CN213090550U

CN213090550U - Immersed solid heat reservoir

Info

Publication number: CN213090550U
Application number: CN202021264698.5U
Authority: CN
Inventors: 邹洋; 王心怡
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-04-30
Anticipated expiration: 2030-07-01

Abstract

The utility model discloses an submergence formula solid heat reservoir, this heat reservoir include metal box, solid heat-retaining material, filter, buffer layer, heat preservation etc.. The utility model provides a solid heat-retaining material passes through heat transfer through-hole direct contact heat transfer with heat transfer working medium, can effectively avoid metal heat exchange tube and heat-retaining material coefficient of expansion inconsistent and the easy crackle scheduling problem that produces that leads to, has reduced the equipment investment cost of solid heat-retaining system simultaneously by a wide margin. Furthermore, the utility model provides a solid heat-retaining material submergence is in heat transfer working medium, even the system produces the crackle after long-time operation, also can be filled up by heat transfer working medium in the crackle, has effectively avoided the problem that the heat transfer effect that solid heat-retaining material caused because of the gas thermal resistance in the crackle is high descends by a wide margin. The utility model discloses simple structure, make simply, heat transfer performance is excellent, the security is high, stability is high, applicable in multiple scenes such as millet electricity/surplus electric heating heat-retaining system that can regenerate, solar photo-thermal heat-retaining system, use extensively.

Description

Immersed solid heat reservoir

Technical Field

The utility model relates to an submergence formula solid heat reservoir belongs to solid heat-retaining technical field.

Background

Off-peak electricity, solar energy, industrial waste heat and the like are all intermittent energy sources, the energy sources are stored in a heat storage mode and are utilized when needed, the relation between uncoordinated energy supply and energy consumption in a heat energy utilization system can be effectively balanced, the mismatching of heat energy supply and demand parties in time and strength is relieved, unreasonable energy utilization is avoided, and the energy utilization rate is improved. From the perspective of energy safety, heat storage is work related to basic civilian life and is an important link for guaranteeing energy safety.

Among the numerous heat storage technologies, solid heat storage systems are one of the important technical routes, where solid heat storage is a key device. At present, most solid heat reservoirs adopt a mode of pipe burying in a solid heat storage material, a metal heat exchange pipeline is combined with the heat storage material, but because the expansion coefficients of the metal material and the heat storage material are inconsistent, the heat storage material and the pipeline are easy to generate cracks in the operation process of the heat reservoir, so that the problem of low heat exchange efficiency is caused, and the pipeline is broken and heat transfer working media are leaked even caused in severe cases. Therefore, the research on the solid heat storage device with high safety is of great significance to the commercial application of the solid heat storage system.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is heat transfer pipeline and the inconsistent equipment crackle and the poor scheduling problem of heat transfer effect that leads to of heat-retaining material expansion coefficient.

In order to solve the technical problem, the technical scheme of the utility model is to provide an immersed solid heat reservoir, which is characterized by comprising a metal box body, a solid heat storage material and a buffer layer; the solid heat storage material penetrates through the inside of the heat exchange device to form heat exchange through holes, and the heat exchange through holes are arranged at a certain distance to form row holes; the row holes are places where heat transfer working media and the solid heat storage materials exchange heat; the solid heat storage materials with certain sizes and provided with the row holes form a heat storage unit, and all the heat storage units are stacked in the vertical and horizontal directions to form a solid heat storage module; a heat transfer medium inlet pipe is arranged on one side of the metal box body, and a heat transfer medium outlet pipe is arranged on the other side of the metal box body; the inlet pipe and the outlet pipe both penetrate through the shell of the metal box body; a buffer layer is arranged between the solid heat storage module and the metal box body and used for preventing a heat transfer medium from passing through a gap between the metal box body and the heat storage module in a short circuit mode and effectively reducing damage and cracks of the heat storage unit caused by external vibration.

Wherein, the filter is arranged on the heat transfer medium outlet pipe.

When the solid heat reservoir stores heat, high-temperature heat transfer working medium flows into the heat reservoir from the inlet pipe to heat the heat storage module, and then flows out after passing through the outlet pipe and the filter; when the solid heat reservoir releases heat, low-temperature heat transfer working medium flows into the heat reservoir from the inlet pipe, absorbs the heat of the heat storage module, and then flows out after passing through the outlet pipe and the filter.

Wherein, the outer wall of the metal box body is provided with a heat preservation layer.

When the solid heat reservoir works, the heat transfer working medium is directly contacted with the solid heat storage material, and the solid heat storage module is immersed.

Wherein the solid heat reservoir is horizontally or vertically arranged;

wherein the solid heat storage material is concrete, rock or ceramic;

wherein, the metal box body is a sealed container.

Wherein the heat transfer medium is heat transfer oil or silicone oil.

By adopting the above scheme, the beneficial effects of the utility model are that:

(1) the heat transfer working medium in the utility model directly contacts with the solid heat storage material through the internal through hole for heat exchange, compared with the metal pipeline generally adopted in the prior art, the design can effectively avoid the problems of easy crack generation and the like caused by the inconsistent expansion coefficients of the metal heat exchange pipe and the heat storage material, and simultaneously, the equipment investment cost of the solid heat storage system is greatly reduced;

(2) the solid heat storage material in the utility model is immersed in the heat transfer working medium, even if the system generates cracks after long-time operation, the cracks can be filled with the heat transfer working medium, thereby effectively avoiding the problem that the heat exchange effect of the solid heat storage material is greatly reduced due to high gas thermal resistance in the cracks;

(3) the utility model discloses the design of outlet pipe department filter can get rid of and mix the solid heat-retaining material granule that flows out in heat transfer working medium, avoids its damage to follow-up equipment such as pumps.

Drawings

Fig. 1 is a schematic view of an immersed solid heat reservoir provided by an embodiment of the present invention;

fig. 2 is a cross-sectional view of a submerged solid heat reservoir according to an embodiment of the present invention;

reference numerals: 1. an inlet pipe; 2. a solid heat storage module; 3. a heat exchange through hole; 4. a filter; 5. a buffer layer; 6. a metal box body; 7. a heat-insulating layer; 8. an outlet pipe.

Detailed Description

The following describes the technical solution of the present invention in detail with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The structure of the device of the utility model is shown in figure 1, which comprises a metal box body 6, a solid heat storage material, a filter 4, a buffer layer 5 and a heat preservation layer 7; the solid heat storage material is internally penetrated to form heat exchange through holes 3, and the heat exchange through holes 3 are arranged at a certain distance to form row holes; the row holes are places where heat transfer working media and the solid heat storage materials exchange heat; the solid heat storage materials with certain sizes and provided with the row holes form a heat storage unit, and all the heat storage units are stacked in the vertical and horizontal directions to form a solid heat storage module 2; a buffer layer 5 is arranged between the solid heat storage module 2 and the metal box body 6 and is used for preventing a heat transfer medium from passing through a gap between the box body and the heat storage module in a short circuit manner and effectively reducing damage and cracks of a heat storage unit caused by external vibration; the outer wall of the metal box body 6 is provided with a heat insulation layer 7 for reducing heat loss; a heat transfer medium inlet pipe 1 is arranged on one side of the metal box body 6, and a heat transfer medium outlet pipe 8 and a filter 4 are arranged on the other side of the metal box body, so that small-particle heat storage materials are prevented from entering working media; the inlet pipe 1 and the outlet pipe 8 both penetrate through the shell of the metal box body 6.

Taking a horizontal solid heat storage device with the heat storage capacity of 1MWh as an example, the horizontal solid heat storage device is 6m long, 1m wide and 1.8m high, concrete is adopted as a solid heat storage material, and the horizontal solid heat storage device comprises 12 heat storage units with the length, width and height of 0.923 multiplied by 0.972 multiplied by 0.81m 3; the heat storage units are stacked in height and length, finally forming a solid heat storage module 2 of length 5.492m, width 0.972m and height 1.62 m; the diameter of the heat exchange through holes 3 in the heat storage unit is 0.02m, the heat exchange through holes are arranged at the interval of horizontal and vertical holes of 0.027m, and the number of cross-sectional holes is 540; the working temperature of the solid heat reservoir is 150-:

heat storage: high-temperature heat conducting oil flows in from an inlet pipe 1 at the left end of the solid heat reservoir, is shunted to enter a heat exchange through hole 3 in the solid heat storage module 2 and heats the solid heat storage module 2, stores heat in the solid heat storage material, and flows out from an outlet pipe 8 at the right end of the solid heat reservoir after being converged at the tail end of the solid heat storage module 2; the cooled heat conducting oil is filtered by the filter 4 and then flows back to the heating module of the system. When the temperature of the solid heat storage module 2 rises to 300 ℃, the heat storage is finished.

Heat release: the low-temperature heat conducting oil flows in from the inlet pipe 1 at the left end of the solid heat reservoir, is shunted to enter the heat exchange through holes 3 in the solid heat storage module 2 and absorbs the heat in the solid heat storage module 2, and flows out from the outlet pipe 8 at the right end of the solid heat reservoir after being converged at the tail end of the solid heat storage module 2; the heated heat conducting oil is filtered by the filter 4 and then flows into the heat exchanger to convey heat to the user side. When the temperature of the solid heat storage module 2 is reduced to 150 ℃, the heat release is finished.

The utility model provides an submergence formula solid heat reservoir, simple structure, make simple and easy, heat transfer performance is excellent, the security is high, stability is high. The heat transfer working medium directly contacts with the solid heat storage material through the internal heat exchange through holes 3 for heat exchange, and compared with a metal pipeline commonly adopted in the prior art, the design can effectively avoid the problems that the expansion coefficients of the metal heat exchange pipe and the heat storage material are inconsistent, so that cracks are easy to generate, and the like, and meanwhile, the equipment investment cost of the solid heat storage system is greatly reduced. Furthermore, the utility model provides a solid heat-retaining material submergence is in heat transfer working medium, even the system produces the crackle after long-time operation, also can be filled up by heat transfer working medium in the crackle, has effectively avoided the problem that the heat transfer effect that solid heat-retaining material caused because of the gas thermal resistance in the crackle is high descends by a wide margin. Meanwhile, the design of the filter 4 at the outlet pipe 8 of the heat reservoir can remove concrete slag mixed in the heat-conducting oil and avoid the damage of the concrete slag to equipment such as a pump.

Finally, it should be noted that: the present invention is not limited to the above-mentioned examples, and the equivalent structure or equivalent flow conversion made by the contents of the specification and the drawings of the present invention, or directly or indirectly applied to other related technical fields, are all included in the same principle in the protection scope of the present invention.

Claims

1. The immersed solid heat reservoir is characterized by comprising a metal tank body, a solid heat storage material and a buffer layer; the solid heat storage material penetrates through the inside of the heat exchange device to form heat exchange through holes, and the heat exchange through holes are arranged at a certain distance to form row holes; the row holes are places where heat transfer working media and the solid heat storage materials exchange heat; the solid heat storage materials with certain sizes and provided with the row holes form a heat storage unit, and all the heat storage units are stacked in the vertical and horizontal directions to form a solid heat storage module; a heat transfer medium inlet pipe is arranged on one side of the metal box body, and a heat transfer medium outlet pipe is arranged on the other side of the metal box body; the inlet pipe and the outlet pipe both penetrate through the shell of the metal box body; a buffer layer is arranged between the solid heat storage module and the metal box body and used for preventing a heat transfer medium from passing through a gap between the metal box body and the heat storage module in a short circuit mode and effectively reducing damage and cracks of the heat storage unit caused by external vibration.

2. The submerged solid heat reservoir of claim 1, further comprising a filter disposed on the heat transfer medium outlet pipe.

3. The immersed solid heat reservoir of claim 2, wherein when the solid heat reservoir stores heat, a high-temperature heat transfer working medium flows into the heat reservoir from the inlet pipe to heat the heat storage module, and then flows out after passing through the outlet pipe and the filter; when the solid heat reservoir releases heat, low-temperature heat transfer working medium flows into the heat reservoir from the inlet pipe, absorbs the heat of the heat storage module, and then flows out after passing through the outlet pipe and the filter.

4. The submerged solid heat reservoir of claim 1, wherein the outer wall of the metal tank is provided with an insulating layer.

5. The submerged solid heat reservoir of claim 1, wherein the heat transfer medium is in direct contact with the solid heat storage material to submerge the solid heat storage module when the solid heat reservoir is in operation.

6. The submerged solid heat reservoir of claim 1, wherein the solid heat reservoir is in a horizontal or vertical arrangement.

7. The submerged solid heat reservoir of claim 1, wherein the solid heat storage material is concrete, rock or ceramic.

8. The submerged solid heat reservoir of claim 1, wherein the metal tank is a sealed vessel.

9. The submerged solid heat reservoir of claim 1, wherein the heat transfer medium is a thermal oil or silicone oil.