Double-line adjustable sodium monofluorophosphate heating reactor

Abstract

According to the technical scheme, the sodium monofluorophosphate double-line adjustable heating reactor comprises a graphite reactor, a silicon carbide layer is wrapped outside the graphite reactor, a groove is formed in the silicon carbide layer, a first resistance wire and a second resistance wire are arranged in the groove, and a heat preservation layer is arranged on the surface of the silicon carbide layer. The reactor has the beneficial effects that (1) the groove of the reactor is deepened, the risk that the resistance wire falls off at high temperature is reduced, and the heating efficiency can be improved; (2) a resistance wire controlled in parallel by double wires is adopted, the graphite reactor is subjected to two-stage heating according to the production condition, and the reaction temperature is remotely controlled and adjusted by a control system, so that the temperatures of reaction areas at the upper end and the lower end are accurately controlled, the reaction mechanism of sodium monofluorophosphate in the graphite reactor is better met, and the stable product quality is ensured; and (3) the size of the graphite reactor is enlarged, the effective reaction volume is improved, and the productivity of a single device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium monofluorophosphate production, in particular to a sodium monofluorophosphate double-line adjustable heating reactor. Background Art

[0002] Sodium monofluorophosphate is widely used as an anti-caries agent and tooth desensitizer. It can also be used to clean metal surfaces and as a flux. It can also be used to manufacture specialty glass and is also used as a bactericide and preservative. Currently, the sodium monofluorophosphate industry is generally plagued by large and small production facilities. The insufficient production capacity of individual units is a bottleneck issue in the industry. Furthermore, product quality has been consistently flawed, and production facilities have a high failure rate and low automation level, leaving significant room for improvement. The sodium monofluorophosphate industry is generally plagued by high graphite reactor failure rates, low thermal efficiency, severely insufficient automation levels, unstable product quality, and low production capacity per unit. Summary of the Invention

[0003] In response to the problems in the above-mentioned prior art, the utility model provides a sodium monofluorophosphate dual-wire adjustable heating reactor, whose technical solution is: it includes a graphite reactor, the graphite reactor is covered with a silicon carbide layer, a groove is opened on the silicon carbide layer, a first resistance wire and a second resistance wire are arranged in the groove, and an insulation layer is arranged on the surface of the silicon carbide layer.

[0004] As a preferred solution, the first resistance wire and the second resistance wire are arranged in parallel and are individually controlled by a control system.

[0005] As a preferred solution, the depth of the groove is 7-12 mm.

[0006] As a preferred embodiment, the size of the graphite reactor is greater than or equal to φ160mm×900mm, the effective size is greater than or equal to φ160mm×800mm, and the effective reaction volume is greater than or equal to 16.1L.

[0007] As a preferred solution, a shell layer is provided on the surface of the thermal insulation layer.

[0008] As a preferred solution, the groove is a spiral structure.

[0009] Beneficial effects of the utility model:

[0010] (1) Deepening the groove of the reactor can reduce the risk of the resistance wire falling off at high temperatures and improve heating efficiency;

[0011] (2) Using a double-wire parallel controlled resistance wire, the graphite reactor is heated in two stages according to the production situation. The reaction temperature is adjusted by remote control of the control system to achieve precise control of the temperature of the upper and lower reaction zones, which better meets the reaction mechanism of sodium monofluorophosphate in the graphite reactor and ensures stable product quality.

[0012] (3) The size of the graphite reactor was expanded, the effective reaction volume was increased, and the production capacity of a single device was increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] In the figure: 1. Graphite reactor; 2. Silicon carbide layer; 3. Groove; 4. First resistance wire; 5. Second resistance wire; 6. Insulation layer; 7. Shell layer; 8. Control system. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below based on the accompanying drawings and specific embodiments.

[0016] Example

[0017] like Figure 1 The shown sodium monofluorophosphate dual-wire adjustable heating reactor includes a graphite reactor 1, which is covered with a silicon carbide layer 2. A groove 3 is opened on the silicon carbide layer 2, and a first resistance wire 4 and a second resistance wire 5 are arranged in the groove 3. An insulation layer 6 is arranged on the surface of the silicon carbide layer 2, and the insulation layer 6 is preferably aluminum silicate insulation cotton.

[0018] Furthermore, the first resistance wire 4 and the second resistance wire 5 are arranged in parallel and are individually controlled by the control system 8, so that the upper and lower sections of the graphite reactor 1 can be heated separately, and the reaction temperature in the reactor can be adjusted more accurately.

[0019] Furthermore, the depth of the groove 3 is 7-12 mm, which increases the depth of the groove 3, prevents the resistance wire from falling off, and improves the heating efficiency of the resistance wire.

[0020] Furthermore, the size of the graphite reactor 1 is greater than or equal to φ160mm×900mm, the effective size is greater than or equal to φ160mm×800mm, and its effective reaction volume is greater than or equal to 16.1L. Compared with the original graphite reactor, the reaction volume is increased and the production capacity of a single device is improved.

[0021] Furthermore, a shell layer 7 is provided on the surface of the thermal insulation layer 6, and the shell layer 7 protects the thermal insulation layer 6 to prevent the thermal insulation layer 6 from being scratched or punctured. The shell layer 7 is preferably made of stainless steel.

[0022] Furthermore, the groove 3 is a spiral structure, which is convenient for installing and fixing the resistance wire.

[0023] The above-mentioned reactor is used, and its operation process is as follows: when using the graphite reactor 1 to produce sodium monofluorophosphate, the current of the first resistance wire 4 and the second resistance wire 5 is separately adjusted by the control system 8 according to the production situation, so that the heating temperatures of the upper and lower parts of the graphite reactor 1 are different, meeting the special temperature requirements of sodium monofluorophosphate in the graphite reactor 1.

Claims

1. A sodium monofluorophosphate dual-line adjustable heating reactor, comprising a graphite reactor (1), the graphite reactor (1) being coated with a silicon carbide layer (2), characterized in that: A groove (3) is provided on the silicon carbide layer (2), a first resistance wire (4) and a second resistance wire (5) are arranged in the groove (3), and a heat-insulating layer (6) is provided on the surface of the silicon carbide layer (2).

2. A sodium monofluorophosphate double-line adjustable heating reactor according to claim 1, characterized in that, The first resistance wire (4) and the second resistance wire (5) are arranged in parallel and are individually controlled by the control system (8).

3. A sodium monofluorophosphate double-line adjustable heating reactor according to claim 1, characterized in that, The depth of the groove (3) is 7-12 mm.

4. A sodium monofluorophosphate double-line adjustable heating reactor according to claim 1, characterized in that, The size of the graphite reactor (1) is greater than or equal to φ160mm×900mm, the effective size is greater than or equal to φ160mm×800mm, and the effective reaction volume is greater than or equal to 16.1L.

5. A sodium monofluorophosphate double-line adjustable heating reactor according to claim 1, characterized in that, A shell layer (7) is provided on the surface of the thermal insulation layer (6).

6. A sodium monofluorophosphate double-line adjustable heating reactor according to claim 1, characterized in that, The groove (3) is a spiral structure.

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