Hydrogen sulfide purification treatment device and treatment process

Abstract

This invention relates to the technical field of hydrogen sulfide purification and treatment, specifically disclosing a hydrogen sulfide purification and treatment device and process, including a buffer tank and an inlet pipe. The buffer tank contains a treatment tank, an intermediate pipe, a circulation pipe, and a control component. The inlet pipe is connected to the bottom of the treatment tank, and a disc-type heating tube is installed inside the treatment tank. An opening at the bottom of the treatment tank mates with the lower end of the intermediate pipe. The circulation pipe connects the intermediate pipe and the inlet pipe. The control component is located inside the intermediate pipe. The liquid entering the treatment tank is heated from bottom to top by the disc-type heating tube. The control component first causes the liquid to reflux through the circulation pipe. After the liquid in the intermediate pipe continues to increase, the control component opens the intermediate pipe, and the liquid is discharged into the buffer tank. The hydrogen sulfide purification and treatment device and process of this invention have the effect of improving the desulfurization reaction efficiency and ensuring the stable, continuous, and safe operation of the entire desulfurization system.

Description

Technical Field

[0001] This invention relates to the technical field of hydrogen sulfide purification and treatment, specifically to a hydrogen sulfide purification and treatment device and process. Background Technology

[0002] Hydrogen sulfide is widely present in aquaculture, chemical industry, and oil and gas production. Because it poses serious hazards to humans, equipment, and the environment, industrial purification of hydrogen sulfide is a necessary step in the production and operation of these industries. In mainstream amine-based desulfurization industrial purification processes, buffer tanks, as core auxiliary equipment, perform multiple key functions. On the one hand, they effectively buffer the flow and pressure fluctuations of the absorber output, stabilizing system operating conditions. On the other hand, they provide sufficient residence time for the rich amine solution, achieving preliminary separation of light hydrocarbons, acidic gases, and other gaseous components, reducing the probability of foaming in the rich amine solution, and preventing gas entrainment from impacting the downstream regeneration tower. Simultaneously, they create a stable suction environment for the rich solution pump, comprehensively protecting production equipment and ensuring the continuous, stable, and efficient operation of the desulfurization system.

[0003] Patent document CN207041955U discloses a buffer tank with a heat exchange coil structure. The tank has fixed legs at the bottom, and a first inlet flange connected to the inner cavity is sealed and fitted onto the side wall of the tank. The core components inside the tank include a spiral heat exchange coil and a vertical exhaust pipe. The lower end of the spiral coil extends out of the tank and is sealed to the second inlet flange, while the upper end extends out of the tank and is sealed to the second outlet flange. The lower end of the vertical exhaust pipe is close to the bottom of the tank, and the upper end extends out of the tank and is sealed to the first outlet flange. This prior art is a buffer tank with a heating function; after the rich amine liquid enters the buffer tank, it can be heated through heat exchange via the spiral coil.

[0004] However, this scheme also has the following problems: Using a coil heat exchange heating mode, the temperature of the heat source entering the coil inlet is much higher than the outlet temperature. Due to the heat exchange characteristics of the coil and the fluid flow pattern, the rich amine liquid inside the tank cannot be uniformly heated, resulting in localized high-temperature and low-temperature zones. Excessively high local temperatures can cause overheating and flash evaporation of the rich amine liquid, while excessively low local temperatures can lead to a significant decrease in degassing efficiency. The combination of these two problems further exacerbates foaming, degradation, and equipment corrosion of the rich amine liquid. Simultaneously, uneven heating directly reduces the gas-liquid separation effect, induces cavitation failure of the rich liquid pump, causes significant fluctuations in the operating conditions of the downstream regeneration tower, and ultimately directly affects the overall desulfurization efficiency, disrupting the operational stability and continuity of the desulfurization system, making it difficult to meet the needs of long-term, high-efficiency industrial production. Summary of the Invention

[0005] This invention provides a hydrogen sulfide purification treatment device and process, which aims to solve the problems of uneven heating of amine-rich liquid caused by traditional coil heat exchange heating, resulting in flash evaporation, foaming, degradation, corrosion, cavitation, low desulfurization efficiency, and unstable system operation.

[0006] In a first aspect, the present invention provides a hydrogen sulfide purification and treatment device, including a buffer tank and an inlet pipe. The buffer tank is equipped with a treatment tank, an intermediate pipe, a circulation pipe, and a control component. The inlet pipe is connected to the bottom of the treatment tank, and a disc heating tube is arranged vertically inside the treatment tank. The intermediate pipe is located at the center of the treatment tank, with its upper end spaced vertically from the upper end of the treatment tank. An opening is provided at the bottom of the treatment tank to match the lower end of the intermediate pipe. The circulation pipe connects the intermediate pipe and the inlet pipe. The control component is located inside the intermediate pipe and is used to control the opening and closing of the intermediate pipe and the circulation pipe. The liquid entering the treatment tank is heated from bottom to top by the disc heating tube. When the liquid level is higher than the upper end of the intermediate pipe, it flows into the intermediate pipe. The control component first causes the liquid to flow back through the circulation pipe. After the liquid level in the intermediate pipe continues to increase, the control component opens the intermediate pipe, and the liquid is discharged into the buffer tank.

[0007] The effect is that the liquid enters directly into the bottom of the treatment tank through the inlet pipe. Inside the treatment tank, disc-shaped heating tubes are arranged vertically. As the liquid continues to flow in, it flows upward through the heating tubes and is gradually heated. As the liquid level in the treatment tank rises, liquid overflows from the upper end of the intermediate pipe into the central pipe. As the liquid level in the intermediate pipe gradually increases, a portion of the pre-heated liquid is first transferred to the inlet pipe for circulation. During this circulation, the liquid in the inlet pipe is preheated, ensuring it has a certain initial temperature when entering the treatment tank. This reduces excessive temperature differences during heating within the tank, improves desulfurization efficiency, and ensures stable, continuous, and safe operation of the entire desulfurization system.

[0008] Preferably, the intermediate tube is divided into an upper connecting part, a middle connecting part, and a lower connecting part from top to bottom; the inner diameter of the lower connecting part is larger than that of the upper connecting part; the middle connecting part has an upper and lower variable diameter structure, and its upper and lower ends are connected to the upper connecting part and the lower connecting part, respectively; the circulation tube is connected to the upper connecting part; the control component includes a control plate that is slidably assembled in the intermediate tube and an elastic element that cooperates with it, the outer periphery of the control plate forms a sliding seal with the inner wall of the upper connecting part, and the elastic element provides an upward reset driving force for the control plate; when the control plate moves to the position below the circulation tube, the circulation tube flow channel is opened; when the control plate moves into the middle connecting part, the main flow channel of the intermediate tube is opened.

[0009] Its effect is that the elastic element is connected to the control plate. As the amount of liquid in the intermediate tube gradually increases, the control plate moves downward under the action of liquid pressure. When the amount of liquid in the intermediate tube increases to the point that the control plate moves below the circulation tube, the control plate opens the circulation tube. At the same time, the control plate can move into the middle connecting part to open the main channel of the intermediate tube.

[0010] Preferably, a mounting bracket is provided inside the intermediate tube; the elastic element includes a slide rod and a spring; the slide rod is slidably mounted on the mounting bracket, and its upper end is connected to the control board; the spring is sleeved on the outside of the slide rod, and its two ends are respectively connected to the control board and the mounting bracket.

[0011] Its effect is that by setting a sliding rod to cooperate with the control board and using a spring to connect with the control board, an upward elastic thrust is provided to the control board, so that the control board can gradually move downward under the action of liquid pressure to overcome the spring force, thereby achieving stable adjustment of the working position of the control board.

[0012] Preferably, a control pump is provided on the circulation pipe, which is used to transport the liquid in the circulation pipe to the inlet pipe.

[0013] Its effect is that by setting up a control pump, a stable power is provided to the liquid in the circulation pipe, enabling it to overcome the internal pressure of the inlet pipe and smoothly flow into the inlet pipe, thereby ensuring that the entire liquid circulation process is continuous and stable, and effectively improving the operational stability of the circulation system.

[0014] Preferably, when the control plate moves from the upper connecting part to the middle connecting part, the liquid level in the middle tube is always below its upper end face.

[0015] Preferably, the disc heating tube is arranged close to the inner wall of the treatment tank, the intermediate tube is located at the center of the disc heating tube, and an impeller is rotatably installed at the bottom of the treatment tank, with the impeller correspondingly arranged in the area between the disc heating tube and the intermediate tube.

[0016] Its effect is that by setting an impeller structure inside the treatment tank, when the liquid enters the treatment tank, the impeller continuously stirs the liquid inside the tank, destroys the temperature stratification and local overheating phenomenon inside the liquid, and promotes the rapid transfer and uniform distribution of heat in the liquid phase, thereby effectively reducing the local temperature difference of the liquid inside the treatment tank and achieving overall uniform heating.

[0017] Preferably, the inlet pipe is arranged along the tangent direction of the impeller's rotation circumference.

[0018] Preferably, an auxiliary sleeve is provided inside the buffer tank, and a guide sleeve is concentrically provided inside the auxiliary sleeve; both the guide sleeve and the auxiliary sleeve are located below the lower connecting part; the center of the guide sleeve protrudes upward, and its protrusion corresponds to the center of the intermediate tube, and the outer side of the guide sleeve is provided close to the inner wall of the auxiliary sleeve.

[0019] Preferably, both the circulation pipe and the liquid inlet pipe are covered with an insulation layer.

[0020] Secondly, the present invention provides a hydrogen sulfide purification process, employing the aforementioned hydrogen sulfide purification device, characterized by comprising the following steps: S1: Liquid is continuously supplied to the bottom of the treatment tank through the inlet pipe, and the liquid level in the treatment tank gradually rises. The liquid is heated by the disc heating tube. S2: When the liquid level in the treatment tank is higher than the opening of the intermediate pipe, the liquid flows into the interior of the intermediate pipe; S3: As the liquid level in the intermediate pipe continues to rise, the pressure on the control plate gradually increases and it moves downward; when the control plate moves to the position below the circulation pipe, the control pump is turned on, and the liquid in the intermediate pipe is transported to the inlet pipe through the circulation pipe to realize liquid circulation; S4: The liquid level in the intermediate pipe continues to rise, and the control plate moves further down to the middle connection part, the intermediate pipe is opened, and the liquid inside flows into the buffer tank.

[0021] Its effect is that by setting up a circulation pipe, the liquid can be circulated and heated. During the circulation process, the liquid with a certain temperature is mixed with the liquid in the inlet pipe, so that the liquid in the inlet pipe has a certain initial temperature, reducing the high temperature difference between the bottom and top areas of the liquid in the treatment tank, improving the desulfurization reaction efficiency, and ensuring the stable operation of the entire system.

[0022] Beneficial effects: This invention, by setting up an inlet pipe, a circulation tank, and an impeller connected to the treatment tank, allows the liquid to enter from the bottom of the treatment tank. The liquid level gradually rises and contacts the disc heating tube for heating, then flows upward through the intermediate pipe, forming a liquid column pressure that drives the control plate. The liquid then flows back to the inlet pipe through the circulation pipe, achieving continuous circulation. Simultaneously, the impact force of the liquid flow generated at the bottom drives the impeller to rotate, agitating and stirring the liquid inside the tank. This expands the heat exchange area between the liquid and the heating tube, prolonging the contact time. Combined with circulation, this eliminates localized high-temperature and low-temperature zones within the tank, achieving uniform heating and stable temperature distribution of the liquid. This enhances the heating effect and mass transfer process, improving desulfurization reaction efficiency and ensuring the long-term stable, continuous, and safe operation of the entire desulfurization system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure at point A in the middle.

[0025] Figure 3 This is a schematic diagram of the internal structure of the processing tank in this invention.

[0026] Figure 4 This is a schematic diagram of the structure of the circulation pipe and the liquid inlet pipe in this invention.

[0027] Figure 5 yes Figure 4 A schematic diagram of the structure at point B.

[0028] Figure 6 This is a schematic diagram of the auxiliary sleeve and guide sleeve in this invention.

[0029] Figure 7 This is a schematic diagram showing the positional relationship between the liquid inlet pipe and the treatment tank in this invention.

[0030] Figure label: 1. Buffer tank; 11. Auxiliary sleeve; 12. Guide sleeve; 2. Inlet pipe; 3. Processing tank; 31. Opening; 4. Intermediate pipe; 41. Upper connection part; 42. Middle connection part; 43. Lower connection part; 5. Circulation pipe; 51. Control pump; 6. Control assembly; 61. Control board; 62. Elastic element; 621. Slide rod; 622. Spring; 7. Disc heating tube; 8. Mounting bracket; 9. Impeller. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1 to 7 As shown, the hydrogen sulfide purification and treatment device of the present invention includes a buffer tank 1, and an inlet pipe 2, a treatment tank 3, an intermediate pipe 4, a circulation pipe 5, and a control component 6 disposed inside the buffer tank 1. The treatment tank 3 is located inside the buffer tank 1. One end of the inlet pipe 2 is located outside the buffer tank 1, and the other end passes through the buffer tank 1 and communicates with the treatment tank 3. The inlet pipe 2 is connected to the bottom of the treatment tank 3 to provide a flow channel for liquid to enter the treatment tank 3. A disc heating tube 7 is arranged vertically inside the treatment tank 3 for continuously heating the liquid inside the treatment tank 3. The intermediate pipe 4 is arranged at the center of the treatment tank 3, and its upper end is vertically spaced from the upper end of the treatment tank 3. An opening 31 adapted to the lower end of the intermediate pipe 4 is opened at the bottom of the treatment tank 3 so that the intermediate pipe 4 can communicate with the bottom area of ​​the treatment tank 3. The circulation pipe 5 connects the intermediate pipe 4 and the inlet pipe 2, and can return the liquid in the intermediate pipe 4 to the inlet pipe 2 to achieve circulation. The control component 6 is installed inside the intermediate pipe 4 and is used to control the switching of the intermediate pipe 4 and the circulation pipe 5.

[0033] During operation, liquid enters buffer tank 1 from the bottom of processing tank 3 through inlet pipe 2, flows upward through disc heating tube 7 and is gradually heated. As the liquid level in processing tank 3 rises, when the liquid level exceeds the upper end of intermediate tube 4, the liquid flows into the interior of intermediate tube 4 from the upper opening 31. As the liquid in intermediate tube 4 gradually increases, control component 6 first opens circulation pipe 5. At this time, the lower end of intermediate tube 4 is closed, allowing the liquid entering intermediate tube 4 to flow back to inlet pipe 2 through circulation pipe 5, mix with the newly entered liquid, and re-enter processing tank 3 for circulating heating. After the liquid in intermediate tube 4 continues to increase and the circulating heating reaches the preset state, control component 6 opens the discharge channel of intermediate tube 4. At this time, both circulation pipe 5 and intermediate tube 4 are open, allowing the liquid that has completed circulating heating to be discharged into buffer tank 1 through intermediate tube 4 for storage, thereby realizing the circulating heating of liquid in a closed space.

[0034] By connecting the circulation pipe 5 to the inlet pipe 2, the pre-heated liquid, having reached a certain temperature, first enters the intermediate pipe 4 and then flows back to the inlet pipe 2 via the circulation pipe 5. This pre-heated liquid mixes with the cryogenic liquid to be treated in the inlet pipe 2, using its own heat to preheat the liquid in the inlet pipe 2, raising the initial temperature of the liquid before it enters the treatment tank 3. After entering the treatment tank 3, under the overall circulation heating mode, the liquid in the treatment tank 3 can continuously flow, exchange heat, and mix, effectively reducing local temperature differences inside the treatment tank 3 and minimizing the appearance of obvious high-temperature and low-temperature zones. By achieving uniform heating of the liquid as a whole, the liquid temperature can be kept stable and uniformly distributed, which is conducive to fully utilizing the optimal operating conditions of the desulfurization reaction, significantly improving desulfurization efficiency, and avoiding adverse effects on the system equipment and reaction process caused by drastic temperature fluctuations or local overheating or overcooling, thereby ensuring the long-term, stable, and safe operation of the entire desulfurization system.

[0035] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 The intermediate tube 4 is divided into three sections from top to bottom along the axial direction: upper connecting part 41, middle connecting part 42 and lower connecting part 43. The sections are coaxial and connected in sequence. The inner diameter of the lower connecting part 43 is larger than that of the upper connecting part 41, forming a stepped inner diameter structure that is thinner at the top and thicker at the bottom. The middle connecting part 42 adopts an upper and lower variable diameter structure. Its upper inner diameter matches the inner diameter of the upper connecting part 41 and is smoothly connected. Its lower inner diameter matches the inner diameter of the lower connecting part 43 and is smoothly connected. Thus, the intermediate tube 4 as a whole forms a variable diameter channel with the inner diameter gradually increasing from top to bottom.

[0036] Reference Figure 4 , Figure 5The circulation pipe 5 is located in the upper region of the intermediate pipe 4 and is connected to the pipe wall of the upper connecting part 41 to form a circulation channel for fluid bypass and return.

[0037] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 The control assembly 6 is assembled inside the intermediate tube 4 and mainly includes a control plate 61 that can slide up and down along the axis of the intermediate tube 4 and an elastic element 62 that provides elastic pushing force to the control plate 61. The outer periphery of the control plate 61 is adapted to the inner wall of the upper connecting part 41, and a sliding seal fit is formed between the two, which can maintain a sealed state during the up and down movement of the control plate 61 to prevent fluid leakage from the control plate 61 and the inner wall of the upper connecting part 41. The elastic element 62 applies an upward elastic force to the control plate 61, providing an upward reset driving force for the control plate 61, so that the control plate 61 can maintain or return to the initial high position when there is no external force or the external force is removed.

[0038] Initially, the control plate 61, driven by the elastic element 62, is located inside the upper connecting part 41 and above the circulation pipe 5. At this time, the circulation pipe 5 is in a closed state, meaning that liquid will not enter the circulation pipe 5. As the liquid in the intermediate pipe 4 increases, when the fluid pressure moves downward to a position below the circulation pipe 5, the control plate 61 will not block the connection between the circulation pipe 5 and the upper connecting part 41. The flow channel of the circulation pipe 5 is in an open state, and the fluid can circulate back through the circulation pipe 5.

[0039] When the control plate 61 continues to move downward and enters the middle connecting part 42, since the inner diameter of the middle connecting part 42 is larger than the inner diameter of the upper connecting part 41, a radial gap is formed between the outer periphery of the control plate 61 and the inner wall of the middle connecting part 42, and the main channel of the intermediate pipe 4 is opened. That is, when the control plate 61 is in the upper connecting part 41, the intermediate pipe 4 is in the closed state, and when the control plate 61 is in the middle connecting part 42, the intermediate pipe 4 is in the open state, and the fluid can pass smoothly from top to bottom along the intermediate pipe 4.

[0040] As the control plate 61 moves from the upper connecting part 41 to the middle connecting part 42, the liquid level inside the intermediate tube 4 remains consistently below its upper end face. Throughout the entire process of liquid preheating and circulation, the liquid level in the intermediate tube 4 remains consistently below the upper end face, preventing overflow or full filling. When the intermediate tube 4 is not open, the amount of liquid inside it steadily increases as more liquid enters. Even when the circulation tube 5 is open, it only diverts a portion of the liquid, slowing the rise of the liquid in the intermediate tube 4, but does not change the overall trend of increasing liquid volume. Once the control plate 61 is in position and the intermediate tube 4 is officially opened, the inflow and outflow of liquid reach a dynamic balance, the liquid level in the intermediate tube 4 no longer changes, and the system enters a stable and balanced operating state.

[0041] Reference Figure 3 , Figure 4 An installation bracket 8 is provided inside the intermediate tube 4. The installation bracket 8 is located at the bottom of the intermediate tube 4, and the structure of the installation bracket 8 will not block the bottom flow channel of the intermediate tube 4, so as to ensure that the liquid can pass through normally.

[0042] Reference Figure 3 , Figure 4 The elastic element 62 includes a slide rod 621 and a spring 622. The slide rod 621 is mounted on the mounting bracket 8 in a slidable manner. The upper end of the slide rod 621 is fixedly connected to the control plate 61, so that the slide rod 621 and the control plate 61 have the same sliding direction. The slide rod 621 can move up and down synchronously with the control plate 61 and guides the movement of the control plate 61. The spring 622 is sleeved on the outside of the slide rod 621. The upper end of the spring 622 is connected to the control plate 61, and the lower end is connected to the mounting bracket 8. The spring 622 is used to provide an upward reset driving force for the control plate 61.

[0043] Initially, under the force of spring 622, control plate 61 is pushed into the upper connecting part 41, at which point both circulation pipe 5 and intermediate pipe 4 are blocked or closed. As the liquid in intermediate pipe 4 increases, the liquid pressure on control plate 61 gradually increases. When the liquid pressure exceeds the force of spring 622, control plate 61 moves downward against the force of spring 622 under pressure, while simultaneously compressing spring 622. During the downward movement of control plate 61, the flow channel of circulation pipe 5 is opened first, followed by the flow channel of intermediate pipe 4, thereby sequentially controlling the on / off state of circulation pipe 5 and intermediate pipe 4 and completing the corresponding fluid switching function.

[0044] To achieve stable liquid circulation and ensure smooth flow of liquid from circulation pipe 5 into inlet pipe 2 for overall circulation, a control pump 51 is installed on circulation pipe 5. The core function of control pump 51 is to provide power to the liquid in circulation pipe 5, directing and pressurizing it to inlet pipe 2. This overcomes the water pressure resistance inside inlet pipe 2, allowing the circulating liquid to smoothly enter and continuously participate in circulation, preventing circulation interruption due to pressure imbalance. Furthermore, for precise control, a controller and sensors are installed. The sensors are infrared sensors mounted on intermediate pipe 4, used to detect the vertical position of control board 61 in real time and determine its operating range. The signal output of the infrared sensor is electrically connected to the signal input of the controller, transmitting the detected position signal to the controller in real time. The control output of the controller is connected to the start / stop control of control pump 51.

[0045] When the infrared sensor detects that the control board 61 has moved below the port of the circulation pipe 5, it immediately sends a position detection signal to the controller. Upon receiving the signal, the controller outputs a control command according to the preset logic, starting the control pump 51. When the control pump 51 is running, it pressurizes the liquid in the intermediate pipe 4 and pumps it to the inlet pipe 2. At the same time, the inlet pipe 2 continues to deliver new liquid to the system steadily.

[0046] With the continuous replenishment of new liquid and the combined effect of the pressurized circulation of the control pump 51, the total liquid volume in the treatment tank 3 steadily increases, and the system forms a positive circulation. As liquid continuously accumulates in the intermediate pipe 4, the liquid level and pressure gradually rise. When the liquid volume reaches a preset threshold, the hydraulic pressure pushes the control plate 61 towards the intermediate connection part 42 until the control plate 61 enters the interior of the intermediate connection part 42, opening the channel of the intermediate pipe 4. At this time, the heated liquid can smoothly pass through the intermediate pipe 4 and be discharged into the buffer tank 1, completing a complete heating, circulation, and drainage process. Moreover, after the main flow channel of the intermediate pipe 4 is opened, the flow rate of liquid discharged through the intermediate pipe 4 is the same as the flow rate of liquid entering through the inlet pipe 2, that is, the amount of liquid entering and exiting is the same, so that the entire circulation system maintains a stable state.

[0047] Both the outer walls of the circulation pipe 5 and the liquid inlet pipe 2 are entirely covered with an insulation layer. By forming a continuous and closed thermal insulation protection on the outer surfaces of the circulation pipe 5 and the liquid inlet pipe 2, the heat exchange between the liquid and the external environment during the circulation process is effectively blocked, heat loss is reduced, and the fluid temperature in the pipeline is kept stable. This ensures that the medium in the liquid inlet pipe 2 can be fully and stably preheated, thereby improving the heat exchange efficiency and circulation stability of the system.

[0048] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 The disc heating tube 7 is arranged close to the inner wall of the processing tank 3, and the intermediate tube 4 is located at the center of the disc heating tube 7. An impeller 9 is rotatably mounted at the bottom of the processing tank 3, and the impeller 9 is correspondingly arranged in the area between the disc heating tube 7 and the intermediate tube 4. The disc heating tube 7 is arranged close to the inner wall of the processing tank 3, and the whole is spirally rising around the outside of the intermediate tube 4. The intermediate tube 4 is vertically set at the center of the disc heating tube 7, and the two are arranged coaxially. The impeller 9 is rotatably mounted at the bottom of the processing tank 3. The impeller 9 is coaxially arranged with the intermediate tube 4 and is located in the annular area between the disc heating tube 7 and the intermediate tube 4, and is located in the lower space inside the processing tank 3.

[0049] When the liquid to be treated is introduced into the treatment tank 3 through the inlet pipe 2, the liquid flow first impacts and acts on the impeller 9, driving the impeller 9 to rotate around its central axis. As the liquid continues to flow in, the liquid level gradually rises from the bottom of the treatment tank 3, and the liquid gradually submerges the disc heating tube 7. The disc heating tube 7 comes into direct contact with the liquid and heats it. At the same time, the continuously flowing liquid continuously acts on the impeller 9, keeping the impeller 9 rotating stably.

[0050] During its rotation, the impeller 9 continuously stirs and agitates the liquid inside the treatment tank 3, breaking the temperature stratification and flow dead zones formed by natural convection. This causes the liquid inside the treatment tank 3 to generate strong mixing and circulation in both the radial and circumferential directions, allowing the liquid to fully and evenly contact the heat exchange surface of the disc heating tube 7. This significantly improves heating efficiency and temperature uniformity, avoids local overheating or uneven heating, and achieves efficient and uniform heating of the liquid inside the treatment tank 3.

[0051] Reference Figure 4 , Figure 7 The liquid inlet pipe 2 is arranged along the tangent of the circumference of the impeller 9, that is, the liquid outlet direction of the liquid inlet pipe 2 is consistent with the circumferential tangent of the outer edge of the impeller 9. When the liquid flows out from the liquid inlet pipe 2 under pressure, its flow direction is tangent to the rotation direction of the impeller 9. It can directly and smoothly rush to the working surface of the impeller 9 blades, avoiding the impact, turbulence and radial eccentric force caused by radial or axial liquid inlet.

[0052] This tangential liquid inlet method results in a smoother flow and lower resistance when the liquid enters the impeller 9 region. It avoids generating additional radial loads or lateral impact forces on the rotating impeller 9, significantly reducing vibration and offset during impeller 9 operation. This allows the impeller 9 to rotate more smoothly and with higher coaxiality during high-speed rotation. Simultaneously, the tangentially inlet liquid and the rotating blades form a co-directional coupling effect, significantly enhancing the shearing, stirring, and turbulence effects of the impeller 9 on the liquid. This leads to faster liquid circulation and more thorough mixing within the cavity, effectively eliminating areas of slow flow or stagnation, resulting in a more uniform temperature distribution within the liquid and ultimately achieving overall uniform heating.

[0053] Reference Figure 1 , Figure 2 , Figure 6 The buffer tank 1 is equipped with an auxiliary sleeve 11, and a guide sleeve 12 is concentrically arranged inside the auxiliary sleeve 11. Both the auxiliary sleeve 11 and the guide sleeve 12 are located below the lower connecting part 43 of the buffer tank 1, forming a nested flow guiding structure with the upper and lower parts coaxial. The guide sleeve 12 has an upward convex flow guiding shape, and its top convex part corresponds to the central axis of the intermediate pipe 4, ensuring that the liquid falling from the intermediate pipe 4 can accurately act on the convex flow guiding surface of the guide sleeve 12. The outer wall surface of the guide sleeve 12 and the inner wall surface of the auxiliary sleeve 11 maintain a uniform and small gap, forming a continuous and stable annular flow channel.

[0054] After flowing downwards from the intermediate pipe 4, the liquid first contacts the upward-protruding guide structure at the center of the guide sleeve 12. Under the guidance of the protruding surface, the liquid is evenly distributed and guided radially outwards. Subsequently, it enters the annular gap between the guide sleeve 12 and the auxiliary sleeve 11, flowing smoothly downwards in a film-like manner along the outer wall of the guide sleeve 12 or the inner wall of the auxiliary sleeve 11, and finally flows into the interior of the buffer tank 1 in a wall-adhering manner. By adopting the upward-protruding guide sleeve 12 structure, the falling liquid can be orderly distributed and guided, avoiding direct impact of the liquid on the liquid surface inside the buffer tank 1 or turbulence and splashing, significantly reducing the foam generated during the liquid entering the buffer tank 1, and improving the stability of the fluid state inside the buffer tank 1.

[0055] By reducing the generation of bubbles in the rich amine liquid in the buffer tank 1, the bubbles are prevented from damaging the gas-liquid separation effect and the stability of liquid level and pressure in the buffer tank 1, thus inhibiting the foaming of the rich amine liquid and preventing gas from being carried into the downstream regeneration tower. At the same time, the core functions of the buffer tank 1, such as buffering and stabilizing pressure, preliminary separation, and protecting the equipment, are ensured, so as to ensure the continuous, stable and efficient operation of the entire desulfurization system.

[0056] The implementation principle of this invention is as follows: Liquid is continuously transported from the bottom of the processing tank 3 to its interior via the inlet pipe 2. As the liquid inlet process continues, the liquid level inside the processing tank 3 gradually rises. The liquid comes into contact with the disc heating tube 7, and is heated under the continuous heating effect of the disc heating tube 7. The heated liquid flows upward into the interior of the intermediate pipe 4 and continues to flow to the space above the control plate 61. As the liquid continuously flows in from above, the liquid column pressure continuously acts on the upper surface of the control plate 61, pushing the control plate 61 to move downward in a set direction. When the control plate 61 moves down to the position below the port where the circulation pipe 5 connects to the intermediate pipe 4, the corresponding control logic is triggered, and the control pump 51 starts running, transporting the liquid inside the intermediate pipe 4 back to the inlet pipe 2 through the circulation pipe 5. After merging with the newly entered liquid, it re-enters the processing tank 3, forming a circulating flow. At the same time, when the liquid enters the bottom of the treatment tank 3 from the inlet pipe 2, it will generate a directional liquid flow impact force, which will drive the impeller 9 arranged at the bottom of the treatment tank 3 to rotate. During the rotation, the impeller 9 will disturb and stir the liquid in the treatment tank 3, so that the liquid is heated evenly in the treatment tank 3. The heat exchange area and contact time with the disc heating tube 7 will be significantly increased, which will enhance the heating effect and mass transfer process, thereby improving the desulfurization reaction efficiency and ensuring that the entire desulfurization system operates in a stable and continuous state.

[0057] The present invention also discloses a hydrogen sulfide purification process, which uses the above-mentioned hydrogen sulfide purification device.

[0058] A hydrogen sulfide purification process includes the following steps: S1: Liquid is continuously supplied to the bottom of the treatment tank 3 through the inlet pipe 2, and the liquid level in the treatment tank 3 gradually rises. The liquid is heated by the disc heating tube 7. S2: When the liquid level in the treatment tank 3 is higher than the opening of the intermediate pipe 4, the liquid flows into the interior of the intermediate pipe 4. S3: The liquid level in the intermediate pipe 4 continues to rise, the pressure on the control plate 61 gradually increases and it moves downward; when the control plate 61 moves to the position below the circulation pipe 5, the control pump 51 is turned on, and the liquid in the intermediate pipe 4 is transported to the inlet pipe 2 through the circulation pipe 5 to realize liquid circulation. S4: The liquid level in the intermediate pipe 4 continues to rise, and the control plate 61 moves further down to the interior of the intermediate connection part 42, the intermediate pipe 4 is opened, and the liquid inside it flows into the buffer tank 1.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydrogen sulfide purification and treatment device, comprising a buffer tank and an inlet pipe, characterized in that, The buffer tank contains a processing tank, an intermediate pipe, a circulation pipe, and a control component. The inlet pipe is connected to the bottom of the processing tank, and a disc-shaped heating element is installed vertically inside the processing tank. The intermediate pipe is located at the center of the processing tank, with its upper end spaced vertically from the upper end of the processing tank. An opening at the bottom of the processing tank matches the lower end of the intermediate pipe. The circulation pipe connects the intermediate pipe and the inlet pipe. The control component is located inside the intermediate pipe and is used to control the opening and closing of the intermediate pipe and the circulation pipe. The liquid entering the processing tank is heated from bottom to top by the disc-shaped heating element. When the liquid level is higher than the upper end of the intermediate pipe, it flows into the intermediate pipe. The control component first causes the liquid to return through the circulation pipe. After the liquid level in the intermediate pipe continues to increase, the control component opens the intermediate pipe, and the liquid is discharged into the buffer tank.

2. The hydrogen sulfide purification and treatment device according to claim 1, characterized in that, The intermediate tube is divided into an upper connecting part, a middle connecting part, and a lower connecting part from top to bottom; the inner diameter of the lower connecting part is larger than that of the upper connecting part; the middle connecting part has an upper and lower variable diameter structure, and its upper and lower ends are connected to the upper connecting part and the lower connecting part, respectively; the circulation tube is connected to the upper connecting part; the control component includes a control plate that slides up and down in the intermediate tube and an elastic element that cooperates with it. The outer periphery of the control plate forms a sliding seal with the inner wall of the upper connecting part, and the elastic element provides an upward reset driving force for the control plate; when the control plate moves to the position below the circulation tube, the circulation tube flow channel is opened; when the control plate moves into the middle connecting part, the main flow channel of the intermediate tube is opened.

3. The hydrogen sulfide purification and treatment device according to claim 2, characterized in that, The intermediate tube is equipped with a mounting bracket; the elastic components include a slide rod and a spring; the slide rod is slidably mounted on the mounting bracket, and its upper end is connected to the control board; the spring is sleeved on the outside of the slide rod, and its two ends are respectively connected to the control board and the mounting bracket.

4. The hydrogen sulfide purification and treatment device according to claim 2, characterized in that, A control pump is installed on the circulation pipe, which is used to transport the liquid in the circulation pipe to the inlet pipe.

5. The hydrogen sulfide purification and treatment device according to claim 2, characterized in that, When the control panel moves from the upper connection to the middle connection, the liquid level in the middle tube is always below its upper end face.

6. The hydrogen sulfide purification and treatment device according to claim 1, characterized in that, The disc heating tubes are arranged close to the inner wall of the treatment tank, and the intermediate tube is located at the center of the disc heating tubes. An impeller is rotatably installed at the bottom of the treatment tank, and the impeller is correspondingly arranged in the area between the disc heating tubes and the intermediate tube.

7. The hydrogen sulfide purification and treatment device according to claim 6, characterized in that, The inlet pipe is set along the tangent direction of the impeller's rotation circumference.

8. The hydrogen sulfide purification and treatment device according to claim 2, characterized in that, An auxiliary sleeve is installed inside the buffer tank, and a guide sleeve is concentrically installed inside the auxiliary sleeve; both the guide sleeve and the auxiliary sleeve are located below the lower connecting part; the center of the guide sleeve protrudes upward, and its protrusion corresponds to the center of the intermediate tube; the outer side of the guide sleeve is located close to the inner wall of the auxiliary sleeve.

9. The hydrogen sulfide purification and treatment device according to claim 1, characterized in that, Both the circulation pipe and the liquid inlet pipe are covered with an insulation layer.

10. A hydrogen sulfide purification process, employing the hydrogen sulfide purification device as described in claim 4, characterized in that, Includes the following steps: S1: Liquid is continuously supplied to the bottom of the treatment tank through the inlet pipe, and the liquid level in the treatment tank gradually rises. The liquid is heated by the disc heating tube. S2: When the liquid level in the treatment tank is higher than the opening of the intermediate pipe, the liquid flows into the interior of the intermediate pipe; S3: As the liquid level in the intermediate pipe continues to rise, the pressure on the control plate gradually increases and it moves downward; when the control plate moves to the position below the circulation pipe, the control pump is turned on, and the liquid in the intermediate pipe is transported to the inlet pipe through the circulation pipe to realize liquid circulation; S4: The liquid level in the intermediate pipe continues to rise, and the control plate moves further down to the middle connection part, the intermediate pipe is opened, and the liquid inside flows into the buffer tank.

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