Liquefying device for helium separation and extraction

Abstract

The utility model belongs to the technical field of helium extraction, and particularly relates to a liquefying device for helium separation and extraction, which comprises supporting legs, an extraction adsorption structure mounted on the top surfaces of the supporting legs, a separation structure mounted at the top of the extraction adsorption structure, a storage structure connected to the right side of the extraction adsorption structure, and a cooling connection unit and a separation unit, the separating unit comprises a separating box, a sealing plate is connected into the rectangular through hole, a spring is connected to the bottom face of the sealing plate, a supporting plate is connected to the end, away from the sealing plate, of the spring, liquid discharging boxes are connected to the left end and the right end of the supporting plate, and liquid outlet pipes are connected to the bottom faces of the liquid discharging boxes. According to the liquefaction device for helium separation and extraction, after liquid nitrogen in the cooling box and air in the spiral pipe are condensed, impurity gas enters the bottom of the separation box in a liquid state, helium is located at the top of the separation box in a gas state, the liquid gas enables a sealing plate to compress a spring due to gravity, and the liquid gas is discharged; after discharging is completed, the spring recovers the sealing plate for sealing, and helium is prevented from flowing out.

Description

Technical Field

[0001] The utility model relates to the technical field of helium extraction, in particular to a liquefaction device for helium separation and extraction. Background Art

[0002] Helium is a very expensive rare gas. Its content in the air is very small, only 5 parts per million. Only some natural gas mines in the world have a small amount of relatively rich helium resources, and helium resources are concentrated in a very small number of countries. The existing helium purification methods include membrane separation, chemical catalysis, adsorption, and cryogenic separation.

[0003] The adsorption method is to separate the helium from the natural gas based on the difference in adsorption capacity of methane, helium, nitrogen and other components on the surface of solid adsorbent. In the prior art, the adsorption method is to pass the mixed gas into an adsorption column with adsorbent for adsorption operation, but the adsorbent has a certain adsorption capacity. If there are too many impurity gases in the mixed gas, the adsorbent will be saturated quickly, and the adsorption column needs to be replaced frequently. The replacement operation of the adsorption column is relatively troublesome, which reduces production efficiency.

[0004] For example, a liquefaction device for helium separation and extraction disclosed in Chinese patent CN216259924U is provided, through an extraction tank, a cooling chamber is provided above the interior of the extraction tank, a spiral tube is provided inside the cooling chamber, an air inlet pipe connected to the top of the spiral tube is provided on the top surface of the extraction tank, a separation mechanism is provided below the cooling chamber, and an adsorption mechanism is provided below the separation mechanism. The mixed gas is injected into the spiral tube from the air inlet pipe, and the liquid nitrogen inside the cooling chamber cools the gas. Most of the impurity gases except helium are cooled and liquefied. The mixture of liquid and gas enters the separation mechanism from the bottom of the spiral tube. The separation mechanism can completely separate the gas and liquid. The helium containing a small amount of impurity gas is transported into the adsorption mechanism by a pump to be adsorbed and purified by the adsorption column, and is discharged from the air collection pipe and collected. Since most of the impurity gases have been removed, the adsorption column will be more durable and does not need to be replaced frequently.

[0005] However, in the above-mentioned comparative documents, during the gas-liquid separation of impurity gases and helium in natural gas, since the separation box is connected to the inside of the liquid guide tube, helium may be lost due to the negative pressure during the liquid gas discharge, thereby greatly reducing the helium extraction efficiency.

[0006] For this reason, we urgently need to provide a liquefaction device for helium separation and extraction. Utility Model Content

[0007] The purpose of the utility model is to provide a liquefaction device for helium separation and extraction, so as to solve the helium extraction problem of the liquefaction device for helium separation and extraction proposed in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquefaction device for helium separation and extraction, comprising a support leg, an extraction adsorption structure is installed on the top surface of the support leg, a separation structure is installed on the top of the extraction adsorption structure, and a storage structure is connected to the right side of the extraction adsorption structure.

[0009] The separation structure includes a cooling connection unit and a separation unit.

[0010] The separation unit includes a separation box, a rectangular through hole is opened in the middle of the bottom surface of the separation box, a sealing plate is connected to the inside of the rectangular through hole, a spring is connected to the bottom surface of the sealing plate, the end of the spring away from the sealing plate is connected to a support plate, the left and right ends of the support plate are connected to a drainage box, and the bottom surface of the drainage box is connected to a liquid outlet pipe.

[0011] Preferably, the cooling connection unit includes an air intake pipe, a spiral tube is connected to the bottom end of the air intake pipe, a cooling box is connected to the outer surface of the air intake pipe near one end of the spiral tube, a nitrogen inlet pipe is installed in the middle of the right side of the cooling box, and a connecting tube is connected to the end of the spiral tube away from the air intake pipe.

[0012] Preferably, the end of the outer surface of the connecting pipe away from the spiral pipe is fixedly connected to the inside of the circular hole in the middle of the top surface of the separation box, and the outer surface of the sealing plate is sealed and slidably connected to the inner wall of the rectangular through hole in the middle of the bottom surface of the separation box. The air inlet pipe, the liquid outlet pipe and the connecting pipe are all equipped with a one-way valve.

[0013] Preferably, the extraction and adsorption structure includes an air pump, the output end of the air pump is connected to an air pipe, the end of the outer surface of the air pipe away from the air pump is connected to an adsorption column, the bottom of the adsorption column is connected to an extraction tank, an asynchronous motor is installed in the middle of the bottom surface of the extraction tank, and the output end of the asynchronous motor is connected to an auger.

[0014] Preferably, the air pump input end is connected to the top of the separation box, a circular hole is opened in the middle of the top surface of the extraction tank, and the inside is fixedly connected to the outer surface of the air inlet pipe, and the bottom surface of the extraction tank is fixedly connected to the top of the support leg. The adsorption column is filled with adsorbent, and a one-way valve is installed on the air delivery pipe.

[0015] Preferably, the storage structure includes a positioning plate, a high-pressure pump is installed on the top surface of the positioning plate, the input end of the high-pressure pump is connected to a pressure relief pipe, the output end of the high-pressure pump is connected to an air duct, and the end of the air duct away from the high-pressure pump is connected to a storage tank.

[0016] Preferably, the left side of the positioning plate is fixedly connected to the right side of the outer surface of the extraction tank near the bottom, and the end of the pressure relief pipe away from the high-pressure pump is connected to the bottom of the extraction tank. One-way valves are installed on the pressure relief pipe and the air guide pipe.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The liquefaction device for helium separation and extraction, through the setting of the separation unit, uses the liquid nitrogen inside the cooling box and the air inside the spiral tube to condense, so that the impurity gas enters the bottom of the separation box in liquid state, and the helium is in gaseous state at the top of the separation box. The liquid gas compresses the spring on the sealing plate due to gravity, thereby discharging the liquid gas. After the discharge is completed, the spring restores the sealing plate to seal, thereby preventing the helium from flowing out.

[0019] 2. The helium separation and extraction liquefaction device, through the setting of the extraction adsorption structure, uses an asynchronous motor to drive the auger to rotate, thereby stirring the adsorbent filled in the adsorption column to increase the adsorption of the adsorbent and the impurity gas remaining in the helium, which can make the adsorption and purification effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the internal structure of the separation structure and the adsorption structure of the utility model;

[0023] Figure 4 for Figure 3 A magnified view of the structure in the middle.

[0024] In the figure: 1. support leg; 101. air inlet pipe; 102. spiral tube; 103. cooling box; 104. nitrogen inlet pipe; 105. connecting pipe; 106. separation box; 107. sealing plate; 108. spring; 109. support plate; 110. drain box; 111. liquid outlet pipe; 201. air pump; 202. air pipeline; 203. adsorption column; 204. extraction tank; 205. asynchronous motor; 206. auger; 301. positioning plate; 302. high-pressure pump; 303. pressure relief pipe; 304. air guide pipe; 305. storage tank. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0027] Embodiment 1:

[0028] A liquefaction device for helium separation and extraction comprises a support leg 1, an extraction adsorption structure is installed on the top surface of the support leg 1, a separation structure is installed on the top of the extraction adsorption structure, and a storage structure is connected to the right side of the extraction adsorption structure.

[0029] The separation structure includes a cooling connection unit and a separation unit. The separation unit includes a separation box 106, a rectangular through hole is opened in the middle of the bottom surface of the separation box 106, a sealing plate 107 is connected inside the rectangular through hole, a spring 108 is connected to the bottom surface of the sealing plate 107, the end of the spring 108 away from the sealing plate 107 is connected to a support plate 109, the left and right ends of the support plate 109 are connected to a drain box 110, and the bottom surface of the drain box 110 is connected to a liquid outlet pipe 111. The cooling connection unit includes an air intake pipe 101, a spiral tube 102 is connected to the bottom end of the air intake pipe 101, a cooling box 103 is connected to the outer surface of the air intake pipe 101 near the end of the spiral tube 102, a nitrogen inlet pipe 104 is installed in the middle of the right side of the cooling box 103, and a connecting pipe 105 is connected to the end of the spiral tube 102 away from the air intake pipe 101.

[0030] The end of the outer surface of the connecting tube 105 away from the spiral tube 102 is fixedly connected to the inside of the circular hole opened in the middle of the top surface of the separation box 106, and the outer surface of the sealing plate 107 is sealed and slidably connected to the inner wall of the rectangular through hole opened in the middle of the bottom surface of the separation box 106.

[0031] By setting up the separation unit, after the liquid nitrogen inside the cooling box 103 is condensed with the air inside the spiral tube 102, the impurity gas enters the bottom of the separation box 106 in liquid state, and the helium is in gaseous state at the top of the separation box 106. The liquid gas causes the sealing plate 107 to compress the spring 108 due to gravity, thereby discharging the liquid gas. After the discharge, the spring 108 recovers and the sealing plate 107 is sealed to prevent the helium from flowing out.

[0032] When separating the gases, the mixed gas is injected through the air inlet pipe 101 and cooled by the liquid nitrogen inside the cooling box 103, so that the mixed gas inside the spiral tube 102 is separated into gaseous and liquid states, and enters the separation box 106 through the connecting pipe 105, the liquid gas enters the bottom of the separation box 106, and the helium enters the top of the separation box 106. After the liquid gas enters, the sealing plate 107 moves downward due to gravity, compressing the spring 108. After the sealing plate 107 leaves the rectangular through hole in the middle of the bottom surface of the separation box 106, a gap is generated, so that the liquid gas can enter the liquid discharge box 110, and then be discharged through the liquid outlet pipe 111. As the liquid gas decreases, the sealing plate 107 moves upward until the liquid gas is completely discharged and sealed, thereby effectively reducing the loss of helium.

[0033] Embodiment 2:

[0034] The extraction and adsorption structure includes an air pump 201, the output end of the air pump 201 is connected to an air delivery pipe 202, the end of the outer surface of the air delivery pipe 202 away from the air pump 201 is connected to an adsorption column 203, the bottom of the adsorption column 203 is connected to an extraction tank 204, an asynchronous motor 205 is installed in the middle of the bottom surface of the extraction tank 204, and the output end of the asynchronous motor 205 is connected to an auger 206. The input end of the air pump 201 is connected to the top of the separation box 106, a circular hole is opened in the middle of the top surface of the extraction tank 204, and the inside is fixedly connected to the outer surface of the air inlet pipe 101, and the bottom surface of the extraction tank 204 is fixedly connected to the top of the support leg 1.

[0035] The storage structure includes a positioning plate 301, a high-pressure pump 302 is installed on the top surface of the positioning plate 301, a pressure relief pipe 303 is connected to the input end of the high-pressure pump 302, an air guide pipe 304 is connected to the output end of the high-pressure pump 302, and a storage tank 305 is connected to the end of the air guide pipe 304 away from the high-pressure pump 302. The left side of the positioning plate 301 is fixedly connected to the right side of the outer surface of the extraction tank 204 near the bottom, and the end of the pressure relief pipe 303 away from the high-pressure pump 302 is connected to the bottom of the extraction tank 204.

[0036] By setting up the extraction adsorption structure, the asynchronous motor 205 is used to drive the auger 206 to rotate, so as to stir the adsorbent filled in the adsorption column 203 to increase the adsorption of the impurity gas remaining in the adsorbent and helium, which can achieve a better adsorption and purification effect.

[0037] After the gas is separated, it is transported to the bottom of the extraction tank 204 through the air pump 201, and then the asynchronous motor 205 is started to drive the auger 206 to rotate, thereby stirring the adsorbent inside the adsorption column 203 to increase the contact area between the adsorbent and the gas. At the same time, when the air pump 201 is transporting the gas, it will cause high pressure to be generated in the closed space at the bottom of the extraction tank 204, thereby enhancing the adsorption reaction of the adsorbent. After the adsorption reaction is completed, the high-pressure pump 302 is turned on to pump the helium and transport it into the storage tank 305 for storage. At the same time, the bottom of the extraction tank 204 can be depressurized to restore the adsorbent.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A liquefaction device for helium separation and extraction, comprising a support leg (1), characterized in that: The top surface of the support leg (1) is equipped with an extraction and adsorption structure, the top of the extraction and adsorption structure is equipped with a separation structure, and the right side of the extraction and adsorption structure is connected to a storage structure; The separation structure includes a cooling connection unit and a separation unit; The separation unit comprises a separation box (106), a rectangular through hole is opened in the middle of the bottom surface of the separation box (106), a sealing plate (107) is connected inside the rectangular through hole, a spring (108) is connected to the bottom surface of the sealing plate (107), an end of the spring (108) away from the sealing plate (107) is connected to a support plate (109), the left and right ends of the support plate (109) are connected to a drainage box (110), and the bottom surface of the drainage box (110) is connected to a liquid outlet pipe (111).

2. A liquefaction device for helium separation and extraction according to claim 1, characterized in that: The cooling connection unit comprises an air intake pipe (101), the bottom end of the air intake pipe (101) is connected to a spiral tube (102), the outer surface of the air intake pipe (101) close to one end of the spiral tube (102) is connected to a cooling box (103), a nitrogen inlet pipe (104) is installed in the middle of the right side of the cooling box (103), and the end of the spiral tube (102) away from the air intake pipe (101) is connected to a connecting tube (105).

3. A liquefaction device for helium separation and extraction according to claim 2, characterized in that: The end of the outer surface of the connecting tube (105) away from the spiral tube (102) is fixedly connected to the inside of a circular hole opened in the middle of the top surface of the separation box (106), and the outer surface of the sealing plate (107) is sealingly and slidably connected to the inner wall of a rectangular through hole opened in the middle of the bottom surface of the separation box (106).

4. A liquefaction device for helium separation and extraction according to claim 1, characterized in that: The extraction and adsorption structure comprises an air pump (201), the output end of the air pump (201) is connected to an air supply pipe (202), the end of the outer surface of the air supply pipe (202) away from the air pump (201) is connected to an adsorption column (203), the bottom of the adsorption column (203) is connected to an extraction tank (204), an asynchronous motor (205) is installed in the middle of the bottom surface of the extraction tank (204), and the output end of the asynchronous motor (205) is connected to an auger (206).

5. A liquefaction device for helium separation and extraction according to claim 4, characterized in that: The input end of the air pump (201) is connected to the top of the separation box (106), a circular hole is provided in the middle of the top surface of the extraction tank (204), the inside of which is fixedly connected to the outer surface of the air inlet pipe (101), and the bottom surface of the extraction tank (204) is fixedly connected to the top of the support leg (1).

6. A liquefaction device for helium separation and extraction according to claim 1, characterized in that: The storage structure comprises a positioning plate (301), a high-pressure pump (302) is installed on the top surface of the positioning plate (301), an input end of the high-pressure pump (302) is connected to a pressure relief pipe (303), an output end of the high-pressure pump (302) is connected to an air guide pipe (304), and an end of the air guide pipe (304) away from the high-pressure pump (302) is connected to a storage tank (305).

7. A liquefaction device for helium separation and extraction according to claim 6, characterized in that: The left side of the positioning plate (301) is fixedly connected to the right side of the outer surface of the extraction tank (204) near the bottom end, and the end of the pressure relief pipe (303) away from the high-pressure pump (302) is connected to the bottom of the extraction tank (204).

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