Molecular sieve oxygen generation system
By using a heat exchanger to heat waste nitrogen in the molecular sieve oxygen production system, the problems of poor dehumidification effect and high energy consumption in the prior art are solved, and more efficient moisture removal and energy consumption are achieved Reduce and extend the life of nitrogen absorption molecular sieve.
Patent Information
- Application Number
- CN202411447185.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-01-17
AI Technical Summary
When the existing molecular sieve oxygen-making system removes moisture in compressed air from the air compressor, the dehumidification effect is poor and the energy consumption is high, resulting in a short life of nitrogen-absorbing molecular sieve and the problems of ice blockage and compressed air consumption.
After heat exchanger is used to heat the waste nitrogen gas discharged from the oxygen generator through the heat exchanger, it is used to remove moisture from the alumina in the adsorption dryer, avoid direct connection of the waste nitrogen exhaust pipe, control the amount of waste nitrogen, and reduce energy consumption. And control the use of waste nitrogen through a bypass valve to improve the dehumidification effect.
It improves the dehumidification effect, extends the service life of nitrogen-absorbing molecular sieve, reduces energy consumption, avoids ice blockage, and is better than the dehumidification performance of traditional refrigeration dryers.
Smart Images
Figure CN119320120A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of molecular sieve oxygen production systems, and in particular relates to a molecular sieve oxygen production system. Background Art
[0002] In the molecular sieve oxygen production system, since the air compressor compressed air contains a large amount of moisture, the moisture will cause the molecular sieve of the oxygen generator to pulverize, causing the life of the nitrogen absorbing molecular sieve to drop sharply. The service life of the molecular sieve of conventional compressed air without dehumidification (such as diffuse molecular sieve oxygen production) is less than 1 year, while the service life of the molecular sieve of the centralized oxygen supply system after dehumidification can reach more than six years.
[0003] At present, there are two methods to remove moisture from the air compressor compressed air in the molecular sieve oxygen production system. One is the refrigerated dryer, which is used to intermittently cool the compressed air sent by the air compressor, that is, to discharge the cooling water vapor after cooling for a while. Why not cool it continuously? Because continuous cooling will cause water to freeze into ice on the condenser and form ice blockage. When the ice blockage is serious, the compressed air of the air compressor cannot pass through. The dehumidification effect is generally when the ambient humidity is 60%, and the humidity of the compressed air it treats can reach about 30%.
[0004] Another method is adsorption dryer dehumidification. The principle is to let the compressed air of the air compressor pass through the aluminum oxide in the adsorption dryer to absorb the moisture in the compressed air. When the aluminum oxide absorbs moisture close to saturation, the other tower of the adsorption dryer continues to absorb moisture in the compressed air. The aluminum oxide in the tower that has just absorbed moisture enters the regeneration state, allowing 10% of the compressed air to blow away the moisture in the aluminum oxide. Sometimes the compressed air blowing effect is not good during regeneration, and the compressed air must be heated before blowing away the moisture in the aluminum oxide. The advantage of this adsorption dryer is that there is no ice blockage, but it consumes 10% of the compressed air. If it is blown away with slight heat, it will cost extra electricity.
[0005] In summary, it is necessary to improve the existing molecular sieve oxygen production system to enhance the dehumidification effect and reduce energy consumption. Summary of the invention
[0006] The purpose of the present invention is to provide a molecular sieve oxygen production system to solve the above problems existing in the prior art.
[0007] In order to achieve the above object, the present invention adopts the following technical solutions:
[0008] A molecular sieve oxygen production system comprises a heat exchanger connected with a hot air input pipeline and a waste nitrogen input pipeline, wherein the hot air input pipeline is a hot air pipeline connected to an air compressor, and the inlet of the waste nitrogen input pipeline is connected to the waste nitrogen exhaust pipeline of the oxygen generator; the heat exchanger is also provided with an air output pipeline and a hot waste nitrogen output pipeline, and the air output pipeline and the hot waste nitrogen output pipeline are both connected to an adsorption dryer that transports dry air to the oxygen generator.
[0009] As a preferred technical solution in the present invention, the inlet of the waste nitrogen input pipeline is connected to the waste nitrogen exhaust pipeline of the oxygen generator through a bypass valve.
[0010] Beneficial effects: The present invention directly utilizes part of the waste nitrogen discharged by the oxygen generator, and is not directly connected to the waste nitrogen exhaust pipe of the oxygen generator, so as to avoid the excessive amount of waste nitrogen causing incomplete nitrogen discharge of the oxygen generator, thereby affecting the efficiency of the oxygen generator; the initial nitrogen discharge pressure of the oxygen generator is above 0.25Mpa, at this time, a bypass valve is used to allow part of the waste nitrogen to pass through the heat exchanger installed at the air compressor outlet to absorb part of the heat, and then go to the saturated alumina in the adsorption dryer to remove moisture, so as to prepare for the next process of alumina absorbing moisture in the compressed air, and the whole process does not increase the energy consumption of the adsorption dryer. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the present invention.
[0012] Figure: 1-heat exchanger; 101-hot air input pipeline; 102-waste nitrogen input pipeline; 103-air output pipeline; 104-hot waste nitrogen output pipeline; 2-air compressor; 3-oxygen generator; 4-adsorption dryer. DETAILED DESCRIPTION
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.
[0014] Example:
[0015] like Figure 1As shown, this embodiment provides a molecular sieve oxygen production system, characterized in that it includes a heat exchanger 1 connected to a hot air input pipeline 101 and a waste nitrogen input pipeline 102, the hot air input pipeline 101 is a hot air pipeline connected to the air compressor 2, which can be understood as installing a heat exchanger before the hot air pipeline of the existing air compressor passes through the radiator, the inlet of the waste nitrogen input pipeline 102 is connected to the waste nitrogen exhaust pipeline 301 of the oxygen generator 3, and preferably, the inlet of the waste nitrogen input pipeline 102 is connected to the waste nitrogen exhaust pipeline 301 of the oxygen generator 3 through a bypass valve, so as to control the amount of waste nitrogen; the heat exchanger 1 is also provided with an air output pipeline 103 and a hot waste nitrogen output pipeline 104, and the air output pipeline 103 and the hot waste nitrogen output pipeline 104 are both connected to the adsorption dryer 4 that conveys dry air to the oxygen generator 3.
[0016] The present invention directly utilizes part of the waste nitrogen discharged by the oxygen generator 3, and is not directly connected to the waste nitrogen exhaust pipe 301 of the oxygen generator 3, so as to avoid that the amount of waste nitrogen is too large, resulting in incomplete nitrogen discharge of the oxygen generator 3, thereby affecting the efficiency of the oxygen generator; the initial nitrogen discharge pressure of the oxygen generator 3 is above 0.25Mpa, at this time, a bypass valve is used to allow part of the waste nitrogen to pass through the heat exchanger 1 installed at the outlet of the air compressor 2 to absorb part of the heat, and then go to the saturated aluminum oxide in the adsorption dryer 4 to remove moisture, so as to prepare for the next process of aluminum oxide to absorb moisture in the compressed air, and the whole process does not increase the energy consumption of the adsorption dryer 4.
[0017] Taking a 15 cubic meter / hour oxygen generator system in practice as an example, the outlet temperature of the air compressor is 81°C (the temperature when the ambient temperature is 36°C), and the temperature of part of the waste nitrogen after heating by the heat exchanger is 52°C (the inlet temperature of the waste nitrogen is 38°C), with a temperature difference of 14°C. The regenerated fine-grained alumina after deep treatment of the waste nitrogen has a compressed air humidity of 17% to 23% after a 5-minute rotation at an ambient humidity of 57% in Jiangsu Province at an altitude of 30 meters. The dehumidification effect is better than that of traditional cold dryer dehumidification (the air humidity after dehumidification is 27.5%).
[0018] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A molecular sieve oxygen production system, characterized in that: It comprises a heat exchanger (1) connected to a hot air input pipeline (101) and a waste nitrogen input pipeline (102), wherein the hot air input pipeline (101) is a hot air pipeline connected to an air compressor (2), and the inlet of the waste nitrogen input pipeline (102) is connected to a waste nitrogen exhaust pipeline (301) of an oxygen generator (3); The heat exchanger (1) is also provided with an air output pipeline (103) and a hot waste nitrogen output pipeline (104), and both the air output pipeline (103) and the hot waste nitrogen output pipeline (104) are connected to an adsorption dryer (4) for delivering dry air to the oxygen generator (3).
2. A molecular sieve oxygen production system according to claim 1, characterized in that: The inlet of the waste nitrogen gas input pipeline (102) is connected to the waste nitrogen gas exhaust pipeline (301) of the oxygen generator (3) through a bypass valve.