Self-heating type fused salt storage box for photo-thermal power generation

Abstract

The utility model relates to a self-heating type fused salt storage tank for photo-thermal power generation, which solves the problem that the existing fused salt storage tank cannot realize self-heating. Comprising a box body and a box cover, the box body comprises a shell, a heat preservation wall and a heat preservation base, the heat preservation wall and the heat preservation base are arranged in the shell, a heating device for heating fused salt in the box body is arranged on the heat preservation base, a solar panel is laid on the box cover and supplies power to the heating device, and a temperature control system for controlling the heating device to work is arranged on the heat preservation wall. The heating device is further connected with a photo-thermal power generation circulating power supply system, a fused salt inlet is formed in the box cover, and a fused salt outlet is formed in the bottom of the box body. During use, the solar panel converts light energy into electric energy to supply power to the heating device, a self-heating function is achieved, the heat preservation wall and the heat preservation base conduct heat preservation, when the temperature of fused salt is not enough, power can be supplied through the photo-thermal power generation circulation power supply system, and the temperature control system automatically controls the temperature of the heating device to be heated to the target temperature. And the temperature in the whole box body is kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of photothermal heat storage or power generation, and in particular to a self-heating molten salt storage tank for photothermal power generation. Background Art

[0002] In the configuration of the heat storage system in the solar thermal power generation project, the molten salt storage tank heats the molten salt medium, stores it at a specified temperature, and then outputs it through the heat exchanger for heat conversion, recovers the heat energy, and circulates it back and forth to provide energy for petrochemical enterprises and other modules that require production capacity, thereby achieving energy conservation, consumption reduction and emission reduction in the industrial production of petrochemical energy, and truly realizing the recycling of new energy.

[0003] As a renewable energy source, solar energy can effectively reduce carbon dioxide emissions. In particular, my country's northwest region has unique geographical advantages and sufficient sunshine time. How to apply solar energy to molten salt storage tanks has become an urgent problem to be solved. Utility Model Content

[0004] The utility model aims to solve the problem that the existing molten salt storage tank cannot realize self-heating.

[0005] The technical solution adopted to solve the technical problems raised by the utility model is as follows: the self-heating molten salt storage box for photothermal power generation of the utility model includes a box body and a box cover, the box body includes an outer shell and an insulation wall and an insulation base arranged in the outer shell, the insulation base is arranged at the bottom of the outer shell, the insulation wall is arranged in contact with the outer surface of the side wall of the outer shell, the insulation base is provided with a heating device for heating the molten salt in the box body, the box cover is laid with solar panels, the solar panels supply power to the heating device, the insulation wall is provided with a temperature control system for controlling the operation of the heating device, the heating device is also connected to the photothermal power generation cycle power supply system, the box cover is provided with a molten salt inlet, and the bottom of the box body is provided with a molten salt outlet.

[0006] The technical solutions further defining the utility model include:

[0007] The insulation wall comprises an inner insulation wall and an outer insulation wall, both of which are cast in two sections by insulation material, and both of which comprise a first casting layer and a second casting layer, with a shrinkage joint between the first casting layer and the second casting layer.

[0008] The first pouring layer and the second pouring layer are provided with a first step and a second step which cooperate with each other.

[0009] The thermal insulation material is high chromium thermal insulation material.

[0010] The heat-insulating base comprises a heat-insulating layer arranged at the bottom of the shell and a heat-resistant layer arranged on the heat-insulating layer, and the heating device is arranged on the heat-resistant layer.

[0011] The heat insulation layer is a perlite heat insulation brick layer, and the heat-resistant layer is a heat-resistant brick layer.

[0012] The heating device is a heating resistance wire.

[0013] The molten salt outlet is provided with an outlet molten salt fluid pump, and the molten salt inlet is provided with an inlet molten salt fluid pump.

[0014] The outlet molten salt fluid pump and the inlet molten salt fluid pump are both connected to the solar panels.

[0015] The shell is made of metal material.

[0016] Through the above technical scheme, the beneficial effects of the utility model are as follows: the self-heating molten salt storage box body and box cover for solar thermal power generation of the utility model include a shell and a heat-insulating wall and a heat-insulating base arranged in the shell, the heat-insulating base is arranged at the bottom of the shell, the heat-insulating wall is arranged in contact with the outer surface of the side wall of the shell, the heat-insulating base is provided with a heating device for heating the molten salt in the box body, the box cover is paved with solar panels, the solar panels are used to power the heating device, the box cover is provided with a molten salt inlet, and the bottom of the box body is provided with a molten salt outlet. When in use, the solar panels convert light energy into electrical energy to power the heating device, realizing the self-heating function, the heat-insulating wall and the heat-insulating base are used for heat preservation, and when the molten salt temperature is not enough, it can be powered by the solar thermal power generation cycle power supply system, and the temperature control system automatically controls the temperature of the heating device to heat to the target temperature, so as to keep the temperature in the whole box stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a self-heating molten salt storage tank for photothermal power generation. DETAILED DESCRIPTION

[0018] The structure of the utility model is further described below in conjunction with the accompanying drawings.

[0019] Reference Figure 1A self-heating molten salt storage tank for solar thermal power generation includes a box body 1 and a box cover 2. The box body 1 includes an outer shell 11 and an insulation wall 12 and an insulation base 13 arranged in the outer shell. The insulation base is arranged at the bottom of the outer shell, and the insulation wall is arranged in contact with the outer surface of the side wall of the outer shell. A heating device 3 for heating the molten salt 8 in the box body is arranged on the insulation base. A solar panel 4 is laid on the box cover. The solar panel supplies power to the heating device. A temperature control system 5 for controlling the operation of the heating device is arranged on the insulation wall. A molten salt inlet 21 is arranged on the box cover 2, and a molten salt outlet 14 is arranged at the bottom of the box body 1. The solar panel converts light energy into electrical energy to supply power to the heating device, realizing the self-heating function. The insulation wall and the insulation base are insulated. When the molten salt temperature is not enough, it can be powered by the solar thermal power generation cycle power supply system. The temperature control system automatically controls the temperature of the heating device to heat to the target temperature, keeps the temperature in the entire box stable, and ensures that the temperature of the molten salt at the bottom of the box is consistent with the temperature of the molten salt flowing into the molten salt inlet, without energy loss.

[0020] In this embodiment, the molten salt outlet 14 is provided with an outlet molten salt fluid pump 6, and the molten salt inlet 21 is provided with an inlet molten salt fluid pump 7. The inlet molten salt fluid pump pumps the high-temperature molten salt into the box, and the outlet molten salt fluid pump pumps the high-temperature molten salt into the rear system to realize the self-circulation flow of the molten salt, so as to better exchange heat in the system. In this embodiment, the outlet molten salt fluid pump and the inlet molten salt fluid pump are both connected to the solar panels. The laid solar panels are evenly laid on the box cover, making full use of the sunlight resources in its working environment to power the bottom heating device in the box, and can also provide electricity for other aspects such as surrounding civil air defense projects, outlet molten salt fluid pumps, and inlet molten salt fluid pumps. The outlet molten salt fluid pump and the inlet molten salt fluid pump can also be powered by a solar thermal power generation circulation system.

[0021] In this embodiment, the insulation wall 12 includes an inner insulation wall 121 and an outer insulation wall 122, and both the inner insulation wall and the outer insulation wall are cast in two sections by insulation materials, and both the inner insulation wall and the outer insulation wall include a first casting layer 1211 and a second casting layer 1212, and a contraction joint 1213 is provided between the first casting layer and the second casting layer. The inner insulation wall 121 and the outer insulation wall 122 are cast in two sections, and a contraction joint is reserved between the two ends so that the insulation wall can expand freely. The first casting layer and the second casting layer are provided with a first step 12111 and a second step 12121 that cooperate with each other. The first casting layer and the second casting layer adopt an anisotropic casting matching method to avoid leakage of molten salt in the box due to the reserved expansion joint, which will cause corrosion to the outer shell.

[0022] In this embodiment, the insulation material is a high-chromium insulation material. The high-chromium insulation material has good casting molding, good hardness, corrosion resistance and good insulation effect. In this embodiment, the shell is a metal material. Carbon structural steel Q235-B can be used, and metal materials such as stainless steel can also be used in specific implementation.

[0023] In this embodiment, the heat-insulating base 13 includes a heat-insulating layer 131 disposed at the bottom of the shell and a heat-resistant layer 132 disposed on the heat-insulating layer, and the heating device is disposed on the heat-resistant layer.

[0024] The heat insulation layer is a perlite heat insulation brick layer, and the heat resistant layer is a heat resistant brick layer. The heating device 3 is a heating resistance wire. A layer of perlite heat insulation bricks is first laid on the bottom of the shell, and then a layer of heat resistant rotor is laid. Because the temperature difference between the inlet molten salt temperature and the outlet molten salt temperature is large, the bottom insulation is thickened, and a heating resistance wire is installed on the heat resistant rotor to heat to the target temperature when the temperature is not enough.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0029] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the protection scope of the utility model. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still belong to the protection scope of the utility model.

Claims

1. A self-heating molten salt storage tank for solar thermal power generation, comprising a tank body and a tank cover, characterized in that: The box body includes an outer shell and an insulation wall and an insulation base arranged in the outer shell. The insulation base is arranged at the bottom of the outer shell, and the insulation wall is arranged in contact with the outer surface of the side wall of the outer shell. The insulation base is provided with a heating device for heating the molten salt in the box body. The box cover is covered with solar panels, and the solar panels supply power to the heating device. The insulation wall is provided with a temperature control system for controlling the operation of the heating device. The heating device is also connected to the solar thermal power generation cycle power supply system. The box cover is provided with a molten salt inlet, and the bottom of the box body is provided with a molten salt outlet.

2. A self-heating molten salt storage tank for solar thermal power generation according to claim 1, characterized in that: The insulation wall comprises an inner insulation wall and an outer insulation wall, both of which are cast in two sections by insulation material, and both of which comprise a first casting layer and a second casting layer, with a shrinkage joint between the first casting layer and the second casting layer.

3. A self-heating molten salt storage tank for solar thermal power generation according to claim 2, characterized in that: The first pouring layer and the second pouring layer are provided with a first step and a second step which cooperate with each other.

4. A self-heating molten salt storage tank for solar thermal power generation according to claim 2, characterized in that: The thermal insulation material is high chromium thermal insulation material.

5. A self-heating molten salt storage tank for solar thermal power generation according to claim 1, characterized in that: The heat-insulating base comprises a heat-insulating layer arranged at the bottom of the shell and a heat-resistant layer arranged on the heat-insulating layer, and the heating device is arranged on the heat-resistant layer.

6. A self-heating molten salt storage tank for solar thermal power generation according to claim 5, characterized in that: The heat insulation layer is a perlite heat insulation brick layer, and the heat-resistant layer is a heat-resistant brick layer.

7. A self-heating molten salt storage tank for solar thermal power generation according to claim 1, characterized in that: The heating device is a heating resistance wire.

8. A self-heating molten salt storage tank for solar thermal power generation according to claim 1, characterized in that: The molten salt outlet is provided with an outlet molten salt fluid pump, and the molten salt inlet is provided with an inlet molten salt fluid pump.

9. A self-heating molten salt storage tank for solar thermal power generation according to claim 8, characterized in that: The outlet molten salt fluid pump and the inlet molten salt fluid pump are both connected to the solar panels.

10. A self-heating molten salt storage tank for solar thermal power generation according to claim 1, characterized in that: The shell is made of metal material.

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