Movable high-pressure membrane separation nitrogen-making device

Abstract

The invention discloses a movable high-pressure membrane separation nitrogen-making device which comprises an air compressor component section, an air pretreatment component section and a nitrogen-making host component section, the air compressor component section, the air pretreatment component section and the nitrogen making main machine component section are all mounted on flat cars, and three-ring chains and connecting bolts are arranged at the tail parts of the flat cars and are used for connecting the flat cars; the nitrogen-making device has the following advantages: the nitrogen-making efficiency is high; the product process is advanced and low in cost; operation is stable, and the service life is long; the permanent magnet variable-frequency air compressor can automatically adjust the rotating speed of the motor according to the change of the demand of compressed air and provide real-time matched compressed air output when used in cooperation with the permanent magnet variable-frequency air compressor; due to the characteristic, the equipment can still operate efficiently under the working condition of large load change, and the energy consumption is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of nitrogen production equipment, specifically a mobile high-pressure membrane separation nitrogen production device. Background Art

[0002] Membrane separation nitrogen production refers to using air as raw material, under certain pressure conditions, separating oxygen and nitrogen by utilizing the different permeation rates of gases with different properties such as oxygen and nitrogen in the membrane. This method has the advantages of simpler structure, smaller volume, no switching valves, less maintenance, etc., and is especially suitable for small and medium-sized nitrogen users, and the nitrogen purity is relatively high.

[0003] After the nitrogen production pipe in the prior art is used for a long time, it will age. Then, during the continuous nitrogen production work, it needs to be replaced. However, the device lacks components that are convenient for replacing the nitrogen production pipe, which will inevitably cause an extension of the nitrogen production time during the subsequent replacement process, thereby reducing the nitrogen production efficiency.

[0004] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Summary of the Invention

[0005] The purpose of the present invention is to provide a mobile high-pressure membrane separation nitrogen production device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A mobile high-pressure membrane separation nitrogen production device, including a sequentially connected air compressor component section, an air pretreatment component section, and a nitrogen production host component section; The air compressor component section includes a coal mine screw type mobile air compressor, and the coal mine screw type mobile air compressor is a permanent magnet variable frequency air compressor; the permanent magnet variable frequency air compressor can automatically adjust the motor speed according to the change of the compressed air demand and provide real-time matching compressed air output; The air pretreatment component section includes a heat exchanger, an oil-water separator, a pretreatment filter, a main pipeline filter, a high-efficiency oil removal filter, an ultra-high-efficiency oil removal filter, a catalytic purification device, an air heater, and an air storage tank; The heat exchanger, the oil-water separator, the pretreatment filter, the main pipeline filter, the high-efficiency oil removal filter, the ultra-high-efficiency oil removal filter, the catalytic purification device, the air heater, and the air storage tank are sequentially connected in series through pipelines; The nitrogen production host component section includes an air inlet component, an air outlet component, and a hollow fiber membrane component connected between the air inlet component and the air outlet component, and also includes a membrane support for installing the hollow fiber membrane component.

[0007] Further, the air compressor component section, the air pretreatment component section, and the nitrogen production host component section are all installed on flatbed trucks. A three-ring chain and a connecting bolt are provided at the tail of the flatbed truck for connecting between flatbed trucks.

[0008] Further, the air outlet of the catalytic purification device is also directly connected to the air storage tank through a pipeline, and a first manual ball valve is installed on this pipeline; a first manual ball valve is also installed on the pipeline between the air heater and the air storage tank.

[0009] Still further, a drain pipe is connected to the bottoms of the pretreatment filter, the main pipeline filter, the high-efficiency oil removal filter, and the ultra-high-efficiency oil removal filter through a first pneumatic ball valve.

[0010] Still further, a first pressure reducing valve is also installed on the air storage tank.

[0011] Further, the intake assembly includes a first vertical main pipe. A first intake pipe is connected to the left side of the first vertical main pipe, and multiple first elbows are connected to the right side of the first vertical main pipe. At the same time, a first bypass pipe is also connected to the bottom right side of the first vertical main pipe.

[0012] Still further, the outlet assembly includes a second vertical main pipe. A first outlet pipe is connected to the bottom right side of the second vertical main pipe, and multiple second elbows are connected to the left side of the second vertical main pipe.

[0013] Still further, the first elbows and the second elbows are respectively connected to the left and right ends of the hollow fiber membrane module through hoses; and a ball valve is installed on the hose; a high-pressure check valve is also installed on the first outlet pipe; the first outlet pipe and the first bypass pipe are connected through a tee, and the other end of the tee is also connected to a second outlet pipe, and a mine explosion-proof and intrinsically safe type swirling flowmeter, a plunger valve, and a pneumatic ball valve are installed on the second outlet pipe.

[0014] Further, there are two groups of membrane brackets, and the two groups of membrane brackets are arranged at intervals. The membrane bracket includes two columns fixedly installed on the flatbed truck and a crossbar fixedly connected between the columns, and also includes U-shaped bolts for fixing the hollow fiber membrane module on the crossbar.

[0015] Further, it also includes a mine explosion-proof and intrinsically safe programmable control box, a mine explosion-proof and intrinsically safe lighting signal integrated protection device, a mine explosion-proof and intrinsically safe DC power supply, and a mine explosion-proof low-voltage cable junction box; Among them, the mine flameproof and intrinsically safe type lighting signal integrated protection device is electrically connected to the mine flameproof and intrinsically safe type programmable control box, and the mine flameproof and intrinsically safe type programmable control box also controls and connects a coal mine screw type mobile air compressor, a mine intrinsically safe type swirling vortex flowmeter, and a mine substation; The mine intrinsically safe type swirling vortex flowmeter is powered by a mine flameproof and intrinsically safe type DC power supply; The mine flameproof and intrinsically safe type programmable control box is also signal-connected to a mine flameproof type temperature transmitter and a mine flameproof type pressure transmitter through a mine flameproof type low-voltage cable junction box; The said mine flameproof type temperature transmitter is installed on the side of the first vertical main pipe of the intake assembly; The said mine flameproof type pressure transmitter is installed on the intake pipeline of the air storage tank; The mine flameproof and intrinsically safe type programmable control box is also signal-connected to a mine potted type solenoid valve through a mine flameproof type low-voltage cable junction box.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This nitrogen generation device has the following advantages: high nitrogen generation efficiency; advanced product process and low cost; stable operation and long service life.

[0017] Nitrogen can be directly transported over long distances without the need for pressurization.

[0018] This nitrogen generation device is a mobile device and can be easily transferred to the workplace.

[0019] In order to adapt to the working condition environment containing explosive gases such as gas underground, the supporting electrical equipment of this nitrogen generation device has explosion-proof performance.

[0020] Used in conjunction with a permanent magnet variable frequency air compressor, the permanent magnet variable frequency air compressor can automatically adjust the motor speed according to the change of compressed air demand and provide real-time matching compressed air output. This feature enables the equipment to still operate efficiently under working conditions with large load changes, greatly reducing energy consumption.

[0021] In this solution, a membrane support is used as the support structure of the membrane module. The membrane module is placed on the cross arm of the membrane support and then is assisted to be fixed by U-bolts, and the replacement and disassembly are very convenient. Brief Description of the Drawings

[0022] Figure 1 It is the front view of the mobile high-pressure membrane separation nitrogen generation device.

[0023] Figure 2 It is the top view of the mobile high-pressure membrane separation nitrogen generation device.

[0024] Figure 3It is the front view of the air compressor component section in the mobile high-pressure membrane separation nitrogen generation device.

[0025] Figure 4 It is the structural schematic diagram of the air pretreatment component section in the mobile high-pressure membrane separation nitrogen generation device.

[0026] Figure 5 It is the front view of the air pretreatment component section in the mobile high-pressure membrane separation nitrogen generation device.

[0027] Figure 6 It is the side view of the air pretreatment component section in the mobile high-pressure membrane separation nitrogen generation device.

[0028] Figure 7 It is the top view of the air pretreatment component section in the mobile high-pressure membrane separation nitrogen generation device.

[0029] Figure 8 It is the structural schematic diagram of the nitrogen generation main unit component section in the mobile high-pressure membrane separation nitrogen generation device.

[0030] Figure 9 It is the front view of the nitrogen generation main unit component section in the mobile high-pressure membrane separation nitrogen generation device.

[0031] Figure 10 It is the PLC network control diagram of the mobile high-pressure membrane separation nitrogen generation device. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-10 , a mobile high-pressure membrane separation nitrogen generation device, including an air compressor component section 100, an air pretreatment component section 200, and a nitrogen generation main unit component section 300 that are connected in sequence; The air compressor component section 100, the air pretreatment component section 200, and the nitrogen generation main unit component section 300 are all installed on a flatbed truck 400. A three-ring chain 401 and a connecting pin 402 are provided at the tail of the flatbed truck 400 for connecting between flatbed trucks 400; The air compressor component section 100 includes a screw-type mobile air compressor for coal mines. The screw-type mobile air compressor for coal mines is a permanent magnet variable frequency air compressor, with the specific model: MLG21 / 25-220G(A). The permanent magnet variable frequency air compressor can automatically adjust the motor speed according to the change of compressed air demand, providing real-time matching compressed air output. This feature enables the equipment to maintain efficient operation under working conditions with large load changes, greatly reducing energy consumption. The air pretreatment component section 200 includes a heat exchanger 202, an oil-water separator 203, a pretreatment filter 204, a main pipeline filter 205, a high-efficiency oil removal filter 206, an ultra-high-efficiency oil removal filter 207, a catalytic purification device 208, an air heater 209, and an air storage tank 210. The heat exchanger 202, the oil-water separator 203, the pretreatment filter 204, the main pipeline filter 205, the high-efficiency oil removal filter 206, the ultra-high-efficiency oil removal filter 207, the catalytic purification device 208, the air heater 209, and the air storage tank 210 are connected in series through pipelines in sequence. In this solution, the air outlet of the catalytic purification device 208 is also directly connected to the air storage tank 210 through a pipeline, and a first manual ball valve 211 is installed on this pipeline. At the same time, a first manual ball valve 211 is also installed on the pipeline between the air heater 209 and the air storage tank 210. The bottoms of the pretreatment filter 204, the main pipeline filter 205, the high-efficiency oil removal filter 206, and the ultra-high-efficiency oil removal filter 207 are connected with a drain pipe (not shown in the figure) through a first pneumatic ball valve 212. In this solution, a first pressure reducing valve 201 is also installed on the air storage tank 210. In this solution, the model of the ultra-high-efficiency oil removal filter 207 is AHF3-50, the model of the high-efficiency oil removal filter 206 is AHF5-50, the model of the main pipeline filter 205 is AHF7-50, the model of the pretreatment filter 204 is AHF9-50, the model of the oil-water separator 203 is AHFL-50, the model of the heat exchanger 202 is BB100B-56X, the model of the catalytic purification device 208 is AHF1-50, and the model of the air heater 209 is AHJR-50HTF. During the operation of this solution, ambient air is inhaled from the air compressor component section 100, first enters the heat exchanger 202 for cooling, and then successively passes through the oil-water separator 203, the pretreatment filter 204, the main pipeline filter 205, the high-efficiency oil removal filter 206, the ultra-high-efficiency oil removal filter 207, and the catalytic purification device 208 to remove impurities in the air. Then, it is selectively heated by the air heater 209 and enters the air storage tank 210, or directly enters the air storage tank 210, or in a split-flow manner, part of the air is heated by the air heater 209 and then enters the air storage tank 210, while part of the air directly enters the air storage tank 210; The nitrogen production main engine component section 300 includes an air intake assembly 310, an air outlet assembly 320, and a hollow fiber membrane assembly 330 located between the air intake assembly 310 and the air outlet assembly 320, and also includes a membrane support 340 for installing the hollow fiber membrane assembly 330; The air intake assembly 310 includes a first vertical main pipe 311. A first intake pipe 312 is connected and set on the left side of the first vertical main pipe 311. Multiple first elbows 313 are connected and set on the right side of the first vertical main pipe 311. At the same time, a first bypass pipe 314 is also connected and set at the bottom right side of the first vertical main pipe 311; The air outlet assembly 320 includes a second vertical main pipe 321. A first outlet pipe 322 is connected and set at the bottom right side of the second vertical main pipe 321. Multiple second elbows 323 are connected and set on the left side of the second vertical main pipe 321; The first elbows 313 and the second elbows 323 are respectively connected and set with the left and right ends of the hollow fiber membrane assembly 330 through hoses; and a ball valve is installed on the hose. A high-pressure check valve 324 is also installed on the first outlet pipe 322.

[0034] The first outlet pipe 322 and the first bypass pipe 314 are connected and set through a tee. The other end of the tee is also connected and set with a second outlet pipe 325. A mine intrinsically safe type swirling flowmeter 326, a plunger valve 327, and a pneumatic ball valve 328 are also installed on the second outlet pipe 325; There are two groups of the membrane supports 340 in total, and the two groups of membrane supports 340 are arranged at intervals. The membrane support 340 includes two columns 341 fixedly installed on the flatbed truck 400 and a crossbar 342 fixedly connected between the columns 341, and also includes U-shaped bolts 343 for fixing the hollow fiber membrane assembly 330 on the crossbar 342; In this solution, a membrane support is used as the support structure of the membrane module. The membrane module is placed on the crossbar of the membrane support, and then is assisted and fixed by the U-shaped bolts 343, which is very convenient for replacement and disassembly.

[0035] The hollow fiber membrane module is connected to the air inlet module and the air outlet module through a hose. Adopting this flexible connection method makes it more convenient to replace the hollow fiber membrane module. In this solution, it also includes a mining flameproof and intrinsically safe programmable control box 501, a mining flameproof and intrinsically safe lighting signal integrated protection device 502, a mining flameproof and intrinsically safe DC power supply 503, and a mining flameproof low-voltage cable junction box 504. Model of the mining flameproof and intrinsically safe programmable control box: KXJ2-127. Model of the mining flameproof and intrinsically safe lighting signal integrated protection device: ZJZ-4.0 / 1140(660)M. Model of the mining flameproof and intrinsically safe DC power supply: DY660 / 24B(A). Model of the mining substation 505: KJ76X-F5(A). Among them, the mining flameproof and intrinsically safe lighting signal integrated protection device 502 is electrically connected to the mining flameproof and intrinsically safe programmable control box 501, and the mining flameproof and intrinsically safe programmable control box 501 also controls and connects a coal mine screw-type mobile air compressor, a mining intrinsically safe swirling vortex flowmeter 326, and a mining substation 505. The mining intrinsically safe swirling vortex flowmeter 326 is powered by the mining flameproof and intrinsically safe DC power supply 503. The mining flameproof and intrinsically safe programmable control box 501 is also signal-connected to a mining encapsulated type solenoid valve 508 through the mining flameproof low-voltage cable junction box 504. The mining flameproof type temperature transmitter 506 is installed on the side of the first vertical main pipe 311 of the air inlet module 310. The mining flameproof type pressure transmitter 507 is installed on the air inlet pipeline of the air storage tank 210. The mining flameproof and intrinsically safe programmable control box 501 is also signal-connected to a mining potted type solenoid valve 508 through the mining flameproof low-voltage cable junction box 504. The working principle of nitrogen production by membrane separation in this solution: After the ambient air is pressurized by an air compressor and filtered, dried, and cooled, the clean and suitable air enters the membrane separation device. Since the permeation coefficients of various gases in the air are different, the permeation rates of different gases through the membrane are different. The gases dissolve in the membrane on the high-pressure side surface of the membrane with different solubilities, and then under the driving of the pressure difference on both sides of the membrane, the gas molecules diffuse to the low-pressure side of the membrane at different speeds. The hollow and permeable fiber membrane quickly allows the gas with a fast permeation rate to pass through the membrane and enter the permeate side of the membrane to be enriched. At the same time, the gas with a relatively slow permeation rate is enriched on the retentate side of the membrane, thus realizing the enrichment and separation of different gases on both sides of the membrane.

[0036] According to the above principle, the oxygen permeability coefficient is greater than that of nitrogen. After membrane separation, the gas enriched in nitrogen is left, while the gas passing through the membrane is enriched in oxygen. The outlet pressure of the enriched nitrogen is almost the same as the pressure when the compressed air enters the membrane module, and the power loss is very small, thus realizing the separation of oxygen and nitrogen in the air. The separated nitrogen is transported to the gas storage tank through pipelines for storage or directly connected to the user end through connectors for use.

[0037] Low-temperature nitrogen is used to continuously cool and inert the goaf to inhibit the signs of spontaneous combustion.

[0038] In this solution: 1. The coal mine safety sign: MA shall be marked on the conspicuous part of the nitrogen generation device.

[0039] 2. After the quick-connect pressure hose is connected, the whole system shall be leak-tested. After inflation, keep the pressure for 20 minutes to test for leakage. The test pressure is the design pressure (2.4 Mpa) plus the safety factor.

[0040] 3. Different models of nitrogen generation devices (with different nitrogen production capacities) included in this membrane separation nitrogen generation device are assembled using the same process.

[0041] 4. During the operation of the electrical control box of this nitrogen generation device, it is strictly prohibited to repair electrical equipment. For operations that must be carried out under live conditions, the live operation procedures shall be strictly followed, and safety warning signs or blocking devices shall be set up to prevent other personnel from operating by mistake.

[0042] 5. This nitrogen generation device is installed in sections. The components of each section must be installed and connected according to the view positions, and the relative positions of the components of each section cannot be randomly changed.

[0043] 6. The selected air compressor is a coal mine-used screw mobile air compressor, and the installation, commissioning and maintenance shall be carried out strictly in accordance with the operation and use procedures.

[0044] 7. The pressure vessels configured for the equipment must be produced by a manufacturer with the qualification for producing pressure vessels, and the products shall have safety inspection certificates.

[0045] 8. Execution standards: QB / YZZN DM01-2024, MT / T774-2011, GB / T3638-2021.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, terms such as "set", "connected" should be understood in a broad sense. For example, "connected" 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 an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. Mobile high-pressure membrane separation nitrogen generation device, characterized in that It includes a sequentially connected air compressor component section, an air pretreatment component section, and a nitrogen generation main unit component section; The air compressor component section includes a coal mine screw mobile air compressor, and the coal mine screw mobile air compressor is a permanent magnet variable frequency air compressor; the permanent magnet variable frequency air compressor can automatically adjust the motor speed according to the change of compressed air demand and provide real-time matching compressed air output; The air pretreatment component section includes a heat exchanger, an oil-water separator, a pretreatment filter, a main pipeline filter, a high-efficiency oil removal filter, an ultra-high-efficiency oil removal filter, a catalytic purification device, an air heater, and an air storage tank; The heat exchanger, the oil-water separator, the pretreatment filter, the main pipeline filter, the high-efficiency oil removal filter, the ultra-high-efficiency oil removal filter, the catalytic purification device, the air heater, and the air storage tank are sequentially connected in series through pipelines; The nitrogen generation main unit component section includes an air inlet component, an air outlet component, and a hollow fiber membrane component connected between the air inlet component and the air outlet component, and also includes a membrane bracket for installing the hollow fiber membrane component.

2. The mobile high-pressure membrane separation nitrogen generation device according to claim 1, wherein The air compressor component section, the air pretreatment component section, and the nitrogen generation main unit component section are all installed on a flatbed truck, and a three-ring chain and a connecting pin are provided at the tail of the flatbed truck for connecting between flatbed trucks.

3. The mobile high-pressure membrane separation nitrogen generation device according to claim 1, wherein, The air outlet of the catalytic purification device is also directly connected to the air storage tank through a pipeline, and a first manual ball valve is installed on this pipeline; at the same time, a first manual ball valve is also installed on the pipeline between the air heater and the air storage tank.

4. The mobile high-pressure membrane separation nitrogen production device according to claim 3, wherein The bottoms of the pretreatment filter, the main pipeline filter, the high-efficiency oil removal filter, and the ultra-high-efficiency oil removal filter are connected with a blowdown pipe through a first pneumatic ball valve.

5. The mobile high-pressure membrane separation nitrogen generation device according to claim 4, characterized in that, A first pressure reducing valve is also installed on the air storage tank.

6. The mobile high-pressure membrane separation nitrogen production device according to claim 1, wherein, The air inlet component includes a first vertical main pipe, a first air inlet pipe is connected to the left side of the first vertical main pipe, multiple first elbows are connected to the right side of the first vertical main pipe, and a first bypass pipe is also connected to the bottom right side of the first vertical main pipe.

7. The mobile high-pressure membrane separation nitrogen production device according to claim 6, wherein The air outlet component includes a second vertical main pipe, a first air outlet pipe is connected to the bottom right side of the second vertical main pipe, and multiple second elbows are connected to the left side of the second vertical main pipe; the first elbows and the second elbows are respectively connected to the left and right ends of the hollow fiber membrane component through hoses; and a ball valve is installed on this hose; a high-pressure check valve is also installed on the first air outlet pipe.

8. The mobile high-pressure membrane separation nitrogen generation device according to claim 7, wherein, The first air outlet pipe and the first bypass pipe are connected through a tee, and the other end of this tee is also connected with a second air outlet pipe, and a mine explosion-proof and intrinsically safe type swirling flowmeter, a plunger valve, and a pneumatic ball valve are installed on this second air outlet pipe.

9. The mobile high-pressure membrane separation nitrogen generation device according to claim 1, characterized in that, There are two groups of membrane brackets in total, and the two groups of membrane brackets are arranged at intervals. The membrane bracket includes two columns fixedly installed on the flatbed truck and a crossbar fixedly connected between the columns, and also includes U-shaped bolts for fixing the hollow fiber membrane component on the crossbar.

10. The mobile high-pressure membrane separation nitrogen generation device according to claim 1, wherein, It also includes a mine explosion-proof and intrinsically safe programmable control box, a mine explosion-proof and intrinsically safe lighting signal integrated protection device, a mine explosion-proof and intrinsically safe DC power supply, and a mine explosion-proof low-voltage cable junction box; Among them, the mine flameproof and intrinsically safe type lighting signal integrated protection device is electrically connected to the mine flameproof and intrinsically safe type programmable control box, and the mine flameproof and intrinsically safe type programmable control box also controls and connects a coal mine screw type mobile air compressor, a mine intrinsically safe type swirling vortex flowmeter, and a mine substation; The mine intrinsically safe type swirling vortex flowmeter is powered by a mine flameproof and intrinsically safe type DC power supply; The mine flameproof and intrinsically safe type programmable control box is also signal-connected to a mine flameproof type temperature transmitter and a mine flameproof type pressure transmitter through a mine flameproof type low-voltage cable junction box; The mine flameproof type temperature transmitter is installed on the side of the first vertical main pipe of the air intake assembly; The mine flameproof type pressure transmitter is installed on the air intake pipeline of the air storage tank; The mine flameproof and intrinsically safe type programmable control box is also signal-connected to a mine potted type solenoid valve through a mine flameproof type low-voltage cable junction box.

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