Device for safely preparing high-purity helium by using natural gas

Abstract

The invention provides a device for safely preparing high-purity helium by using natural gas, and relates to the technical field of helium preparation, the device comprises a preparation cylinder and a purification cylinder, the inner side of the preparation cylinder is fixedly connected with a separation cylinder, the inner side of the separation cylinder is fixedly connected with a separation membrane, a delivery pipe is fixedly connected between the purification cylinder and the preparation cylinder, and the delivery pipe is fixedly connected with the purification cylinder. A compressor is arranged on the outer side of the conveying pipe, a partition plate is fixedly connected to the inner side of the purification barrel, and a fixing barrel and a condensation pipe are fixedly connected to the upper side of the partition plate. By arranging a separation cylinder, a separation membrane and a purification cylinder, helium can be conveniently prepared and purified, and by means of a fixing box, a mounting cylinder, a connecting pipe, a gas inlet pipe, an electromagnetic valve, an inclined plate and a pressure plate, when natural gas is introduced, a lifting block is conveniently separated from the pressure plate, the electromagnetic valve is started to cut off introduction of the natural gas, and accidents caused by continuous introduction of the natural gas and leakage are avoided; the safety during preparation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of helium preparation, and specifically to a device for safely preparing high-purity helium using natural gas. Background Art

[0002] Natural gas is a clean fossil energy mainly composed of methane, which is widely used for power generation, industrial fuel, residential life, and chemical raw materials. When using natural gas to prepare helium, the membrane separation method is used to prepare helium, and the helium molecules (with a diameter of 0.26 nm) are separated from other gases (such as CH4 with a diameter of 0.38 nm) by using the difference in their permeation rates.

[0003] After retrieval, a Chinese patent with the application number "CN202022734572.6" is specifically a device for preparing high-purity helium using natural gas. First, after the user sends natural gas into the separation cylinder through the inlet pipe, the first motor and the second motor can be started through the operation panel, so that the first motor drives the first rotating shaft to rotate, thereby making the stirring blades rotate, so as to stir the natural gas inside the separation cylinder to improve the fluidity of the natural gas. At the same time, when the second motor is started, the second rotating shaft drives the fan blades to rotate. After the fan blades rotate, the generated air flow is discharged to the ventilation holes on the outer surface of the stirring blades, thereby improving the air flow inside the separation cylinder. Subsequently, helium passes through the separation membrane, and the crude helium is sent to the exhaust pipe under the action of the compressor through the guide pipe, so that the crude helium enters the collection cylinder. Under the action of liquid nitrogen in the liquid nitrogen tank, the helium is guided into the condensation pipe under the action of the gasket, so that the helium can be refined through the condensation pipe, and other mixed gases are liquefied and flow down from the inside of the condensation pipe, and the liquefied mixed gases will accumulate in the collection cylinder, thus effectively preventing the liquefied mixed gases from flowing back into the separation box. Subsequently, the user can open the solenoid valve through the operation panel, so that the liquefied mixed gases will flow out through the water outlet pipe, and then continue to refine the helium.

[0004] The prior art purifies helium through a separation membrane combined with a condensation pipe. However, when purifying, natural gas is introduced into the separation cylinder for separation. The inlet pipe is prone to leakage of natural gas from the connection after long-term use. After the natural gas leaks and mixes with air, it will explode when the concentration reaches 5% - 15% in case of a fire source, posing a safety hazard, and the staff cannot detect the leakage of natural gas in time. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the present invention provides a device for safely preparing high-purity helium using natural gas, which solves the problem of natural gas leakage during helium preparation, posing a safety hazard.

[0007] (2) Technical solution

[0008] To achieve the above object, the present invention is realized through the following technical solutions: A device for safely preparing high-purity helium gas using natural gas, including a preparation cylinder and a purification cylinder. A separation cylinder is fixedly connected inside the preparation cylinder, a separation membrane is fixedly connected inside the separation cylinder, a delivery pipe is fixedly connected between the purification cylinder and the preparation cylinder, a compressor is arranged outside the delivery pipe, a partition is fixedly connected inside the purification cylinder, a fixed cylinder and a condensation pipe are fixedly connected above the partition, a liquid discharge pipe is fixedly connected to the right side of the purification cylinder, a liquid addition pipe is fixedly connected to the upper side of the purification cylinder, a fixed pipe is fixedly connected between the condensation pipe and the delivery pipe, a cover plate is fixedly connected to the upper side of the preparation cylinder, and an intake safety unit for the safety of natural gas intake is arranged above the cover plate.

[0009] Preferably, the intake safety unit includes a fixed box fixedly connected to the upper side of the cover plate. A connecting pipe is fixedly connected to the upper side of the cover plate. An intake pipe is arranged above the connecting pipe. Flange plates are fixedly connected to the outer ends of the intake pipe and the connecting pipe. A top cover is arranged on the upper side of the fixed box. Installation cylinders are fixedly connected to the left and right sides of the fixed box. Piston plates are arranged inside the installation cylinders on the left and right sides. A moving rod is fixedly connected to the outer side of the piston plate. The outer end of the moving rod passes through the outer side of the installation cylinder and is fixedly connected to a moving plate. Inclined plates are rotatably connected to the front sides of the moving plates on the left and right sides. A rotating block is rotatably connected to the outer side of the lower end of the inclined plate. A lifting block is fixedly connected to the lower side of the rotating block. A pressure plate and a front block are fixedly connected to the front side of the fixed box. An expansion rod is fixedly connected between the front block and the lifting block. An electromagnetic valve is arranged outside the intake pipe.

[0010] Preferably, a spring is fixedly connected between the outer side of the piston plate and the inner wall of the installation cylinder.

[0011] Preferably, an alarm is fixedly connected to the upper side of the top cover.

[0012] Preferably, through holes are formed in the left and right inner walls of the fixed box, and the through holes communicate with the fixed box.

[0013] Preferably, the moving plate is arranged in an L-shaped structure.

[0014] Preferably, the lower end of the condensation pipe passes through the lower side of the partition, and the upper end of the condensation pipe passes through the upper side of the purification cylinder.

[0015] (3) Beneficial effects

[0016] The present invention provides a device for safely preparing high-purity helium gas using natural gas. It has the following beneficial effects:

[0017] By providing a separation cylinder, a separation membrane, and a purification cylinder, it is convenient to prepare and purify helium gas. Through the fixed box, the installation cylinder, the connecting pipe, the inlet pipe, the solenoid valve, the inclined plate, and the pressure plate, when natural gas is introduced, the lifting block is separated from the pressure plate, and the solenoid valve is activated to cut off the introduction of natural gas, avoiding accidents caused by the continuous leakage of natural gas during introduction and increasing the safety during preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 7 is an overall three-dimensional structure diagram of an apparatus for safely preparing high-purity helium gas using natural gas according to the present invention;

[0019] Figure 2 FIG. 11 is a sectional three-dimensional structure diagram of an apparatus for safely preparing high-purity helium gas using natural gas according to the present invention;

[0020] Figure 3 FIG. 15 is a three-dimensional structure diagram of an intake safety unit in an apparatus for safely preparing high-purity helium gas using natural gas according to the present invention;

[0021] Figure 4 FIG. 19 is a sectional three-dimensional structure diagram of an intake safety unit in an apparatus for safely preparing high-purity helium gas using natural gas according to the present invention;

[0022] Figure 5 FIG. 23 is a partial three-dimensional structure diagram of an intake safety unit in an apparatus for safely preparing high-purity helium gas using natural gas according to the present invention;

[0023] Figure 6 is Figure 5 an enlarged view of part A in FIG.

[0024] Wherein, 1, preparation cylinder; 2, delivery pipe; 3, compressor; 4, purification cylinder; 5, intake safety unit; 6, drain pipe; 7, liquid adding pipe; 8, condenser; 9, separation cylinder; 10, separation membrane; 11, partition board; 12, fixed cylinder; 13, fixed pipe; 14, cover plate; 501, fixed box; 502, top cover; 503, alarm; 504, inlet pipe; 505, solenoid valve; 506, flange; 507, connecting pipe; 508, through hole; 509, installation cylinder; 510, piston disk; 511, spring; 512, moving rod; 513, moving plate; 514, inclined plate; 515, rotating block; 516, lifting block; 517, pressure plate; 518, telescopic rod; 519, front block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] 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 only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] As Figure 1 - Figure 6 shown, an apparatus for safely preparing high-purity helium using natural gas according to an embodiment of the present invention includes a preparation cylinder 1 and a purification cylinder 4. A separation cylinder 9 is fixedly connected to the inner side of the preparation cylinder 1, and a separation membrane 10 is fixedly connected to the inner side of the separation cylinder 9. A delivery pipe 2 is fixedly connected between the purification cylinder 4 and the preparation cylinder 1. A compressor 3 is arranged on the outer side of the delivery pipe 2. A partition 11 is fixedly connected to the inner side of the purification cylinder 4. A fixed cylinder 12 and a condensing pipe 8 are fixedly connected to the upper side of the partition 11. A drain pipe 6 is fixedly connected to the right side of the purification cylinder 4. A liquid adding pipe 7 is fixedly connected to the upper side of the purification cylinder 4. A fixed pipe 13 is fixedly connected between the condensing pipe 8 and the delivery pipe 2. A cover plate 14 is fixedly connected to the upper side of the preparation cylinder 1. An intake safety unit 5 for the safety of natural gas intake is arranged on the upper side of the cover plate 14. The lower end of the condensing pipe 8 passes through the lower side of the partition 11, and the upper end of the condensing pipe 8 passes through the upper side of the purification cylinder 4. When preparing helium, first, natural gas is introduced into the preparation cylinder 1 through the intake safety unit 5, and then helium is separated by the separation cylinder 9 and the separation membrane 10. Then the remaining gas (mixed with some helium) is transported to the purification cylinder 4 through the compressor 3 and the delivery pipe 2, and the gas is introduced into the condensing pipe 8 through the fixed pipe 13. The liquid adding pipe 7 heats liquid nitrogen for cooling, so that the condensing pipe 8 condenses the gas, and the gas passes through the bottom of the purification cylinder 4, and the liquid is discharged through the drain pipe 6, achieving the effect of nitrogen purification.

[0027] The intake air safety unit 5 includes a fixed box 501 which is fixedly connected to the upper side of the cover plate 14. A connecting pipe 507 is fixedly connected to the upper side of the cover plate 14. An intake pipe 504 is arranged above the connecting pipe 507. Flange plates 506 are fixedly connected to the outer ends of both the intake pipe 504 and the connecting pipe 507. A top cover 502 is arranged on the upper side of the fixed box 501. Installation cylinders 509 are fixedly connected to both the left and right sides of the fixed box 501. Piston plates 510 are arranged inside the installation cylinders 509 on both the left and right sides. A moving rod 512 is fixedly connected to the outer side of the piston plate 510. The outer end of the moving rod 512 passes through the outer side of the installation cylinder 509 and is fixedly connected to a moving plate 513. Inclined plates 514 are rotatably connected to the front sides of the moving plates 513 on both the left and right sides. A rotating block 515 is rotatably connected to the outer side of the lower end of the inclined plate 514. A lifting block 516 is fixedly connected to the lower side of the rotating block 515. A pressure plate 517 and a front block 519 are fixedly connected to the front side of the fixed box 501. A telescopic rod 518 is fixedly connected between the front block 519 and the lifting block 516. An electromagnetic valve 505 is arranged on the outer side of the intake pipe 504. Through holes 508 are formed in both the left and right inner walls of the fixed box 501, and the through holes 508 communicate with the fixed box 501. A spring 511 is fixedly connected between the outer side of the piston plate 510 and the inner wall of the installation cylinder 509. The moving plate 513 is arranged in an L-shaped structure. During preparation, the flange plate 506 on the intake pipe 504 is connected to the flange plate 506 on the connecting pipe 507, and the top cover 502 is installed through multiple bolts. A rubber pad is arranged between the top cover 502 and the fixed box 501 for convenient sealing. An outer PLC controller controls the alarm 503 and the electromagnetic valve 505. When natural gas is introduced, if natural gas leaks from the flange plate 506, then the natural gas enters the installation cylinder 509 through the through hole 508. The natural gas pushes the piston plate 510 to move. The piston plate 510 drives the moving rod 512 to move. The moving rod 512 drives the moving plate 513 to move. The moving plates 513 on both the left and right sides move away from each other. The moving plate 513 drives the inclined plate 514 to rotate. The inclined plate 514 drives the lifting block 516 to rise, separating the lifting block 516 from the pressure plate 517. The PLC controller is electrically connected to the pressure plate 517. An alarm 503 is fixedly connected to the upper side of the top cover 502. At this time, the alarm 503 and the electromagnetic valve 505 are activated, cutting off the introduction of natural gas and timely warning the staff to conduct maintenance, increasing the safety during preparation.

[0028] Working principle: During use, natural gas is introduced into the preparation cylinder 1 through the intake pipe 504, and helium is separated through the separation membrane 10. Then it is transported to the purification cylinder 4 through the delivery pipe 2, and the gas is condensed through the condenser 8. The drain pipe 6 discharges the liquid (the mixed gas except helium is liquefied) to purify helium.

[0029] When natural gas leaks at the flange 506, the natural gas pushes the piston disc 510 to move. Under the action of the moving rod 512, the moving plate 513, and the inclined plate 514, the lifting block 516 is controlled to rise and separate from the pressure plate 517, so that the solenoid valve 505 is activated to cut off the access of natural gas, and the alarm 503 is activated to facilitate timely maintenance by the staff.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for safely preparing high-purity helium using natural gas, comprising a preparation cylinder (1) and a purification cylinder (4), wherein a separation cylinder (9) is fixedly connected to the inner side of the preparation cylinder (1), a separation membrane (10) is fixedly connected to the inner side of the separation cylinder (9), a delivery pipe (2) is fixedly connected between the purification cylinder (4) and the preparation cylinder (1), a compressor (3) is arranged on the outer side of the delivery pipe (2), a partition (11) is fixedly connected to the inner side of the purification cylinder (4), a fixed cylinder (12) and a condenser (8) are fixedly connected to the upper side of the partition (11), a drain pipe (6) is fixedly connected to the right side of the purification cylinder (4), a liquid adding pipe (7) is fixedly connected to the upper side of the purification cylinder (4), a fixed pipe (13) is fixedly connected between the condenser (8) and the delivery pipe (2), characterized in that: A cover plate (14) is fixedly connected to the upper side of the preparation cylinder (1), and an intake safety unit (5) for ensuring the safety of natural gas intake is arranged on the upper side of the cover plate (14).

2. The device for safely preparing high-purity helium using natural gas according to claim 1, characterized in that: The air intake safety unit (5) comprises a fixed box (501), the fixed box (501) is fixedly connected to the upper side of the cover plate (14), a connecting pipe (507) is fixedly connected to the upper side of the cover plate (14), an air intake pipe (504) is arranged above the connecting pipe (507), the outer end of the air intake pipe (504) and the outer end of the connecting pipe (507) are both fixedly connected to a flange plate (506), a top cover (502) is arranged on the upper side of the fixed box (501), the left and right sides of the fixed box (501) are both fixedly connected to mounting cylinders (509), the inner sides of the mounting cylinders (509) on the left and right sides are both provided with piston discs (510), the outer sides of the piston discs (510) are The side of the fixed box (501) is fixedly connected with a moving rod (512), the outer end of the moving rod (512) passes through the outer side of the mounting tube (509) and is fixedly connected with a moving plate (513), the front sides of the moving plates (513) on the left and right sides are rotatably connected with inclined plates (514), the outer side of the lower end of the inclined plate (514) is rotatably connected with a rotating block (515), the lower side of the rotating block (515) is fixedly connected with a lifting block (516), the front side of the fixed box (501) is fixedly connected with a pressure plate (517) and a front block (519), a telescopic rod (518) is fixedly connected between the front block (519) and the lifting block (516), and a solenoid valve (505) is arranged on the outer side of the intake pipe (504).

3. The device for safely preparing high-purity helium using natural gas according to claim 2, characterized in that: A spring (511) is fixedly connected between the outer side of the piston disc (510) and the inner wall of the mounting cylinder (509).

4. The device for safely preparing high-purity helium using natural gas according to claim 2, characterized in that: An alarm (503) is fixedly connected to the upper side of the top cover (502).

5. The device for safely preparing high-purity helium using natural gas according to claim 2, characterized in that: The left and right inner walls of the fixed box (501) are both provided with through holes (508), and the through holes (508) are in communication with the fixed box (501).

6. The device for safely preparing high-purity helium using natural gas according to claim 2, characterized in that: The movable plate (513) is arranged in an L-shaped structure.

7. The device for safely preparing high-purity helium using natural gas according to claim 1, characterized in that: The lower end of the condenser tube (8) passes through the lower side of the partition (11), and the upper end of the condenser tube (8) passes through the upper side of the purification cylinder (4).

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