Integrated oxygen-enriched skid-mounted equipment based on positive pressure film process

Abstract

The utility model relates to the technical field of gas separation, and aims to provide integrated oxygen-enriched skid-mounted equipment based on a positive pressure membrane process. The equipment comprises an integrated air compressor, a membrane oxygen enrichment assembly and a skid-mounted supporting structure, wherein the integrated air compressor comprises compressed air preparation equipment and a compressed air storage tank, the multiple membrane oxygen enrichment assemblies are arranged in parallel, and the skid-mounted supporting structure comprises a bottom plate and an assembly supporting frame; the compressed air preparation equipment, the compressed air storage tank and the assembly supporting frame are sequentially arranged on the bottom plate; the component support frame is vertically fixed on the bottom plate, and each membrane oxygen enrichment component is fixed on the component support frame. According to the equipment, the oxygen separation efficiency and yield can be improved, and the continuity and stability of the gas production process are ensured; the parallel stacking design of the skid-mounted device is combined, so that the space utilization rate is greatly optimized, and the whole mounting process of the oxygen enrichment machine is more flexible and convenient; the equipment installation period is shortened, the installation cost is reduced, and maintenance and upgrading are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of gas separation, in particular to an integrated oxygen-enriched skid-mounted device based on a positive pressure membrane process. Background Art

[0002] Gas membrane separation is a technology based on the separation of gas mixtures by components through a membrane with selective permeability under the drive of a pressure difference. Its working principle is that there are differences in the size, shape, polarity of different gas molecules and their interaction with the membrane material, resulting in different permeation rates of them in the membrane. For example, common gases such as oxygen and nitrogen have different permeation rates in specific membrane materials, thus realizing separation.

[0003] The membrane air separation nitrogen production and oxygen-enriched equipment has the following characteristics: advanced technology, which is the latest technology for normal-temperature air separation; no noise, completely static operation, meeting environmental protection requirements; no moving parts, less equipment maintenance; high reliability of continuous operation, long equipment service life, up to more than 10 years; simple capacity expansion, only need to parallelly add membrane elements and increase the raw material compressed air volume; compared with PSA, air and nitrogen buffer tanks can be not set, small volume, light weight, and it is the best choice for mobile nitrogen production and oxygen-enriched equipment; the gas products are clean, without generating any dust or particles; convenient and rapid start-up and shutdown, simple operation, and qualified gas can be produced in a short time; the equipment form can be designed according to the user's application requirements, convenient to adjust the number of membrane components, wide gas volume application range; the equipment has no special requirements for civil engineering, low installation cost; no special requirements for the environment, and can operate under harsh working conditions.

[0004] Just because the membrane air separation nitrogen production and oxygen-enriched equipment has the above many advantages, there are many membrane component manufacturers, rich and variable membrane group characteristics, and complex operating conditions at present, resulting in corresponding problems for end-users in equipment selection, operation and maintenance. In view of this situation, constructing an integrated oxygen-enriched machine with simple operation, universality and generality at the same time is an issue that must be solved to realize the industrialization and economic application of oxygen-enriched gas. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide an integrated oxygen-enriched skid-mounted device based on a positive pressure membrane process.

[0006] To solve the technical problem, the solution of the utility model is:

[0007] Provide an integrated oxygen-enriched skid-mounted device based on a positive pressure membrane process, including an integrated air compressor, a membrane oxygen-enriched component and a skid-mounted support structure; among them,

[0008] Integrated air compressor, including compressed air production equipment and compressed air storage tank, which are connected through a compressed air output pipeline; the compressed air storage tank is connected to the membrane oxygen enrichment module through a compressed air main pipeline;

[0009] The membrane oxygen enrichment module has multiple pieces and is arranged in parallel; each membrane oxygen enrichment module has a compressed air inlet, an oxygen-enriched gas outlet and a nitrogen-enriched gas outlet, which are respectively connected to a compressed air branch pipe, an oxygen-enriched gas transmission branch pipe and a nitrogen-enriched gas transmission branch pipe; the compressed air branch pipes of each membrane oxygen enrichment module are all connected to the compressed air main pipeline, the oxygen-enriched gas transmission branch pipes of each membrane oxygen enrichment module are all connected to the oxygen-enriched gas transmission main pipeline, and the nitrogen-enriched gas transmission branch pipes of each membrane oxygen enrichment module are all connected to the nitrogen-enriched gas transmission main pipeline;

[0010] Skid-mounted support structure, including a bottom plate and a component support frame; the compressed air production equipment, the compressed air storage tank and the component support frame are arranged on the bottom plate in sequence; the component support frame is vertically fixed on the bottom plate, and each membrane oxygen enrichment module is fixed on the component support frame.

[0011] As an improved scheme, the compressed air production equipment includes a box body, inside which there are a screw compressor, a refrigerated dryer, a filter and an oil removal tank, and they are connected in sequence through internal pipelines; corresponding temperature and pressure detection elements or motor operation parameter detection elements are provided on each operating equipment, and each detection element is connected to a host computer through a signal line.

[0012] As an improved scheme, there are reserved through holes, a control dial and a door opening structure on the box body; among them, the reserved through holes are used to pass through the air inlet pipeline and the compressed air output pipeline, the air inlet pipeline is connected to the inlet of the screw compressor, and the compressed air output pipeline is connected to the oil removal tank and the compressed air storage tank; the control dial includes a liquid crystal display and equipment start-stop buttons, and the door opening structure is used to provide a maintenance passage.

[0013] As an improved scheme, the ends of the compressed air branch pipe, the oxygen-enriched gas transmission branch pipe and the nitrogen-enriched gas transmission branch pipe are respectively installed at the compressed air inlet, the oxygen-enriched gas outlet and the nitrogen-enriched gas outlet of the membrane oxygen enrichment module in a screwed manner to achieve detachable connection.

[0014] As an improved scheme, an oxygen-enriched flowmeter, an oxygen-enriched pressure gauge and an electric on-off ball valve are successively installed on the oxygen-enriched gas transmission main pipeline; a nitrogen-enriched pressure gauge, a nitrogen-enriched flowmeter and an electric globe valve are successively installed on the nitrogen-enriched gas transmission main pipeline; the electric on-off ball valve is used to quickly open or close the flow of oxygen-enriched gas, and the electric globe valve is used to adjust the oxygen-enriched concentration and oxygen-enriched flow rate produced by the membrane oxygen enrichment module.

[0015] As an improved solution, the oxygen-rich flowmeter, oxygen-rich pressure gauge, nitrogen-rich pressure gauge, nitrogen-rich flowmeter, electric ball valve and electric globe valve are respectively connected to the upper computer through signal lines; the measuring equipment transmits measurement data to the upper computer, and the latter sends control signals to the electric ball valve or electric globe valve according to the control strategy.

[0016] As an improved solution, a reserved electric ball valve is also installed on the oxygen-rich gas transmission main pipe, and this valve is arranged in parallel with the electric ball valve.

[0017] As an improved solution, the component support frame includes two vertical channel steels, and at least three cross beams are arranged alternately between them; multiple groups of through holes are provided on each cross beam, and each membrane oxygen enrichment component is vertically fixed on each cross beam by a U-shaped clamp and a nut, and each U-shaped clamp passes through the corresponding through hole.

[0018] As an improved solution, a pipeline support frame is also included on the bottom plate of the skid-mounted support structure;

[0019] The pipeline support frame is a vertical channel steel, and a through hole is provided at its upper end. The pipeline to be supported is fixed on the pipeline support frame by a U-shaped clamp and a nut, and the U-shaped clamp passes through the corresponding through hole; or,

[0020] The pipeline support frame includes two vertical channel steels and a cross beam connecting the tops of the two channel steels. Multiple groups of through holes are provided on the cross beam, and the pipeline to be supported is fixed on the cross beam by a U-shaped clamp and a nut, and the U-shaped clamp passes through the corresponding through hole.

[0021] As an improved solution, lifting rings or lifting holes are provided at the four corners of the bottom plate of the skid-mounted support structure; the lifting ring is an annular member welded on the surface or side of the bottom plate, and the lifting hole is a through hole opened on the bottom plate.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] 1. The present utility model uses an integrated air compressor and multiple oxygen enrichment membrane components in a parallel gas production mode, which not only improves the separation efficiency and output of oxygen, but also ensures the continuity and stability of the gas production process. At the same time, combined with the parallel stacking design of the skid-mounted device, the space utilization rate is greatly optimized, making the installation process of the entire oxygen generator more flexible and convenient.

[0024] 2. The present utility model adopts a modular and integrated design concept, which not only shortens the equipment installation cycle, reduces the installation cost, but also facilitates maintenance and upgrade, providing a more efficient, reliable and economical oxygen preparation solution for users.

[0025] 3. Compared with the negative pressure membrane oxygen generation equipment, the present utility model omits the vacuum pumping equipment, which can further reduce the number of dynamic equipment in the skid-mounted equipment and lower the equipment production and maintenance costs. At the same time, due to the use of an oxygen generation principle different from that of the negative pressure membrane, the oxygen concentration can reach more than 40% (only about 30% for the negative pressure membrane equipment).

[0026] 4. While having a large gas production capacity, the present utility model can quickly adjust the oxygen concentration and flow rate, and can directly utilize the nitrogen-rich gas at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the integrated oxygen enricher;

[0028] Figure 2 is a front view structural schematic diagram of the integrated oxygen enricher.

[0029] The reference numerals are: 1, integrated air compressor; 2, main compressed air pipe; 3, component support frame; 4, membrane oxygen enrichment component; 5, pipeline support frame; 6, oxygen-enriched gas transmission branch pipe; 7, nitrogen-rich gas transmission branch pipe; 8, nitrogen-rich gas pressure gauge; 9, nitrogen-rich gas flowmeter; 10, electric globe valve; 11, oxygen-enriched gas flowmeter; 12, oxygen-enriched gas pressure gauge; 13, electric switch ball valve; 14, (reserved) electric switch ball valve; 15, oxygen-enriched gas transmission main pipe; 16, nitrogen-rich gas transmission main pipe; 17, compressed air branch pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will make a detailed description of the specific embodiments of the present utility model in conjunction with the drawings.

[0031] First part: Structure description of the integrated oxygen enrichment skid-mounted equipment

[0032] The integrated oxygen enrichment skid-mounted equipment based on the positive pressure membrane process described in the present utility model includes an integrated air compressor 1, a membrane oxygen enrichment component 4 and a skid-mounted support structure; wherein,

[0033] The integrated air compressor 1 includes a compressed air production device and a compressed air storage tank, which are connected through a compressed air output pipeline; the compressed air storage tank is connected to the membrane oxygen enrichment module 4 through a main compressed air pipeline 2; among them, the compressed air production device includes a box body, inside which there are a screw compressor, a refrigerated dryer, a filter and an oil removal tank, and they are connected in sequence through internal pipelines; corresponding temperature and pressure detection elements or motor operation parameter detection elements are provided on each operating device, and each detection element is connected to a host computer through a signal line. A reserved through hole, a control dial and a door opening structure are provided on the box body; among them, the reserved through hole is used to pass through the air inlet pipeline and the compressed air output pipeline, the air inlet pipeline is connected to the inlet of the screw compressor, and the compressed air output pipeline is connected to the oil removal tank and the compressed air storage tank; the control dial includes a liquid crystal display and device start / stop buttons, and the door opening structure is used to provide a maintenance passage.

[0034] There are multiple membrane oxygen enrichment modules 4 arranged in parallel. Each membrane oxygen enrichment module 4 has a compressed air inlet, an oxygen-enriched gas outlet and a nitrogen-enriched gas outlet, which are respectively connected to a compressed air branch pipe 17, an oxygen-enriched gas transmission branch pipe 6 and a nitrogen-enriched gas transmission branch pipe 7. Specifically, a screw connection method can be selected to achieve a detachable connection; the compressed air branch pipes 17 of each membrane oxygen enrichment module 4 are all connected to the main compressed air pipeline 2, the oxygen-enriched gas transmission branch pipes 6 of each membrane oxygen enrichment module 4 are all connected to the main oxygen-enriched gas transmission pipeline 15, and the nitrogen-enriched gas transmission branch pipes 7 of each membrane oxygen enrichment module 4 are all connected to the main nitrogen-enriched gas transmission pipeline 16. An oxygen-enriched gas flowmeter 11, an oxygen-enriched gas pressure gauge 12 and an electric on-off ball valve 13 are successively installed on the main oxygen-enriched gas transmission pipeline 15; a nitrogen-enriched gas pressure gauge 8, a nitrogen-enriched gas flowmeter 9 and an electric stop valve 10 are successively installed on the main nitrogen-enriched gas transmission pipeline 16; the electric on-off ball valve 13 is used to quickly open or close the flow of oxygen-enriched gas, and the electric stop valve 10 is used to adjust the oxygen-enriched concentration and oxygen-enriched gas flow produced by the membrane oxygen enrichment module 4. The oxygen-enriched gas flowmeter 11, the oxygen-enriched gas pressure gauge 12, the nitrogen-enriched gas pressure gauge 8, the nitrogen-enriched gas flowmeter 9, the electric on-off ball valve 13 and the electric stop valve 10 are respectively connected to the host computer through signal lines; the measuring devices transmit measurement data to the host computer, and the latter issues control signals to the electric on-off ball valve or the electric stop valve according to the control strategy; to achieve the opening or closing of the oxygen-enriched gas flow channel, and to adjust the concentration and flow of the oxygen-enriched gas produced by the membrane oxygen enrichment module. As an optional solution, a reserved electric on-off ball valve 14 is also installed on the main oxygen-enriched gas transmission pipeline 15, and it is arranged in parallel with the electric on-off ball valve 13.

[0035] Skid-mounted support structure, including a bottom plate and a component support frame 3; a compressed air production device, a compressed air storage tank, and the component support frame 3 are arranged on the bottom plate in sequence; the component support frame 3 is vertically fixed on the bottom plate, and each membrane oxygen enrichment component 4 is fixed on the component support frame. As an example, the component support frame 3 includes two vertical channel steels, and at least three cross beams are arranged at intervals between the two; multiple groups of through holes are provided on each cross beam, and each membrane oxygen enrichment component 4 is vertically fixed on each cross beam by a U-shaped clamp and a nut, and each U-shaped clamp passes through the corresponding through hole. As another example solution, a pipeline support frame 5 is further included on the bottom plate; the pipeline support frame 5 is a vertical channel steel, and through holes are provided at its upper end, and the supported pipeline is fixed on the pipeline support frame by a U-shaped clamp and a nut, and the U-shaped clamp passes through the corresponding through hole; alternatively, the pipeline support frame 5 includes two vertical channel steels and a cross beam connecting the tops of the two channel steels, multiple groups of through holes are provided on the cross beam, and the supported pipeline is fixed on the cross beam by a U-shaped clamp and a nut, and the U-shaped clamp passes through the corresponding through hole. For convenient hoisting for transportation and installation, lifting rings or lifting holes are provided at the four corners of the bottom plate; among them, the lifting ring can be an annular member welded on the surface or side of the bottom plate, and the lifting hole can be a through hole opened on the bottom plate.

[0036] The device structure in the second part of the specific embodiments

[0037] The specific structure of the oxygen enricher in this example is as Figure 1 As 2 shown, including an integrated air compressor 1 and multiple membrane oxygen enrichment components 4 arranged side by side on one side of the component support frame 3 through a fixed frame and fasteners; exemplarily, the integrated air compressor 1 in this embodiment is assembled from components such as a screw compressor, a refrigerated dryer, a precision filter, an oil removal tank, a compressed air storage tank, and a gas transmission pipe, and is used to output finished compressed air.

[0038] In this embodiment, three membrane oxygen enrichment components 4 are provided, and the quantity and specifications of the membrane oxygen enrichment components 4 can be selected according to actual working conditions before installation; the compressed air inlet, oxygen-rich gas outlet, and nitrogen-rich gas outlet of each membrane oxygen enrichment component 4 are respectively detachably connected to the ends of the compressed air branch pipe 17, the oxygen-rich gas transmission branch pipe 6, and the nitrogen-rich gas transmission branch pipe 7 through screw hole structures, and the other ends of the compressed air branch pipe 17, the oxygen-rich gas transmission branch pipe 6, and the nitrogen-rich gas transmission branch pipe 7 are respectively connected to the compressed air main pipe 2, the oxygen-rich gas transmission main pipe 15, and the nitrogen-rich gas transmission main pipe 16. The compressed air storage tank in the integrated air compressor 1 is connected and communicated with the inlet end of the compressed air main pipe 2, and the oxygen-rich gas transmission main pipe 6 and the nitrogen-rich gas transmission main pipe 7 are respectively used to transport oxygen-rich and nitrogen-rich gases. The outside of the oxygen-rich gas transmission main pipe 15 is fixed at the upper end of the pipeline support frame 5, and the lower end of the pipeline support frame 5 is fixedly installed on the upper surface of the bottom plate of the skid-mounted support structure.

[0039] An oxygen-enriched gas transmission main pipe 15 is equipped with an oxygen-enriched flowmeter 11, an oxygen-enriched pressure gauge 12, an electric switch ball valve 13, and a reserved electric switch ball valve 14. The electric switch ball valve 13 is used to quickly open or close the flow of oxygen-enriched gas in the oxygen-enriched gas transmission main pipe 15 to achieve effective control of oxygen-enriched gas transmission. The electric switch ball valve 14 is a ball valve that has not been enabled. In the future, when pipeline renovation, equipment maintenance is carried out, or when the main pipeline switch ball valve 13 fails, the electric shut-off ball valve 14 can be enabled to ensure the basic operation of the system and reduce production interruption or losses. A nitrogen-enriched gas transmission main pipe 16 is successively equipped with a nitrogen-enriched pressure gauge 8, a nitrogen-enriched flowmeter 9, and an electric globe valve 10. The electric globe valve 10 can be used to adjust the outlet concentration and flow rate of oxygen-enriched gas.

[0040] The bottom plate of the skid-mounted support structure is a rectangular steel plate, which plays a role in supporting and stabilizing. Two vertically parallel channel steels with opposite openings are welded on its upper surface, and three horizontally parallel steel plates are welded between the two channel steels to form a component support frame 3. The middle horizontal steel plate is thicker than the upper and lower steel plates. The upper and lower steel plates are respectively fixedly connected to both ends of the membrane oxygen-enriching component 4 through fasteners (such as a combination of U-shaped clamps and nuts). Before installation, the installation position of the lowermost steel plate can be reasonably set according to the specifications of the membrane oxygen-enriching component 4.

[0041] In the present utility model, the membrane oxygen-enriching component 4 preferably uses a D110-856 model product operating under positive pressure, and the screw compressor in the integrated air compressor 1 preferably uses an SVC-08AF screw energy-saving air compressor. Based on the oxygen-enriching machine with this example configuration scheme, the oxygen-enriched gas production capacity can reach 20 m 3 / h. Of course, the assembly quantity and option specifications of the membrane oxygen-enriching component 4 can also be adjusted according to actual needs.

[0042] The usage method of the device in the third part of specific embodiments

[0043] The oxygen-enriching machine is integrally placed and fixed on a flat ground. Connect the compressed air main pipe 2 to the air outlet of the compressed air tank in the integrated air compressor 1. Multiple membrane oxygen-enriching components 4 are connected and arranged on one side of the component support frame 3 through a fixed frame and fasteners. Then, connect the compressed air main pipe 2, the oxygen-enriched gas transmission main pipe 15, and the nitrogen-enriched gas transmission main pipe 16 to the compressed air inlet, oxygen-enriched gas outlet, and nitrogen-enriched gas outlet of the membrane oxygen-enriching component 4 through the compressed air branch pipe 17, the oxygen-enriched gas transmission branch pipe 6, and the nitrogen-enriched gas transmission branch pipe 7 respectively. The installation is completed through the above steps.

[0044] In use, the integrated air compressor 1 is used to produce finished compressed air with a pressure of 5 - 20 bar, which is input into each membrane oxygen enrichment component 4 through the compressed air main pipe 2 and the compressed air branch pipe 17. The nitrogen-rich gas transmission main pipe 16 can output nitrogen-rich gas with a pressure of 3 - 19 bar and a concentration of 90% - 95% for users. The oxygen-rich gas transmission main pipe 15 can output oxygen-rich gas with a pressure of 5 - 20 kPa and a concentration of 39% - 41% to meet the oxygen enrichment needs of users.

[0045] The flow rate and pressure of the oxygen-rich and nitrogen-rich gases in the pipes can be monitored in real time through the oxygen-rich flowmeter 11 and oxygen-rich pressure gauge 12 on the oxygen-rich gas transmission main pipe 15, and the nitrogen-rich pressure gauge 8 and nitrogen-rich flowmeter 9 on the nitrogen-rich gas transmission main pipe 16. The data can be input into the upper computer (or cloud server) in a wired or wireless manner. After processing, the various electrical equipment (compressor, valve, etc.) can be adjusted according to the preset control strategy. Users can also log in to the cloud through the web page on the PC side in different locations to obtain the gas flow rate, pressure data, and equipment operation data.

[0046] Based on the positive pressure membrane process, the membrane oxygen enrichment component 4 makes use of the different permeation rates of each component in the air when passing through the membrane. Driven by the pressure difference, oxygen in the air preferentially passes through the membrane to obtain oxygen-enriched air. Therefore, adjusting the flow rate of the nitrogen-rich outlet electric stop valve 10 can actually adjust the pressure balance in the system. When the flow rate after adjusting the nitrogen-rich outlet electric stop valve 10 increases, the amount of nitrogen discharged from the membrane oxygen enrichment component 4 increases; this will reduce the nitrogen partial pressure in the membrane oxygen enrichment component 4, thereby increasing the relative permeation rate of oxygen in the membrane and improving the oxygen concentration and flow rate on the oxygen-rich side. Conversely, reducing the flow rate of the nitrogen-rich outlet electric stop valve 10 will increase the nitrogen partial pressure in the membrane oxygen enrichment component 4 and reduce the oxygen concentration and flow rate on the oxygen-rich side. The electric stop valve 10 is generally needed during the start-up and commissioning stage and does not need to be adjusted after the oxygen enrichment machine operates stably as a whole.

Claims

1. An integrated oxygen-enriched skid-mounted device based on positive pressure membrane technology, characterized in that: It includes an integrated air compressor, membrane oxygen enrichment components and a skid-mounted support structure; The integrated air compressor includes a compressed air preparation device and a compressed air storage tank, which are connected through a compressed air output pipeline; the compressed air storage tank is connected to the membrane oxygen enrichment component through a compressed air main pipe; There are multiple membrane oxygen-enriched components which are arranged in parallel; each membrane oxygen-enriched component has a compressed air inlet, an oxygen-enriched gas outlet and a nitrogen-enriched gas outlet, which are respectively connected to a compressed air branch pipe, an oxygen-enriched gas transmission branch pipe and a nitrogen-enriched gas transmission branch pipe; the compressed air branch pipes of each membrane oxygen-enriched component are connected to the compressed air main pipe, the oxygen-enriched gas transmission branch pipes of each membrane oxygen-enriched component are connected to the oxygen-enriched gas transmission main pipe, and the nitrogen-enriched gas transmission branch pipes of each membrane oxygen-enriched component are connected to the nitrogen-enriched gas transmission main pipe; The skid-mounted support structure includes a base plate and a component support frame; the compressed air preparation equipment, the compressed air storage tank and the component support frame are arranged on the base plate in sequence; the component support frame is vertically fixed on the base plate, and each membrane oxygen-enriched component is fixed on the component support frame.

2. The integrated oxygen-enriched skid-mounted equipment according to claim 1, characterized in that: The compressed air production equipment includes a box body, inside which a screw compressor, a refrigerated dryer, a filter and an oil removal tank are arranged, and they are connected in sequence through internal pipelines; each operating device is correspondingly provided with a temperature and pressure detection element or a motor operating parameter detection element, and each detection element is connected to a host computer through a signal line.

3. The integrated oxygen-enriched skid-mounted equipment according to claim 2, characterized in that: A reserved through hole, a control dial and a door opening structure are provided on the box body; wherein, the reserved through hole is used to pass the air inlet pipeline and the compressed air output pipeline, the air inlet pipeline is connected to the inlet of the screw compressor, and the compressed air output pipeline is connected to the oil removal tank and the compressed air storage tank; the control dial includes a liquid crystal display and an equipment start and stop button, and the door opening structure is used to provide a maintenance passage.

4. The integrated oxygen-enriched skid-mounted equipment according to claim 1, characterized in that: The ends of the compressed air branch pipe, the oxygen-enriched gas branch pipe, and the nitrogen-enriched gas branch pipe are respectively installed on the compressed air inlet, the oxygen-enriched gas outlet, and the nitrogen-enriched gas outlet of the membrane oxygen-enriched component by screw connection, thereby realizing detachable connection.

5. The integrated oxygen-enriched skid-mounted equipment according to claim 1, characterized in that: An oxygen-rich flowmeter, an oxygen-rich pressure gauge and a first electric switch ball valve are installed in sequence on the oxygen-rich gas transmission main pipe; a nitrogen-rich pressure gauge, a nitrogen-rich flowmeter and an electric stop valve are installed in sequence on the nitrogen-rich gas transmission main pipe; the first electric switch ball valve is used to quickly open or close the flow of oxygen-rich gas, and the electric stop valve is used to adjust the oxygen-rich concentration and oxygen-rich flow produced by the membrane oxygen-rich component.

6. The integrated oxygen-enriched skid-mounted equipment according to claim 5, characterized in that: The oxygen-rich flowmeter, oxygen-rich pressure gauge, nitrogen-rich pressure gauge, nitrogen-rich flowmeter, first electric switch ball valve and electric stop valve are respectively connected to the host computer through signal lines; the measuring equipment transmits measurement data to the host computer, and the latter sends a control signal to the first electric switch ball valve or the electric stop valve according to the control strategy.

7. The integrated oxygen-enriched skid-mounted equipment according to claim 5, characterized in that: A reserved second electric switch ball valve is also installed on the oxygen-enriched gas transmission main pipe, and the second electric switch ball valve is arranged in parallel with the first electric switch ball valve.

8. The integrated oxygen-enriched skid-mounted equipment according to claim 1, characterized in that: The component support frame includes two vertical channel steels, between which at least three alternately arranged cross beams are arranged; each cross beam is provided with multiple groups of through holes, and each membrane oxygen-enriched component is vertically fixed on each cross beam by a U-shaped clamp and a nut, and each U-shaped clamp passes through the corresponding through hole.

9. The integrated oxygen-enriched skid-mounted equipment according to claim 1, characterized in that: The bottom plate of the skid-mounted support structure also includes a pipeline support frame; The pipeline support frame is a vertical channel steel with a through hole at its upper end. The supported pipeline is fixed to the pipeline support frame by a U-shaped clamp and a nut, and the U-shaped clamp passes through the corresponding through hole; or, The pipeline support frame includes two vertical channel steels and a crossbeam connecting the tops of the two channel steels. A plurality of through holes are arranged on the crossbeam. The supported pipeline is fixed on the crossbeam by U-shaped clamps and nuts, and the U-shaped clamps pass through the corresponding through holes.

10. The integrated oxygen-enriched skid-mounted equipment according to claim 1, characterized in that: The four corners of the bottom plate of the skid-mounted support structure are provided with lifting rings or lifting holes; the lifting rings are annular components welded to the surface or side of the bottom plate, and the lifting holes are through holes opened on the bottom plate.

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