Novel dust collection device in process of producing titanium tetrachloride by using molten salt chlorination method

Abstract

The utility model belongs to the technical field of titanium tetrachloride production, and relates to a novel dust collection device, in particular to a novel dust collection device in the process of producing titanium tetrachloride by a fused salt chlorination method. By installing the automatic gate valve and the heating furnace, liquid titanium tetrachloride can be effectively prevented from entering the dust collection slag tank, a large amount of air can be prevented from entering a production system when the dust collection slag tank is replaced, and leakage of titanium tetrachloride gas when the dust collection slag tank is replaced is prevented, so that the titanium yield of titanium tetrachloride is improved, and the production cost is reduced. And the working environment of a dust collection area can be effectively improved, so that green and clean production of fused salt chlorination is realized. The two-half heating furnace is arranged, the dust collection slag tank is convenient to replace, and the flat car is arranged at the bottom of the heating furnace, so that the heating furnace is convenient to move when the dust collection slag tank is replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of titanium tetrachloride production, relates to a novel dust collecting device, and specifically relates to a novel dust collecting device in the process of producing titanium tetrachloride by a molten salt chlorination method. Background Art

[0002] In the molten salt chlorination production process, the molten salt chlorination furnace operates at a slightly negative pressure. Titanium tetrachloride gas and other chloride gases and tiny solid particles generated after the reaction of materials in the furnace are collected by the dust collecting tank to remove the solid particle impurities, and the titanium tetrachloride gas enters the subsequent condensation system.

[0003] At present, the domestic molten salt chlorination method for producing titanium tetrachloride still uses the most primitive dust collection method, and there has been no technical breakthrough or improvement. During the dust collection process, since the lower part of the dust collector is a cone, the lower part of the cone is connected to a dust collection slag tank; at the same time, the cone is equipped with an electric heater to prevent the titanium tetrachloride gas from liquefying; since the dust collection slag tank is at the bottom of the dust collector, the temperature is relatively low, causing part of the titanium tetrachloride gas to condense into liquid, accompanied by solid impurity particles falling into the dust collection slag tank, and when the dust collection slag tank is replaced, titanium tetrachloride will come into contact with the air and produce a lot of white smoke, resulting in a bad working environment, equipment corrosion and other problems; at the same time, during the replacement of the dust collection slag tank, a large amount of air will enter the production system, causing problems such as abnormal production system and poor condensation effect of the condensation system, which seriously affects normal production.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The utility model aims to overcome the disadvantages of the prior art and provide a novel dust collecting device in the process of producing titanium tetrachloride by molten salt chlorination method.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel dust collecting device for producing titanium tetrachloride by a molten salt chlorination method comprises a conical dust collector, the bottom end of which is connected to a dust collecting slag pot via an automatic gate valve, a heating furnace for preventing the liquefaction of titanium tetrachloride is arranged on the periphery of the dust collecting slag pot; the leakage of titanium tetrachloride when replacing the dust collecting slag pot is avoided by opening and closing the automatic gate valve.

[0008] Specifically, the automatic gate valve comprises a valve body arranged between a conical dust collector and a dust collecting slag tank, a scraper for opening and closing the automatic gate valve is arranged in the valve body, the scraper is provided with a push-pull rod for driving it to open and close, the push-pull rod is provided with a driving structure for driving it to move, the driving structure is fixedly connected to the valve body through a fixing device, the valve body is also provided with a gate plate docking with the scraper, the scraper is close to the gate plate, the automatic gate valve is closed, the scraper is away from the gate plate, the automatic gate valve is opened;

[0009] The gate of the automatic gate valve is made of special material, which is corrosion-resistant, friction-resistant and strong. The valve body of the automatic gate valve is provided with a scraper, which can effectively scrape off the solid impurities adhered to the gate.

[0010] Specifically, the driving structure includes a cylinder with air inlet and outlet solenoid valves, a piston matched with the cylinder, and an air storage device for storing compressed air; the piston is fixedly connected to the push-pull rod, a spring is provided in the cavity formed by the piston and the cylinder, the air storage device is connected to the air inlet and outlet solenoid valves, and the switching power source of the automatic gate valve is a spring and compressed air with a pressure greater than 0.6Mpa.

[0011] Specifically, the automatic gate valve includes a valve body arranged between the conical dust collector and the dust slag tank, the valve body is provided with a scraper for opening and closing the automatic gate valve, the scraper is rotatably fixed to one end of the push-pull rod, the other end of the push-pull rod passes through a fixing device and is fixedly connected to a handwheel, the fixing device is fixedly connected to the valve body, the push-pull rod is provided with a first thread, and the fixing device is provided with a second thread matched with the first thread.

[0012] Specifically, the heating furnace is a two-half detachable conical structure, and the conical structure includes an inner ring structure for heat insulation and an outer ring structure for fixing the inner ring structure; preferably, the heating furnace is a two-half hinged conical structure, which is convenient for opening the heating furnace to take out the dust slag tank when the dust slag tank needs to be dumped (the dust slag tank is very heavy after being full of dust); the automatic gate valve and the dust slag tank are fully enclosed and pressure-resistant, and can withstand a pressure of 0.4-0.5Mpa, and corrosive gases cannot enter the thermocouple sleeve through the joint to corrode the thermocouple measuring element.

[0013] Specifically, the inner ring structure is provided with a plurality of electrically heated heating belts, which are fixedly connected to the outer ring structure through insulators after passing through the heating furnace, and the heating belts are made of nickel-chromium alloy.

[0014] Specifically, the heating furnace is also provided with a thermocouple, and the thermocouple is connected to an automatic temperature control system for controlling the heating furnace. The thermocouple is a K-type thermocouple, which does not require frequent manual operation to start and stop the temperature control, and can achieve the temperature in the dust slag tank always maintained at a constant temperature, effectively and continuously evaporating the liquid titanium tetrachloride in the dust slag tank.

[0015] Specifically, the automatic temperature control system includes an intelligent temperature controller, a power distribution system and thermocouple connecting wires.

[0016] Specifically, the heating furnace is arranged on a flatbed truck. Preferably, the flatbed truck is an electric flatbed truck.

[0017] Compared with the prior art, the technical solution provided by the utility model includes the following beneficial effects:

[0018] The utility model can prevent a large amount of air from entering the production system when the dust collecting slag tank is replaced by arranging an automatic gate valve; a heating furnace is arranged outside the dust collecting slag tank, which can effectively prevent the titanium tetrachloride in the dust collecting slag tank from liquefying and prevent the leakage of titanium tetrachloride gas when the dust collecting slag tank is replaced; thereby the titanium yield of titanium tetrachloride is increased, and the working environment of the dust collecting area can be effectively improved, thereby realizing the green and clean production of molten salt chlorination. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the present utility model.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the automatic gate valve of the utility model;

[0023] Figure 3 This is a schematic diagram of the connection structure of the scraper and the push-pull rod of the utility model;

[0024] Figure 4 This is a schematic diagram of the heating furnace structure of the utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the heating furnace of the utility model;

[0026] Figure 6 It is a schematic diagram of the automatic temperature control system of the utility model.

[0027] Among them: 1 is a conical dust collector; 2 is an automatic gate valve; 21 is a valve body; 22 is a scraper; 23 is a push-pull rod; 24 is a fixing device; 25 is a push rod structure; 251 is a cylinder; 252 is a spring; 253 is a piston; 254 is an inlet and outlet solenoid valve; 26 is a hand wheel; 27 is a gate; 3 is a dust collecting slag tank; 4 is a heating furnace; 41 is an insulator; 42 is a heating belt; 43 is an outer ring structure; 44 is an inner ring structure; 5 is a flatbed car; 6 is an intelligent temperature controller; 7 is a power distribution system; 8 is a thermocouple connecting wire. DETAILED DESCRIPTION

[0028] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. Instead, they are only examples consistent with some aspects of the present utility model as detailed in the attached claims.

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Example 1

[0031] This embodiment provides a new dust collecting device for producing titanium tetrachloride by molten salt chlorination method, comprising a conical dust collector 1, the bottom end of which is connected to a dust collecting slag pot 3 through an automatic gate valve 2, and a heating furnace 4 is arranged on the periphery of the dust collecting slag pot 3 to prevent the liquefaction of titanium tetrachloride; the leakage of titanium tetrachloride when replacing the dust collecting slag pot 3 is avoided by opening and closing the automatic gate valve 2. Figure 1 shown.

[0032] Specifically, the automatic gate valve 2 includes a valve body 21 disposed between the conical dust collector 1 and the dust collecting slag pot 3, a scraper 22 for opening and closing the automatic gate valve 2 is provided in the valve body 21, and a gate plate 27 docking the scraper 22 is provided in the valve body 21. When the scraper 22 is close to the gate plate 27, the automatic gate valve 2 is closed, and when the scraper 22 is away from the gate plate 27, the automatic gate valve 2 is opened;

[0033] The push-pull rod 23 is provided with a driving structure 25 for driving the push-pull rod 23 to move. The scraper 22 is also rotatably fixed to one end of the push-pull rod 23. The other end of the push-pull rod 23 passes through the fixing device 24 and the driving structure 25 and is fixedly connected to the hand wheel 26. The driving structure 25 is fixedly connected to the valve body 21 through the fixing device 24. Figure 2-3 shown.

[0034] Specifically, the driving structure 25 includes a cylinder 251 provided with an inlet and outlet electromagnetic valve 254, a piston 253 matched with the cylinder 251, and an air storage device for storing compressed air; the piston 253 is fixedly connected to the push-pull rod 23, a spring 252 is provided in the cavity formed by the piston 253 and the cylinder 251, and the air storage device is connected to the inlet and outlet electromagnetic valve 254. Figure 2 shown.

[0035] Specifically, the heating furnace 4 is a two-half detachable conical structure, and the conical structure includes an inner ring structure 44 for heat insulation and an outer ring structure 43 for fixing the inner ring structure 44; preferably, the heating furnace 4 is a two-half hinged conical structure. Figure 4 shown.

[0036] Specifically, the inner ring structure 44 is provided with a plurality of electrically heated heating belts 42, and the heating belts 42 are fixedly connected to the outer ring structure 43 through insulators 41 after passing through the heating furnace 4. Figure 5 shown.

[0037] Specifically, the heating furnace 4 is further provided with a thermocouple, and the thermocouple is connected to an automatic temperature control system for controlling the heating furnace 4 .

[0038] Specifically, the automatic temperature control system includes an intelligent temperature controller 6, a power distribution system 7, and a thermocouple connecting wire 8. Figure 6 shown.

[0039] Specifically, the heating furnace 4 is arranged on a flatbed truck 5. Preferably, the flatbed truck 5 is an electric flatbed truck. Figure 4 shown.

[0040] This embodiment also provides a method for using a new dust collecting device in the process of producing titanium tetrachloride by molten salt chlorination method, and the specific method is as follows:

[0041] When the dust collecting slag tank 3 needs to be replaced, the air inlet of the air inlet and outlet solenoid valve 254 is opened, and the compressed air enters the cylinder 251, forcing the piston 253 to compress the spring 252 and at the same time making the push-pull rod 23 drive the scraper 22 close to the gate 27, so that the automatic gate valve 2 is closed, and then the electric flatbed car is pushed to separate the dust collecting slag tank 3 from the automatic gate valve 2, and the automatic temperature control system is turned off, and then the two-half heating furnace 4 is opened, the dust collecting slag tank 3 is taken out and the dust slag is dumped, and then the dust collecting slag tank 3 is placed in the heating furnace 4 and closed. Close the heating furnace 4, push the electric flatbed car to align the dust collecting slag tank 3 with the automatic gate valve 2 and seal them, then open the air outlet of the air inlet and outlet solenoid valve 254, release the compressed air in the cylinder 251, and at the same time, the piston 253, under the action of the elastic force of the spring 252, drives the push-pull rod 23 to drive the scraper 22 away from the gate 27, so that the automatic gate valve 2 opens; at the same time, turn on the automatic temperature control system, so that the heating furnace 4 heats the dust collecting slag tank 3 in real time to prevent the titanium tetrachloride entering the dust collecting slag tank 3 from liquefying. Figure 4-6 shown.

[0042] When the driving structure 25 is damaged or in an emergency, the hand wheel 26 can be pushed to make the push-pull rod 23 drive the scraper 22 close to the gate 27 to close the automatic gate valve 2, or the hand wheel 26 can be pulled to make the push-pull rod 23 drive the scraper 22 away from the gate 27 to open the automatic gate valve 2. Figure 2 shown.

[0043] Example 2

[0044] This embodiment provides a new dust collecting device for producing titanium tetrachloride by molten salt chlorination method, comprising a conical dust collector 1, the bottom end of which is connected to a dust collecting slag pot 3 through an automatic gate valve 2, and a heating furnace 4 is arranged on the periphery of the dust collecting slag pot 3 to prevent the liquefaction of titanium tetrachloride; the leakage of titanium tetrachloride when replacing the dust collecting slag pot 3 is avoided by opening and closing the automatic gate valve 2. Figure 1 shown.

[0045] Specifically, the automatic gate valve 2 includes a valve body 21 disposed between the conical dust collector 1 and the dust collecting slag pot 3, a scraper 22 for opening and closing the automatic gate valve 2 is provided in the valve body 21, and a gate plate 27 docking the scraper 22 is provided in the valve body 21. When the scraper 22 is close to the gate plate 27, the automatic gate valve 2 is closed, and when the scraper 22 is away from the gate plate 27, the automatic gate valve 2 is opened;

[0046] The scraper 22 is provided with a push-pull rod 23 for driving it to open and close, and the push-pull rod 23 is provided with a driving structure 25 for driving it to move, and the driving structure 25 is fixedly connected to the valve body 21 through a fixing device 24. Figure 2-3 shown.

[0047] Specifically, the driving structure 25 includes a cylinder 251 provided with an inlet and outlet electromagnetic valve 254, a piston 253 matched with the cylinder 251, and an air storage device for storing compressed air; the piston 253 is fixedly connected to the push-pull rod 23, a spring 252 is provided in the cavity formed by the piston 253 and the cylinder 251, and the air storage device is connected to the inlet and outlet electromagnetic valve 254. Figure 2 shown.

[0048] Specifically, the heating furnace 4 is a two-half detachable conical structure, and the conical structure includes an inner ring structure 44 for heat insulation and an outer ring structure 43 for fixing the inner ring structure 44; preferably, the heating furnace 4 is a two-half hinged conical structure. Figure 4 shown.

[0049] Specifically, the inner ring structure 44 is provided with a plurality of electrically heated heating belts 42, and the heating belts 42 are fixedly connected to the outer ring structure 43 through insulators 41 after passing through the heating furnace 4. Figure 5 shown.

[0050] Specifically, the heating furnace 4 is further provided with a thermocouple, and the thermocouple is connected to an automatic temperature control system for controlling the heating furnace 4 .

[0051] Specifically, the automatic temperature control system includes an intelligent temperature controller 6, a power distribution system 7, and a thermocouple connecting wire 8. Figure 6 shown.

[0052] Specifically, the heating furnace 4 is arranged on a flatbed truck 5. Preferably, the flatbed truck 5 is an electric flatbed truck. Figure 4 shown.

[0053] This embodiment also provides a method for using a new dust collecting device in the process of producing titanium tetrachloride by molten salt chlorination method. Different from Embodiment 1, this embodiment uses a driving structure 25 to drive the scraper 22 to approach or move away from the gate plate 27.

[0054] Example 3

[0055] This embodiment provides a new dust collecting device for producing titanium tetrachloride by molten salt chlorination method, comprising a conical dust collector 1, the bottom end of which is connected to a dust collecting slag pot 3 through an automatic gate valve 2, and a heating furnace 4 is arranged on the periphery of the dust collecting slag pot 3 to prevent the liquefaction of titanium tetrachloride; the leakage of titanium tetrachloride when replacing the dust collecting slag pot 3 is avoided by opening and closing the automatic gate valve 2. Figure 1 shown.

[0056] Specifically, the automatic gate valve 2 includes a valve body 21 disposed between the conical dust collector 1 and the dust collecting slag pot 3, a scraper 22 for opening and closing the automatic gate valve 2 is disposed in the valve body 21, and a gate plate 27 docking the scraper 22 is further disposed in the valve body 21. When the scraper 22 is close to the gate plate 27, the automatic gate valve 2 is closed, and when the scraper 22 is away from the gate plate 27, the automatic gate valve 2 is opened; see Figure 2 As shown;

[0057] The scraper 22 is rotatably fixed to one end of the push-pull rod 23, and the other end of the push-pull rod 23 is fixedly connected to the hand wheel 26 after passing through the fixing device 24. The fixing device 24 is fixedly connected to the valve body 21. The push-pull rod 23 is provided with a first thread, and the fixing device 24 is provided with a second thread adapted to the first thread.

[0058] Specifically, the heating furnace 4 is a two-half detachable conical structure, and the conical structure includes an inner ring structure 44 for heat insulation and an outer ring structure 43 for fixing the inner ring structure 44; preferably, the heating furnace 4 is a two-half hinged conical structure. Figure 4 shown.

[0059] Specifically, the inner ring structure 44 is provided with a plurality of electrically heated heating belts 42, and the heating belts 42 are fixedly connected to the outer ring structure 43 through insulators 41 after passing through the heating furnace 4. Figure 5 shown.

[0060] Specifically, the heating furnace 4 is further provided with a thermocouple, and the thermocouple is connected to an automatic temperature control system for controlling the heating furnace 4 .

[0061] Specifically, the automatic temperature control system includes an intelligent temperature controller 6, a power distribution system 7, and a thermocouple connecting wire 8. Figure 6 shown.

[0062] Specifically, the heating furnace 4 is arranged on a flatbed truck 5. Preferably, the flatbed truck 5 is an electric flatbed truck. Figure 4 shown.

[0063] This embodiment also provides a method for using a new dust collecting device in the process of producing titanium tetrachloride by molten salt chlorination method. The difference from Embodiment 1 is that this embodiment uses rotating hand wheel 26 to drive scraper 22 to approach or move away from gate plate 27.

[0064] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0065] It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A novel dust collecting device for producing titanium tetrachloride by molten salt chlorination method, characterized in that: The invention comprises a conical dust collector (1), the bottom end of which is connected to a dust collecting slag tank (3) via an automatic gate valve (2), and a heating furnace (4) for preventing the liquefaction of titanium tetrachloride is arranged on the periphery of the dust collecting slag tank (3); the leakage of titanium tetrachloride when replacing the dust collecting slag tank (3) is avoided by opening and closing the automatic gate valve (2).

2. The novel dust collecting device according to claim 1 is characterized in that: The automatic gate valve (2) comprises a valve body (21) arranged between a conical dust collector (1) and a dust collecting slag tank (3); a scraper (22) for opening and closing the automatic gate valve (2) is arranged in the valve body (21); the scraper (22) is provided with a push-pull rod (23) for driving the push-pull rod (23) to perform opening and closing actions; the push-pull rod (23) is provided with a driving structure (25) for driving the push-pull rod (23) to move; and the driving structure (25) is fixedly connected to the valve body (21) via a fixing device (24).

3. The novel dust collecting device according to claim 2 is characterized in that: The driving structure (25) comprises a cylinder (251) provided with an air inlet and outlet electromagnetic valve (254), a piston (253) matched with the cylinder (251), and an air storage device for storing compressed air; the piston (253) is fixedly connected to the push-pull rod (23), a spring (252) is provided in the cavity formed by the piston (253) and the cylinder (251), and the air storage device is connected to the air inlet and outlet electromagnetic valve (254).

4. The novel dust collecting device according to claim 1 is characterized in that: The automatic gate valve (2) comprises a valve body (21) arranged between a conical dust collector (1) and a dust collecting slag tank (3); a scraper (22) for opening and closing the automatic gate valve (2) is arranged in the valve body (21); the scraper (22) is rotatably fixed to one end of a push-pull rod (23); the other end of the push-pull rod (23) passes through a fixing device (24) and is fixedly connected to a hand wheel (26); the fixing device (24) is fixedly connected to the valve body (21); the push-pull rod (23) is provided with a first thread; and the fixing device (24) is provided with a second thread matched with the first thread.

5. The novel dust collecting device according to claim 1 is characterized in that: The heating furnace (4) is a two-half detachable conical structure, and the conical structure comprises an inner ring structure (44) for heat insulation and an outer ring structure (43) for fixing the inner ring structure (44).

6. The novel dust collecting device according to claim 5 is characterized in that: The inner ring structure (44) is provided with a plurality of electrically heated heating belts (42), and the heating belts (42) are fixedly connected to the outer ring structure (43) through insulators (41) after passing through the heating furnace (4).

7. The novel dust collecting device according to claim 1 is characterized in that: The heating furnace (4) is also provided with a thermocouple, and the thermocouple is connected to an automatic temperature control system for controlling the heating furnace (4).

8. The novel dust collecting device according to claim 7 is characterized in that: The automatic temperature control system comprises an intelligent temperature controller (6), a power distribution system (7) and a thermocouple connecting wire (8).

9. The novel dust collecting device according to claim 1 is characterized in that: The heating furnace (4) is arranged on a flatbed vehicle (5).

10. The novel dust collecting device according to claim 9, characterized in that: The flatbed vehicle (5) is an electric flatbed vehicle.

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