Gas inertization device for solid thermal storage system by elimination method

Abstract

The present invention proposes a gas inertization treatment device of a solid heat storage system by elimination method, which belongs to the field of heat storage technology. It includes a heating channel, a heating wire, a heat exchange channel, a gas inertization treatment device, etc. The gas inertization treatment device is used to eliminate the oxygen in the internal circulating gas and then send it back to the sealed solid heat storage system; before the air enters the gas inertization treatment device, an adsorption device is used to eliminate large particle impurities and water vapor in the circulating gas, and a filtering device is used to eliminate sulfur-containing gas and other corrosive gas components in the circulating gas. The oxidation of the heating wire is effectively slowed down, and the heating wire is directly involved in ventilation and heat exchange during the heat storage process, which effectively reduces the working temperature of the heating wire, thereby greatly improving the service life of the heating wire. At the same time, the heat exchange area inside the heat storage body is expanded, and the heat storage capacity, heat absorption and heat release efficiency and dynamic response performance are improved. It also has the advantages of simple structure, low cost, reliable operation and convenient maintenance.

Description

Technical Field

[0001] The present invention relates to a gas inertization treatment device, in particular to a gas inertization treatment device which treats the air entering a solid thermal storage system by eliminating oxygen, and belongs to the technical field of solid electric thermal storage. Background Art

[0002] At present, the interior of the solid heat storage device is generally composed of two types of air ducts, one is the heating channel with a heating wire installed inside, and the other is the heat exchange channel; these two air ducts are generally independent and completely isolated from each other. The main reason is that if the heating channel with the heating wire installed is connected to the heat exchange channel, when the heating wire is working, the flow of air may cause accelerated oxidation of the surface of the heating wire, shortening the service life of the heating wire.

[0003] The heating channel is not connected to the heat exchange channel, that is, there is no convection heat exchange with the air. The heating channel and the heat exchange channel can only exchange heat through conduction of the heat storage body. The disadvantage is that the heat exchange area inside the heat storage body is reduced, which increases the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, reducing the heat storage capacity, heat absorption and heat release efficiency and dynamic response performance. At the same time, it will also cause the internal ambient temperature of the heating channel to be too high when the heating wire is working, shortening the service life of the heating wire, etc.

[0004] In the prior art, there is a method of enclosing the heating wire in a high temperature resistant alloy shell to isolate the air and prevent the heating wire from oxidation. However, since the heating wire and the inner wall of the heating channel around it are mainly heat-radiated, the heat exchange efficiency and dynamic response performance are still affected, and this problem has not been fundamentally solved.

[0005] Solid heat storage devices work in different environments and are generally not completely sealed. The inside of the device is connected to the outside atmosphere. On the one hand, there may be water vapor, dust, etc., and on the other hand, there may be corrosive gases such as sulfur, which will affect the service life of the heating wire and even the heat storage bricks. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a gas inertization treatment device for a solid heat storage system by the elimination method, which can eliminate oxygen inside the solid heat storage system and effectively slow down the oxidation of the heating wire; the heating channel is incorporated into the heat exchange air path to reduce the working temperature of the heating wire, thereby greatly improving the service life of the heating wire. At the same time, the heat exchange area inside the heat storage body is expanded, and the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick is significantly reduced, thereby improving the heat storage capacity, heat absorption and heat release efficiency, and dynamic response performance. It also has the advantages of simple structure, low cost, reliable operation, and convenient maintenance.

[0007] The technical solution adopted by the present invention to solve the technical problem is:

[0008] The gas inerting treatment device of the solid heat storage system by the elimination method comprises a heat storage body (1), a heating channel (2), an electric heating wire (3), a heat exchange channel (4), an air inlet chamber (5), an air outlet chamber (6), an air inlet (7), an air outlet (8), a gas inerting treatment device (9), an air intake port (10), an air supply port (11), and a balance port (12).

[0009] The heat storage body (1) has a plurality of heating channels (2), and electric heating wires (3) are installed inside the heating channels (2). A plurality of heat exchange channels (4) are connected to an air inlet chamber (5) and an air outlet chamber (6) inside the heat storage body (1), and are connected to a plurality of heating channels (2) that are spatially orthogonal to the heat storage body (1). The air inlet (7) is connected to the air inlet chamber (5), and the air outlet (8) is connected to the air outlet chamber (6).

[0010] The circulating gas in the air outlet chamber (6) is led out through the air intake port (10) and enters the gas inertization treatment device (9). After oxygen in the circulating gas is eliminated, the circulating gas is then sent into the air inlet chamber (5) through the air supply port (11);

[0011] The balance port (12) connects the air outlet chamber (6) to the external atmosphere.

[0012] Furthermore, the gas inerting treatment device (9) comprises a combustion material (13) and a combustion chamber (14), and the combustion material (13) is fully combusted with the circulating gas in the combustion chamber (14) to generate a solid substance or a non-volatile liquid substance.

[0013] Furthermore, the gas inertization treatment device (9) is provided with an adsorption device (15) to remove large particle impurities and water vapor in the circulating gas.

[0014] Furthermore, the gas inerting treatment device (9) is provided with a filtering device (16) for removing sulfur-containing gas and other corrosive gas components in the circulating gas.

[0015] Furthermore, it includes an oxygen content sensor (17) installed in the air outlet chamber (6) to monitor the oxygen content in real time. When the oxygen content is high, the gas inertization treatment device (9) operates until the oxygen content is lower than a set threshold value and then stops operating.

[0016] Furthermore, it comprises a pressure balancing valve (18) installed on the balancing port (12), so that the gas pressure inside and outside the solid thermal storage system is the same, and the internal circulating gas is isolated from the external atmosphere under normal operation.

[0017] Furthermore, the solid thermal storage system is a sealed system.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The gas inertization treatment device is used to remove the oxygen in the internal circulating gas and then send it back to the sealed solid heat storage system, which effectively slows down the oxidation of the heating wire and allows the heating wire to directly participate in ventilation and heat exchange during the heat storage process, effectively reducing the working temperature of the heating wire, thereby greatly improving the service life of the heating wire. At the same time, the heating channel is incorporated into the heat exchange air path, which expands the heat exchange area inside the heat storage body, significantly reduces the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, and improves the heat storage capacity, heat absorption and heat release efficiency and dynamic response performance. It also has the advantages of simple structure, low cost, reliable operation and convenient maintenance.

[0020] 2. In the gas inerting treatment device, oxygen is fully eliminated through combustion to generate solid matter or non-volatile liquid matter, which will not cause unpredictable effects on the circulating gas composition.

[0021] 3. Before the air enters the gas inerting treatment device, an adsorption device is used to eliminate large particle impurities and water vapor in the circulating gas, and a filtering device is used to eliminate sulfur-containing gas and other corrosive gas components in the circulating gas. This not only extends the service life of the heating wire and heat storage bricks, but also effectively ensures the working efficiency and effect of the gas inerting treatment device.

[0022] 4. An oxygen content sensor is used to monitor the oxygen content of the circulating gas and control the operation of the gas inertization treatment device. At the same time, a pressure balance valve is used to balance the internal and external pressures, and under normal circumstances, the internal circulating gas is isolated from the external atmosphere. This ensures that the oxygen content inside the thermal storage device can always be kept at a minimum, and prevents the internal pressure from being too high or too low, making the system safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 : Schematic diagram of system structure.

[0024] In the figure: 1-heat storage body, 2-heating channel, 3-electric heating wire, 4-heat exchange channel, 5-air inlet chamber, 6-air outlet chamber, 7-air inlet, 8-air outlet, 9-gas inertization treatment device, 10-air intake port, 11-air supply port, 12-balance port, 13-combustion material, 14-combustion chamber, 15-adsorption device, 16-filtering device, 17-oxygen content sensor, 18-pressure balance valve. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings:

[0026] like Figure 1The figure shows a schematic diagram of the system structure. The gas inerting treatment device of the solid heat storage system using the displacement method comprises a heat storage body (1), a heating channel (2), a heating wire (3), a heat exchange channel (4), an air inlet chamber (5), an air outlet chamber (6), an air inlet (7), an air outlet (8), a gas inerting treatment device (9), an air intake port (10), an air supply port (11), a balance port (12), a combustion material (13), a combustion chamber (14), an adsorption device (15), a filtering device (16), an oxygen content sensor (17), and a pressure balance valve (18).

[0027] Figure 1 In the embodiment, a heat storage body (1) has a plurality of heating channels (2), and a heating wire (3) is installed inside the heating channel (2). A plurality of heat exchange channels (4) are connected to an air inlet chamber (5) and an air outlet chamber (6) inside the heat storage body (1), and are connected to a plurality of heating channels (2) orthogonal to the space thereof along the way. The air inlet (7) is connected to the air inlet chamber (5), and the air outlet (8) is connected to the air outlet chamber (6). The heating channel (2) is incorporated into the heat exchange air path, thereby expanding the heat exchange area inside the heat storage body, significantly reducing the temperature difference between different heat storage bricks and different spatial locations of the same heat storage brick, and improving the heat storage capacity, heat absorption and heat release efficiency, and dynamic response performance.

[0028] Figure 1 In the invention, the solid heat storage system is a sealed system. When the system is working normally, the oxygen content sensor (17) installed in the air outlet chamber (6) monitors the oxygen content in real time. When the oxygen content is high, the gas inertization treatment device (9) works to lead the circulating gas in the air outlet chamber (6) through the air intake port (10) and enter the gas inertization treatment device (9). After the oxygen in the circulating gas is eliminated, the circulating gas is sent to the air inlet chamber (5) through the air supply port (11); the system stops working when the oxygen content is lower than the set threshold. The oxidation of the heating wire is effectively slowed down, and the heating wire can directly participate in ventilation and heat exchange during the heat storage process, which effectively reduces the working temperature of the heating wire, thereby greatly improving the service life of the heating wire.

[0029] Figure 1 In the process, the combustion product (13) in the gas inertization treatment device (9) is fully burned with the circulating gas in the combustion chamber (14) to generate solid matter or non-volatile liquid matter, without causing unpredictable effects on the composition of the circulating gas.

[0030] Figure 1In the process, the circulating gas first passes through the adsorption device (15) to remove large particles of impurities and water vapor, then passes through the filtering device (16) to remove sulfur-containing gas and other corrosive gas components, and then enters the combustion chamber (14) for full combustion. The adverse effects of impurities, water vapor, sulfur-containing gas and other corrosive gas components on the electric heating wire and heat storage bricks are effectively avoided, which not only prolongs the service life of the electric heating wire and heat storage bricks, but also effectively guarantees the working efficiency and effect of the gas inertization treatment device. The effect is particularly significant when the solid heat storage system works under harsh environmental conditions or is restarted after being stopped for a long time.

[0031] Figure 1 In the embodiment, a pressure balancing valve (18) installed on the balancing port (12) connects the air outlet chamber (6) with the external atmosphere. When the internal pressure of the air outlet chamber (6) is substantially the same as that of the external atmosphere, the pressure balancing valve (18) is closed to isolate the internal circulating gas from the external atmosphere, thereby keeping the oxygen content inside the heat storage device at a minimum. When there is a certain pressure difference between the internal pressure of the air outlet chamber (6) and the external atmosphere, the pressure balancing valve (18) is opened to prevent the internal pressure from being too high or too low, thereby ensuring safe and reliable operation of the system.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas inertization treatment device for a solid thermal storage system by elimination method, characterized in that: It comprises a heat storage body (1), a heating channel (2), an electric heating wire (3), a heat exchange channel (4), an air inlet chamber (5), an air outlet chamber (6), an air inlet (7), an air outlet (8), a gas inertization treatment device (9), an air intake port (10), an air supply port (11), and a balance port (12); The heat storage body (1) has a plurality of heating channels (2), and electric heating wires (3) are installed inside the heating channels (2). A plurality of heat exchange channels (4) are connected to an air inlet chamber (5) and an air outlet chamber (6) inside the heat storage body (1), and are connected to a plurality of heating channels (2) that are spatially orthogonal to the heat storage body (1). The air inlet (7) is connected to the air inlet chamber (5), and the air outlet (8) is connected to the air outlet chamber (6). The circulating gas in the air outlet chamber (6) is led out through the air intake port (10) and enters the gas inertization treatment device (9). After oxygen in the circulating gas is eliminated, the circulating gas is then sent into the air inlet chamber (5) through the air supply port (11); The balance port (12) connects the air outlet chamber (6) to the external atmosphere; The gas inertization treatment device (9) comprises a combustion material (13) and a combustion chamber (14), wherein the combustion material (13) is fully combusted with the circulating gas in the combustion chamber (14) to generate a solid substance or a non-volatile liquid substance; It comprises an oxygen content sensor (17) installed in the air outlet chamber (6) to monitor the oxygen content in real time. When the oxygen content is high, the gas inertization treatment device (9) operates until the oxygen content is lower than a set threshold value and then stops operating. It comprises a pressure balancing valve (18) installed on the balancing port (12) to make the gas pressure inside and outside the solid thermal storage system the same and to isolate the internal circulating gas from the external atmosphere under normal operation.

2. The gas inertization treatment device for solid thermal storage system according to claim 1, characterized in that: The gas inertization treatment device (9) includes an adsorption device (15) for removing large particle impurities and water vapor in the circulating gas.

3. The gas inertization treatment device of the solid thermal storage system according to claim 1, characterized in that: The gas inertization treatment device (9) has a filtering device (16) for removing sulfur-containing gas and other corrosive gas components in the circulating gas.

4. The gas inertization treatment device of the solid thermal storage system according to claim 1, characterized in that: The solid heat storage system is a sealed system.

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