Sulfur-rich gas pipeline pressure stabilizing system

Abstract

The utility model provides a pressure stabilizing system for a sulfur-rich gas pipeline, which belongs to the technical field of pressure regulation and comprises a primary reverse spray scrubber, a secondary reverse spray scrubber, a sulfur-rich pipe connected with the primary reverse spray scrubber and the secondary reverse spray scrubber, and a liquid discharge pipe communicated with the sulfur-rich pipe, the liquid discharging pipe is used for discharging condensate water in the sulfur-rich pipe, the liquid discharging pipe comprises a flow guiding section, a liquid sealing section and a liquid discharging section which are sequentially distributed, the flow guiding section is communicated with the sulfur-rich pipe, the middle part of the liquid sealing section protrudes upwards or downwards, and the condensate water resides in the liquid sealing section, so that the liquid sealing section is blocked. The utility model provides a sulfur-rich gas pipeline pressure stabilizing system, and aims to solve the problem that the safety production of a whole flue gas treatment system is influenced due to the sudden change of pressure in a pipeline when a large amount of condensed water remained in the pipeline is discharged by adopting a drain valve.

Description

Technical Field

[0001] This utility model belongs to the field of pressure regulation technology, and more specifically, it relates to a pressure stabilization system for sulfur-rich gas pipelines. Background Technology

[0002] In the desulfurization and denitrification system, the sulfur dioxide-rich flue gas precipitated from the stripping tower needs to be purified by dust removal before entering the subsequent conversion system. The specific process flow is as follows: The sulfur-rich gas is first transported to the purification section through pipelines, and then passes through a primary reverse-jet scrubber for preliminary cooling and dust removal, reducing the gas temperature from 350℃ to 80℃; subsequently, it enters a secondary reverse-jet scrubber for secondary purification, further reducing the temperature to around 55℃; the cooled and purified gas continues to enter the packed tower for deep dust removal; finally, it undergoes adiabatic evaporation and dilute acid washing through two-stage electrostatic precipitators. In the above process flow, the sulfur-rich gas transport pipeline in the entire purification section maintains a negative pressure operation. However, in actual production, due to site constraints, the connecting pipeline between the primary and secondary reverse-jet scrubbers is often excessively long. When the high-temperature sulfur-rich gas experiences a rapid temperature drop in this section of the pipeline, a large amount of condensate forms on the inner wall of the pipeline. Especially under negative pressure, this condensate easily forms suspended liquid at the bends where the horizontal pipe turns into the vertical pipe.

[0003] This condensation buildup significantly disrupts the pressure stability of the pipeline system, causing the sulfur-rich gas transport pressure to plummet from 9 kPa to 2 kPa. This sudden pressure drop not only impedes gas transport and hinders the normal sulfur removal from the desorption tower, forcing excess sulfur-rich gas to escape into the atmosphere, but also triggers abnormal reabsorption by the activated carbon, severely weakening the desulfurization efficiency of the adsorption tower. Directly draining the condensate from the pipeline with a drain valve would cause a sudden pressure change, directly interfering with the stable transport of sulfur-rich gas and disrupting the established rhythm of the entire production system, increasing the risk of operational fluctuations in upstream and downstream equipment. Utility Model Content

[0004] The purpose of this invention is to provide a pressure stabilization system for sulfur-rich gas pipelines, which aims to solve the problem that using a drain valve to discharge a large amount of condensate water remaining in the pipeline will cause a sudden change in the pressure inside the pipeline, affecting the safe production of the entire flue gas treatment system.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A sulfur-rich gas pipeline pressure stabilization system is provided, including a primary backflow scrubber, a secondary backflow scrubber, and a sulfur-rich pipe connecting the primary and secondary backflow scrubbers. The system also includes a drain pipe connected to the sulfur-rich pipe for draining condensate from the pipe. The drain pipe comprises a guide section, a liquid seal section, and a drain section arranged sequentially. The guide section is connected to the sulfur-rich pipe. The middle portion of the liquid seal section protrudes upwards or downwards, allowing condensate to remain in the liquid seal section and thus sealing it.

[0007] In one possible implementation, the inner wall of the sulfur-rich pipe is provided with a hydrophobic layer, which is used to reduce the amount of condensate adhering inside the sulfur-rich pipe.

[0008] In one possible implementation, the sulfur-rich pipe has a downwardly projecting retention section, and the guide section is connected to the retention section.

[0009] In one possible implementation, the sulfur-rich gas pipeline pressure stabilization system further includes a gas-liquid separator located at the bend of the sulfur-rich pipeline.

[0010] In one possible implementation, multiple liquid seal sections are arranged sequentially at intervals, and a connecting section is provided between two adjacent liquid seal sections. The connecting section is a straight pipe. The sulfur-rich gas pipeline pressure stabilization system also includes a liquid level sensor and an electromagnetic drain valve located in the liquid seal section, as well as a controller that is communicatively connected to the liquid level sensor and the electromagnetic drain valve.

[0011] In one possible implementation, the sulfur-rich gas pipeline pressure stabilization system further includes a pressure balancing pipeline connecting the sulfur-rich pipe and the secondary backflow scrubber, as well as a regulating valve on the pressure balancing pipeline and a pressure sensor inside the sulfur-rich pipe. The regulating valve and the pressure sensor are both communicatively connected to a controller. The pressure balancing pipeline includes a first balancing pipe and a second balancing pipe connected in parallel. The first balancing pipe is used to introduce gas from the secondary backflow scrubber into the sulfur-rich pipe, and the second balancing pipe is used to introduce gas from the sulfur-rich pipe into the secondary backflow scrubber.

[0012] In one possible implementation, the sulfur-rich gas pipeline pressure stabilization system further includes a regulating pipe connected to the liquid seal section and the pressure balancing pipeline, and a pressure detector located in the liquid seal section. The regulating pipe includes a main pipe and two branch pipes connected in parallel to the main pipe. The main pipe is connected to the liquid seal section, one of the branch pipes is connected to the first balancing pipeline, and the other branch pipe is connected to the second balancing pipeline. The pressure detector is communicatively connected to the controller.

[0013] In one possible implementation, the sulfur-rich gas pipeline pressure stabilization system further includes a circulation pipe connecting the guide section and the sulfur-rich pipe, an atomizer located in the guide section, and a gas-liquid separation and recovery device located downstream of the sulfur-rich pipe. The gas outlet pipe of the gas-liquid separation and recovery device is connected to the sulfur-rich pipe, and the liquid outlet pipe is connected to the liquid recovery device.

[0014] In one possible implementation, the bend of the sulfur-rich pipe is a variable-diameter pipe body, the inner diameter of the bend gradually decreases along the airflow direction, and a spiral guide groove is also provided inside the bend, so that the airflow forms a vortex after passing through the guide groove.

[0015] In one possible implementation, the sulfur-rich gas pipeline pressure stabilization system further includes a water collection tank located below the drainage section.

[0016] The beneficial effects of the sulfur-rich gas pipeline pressure stabilization system provided by this utility model are as follows: Compared with the prior art, the condensate in the sulfur-rich pipe flows into the drain pipe. By designing the drain pipe into a guide section, a liquid seal section, and a drain section, and utilizing the protruding structure in the middle of the liquid seal section, the condensate naturally resides in the liquid seal section and forms a liquid seal. This achieves effective collection of condensate without disrupting the negative pressure operation of the pipeline, avoiding the problem of suspended liquid accumulation at pipe bends, thus ensuring the pressure stability of the pipeline system and preventing sudden drops in the pressure of sulfur-rich gas transmission. Simultaneously, this liquid seal structure eliminates the need for a drain valve, preventing pressure fluctuations caused by direct drainage, avoiding interference with the stable transmission of sulfur-rich gas, maintaining the established rhythm of the production system, reducing the risk of operational fluctuations in upstream and downstream equipment, reducing sulfur-rich gas escape and abnormal reabsorption of activated carbon, ensuring the desulfurization efficiency of the adsorption tower, and greatly improving the safety level of the entire flue gas treatment system, providing a reliable guarantee for the continuity and stability of industrial production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the sulfur-rich gas pipeline pressure stabilization system provided in Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the sulfur-rich gas pipeline pressure stabilization system provided in Embodiment 2 of this utility model;

[0020] Figure 3This is a schematic diagram of the sulfur-rich gas pipeline pressure stabilization system provided in Embodiment 3 of this utility model;

[0021] Figure 4 This is a schematic diagram of the sulfur-rich gas pipeline pressure stabilization system provided in Embodiment 4 of this utility model.

[0022] In the diagram: 1. Primary backflow scrubber; 2. Secondary backflow scrubber; 3. Sulfur-rich pipe; 301. Retention section; 4. Drain pipe; 401. Guide section; 402. Liquid seal section; 403. Drain section; 404. Connecting section; 405. Switch valve; 5. Water collection tank; 6. Pressure balancing pipeline; 601. First balancing pipe; 602. Second balancing pipe; 7. Regulating valve; 8. Regulating pipe; 801. Main pipe; 802. Branch pipe; 9. Atomizer; 10. Circulation pipe; 11. Gas-liquid separation and recovery device. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. 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 present utility model.

[0024] In the claims, description, and accompanying drawings of this utility model, unless otherwise expressly defined, the terms "first," "second," or "third," etc., are used to distinguish different objects, not to describe a specific order. Unless otherwise stated, other directional terms, such as "vertical," "clockwise," and "counterclockwise," indicate orientation or positional relationships based on the orientation and positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, not to indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this utility model. In the claims, description, and accompanying drawings of this utility model, unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" should be interpreted broadly, that is, any connection method in which there is no displacement relationship or relative rotation relationship between the two, that is, including non-removable fixed connection, detachable fixed connection, integral connection, and fixed connection through other devices or elements. In the claims, description, and accompanying drawings of this utility model, the terms "comprising," "having," and their variations are intended to mean "including but not limited to."

[0025] It should be noted that in actual field applications, the distance between the primary and secondary backflow scrubbers is relatively large, and the sulfur-rich pipes connecting the primary and secondary backflow scrubbers have multiple longitudinal and transverse distribution areas, thus there are bends. Figure 1 This is a simplified version of the sulfur-rich pipe.

[0026] Please refer to the following: Figures 1 to 4 The present invention provides a description of a sulfur-rich gas pipeline pressure stabilization system. The sulfur-rich gas pipeline pressure stabilization system includes a primary backflow scrubber 1, a secondary backflow scrubber 2, and a sulfur-rich pipe 3 connecting the primary and secondary backflow scrubbers 1 and 2. It also includes a drain pipe 4 connected to the sulfur-rich pipe 3, which is used to drain condensate from the sulfur-rich pipe 3. The drain pipe 4 includes a guide section 401, a liquid seal section 402, and a drain section 403 arranged sequentially. The guide section 401 is connected to the sulfur-rich pipe 3. The middle part of the liquid seal section 402 protrudes upwards or downwards, and condensate remains in the liquid seal section 402, thus sealing the liquid seal section 402.

[0027] The sulfur-rich gas pipeline pressure stabilization system provided by this utility model, compared with the prior art, allows condensate in the sulfur-rich pipe 3 to flow into the drain pipe 4. By designing the drain pipe 4 as a guide section 401, a liquid seal section 402, and a drain section 403, and utilizing the protruding structure in the middle of the liquid seal section 402, the condensate naturally resides in the liquid seal section 402 and forms a liquid seal. This achieves effective collection of condensate without disrupting the negative pressure operation of the pipeline, avoiding the problem of suspended liquid accumulation at pipe bends, thus ensuring the pressure stability of the pipeline system and preventing sudden drops in the pressure of sulfur-rich gas transmission. Simultaneously, this liquid seal structure eliminates the need for a drain valve, preventing pressure fluctuations caused by direct drainage, avoiding interference with the stable transmission of sulfur-rich gas, maintaining the established rhythm of the production system, reducing the risk of operational fluctuations in upstream and downstream equipment, reducing sulfur-rich gas escape and abnormal reabsorption of activated carbon, ensuring the desulfurization efficiency of the adsorption tower, greatly improving the safety level of the entire flue gas treatment system, and providing a reliable guarantee for the continuity and stability of industrial production.

[0028] Specifically, the liquid seal section 402 has a U-shaped structure or a corrugated structure.

[0029] Optionally, a switch valve 405 is provided on the drain pipe 4. In the initial stage, when there is no condensate seal in the liquid seal section 402, the switch valve 405 is closed to prevent the drain pipe 4 from connecting the sulfur-rich pipe 3 to the outside, which would disrupt the negative pressure state inside the sulfur-rich pipe 3. When there is a certain amount of condensate in the sulfur-rich pipe 3, the switch valve 405 is opened to discharge the condensate into the liquid seal section 402.

[0030] In some embodiments, please refer to Figure 1 The inner wall of the sulfur-rich pipe 3 is provided with a hydrophobic layer, which is used to reduce the amount of condensate adhering inside the sulfur-rich pipe 3.

[0031] In this embodiment, a hydrophobic layer is installed on the inner wall of the sulfur-rich pipe 3, reducing the amount of condensate adhering at the source and greatly improving the stability and safety of the system operation. On the one hand, the hydrophobic layer effectively reduces the amount of condensate formed on the inner wall of the pipe when the high-temperature sulfur-rich gas cools down, preventing a large amount of condensate from accumulating at the bend where the horizontal pipe turns into the vertical pipe, thus preventing the problem of sudden pressure drop in the pipeline system caused by liquid accumulation, maintaining the stable pressure of sulfur-rich gas transportation, ensuring normal sulfur discharge from the desorption tower, and preventing the escape of sulfur-rich gas from polluting the atmosphere and the abnormal reabsorption of activated carbon, which weakens the desulfurization efficiency. On the other hand, due to the reduction in the amount of condensate adhering, the risk of sudden pressure changes in the pipeline caused by direct drainage is reduced, reducing interference with the stable transportation of sulfur-rich gas, maintaining the established rhythm of the production system, reducing the risk of operational fluctuations in upstream and downstream equipment, ensuring the safe production of the entire flue gas treatment system, and extending the service life of the pipeline and related equipment.

[0032] In some embodiments, please refer to Figure 2 The sulfur-rich pipe 3 has a downwardly protruding retention section, and the guide section 401 is connected to the retention section.

[0033] Under the influence of gravity, the condensate in the sulfur-rich pipe 3 will naturally converge to the retention section, preventing condensate from accumulating randomly in other parts of the pipe and thus avoiding obstruction of the flow of sulfur-rich gas or causing local pressure imbalance. This ensures stable pressure within the pipe, maintains smooth transport of sulfur-rich gas, and guarantees normal sulfur removal from the desorption tower and desulfurization efficiency of the adsorption tower. Simultaneously, the precise connection between the guide section 401 and the retention section provides a directional flow channel for the condensate, allowing it to flow more efficiently into the liquid seal section 402 of the drain pipe 4. Compared to a pipe design without a retention section, this significantly reduces the amount of condensate remaining in the sulfur-rich pipe 3, lowers the impact of subsequent drainage operations on system pressure, and reduces the risk of operational disruptions in the production system caused by pressure fluctuations.

[0034] Optionally, the retention section 301 is a downwardly curved arc-shaped tubular structure.

[0035] In some embodiments, not shown in the figures, the sulfur-rich gas pipeline pressure stabilization system further includes a gas-liquid separator located at the bend of the sulfur-rich pipe 3.

[0036] When sulfur-rich gas flows through an elbow, the gas-liquid separator utilizes centrifugal force and gravity to quickly and efficiently separate condensate from the gas, preventing condensate from accumulating at the elbow and forming liquid resistance. This ensures smooth flow of sulfur-rich gas, prevents sudden pressure drops in the pipeline system due to liquid accumulation, and ensures stable gas delivery pressure within a reasonable range, providing stable conditions for sulfur removal in the desorption tower and desulfurization in the adsorption tower. Simultaneously, the separated condensate can be discharged systematically through structures such as the guide section 401. Compared to situations without a gas-liquid separator, this significantly reduces the frequency and difficulty of subsequent drainage operations, minimizes pressure disturbances during drainage, and maintains a stable operating rhythm for the production system. Furthermore, the gas-liquid separator effectively reduces contact between condensate and the inner wall of the pipeline, lowering the risk of pipeline damage due to long-term corrosion from condensate.

[0037] In some embodiments, please refer to Figure 2 Multiple liquid seal sections 402 are arranged at intervals in sequence, and a connecting section 404 is provided between two adjacent liquid seal sections 402. The connecting section 404 is a straight pipe. The sulfur-rich gas pipeline pressure stabilization system also includes a liquid level sensor and an electromagnetic drain valve installed in the liquid seal section 402, as well as a controller that is connected to the liquid level sensor and the electromagnetic drain valve.

[0038] Multiple spaced liquid seal sections 402 form a multi-stage condensate trapping structure, enabling phased collection of condensate from the pipeline. Compared to a single liquid seal section 402, this significantly increases condensate storage capacity and effectively reduces the impact of accumulated liquid on pipeline pressure. The straight pipe design connecting adjacent liquid seal sections 402 ensures smooth flow of condensate between sections, preventing pressure imbalance caused by localized water accumulation. A level sensor monitors the water level in the liquid seal sections 402 in real time and transmits the signal to the controller. When the water level reaches a preset threshold, the controller automatically triggers the electromagnetic drain valve to open, achieving precise condensate discharge. This automated drainage mechanism avoids the risk of sudden pressure changes caused by manual drainage and allows for flexible adjustment of drainage timing based on actual liquid accumulation, maintaining stable pipeline pressure and ensuring continuous and efficient transport of sulfur-rich gases.

[0039] In some embodiments, please refer to Figure 3 The sulfur-rich gas pipeline pressure stabilization system also includes a pressure balancing pipeline 6 connecting the sulfur-rich pipe 3 and the secondary backflow scrubber 2, as well as a regulating valve 7 installed on the pressure balancing pipeline 6 and a pressure sensor installed in the sulfur-rich pipe 3. The regulating valve 7 and the pressure sensor are both connected to the controller. The pressure balancing pipeline 6 includes a first balancing pipe 601 and a second balancing pipe 602 connected in parallel. The first balancing pipe 601 is used to introduce the gas in the secondary backflow scrubber 2 into the sulfur-rich pipe 3, and the second balancing pipe 602 is used to introduce the gas in the sulfur-rich pipe 3 into the secondary backflow scrubber 2.

[0040] The parallel first balancing pipe 601 and second balancing pipe 602 form a bidirectional pressure regulation channel. When the pressure sensor detects that the pressure in the sulfur-rich pipe 3 is lower than the set threshold, the controller immediately commands the corresponding regulating valve 7 to open the first balancing pipe 601, quickly introducing low-pressure gas from the secondary backflow scrubber 2 into the sulfur-rich pipe 3 to promptly increase the pipeline pressure. If the pressure is too high, the second balancing pipe 602 automatically activates, venting excess gas from the sulfur-rich pipe 3 into the secondary backflow scrubber 2, achieving bidirectional pressure regulation and ensuring that the pressure in the sulfur-rich pipe 3 remains within a stable range. This avoids problems such as poor gas delivery and obstructed sulfur removal from the desorption tower due to sudden pressure changes. This automated pressure regulation mechanism has a faster response speed and higher regulation accuracy, effectively reducing the interference of pressure fluctuations on the production system rhythm and ensuring the stable operation of upstream and downstream equipment. At the same time, the coordinated operation of the pressure balancing pipeline 6 and the intelligent control components reduces equipment wear caused by pressure instability and extends the service life of equipment such as the sulfur-rich pipe 3 and the scrubber.

[0041] Optionally, regulating valve 7 is a one-way valve.

[0042] In some embodiments, please refer to Figure 3 The sulfur-rich gas pipeline pressure stabilization system also includes a regulating pipe 8 connected to the liquid seal section 402 and the pressure balance pipeline 6, and a pressure detector located in the liquid seal section 402. The regulating pipe 8 includes a main pipe 801 and two branch pipes 802 connected in parallel to the main pipe 801. The main pipe 801 is connected to the liquid seal section 402, one branch pipe 802 is connected to the first balance pipeline 601, and the other branch pipe 802 is connected to the second balance pipeline 602. The pressure detector is communicatively connected to the controller.

[0043] The pressure detector monitors the pressure data of the liquid seal section 402 in real time and feeds the signal back to the controller. When abnormal pressure fluctuations are detected in the liquid seal section 402, the controller can control the opening and closing of the two branch pipes 802 according to the pressure status of the sulfur-rich pipe 3. If the pressure in the sulfur-rich pipe 3 is insufficient and the pressure in the liquid seal section 402 is too high, the controller opens the branch pipe 802 connected to the first balance pipe 601, introducing some gas from the liquid seal section 402 into the sulfur-rich pipe 3. This reduces the pressure in the liquid seal section 402 to prevent liquid seal damage and increases the pressure in the sulfur-rich pipe 3. Conversely, when the pressure in the sulfur-rich pipe 3 is too high and the pressure in the liquid seal section 402 is low, the branch pipe 802 connected to the second balance pipe 602 is activated, venting gas from the sulfur-rich pipe 3 into the liquid seal section 402, achieving bidirectional pressure regulation. This pressure coordination regulation mechanism effectively avoids the impact of pressure changes in the sulfur-rich pipe 3 on the stability of the liquid seal, ensuring that the liquid seal always plays its role in isolating gas and preventing leakage. Meanwhile, the coordinated operation of regulating pipe 8, pressure balancing pipe 6, and liquid seal section 402 forms a multi-level pressure buffer and regulation network. Compared with a single pressure regulation method, it significantly improves the system's ability to cope with sudden pressure changes, reduces the risk of equipment failure and production interruption caused by abnormal pressure, and lowers equipment maintenance costs.

[0044] In some embodiments, please refer to Figure 4 The sulfur-rich gas pipeline pressure stabilization system also includes a circulation pipe 10 connecting the flow guide section 401 and the sulfur-rich pipe 3, an atomizer 9 located in the flow guide section 401, and a gas-liquid separation and recovery device 11 located downstream of the sulfur-rich pipe 3. The gas outlet pipe of the gas-liquid separation and recovery device 11 is connected to the sulfur-rich pipe 3, and the liquid outlet pipe is connected to the liquid recovery device.

[0045] An atomizer 9 is installed in the guide section 401 of the drain pipe 4. When condensate enters the guide section 401, the atomizer 9 atomizes it into tiny droplets, which mix with the sulfur-rich gas and then re-enter the sulfur-rich pipe 3 along the circulation pipe 10. Simultaneously, a gas-liquid separation and recovery device 11 is added downstream of the sulfur-rich pipe 3 to further separate the mixed gas and liquid. The separated liquid enters the liquid recovery device, while the gas continues to enter the sulfur-rich pipe 3. This scheme utilizes atomization technology to change the form of condensate, preventing condensate accumulation and achieving liquid recycling.

[0046] Specifically, the gas-liquid separation and recovery device 11 is located downstream of the circulation pipe 10.

[0047] In some embodiments, not shown in the figure, the bend of the sulfur-rich pipe 3 is a variable diameter pipe body, the inner diameter of the bend gradually decreases along the airflow direction, and a spiral guide groove is also provided inside the bend, so that the airflow forms a vortex after passing through the guide groove.

[0048] When a mixture of sulfur-rich gas and condensate passes through an elbow, the tapered pipe diameter accelerates the gas flow rate, using the high-speed airflow to carry the condensate through the elbow, while the spiral guide groove guides the liquid to flow along the pipe wall, preventing liquid from accumulating at the elbow.

[0049] In some embodiments, please refer to Figures 1 to 4 The sulfur-rich gas pipeline pressure stabilization system also includes a water collection tank 5 located below the drainage section 403.

[0050] The water collection tank 5 can collect the condensate discharged by the accelerated transport of sulfur-rich gas via the bend-reducing structure of the sulfur-rich pipe 3 and the spiral guide channel in a timely and efficient manner, preventing secondary backflow or residue of liquid in the pipeline and ensuring unobstructed flow in the drainage section 403. The water collection tank 5 also centrally treats the collected condensate, facilitating subsequent purification or recovery of impurities and sulfides carried in the sulfur-rich gas. This reduces the corrosive impact of liquids on pipelines and equipment, extends the service life of the entire pressure stabilization system, and lowers the risk of environmental pollution, achieving green, efficient, and safe operation of the sulfur-rich gas transport process.

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

Claims

1. A sulfur-rich gas pipeline pressure stabilization system, characterized by, The system includes a primary backflow scrubber, a secondary backflow scrubber, and a sulfur-rich pipe connecting the primary and secondary backflow scrubbers. It also includes a drain pipe connected to the sulfur-rich pipe, which is used to drain condensate from the sulfur-rich pipe. The drain pipe includes a guide section, a liquid seal section, and a drain section arranged sequentially. The guide section is connected to the sulfur-rich pipe. The middle part of the liquid seal section protrudes upwards or downwards, and condensate is retained in the liquid seal section to seal it.

2. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The inner wall of the sulfur-rich pipe is provided with a hydrophobic layer, which is used to reduce the amount of condensate adhering inside the sulfur-rich pipe.

3. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The sulfur-rich pipe has a downwardly protruding retention section, and the guide section is connected to the retention section.

4. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The sulfur-rich gas pipeline pressure stabilization system also includes a gas-liquid separator located at the bend of the sulfur-rich pipeline.

5. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The liquid seal sections are arranged in sequence at intervals, and a connecting section is provided between two adjacent liquid seal sections. The connecting section is a straight pipe. The sulfur-rich gas pipeline pressure stabilization system also includes a liquid level sensor and an electromagnetic drain valve installed in the liquid seal section, as well as a controller that is communicatively connected to the liquid level sensor and the electromagnetic drain valve.

6. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The sulfur-rich gas pipeline pressure stabilization system also includes a pressure balancing pipeline connecting the sulfur-rich pipe and the secondary backflow scrubber, as well as a regulating valve on the pressure balancing pipeline and a pressure sensor inside the sulfur-rich pipe. The regulating valve and the pressure sensor are both communicatively connected to the controller. The pressure balancing pipeline includes a first balancing pipe and a second balancing pipe connected in parallel. The first balancing pipe is used to introduce gas from the secondary backflow scrubber into the sulfur-rich pipe, and the second balancing pipe is used to introduce gas from the sulfur-rich pipe into the secondary backflow scrubber.

7. The sulfur-rich gas pipeline pressure stabilization system of claim 6, wherein, The sulfur-rich gas pipeline pressure stabilization system further includes a regulating pipe connected to the liquid seal section and the pressure balancing pipeline, and a pressure detector located in the liquid seal section. The regulating pipe includes a main pipe and two branch pipes connected in parallel to the main pipe. The main pipe is connected to the liquid seal section, one of the branch pipes is connected to the first balancing pipe, and the other branch pipe is connected to the second balancing pipe. The pressure detector is communicatively connected to the controller.

8. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The sulfur-rich gas pipeline pressure stabilization system also includes a circulation pipe connecting the guide section and the sulfur-rich pipe, an atomizer located in the guide section, and a gas-liquid separation and recovery device located downstream of the sulfur-rich pipe. The gas outlet pipe of the gas-liquid separation and recovery device is connected to the sulfur-rich pipe, and the liquid outlet pipe is connected to the liquid recovery device.

9. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The bend of the sulfur-rich pipe is a variable diameter pipe body, and the inner diameter of the bend gradually decreases along the airflow direction. A spiral guide groove is also provided inside the bend, and the airflow forms a vortex after passing through the guide groove.

10. The sulfur-rich gas pipeline pressure stabilization system of claim 1, wherein, The sulfur-rich gas pipeline pressure stabilization system also includes a water collection tank located below the drainage section.

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