Novel sulfur melting device with negative pressure sulfur melting function
By adjusting the negative pressure index of the screw vacuum machine, the vaporization rate of moisture and light oil components in the sulfur paste is changed, and the melting temperature of sulfur is reduced. This solves the problems of high energy consumption and difficult equipment modification in traditional sulfur melting kettles, and achieves energy saving, consumption reduction and high-purity sulfur production.
Patent Information
- Application Number
- CN202520216012.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Traditional sulfur melting kettles require operation under pressure, resulting in high energy consumption, significant challenges in equipment modification, low automation, environmental pollution during sulfur removal, and inconsistent purity. Furthermore, the co-melting of oil, water, and sulfur makes sulfur melting and removal difficult.
By adjusting the negative pressure index using a screw vacuum press, the vaporization rate of moisture and light oil components in the sulfur paste is changed, thereby reducing the melting temperature of sulfur. The negative pressure sulfur melting device achieves the goal of saving heating steam.
Energy consumption has been reduced, and the sulfur melting device is easy to operate. During the sulfur melting process, the sulfur melting device is easy to operate, the purity of sulfur is improved, equipment modification investment is reduced, and operation is simplified.
Smart Images
Figure CN223641803U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sulfur melting devices, and in particular to a novel sulfur melting device with negative pressure sulfur melting function. Background Technology
[0002] With the technological advancements in the national chemical industry, by-product coal gas generated in sectors such as coking, semi-coke, and metallurgy is gradually being industrially converted and utilized. Before conversion and utilization, hydrogen sulfide must be removed from the coal gas; otherwise, hydrogen sulfide and other sulfides in the gas will cause a series of problems, including equipment corrosion, catalyst poisoning, and excessive sulfide levels in flue gas emissions. Among numerous desulfurization technologies, wet oxidation desulfurization technology dominates the industry due to its economic and environmental advantages. The reason wet oxidation is economical and environmentally friendly is that it converts sulfides into elemental sulfur during desulfurization and processes it into solid industrial sulfur as a by-product, thus increasing economic benefits.
[0003] Traditional sulfur melting technology mostly involves heating crude solid industrial sulfur with steam in an intermittent or continuous sulfur melting kettle. This traditional sulfur melting kettle needs to be operated under pressure, and the sulfur paste needs to contain a certain amount of water to facilitate heat conduction, resulting in high energy consumption. If the sulfur paste contains a large variety of oil-like impurities, the purity of the crude product obtained after sulfur melting cannot be guaranteed. In severe cases, the phenomenon of oil, water, and sulfur co-melting will occur, making it difficult to remove sulfur after sulfur melting or even impossible to remove liquid sulfur.
[0004] For companies undergoing later-stage renovations, using traditional sulfur melting kettles for sulfur melting operations requires not only adding floors to the plant but also upgrading the filtration equipment. This results in high engineering difficulty and costs. Furthermore, the inspection routes are long, the operation is difficult, and the level of automation is low.
[0005] Traditional sulfur melting kettle processes require venting after sulfur removal, resulting in the discharge of large amounts of residue, organic gases, and waste liquid, which seriously pollutes the environment.
[0006] Therefore, those skilled in the art have provided a novel sulfur melting device with negative pressure sulfur melting function to solve the problems mentioned in the background art. Utility Model Content
[0007] This invention provides a novel sulfur melting device with negative pressure melting function, which changes the negative pressure index in the sulfur melting heating chamber by adjusting the screw vacuum machine, thereby altering the vaporization rate of moisture and light oil components in the sulfur paste and appropriately reducing the melting temperature of sulfur, thus achieving the purpose of saving heating steam.
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] This utility model discloses a novel sulfur melting device with negative pressure sulfur melting function, the device comprising:
[0010] A sulfur melting heating chamber has a first cavity in its chamber wall, a sulfur melting drive shaft is installed inside the sulfur melting heating chamber, the sulfur melting drive shaft has a second cavity, multiple sulfur melting conveying blades are installed on the sulfur melting drive shaft, and the multiple sulfur melting conveying blades have a third cavity, the third cavity being connected to the second cavity;
[0011] A driving device, wherein the driving end of the driving device is connected to one end of the molten sulfur drive shaft, and the other end of the molten sulfur drive shaft is connected to a heat source, and the heat source is in communication with the second cavity;
[0012] A feeding device, wherein the discharge end of the feeding device is connected to the top of the molten sulfur heating chamber and the end near the drive device;
[0013] The discharge device has its inlet end connected to the bottom of the molten sulfur heating chamber and the end away from the drive device.
[0014] A screw vacuum machine, wherein the suction end of the screw vacuum machine is connected to the top of the molten sulfur heating chamber via a pipeline.
[0015] Furthermore, the feeding device includes a conveying auger, the feed end of which is connected to the sulfur paste hopper, and the discharge end of which is connected to the feed end of the molten sulfur heating chamber through a conveying pipe, wherein a star-shaped unloader is installed in the conveying pipe.
[0016] Furthermore, both ends of the sulfur melting drive shaft extend out of the sulfur melting heating chamber, and a high-temperature resistant sealing ring is provided at the connection between the sulfur melting drive shaft and the sulfur melting heating chamber.
[0017] Furthermore, the driving device includes a sulfur melting motor, the output end of which is connected to the sulfur melting transmission shaft via a sulfur melting reducer.
[0018] Furthermore, the two ends of the sulfur melting drive shaft extending from the sulfur melting heating chamber are respectively mounted on the transmission frame.
[0019] Furthermore, the discharge device includes a liquid flow storage tank, the inlet of which is connected to the outlet of the molten sulfur heating chamber via a jacketed heat tracing pipe.
[0020] Furthermore, the jacketed heat tracing pipe is equipped with a liquid sulfur detection port.
[0021] In the above technical solution, the novel sulfur melting device with negative pressure sulfur melting function provided by this utility model has the following beneficial effects:
[0022] 1. This application achieves the sulfur melting process of sulfur paste by adjusting the temperature inside the cavity of the sulfur melting heating silo, the second cavity of the internal sulfur melting drive shaft, and the third cavity of the sulfur melting conveying blades, adjusting the amount of sulfur paste fed into the conveying auger, adjusting the screw vacuum negative pressure, and adjusting the speed of the sulfur melting reducer.
[0023] 2. This application changes the negative pressure index in the sulfur melting heating chamber by adjusting the screw vacuum machine, which can change the vaporization rate of water and light oil components in the sulfur paste and appropriately reduce the melting temperature of sulfur, thereby saving heating steam.
[0024] 3. This application has strong applicability and can meet the needs of different wet desulfurization industries. In particular, it has more obvious advantages for the semi-coke industry where sulfur paste contains more light oil impurities.
[0025] 4. For enterprises undergoing transformation, this application can save on civil engineering and equipment investment. After transformation, the operation is convenient and the inspection route is short. In particular, during the sulfur melting process, the four process indicators are perfectly coordinated, there are many adjustment methods, and the equipment operation is highly flexible. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0027] Figure 1 A schematic diagram of the structure of a novel sulfur melting device with negative pressure sulfur melting function provided for an embodiment of this utility model;
[0028] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;
[0029] Figure 3 for Figure 1 Front view of the medium screw vacuum machine.
[0030] Explanation of reference numerals in the attached figures:
[0031] 10. Sulfur melting heating chamber; 11. Sulfur drive shaft; 12. Sulfur melting conveyor blades; 13. First cavity; 14. Second cavity; 15. Third cavity; 16. High-temperature resistant sealing ring;
[0032] 20. Drive unit; 21. Sulfur melting motor; 22. Sulfur melting reducer;
[0033] 30. Feeding device; 31. Conveying auger; 32. Sulfur paste hopper; 33. Conveying pipeline; 34. Rotary rotary valve;
[0034] 40. Discharge device; 41. Liquid flow storage tank; 42. Jacketed heat tracing pipe; 43. Liquid sulfur detection port;
[0035] 50. Screw vacuum machine;
[0036] 60. Transmission frame. Detailed Implementation
[0037] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0038] See Figure 1-3 As shown;
[0039] The present invention provides a novel sulfur melting device with negative pressure sulfur melting function, comprising:
[0040] The sulfur melting heating chamber 10 has a first cavity 13 inside its wall, a sulfur melting drive shaft 11 inside the chamber, a second cavity 14 inside the sulfur melting drive shaft 11, a plurality of sulfur melting conveying blades 12 on the sulfur melting drive shaft 11, and a third cavity 15 inside the plurality of sulfur melting conveying blades 12, which are connected to the second cavity 14.
[0041] The driving device 20 is connected to one end of the molten sulfur transmission shaft 11, and the other end of the molten sulfur transmission shaft 11 is connected to a heat source, which is connected to the second cavity 14.
[0042] The feeding device 30 has its discharge end connected to the top of the molten sulfur heating chamber 10 and the end near the drive device 20.
[0043] The discharge device 40 is connected at its feed end to the bottom of the molten sulfur heating chamber 10 and at the end away from the drive device 20.
[0044] The screw vacuum machine 50 has its extraction end connected to the top of the molten sulfur heating chamber 10 via a pipeline.
[0045] In specific operation, the sulfur paste conveyed by the feeding device 30 to the molten sulfur heating chamber 10 is heated by the spiral structure of the molten sulfur conveying blades 12 and pushed towards the discharge end (near the end of the discharge device 40). During this process, the sulfur paste is heated by the steam in the first cavity 13 formed by the jacket structure of the outer shell of the molten sulfur heating chamber 10, the second cavity 14 formed by the jacket of the internal molten sulfur drive shaft 11, and the third cavity 15 formed by the jacket structure of the molten sulfur conveying blades 12. The water and light oil components present in the sulfur paste are heated and vaporized at the front end of the molten sulfur heating chamber 10 (near the end of the feeding device), and become gaseous components that are drawn away by the screw vacuum machine 50 and transported to the recycling process.
[0046] As the sulfur paste is heated in the sulfur melting heating chamber 10 and pushed towards the discharge end, the temperature of the remaining sulfur paste gradually increases as the moisture and light oil components in the sulfur paste are continuously vaporized until they reach the melting temperature of the sulfur in the sulfur paste. In this way, the remaining sulfur paste in the sulfur melting heating chamber 10 is gradually melted into liquid and continues to be pushed to the tail end by the sulfur melting conveying blades 12 inside the sulfur melting heating chamber 10.
[0047] Due to the action of the screw vacuum machine 50, the sulfur melting heating chamber 10 is in a negative pressure working state. When the sulfur paste in the sulfur melting heating chamber 10 is heated, it is pushed to the discharge end, which accelerates the vaporization rate of water and light oil components in the sulfur paste and reduces the vaporization temperature of water and light oil substances, greatly reducing energy consumption.
[0048] Furthermore, the feeding device 30 includes a conveying auger 31, the feed end of which is connected to the sulfur paste hopper 32, and the discharge end of which is connected to the feed end of the molten sulfur heating chamber 10 through a conveying pipe 33. A star-shaped unloader 34 is installed inside the conveying pipe 33.
[0049] The sulfur paste produced in the sulfur recovery section is periodically added to the sulfur paste hopper 32 by a loader. The sulfur paste is continuously and evenly fed into the sulfur melting heating chamber 10 by the conveying auger 31. The steam in the first cavity 13 formed by the jacket structure of the outer shell of the sulfur melting heating chamber 10, the second cavity 14 formed by the jacket of the internal sulfur melting drive shaft 11, and the third cavity 5 formed by the jacket structure of the sulfur melting conveying blades 12 can be used to introduce heating steam into the sulfur melting heating chamber 10. The temperature can be adjusted by the amount of steam added.
[0050] In order to maintain the negative pressure working state of the sulfur melting heating chamber 10, a star-shaped unloader 34 is added to the conveying pipeline 33. The star-shaped unloader 34 not only ensures that the material from the conveying auger 31 enters the sulfur melting heating chamber 10, but also isolates the sulfur melting heating chamber 10 from the atmosphere, preventing air from the atmosphere from entering the sulfur melting heating chamber through the conveying auger 31.
[0051] Furthermore, both ends of the sulfur melting drive shaft 11 extend out of the sulfur melting heating chamber 10, and a high-temperature resistant sealing ring 16 is provided at the connection between the sulfur melting drive shaft 11 and the sulfur melting heating chamber 10.
[0052] The high-temperature resistant sealing ring 16 has a double sealing structure. The internal mechanical seal can meet the high-temperature sealing conditions and adapt to the sealing requirements under high-temperature conditions. The external mechanical seal can reduce the load on the internal mechanical seal. The double mechanical seal effectively ensures the working environment inside the sulfur melting heating chamber 10.
[0053] Furthermore, the drive device 20 includes a sulfur melting motor 21, the output end of which is connected to the sulfur melting transmission shaft 11 via a sulfur melting reducer 22.
[0054] By adjusting the rotation speed of the conveying auger 31 to approximately 23 r / min, the rotation speed of the star-shaped unloader 34 to 50 r / min, the internal temperature of the sulfur melting heating chamber 10 is maintained at 160±10℃, the output speed of the sulfur melting reducer 21 is maintained at 15 r / min, and the vacuum degree of the screw vacuum press 50 is maintained at 15±1 kPa. Under the above process conditions, the sulfur paste is continuously pushed to the discharge end by the sulfur melting conveying blades 12 in the sulfur melting heating chamber 10. The sulfur melting heating chamber 10 has a diameter of Φ1200 mm and a length of 6000 mm for the sulfur melting drive shaft 11. The total time required for the sulfur paste to go from entering the sulfur melting heating chamber 10 to the discharge end is approximately 25 minutes. During this process, the vaporization and separation of water and light oil components in the sulfur paste, as well as the melting of sulfur, are completed.
[0055] Furthermore, the two ends of the sulfur melting drive shaft 11 extending out of the sulfur melting heating chamber 10 are respectively mounted on the transmission frame 60.
[0056] The transmission frame 60 effectively reduces vibration between the sulfur melting reducer 22 and the sulfur melting heating chamber 10, making their operation smoother and contributing to the long-term stable operation of the equipment. The transmission frame 60 is manufactured by Daoqi (Shanghai) Transmission Machinery Co., Ltd., and the equipment model is SP4B-ExL-7510E-RE( / R).
[0057] Furthermore, the discharge device 40 includes a liquid flow storage tank 41, the inlet of which is connected to the outlet of the molten sulfur heating chamber 10 via a jacketed heat tracing pipe 42.
[0058] Furthermore, the jacketed heat tracing pipe 42 is provided with a liquid sulfur detection port 43.
[0059] By periodically or irregularly sampling at the liquid sulfur detection port 43, the internal temperature, negative pressure index, material pushing speed, and sulfur paste material matching of the molten sulfur heating chamber 10 are observed to see if they are in optimal working condition. If unmelted material is found in the liquid sulfur when sampling at the liquid sulfur detection port 43, the speed of the molten sulfur reducer 22 can be adjusted by adjusting the frequency of the inverter of the molten sulfur motor 21, thereby adjusting the speed of the molten sulfur drive shaft 11 and the molten sulfur conveying blades 12, thus changing the pushing speed of the sulfur paste to the discharge end in the molten sulfur heating chamber 0 and extending the heating time of the sulfur paste.
[0060] If unmelted material is observed in the liquid sulfur at the sampling point 43 of the liquid sulfur detection port, the amount of steam in the first cavity 13 formed by the jacket structure of the outer shell of the molten sulfur heating chamber 10, the second cavity 14 formed by the jacket of the internal molten sulfur drive shaft 11, and the third cavity 15 formed by the jacket structure of the molten sulfur conveying blade 12 can be increased. This will increase the temperature of these parts, shorten the vaporization time of water and light oil components in the sulfur paste, and increase the speed of sulfur melting.
[0061] Liquid sulfur enters the liquid sulfur storage tank 41. The inner tube of the jacketed heat tracing pipe 42 is DN50 and the outer tube is DN80. The automatic sulfur discharge valve on it is a jacketed heat tracing switch valve. The jacketed heat tracing pipe 42 maintains the internal temperature between 135±5℃ through heat tracing steam. The liquid sulfur in the molten sulfur heating chamber 10 flows into the liquid sulfur storage tank 41 by gravity using the elevation difference. Since there is a negative pressure condition in the liquid sulfur storage tank 41, the elevation difference height is set to 3.5 meters.
[0062] The liquid sulfur detection port 43 is located in the middle of the jacketed heat tracing pipe 42. The pipe of the liquid sulfur detection port 43 is a jacketed pipe with an outer pipe of DN50 and an inner pipe of DN32. The valve is a jacketed heat tracing ball valve. The temperature inside the pipe is maintained at 135±5℃ by heat tracing steam, which will not cause pipe blockage.
[0063] The liquid sulfur storage tank 41 is a jacketed heating structure with an internal diameter of Φ1400mm and a height of 1500mm. The top of the liquid sulfur storage tank 41 is equipped with a vent pipe, and the end of the vent pipe is equipped with a breather valve to communicate with the atmosphere, which allows the liquid level in the liquid sulfur storage tank to change freely. The liquid sulfur storage tank 41 is equipped with a jacketed heating type flap level gauge to facilitate real-time monitoring of the liquid level changes in the storage tank.
[0064] The molten liquid sulfur and residual oil in the sulfur melting heating chamber 10 are stored in the liquid sulfur storage tank 41 through the jacketed heat tracing pipe 42 and the jacketed heat tracing sulfur discharge valve. Two liquid sulfur storage tanks 41 can be set up, with one in use and one in standby mode. After the liquid sulfur and residual oil in the liquid sulfur storage tank 41 are left to stand still for 4-6 hours, they will separate due to the density difference. The liquid sulfur and trace amounts of oil with a density greater than that of liquid sulfur will settle at the bottom of the liquid sulfur storage tank 41, while the oil with a density less than that of liquid sulfur will float at the top of the liquid sulfur storage tank.
[0065] The liquid sulfur at the bottom of the liquid sulfur storage tank 41 is intermittently discharged into a cooling tank. After cooling and solidification, solid crude industrial sulfur is obtained. Alternatively, the liquid sulfur at the bottom of the liquid sulfur storage tank 41 can be transported to an evaporator using a submersible pump for further vaporization and purification to obtain a high-purity sulfur product.
[0066] Before shutting down the molten sulfur heating chamber 10, the feeding of the conveying screw conveyor 31 must be stopped first. After the material in the upper part of the rotary valve 34 is discharged, the rotary valve 34 is shut down. Then, after all the liquid sulfur in the molten sulfur heating chamber 10 has entered the liquid sulfur storage tank 41, when it is observed through the liquid sulfur detection port 43 that the liquid sulfur detection port is under negative pressure, the screw vacuum machine 50 is shut down. After confirming from the liquid sulfur detection port 43 that the liquid sulfur in the molten sulfur heating chamber 10 has been discharged, the heating steam is stopped, and the molten sulfur motor 21 is shut down. The startup sequence is the reverse.
[0067] When the liquid level in the liquid sulfur storage tank 41 rises to 1200 mm, the sulfur discharge pipe of the molten sulfur heating chamber 10 is switched to the standby tank. Then, the liquid sulfur storage tank 41 is kept stationary for 4-6 hours. During this process, due to the different densities of the internal media, the liquid sulfur is separated into layers by density difference. Generally, because the density of liquid sulfur is relatively large, the liquid sulfur is in the lower part of the liquid sulfur storage tank. The liquid sulfur is periodically discharged to the cooling tank through the bottom sulfur discharge valve. After cooling in the atmosphere for a period of time, crude solid industrial sulfur is obtained. In order to prevent the liquid sulfur inside the liquid sulfur storage tank from solidifying, the liquid sulfur storage tank 41 needs to be heated by steam to maintain the internal temperature within the range of 135±5℃.
[0068] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A novel sulfur melting device with negative pressure sulfur melting function, characterized in that, The device includes: A sulfur melting heating chamber (10) has a first cavity (13) in its chamber wall, a sulfur melting drive shaft (11) is provided inside the sulfur melting heating chamber, a second cavity (14) is provided inside the sulfur melting drive shaft (11), a plurality of sulfur melting conveying blades (12) are provided on the sulfur melting drive shaft (11), and a third cavity (15) is provided inside the plurality of sulfur melting conveying blades (12), and the third cavity (15) is connected to the second cavity (14); A drive device (20) is provided, the drive end of which is connected to one end of a molten sulfur drive shaft (11), and the other end of the molten sulfur drive shaft (11) is connected to a heat source, which is connected to the second cavity (14). The feeding device (30) is connected to the top of the molten sulfur heating chamber (10) and to the end near the drive device (20). The discharge device (40) is connected at its feed end to the bottom of the molten sulfur heating chamber (10) and at the end away from the drive device (20). The screw vacuum machine (50) has its extraction end connected to the top of the molten sulfur heating chamber (10) via a pipeline.
2. A novel sulfur melting device with negative pressure sulfur melting function according to claim 1, characterized in that: The feeding device (30) includes a conveying auger (31), the feed end of which is connected to the sulfur paste hopper (32), and the discharge end of which is connected to the feed end of the molten sulfur heating chamber (10) through a conveying pipe (33). A star-shaped unloader (34) is installed in the conveying pipe (33).
3. A novel sulfur melting device with negative pressure sulfur melting function according to claim 2, characterized in that: The two ends of the sulfur melting drive shaft (11) extend out of the sulfur melting heating chamber (10), and a high-temperature resistant sealing ring (16) is provided at the connection between the sulfur melting drive shaft (11) and the sulfur melting heating chamber (10).
4. A novel sulfur melting device with negative pressure sulfur melting function according to claim 2, characterized in that: The drive device (20) includes a sulfur melting motor (21), the output end of which is connected to the sulfur melting drive shaft (11) via a sulfur melting reducer (22).
5. A novel sulfur melting device with negative pressure sulfur melting function according to claim 2, characterized in that: The two ends of the sulfur melting drive shaft (11) extending out of the sulfur melting heating chamber (10) are respectively mounted on the transmission frame (60).
6. A novel sulfur melting device with negative pressure sulfur melting function according to claim 1, characterized in that: The discharge device (40) includes a liquid storage tank (41), and the inlet end of the liquid storage tank (41) is connected to the outlet end of the molten sulfur heating chamber (10) through a jacketed heat tracing pipe (42).
7. A novel sulfur melting device with negative pressure sulfur melting function according to claim 6, characterized in that: The jacketed heat tracing pipe (42) is equipped with a liquid sulfur detection port (43).