High efficiency liquid sulfur trap

Abstract

The utility model relates to petroleum chemical equipment technical field especially, relates to a kind of high-efficiency liquid sulfur trap, the high-efficiency liquid sulfur trap provided by the utility model includes tank body, heat transfer assembly and gas pressure detection assembly, tank body has cavity and with the gas inlet, gas outlet and liquid sulfur export of cavity communication;Heat transfer assembly is set in cavity, and located in the gas passage between gas inlet and gas outlet, heat transfer assembly has the gas passage and medium passage of mutual heat exchange, gas passage is passed through by process gas, and medium passage is connected with external heat exchange medium;Gas pressure detection assembly is set on tank body, for detecting the gas pressure difference between gas passage input end and output end;Wherein, the temperature of heat exchange medium is adjustable, the high-efficiency liquid sulfur trap provided by the utility model can effectively avoid the problem of sulfur blockage, and then improve gas-liquid separation effect, guarantee the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical equipment technology, and in particular to a high-efficiency liquid sulfur trap. Background Technology

[0002] The liquid sulfur trap is a crucial piece of equipment in a sulfur recovery unit, located at the boundary between the sulfur production section and the tail gas section. Its function is to further recover liquid sulfur from the process gas exiting the final condenser, playing a vital role in improving sulfur recovery rates, reducing tail gas treatment load, and preventing air pollution.

[0003] Currently, most sulfur recovery units use metal wire mesh liquid sulfur traps. This trap has a relatively simple structure, is a vertical container, with process gas entering from the bottom and exiting from the top. Inside the trap, there are metal wire mesh trapping elements for capturing liquid sulfur, and outside the trap, there are steam heating coils and jackets to prevent liquid sulfur from solidifying due to excessively low temperatures.

[0004] Existing metal wire mesh liquid sulfur traps have poor gas-liquid separation efficiency, and the metal wire mesh is easily blocked by sulfur, resulting in a large amount of liquid sulfur entrained in the exhaust gas. This increases the load on the exhaust gas system, increases the pressure drop, and may even cause sulfur to block the exhaust gas system, shortening the operating cycle and service life of the device. Utility Model Content

[0005] This invention provides a high-efficiency liquid sulfur trap, which can effectively avoid the problem of sulfur blockage, thereby improving the gas-liquid separation effect, reducing the load on the exhaust gas system, and ensuring the service life of the device.

[0006] This utility model provides a high-efficiency liquid sulfur trap, comprising: a tank having a cavity and an inlet, an outlet, and a liquid sulfur outlet communicating with the cavity; a heat transfer component disposed within the cavity and located in a gas passage between the inlet and the outlet, the heat transfer component having a gas channel and a medium channel capable of exchanging heat with each other, the gas channel being for process gas to pass through, and the medium channel being connected to an external heat exchange medium; and a pressure detection component disposed on the tank for detecting the pressure difference between the input and output ends of the gas channel; wherein, the temperature of the heat exchange medium is adjustable, when the pressure difference between the input and output ends of the gas channel is less than a preset value, the temperature of the heat exchange medium is lower than the melting point of sulfur, so that the liquid sulfur entrained in the process gas condenses on the surface of the heat transfer component; when the pressure difference between the input and output ends of the gas channel is greater than or equal to the preset value, the temperature of the heat exchange medium is higher than the melting point of sulfur, so that the sulfur condensed on the surface of the heat transfer component melts.

[0007] In one possible implementation, the air pressure detection component includes: a first pressure sensor disposed at the input end of the gas channel; and a second pressure sensor disposed at the output end of the gas channel.

[0008] In one possible implementation, the heat transfer assembly includes multiple heat transfer plates, with a medium channel formed inside the heat transfer plates and a gas channel formed between two adjacent heat transfer plates.

[0009] In one possible implementation, the heat transfer plate includes two metal plates, with a medium channel formed between the two metal plates. The metal plates are integrally formed with a uniform thickness. The side of the metal plates facing the medium channel has a first protrusion arranged in a matrix, and a first recess is formed on the side away from the medium channel. The two metal plates are connected to each other through their respective first protrusions.

[0010] In one possible implementation, a flow-deflecting weld bead is provided on the side of the metal plate facing the medium channel. The flow-deflecting weld bead is arranged vertically or horizontally according to a preset center distance to guide the flow of the heat exchange medium.

[0011] In one possible implementation, a second protrusion is provided on the side of the metal plate away from the medium channel, and a second recess is formed on the side facing the medium channel, with the first protrusion and the second protrusion being offset from each other.

[0012] In one possible implementation, a demister is also included, located between the heat transfer assembly and the outlet.

[0013] In one possible implementation, a first heat tracing coil is also included, which is attached to the bottom of the demister for heating the demister.

[0014] In one possible implementation, a second heat tracing coil is provided on the outer circumferential surface of the tank; and / or, a heat tracing jacket is provided outside the liquid sulfur outlet.

[0015] In one possible implementation, an air distribution pipe is also included, which is disposed in the cavity and connected to the air inlet for uniformly distributing air to the heat transfer components.

[0016] Secondly, this utility model provides a liquid sulfur capture method using the above-mentioned high-efficiency liquid sulfur trap, comprising the following steps: sulfur-containing process gas enters the tank and flows upward; when the sulfur-containing process gas flows through the gas channel of the heat transfer component, it exchanges heat with the heat exchange medium in the medium channel; when the gas pressure difference between the input end and the output end of the gas channel is less than a preset value, the temperature of the heat exchange medium is controlled to be lower than the melting point of sulfur, so that the liquid sulfur entrained in the process gas condenses on the surface of the heat transfer component; when the gas pressure difference between the input end and the output end of the gas channel is greater than or equal to the preset value, the temperature of the heat exchange medium is controlled to be higher than the melting point of sulfur, so that the sulfur condensed on the surface of the heat transfer component melts; the liquid sulfur entrained in the process gas is subjected to a condensation-melting cycle operation by controlling the temperature of the heat exchange medium; the captured process gas is discharged from the gas outlet, and the captured liquid sulfur is discharged from the liquid sulfur outlet.

[0017] This utility model provides a high-efficiency liquid sulfur trap. By establishing a real-time monitoring system based on a pressure detection component and an intelligent control system with adjustable heat exchange medium temperature, it achieves accurate judgment of the operating status of the liquid sulfur trap and automatic adjustment of operating parameters. This effectively solves the technical problems of poor gas-liquid separation efficiency and short operating cycle caused by sulfur blockage in existing metal wire mesh liquid sulfur traps. Specifically, the pressure detection component can accurately reflect the degree of blockage of the heat transfer component by monitoring the pressure difference between the input and output ends of the gas channel in real time. When the pressure difference is less than the preset value, it indicates that the heat transfer component is unobstructed. At this time, the temperature of the heat exchange medium is controlled below the melting point of sulfur to promote the full condensation of liquid sulfur in the process gas and maximize the liquid sulfur capture. When the pressure difference is greater than or equal to the preset value, it indicates that the heat transfer component has begun to blockage. At this time, the temperature of the heat exchange medium is automatically increased to above the melting point of sulfur, so that the condensed sulfur melts and flows down, clearing the blockage in time and restoring the normal operating state of the equipment. This condensation-melting cycle control mechanism based on real-time differential pressure feedback, compared to the passive cleaning mode of existing technologies, can take immediate action when the equipment shows signs of clogging. This avoids severe blockage and ensures efficient capture of liquid sulfur, enabling continuous and stable operation without frequent shutdowns for manual cleaning. Simultaneously, the multi-heat plate structure of the heat transfer components provides extremely high heat exchange efficiency and a uniformly distributed temperature field. Combined with real-time monitoring of gas pressure and intelligent control of medium temperature, compared to traditional wire mesh, the liquid sulfur capture efficiency is increased from approximately 95% to over 99%. This significantly reduces the amount of liquid sulfur entrained in the exhaust gas, lowers the load and pressure drop of the exhaust gas system, fundamentally eliminates the risk of sulfur clogging the exhaust gas system, extends the unit's operating cycle, improves sulfur recovery rate and production efficiency, and greatly enhances the automation level of equipment operation, reducing manual intervention and maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a high-efficiency liquid sulfur trap provided by this utility model.

[0020] Figure 2 This is a top view of a flat plate heat transfer component provided by this utility model.

[0021] Figure 3 This is a top view of a cylindrical heat transfer component provided by this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of a metal plate with a vertical medium channel provided by this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of a metal plate with a horizontal medium channel provided by this utility model.

[0024] Figure 6 This is a partially enlarged structural diagram of a multi-heat transfer plate provided by this utility model.

[0025] Figure label: 1. Tank body; 11. Cavity; 12. Air inlet; 13. Air outlet; 14. Liquid sulfur outlet; 15. Support legs; 2. Heat transfer assembly; 21. Gas channel; 22. Medium channel; 23. Heat transfer plate; 231. Metal plate; 2311. First protrusion; 2312. First recess; 2313. Baffle weld bead; 2314. Second protrusion; 2315. Second recess; 3. First pressure sensor; 4. Second pressure sensor; 5. Demister; 6. First heat tracing coil; 7. Second heat tracing coil; 8. Heat tracing jacket; 9. Air distribution pipe. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] The following is combined Figure 1-6 This utility model provides a high-efficiency liquid sulfur trap, comprising: a tank 1, a heat transfer assembly 2, and a pressure detection assembly, wherein: The tank 1 has a cavity 11 and an air inlet 12, an air outlet 13, and a liquid sulfur outlet 14 communicating with the cavity 11. Specifically, the tank 1 adopts a vertical structure, with the liquid outlet located at the bottom of the tank 1. The liquid sulfur outlet 14 is a four-way structure used for periodic sludge removal and cleaning of the trap. The air inlet 12 is located at the bottom of the side wall of the tank 1, and the air outlet 13 is located at the top of the tank 1. The bottom of the tank 1 is provided with support legs 15, allowing the liquid sulfur outlet 14 to smoothly discharge sulfur.

[0028] The heat transfer component 2 is disposed in the cavity 11 and located in the gas passage between the air inlet 12 and the air outlet 13. The heat transfer component 2 has a gas passage 21 and a medium passage 22 that can exchange heat with each other. The gas passage 21 is for process gas to pass through, and the medium passage 22 is connected to the external heat exchange medium.

[0029] A pressure detection component is installed on the tank 1 to detect the pressure difference between the input and output ends of the gas channel 21.

[0030] The temperature of the heat exchange medium is adjustable. When the pressure difference between the input and output ends of the gas channel 21 is less than a preset value, the temperature of the heat exchange medium is lower than the melting point of sulfur, so that the liquid sulfur carried by the process gas condenses on the surface of the heat transfer component 2. When the pressure difference between the input and output ends of the gas channel 21 is greater than or equal to the preset value, the temperature of the heat exchange medium is higher than the melting point of sulfur, so that the sulfur condensed on the surface of the heat transfer component 2 melts.

[0031] This invention establishes a real-time monitoring system based on a pressure detection component and an intelligent control system with adjustable heat exchange medium temperature. This system accurately judges the operating status of the liquid sulfur trap and automatically adjusts its operating parameters, effectively solving the technical problems of poor gas-liquid separation efficiency and short operating cycle caused by sulfur blockage in existing metal wire mesh liquid sulfur traps. Specifically, the pressure detection component monitors the pressure difference between the input and output ends of the gas channel in real time, accurately reflecting the degree of blockage in the heat transfer component. When the pressure difference is less than a preset value, it indicates that the heat transfer component is unobstructed. At this time, the temperature of the heat exchange medium is controlled below the melting point of sulfur to promote the full condensation of liquid sulfur in the process gas and maximize the liquid sulfur capture. When the pressure difference is greater than or equal to the preset value, it indicates that the heat transfer component is starting to blockage. At this time, the temperature of the heat exchange medium is automatically increased to above the melting point of sulfur, causing the condensed sulfur to melt and flow down, promptly clearing the blockage and restoring the equipment to normal operating status. This condensation-melting cycle control mechanism based on real-time differential pressure feedback, compared to the passive cleaning mode of existing technologies, can take immediate action when the equipment shows signs of clogging. This avoids severe blockage and ensures efficient capture of liquid sulfur, enabling continuous and stable operation without frequent shutdowns for manual cleaning. Simultaneously, the multi-heat plate structure of the heat transfer components provides extremely high heat exchange efficiency and a uniformly distributed temperature field. Combined with real-time monitoring of gas pressure and intelligent control of medium temperature, compared to traditional wire mesh, the liquid sulfur capture efficiency is increased from approximately 95% to over 99%. This significantly reduces the amount of liquid sulfur entrained in the exhaust gas, lowers the load and pressure drop of the exhaust gas system, fundamentally eliminates the risk of sulfur clogging the exhaust gas system, extends the unit's operating cycle, improves sulfur recovery rate and production efficiency, and greatly enhances the automation level of equipment operation, reducing manual intervention and maintenance costs.

[0032] Specifically, tank 1 provides a flow space for sulfur-containing process gases. Its inlet 12, outlet 13, and liquid sulfur outlet 14 respectively enable the entry of process gases, the discharge of treated gases, and the collection and discharge of liquid sulfur. The heat transfer assembly 2, as the core heat exchange component, has a gas channel 21 through which process gases pass, and a medium channel 22 connecting to an external heat exchange medium. The two exchange heat indirectly through the wall of the heat transfer assembly 2. The pressure detection assembly monitors the pressure difference across the heat transfer assembly 2 in real time, providing feedback signals to the control system to ensure that the equipment can automatically adjust operating parameters according to the actual operating conditions. The adjustability of the heat exchange medium temperature is key to achieving intelligent control. By precisely controlling the heat exchange medium temperature, the controlled condensation and melting of liquid sulfur entrained in the process gases on the surface of the heat transfer assembly 2 can be achieved.

[0033] In a specific embodiment, when the process gas temperature after the final stage condenser in a sulfur recovery device is 150°C and the sulfur content is 2%, traditional high-efficiency liquid sulfur traps often experience a decrease in separation efficiency due to sulfur condensation and blockage after long-term operation. This leads to an increase in the amount of liquid sulfur entrained in the outlet gas, resulting in increased load and pressure drop in the tail gas system. Since the sulfur recovery device operates continuously, the trap cannot be frequently stopped / started in a short period of time. However, with the high-efficiency liquid sulfur trap of this invention, when the pressure detection component detects that the pressure difference before and after the heat transfer component 2 has increased from the initial 100Pa to the preset value of 500Pa, it automatically raises the temperature of the heat exchange medium from 90°C to 140°C (higher than the melting point of sulfur 119°C), causing the condensed sulfur to melt and flow down. The pressure difference then drops to below 150Pa. Then, the temperature of the heat exchange medium is lowered back to 90°C to continue trapping. This cyclical operation can extend the operating cycle of the equipment, reduce tail gas system fluctuations, reduce the frequency of manual intervention, and achieve a liquid sulfur trapping rate of over 99%.

[0034] In related technologies, traditional high-efficiency liquid sulfur traps typically use metal wire mesh to capture sulfur-containing process gas. The working principle of the wire mesh demister is to gather and separate the mist in the gas into liquid droplets through mechanisms such as inertial impaction, gravity settling, surface tension, and capillary action. When liquid sulfur in the process gas condenses on the metal wire mesh, due to the lack of effective monitoring and control methods, operators often have to manually clean it periodically based on experience. This not only affects the continuity of production but also results in incomplete cleaning or excessive cleaning. Although some technologies use heating methods for the metal wire mesh, the lack of real-time monitoring of the actual blockage status of the equipment and the existence of uneven heating often lead to problems with improper heating timing. Either heating too early results in a decrease in liquid sulfur collection rate, or heating too late results in severe blockage.

[0035] In this embodiment of the invention, the degree of blockage of the heat transfer component 2 is monitored in real time by a pressure detection component, and the pressure difference value is used as the control basis to achieve precise control of the heat exchange medium temperature. Compared with the traditional method of timed cleaning or heating of metal wire mesh, this invention can dynamically adjust according to the actual operating status of the equipment, ensuring a high liquid sulfur capture rate while avoiding equipment damage caused by excessive blockage. Through intelligent condensation-melting cycle control, the automation level of equipment operation is significantly improved, reducing the frequency of manual intervention and improving production efficiency and safety. At the same time, since the forced shutdown for cleaning in traditional methods is avoided, the stability and continuity of the device operation are significantly improved.

[0036] In some embodiments, the air pressure detection component includes: a first pressure sensor 3 disposed at the input end of the gas channel 21; and a second pressure sensor 4 disposed at the output end of the gas channel 21.

[0037] In this invention, by setting a first pressure sensor 3 and a second pressure sensor 4 at the input and output ends of the gas channel 21 of the heat transfer component 2 respectively, accurate monitoring of the working status of the heat transfer component 2 is achieved, providing reliable feedback signals for the automatic control system. The two pressure sensors measure the pressure values ​​before and after the heat transfer component 2, and by calculating the pressure difference, the change in resistance inside the heat transfer component 2 can be accurately reflected. When the amount of sulfur condensed on the surface of the heat transfer component 2 increases, the gas flow resistance increases, and the pressure difference increases accordingly, thus providing timely and accurate status information for the control system.

[0038] Specifically, the first pressure sensor 3 is located at the input end of the gas channel 21 to measure the pressure of the process gas before it enters the heat transfer component 2; the second pressure sensor 4 is located at the output end of the gas channel 21 to measure the pressure of the process gas after it passes through the heat transfer component 2. The difference between the pressure measurements of the two sensors is the pressure drop of the heat transfer component 2, which directly reflects the magnitude of the internal flow resistance of the heat transfer component 2. When sulfur begins to condense on the surface of the heat transfer component 2, the effective flow cross-sectional area decreases, the gas flow resistance increases, and the pressure drop increases accordingly. By monitoring this pressure drop change in real time, the control system can accurately determine the degree of blockage in the heat transfer component 2, thereby deciding whether to adjust the temperature of the heat exchange medium.

[0039] In this embodiment of the invention, two independent pressure sensors are used to measure the pressure before and after the heat transfer component 2, which not only obtains accurate differential pressure values ​​but also enables continuous monitoring. Compared with the traditional single-point measurement method, dual-point pressure measurement can eliminate the influence of system pressure fluctuations on the measurement results, improving measurement accuracy and reliability. Simultaneously, the independent setting of the two pressure sensors provides redundancy protection; when one sensor fails, the system can still continue to operate, improving system reliability and safety. Through precise differential pressure monitoring, the control system can achieve more refined control, avoiding both equipment blockage caused by untimely control and a decrease in liquid sulfur capture rate due to over-control.

[0040] In some embodiments, the heat transfer assembly 2 includes a plurality of heat transfer plates 23, with a medium channel 22 formed inside the heat transfer plate 23 and a gas channel 21 formed between two adjacent heat transfer plates 23.

[0041] Specifically, the heat transfer plate 23 can be a flat plate or a cylindrical structure of different diameters.

[0042] In this invention, by designing the heat transfer component 2 as a structure comprising multiple heat transfer plates 23, wherein a medium channel 22 is formed inside the heat transfer plate 23 and a gas channel 21 is formed between adjacent heat transfer plates 23, highly efficient heat exchange between the gas and the heat exchange medium is achieved, significantly improving the capture efficiency of liquid sulfur. The combined structure of multiple heat transfer plates 23 greatly increases the contact area between the gas and the heat exchange surface. At the same time, the medium channel 22 inside the heat transfer plate 23 and the gas channel 21 between the plates form a compact heat exchange system, significantly improving the heat exchange efficiency. This structural design allows the process gas to come into contact with more heat exchange surfaces when passing through the heat transfer component 2, thereby achieving more complete heat exchange.

[0043] Specifically, the medium channel 22 inside each heat transfer plate 23 allows the heat exchange medium to flow, realizing the input or output of heat; the gas channel 21 between two adjacent heat transfer plates 23 allows the process gas to flow through, and the process gas exchanges heat with the surface of the heat transfer plate 23. The parallel arrangement of multiple heat transfer plates 23 increases the contact area of ​​the gas in the heat transfer assembly 2, making the heat exchange more complete. At the same time, the special flow channels inside the heat transfer plates 23 provide a longer residence time and higher turbulence for the heat exchange medium. When the process gas passes through the heat transfer plates 23, the temperature field distribution is uniform, the temperature of the heat exchange medium tends to be uniform, avoiding local overheating or undercooling, reducing thermal resistance, improving heat exchange efficiency, and reducing operating energy consumption. The alternating arrangement of the medium channel 22 and the gas channel 21 makes the entire heat transfer assembly 2 form a compact and efficient heat exchanger structure.

[0044] In this embodiment of the invention, the combined structure of multiple heat transfer plates 23 provides a larger heat exchange area within the same equipment volume, significantly improving heat exchange efficiency. Compared to the traditional single heat exchanger structure, the multi-heat transfer plate 23 structure not only has a larger heat exchange area but also a more compact structure and smaller footprint. Furthermore, the modular design of the heat transfer plates 23 facilitates adjustment of the number of heat transfer plates 23 according to actual process requirements, achieving a unified standardization and customization of the equipment. Through parallel heat exchange of multiple heat transfer plates 23, the process gas can be cooled more thoroughly, significantly improving the liquid sulfur capture rate. Simultaneously, due to the improved heat exchange efficiency, the consumption of heat exchange medium is correspondingly reduced, lowering operating costs.

[0045] like Figure 6 As shown, in some embodiments, the heat transfer plate 23 includes two metal plates 231, with a medium channel 22 formed between the two metal plates 231. The metal plates 231 are integrally formed structures of equal thickness. The metal plates 231 have first protrusions 2311 arranged in a matrix on the side facing the medium channel 22, and correspondingly, first recesses 2312 are formed on the side away from the medium channel 22. The two metal plates 231 are connected to each other through their respective first protrusions 2311.

[0046] In this invention, the heat transfer plate 23 is designed as an integrated structure comprising two metal plates 231. The metal plates 231 have first protrusions 2311 arranged in a matrix on the side facing the medium channel 22, and correspondingly, first recesses 2312 are formed on the side away from the medium channel 22. The two metal plates 231 are connected to each other through their respective first protrusions 2311, achieving high-strength connection and efficient heat transfer of the heat transfer plate 23. The integrated structure ensures the overall strength and manufacturing consistency of the heat transfer plate 23. The matrix arrangement of the first protrusions 2311 not only ensures a reliable connection between the two metal plates 231 but also enhances the structural strength of the heat transfer plate 23. Simultaneously, the protrusions, acting as flow-turbing elements, can disrupt the laminar boundary layer of the medium, significantly enhancing the heat exchange effect.

[0047] Specifically, the two metal plates 231 are manufactured using an integral molding process, ensuring uniform plate thickness and consistent material properties. The first protrusions 2311 are arranged in a matrix, providing multi-point support and connection for the two metal plates 231, enabling the heat transfer plate 23 to withstand high pressure without deformation. The presence of the first protrusions 2311 divides the medium channel 22 into multiple interconnected small channels, causing disturbance in the heat transfer medium during flow, increasing turbulence, disrupting the laminar boundary layer, and enhancing convective heat transfer. Simultaneously, the formation of the first recess 2312 increases the heat transfer area on the gas side, providing more heat exchange contact surface for the process gas and further improving heat transfer efficiency. The contact connection of the two metal plates 231 through the first protrusions 2311 forms a stable medium channel 22, ensuring both sealing and structural strength.

[0048] In related technologies, heat transfer plates 23 are usually made of multi-layer welded materials or simple flat plate structures, which have problems such as insufficient connection strength and low heat exchange efficiency. Multi-layer welded structures are prone to stress concentration at the weld seams, which may lead to cracking and leakage after long-term use; although simple flat plate structures are easy to manufacture, they have poor structural strength, low pressure resistance, and low heat exchange efficiency, which cannot meet the requirements of high-efficiency heat exchange.

[0049] In this embodiment of the invention, the integrated structure avoids the quality problems that may arise from multi-layer welding, resulting in uniform material properties and a longer service life. The matrix arrangement of the first protrusions 2311 provides distributed support for the heat transfer plate 23, offering higher structural strength and better fatigue resistance compared to traditional welded connections. Simultaneously, the first protrusions 2311 also enhance heat transfer by generating turbulence, improving heat exchange efficiency—something traditional flat plate structures cannot achieve. By optimizing the height, spacing, and arrangement of the first protrusions 2311, optimal heat exchange performance can be obtained while ensuring structural strength, achieving a perfect balance between structural strength and heat exchange performance.

[0050] like Figure 4 , 5 As shown, in some embodiments, a flow-deflecting weld bead 2313 is provided on the side of the metal plate 231 facing the medium channel 22. The flow-deflecting weld bead 2313 is arranged vertically or horizontally according to a preset center distance to guide the flow of the heat exchange medium.

[0051] In this invention, by providing flow-deflecting weld beads 2313 on the side of the metal plate 231 facing the medium channel 22, and arranging these flow-deflecting weld beads 2313 vertically or horizontally according to a preset center distance, effective guidance of the heat exchange medium flow is achieved, avoiding medium short-circuiting and ensuring that the heat exchange medium can fully utilize the heat exchange area of ​​the heat transfer plate 23, significantly improving heat exchange uniformity and efficiency. The arrangement of the flow-deflecting weld beads 2313 creates a regular flow path for the heat exchange medium within the heat transfer plate 23, increasing the residence time of the medium within the heat transfer plate 23. Simultaneously, by changing the flow direction and generating disturbance, the heat exchange effect is further enhanced.

[0052] Specifically, the baffle weld beads 2313 are formed through a welding process, dividing the medium channel 22 into multiple interconnected flow regions. The vertically arranged baffle weld beads 2313 cause the heat exchange medium to flow in a tortuous manner in the horizontal direction, increasing the flow path length; the horizontally arranged baffle weld beads 2313 cause the heat exchange medium to flow in layers in the vertical direction, ensuring the uniformity of medium distribution. The preset center distance ensures sufficient flow space between the baffle weld beads 2313, avoiding excessive flow resistance while achieving effective flow guidance. The presence of the baffle weld beads 2313 prevents the heat exchange medium from flowing directly from the inlet to the outlet; it must flow along the designed path, thus fully utilizing the heat exchange area of ​​the entire heat transfer plate 23.

[0053] In this embodiment of the invention, the baffle weld bead 2313 effectively solves the problem of uneven medium distribution. By rationally designing the position and direction of the baffle weld bead 2313, the heat exchange medium can form a uniform flow distribution throughout the entire heat transfer plate 23, avoiding short circuits and dead zones. Compared with the traditional flat plate structure, the baffle weld bead 2313 not only improves heat exchange efficiency but also reduces the requirement for heat exchange medium flow rate. Under the same heat exchange effect, it can reduce the medium circulation volume and reduce the system's operating energy consumption. At the same time, the baffle weld bead 2313 also enhances the structural strength of the heat transfer plate 23, improving the service life and reliability of the equipment.

[0054] like Figure 6 As shown, in some embodiments, a second protrusion 2314 is provided on the side of the metal plate 231 away from the medium channel 22, and a second recess 2315 is formed on the side facing the medium channel 22, with the first protrusion 2311 and the second protrusion 2314 being offset from each other.

[0055] In this invention, by providing a second protrusion 2314 on the side of the metal plate 231 away from the medium channel 22, and correspondingly forming a second recess 2315 on the side facing the medium channel 22, and staggering the first protrusion 2311 and the second protrusion 2314, a significant increase in the heat transfer area on the gas side and a further enhancement of the heat transfer effect are achieved. The provision of the second protrusion 2314 not only increases the heat transfer area on the gas side, but also acts as a turbulence element to disrupt the laminar boundary layer of the gas, thereby enhancing convective heat transfer on the gas side. The staggered arrangement of the first protrusion 2311 and the second protrusion 2314 forms a complex heat transfer surface, enabling the metal plate 231 to have enhanced heat transfer functions on both the medium side and the gas side.

[0056] Specifically, the second protrusion 2314 is located on the side of the metal plate 231 away from the medium channel 22, that is, the side facing the gas channel 21. Its formation makes this side surface no longer flat but a three-dimensional undulating heat transfer surface. The second recess 2315 is located on the side of the metal plate 231 facing the medium channel 22, corresponding to the second protrusion 2314, increasing the heat transfer area on the medium side. The staggered arrangement of the first protrusion 2311 and the second protrusion 2314 means that they do not coincide in planar position. This arrangement makes the metal plate 231 form a complex wave-shaped structure, maximizing the heat transfer area while ensuring structural strength. When the process gas flows through the gas channel 21, the disturbance generated by the second protrusion 2314 increases the turbulence of the gas, destroys the laminar boundary layer, and significantly enhances the convective heat transfer effect.

[0057] In this embodiment of the invention, the specially designed second protrusion 2314 specifically addresses the problem of low heat exchange efficiency on the gas side. By staggering the first protrusion 2311 and the second protrusion 2314, the heat transfer plate 23 achieves enhanced heat transfer on both the medium and gas sides, realizing a double-sided enhanced heat transfer effect. Compared to traditional single-sided enhanced or unenhanced structures, this design makes the entire heat transfer process more balanced, preventing one side from becoming a heat transfer bottleneck. Simultaneously, the staggered protrusion structure also has a self-cleaning function; the resulting disturbance increases the turbulence of the fluids on both sides, helping to prevent the accumulation of dirt on the heat transfer surface, maintaining the cleanliness of the heat transfer surface, and extending the equipment's operating cycle.

[0058] In some embodiments, a demister 5 is also included, which is located between the heat transfer assembly 2 and the air outlet 13.

[0059] In this invention, a demister 5 is installed between the heat transfer component 2 and the outlet 13, enabling secondary capture of the process gas after treatment by the heat transfer component 2. This effectively removes residual liquid sulfur droplets from the gas, further improving the overall liquid sulfur capture efficiency. The demister 5 solves the problem that the heat transfer component 2 cannot completely capture fine liquid sulfur droplets. It has a particularly good separation effect on liquid sulfur particles with small particle size that are easily carried by the airflow, ensuring the cleanliness of the discharged gas and reducing the loss of liquid sulfur.

[0060] Specifically, the demister 5 is located above the heat transfer assembly 2. After the process gas passes through the cooling and liquid sulfur condensation process of the heat transfer assembly 2, it may still carry a certain amount of liquid sulfur droplets. These droplets, due to their small size and relatively low gravity, are easily carried by the airflow and difficult to completely separate within the heat transfer assembly 2. The demister 5, through its special structural design, such as wire mesh, corrugated plates, or other separation elements, provides opportunities for the liquid sulfur droplets to collide, coalesce, and settle. When the process gas containing liquid sulfur droplets passes through the demister 5, the droplets collide with the internal structure of the demister 5, small droplets coalesce into larger droplets, and then settle and separate under gravity, achieving the purpose of gas-liquid separation.

[0061] In related technologies, liquid sulfur capture equipment typically relies solely on a single metal wire mesh for liquid sulfur separation, lacking effective means to separate the fine liquid sulfur droplets remaining in the gas after separation. These fine droplets not only waste sulfur resources but may also corrode and pollute downstream equipment, while simultaneously affecting the environmental performance of emitted gases. Although some devices incorporate multi-stage metal wire mesh collectors, the improvement in separation efficiency is often limited, failing to effectively remove the fine droplets.

[0062] In this embodiment of the invention, the demister 5 is specifically designed to address the separation problem of fine liquid sulfur droplets. As a professional gas-liquid separation device, the demister 5 possesses high separation efficiency and low pressure drop, achieving efficient separation without significantly increasing system resistance. Compared to the traditional single metal wire mesh separation method, the combined use of the heat transfer component 2 and the demister 5 achieves a combination of coarse and fine separation, greatly improving the overall separation efficiency. Simultaneously, the demister 5 also protects downstream equipment, preventing corrosion and blockage of pipes, valves, and other equipment by liquid sulfur droplets, thus extending the service life of the entire system.

[0063] In some embodiments, a first heating coil 6 is also included, which is attached to the bottom of the demister 5 for heating the demister 5.

[0064] In this invention, by installing a first heating coil 6 that is attached to the bottom of the demister 5, effective heating of the demister 5 is achieved, preventing the collected liquid sulfur from solidifying and clogging the surface of the demister 5. This ensures the normal operation of the demister 5, extends the equipment's operating cycle, and reduces maintenance frequency. The first heating coil 6 provides the necessary heat to the demister 5, maintaining the temperature of the entire demister 5 above the melting point of sulfur, ensuring that the separated liquid sulfur can flow down in a timely manner without accumulating and solidifying inside the demister 5.

[0065] Specifically, the first heating coil 6 is fitted into the bottom of the demister 5, providing heat to the demister 5 through heat conduction. During the separation of liquid sulfur droplets, a large amount of liquid sulfur accumulates on the surface of the demister 5's internal structure. If the temperature is too low, this liquid sulfur will solidify and adhere to the surface of the demister 5, gradually clogging the flow channels and affecting the separation effect, or even causing the equipment to malfunction. The first heating coil 6 provides a stable heat source to the bottom of the demister 5 through a circulating heat medium (such as steam). The heat is transferred to all parts of the demister 5 through conduction, maintaining the entire demister 5 at an appropriate temperature. The fitted arrangement ensures efficient heat transfer while avoiding excessive heat loss.

[0066] In this embodiment of the invention, the close fit between the first heating coil 6 and the bottom of the demister 5 achieves highly efficient heat transfer, increasing the heat transfer efficiency by more than 40% compared to traditional indirect heating methods. By heating from the bottom and utilizing the upward transfer of heat, the entire demister 5 can maintain a suitable temperature, avoiding localized overheating or underheating. Simultaneously, the coil-type heating structure offers better applicability and reliability compared to other heating methods, and facilitates temperature control and maintenance. Precise temperature control ensures the normal operation of the demister 5 while avoiding energy waste caused by overheating, achieving a balance between economy and reliability.

[0067] In some embodiments, a second heat tracing coil 7 is provided on the outer peripheral surface of the tank body 1; and / or, a heat tracing jacket 8 is provided outside the liquid sulfur outlet 14.

[0068] In this invention, by installing a second heating coil 7 on the outer circumference of the tank 1 and / or installing a heating jacket 8 outside the liquid sulfur outlet 14, comprehensive heat preservation and heating of the entire liquid sulfur trap is achieved. This prevents liquid sulfur from solidifying and clogging the inner wall of the tank 1 and the outlet, ensuring smooth discharge of liquid sulfur and improving the reliability of equipment operation. The second heating coil 7 maintains the overall temperature of the tank 1, preventing liquid sulfur from solidifying inside the tank 1 due to excessively low temperatures; the heating jacket 8 is specifically designed to insulate the liquid sulfur outlet 14, preventing solidification and blockage of liquid sulfur during discharge.

[0069] Specifically, the second heating coil 7 is arranged spirally or parallel along the outer circumference of the tank 1, providing heating to the entire tank 1 through a circulating heat medium. As the main container of the liquid sulfur trap, the inner wall temperature of the tank 1 directly affects the fluidity of the liquid sulfur. If the temperature is too low, the captured liquid sulfur may re-solidify during its flow to the outlet, forming solid sulfur blocks, which not only affects the normal discharge of liquid sulfur but may also damage the internal structure of the tank 1. The heating jacket 8 is installed outside the liquid sulfur outlet 14, providing insulation for the final stage of liquid sulfur discharge, ensuring that the liquid sulfur remains fluid as it leaves the equipment. The combined use of these two heating measures achieves full-process insulation from the inside of the tank 1 to the liquid sulfur outlet 14, ensuring that the liquid sulfur remains under suitable temperature conditions throughout the entire process from capture to discharge.

[0070] In some embodiments, an air distribution pipe 9 is also included. The air distribution pipe 9 is disposed in the cavity 11 and communicates with the air inlet 12 for uniformly distributing air to the heat transfer component 2.

[0071] In this invention, by setting a gas distribution pipe 9 connected to the air inlet 12 within the cavity 11, uniform distribution of sulfur-containing process gas is achieved before it enters the heat transfer component 2. This avoids uneven heat transfer caused by gas flow deviation, ensuring that all parts of the heat transfer component 2 can function fully and improving the overall capture efficiency. The gas distribution pipe 9, through its special structural design, redistributes the process gas entering from the air inlet 12, enabling the gas to be evenly distributed to all areas of the heat transfer component 2, avoiding local overload or no-load phenomena caused by uneven gas distribution.

[0072] Specifically, the gas distribution pipe 9 is located in the lower part of the cavity 11 of the tank body 1, directly connected to the air inlet 12, to receive sulfur-containing process gas from external pipelines. The gas distribution pipe 9 is typically designed as a porous pipe or semi-pipe structure, with multiple air outlets on the pipe wall. These outlets are distributed according to a certain pattern to ensure that the gas can diffuse downwards from different positions and then flow upwards. When the process gas enters the gas distribution pipe 9, it disperses through the various outlets or flows out through the semi-pipe, forming multiple parallel or downward airflows. These airflows gradually diffuse during their ascent or descent, ultimately forming a relatively uniform flow field distribution at the inlet of the heat transfer component 2. The presence of the gas distribution pipe 9 also reduces the gas velocity, preventing high-speed airflow from directly impacting the heat transfer component 2 and reducing the adverse effects of airflow disturbance on the heat transfer effect.

[0073] In this embodiment of the invention, the specially designed gas distribution pipe 9 effectively solves the problem of uneven gas distribution. By rationally designing the semi-pipe structure and opening method of the gas distribution pipe 9, the process gas can be evenly distributed to all areas of the heat transfer component 2, achieving full utilization of the heat transfer component 2. Compared to the traditional direct gas intake method, the gas distribution pipe 9 also has a buffering effect, reducing the impact of gas flow fluctuations on the heat transfer effect and improving the stability of system operation. Simultaneously, the uniform gas distribution also helps reduce localized wear and corrosion of the heat transfer component 2, extending the service life of the equipment.

[0074] This utility model provides a liquid sulfur capture method using the above-mentioned high-efficiency liquid sulfur trap, comprising the following steps: S1. Sulfur-containing process gas enters tank 1 and flows upward; S2. When the sulfur-containing process gas flows through the gas channel 21 of the heat transfer component 2, it exchanges heat with the heat exchange medium in the medium channel 22. S3. When the pressure difference between the input and output ends of the gas channel 21 is less than the preset value, the temperature of the heat exchange medium is controlled to be lower than the melting point of sulfur so that the liquid sulfur carried by the process gas condenses on the surface of the heat transfer component 2. S4. When the pressure difference between the input and output ends of the gas channel 21 is greater than or equal to the preset value, the temperature of the heat exchange medium is controlled to be higher than the melting point of sulfur so that the sulfur condensed on the surface of the heat transfer component 2 melts. S5. The liquid sulfur entrained in the process gas is condensed and melted in a cycle by controlling the temperature of the heat exchange medium. S6. The process gas after being processed by the heat transfer component 2 is captured again by the demister 5. S7. The process gas after capture is discharged from the gas outlet, and the captured liquid sulfur is discharged from the liquid sulfur outlet 14.

[0075] This invention employs an intelligent liquid sulfur capture method based on differential pressure feedback, achieving automated control of the liquid sulfur capture process. This avoids manual judgment and operation required in traditional methods, improving operational accuracy and consistency, reducing labor intensity, and ensuring continuous and stable liquid sulfur capture results. By monitoring the real-time pressure difference before and after the heat transfer component 2, this method automatically determines the degree of blockage in the equipment and adjusts the temperature of the heat exchange medium accordingly, achieving intelligent condensation-melting cycle control. This significantly improves the automation level and reliability of the equipment operation.

[0076] Specifically, after the sulfur-containing process gas enters tank 1, it flows upward and indirectly exchanges heat with the heat exchange medium in medium channel 22 at heat transfer component 2. When the gas pressure difference is less than the preset value, it indicates that heat transfer component 2 is unobstructed. At this time, the temperature of the heat exchange medium is controlled below the melting point of sulfur to promote the condensation of liquid sulfur in the process gas and maximize the liquid sulfur capture. When the gas pressure difference is greater than or equal to the preset value, it indicates that heat transfer component 2 is starting to block. At this time, the temperature of the heat exchange medium is increased to above the melting point of sulfur, so that the condensed sulfur melts and flows down, clearing the blockage. This control strategy based on real-time differential pressure feedback can automatically adjust the operating parameters according to the actual state of the equipment, ensuring a high liquid sulfur capture rate while avoiding equipment blockage, achieving a balance between efficiency and safety.

[0077] In this embodiment of the invention, the automatic control method based on differential pressure feedback achieves truly intelligent operation. Compared to traditional manual judgment methods, this method has advantages such as rapid response, precise control, and good consistency. It can take timely measures when the equipment first shows signs of clogging, thus avoiding severe blockage and maximizing the liquid sulfur capture time. Through automated control, not only is operational efficiency improved, but the skill requirements for operators are also reduced, minimizing the possibility of human error. Furthermore, this method has excellent adaptability, allowing adjustment of preset values ​​and temperature parameters according to different process conditions, achieving optimized control of equipment operation.

[0078] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-efficiency liquid sulfur trap, characterized in that, include: The tank (1) has a cavity (11) and an air inlet (12), an air outlet (13) and a liquid sulfur outlet (14) communicating with the cavity (11). The heat transfer component (2) is disposed in the cavity (11) and located in the gas passage between the air inlet (12) and the air outlet (13). The heat transfer component (2) has a gas passage (21) and a medium passage (22) that can exchange heat with each other. The gas passage (21) is for process gas to pass through, and the medium passage (22) is connected to an external heat exchange medium. A pressure detection component is installed on the tank (1) and is used to detect the pressure difference between the input end and the output end of the gas channel (21); The temperature of the heat exchange medium is adjustable. When the pressure difference between the input and output ends of the gas channel (21) is less than a preset value, the temperature of the heat exchange medium is lower than the melting point of sulfur, so that the liquid sulfur carried by the process gas condenses on the surface of the heat transfer component (2). When the pressure difference between the input and output ends of the gas channel (21) is greater than or equal to the preset value, the temperature of the heat exchange medium is higher than the melting point of sulfur, so that the sulfur condensed on the surface of the heat transfer component (2) melts.

2. The high-efficiency liquid sulfur collector according to claim 1, characterized in that, The air pressure detection component includes: The first pressure sensor (3) is located at the input end of the gas channel (21); The second pressure sensor (4) is located at the output end of the gas channel (21).

3. The high-efficiency liquid sulfur collector according to claim 1, characterized in that, The heat transfer assembly (2) includes a plurality of heat transfer plates (23), the interior of the heat transfer plates (23) forms the medium channel (22), and the gas channel (21) is formed between two adjacent heat transfer plates (23).

4. The high-efficiency liquid sulfur collector according to claim 3, characterized in that, The heat transfer plate (23) includes two metal plates (231), and a medium channel (22) is formed between the two metal plates (231). The metal plates (231) are integrally formed structures of equal thickness. The metal plates (231) have first protrusions (2311) arranged in a matrix on the side facing the medium channel (22), and correspondingly, first recesses (2312) are formed on the side away from the medium channel (22). The two metal plates (231) are connected to each other through their respective first protrusions (2311).

5. The high-efficiency liquid sulfur collector according to claim 4, characterized in that, The metal plate (231) is provided with a flow-deflecting weld bead (2313) on the side facing the medium channel (22). The flow-deflecting weld bead (2313) is arranged vertically or horizontally according to a preset center distance to guide the flow of the heat exchange medium.

6. The high-efficiency liquid sulfur trap according to claim 4, characterized in that, The metal plate (231) has a second protrusion (2314) on the side away from the medium channel (22), and a second recess (2315) is formed on the side facing the medium channel (22). The first protrusion (2311) and the second protrusion (2314) are offset from each other.

7. The high-efficiency liquid sulfur collector according to claim 1, characterized in that, It also includes a demister (5) located between the heat transfer assembly (2) and the air outlet (13).

8. The high-efficiency liquid sulfur collector according to claim 7, characterized in that, It also includes a first heat tracing coil (6), which is attached to the bottom of the demister (5) for heating the demister (5).

9. The high-efficiency liquid sulfur trap according to any one of claims 1-8, characterized in that, The outer circumferential surface of the tank (1) is provided with a second heat tracing coil (7); And / or, the liquid sulfur outlet (14) is provided with a heat tracing jacket (8).

10. The high-efficiency liquid sulfur trap according to any one of claims 1-8, characterized in that, It also includes an air distribution pipe (9), which is disposed in the cavity (11) and connected to the air inlet (12) for uniformly distributing air to the heat transfer component (2).

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