Molten salt temperature measuring device in process of producing titanium tetrachloride by using molten salt chlorination method

Abstract

The utility model relates to the technical field of fused salt chlorination production, in particular to a fused salt temperature measuring device in the process of producing titanium tetrachloride by a fused salt chlorination method, which comprises a temperature measuring thermocouple assembly, a reinforcing rib is sleeved on the outer surface of the temperature measuring thermocouple assembly, and a blind pipe assembly is arranged in the reinforcing rib. A furnace shell is arranged on the outer surface of the blind pipe assembly, and furnace bricks are arranged in the furnace shell. Through the arrangement of the reinforcing ribs, the blind pipe assembly, the furnace shell, the furnace bricks, the blind pipe flange, the blind pipe sealing structure and the blind pipe, safer and more stable temperature measurement and installation operation of equipment can be achieved, the hole opening position of the molten salt furnace temperature measurement device and the hole position in the furnace are below the liquid level of molten salt, and the temperature measurement device installation hole is completed when the furnace bricks are built; a blind pipe assembly made of a special material is additionally arranged in the hole, blind pipe sealing structure treatment is carried out on the outer wall of the blind pipe assembly, and the blind pipe assembly is pre-buried in the furnace body during furnace building and is welded and positioned through reinforcing ribs and a furnace shell.

Description

Technical Field

[0001] The utility model relates to the technical field of molten salt chlorination production, in particular to a molten salt temperature measuring 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 reaction temperature control of the material in the molten salt furnace is a very important process control data in the production process. In production, there is often chlorine gas participating in the reaction in the furnace. If the molten salt temperature is measured directly, under the high temperature of the molten salt, the metal protective tube of the thermocouple is often burned out or corroded and perforated in a few days, causing the temperature measuring thermocouple to be damaged and unable to measure the temperature. The high-temperature molten salt will also have a great risk of leakage, endangering the safety of personnel and equipment.

[0003] At present, the temperature measuring devices for producing titanium tetrachloride by the molten salt chlorination method in China all adopt an indirect measurement method. This measurement method has a strong lag and is generally affected by the environment and installation method, resulting in a large measurement error. It cannot reflect the production status in the furnace in real time, resulting in the material not being able to fully react during the production process. The unreacted chlorine enters the condensation and exhaust system along with the titanium tetrachloride flue gas, which will not only accelerate equipment corrosion, but also cause the alkali consumption of the exhaust gas leaching system to increase exponentially. The chlorine that cannot be fully absorbed by the alkali solution enters the exhaust chimney, causing serious exhaust gas emissions exceeding the standard and environmental pollution, and cannot meet daily use needs. Therefore, it is urgent to design a molten salt temperature measurement device for the production of titanium tetrachloride by the molten salt chlorination method to solve the above problems. Summary of the invention

[0004] The utility model aims to provide a molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method, so as to solve the problem that the temperature measuring devices for producing titanium tetrachloride by molten salt chlorination method in China at present all adopt indirect measurement method, such measurement method has strong lag, and is generally affected by the environment and installation method. The measurement error is large, and the production status in the furnace cannot be reflected in real time, resulting in that the materials cannot fully react in the production process, and the unreacted chlorine enters the condensation and tail gas system along with the titanium tetrachloride flue gas, which not only accelerates the corrosion of the equipment, but also causes the alkali consumption of the tail gas leaching system to increase exponentially, and the chlorine that cannot be fully absorbed by the alkali solution enters the tail gas chimney, causing serious excessive tail gas emissions and environmental pollution, and cannot meet the daily use needs.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method, comprising a temperature measuring thermocouple assembly, the outer surface of the temperature measuring thermocouple assembly is sleeved with reinforcing ribs, a blind tube assembly is arranged inside the reinforcing ribs, the outer surface of the blind tube assembly is arranged with a furnace shell, and furnace bricks are arranged inside the furnace shell.

[0006] Preferably, a blind pipe flange is provided at one end of the blind pipe assembly, a blind pipe sealing structure is provided on the side of the blind pipe assembly, and a blind pipe is provided in the internal body of the blind pipe assembly.

[0007] Preferably, a thermocouple flange is provided at the front end of the temperature measuring thermocouple assembly, and a thermocouple protection sleeve is fixedly connected to one end of the thermocouple flange.

[0008] Preferably, one end of the thermocouple protection sleeve is fixedly connected to a sealing sleeve, and temperature measuring elements are arranged inside the thermocouple protection sleeve and the sealing sleeve.

[0009] Preferably, the reinforcing ribs and the furnace shell are welded and positioned, and the temperature measuring thermocouple assembly and the blind tube assembly are adapted to each other.

[0010] Preferably, a temperature measuring opening is provided on the side of the furnace brick, and the blind tube assembly is adapted to the temperature measuring opening.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The molten salt temperature measuring device in the process of producing titanium tetrachloride by the molten salt chlorination method can realize safer and more stable temperature measurement installation operation of the equipment through the arranged reinforcing ribs, blind pipe components, furnace shells, furnace bricks, blind pipe flanges, blind pipe sealing structures and blind pipes. The opening position of the molten salt furnace temperature measuring device and the position of the hole in the furnace are below the liquid surface of the molten salt. The installation hole of the temperature measuring device is completed when the furnace bricks are laid. A blind pipe component of a special material is installed in the hole. The outer wall of the blind pipe component is treated with a blind pipe sealing structure. When laying the furnace, the blind pipe component is pre-buried in the furnace body, and is positioned by welding the reinforcing ribs and the furnace shell, and the blind pipe flanges are butt-jointed. At this time, the blind pipe can directly contact the high-temperature molten salt, and a direct measurement method can be adopted. The temperature detection error is small, the lag effect is small, and the production temperature in the molten salt chlorination furnace can be monitored in real time, which reflects the practicality of the equipment design.

[0013] The molten salt temperature measuring device in the process of producing titanium tetrachloride by the molten salt chlorination method further improves the overall use effect of the equipment by arranging a temperature measuring thermocouple assembly, a thermocouple flange, a thermocouple protection sleeve, a sealing sleeve and a temperature measuring element. The special material is corrosion-resistant, erosion-resistant, has high strength and good thermal conductivity. The temperature measuring thermocouple assembly is connected to the blind pipe flange through the thermocouple flange. The property of the temperature measuring thermocouple assembly itself can realize that the thermocouple is a K-type measurement range of 0-1200°C. The thermocouple protection sleeve is made of a special material, which is corrosion-resistant, erosion-resistant, has high strength and good thermal conductivity. The temperature measuring element welded on the head of the protection tube is fully sealed and pressure-resistant, and can withstand a pressure of 0.4Mpa to 0.5Mpa. Corrosive gases cannot enter the thermocouple sleeve through the joint to corrode the thermocouple temperature measuring element. The temperature of high-temperature molten salt can be continuously measured online. The service life of the device is one and a half years to two years. The existing technical problem of directly measuring the molten salt temperature in the production process of the molten salt chlorination furnace is solved, and the practicality of the equipment is reflected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation position of the structure of the utility model;

[0015] Figure 2 It is a front view schematic diagram of the blind tube assembly structure of the utility model;

[0016] Figure 3 It is an internal schematic diagram of the temperature measuring thermocouple component structure of the utility model.

[0017] In the figure: 1. Temperature measuring thermocouple assembly; 2. Reinforcing ribs; 3. Blind pipe assembly; 4. Furnace shell; 5. Furnace bricks; 6. Blind pipe flange; 7. Blind pipe sealing structure; 8. Blind pipe; 9. Thermocouple flange; 10. Thermocouple protection sleeve; 11. Sealing sleeve; 12. Temperature measuring element. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 , an embodiment provided by the utility model:

[0020] A molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method, comprising a temperature measuring thermocouple assembly 1, the outer surface of the temperature measuring thermocouple assembly 1 is sleeved with a reinforcing rib 2, one end of a blind pipe assembly 3 is provided with a blind pipe flange 6, the side of the blind pipe assembly 3 is provided with a blind pipe sealing structure 7, the inner body of the blind pipe assembly 3 is provided with a blind pipe 8, the front end of the temperature measuring thermocouple assembly 1 is provided with a thermocouple flange 9, one end of the thermocouple flange 9 is fixedly connected with a thermocouple protection sleeve 10, and the thermocouple protection sleeve One end of 10 is fixedly connected with a sealing sleeve 11, and a temperature measuring element 12 is arranged inside the thermocouple protection sleeve 10 and the sealing sleeve 11. The temperature measuring thermocouple assembly 1 is connected to the blind pipe flange 6 through the thermocouple flange 9. The property of the temperature measuring thermocouple assembly 1 itself can realize the thermocouple as K type with a measurement range of 0-1200℃. The thermocouple protection sleeve 10 is made of special material, which is corrosion-resistant, erosion-resistant, strong and has good thermal conductivity. The temperature measuring element 12 is welded on the head of the protection tube to perform fully enclosed pressure-resistant treatment.

[0021] A blind pipe assembly 3 is provided inside the reinforcing rib 2, a furnace shell 4 is provided on the outer surface of the blind pipe assembly 3, a furnace brick 5 is provided inside the furnace shell 4, the reinforcing rib 2 and the furnace shell 4 are welded and positioned, the temperature measuring thermocouple assembly 1 and the blind pipe assembly 3 are adapted to each other, a temperature measuring opening is provided on the side of the furnace brick 5, the blind pipe assembly 3 is adapted to the temperature measuring opening, the temperature measuring device installation hole is completed when the furnace brick 5 is laid, a blind pipe assembly 3 of a special material is added to the hole, the outer wall of the blind pipe assembly 3 is treated with a blind pipe sealing structure 7, the blind pipe assembly 3 is pre-buried in the furnace body when the furnace is laid, and is welded and positioned by the reinforcing rib 2 and the furnace shell 4, and the blind pipe flange 6 is butt-jointed.

[0022] Working principle: When in use, the user first positions the opening position of the temperature measuring device of the molten salt furnace, and the position of the hole in the furnace is below the liquid level of the molten salt. The installation hole of the temperature measuring device is completed when the furnace bricks 5 are laid, and a blind pipe component 3 of a special material is installed in the hole. The outer wall of the blind pipe component 3 is treated with a blind pipe sealing structure 7. When laying the furnace, the blind pipe component 3 is pre-buried in the furnace body, and is welded and positioned with the reinforcing ribs 2 and the furnace shell 4, and the blind pipe flange 6 is butt-jointed. At this time, the blind pipe 8 can directly contact the high-temperature molten salt, and a direct measurement method can be used. The temperature detection error is small, the lag effect is small, and the production temperature in the molten salt chlorination furnace can be monitored in real time. This special material is corrosion-resistant, erosion-resistant, strong and has good thermal conductivity. The temperature measuring thermocouple component 1 is thermally The thermocouple flange 9 is connected to the blind pipe flange 6. The properties of the temperature measuring thermocouple assembly 1 itself can realize a K-type thermocouple with a measuring range of 0-1200°C. The thermocouple protection sleeve 10 is made of a special material, which is corrosion-resistant, erosion-resistant, strong and has good thermal conductivity. The temperature measuring element 12 welded on the head of the protection tube is fully enclosed and pressure-resistant, and can withstand a pressure of 0.4Mpa to 0.5Mpa. Corrosive gases cannot enter the thermocouple sleeve through the joints to corrode the thermocouple temperature measuring element 12. The high-temperature molten salt temperature can be continuously measured online. The service life of the device is one and a half years to two years, which solves the existing technical problem of directly measuring the molten salt temperature in the production process of the molten salt chlorination furnace. The above is the entire working principle of the utility model.

[0023] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method, comprising a temperature measuring thermocouple assembly (1), characterized in that: The outer surface of the temperature measuring thermocouple assembly (1) is provided with reinforcing ribs (2), a blind tube assembly (3) is provided inside the reinforcing ribs (2), a furnace shell (4) is provided on the outer surface of the blind tube assembly (3), and furnace bricks (5) are provided inside the furnace shell (4).

2. The molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method according to claim 1, characterized in that: A blind tube flange (6) is provided at one end of the blind tube assembly (3), a blind tube sealing structure (7) is provided on the side of the blind tube assembly (3), and a blind tube (8) is provided inside the main body of the blind tube assembly (3).

3. The molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method according to claim 1, characterized in that: A thermocouple flange (9) is provided at the front end of the temperature measuring thermocouple assembly (1), and a thermocouple protection sleeve (10) is fixedly connected to one end of the thermocouple flange (9).

4. The molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method according to claim 3, characterized in that: One end of the thermocouple protection sleeve (10) is fixedly connected to a sealing sleeve (11), and a temperature measuring element (12) is arranged inside the thermocouple protection sleeve (10) and the sealing sleeve (11).

5. The molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method according to claim 1, characterized in that: The reinforcing rib (2) and the furnace shell (4) are welded and positioned, and the temperature measuring thermocouple assembly (1) and the blind tube assembly (3) are adapted to each other.

6. The molten salt temperature measuring device in the process of producing titanium tetrachloride by molten salt chlorination method according to claim 1, characterized in that: A temperature measurement opening is provided on the side of the furnace brick (5), and the blind tube assembly (3) is compatible with the temperature measurement opening.

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