 at the end away from the second joint 521, the outer peripheral wall of the inner sleeve 54 is provided with a guide bar that penetrates the outer sleeve 53, and both ends of the inner sleeve 54 are provided with a limiting ring with an outer diameter larger than the inner diameter of the outer sleeve 53.

[0043] This design utilizes the contact of end 6 with the reduced diameter section 24 to reduce the wear of the reduced diameter section 24 caused by the rotation of the push rod 58. By setting guide bars and limit rings, the movement distance and angle of the inner sleeve 54 can be limited, so that the inner sleeve 54 can only move along the set working trajectory, thereby improving the operational stability.

[0044] In one embodiment, a telescopic rod is provided between the support 56 and the outer tube 53 to restrict the rotation of the outer tube 53. When the telescopic rod is in its maximum tension state and its end 6 is in contact with the reduced diameter section 24, the water inlet is located on the outer side of the end of the outer tube 53 away from the reduced diameter section 24.

[0045] Preferably, the telescopic rod is a multi-section telescopic rod, which can reduce the length occupied when retracted.

[0046] In one embodiment, partition plates 7 are provided at both ends of the outer sleeve 53. When the telescopic rod is in its maximum tension state, the partition plates 7 divide the transverse section and the vertical section into two independent chambers.

[0047] This design ensures that when the alkali solution flows into the horizontal section, the partition plate 7 can prevent the alkali solution from flowing into the vertical section, thereby ensuring that the alkali solution flows through the impeller 512 and improving the utilization rate of the alkali solution's power.

[0048] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0050] Additionally, "multiple" refers to two or more.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas-liquid enhanced sulfidation reaction apparatus, characterized in that: The reactor includes a reactor body (1), at least one gas-liquid mixer (2) is provided at the top of the reactor body (1) and inserted into the reactor body (1), and a drain pipe (4) is provided at the bottom of the reactor body (1) for discharging the vulcanized liquid; the gas-liquid mixer (2) includes a liquid inlet section (21) located at the top of the reactor body (1) and a diffusion section (22) located inside the reactor body (1), and a space is provided between the liquid inlet section (21) and the diffusion section (22). The gas-liquid mixer (2) is provided with a vacuum chamber (23). The liquid inlet section (21) is provided with a reduced diameter section (24) that is inserted into the vacuum chamber (23) at one end near the vacuum chamber (23). The gas-liquid mixer (2) also includes a three-way air inlet section (25) that is connected to the vacuum chamber (23). One end of the three-way air inlet section (25) away from the vacuum chamber (23) is connected to a hydrogen sulfide gas supply pipe, and the other end of the three-way air inlet section (25) away from the vacuum chamber (23) is connected to an alkaline solution pipe. A three-way connector (3) is provided at one end of the liquid inlet section (21) away from the vacuum chamber (23). The three-way connector (3) is connected to the waste acid circulation pipeline at one end away from the liquid inlet section (21), and to the alkali pipeline at the other end away from the liquid inlet section (21). An electric control valve is provided on the alkali pipeline, the waste acid circulation pipeline and the hydrogen sulfide gas supply pipeline. The three-way air inlet section (25) consists of a transverse section perpendicular to the liquid inlet section (21) and a vertical section that is connected to and perpendicular to the transverse section. The transverse section is provided with a scraping mechanism (5) that can assist in scraping off the scale at the connection between the transverse section and the vacuum chamber (23) by rinsing with alkaline solution. The scraping mechanism (5) includes an impeller assembly (51) that can be driven to rotate by the alkaline solution as it flows into the vacuum chamber (23) and a scraper assembly (52) that can rotate with the impeller assembly (51) and scrape off the scale at the connection during the rotation. The impeller assembly (51) includes a spindle (511), a first connector (514) is provided at one end of the spindle (511) near the vacuum chamber (23), a first arc-shaped magnet (515) is provided at the other end of the first connector (514) away from the spindle (511), and the scraper assembly (52) includes a second connector (521) sleeved outside the first arc-shaped magnet (515). The scraping mechanism (5) further includes an outer sleeve (53) disposed within the transverse section and movable toward and away from the vacuum chamber (23). The outer diameter of the outer sleeve (53) is equal to the inner diameter of the transverse section. An inner sleeve (54) is movably disposed within the outer sleeve (53) and is capable of reciprocating along the axial direction of the outer sleeve (53). The outer diameter of the inner sleeve (54) is equal to the inner diameter of the outer sleeve (53). An installation groove is provided at the end of the inner sleeve (54) near the vacuum chamber (23). Multiple water inlet holes communicating with the installation groove are provided on the outer peripheral wall of the inner sleeve (54). The width of the water inlet holes is not greater than that of the outer sleeve. (53) length, the outer tube (53) is provided with a tension spring (55) at the end away from the vacuum chamber (23), the tension spring (55) is provided with a support (56) fixedly installed on the transverse section tube wall at the end away from the outer tube (53), the transverse section tube wall is also provided with a stop block (57) located between the support (56) and the inner sleeve (54), when the tension spring (55) is in the natural state, the inner sleeve (54) contacts the stop block (57) and the water inlet is blocked by the outer tube (53), the second pair of connectors (521) is provided with a push rod (58) at the end away from the first pair of connectors (514); When the scraping mechanism (5) is not impacted by the alkaline solution, it can stay as far away from the connection as possible to avoid the scale generated during the gas-liquid reaction from adhering to the scraping mechanism (5). When the alkaline solution enters the transverse section, the water inlet is blocked by the outer sleeve (53), so the water pressure of the alkaline solution will push the outer sleeve (53) and the inner sleeve (54) to move together towards the connection until the top rod (58) is blocked, and the inner sleeve (54) can no longer move. At this time, the scraper assembly (52) has moved into place, and then the outer sleeve (53) continues to move, exposing the water inlet, so that the alkaline solution drives the impeller assembly (51) to run, thereby achieving the scraping of scale during the alkaline solution flushing process. After the alkaline solution supply is cut off, the outer sleeve (53) and the inner sleeve (54) can move back under the action of the tension spring (55).

2. The gas-liquid enhanced sulfidation reaction equipment according to claim 1, characterized in that: The spindle (511) is provided with an impeller (512) and a spiral guide rail (513) that can rotate with the spindle (511). The second pair of connectors (521) has a groove with a diameter not less than the outer diameter of the first arc magnet (515) on the side near the first pair of connectors (514). The groove contains a second arc magnet (522). The second pair of connectors (521) has at least one bracket (523) that rotates with the second pair of connectors (521). The scraper assembly (52) also includes a guide rod (524) that can move along the spiral guide rail (513). The end of the guide rod (524) away from the impeller (512) passes through the bracket (523). The bracket (523) has a guide hole for the guide rod (524) to move towards and away from the axis of the second pair of connectors (521). The guide rod (524) has a scraper (525) for scraping off scale. The first arc magnet (515) and the second arc magnet (522) have the same magnetic pole at their adjacent ends. The spiral direction of the spiral guide rail (513) is the same as the rotation direction of the impeller (512). When the first arc magnet (515) and the second arc magnet (522) are in their natural state, the first arc magnet (515) and the second arc magnet (522) are not in contact and the scraper (525) is in contact with the transverse section pipe wall.

3. The gas-liquid enhanced sulfidation reaction equipment according to claim 2, characterized in that: The mandrel (511) is rotatably mounted in the mounting groove at the end away from the first joint (514), and the bracket (523) is inserted into the inner sleeve (54) at the end away from the second joint (521). The inner sleeve (54) has a rotary groove for the bracket (523) to rotate.

4. The gas-liquid enhanced sulfidation reaction equipment according to claim 2, characterized in that: The top rod (58) is rotatably provided with an end head (6) at the end away from the second joint (521). The outer peripheral wall of the inner sleeve (54) is provided with a guide bar that penetrates the outer sleeve (53). Both ends of the inner sleeve (54) are provided with a limiting ring with an outer diameter larger than the inner diameter of the outer sleeve (53).

5. The gas-liquid enhanced sulfidation reaction equipment according to claim 4, characterized in that: A telescopic rod is provided between the support (56) and the outer tube (53) to restrict the rotation of the outer tube (53). When the telescopic rod is in the maximum tension state and its end (6) is in contact with the reduced diameter section (24), the water inlet is located on the outer side of the end of the outer tube (53) away from the reduced diameter section (24).

6. The gas-liquid enhanced sulfidation reaction equipment according to claim 5, characterized in that: Both ends of the outer tube (53) are provided with partition plates (7). When the telescopic rod is in the maximum tension state, the partition plates (7) divide the horizontal section and the vertical section into two independent chambers.

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