Helium purification tank and helium purification device

Abstract

The utility model discloses a helium purification tank, which relates to the technical field of helium purification and comprises a tank body, a barrel body and a gas guide pipe, a gas inlet penetrates through the bottom of the tank body, a first gas outlet penetrates through the top of the tank body, a second gas outlet penetrates through one end, close to the gas inlet, of the side wall of the tank body, the first gas outlet is used for discharging impure gas, and the second gas outlet is used for discharging product helium; the barrel body is arranged in the tank body, and a first adsorption cavity is formed between the outer wall of the barrel body and the inner wall of the tank body; a cavity of the barrel body is defined as a second adsorption cavity; the bottom end of the barrel body is communicated with one end of the air guide pipe, and the other end of the air guide pipe is communicated with the second air outlet. The utility model further relates to a purification device. The helium purification tank provided by the utility model can replace the traditional pressure swing adsorption helium extraction process in the form of two sections or a main tower and an auxiliary tower, and has the advantages of high helium recovery rate and purity, convenience in use, small occupied space, low cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of helium purification, in particular to a helium purification tank and a purification device. Background Art

[0002] At present, the main research direction is to use pressure swing adsorption to achieve helium extraction. Considering the scarcity and strategic importance of helium, the recovery rate and purity of helium extraction are crucial. In order to ensure the recovery rate and purity of helium extraction, it is usually necessary to set up two or more stages of pressure swing adsorption, and set up forward and reverse steps. For example, the first stage is set up with a forward step to improve the helium recovery rate; the second stage is set up with a reverse step to improve the purity of helium. The prior art discloses a method for low-temperature helium extraction from helium-containing coalbed gas concentration, which uses a multi-stage pressure swing adsorption device, but this device has the defects of complex process, multiple equipment, large space occupation, and high cost. Utility Model Content

[0003] The utility model aims to provide a helium purification tank and a purification device, which are used to solve the problems of complicated process, multiple equipments, large occupied space and high cost of helium purification device in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a helium purification tank, comprising a tank body, a barrel body, and an air guide pipe;

[0006] An air inlet is provided through the bottom of the tank body, a first air outlet is provided through the top of the tank body, and a second air outlet is provided through one end of the side wall of the tank body close to the air inlet. The first air outlet is used to discharge impure gas, and the second air outlet is used to discharge helium.

[0007] The barrel body is arranged inside the tank body, and a first adsorption cavity is formed between the outer wall of the barrel body and the inner wall of the tank body; the cavity of the barrel body is defined as a second adsorption cavity;

[0008] The bottom end of the barrel body is connected to one end of the air guide pipe, and the other end of the air guide pipe is connected to the second air outlet.

[0009] As a possible implementation manner, the airway tube is a rigid airway tube.

[0010] As a possible implementation manner, both the first adsorption cavity and the second adsorption cavity are filled with adsorbent.

[0011] As a possible implementation manner, the open end of the barrel body is coaxial and collinear with the first air outlet.

[0012] As a possible implementation method, the helium purification tank has an adsorption state and an exhaust gas recovery state; in the adsorption state, the first gas outlet is closed, the gas inlet and the second gas outlet are opened, the original gas enters from the gas inlet, is purified into helium through the first adsorption cavity and the second adsorption cavity, and then is discharged through the second gas outlet;

[0013] When in the waste gas recovery state, the air inlet and the second air outlet are closed, the first air outlet is opened, and the impure gas in the helium purification tank is discharged through the first air outlet under the negative pressure of the negative pressure device.

[0014] As a possible implementation, valves are provided on the air inlet, the first air outlet, and the second air outlet for controlling the helium purification tank to be in an adsorption state or an exhaust gas recovery state.

[0015] In a second aspect, the utility model provides a purification device, comprising N helium purification tanks, an air inlet pipeline, a first air outlet pipeline, and a second air outlet pipeline, the helium purification tank being the helium purification tank provided in the first aspect of the utility model, and N≥2;

[0016] The air inlet pipeline is connected to the air inlets of the N helium purification tanks, the first air outlet pipeline is connected to the first air outlets of the N helium purification tanks, and the second air outlet pipeline is connected to the second air outlets of the N helium purification tanks;

[0017] The first gas outlet pipeline is used to discharge impure gas, and the second gas outlet pipeline is used to discharge helium.

[0018] As a possible implementation manner, the first gas outlet pipeline is connected to a gas recovery device.

[0019] As a possible implementation, valves corresponding to each helium purification tank are provided on the air inlet pipeline, the first air outlet pipeline, and the second air outlet pipeline, for controlling one or more helium purification tanks to be in an adsorption state or an exhaust gas recovery state.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The helium purification tank provided by the present invention is provided with an impure gas discharge port, which can realize the recovery of impure gas in the tank body. The recovered impure gas can be purified again by the helium purification tank, and the helium recovery rate is high.

[0022] 2. The helium purification tank provided by the utility model adopts a jacketed structural design, in which a barrel body is arranged inside the tank body, and the first forward adsorption cavity and the second reverse adsorption cavity are integrated together. The device is small in size, easy to operate, and has a high helium purification degree.

[0023] 3. The helium purification tank provided by the utility model can purify helium and recover impure gas without setting up a multi-stage adsorption device. The purification process is simple and easy to operate. Compared with a multi-stage adsorption device, the equipment cost is greatly reduced.

[0024] 4. The purification device provided by the utility model connects multiple helium purification tanks, and one or more helium purification tanks can be opened or closed according to demand. It is flexible to use and has high helium purification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0026] Figure 1 It is a schematic diagram of the structure of the helium purification tank in the embodiment of the utility model and the gas flow direction when it is in the adsorption state;

[0027] Figure 2 It is a schematic diagram of gas flow when the helium purification tank is in the waste gas recovery state in the embodiment of the utility model;

[0028] Figure 3 It is a schematic diagram of the structure of the purification device in the embodiment of the utility model.

[0029] Reference numerals

[0030] 1-helium purification tank; 10-tank body, 11-barrel body, 12-air guide pipe; 100-air inlet, 101-first air outlet, 102-second air outlet;

[0031] 2-inlet pipeline, 3-first outlet pipeline, 4-second outlet pipeline. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] In the prior art, in order to ensure the recovery rate and purity of helium extraction, it is usually necessary to set up two or more stages of pressure swing adsorption. The use of a multi-stage pressure swing adsorption device not only has a complicated process, but also has defects such as a large number of equipment, a large space occupied, and a high cost.

[0038] In order to solve the above problems, the utility model provides a helium purification tank and a purification device, which have high helium recovery rate and purity and occupy a small space.

[0039] In the first aspect, the utility model provides a helium purification tank, see Figure 1 , including a tank body 10, a barrel body 11, and an air guide pipe 12;

[0040] An air inlet 100 is provided at the bottom of the tank body 10, a first air outlet 101 is provided at the top of the tank body 10, and a second air outlet 102 is provided at one end of the side wall of the tank body 1 close to the air inlet 100. The first air outlet 101 is used to discharge impure gas, and the second air outlet 102 is used to discharge helium.

[0041] The helium purification tank provided by the utility model has a first gas outlet for discharging impure gas, which can realize the recycling of impure gas. On the one hand, it can avoid excessive impure gas in the helium purification tank, which affects the purity of the helium; on the other hand, the recovered impure gas can be purified again by using the helium purification tank, and the helium recovery rate is relatively high.

[0042] See also Figure 1 The barrel body 11 is arranged inside the tank body 10, and a first adsorption cavity is formed between the outer wall of the barrel body 11 and the inner wall of the tank body 10; the cavity possessed by the barrel body 11 is defined as a second adsorption cavity; the bottom end of the barrel body 11 is connected to one end of the air duct 12, and the other end of the air duct 12 is connected to the second air outlet 102.

[0043] See also Figure 1 The gas enters the first adsorption cavity from the air inlet 100, and after adsorption treatment, enters the second adsorption cavity under the dual effects of the air inlet pressure and the upper wall of the tank body 10. After secondary adsorption in the second adsorption cavity, it is discharged through the air guide pipe 12 and the second air outlet 102 in sequence to obtain purified helium.

[0044] As a possible implementation manner, the airway tube is a rigid airway tube.

[0045] The rigid air guide tube is used to fix the barrel body inside the tank body.

[0046] As a possible implementation manner, both the first adsorption cavity and the second adsorption cavity are filled with adsorbent.

[0047] The adsorbent is filled in the first cavity and the second cavity, and in addition to performing secondary adsorption treatment on the gas, it can also play a role in fixing the barrel body.

[0048] The utility model integrates two-stage adsorption in the same helium purification tank, and can realize two-stage adsorption without using a two-stage device, so the equipment occupies a small space and has a low cost.

[0049] As a possible implementation manner, the first air outlet is externally connected to a negative pressure device.

[0050] The first gas outlet is used to discharge impure gas. Since the first gas outlet is set at the upper end of the tank body, the impure gas remaining in the tank body cannot be automatically and completely discharged. The external negative pressure device forms negative pressure inside and outside the tank body, and the impure gas is discharged from the first gas outlet under the action of negative pressure. The first gas outlet is also externally connected to a recovery device, and the recovered impure gas can be purified and reused again, and the helium recovery rate is relatively high.

[0051] As a possible implementation manner, the open end of the barrel body is coaxial and collinear with the first air outlet.

[0052] The opening end of the barrel body is coaxial and collinear with the first gas outlet, which is more conducive to the discharge of impure gas in the second adsorption cavity.

[0053] As a possible implementation, the helium purification tank has an adsorption state and an exhaust gas recovery state; see Figure 1 When in the adsorption state, the first gas outlet 101 is closed, the gas inlet 100 and the second gas outlet 102 are opened, the original gas enters from the gas inlet 100, is purified into helium through the first adsorption cavity and the second adsorption cavity, and then is discharged through the second gas outlet 102;

[0054] See also Figure 2 When in the waste gas recovery state, the air inlet 100 and the second air outlet 102 are closed, the first air outlet 101 is opened, and the impure gas in the helium purification tank is discharged through the first air outlet 101 under the negative pressure of the negative pressure device.

[0055] As a possible implementation, valves are provided on the air inlet, the first air outlet, and the second air outlet for controlling the helium purification tank to be in an adsorption state or an exhaust gas recovery state.

[0056] In the second aspect, the utility model provides a purification device, see Figure 3 , comprising N helium purification tanks 1, an air inlet pipeline 2, a first air outlet pipeline 3, and a second air outlet pipeline 4, the helium purification tank 1 is the helium purification tank provided by the first aspect of the utility model, and N≥2;

[0057] The air inlet pipeline 2 is connected to the air inlets of the N helium purification tanks 1, the first air outlet pipeline 3 is connected to the first air outlets of the N helium purification tanks 1, and the second air outlet pipeline 4 is connected to the second air outlets of the N helium purification tanks;

[0058] The first gas outlet pipeline 3 is used to discharge impure gas, and the second gas outlet pipeline 4 is used to discharge helium.

[0059] As a possible implementation, the first gas outlet pipeline is connected to a gas recovery device, which is used to recover and store impure gas in the helium purification tank.

[0060] As a possible implementation, valves corresponding to each helium purification tank are provided on the air inlet pipeline, the first air outlet pipeline, and the second air outlet pipeline, for controlling one or more helium purification tanks to be in an adsorption state or an exhaust gas recovery state.

[0061] Each helium purification tank can be in an adsorption state or an exhaust gas recovery state under the control of a valve, which is more flexible to use. In addition, the device can connect multiple helium purification tanks and has a high helium purification efficiency when working at the same time.

[0062] Compared with the prior art, the utility model has the following technical effects:

[0063] 1. The helium purification tank provided by the present invention is provided with an impure gas discharge port, which can realize the recovery of impure gas in the tank body. The recovered impure gas can be purified again by the helium purification tank, and the helium recovery rate is high.

[0064] 2. The helium purification tank provided by the utility model adopts a jacketed structural design, in which a barrel body is arranged inside the tank body, and the first forward adsorption cavity and the second reverse adsorption cavity are integrated together. The device is small in size, easy to operate, and has a high helium purification degree.

[0065] 3. The helium purification tank provided by the utility model can purify helium and recover impure gas without setting up a multi-stage adsorption device. The purification process is simple and easy to operate. Compared with a multi-stage adsorption device, the equipment cost is greatly reduced.

[0066] 4. The purification device provided by the utility model connects multiple helium purification tanks, and one or more helium purification tanks can be opened or closed according to demand. It is flexible to use and has high helium purification efficiency.

[0067] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0068] Although the utility model has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the utility model. Accordingly, this specification and the drawings are merely exemplary illustrations of the utility model as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the utility model. Obviously, those skilled in the art may make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.

Claims

1. A helium purification tank, characterized in that: Including tank body, barrel body and air guide pipe; The bottom of the tank body is provided with an air inlet, the top of the tank body is provided with a first air outlet, and the side wall of the tank body is provided with a second air outlet at one end close to the air inlet, the first air outlet is used to discharge impure gas, and the second air outlet is used to discharge helium; The barrel body is arranged inside the tank body, and a first adsorption cavity is formed between the outer wall of the barrel body and the inner wall of the tank body; the cavity of the barrel body is defined as a second adsorption cavity; The bottom end of the barrel body is connected to one end of the air guide pipe, and the other end of the air guide pipe is connected to the second air outlet.

2. The helium purification tank according to claim 1, characterized in that: The airway tube is a rigid airway tube.

3. The helium purification tank according to claim 1, characterized in that: The first adsorption cavity and the second adsorption cavity are both filled with adsorbent.

4. The helium purification tank according to claim 1, characterized in that: The open end of the barrel body is coaxial and collinear with the first air outlet.

5. The helium purification tank according to any one of claims 1 to 4, characterized in that: The helium purification tank has an adsorption state and an exhaust gas recovery state; When in the adsorption state, the first gas outlet is closed, the gas inlet and the second gas outlet are opened, the original gas enters from the gas inlet, is purified into helium through the first adsorption cavity and the second adsorption cavity, and then is discharged through the second gas outlet; When in the waste gas recovery state, the air inlet and the second air outlet are closed, the first air outlet is opened, and the impure gas in the helium purification tank is discharged through the first air outlet under the action of the pressure difference.

6. The helium purification tank according to claim 5, characterized in that: The air inlet, the first air outlet and the second air outlet are all provided with valves for controlling the helium purification tank to be in an adsorption state or an exhaust gas recovery state.

7. A purification device, characterized in that: Comprising N helium purification tanks, an air inlet pipeline, a first air outlet pipeline, and a second air outlet pipeline, wherein the helium purification tank is the helium purification tank according to any one of claims 1 to 6, and N≥2; The air inlet pipeline is communicated with the air inlets of the N helium purification tanks, the first air outlet pipeline is communicated with the first air outlets of the N helium purification tanks, and the second air outlet pipeline is communicated with the second air outlets of the N helium purification tanks; The first gas outlet pipeline is used to discharge impure gas, and the second gas outlet pipeline is used to discharge helium.

8. The purification device according to claim 7, characterized in that The first gas outlet pipeline is connected to a gas recovery device.

9. The purification device according to claim 7, characterized in that: The air inlet pipeline, the first air outlet pipeline, and the second air outlet pipeline are all provided with valves corresponding to each helium purification tank, which are used to control one or more of the helium purification tanks to be in an adsorption state or an exhaust gas recovery state.

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