Sulfur melting device

Abstract

The utility model provides a sulfur melting device which comprises a sulfur melting tank, at least one set of heat exchange coil pipe is arranged in the sulfur melting tank, and an input pipe and an output pipe of the heat exchange coil pipe penetrate through one side wall of the sulfur melting tank; the stirring device is arranged in a space defined by the heat exchange coil pipe, and the stirring device is further fixed in the sulfur melting pool through a fixing frame arranged on the sulfur melting pool; the heat exchange jacket covers the periphery of the upper part of the sulfur melting tank; the overflow groove is formed in the upper part of one side surface of the sulfur melting tank and penetrates through the heat exchange jacket. According to the device, the heat exchange jacket is arranged at the upper part of the sulfur melting pool, so that sulfur adhered to the inner wall of the sulfur melting pool is heated and melted to flow into the pool, the situation that the sulfur is adhered to the wall and corrodes the sulfur melting pool is reduced, and the defects that in the existing sulfur melting device, the temperature of liquid sulfur near the container wall is low and the sulfur melting effect is poor are overcome. When the liquid level of the liquid sulfur is changed, the liquid sulfur is adhered to the wall of the container, and acidic substances are easily generated after the liquid sulfur is oxidized to corrode the container.

Description

Technical Field

[0001] The present application relates to the field of sulfur chemical technology, and in particular to a sulfur melting device. Background Art

[0002] Sulfur, also known as sulfur, colloidal sulfur, or lump sulfur, appears as pale yellow, brittle crystals or powder with a distinctive odor. Its molecular weight is 32.06, and its melting point is 119°C. Sulfur is a crucial industrial raw material. For example, in the industrial production of chemicals like sulfuric acid and carbon disulfide, it must be melted into liquid form before use. Therefore, sulfur melting equipment is crucial for producing liquid sulfur. Existing sulfur melting methods primarily utilize a melting kettle, which uses a heat exchange jacket to heat the solid sulfur within. However, this method is slow to transfer heat and results in significant energy losses. Some factories also utilize internal heating coils for sulfur heating, which offers relatively high heat transfer efficiency. However, because this heating method utilizes internal heat exchange tubes, the liquid sulfur temperature at the inner wall of the melting vessel is relatively low. During operation, the liquid sulfur can easily adhere to the inner wall of the vessel due to fluctuations in the liquid level and solidify. These solidified sulfur solids adhere to the inner wall of the vessel and, upon oxidation, can easily produce acidic substances such as sulfuric acid, which can corrode the vessel. Utility Model Content

[0003] The present application provides a sulfur melting device to solve the problem that in existing sulfur melting devices using internal heat exchange coils, the liquid sulfur near the container wall has a low temperature during use, adheres to the container wall when the liquid sulfur level changes, and is easily oxidized to produce acidic substances that corrode the container.

[0004] The present application provides a sulfur melting device, comprising:

[0005] A molten sulfur pool, wherein at least one set of heat exchange coils is provided in the molten sulfur pool, and an input pipe and an output pipe of the heat exchange coils are provided through a side wall of the molten sulfur pool;

[0006] A stirring device is arranged in the space surrounded by the heat exchange coil and is fixed in the molten sulfur pool by a fixing frame arranged on the molten sulfur pool;

[0007] A heat exchange jacket, which is covered on the outer periphery of the upper part of the molten sulfur pool;

[0008] The overflow trough is opened at the upper part of one side of the molten sulfur pool and passes through the heat exchange jacket.

[0009] Optionally, a plurality of sets of heat exchange coils are provided in the molten sulfur pool, and a stirring device is provided in the space enclosed by each heat exchange coil.

[0010] Optionally, the heat exchange jacket is divided by vertical partitions;

[0011] An input port is provided on one side of the heat exchange jacket close to the partition plate, and an output port is provided on the other side of the heat exchange jacket close to the partition plate.

[0012] Optionally, the stirring device includes a vertically arranged stirring rod, the top of which is connected to the power transmission structure;

[0013] The outer circumference of the stirring rod is provided with a first blade and a second blade in sequence from top to bottom, the first blade is higher than the top of the heat exchange coil, and the second blade is located in the space surrounded by the heat exchange coil;

[0014] The second blade is in the shape of a spiral ribbon, while the first blade is in the shape of a vertical rectangle;

[0015] The stirring rod is rotatably connected to the fixed frame.

[0016] Optionally, one end of the overflow trough close to the inner wall of the molten sulfur pool is also connected to a filter cover;

[0017] The top of the filter cover and the upper part of one side are hollow structures.

[0018] Optionally, the top cover of the molten sulfur pool is provided with a gas collecting cover;

[0019] The stirring device is arranged through the top of the gas collecting hood, and the gas collecting hood is provided with a feed inlet, which is covered by a matching cover plate, and the cover plate is hinged to the gas collecting hood;

[0020] An exhaust port is provided on the top of the gas collecting hood.

[0021] Optionally, the exhaust port is further connected to an air extraction pump via a condenser, and the air extraction pump is further connected to an exhaust gas treatment device.

[0022] The present application provides a sulfur melting device. By arranging a heat exchange jacket on the outer periphery of the upper part of the molten sulfur pool, sulfur adhering to the inner wall of the molten sulfur pool during the stirring process of the stirring device is heated and melted and flows into the pool, thereby reducing the occurrence of sulfur adhering to the wall and corroding the molten sulfur pool. The disadvantage of the existing sulfur melting device that the liquid sulfur near the container wall is low in temperature, adheres to the container wall when the liquid sulfur level changes, and is easily oxidized to produce acidic substances that corrode the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a sulfur melting device provided in one embodiment of the present application;

[0025] Figure 2 A schematic top view of the structure of a sulfur melting device provided in one embodiment of the present application;

[0026] Figure 3 A schematic structural diagram of a heat exchange jacket provided in one embodiment of the present application;

[0027] Figure 4 A schematic structural diagram of a stirring device provided in one embodiment of the present application;

[0028] Figure 5 A schematic diagram of the three-dimensional structure of a sulfur melting device provided in another embodiment of the present application;

[0029] Figure 6 A schematic structural diagram of a filter cover provided in one embodiment of the present application;

[0030] Figure 7 A schematic diagram of the three-dimensional structure of a sulfur melting device provided in another embodiment of the present application;

[0031] Figure 8 A schematic diagram of the three-dimensional structure of a sulfur melting device provided in another embodiment of the present application;

[0032] Figure 9 A schematic diagram of a sulfur melting device provided in yet another embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Molten sulfur pool; 2. Condenser; 3. Tail gas treatment device; 11. Heat exchange coil; 12. Stirring device; 13. Fixing frame; 14. Heat exchange jacket; 15. Overflow tank; 16. Filter cover; 17. Gas collecting hood; 21. Vacuum pump; 121. Stirring rod; 122. Power transmission structure; 141. Partition; 171. Cover plate; 1211. First paddle; 1212. Second paddle; 1701. Exhaust port. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0036] like Figure 1 and Figure 2 As shown, the present application provides a sulfur melting device, comprising:

[0037] A molten sulfur pool 1 is provided with at least one set of heat exchange coils 11, and an input pipe and an output pipe of the heat exchange coils 11 are provided through a side wall of the molten sulfur pool 1;

[0038] A stirring device 12 is provided in the space enclosed by the heat exchange coil 11. The stirring device 12 is also fixed in the molten sulfur pool 1 by a fixing frame 13 provided on the molten sulfur pool 1.

[0039] A heat exchange jacket 14 is provided, the heat exchange jacket 14 covering the outer periphery of the upper portion of the molten sulfur pool 1;

[0040] The overflow trough 15 is opened at the upper part of one side of the molten sulfur pool 1 and passes through the heat exchange jacket 14.

[0041] During use, solid sulfur blocks are added to the molten sulfur pool 1, and steam (0.6-0.75 MPa, 160-170°C) is introduced into the heat exchange coil 11 to heat the sulfur blocks. Then, the stirring device 12 is started (when heating and melting sulfur for the first time, the stirring device 12 should be started only after the sulfur in the pool is partially melted). The blades on the stirring device 12 stir the molten sulfur solution, thereby facilitating heat transfer and accelerating the melting of the sulfur. At the same time, steam is introduced into the heat exchange jacket 14 on the upper part of the molten sulfur pool 1. In this way, the sulfur adhered to the inner wall of the molten sulfur pool 1 during the stirring process of the stirring device 12 is also heated and melted and flows into the pool, thereby reducing the occurrence of sulfur sticking to the wall and corroding the molten sulfur pool 1.

[0042] The sulfur heated and melted in the molten sulfur pool 1 gradually rises as the material is continuously added. When the liquid sulfur level rises to the position of the overflow tank 15, the liquid sulfur overflows into the overflow tank 15 and then flows into the corresponding equipment of the next level, such as the filter tank, for subsequent processing.

[0043] The present application provides a sulfur melting device. By arranging a heat exchange jacket 14 on the outer periphery of the upper part of the molten sulfur pool 1, the sulfur adhering to the inner wall of the molten sulfur pool 1 during the stirring process of the stirring device 12 is heated and melted and flows into the pool, thereby reducing the occurrence of sulfur adhering to the wall and corroding the molten sulfur pool 1. This overcomes the disadvantage of the existing sulfur melting device that the liquid sulfur near the container wall is low in temperature, adheres to the container wall when the liquid sulfur level changes, and is easily oxidized to produce acidic substances that corrode the container.

[0044] like Figure 1 and Figure 2 As shown, optionally, a plurality of heat exchange coils 11 are provided in the molten sulfur pool 1 , and a stirring device 12 is provided in the space enclosed by each heat exchange coil 11 .

[0045] In the present application, multiple sets of heat exchange coils 11 are provided in the molten sulfur pool 1, and a stirring device 12 is provided in the space enclosed by each heat exchange coil 11. This arrangement can increase the number of heating devices in the molten sulfur pool 1 and thus improve the sulfur melting efficiency.

[0046] like Figure 3 As shown, optionally, the heat exchange jacket 14 is divided by a vertical partition 141;

[0047] An input port is provided on one side of the heat exchange jacket 14 close to the partition 141 , and an output port is provided on the other side of the heat exchange jacket 14 close to the partition 141 .

[0048] In this application, the interior of the heat exchange jacket 14 is divided by a vertical partition 141, effectively dividing the internal space of the heat exchange jacket 14 into an input end and an output end. Steam is input from the input end, fills the cavity within the heat exchange jacket 14, and then is output from the output end, thereby fully heating and insulating the upper portion of the molten sulfur pool 1. This arrangement also allows the input and output ends of the heat exchange jacket 14 to be located on the same side, facilitating maintenance and inspection. In actual use, a drain port can be provided at the bottom of the heat exchange jacket 14 to facilitate the discharge of moisture generated by condensation of steam during heat exchange.

[0049] like Figure 1 and Figure 4 As shown, optionally, the stirring device 12 includes a vertically arranged stirring rod 121, and the top of the stirring rod 121 is connected to the power transmission structure 122;

[0050] The outer periphery of the stirring rod 121 is provided with a first blade 1211 and a second blade 1212 in sequence from top to bottom. The first blade 1211 is higher than the top of the heat exchange coil 11, and the second blade 1212 is located in the space surrounded by the heat exchange coil 11.

[0051] The second blade 1212 is in the shape of a spiral ribbon, and the first blade 1211 is in the shape of a vertical rectangle;

[0052] The stirring rod 121 is rotatably connected to the fixing frame 13 .

[0053] In the present application, when in use, the power transmission structure 122 (such as a sprocket or a pulley) transmits the power output by the power source (such as a motor, etc.) to the stirring device 12, and the blades on the stirring device 12 stir the molten sulfur solution. The second blade 1212 is in the shape of a spiral belt, which can lift the sulfur solution upward or push the sulfur solution downward during rotation (the spiral mode of the spiral belt can be set as needed in specific use), and because the second blade 1212 is arranged in the cylindrical space surrounded by the heat exchange coil 11, when the two are used together, the heat exchange coil 11 is coiled into a cylindrical shape, While heating the sulfur, it also acts as a guide tube. When the second blade 1212 stirs the liquid sulfur, the flow directions of the liquid sulfur inside and outside the cylindrical structure wound into the heat exchange coil 11 are opposite, which can enhance the stirring effect, thereby facilitating heat transfer and accelerating the melting of the sulfur. The first blade 1211 is arranged above the top of the heat exchange coil 11, and can stir and mix the higher-temperature liquid sulfur that surges up due to the stirring of the second blade 1212 with the lower-temperature liquid sulfur in the upper layer to enhance heat transfer. The vertical rectangle has a wider stirring surface, which can improve stirring efficiency.

[0054] like Figure 5 and Figure 6 As shown, optionally, one end of the overflow trough 15 close to the inner wall of the molten sulfur pool 1 is also connected to the filter cover 16;

[0055] The top and the upper portion of one side of the filter cover 16 are hollow structures.

[0056] In the present application, the sulfur heated and melted in the molten sulfur pool 1 gradually increases with the continuous addition of material. When the liquid sulfur level rises to the hollow position of the filter cover 16, the liquid sulfur will overflow into the overflow tank 15 and flow into the corresponding equipment of the next level, such as the filter tank. Due to the hollow structure of the filter cover 16 (equivalent to the filter net), the infusible solid impurities in the liquid sulfur can be filtered and retained to improve the cleanliness of the outflowing liquid sulfur.

[0057] like Figure 7 and Figure 8 As shown, optionally, the top cover of the molten sulfur pool 1 is provided with a gas collecting cover 17;

[0058] The stirring device 12 is provided through the top of the gas collecting hood 17. The gas collecting hood 17 is provided with a feed inlet, which is covered by a matching cover plate 171. The cover plate 171 is hinged to the gas collecting hood 17.

[0059] An exhaust port 1701 is provided on the top of the air collecting hood 17 .

[0060] In the present application, during the heating and melting process of sulfur, the moisture and other substances therein will evaporate during the melting process of the sulfur, forming tail gas. If the tail gas is not treated and enters the air, it will cause the working environment to deteriorate and pollute the atmosphere. Therefore, a gas collecting hood 17 is provided to collect the gas evaporated during the sulfur heating process for centralized treatment.

[0061] like Figure 9 As shown, optionally, the exhaust port 1701 is further connected to the air extraction pump 21 through the condenser 2 , and the air extraction pump 21 is further connected to the exhaust gas treatment device 3 .

[0062] In this application, the exhaust gas collected by the gas collecting hood 17 is extracted from the exhaust port 1701 by the exhaust pump 21. Since the extracted gas temperature is relatively high, it needs to be cooled by the condenser 2 and then discharged into the exhaust gas treatment device 3 (such as a washing tower, etc.) for treatment.

[0063] A sulfur melting device, the working process of which is as follows:

[0064] During use, the gas collecting hood 17 is installed above the molten sulfur pool 1, the cover 171 on the gas collecting hood 17 is opened, and the solid sulfur block is added into the molten sulfur pool 1. At the same time, steam (0.6-0.75MPa, 160-170°C) is introduced into the heat exchange coil 11 to heat the sulfur block. Then, the stirring device 12 is started (when heating the molten sulfur for the first time, it should be started after the sulfur in the pool is partially melted). The power transmission structure 122 (such as a sprocket or a pulley) transmits the power output by the power source (such as a motor, etc.) to the stirring device 12. The blades on the stirring device 12 stir the molten sulfur solution. The second blade 1212 is a spiral belt and can lift the sulfur solution upward or push the sulfur solution downward during the rotation process. The heat exchange coil 11 is provided with a spiral structure (a spiral pattern of a spiral belt can be provided as required in specific use), and since the second blade 1212 is provided in the space enclosed by the heat exchange coil 11, when the two are used in combination, the heat exchange coil 11 is coiled into a cylindrical shape, which not only heats the sulfur but also serves as a guide tube. When the second blade 1212 stirs the liquid sulfur, the liquid sulfur inside and outside the cylindrical structure formed by the heat exchange coil 11 flows in opposite directions, which can enhance the stirring effect, thereby facilitating heat transfer and accelerating the melting of the sulfur. The first blade 1211 is provided at a position above the top of the heat exchange coil 11, and can stir and mix the higher-temperature liquid sulfur that surges up due to the stirring of the second blade 1212 with the lower-temperature liquid sulfur in the upper layer, thereby enhancing heat transfer. At the same time, steam is introduced into the heat exchange jacket 14 on the upper part of the molten sulfur pool 1, so that the sulfur adhering to the inner wall of the molten sulfur pool 1 during the stirring process of the stirring device 12 can also be heated and melted and flow into the pool, thereby reducing the occurrence of sulfur adhering to the wall and corroding the molten sulfur pool 1.

[0065] The sulfur being heated and melted in the molten sulfur pool 1 gradually rises in level as the material is continuously added. When the level of the liquid sulfur rises to the hollow position of the filter cover 16, the liquid sulfur overflows into the overflow tank 15 and then flows into the corresponding equipment of the next level, such as the filter tank. Due to the hollow structure of the filter cover 16, solid impurities in the liquid sulfur can be filtered and retained, thereby improving the cleanliness of the outflowing liquid sulfur.

[0066] During the heating and melting process of sulfur, the moisture and other substances in the sulfur will evaporate to form tail gas. If the tail gas is not treated and enters the air, it will cause the working environment to deteriorate and pollute the atmosphere. Therefore, a gas collecting hood 17 is provided to collect the gas evaporated during the heating process of sulfur, and the gas is extracted from the exhaust port 1701 by the exhaust pump 21. The extracted gas has a high temperature and is then cooled by the condenser 2 and discharged into the tail gas treatment device 3 (such as a washing tower) for treatment.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sulfur melting device, characterized in that: include: A molten sulfur pool (1), wherein at least one set of heat exchange coils (11) is provided in the molten sulfur pool (1), and an input pipe and an output pipe of the heat exchange coils (11) are provided through a side wall of the molten sulfur pool (1); a stirring device (12), the stirring device (12) being arranged in a space enclosed by the heat exchange coil (11), and the stirring device (12) being fixed in the molten sulfur pool (1) via a fixing frame (13) arranged on the molten sulfur pool (1); a heat exchange jacket (14), the heat exchange jacket (14) covering the outer periphery of the upper portion of the molten sulfur pool (1); An overflow trough (15) is provided at the upper portion of one side of the molten sulfur pool (1) and passes through the heat exchange jacket (14).

2. The sulfur melting device according to claim 1, characterized in that: A plurality of heat exchange coils (11) are arranged in the molten sulfur pool (1), and a stirring device (12) is arranged in the space enclosed by each heat exchange coil (11).

3. The sulfur melting device according to claim 1, characterized in that: The heat exchange jacket (14) is divided by a vertically arranged partition (141); An input port is provided on one side of the heat exchange jacket (14) close to the partition (141), and an output port is provided on the other side close to the partition (141).

4. The sulfur melting device according to claim 1, characterized in that: The stirring device (12) comprises a vertically arranged stirring rod (121), the top of the stirring rod (121) being connected to a power transmission structure (122); The outer circumference of the stirring rod (121) is provided with a first blade (1211) and a second blade (1212) in sequence from top to bottom, the first blade (1211) is higher than the top of the heat exchange coil (11), and the second blade (1212) is located in the space enclosed by the heat exchange coil (11); The second blade (1212) is in the shape of a spiral ribbon, and the first blade (1211) is in the shape of a vertical rectangle; The stirring rod (121) is rotatably connected to the fixing frame (13).

5. The sulfur melting device according to claim 1, characterized in that: One end of the overflow trough (15) close to the inner wall of the molten sulfur pool (1) is also connected to the filter cover (16); The top and the upper portion of one side of the filter cover (16) are hollow structures.

6. The sulfur melting device according to any one of claims 1 to 5, characterized in that: The top cover of the molten sulfur pool (1) is provided with a gas collecting cover (17); The stirring device (12) is arranged through the top of the gas collecting hood (17), and the gas collecting hood (17) is provided with an inlet, which is covered by a matching cover plate (171), and the cover plate (171) is hinged to the gas collecting hood (17); An exhaust port (1701) is provided on the top of the gas collecting hood (17).

7. The sulfur melting device according to claim 6, characterized in that: The exhaust port (1701) is also connected to a vacuum pump (21) via a condenser (2), and the vacuum pump (21) is also connected to an exhaust gas treatment device (3).

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