Natural gas helium extraction device

Abstract

The utility model relates to the technical field of natural gas helium extraction, and discloses a catalytic dehydrogenation tank of a natural gas helium extraction device. The drying dehydration tank is connected with the catalytic dehydrogenation tank through a cooling pipe; the membrane separation tank is connected with the drying dehydration tank and is used for separating natural gas from helium; a heat exchange pipe is coiled in the low-temperature adsorption tank, low-temperature natural gas is introduced into one end of the heat exchange pipe, and the other end of the heat exchange pipe is connected to the catalytic dehydrogenation tank. The technical effects can be realized as follows: heat exchange can be performed in the low-temperature adsorption tank through low-temperature natural gas, so that energy consumption for refrigeration of the low-temperature adsorption tank can be reduced, the natural gas can generate a large amount of heat to heat the natural gas after entering the catalytic dehydrogenation tank, and the heated natural gas can be cooled through the heat exchanger; the temperature of natural gas can be prevented from being too high, the natural gas can be heated through the heat exchanger, and the temperature of the natural gas entering the catalytic dehydrogenation tank can be prevented from being too low.

Description

Technical Field

[0001] The present application relates to the technical field of helium extraction from natural gas, for example, to a natural gas helium extraction device. Background Art

[0002] At present, helium is a resource that plays an irreplaceable role in high-end medical treatment, electronic manufacturing, and large scientific facilities. When natural gas is mined, some helium is mixed in it. At this time, it is necessary to separate natural gas from helium to extract helium.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] When using traditional helium extraction equipment, a large amount of energy is required for refrigeration to achieve low-temperature adsorption of helium to purify the helium. In addition, since the temperature of the natural gas introduced into the catalytic dehydrogenation tank is relatively low, it is not conducive to the catalytic dehydrogenation reaction. Utility Model Content

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The disclosed embodiment provides a natural gas helium extraction device to solve the problem of excessive energy consumption when refrigeration is required during low-temperature adsorption.

[0007] In some embodiments, the natural gas helium extraction device includes: a catalytic dehydrogenation tank, which is connected to an oxygen pipeline; a drying and dehydration tank, which is connected to the catalytic dehydrogenation tank through a cooling pipe; a membrane separation tank, which is connected to the drying and dehydration tank and is used to separate natural gas and helium; a normal temperature pressure swing adsorption tank, which is connected to the membrane separation tank and is used to separate helium from impurities; a low temperature adsorption tank, which is connected to the normal temperature pressure swing adsorption tank and is used to purify helium; a heat exchange tube is coiled inside the low temperature adsorption tank, one end of which is connected to low temperature natural gas, and the other end of the heat exchange tube is connected to the catalytic dehydrogenation tank.

[0008] In some embodiments, a heat exchanger is provided on the cooling tube, the heat exchange tube is coiled inside the heat exchanger, and the cooling tube is connected to the heat exchanger for heat exchange.

[0009] In some embodiments, a drain pipe is connected to the drying and dehydration tank.

[0010] In some embodiments, a natural gas exhaust pipe is connected to one side of the membrane separation tank.

[0011] In some embodiments, the atmospheric pressure temperature swing adsorption tank is connected to an impurity discharge pipe.

[0012] In some embodiments, a waste removal pipe is connected to the side of the low-temperature adsorption tank.

[0013] The natural gas helium extraction device provided in the embodiments of the present disclosure can achieve the following technical effects:

[0014] Low-temperature natural gas can be used to exchange heat in the low-temperature adsorption tank, which can reduce the energy consumption of the low-temperature adsorption tank for refrigeration. After the natural gas enters the catalytic dehydrogenation tank, a large amount of heat will be generated to heat the natural gas. The heated natural gas can be cooled by the heat exchanger to prevent the natural gas temperature from being too high. The natural gas can also be heated by the heat exchanger to prevent the temperature from being too low when entering the catalytic dehydrogenation tank.

[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0017] Figure 1 It is a schematic diagram of the structure of a natural gas helium extraction device provided in an embodiment of the present disclosure;

[0018] Figure 2 It is a schematic diagram of the structural marking of the natural gas helium extraction device provided in the embodiment of the present disclosure.

[0019] Reference numerals:

[0020] 100, catalytic dehydrogenation tank; 101, oxygen pipeline; 200, drying and dehydration tank; 201, cooling pipe; 202, drainage pipe; 300, membrane separation tank; 301, natural gas exhaust pipe; 400, normal temperature pressure swing adsorption tank; 401, discharge pipe; 500, low temperature adsorption tank; 501, heat exchange pipe; 502, heat exchanger; 503, drainage pipe. DETAILED DESCRIPTION

[0021] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0022] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0023] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0024] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0025] Unless otherwise stated, the term "plurality" means two or more.

[0026] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0027] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0029] Combination Figure 1-2 As shown, the embodiment of the present disclosure provides a natural gas helium extraction device, including: a catalytic dehydrogenation tank 100, the catalytic dehydrogenation tank 100 is connected to an oxygen pipeline 101; a drying and dehydration tank 200, connected to the catalytic dehydrogenation tank 100 through a cooling pipe 201; a membrane separation tank 300, connected to the drying and dehydration tank 200, used to separate natural gas from helium; a normal temperature pressure swing adsorption tank 400, connected to the membrane separation tank 300, used to separate helium from impurities; a low temperature adsorption tank 500, connected to the normal temperature pressure swing adsorption tank 400, used to purify helium; a heat exchange tube 501 is coiled inside the low temperature adsorption tank 500, one end of the heat exchange tube 501 is passed through the low temperature natural gas, and the other end of the heat exchange tube 501 is connected to the catalytic dehydrogenation tank 100.

[0030] By using the natural gas helium extraction device provided by the embodiment of the present disclosure, the natural gas is a low-temperature gas after being mined, which contains hydrogen, helium and other gases. When helium extraction is needed, the hydrogen needs to be removed to prevent the hydrogen and helium from being discharged and separated at the same time during membrane separation. The catalytic dehydrogenation tank 100 can catalyze the hydrogen in the natural gas. By introducing oxygen or air into the catalytic dehydrogenation tank 100, the platinum, palladium and other catalysts in the catalytic dehydrogenation tank 100 can catalyze the hydrogen and oxygen to form water. A large amount of heat will be released during the catalytic dehydrogenation process, and the natural gas and water can be heated to form water vapor. In this way, the natural gas, helium, water vapor and other gases will enter the drying and dehydration tank 200 through the cooling pipe 201. The drying and dehydration tank 200 can dehydrate the water vapor in the mixed gas. The water in the natural gas can be separated by the drying and dehydration tank 200, and the hydrogen in the natural gas is removed by dehydration. The natural gas after the hydrogen is removed enters the membrane separation tank 300. The membrane separation tank 300 can separate natural gas from helium, and the separated natural gas is discharged from the membrane separation tank 300, and the helium and other impurities enter the normal temperature pressure swing adsorption tank 400. The normal temperature pressure swing adsorption tank 400 can adsorb and separate the helium in the mixed helium. The PSA technology operated at room temperature by switching pressurization and decompression can effectively separate high-purity helium from the mixed gas containing helium. The purified helium is introduced into the low-temperature adsorption tank 500, and the low-temperature adsorption tank 500 can purify the helium with high purity. The low-temperature adsorption tank 500 is coiled with a heat exchange tube 501, and the heat exchange tube 501 is passed into the low-temperature natural gas. The low-temperature natural gas exchanges heat with the low-temperature adsorption tank 500 to cool down, so that the natural gas in the heat exchange tube 501 can be heated, so that the temperature in the low-temperature adsorption tank 500 can be reduced. The temperature of the natural gas in the heat exchange tube 501 is increased and passed into the catalytic dehydrogenation tank 100, thereby reducing the temperature of the natural gas entering the catalytic dehydrogenation tank 100.

[0031] Optionally, a heat exchanger 502 is provided on the cooling tube 201 , and the heat exchange tube 501 is coiled inside the heat exchanger 502 , and the cooling tube 201 and the heat exchanger 502 are connected for heat exchange.

[0032] In this way, the heat exchanger 502 is arranged on the cooling tube 201, and the heat exchanger 502 can exchange heat with the cooling tube 201. When the catalytic dehydrogenation tank 100 performs a catalytic dehydrogenation reaction, a large amount of heat is generated, which can heat the natural gas and increase the temperature of the natural gas. The natural gas passing through the cooling tube 201 can be cooled by the heat exchanger 502, which can prevent the temperature entering the drying and dehydration tank 200 from being too high. The heat exchange tube 501 is coiled and arranged in the heat exchanger 502. The heat exchange tube 501 can exchange heat in the heat exchanger 502. The low-temperature natural gas in the heat exchange tube 501 can cool the cooling tube 201 passing through the heat exchanger 502, and then the natural gas passing through the cooling tube 201 can be cooled.

[0033] Optionally, a drain pipe 202 is connected to the drying and dehydration tank 200 .

[0034] In this way, the drain pipe 202 on the drying and dehydrating tank 200 can drain the water in the drying and dehydrating tank 200 .

[0035] Optionally, a natural gas exhaust pipe 301 is connected to one side of the membrane separation tank 300 .

[0036] In this way, the membrane separation tank 300 can separate natural gas from helium, and the natural gas exhaust pipe 301 on the membrane separation tank 300 can discharge the separated natural gas.

[0037] Optionally, the atmospheric pressure temperature swing adsorption tank is connected with an impurity discharge pipe 401. In this way, the impurity discharge pipe 401 on the atmospheric pressure temperature swing adsorption tank can discharge the separated impurities.

[0038] Optionally, a waste removal pipe 503 is connected to the side of the low-temperature adsorption tank 500 .

[0039] In this way, the impurity discharge pipe 503 on the side of the low-temperature adsorption tank 500 can discharge the impurities after the helium is purified.

[0040] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A natural gas helium extraction device, characterized in that: include: A catalytic dehydrogenation tank (100), wherein the catalytic dehydrogenation tank (100) is connected to an oxygen pipeline (101); A drying and dehydration tank (200) is connected to the catalytic dehydrogenation tank (100) via a cooling pipe (201); A membrane separation tank (300) is connected to the drying and dehydration tank (200) and is used to separate natural gas from helium; A normal temperature pressure swing adsorption tank (400) is connected to the membrane separation tank (300) and is used to separate helium from impurities; A low-temperature adsorption tank (500) connected to the normal-temperature pressure swing adsorption tank (400) for purifying helium; A heat exchange tube (501) is coiled inside the low-temperature adsorption tank (500), low-temperature natural gas is introduced into one end of the heat exchange tube (501), and the other end of the heat exchange tube (501) is connected to the catalytic dehydrogenation tank (100).

2. The natural gas helium extraction device according to claim 1, characterized in that: A heat exchanger (502) is provided on the cooling tube (201), the heat exchange tube (501) is coiled and arranged inside the heat exchanger (502), and the cooling tube (201) and the heat exchanger (502) are connected for heat exchange.

3. The natural gas helium extraction device according to claim 1, characterized in that: The drying and dehydration tank (200) is connected to a drainage pipe (202).

4. The natural gas helium extraction device according to claim 1, characterized in that: One side of the membrane separation tank (300) is connected to a natural gas exhaust pipe (301).

5. The natural gas helium extraction device according to claim 1, characterized in that: The normal temperature pressure swing adsorption tank (400) is connected to an impurity discharge pipe (401).

6. The natural gas helium extraction device according to claim 1, characterized in that: The low-temperature adsorption tank (500) is connected to a side thereof with a waste removal pipe (503).

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