Distillation device for nitric acid production and purification

Abstract

The utility model relates to the technical field of distillation devices, and discloses a distillation device for nitric acid production and purification, which comprises a treatment box, the inner bottom wall of the treatment box is fixedly connected with a heating bin, the top of the heating bin is fixedly connected with a heat conducting plate, and the inner wall of the treatment box is provided with a stirring assembly. A servo motor is started to drive a transmission shaft and a stirring rod set to rotate in an auxiliary bearing, nitric acid raw materials in a treatment box are stirred, a heat conduction plate is heated through a heating bin, the nitric acid raw materials absorb the temperature of the heat conduction plate to be evaporated, the heat transfer process can be accelerated by stirring the nitric acid raw materials at the moment, and the heat transfer efficiency is improved. The heat is more uniformly distributed in the raw materials, so that the temperature difference is reduced, the purpose of uniform heating temperature at each position is achieved, and impurities in the raw materials can be prevented from precipitating by stirring the raw materials, and the subsequent purification effect is prevented from being influenced by precipitates.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation devices, in particular to a distillation device for nitric acid production and purification. Background Technique

[0002] During the production process of nitric acid, distillation technology is usually used for purification. This is because nitric acid has a relatively high boiling point, and it can be separated from other low-boiling substances by distillation, so as to obtain high-purity nitric acid products.

[0003] Publication number: CN210728706U discloses a distillation device for ultra-high purity nitric acid production and purification, including a housing main body, a heating element and a discharge port. A heating element is fixed to the inner wall of the housing main body, and a heat conducting sheet is arranged outside the heating element, and the bottom end of the heat conducting sheet is fixed to the inner housing main body, and a scraping rod is arranged on the inner side wall of the inner housing main body. The distillation device for ultra-high purity nitric acid production and purification that can reduce raw material waste is provided with a heat conducting sheet, a connecting block and a conducting block. The materials of the heat conducting sheet, the connecting block and the conducting block are all copper materials. Furthermore, it is convenient for the heat conducting sheet to absorb heat, transfer the heat to the conducting block through the connecting block, and thus it is convenient for the conducting block to transfer the heat to the inner housing main body in contact therewith, so as to diffuse the heat generated by the heating element to the outer periphery of the inner housing main body, so that the liquid raw materials inside the inner housing main body can be evenly heated for distillation work, reducing the waste of liquid raw materials.

[0004] However, the above device has the following disadvantages in actual use: during the purification and distillation process, impurities will be contained in the raw materials. When the above device heats the raw materials, the raw materials are stationary, which may cause the internal impurities to precipitate, and the generation of precipitates will lead to a decline in the subsequent purification effect. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a distillation device for nitric acid production and purification.

[0006] The utility model is realized by adopting the following technical solutions: a distillation device for nitric acid production and purification, including a treatment tank, a heating chamber is fixedly connected to the inner bottom wall of the treatment tank, a heat conducting plate is fixedly connected to the top of the heating chamber, and a stirring assembly is arranged on the inner wall of the treatment tank;

[0007] The stirring assembly includes an auxiliary bearing, the auxiliary bearing is fixedly connected to the inner wall of the treatment tank, a transmission shaft is fixedly connected to the surface of the auxiliary bearing, and a stirring rod group is arranged on the outer surface of the transmission shaft;

[0008] Through the above technical solution, the servo motor is started to drive the transmission shaft and the stirring rod group to rotate inside the auxiliary bearing, and the nitric acid raw material inside the treatment tank is stirred. Since the heating chamber heats the heat conducting plate, the nitric acid raw material absorbs the temperature of the heat conducting plate and thus evaporates. At this time, by stirring the nitric acid raw material, the heat transfer process can be accelerated, so that the heat is more evenly distributed inside the raw material, thereby reducing the temperature difference and achieving the purpose of uniform heating temperature at each position, and avoiding waste of some raw material resources caused by different heating temperatures of the raw material.

[0009] As a further improvement of the above solution, the number of the stirring rod groups is three, which are respectively fixedly connected to both sides and the middle of the outer surface of the transmission shaft.

[0010] Through the above technical solution, the stirring rod groups are respectively fixedly connected to both sides and the middle of the outer surface of the transmission shaft, ensuring that each area inside the treatment tank can be stirred, so that the heat is more evenly distributed inside the raw material, thereby reducing the temperature difference.

[0011] As a further improvement of the above solution, one side of the outer surface of the treatment tank is fixedly connected with an inclined strut, and the top of the inclined strut is fixedly connected with a mounting plate.

[0012] Through the above technical solution, the inclined strut can provide lateral support for the mounting plate and improve the fixing effect on the mounting plate.

[0013] As a further improvement of the above solution, the top of the mounting plate is fixedly connected with a motor housing, a servo motor is arranged inside the motor housing, and one end of the transmission shaft is fixedly connected to the output end of the servo motor.

[0014] Through the above technical solution, the motor housing can protect the outer surface of the servo motor, preventing the servo motor from being exposed outside and colliding with external objects, resulting in a decrease in its own service life.

[0015] As a further improvement of the above solution, one side of the upper surface of the treatment tank is fixedly connected with a feed pipe, and a valve is arranged inside the feed pipe.

[0016] Through the above technical solution, personnel transport the raw material into the treatment tank through the feed pipe, and the setting of the valve can control the opening and closing of the feed pipe, ensuring that during the subsequent evaporation process, steam will not be discharged to the outside through the feed pipe, avoiding air pollution.

[0017] As a further improvement of the above solution, a discharge hole is opened in the middle of the upper surface of the treatment tank, a diversion pipe is arranged on the surface of the discharge hole, a gas collection box is fixedly connected to the other side of the upper surface of the treatment tank, and the diversion pipe is arranged inside the gas collection box.

[0018] Through the above technical solution, the air collecting box can uniformly collect the evaporated steam, preventing the steam from leaking out and causing environmental pollution and waste of resources.

[0019] As a further improvement of the above solution, a collecting box body is fixedly connected to the inner bottom wall of the air collecting box, and a condensation plate is arranged on the surface of the collecting box body.

[0020] Through the above technical solution, the steam generated after the evaporation of the raw material is liquefied into a liquid by the condensation plate, and the liquid flows downward into the interior of the collecting box body. The collecting box body can uniformly collect the liquid, facilitating subsequent processing by personnel.

[0021] As a further improvement of the above solution, a discharge pipe is arranged at the bottom of the collecting box body, and threads are engraved inside the discharge pipe.

[0022] Through the above technical solution, the function of the threads engraved on the discharge pipe is to facilitate the connection of the discharge pipe to external pump equipment, and personnel can extract the liquid through external equipment.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] By setting a stirring assembly in the present utility model, the servo motor is started to drive the transmission shaft and the stirring rod group to rotate inside the auxiliary bearing, stirring the nitric acid raw material inside the processing box. Since the heating chamber heats the heat conducting plate, the nitric acid raw material absorbs the temperature of the heat conducting plate and thus evaporates. At this time, by stirring the nitric acid raw material, the heat transfer process can be accelerated, making the heat distribution more uniform inside the raw material, thereby reducing the temperature difference and achieving the purpose of uniform heating temperature at each position. Moreover, by stirring the raw material, the precipitation of impurities inside the raw material can be avoided, preventing the precipitates from affecting the subsequent purification effect. Brief Description of the Drawings

[0025] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 2 is a schematic diagram of the structure of the heat conducting plate of the present utility model;

[0027] Figure 3 is a schematic diagram of the disassembled structure of the heating chamber of the present utility model;

[0028] Figure 4 is a schematic diagram of the disassembled structure of the servo motor of the present utility model;

[0029] Figure 5 is a schematic diagram of the disassembled structure of the stirring assembly of the present utility model

[0030] Figure 6Schematic diagram of the structural disassembly of the condensation plate of the present utility model;

[0031] Main symbol description:

[0032] 1. Processing box; 2. Heating chamber; 3. Heat conduction plate; 4. Stirring assembly; 401. Auxiliary bearing; 402. Transmission shaft; 403. Stirring rod group; 5. Diagonal strut; 6. Mounting plate; 7. Motor housing; 8. Servo motor; 9. Feed pipe; 10. Diversion pipe; 11. Gas collection box; 12. Collection box body; 13. Condensation plate; 14. Discharge pipe. Specific implementation manners

[0033] Next, in combination with the accompanying drawings and specific implementation manners, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0034] Embodiment 1:

[0035] Please refer to Figures 1-5 , a distillation device for nitric acid production and purification in this embodiment includes a processing box 1. The inner bottom wall of the processing box 1 is fixedly connected with a heating chamber 2. The top of the heating chamber 2 is fixedly connected with a heat conduction plate 3. A stirring assembly 4 is arranged on the inner wall of the processing box 1;

[0036] The stirring assembly 4 includes an auxiliary bearing 401. The auxiliary bearing 401 is fixedly connected to the inner wall of the processing box 1. The surface of the auxiliary bearing 401 is fixedly connected with a transmission shaft 402. A stirring rod group 403 is arranged on the outer surface of the transmission shaft 402. By starting the servo motor 8, the transmission shaft 402 and the stirring rod group 403 are driven to rotate inside the auxiliary bearing 401 to stir the nitric acid raw material inside the processing box 1. Since the heating chamber 2 heats the heat conduction plate 3, the nitric acid raw material absorbs the temperature of the heat conduction plate 3 and thus evaporates. At this time, by stirring the nitric acid raw material, the heat transfer process can be accelerated, so that the heat is more evenly distributed inside the raw material, thereby reducing the temperature difference and achieving the purpose of uniform heating temperature at each position, and avoiding waste of some raw material resources due to different heating temperatures of the raw material.

[0037] The number of the stirring rod groups 403 is three, which are respectively fixedly connected to both sides and the middle of the outer surface of the transmission shaft 402. The stirring rod groups 403 are respectively fixedly connected to both sides and the middle of the outer surface of the transmission shaft 402, ensuring that each area inside the processing box 1 can be stirred, so that the heat is more evenly distributed inside the raw material, thereby reducing the temperature difference.

[0038] One side of the outer surface of the processing box 1 is fixedly connected with a diagonal strut 5. The top of the diagonal strut 5 is fixedly connected with a mounting plate 6. The diagonal strut 5 can laterally support the mounting plate 6 to improve the fixing effect on the mounting plate 6.

[0039] A motor housing 7 is fixedly connected to the top of the mounting plate 6. A servo motor 8 is arranged inside the motor housing 7. One end of the transmission shaft 402 is fixedly connected to the output end of the servo motor 8. The motor housing 7 can protect the outer surface of the servo motor 8, preventing the servo motor 8 from being exposed outside and colliding with external objects, which may lead to a decrease in its own service life.

[0040] Embodiment 2:

[0041] Please refer to Figure 6 For a distillation device for nitric acid production and purification in this embodiment, it includes a treatment tank 1. One side of the upper surface of the treatment tank 1 is fixedly connected with a feed pipe 9. A valve is arranged inside the feed pipe 9. Personnel can transport raw materials into the treatment tank 1 through the feed pipe 9. The setting of the valve can control the opening and closing of the feed pipe 9, ensuring that during the subsequent evaporation process, steam will not be discharged to the outside through the feed pipe 9, thus avoiding air pollution.

[0042] A discharge hole is opened in the middle of the upper surface of the treatment tank 1. A diversion pipe 10 is arranged on the surface of the discharge hole. The other side of the upper surface of the treatment tank 1 is fixedly connected with a gas collection tank 11. The diversion pipe 10 is arranged inside the gas collection tank 11. The gas collection tank 11 can uniformly collect the evaporated steam, preventing the steam from leaking out and causing environmental pollution and resource waste.

[0043] A collection box body 12 is fixedly connected to the inner bottom wall of the gas collection tank 11. A condensation plate 13 is arranged on the surface of the collection box body 12. The steam generated after the evaporation of the raw materials is liquefied into a liquid through the condensation plate 13, and the liquid flows downward into the collection box body 12. The collection box body 12 can uniformly collect the liquid, facilitating subsequent processing by personnel.

[0044] A discharge pipe 14 is arranged at the bottom of the collection box body 12. Threads are engraved inside the discharge pipe 14. The function of the engraved threads on the discharge pipe 14 is to facilitate the connection of the discharge pipe 14 with external pump equipment. Personnel can extract the liquid through external equipment.

[0045] In the embodiment of the present application, the implementation principle of a distillation device for nitric acid production and purification is as follows: Personnel transport raw materials to the inside of the treatment tank 1 through the feed pipe 9. The setting of the valve can control the opening and closing of the feed pipe 9 to ensure that during the subsequent evaporation process, steam will not be discharged to the outside through the feed pipe 9, avoiding air pollution. At this time, personnel heat the heat conduction plate 3 through the heating chamber 2, and the raw materials absorb the heat of the heat conduction plate 3 and thus evaporate. At this time, by starting the servo motor 8, the transmission shaft 402 and the stirring rod group 403 are driven to rotate inside the auxiliary bearing 401 to stir the nitric acid raw materials inside the treatment tank 1, which can accelerate the heat transfer process, make the heat distribution more uniform inside the raw materials, thereby reducing the temperature difference and achieving the purpose of uniform heating temperature at each position, avoiding waste of some raw material resources due to different heating temperatures of the raw materials. The steam generated by the heated raw materials flows through the diversion pipe 10 to the condensation plate 13 inside the gas collection tank 11. The gas collection tank 11 can uniformly collect the evaporated steam to avoid steam leakage. The steam is liquefied into a liquid through the condensation plate 13, and the liquid flows downward into the inside of the collection box body 12. The collection box body 12 can uniformly collect the liquid, facilitating subsequent processing by personnel. The function of the threads engraved on the discharge pipe 14 is to facilitate the connection of the discharge pipe 14 with external pump equipment, and personnel can extract the liquid through external equipment.

[0046] The above implementation manners are only the preferred implementation manners of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A distillation apparatus for nitric acid production and purification, characterized in that: It comprises a processing box (1), the inner bottom wall of the processing box (1) is fixedly connected to a heating chamber (2), the top of the heating chamber (2) is fixedly connected to a heat conducting plate (3), and the inner wall of the processing box (1) is provided with a stirring assembly (4); The stirring assembly (4) comprises an auxiliary bearing (401), wherein the auxiliary bearing (401) is fixedly connected to the inner wall of the processing box (1), a transmission shaft (402) is fixedly connected to the surface of the auxiliary bearing (401), and a stirring rod group (403) is arranged on the outer surface of the transmission shaft (402).

2. A distillation apparatus for nitric acid production and purification as claimed in claim 1, characterized in that: There are three stirring rod groups (403), which are respectively fixedly connected to the two sides and the middle of the outer surface of the transmission shaft (402).

3. A distillation apparatus for nitric acid production and purification as claimed in claim 1, characterized in that: A diagonal support rod (5) is fixedly connected to one side of the outer surface of the processing box (1), and a mounting plate (6) is fixedly connected to the top end of the diagonal support rod (5).

4. A distillation apparatus for nitric acid production and purification as claimed in claim 3, characterized in that: A motor housing (7) is fixedly connected to the top of the mounting plate (6), a servo motor (8) is arranged inside the motor housing (7), and one end of the transmission shaft (402) is fixedly connected to the output end of the servo motor (8).

5. A distillation apparatus for nitric acid production and purification as claimed in claim 1, characterized in that: A feed pipe (9) is fixedly connected to one side of the upper surface of the processing box (1), and a valve is arranged inside the feed pipe (9).

6. A distillation apparatus for nitric acid production and purification as claimed in claim 1, characterized in that: A discharge hole is provided in the middle of the upper surface of the processing box (1), a flow guide pipe (10) is provided on the surface of the discharge hole, and a gas collecting box (11) is fixedly connected to the other side of the upper surface of the processing box (1), and the flow guide pipe (10) is arranged inside the gas collecting box (11).

7. A distillation apparatus for nitric acid production and purification as claimed in claim 6, characterized in that: The inner bottom wall of the air collecting box (11) is fixedly connected to a collecting box body (12), and a condensation plate (13) is provided on the surface of the collecting box body (12).

8. A distillation apparatus for nitric acid production and purification as claimed in claim 7, characterized in that: A discharge pipe (14) is provided at the bottom of the collection box body (12), and a thread is engraved inside the discharge pipe (14).

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