Air separation device with molecular sieve

Abstract

The utility model provides an air separation device with a molecular sieve, and relates to the field of air separation devices, and the air separation device comprises a first air compressor, an air storage tank, a filter assembly, an air adsorption tower, a waste nitrogen adsorption tower, a second air compressor, a third air compressor, an oxygen storage tank and a nitrogen storage tank. Then the air is stored in an air storage tank, then fed into a filtering assembly to filter impurities in the air and then fed into an air adsorption tower to be subjected to molecular screening for the first time, and screened oxygen molecules are fed into a third air compressor to be compressed; nitrogen containing impurities is fed into a waste nitrogen adsorption tower for secondary molecular screening, the nitrogen subjected to secondary screening is fed into a second air compressor to be compressed, and oxygen subjected to secondary screening by the waste nitrogen adsorption tower is also fed into a third air compressor to be compressed; according to the utility model, secondary molecular screening can be carried out through the air adsorption tower and the waste nitrogen adsorption tower, and the efficiency is higher.

Description

Technical Field

[0001] The present application relates to the field of air separation devices, and in particular to an air separation device with a molecular sieve. Background Art

[0002] The molecular sieve system is the main component of the air separation unit purification system. Its main function is to adsorb water, acetylene, carbon dioxide and other hydrocarbons in the air to ensure the air quality requirements of the subsequent system process. The regeneration (desorption) of the air separation molecular sieve refers to the regeneration of the adsorbent after adsorption saturation to restore the adsorption capacity. There are two methods of regeneration, heating regeneration and pressure reduction regeneration. Heating regeneration uses the principle that the adsorption capacity of the adsorbent decreases at high temperatures. The heated gas is passed into the adsorption layer to increase the temperature of the adsorption layer and desorb the adsorbed components.

[0003] The current molecular sieve system has low efficiency and long screening time during the screening process, so the current equipment needs to be improved. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an air separation device with a molecular sieve, which can solve the technical problems of low efficiency and long screening time.

[0005] An embodiment of the present application provides an air separation device with a molecular sieve, comprising a first air compressor, an air storage tank, a filter assembly, an air adsorption tower, a contaminated nitrogen adsorption tower, a second air compressor, a third air compressor, an oxygen storage tank, and a nitrogen storage tank, wherein an air outlet of the first air compressor is connected to an air inlet of the air storage tank, an air outlet of the air storage tank is connected to an air inlet of the filter assembly, an air outlet of the filter assembly is connected to the air adsorption tower, an air outlet at an upper end of the air adsorption tower is connected to an air inlet of the contaminated nitrogen adsorption tower, an air outlet of the contaminated nitrogen adsorption tower is connected to an air inlet of the second air compressor, an air outlet of the second air compressor is connected to an air inlet of the nitrogen storage tank, an air outlet at a side of the air adsorption tower is connected to an air inlet of the third air compressor, an air outlet at the third air compressor is connected to the oxygen storage tank, and an air outlet at a side of the contaminated nitrogen adsorption tower is connected to an air inlet of the third air compressor.

[0006] Preferably, a first solenoid valve is arranged between the air storage tank and the filter assembly, a second solenoid valve is arranged between the air adsorption tower and the dirty nitrogen adsorption tower, a third solenoid valve is arranged between the air adsorption tower and the third air compressor, a fourth solenoid valve is arranged between the second air compressor and the nitrogen storage tank and between the third air compressor and the oxygen storage tank, and a fifth solenoid valve is arranged between the dirty nitrogen adsorption tower and the third air compressor.

[0007] Preferably, an annular molecular sieve is arranged inside the air adsorption tower and the waste nitrogen adsorption tower.

[0008] Preferably, the air outlet at the upper end of the air adsorption tower and the air inlet at the lower end of the air adsorption tower are both inside the molecular sieve, and the air outlet at the side of the air adsorption tower is outside the molecular sieve.

[0009] Preferably, the gas outlet at the upper end of the contaminated nitrogen adsorption tower and the gas inlet at the lower end of the contaminated nitrogen adsorption tower are both inside the molecular sieve, and the gas outlet at the side of the contaminated nitrogen adsorption tower is outside the molecular sieve.

[0010] Preferably, a heating component is provided in the air adsorption tower and the waste nitrogen adsorption tower, and the heating component comprises an annular heating wire.

[0011] Preferably, the gas outlet end on the side of the air adsorption tower and the gas outlet end on the side of the waste nitrogen adsorption tower may be provided with a vacuum pump.

[0012] Beneficial effects of the utility model:

[0013] The utility model provides an air separation device with a molecular sieve, comprising a first air compressor, an air storage tank, a filter assembly, an air adsorption tower, a contaminated nitrogen adsorption tower, a second air compressor, a third air compressor, an oxygen storage tank, and a nitrogen storage tank, wherein the air outlet of the first air compressor is connected to the air inlet of the air storage tank, the air outlet of the air storage tank is connected to the air inlet of the filter assembly, the air outlet of the filter assembly is connected to the air adsorption tower, the air outlet at the upper end of the air adsorption tower is connected to the air inlet of the contaminated nitrogen adsorption tower, the air outlet of the contaminated nitrogen adsorption tower is connected to the air inlet of the second air compressor, the air outlet of the second air compressor is connected to the air inlet of the nitrogen storage tank, the air outlet of the side of the air adsorption tower is connected to the air inlet of the third air compressor, and the air outlet of the third air compressor is connected to the oxygen storage tank The air outlet end of the side of the dirty nitrogen adsorption tower is connected to the air inlet end of the third air compressor. When the utility model is in use, the air is compressed by the first air compressor, and then stored in the air storage tank, and then sent to the filter component to filter the impurities in the air, and then sent to the air adsorption tower for the first molecular screening, and the screened oxygen molecules are sent to the third air compressor for compression, and the nitrogen containing impurities is sent to the dirty nitrogen adsorption tower for the second molecular screening, and the nitrogen after the second screening is sent to the second air compressor for compression, and then sent to the nitrogen storage tank for storage, and the oxygen screened by the dirty nitrogen adsorption tower for the second time is also sent to the third air compressor for compression, and then sent to the oxygen storage tank for storage. The utility model can perform secondary molecular screening through the air adsorption tower and the dirty nitrogen adsorption tower, and the efficiency is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] The reference numerals are:

[0017] 1. The first air compressor; 2. The air storage tank; 3. The filter assembly; 4. The air adsorption tower; 5. The dirty nitrogen adsorption tower; 6. The second air compressor; 7. The third air compressor; 8. The oxygen storage tank; 9. The nitrogen storage tank; 10. The first solenoid valve; 11. The second solenoid valve; 12. The third solenoid valve; 13. The fourth solenoid valve; 14. The fifth solenoid valve; 15. The molecular sieve; 16. The vacuum pump. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] like Figure 1As shown, an air separation device with a molecular sieve 15 includes a first air compressor 1, an air storage tank 2, a filter component 3, an air adsorption tower 4, a contaminated nitrogen adsorption tower 5, a second air compressor 6, a third air compressor 7, an oxygen storage tank 8, and a nitrogen storage tank 9, wherein the air outlet end of the first air compressor 1 is connected to the air inlet end of the air storage tank 2, the air outlet end of the air storage tank 2 is connected to the air inlet end of the filter component 3, the air outlet end of the filter component 3 is connected to the air adsorption tower 4, the air outlet end at the upper end of the air adsorption tower 4 is connected to the air inlet end of the contaminated nitrogen adsorption tower 5, the air outlet end of the contaminated nitrogen adsorption tower 5 is connected to the air inlet end of the second air compressor 6, the air outlet end of the second air compressor 6 is connected to the air inlet end of the nitrogen storage tank 9, the air outlet end of the side of the air adsorption tower 4 is connected to the air inlet end of the third air compressor 7, and the air outlet end of the third air compressor 7 is connected to the oxygen storage tank 8 The air outlet end of the side of the dirty nitrogen adsorption tower 5 is connected to the air inlet end of the third air compressor 7. When the utility model is in use, the air is compressed by the first air compressor 1, and then stored in the air storage tank 2, and then sent to the filter component 3 to filter the impurities in the air, and then sent to the air adsorption tower 4 for the first molecular sieve 15 selection, and the screened oxygen molecules are sent to the third air compressor 7 for compression, and the nitrogen containing impurities is sent to the dirty nitrogen adsorption tower 5 for the second molecular sieve 15 selection, and the nitrogen after the second screening is sent to the second air compressor 6 for compression, and then sent to the nitrogen storage tank 9 for storage, and the oxygen screened by the dirty nitrogen adsorption tower 5 for the second time is also sent to the third air compressor 7 for compression, and then sent to the oxygen storage tank 8 for storage. The utility model can perform secondary molecular sieve 15 selection through the air adsorption tower 4 and the dirty nitrogen adsorption tower 5, and the efficiency is relatively high.

[0025] like Figure 1 As shown, in this embodiment, a first solenoid valve 10 is arranged between the air storage tank 2 and the filter assembly 3, a second solenoid valve 11 is arranged between the air adsorption tower 4 and the dirty nitrogen adsorption tower 5, a third solenoid valve 12 is arranged between the air adsorption tower 4 and the third air compressor 7, a fourth solenoid valve 13 is arranged between the second air compressor 6 and the nitrogen storage tank 9 and between the third air compressor 7 and the oxygen storage tank 8, and a fifth solenoid valve 14 is arranged between the dirty nitrogen adsorption tower 5 and the third air compressor 7. Specifically, during use, the first solenoid valve 10, the second solenoid valve 11, the third solenoid valve 12, the fourth solenoid valve 13, and the fifth solenoid valve 14 can be opened or closed respectively.

[0026] like Figure 1As shown, in this embodiment, an annular molecular sieve 15 is arranged inside the air adsorption tower 4 and the waste nitrogen adsorption tower 5, the air outlet end at the upper end of the air adsorption tower 4 and the air inlet end at the lower end of the air adsorption tower 4 are both inside the molecular sieve 15, and the air outlet end at the side of the air adsorption tower 4 is outside the molecular sieve 15, the air outlet end at the upper end of the waste nitrogen adsorption tower 5 and the air inlet end at the lower end of the waste nitrogen adsorption tower 5 are both inside the molecular sieve 15, and the air outlet end at the side of the waste nitrogen adsorption tower 5 is outside the molecular sieve 15. The molecular sieve 15 of the utility model can be used to separate oxygen or nitrogen. Specifically, oxygen and nitrogen can be gasified by heating in the air storage tank 2, and other rare gases can be separated.

[0027] like Figure 1 As shown, in this embodiment, a heating component is provided in the air adsorption tower 4 and the waste nitrogen adsorption tower 5. The heating component includes a ring-shaped heating wire. During the separation process, the temperature of the gas can be increased by the heating component to provide Brownian motion of the molecules.

[0028] like Figure 1 As shown, in this embodiment, the air outlet end on the side of the air adsorption tower 4 and the air outlet end on the side of the waste nitrogen adsorption tower 5 can be provided with a vacuum pump 16. The vacuum pump 16 of the utility model can reduce the pressure outside the molecular sieve 15 and increase the rate at which oxygen escapes outward.

[0029] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air separation device with a molecular sieve, characterized in that: It includes a first air compressor, an air storage tank, a filter assembly, an air adsorption tower, a contaminated nitrogen adsorption tower, a second air compressor, a third air compressor, an oxygen storage tank, and a nitrogen storage tank. The air outlet of the first air compressor is connected to the air inlet of the air storage tank, the air outlet of the air storage tank is connected to the air inlet of the filter assembly, the air outlet of the filter assembly is connected to the air adsorption tower, the air outlet at the upper end of the air adsorption tower is connected to the air inlet of the contaminated nitrogen adsorption tower, the air outlet of the contaminated nitrogen adsorption tower is connected to the air inlet of the second air compressor, the air outlet of the second air compressor is connected to the air inlet of the nitrogen storage tank, the air outlet on the side of the air adsorption tower is connected to the air inlet of the third air compressor, the air outlet of the third air compressor is connected to the oxygen storage tank, and the air outlet on the side of the contaminated nitrogen adsorption tower is connected to the air inlet of the third air compressor.

2. An air separation device with a molecular sieve according to claim 1, characterized in that: A first solenoid valve is arranged between the air storage tank and the filter assembly, a second solenoid valve is arranged between the air adsorption tower and the dirty nitrogen adsorption tower, a third solenoid valve is arranged between the air adsorption tower and the third air compressor, a fourth solenoid valve is arranged between the second air compressor and the nitrogen storage tank and between the third air compressor and the oxygen storage tank, and a fifth solenoid valve is arranged between the dirty nitrogen adsorption tower and the third air compressor.

3. An air separation device with a molecular sieve according to claim 1, characterized in that: Annular molecular sieves are arranged inside the air adsorption tower and inside the waste nitrogen adsorption tower.

4. An air separation device with a molecular sieve according to claim 3, characterized in that: The air outlet at the upper end of the air adsorption tower and the air inlet at the lower end of the air adsorption tower are both inside the molecular sieve, and the air outlet at the side of the air adsorption tower is outside the molecular sieve.

5. The air separation device with molecular sieve according to claim 3, characterized in that: The gas outlet at the upper end of the contaminated nitrogen adsorption tower and the gas inlet at the lower end of the contaminated nitrogen adsorption tower are both inside the molecular sieve, and the gas outlet at the side of the contaminated nitrogen adsorption tower is outside the molecular sieve.

6. An air separation device with a molecular sieve according to claim 1, characterized in that: A heating component is arranged in the air adsorption tower and the waste nitrogen adsorption tower, and the heating component comprises a ring-shaped heating wire.

7. An air separation device with a molecular sieve according to claim 1, characterized in that: The gas outlet end on the side of the air adsorption tower and the gas outlet end on the side of the waste nitrogen adsorption tower may be provided with a vacuum pump.

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