Membrane oxygen enrichment system

Abstract

The utility model relates to the field of oxygen enrichment systems, particularly discloses a membrane oxygen enrichment system, and solves the technical problems that a membrane oxygen enrichment system is relatively complex and relatively high in cost in the current oxygen enrichment process. The membrane oxygen enrichment system comprises a pressurization unit, an impurity removal unit and a separation unit which are sequentially arranged in the air inlet direction; the impurity removal unit comprises an oil-water separator, a freezing dryer and an activated carbon adsorption tank which are connected in series. The separation unit comprises a membrane assembly and a gas concentration sensor used for detecting the gas concentration of an oxygen-enriched gas outlet of the membrane assembly, due to the gas pre-filtering device, generation of oxygen-enriched gas can be completed only through one-stage and one-section membrane assemblies, and the overall cost and energy consumption of the system are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen -enrichment system technical field, specifically, relate to a membrane oxygen -enrichment system. BACKGROUND

[0002] The core principle of the membrane separation oxygen -enrichment system is to utilize the permeation rate difference of each component in air when permeating through a specific membrane material, and realize the effective separation and enrichment of oxygen under the driving of pressure difference. With the progress of science and technology and the continuous improvement of membrane material performance, membrane separation oxygen -enrichment technology has gradually transitioned from laboratory research to practical industrial application, and has become an indispensable part in the field of modern gas separation.

[0003] The prior art CN 216630274 U discloses a membrane separation system and an oxygen -enriched air preparation system. The system is designed ingeniously, by connecting a primary membrane with a secondary membrane in series, and setting multiple control valves on the connecting pipeline, the precise regulation and control of gas flow are realized. Specifically, the first communication pipe connects the primary membrane inlet and the secondary membrane inlet, and is equipped with a second valve; the second communication pipe connects the nitrogen -rich outlets of the two membrane assemblies, and is provided with a third valve; in addition, the third communication pipe connects the oxygen -rich outlet of the secondary membrane and the corresponding outlet of the primary membrane, and is installed with a fourth valve. Although this multi-stage membrane configuration can improve the separation efficiency, its complexity also brings higher cost and operation and maintenance challenges. The existing multi-stage membrane system is limited in its more extensive application due to the problems of complex process, high cost and great difficulty in maintenance. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a membrane oxygen -enrichment system, solving the technical problems of complex membrane oxygen -enrichment system and high cost in the current oxygen -enrichment process.

[0005] The utility model provides a membrane oxygen -enrichment system, comprising a booster unit, a impurity removal unit and a separation unit which are sequentially arranged along the air inlet direction, the impurity removal unit comprises oil -water separator, cold dryer and activated carbon adsorption tank which are connected in series, first filter is equipped between the oil -water separator and the cold dryer, and multiple filters are equipped between the separation unit and the impurity removal unit.

[0006] The separation unit comprises a membrane assembly and a gas concentration sensor for detecting the gas concentration of the oxygen -enriched gas outlet of the membrane assembly.

[0007] According to one embodiment of the utility model, the impurity removal unit is connected with the separation unit through a heat exchanger.

[0008] According to one embodiment of the utility model, the oil -water separator and the cold dryer are further provided with a gas cooling tower.

[0009] According to one embodiment of the present invention, the oil-water separator is connected to a gas cooling tower via a heat exchanger.

[0010] According to one embodiment of the present invention, the pressurization unit includes an air compressor.

[0011] According to one embodiment of the present invention, an air intake filter is connected in series at the air intake end of the air compressor.

[0012] According to one embodiment of the present invention, the inlet, oxygen-enriched outlet, and nitrogen-enriched outlet of the membrane module are all equipped with valves.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0014] This invention provides a membrane oxygen enrichment system that, through the coordinated operation of a pressurization unit, a purification unit, and a separation unit, can efficiently remove impurities from the air and achieve oxygen separation and enrichment. Specifically, the air is first pressurized by the pressurization unit, and then sequentially passes through multiple processes in the purification unit, including an oil-water separator, a gas cooling tower, a refrigerated dryer, and an activated carbon adsorption tank, effectively removing impurities such as oil, water, and odors. The purification unit is connected to the separation unit via a heat exchanger, and the oil-water separator is connected to the gas cooling tower via the heat exchanger. During the process of air entering the heat exchanger from the oil-water separator, the heat exchanger pre-cools the gas, using the recovered heat for the next stage. In the next stage, the gas enters the heat exchanger from the activated carbon adsorption tank, where the heat exchanger heats the gas, facilitating purification. The membrane module in the separation unit can efficiently separate oxygen and nitrogen. The gas concentration at the oxygen enrichment outlet is monitored in real time by a gas concentration sensor located downstream of the membrane module, ensuring the quality of the oxygen-enriched gas. In addition, valves are provided at the inlet, oxygen-enriched outlet, and nitrogen-enriched outlet of the membrane module for easy operation and maintenance. The entire system is compact in design and stable in operation, providing users with an efficient and reliable solution for generating oxygen-enriched gas. Due to the gas pre-filtration device, oxygen-enriched gas can be generated through only one stage of membrane module, reducing the overall system cost and energy consumption. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the internal structure of the membrane oxygen-enrichment system provided in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the membrane oxygen-enriching system provided in an embodiment of the present invention;

[0018] icon:

[0019] 100. Air intake filter;

[0020] 200. Compressor;

[0021] 300. Oil-water separator;

[0022] 400. Gas cooling tower;

[0023] 500, buffer tank;

[0024] 600. First filter;

[0025] 700. Refrigerated dryer;

[0026] 800. Heat exchanger;

[0027] 900. Activated carbon adsorption tank;

[0028] 1000, multi-stage filter;

[0029] 1100. Membrane module;

[0030] 1200. Gas concentration sensor. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Example 1

[0033] This utility model provides a membrane oxygen enrichment system to reduce the overall system cost and energy consumption.

[0034] Please see Figure 1 The membrane oxygen enrichment system provided in this embodiment includes a pressurization unit, a purification unit and a separation unit arranged sequentially along the air intake direction; the purification unit includes an oil-water separator 300, a refrigerated dryer 700 and an activated carbon adsorption tank 900 connected in series.

[0035] In this embodiment, the separation unit includes a membrane module 1100 and a gas concentration sensor 1200 for detecting the gas concentration at the oxygen-enriched outlet of the membrane module 1100. The membranes inside the membrane module 1100 are connected in parallel. In this embodiment, the first-stage membrane module 1100 is model HHMO2-93-PT-40566-600 or HHMO2-50-360. The membrane separation material has high selectivity and high flux, which can efficiently separate oxygen and improve production efficiency. A first filter 600 is provided between the oil-water separator 300 and the refrigerated dryer 700, and a multi-stage filter 1000 is provided between the separation unit and the impurity removal unit.

[0036] In this embodiment, the impurity removal unit is connected to the separation unit via a heat exchanger 800 to heat the gas.

[0037] In this embodiment, a gas cooling tower 400 is also provided between the oil-water separator 300 and the refrigerated dryer 700 to cool the gas.

[0038] In this embodiment, the oil-water separator 300 is connected to the gas cooling tower 400 via the heat exchanger 800 to recover heat for the next stage of gas heating.

[0039] In this embodiment, the pressurization unit includes an air compressor 200.

[0040] In this embodiment, an air intake filter 100 is connected in series at the air intake end of the air compressor 200.

[0041] In this embodiment, the inlet, oxygen-enriched outlet, and nitrogen-enriched outlet of the membrane module 1100 are all equipped with valves.

[0042] In this embodiment, the components include an air intake filter 100, a compressor 200, an oil-water separator 300, a heat exchanger 800, a gas cooling tower 400, a buffer tank 500, a first filter 600, a refrigerated dryer 700, an activated carbon adsorption tank 900, a multi-stage filter 1000, and a membrane module 1100.

[0043] In this embodiment, the outlet of the gas cooling tower 400 is connected to the buffer tank 500, and the buffer tank 500 is connected to the first filter 600. The first filter 600 is used to filter large particles and liquid water, protect the refrigerated dryer 700, and can also purify the air to a certain extent.

[0044] In this embodiment, the refrigerated dryer 700 is connected to the activated carbon adsorption tank 900, and the activated carbon adsorption tank 900 is connected to the multi-stage filter 1000. The multi-stage filter 1000 is a five-stage filter that filters out water vapor, micro-impurities, bacteria, viruses, odors, and discoloration.

[0045] In this embodiment, the air filtered by the five-stage filter is introduced into the heat exchanger 800. Only one heat exchanger 800 is provided. Firstly, the gas is cooled. The air introduced from the oil-water separator 300 is cooled in the heat exchanger 800, and the recovered heat is used to heat the air introduced from the five-stage filter into the heat exchanger 800, achieving heat recovery and utilization. The air exits through the membrane module 1100. Different components in the air permeate through the membrane at different rates. Specifically, oxygen molecules permeate faster than nitrogen and argon molecules under pressure differential. (Pressure Example 1)

[0046] This utility model provides a membrane oxygen enrichment system to reduce the overall system cost and energy consumption.

[0047] Please see Figure 1 The membrane oxygen enrichment system provided in this embodiment includes a pressurization unit, a purification unit and a separation unit arranged sequentially along the air intake direction; the purification unit includes an oil-water separator 300, a refrigerated dryer 700 and an activated carbon adsorption tank 900 connected in series.

[0048] In this embodiment, the separation unit includes a membrane module 1100 and a gas concentration sensor 1200 for detecting the gas concentration at the oxygen-enriched outlet of the membrane module 1100. The membranes inside the membrane module 1100 are connected in parallel. In this embodiment, the first-stage membrane module 1100 is model HHMO2-93-PT-40566-600 or HHMO2-50-360. The membrane separation material has high selectivity and high flux, which can efficiently separate oxygen and improve production efficiency.

[0049] In this embodiment, the impurity removal unit is connected to the separation unit via a heat exchanger 800 to heat the gas.

[0050] In this embodiment, a gas cooling tower 400 is also provided between the oil-water separator 300 and the refrigerated dryer 700 to cool the gas.

[0051] In this embodiment, the oil-water separator 300 is connected to the gas cooling tower 400 via the heat exchanger 800 to recover heat for the next stage of gas heating.

[0052] In this embodiment, the pressurization unit includes an air compressor 200.

[0053] In this embodiment, an air intake filter 100 is connected in series at the air intake end of the air compressor 200.

[0054] In this embodiment, the inlet, oxygen-enriched outlet, and nitrogen-enriched outlet of the membrane module 1100 are all equipped with valves.

[0055] In this embodiment, the components include an air intake filter 100, a compressor 200, an oil-water separator 300, a heat exchanger 800, a gas cooling tower 400, a buffer tank 500, a first filter 600, a refrigerated dryer 700, an activated carbon adsorption tank 900, a multi-stage filter 1000, and a membrane module 1100.

[0056] In this embodiment, the outlet of the gas cooling tower 400 is connected to the buffer tank 500, and the buffer tank 500 is connected to the first filter 600. The first filter 600 is used to filter large particles and liquid water, protect the refrigerated dryer 700, and can also purify the air to a certain extent.

[0057] In this embodiment, the refrigerated dryer 700 is connected to the activated carbon adsorption tank 900, and the activated carbon adsorption tank 900 is connected to the multi-stage filter 1000. The multi-stage filter 1000 is a five-stage filter that filters out water vapor, micro-impurities, bacteria, viruses, odors, and discoloration.

[0058] In this embodiment, the air filtered by the five-stage filter is introduced into the heat exchanger 800. Only one heat exchanger 800 is provided. In the first aspect, the gas is cooled. The air introduced from the oil-water separator 300 is cooled in the heat exchanger 800. The recovered heat is used to drive the oxygen in the air to preferentially pass through the membrane to obtain oxygen-enriched air under the five-stage differential pressure. The oxygen-enriched air is discharged from the oxygen-enriched outlet and is monitored in real time by the gas concentration sensor 1200 to ensure the quality of the oxygen-enriched gas. The nitrogen-enriched air is discharged from the nitrogen-enriched outlet.

[0059] The following is a detailed description of the usage process of the membrane oxygen enrichment system in Embodiment 1 of this utility model:

[0060] Air is compressed by the intake filter 100 and compressor 200, then removed from oil and water by the oil-water separator 300, and then cooled by the heat exchanger 800. After cooling, the air is cooled by the gas cooling tower 400 and then enters the first filter 600. The first filter 600 is used to filter large particles and liquid water, protect the refrigerated dryer 700, and purify the air to a certain extent. The air is then passed through the refrigerated dryer 700 and activated carbon adsorption tank 900 in sequence to remove water and dust. After further filtration by the filter, the air is further purified. It is then heated by the heat exchanger 800 and then passed into the membrane module 1100. Oxygen-enriched air is discharged from the oxygen-enriched outlet and monitored in real time by the gas concentration sensor 1200 to ensure the quality of the oxygen-enriched gas. Nitrogen-enriched air is discharged from the nitrogen-enriched outlet.

[0061] Example 2

[0062] This utility model provides a membrane oxygen enrichment system to reduce the overall system cost and energy consumption.

[0063] Please see Figure 2The membrane oxygen-enriching system provided in Embodiment 2 of this utility model differs from Embodiment 1 only in that, in this embodiment, the oxygen-enriched air detected by the gas concentration sensor 1200 is discharged through the buffer tank 500, which helps to maintain the pressure stability within the system and avoid pressure fluctuations caused by instantaneous flow rate changes from affecting the normal operation of downstream equipment.

[0064] The embodiments of this utility model have at least the following advantages:

[0065] This invention provides a membrane oxygen enrichment system that, through the coordinated operation of a pressurization unit, a purification unit, and a separation unit, can efficiently remove impurities from the air and achieve oxygen separation and enrichment. Specifically, the air is first pressurized by the pressurization unit, and then sequentially passes through multiple processes in the purification unit, including an oil-water separator, a gas cooling tower, a refrigerated dryer, and an activated carbon adsorption tank, effectively removing impurities such as oil, water, and odors. The purification unit is connected to the separation unit via a heat exchanger, and the oil-water separator is connected to the gas cooling tower via the heat exchanger. During the process of air entering the heat exchanger from the oil-water separator, the heat exchanger pre-cools the gas, using the recovered heat for the next stage. In the next stage, the gas enters the heat exchanger from the activated carbon adsorption tank, where the heat exchanger heats the gas, facilitating purification. The membrane module in the separation unit can efficiently separate oxygen and nitrogen. The gas concentration at the oxygen enrichment outlet is monitored in real time by a gas concentration sensor located downstream of the membrane module, ensuring the quality of the oxygen-enriched gas. In addition, valves are provided at the inlet, oxygen-enriched outlet, and nitrogen-enriched outlet of the membrane module for easy operation and maintenance. The entire system is compact in design and stable in operation, providing users with an efficient and reliable solution for generating oxygen-enriched gas. Due to the gas pre-filtration device, oxygen-enriched gas can be generated through only one stage of membrane module, reducing the overall system cost and energy consumption.

[0066] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A membrane oxygen enrichment system, characterized in that, It includes a pressurization unit, a purification unit, and a separation unit arranged sequentially along the air intake direction; The impurity removal unit includes an oil-water separator, a refrigerated dryer, and an activated carbon adsorption tank connected in series. A first filter is provided between the oil-water separator and the refrigerated dryer, and a multi-stage filter is provided between the separation unit and the impurity removal unit. The separation unit includes a membrane module and a gas concentration sensor for detecting the gas concentration at the oxygen-enriched outlet of the membrane module.

2. The membrane oxygen enrichment system according to claim 1, characterized in that, The impurity removal unit is connected to the separation unit via a heat exchanger.

3. The membrane oxygen enrichment system according to claim 1, characterized in that, A gas cooling tower is also provided between the oil-water separator and the refrigerated dryer.

4. The membrane oxygen enrichment system according to claim 3, characterized in that, The oil-water separator is connected to a gas cooling tower via a heat exchanger.

5. The membrane oxygen enrichment system according to any one of claims 1 to 4, characterized in that, The pressurization unit includes an air compressor.

6. The membrane oxygen enrichment system according to claim 5, characterized in that, An air intake filter is connected in series at the air intake end of the air compressor.

7. The membrane oxygen enrichment system according to any one of claims 1 to 4, characterized in that, The membrane module is equipped with valves at its air inlet, oxygen-enriched air outlet, and nitrogen-enriched air outlet.

Images