Used in heating devices for sodium monofluorophosphate furnace wires

Abstract

This utility model provides a heating device for sodium monofluorophosphate furnace wires, including a heating jacket, an outer steel sleeve, an inner reaction cylinder, a spiral groove on the heating jacket, and a heating wire embedded in the spiral groove. Multiple fixing plates are provided on the outer wall of the heating jacket. When the heating wire undergoes prolonged operation and experiences high-temperature softening and thermal expansion, the spacing of the spiral ring plates prevents the heating wires from piling up and forming a short circuit, thus avoiding equipment damage and project delays caused by short circuits. It also prevents the occurrence of electrical sparks, leakage risks, and threats to operator safety.

Description

Technical Field

[0001] This utility model relates to the field of sodium monofluorophosphate production, and in particular to a heating device for sodium monofluorophosphate furnace wires. Background Technology

[0002] The production process of sodium monofluorophosphate involves feeding food additives sodium hexametaphosphate, phosphorus pentoxide, and sodium fluoride into a feeding hopper in a specified ratio. After being mixed evenly in a mixer, the mixture is fed into a graphite reactor through a feeding auger. The reactor is heated by an electric heating wire and, at the required process temperature, the sodium monofluorophosphate produced by the reaction enters the conveying hopper.

[0003] The existing technology for producing sodium monofluorophosphate involves winding heating wires around the surface of a graphite reactor. However, during the high-temperature production process of sodium monofluorophosphate, the heating wires operate at temperatures between 800-1200℃. The prolonged high-temperature operation of these heating wires, without external support, leads to thermal expansion and softening. This softening causes structural instability, resulting in the accumulation of heating wires wound around the graphite reactor surface, creating short circuits and causing losses. Furthermore, it may trigger electrical sparks, posing a risk of electric leakage and threatening the safety of operators. Utility Model Content

[0004] This invention provides a heating device for sodium monofluorophosphate furnace wires, which solves the problem that during the high-temperature generation process of sodium monofluorophosphate, the heating furnace wires operate at high temperatures for a long time without external support, leading to thermal expansion and softening of the heating furnace wires, causing them to pile up, form short circuits, and result in losses.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a heating device for sodium monofluorophosphate furnace wire, including a heating jacket, a steel sleeve on the outside of the heating jacket, a reaction cylinder inside the heating jacket, a spiral groove on the heating jacket, a heating wire on the heating jacket, the heating wire being embedded in the spiral groove of the heating jacket, and multiple fixing plates on the outer wall of the heating jacket.

[0006] In a preferred embodiment, the heating jacket includes a cylindrical body, a top ring at the top of the cylindrical body, and a through hole and a plurality of first lifting lugs on the top ring.

[0007] In the preferred embodiment, the outer wall of the cylinder is provided with multiple grooves, and the two ends of the grooves are provided with flat-bottomed holes through which the heating wires pass.

[0008] In the preferred embodiment, the bottom of the cylinder is provided with a rotation hole.

[0009] In a preferred embodiment, the reaction cylinder includes a cylinder with a second top ring at the top, and the second top ring has a second lifting lug and multiple notches.

[0010] In a preferred embodiment, a material inlet is provided at the bottom of the cylinder, and a rotary unloader is provided at the bottom of the material inlet. One end of the rotary unloader is installed on the rotating hole of the cylinder.

[0011] In the preferred embodiment, the fixing plate includes an arc-shaped plate with multiple inclined plates. The two inclined plates at the ends are provided with mounting holes, and the arc-shaped plate abuts against the groove.

[0012] In the preferred embodiment, the mounting hole is equipped with a bolt, which passes through the mounting hole and the flat-bottomed hole, and the heating element is located between two adjacent inclined plates.

[0013] In the preferred embodiment, a heat insulation layer is provided between the heating jacket and the reaction cylinder.

[0014] The beneficial effects of this invention are as follows: When the entire device needs to produce sodium monofluorophosphate, the heating wire is wound around the spiral groove of the heating jacket, with one end of the heating wire passing through a through hole. Multiple fixing plates are provided on the outer wall of the heating jacket, and these fixing plates are bolted to the heating jacket so that the heating wire passes between two inclined plates of the fixing plate, thus securing the heating wire. This avoids difficulties in threading the heating wire during installation and prevents the heating wire from falling off the spiral groove of the heating jacket. Simultaneously, the fixing plate at the bottom of the heating jacket secures the tail end of the heating wire to the heating jacket.

[0015] A heat insulation layer is wrapped around the surface of the reaction cylinder. A heating jacket is installed inside a steel sleeve by a crane. The reaction cylinder is then installed inside the heating jacket. Raw materials are transported into the reaction cylinder by a conveyor for heating. Once heating is complete, a rotary unloader is driven to discharge the material from the entire device.

[0016] When the heating wires have been working for a long time, they will soften and expand due to high temperature. Because the heating wires are located in the spiral groove, the spacing of the spiral ring plates prevents the heating wires from piling up and forming a short circuit. This avoids equipment damage and project delays caused by short circuits, and also avoids the occurrence of electric sparks, leakage risks, and threats to the safety of operators. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is a utility model Figure 2 A magnified view of A in the middle; Figure 4 This is a utility model Figure 2 A magnified view of B in the middle; Figure 5 This is an axial view of the heating sleeve of this utility model; Figure 6 This is a utility model Figure 5 A magnified view of C; Figure 7 This is an axonometric view of the fixing plate of this utility model; Figure 8 This is a sectional view of the overall structure of this utility model; Figure 9 This is a utility model Figure 8 A magnified view of D; In the figure: 1. Steel sleeve; 2. Heating jacket; 201. Cylinder body; 202. Spiral groove; 203. Spiral ring plate; 204. Top ring; 205. Groove body; 206. Flat bottom hole; 207. First lifting lug; 208. Through hole; 3. Reaction cylinder; 301. Cylinder; 302. Second top ring; 303. Notch; 304. Second lifting lug; 4. Fixing plate; 401. Arc plate; 402. Inclined plate; 403. Mounting hole; 5. Heating wire; 6. Thermal insulation layer; 7. Rotary unloader. Detailed Implementation

[0018] Example 1: like Figure 1-9 The heating device for sodium monofluorophosphate includes a heating jacket 2, an outer steel sleeve 1, and an inner reaction cylinder 3. The heating jacket 2 has a spiral groove 202 and a heating wire 5 embedded in the spiral groove 202. Multiple fixing plates 4 are located on the outer wall of the heating jacket 2. With this structure, when the entire device needs to produce sodium monofluorophosphate, the heating wire 5 is wound around the spiral groove 202 of the heating jacket 2, with one end of the heating wire 5 passing through a through hole 208. The fixing plates 4 are bolted to the heating jacket 2 so that the heating wire 5 passes between two inclined plates 402 of the fixing plate 4, thus securing the heating wire 5. To avoid the difficulty in threading the heating wire 5 during installation, and to prevent the heating wire 5 from falling off the spiral groove 202 of the heating sleeve 2, the fixing plate 4 at the bottom of the heating sleeve 2 is used to fix the tail end of the heating wire 5 to the heating sleeve 2.

[0019] A heat insulation layer 6 is wrapped around the surface of the reaction cylinder 3. The heating jacket 2 is installed inside the steel sleeve 1 by a crane. The reaction cylinder 3 is installed inside the heating jacket 2. The raw materials are transported into the reaction cylinder 3 by a conveyor for heating. After heating is completed, the rotary unloader 7 is driven to output the material from the entire device.

[0020] When the heating wire 5 has been working for a long time, it will soften and expand due to high temperature. Because the heating wire 5 is located in the spiral groove 202, the spacing of the spiral ring plate 203 will prevent the heating wire 5 from piling up and forming a short circuit. This will avoid equipment damage and project delays caused by short circuits, as well as prevent the occurrence of electric sparks, leakage risks, and threats to the safety of operators.

[0021] In a preferred embodiment, the heating jacket 2 includes a cylindrical body 201, with a top ring 204 at the top. The top ring 204 has a through hole 208 and multiple first lifting lugs 207. With this structure, the first lifting lugs 207 are used by a crane to lift the heating jacket 2 into the steel sleeve 1. When the heating wire 5 has been in operation for a long time, and the heating wire 5 experiences high-temperature softening and thermal expansion, the heating wire 5, located within the spiral groove 202, avoids accumulation due to the spacing of the spiral ring plates 203, thus preventing short circuits and avoiding equipment damage and project delays caused by short circuits. It also prevents the occurrence of electrical sparks, leakage risks, and threats to operator safety.

[0022] In a preferred embodiment, the outer wall of the cylinder 201 is provided with multiple grooves 205, and both ends of the grooves 205 are provided with flat-bottomed holes 206, through which the heating wire 5 passes. With this structure, one end of the heating wire 5 passes through the through hole 208, and the heating wire 5 is connected to a power source via a plug. The spiral grooves 202 on the cylinder 201 form a spiral ring plate 203, which serves as a spacer for the heating wires 5 to prevent adjacent heating wires 5 from piling up and forming a short circuit.

[0023] In a preferred embodiment, the bottom of the cylinder 201 is provided with a rotating hole. With this structure, the bottom of the cylinder 201 has a rotating hole so that one end of the rotary unloader 7 is located within the rotating hole of the cylinder 201, facilitating material output.

[0024] In a preferred embodiment, the reaction cylinder 3 includes a cylinder 301, with a second top ring 302 at the top of the cylinder 301. The second top ring 302 has a second lifting lug 304 and multiple notches 303. With this structure, the reaction cylinder 3 is a graphite structure, allowing the heat from the heating wire 5 to be transferred into the reaction cylinder 3, enabling sodium hexametaphosphate, phosphorus pentoxide, and sodium fluoride to generate sodium monofluorophosphate under high temperature.

[0025] In a preferred embodiment, the bottom of the cylinder 301 is provided with a feeding port, and the bottom of the feeding port is provided with a rotary unloader 7. One end of the rotary unloader 7 is installed on the mounting hole of the cylinder 201.

[0026] In a preferred embodiment, the fixing plate 4 includes an arc-shaped plate 401 with multiple inclined plates 402. Two inclined plates 402 at the ends have mounting holes 403. The arc-shaped plate 401 abuts against the groove 205. With this structure, multiple fixing plates 4 are provided on the outer wall of the heating sleeve 2. The fixing plates 4 are bolted to the heating sleeve 2, allowing the heating wire 5 to pass between the two inclined plates 402 of the fixing plate 4, thus securing the heating wire 5. This avoids difficulties in threading the heating wire 5 during installation and prevents the heating wire 5 from falling off the spiral groove 202 of the heating sleeve 2. Simultaneously, the fixing plate 4 at the bottom of the heating sleeve 2 secures the tail end of the heating wire 5 to the heating sleeve 2.

[0027] In the preferred embodiment, a bolt is provided on the mounting hole 403, the bolt passes through the mounting hole 403 and the flat bottom hole 206, and the heating wire 5 is located between two adjacent inclined plates 402.

[0028] In a preferred embodiment, a thermal insulation layer 6 is provided between the heating jacket 2 and the reaction cylinder 3. With this structure, the thermal insulation layer 6 is made of aluminum silicate cotton. Aluminum silicate cotton itself has a low thermal conductivity, and its numerous tiny pores effectively block air convection and heat radiation, thereby achieving excellent thermal insulation performance.

[0029] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A furnace wire heating device for sodium monofluorophosphate, characterized by: It includes a heating jacket (2), a steel sleeve (1) on the outside of the heating jacket (2), a reaction cylinder (3) inside the heating jacket (2), a spiral groove (202) on the heating jacket (2), a heating wire (5) on the heating jacket (2), the heating wire (5) is embedded in the spiral groove (202) of the heating jacket (2), and multiple fixing plates (4) on the outer wall of the heating jacket (2).

2. The furnace wire heating device for sodium monofluorophosphate according to claim 1, characterized by: The heating jacket (2) includes a cylindrical body (201), and a top ring (204) is provided on the top of the cylindrical body (201). The top ring (204) is provided with a through hole (208) and a plurality of first lifting lugs (207).

3. The furnace wire heating device for sodium monofluorophosphate according to claim 2, characterized by: Multiple grooves (205) are provided on the outer wall of the cylinder (201). Flat bottom holes (206) are provided at both ends of the grooves (205), and the heating wires (5) pass through the through holes (208).

4. The furnace wire heating device for sodium monofluorophosphate according to claim 2, characterized by: The bottom of the cylinder (201) is provided with a rotation hole.

5. The furnace wire heating apparatus for sodium monofluorophosphate according to claim 1, wherein: The reaction cylinder (3) includes a cylinder (301), the top of the cylinder (301) is provided with a second top ring (302), the second top ring (302) is provided with a second lifting lug (304) and multiple notches (303).

6. The furnace wire heating apparatus for sodium monofluorophosphate according to claim 5, wherein: The bottom of the cylinder (301) is provided with a feeding port, and the bottom of the feeding port is provided with a rotary unloader (7). One end of the rotary unloader (7) is installed on the rotating hole of the cylinder (201).

7. The furnace wire heating apparatus for sodium monofluorophosphate according to claim 1, wherein: The fixing plate (4) includes an arc plate (401), on which multiple inclined plates (402) are provided. The two inclined plates (402) at the ends are provided with mounting holes (403). The arc plate (401) abuts against the groove (205).

8. The furnace wire heating apparatus for sodium monofluorophosphate according to claim 7, wherein: Bolts are provided on the mounting hole (403), and the bolts pass through the mounting hole (403) and the flat bottom hole (206). The heating wire (5) is located between two adjacent inclined plates (402).

9. The furnace wire heating apparatus for sodium monofluorophosphate according to claim 1, wherein: A heat insulation layer (6) is provided between the heating jacket (2) and the reaction cylinder (3).

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