Helium extraction device utilizing flash steam

Abstract

The utility model discloses a helium extraction device utilizing flash steam, which relates to the technical field of helium extraction, and comprises a heat exchanger and a helium extraction tower communicated with the heat exchanger, a gas inlet of the heat exchanger is provided with two gas-guide tubes which are symmetrically arranged, and one sides of the two gas-guide tubes which are far away from each other are respectively communicated with a gas inlet tube and a gas outlet tube. The air outlet pipe is communicated with the heat exchanger, two symmetrically arranged filter pipes are arranged between the two air guide pipes, filter screens are fixedly embedded in the filter pipes, the two ends of the air guide pipes are communicated with connecting pipes, the connecting pipes are communicated with the filter pipes through flanges, a supporting plate is fixedly arranged between the two air guide pipes, and supporting blocks are fixedly arranged on the two sides of the supporting plate. According to the heat exchanger, the gas inlet pipe, the gas outlet pipe, the gas guide pipe, the connecting pipe, the filter pipe, the filter screen, the supporting block and the installation positioning mechanism, flash steam entering the heat exchanger can be filtered, and it is avoided as much as possible that internal impurities block the heat exchange pipe and affect helium production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of helium extraction technology, specifically to a helium extraction device utilizing flash vapor. Background Technology

[0002] Flash vapor itself is an energy-rich resource. When the pressure of a high-temperature, high-pressure gas drops rapidly, its boiling point decreases, and it undergoes an instantaneous vaporization process, allowing the gas and liquid to separate. The energy released during this vaporization process can be effectively utilized. By using flash vapor to prepare helium, not only can this energy be effectively recovered and utilized, but helium can also be extracted from the flash vapor, maximizing the utilization of resources.

[0003] A search revealed that patent CN205939932U discloses a system for extracting high-purity helium from liquefied natural gas (LNG) flash vapor. This system utilizes a mixed refrigerant-nitrogen cycle to refrigerate helium-rich flash vapor from LNG tanks, liquefying it before distillation to produce crude helium (containing over 70% helium), LNG, and liquid nitrogen. The crude helium is then subjected to oxygenation catalytic dehydrogenation, condensation adsorption dehydration, and condensation adsorption denitrification processes to obtain high-purity helium with a purity of 99.999%, demonstrating high extraction efficiency. This invention not only extracts high-purity helium but also produces LNG, reducing energy consumption, improving resource utilization, and resulting in significant economic benefits.

[0004] During the preparation of flash vapor, some particulate impurities may be present inside the flash vapor due to production processes. When the flash vapor enters the heat exchanger to prepare helium, these particulate impurities can easily adhere to the inside of the heat exchanger pipes, causing blockages and affecting the heat exchange effect and overall helium preparation efficiency. Utility Model Content

[0005] In view of the problems existing in the current helium extraction device that utilizes flash vapor, this utility model is proposed.

[0006] Therefore, the purpose of this invention is to provide a helium extraction device using flash vapor, which solves the problem that when flash vapor enters the heat exchanger for helium preparation, particulate impurities inside the flash vapor easily adhere to the inside of the heat exchanger pipes, causing blockage inside the pipes, thus affecting the heat exchange effect and the overall helium preparation efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A helium extraction device utilizing flash vapor includes a heat exchanger and a helium extraction tower connected to the heat exchanger. The heat exchanger has two symmetrically arranged gas guide pipes at its inlet. The two gas guide pipes are connected to an inlet pipe and an outlet pipe on opposite sides. The outlet pipe is connected to the heat exchanger. Two symmetrically arranged filter pipes are arranged between the two gas guide pipes. A filter screen is fixedly embedded inside each filter pipe. Connecting pipes are connected to both ends of each gas guide pipe, and the connecting pipes and filter pipes are connected via flanges. A support plate is fixed between the two gas guide pipes. Support blocks are fixed on both sides of the support plate. The filter pipe is located inside the end of each support block. Installation and positioning mechanisms are provided on both sides of each support block.

[0009] Both ends of the air guide pipe are fixedly fitted with switching valves, and the valve stems of the two switching valves are jointly provided with a drive switching mechanism.

[0010] Preferably, the installation and positioning mechanism includes a locking rod, a through hole for the locking rod to pass through on the side of the support block, two symmetrically arranged mounting plates fixed on the outer wall of the support block, a crossbar rotatably passing between the two mounting plates, the locking rod being fixedly sleeved on the outside of the crossbar, two symmetrically arranged slots on the outer wall of the filter tube, the end of the locking rod passing through the through hole and inserted into the slot, and a torsion spring sleeved on both ends of the crossbar, the two ends of the torsion spring being fixedly connected to the crossbar and the mounting plate respectively.

[0011] Preferably, the end of the support block away from the support plate has a placement groove for connecting to the filter tube.

[0012] Preferably, the drive switching mechanism includes two symmetrically arranged worm gears, which are fixedly sleeved with the valve stem of the switching valve. Both worm gears are fitted with worms, which are fixedly connected. A fixing plate is fixedly provided on the outer wall of the support plate. The worms are rotatably inserted into the fixing plate, and a crank handle is fixedly provided at their ends.

[0013] Furthermore, the connecting pipe is a telescopic corrugated pipe.

[0014] Preferably, the lever is an L-shaped lever.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. This utility model, through the provided heat exchanger, inlet pipe, outlet pipe, guide pipe, connecting pipe, filter pipe and filter screen, as well as support block and installation positioning mechanism, can filter the flash vapor entering the heat exchanger, and minimize the impact of internal impurities on the heat exchange tubes and thus affect the helium production efficiency.

[0017] 2. This utility model, through the provided gas guide pipe, switching valve, support block, filter pipe, installation positioning mechanism and drive switching mechanism, can separately switch the use of the filter pipes on both sides, ensuring that the helium production work can continue while the filter screen can be easily replaced, ensuring that the flash vapor can enter the heat exchanger cleanly to complete the helium production work. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of part A;

[0021] Figure 3 This is a three-dimensional structural diagram of the support block and filter tube of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Heat exchanger; 2. Helium extraction tower; 3. Gas guide pipe; 4. Gas inlet pipe; 5. Gas outlet pipe; 6. Filter tube; 7. Filter screen; 8. Connecting pipe; 9. Flange; 10. Support plate; 11. Support block; 12. Switching valve; 13. Clamping rod; 14. Mounting plate; 15. Crossbar; 16. Torsion spring; 17. Worm gear; 18. Worm; 19. Fixing plate; 20. Handle. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model discloses a helium extraction device utilizing flash vapor.

[0026] This utility model provides, for example Figure 1-3The helium extraction device using flash vapor shown includes a heat exchanger 1 and a helium extraction tower 2 connected to the heat exchanger 1. The inlet of the heat exchanger 1 is provided with two symmetrically arranged gas guide pipes 3. The two gas guide pipes 3 are respectively connected to an inlet pipe 4 and an outlet pipe 5 on the side away from each other. The outlet pipe 5 is connected to the heat exchanger 1. Two symmetrically arranged filter pipes 6 are provided between the two gas guide pipes 3. A filter screen 7 is fixedly embedded inside the filter pipe 6. Both ends of the gas guide pipes 3 are connected to a connecting pipe 8. The connecting pipe 8 is a telescopic corrugated pipe. The connecting pipe 8 and the filter pipe 6 are connected by a flange 9. A support plate 10 is fixedly provided between the two gas guide pipes 3. Support blocks 11 are fixedly provided on both sides of the support plate 10.

[0027] Both ends of the air duct 3 are fixedly fitted with switching valves 12. The valve stems of the two switching valves 12 are jointly provided with a drive switching mechanism. The drive switching mechanism includes two symmetrically arranged worm gears 17. The worm gears 17 are fixedly fitted with the valve stems of the switching valves 12. Both worm gears 17 are fitted with worms 18. The two worms 18 are fixedly connected. The outer wall of the support plate 10 is fixedly provided with a fixing plate 19. The worms 18 rotate through the fixing plate 19 and are fixedly provided with a crank handle 20 at their ends.

[0028] Before helium production, the two switching valves 12 operate separately, with one switching valve 12 open and the other switching valve 12 closed. Flash vapor is then introduced into the gas guide pipe 3 through the inlet pipe 4 and into the filter tube 6 through the open switching valve 12. At this time, with the support of the filter screen 7, impurities inside the flash vapor can be filtered, allowing pure flash vapor to enter the heat exchanger 1 and complete the crude extraction of helium in the helium extraction tower 2. When one side of the filter tube 6 has been used for a long time, the crank handle 20 can be turned to rotate the worm gear 18. This causes the two worm gears 18 to synchronously drive the two worm wheels 17 and the valve stem of the switching valve 12 to rotate, thus switching the working state of the two switching valves 12. With the connection of the flange 9, the used filter tube 6 can be disassembled and its internal filter screen 7 can be replaced, thereby ensuring the continuous and stable operation of helium extraction.

[0029] In order to enable quick disassembly and replacement of filter tube 6, such as Figure 2-3As shown, the filter tube 6 is located inside the end of the support block 11. The end of the support block 11 away from the support plate 10 has a placement groove for connecting the filter tube 6. Both sides of the support block 11 are provided with installation positioning mechanisms, including a locking rod 13, which is an L-shaped locking rod. The side of the support block 11 has a through hole for the locking rod 13 to pass through. Two symmetrically arranged mounting plates 14 are fixedly provided on the outer wall of the support block 11. A crossbar 15 is rotatably passed between the two mounting plates 14. The locking rod 13 is fixedly sleeved on the outside of the crossbar 15. Two symmetrically arranged slots are provided on the outer wall of the filter tube 6. The end of the locking rod 13 passes through the through hole and is inserted into the slot. Both ends of the crossbar 15 are sleeved with torsion springs 16, and the two ends of the torsion springs 16 are fixedly connected to the crossbar 15 and the mounting plate 14, respectively.

[0030] Before disassembling or assembling the filter tube 6, press the locking rods 13 on both sides of the support block 11, causing the locking rods 13 to rotate the crossbar 15. At this time, the bent end of the locking rod 13 is pulled out from the through hole and the slot, and the torsion spring 16 is twisted. Then the filter tube 6 can be connected or separated from the support block 11. When the filter tube 6 is inserted into the end of the support block 11, release the locking rod 13. Under the torque rebound of the torsion spring 16, the end of the locking rod 13 can be inserted into the slot to determine the position of the filter tube 6 and ensure the stable operation of the flash vapor treatment.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A helium extraction apparatus utilizing flash vapor, comprising a heat exchanger (1) and a helium extraction tower (2) connected to the heat exchanger (1), characterized in that, The heat exchanger (1) has two symmetrically arranged air guide pipes (3) at its air inlet. The two air guide pipes (3) are connected to an air inlet pipe (4) and an air outlet pipe (5) on opposite sides. The air outlet pipe (5) is connected to the heat exchanger (1). Two symmetrically arranged filter pipes (6) are provided between the two air guide pipes (3). A filter screen (7) is fixedly embedded inside the filter pipe (6). Both ends of the air guide pipe (3) are connected to a connecting pipe (8). The connecting pipe (8) and the filter pipe (6) are connected by a flange (9). A support plate (10) is fixed between the two air guide pipes (3). Support blocks (11) are fixed on both sides of the support plate (10). The filter pipe (6) is located inside the end of the support block (11). The support block (11) is provided with a mounting and positioning mechanism on both sides. Both ends of the air guide pipe (3) are fixedly fitted with switching valves (12), and the valve stems of the two switching valves (12) are jointly provided with a drive switching mechanism.

2. The helium extraction apparatus utilizing flash vapor according to claim 1, characterized in that, The installation and positioning mechanism includes a locking rod (13). The side of the support block (11) is provided with a through hole for the locking rod (13) to pass through. The outer wall of the support block (11) is fixedly provided with two symmetrically arranged mounting plates (14). A crossbar (15) is rotatably passed between the two mounting plates (14). The locking rod (13) is fixedly sleeved on the outside of the crossbar (15). The outer wall of the filter tube (6) is provided with two symmetrically arranged slots. The end of the locking rod (13) passes through the through hole and is inserted into the slot. Both ends of the crossbar (15) are sleeved with torsion springs (16). The two ends of the torsion springs (16) are fixedly connected to the crossbar (15) and the mounting plate (14) respectively.

3. The helium extraction apparatus utilizing flash vapor according to claim 1, characterized in that, The support block (11) has a placement groove at one end away from the support plate (10) for connecting to the filter tube (6).

4. The helium extraction apparatus utilizing flash vapor according to claim 1, characterized in that, The drive switching mechanism includes two symmetrically arranged worm gears (17), which are fixedly sleeved with the valve stem of the switching valve (12). Both worm gears (17) are fitted with worms (18), which are fixedly connected. The outer wall of the support plate (10) is fixedly provided with a fixing plate (19), and the worms (18) are rotatably inserted into the fixing plate (19), with a crank handle (20) fixedly provided at the end.

5. The helium extraction apparatus utilizing flash vapor according to claim 1, characterized in that, The connecting pipe (8) is a telescopic corrugated pipe.

6. The helium extraction apparatus utilizing flash vapor according to claim 2, characterized in that, The lever (13) is an L-shaped lever.

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