High-temperature-resistant molten salt furnace

Abstract

The utility model discloses a high-temperature-resistant molten salt furnace which comprises a furnace body, a heating assembly, a first barrel and a ventilation and heat dissipation device. The top of the furnace body is open; the heating assembly is used for forming a high-temperature environment in the furnace body; the bottom of the first barrel is connected and communicated with a second barrel, and the tops of the first barrel and the second barrel are open; the ventilation and heat dissipation device comprises an air inducing assembly, an annular plate and a supporting block, the supporting block is installed at the opening position in the upper portion of the furnace body, the air inducing assembly is installed on the supporting block and penetrates through the supporting block to form a ventilation channel with the supporting block, the annular plate is installed on the supporting block and forms an interlayer with the supporting block, and the interior of the interlayer is used for adding adsorption materials. Air holes are formed in the annular plate and the supporting blocks; the utility model aims to solve the problem that in the prior art, when sodium hydroxide is purified by a molten salt furnace, harmful gas can be generated and is discharged into the atmosphere, so that the body health of workers is harmed.

Description

Technical Field

[0001] This utility model relates to the field of molten salt furnace technology, specifically to a high-temperature resistant molten salt furnace. Background Technology

[0002] Molten salt furnace is a high-temperature heating equipment technology that uses molten salt as a heat carrier. This technology heats powdered molten salt (such as a mixture of potassium nitrate, sodium nitrite and sodium nitrate, or potassium chloride, sodium chloride, sodium hydroxide, calcium chloride, lithium chloride, etc.) to above its melting point, allowing it to circulate in a molten flow state, thereby achieving efficient heating of materials in high-temperature heating production processes.

[0003] The background technology of melting sodium hydroxide crystals generated by sodium chloride electrolysis involves the following process: First, sodium chloride solution is electrolyzed, and the ions in the solution undergo a redox reaction at the electrode using the action of electric current to generate sodium hydroxide. Then, the generated sodium hydroxide is purified. One common method is melt crystallization, that is, the sodium hydroxide is melted into a liquid at high temperature, and then the temperature is gradually reduced to solidify it into a crystal with high purity. In the existing technology, when melting sodium hydroxide crystals, the molten salt furnace has poor air permeability, resulting in a continuous high temperature environment inside the molten salt furnace and poor heat resistance.

[0004] The utility model patent with application number CN202321675078.4 and publication number CN220038772U (hereinafter referred to as "Prior Art 1") discloses a high-temperature resistant open-type molten salt furnace, including a high-temperature resistant molten salt furnace body with a top opening, a filter plate provided on the top of the high-temperature resistant molten salt furnace body, multiple material inlets opened around the bottom of the high-temperature resistant molten salt furnace body, a lifting box that is slidably fitted to the outside of the high-temperature resistant molten salt furnace body, a sealing cover 1 that is slidably fitted to the bottom of the lifting box, a sealing cover 2 that is slidably fitted to the bottom of the high-temperature resistant molten salt furnace body, and an adjustment mechanism that drives the sealing cover 1 to move up and down at the bottom of the high-temperature resistant molten salt furnace body.

[0005] The specification of prior art 1 discloses a high-temperature resistant open-type molten salt furnace. In use, the molten salt at the bottom of the high-temperature resistant molten salt furnace body is raised to the top for heat exchange, so that the molten salt in the entire high-temperature resistant molten salt furnace body circulates and exchanges heat repeatedly. However, in actual application, harmful gases are generated during the melting of sodium hydroxide. These harmful gases are directly discharged into the atmosphere through the filter plate at the top opening, which will cause harm to the health of the workers. Summary of the Invention

[0006] This invention provides a high-temperature resistant molten salt furnace, which aims to solve the problem that existing molten salt furnaces produce harmful gases that are released into the atmosphere during the purification of sodium hydroxide, thereby endangering the health of workers.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A high-temperature molten salt furnace includes a furnace body, a heating component, a first cylinder, and a ventilation and heat dissipation device. The furnace body has an opening at the top. The heating component is used to create a high-temperature environment inside the furnace body. The bottom of the first cylinder is connected to and communicates with a second cylinder, and the top openings of the first and second cylinders are also present. The ventilation and heat dissipation device includes an air-guiding component, an annular plate, and a support block. The support block is installed at the opening above the furnace body. The air-guiding component is installed on the support block and passes through the support block to form a ventilation channel. The annular plate is installed on the support block and forms a sandwich layer with the support block. The sandwich layer is used to add adsorbent material. Both the annular plate and the support block are provided with vent holes.

[0009] Furthermore, a support ring is provided on the inner wall of the furnace body, and several heating components are installed on the support ring. The several heating components are used to surround the first cylinder and the second cylinder.

[0010] Furthermore, the support block is provided with several crisscrossing mounting beams, and the top of the mounting beams is provided with a cover plate. The cover plate and the crisscrossing mounting beams form an installation area. The ventilation holes are provided on the mounting beams. The furnace body communicates with the outside world in sequence through the ventilation duct, the ventilation holes on the annular plate, and the ventilation holes on the mounting beams.

[0011] Furthermore, a bracket is provided on the cover plate, and the air-guiding assembly is used to be mounted on the bracket.

[0012] Furthermore, a trapezoidal groove is provided on the end face of the support block near the furnace body, and the bottom of the induced draft assembly is located inside the trapezoidal groove.

[0013] Furthermore, the first cylinder has an annular structure with a liquid outlet at the bottom and a liquid inlet on the second cylinder. The liquid outlet and the liquid inlet are positioned correspondingly and connected to each other. The second cylinder has a liquid outlet end with a valve.

[0014] Furthermore, a filter screen is provided on the liquid outlet. The filter screen is used to block the solid medium inside the first cylinder and allow the liquid medium in the first cylinder to enter the second cylinder through the liquid inlet.

[0015] Furthermore, the bottom of the first cylinder is inclined, and the bottom of the first cylinder is inclined towards the liquid outlet. The liquid inlet is also inclined, and the liquid inlet is used to tilt into the second cylinder.

[0016] Furthermore, a bearing seat is provided on the cover plate, and the air intake assembly is used to rotate and seal with the cover plate through the bearing seat.

[0017] Furthermore, the support block is connected to the furnace body via connecting ribs.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model mainly includes a furnace body, a heating component, a first cylinder, and a ventilation and heat dissipation device. In actual use, the first cylinder is mainly used to hold sodium hydroxide crystals. The heating component is used to heat the inside of the furnace body to a temperature higher than the melting point of sodium hydroxide crystals. After the sodium hydroxide crystals in the first cylinder melt at high temperature, they become a fluid and enter the second cylinder. The second cylinder is mainly used to collect the molten sodium hydroxide liquid. During the melting of sodium hydroxide crystals, hot air and harmful gases are generated. In order to improve the heat resistance of the molten salt furnace, it is necessary to form good ventilation inside the furnace body. Thus, the hot air and harmful gases inside the furnace body are drawn in by the air-guiding component. The hot air and harmful gases enter the interlayer through the ventilation duct and the vent holes on the annular plate. The adsorbent material in the interlayer adsorbs the components of the harmful gases. Finally, the relatively pure gas is discharged to the atmosphere through the vent holes on the support block. The advantage of this design is that it can make the furnace body have good high temperature resistance while also adsorbing the harmful substances generated during the melting of sodium hydroxide crystals, reducing the harm to personnel in the working environment. Attached Figure Description

[0020] 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. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Figure 3 This utility model Figure 2 A magnified view of a portion of point A in the middle.

[0024] Figure 4 This utility model Figure 2 A magnified view of a section at point B in the middle.

[0025] In the diagram, 101-furnace body, 102-first cylinder, 103-second cylinder, 104-annular plate, 105-support block, 106-ventilation duct, 107-interlayer, 108-adsorbent material, 109-heating rod, 110-motor, 111-first impeller, 112-second impeller, 113-coupling, 114-shaft, 115-through hole, 116-support ring, 117-mounting beam, 118-cover plate, 119-installation area, 120-bracket, 121-trapezoidal groove, 122-liquid outlet, 123-liquid inlet, 124-filter screen, 125-bearing seat, 126-connecting rib, 127-ventilation hole. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of the present invention.

[0027] Please see Figures 1-4 As shown, this embodiment discloses a high-temperature molten salt furnace, including a furnace body 101, a heating component, a first cylinder 102, and a ventilation and heat dissipation device; the furnace body 101 has an opening at the top; the heating component is used to create a high-temperature environment inside the furnace body 101; the bottom of the first cylinder 102 is connected to and communicates with a second cylinder 103, and the tops of the first cylinder 102 and the second cylinder 103 are open; the ventilation and heat dissipation device includes an air-guiding component, an annular plate 104, and a support block 105. The support block 105 is installed at the opening above the furnace body 101, the air-guiding component is installed on the support block 105 and passes through the support block 105 to form a ventilation channel 106 with the support block 105, the annular plate 104 is installed on the support block 105 and forms a sandwich 107 with the support block 105, the sandwich 107 is used to add an adsorbent material 108, and both the annular plate 104 and the support block 105 are provided with vent holes 127.

[0028] This utility model mainly includes a furnace body 101, a heating assembly, a first cylinder 102, and a ventilation and heat dissipation device. In actual use, the first cylinder 102 is mainly used to hold sodium hydroxide crystals. The heating assembly is used to heat the inside of the furnace body 101 to a temperature higher than the melting point of the sodium hydroxide crystals. After the sodium hydroxide crystals in the first cylinder 102 melt at high temperature, they become a fluid and enter the second cylinder 103. The second cylinder 103 is mainly used to collect the molten sodium hydroxide liquid. During the melting of sodium hydroxide crystals, hot air and harmful gases are generated. In order to improve the heat resistance of the molten salt furnace, it is necessary to ensure that the inside of the furnace body 101... The furnace body 101 is well ventilated, and the hot air and harmful gases inside the furnace body 101 are drawn in by the air-drawing assembly. The hot air and harmful gases enter the interlayer 107 through the ventilation duct 106 and the vent holes 127 on the annular plate 104. The adsorbent material 108 in the interlayer 107 adsorbs the components of the harmful gases. Finally, the relatively pure gas is discharged to the atmosphere through the vent holes 127 on the support block 105. The advantage of this design is that the furnace body 101 has good high-temperature resistance, and it can also adsorb harmful substances generated during the molten sodium hydroxide crystal process, reducing the harm to personnel in the working environment.

[0029] As an optional implementation, in this embodiment, the adsorbent 108 is activated carbon, which is used to fill the interior of the interlayer 107.

[0030] It should be noted that in this embodiment, the pore size of the vent 127 is much smaller than the particle size of the activated carbon.

[0031] As an optional implementation, please refer to Figure 2 In this embodiment, the heating component consists of several heating rods 109, which are arranged in a ring array inside the furnace body 101. The ring of heating rods 109 surrounds the first cylinder 102. The heating rods 109 heat up the furnace body 101 to create a high-temperature environment. The combined heating of the heating rods 109 causes the temperature inside the furnace body 101 to exceed the melting point of sodium hydroxide crystals, thus melting the sodium hydroxide crystals inside the first cylinder 102.

[0032] It should be noted that in this embodiment, the heating rod 109 is existing technology. This embodiment does not involve any improvement to the structure of the heating rod 109. The heating rod 109 used in the prior art is a segmented stainless steel 110V 500W wire drawing machine heating rod 109, which will not be described in detail here.

[0033] As an optional implementation, please refer to Figure 2 as well as Figure 3As shown, in this embodiment, the adsorption assembly includes a motor 110, a first impeller 111, and a second impeller 112. The motor 110 is positioned above the support block 105. A rotating shaft 114 is connected to the output shaft of the motor 110 via a coupling 113. The rotating shaft 114 is rotatably connected to the support block 105. A through hole 115 is provided on the support block 105. A ventilation channel 106 is formed between the outer wall of the rotating shaft 114 and the interior of the through hole 115. The rotating shaft 114 is used to rotate within the ventilation channel 106. The first impeller 111 is fixedly installed at the tail of the rotating shaft 114, and the second impeller 112 is fixedly installed in the lower middle part of the rotating shaft 114 and located inside the annular plate 104. In use, when ventilation and heat dissipation are required inside the furnace body 101, the operator controls... The motor 110 rotates, which in turn drives the shaft 114 to rotate. The shaft 114 then drives the first impeller 111 and the second impeller 112 to rotate. After the first impeller 111 rotates, a negative pressure is formed inside the furnace body 101, which adsorbs the harmful gases generated by the hot airflow and molten sodium hydroxide crystals. At this time, the harmful gases generated by the hot airflow and molten sodium hydroxide crystals enter the ventilation duct 106. After the second impeller 112 rotates, it again adsorbs the harmful gases generated by the hot airflow and molten sodium hydroxide crystals under negative pressure. This allows the harmful gases generated by the hot airflow and molten sodium hydroxide crystals to pass through the vent holes 127 on the annular plate 104 and be adsorbed by the activated carbon. After the high-temperature gas comes into contact with the activated carbon, a porous structure is formed, which effectively adsorbs the harmful substances.

[0034] In some embodiments, please refer to Figure 2 As shown, the inner wall of the furnace body 101 is provided with a support ring 116, and several heating components are installed on the support ring 116. The several heating components are used to surround the first cylinder 102 and the second cylinder 103.

[0035] Please see Figure 2 As shown, in actual use, the support ring 116 is a ring-shaped stainless steel structure. There are several support rings 116, and all of them are fixedly installed on the inner wall of the furnace body 101. Each support ring 116 is provided with several heating rods 109. The main function of the support ring 116 is to install the heating rods 109.

[0036] In some embodiments, please refer to Figure 1 as well as Figure 2 As shown, a number of crisscrossing mounting beams 117 are provided on the support block 105. A cover plate 118 is provided on the top of the mounting beam 117. An installation area 119 is formed between the cover plate 118 and the crisscrossing mounting beams 117. The vent holes 127 are provided on the mounting beams 117. The furnace body 101 communicates with the outside world through the ventilation duct 106, the vent holes 127 on the annular plate 104 and the vent holes 127 on the mounting beams 117 in sequence.

[0037] As an optional implementation, in this embodiment, please refer to... Figure 1 as well as Figure 2 As shown, there are four mounting beams 117, arranged in pairs. Two of the mounting beams 117 are arranged perpendicularly and staggered with the other two to form a "well" structure. After the four mounting beams 117 are installed, they form the installation area 119 with the cover plate 118. Each of the four mounting beams 117 is provided with several ventilation holes 127, which are located in the installation area 119. The ventilation holes 127 on the four mounting beams 117 allow the installation area 119 to be connected to the outside atmosphere. Hot air and harmful gases formed after molten sodium hydroxide pass through the ventilation duct 106 and the interlayer 107 in sequence before entering the atmosphere. The purpose of this arrangement is to facilitate the installation of the cover plate 118 and to provide support for the rotating shaft 114. The rotating shaft 114 and the cover plate 118 rotate together to ensure the stability of the rotating shaft 114 during rotation.

[0038] In some embodiments, please refer to Figure 1 As shown, a bracket 120 is provided on the cover plate 118, and the air-guiding assembly is used to be installed on the bracket 120.

[0039] Please refer to the following in actual use: Figure 1 As shown, the fixed end of the motor 110 is mounted on the bracket 120, and the end of the bracket 120 is mounted on the mounting beam 117. The main purpose of setting up the bracket 120 is to install the motor 110.

[0040] In some embodiments, the support block 105 has a trapezoidal groove 121 on its end face near the furnace body 101, and the bottom of the air duct assembly is located inside the trapezoidal groove 121.

[0041] In actual use, the main purpose of setting the trapezoidal groove 121 is to make way for the installation of the first impeller 111. Furthermore, the top inner wall of the trapezoidal groove 121 has a conical structure, which makes it easier to guide hot air and harmful gases.

[0042] In some embodiments, the first cylinder 102 has an annular structure, the bottom of the first cylinder 102 has a liquid outlet 122, the second cylinder 103 is provided with a liquid inlet 123, the liquid outlet 122 and the liquid inlet 123 are positioned corresponding to each other and are connected to each other, the second cylinder 103 has a liquid outlet end, and a valve is provided in the liquid outlet end.

[0043] In actual use, the valve is initially closed. After the heating rod 109 heats the water, the sodium hydroxide crystals in the first cylinder 102 melt at high temperature and become fluid. They then pass through the outlet 122 and the inlet 123 and enter the second cylinder 103 for storage. Due to the high temperature environment inside the furnace 101, the molten sodium hydroxide in the second cylinder 103 remains in a fluid state. When the sodium hydroxide crystals inside the first cylinder 102 have completely melted, the valve is opened to collect the fluid sodium hydroxide for recrystallization and purification.

[0044] In some embodiments, please refer to Figure 4 As shown, a filter screen 124 is provided on the liquid outlet 122. The filter screen 124 is used to block the solid medium inside the first cylinder 102 and allow the liquid medium in the first cylinder 102 to enter the second cylinder 103 through the liquid inlet 123.

[0045] In actual use, the mesh size of the filter screen 124 is much smaller than the particle size of sodium hydroxide crystals. This can block the unmelted sodium hydroxide crystals and allow the fluid sodium hydroxide inside the first cylinder 102 to flow into the second cylinder 103.

[0046] In some embodiments, please refer to Figure 4 As shown, the bottom of the first cylinder 102 is inclined, and the bottom of the first cylinder 102 is inclined toward the liquid outlet 122. The liquid inlet 123 is also inclined and is used to tilt toward the inside of the second cylinder 103.

[0047] In actual use, the advantage of the inclined bottom of the first cylinder 102 is that it facilitates the flow of sodium hydroxide fluid, allowing the sodium hydroxide fluid to flow into the second cylinder 103 under gravity. Similarly, the outlet 122 and inlet 123 are also inclined to facilitate the flow of sodium hydroxide fluid into the second cylinder 103 under gravity.

[0048] In some embodiments, a bearing seat 125 is provided on the cover plate 118, and the air intake assembly is used to rotate and seal with the cover plate 118 through the bearing seat 125.

[0049] In actual use, the purpose of setting the bearing housing 125 is to reduce the friction between the rotating shaft 114 and the cover plate 118, so as to extend the service life of the bearing and the cover plate 118 and make the rotation of the rotating shaft 114 smoother.

[0050] In some embodiments, the support block 105 is connected to the furnace body 101 via a connecting rib 126.

[0051] In actual use, connecting ribs 126 are installed around the outer wall of the support block 105 by bolts. The inner wall shape of the connecting ribs 126 matches the outer wall shape of the support block 105. The cross-section of the connecting ribs 126 is an L-shaped structure. The connecting ribs 126 are also connected to the upper end face of the furnace body 101 by bolts, thereby fixing the support block 105 as a whole on the furnace body 101.

[0052] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant molten salt furnace, characterized in that... , include: Furnace body, with an opening at the top; A heating assembly, used to create a high-temperature environment inside the furnace body; A first cylindrical body, the bottom of which is connected to and communicates with a second cylindrical body, and the top openings of both the first and second cylindrical bodies; and A ventilation and heat dissipation device includes an air-guiding assembly, an annular plate, and a support block. The support block is installed at the opening above the furnace body. The air-guiding assembly is installed on the support block and passes through the support block to form a ventilation channel with the support block. The annular plate is installed on the support block and forms a sandwich with the support block. The sandwich is used to add adsorbent material. Both the annular plate and the support block are provided with air vents.

2. The high-temperature molten salt furnace according to claim 1, characterized in that: The inner wall of the furnace body is provided with a support ring, and several heating components are installed on the support ring. The heating components are used to surround the first cylinder and the second cylinder.

3. The high-temperature molten salt furnace according to claim 1, characterized in that: The support block is provided with several crisscrossing mounting beams, and the top of the mounting beams is provided with a cover plate. The cover plate and the crisscrossing mounting beams form an installation area. The vent holes are provided on the mounting beams. The furnace body communicates with the outside world in sequence through the ventilation duct, the vent holes on the annular plate and the vent holes on the mounting beams.

4. A high-temperature resistant molten salt furnace according to claim 3, characterized in that: A bracket is provided on the cover plate, and the air-guiding assembly is used to be installed on the bracket.

5. A high-temperature resistant molten salt furnace according to claim 1, characterized in that: The support block has a trapezoidal groove on its end face near the furnace body, and the bottom of the induced draft assembly is located inside the trapezoidal groove.

6. A high-temperature resistant molten salt furnace according to claim 1, characterized in that: The first cylinder has an annular structure with a liquid outlet at the bottom. The second cylinder has a liquid inlet, and the liquid outlet and liquid inlet are positioned correspondingly and connected to each other. The second cylinder has a liquid outlet end with a valve.

7. A high-temperature molten salt furnace according to claim 6, characterized in that: A filter screen is installed on the liquid outlet. The filter screen is used to block the solid medium inside the first cylinder and allow the liquid medium in the first cylinder to enter the second cylinder through the liquid inlet.

8. A high-temperature resistant molten salt furnace according to claim 6, characterized in that: The bottom of the first cylinder is inclined, and the bottom of the first cylinder is inclined towards the liquid outlet. The liquid inlet is also inclined and is used to tilt into the second cylinder.

9. A high-temperature molten salt furnace according to claim 1, characterized in that: The cover plate is equipped with a bearing seat, and the air intake assembly is used to rotate and seal with the cover plate through the bearing seat.

10. A high-temperature molten salt furnace according to claim 1, characterized in that: The support block is connected to the furnace body via connecting ribs.

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