Feeding device for fused salt chlorination furnace

Abstract

The utility model relates to the field of titanium chemical industry, and discloses a feeding device for a fused salt chlorination furnace, which comprises a plurality of feeding units, a screw conveyer communicated with fluids of the feeding units and a controller, wherein each feeding unit comprises a batching bin for storing materials, a plurality of weighing bins with weighing modules, a first switching module and a second switching module; the first switching module is arranged between the batching bin and the plurality of weighing bins and is configured to enable the batching bin to be in fluid communication with the plurality of weighing bins in a switchable manner; the second switching module is arranged between the plurality of weighing bins and the screw conveyor, and is configured to enable the screw conveyor to be in switchable fluid communication with the plurality of weighing bins; wherein the controller is in communication connection with the weighing module, the first switching module and the second switching module. According to the utility model, the accuracy, the continuous stability and the uniformity of feeding in the fused salt chlorination process can be improved.

Description

Technical Field

[0001] This utility model relates to the field of titanium chemical technology, specifically to a feeding device for a molten salt chlorination furnace. Background Technology

[0002] Molten salt chlorination is a process that involves adding high-titanium slag, petroleum coke, and other materials to molten industrial salt and introducing chlorine gas to produce titanium tetrachloride flue gas, thereby preparing titanium tetrachloride. With the increasing single-furnace capacity of molten salt chlorination furnaces, the ability to continuously, stably, and safely add all raw and auxiliary materials into the furnace is crucial to the molten salt chlorination process and is also a core aspect of process safety. As the feed rate increases, conventional belt scales exhibit large measurement deviations, causing severe environmental pollution and significantly impacting the continuous and stable operation of the system and the chlorination efficiency of the titanium slag. Poor material uniformity within the chlorination furnace also leads to poor product quality.

[0003] Therefore, existing technologies still need improvement. Utility Model Content

[0004] The main objective of this invention is to provide a feeding device for a molten salt chlorination furnace, in order to solve the problem of how to improve the stability, accuracy and uniformity of feeding in the molten salt chlorination process.

[0005] According to one aspect of the present invention, a feeding device for a molten salt chlorination furnace is provided. The feeding device includes multiple feeding units, a screw conveyor fluidly connected to the multiple feeding units, and a controller. Each feeding unit includes a batching bin for storing materials, multiple weighing bins having a weighing module, a first switching module, and a second switching module. The first switching module is disposed between the batching bin and the multiple weighing bins and is configured to switchably fluidly connect the batching bin and the multiple weighing bins. The second switching module is disposed between the multiple weighing bins and the screw conveyor and is configured to switchably fluidly connect the screw conveyor and the multiple weighing bins. The controller is communicatively connected to the weighing module, the first switching module, and the second switching module.

[0006] According to one embodiment of the present invention, the first switching module includes a multi-channel valve, and the second switching module includes multiple constant-speed conveyors respectively disposed downstream of multiple weighing silos.

[0007] According to one embodiment of the present invention, the feeding unit further includes a frequency converter conveyor disposed between the batching bin and multiple weighing bins and connected in communication with the controller.

[0008] According to one embodiment of the present invention, the feeding unit further includes an electric valve disposed between the batching bin and multiple weighing bins, and a manual valve disposed between the batching bin and the electric valve.

[0009] According to one embodiment of the present invention, the feeding unit further includes: a raw material storage silo for storing materials; a conveying pipeline connecting the raw material storage silo and the batching silo; a conveying pump disposed on the conveying pipeline and configured to drive materials from the raw material storage silo to the batching silo; and one or more valves disposed on the conveying pipeline.

[0010] According to one embodiment of the present invention, the conveying pump is a silo pump, and one or more valves include: a conveying valve disposed downstream of the raw material storage silo, a feed valve disposed upstream of the silo pump, and a discharge valve disposed downstream of the silo pump.

[0011] According to one embodiment of the present invention, the conveying pipeline includes a plurality of straight pipes and a bending member detachably connected between two adjacent straight pipes.

[0012] According to one embodiment of the present invention, the feeding device further includes a backup screw conveyor, and each feeding unit is in fluid communication with the screw conveyor and the backup screw conveyor in a switchable manner.

[0013] According to one embodiment of the present invention, the feeding device further includes: a mixing bin configured to receive and mix materials from the screw conveyor; a feeder configured to transport the materials in the mixing bin to the molten salt chlorination furnace; and a feeding valve disposed between the mixing bin and the feeder.

[0014] According to one embodiment of the present invention, the feeding device further includes a backup feeder, and the mixing bin is fluidly connected to the feeder and the backup feeder in a switchable manner.

[0015] In the technical solution of this utility model, the screw conveyor can mix and convey various materials from multiple feeding units to ensure material uniformity. Furthermore, the controller can control the first and second switching modules based on the weighing value of the weighing module in the weighing hopper. This allows the system to switch to supplying material to the other weighing hopper when the material in one weighing hopper reaches a predetermined amount, and then discharge material from the weighing hopper that has completed feeding. Similarly, when one weighing hopper has finished discharging material, the system switches to discharging material from the other weighing hopper. This allows for the alternating conveying of accurately measured material from the weighing hoppers to the screw conveyor, ensuring accurate feeding according to the predetermined ratio. Simultaneously, it enables the continuous and stable feeding of material by allowing material to be fed into one weighing hopper while material is discharged from another. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation examples of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a feeding device for a molten salt chlorination furnace according to an embodiment of this application is shown.

[0018] Explanation of reference numerals in the attached figures:

[0019] 10. Feeding unit; 12. Batching bin; 121. Electric valve; 122. First weighing sensor; 123. Variable frequency conveyor; 124. First dust collector; 125. Manual valve; 14. Weighing bin; 141. Constant speed conveyor; 16. Raw material storage bin; 161. Conveying valve; 162. Second dust collector; 17. Conveying pump; 171. Feed valve; 173. Discharge valve; 18. Conveying pipeline; 182. Straight pipe; 184. Turning component; 20. Screw conveyor; 22. Backup screw conveyor; 30. Mixing bin; 31. Feeding valve; 33. Backup feeding valve; 32. Second weighing sensor; 40. Feeder; 42. Backup feeder; 100. Feeding device; 200. Molten salt chlorination furnace. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to specific examples and accompanying drawings.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Figure 1 A schematic diagram of a feeding device 100 for a molten salt chlorination furnace 200 according to an embodiment of this application is shown. Figure 1 As shown, the feeding device 100 includes multiple feeding units 10, a screw conveyor 20 in fluid communication with the multiple feeding units 10, and a controller. The multiple feeding units 10 can be used to provide different materials. For example, the feeding device 100 may include three feeding units 10, which are used to provide titanium slag, petroleum coke, and industrial salt, respectively. Figure 1 The structure of the feeding unit 10 for providing material 1 is shown only schematically. The structures of other feeding units for providing material 2 and material 3 can be referred to the feeding unit 10 for providing material 1.

[0023] Each feeding unit 10 may include a batching bin 12 for storing materials, a plurality of weighing bins 14 having a weighing module, a first switching module, and a second switching module. The first switching module is disposed between the batching bin 12 and the plurality of weighing bins 14 and is configured to switchably fluidly communicate between the batching bin 12 and the plurality of weighing bins 14. The second switching module is disposed between the plurality of weighing bins 14 and a screw conveyor 20 and is configured to switchably fluidly communicate between the screw conveyor 20 and the plurality of weighing bins 14. A controller is communicatively connected to the weighing module, the first switching module, and the second switching module. In one specific embodiment, each feeding unit 10 may include two weighing bins 14.

[0024] In this embodiment of the invention, the screw conveyor 20 can mix and convey various materials from multiple feeding units 10 to ensure material uniformity. Furthermore, the controller can control the first and second switching modules based on the weighing value of the weighing module in the weighing hopper 14. This allows the system to switch to supplying material to another weighing hopper 14 when the material in one weighing hopper 14 reaches a predetermined amount, and then discharge material from the weighing hopper 14 after feeding. Similarly, when one weighing hopper 14 has finished discharging material, the system switches to discharging material from the other weighing hopper 14. This allows for the alternating conveying of accurately measured material from the weighing hoppers 14 to the screw conveyor 20, ensuring accurate feeding according to the predetermined ratio. Simultaneously, it enables the feeding of one weighing hopper 14 while the other weighing hopper 14 discharges material (and the feeding and discharging times can be set to be the same), ensuring continuous and stable feeding.

[0025] In some embodiments, the first switching module includes a multi-channel valve (e.g., a three-way valve), and the second switching module includes multiple constant-speed conveyors 141 respectively disposed downstream of multiple weighing hoppers 14. The controller can control the multi-channel valve to selectively connect the batching hopper 12 and a specific weighing hopper 14, thereby feeding material into the corresponding weighing hopper 14. The controller can control a specific constant-speed conveyor 141 to open and control the other constant-speed conveyors 141 to close, thereby discharging material from the corresponding weighing hopper 14. The constant-speed conveyors 141 transport material to the screw conveyor 20 at a constant speed, ensuring feeding stability.

[0026] In some embodiments, the feeding unit 10 further includes a variable frequency conveyor 123 disposed between the batching bin 12 and a plurality of weighing bins 14 and communicatively connected to the controller. The controller can control the variable frequency conveyor 123 to adjust the conveying speed based on the weighing value of the weighing module, for example, reducing the conveying speed as the weighing value approaches the target value, thereby further improving the feeding accuracy.

[0027] In some embodiments, the feeding unit 10 further includes an electric valve 121 (e.g., an electric slide gate valve) disposed between the batching hopper 12 and the plurality of weighing hoppers 14, and a manual valve 125 (e.g., a manual slide gate valve) disposed between the batching hopper 12 and the electric valve 121. During normal production, the electric valve 121 and the manual valve 125 can remain open. When a malfunction occurs and it is necessary to stop feeding material downstream, the controller can control the electric valve 121 to close. Furthermore, when the electric valve 121 malfunctions and requires maintenance, the manual valve 125 can be switched to the closed state.

[0028] refer to Figure 1 In some embodiments, the feeding unit 10 further includes: a raw material storage silo 16 for storing materials; a conveying pipeline 18 connecting the raw material storage silo 16 and the batching silo 12; a conveying pump 17 disposed on the conveying pipeline 18 and configured to drive materials from the raw material storage silo 16 to the batching silo 12; and one or more valves disposed on the conveying pipeline. By further configuring the raw material storage silo 16, on the one hand, long-distance material conveying can be achieved, as the raw material storage silo 16 can be located far from the batching silo 12; on the other hand, using multiple silos to store materials can provide better buffering to cope with fluctuations in the production process, further improving the continuous and stable feeding. In a specific embodiment, solid powdery materials such as titanium slag, petroleum coke, and industrial salt are transported by tanker trucks to the raw material storage silos 16 of each material for storage, and then conveyed by the conveying pump 17 to the batching silo 12 in a production workshop at a distance.

[0029] In some embodiments, the conveying pump 17 is a silo pump, and one or more valves include: a conveying valve 161 (e.g., a manual gate valve) located downstream of the raw material storage silo 16, a feed valve 171 located upstream of the silo pump, and a discharge valve 173 located downstream of the silo pump. Using a silo pump simplifies the structure, saves space, improves conveying stability, and reduces environmental pollution.

[0030] In some embodiments, the conveying pipe 18 includes a plurality of straight pipes 182 and a bend member 184 detachably connected between two adjacent straight pipes 182. The bends in the conveying pipe 18 are designed with a detachable structure for easy maintenance and replacement. To prevent material wear on components, in some embodiments of this application, components in contact with materials are made of Q355 material, the wall thickness of the conveying pipe 18 is ≥14mm, and the bends are reinforced.

[0031] In some embodiments, a first dust collector 124 is provided on the top of the batching silo 12, and a second dust collector 162 is provided on the top of the raw material storage silo 16. The dust generated during the feeding process is collected by the first dust collector 124 and the second dust collector 162 and returned to the batching silo 12 and the raw material storage silo 16, thereby reducing environmental pollution.

[0032] In some embodiments, the feeding device 100 further includes a backup screw conveyor 22, and each feeding unit 10 is in fluid communication with the screw conveyor 20 and the backup screw conveyor 22 in a switchable manner. By setting up a backup screw conveyor 22, it is ensured that the screw conveyor 20, which has a long unblocking time, can be replaced in time after failure, thereby ensuring the continuous stability of feeding and effectively avoiding system shutdown caused by equipment failure and material blockage.

[0033] refer to Figure 1 In some embodiments, the feeding device 100 further includes: a mixing bin 30 configured to receive and mix materials from the screw conveyor 20; a feeder 40 configured to convey the materials in the mixing bin 30 to the molten salt chlorination furnace 200; and a feeding valve 31 (e.g., a manual slide gate valve) disposed between the mixing bin 30 and the feeder 40. The three materials configured in proportion in this application are initially mixed at the screw conveyor 20 and then secondary mixed at the mixing bin 30, which improves material uniformity and prevents stratification of the materials entering the molten salt chlorination furnace 200. The secondary-mixed material is added to the molten salt chlorination furnace 200 by the feeder 40, reacts with chlorine gas at a certain temperature to produce titanium tetrachloride gas, and after the solids in the mixed gas are collected in the dust collection chamber, it enters the subsequent rinsing system. A material seal can be formed at the bottom of the mixing bin 30 to effectively prevent the reaction gas from escaping and corroding other equipment. Throughout the entire production process, the molten salt chlorination furnace 200 is always kept in a highly efficient seal with the mixing hopper 30, ensuring smooth and stable feeding of raw materials into the furnace, and effectively preventing gas leakage from the molten salt chlorination furnace 200.

[0034] In some embodiments, the feeding device 100 further includes a backup feeder 42, and the mixing hopper 30 is fluidly connected to both the feeder 40 and the backup feeder 42 in a switchable manner. By providing the backup feeder 42, it is ensured that the feeder 42, which has a long unblocking time, can be replaced in a timely manner if it is damaged, thereby ensuring the continuous stability of feeding and effectively avoiding system shutdown due to equipment failure and material blockage. Accordingly, a backup feeding valve 33 (e.g., a manual slide gate valve) can be provided between the backup feeder 42 and the mixing hopper 30. When it is necessary to switch to using the backup feeder 42, the feeding valve 31 can be closed and the backup feeding valve 33 can be opened.

[0035] In some embodiments, the batching bin 12 is equipped with a first weighing sensor 122, and the mixing bin 30 is equipped with a second weighing sensor 32. The controller can acquire and record the detection values ​​of the first weighing sensor 122 and the second weighing sensor 32, and monitor the production process by referring to these detection values.

[0036] In summary, this utility model can be used for long-distance conveying and precise feeding of solid powdery materials such as titanium slag, petroleum coke, and industrial salt, ensuring the continuity and stability of feeding and thus guaranteeing product quality. Simultaneously, the material conveying process can be completely enclosed, resulting in minimal pollution. The overall equipment is safe, reliable, compact, and occupies a small area, and can achieve centralized automatic control of the entire system. This application offers high flexibility in processing capacity, allowing adjustment of the number or size of equipment such as the raw material storage silo 16 and the conveying pump 17 according to the chlorination furnace capacity.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the framework of the present invention, technical features of the above embodiments or different embodiments can also be combined, and many other variations of different aspects of the present invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A charging device (100) for a fused salt chlorination furnace (200), characterized in that, include: Multiple feeding units (10); A screw conveyor (20) in fluid communication with the plurality of feeding units (10); as well as Controller; Each of the feeding units (10) includes: 12, a batching bin for storing materials. Multiple weighing hoppers (14) equipped with weighing modules; A first switching module is disposed between the batching bin (12) and the plurality of weighing bins (14) and is configured to switchably fluidly connect the batching bin (12) and the plurality of weighing bins (14); The second switching module is disposed between the plurality of weighing hoppers (14) and the screw conveyor (20), and is configured to switchably fluidly connect the screw conveyor (20) and the plurality of weighing hoppers (14); The controller is communicatively connected to the weighing module, the first switching module, and the second switching module.

2. The dosing device (100) according to claim 1, characterized in that The first switching module includes a multi-channel valve, and the second switching module includes multiple constant-speed conveyors (141) respectively disposed downstream of multiple weighing silos (14).

3. The dosing device (100) according to claim 1, characterized in that The feeding unit (10) also includes a variable frequency conveyor (123) disposed between the batching bin (12) and the plurality of weighing bins (14) and communicated with the controller.

4. The dosing device (100) according to claim 1, characterized in that The feeding unit (10) further includes an electric valve (121) disposed between the batching bin (12) and the plurality of weighing bins (14), and a manual valve (125) disposed between the batching bin (12) and the electric valve (121).

5. The dosing device (100) according to claim 1, characterized in that The feeding unit (10) further includes: Raw material storage silo (16), the raw material storage silo (16) is used to store materials; The conveying pipeline (18) connects the raw material storage silo (16) and the batching silo (12). A delivery pump (17) is provided on the delivery pipeline (18) and configured to drive material from the raw material storage bin (16) to the batching bin (12). One or more valves are installed on the delivery pipe (18).

6. The dosing device (100) according to claim 5, characterized in that The conveying pump (17) is a silo pump, and the one or more valves include: a conveying valve (161) located downstream of the raw material storage silo (16), a feed valve (171) located upstream of the silo pump, and a discharge valve (173) located downstream of the silo pump.

7. The dosing device (100) according to claim 5, characterized in that The delivery pipe (18) includes a plurality of straight pipes (182) and a bend member (184) detachably connected between two adjacent straight pipes (182).

8. The dosing device (100) according to claim 1, characterized in that It also includes a backup screw conveyor (22), each of the feeding units (10) being fluidly connected in switchable manner to the screw conveyor (20) and the backup screw conveyor (22).

9. The dosing device (100) according to claim 1, characterized in that Also includes: A mixing bin (30) is configured to receive and mix materials from the screw conveyor (20); Feeder (40), the feeder (40) is configured to convey the material in the mixing bin (30) to the molten salt chlorination furnace (200); A charging valve (31) is provided between the mixing bin (30) and the charging machine (40).

10. The dosing device (100) according to claim 9, characterized in that A standby charging machine (42) is also included, and the mixing bin (30) is in switchable fluid communication with the charging machine (40) and the standby charging machine (42).

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