Molten salt temperature control device in production of phthalic anhydride by naphthalene method

Abstract

The utility model provides a molten salt temperature control device in production of phthalic anhydride by a naphthalene method, which comprises a bottom plate, a furnace body arranged in the middle of the upper part of the bottom plate, a reaction cavity arranged in the furnace body, a heat transfer pipeline connected to the outer side wall of the reaction cavity, and a heat transfer assembly arranged at the upper end of the bottom plate and connected with the heat transfer pipeline, according to the fused salt temperature control device in the production of phthalic anhydride prepared by the naphthalene method, the temperature in the reaction cavity can be monitored through the infrared sensor, and the position of the infrared sensor can be moved through the monitoring device, so that the temperature of the reaction cavity can be monitored, and the temperature of the reaction cavity can be monitored. Temperature monitoring of a plurality of key positions is realized, and more comprehensive data is obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature control devices, in particular to a molten salt temperature control device in the production of phthalic anhydride using the naphthalene process. Background Art

[0002] In the production of phthalic anhydride by the naphthalene process, the molten salt temperature control device is a key equipment for maintaining the reaction temperature. As an efficient heat transfer medium, the molten salt is heated to a high temperature and then circulated, transferring heat to the reaction materials through a heat exchanger to ensure that the reaction is carried out at an appropriate temperature. The system monitors the temperature of the molten salt and materials in the reactor through temperature sensors and feeds the data back to the control system. The staff adjusts the power of the heating or cooling device according to the preset temperature curve to maintain the stability of the temperature of the entire system.

[0003] In the prior art, an infrared sensor is usually fixedly installed on the side wall of the furnace body to monitor the temperature inside the reaction chamber and ensure that the temperature inside the reaction chamber is suitable for the material to react. However, in this method, the infrared sensor is fixedly installed on the side wall of the furnace body, and the position of the infrared sensor cannot be adjusted. It may not be able to cover all areas that need to be monitored in the furnace body, especially when the internal structure of the furnace body is complex or there are obstacles. In this way, more infrared sensors need to be installed on the side wall of the furnace body, which increases the installation cost and the complexity of data processing. Utility Model Content

[0004] In view of this, the utility model addresses the deficiencies of the existing technology and provides a molten salt temperature control device for the production of phthalic anhydride by the naphthalene process. The device can not only monitor the temperature in the reaction chamber through an infrared sensor, but also move the position of the infrared sensor through the monitoring device to achieve temperature monitoring of multiple key positions and obtain more comprehensive data.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a molten salt temperature control device in the production of phthalic anhydride by the naphthalene process, comprising a base plate, a furnace body is provided in the middle part above the base plate, a reaction chamber is provided inside the furnace body, a heat transfer pipeline is connected to the outer wall of the reaction chamber, a heat transfer component connected to the heat transfer pipeline is provided at the upper end of the base plate, and a monitoring device for monitoring the temperature of the reaction chamber is provided inside the furnace body.

[0006] As a further improvement of the present invention, the monitoring device includes two slide grooves arranged at the bottom of the furnace body, threaded rods are rotatably arranged inside the slide grooves, sliders are threadedly connected to the threaded rods, telescopic push rods are fixedly arranged on the upper ends of the sliders, and the telescopic ends of the telescopic push rods are commonly connected to infrared sensors. A driving member for driving the threaded rods to rotate is provided inside the furnace body, and the driving member includes a motor arranged at the left end of the rear slide groove, and the output end of the motor is connected to the threaded rod at the rear end through a coupling, and the close ends of the two threaded rods are connected to helical gears, and the two helical gears are meshed with each other.

[0007] As a further improvement of the present invention, the heat transfer component includes a temperature control component arranged at the left end of the base plate and a molten salt radiator arranged at the right end of the base plate. A molten salt pump is arranged at the lower end of the base plate. The heat transfer pipeline includes an input pipeline connected to the upper end of the molten salt radiator and an output pipeline connected to the left end of the molten salt pump, and a heat conduction pipe spirally wound on the side wall of the reaction chamber. The right end of the molten salt pump is connected to the lower end of the molten salt radiator through the pump outlet pipeline. The upper end of the temperature control component is provided with a temperature control input pipeline 2 connected to the upper end of the output pipeline, and the lower end of the temperature control component is provided with a temperature control output pipeline 2 connected to the lower end of the output pipeline.

[0008] As a further improvement of the present invention, a support base is provided at the lower end of the bottom plate, and anti-slip stripes are provided on the bottom outer wall of the support base.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] First, by setting up infrared sensors, temperature changes can be quickly detected and the data can be transmitted to the control system in real time, thereby improving the response speed of temperature control.

[0011] Secondly, by setting up a monitoring device, the position of the sensor can be adjusted to monitor the temperature at different positions of the reaction chamber, obtain more comprehensive data, and help operators better understand the temperature distribution of the reaction chamber.

[0012] Third, by setting up a molten salt pump, the molten salt can be effectively circulated throughout the system, thereby enhancing the heat transfer process and ensuring that heat can be evenly transferred to the reactants.

[0013] Fourthly, a support base is provided at the lower end of the bottom plate, and anti-slip stripes are provided on the bottom outer wall of the support base. The support base provides good support for the bottom plate, greatly improving the stability of the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the monitoring device of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of point A of the present utility model;

[0018] Figure 4 It is a front view structural schematic diagram of the present utility model.

[0019] In the figure: 101, bottom plate; 102, furnace body; 103, reaction chamber; 104, support base; 201, slide; 202, threaded rod; 203, slider; 204, telescopic push rod; 205, infrared sensor; 206, motor; 207, bevel gear; 301, temperature control component; 302, molten salt radiator; 303, molten salt pump; 304, input pipeline; 305, output pipeline; 306, heat pipe; 307, temperature control input pipeline 2; 308, temperature control output pipeline 2; 309, pump outlet pipeline. DETAILED DESCRIPTION

[0020] To better understand the present invention, the following examples further illustrate the present invention. However, the present invention is not limited to the following examples. In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be practiced without one or more of these details.

[0021] like Figure 1 、 2 As shown in , 3, a molten salt temperature control device for the production of phthalic anhydride by the naphthalene process comprises a base plate 101, a furnace body 102 is provided in the upper middle part of the base plate 101, a reaction chamber 103 is provided inside the furnace body 102, a heat transfer pipeline is connected to the outer wall of the reaction chamber 103, a heat transfer component connected to the heat transfer pipeline is provided at the upper end of the base plate 101, and a monitoring device for monitoring the temperature of the reaction chamber 103 is provided inside the furnace body 102.

[0022] like Figure 1 、 2As shown in Figure 3, the monitoring device includes two chutes 201 arranged at the bottom of the furnace body 102, and threaded rods 202 are rotatably arranged inside the chutes 201. Slide blocks 203 are threadedly connected to the threaded rods 202. Telescopic push rods 204 are fixedly arranged on the upper ends of the slide blocks 203. The telescopic ends of the telescopic push rods 204 are commonly connected to infrared sensors 205. A driving member for driving the threaded rods 202 to rotate is provided inside the furnace body 102, and the driving member includes a motor 206 arranged at the left end of the rear chute 201. The output end of the motor 206 is connected to the threaded rod 202 at the rear end through a coupling. The ends of the two threaded rods 202 that are close to each other are It is connected to a bevel gear 207, and the two bevel gears 207 are meshed with each other. The motor 206 is started to drive the threaded rod 202 located inside the rear chute 201 to rotate. The rotation of the threaded rod 202 located at the rear side can rotate the bevel gear 207 connected thereto, and then the bevel gear 207 located at the left end rotates. The bevel gear 207 drives the threaded rod 202 connected thereto to rotate, and then the slider 203 moves back and forth along the chute 201 respectively. Then the telescopic push rod 204 is started respectively, and its telescopic end can drive the infrared sensor 205 to move up and down, and then the infrared sensor 205 can monitor the temperature at different positions of the reaction chamber 103 to obtain more comprehensive data.

[0023] like Figure 1 、 3 As shown, the heat transfer component includes a temperature control component 301 arranged at the left end of the bottom plate 101 and a molten salt radiator 302 arranged at the right end of the bottom plate 101. A molten salt pump 303 is arranged at the lower end of the bottom plate 101. The heat transfer pipeline includes an input pipeline 304 connected to the upper end of the molten salt radiator 302 and an output pipeline 305 connected to the left end of the molten salt pump 303, as well as a heat pipe 306 spirally wound around the side wall of the reaction chamber 103. The right end of the molten salt pump 303 is connected to the outlet of the reaction chamber 103. The pump pipeline 309 is connected to the lower end of the molten salt radiator 302. The upper end of the temperature control component 301 is provided with a temperature control input pipeline 2 307 connected to the upper end of the output pipeline 305. The lower end of the temperature control component 301 is provided with a temperature control output pipeline 2 308 connected to the lower end of the output pipeline 305. The temperature control component 301 is provided with a heating device inside, which can quickly input the high-temperature molten salt inside it into the output pipeline 305 to participate in the molten salt circulation, so as to achieve the temperature control effect.

[0024] like Figure 1 、 4 As shown, a support base 104 is provided at the lower end of the bottom plate 101 , and anti-slip stripes are provided on the bottom outer wall of the support base 104 .

[0025] When in use, the material to be reacted is placed inside the reaction chamber 103, and then the molten salt pump 303 is started to drive the molten salt to flow. The molten salt first passes through the output pipe 305 and the pump outlet pipe 309 into the molten salt radiator 302 to complete the cooling and heat dissipation effect. The molten salt after the temperature is reduced is sent back to the heat pipe 306 inside the furnace body 102 through the input pipe 304 to complete the circulation. During the reaction process, it is necessary to monitor the temperature of the reaction chamber 103, start the motor 206, and drive the threaded rod 202 located inside the rear chute 201 to rotate back and forth. The rotation of the threaded rod 202 located at the rear side can make the helical gear connected thereto The wheel 207 rotates, thereby rotating the bevel gear 207 at the left end, and the bevel gear 207 drives the threaded rod 202 connected thereto to rotate back and forth, thereby causing the slider 203 to move back and forth along the slide groove 201 respectively. Then, the telescopic push rod 204 is activated respectively, and its telescopic end can drive the infrared sensor 205 to move up and down, thereby enabling the infrared sensor 205 to monitor the temperature at different positions of the reaction chamber 103 and obtain more comprehensive data, so as to facilitate the staff to adjust the temperature of the circulating molten salt through the temperature control component 301 according to the temperature of the reaction chamber 103, so as to provide a suitable reaction chamber 103 environment and improve processing efficiency.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A molten salt temperature control device for producing phthalic anhydride by the naphthalene process, comprising a bottom plate (101), characterized in that: A furnace body (102) is provided in the middle portion above the bottom plate (101), a reaction chamber (103) is provided inside the furnace body (102), a heat transfer pipeline is connected to the outer wall of the reaction chamber (103), a heat transfer component connected to the heat transfer pipeline is provided at the upper end of the bottom plate (101), and a monitoring device for monitoring the temperature of the reaction chamber (103) is provided inside the furnace body (102).

2. The molten salt temperature control device in the production of phthalic anhydride by naphthalene process as claimed in claim 1, wherein: The monitoring device comprises two chutes (201) arranged at the bottom of the furnace body (102), threaded rods (202) are rotatably arranged inside the chutes (201), sliders (203) are threadedly connected to the threaded rods (202), telescopic push rods (204) are fixedly arranged at the upper ends of the sliders (203), and the telescopic ends of the telescopic push rods (204) are commonly connected to infrared sensors (205), and a driving member for driving the threaded rods (202) to rotate is arranged inside the furnace body (102).

3. The molten salt temperature control device in the production of phthalic anhydride by naphthalene process as claimed in claim 2, wherein: The driving member comprises a motor (206) arranged at the left end of the rear sliding groove (201); the output end of the motor (206) is connected to the threaded rod (202) at the rear end via a coupling; the adjacent ends of the two threaded rods (202) are both connected to a helical gear (207), and the two helical gears (207) are meshed with each other.

4. The molten salt temperature control device in the production of phthalic anhydride by naphthalene process as claimed in claim 1, wherein: The heat transfer component comprises a temperature control component (301) arranged at the left end of the bottom plate (101) and a molten salt radiator (302) arranged at the right end of the bottom plate (101); a molten salt pump (303) is arranged at the lower end of the bottom plate (101).

5. The molten salt temperature control device in the production of phthalic anhydride by naphthalene process as claimed in claim 4, wherein: The heat transfer pipeline includes an input pipeline (304) connected to the upper end of the molten salt radiator (302), an output pipeline (305) connected to the left end of the molten salt pump (303), and a heat conduction pipe (306) spirally wound around the side wall of the reaction chamber (103). The right end of the molten salt pump (303) is connected to the lower end of the molten salt radiator (302) through the pump outlet pipeline (309).

6. The molten salt temperature control device in the production of phthalic anhydride by naphthalene process as claimed in claim 5, characterized in that: The upper end of the temperature control component (301) is provided with a second temperature control input pipeline (307) connected to the upper end of the output pipeline (305), and the lower end of the temperature control component (301) is provided with a second temperature control output pipeline (308) connected to the lower end of the output pipeline (305).

7. The molten salt temperature control device in the production of phthalic anhydride by naphthalene process as claimed in claim 1, characterized in that: A support base (104) is provided at the lower end of the bottom plate (101), and anti-slip stripes are provided on the bottom outer wall of the support base (104).

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