Sulfur-sealed tank with high sealing performance

Abstract

A sulfur-sealed tank with high sealing performance relates to the field of sulfur-sealed tanks and comprises a vertical sulfur-sealed tank body, the side wall of the sulfur-sealed tank body is provided with a liquid sulfur inlet and a liquid sulfur outlet, and the liquid sulfur outlet is located below the liquid sulfur inlet; a valve cylinder covering the liquid sulfur outlet is arranged in the sulfur-sealed tank body, a liquid sulfur channel communicated with an inner cavity of the valve cylinder and an inner cavity of the sulfur-sealed tank body is formed in the bottom of the valve cylinder, a second guide rod capable of vertically moving is arranged in the liquid sulfur channel in a penetrating manner, and a sealing plug capable of blocking the liquid sulfur channel is arranged on the second guide rod; a buoy is movably arranged in the sulfur sealing tank body, the bottom of the buoy is connected with a first guide rod, and the first guide rod and the second guide rod are in transmission connection through a lever assembly. According to the utility model, the float bowl and the sealing plug are connected through the lever, and a lever mechanism is adopted, so that higher sealing pressure and higher sealing capability are realized, and the sealing performance of the sulfur-sealed tank is improved.

Description

Technical Field

[0001] The utility model relates to the field of sulfur sealing cans, in particular to a sulfur sealing can with high sealing performance. Background Art

[0002] Sulfur seal tank, also known as liquid sulfur seal, is an essential safety equipment for the liquid sulfur system of sulfur recovery unit. Its principle is to use the sealing structure to effectively seal the process gas to avoid process gas leakage while allowing liquid sulfur to pass normally. The separated liquid sulfur is stored in the liquid sulfur pool, while the gas is discharged, thus ensuring the normal production of the unit.

[0003] In the liquid sulfur system, the position relationship between the traditional sulfur sealing tank and the liquid sulfur pool is as follows: Figure 4 As shown, the process gas comes from the upstream combustion furnace, the waste heat boiler or sulfur cooler is usually a ground equipment, and the liquid sulfur flows from the outlet of the waste heat boiler or sulfur cooler to the liquid sulfur pool in a gravity state. The liquid sulfur outlet is located at the lowest point of the outlet pipe box of the waste heat boiler or sulfur cooler, usually within 1m from the ground, and the total height of the traditional liquid sulfur sealing equipment is 4 to 5 meters. Therefore, it is necessary to dig a sulfur sealing pit next to the sulfur pool to place the liquid sulfur seal and its necessary operation and maintenance space. The traditional sulfur sealing pit has the following disadvantages: 1. The sulfur sealing pit needs to be excavated underground, and the civil engineering cost is high; 2. The interior of the sulfur sealing pit is a closed space, which easily causes H2S to accumulate at the bottom, and there are great safety hazards during operation and maintenance; 3. The liquid sulfur pipeline and the corresponding steam tracing pipeline in the sulfur sealing pit are not easy to lay, and the pipeline connecting to the liquid sulfur pool is easily damaged due to thermal expansion and contraction, resulting in leakage.

[0004] The prior art also discloses a solution for controlling the opening and closing of a sulfur sealing tank by the buoyancy of a float. This sulfur sealing tank generally uses the buoyancy of liquid sulfur in the sulfur sealing tank to lift the float so that the flow of liquid sulfur in the sulfur sealing tank remains unobstructed. When the amount of liquid sulfur in the sulfur sealing tank is small, the float sinks to block the liquid sulfur outlet of the sulfur sealing tank. This method of directly blocking the liquid sulfur flow channel by relying on the weight of the float itself has a general sealing effect. Utility Model Content

[0005] The utility model aims to provide a sulfur sealing tank with high sealing performance, so as to improve the sealing performance of the sulfur sealing tank.

[0006] In order to solve the above technical problems, the specific scheme adopted by the utility model is: a highly sealed sulfur sealing tank, comprising a vertical sulfur sealing tank body, the side wall of the sulfur sealing tank body is provided with a liquid sulfur inlet and a liquid sulfur outlet, and the liquid sulfur outlet is located below the liquid sulfur inlet; a valve cylinder covering the liquid sulfur outlet is provided in the sulfur sealing tank body, a liquid sulfur channel connecting the inner cavity of the valve cylinder and the inner cavity of the sulfur sealing tank body is opened at the bottom of the valve cylinder, a second guide rod capable of vertical movement is passed through the liquid flow channel, and a sealing plug capable of blocking the liquid sulfur channel is provided on the second guide rod; a float is movably provided in the sulfur sealing tank body, the bottom of the float is connected to a first guide rod, and the first guide rod and the second guide rod are connected by a lever assembly.

[0007] As a further optimization of the above technical solution, the lever assembly includes a lever and a support, and the support is arranged at the bottom of the valve cylinder.

[0008] As a further optimization of the above technical solution, a guide assembly for the first guide rod to slide through is provided in the sulfur sealing tank body.

[0009] As a further optimization of the above technical solution, the guide assembly includes a strip plate, and a first guide hole for the first guide rod to pass through is formed on the strip plate.

[0010] As a further optimization of the above technical solution, a limiting member is provided on the first guide rod, and the limiting member is located below the guide assembly.

[0011] As a further optimization of the above technical solution, a guide frame is arranged in the valve cylinder, and a second guide hole for the second guide rod to pass through is opened on the guide frame.

[0012] As a further optimization of the above technical solution, a filter is arranged in the sulfur sealing tank body between the liquid sulfur inlet and the buoy.

[0013] As a further optimization of the above technical solution, the filter is a filter mesh.

[0014] As a further optimization of the above technical solution, the liquid sulfur inlet and the liquid sulfur outlet are located on different sides of the sulfur sealing tank body.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model is connected between the float and the sealing plug through a lever, adopts a lever mechanism, has a greater sealing pressure and a higher sealing ability, and thus improves the sealing performance of the sulfur sealing tank.

[0017] The height of the highly sealed sulfur sealing tank of the utility model is only 1 / 4 of that of the traditional liquid sulfur sealing tank. The reduction in height enables the sulfur sealing tank to be transformed from an underground device to an above-ground device, thus avoiding many disadvantages of the sulfur sealing pit. The reduction in the height of the sulfur sealing tank enables the downstream liquid sulfur tank to be transformed into an above-ground device or a semi-buried device, thus reducing the construction cost of the liquid sulfur pool and making operation and maintenance more convenient. The height of the sulfur sealing tank is reduced, and the highly sealed sulfur sealing tank can be directly installed on the pipe mouth of the liquid sulfur tank, making the entire system more airtight, effectively preventing the leakage of harmful gases, and making replacement and maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0020] Figure 3 This is a schematic diagram of the positional relationship between the sulfur sealing tank and the liquid sulfur tank in the utility model;

[0021] Figure 4 It is a schematic diagram of the positional relationship between the conventional sulfur sealing tank and the liquid sulfur pool in the prior art;

[0022] Figure numerals: 1. sulfur sealing tank body, 2. filter, 3. float, 4. guide assembly, 401. strip plate, 402. fastening bolt, 403. support block, 5. valve cylinder, 501. top wall, 502. side wall, 503. bottom wall, 6. second guide rod, 601. fastener, 602. support member, 7. liquid sulfur outlet, 8. sealing plug, 9. guide frame, 10. lever assembly, 1001. lever, 1002. support, 11. first guide rod, 12. support boss, 13. limit member, 14. liquid sulfur inlet. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. Parts that are not described and disclosed in detail in the following description of the present invention, such as the installation method of the filter on the sulfur sealing tank, the arrangement method of the end covers at the upper and lower ends of the liquid sulfur tank, the connection between the liquid sulfur inlet and the upstream sulfur cooler, the connection between the liquid sulfur outlet and the downstream liquid sulfur tank in the liquid sulfur system, etc., should be understood as the prior art known or should be known to those skilled in the art.

[0024] like Figure 1As shown in the figure, the utility model discloses a sulfur seal tank with high sealing performance, which includes a vertical sulfur seal tank body 1 and end covers arranged at the upper and lower ends of the sulfur seal tank body 1. The sulfur seal tank body 1 is cylindrical, and can also be a square cylinder or a cylinder with other shapes. Its side wall 502 is provided with a liquid sulfur inlet 14 and a liquid sulfur outlet 7. The liquid sulfur inlet 14 and the liquid sulfur outlet 7 are located on different sides of the sulfur seal tank body 1, and the liquid sulfur inlet 14 is located above the liquid sulfur outlet 7. In this embodiment, the liquid sulfur inlet 14 is located in the upper left part of the sulfur seal tank body 1, and the liquid sulfur outlet 7 is located in the lower right part of the sulfur seal tank body 1.

[0025] A valve cylinder 5 covering the liquid sulfur outlet 7 is arranged in the sulfur seal tank body 1. As Figure 1 , Figure 2 shown, the valve cylinder 5 includes a top wall 501, a side wall 502 and a bottom wall 503. The side wall 502, the bottom wall 503 and the top wall 501 are all plate-like structures. The top wall 501 and the bottom wall 503 are both horizontally fixed on the inner wall of the sulfur seal tank body 1. The distance between the top wall 501 and the bottom wall 503 is not less than the diameter of the liquid sulfur outlet 7. The side wall 502 is vertically connected between the top wall 501 and the bottom wall 503. The valve cylinder 5 can be of different shapes, as long as its inner cavity is communicated with the liquid sulfur outlet 7. Taking the top wall 501 and the bottom wall 503 as square plates as an example, the side wall 502 is composed of three sequentially connected parts. One of the side walls 502 faces the liquid sulfur outlet 7, and the other two side walls 502 are arranged oppositely. The cross-section after the three side walls 502 are sequentially connected is in a C shape. A liquid sulfur channel is opened on the bottom wall 503 of the valve cylinder 5. The liquid sulfur entering the sulfur seal tank body 1 from the liquid sulfur inlet 14 can enter the circulation chamber through the liquid sulfur channel and then flow out from the liquid sulfur outlet 7 to the subsequent device.

[0026] In addition, the top wall 501 and the bottom wall 503 can also be set as semi-circular, and the side wall 502 is an arc-shaped plate with the same semi-circular radian as the top wall 501 and the bottom wall 503. The upper and lower ends of the arc-shaped side wall 502 are respectively fixedly and sealingly connected to the top wall 501 and the bottom wall 503. The two horizontal ends of the arc-shaped side wall 502 are respectively fixedly and sealingly connected to the inner wall of the sulfur seal tank body 1. The two horizontal ends of the arc-shaped side wall 502 are respectively connected to both sides of the liquid sulfur outlet 7, so that the side wall 502, the top wall 501 and the bottom wall 503 are located in the sulfur seal tank body 1 and cover the liquid sulfur outlet 7.

[0027] A second guide rod 6 that can move vertically is arranged through the liquid flow channel, and a sealing plug 8 that can block the liquid sulfur channel is arranged on the second guide rod 6.

[0028] A floating cylinder 3 is movably arranged in the sulfur seal tank body 1. A first guide rod 11 is connected to the bottom of the floating cylinder 3. The first guide rod 11 and the second guide rod 6 are传动连接,以通过第一导向杆11带动第二导向杆6上下活动。

[0029] It should be noted that there is an error in the original text in line . "传动连接" should be "driven and connected" in English. The corrected translation of this sentence is: A floating cylinder 3 is movably arranged in the sulfur seal tank body 1. A first guide rod 11 is connected to the bottom of the floating cylinder 3. The first guide rod 11 and the second guide rod 6 are driven and connected by a lever assembly 10 to drive the second guide rod 6 to move up and down through the first guide rod 11.The buoy 3 is cylindrical in shape, and the outer wall of the buoy 3 is made of corrosion-resistant stainless steel material, and the interior is filled with lightweight heat-resistant materials, such as expanded perlite, glass bricks, etc. The interior of the buoy 3 is at normal pressure at room temperature. However, in the working state, as the temperature rises, the internal pressure will reach about 0.15MPa. When operating in a long-term high temperature and high pressure environment, the buoy 3 may face the risk of leakage failure. In order to cope with this situation, the lightweight heat-resistant material filled inside the buoy 3 can slow down the entry of liquid sulfur. Even if a small amount of liquid sulfur enters the interior of the buoy 3, it will not immediately cause the entire equipment to fail.

[0030] The buoy 3 is coaxially distributed with the cylindrical sulfur sealing tank body 1, and the outer diameter of the buoy 3 is smaller than the inner diameter of the sulfur sealing tank body 1, so that the buoy 3 can move up and down in the sulfur sealing tank body 1. The upper and lower end surfaces of the buoy 3 are both configured as outwardly convex cylindrical surfaces, and this configuration can reduce the resistance generated by liquid sulfur when the buoy 3 floats up and down.

[0031] The lever assembly 10 includes a lever 1001 and a support 1002. The support 1002 is arranged at the bottom of the valve cylinder 5 and is located on the lower plate surface of the bottom wall 503 of the valve cylinder 5. The support 1002 includes two parallel connecting rods. The lower ends of the two connecting rods are laterally provided with a rotating shaft, and the rotating shaft can rotate relative to the connecting rods. The lever 1001 is connected to the rotating shaft. The lever 1001 can be fixedly connected or rotatably connected to the rotating shaft, so that it swings up and down with the rotating shaft as a fulcrum. One end of the lever 1001 faces the liquid sulfur channel at the bottom of the valve cylinder 5, and the other end is located at the bottom of the float 3, and the length between the lever fulcrum and the end thereof facing the liquid sulfur channel is less than the length of the end thereof located at the bottom of the float 3. The lever arm connecting the lever to the float is larger than the lever arm connecting the lever to the sealing plug. Compared with the way in which the float 3 uses its own gravity to block the liquid sulfur flow channel, the setting of the lever can increase the pressure transmitted from the float 3 to the sealing plug 8. That is, when the weight of the float 3 is the same, the structure of the utility model can significantly increase the force acting on the sealing plug 8 and improve the sealing performance of the device.

[0032] The sealing plug 8 is a conical plug with the tip pointing upward, and is made of a non-metallic material that is resistant to high temperatures, liquid sulfur corrosion, and has good resilience. Such a design can ensure the reliability of the sealing plug 8 in extreme working environments.

[0033] The second guide rod 6 is provided with a support member 602, which is a disc-shaped structure integrally formed with the second guide rod 6 or fixed on the second guide rod 6. The diameter of the support member 602 is smaller than the diameter of the large diameter end of the sealing plug 8. After the sealing plug 8 is inserted into the second guide rod 6, the lower end of the sealing plug 8 abuts against the support member 602, and then the fastener 601 is installed on the second guide rod 6 to fix the sealing plug 8. The rod body of the second guide rod 6 is also provided with a thread, and the distance between the threaded portion and the support member 602 is smaller than the height of the sealing plug 8. The fastener 601 is a nut used in conjunction with the thread.

[0034] A guide assembly 4 is provided in the sulfur sealing tank body 1 for the first guide rod 11 to slide through, and the guide assembly 4 includes a strip plate 401, and a first guide hole is provided on the strip plate 401 for the first guide rod 11 to pass through. Specifically, the guide assembly 4 includes a strip plate 401 transversely arranged in the sulfur sealing tank body 1, and a support block 403 is provided in the sulfur sealing tank body 1. The strip plate 401 is supported on the support block 403, and the connection between the strip plate 401 and the support block 403 is fixedly connected by a fastening bolt 402. The first guide hole is provided in the middle of the strip plate 401, and the diameter of the first guide hole is slightly larger than the diameter of the first guide rod 11. The strip plate 401 is mainly provided to form the first guide hole, so as to guide and constrain the first guide rod, so the width of the strip plate 401 can be larger than the diameter of the first guide hole, so as to prevent the strip plate 401 from being too wide and interfering with the flow of liquid sulfur.

[0035] In addition, the guide assembly 4 can also be configured as a guide ring that is concentrically distributed with the sulfur sealing tank body 1 and a connecting rod connected between the guide ring and the inner wall of the sulfur sealing tank body 1. The first guide hole provided in the guide assembly 4 is the center hole of the guide ring. The inner wall of the sulfur sealing tank body 1 is provided with a support block for supporting the connecting rod. The connecting rod and the support block are connected by bolts. In order to maintain the stability of the guide assembly 4, the number of connecting rods is set to be more than two. As a specific setting method, the connecting rods are set to be four. The four connecting rods are all arranged transversely in the sulfur sealing tank body 1. Each connecting rod keeps one end connected to the inner wall of the sulfur sealing tank body 1 and the other end is fixed to the guide ring. The four connecting rods are located in the same horizontal plane and are vertically distributed to each other. In addition, the specific structure of the guide assembly 4 can also be set to other forms. It is only necessary to ensure that the guide hole is formed. It will not be described one by one here.

[0036] A limit member 13 is provided on the first guide rod 11, and the limit member 13 is located below the guide assembly 4. The limit member 13 is an enlarged portion coaxial with the first guide rod 11, and its diameter is larger than the diameter of the guide hole. The limit member 13 may also be a fixed plate fixed on the second guide rod 6. It is only necessary to ensure that the setting of the limit member 13 can limit the floating degree of the float 3 from being too large, so as not to affect the normal use of the device.

[0037] A guide frame 9 is arranged in the valve cylinder 5, and a second guide hole is formed on the guide frame 9 for the second guide rod 6 to pass through. Specifically, the guide frame 9 is a U-shaped bent plate, both ends of the bent plate are fixed on the upper plate surface of the bottom wall 503 of the valve cylinder 5, and the second guide hole is formed in the middle of the bent plate; or, the guide frame 9 includes a plurality of vertical connecting rods fixed on the upper plate surface of the bottom wall 503 of the valve cylinder 5, and a connecting plate arranged at the end of the connecting rod, the connecting plate corresponds to the liquid sulfur channel and the diameter of the connecting plate is larger than the diameter of the liquid sulfur channel, and the second guide hole is formed in the middle of the connecting plate; in short, the setting of the guide frame 9 can form a second guide hole for the second guide rod 6 to pass through above the liquid sulfur channel, and its specific structure will not be repeated one by one.

[0038] When the utility model is in use, when the liquid level of the liquid sulfur in the sulfur sealing tank is low and the buoyancy of the float 3 is less than its own gravity, the float 3 drives the first guide rod 11 to move downward. Figure 1 The left end of the lever in the valve body descends, and the right end of the lever rises and pushes the second guide rod 6 to move upward, so that the sealing plug 8 blocks the liquid sulfur channel of the bottom wall 503 of the valve cylinder 5 to prevent liquid sulfur and process gas from flowing into the subsequent device; when the liquid sulfur level in the sulfur sealing tank rises, the buoyancy of the float 3 is greater than its own gravity, and the float 3 drives the first guide rod 11 to move upward. Figure 1 The left end of the middle lever rises under the drive of the first guide rod 11, and the right end of the lever descends to separate the sealing plug 8 from the liquid sulfur channel of the bottom wall 503 of the valve cylinder 5, and the liquid sulfur in the inner cavity of the sulfur sealing tank body 1 flows out through the liquid sulfur channel and the liquid sulfur outlet 7. In this process, the first guide hole provided in the guide assembly 4 and the second guide hole provided in the guide frame 9 guide the first guide rod 11 and the second guide rod 6 respectively, so that they can move up and down smoothly.

[0039] The first guide rod 11 and the second guide rod 6 are respectively hinged at the two ends of the lever, and the hinge method is the existing technology. As a specific hinge method, strip holes consistent with the length of the lever are opened at both ends of the lever. When the lever is in a horizontal state, the center line of the first guide rod 11 passes through the center of the strip hole at the left end of the lever, and the center line of the second guide rod 6 passes through the center of the strip hole at the right end of the lever. The lower ends of the first guide rod 11 and the second guide rod 6 are both provided with mounting shafts, which are used to be inserted into the corresponding strip holes to achieve hinge connection with the lever 1001. When the first guide rod 11 and the second guide rod 6 move up and down, the mounting shafts can slide and rotate in the corresponding strip holes along the length direction of the strip holes, thereby ensuring that the first guide rod 11 and the second guide rod 6 move up and down smoothly.

[0040] A filter 2 is provided in the sulfur sealing tank body 1 between the liquid sulfur inlet 14 and the float 3. The filter 2 is a filter screen. A support boss 12 for supporting the filter screen is provided in the sulfur sealing tank body 1. Impurities in the liquid sulfur are filtered by the filter screen, which not only ensures the quality of the liquid sulfur in the system, but also prevents impurities from entering the contact between the first guide rod 11 and the guide assembly 4, and between the sealing plug 8 and the liquid sulfur channel to a certain extent, affecting the normal use of the device. In addition, the contact area between the guide rod (including the first guide rod and the second guide rod) and the corresponding guide hole (including the first guide hole and the second guide hole) is very small. Even if impurities are deposited in the contact area, it only needs to overcome a small shear resistance to operate normally, thereby effectively preventing the float 3 from being stuck.

[0041] like Figure 3 As shown, the sulfur sealing tank of the utility model is applied in the liquid sulfur system. The height of the sulfur sealing tank is only 1 / 4 of the traditional sulfur sealing tank. The reduction in height makes the sulfur sealing tank change from underground equipment to above-ground equipment, avoiding many disadvantages of setting up sulfur sealing pits. The reduction in the height of the sulfur sealing tank can make the downstream liquid sulfur storage tank become above-ground equipment or semi-buried equipment, reducing the construction cost of the sulfur pool and making operation and maintenance more convenient. The sulfur sealing tank can be directly installed on the pipe mouth of the liquid sulfur storage tank, so that the whole system has better airtightness, which can effectively prevent the leakage of harmful gases and make replacement and maintenance more convenient.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly airtight sulfur sealing tank, comprising a vertical sulfur sealing tank body (1), characterized in that: A liquid sulfur inlet (14) and a liquid sulfur outlet (7) are provided on the side wall of the sulfur sealing tank body (1), and the liquid sulfur outlet (7) is located below the liquid sulfur inlet (14); A valve cylinder (5) covering a liquid sulfur outlet (7) is arranged in the sulfur sealing tank body (1); a liquid sulfur passage connecting the inner cavity of the valve cylinder (5) and the inner cavity of the sulfur sealing tank body (1) is opened at the bottom of the valve cylinder (5); a second guide rod (6) capable of vertical movement passes through the liquid flow passage; and a sealing plug (8) capable of blocking the liquid sulfur passage is arranged on the second guide rod (6); A buoy (3) is movably arranged in a sulfur sealing tank body (1), a first guide rod (11) is connected to the bottom of the buoy (3), and the first guide rod (11) and a second guide rod (6) are transmission-connected via a lever assembly (10).

2. A highly airtight sulfur sealing can according to claim 1, characterized in that: The lever assembly (10) comprises a lever (1001) and a support (1002), wherein the support (1002) is arranged at the bottom of the valve cylinder (5).

3. A highly airtight sulfur sealing can according to claim 1, characterized in that: A guide assembly (4) for a first guide rod (11) to slide through is arranged in the sulfur sealing tank body (1).

4. A highly airtight sulfur sealing can according to claim 3, characterized in that: The guide assembly (4) comprises a strip plate (401), and a first guide hole for the first guide rod (11) to pass through is formed on the strip plate (401).

5. A highly airtight sulfur sealing can according to claim 3, characterized in that: A limiting member (13) is provided on the first guide rod (11), and the limiting member (13) is located below the guide assembly (4).

6. A highly airtight sulfur sealing can according to claim 1, characterized in that: A guide frame (9) is arranged inside the valve cylinder (5), and a second guide hole for the second guide rod (6) to pass through is opened on the guide frame (9).

7. A highly airtight sulfur sealing can according to claim 1, characterized in that: A filter (2) is arranged in the sulfur sealing tank body (1) between the liquid sulfur inlet (14) and the float (3).

8. A highly airtight sulfur sealing can according to claim 7, characterized in that: The filter (2) is a filter screen.

9. A highly airtight sulfur sealing can according to claim 1, characterized in that: The liquid sulfur inlet (14) and the liquid sulfur outlet (7) are located on different sides of the sulfur sealing tank body (1).

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