High-purity nitrogen purification device

Abstract

The utility model discloses a high-purity nitrogen purification device, which relates to the technical field of gas purification and comprises a nitrogen making machine, a first air pump, a deoxygenization device, a heat exchanger, a dust filter, a second air pump and a nitrogen storage tank. The first air pump is connected between the nitrogen making machine and the deoxidizing device, the deoxidizing device comprises at least two groups of deoxidizing cylinders which are arranged in parallel, and electrical bars and copper meshes are arranged in the deoxidizing cylinders; the heat exchanger is connected between the deoxidizing device and the dust filter, and the second air pump is connected between the dust filter and the nitrogen storage tank; at least one layer of copper meshes is arranged in a deoxidizing cylinder in the deoxidizing device, the copper meshes are distributed in an equidistant array mode in the gas flowing direction, and an electric heating bar penetrates through all the copper meshes; by optimizing the structural design, efficient preparation and purification of high-purity nitrogen are realized, and the device has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas purification technical field especially, it relates to a kind of high-purity nitrogen gas purification device, it is particularly suitable for the occasion of high purity requirement to nitrogen in industrial production, food preservation, electronic manufacturing etc. BACKGROUND

[0002] Nitrogen is an important gas widely used in industrial production, food preservation, electronic manufacturing etc. The preparation of high-purity nitrogen usually needs to be purified by multiple stages, including oxygen removal, dust removal, dehumidification etc. In prior art, nitrogen purification device has the following problems:

[0003] 1, low oxygen removal efficiency: traditional oxygen removal device usually adopts single-stage oxygen removal structure, and the oxygen removal effect is limited, which is difficult to meet the requirements of high-purity nitrogen;

[0004] 2, insufficient heat management: in the oxygen removal process, electric heating rod will generate a large amount of heat, if the heat cannot be dissipated in time, it will cause the temperature of the equipment to be too high, affecting the service life of the equipment and the purity of nitrogen;

[0005] 3, dust filtration precision is not enough: the filtration precision of existing dust filter is low, which cannot effectively remove small particles, resulting in the decrease of nitrogen purity;

[0006] 4, poor continuity of equipment operation: the oxygen removal device is usually designed with a single group, which needs to be stopped during maintenance or replacement, affecting the production efficiency.

[0007] For example, the existing patent (announcement number: CN 107853863 A) discloses a nitrogen purification device, but its oxygen removal device has low efficiency, and lacks effective cooling system, resulting in unsatisfactory nitrogen purification effect.

[0008] In order to solve the above problems, the utility model provides a kind of high-purity nitrogen gas purification device, improves nitrogen purification efficiency by optimizing structure design, ensures the high purity and stability of nitrogen. UTILITY MODEL CONTENT

[0009] The utility model provides a technical scheme to solve the above problems to overcome the above shortcomings.

[0010] The utility model aims to provide a kind of high-purity nitrogen gas purification device, to solve the problems of low oxygen removal efficiency, insufficient filtration precision and complex equipment structure in prior art.

[0011] The technical scheme of the utility model is as follows:

[0012] A kind of high-purity nitrogen gas purification device, including nitrogen generator, first gas pump, oxygen removal device, heat exchanger, dust filter, second gas pump and nitrogen storage tank;

[0013] The first air pump is connected between the nitrogen generator and the oxygen removal device, and the oxygen removal device comprises at least two groups of oxygen removal cylinders arranged in parallel, and an electric heating rod and a copper mesh are arranged in the oxygen removal cylinder.

[0014] The heat exchanger is connected between the oxygen removal device and the dust filter, and the second air pump is connected between the dust filter and the nitrogen storage tank.

[0015] Further, at least one layer of copper mesh is arranged in the oxygen removal cylinder of the oxygen removal device, the copper mesh is arranged in an equidistant array along the gas flow direction, and the electric heating rod penetrates all the copper meshes.

[0016] Further, the heat exchanger is connected with a cooling medium circulating system, and the cooling medium circulating system continuously provides cooling medium for the heat exchanger.

[0017] Further, the oxygen removal device is provided with two groups, and a three-way pipe is connected between the two groups of oxygen removal devices and the first air pump, and a switching valve is fixedly installed on the three-way pipe.

[0018] Further, a pre-filter is connected between the nitrogen generator and the first air pump.

[0019] Further, a humidity sensor is arranged between the dust filter and the second air pump.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] 1. The oxygen removal cylinders and the electric heating rods arranged in parallel improve the oxygen removal efficiency;

[0022] 2. The heat exchanger is used for heat exchange and cooling, effectively reducing the temperature of the nitrogen gas;

[0023] 3. The dust filter is used for filtering, ensuring the purity of the nitrogen gas;

[0024] 4. The structure is compact, easy to maintain, and suitable for industrial production.

[0025] The present application realizes efficient preparation and purification of high-purity nitrogen gas through optimized structure design, and has wide application prospect.

[0026] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0028] Fig. 1 is a structural schematic diagram of the present application;

[0029] Fig. 2 is a structural schematic diagram of another view of the present application;

[0030] Fig. 3 is a structural schematic diagram of the oxygen removal device.

[0031] In the drawings: 1, nitrogen making machine; 2, first air pump; 3, oxygen removal device; 31, oxygen removal cylinder; 32, electric heating rod; 33, copper mesh; 4, heat exchanger; 5, dust filter; 6, second air pump; 7, nitrogen storage tank; 8, three-way pipeline; 9, switching valve; 10, pre-filter; 11, humidity sensor; 12, cooling medium circulating system; 13, safety valve. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described clearly and completely in combination with the drawings, obviously, the described embodiments are only some embodiments of the present application, not all the embodiments.

[0033] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0034] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Example 1, as Figs. 1-3 As shown, a high-purity nitrogen purification device of this utility model includes a nitrogen generator 1, a first gas pump 2, an oxygen removal device 3, a heat exchanger 4, a dust filter 5, a second gas pump 6, and a nitrogen storage tank 7.

[0038] The first air pump 2 is connected between the nitrogen generator 1 and the deoxygenation device 3. The deoxygenation device 3 includes at least two sets of deoxygenation cylinders 31 arranged in parallel. The deoxygenation cylinder 31 is provided with an electric heating rod 32 and a copper mesh 33.

[0039] The heat exchanger 4 is connected between the deoxygenation device 3 and the dust filter 5, and the second air pump 6 is connected between the dust filter 5 and the nitrogen storage tank 7.

[0040] Furthermore, the deoxygenation device 3 has at least one layer of copper mesh 33 inside the deoxygenation cylinder 31. The copper mesh 33 is distributed in an array at equal intervals along the gas flow direction, and the heating rod 32 is installed through all the copper mesh 33; this can achieve a uniform heating effect and ensure effective deoxygenation.

[0041] Furthermore: the heat exchanger 4 is a shell-and-tube heat exchanger 4, and a cooling medium and nitrogen are introduced into the heat exchanger 4. The cooling medium carries away the heat of the nitrogen through the heat exchanger 4.

[0042] Furthermore, the heat exchanger 4 is connected to a cooling medium circulation system 12, which continuously provides cooling medium to the heat exchanger 4, thus achieving rapid heat dissipation.

[0043] Furthermore, the dust filter 5 is a high-efficiency filter with a filtration accuracy of less than 5 micrometers; it has high filtration accuracy to ensure the purity of nitrogen during storage.

[0044] Furthermore, the nitrogen generator 1 is either a pressure swing adsorption nitrogen generator 1 or a membrane separation nitrogen generator 1.

[0045] Furthermore, the deoxygenation device 3 is provided in two sets, and a three-way pipe 8 is connected between the two sets of deoxygenation devices 3 and the first air pump 2. A switching valve 9 is fixedly installed on the three-way pipe 8, so that the two sets of deoxygenation devices 3 can operate alternately, ensuring that the equipment can work stably for a long time.

[0046] Furthermore, a pre-filter 10 is connected between the nitrogen generator 1 and the first gas pump 2, allowing the gas to pass through the pre-filter before entering the deoxygenation device 3 for deoxygenation, thereby improving the purity of nitrogen.

[0047] Furthermore, a humidity sensor 11 is installed between the dust filter 5 and the second air pump 6; this sensor can monitor the temperature of the nitrogen gas in real time, preventing it from becoming too hot and extending the equipment's lifespan.

[0048] Furthermore, the nitrogen storage tank 7 is equipped with a safety valve 13, which can ensure the safety of the nitrogen storage tank 7 and prevent excessive gas pressure.

[0049] Example 2, as Figs. 1-3 As shown, the present invention provides a high-purity nitrogen purification device, comprising a nitrogen generator 1, a first gas pump 2, an oxygen removal device 3, a heat exchanger 4, a dust filter 5, a second gas pump 6, and a nitrogen storage tank 7.

[0050] Nitrogen generator 1: Used to prepare nitrogen gas, it can be either a pressure swing adsorption nitrogen generator 1 or a membrane separation nitrogen generator 1. A pre-filter 10 is connected between the nitrogen generator 1 and the first gas pump 2 to preliminarily filter large particulate impurities in the nitrogen gas.

[0051] First gas pump 2: Connected between nitrogen generator 1 and deoxygenation device 3, used to deliver nitrogen to deoxygenation device 3.

[0052] Deoxygenation device 3: includes at least two sets of deoxygenation cylinders 31 arranged in parallel. Each deoxygenation cylinder 31 is equipped with an electric heating rod 32 and a copper mesh 33. The copper mesh 33 is distributed in an array at equal intervals along the gas flow direction. The electric heating rod 32 is arranged through all the copper mesh 33 to heat nitrogen and remove oxygen.

[0053] Heat exchanger 4: A shell-and-tube heat exchanger 4 is used, which is connected between the deaerator 3 and the dust filter 5. Cooling medium and nitrogen are introduced into the heat exchanger 4. The cooling medium carries away the heat of the nitrogen through the heat exchanger 4 to ensure that the nitrogen temperature is suitable.

[0054] Dust Filter 5: Employs a high-efficiency filter with a filtration accuracy of less than 5 microns, used to remove tiny particles from nitrogen gas.

[0055] Second air pump 6: Connected between dust filter 5 and nitrogen storage tank 7, used to deliver purified nitrogen to nitrogen storage tank 7.

[0056] Nitrogen storage tank 7: for storing high-purity nitrogen, which is provided with a safety valve 13 to ensure the safety of the equipment operation.

[0057] Further optimization design:

[0058] The two sets of oxygen removal devices 3 are connected with the three-way pipe 8 between the two sets of oxygen removal devices 3 and the first air pump 2, and the switch valve 9 is fixedly installed on the three-way pipe 8, so that the two sets of oxygen removal devices 3 can be alternately used, and the continuity of the equipment operation is ensured.

[0059] The heat exchanger 4 is connected with the cooling medium circulating system 12, so that the cooling medium can be continuously provided for the heat exchanger 4, and the heat management efficiency is improved.

[0060] The humidity sensor 11 is arranged between the dust filter 5 and the second air pump 6, which is used for real-time monitoring of the moisture content in the nitrogen gas, and ensures the quality of the nitrogen gas.

[0061] The high-purity nitrogen purification device provided by the utility model has the following advantages:

[0062] 1. Efficient oxygen removal: a plurality of parallel oxygen removal cylinders 31 and copper mesh 33 are designed to improve oxygen removal efficiency and ensure high purity of nitrogen.

[0063] 2. Heat management optimization: the nitrogen gas temperature is effectively controlled through the tube-shell heat exchanger 4 and the cooling medium circulating system 12, and the service life of the equipment is prolonged.

[0064] 3. High-precision filtration: the efficient dust filter 5 is adopted, the filtration precision is less than 5 microns, and the nitrogen gas is ensured to be free of tiny particles.

[0065] 4. Continuous operation: through the setting of the two sets of oxygen removal devices 3 and the switch valve 9, the equipment can be maintained or replaced without stopping, and the production efficiency is improved.

[0066] 5. Real-time monitoring: the humidity sensor 11 is used for real-time monitoring of the moisture content in the nitrogen gas, and the quality of the nitrogen gas is ensured to be stable.

[0067] 6. Safety and reliability: the safety valve 13 is arranged on the nitrogen storage tank 7 to ensure the safety of the equipment operation.

[0068] As shown in the embodiment three, Figs. 1-3 The utility model discloses a high-purity nitrogen purification device, which comprises a nitrogen generator 1, a first air pump 2, an oxygen removal device 3, a heat exchanger 4, a dust filter 5, a second air pump 6 and a nitrogen storage tank 7.

[0069] The nitrogen generator 1 is a pressure swing adsorption nitrogen generator 1, and a pre-filter 10 is connected between the nitrogen generator 1 and the first air pump 2.

[0070] The deoxygenation device 3 includes two sets of deoxygenation cylinders 31 arranged in parallel. The deoxygenation cylinder 31 is equipped with an electric heating rod 32 and a copper mesh 33. The copper mesh 33 is distributed in an array at equal intervals along the gas flow direction.

[0071] Heat exchanger 4 is a shell-and-tube heat exchanger 4, and a cooling medium circulation system 12 is connected to heat exchanger 4;

[0072] The dust filter 5 is a high-efficiency filter with a filtration accuracy of less than 5 microns. A humidity sensor 11 is installed between the dust filter 5 and the second air pump 6.

[0073] A safety valve 13 is installed on the nitrogen storage tank 7.

[0074] Working principle: The nitrogen generated by nitrogen generator 1 is initially filtered by pre-filter 10 and then transported to deoxygenation device 3 by first air pump 2. In deoxygenation device 3, the nitrogen is deoxygenated by copper mesh 33 and heating rod 32. After deoxygenation, the nitrogen enters heat exchanger 4 for cooling, and cooling medium circulation system 12 continuously provides cooling medium. After cooling, the nitrogen is filtered by dust filter 5, and humidity sensor 11 monitors the nitrogen humidity in real time. Finally, high-purity nitrogen is transported to nitrogen storage tank 7 by second air pump 6 for storage.

[0075] Example 4, as Figs. 1-3 As shown, based on Embodiment 3, this utility model is equipped with two sets of deoxygenation devices 3, and a three-way pipe 8 and a switching valve 9 for switching. The two sets of deoxygenation devices 3 can be switched as needed to further improve the deoxygenation efficiency.

[0076] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0077] Nitrogen preparation: Nitrogen generator 1 prepares nitrogen through pressure swing adsorption or membrane separation technology. Pre-filter 10 performs preliminary filtration of nitrogen to remove large particulate impurities.

[0078] Deoxygenation process: The first gas pump 2 delivers nitrogen to the deoxygenation device 3, the electric heating rod 32 heats the nitrogen, and the copper mesh 33 catalyzes the reaction between oxygen and copper to remove oxygen.

[0079] Heat exchange: Heat exchanger 4 removes heat from nitrogen through the cooling medium provided by cooling medium circulation system 12, ensuring that the nitrogen temperature is suitable.

[0080] Dust filtration: Dust filter 5 efficiently filters nitrogen gas to remove fine particles.

[0081] Humidity monitoring: Humidity sensor 11 monitors the moisture content in nitrogen in real time to ensure nitrogen quality.

[0082] Nitrogen storage: the second gas pump 6 delivers the purified nitrogen to the nitrogen storage tank 7, and the safety valve 13 ensures the safe operation of the equipment.

[0083] The embodiment is not limited in shape, material, structure, etc. of the utility model in any form, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model are within the protection scope of the utility model technical scheme.

Claims

1. A high purity nitrogen gas purification apparatus, characterized by: It comprises a nitrogen generator (1), a first air pump (2), an oxygen removal device (3), a heat exchanger (4), a dust filter (5), a second air pump (6) and a nitrogen storage tank (7). The first air pump (2) is connected between the nitrogen generator (1) and the oxygen removal device (3), and the oxygen removal device (3) comprises at least two groups of parallelly arranged oxygen removal cylinders (31), and an electric heating rod (32) and a copper mesh (33) are arranged in each oxygen removal cylinder (31). The heat exchanger (4) is connected between the oxygen removal device (3) and the dust filter (5), and the second air pump (6) is connected between the dust filter (5) and the nitrogen storage tank (7).

2. The high-purity nitrogen gas purification device according to claim 1, wherein At least one layer of copper mesh (33) is arranged in the oxygen removal cylinder (31) of the oxygen removal device (3), the copper mesh (33) is arrayed equidistantly along the gas flow direction, and the electric heating rod (32) penetrates all the copper meshes (33).

3. The high-purity nitrogen gas purification device according to claim 1, wherein The heat exchanger (4) is a shell-and-tube heat exchanger, and cooling medium and nitrogen gas are introduced into the heat exchanger (4), and the cooling medium carries away the heat of the nitrogen gas through the heat exchanger (4).

4. The high-purity nitrogen gas purification device according to claim 3, wherein A cooling medium circulating system (12) is connected to the heat exchanger (4) to continuously provide cooling medium for the heat exchanger (4).

5. The high-purity nitrogen gas purification device according to claim 1, wherein The dust filter (5) is a high-efficiency filter, and the filtering precision of the dust filter (5) is less than 5 microns.

6. The high-purity nitrogen gas purification device according to claim 1, wherein The nitrogen generator (1) is any one of a pressure swing adsorption nitrogen generator or a membrane separation nitrogen generator.

7. The high-purity nitrogen gas purification device according to claim 1, wherein The oxygen removal device (3) is provided with two groups, and a three-way pipe (8) is connected between the two groups of oxygen removal devices (3) and the first air pump (2), and a switch valve (9) is fixedly installed on the three-way pipe (8).

8. The high-purity nitrogen gas purification device according to claim 1, wherein A pre-filter (10) is connected between the nitrogen generator (1) and the first air pump (2).

9. The high-purity nitrogen gas purification device according to claim 1, wherein A humidity sensor (11) is arranged between the dust filter (5) and the second air pump (6).

10. The high-purity nitrogen gas purification device according to claim 1, wherein A safety valve (13) is arranged on the nitrogen storage tank (7).

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