Liquid sulfur sampling system for a sulfur recovery plant
The liquid sulfur sampling system, which uses a steam-heated jacket and inert gas purging, solves the solidification and safety issues during liquid sulfur sampling, achieving efficient and safe sampling operations and accurate analytical results.
Patent Information
- Application Number
- CN202521946650.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-10
AI Technical Summary
In sulfur recovery devices, there are problems such as excessively high temperature leading to solidification and blockage, leakage of toxic gases, and insufficient sample representativeness during liquid sulfur sampling, which affect sampling operations and safety.
A steam-heated jacket is used to prevent liquid sulfur from solidifying. Inert gas is used to replace the air inside the sampler. A circulating reflux pipeline is used to ensure the representativeness of the sample. The sampler structure is designed to facilitate operation and analysis.
It effectively prevents liquid sulfur from solidifying, ensures sample representativeness, improves analytical accuracy, and guarantees operational safety and stable equipment operation.
Smart Images
Figure CN224681866U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sulfur recovery technology, specifically relating to a liquid sulfur sampling system for a sulfur recovery device. Background Technology
[0002] During the operation of a sulfur recovery unit, regular sampling and analysis of liquid sulfur is essential to ensure product quality and maintain stable operation. However, current liquid sulfur sampling faces numerous challenges. Firstly, liquid sulfur operates at relatively high temperatures, typically between 120℃ and 160℃. If temperature control is inadequate during sampling, the liquid sulfur can easily solidify, clogging sampling pipelines and valves and severely interfering with normal sampling operations. Secondly, liquid sulfur often contains toxic and harmful gases such as hydrogen sulfide. Traditional sampling methods struggle to effectively prevent the leakage of these gases, posing a serious threat to the safety of operators and the surrounding environment. Furthermore, existing technologies cannot guarantee that the samples are sufficiently representative, potentially leading to biased liquid sulfur composition analysis results and affecting accurate assessment of the sulfur recovery unit's operating status and process optimization. Utility Model Content
[0003] This utility model addresses the shortcomings of existing technologies by providing a liquid sulfur sampling system for a sulfur recovery device. The system includes a liquid sulfur tank, a sampling pipeline, a sampler, and a circulation return pipeline. The sampling pipeline comprises interconnected sampling branch pipes and a main liquid sulfur delivery pipeline. The inlet end of the main liquid sulfur delivery pipeline is connected to a liquid sulfur pump located within the liquid sulfur tank. A sampling shut-off valve is installed on the sampling branch pipe. The sampler includes a sampler body, which is composed of a right sampler and a left sampler. The right sampler has a liquid sulfur return port with a return sampling valve. The left sampler has a sampling interface with a sampling interface sampling valve. The sampling interface is connected to the sampling branch pipe, and the liquid sulfur return port is connected to one end of the circulation return pipeline. The other end of the circulation return pipeline is connected to the liquid sulfur tank, and a sampling return shut-off valve is installed on the circulation return pipeline. Both the sampling pipeline and the circulation return pipeline are fitted with steam heating jackets; the sampler body is also equipped with a sampler thermometer.
[0004] Furthermore, the right sampler and the left sampler are connected and fixed to each other by a coupling bolt.
[0005] Furthermore, the liquid sulfur reflux port is located at the center of the top of the right sampler, and the sampling interface is located at the center of the left end face of the left sampler.
[0006] Furthermore, a sampler thermometer is provided at the center of the right end face of the sampler.
[0007] Furthermore, the sampling branch pipe is equipped with a first sampling cut-off valve and a second sampling cut-off valve.
[0008] Furthermore, the sampling reflux shut-off valve is located on the side of the circulating reflux pipeline near the liquid sulfur reflux port.
[0009] Furthermore, the sampler has several sampling chambers inside, which are interconnected by chamber connecting pipes located at the top and bottom of the sampling chambers.
[0010] Furthermore, the sampler has a viewing window on its side wall, and a sampling line is provided on the viewing window. The sampling interface is located below the sampling line.
[0011] Furthermore, the inspection window is located on the side wall of the left or right sampler.
[0012] Furthermore, the other end of the circulating return pipeline is connected to the top of the liquid sulfur tank.
[0013] This utility model has at least one of the following advantages:
[0014] 1. This utility model adopts a steam-heated jacket, which utilizes the stable heat supply of steam to efficiently and reliably prevent liquid sulfur from solidifying during the sampling process, ensuring the smooth progress of the sampling operation. Compared with other heat tracing methods, jacketed heat tracing has significant advantages in the uniformity and stability of heat transfer.
[0015] 2. Before sampling, the sampler of this utility model is pre-filled with inert gas, which replaces the air inside the sampler and avoids the influence of air on the sample.
[0016] 3. This utility model utilizes a circulating reflux pipeline to ensure that liquid sulfur circulates before sampling, thereby ensuring that the sample is sufficiently representative, improving the accuracy of liquid sulfur composition analysis results, and providing a reliable basis for the stable operation and process optimization of the sulfur recovery device. Attached Figure Description
[0017] Figure 1 The diagram shown is a schematic representation of the structure of this utility model.
[0018] Figure 2 The diagram shown is a schematic diagram of the external structure of the sampler of this utility model;
[0019] Figure 3 The diagram shown is a schematic of the internal structure of the sampler of this utility model.
[0020] In the diagram: 1. Liquid sulfur pump; 2. Liquid flow pool; 3. Circulation return path; 4. Steam tracing jacket; 5. Liquid sulfur main conveying pipe; 6. Sampling return shut-off valve; 7. First sampling shut-off valve; 8. Second sampling shut-off valve; 9. Liquid sulfur return interface; 10. Sampler; 1001. Sampling chamber; 1002. Chamber connecting pipe; 11. Sampling interface; 12. Sampling interface sampling valve; 13. Right sampler; 14. Sampler thermometer; 15. Connector bolt; 16. Left sampler; 17. Return sampling valve; 18. Sampling branch pipe; 19. Inspection window; 20. Sampling line. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.
[0022] Example 1
[0023] A liquid sulfur sampling system for a sulfur recovery device, such as Figure 1-2 As shown, the system includes a liquid sulfur tank 2, a sampling pipeline, a sampler 10, and a circulation return pipeline 3. The sampling pipeline includes a sampling branch pipe 18 and a liquid sulfur delivery main pipeline 5, which are interconnected. The inlet end of the liquid sulfur delivery main pipeline 5 is connected to a liquid sulfur pump 1 located in the liquid sulfur tank 2. A sampling shut-off valve is installed on the sampling branch pipe 18. The sampler 10 includes a sampler body, which is composed of a right sampler 13 and a left sampler 16. The right sampler 13 is provided with a liquid sulfur return port 9, and a return sampling valve 17 is installed at the liquid sulfur return port 9. The left sampler 16 is provided with a sampling interface 11, and a sampling interface sampling valve 12 is installed at the sampling interface 11. A sampler thermometer 14 is also provided on the sampler body. The sampling interface 11 is connected to the sampling branch pipe 18, and the liquid sulfur return port 9 is connected to one end of the circulation return pipeline 3. The other end of the circulation return pipeline 3 is connected to the liquid sulfur tank 2, and a sampling return shut-off valve 6 is installed on the circulation return pipeline 3. Both the sampling pipeline and the circulation return pipeline 3 are fitted with steam tracing jackets 4.
[0024] The usage process of this utility model is as follows: Before sampling, the right sampler 13 and the left sampler 16 are combined to make the sampling interface 11 and the liquid sulfur reflux interface 9 tightly connected.
[0025] Before sampling, the sampler should be purged with nitrogen: Connect the sampling port 11 of the sampler 10 to the low-pressure nitrogen port of the utility station (the low-pressure nitrogen can be 0.45 MPa nitrogen), open the reflux sampling valve 17 of the liquid sulfur reflux port 9 of the sampler 10, then open the low-pressure nitrogen valve of the utility station, and finally purge the gas inside the sampler 10 by controlling the sampling port sampling valve 12 of the sampler sampling port 11. After purging for 2-3 minutes, close the reflux sampling valve 17 of the sampler reflux port 9, then close the sampling port sampling valve 12 of the sampler sampling port 11, and finally close the low-pressure nitrogen valve.
[0026] After the replacement is completed, connect the sampling port 11 of the sampler 10 tightly to the sampling branch pipe 18, and connect the reflux sampling valve 17 of the sampling reflux port 11 of the sampler 10 tightly to the circulation reflux pipeline. Before formal sampling, it is necessary to confirm that the steam tracing jacket 4 is working properly and that the pipeline temperature is above 120℃. While starting the liquid sulfur pump 1, open the sampling shut-off valve, the sampling port sampling valve 12 of the sampling port 11, the reflux sampling valve 17 of the liquid sulfur reflux port 9, and the sampling reflux shut-off valve 6 to establish circulation of liquid sulfur in the sampling pipeline and the circulation reflux pipeline 3.
[0027] After completing the above preparations, wait for the liquid sulfur to circulate between the sampling pipeline, sampler 10, and recirculation pipeline 3 for a period of time to ensure that the sampler 10 is filled with liquid sulfur and in a circulating state before starting the formal sampling operation: First, close the sampling valve 12 of the sampling port 11 and turn off the liquid sulfur pump 1. Then, slightly open the sampling valve 12 of the sampling port 11 on the sampler 10, so that the liquid sulfur in the recirculation pipeline 3 and the sampler 10 flows back from the sampling valve 12 to the sampling pipeline under its own weight and further back to the liquid sulfur pool 2. When the amount of liquid sulfur in the sampler 10 drops to the required amount, close the sampling valve 12 of the sampling port 11 on the sampler 10 and close all other valves (sampling shut-off valve, recirculation sampling valve 17 of the liquid sulfur recirculation port 9, and sampling recirculation shut-off valve 6). Once the sampling thermometer 14 shows a temperature below 60°C, remove the sampler 10.
[0028] Store the sampler 10 properly, and disassemble the left sampler 16 and the right sampler 13 (before disassembly, open the sampling port valve 12 and the reflux sampling valve 17 on the sampler 10). You can then obtain a solid block sample of liquid sulfur. After bottling it in a 500ml conical flask, send it to the laboratory for component analysis.
[0029] In this invention, both the sampling pipeline and the circulating return pipeline 3 are fitted with steam heating jackets 4. By utilizing the stable heat supply of steam, the liquid sulfur can be prevented from solidifying during the sampling process in a highly efficient and reliable manner, ensuring the smooth progress of the sampling operation. Compared with other heating methods, jacket heating has significant advantages in the uniformity and stability of heat transfer.
[0030] In addition, the sampler 10 of this invention is pre-filled with inert gas before sampling, and the air inside the sampler 10 is replaced by inert gas, which can avoid the influence of air on the sample.
[0031] In addition, this invention enables the liquid sulfur to circulate before sampling, ensuring that the sample is sufficiently representative, improving the accuracy of the liquid sulfur composition analysis results, and providing a reliable basis for the stable operation and process optimization of the sulfur recovery device.
[0032] Example 2
[0033] Based on the liquid sulfur sampling system of the sulfur recovery device in Example 1, such as Figure 2 As shown, the right sampler 13 and the left sampler 16 are connected and fixed to each other by a connecting bolt 15. A connecting screw hole is provided at each of the four corners of the left sampler 16. The right sampler 13 begins its connection hole corresponding to the connecting screw hole. The connecting bolt 15 passes through the connecting hole and is screwed into it, ensuring a tight connection between the left sampler 16 and the right sampler 13. This arrangement allows for a detachable and fixed connection between the left sampler 16 and the right sampler 13, facilitating the rapid acquisition of samples.
[0034] Example 3
[0035] Based on the liquid sulfur sampling system of the sulfur recovery device in Example 1, such as Figure 2 As shown, to facilitate connection between the sampler 10 and the sampling pipeline and the circulation return pipeline 3, the liquid sulfur return port 9 is located at the top center of the right sampler 13, and the sampling interface 11 is located at the center of the left end face of the left sampler 16. For easy observation, the sampler thermometer 14 is located at the center of the right end face of the right sampler 13.
[0036] Example 4
[0037] Based on the liquid sulfur sampling system of the sulfur recovery device in Example 1, such as Figure 1 As shown, the sampling branch pipe 18 is equipped with a first sampling cut-off valve 7 and a second sampling cut-off valve 8. Closing the first sampling cut-off valve 7 cuts off the continued flow of liquid sulfur from the liquid sulfur pump 1 into the sampling branch pipe 18, while closing the second sampling cut-off valve 8 cuts off the supply of liquid sulfur from the sampling branch pipe 18 to the sampler 10. This design ensures that liquid sulfur cannot continue to enter the sampler 10 when the cut-off valves are closed, avoiding inaccurate test results due to inaccurate sampling volume.
[0038] Example 5
[0039] Based on the liquid sulfur sampling system of the sulfur recovery device in Example 1, such as Figure 1As shown, the sampling reflux shut-off valve 6 is located on the side of the circulation reflux pipeline 3 near the liquid sulfur reflux port 9. This ensures that after the sampling reflux shut-off valve 6 is closed, the liquid sulfur in the sampler 10 cannot enter the circulation reflux pipeline 3, further guaranteeing the accuracy of the sampling amount.
[0040] Example 6
[0041] Based on the liquid sulfur sampling system of the sulfur recovery device in Example 1, such as Figure 3 As shown, the sampler 10 has several sampling chambers 1001 inside, which are interconnected by chamber connecting pipes 1002 located at the top and bottom of the sampling chambers 1001. When liquid sulfur enters a sampling chamber 1001 through the sampling interface 11, it gradually fills each sampling chamber 1001 during the circulation process due to the interconnection of the chamber connecting pipes 1002. During reflux sampling, the liquid sulfur in each sampling chamber 1001 can also be made uniform through the chamber connecting pipes 1002, thus enabling the simultaneous sampling of multiple samples with consistent sampling volume or mass, avoiding the problems of excessive or insufficient sampling.
[0042] Example 7
[0043] Based on the liquid sulfur sampling system of the sulfur recovery device in Example 1, such as Figure 2 As shown, to facilitate monitoring of the sampling amount, a viewing window 19 is provided on the side wall of the sampler 10, and a sampling line 20 is provided on the viewing window 19. The sampling interface is located below the sampling line 20. The viewing window 19 is located on the side wall of the left sampler 16 or the right sampler 13. During sampling, the sampling line 20 should be horizontal. Sampling is complete when the top line of the liquid sulfur in the sampler 10 coincides with the sampling line 20 on the viewing window 19. This setting allows the user to easily observe the current liquid sulfur content in the sampler 10 to determine whether the sampling requirements have been met.
[0044] Example 8
[0045] Based on the liquid sulfur sampling system of the sulfur recovery device in Example 1, such as Figure 1 As shown, the circulation return pipeline 3 is connected to the top of the liquid sulfur tank 2 to prevent the liquid sulfur in the liquid sulfur tank 2 from putting pressure on the circulation return pipeline 3 during reflux, thus making the reflux smoother.
[0046] It should be noted and understood that various modifications and improvements can be made to the present invention as described in the above description without departing from the spirit and scope of the claims. Therefore, the scope of the claimed technical solutions is not limited to any specific exemplary teachings given.
Claims
1. A liquid sulfur sampling system for a sulfur recovery device, characterized in that, The system includes a liquid sulfur tank, sampling pipelines, a sampler, and a circulation return pipeline. The sampling pipelines include interconnected sampling branch pipes and a main liquid sulfur delivery pipeline. The inlet of the main liquid sulfur delivery pipeline is connected to a liquid sulfur pump located within the liquid sulfur tank. A sampling shut-off valve is installed on each sampling branch pipe. The sampler includes a sampler body, which is composed of a right sampler and a left sampler. The right sampler is equipped with a liquid sulfur return port. A reflux sampling valve is provided at the sampling point. The left side of the sampler is provided with a sampling interface, and a sampling interface sampling valve is provided at the sampling interface. The sampling interface is connected to the sampling branch pipe, and the liquid sulfur reflux port is connected to one end of the circulation reflux pipeline. The other end of the circulation reflux pipeline is connected to the liquid sulfur pool, and a sampling reflux shut-off valve is provided on the circulation reflux pipeline. Both the sampling pipeline and the circulation reflux pipeline are fitted with steam heating jackets. A sampler thermometer is also provided on the main body of the sampler.
2. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that, The right sampler and the left sampler are connected and fixed to each other by a coupling bolt.
3. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that, The liquid sulfur reflux port is located at the center of the top of the right sampler, and the sampling interface is located at the center of the left end face of the left sampler.
4. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that, A sampler thermometer is installed at the center of the right end face of the sampler.
5. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that, The sampling branch pipe is equipped with a first sampling cut-off valve and a second sampling cut-off valve.
6. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that, The sampling reflux shut-off valve is located on the side of the circulating reflux pipeline near the liquid sulfur reflux port.
7. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that, The sampler has several sampling chambers inside, which are interconnected by chamber connecting pipes located at the top and bottom of the sampling chambers.
8. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that: The sampler has a viewing window on its side wall, and a sampling line is provided on the viewing window; the sampling interface is located below the sampling line.
9. The liquid sulfur sampling system of the sulfur recovery device according to claim 8, characterized in that, The inspection window is located on the side wall of the left or right sampler.
10. The liquid sulfur sampling system of the sulfur recovery device according to claim 1, characterized in that, The other end of the circulating return pipeline is connected to the top of the liquid sulfur tank.