Anhydrous hydrogen fluoride rectification device

Abstract

The utility model relates to the field of anhydrous hydrogen fluoride preparation devices, in particular to an anhydrous hydrogen fluoride rectification device which comprises a rectification tank, an electric heating plate is fixed to the rectification tank, a waste discharge pipe is fixed to the bottom of the rectification tank, a liquid storage tank is fixed to one side of the rectification tank, and the liquid storage tank is connected with the rectification tank through a feeding pipe. A gas outlet pipe is further fixed at the top of the rectification tank, the gas outlet pipe is connected with a waste heat pipe in the liquid storage tank, a discharge pipe is further fixed at the tail end of the waste heat pipe, and a water tank is further fixed on the discharge pipe. The device can realize anhydrous hydrogen fluoride rectification, and vaporized high-temperature hydrogen fluoride gas firstly enters the liquid storage tank to preheat hydrogen fluoride liquid in the liquid storage tank, so that heat of the rectified hydrogen fluoride can be effectively utilized, and heat waste is reduced.

Description

[Technical field]

[0001] The invention relates to the field of anhydrous hydrogen fluoride preparation devices, in particular to an anhydrous hydrogen fluoride distillation device. [Background technology]

[0002] Hydrogen fluoride is the basis of modern fluorine chemical industry. Anhydrous hydrogen fluoride is the raw material for electrolytic production of elemental fluorine. In the chemical industry, it is widely used to replace chlorine in halogenated hydrocarbons with fluorine to produce chlorofluorocarbons, such as dichlorodifluoromethane and dichloromonofluoromethane. In the petrochemical industry, it is used as a liquid catalyst for the alkylation of aromatic hydrocarbons and aliphatic compounds to produce high-octane gasoline. In the electronics industry, anhydrous hydrogen fluoride is used as a raw material for electrolytic synthesis of nitrogen trifluoride and an etchant in semiconductor manufacturing processes. In addition, hydrogen fluoride is used in the industrial production of hydrofluoric acid, the production of inorganic fluorides, uranium processing, metal processing, and etching agents in the glass industry. It occupies a very important position in the national economy. As the application scope of anhydrous hydrogen fluoride continues to expand from national defense and military industry to refrigeration and air conditioning, aerospace, automobile, textile, chemical, pharmaceutical and other industries, the demand for anhydrous hydrogen fluoride in various industries continues to increase, and it has a very large market prospect.

[0003] In the production process of anhydrous hydrogen fluoride, a distillation device is required to refine it so as to obtain high-purity anhydrous hydrogen fluoride. For example, patent application number: CN201921495536.X discloses an anhydrous hydrogen fluoride distillation purification device. First, hydrogen fluoride liquid is added to the liquid storage tank through the liquid inlet pipe, and then the charging jack is connected to make the heating block work to heat the surface of the liquid storage tank, and then the first motor is started. The start of the first motor will drive the stirring shaft and the stirring blade to stir the hydrogen fluoride liquid in the liquid storage tank, so that the liquid storage tank The hydrogen fluoride liquid in the tank can be heated evenly, and the speed of converting the hydrogen fluoride liquid into hydrogen fluoride gas under heating conditions is increased, which greatly improves the purification efficiency. The converted hydrogen fluoride gas will enter the water tank through the air duct, and then the hydrogen fluoride gas will be cooled by the coolant in the water tank, so as to obtain purified hydrogen fluoride. This type of anhydrous hydrogen fluoride distillation device discharges the anhydrous hydrogen fluoride gas directly into the water tank through the air duct for cooling, and the water tank directly absorbs the heat of the anhydrous hydrogen fluoride, resulting in waste of this part of the heat.

[0004] The present invention is proposed in view of the deficiencies in the prior art. [Summary of the invention]

[0005] The object of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an anhydrous hydrogen fluoride distillation device.

[0006] The present invention can be implemented by the following technical solutions:

[0007] The invention discloses an anhydrous hydrogen fluoride distillation device, comprising a distillation tank, an electric heating plate is fixed on the distillation tank, a waste discharge pipe is fixed on the bottom of the distillation tank, a liquid storage tank is fixed on one side of the distillation tank, the liquid storage tank is connected with the distillation tank through a feed pipe, an air outlet pipe is also fixed on the top of the distillation tank, the air outlet pipe is connected with a waste heat pipe in the liquid storage tank, a discharge pipe is also fixed at the end of the waste heat pipe, and a water tank is also fixed on the discharge pipe. After a specified amount of hydrogen fluoride in the liquid storage tank is discharged into the distillation tank through the feed pipe, the feed pipe is closed, the hydrogen fluoride in the distillation tank is heated by the electric heating plate, the hydrogen fluoride is vaporized after heating, and the vaporized hydrogen fluoride enters the waste heat pipe in the liquid storage tank through the gas outlet pipe. When the vaporized hydrogen fluoride passes through the waste heat pipe, the heat of the hydrogen fluoride is transferred to the liquid storage tank through the waste heat pipe to preheat the hydrogen fluoride liquid in the liquid storage tank. The hydrogen fluoride is finally discharged through the discharge pipe, and is liquefied and collected by cooling with water in the water tank. The device can realize the distillation of anhydrous hydrogen fluoride, and the high-temperature hydrogen fluoride gas after vaporization first enters the liquid storage tank to preheat the hydrogen fluoride liquid in the liquid storage tank, which can effectively utilize the heat of the hydrogen fluoride after distillation and reduce heat waste.

[0008] Preferably, the waste heat pipe is spirally arranged inside the liquid storage tank. The spiral arrangement of the waste heat pipe increases the residence time of the hydrogen fluoride gas after distillation in the liquid storage tank.

[0009] Preferably, a conical air collecting plate is fixed to the bottom of the air outlet pipe.

[0010] Preferably, a motor is also fixed on the distillation tank, and the output end of the motor is fixed to a stirring shaft inside the distillation tank, and a stirring blade is also fixed on the stirring shaft. During hydrogen fluoride distillation, the stirring shaft is driven to rotate by the motor, and the stirring blade on the stirring shaft stirs the distillation tank to make the heat in the distillation tank evenly distributed.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The device can realize the distillation of anhydrous hydrogen fluoride, and the high-temperature hydrogen fluoride gas after vaporization first enters the liquid storage tank to preheat the hydrogen fluoride liquid in the liquid storage tank, which can effectively utilize the heat of the hydrogen fluoride after distillation and reduce heat waste.

Brief Description of the Drawings

[0013] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 A top view of the present invention;

[0016] Figure 3 for Figure 2 Sectional view at AA;

[0017] In the figure: 1, distillation tank; 2, electric heating plate; 3, waste pipe; 4, motor; 5, stirring shaft; 6, stirring blade; 7, liquid storage tank; 8, feed pipe; 9, gas outlet pipe; 10, gas collecting plate; 11, waste heat pipe; 12, discharge pipe; 13, water tank; [Specific implementation method]

[0018] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0019] Embodiment 1:

[0020] like Figures 1 to 3 As shown, the present embodiment discloses an anhydrous hydrogen fluoride distillation device, comprising a distillation tank 1, an electric heating plate 2 is fixed on the distillation tank 1, a waste pipe 3 is fixed to the bottom of the distillation tank 1, a liquid storage tank 7 is fixed to one side of the distillation tank 1, the liquid storage tank 7 is connected to the distillation tank 1 through a feed pipe 8, an air outlet pipe 9 is also fixed to the top of the distillation tank 1, the air outlet pipe 9 is connected to the waste heat pipe 11 in the liquid storage tank 7, a discharge pipe 12 is also fixed to the end of the waste heat pipe 11, and a water tank 13 is also fixed to the discharge pipe 12. After a specified amount of hydrogen fluoride in the liquid storage tank 7 is discharged into the distillation tank 1 through the feed pipe 8, the feed pipe 8 is closed, and the hydrogen fluoride in the distillation tank 1 is heated by the electric heating plate 2. After heating, the hydrogen fluoride is vaporized, and the vaporized hydrogen fluoride enters the waste heat pipe 11 in the liquid storage tank 7 through the outlet pipe 9. When the vaporized hydrogen fluoride passes through the waste heat pipe 11, the heat of the hydrogen fluoride is transferred to the liquid storage tank 7 through the waste heat pipe 11 to preheat the hydrogen fluoride liquid in the liquid storage tank 7. The hydrogen fluoride is finally discharged through the discharge pipe 12, and is liquefied and collected by cooling with water in the water tank 13. The device can realize the distillation of anhydrous hydrogen fluoride, and the high-temperature hydrogen fluoride gas after vaporization first enters the liquid storage tank 7 to preheat the hydrogen fluoride liquid in the liquid storage tank 7, which can effectively utilize the heat of the hydrogen fluoride after distillation and reduce heat waste.

[0021] The waste heat pipe 11 is spirally arranged inside the liquid storage tank 7. The spiral arrangement of the waste heat pipe 11 increases the residence time of the hydrogen fluoride gas after distillation in the liquid storage tank 7.

[0022] A conical gas collecting plate 10 is fixed to the bottom of the gas outlet pipe 9 .

[0023] Embodiment 2:

[0024] This embodiment discloses an anhydrous hydrogen fluoride distillation device. Based on the structure and principle of embodiment 1, a motor 4 is further fixed on the distillation tank 1 of this embodiment, and the output end of the motor 4 is fixed to the stirring shaft 5 inside the distillation tank 1, and a stirring blade 6 is also fixed on the stirring shaft 5. During the distillation of hydrogen fluoride, the stirring shaft 5 is driven to rotate by the motor 4, and the stirring blade 6 on the stirring shaft 5 stirs the distillation tank 1, so that the heat distribution in the distillation tank 1 is uniform.

[0025] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be regarded as the scope of protection of the present invention.

Claims

1. An anhydrous hydrogen fluoride distillation device, comprising a distillation tank, characterized in that: An electric heating plate is fixed on the distillation tank, a waste pipe is fixed to the bottom of the distillation tank, a liquid storage tank is fixed to one side of the distillation tank, the liquid storage tank is connected to the distillation tank through a feed pipe, an air outlet pipe is also fixed to the top of the distillation tank, the air outlet pipe is connected to the waste heat pipe in the liquid storage tank, a discharge pipe is also fixed to the end of the waste heat pipe, and a water tank is also fixed on the discharge pipe.

2. The anhydrous hydrogen fluoride distillation device according to claim 1, characterized in that: The waste heat pipe is spirally arranged inside the liquid storage tank.

3. The anhydrous hydrogen fluoride distillation device according to claim 1, characterized in that: A conical air collecting plate is also fixed at the bottom of the air outlet pipe.

4. The anhydrous hydrogen fluoride distillation device according to claim 1, characterized in that: A motor is also fixed on the distillation tank, and an output end of the motor is fixed to a stirring shaft inside the distillation tank, and a stirring blade is also fixed on the stirring shaft.

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