High-temperature and high-durability vertical heat exchange device

Abstract

The utility model belongs to the technical field of heat exchange, and discloses a high-temperature and high-durability vertical heat exchange device which is characterized in that a plurality of heat exchange through holes penetrating through a heat storage solid in the vertical direction are distributed in the heat storage solid and used for installing heat exchange pipes, and gaps exist between the outer walls of the heat exchange pipes and the inner hole walls of the heat exchange through holes; a plurality of heating through holes penetrating through the heat storage solid in the horizontal direction are distributed in the heat storage solid and used for installing heating elements. The straight line formed by the heat exchange through holes in the heat storage solid is perpendicular to but not intersected with the straight line formed by the heating through holes in the heat storage solid. A plurality of heat insulation supporting blocks are arranged at the bottom of the heat storage solid, and the bottoms of the heat insulation supporting blocks are installed on the bottom plate. Through the design of the heat exchange through hole structure, the heat exchange pipe is in local contact with the heat storage solid, the temperature difference between the upper portion and the lower portion of the heat exchange pipe is reduced, the heat exchange pipe is prevented from bearing cold impact, and therefore the service life of the heat exchange pipe is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange, and particularly relates to a high-temperature and high-durability vertical heat exchange device. Background Art

[0002] Vertical heat exchange device is a technology that uses solid materials to store and release heat energy. It has a wide range of applications in many fields. For example, it can be used in the field of building energy conservation to store and release excess heat energy in buildings to provide heat. However, the heat exchange tubes in the existing vertical heat exchange solid heat storage device are all in contact with the heat storage solid. Figure 1 When the heat exchange tube is at rest, the temperature is consistent with that of the heat storage solid. When releasing heat, the low-temperature medium enters the heat exchange tube from the bottom and flows out from the top after the temperature rises. Due to the large temperature difference before and after the heat exchange, the heat exchange tube needs to continuously withstand the cold shock, resulting in a shorter service life and reduced heat exchange stability.

[0003] Therefore, in order to further promote the extensive role of vertical heat exchange solid thermal storage devices in the fields of solar energy utilization, building energy conservation, etc., how to extend their service life and improve the heat exchange stability performance has become one of the urgent problems to be solved in this field. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model discloses a high-temperature and high-durability vertical heat exchange device. Through the design of the heat exchange through-hole structure, the heat exchange tube is partially in contact with the heat storage solid, reducing the temperature difference between the upper and lower parts of the heat exchange tube, avoiding the heat exchange tube from being subjected to cold shock, thereby extending the service life of the heat exchange tube.

[0005] The specific technical solution of the utility model is as follows:

[0006] A high-temperature and high-durability vertical heat exchange device comprises a heat storage solid arranged in an outer frame, wherein a plurality of heat exchange through holes penetrating the heat storage solid in a vertical direction are arranged and distributed on the heat storage solid, which are used to install heat exchange tubes, and there are gaps between the outer walls of the heat exchange tubes and the inner hole walls of the heat exchange through holes; a plurality of heating through holes penetrating the heat storage solid in a horizontal direction are distributed on the heat storage solid, which are used to install heating elements; the straight line formed by the heat exchange through holes in the heat storage solid is perpendicular to but does not intersect with the straight line formed by the heating through holes in the heat storage solid; a plurality of arranged heat insulation support blocks are provided at the bottom of the heat storage solid, and the bottom of the heat insulation support blocks is installed on a bottom plate.

[0007] Preferably, the heat exchange through hole is a countersunk hole structure that is smaller at the top and larger at the bottom, and each of the heat exchange through holes includes an upper channel and a lower channel that are integrally arranged up and down, the diameter of the upper channel is smaller than the diameter of the lower channel, the inner hole wall of the upper channel is in contact with the outer wall of the heat exchange tube, and there is a gap between the inner hole wall of the lower channel and the outer wall of the heat exchange tube.

[0008] Preferably, the heat exchange through hole is an integrated heat exchange through hole with upper and lower diameters, and there is a gap between the entire heat exchange through hole and the heat exchange tube.

[0009] Preferably, the heat-insulating support block is horizontally arranged along the direction of the heating through hole, and the heat-insulating support block is detachably connected to the bottom plate.

[0010] Preferably, an I-beam is installed at the bottom of the base plate.

[0011] Preferably, the outer periphery of the heat storage solid is coated with a multi-layer insulation layer structure.

[0012] Preferably, a plurality of collectors are connected to the medium outlet at the top end of the heat exchange tube by an expansion joint, and a plurality of distributors are connected to the medium inlet at the bottom end of the heat exchange tube by an expansion joint.

[0013] Beneficial effects: The utility model discloses a high-temperature and high-durability vertical heat exchange device, which has the following advantages compared with the prior art:

[0014] (1) The heat storage solid in the utility model is placed on a heat insulation support block and installed on an I-beam through a bottom plate, which can not only realize the load-bearing of the heat storage solid, but also prevent heat conduction loss, which is beneficial to improving the heat conduction efficiency.

[0015] (2) In the utility model, the heat exchange through hole is designed as a countersunk hole structure to avoid direct contact between the lower part of the vertically arranged heat exchange tube and the heat storage solid, thereby reducing the heat exchange temperature difference between the heat exchange tube and the heat storage solid, reducing the cold shock on the heat exchange tube, and greatly extending the service life of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial schematic diagram of an existing vertical heat exchange device;

[0017] Figure 2 is a vertical cross-sectional schematic diagram of the vertical heat exchange device of Example 1;

[0018] Figure 3 It is a structural schematic diagram of the vertical heat exchange device of Example 1;

[0019] Figure 4 It is a schematic diagram of the installation between the heat exchange tube and the heat exchange through hole of Example 1;

[0020] Figure 5 It is a schematic diagram of the installation between the heat exchange tube and the heat exchange through hole of Example 2;

[0021] In the figure: heat storage solid 1, heat exchange through hole 1-1, upper channel 1-11, lower channel 1-12, heat exchange tube 2, heating element 3, collector 4, distributor 5, insulation support block 6, bottom plate 7, insulation layer structure 8, sepiolite insulation layer 8-1, aluminum silicate board insulation cotton I 8-2, aluminum silicate board insulation cotton II 8-3, expansion joint 9, I-beam 10, outer frame 11, gap 12. DETAILED DESCRIPTION

[0022] Several improvements and modifications are made to the present invention in conjunction with the accompanying drawings, and these improvements and modifications should also be regarded as within the protection scope of the present invention. Example

[0023] like Figure 2-3 As shown, a vertical heat exchange solid heat storage device comprises an outer frame 11, a heat storage solid 1 arranged in the outer frame, a heat exchange tube 2 and a heating element 3 installed in the heat storage solid 1, and a collector 4 and a distributor 5 arranged and distributed. The heat storage solid 1 is provided with a plurality of heat exchange through holes 1-1 penetrating the heat storage solid 1 in the vertical direction, for installing the heat exchange tube 2; the heat storage solid 1 is provided with a plurality of heating through holes 1-2 penetrating the heat storage solid 1 in the horizontal direction, for installing the heating element 3; the straight line formed by the heat exchange through hole 1-1 in the heat storage solid 1 is perpendicular to but not intersecting with the straight line formed by the heating through hole 1-2 in the heat storage solid 1; the heat exchange through hole 1-1 is a countersunk hole structure with a small top and a large bottom, and the bottom of the heat storage solid 1 is provided with a plurality of arranged heat insulation support blocks 6, and the heat insulation support blocks are arranged horizontally along the direction of the heating through hole, and the bottom of the heat insulation support block 6 is detachably connected to the bottom plate 7, and the bottom of the bottom plate is welded to the I-beam 10. The detachable connection in this embodiment 1 can be but is not limited to screw connection. When heat needs to be released, the low-temperature heat-conducting medium (water, air, heat-conducting oil, molten salt, etc.) can be delivered to the distributor 5 through the fluid conveying device, and the distributor 5 evenly distributes the heat-conducting medium to each heat exchange tube 2. The low-temperature heat-conducting medium exchanges heat with the heat storage solid 1 to become a high-temperature heat-conducting medium, which flows out of the heat exchange tube 2 and is then centrally delivered to the user by the collector 4.

[0024] In this embodiment 1, the heat exchange through hole 1-1 designed as a countersunk hole structure with a small top and a large bottom is specifically structured as follows: it includes an upper channel 1-11 and a lower channel 1-12 that are integrally arranged from top to bottom, and the diameter of the upper channel 1-11 is smaller than the diameter of the lower channel 1-12, and the diameter of the upper channel 1-11 matches the outer diameter of the heat exchange tube 2, and they are in contact with each other, and there is a gap 12 between the inner hole wall of the lower channel 1-12 and the outer wall of the heat exchange tube 2, and the size of the gap can be selectively designed by those skilled in the art according to actual needs. In this embodiment 1, the height of the lower channel 1-12 can be selectively designed by those skilled in the art according to actual heat exchange requirements.

[0025] In this embodiment 1, Figure 1As shown, in order to further improve the heat preservation performance and stability of the heat storage device and reduce energy loss and waste, the outer periphery of the heat storage solid 1 is coated with a multi-layer insulation layer structure 8.

[0026] The insulation layer structure layer 8 in the utility model can be but not limited to the following structure: the insulation structure layer 8 is stacked from the inside to the outside with a sepiolite insulation layer 8-1, an aluminum silicate board insulation cotton Ⅰ8-2 and an aluminum silicate board insulation cotton Ⅱ8-3. Among them, the sepiolite insulation layer is cast integrally with the heat storage solid 1, and has good heat insulation and sealing performance after casting and drying to prevent the heat storage solid 1 from oxidizing; since the thickness of the conventional aluminum silicate board is 50mm, and the thickness of the insulation layer is closely related to the temperature, the thicker the insulation layer, the slower the heat dissipation, the smaller the heat loss, and the lower the external surface temperature, so two layers of aluminum silicate board insulation cotton (aluminum silicate board insulation cotton Ⅰ8-2 and aluminum silicate board insulation cotton Ⅱ8-3) can be set to make it have better insulation performance. The thickness of the insulation layer can be selectively designed by those skilled in the art according to actual needs, so it is not described in detail.

[0027] In this embodiment 1, the plurality of collectors 4 are connected to the medium outlet at the top of the heat exchange tube 2 by an expansion joint 9, and the plurality of distributors are connected to the medium inlet at the bottom of the heat exchange tube 2 by an expansion joint. Because the expansion joint is elastic, it will not restrict the deformation of the heat exchange tube in the vertical direction, thereby affecting the service life of the heat exchange tube.

[0028] In the utility model, the heating element 3 can be but is not limited to an electric heating rod. Any existing device that can achieve uniform heating in a heat storage solid can be applicable. For example, a heat pipe or a heat exchange pipe is arranged in the heating through hole 3-2 of the heat storage solid 3, and a heat transfer medium such as high-temperature steam, waste heat flue gas, high-temperature heat transfer oil, molten salt, high-temperature high-pressure water, etc. is introduced into the heat pipe to heat up the heat storage solid and store heat.

[0029] In the present invention, the heat-insulating support block 6 can be made of heat-insulating materials such as mica. The heat-insulating support block 6 arranged at the bottom of the heat-storage solid 1 can, on the one hand, play a role in heat insulation, preventing heat from being conducted to the outside through the support block and causing losses, and on the other hand, the heat-insulating support block plays a role in supporting the overall weight of the heat-storage solid 1, thereby reducing the pressure of the heat-storage solid 1 on the bottom insulation layer structure, avoiding damage to the bottom insulation layer and affecting the service life of the insulation layer.

[0030] The design principle of the utility model is as follows:

[0031] Taking water medium as an example, Figure 1The heat exchange tubes 2 of the original vertical heat exchange device shown are all in contact with the heat storage solid 1. When standing still, the temperature of the heat exchange tubes 2 and the heat storage solid 1 is consistent. However, when releasing heat, low-temperature water enters the heat exchange tubes 2 from the bottom, and after the temperature rises, it vaporizes into water vapor and flows out from the top. The temperature difference between the front and back heat exchange is large, and the heat exchange tubes need to continuously withstand cold shock, thereby greatly reducing the service life of the heat exchange tubes.

[0032] In this embodiment 1, Figure 4 As shown, the heat exchange through hole is designed to be a countersunk hole structure with a small top and a large bottom, so that the upper part of the heat exchange tube is in contact with the heat storage solid, and the lower part has a gap 12 with the heat storage solid. Therefore, when standing still, the liquid level of the water in the heat exchange tube is kept at the lower part of the heat exchange tube 2 (at the lower channel). Since there is a gap 12 between the lower part of the heat exchange tube 2 and the heat storage solid 1, the heat transfer between the two is radiation, and the heat exchange efficiency is poor. The water in the lower part of the heat exchange tube 2 will evaporate slowly, and the lower part of the heat exchange tube 2 will continue to exchange heat and cool down with water, and the upper part of the heat exchange tube 2 will continue to exchange heat and cool down with water vapor, so that the heat exchange tube 2 is in a stable heat exchange state, and the temperature is much lower than the heat storage solid 1, so the heat storage solid can further increase the heat storage temperature.

[0033] When releasing heat, the water level will reach the upper part of the heat exchange tube 2 (i.e. fill the entire heat exchange tube), so the heat exchange efficiency is improved, which is equivalent to the low-temperature water being preheated at the lower part of the heat exchange tube 2 before reaching the upper part of the heat exchange tube 2 to accelerate the heat exchange. Compared with the existing vertical heat exchange device, the heat exchange temperature difference is smaller, and the cold shock is smaller, so the service life of the heat exchange tube 2 is greatly extended. Example

[0034] Based on the different users and application scenarios in actual use, on the basis of Example 1, this Example 2 proposes a vertical heat exchange solid heat storage device, the structure of its heat exchange through hole is different from that of Example 1, which is an integrated heat exchange through hole 1-1 with upper and lower diameters, and there is a gap 12 between the entire heat exchange through hole 1-1 and the heat exchange tube 2, such as Figure 5 As shown, the size of the gap 12 can be determined according to the actual required heat exchange efficiency. In this embodiment 2, since there is a gap 12 between the heat exchange through hole 1-1 and the heat exchange tube 2, heat exchange is achieved between the two through heat radiation, which can effectively reduce the heat exchange temperature difference and help to extend the service life of the heat exchange tube 2. The rest of the structure of this embodiment 2 is the same as that of embodiment 1.

[0035] The above is only an explanation of the utility model and is a preferred embodiment of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and modifications without departing from the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A high-temperature and high-durability vertical heat exchange device, comprising a heat storage solid arranged in an outer frame, characterized in that: A plurality of heat exchange through holes penetrating the heat storage solid in a vertical direction are arranged and distributed on the heat storage solid for installing heat exchange tubes, and there is a gap between the outer wall of the heat exchange tube and the inner hole wall of the heat exchange through hole; a plurality of heating through holes penetrating the heat storage solid in a horizontal direction are distributed on the heat storage solid for installing heating elements; the straight line formed by the heat exchange through holes in the heat storage solid is perpendicular to but does not intersect with the straight line formed by the heating through holes in the heat storage solid; a plurality of arranged heat insulation support blocks are provided at the bottom of the heat storage solid, and the bottom of the heat insulation support block is installed on the bottom plate.

2. The high-temperature and high-durability vertical heat exchange device according to claim 1, characterized in that: The heat exchange through hole is a countersunk hole structure that is small at the top and large at the bottom, and each of the heat exchange through holes includes an upper channel and a lower channel that are integrally arranged up and down. The diameter of the upper channel is smaller than the diameter of the lower channel. The inner hole wall of the upper channel is in contact with the outer wall of the heat exchange tube, and there is a gap between the inner hole wall of the lower channel and the outer wall of the heat exchange tube.

3. The high-temperature and high-durability vertical heat exchange device according to claim 1, characterized in that: The heat exchange through hole is an integrated heat exchange through hole with upper and lower diameters, and there is a gap between the entire heat exchange through hole and the heat exchange tube.

4. The high-temperature and high-durability vertical heat exchange device according to claim 1, characterized in that: The heat-insulating support block is horizontally arranged along the direction of the heating through hole, and the heat-insulating support block is detachably connected to the bottom plate.

5. The high-temperature and high-durability vertical heat exchange device according to claim 1, characterized in that: An I-beam is installed at the bottom of the base plate.

6. The high-temperature and high-durability vertical heat exchange device according to claim 1, characterized in that: The outer periphery of the heat storage solid is coated with a multi-layer heat preservation layer structure.

7. The high-temperature and high-durability vertical heat exchange device according to claim 1, characterized in that: A plurality of collectors are communicated with the medium outlet at the top end of the heat exchange tube by using an expansion joint, and a plurality of distributors are communicated with the medium inlet at the bottom end of the heat exchange tube by using an expansion joint.

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