CN215413331U

CN215413331U - Multi-wall heat storage tank device

Info

Publication number: CN215413331U
Application number: CN202121812413.1U
Authority: CN
Inventors: 许世森; 郑建涛; 徐越; 杨剑; 田仲伟
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Clean Energy Research Institute
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2022-01-04
Anticipated expiration: 2031-08-04

Abstract

The utility model discloses a multi-wall heat storage tank device which comprises a molten salt inner tank, wherein a molten salt outer tank is arranged on the outer side of the molten salt inner tank, a heat insulation chamber is arranged between the molten salt inner tank and the molten salt outer tank, a molten salt heat insulation shell is arranged on the outer side of the molten salt outer tank, a molten salt outer tank heat insulation layer is arranged between the molten salt outer tank and the molten salt heat insulation shell, and a plurality of electric heaters are obliquely inserted into the molten salt inner tank from the molten salt heat insulation shell. The utility model can reduce heat dissipation loss and heat consumption.

Description

Multi-wall heat storage tank device

Technical Field

The utility model belongs to the field of heat energy engineering and new energy heat utilization, relates to a high-efficiency low-heat-loss heat storage and heat accumulation device, and particularly relates to a multi-wall heat storage tank device.

Background

The molten salt has the obvious characteristics of large heat capacity, high stability and high working temperature, is a heat transfer and storage medium for energy-saving utilization of industrial waste heat and heat storage and power generation of renewable energy sources, and is used for energy transfer and conversion. The method is characterized in that energy such as solar energy and high-temperature waste heat is stored and utilized by using molten salt, the generated superheated steam is used for generating power and providing the power for a heat user after heat exchange is carried out by a heat exchanger, and a molten salt tank is a storage tank specially used for preserving heat of molten salt. When the existing molten salt tank flows in high-temperature molten salt, the liquid distribution device arranged in the middle of the tank body is adopted to uniformly disperse the molten salt in the molten salt tank. Because the temperature of the molten salt is generally higher and can reach 550-600 ℃, if the environment temperature is lower, the heat loss is larger and is generally 90-120W/m². The heat loss is about 0.5% in 24 hours, and when the heat storage tank is operated for a long time and a long period, heat needs to be continuously supplemented to keep a certain temperature, while the molten salt is generally high in temperature, large in capacity and long in heat storage time, so that the heat storage tank is large in volume, the diameter of some heat storage tanks reaches 39 meters, the height of some heat storage tanks is 15-17 meters, the heat dissipation surface area is large, and the conventional large-capacity heat storage tank is of a single-layer structure, so that the heat dissipation loss is large, and the energy waste is serious. Therefore, it is important to design a heat storage device that can be maintained for several months and has large-scale and large capacity.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a multi-wall heat storage tank device.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a multiwall heat storage tank device, includes the fused salt inner tank, the outside of fused salt inner tank is provided with the outer jar of fused salt, and is provided with thermal-insulated cavity between the outer jar of fused salt inner tank and fused salt, the outside of fused salt outer tank is provided with fused salt lagging casing, and is provided with the outer jar of heat preservation of fused salt between outer jar of fused salt and the fused salt lagging casing, still includes a plurality of electric heaters, electric heater inserts the fused salt inner tank from the slope of fused salt lagging casing.

Further, still include the inside lining, the inside lining setting is inboard at the fused salt inner tank, and is provided with fire-resistant insulation material between inside lining and the fused salt inner tank, electric heater inserts the inside lining from the slope of fused salt heat preservation shell.

Further, a plurality of temperature measuring points are arranged on the molten salt outer tank and connected to the electric heater through a temperature control system.

Furthermore, a vacuum pipeline penetrating into the heat insulation cavity is arranged on the fused salt outer tank and the fused salt heat insulation shell, and the end part of the vacuum pipeline is connected with a vacuum pump.

Further, an interlayer pressure instrument for measuring the pressure of the heat insulation cavity is arranged on the fused salt heat insulation shell and connected to the vacuum pump through a pressure control system.

Further, the vacuum pump adopts a water ring vacuum pump or a water/steam jet ejector.

Further, the molten salt inner tank and the molten salt outer tank are connected through a plurality of inner and outer pipe support columns.

Furthermore, the number of the inner and outer pipe supporting columns is more than or equal to 3 in the vertical direction, and more than or equal to 3 in the circumferential direction.

Further, the molten salt inner tank and the molten salt outer tank are made of steel, concrete materials, polyethylene storage tanks, polypropylene storage tanks or glass fiber reinforced plastics.

Compared with the prior art, the utility model has the following beneficial technical effects:

the utility model utilizes the interlayer cavity between the inner fused salt tank and the outer fused salt tank, and arranges the heat insulation gas such as vacuum or nitrogen gas, which can reduce the heat dissipation loss and reduce the heat consumption.

Furthermore, the temperature is regulated and controlled by arranging the temperature measuring point and the electric heater in a matched manner.

Furthermore, the vacuum pump and the interlayer pressure instrument are linked with relevant equipment to maintain the interlayer pressure so as to maintain the heat preservation effect.

Furthermore, the inner tank and the outer tank of the molten salt are supported by the inner tank and the outer tank of the molten salt.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.

FIG. 1 is a schematic view of the apparatus of the present invention;

fig. 2 is a top view of fig. 1.

The system comprises an inner lining, 2 refractory heat-preservation materials, 3 a molten salt inner tank, 4 a heat-insulation chamber, 5 a molten salt outer tank, 6 a molten salt heat-preservation shell, 7 an electric heater, 8 a vacuum pipeline, 9 a vacuum pump, 10 a temperature measuring point, 11 an interlayer pressure instrument, 12 an inner tank support column, an outer tank support column, 13 and a molten salt outer tank heat-preservation layer.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, in the multi-wall heat storage tank device, the inside of a molten salt inner tank 3 is in contact with a fireproof heat insulation material 2, and the inside of the fireproof heat insulation material 2 is in contact with an inner lining 1 made of stainless steel. The cladding in the 4 outside of outer jar of fused salt has outer jar heat preservation 13 of fused salt and fused salt lagging casing 6, and electric heater 7 (explosion-proof) is installed on outer jar 5 of heat-retaining, extends inside lining 1, and outer jar of support column 12 connection fused salt inner tank 3 and fused salt outer jar 5 play the supporting role. Between the inner molten salt tank 3 and the outer molten salt tank 5 is a heat insulation chamber 4. And the temperature measuring point 10 is welded and installed on the molten salt outer tank 5. The vacuum pipe 6 extends to the insulated chamber 4 and is connected to a vacuum pump 9. The vacuum pump 9 is connected to the interlayer pressure gauge 11.

In the utility model, a heat insulation chamber 4 is arranged between the molten salt inner tank 3 and the molten salt outer tank 5, and can be in a vacuum state or filled with heat insulation gas such as nitrogen, argon and the like with certain pressure; the molten salt inner tank 3 and the molten salt outer tank 55 can be made of steel, concrete or other materials such as a polyethylene storage tank, a polypropylene storage tank, glass fiber reinforced plastics and the like, the lining 1 can be arranged or not arranged, the vacuum pump 9 can be a water ring vacuum pump or a gas vacuumizing device such as a water/steam jet air extractor and the like, the vacuum pump 9 is controlled by the interlayer pressure, the interlayer pressure is maintained to be a set value, specifically, the pressure value is detected by an interlayer pressure instrument 11 and fed back to the vacuum pump 9 through a pressure control system; the inner and outer tank support columns 12 are arranged in 3 or more than 3 along the circumferential direction, 3 or more than 3 layers can be arranged along the vertical direction, the heat storage medium can be fused salt, heat conduction oil, water and other heat storage fluids, and heat compensation or condensation prevention is carried out by arranging the electric heater 7.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a multiwall heat-retaining jar device, its characterized in that, includes fused salt inner tank (3), the outside of fused salt inner tank (3) is provided with fused salt outer tank (5), and is provided with thermal-insulated cavity (4) between fused salt inner tank (3) and fused salt outer tank (5), the outside of fused salt outer tank (5) is provided with fused salt heat preservation shell (6), and is provided with fused salt outer tank heat preservation (13) between fused salt outer tank (5) and fused salt heat preservation shell (6), still includes a plurality of electric heater (7), electric heater (7) insert fused salt inner tank (3) from fused salt heat preservation shell (6) slope.

2. The multi-walled heat storage tank device according to claim 1, further comprising an inner liner (1), wherein the inner liner (1) is disposed inside the molten salt inner tank (3), and a refractory insulating material (2) is disposed between the inner liner (1) and the molten salt inner tank (3), and the electric heater (7) is obliquely inserted into the inner liner (1) from the molten salt insulating outer shell (6).

3. The multi-walled heat storage tank arrangement according to claim 1, characterized in that the outer molten salt tank (5) is provided with temperature measuring points (10), which temperature measuring points (10) are connected to an electric heater (7) by a temperature control system.

4. The multi-walled heat storage tank device according to claim 1, characterized in that the molten salt outer tank (5) and the molten salt heat preservation shell (6) are provided with vacuum pipes (8) penetrating into the heat insulation chamber (4), and the ends of the vacuum pipes (8) are connected with vacuum pumps (9).

5. The multi-walled heat storage tank arrangement according to claim 4, characterized in that a sandwich pressure gauge (11) for measuring the pressure of the insulated chamber (4) is arranged on the molten salt insulated housing (6), the sandwich pressure gauge (11) being connected to a vacuum pump (9) by a pressure control system.

6. The multiwall heat storage tank apparatus of claim 4, wherein the vacuum pump (9) is a water ring vacuum pump or a water/steam jet ejector.

7. A multi-walled heat storage tank arrangement according to claim 1, characterized in that the inner molten salt tank (3) and the outer molten salt tank (5) are connected by means of inner and outer pipe support columns (12).

8. The multi-walled heat storage tank device of claim 7 wherein the inner and outer tube support columns (12) are vertically more than or equal to 3 layers and circumferentially more than or equal to 3.

9. The multi-walled heat storage tank arrangement according to claim 1, characterized in that the molten salt inner tank (3) and the molten salt outer tank (5) are made of steel, concrete material, polyethylene storage tank, polypropylene storage tank or glass fiber reinforced plastic.