Regenerative device with vertical heating and horizontal dual-channel balanced heat exchange

Abstract

The present invention provides a heat storage device with vertical heating and horizontal dual-channel balanced heat exchange, belonging to the technical field of heat storage. It includes a vertical channel, a horizontal air inlet channel, a horizontal air outlet channel, a air distributor, a air guide device, an air inlet chamber, an air outlet chamber, etc. The electric heating wire is installed in the vertical channel, which solves the potential hazards that may be caused by deformation under the action of gravity during long-term high-temperature operation. Especially when powered by high voltage, the safety of the system is improved. The horizontal air inlet channel and the horizontal air outlet channel are arranged in an alternating manner to form the main air path, which is orthogonal and connected to the vertical channel, forming a three-dimensional parallel air path system. This can balance the inlet air temperature difference, increase the heat exchange area, reduce the temperature gradient, promote the heat exchange flow, balance the air duct pressure, etc., so as to balance the heat exchange inside the heat storage body, significantly reduce the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, improve the heat storage capacity, heat absorption and release efficiency and dynamic response performance, and extend the service life of the electric heating wire.

Description

Technical Field

[0001] The present invention relates to a solid heat storage device, in particular to a solid heat storage device adopting a vertical heating method and having a horizontal multi-branch parallel air duct heat exchange system inside. It belongs to the technical field of heat storage. Background Art

[0002] In current solid heat storage devices, there is a lack of overall design and consideration for the ventilation and heat exchange system inside the heat storage body. In the prior art, the air duct structure formed inside the heat storage body is essentially a two-dimensional structure. A relatively typical and commonly used one is the air duct structure that alternates orthogonally on the horizontal plane. Its characteristics are that each air duct independently penetrates the entire heat storage body and is completely isolated from each other. The heating wires are generally located in multiple parallel channels among them. Obviously, such a structure will cause large temperature differences between the head and the tail of each heat exchange air duct, and will also cause large temperature differences between the heating wires located in different channels, etc.

[0003] The heat storage body is generally made up of multiple heat storage bricks stacked together. The heat storage brick structure in the prior art makes it such that generally, a part of one surface of each heat storage brick exchanges heat with the heating wire, and a part of the opposite surface exchanges heat with the gas in the heat exchange air duct. There is a relatively thick heat storage brick entity between two adjacent horizontal heating wire channels or heat exchange air ducts. The heat exchange area is small, and the temperature gradient inside the heat storage brick is large, resulting in too large a temperature difference inside the heat storage body.

[0004] Too large temperature differences between different heat storage bricks and between different spatial parts of the same heat storage brick will reduce the overall heat storage temperature, thereby reducing the heat storage capacity, affecting the heat absorption and heat release characteristics, reducing the efficiency and dynamic response performance of the heat storage system; too high temperature in the closed space of the heating wire will also significantly reduce the service life of the heating wire, etc.

[0005] The heating wires are installed in the horizontal channels. During long-term high-temperature operation, they may deform under the action of gravity. After contacting the inner wall surface of the heat storage brick, it will cause too large differences in the heat dissipation effects of each part and affect the service life. Moreover, especially when high voltage is used for power supply, it will also affect the insulation performance and pose a safety hazard; for this reason, using heat storage bricks with high insulation performance or heating wires that are not easily deformed will lead to a significant increase in manufacturing costs.

[0006] For the Chinese patent "Large-scale circulating water direct heat exchange solid heat storage electric furnace (Application No.: 201621056258.4)", a heating element is arranged at the central position inside the heat storage body, and there are hot air flow rising channels penetrating the heat storage body on both sides of the heating element. Obviously, the heating element is vertically arranged, and the hot air flow rising channels are also vertically arranged, without horizontal heat exchange channels. Summary of the Invention

[0007] To solve the above technical problems, the object of the present invention is to provide a heat storage device with vertical heating and horizontal double-channel balanced heat exchange. By installing the heating wire in the vertical channel, the potential hazards caused by deformation under the action of gravity during long-term high-temperature operation are solved; the vertical channel is orthogonal and connected to the horizontal air inlet channel and the horizontal air outlet channel, forming a three-dimensional parallel air duct system in space, which can balance the inlet air temperature difference, increase the heat exchange area, reduce the temperature gradient, promote the heat exchange flow, balance the air duct pressure, etc., so as to balance the heat exchange inside the heat storage body, significantly reduce the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, improve the heat storage capacity, heat absorption and release efficiency and dynamic response performance, and extend the service life of the heating wire. At the same time, it also has the advantages of simple structure, low cost, reliable operation and convenient maintenance.

[0008] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0009] The heat storage device with vertical heating and horizontal double-channel balanced heat exchange includes a heat storage body (1), a vertical channel (2), a horizontal air inlet channel (3), a horizontal air outlet channel (4), a air distributor (5), air distribution holes (6), a air guide device (7), air guide holes (8), an air inlet chamber (9), an air outlet chamber (10), and a heating wire (11).

[0010] There is a vertical channel (2) inside the heat storage body (1), as well as a horizontal air inlet channel (3) and a horizontal air outlet channel (4) that are orthogonal and connected to it. Multiple vertical channels (2), horizontal air inlet channels (3) and horizontal air outlet channels (4) form a three-dimensional multi-branch parallel air duct structure inside the heat storage body (1).

[0011] The air distributor (5) has multiple air distribution holes (6), corresponding to the structural dimensions of the cross-sections of multiple horizontal air inlet channels (3). The air guide device (7) has multiple air guide holes (8), corresponding to the structural dimensions of the cross-sections of multiple horizontal air outlet channels (4).

[0012] Gas enters the horizontal air inlet channel (3) from the air inlet chamber (9) through the air distribution holes (6) on the air distributor (5), passes through the vertical channel (2), and then enters the air outlet chamber (10) from the horizontal air outlet channel (4) through the air guide holes (8) to complete the heat exchange process.

[0013] The heating wire (11) is inserted into the vertical channel (2) from the upper part of the heat storage body (1) and is powered from the top of the solid heat storage device.

[0014] Further, the number of the multiple horizontal air inlet channels (3) and the horizontal air outlet channels (4) is the same.

[0015] Further, the multiple horizontal air inlet channels (3) and the horizontal air outlet channels (4) are arranged in a staggered manner in space.

[0016] Furthermore, the junctions of the horizontal air inlet channel (3), the horizontal air outlet channel (4) and the vertical channel (2) are of inclined surface or arc surface structure.

[0017] Furthermore, the air inlet chamber (9) and the air outlet chamber (10) are respectively located on both sides of the regenerator (1).

[0018] Furthermore, the inlet end and the outlet end of the heating wire (11) are located on the same side.

[0019] Furthermore, there is high-temperature heat-conducting paint (12) on the inner walls of the horizontal air inlet channel (3), the horizontal air outlet channel (4) and the vertical channel (2); there is high-temperature heat-conducting and anti-corrosion paint (13) on the surface of the heating wire (11).

[0020] Furthermore, it includes a heat-insulating layer (14) that completely wraps the regenerator (1), the air inlet chamber (9) and the air outlet chamber (10).

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. Installing the heating wire in the vertical channel solves the insulation hidden danger that may be caused by deformation under the action of gravity during long-term high-temperature operation and the adverse impact on the service life of the heating wire; at the same time, the heating wire adopts the top power supply method, which is especially convenient for wiring the main wiring, especially when high voltage is supplied, improving the safety of the system.

[0023] 2. The vertical channel is orthogonal and communicates with the horizontal air inlet channel and the horizontal air outlet channel, forming a three-dimensional parallel air path system in space, which can balance the inlet air temperature difference, promote heat exchange flow, balance the air duct pressure, etc., so as to balance the heat exchange inside the regenerator, significantly reduce the temperature difference between different regenerator bricks and different spatial parts of the same regenerator brick, improve the heat storage capacity, heat absorption and release efficiency and dynamic response performance, and improve the service life of the heating wire. At the same time, it also has the advantages of simple structure, low cost, reliable operation and convenient maintenance.

[0024] 3. Installing the air inlet chamber and the air outlet chamber on both sides of the regenerator can effectively balance the gas pressure inside the horizontal main air duct. Combined with the settings of the air distribution holes and the air guiding holes, the air paths are all horizontal air inlet channels, vertical channels and horizontal air outlet channels, so that the gas flow rate and velocity through multiple horizontal air inlet channels and horizontal air outlet channels are as balanced as possible, effectively reducing the temperature gradient and avoiding the situation of too large temperature difference inside the regenerator caused by too large velocity difference.

[0025] 4. The heat exchange process is jointly completed by the vertical channel, the horizontal air inlet channel and the horizontal air outlet channel, effectively increasing the heat exchange area; and the vertical channel can also make full use of the chimney effect to automatically promote the gas flow in the vertical air duct.

[0026] 5. The horizontally inlet air channels and horizontally outlet air channels with the same quantity are arranged in a spatially staggered manner, and the intersection with the vertical channels adopts an inclined surface or an arc surface structure to balance the air duct pressure as much as possible and eliminate the internal temperature difference of the heat storage device, so as to achieve balanced heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Front view of the heat storage device with vertical heating and horizontal double-channel balanced heat exchange.

[0028] Figure 2 : Left view of the heat storage device with vertical heating and horizontal double-channel balanced heat exchange.

[0029] In the figure: 1 - heat storage body, 2 - vertical channel, 3 - horizontal inlet air channel, 4 - horizontal outlet air channel, 5 - air distributor, 6 - air distribution holes, 7 - air guide device, 8 - air guide holes, 9 - inlet air chamber, 10 - outlet air chamber, 11 - heating wire, 12 - high-temperature heat-conducting coating, 13 - high-temperature heat-conducting and anti-corrosion coating, 14 - heat insulation layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention will be further described in detail below with reference to the accompanying drawings:

[0031] As Figure 1 shown is the front view of the heat storage device with vertical heating and horizontal double-channel balanced heat exchange, Figure 2 shown is the left view of the heat storage device with vertical heating and horizontal double-channel balanced heat exchange. It can be seen from Figure 1 and Figure 2 that the heat storage device with vertical heating and horizontal double-channel balanced heat exchange includes a heat storage body (1), a vertical channel (2), a horizontal inlet air channel (3), a horizontal outlet air channel (4), an air distributor (5), air distribution holes (6), an air guide device (7), air guide holes (8), an inlet air chamber (9), an outlet air chamber (10), a heating wire (11), a high-temperature heat-conducting coating (12), a high-temperature heat-conducting and anti-corrosion coating (13), and a heat insulation layer (14).

[0032] Figure 1 In , the heat storage body (1) has a vertical channel (2) inside, as well as a horizontal inlet air channel (3) and a horizontal outlet air channel (4) that are orthogonal and connected to it. Multiple vertical channels (2), horizontal inlet air channels (3), and horizontal outlet air channels (4) form a spatial three-dimensional multi-branch parallel air duct structure inside the heat storage body (1).

[0033] Figure 1In it, the air inlet chamber (9) and the air outlet chamber (10) are respectively located on both sides of the regenerator (1), which can effectively balance the gas pressure inside the vertical main air duct. There are multiple air distribution holes (6) on the air distributor (5), corresponding to the structural dimensions of the cross-sections of multiple horizontal air inlet channels (3). There are multiple air guiding holes (8) on the air guide (7), corresponding to the structural dimensions of the cross-sections of multiple horizontal air outlet channels (4). This enables the gas flow rate and velocity passing through the multiple horizontal air inlet channels (3) and horizontal air outlet channels (4) to be as balanced as possible, effectively reducing the temperature gradient, achieving relatively balanced air inlet temperature, avoiding large temperature differences caused by different air inlet temperatures on each heat exchange surface, and thus controlling the temperature differences of the air inlet and air outlet passing through the inside of the regenerator (1) at a relatively small level.

[0034] Figure 1 In it, the air path system is divided into multiple paths. The gas in each path enters the horizontal air inlet channel (3) through the air distribution holes (6) on the air distributor (5) from the air inlet chamber (9), passes through a small vertical channel (2), and then enters the air outlet chamber (10) through the air guiding holes (8) from the horizontal air outlet channel (4), completing the heat exchange process. Compared with the traditional single heat exchange air path structure, it obviously effectively increases the heat exchange area. Moreover, the regenerator (1) is built by stacking multiple regenerator bricks. The design of the vertical channel (2) enables the side surfaces of the regenerator bricks to also participate in heat exchange, thereby balancing the heat exchange inside the regenerator and avoiding the situation where the distance between the regenerator bricks and the heat exchange surface is too thick. Combining the designs of the horizontal air inlet channel (3) and the horizontal air outlet channel (4) significantly reduces the temperature differences between different regenerator bricks and different spatial parts of the same regenerator brick; improves the heat storage capacity, heat absorption and release efficiency, and dynamic response performance, and extends the service life of the heating wire. In addition, the vertical channel (2) can also make full use of the chimney effect to automatically promote gas flow.

[0035] Figure 1 In it, the heating wire (11) is inserted into the vertical channel (2) from the upper part of the regenerator (1), and is powered from the top of the solid heat storage device. And the inlet end and the outlet end of the heating wire (11) are located on the same side. This solves the insulation hidden danger and the adverse impact on the service life of the heating wire that may occur due to deformation under the action of gravity during long-term high-temperature operation. At the same time, the heating wire adopts the top power supply method, which is especially convenient for wiring the main wiring, especially when powered by high voltage, improving the safety of the system.

[0036] Figure 2 In it, starting from the bottom, there are 4 horizontal air inlet channels (3) in each odd row, a total of 12, and 4 horizontal air outlet channels (4) in each even row, a total of 12. The multiple horizontal air inlet channels (3) and horizontal air outlet channels (4) are staggered in space and have the same number. This can balance the air duct pressure as much as possible, eliminate the internal temperature difference of the heat storage device, and thus achieve balanced heat exchange.

[0037] Figure 2Among them, high-temperature heat-conducting coatings (12) are provided on the inner walls of the horizontal air inlet channel (3), the horizontal air outlet channel (4) and the vertical channel (2), and a high-temperature heat-conducting and anti-corrosion coating (13) is provided on the surface of the heating wire (11). The high-temperature heat-conducting coating (12) can effectively enhance the ability of the air passage wall surface to absorb infrared radiation and convective heat transfer with the gas, while the high-temperature heat-conducting and anti-corrosion coating (13) can improve the anti-corrosion ability of the heating wire (11) and extend its service life without affecting the heat radiation of the heating wire (11) to the outside.

[0038] Figure 1 and Figure 2 Among them, the heat insulation layer (14) completely wraps the heat storage body (1), the air inlet chamber (9) and the air outlet chamber (10) to achieve heat preservation and heat storage of the entire heat storage body (1).

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat storage device with vertical heating and horizontal dual-channel balanced heat exchange, characterized in that: It includes a heat storage body (1), a vertical channel (2), a horizontal air inlet channel (3), a horizontal air outlet channel (4), an air distributor (5), air distribution holes (6), a wind guide (7), wind guide holes (8), an air inlet chamber (9), an air outlet chamber (10), and heating wires (11); Inside the heat storage body (1), there is a vertical channel (2), as well as a horizontal air inlet channel (3) and a horizontal air outlet channel (4) that are orthogonal and connected to it. Multiple vertical channels (2), horizontal air inlet channels (3), and horizontal air outlet channels (4) form a spatial three-dimensional multi-branch parallel air path structure inside the heat storage body (1); The air distributor (5) has multiple air distribution holes (6), which correspond to the structural dimensions of the cross-sections of multiple horizontal air inlet channels (3). The wind guide (7) has multiple wind guide holes (8), which correspond to the structural dimensions of the cross-sections of multiple horizontal air outlet channels (4); The gas enters the horizontal air inlet channel (3) from the air inlet chamber (9) through the air distribution holes (6) on the air distributor (5), passes through the vertical channel (2), and then enters the air outlet chamber (10) from the horizontal air outlet channel (4) through the wind guide holes (8) to complete the heat exchange process; The heating wires (11) are inserted into the vertical channels (2) from the upper part of the heat storage body (1) and are powered from the top of the solid heat storage device; The number of the multiple horizontal air inlet channels (3) and the horizontal air outlet channels (4) is the same; The multiple horizontal air inlet channels (3) and the horizontal air outlet channels (4) are arranged staggeredly in space.

2. The heat storage device with vertical heating and horizontal dual-channel balanced heat exchange according to claim 1, wherein: The junctions of the horizontal air inlet channel (3), the horizontal air outlet channel (4) and the vertical channel (2) are of inclined plane or arc surface structure.

3. The regenerative heat storage device with vertical heating and horizontal dual-channel balanced heat exchange according to claim 1, characterized in that: The air inlet chamber (9) and the air outlet chamber (10) are respectively located on both sides of the heat storage body (1).

4. The heat storage device with vertical heating and horizontal dual-channel balanced heat exchange according to claim 1, characterized in that: The inlet end and the outlet end of the heating wire (11) are on the same side.

5. The regenerative heat storage device with vertical heating and horizontal dual-channel balanced heat exchange according to claim 1, wherein: There is a high-temperature heat-conducting coating (12) on the inner walls of the horizontal air inlet channel (3), the horizontal air outlet channel (4) and the vertical channel (2); there is a high-temperature heat-conducting and anti-corrosion coating (13) on the surface of the heating wire (11).

6. The regenerative heat storage device with vertical heating and horizontal dual-channel balanced heat exchange according to claim 1, characterized in that: It includes a heat insulation layer (14) that completely wraps the heat storage body (1), the air inlet chamber (9) and the air outlet chamber (10).

Images