Sulfur refining device for desulfurized and purified natural gas

Abstract

The utility model provides a device for refining sulfur after desulfurization and purification of natural gas, and belongs to the technical field of energy-saving and environment-friendly equipment. The sulfur refining device comprises a sulfur melting kettle, the sulfur melting kettle is a tank body, the tank body is provided with a separation area, a dehydration area and a sulfur melting area which are sequentially communicated from top to bottom, a feed port of the separation area is communicated with a regeneration tank for conveying sulfur slurry, and a discharge port of the sulfur melting area is communicated with a sulfur slicing machine; the infrared heating assembly comprises an infrared heater, and an infrared radiation heating area of the infrared heater is arranged on the outer side wall of the sulfur melting kettle in a surrounding manner corresponding to the separation area and the dehydration area of the sulfur melting kettle; and the bottom of the sulfur melting kettle is also provided with a settling area which is communicated with the sulfur melting area and is used for collecting sulfur slag. According to the utility model, the problem of non-uniform heating of the coil pipe matched with the sulfur melting process is solved, infrared radiation is used for heating, the heating speed is high, the efficiency is high, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a sulfur refining device, belonging to the technical field of energy-saving and environmentally friendly equipment. Background Art

[0002] With the development of global industry, energy demand is increasing. Natural gas, as a green and clean energy source, has become a key energy source for sustainable energy and environmental development, and its development and utilization are receiving increasing attention. To develop the natural gas industry, it is also necessary to study its purification technology, solve the problems of natural gas transportation, storage, and harmless utilization, and especially remove sulfides from natural gas to reduce pollution at the source.

[0003] Currently, natural gas desulfurization uses the MDEA method to separate the impurity gases H2S and CO2. MDEA, chemically known as methyldiethanolamine, is typically used in a 25%-50% by mass MDEA solution to desulfurize and purify natural gas. When H2S in natural gas passes through the MDEA solution, it undergoes a rapid chemical reaction, removing the H2S. This process is also known as chemical absorption. CO2, also an acidic gas, also reacts with MDEA and is absorbed. The absorption liquid is heated under negative pressure, releasing the absorbed H2S and some CO2 for collection and processing. This acidic gas, with a hydrogen sulfide content exceeding 40%, is further desulfurized using a complex iron desulfurization process, converting the H2S into elemental sulfur and separating it from the system, eliminating the H2S.

[0004] Currently, sulfur extraction technologies used in conjunction with chelated iron desulfurization technology often utilize plate and frame filter presses. The resulting wet sulfur paste, with a moisture content of 30-50%, is typically treated as solid waste and disposed of by companies certified for hazardous waste treatment. This method not only fails to recycle the sulfur, but also increases costs due to the loss of reagents caused by the inclusion of liquids. Furthermore, hazardous waste disposal is a significant expense.

[0005] Of course, using a molten sulfur kettle for sulfur refining is a relatively common sulfur resource processing method, but the conventional process requires steam heating, so it is necessary to cooperate with the construction of a professional steam utilization system. For natural gas well stations, sulfur production does not last long, and the problem of gas outage will occur after a few years at least and more than ten years at most. If the initial construction cost is too high, the rate of return will be low, especially for small and medium-sized gas fields. Moreover, the molten sulfur kettle uses steam heating, mainly coil heating, and the heat distribution is uneven. The farther away from the coil, the lower the temperature and the worse the thermal effect. This can easily cause problems such as uneven solid-liquid heating, local vaporization stirring the liquid layer, and slow solid settling rate. Currently, there is no particularly good heat dissipation device.

[0006] Based on the above situation, a new sulfur refining device is needed that can be applied to natural gas well stations, reduce costs and reduce hazardous waste generation. Utility Model Content

[0007] In order to solve the above problems, the purpose of the utility model is to provide a sulfur refining device for natural gas desulfurization and purification, which solves the problems of high-cost steam heating and uneven coil heating required for the current complex iron desulfurization process and the sulfur melting process. It uses infrared radiation for heating, which has fast heating speed and high efficiency, reduces production costs, and saves energy.

[0008] To achieve the above-mentioned purpose, the present invention provides a sulfur refining device for natural gas desulfurization and purification, which specifically includes the following technical solutions:

[0009] A sulfur refining device for natural gas desulfurization and purification, comprising:

[0010] The sulfur melting kettle is a tank body having a separation zone, a dehydration zone and a sulfur melting zone which are sequentially connected from top to bottom. The feed port of the separation zone is connected to a regeneration tank for conveying sulfur slurry. The liquid sulfur flowing out of the discharge port of the sulfur melting zone is transferred to a sulfur slicer through a pipeline.

[0011] An infrared heating assembly, comprising an infrared heater, wherein the infrared radiation heating area of ​​the infrared heater corresponds to the separation area and the dehydration area of ​​the molten sulfur kettle and is arranged around the outer wall of the molten sulfur kettle;

[0012] The bottom of the sulfur melting kettle is also provided with a sedimentation area connected to the sulfur melting area for collecting sulfur slag.

[0013] The adjacent ends of the outer side walls of the separation zone, dehydration zone, sulfur melting zone and sedimentation zone are connected by flanges, thereby facilitating installation and maintenance.

[0014] A further improvement of the present invention is that the infrared heater is disposed on the outer wall of the molten sulfur kettle via an annular outer shell. The infrared heater's heating element is located inside the annular wall of the shell, and the outer wall of the shell is covered with an insulating layer. This allows the infrared heater to rapidly heat the sulfur slurry, accelerating the separation of solid sulfur particles from the desulfurization liquid. The insulating layer reduces heat loss and improves heat utilization.

[0015] A further improvement of the present invention is that the separation zone is located at the upper part of the molten sulfur kettle, an exhaust pipe is provided on the inner side wall of the molten sulfur kettle located in the separation zone, a clear liquid baffle is provided in the central axis of the separation zone to accelerate the solid-liquid separation, and the feed port of the separation zone is connected to the side of the clear liquid baffle where the solid particles of sulfur slurry are deposited; the other side of the clear liquid baffle where the clear liquid is retained is connected to one end of the sulfur slurry clear liquid pump. The clear liquid baffle reduces the solid-liquid agitation caused by the impact of the sulfur slurry on the separation liquid layer, improves the separation effect of the desulfurization liquid and the sulfur particles, and shortens the separation time. The other end of the sulfur slurry clear liquid pump is connected to the regeneration tank after passing through the tubular heat exchanger, whereby the clear liquid is cooled through the tubular heat exchanger and refluxed to the regeneration tank for reuse, thereby reducing losses. Below the clear liquid baffle is the discharge port of the separation zone.

[0016] A further improvement of the present invention is that the dehydration zone includes a primary guide plate at the bottom of the separation zone serving as a discharge port, and a secondary guide plate located below the dehydration zone. The primary guide plate is a funnel structure with an exhaust duct inserted through it. A diverter structure is provided at the discharge port at the bottom of the primary guide plate via a fixed bracket. Thus, the gap between the diverter structure and the discharge port controls the discharge progress from the separation zone to the dehydration zone.

[0017] A further improvement of the present invention is that the diversion structure includes a flow limiting angle and a flow blocking angle arranged in upper and lower layers. The top surface of the flow limiting angle is an umbrella-shaped surface, which is used to abut and block the blanking opening of the first-level guide plate. The bottom surface of the flow limiting angle is fixed with multiple vertically arranged positioning columns.

[0018] A further improvement of the present utility model is that the fixed bracket includes a vertically arranged connecting arm, one end of the connecting arm is fixedly set on the bottom surface of the first-level guide plate; the other end of the connecting arm is fixedly connected to the choke angle, and the upper end surface of the choke angle is vertically provided with a positioning groove that cooperates with the positioning column, a spring is pressed in the positioning groove, and the other end of the spring is fixedly sleeved on the positioning column.

[0019] A further improvement of the present invention is that the sulfur melting zone is located below the secondary guide plate and connected to the dehydration zone, and multiple layers of heating pipes filled with heat transfer oil are arranged in the sulfur melting zone to ensure that the granular sulfur or semi-molten sulfur is melted into liquid sulfur.

[0020] A further improvement of the present invention is that the outer wall of the settling area is provided with multiple layers of heating pipes filled with heat transfer oil, and a filter is provided at the bottom of the settling area to remove impurities from the sulfur slag and recycle it.

[0021] The beneficial effects of the utility model are:

[0022] This utility model is used to further refine sulfur from the desulfurized and purified natural gas, completing sulfur resource utilization. This utility model can address the current issues of high-cost steam heating and uneven coil heating required for the sulfur melting process in conjunction with the complex iron desulfurization process. By optimizing and improving the sulfur melting kettle equipment, it improves the sulfur slurry solid-liquid separation efficiency, increases the added value of sulfur, and reduces sulfur production costs.

[0023] Aiming at the characteristics of the natural gas desulfurization process, such as the short sulfur production cycle and the high cost of laying steam equipment, the utility model fully utilizes the natural gas advantages of the natural gas well station itself and designs a sulfur melting system that uses the heat of natural gas combustion to control the temperature. It can produce high-quality sulfur, reduce costs, fully utilize resources, and reduce the generation of hazardous waste.

[0024] This utility model uses a natural gas infrared heater, utilizing the principle of infrared radiation heating, to heat the contents of the molten sulfur kettle. During the heating process, infrared radiation penetrates the side walls of the molten sulfur kettle, heating the sulfur slurry. This heating method offers rapid heating, high efficiency, uniform temperature, and energy savings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Figure 1 This is a schematic diagram of the structure of the utility model, in which the arrows indicate the direction of material flow;

[0027] Figure 2 This is a schematic diagram of the separation zone structure of the utility model;

[0028] Figure 3 This is a top view of the separation area of ​​the utility model;

[0029] Figure 4 This is a schematic diagram of the connection between the primary guide plate and the diversion structure of the utility model;

[0030] Figure 5 This is a schematic diagram of the diversion structure of the utility model;

[0031] Figure 6 This is a top view of the flow blocking angle of the utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the infrared heating component of the utility model.

[0033] Description of Reference Numerals

[0034] 1. Molten sulfur kettle; 2. Infrared heating assembly; 2-1. Infrared heater; 2-2. Housing; 2-3. Infrared radiation panel; 3. Sulfur slurry clear liquid pump; 4. Regeneration tank; 5. Clear liquid baffle; 6. Exhaust pipe; 7. Diversion structure; 7-1. Flow restriction angle; 7-2. Flow blocking angle; 8. Primary guide plate; 9. Secondary guide plate; 10. Drain pipe; 11. Thermal oil pump; 12. Thermal oil furnace; 13. Feed pipe; 14. Discharge pipe; 15. Blanking opening; 16. Fixing bracket; 16-1. Positioning column; 16-2. Spring; 16-3. Positioning groove; 16-4. Positioning concave ring; 17. Flange; 18. Tubular heat exchanger;

[0035] A. Separation zone; B. Dehydration zone; C. Molten sulfur zone; D. Sedimentation zone;

[0036] a. Sulfur slurry; b. Clear liquid; c. Tail gas; d. Sulfur slag; f. Liquid sulfur; g. Emergency storage liquid. DETAILED DESCRIPTION

[0037] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] The directions or their approximate terms described throughout the present invention, such as "upper (top)", "lower (bottom)", "inner", "outer", "side", etc., are mainly with reference to the directions of the accompanying drawings. Each direction or its approximate terms are only used to assist in explaining and understanding the embodiments of the present invention and are not used to limit the present invention.

[0039] The utility model is a sulfur refining device for natural gas after desulfurization and purification, such as Figure 1 As shown, it mainly includes a sulfur melting kettle 1, an infrared heating component 2, an exhaust pipe 6 and a thermal oil furnace 12. Among them, the infrared heating component 2 is arranged on the upper part of the outer wall of the sulfur melting kettle 1, the exhaust pipe 6 is arranged on the upper part of the inner wall of the sulfur melting kettle 1, and the thermal oil furnace 12 heats the thermal oil filled in the heating pipe at the lower part of the sulfur melting kettle 1.

[0040] The molten sulfur kettle 1 in the utility model is a tank body, the structure of which is shown in FIG. Figures 1-6The tank body has a separation zone A, a dehydration zone B, a sulfur melting zone C and a sedimentation zone D which are sequentially connected from top to bottom. Specifically, the separation zone A, the dehydration zone B, the sulfur melting zone C and the sedimentation zone D of the sulfur melting kettle 1 adopt a segmented structure, and the adjacent ends of the outer walls of adjacent sections are connected by flanges 17, which is convenient for installation and maintenance. The separation zone A is provided with a feed port of the sulfur melting kettle 1, and the feed port of the separation zone A is connected to the regeneration tank 4, and the sulfur slurry a is transported to the sulfur melting kettle through the feed port. In order to further improve the efficiency, a tubular heat exchanger 18 can be provided between the regeneration tank 4 and the feed port of the separation zone A, and the tubular heat exchanger 18 is used to preliminarily heat and increase the temperature of the sulfur slurry a. The separation zone A, the dehydration zone B, the sulfur melting zone C and the sedimentation zone D are respectively provided with a discharge port, and the liquid sulfur f produced in the sulfur melting kettle 1 is transferred from the discharge port of the sulfur melting zone C to the sulfur slicer for subsequent production.

[0041] In the present invention, the infrared heating assembly 2 includes an infrared heater 2-1 and a housing 2-2. The infrared radiation heating area of ​​the external heater 2-1 corresponds to the separation area A and the dehydration area B of the molten sulfur kettle 1 and is arranged around the outer wall of the molten sulfur kettle 1. Figure 1 Specifically, combined with Figure 7 The infrared heater 2-1 is encircled by an annular housing 2-2 and positioned on the outer wall of the molten sulfur kettle 1. Inside the annular wall of the housing 2-2, infrared radiation panels 2-3, the heating elements of the infrared heater 2-1, are positioned. The number and power of the heating elements are determined based on the required heat in the molten sulfur kettle 1. The outer side of the annular wall of the housing 2-2 is covered with an insulation layer made of a conventional insulating material, such as glass fiber wool, to reduce heat loss and improve heat utilization.

[0042] Separation zone A is located at the upper part of the molten sulfur kettle 1. The main structure of separation zone A is as follows: Figure 1 、 Figure 2 and Figure 3 As shown, the feed inlet of separation zone A is provided with a feed pipe 13, which connects to the regeneration tank 4 via a tubular heat exchanger 18. The sulfur slurry a in the regeneration tank 4 is pumped into the tubular heat exchanger 18 for initial heating before being transported to the molten sulfur kettle 1 via the feed pipe 13. A clear liquid baffle 5 is axially positioned in the center of separation zone A to accelerate solid-liquid separation. Below clear liquid baffle 5 is the discharge port of separation zone A, namely, the primary guide plate 8, with a discharge opening 15 at its center.

[0043] Specifically, in the upper part of separation zone A, the sulfur slurry a is rapidly heated to 70-90°C by an infrared heater 2-1, accelerating the separation of the sulfur slurry solid particles from the desulfurization clear liquid. In this embodiment, the main components of the desulfurization clear liquid are complex iron, thiosulfate, sulfate, carbonate, and bicarbonate. Furthermore, the sulfur slurry solid particles at this time are in a solid-liquid coated state. The solid particles are loose and wrapped with water molecules. After heating, the movement of water molecules and sulfur molecules intensifies, making the solid particles more completely separated from the liquid. The sulfur particles are more likely to aggregate with other particles and become larger, thereby gradually sinking, achieving solid-liquid separation. The feed pipe 13 of separation zone A is connected to the side of the clear liquid baffle 5 where the sulfur slurry solid particles are deposited; the other side of the clear liquid baffle 5 where the clear liquid is retained is connected to one end of the sulfur slurry clear liquid pump 3, and the other end of the sulfur slurry clear liquid pump 3 is connected to the inlet of the tubular heat exchanger 18, and the outlet of the tubular heat exchanger 18 is connected to the regeneration tank 4. In the middle of separation zone A, a clear liquid baffle 5 reduces the solid-liquid agitation caused by the impact of sulfur slurry a on the separation liquid layer, forming a static stratification zone, improving the separation of desulfurized liquid and solid particles, and shortening separation time. A discharge pipe 14 is provided at the discharge port of separation zone A. This pipe 14 connects to the sulfur slurry clear liquid pump 3. Clear liquid b, passing through the sulfur slurry clear liquid pump 3, is directed to a tubular heat exchanger 18 for cooling before returning to the regeneration tank 4, allowing it to be reused. Using the tubular heat exchanger 18 to lower the temperature of clear liquid b not only prevents excessively high temperatures from adversely affecting the operation of the regeneration tank 4, but also provides thermal energy for heating the sulfur slurry a flowing through the tubular heat exchanger 18.

[0044] An exhaust pipe 6 is provided on the inner wall of the molten sulfur kettle 1 in the separation zone A. The exhaust pipe 6 is a plurality of circular tubes, which are evenly distributed on the inner wall of the molten sulfur kettle 1 in the separation zone A. The top of the exhaust pipe 6 is located above the liquid level to prevent liquid backflow. A liquid level gauge can be provided on the inner wall of the separation zone A to monitor the liquid level.

[0045] Dehydration zone B is located below separation zone A. The structure of dehydration zone B is as follows: Figure 1 、 Figure 4-Figure 6 As shown, dehydration zone B includes a primary guide plate 8, which serves as a feed port at the bottom of separation zone A, and a secondary guide plate 9 located below dehydration zone B. The primary guide plate 8 is a funnel structure with through holes formed around its outer periphery. The lower end of the exhaust duct 6 is inserted through the primary guide plate 8 and extends into dehydration zone B. The structure of the secondary guide plate 9 is similar to that of the primary guide plate 8.

[0046] The outer wall of the dehydration zone B is also provided with an infrared radiation plate 2-3 of the heating element of the infrared heater 2-1. By controlling the output power of the heating element, the solid particles are quickly heated and dried, and the entrained moisture is converted into water vapor and rises from the exhaust pipe 6 to the top of the sulfur melting kettle 1, and together with the water vapor and other impurity gases emitted from the separation zone A, it constitutes the exhaust gas c, which is passed into the exhaust gas treatment system from the exhaust gas collection pipe at the top of the sulfur melting kettle 1 for unified treatment.

[0047] The blanking opening 15 at the bottom of the first-level guide plate 8 is abutted against the diversion structure 7 through a fixed bracket 16. Figure 4 、 Figure 5 and Figure 6 As shown, the diversion structure 7 includes a flow limiting angle 7-1 and a flow blocking angle 7-2 arranged in upper and lower layers. The fixed bracket 16 includes a vertically arranged connecting arm, one end of which is fixedly mounted on the bottom surface of the first-stage guide plate 8; the other end of the connecting arm is fixedly connected to the flow blocking angle 7-2. The top surface of the flow limiting angle 7-1 is an umbrella-shaped surface, which is used to abut and block the blanking opening 15 of the first-stage guide plate 8. The bottom surface of the flow limiting angle 7-1 is fixedly mounted with multiple vertically arranged positioning posts 16-1. The upper end surface of the flow blocking angle 7-2 is vertically provided with a positioning groove 16-3 that cooperates with the positioning posts 16-1. The positioning groove 16-3 is pressed into a spring 16-2, the other end of which is fixedly mounted on the positioning post 16-1. The flow blocking angle 7-2 is also provided with a positioning groove 16-4, and the connecting arm is embedded in the positioning groove 16-4 to fix the flow blocking angle 7-2. Through this design, the discharge speed and flow rate of the discharge port of separation zone A can be controlled. Specifically, the flow limiting angle 7-1 can control the expansion and contraction of the spring 16-2 according to the amount of material in separation zone A. The more material there is, the greater the gravity. The compression spring 16-2 increases the gap between the flow limiting angle 7-1 and the discharge opening 15, the discharge area becomes larger, and the discharge speed is accelerated. When there is no material or less material, the pressure on the spring 16-2 is small, and the flow limiting angle 7-1 is supported upward by the restoring force, blocking the discharge opening 15, and no more material is discharged. When the car is just started, the separation zone A does not discharge the sulfur slurry a from the molten sulfur kettle 1 into the dehydration zone B in the early stage of feeding. The sulfur slurry a that has just entered the separation zone A has more time to undergo sedimentation and separation, reducing the impact of start-up and shutdown on the system.

[0048] Furthermore, a discharge port and drainage pipe 10 are provided at the bottom of dehydration zone B, connected to an emergency liquid storage tank, to discharge the emergency liquid g and prevent accumulation in dehydration zone B. A diversion structure 7 also prevents water vapor from impacting the discharge port of separation zone A, ensuring smooth entry of solid particles into dehydration zone B. Heated by infrared heater 2-1, the solid particles, in a granular or semi-molten state, enter the lower sulfur melting zone C through a secondary drainage plate 9 with a sloped funnel structure.

[0049] The sulfur melting zone C is located below the secondary drainage plate 9 and is connected to the dehydration zone B. Multiple layers of heating pipes filled with thermal oil are installed within the sulfur melting zone C. The ends of the heating pipes extend to connect to an external thermal oil furnace 12 and a thermal oil pump 11. After the granular or semi-molten sulfur enters the sulfur melting zone C, it is heated by thermal oil to ensure that it melts into a liquid state. This thermal oil is heated by a natural gas thermal oil furnace 12, and the temperature is controlled at 130-150°C, which liquefies the sulfur without causing overheating side reactions. A discharge port is provided at the bottom of the sulfur melting zone C, connecting to a sulfur slicer. The liquid sulfur f discharged from the sulfur melting kettle 1 is then transferred to the next process to be made into high-content solid sulfur flakes for packaging.

[0050] Settling zone D, located at the bottom of the sulfur melting kettle 1 and connected to the sulfur melting zone C, collects the sulfur slag d. The outer walls of settling zone D are equipped with multiple layers of heating pipes filled with thermal oil. A filter is located at the bottom of settling zone D to remove impurities from the sulfur slag d for recycling.

[0051] The utility model is widely used in the resource utilization of sulfur after desulfurization of natural gas. The infrared heater 2-1 and the thermal oil furnace 12 used as heating equipment both use natural gas combustion for heating, avoiding the use of a steam heating system with complicated process technology. The natural gas is mined and purified by the well station, saving the natural gas transportation cost. At the same time, the infrared heating technology is adopted to greatly improve the solution heating speed and uniformity, and accelerate the solid-liquid separation speed.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sulfur refining device for natural gas desulfurization and purification, characterized in that: include: A sulfur melting kettle (1) is a tank body having a separation zone (A), a dehydration zone (B) and a sulfur melting zone (C) which are sequentially connected from top to bottom. The feed port of the separation zone (A) is connected to a regeneration tank (4) for conveying sulfur slurry (a). Liquid sulfur (f) flowing out of the discharge port of the sulfur melting zone (C) is transferred to a sulfur slicer through a pipeline. An infrared heating assembly (2), the infrared heating assembly (2) comprising an infrared heater (2-1), the infrared radiation heating area of ​​the infrared heater (2-1) corresponding to the separation area (A) and the dehydration area (B) of the molten sulfur kettle (1), and arranged around the outer wall of the molten sulfur kettle (1); The bottom of the sulfur melting kettle (1) is also provided with a sedimentation zone (D) connected to the sulfur melting zone (C) for collecting sulfur slag (d).

2. The sulfur refining device for natural gas desulfurization and purification according to claim 1, characterized in that: The infrared heater (2-1) is arranged on the outer wall of the molten sulfur kettle (1) by means of an annular shell (2-2), a heating element of the infrared heater (2-1) is arranged on the inner side of the annular wall of the shell (2-2), and an outer side of the annular wall of the shell (2-2) is covered with a heat-insulating layer.

3. The sulfur refining device for natural gas desulfurization and purification according to claim 1, characterized in that: The separation zone (A) is located at the upper part of the molten sulfur kettle (1), an exhaust pipe (6) is provided on the inner side wall of the molten sulfur kettle (1) located in the separation zone (A), a clear liquid baffle (5) capable of accelerating solid-liquid separation is provided in the central axial direction of the separation zone (A), and a discharge port of the separation zone (A) is located below the clear liquid baffle (5).

4. The sulfur refining device for natural gas desulfurization and purification according to claim 3, characterized in that: The feed inlet of the separation zone (A) is connected to one side of the clear liquid baffle (5) where solid particles of sulfur slurry are deposited; the other side of the clear liquid baffle (5) where clear liquid is retained is connected to one end of a sulfur slurry clear liquid pump (3); and the other end of the sulfur slurry clear liquid pump (3) is connected to the regeneration tank (4) after passing through a tubular heat exchanger (18).

5. The sulfur refining device for natural gas desulfurization and purification according to claim 4, characterized in that: The dehydration zone (B) comprises a primary guide plate (8) provided at the bottom of the separation zone (A) as a discharge port and a secondary guide plate (9) located at the lower part of the dehydration zone (B). The primary guide plate (8) is a funnel structure. An exhaust pipe (6) is inserted through the primary guide plate (8). A diversion structure (7) is provided at the discharge port (15) at the bottom of the primary guide plate (8) via a fixed bracket (16).

6. The sulfur refining device for natural gas desulfurization and purification according to claim 5, characterized in that: The diversion structure (7) comprises a flow limiting angle (7-1) and a flow blocking angle (7-2) arranged in upper and lower layers. The top surface of the flow limiting angle (7-1) is an umbrella-shaped surface, which is used to abut and block the blanking opening (15) of the first-level guide plate (8). The bottom surface of the flow limiting angle (7-1) is fixed with a plurality of vertically arranged positioning columns (16-1).

7. The sulfur refining device for natural gas desulfurization and purification according to claim 6, characterized in that: The fixed bracket (16) comprises a vertically arranged connecting arm, one end of which is fixedly arranged on the bottom surface of the first-level guide plate (8); the other end of the connecting arm is fixedly connected to the flow blocking angle (7-2), the upper end surface of the flow blocking angle (7-2) is vertically provided with a positioning groove (16-3) that cooperates with the positioning column (16-1), a spring (16-2) is pressed in the positioning groove (16-3), and the other end of the spring (16-2) is fixedly sleeved on the positioning column (16-1).

8. The sulfur refining device for natural gas desulfurization and purification according to claim 1, characterized in that: The sulfur melting zone (C) is located below the secondary guide plate (9) and is connected to the dehydration zone (B). Multiple layers of heating pipes filled with heat-conducting oil are arranged in the sulfur melting zone (C).

9. The sulfur refining device for natural gas desulfurization and purification according to claim 1, characterized in that: The outer wall of the sedimentation zone (D) is provided with multiple layers of heating pipes filled with heat-conducting oil, and a filter is provided at the bottom end of the sedimentation zone (D).

10. The sulfur refining device for natural gas after desulfurization and purification according to any one of claims 1 to 9, characterized in that: The adjacent ends of the outer side walls of the separation zone (A), dehydration zone (B), sulfur melting zone (C) and sedimentation zone (D) are connected by flanges.

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