High-purity nitrogen preparation device

Abstract

The utility model belongs to the technical field of nitrogen preparation, and particularly relates to a high-purity nitrogen preparation device which comprises a low-temperature liquid nitrogen storage tank, a nitrogen evaporation device and a high-pressure nitrogen storage tank which are sequentially connected, the nitrogen evaporation device comprises a tank body, the lower portion of the tank body is communicated with the low-temperature liquid nitrogen storage tank, and the upper portion of the tank body is communicated with the high-pressure nitrogen storage tank. A height adjusting mechanism is installed in the tank body, a heat conduction piece is installed on the height adjusting mechanism, a heating device is installed on the tank body, the heating device and the heat conduction piece are connected through a heat conduction metal wire, the height adjusting mechanism is a hollow buoyancy piece, the heat conduction piece is installed on the lower side of the hollow buoyancy piece, the heat conduction piece is a spiral hollow pipe, and the heat conduction piece is made of copper. The heat conduction piece surrounds a circle to form a heating section, and the distance between the two heating sections is gradually reduced from inside to outside. According to the device, the energy consumption in the high-purity sputum preparation process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of nitrogen preparation, and specifically relates to a high-purity nitrogen preparation device. Background Art

[0002] High-purity nitrogen is often needed in the fields of scientific research, medical diagnosis and drug development. In order to improve the purity of sputum gas, a Chinese patent with authorization announcement number CN214147407U discloses a high-purity nitrogen acquisition and storage device for rocket engine testing, which directly prepares high-pressure nitrogen for testing by volatilizing liquid nitrogen. The test gas is uniformly prepared and stored, which reduces secondary pollution and the reduction of gas purity and the introduction of excess substances caused by repeated pressure relief of pipelines, improves the purity of nitrogen for testing, and ensures the reliability of the test;

[0003] However, in the process of preparing high-purity nitrogen, a large amount of heat energy is required to convert liquid nitrogen into nitrogen, resulting in a large consumption of energy in the process of preparing high-purity nitrogen. Utility Model Content

[0004] The purpose of the present invention is to provide a high-purity nitrogen preparation device, which can reduce the energy consumption in the process of preparing high-purity sputum gas.

[0005] The technical solutions adopted in this utility are as follows:

[0006] A high-purity nitrogen preparation device comprises a cryogenic liquid nitrogen storage tank, a nitrogen evaporation device and a high-pressure nitrogen storage tank which are connected in sequence, wherein the nitrogen evaporation device comprises a tank body, the lower part of the tank body is connected to the cryogenic liquid nitrogen storage tank, the upper part of the tank body is connected to the high-pressure nitrogen storage tank, a height adjustment mechanism is installed inside the tank body, a heat conducting member is installed on the height adjustment mechanism, a heating device is installed on the tank body, and the heating device and the heat conducting member are connected by a heat conducting metal wire.

[0007] Furthermore, the height adjustment mechanism is a hollow buoyancy member, and the heat conducting member is installed on the lower side of the hollow buoyancy member.

[0008] Furthermore, the heat conducting member is a spiral hollow tube, and the material of the heat conducting member is copper.

[0009] Furthermore, one circle of the heat conducting member constitutes a heating section, and the distance between two heating sections gradually decreases from the inside to the outside.

[0010] Furthermore, the heating device includes a heat collecting core column fixedly connected to the outside of the tank body and a sunlight concentrating guide member for concentrating sunlight on the heat collecting core column, and the heat collecting core column and the heat conducting member are connected by a heat conducting metal wire.

[0011] Furthermore, the sunlight concentration guide may be a reflector fixedly connected to the outside of the tank body, the heat collecting core column is fixedly connected to the axis of the reflector, and the inner wall of the reflector is a reflective surface.

[0012] The technical effects achieved by this utility model are:

[0013] The high-purity nitrogen preparation device of the present invention adjusts the height of the heat-conducting part by means of a height-adjusting mechanism, so that the heat-conducting part is moved to a position inside the liquid nitrogen close to the liquid surface, which can shorten the distance of heat energy transfer, improve heating efficiency, and reduce heat energy consumption, thereby reducing energy consumption in the process of preparing high-purity nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of this utility model;

[0015] Figure 2 It is a schematic diagram of the cross-section structure of the practical nitrogen evaporation device;

[0016] Figure 3 It is an enlarged structural diagram of the practical heat-conducting component;

[0017] Figure 4 It is an enlarged structural diagram of the practical heat collecting core column and reflector.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Low-temperature liquid nitrogen storage tank; 2. Nitrogen evaporation device; 3. High-pressure nitrogen storage tank; 4. Tank body; 5. Hollow buoyancy part; 6. Heat conduction part; 7. Heat collecting core column; 8. Reflector. DETAILED DESCRIPTION

[0020] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0021] like Figure 1-4 As shown, a high-purity nitrogen preparation device comprises a cryogenic liquid nitrogen storage tank 1, a nitrogen evaporation device 2 and a high-pressure nitrogen storage tank 3 which are connected in sequence. The cryogenic liquid nitrogen storage tank 1 can transport the frozen liquid nitrogen inside thereof into the interior of the nitrogen evaporation device 2. The liquid nitrogen is converted into gaseous nitrogen by the nitrogen evaporation device 2 and then transported into the interior of the high-pressure nitrogen storage tank 3 for storage. By directly converting the liquid nitrogen into gaseous nitrogen, the introduction of impurities can be reduced, and nitrogen with higher purity can be obtained.

[0022] In order to reduce the energy consumption in the nitrogen preparation process, the present technical solution improves the nitrogen evaporation device 2. For details, please refer to Figure 1-2As shown, the nitrogen evaporation device 2 includes a tank body 4, the lower part of the tank body 4 is connected to the low-temperature liquid nitrogen storage tank 1, the upper part of the tank body 4 is connected to the high-pressure nitrogen storage tank 3, and a height adjustment mechanism is installed inside the tank body 4, and a heat conductor 6 is installed on the height adjustment mechanism. A heating device is installed on the tank body 4, and the heating device and the heat conductor 6 are connected by a heat-conducting metal wire. At this time, the height adjustment mechanism is started to adjust the height of the heat conductor 6, so that the heat conductor 6 is moved to a position close to the liquid surface inside the liquid nitrogen, and then the heating device is started. The heat energy is transferred to the heat conductor 6 by the heating device, and the liquid nitrogen at the liquid surface can be heated by the heat conductor 6, so that the gaseous nitrogen converted after heating can directly rise to the top of the tank body 4 and then be discharged. Since the heat conductor 6 is always located in the liquid nitrogen and close to the liquid surface, the heat energy released by the heat conductor 6 is directly transferred to the liquid nitrogen at the liquid surface, which can shorten the distance of heat energy transfer, improve heating efficiency, and reduce heat energy consumption.

[0023] The height adjustment mechanism may be a combination of a liquid level sensor and a vertically arranged electric push rod or a vertical linear displacement table, which may directly drive the heat conducting member 6 connected thereto to move vertically, or may be a combination of a liquid level sensor and a vertically arranged electric push rod or a vertical linear displacement table, Figure 2 As shown, the height adjustment mechanism is a hollow buoyancy member 5, and the heat conductive member 6 is installed on the lower side of the hollow buoyancy member 5. At this time, under the action of buoyancy, the hollow buoyancy member 5 will move along with the liquid level of the liquid nitrogen, thereby automatically adjusting the height of the heat conductive member 6. The structure is relatively simple, and the heat conductive member 6 can be stably moved to a position close to the liquid surface in the liquid nitrogen.

[0024] Furthermore, a vertical positioning column may be fixedly connected to the interior of the tank body 4, so that the heat conducting member 6 is vertically slidably connected to the interior of the vertical positioning column, thereby completing the position limiting so that the heat conducting member 6 can only move vertically.

[0025] Among them, the heat conductor 6 is a spiral hollow tube, which can be made of copper and has good heat conduction effect. The end of the heat conductor 6 located in the center is connected to the heating device through a heat-conducting metal wire. The heat conductor 6 is surrounded by a circle as a heating section, and the distance between the two heating sections gradually decreases from the inside to the outside, so that the heat conductor 6 can heat the liquid nitrogen near the liquid surface more evenly.

[0026] Wherein, the heating device may include a resistance heater, and the heat energy generated by the resistance heater may be directly transmitted to the heat conducting member 6;

[0027] The heating device in this technical solution can also be Figure 4As shown, it includes a heat collecting core column 7 fixedly connected to the outside of the tank body 4 and a solar light concentrating guide member that concentrates sunlight on the heat collecting core column 7. The heat collecting core column 7 and the heat conductive member 6 are connected by a heat conductive metal wire. At this time, the solar light concentrating guide member concentrates sunlight on the heat collecting core column 7 to heat the heat collecting core column 7. After being heated, the heat collecting core column 7 directly transfers heat energy to the heat conductive member 6 to complete the heating of the heat conductive member 6, thereby effectively reducing the consumption of non-renewable resources.

[0028] The sunlight concentrating guide may be a convex lens, which directly concentrates sunlight on one surface onto the same heat collecting core column 7, thereby improving the utilization rate of solar energy.

[0029] The sunlight concentrating guide can also be a reflector 8 fixedly connected to the outside of the tank body 4, and the heat collecting core column 7 is fixedly connected at the axis of the reflector 8. The inner wall of the reflector 8 is a reflective surface, which can refract the sunlight irradiated on the reflective surface onto the heat collecting core column 7.

[0030] At the same time, the resistance heater can also be used in combination with the heat collecting core column 7 and the sunlight concentration guide member, and heating can be performed by electric energy when solar energy is not applicable.

[0031] The working principle of the utility model is as follows: the height adjustment mechanism is started to adjust the height of the heat-conducting member 6, so that the heat-conducting member 6 is moved to a position close to the liquid surface inside the liquid nitrogen, and then the heating device is started, and the heat energy is transferred to the heat-conducting member 6 through the heating device, so that the liquid nitrogen at the liquid surface can be heated by the heat-conducting member 6, so that the gaseous nitrogen converted after heating can directly rise to the top of the tank body 4, and then be discharged. Since the heat-conducting member 6 is always located in the liquid nitrogen and close to the liquid surface, the heat energy released by the heat-conducting member 6 is directly transferred to the liquid nitrogen at the liquid surface;

[0032] In summary, the technical solution adjusts the height of the heat conductor 6 through the height adjustment mechanism, so that the heat conductor 6 is moved to a position close to the liquid surface inside the liquid nitrogen, which can shorten the distance of heat energy transfer, improve heating efficiency, and reduce heat energy consumption, thereby reducing energy consumption in the process of preparing high-purity sputum gas.

[0033] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A high-purity nitrogen preparation device, comprising a low-temperature liquid nitrogen storage tank (1), a nitrogen evaporation device (2) and a high-pressure nitrogen storage tank (3) connected in sequence, characterized in that: The nitrogen evaporation device (2) comprises a tank body (4), the lower part of the tank body (4) is connected to a low-temperature liquid nitrogen storage tank (1), the upper part of the tank body (4) is connected to a high-pressure nitrogen storage tank (3), a height adjustment mechanism is installed inside the tank body (4), a heat conducting member (6) is installed on the height adjustment mechanism, a heating device is installed on the tank body (4), and the heating device and the heat conducting member (6) are connected via a heat conducting metal wire.

2. A high-purity nitrogen production device according to claim 1, characterized in that: The height adjustment mechanism is a hollow buoyancy member (5), and the heat conducting member (6) is installed on the lower side of the hollow buoyancy member (5).

3. A high-purity nitrogen production device according to claim 1, characterized in that: The heat conducting member (6) is a spiral hollow tube, and the material of the heat conducting member (6) is copper.

4. A high-purity nitrogen production device according to claim 3, characterized in that: One circle of the heat conducting member (6) forms a heating section, and the distance between two heating sections gradually decreases from the inside to the outside.

5. A high-purity nitrogen production device according to claim 1, characterized in that: The heating device comprises a heat collecting core column (7) fixedly connected to the outside of the tank body (4) and a sunlight concentrating guide member for concentrating sunlight on the heat collecting core column (7); the heat collecting core column (7) and the heat conducting member (6) are connected via a heat conducting metal wire.

6. A high-purity nitrogen production device according to claim 5, characterized in that: The sunlight concentrating guide may also be a reflector (8) fixedly connected to the outside of the tank body (4), the heat collecting core column (7) is fixedly connected to the axis of the reflector (8), and the inner wall of the reflector (8) is a reflective surface.

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