A membrane separation nitrogen generator and nitrogen production method

Abstract

The present invention relates to the technical field of nitrogen making equipment, and in particular to a membrane separation nitrogen making machine and a nitrogen making method, comprising a housing, a separation membrane tube, an air compressor, an air intake pipe and a pretreatment component, wherein the separation membrane tube is arranged inside the housing, the air compressor is arranged inside the housing, the air intake pipe is communicated with the air compressor, the pretreatment component comprises a filter cartridge and a plurality of filter membranes, the filter cartridge is arranged inside the air intake pipe, the plurality of filter membranes are sequentially arranged between the air intake pipe and the air compressor, external air enters the housing through the air intake pipe, passes through the filter cartridge and the filter membrane for dust filtration, then enters the air compressor for compression, and finally reaches the separation membrane tube for nitrogen separation, in addition, a water tank can be used to filter dust before the air enters the air intake pipe, and then enters the air intake pipe, which can further improve the dust filtration effect, thereby pretreating the air, removing dust in the air, and avoiding clogging of the separation membrane tube resulting in poor separation efficiency and separation quality.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen production equipment, and in particular to a membrane separation nitrogen production machine and a nitrogen production method. Background Art

[0002] At present, in the production of nitrogen, nitrogen is extracted from the air, and the difference in solubility and diffusion coefficient of nitrogen and oxygen in the air in the membrane is used to separate nitrogen and oxygen through the selective permeation of the membrane, so that the nitrogen can be used. At present, the nitrogen in the air is enriched and exported at the tail end through a molecular membrane tube, and one end of the air inlet branch pipe is connected to the gas distribution box through a threaded seal. The gas distribution box evenly distributes the treated and purified air in multiple groups of air inlet branch pipes to separate the nitrogen. The separated nitrogen is exported through multiple air outlet branch pipes at one end and collected by the gas collecting box. However, the nitrogen making pipe will age after long-term use. In this case, it needs to be replaced in long-term nitrogen making work. However, the device lacks components that are convenient for replacing the nitrogen making pipe, which will inevitably cause the nitrogen making time to be extended during the subsequent replacement process, thereby reducing the nitrogen making efficiency.

[0003] In the prior art, the separation tube is fixed by means of a flange and fastening bolts, and when necessary, the separation tube can be replaced by simply unscrewing the bolts.

[0004] However, in the above-mentioned prior art, the air is not pre-treated, and a small amount of dust is contained in the air. After entering the separation membrane tube, long-term use may easily lead to blockage of the separation membrane tube, affecting the separation efficiency and quality. In addition, the operation of fixing with bolts is cumbersome and it is not convenient to quickly replace the separation tube. Summary of the invention

[0005] The object of the present invention is to provide a membrane separation nitrogen generator and a nitrogen making method, so as to solve the problems that the air is not pre-treated in the prior art, a small amount of dust is contained in the air, and after entering the separation membrane tube, the separation membrane tube is easily blocked after long-term use, which affects the separation efficiency and separation quality, and the operation of fixing with bolts is cumbersome and it is not convenient to quickly replace the separation tube.

[0006] To achieve the above object, the present invention provides a membrane separation nitrogen generator, comprising a housing, a separation membrane tube, an air compressor, an air intake pipe and a pretreatment component, wherein the separation membrane tube is arranged inside the housing, the air compressor is arranged inside the housing, and the air intake pipe is connected to the air compressor;

[0007] The pretreatment component includes a filter cartridge and a plurality of filter membranes. The filter cartridge is arranged inside the air intake pipe, and the plurality of filter membranes are sequentially arranged between the air intake pipe and the air compressor.

[0008] Among them, the filter cartridge includes a sealing inner ring, multiple filter plates and a first handle. The multiple filter plates are fixedly connected to the sealing inner ring and are distributed in sequence inside the sealing inner ring. The first handle is fixedly connected to the sealing inner ring and is located on one side of the sealing inner ring.

[0009] Wherein, the pretreatment component also includes a rotating unit, which is connected to the intake pipe; the rotating unit includes a filter box, a cover body, a motor, a rotating shaft, multiple frames and a particle sensor, the filter box is connected to the intake pipe, the filter box is arranged inside the box body, the cover body is bolted to the top of the filter box, the motor is arranged above the cover body, one end of the rotating shaft is fixedly connected to the output end of the motor, the other end of the rotating shaft passes through the cover body and is fixedly connected to multiple frames, multiple filter membranes are respectively arranged inside the corresponding frames, and the particle sensor is arranged below the cover body.

[0010] In which, the pretreatment component also includes an installation unit, which is arranged inside the box; the installation unit includes a rebound mechanism, a telescopic air outlet pipe, a frame, a plurality of limit columns, a connecting pipe, a first sealing ring and a door panel, the rebound mechanism is arranged on the inner top wall of the box, one end of the telescopic air outlet pipe passes through the box, the separation membrane tube is arranged on the frame, the rebound mechanism is arranged inside the box and is located above the frame, a plurality of limit columns are sequentially arranged below the frame, the box has a plurality of limit holes, and a plurality of limit columns are respectively adapted to the corresponding limit holes, one end of the connecting pipe is connected to the separation membrane tube, the first sealing ring is arranged at the other end of the connecting pipe, the air inlet end of the air compressor is connected to the filter box, the other end of the connecting pipe is connected to the air outlet end of the air compressor, and the door panel is rotatably connected to the box.

[0011] Wherein, the frame body includes an upper plate body, a lower plate body and a plurality of support rods, the two ends of the plurality of support rods are respectively fixedly connected to the upper plate body and the lower plate body, the plurality of limit columns are sequentially arranged below the lower plate body, and the separation membrane tube is arranged between the upper plate body and the lower plate body.

[0012] Wherein, the rebound mechanism comprises two telescopic rods, two springs, a lower pressure cover, a second sealing ring, a butt joint tube and a plurality of second handles, the two ends of the two telescopic rods are respectively fixedly connected to the inner top wall of the box body and the lower pressure cover, the two ends of the two springs are respectively movably connected to the inner top wall of the box body and the lower pressure cover, the springs are sleeved on the outside of the telescopic rods, the lower pressure cover and the upper plate body abut against each other, one end of the butt joint tube is communicated with the top of the separation membrane tube, the other end of the butt joint tube passes through the upper plate body and is located inside the lower pressure cover, one end of the telescopic air outlet pipe is communicated with the other end of the butt joint tube, the second sealing ring is arranged between the lower pressure cover and the upper plate body, and a plurality of second handles are respectively arranged on the upper plate body, the lower plate body and the lower pressure cover.

[0013] The present invention also provides a membrane separation nitrogen production method, which uses the membrane separation nitrogen production machine described above, comprising the following steps:

[0014] Holding the first handle, the filter cartridge is placed inside the air inlet pipe;

[0015] Using the rebound mechanism to press down and install the separation membrane tube;

[0016] The air is passed through the air inlet pipe into the filter box, and the dust is filtered by the filter plate;

[0017] The rotating unit drives the filter membrane to perform secondary filtration on the air inside the filter box;

[0018] Relying on a pump body arranged outside the filter box, air is drawn into the air compressor for compression, and then enters the separation membrane tube through a connecting pipe;

[0019] The nitrogen is separated by a separation membrane tube and then discharged from the telescopic outlet pipe.

[0020] The membrane separation nitrogen making machine and nitrogen making method of the present invention allow external air to enter the box body through the air inlet pipe, pass through the filter cartridge and the filter membrane for dust filtration, then enter the air compressor for compression, and finally reach the separation membrane tube for nitrogen separation. In addition, a water tank can be used to filter dust before the air enters the air inlet pipe, which can further improve the dust filtration effect. Moreover, when it is necessary to take out the separation membrane tube for replacement, the second handle is held to first move up the lower pressure cover, and then move up to take out the frame. After the lower pressure cover is tightly held above the upper plate body, the above-mentioned structural setting can not only pre-treat the air and remove dust in the air, so as to avoid clogging of the separation membrane tube and resulting in poor separation efficiency and separation quality, but also the separation membrane tube can be quickly disassembled and installed by relying on the action of the spring and the limit column, thereby improving the efficiency of replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is the overall internal structure diagram of the present invention.

[0024] Figure 3 It is a cross-sectional view of the whole of the present invention.

[0025] Figure 4 The present invention Figure 3 A magnified view of the local structure at A.

[0026] Figure 5 The present invention Figure 3 Enlarged view of the local structure at point B.

[0027] Figure 6 It is a flow chart of the steps of the membrane separation nitrogen production method of the present invention.

[0028] 1-box body, 2-separation membrane tube, 3-air compressor, 4-inlet pipe, 5-filter membrane, 6-sealed inner ring, 7-filter plate, 8-first handle, 9-filter box, 10-cover body, 11-motor, 12-rotating shaft, 13-frame body, 14-particle sensor, 15-telescopic air outlet pipe, 16-limiting column, 17-connecting pipe, 18-first sealing ring, 19-door panel, 20-limiting hole, 21-upper plate body, 22-lower plate body, 23-support rod, 24-telescopic rod, 25-spring, 26-lower pressure cover, 27-second sealing ring, 28-butt pipe, 29-second handle. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0030] See also Figures 1 to 5 The present invention provides a membrane separation nitrogen generator, comprising a box body 1, a separation membrane tube 2, an air compressor 3, an air inlet pipe 4 and a pretreatment component, wherein the pretreatment component comprises a filter cartridge and a plurality of filter membranes 5, the filter cartridge comprises a sealing inner ring 6, a plurality of filter plates 7 and a first handle 8, the pretreatment component further comprises a rotating unit, and the rotating unit is connected to the air inlet pipe 4; the rotating unit comprises a filter box 9, a cover body 10, a motor 11, a rotating shaft 12, a plurality of frames 13 and a particle sensor 14, the pretreatment component further comprises an installation unit, and the installation unit is arranged inside the box body 1; the installation unit comprises a rebound mechanism, a telescopic air outlet pipe 15, a frame body, a plurality of limit columns 16, a connecting pipe 17, a first sealing ring 18 and a door panel 19, the frame body comprises an upper plate body 21, a lower plate body 22 and a plurality of support rods 23, the rebound mechanism comprises two telescopic rods 24, two springs 25, a lower pressure cover 26, a second sealing ring 27, a butt pipe 28 and a plurality of second handles 29.

[0031] The separation membrane tube 2 is arranged inside the housing 1, the air compressor 3 is arranged inside the housing 1, the air intake pipe 4 is connected to the air compressor 3, the filter cartridge is arranged inside the air intake pipe 4, and a plurality of filter membranes 5 are arranged in sequence between the air intake pipe 4 and the air compressor 3. External air enters the housing 1 through the air intake pipe 4, passes through the filter cartridge and the filter membrane 5 for dust filtration, then enters the air compressor 3 for compression, and finally reaches the separation membrane tube 2 for nitrogen separation. In addition, a water tank can be used to filter dust before the air enters the air intake pipe 4, and then enters the air intake pipe 4, which can further improve the dust filtration effect.

[0032] Secondly, the plurality of filter plates 7 are fixedly connected to the sealing inner ring 6 and are sequentially distributed inside the sealing inner ring 6. The first handle 8 is fixedly connected to the sealing inner ring 6 and is located on one side of the sealing inner ring 6. The sealing inner ring 6 supports the filter plates 7 and prevents air from entering the box body 1 through the gap between the filter plates 7 and the air inlet pipe 4. The first handle 8 can facilitate pulling out the sealing inner ring 6 and filtering air dust by relying on the filter plates 7.

[0033] At the same time, the filter box 9 is communicated with the air intake pipe 4, the filter box 9 is arranged inside the box body 1, the cover body 10 is bolted to the top of the filter box 9, the motor 11 is arranged above the cover body 10, one end of the rotating shaft 12 is fixedly connected to the output end of the motor 11, the other end of the rotating shaft 12 passes through the cover body 10 and is fixedly connected to the plurality of frames 13, the plurality of filter membranes 5 are respectively arranged inside the corresponding frames 13, and the particle sensor 14 is arranged below the cover body 10. After the air enters the filter box 9, the motor 11 is started, driving the rotating shaft 12 to rotate, driving the plurality of frames 13 to rotate, driving the filter membrane 5 to rotate, and absorbing and filtering the dust in the filter box 9, until the particle sensor 14 cannot detect the dust, then the air compressor 3 can be started, and the pump body is used to draw air into the air compressor 3 for air compression.

[0034] In addition, the rebound mechanism is arranged on the inner top wall of the box body 1, one end of the telescopic air outlet pipe 15 passes through the box body 1, the separation membrane tube 2 is arranged on the frame, the rebound mechanism is arranged inside the box body 1 and is located above the frame, a plurality of limit columns 16 are arranged in sequence below the frame, the box body 1 has a plurality of limit holes 20, and a plurality of limit columns 16 are respectively adapted to the corresponding limit holes 20, one end of the connecting pipe 17 is connected to the separation membrane tube 2, the first sealing ring 18 is arranged at the other end of the connecting pipe 17, the air inlet end of the air compressor 3 is connected to the filter box 9, the other end of the connecting pipe 17 is connected to the air outlet end of the air compressor 3, and the door panel 19 is rotatably connected to the box body 1. The rebound mechanism presses down and fixes the frame, and the frame supports the separation membrane tube 2. The telescopic air outlet pipe 15 can move following the upward and downward movement of the rebound mechanism. When the frame is pressed down and fixed, the limiting column 16 enters the limiting hole 20 to complete the fixation. At the same time, the connecting pipe 17 enters the air outlet end of the air compressor 3, and then the first sealing ring 18 plays a role of resisting and sealing. When it is necessary to move up and take out the frame and the separation membrane tube 2, it is only necessary to open the door panel 19 to operate.

[0035] Then, the two ends of the plurality of support rods 23 are fixedly connected to the upper plate body 21 and the lower plate body 22 respectively, the plurality of limit posts 16 are sequentially arranged below the lower plate body 22, and the separation membrane tube 2 is arranged between the upper plate body 21 and the lower plate body 22. The upper plate body 21 and the lower plate body 22 support the separation membrane tube 2, and the support rods 23 support the upper plate body 21 and the lower plate body 22.

[0036] Finally, the two ends of the two telescopic rods 24 are fixedly connected to the inner top wall of the box body 1 and the lower pressure cover 26, respectively, and the two ends of the two springs 25 are movably connected to the inner top wall of the box body 1 and the lower pressure cover 26, respectively, the springs 25 are sleeved on the outside of the telescopic rods 24, the lower pressure cover 26 and the upper plate body 21 abut against each other, one end of the docking tube 28 is communicated with the top of the separation membrane tube 2, the other end of the docking tube 28 passes through the upper plate body 21 and is located inside the lower pressure cover 26, one end of the telescopic air outlet pipe 15 is communicated with the other end of the docking tube 28, the second sealing ring 27 is arranged between the lower pressure cover 26 and the upper plate body 21, and a plurality of second handles 29 are respectively arranged on the upper plate body 21, the lower plate body 22 and the lower pressure cover 26. The spring 25 drives the lower pressure cover 26 to move downward, and the lower pressure cover 26 pushes the upper plate body 21 to move downward, so that the limiting column 16 enters the limiting hole 20. At the same time, the docking tube 28 is located inside the lower pressure cover 26 and is connected to one end of the telescopic air outlet pipe 15. When it is necessary to take out the separation membrane tube 2 for replacement, hold the second handle 29, first move up the lower pressure cover 26, and then move up to take out the frame. After the lower pressure cover 26 is tightly held above the upper plate body 21, the second sealing ring 27 plays a sealing role. Therefore, relying on the action of the spring 25 and the limiting column 16, the separation membrane tube 2 can be quickly disassembled and installed, thereby improving the efficiency of replacement and maintenance.

[0037] When using a membrane separation nitrogen generator of the present embodiment, the spring 25 drives the lower pressure cover 26 to move downward, and the lower pressure cover 26 pushes the upper plate body 21 to move downward, so that the limiting column 16 enters the limiting hole 20, and at the same time, the docking pipe 28 is located inside the lower pressure cover 26, and is docked and connected with one end of the telescopic air outlet pipe 15; then the external air enters the box body 1 through the air inlet pipe 4, passes through the filter cylinder and the filter membrane 5 for dust filtration, and then enters the air compressor 3 for compression, and finally reaches the separation membrane tube 2 for nitrogen separation. In addition, before the air enters the air inlet pipe 4, a water tank can be used to filter the dust, and then enter the air inlet pipe 4, which can further improve the dust filtration effect; after the air enters the filter box 9, the motor 11 is started, driving the rotating shaft 12 to rotate, driving the multiple frames 13 to rotate, driving the filter membrane 5 to rotate, and filtering the filter. The dust in the box 9 is absorbed and filtered until the particle sensor 14 can no longer detect the dust, and then the air compressor 3 can be started, and the pump body can be used to draw air into the air compressor 3 for air compression; after the compression is completed, the air reaches the separation membrane tube 2 through the connecting pipe 17 for nitrogen separation, and finally, after the separation is completed, the nitrogen is discharged from the telescopic air outlet pipe 15; through the above-mentioned structural arrangement, the air is pre-treated to remove dust in the air, and the clogging of the separation membrane tube 2 resulting in poor separation efficiency and separation quality is avoided. When the separation membrane tube 2 needs to be taken out for replacement, the second handle 29 is held, the lower pressure cover 26 is first moved up, and then the frame is moved up to be taken out. After the lower pressure cover 26 is tightly held above the upper plate body 21, the separation membrane tube 2 can be quickly disassembled and installed by relying on the action of the spring 25 and the limiting column 16, thereby improving the efficiency of replacement and maintenance.

[0038] See also Figure 6 The present invention also provides a membrane separation nitrogen production method, comprising the following steps:

[0039] S1: holding the first handle 8 and placing the filter cartridge inside the air inlet pipe 4;

[0040] S2: Using the rebound mechanism to press down and install the separation membrane tube 2;

[0041] S3: passing the air into the filter box 9 through the air inlet pipe 4, and filtering the dust by the filter plate 7;

[0042] S4: the rotating unit drives the filter membrane 5 to perform secondary filtration on the air inside the filter box 9;

[0043] S5: relying on the pump body arranged outside the filter box 9, the air is drawn into the air compressor 3 for compression, and then enters the separation membrane tube 2 through the connecting pipe 17;

[0044] S6: The nitrogen is separated by the separation membrane tube 2 and then discharged from the telescopic outlet pipe 15 .

[0045] Among them, the first handle 8 is held to place the filter cartridge inside the air inlet pipe 4; the separation membrane tube 2 is pressed down and installed by using the rebound mechanism; the air is passed into the filter box 9 through the air inlet pipe 4, and the dust is filtered by the filter plate 7; the rotating unit drives the filter membrane 5 to perform secondary filtration on the air inside the filter box 9; the air is drawn into the air compressor 3 for compression by relying on the pump body arranged outside the filter box 9, and then enters the separation membrane tube 2 through the connecting pipe 17; the nitrogen is separated by relying on the separation membrane tube 2, and then discharged from the telescopic air outlet pipe 15.

[0046] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A membrane separation nitrogen generator, comprising a housing, a separation membrane tube, an air compressor and an air inlet pipe, wherein the separation membrane tube is arranged inside the housing, the air compressor is arranged inside the housing, and the air inlet pipe is connected to the air compressor, characterized in that: Also included are pre-processing components; The pretreatment component includes a filter cartridge and a plurality of filter membranes, wherein the filter cartridge is arranged inside the air intake pipe, and the plurality of filter membranes are arranged in sequence between the air intake pipe and the air compressor; The pretreatment component also includes a rotating unit, which is communicated with the intake pipe; the rotating unit includes a filter box, a cover, a motor, a rotating shaft, a plurality of frames and a particle sensor, the filter box is communicated with the intake pipe, the filter box is arranged inside the box, the cover is bolted to the top of the filter box, the motor is arranged above the cover, one end of the rotating shaft is fixedly connected to the output end of the motor, the other end of the rotating shaft passes through the cover and is fixedly connected to the plurality of frames, the plurality of filter membranes are respectively arranged inside the corresponding frames, and the particle sensor is arranged below the cover; The pretreatment component also includes an installation unit, which is arranged inside the box; the installation unit includes a rebound mechanism, a telescopic air outlet pipe, a frame, a plurality of limit columns, a connecting pipe, a first sealing ring and a door panel, the rebound mechanism is arranged on the inner top wall of the box, one end of the telescopic air outlet pipe passes through the box, the separation membrane tube is arranged on the frame, the rebound mechanism is arranged inside the box and is located above the frame, a plurality of limit columns are sequentially arranged below the frame, the box has a plurality of limit holes, and a plurality of limit columns are respectively adapted to the corresponding limit holes, one end of the connecting pipe is communicated with the separation membrane tube, the first sealing ring is arranged at the other end of the connecting pipe, the air inlet end of the air compressor is communicated with the filter box, the other end of the connecting pipe is communicated with the air outlet end of the air compressor, and the door panel is rotatably connected to the box; The frame body comprises an upper plate body, a lower plate body and a plurality of support rods, the two ends of the plurality of support rods are respectively fixedly connected to the upper plate body and the lower plate body, the plurality of limit posts are sequentially arranged below the lower plate body, and the separation membrane tube is arranged between the upper plate body and the lower plate body; The rebound mechanism includes two telescopic rods, two springs, a lower pressure cover, a second sealing ring, a butt joint tube and a plurality of second handles, the two ends of the two telescopic rods are respectively fixedly connected to the inner top wall of the box body and the lower pressure cover, the two ends of the two springs are respectively movably connected to the inner top wall of the box body and the lower pressure cover, the springs are sleeved on the outside of the telescopic rods, the lower pressure cover and the upper plate body abut against each other, one end of the butt joint tube is communicated with the top of the separation membrane tube, the other end of the butt joint tube passes through the upper plate body and is located inside the lower pressure cover, one end of the telescopic air outlet pipe is communicated with the other end of the butt joint tube, the second sealing ring is arranged between the lower pressure cover and the upper plate body, and a plurality of second handles are respectively arranged on the upper plate body, the lower plate body and the lower pressure cover.

2. The membrane separation nitrogen generator according to claim 1, characterized in that: The filter cartridge includes a sealing inner ring, a plurality of filter plates and a first handle. The plurality of filter plates are fixedly connected to the sealing inner ring and are sequentially distributed inside the sealing inner ring. The first handle is fixedly connected to the sealing inner ring and is located on one side of the sealing inner ring.

3. A membrane separation nitrogen production method, using the membrane separation nitrogen production machine as claimed in claim 2, characterized in that: The steps include: Holding the first handle, the filter cartridge is placed inside the air inlet pipe; Using the rebound mechanism to press down and install the separation membrane tube; The air is passed through the air inlet pipe into the filter box, and the dust is filtered by the filter plate; The rotating unit drives the filter membrane to perform secondary filtration on the air inside the filter box; Relying on a pump body arranged outside the filter box, air is drawn into the air compressor for compression, and then enters the separation membrane tube through a connecting pipe; The nitrogen is separated by a separation membrane tube and then discharged from the telescopic outlet pipe.

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