Nitrogen purification device and purification method

Abstract

The invention relates to a nitrogen purification device and a purification method. The nitrogen purification device comprises a purification tank body and a heat energy recovery tank connected with the purification tank body, a turntable rotationally connected with the purification tank body is arranged in the purification tank body, a gas cooling assembly is fixedly arranged in the middle of the turntable, and the top of the cooling assembly is connected with a gas inlet pipeline; a plurality of connecting rods are distributed on the outer circumferential surface of the turntable in a scattering manner, a mounting groove is formed in the free end of each connecting rod, and an adsorption tank body is mounted in each mounting groove; a molecular sieve is mounted in the adsorption tank body, and the gas inlet end of the adsorption tank body is connected with the gas cooling assembly through a shunting pipeline; a gas outlet pipeline is arranged at the upper end of the nitrogen storage tank and is communicated into the nitrogen storage tank; the nitrogen storage tank is rotationally connected to the top of the purification tank body; and a rotating shaft of the turntable is in driving connection with a driving motor mounted in the purification tank body.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen preparation, and in particular to a nitrogen purification device and a purification method. Background Art

[0002] Nitrogen is widely used in industry and laboratories. In industry, nitrogen is often used in welding, food packaging, chemical industry and other fields. In the laboratory, nitrogen can be prepared by heating nitrogen hydrogen red alum and collected by drainage method. At present, the commonly used nitrogen preparation methods in industry are mainly cryogenic method, pressure swing adsorption (PSA) and membrane separation method, among which pressure swing adsorption (PSA) is more common.

[0003] For example, a Chinese invention patent with application number CN01104857.3 discloses a device for preparing low dew point nitrogen by pressure swing adsorption, which mainly includes an air compressor, a cooler, a high-efficiency oil remover, a nitrogen adsorption tower, a nitrogen buffer tank, a nitrogen storage tank, an automatic control valve and a pipeline, etc., and is characterized in that a drying adsorption tower is set between the nitrogen buffer tank and the nitrogen storage tank, and a spare dryer is also set behind the nitrogen storage tank. The device of the present invention can produce nitrogen with a dew point below -60°C, absolutely ensuring the requirements for low dew point and continuous nitrogen supply in production, and the device is small, low in operating cost, and low in price and practical, and can be used in electronics, chemical industry, food packaging and storage, etc.; However, the device cannot effectively and quickly diffuse the heat energy generated in the nitrogen production process, which leads to excessively high temperature of the adsorption tank, low nitrogen production efficiency, low nitrogen purity, and cannot meet higher purity requirements.

[0004] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0005] The object of the present invention is to provide a nitrogen purification device and a purification method which can effectively solve the above technical problems.

[0006] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0007] A nitrogen purification device and a purification method, comprising a purification tank body and a heat recovery tank connected to the purification tank body;

[0008] The purification tank body is provided with a turntable rotatably connected thereto, a gas cooling assembly is fixedly arranged in the middle of the turntable, and an air inlet pipe is connected to the top of the cooling assembly;

[0009] A plurality of connecting rods are scatteredly distributed on the outer circumference of the rotating disk, and a mounting groove is provided at the free end of each connecting rod, and an adsorption tank is installed in the mounting groove;

[0010] A molecular sieve is installed in the adsorption tank, and its air inlet end is connected to the gas cooling component through a shunt pipe; and an air outlet pipe is arranged at its upper end, and the air outlet pipe is connected to the nitrogen storage tank;

[0011] The nitrogen storage tank is rotatably connected to the top of the purification tank body;

[0012] The rotating shaft of the turntable is drivingly connected to a driving motor installed inside the purification tank body.

[0013] Furthermore, a positioning block is arranged on the outer circumferential wall of the installation groove, a positioning ring groove is opened on the inner side wall of the purification tank body, and the positioning block is rotatably connected in the positioning ring groove.

[0014] Furthermore, a positioning ring block is fixedly provided on the outer side wall of the nitrogen storage tank, a slide groove is opened on the inner side wall of the purification tank body, and the positioning ring block is rotatably connected in the slide groove.

[0015] Furthermore, the cooling assembly includes an air pipeline and a cooling jacket sleeved on the outside of the air pipeline, the air intake pipeline is connected to the top of the air pipeline, and the diversion pipeline is evenly arranged at the lower end of the air intake pipeline.

[0016] Furthermore, a fan is provided at the lower end of the turntable, and the fan is coaxially arranged with the turntable.

[0017] Furthermore, magnet blocks are installed at the bottom of the adsorption tank and in the installation groove, and the two are fixed by magnetic adsorption.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] When the present invention is used, the compressed gas first enters the cooling component for cooling, and then enters the adsorption tank through the shunt pipe for adsorption. During this process, the drive motor drives the turntable to drive the adsorption tank and the cooling component to rotate, which can not only speed up the gas circulation in the purification tank, but also diffuse the heat energy generated in the adsorption and cooling process in time, improve the heat dissipation effect, and ensure the nitrogen production efficiency of the adsorption tank; at the same time, during the rotation of the adsorption tank, the gas can fully contact with the molecular sieve, the adsorption effect is good, and the purity of the nitrogen can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0021] Figure 1 A schematic structural diagram of a nitrogen purification device and a purification method provided by the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a nitrogen purification device and a purification method provided by the present invention.

[0023] Explanation of numbers in the figure: 1. Purification tank body; 2. Heat recovery tank; 3. Turntable; 4. Air inlet pipe; 5. Mounting slot; 6. Adsorption tank body; 7. Driving motor; 8. Positioning block; 9. Positioning ring block; 10. Gas transmission pipeline; 11. Cooling jacket; 12. Fan; 13. Diversion pipeline; 14. Air outlet pipeline; 15. Nitrogen storage tank. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0025] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] A nitrogen purification device and a purification method of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the present invention provides a nitrogen purification device and a purification method, which comprises a purification tank body 1 and a heat recovery tank 2 connected to the purification tank body 1. A turntable 3 rotatably connected to the purification tank body 1 is arranged in the purification tank body 1, a gas cooling assembly is installed in the middle of the turntable 3, and an air intake pipe 4 is connected to the top of the cooling assembly.

[0028] A plurality of connecting rods are scatteredly distributed on the outer circumferential surface of the rotating disk 3 , and a mounting groove 5 is provided at the free end of each connecting rod. An adsorption tank 6 is installed in the mounting groove 5 .

[0029] A molecular sieve is installed in the adsorption tank body 6, and its air inlet end is connected to the gas cooling component through a diversion pipe 13, and an air outlet pipe 14 is provided at its upper end, and the air outlet pipe 14 is connected to the nitrogen storage tank; the nitrogen storage tank is rotatably connected to the top of the purification tank body 1.

[0030] A driving motor 7 is installed on the inner wall of the bottom of the purification tank body 1, and the driving motor 7 and the driving end are connected to the rotating shaft of the turntable 3, so that the driving motor 7 drives the turntable 3 to drive the adsorption tank body 6 and the cooling assembly and other components to rotate.

[0031] When in use, the compressed gas first enters the cooling component for cooling, and then enters the adsorption tank body 6 through the shunt pipe 13 for adsorption. During this process, the drive motor 7 drives the turntable 3 to drive the adsorption tank body 6 and the cooling component to rotate, which can not only speed up the gas circulation in the purification tank body, but also diffuse the heat energy generated during the adsorption and cooling process in time, improve the heat dissipation effect, and ensure the nitrogen production efficiency of the adsorption tank body 6; at the same time, during the rotation of the adsorption tank body 6, the gas can fully contact with the molecular sieve, the adsorption effect is good, and the purity of the nitrogen can be effectively improved.

[0032] Specifically, in the present embodiment, a positioning block 8 is provided on the outer circumferential wall of the mounting groove 5, a positioning ring groove is provided on the inner side wall of the purification tank body 1, and the positioning block 8 is rotatably connected in the positioning ring groove; at the same time, a positioning ring block 9 is installed on the outer side wall of the nitrogen storage tank, a slide groove is provided on the inner side wall of the purification tank body 1, and the positioning ring block 9 is rotatably connected in the slide groove; through the cooperation between the above structures, the stability of the turntable 3 during the working process can be improved, and the nitrogen production work can be ensured to be carried out quickly and efficiently.

[0033] In addition, in this embodiment, the cooling assembly includes an air pipeline 10 and a cooling jacket 11 sleeved on the outside of the air pipeline 10. The air intake pipeline 4 is connected to the top of the air pipeline 10, and the flow distribution pipeline 13 is evenly arranged at the lower end of the air intake pipeline 4; the cooling jacket 11 adopts a water-cooled cooling jacket.

[0034] Meanwhile, in the present embodiment, a fan 12 is further provided at the lower end of the turntable 3, and the fan 12 is coaxially arranged with the turntable 3; the arrangement of the fan 12 can further improve the heat dissipation effect, reduce the temperature of the adsorption tank 6, and improve the adsorption effect.

[0035] In addition, magnet blocks are installed at the bottom of the adsorption tank body 6 and in the installation groove 5, and the two are fixed by magnetic adsorption, so as to facilitate the installation and disassembly of the adsorption tank body 6 and ensure its stability during rotation.

[0036] Specifically, the present invention also provides a nitrogen purification method, which needs to be implemented in conjunction with the above-mentioned nitrogen purification device, specifically: the gas is first cooled by a cooling component, and then diverted to multiple adsorption tanks 6 for adsorption, and during the adsorption process, a turntable 3 is used to drive the adsorption tank 6 to rotate to improve the heat dissipation effect, thereby improving the purification efficiency and obtaining nitrogen with higher purity.

[0037] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0038] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

Claims

1. A nitrogen purification device, characterized in that: It includes a purification tank body and a heat recovery tank connected to the purification tank body; The purification tank body is provided with a turntable rotatably connected thereto, a gas cooling assembly is fixedly arranged in the middle of the turntable, and an air inlet pipe is connected to the top of the cooling assembly; A plurality of connecting rods are scatteredly distributed on the outer circumference of the rotating disk, and a mounting groove is provided at the free end of each connecting rod, and an adsorption tank is installed in the mounting groove; A molecular sieve is installed in the adsorption tank, and its air inlet end is connected to the gas cooling component through a shunt pipe; and an air outlet pipe is arranged at its upper end, and the air outlet pipe is connected to the nitrogen storage tank; The nitrogen storage tank is rotatably connected to the top of the purification tank body; The rotating shaft of the turntable is drivingly connected to a driving motor installed inside the purification tank body.

2. A nitrogen purification device according to claim 1, characterized in that: A positioning block is arranged on the outer circumferential wall of the installation groove, a positioning ring groove is opened on the inner side wall of the purification tank body, and the positioning block is rotatably connected in the positioning ring groove.

3. A nitrogen purification device according to claim 2, characterized in that: A positioning ring block is fixedly arranged on the outer side wall of the nitrogen storage tank, a slide groove is opened on the inner side wall of the purification tank body, and the positioning ring block is rotatably connected in the slide groove.

4. A nitrogen purification device according to claim 1 or 3, characterized in that: The cooling assembly includes an air pipeline and a cooling jacket sleeved on the outside of the air pipeline. The air intake pipeline is connected to the top of the air pipeline, and the flow distribution pipeline is evenly arranged at the lower end of the air intake pipeline.

5. A nitrogen purification device according to claim 4, characterized in that: A fan is arranged at the lower end of the rotating disk, and the fan is arranged coaxially with the rotating disk.

6. A nitrogen purification device according to claim 5, characterized in that: Magnet blocks are installed at the bottom of the adsorption tank and in the installation groove, and the two are fixed by magnetic adsorption.

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