Fused salt furnace

Abstract

The technical scheme of the present application provides a molten salt furnace, comprising: a furnace body for containing molten metal salt, the furnace body being open at the top; a heater arranged on the outer wall of the furnace body to heat the furnace body and its contents; a furnace cover movably arranged at the opening to open and close the opening. The molten salt furnace has a heater to heat the contents of the furnace body and a furnace cover arranged for the furnace body. The advantage is that the heater can maintain the temperature in the furnace body, so that the molten salt in the furnace body can maintain a stable temperature during the tempering process of up to several hours, and the application of the furnace cover also helps to improve the spatial consistency and time consistency of the molten salt temperature.

Description

Technical Field

[0001] This application relates to the field of molten salt heating technology, specifically to a molten salt furnace. Background Technology

[0002] Chemical tempering of glass involves placing the glass in a high-temperature molten potassium nitrate salt solution. The potassium ions in the molten potassium nitrate salt replace the larger sodium ions on the glass surface, creating a "clogged" effect that generates significant compressive stress, thus strengthening the glass. Since potassium nitrate has a melting point of around 330 degrees Celsius, a molten salt furnace is needed to maintain this melting temperature and continuously supply the tempering process. Utility Model Content

[0003] This application provides a molten salt furnace that can be maintained at a melting temperature and used for continuous tempering processes.

[0004] The molten salt furnace of this application includes:

[0005] A furnace chamber for holding molten metal salts, the furnace chamber having an opening at the top;

[0006] A heater, disposed on the outer wall of the furnace chamber to heat the furnace chamber and its contents;

[0007] A furnace cover, which is movably disposed at the opening to enable the opening to be opened and closed.

[0008] Preferably, it also includes a liquid extraction assembly, which includes a pump body placed inside the molten salt furnace and a pipe connecting the pump body and extending to the outside of the furnace chamber.

[0009] Preferably, the pump body is located at the bottom of the furnace chamber;

[0010] Alternatively, the bottom of the furnace liner has a recessed area, and the pump body is fixed within the recessed area.

[0011] Preferably, the pumping assembly further includes a power unit located outside the furnace chamber, and the power unit drives the pump body to operate through a transmission mechanism;

[0012] Alternatively, an installation platform is formed on the upper surface of the furnace shell, and a power device is installed on the outer surface of the installation platform. The power device drives the pump body to operate through a drive shaft passing through the installation platform.

[0013] Alternatively, the pipe may have an insulation layer formed on the outer wall of the furnace.

[0014] Preferably, the furnace cover is rotatably disposed at the opening of the furnace shell, and the furnace cover is driven to rotate by at least one telescopic component. One end of the telescopic component is rotatably connected to the furnace cover at a point offset from the rotation axis of the furnace cover, and the other end of the telescopic component is rotatably connected relative to the furnace shell.

[0015] Preferably, one set of the telescopic assembly is provided on each side of the furnace cover along the direction of rotation axis.

[0016] Preferably, the heater is disposed on the side wall and / or bottom wall of the furnace chamber.

[0017] Preferably, the heater is disposed on the side wall of the furnace chamber; the heater is distributed circumferentially on the side wall of the furnace chamber.

[0018] Preferably, it includes a protective layer surrounding the sidewall of the furnace chamber, with the heater enclosed inside the protective layer;

[0019] Preferably, the protective layer and the heater are spaced apart;

[0020] Preferably, the protective layer has heat dissipation holes.

[0021] Preferably, it includes supporting feet disposed at the bottom of the molten salt furnace;

[0022] Preferably, the height of the supporting feet is adjustable;

[0023] Preferably, the system includes movable casters disposed at the bottom of the molten salt furnace; the ground contact height of the movable casters is between the highest and lowest points of the adjustable height of the supporting feet.

[0024] Preferably, it also includes an electrical control box located on the side, the electrical control box having a control panel and indicator lights.

[0025] The molten salt furnace of this application has a heater for heating the contents of the furnace chamber and a furnace cover for the furnace chamber. Its advantage is that the temperature inside the furnace chamber can be maintained by the heater, so that the molten salt inside the furnace chamber can maintain a stable temperature during the tempering process that lasts for several hours. At the same time, the application of the furnace cover also helps to improve the spatial and temporal consistency of the molten salt temperature. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of the molten salt furnace of this application;

[0027] Figure 2 This is a partial cross-sectional schematic diagram of the molten salt furnace of this application.

[0028] In the picture:

[0029] 1: Molten salt furnace; 11: Furnace chamber; 111: Recessed area; 112: Mounting platform; 113: Support feet; 114: Casters; 12: Heater; 121: Heating element; 122: Protective layer; 123: Heat dissipation hole; 13: Furnace cover; 131: Telescopic component; 14: Liquid pumping component; 141: Power unit; 142: Pump body; 143: Pipeline; 15: Electrical control box; 151: Control panel; 152: Indicator light. Detailed Implementation

[0030] The technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. In this specification, the dimensions of the drawings do not represent the actual size ratio. The drawings are only used to illustrate the relative positional relationship and connection relationship between the components. Components with the same name or the same reference numeral represent similar or the same structure, and are limited to illustrative purposes.

[0031] Figure 1 This is an overall schematic diagram of the molten salt furnace of this application. Figure 2 This is a partial cross-sectional schematic diagram of the molten salt furnace of this application. The molten salt furnace 1 has a furnace chamber 11 for holding molten potassium nitrate salt. Several heaters 12 are installed on the outer wall of the furnace chamber 11 to heat the furnace chamber 11 and the potassium nitrate therein. The furnace chamber 11 has an opening at the top; in the embodiments, the opening may be formed on the upper surface of the furnace chamber 11 or on the upper side of the furnace chamber 11. The molten salt furnace 1 has a movable furnace lid 13. When the furnace lid 13 is open, the feeding operation and the addition and removal of tempered glass can be completed. The furnace lid 13 is preferably heat-insulated and has a sandwich structure. During the heating, heat preservation, and tempering processes, the furnace lid 13 is generally closed to facilitate the maintenance of the furnace temperature and prevent the evaporation of molten potassium nitrate. Furthermore, when the furnace chamber 11 is closed, the heat of the upper layer of molten salt is not easily lost; therefore, the furnace lid 13 also helps to improve the spatial uniformity of the molten salt temperature within the furnace chamber 11.

[0032] The furnace cover 13 is rotatably mounted at the opening above the furnace chamber 11. When rotated to fit the opening of the furnace chamber 11, the furnace chamber 11 is closed; conversely, after rotation, the furnace chamber 11 is opened. The furnace cover 13 is driven to rotate by at least one telescopic component 131. One end of the telescopic component 131 is rotatably connected to the furnace cover 13 at a position offset from the rotation axis of the furnace cover 13. The other end of the telescopic component 131 is rotatably connected relative to the furnace chamber 11. When the telescopic component 131 is controlled to extend or retract, the furnace cover 13 rotates accordingly by a certain angle, thereby opening and closing the furnace chamber 11. As shown in the figure, the telescopic component 131 is preferably provided on both the left and right sides of the furnace cover 13 along the direction of rotation axis, and it can be an electrically driven telescopic support rod.

[0033] Heaters 12 are installed on the outer wall of the furnace chamber 11, preferably on the side walls and / or bottom wall of the furnace chamber 11. Heaters 12 can be distributed circumferentially on the side walls of the furnace chamber 11. As shown in the figure, the furnace chamber 11 has a rectangular horizontal cross-section, and heaters 12 are preferably arranged on the four side walls around the furnace chamber 11 to ensure sufficient heat power and also to facilitate uniform heating of the potassium nitrate solid inside the furnace chamber 11. The furnace chamber 11 can also have other shapes, such as a circular horizontal cross-section. In this case, heaters 12 can still be distributed on the circumferential side walls of the furnace chamber 11 to achieve the same heating purpose. Heaters 12 can also be located on the bottom wall of the furnace chamber 11. Heaters 12 can be heating tubes 121 with resistance wire heating. Heating tubes 121 can be arranged sequentially on the side walls of the furnace chamber 11. In the case of a rectangular cross-section, one set can be installed on the outside of each side wall, that is, four sets of heating tubes 121 can be arranged around the circumference of the furnace chamber 11. Similarly, multiple sets of heating tubes 121 can be arranged on the outer bottom of the furnace chamber 11, such as six sets.

[0034] Preferably, the molten salt furnace 1 has a protective layer 122 surrounding the sidewall of the furnace chamber 11, and the heater 12 is enclosed inside the protective layer 122. The protective layer 122 is preferably spaced a certain distance from the heater 12, so that there is no direct thermal interaction between the heater 12 and the protective layer 122. In this case, there is no direct heat transfer between the heating element 121 and the heater 12. The air layer between them is a poor conductor of heat, thus achieving heat insulation and improving the thermal efficiency of the molten salt furnace 1. Furthermore, it is also preferable to have heat dissipation holes 123 on the protective layer 122, allowing the hot air around the heater 12 to quickly flow out of the area between the heater 12 and the protective layer 122, ensuring that the temperature rise of the protective layer 122 and the air around it is limited.

[0035] After the potassium nitrate molten salt undergoes displacement during the tempering process, the potassium ion concentration decreases. At this point, in addition to replenishing potassium nitrate, it is also necessary to first extract a portion of the molten salt. For this reason, the molten salt furnace 1 also includes a pumping assembly 14 for molten salt extraction. The pumping assembly 14 has a pump body 142 disposed inside the furnace chamber 11 and a pipe 143 connecting the pump body 142 and extending to the outside of the furnace chamber 11. In the molten salt state, the pump body 142 can pump the molten salt through the pipe 143 to the outside and collect it through other devices. The pump body 142 is preferably disposed at the bottom of the furnace chamber 11. This obviously allows for the complete extraction of molten salt from the furnace chamber 11 to the outside when necessary. Furthermore, the inner bottom of the furnace chamber 11 also has a deliberately designed recessed area 111, in which the pump body 142 is fixed, the purpose of which is still to ensure complete extraction of molten salt from the furnace chamber 11 when necessary.

[0036] Considering the harsh environment inside the furnace 11, the power unit 141 of the pumping assembly 14 is located outside the furnace 11. Specifically, Figure 2 An embodiment is provided. The upper surface of the furnace chamber 11 has a mounting platform 112, on which a fixed power unit 141 is mounted. The power unit 141 drives the pumping mechanism in the pump body 142 to rotate via a drive shaft passing through the mounting platform 112. In this embodiment, the mounting platform 112 and the furnace cover 13 are arranged on the same upper surface of the furnace chamber 11. Preferably, to prevent the molten salt from clogging the pipe 143 after solidification, an insulation layer is preferably wrapped around the outer wall of the pipe 143 exposed to the outside of the furnace chamber 11.

[0037] The molten salt furnace 1 also includes several support feet 113 fixedly installed at the bottom. There can be four sets of support feet 113, located at the four edges of the bottom of the molten salt furnace 1. Preferably, the support height of the support feet 113 is adjustable to achieve leveling between the multiple sets of support feet 113. Furthermore, casters 114 can be installed at the bottom of the molten salt furnace 1. The positions of the casters 114 can correspond to the four bottom edges of the support feet 113. The ground contact height of the casters 114 is between the highest and lowest points of the adjustable support height of the support feet 113. Thus, by lowering the support height of the casters 114, the support feet 113 can be grounded, achieving rolling supported by the support feet 113. After positioning, the casters 114 can be raised to lift the support feet 113 off the ground.

[0038] The molten salt furnace 1 also includes an electrical control box 15 located on the side, which has a control panel 151 and indicator lights 152. Since the electrical control box 15 is electrically connected to the heater 121, the telescopic assembly 131 and the power unit 141, the operator can control the operation of each part of the molten salt furnace 1 on the control panel 151.

[0039] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. A molten salt furnace characterized by, include: A furnace liner (11) for holding molten metal salts, the furnace liner (11) having an opening at the top; A heater (12) is disposed on the outer wall of the furnace chamber (11) to heat the furnace chamber (11) and its contents; A furnace cover (13) is movably disposed at the opening to enable the opening to be opened and closed; It also includes a liquid pumping assembly (14), which includes a pump body (142) placed inside the molten salt furnace (1) and a pipe (143) connecting the pump body (142) and extending to the outside of the furnace chamber (11).

2. The molten salt furnace as described in claim 1, characterized in that, The pump body (142) is located at the bottom of the furnace liner (11); Alternatively, the bottom of the furnace liner (11) has a recessed area (111), and the pump body (142) is fixed in the recessed area (111).

3. The molten salt furnace as described in claim 1, characterized in that, The liquid pumping assembly (14) also includes a power unit (141), which is located outside the furnace shell (11). The power unit (141) drives the pump body (142) to operate through a transmission mechanism. Alternatively, an installation platform (112) is formed on the upper surface of the furnace shell (11), and a power device (141) is installed on the outer surface of the installation platform (112). The power device (141) drives the pump body (142) to run through a transmission shaft passing through the installation platform (112). Alternatively, the pipe (143) may have an insulation layer formed on the outer wall of the furnace (11) exposed to the outside.

4. The molten salt furnace as described in claim 1, characterized in that, The furnace cover (13) is rotatably disposed at the opening of the furnace shell (11). The furnace cover (13) is driven to rotate by at least one telescopic component (131). One end of the telescopic component (131) is rotatably connected to the furnace cover (13) at a point off the rotation axis of the furnace cover (13), and the other end of the telescopic component (131) is rotatably connected relative to the furnace shell (11). The telescopic assembly (131) is provided on each side of the furnace cover (13) along the direction of rotation axis.

5. The molten salt furnace as described in claim 1, characterized in that, The heater (12) is disposed on the side wall and / or bottom wall of the furnace (11).

6. The molten salt furnace as described in claim 1, characterized in that, If the heater (12) is disposed on the side wall of the furnace (11); the heater (12) is distributed circumferentially on the side wall of the furnace (11).

7. The molten salt furnace as described in claim 6, characterized in that, Includes a protective layer (122) surrounding the sidewall of the furnace chamber (11), and the heater (12) is surrounded inside the protective layer (122); The protective layer (122) is spaced apart from the heater (12); The protective layer (122) has heat dissipation holes (123).

8. The molten salt furnace according to any one of claims 1-7, characterized in that, Including the supporting feet (113) installed at the bottom of the molten salt furnace (1); The height of the supporting feet (113) is adjustable; Includes movable casters (114) installed at the bottom of the molten salt furnace (1); the grounding height of the movable casters (114) is between the highest and lowest points of the adjustable height of the supporting feet (113).

9. The molten salt furnace according to any one of claims 1-7, characterized in that, It also includes an electrical control box (15) located on the side, which has a control panel (151) and indicator lights (152).

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