Crude helium extraction device

Abstract

The invention discloses a crude helium extraction device which comprises a dehydrogenation unit, a first heat exchanger, a first rectification assembly, a second rectification assembly and a gas outlet channel, raw material gas is introduced into an inlet of the dehydrogenation unit, and dehydrogenation treatment is conducted on the raw material gas; the first heat exchanger is communicated with the dehydrogenation unit, and is used for cooling primary gas after receiving the primary gas discharged by the dehydrogenation unit; the first rectification assembly is communicated with the first heat exchanger, and rectifies the first-stage gas after receiving the first-stage gas discharged by the first heat exchanger; the second rectification assembly is communicated with the first rectification assembly, and rectifies the secondary gas after receiving the secondary gas discharged by the first rectification assembly; the gas outlet channel is communicated with the second rectification assembly and is used for discharging the third-stage gas discharged by the second rectification assembly. In this way, the helium extraction rate and the crude helium purity can be improved.

Description

Technical Field

[0001] The present application relates to the field of chemical technology, and in particular to a crude helium extraction device. Background Art

[0002] In recent years, the worldwide demand for helium has continued to grow. Helium is widely used in aerospace, national defense and military industry, submarines, nuclear energy, electronics industry, medical nuclear magnetic resonance imaging, low-temperature superconducting equipment, airtightness inspection of high-end equipment, superfluid material preparation and other fields. The country's demand for helium has also increased year by year. The content of helium resources available for extraction on the earth is extremely small, and is mainly distributed in the atmosphere, water bodies, coal formations, oil and gas reservoirs and other environments. The extraction of helium resources is difficult and inefficient. Summary of the invention

[0003] The main technical problem solved by the present application is to provide a crude helium extraction device, which uses helium-containing nitrogen-rich gas as raw material to extract crude helium, has a high helium extraction rate, high crude helium purity, low energy consumption, and can also produce liquid nitrogen products as a by-product when needed.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a crude helium extraction device, comprising: a dehydrogenation unit, the inlet of which is fed with raw gas, and the raw gas is dehydrogenated, and the raw gas components include helium, nitrogen, hydrogen, hydrocarbons and oxygen; a first heat exchanger, which is connected to the dehydrogenation unit, and after receiving the primary gas discharged from the dehydrogenation unit, the primary gas is cooled, and the primary gas components include helium, nitrogen, trace hydrogen, hydrocarbons and oxygen; a first distillation component, which is connected to the first heat exchanger, After receiving the primary gas discharged from the first heat exchanger, the primary gas is distilled; a second distillation component is connected to the first distillation component, and after receiving the secondary gas discharged from the first distillation component, the secondary gas is distilled, and the secondary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons and trace oxygen; an outlet channel is connected to the second distillation component, and is used to discharge the tertiary gas discharged from the second distillation component, and the tertiary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons and trace oxygen.

[0005] Wherein, the first distillation component includes: a first evaporator, which is connected to the first heat exchanger, and after receiving the first-level gas discharged from the first heat exchanger, the first-level gas is cooled; a first cooling channel, which is connected to the first evaporator, and after receiving the first-level gas discharged from the first evaporator, the first-level gas is cooled; a first distillation tower, which is connected to the first cooling channel, and after receiving the first-level gas discharged from the first cooling channel, the first-level gas is distilled; a first condenser, which is connected to the first distillation tower, and after receiving the second-level gas discharged from the first distillation tower, the second-level gas is condensed.

[0006] Wherein, the second distillation component includes: a second evaporator, receiving the secondary gas discharged from the first distillation component, and cooling the secondary gas; a second distillation tower, connected with the first condenser and the second evaporator, receiving the secondary gas discharged from the first condenser and the secondary gas discharged from the second evaporator, and distilling the secondary gas; a second condenser, connected with the second distillation tower, receiving the tertiary gas discharged from the second distillation tower, and condensing the tertiary gas.

[0007] The crude helium extraction device further includes a second expander, which includes a second expansion end and a second boosting end, the inlet of the second boosting end is connected to the second distillation tower, the outlet of the second boosting end is connected to the inlet of the second expansion end, the outlet of the second expansion end is connected to the first heat exchanger, and the second expansion end is used to provide cooling for the first heat exchanger.

[0008] Wherein, the second distillation component includes: a second evaporator, receiving the nitrogen discharged from the first expander component and absorbing the heat of the nitrogen; a second distillation tower, connected to the first condenser, and after receiving the secondary gas discharged from the first condenser, distilling the secondary gas; a second condenser, connected to the second distillation tower, and after receiving the tertiary gas discharged from the second distillation tower, condensing the tertiary gas.

[0009] Wherein, the first expander assembly includes a first expander and a first nitrogen compressor, the first expander includes a first expansion end and a first boosting end, the outlet of the first expansion end is connected to the inlet of the first nitrogen compressor, the outlet of the first nitrogen compressor is connected to the inlet of the first expansion end and to the inlet of the first boosting end, the outlet of the first boosting end is connected to the inlet of the second evaporator, and the first expander assembly is used to provide cooling for the first heat exchanger and provide a heat source for the second evaporator.

[0010] Wherein, the crude helium extraction device further includes: a third liquid outlet channel, which is connected to the second distillation tower and is used to transport liquid nitrogen discharged from the second distillation tower.

[0011] The crude helium extraction device further includes: a second liquid outlet channel connected to the second evaporator for conveying liquid nitrogen discharged from the second evaporator, and the second liquid outlet channel connected to the cooling inlet of the second condenser for providing cooling capacity for the second condenser.

[0012] Wherein, the crude helium extraction device further includes: a first liquid outlet channel, which is connected to the first evaporator and is used to transport the hydrocarbon liquid discharged from the first evaporator.

[0013] The crude helium extraction device further includes: a circulating nitrogen compressor, an inlet of which is connected to the top outlet of the first condenser, an outlet of which is connected to a refrigeration pipeline connected to the first heat exchanger, the refrigeration pipeline is connected to the inlet of the first throttle valve, the outlet of the first throttle valve is connected to the cooling inlet of the first condenser, and the circulating nitrogen compressor and the first heat exchanger are used to provide cooling for the first condenser.

[0014] The beneficial effects of the present application are as follows: Different from the prior art, the crude helium extraction device of the present application extracts crude helium from raw gas. First, the dehydrogenation unit removes the hydrogen component in the raw gas, then the first distillation component removes the hydrocarbon component in the primary gas, and the second distillation component removes the oxygen component and most of the nitrogen component in the secondary gas. The device utilizes the different boiling points in the raw gas to remove the hydrocarbon component and the oxygen component, and further reduces the nitrogen component content. The device improves the extraction rate of helium and roughly improves the purity of helium in the helium product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them: Figure 1 It is a structural schematic diagram of an embodiment of a crude helium extraction device of the present application; Figure 2 It is a structural schematic diagram of another embodiment of the crude helium extraction device of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] See also Figure 1 The crude helium extraction device 100 includes a dehydrogenation unit 1 , a first heat exchanger 2 , a first distillation component 3 , a second distillation component 4 and a gas outlet channel 51 .

[0018] The inlet of the dehydrogenation unit 1 is fed with raw gas, and the raw gas is dehydrogenated. The raw gas components include helium, nitrogen, hydrogen, hydrocarbons and oxygen. Specifically, the raw gas can be the tail gas containing helium and nitrogen enriched discharged from the factory, and the factory tail gas is efficiently recycled and utilized. The dehydrogenation unit 1 removes hydrogen from the raw gas, and discharges a primary gas at the outlet of the dehydrogenation unit 1. The primary gas components include helium, nitrogen, trace hydrogen, hydrocarbons and oxygen.

[0019] The first heat exchanger 2 is connected to the dehydrogenation unit 1, and after receiving the primary gas discharged from the dehydrogenation unit 1, the primary gas is cooled. Specifically, the hot end inlet of the first heat exchanger 2 is connected to the dehydrogenation unit 1, and the primary gas is discharged from the cold end outlet of the first heat exchanger 2 after passing through the first heat exchanger 2, and the first heat exchanger 2 cools the primary gas.

[0020] The first distillation component 3 is connected to the first heat exchanger 2, and after receiving the primary gas discharged from the first heat exchanger 2, the primary gas is distilled. Specifically, the cold end outlet of the first heat exchanger 2 is connected to the first distillation component 3, and the first distillation component 3 performs distillation on the primary gas after cooling to remove hydrocarbon components in the primary gas. The first distillation component 3 distills the primary gas by liquefying the hydrocarbon gas into hydrocarbon liquid. After distillation, the first distillation component 3 discharges secondary gas, and the secondary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons and oxygen.

[0021] The second distillation component 4 is in communication with the first distillation component 3, and performs distillation treatment on the secondary gas after receiving the secondary gas discharged from the first distillation component 3. Specifically, the second distillation component 4 performs distillation treatment on the secondary gas to remove the oxygen component in the secondary gas and reduce the nitrogen component content in the secondary gas.

[0022] The gas outlet channel 51 is connected to the second distillation component 4, and is used to discharge the tertiary gas discharged from the second distillation component 4. The tertiary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons, and trace oxygen. Specifically, the nitrogen content in the tertiary gas is further reduced compared to the nitrogen content in the secondary gas, and the tertiary gas is obtained at the outlet of the gas outlet channel 51, that is, the crude helium is discharged from the outlet of the gas outlet channel 51.

[0023] The crude helium extraction device 100 of the present application extracts crude helium from raw gas. First, the dehydrogenation unit 1 removes the hydrogen component in the raw gas. Then, the first distillation component 3 removes the hydrocarbon component in the primary gas, and the second distillation component 4 removes the oxygen component in the secondary gas. The hydrocarbon and oxygen components are removed by the difference in boiling points of the components in the raw gas, and the nitrogen component content is further reduced. The device improves the extraction rate of helium and improves the purity of helium in the crude helium product.

[0024] In one embodiment, the first distillation component 3 includes a first evaporator 31 , a first cooling channel 32 , a first distillation tower 33 and a first condenser 34 .

[0025] The first evaporator 31 is connected to the first heat exchanger 2, and after receiving the primary gas discharged from the first heat exchanger 2, the primary gas is cooled. Specifically, the primary gas is passed into the first evaporator 31, and the primary gas is used as a heat source for the first evaporator 31, that is, the liquid in the first evaporator 31 can absorb the heat in the primary gas, so that after the first heat exchanger 2 cools the primary gas, the first evaporator 31 further reduces the temperature of the primary gas.

[0026] The first cooling channel 32 is connected to the first evaporator 31, and after receiving the primary gas discharged from the first evaporator 31, the primary gas is further cooled. Specifically, the first cooling channel 32 includes a pipeline connecting the first evaporator 31 with the cooling end inlet of the first heat exchanger 2, and a pipeline connecting the cold end outlet of the first heat exchanger 2 with the first distillation tower 33. Since the first cooling channel 32 passes through the first heat exchanger 2, the first heat exchanger 2 performs deep cooling on the primary gas.

[0027] The first distillation tower 33 is in communication with the first cooling channel 32, and performs distillation treatment on the primary gas after receiving the primary gas discharged from the first cooling channel 32. Specifically, since the boiling point of hydrocarbon components is higher than that of other components, the first distillation tower 33 liquefies the hydrocarbon gas into hydrocarbon liquid, and the hydrocarbon gas generally includes methane. The first distillation tower 33 removes methane and other hydrocarbon components, so that the first distillation tower 33 realizes distillation treatment of the primary gas.

[0028] Furthermore, in one embodiment, the crude helium extraction device 100 further includes a first liquid outlet channel 52, which is in communication with the first evaporator 31 and is used to transport the hydrocarbon liquid discharged from the first evaporator 31. Specifically, the first liquid outlet channel 52 discharges the hydrocarbon liquid and performs throttling treatment on the hydrocarbon liquid, and then discharges the hydrocarbon gas at the outlet of the first liquid outlet channel 52, so as to facilitate combustion treatment of the hydrocarbon gas.

[0029] The first condenser 34 is connected to the first distillation tower 33, and condenses the secondary gas after receiving the secondary gas discharged from the first distillation tower 33. Specifically, the first condenser 34 condenses the secondary gas to purify the secondary gas.

[0030] Continue reading Figure 1 In one embodiment, the second distillation component 4 includes a second evaporator 41 , a second distillation tower 42 and a second condenser 43 .

[0031] The second evaporator 41 receives the secondary gas discharged from the first distillation component 3 and cools the secondary gas. The second distillation tower 42 is connected to the first condenser 34 and the second evaporator 41. After receiving the secondary gas discharged from the first condenser 34 and the secondary gas discharged from the second evaporator 41, the secondary gas is distilled. The second condenser 43 is connected to the second distillation tower 42. After receiving the tertiary gas discharged from the second distillation tower 42, the tertiary gas is condensed.

[0032] Specifically, the first condenser 34 in the first distillation component 3 discharges uncondensed gas and condensed liquid, wherein the condensed liquid includes at least a liquefied portion of the secondary gas, and all the gas discharged from the first condenser 34 is sent to the second evaporator 41, and after being cooled by the second evaporator 41, it is sent to the second distillation tower 42. Part of the liquid discharged from the first condenser 34 is sent to the second distillation tower 42 after throttling. In this process, the gas discharged from the first condenser 34 is used as a heat source for the second evaporator 41, and the second distillation tower 42 distills the secondary gas to remove the oxygen component in the secondary gas and further reduce the content of the nitrogen component in the secondary gas. After distillation, the second distillation tower 42 discharges the tertiary gas.

[0033] Furthermore, in this embodiment, the pressure of the second distillation tower 42 is lower than the pressure of the first distillation tower 33, thereby reducing the rotation configuration and lowering the energy consumption.

[0034] See also Figure 2In another embodiment, different from the previous embodiment, in this embodiment, the nitrogen discharged from the first expander assembly 6 is used as a heat source for the second evaporator 41. The second evaporator 41 receives the nitrogen discharged from the first expander assembly 6 and absorbs the heat of the nitrogen. The second distillation tower 42 is connected to the first condenser 34. After receiving the secondary gas discharged from the first condenser 34, the secondary gas is distilled. The second condenser 43 is connected to the second distillation tower 42. After receiving the tertiary gas discharged from the second distillation tower 42, the tertiary gas is condensed.

[0035] Specifically, the secondary gas discharged from the first condenser 34 is sent to the second distillation tower 42, the second distillation tower 42 distills the secondary gas to remove the oxygen component in the secondary gas, the first expander assembly 6 outputs nitrogen to the second evaporator 41, the second evaporator 41 absorbs the heat of the nitrogen and outputs liquid nitrogen, and at the same time, the bottom of the second distillation tower 42 is connected to the first expander assembly 6, and the nitrogen at the bottom of the second distillation tower 42 is extracted and pressurized by the first expander assembly 6 and then output to the second evaporator 41.

[0036] Further, in this embodiment, the pressures of the first distillation tower 33 and the second distillation tower 42 are the same. Figure 1 The implementation method can further improve the purity of the crude helium in the tertiary gas.

[0037] Continue reading Figure 1 In one embodiment, the crude helium extraction device 100 further includes a second expander 7, the second expander 7 includes a second expansion end 71 and a second boosting end 72, the inlet of the second boosting end 72 is connected to the second distillation tower 42, the outlet of the second boosting end 72 is connected to the inlet of the second expansion end 71, the outlet of the second expansion end 71 is connected to the first heat exchanger 2, and the second expansion end 71 is used to provide cooling for the first heat exchanger 2.

[0038] Specifically, the nitrogen discharged from the second distillation tower 42 is sent to the second boosting end 72 of the second expander 7, the second boosting end 72 pressurizes the nitrogen and then sends it to the first heat exchanger 2, the first heat exchanger 2 cools the nitrogen and then sends it to the second expansion end 71 of the second expander 7, the second expansion end 71 expands the nitrogen, and the temperature of the nitrogen is reduced during the process, the second expansion end 71 sends the nitrogen to the first heat exchanger 2, so that the cold energy of the nitrogen is sent to the first heat exchanger 2.

[0039] Furthermore, the outlet of the second supercharging end 72 is connected to the cooler 91 for cooling the gas discharged from the second supercharging end 72 .

[0040] Continue reading Figure 2In one embodiment, the first expander assembly 6 includes a first expander 61 and a first nitrogen compressor 62, the first expander 61 includes a first expansion end 611 and a first boosting end 612, the outlet of the first expansion end 611 is connected to the inlet of the first nitrogen compressor 62, the outlet of the first nitrogen compressor 62 is connected to the inlet of the first expansion end 611, and is connected to the inlet of the first boosting end 612, the outlet of the first boosting end 612 is connected to the inlet of the second evaporator 41, and the first expander assembly 6 is used to provide cooling for the first heat exchanger 2 and provide a heat source for the second evaporator 41.

[0041] Specifically, after the first nitrogen compressor 62 receives the nitrogen discharged from the second distillation component 4 and the nitrogen discharged from the first expansion end 611, the first nitrogen compressor 62 compresses the nitrogen, and a part of the compressed nitrogen is sent to the first boosting end 612 of the first expansion machine 61. The first boosting end 612 boosts the nitrogen and then sends it to the first heat exchanger 2. The first heat exchanger 2 cools the nitrogen and then sends it to the second evaporator 41. In this process, the cold energy of the nitrogen discharged from the first expansion end 611 is sent to the first heat exchanger 2.

[0042] Furthermore, the outlet of the first supercharging end 612 is connected to the cooler 91 for cooling the gas discharged from the first supercharging end 612 .

[0043] Combination Figure 1 and Figure 2 In one embodiment, the crude helium extraction device 100 further includes a third liquid outlet channel 54, which is connected to the second distillation tower 42 and is used to transport liquid nitrogen discharged from the second distillation tower 42, which can be used as a by-product of the device.

[0044] Specifically, the liquid nitrogen discharged from the second distillation tower 42 is cooled by the second heat exchanger 92 and then throttled by the throttle valve to obtain liquid nitrogen at the outlet of the third liquid outlet channel 54 as a by-product of the device.

[0045] Combination Figure 1 and Figure 2 In one embodiment, the crude helium extraction device 100 further includes a second liquid outlet channel 53 , which is connected to the second evaporator 41 , and is connected to the cooling inlet of the second condenser 43 , for providing cooling capacity for the second condenser 43 .

[0046] Specifically, the second liquid outlet channel 53 delivers the discharged liquid nitrogen to the cooling inlet of the second condenser 43. The second liquid outlet channel 53 first passes through the second heat exchanger 92 to cool the liquid nitrogen, and then passes through the throttle valve to throttle the liquid nitrogen before delivering it to the cooling inlet of the second condenser 43, thereby realizing the recycling of nitrogen.

[0047] In another embodiment, when the cooling capacity of the second condenser 43 is insufficient, the cooling inlet is connected to the liquid nitrogen inflow pipe 55 so that external liquid nitrogen is delivered to the second condenser 43 .

[0048] See also Figure 1 and Figure 2 In one embodiment, the crude helium extraction device 100 further includes a circulating nitrogen compressor 8, the inlet of the circulating nitrogen compressor 8 is connected to the top outlet of the first condenser 34, the outlet is connected to a refrigeration pipeline 93 connected to the first heat exchanger 2, the refrigeration pipeline 93 is connected to the inlet of the first throttle valve 94, the outlet of the first throttle valve 94 is connected to the cooling inlet of the first condenser 34, and the circulating nitrogen compressor 8 and the first heat exchanger 2 are used to provide cooling for the first condenser 34.

[0049] Specifically, the nitrogen discharged from the top outlet of the first condenser 34 is sent to the first heat exchanger 2 for temperature treatment, and then the circulating nitrogen compressor 8 compresses the nitrogen and sends it to the refrigeration pipe 93 of the first heat exchanger 2. The first heat exchanger 2 cools and liquefies the nitrogen and then sends it to the first throttle valve 94. After throttling and reducing the pressure by the first throttle valve 94, it is sent to the cooling inlet of the first condenser 34.

[0050] In order to better understand the solution of this application, Figure 1 and Figure 2 A detailed introduction to the scheme of this application: exist Figure 1 and Figure 2 In the scheme, the raw gas components include helium, nitrogen, hydrogen, hydrocarbons and oxygen. After the raw gas is treated by the dehydrogenation unit 1, the hydrogen component in the raw gas is removed and the primary gas is discharged. The primary gas components include helium, nitrogen, trace hydrogen, hydrocarbons and oxygen. Then, the first heat exchanger 2 cools the primary gas and sends it to the first evaporator 31. The first evaporator 31 further cools the primary gas and sends it to the first heat exchanger 2 for deep cooling. After the primary gas is cooled three times, the first distillation tower 33 distills the primary gas to remove the hydrocarbon components in the primary gas. The first distillation tower 33 distills the primary gas by liquefying the hydrocarbon gas to discharge the secondary gas. The secondary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons and oxygen. The first condenser 34 condenses the secondary gas and sends it to the second distillation component 4.

[0051] exist Figure 1In the scheme, part of the gas received by the second distillation tower 42 comes from the secondary gas after the gas discharged from the first condenser 34 is cooled by the first evaporator 31, and the other part comes from the partially liquefied secondary gas discharged from the second condenser 43. The second distillation tower 42 distills the secondary gas to remove the oxygen component in the secondary gas and discharges the tertiary gas. The tertiary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons and trace oxygen.

[0052] exist Figure 2 In the scheme, the second distillation tower 42 receives the secondary gas discharged from the first condenser 34 and performs distillation treatment on the secondary gas. Figure 2 The plan and Figure 1 The difference between the schemes is that the heat source of the second evaporator 41 is different. Figure 1 The heat source of the second evaporator 41 comes from the gas discharged from the first condenser 34. Figure 2 The heat source of the second evaporator 41 comes from the nitrogen sent in by the first expander assembly 6.

[0053] The second condenser 43 condenses the tertiary gas to further reduce the nitrogen content in the tertiary gas. The second condenser 43 is connected to the gas outlet channel 51 to discharge the crude helium through the gas outlet channel 51.

[0054] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A crude helium extraction device, characterized in that: include: A dehydrogenation unit, wherein a raw material gas is introduced into the inlet and the raw material gas is dehydrogenated, wherein the raw material gas components include helium, nitrogen, hydrogen, hydrocarbons and oxygen; A first heat exchanger is connected to the dehydrogenation unit, and after receiving the primary gas discharged from the dehydrogenation unit, performs a temperature reduction treatment on the primary gas, wherein the primary gas components include helium, nitrogen, trace hydrogen, hydrocarbons and oxygen; a first distillation component, connected to the first heat exchanger, and performing distillation treatment on the first gas after receiving the first gas discharged from the first heat exchanger; A second distillation component is connected to the first distillation component, and after receiving the secondary gas discharged by the first distillation component, performs distillation treatment on the secondary gas, wherein the secondary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons and oxygen; The gas outlet channel is connected to the second distillation component and is used to discharge the tertiary gas discharged from the second distillation component. The tertiary gas components include helium, nitrogen, trace hydrogen, trace hydrocarbons and trace oxygen.

2. The crude helium extraction device according to claim 1, characterized in that: The first distillation component comprises: a first evaporator, connected to the first heat exchanger, and cooling the first gas after receiving the first gas discharged from the first heat exchanger; a first cooling channel, connected to the first evaporator, and cooling the first-level gas after receiving the first-level gas discharged from the first evaporator; a first distillation tower, connected to the first cooling channel, and performing distillation treatment on the first gas after receiving the first gas discharged from the first cooling channel; The first condenser is connected to the first distillation tower, and after receiving the secondary gas discharged from the first distillation tower, performs condensation processing on the secondary gas.

3. The crude helium extraction device according to claim 2, characterized in that: The second distillation component comprises: a second evaporator, receiving the secondary gas discharged from the first distillation component and performing a temperature reduction process on the secondary gas; a second distillation tower, connected to the first condenser and the second evaporator, for distilling the secondary gas after receiving the secondary gas discharged from the first condenser and the secondary gas discharged from the second evaporator; The second condenser is connected to the second distillation tower, and after receiving the tertiary gas discharged from the second distillation tower, condenses the tertiary gas.

4. The crude helium extraction device according to claim 3, characterized in that: The crude helium extraction device also includes a second expander, which includes a second expansion end and a second boosting end, the inlet of the second boosting end is connected to the second distillation tower, the outlet of the second boosting end is connected to the inlet of the second expansion end, the outlet of the second expansion end is connected to the first heat exchanger, and the second expansion end is used to provide cold capacity for the first heat exchanger.

5. The crude helium extraction device according to claim 2, characterized in that: The second distillation component comprises: a second evaporator, receiving nitrogen exhausted by the first expander assembly and absorbing heat of the nitrogen; a second distillation tower, connected to the first condenser, for distilling the secondary gas after receiving the secondary gas discharged from the first condenser; The second condenser is connected to the second distillation tower, and after receiving the tertiary gas discharged from the second distillation tower, condenses the tertiary gas.

6. The crude helium extraction device according to claim 5, characterized in that: The first expander assembly includes a first expander and a first nitrogen compressor, the first expander includes a first expansion end and a first boosting end, the outlet of the first expansion end is connected to the inlet of the first nitrogen compressor, the outlet of the first nitrogen compressor is connected to the inlet of the first expansion end and to the inlet of the first boosting end, the outlet of the first boosting end is connected to the inlet of the second evaporator, and the first expander assembly is used to provide cooling for the first heat exchanger and provide a heat source for the second evaporator.

7. The crude helium extraction device according to claim 3 or 4, characterized in that: The crude helium extraction device also includes: The second liquid outlet channel is connected to the second evaporator and is used to transport the liquid nitrogen discharged from the second evaporator. The second liquid outlet channel is connected to the cooling inlet of the second condenser and is used to provide cooling capacity for the second condenser.

8. The crude helium extraction device according to claim 3 or 4, characterized in that: The crude helium extraction device also includes: The third liquid outlet channel is communicated with the second distillation tower and is used for conveying the liquid nitrogen discharged from the second distillation tower.

9. The crude helium extraction device according to claim 2, characterized in that: The crude helium extraction device also includes: The first liquid outlet channel is communicated with the first evaporator and is used for conveying the hydrocarbon liquid discharged from the first evaporator.

10. The crude helium extraction device according to claim 2, characterized in that: The crude helium extraction device also includes: A circulating nitrogen compressor, the inlet of which is connected to the top outlet of the first condenser, the outlet of which is connected to a refrigeration pipeline connected to the first heat exchanger, the refrigeration pipeline is connected to the inlet of the first throttle valve, the outlet of the first throttle valve is connected to the cooling inlet of the first condenser, and the circulating nitrogen compressor and the first heat exchanger are used to provide cooling for the first condenser.

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