A gas hydrate cold storage device and method

Abstract

A gas hydrate cold storage device and method, belonging to the field of cold storage and energy saving. A cover is provided on the hydrate generation kettle, and an exhaust port and an air inlet are provided on the cover. A liquid outlet and a liquid inlet are also provided on the side of the hydrate generation kettle; the output end of the gas storage tank is connected with an air pump, a one-way valve I, a control valve, a compressor and an air inlet in sequence; the carbon dioxide generation tank is connected to the input end I of the gas storage tank, and a one-way valve II is provided between the carbon dioxide generation tank and the input end I of the gas storage tank; a one-way valve IV is provided between the separator and the gas storage tank; a heat exchange tube is provided on the outside of the hydrate generation kettle. The present invention can not only accelerate the fusion efficiency of gas and water, but also re-introduce the gas that has not been fused with water into the cylinder, so that it can be mixed with the gas in the original pipeline, so that the gas in the original pipeline is cooled in advance, and then it can quickly reach a predetermined temperature when entering the hydrate reactor, further ensuring the fusion efficiency.

Description

Technical Field

[0001] The invention relates to a gas hydrate cold storage device and method, belonging to the field of cold storage and energy saving. Background Art

[0002] Traditional refrigeration systems use chemicals such as Freon, which have problems such as high energy consumption and greenhouse gas emissions, and are not conducive to sustainable development. Research on hydrate cold storage systems can take advantage of the heat absorption and heat release characteristics of hydrates, use cheap electricity to convert cold into hydrate crystals for cold storage during low-peak hours at night, and release heat for cooling during peak hours during the day, so as to achieve the rational use of energy and achieve the purpose of shifting peaks and filling valleys, which is expected to reduce energy consumption and environmental pollution. However, in the current common hydrate cold storage system, the gas and water fusion efficiency is low during the process of forming hydrates, which results in a long time consumption and waste of electricity, so improvements have been made. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems existing in the background technology and to provide a gas hydrate cold storage device and method.

[0004] The present invention achieves the above-mentioned purpose by adopting the following technical solutions:

[0005] A gas hydrate cold storage device comprises a hydrate generating kettle, a carbon dioxide generating tank and a gas storage tank; the hydrate generating kettle is provided with a cover, the cover is provided with an exhaust port and an air inlet, and the side of the hydrate generating kettle is also provided with a liquid outlet and a liquid inlet; the output end of the gas storage tank is connected with an air pump, a one-way valve I, a control valve, a compressor and an air inlet in sequence; the carbon dioxide generating tank is connected with an input end I of the gas storage tank, and a one-way valve II is provided between the carbon dioxide generating tank and the input end I of the gas storage tank; the liquid outlet of the hydrate generating kettle is connected with a throttle valve, a solution pump I, a hydrate decomposer and a separator in sequence; the gas output end of the separator is connected with an input end II of the gas storage tank, and the liquid output end of the separator is connected with a solution pump II, a one-way valve III and a liquid inlet in sequence; a one-way valve IV is provided between the separator and the gas storage tank; a heat exchange pipe is provided on the outside of the hydrate generating kettle.

[0006] A method for using a gas hydrate cold storage device, the method comprising the following steps:

[0007] Step 1: In the cold storage state, a cold carrier is introduced into the heat exchange tube, and then the air pump and the control valve are turned on to allow the carbon dioxide in the gas storage tank to enter the hydrate formation kettle through the one-way valve I and the air inlet;

[0008] Step 2: After the gas enters the hydrate formation kettle, part of the gas is dissolved into the solution, and the other part of the unfused gas increases the gas pressure at the upper end of the liquid surface in the cylinder, pushing the liquid level in the cylinder down, thereby driving the liquid level in the gap between the cylinder and the hydrate formation kettle to rise, and higher than the liquid inlet pipe, so that it flows into the cylinder through the one-way control valve, and part of the unfused gas forms bubbles that pass through the hydrate, and then is discharged from the exhaust port, and is again pressurized by the compressor through the pipe connected to it, and then enters the cylinder from the air inlet;

[0009] Step 3: When in the cooling state, open the throttle valve, solution pump I and solution pump II. After the liquid in the hydrate generation kettle enters the hydrate decomposer, the stored cold is released. After the carbon dioxide hydrate is completely decomposed, it enters the separator, where the carbon dioxide enters the gas storage tank, and the liquid flows back into the hydrate generation kettle.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can not only accelerate the fusion efficiency of gas and water, but also can re-introduce the gas that has not been fused with water into the cylinder to mix it with the gas in the original pipeline, so that the gas in the original pipeline can be cooled in advance, and then can quickly reach a predetermined temperature when entering the hydrate reactor, thereby further ensuring the fusion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of a gas hydrate cold storage device of the present invention;

[0012] Figure 2 It is a structural schematic diagram of a hydrate generating kettle of a gas hydrate cold storage device of the present invention;

[0013] Figure 3 It is a structural schematic diagram of a hydrate generating kettle in a ventilated state of a gas hydrate cold storage device of the present invention.

[0014] In the figure: 1. hydrate formation kettle; 101. cover; 102. round tube; 103. air inlet; 104. exhaust port; 105. liquid inlet pipe; 106. one-way control valve; 107. liquid outlet; 108. liquid inlet; 2. heat exchange tube; 3. compressor; 4. gas storage tank; 5. carbon dioxide generation tank; 6. air pump; 7. separator; 8. hydrate decomposer; 9. solution pump I; 10. solution pump II; 11. throttle valve; 12. one-way valve III; 13. one-way valve II; 14. one-way valve IV; 15. one-way valve I; 16. one-way valve V; 17. control valve. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] Specific implementation method 1: Figure 1-3 As shown, this embodiment describes a gas hydrate cold storage device, including a hydrate generation kettle 1, a carbon dioxide generation tank 5 and a gas storage tank 4; the hydrate generation kettle 1 is provided with a cover 101, the cover 101 is provided with an exhaust port 104 and an air inlet 103, and the side of the hydrate generation kettle 1 is also provided with a liquid outlet 107 and a liquid inlet 108; the output end of the gas storage tank 4 is connected to the air pump 6, the one-way valve I 15, the control valve 17, the compressor 3 and the air inlet 103 in sequence; the carbon dioxide generation tank 5 is connected to the input end I of the gas storage tank 4 A one-way valve II 13 is provided between the carbon dioxide generation tank 5 and the input end I of the gas storage tank 4; the liquid outlet 107 of the hydrate generation kettle 1 is connected to the throttle valve 11, the solution pump I 9, the hydrate decomposer 8 and the separator 7 in sequence; the gas output end of the separator 7 is connected to the input end II of the gas storage tank 4, and the liquid output end of the separator 7 is connected to the solution pump II 10, the one-way valve III 12 and the liquid inlet 108 in sequence; a one-way valve IV 14 is provided between the separator 7 and the gas storage tank 4; a heat exchange tube 2 is provided on the outside of the hydrate generation kettle 1.

[0017] The exhaust port 104 is connected to the pipeline between the one-way valve I15 and the control valve 17. In the cold storage stage, the gas that is not fused with the solution and is introduced into the hydrate reactor 1 forms bubbles in the solution, and after being discharged from the exhaust port 104, it carries out part of the cold in the hydrate reactor 1 and mixes with the room temperature gas released from the gas storage tank 4, so that the temperature of the room temperature gas is initially reduced, and then the mixed gas can be reduced to the predetermined temperature more quickly after entering the hydrate reactor 1, reducing the time required for the temperature to change to the predetermined temperature, so that the gas entering the hydrate reactor 1 has sufficient time to fuse, thereby achieving the purpose of improving the fusion efficiency.

[0018] A one-way valve V16 is provided on the pipeline connected to the exhaust port 104 .

[0019] The lower end of the cover 101 is fixedly connected with a cylinder 102, and the height of the cylinder 102 is less than the height of the hydrate generation kettle 1; a plurality of liquid inlet pipes 105 are arranged on the side of the cylinder 102, and a one-way control valve 106 is arranged on the liquid inlet pipe 105. When the pressure of the solution inside the cylinder 102 increases, the liquid surface inside the cylinder 102 moves downward, and the liquid surface in the gap between the cylinder 102 and the hydrate generation kettle 1 moves upward, and flows into the cylinder 102 from the liquid inlet pipe 105, so as to promote the flow of the solution, so that the solution at different positions can move into the cylinder 102, and fully contact with the gas, thereby improving the fusion efficiency.

[0020] The air inlet 103 is communicated with the interior of the cylinder 102 ; the air outlet 104 is communicated with the gap between the cylinder 102 and the hydrate generating kettle 1 .

[0021] A method for using a gas hydrate cold storage device, the method comprising the following steps:

[0022] Step 1: In the cold storage state, a cold carrier is introduced into the heat exchange tube 2, and then the air pump 6 and the control valve 17 are turned on to allow the carbon dioxide in the gas storage tank 4 to enter the hydrate generation kettle 1 through the one-way valve I15 and the air inlet 103, and merge with the liquid inside to form carbon dioxide hydrate;

[0023] Step 2: After the gas enters the hydrate generation kettle 1, part of the gas is dissolved into the hydrate, and the other part of the unfused gas increases the gas pressure at the upper end of the liquid surface in the cylinder 102, pushing the liquid surface in the cylinder 102 to decrease, thereby driving the liquid surface in the gap between the cylinder 102 and the hydrate generation kettle 1 to rise, and higher than the liquid inlet pipe 105, so that it flows into the cylinder 102 through the one-way control valve 106, and part of the unfused gas forms bubbles and passes through the hydrate, and then is discharged from the exhaust port 104, and is pressurized again by the compressor 3 through the pipeline connected thereto, and then enters the cylinder 102 from the air inlet 103;

[0024] Step 3: When in the cooling state, open the throttle valve 11, solution pump I9, and solution pump II10. After the liquid in the hydrate generation kettle 1 enters the hydrate decomposer 8, the stored cold is released. After the carbon dioxide hydrate is completely decomposed, it enters the separator 7, wherein the carbon dioxide enters the gas storage tank 4, and the liquid flows back into the hydrate generation kettle 1.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms of assembly without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas hydrate cold storage device, characterized in that: The invention comprises a hydrate generating kettle (1), a carbon dioxide generating tank (5) and a gas storage tank (4); the hydrate generating kettle (1) is provided with a cover (101), the cover (101) is provided with an exhaust port (104) and an air inlet (103), and the side of the hydrate generating kettle (1) is also provided with a liquid outlet (107) and a liquid inlet (108); the output end of the gas storage tank (4) is connected with an air pump (6), a one-way valve I (15), a control valve (17), a compressor (3) and the air inlet (103) in sequence; the carbon dioxide generating tank (5) is connected with the input end I of the gas storage tank (4), and the carbon dioxide generating tank (5) is connected with the input end I of the gas storage tank (4). A one-way valve II (13) is provided between the input end I of the gas storage tank (4); the liquid outlet (107) of the hydrate formation kettle (1) is connected to the throttle valve (11), the solution pump I (9), the hydrate decomposer (8) and the separator (7) in sequence; the gas output end of the separator (7) is connected to the input end II of the gas storage tank (4), and the liquid output end of the separator (7) is connected to the solution pump II (10), the one-way valve III (12) and the liquid inlet (108) in sequence; a one-way valve IV (14) is provided between the separator (7) and the gas storage tank (4); a heat exchange pipe (2) is provided on the outside of the hydrate formation kettle (1); The lower end of the cover (101) is fixedly connected to a cylinder (102), the height of the cylinder (102) being less than the height of the hydrate generating kettle (1); a plurality of liquid inlet pipes (105) are provided on the side of the cylinder (102), and a one-way control valve (106) is provided on the liquid inlet pipe (105); The air inlet (103) is in communication with the interior of the cylinder (102); and the air outlet (104) is in communication with the gap between the cylinder (102) and the hydrate forming kettle (1).

2. A gas hydrate cold storage device according to claim 1, characterized in that: The exhaust port (104) is connected to a pipeline between the one-way valve I (15) and the control valve (17).

3. A gas hydrate cold storage device according to claim 2, characterized in that: A one-way valve V (16) is provided on the pipeline connected to the exhaust port (104).

4. The method for using a gas hydrate cold storage device according to claim 3, characterized in that: The method of use comprises the following steps: Step 1: In the cold storage state, a cold carrier is introduced into the heat exchange tube (2), and then the air pump (6) and the control valve (17) are turned on to allow the carbon dioxide in the gas storage tank (4) to enter the hydrate generation kettle (1) through the one-way valve I (15) and the air inlet (103); Step 2: After the gas enters the hydrate generation kettle (1), part of the gas is dissolved in the hydrate, and the other part of the unfused gas increases the gas pressure at the upper end of the liquid surface in the cylinder (102), pushing the liquid surface in the cylinder (102) to decrease, thereby driving the liquid surface in the gap between the cylinder (102) and the hydrate generation kettle (1) to rise and become higher than the liquid inlet pipe (105), so that it flows into the cylinder (102) through the one-way control valve (106), and part of the unfused gas forms bubbles and passes through the hydrate, and then is discharged from the exhaust port (104), and is pressurized again by the compressor (3) through the pipeline connected thereto, and then enters the cylinder (102) from the air inlet (103); Step 3: When in the cooling state, open the throttle valve (11), solution pump I (9), and solution pump II (10), and the liquid in the hydrate generation kettle (1) enters the hydrate decomposer (8), releasing the stored cold. After the carbon dioxide hydrate is completely decomposed, it enters the separator (7), wherein the carbon dioxide enters the gas storage tank (4), and the liquid flows back into the hydrate generation kettle (1).

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