CN207350948U - Solar energy optical-thermal offset-type fused salt heat-accumulation type hot bellows - Google Patents

Abstract

The embodiment of the utility model provides a solar thermal compensation type molten salt heat storage type hot air box, including: a heat storage circuit, a hot air box circuit, and a solar thermal compensation circuit; the heat storage circuit includes an electric heat storage molten salt storage circuit Hot tank, high temperature molten salt pump, hot air box, solar photothermal molten salt heat storage tank; wherein the hot air box circuit includes a hot air box, and a circulating fan for circulating heating is installed on the hot air box; wherein the solar heat compensation circuit Including solar thermal molten salt heat storage tank, low temperature molten salt pump, solar thermal collector; among them, the closed solar thermal compensation formed by solar thermal molten salt thermal storage tank, low temperature molten salt pump and solar thermal collector circuit.

Description

Solar photothermal compensation type molten salt heat storage type hot air box

technical field

The utility model relates to the field of energy technology, in particular to a solar photothermal compensation type molten salt heat storage hot air box.

Background technique

Coal has always been the main way of obtaining energy for human society. However, with the increasing depletion of coal resources and the serious emission of coal combustion caused by cutting corners in the process, large-scale coal-to-electricity projects have been carried out in China. With the development of society, the electricity consumption increases sharply during the peak period, while the electricity consumption decreases a lot during the trough period at night. Due to the huge gap between peak and valley power consumption, power is insufficient during peak hours, and generator sets must operate inefficiently during underestimated time periods; although many peak-shaving power plants have been built in the power network, the efficiency is still not high. Now the power industry generally requires the adoption of "peak shaving and valley filling" measures, such as the use of peak and valley electricity prices to encourage underestimation of time period electricity consumption.

In order to solve the problem of energy depletion, various solar technologies are now widely used, and the most common existing solar technologies are: photothermal conversion and photoelectric conversion. However, various peak-shaving and valley-filling technologies in the prior art cannot cooperate with solar energy technology.

Utility model content

Aiming at the problem that peak-shaving and valley-filling technology cannot be combined with solar energy technology in the prior art, the purpose of the embodiment of the utility model is to provide an effective and efficient solar photothermal compensation type molten salt heat storage hot air box.

In order to solve the above problems, the embodiment of the utility model proposes a solar thermal compensation type molten salt heat storage type hot air box, including: a heat storage circuit, a hot air box circuit, and a solar thermal compensation circuit;

The heat storage circuit includes an electric heat storage molten salt heat storage tank 1, a high temperature molten salt pump 2, a hot air box 3, and a solar photothermal molten salt heat storage tank 7; wherein the electric heat storage molten salt heat storage tank 1, the high temperature melting The closed heat storage circuit formed by the salt pump 2, the hot air box 3, and the solar photothermal molten salt heat storage tank 7; wherein the tube side inlet of the hot air box 3 is respectively connected to the solar photothermal molten salt heat storage tank 7 inlet, and through the high temperature melting The salt pump 2 is connected to the electric heat storage molten salt heat storage tank 1; and the outlet of the tube side of the hot air box 3 is connected to the outlet of the solar photothermal molten salt heat storage tank 7 through the molten salt outlet pipeline; wherein the electric heat storage molten salt storage A molten salt electric heater 10 is provided in the heat tank 1, and a molten salt electric heater 70 is also provided in the solar photothermal molten salt heat storage tank 7;

Wherein said hot air box circuit comprises a hot air box 3, on which a circulating fan 4 for circulation heating is installed;

Wherein the solar thermal compensation circuit includes a solar photothermal molten salt thermal storage tank 7, a low temperature molten salt pump 6, a solar thermal collector 5; wherein a solar thermal molten salt thermal storage tank 7, a low temperature molten salt pump 6, a solar thermal The closed solar heat compensation loop formed by the photothermal heat collector 5.

Among them, a controller 8 is also included, and the controller 8 is respectively connected with the heat storage circuit, the hot air box circuit, and the solar compensation circuit to control the entire system to perform the following operations: pass through the electric heat storage molten salt heat storage tank 1 during the valley section electricity consumption time The inner molten salt heater 10 heats the low-temperature molten salt in the tank into high-temperature molten salt; part of the high-temperature molten salt enters the hot air box 3 for heating, and the other part is stored in the electric heat storage molten salt heat storage tank 1 for energy storage; And during the peak power consumption time, the high-temperature molten salt used for energy storage in the electric heat storage molten salt heat storage tank 1 is transported into the hot air box 3 for heat supply. After the high-temperature molten salt is heated in the heat exchanger 3, it becomes a low-temperature molten salt, and the low-temperature molten salt is transported to the solar thermal molten salt heat storage tank 7, so that the low temperature molten salt For salt heating, the medium-temperature molten salt is transported to the solar photothermal molten salt heat storage tank 7, and then to the electric heat storage molten salt heat storage tank 1.

Wherein, the solar thermal collector 5 includes a trough parabolic reflector, a vacuum tube receiver, and a tracking device; wherein the tracking device is a rotating shaft so that the trough parabolic reflector fixed on the rotating shaft moves with the direction of sunlight, The vacuum tube receiver is arranged in the trough parabolic reflector.

Among them, in the heat storage circuit, the tube side inlet of the hot air box 3 is equipped with a water circuit system temperature sensor 22, a water circuit system pressure sensor 23, and a water circuit system flow sensor 24; A hot brine tank level gauge 11 for monitoring the liquid level and a temperature sensor 12 for monitoring the temperature are installed; a hot brine tank level gauge 31 for monitoring the liquid level and a temperature sensor 12 for monitoring the liquid level are installed on the solar photothermal molten salt heat storage tank 7 A temperature sensor 32 for monitoring the temperature. A hot salt pipeline temperature sensor 14 , a hot salt pipeline pressure sensor 15 , and a hot salt pipeline flow sensor 16 are installed on the pipeline between the electric heat storage molten salt heat storage tank 1 and the hot air box 3 . A hot salt pipeline temperature sensor 34 , a hot salt pipeline pressure sensor 35 , and a hot salt pipeline flow sensor 36 are installed on the pipeline between the hot air box 3 and the solar photothermal molten salt heat storage tank 7 .

Wherein, in the solar thermal compensation circuit, the hot salt pipeline temperature sensor 41, the hot salt pipeline pressure sensor 41, and the hot salt pipeline pressure Sensor 42, hot salt pipeline flow sensor 43, hot salt pipeline temperature sensor 44, hot salt pipeline pressure sensor 45, hot salt pipeline flow sensor 46.

Among them, a power supply 9 for powering the entire system is also included.

The beneficial effects of the above-mentioned technical solution of the utility model are as follows: the above-mentioned technical solution proposes a solar thermal compensation type molten salt heat storage hot air box, which can be used in When the electricity is low, the excess electricity is converted into thermal energy storage, and the stored heat is released for heating when the electricity consumption is at its peak. At the same time, the low-temperature molten salt is heated by solar energy. Making full use of solar energy, a clean and renewable energy, can not only reduce the production of enterprises It is an effective way to alleviate the peak-valley difference of the power grid.

Description of drawings

Figure 1 is a system structure diagram of a solar photothermal compensation type molten salt regenerative hot air box.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, the following will describe in detail with reference to the drawings and specific embodiments.

As shown in Figure 1, the embodiment of the utility model proposes a solar thermal compensation type molten salt heat storage type hot air box, including: a heat storage circuit, a hot air box circuit, and a solar thermal compensation circuit;

The heat storage circuit includes an electric heat storage molten salt heat storage tank 1, a high temperature molten salt pump 2, a hot air box 3, and a solar photothermal molten salt heat storage tank 7; wherein the electric heat storage molten salt heat storage tank 1, the high temperature melting The closed heat storage circuit formed by the salt pump 2, the hot air box 3, and the solar photothermal molten salt heat storage tank 7; wherein the tube side inlet of the hot air box 3 is respectively connected to the solar photothermal molten salt heat storage tank 7 inlet, and through the high temperature melting The salt pump 2 is connected to the electric heat storage molten salt heat storage tank 1; and the outlet of the tube side of the hot air box 3 is connected to the outlet of the solar photothermal molten salt heat storage tank 7 through the molten salt outlet pipeline; wherein the electric heat storage molten salt storage A molten salt electric heater 10 is provided in the heat tank 1, and a molten salt electric heater 70 is also provided in the solar photothermal molten salt heat storage tank 7;

Wherein said hot air box circuit comprises a hot air box 3, on which a circulating fan 4 for circulation heating is installed;

Wherein the solar thermal compensation circuit includes a solar photothermal molten salt thermal storage tank 7, a low temperature molten salt pump 6, a solar thermal collector 5; wherein a solar thermal molten salt thermal storage tank 7, a low temperature molten salt pump 6, a solar thermal The closed solar thermal compensation loop formed by the photothermal collector 5:

During the electricity consumption time in the valley section, the low-temperature molten salt (about 200°C) in the tank is heated to a high-temperature molten salt (about 500°C) by the molten salt heater 10 in the electric heat storage molten salt heat storage tank 1; Part of the high-temperature molten salt obtained after heating the molten salt heat storage tank 1 enters the hot air box 3 for heat supply, and the other part is stored in the electric heat storage molten salt heat storage tank 1 for energy storage. During the peak power consumption time, the high-temperature molten salt used for energy storage in the electric heat storage molten salt heat storage tank 1 is delivered to the hot air box 3 for heat supply. The high-temperature molten salt is turned into low-temperature molten salt after heating in the heat exchanger 3 , and the low-temperature molten salt is transported to the solar photothermal molten salt thermal storage tank 7 . Among them, the low-temperature molten salt is transported to the trough-type solar thermal collector 5 by the low-temperature molten salt pump 6, and the low-temperature molten salt (about 200°C) is heated to the medium-temperature molten salt (about 350°C), and the heated medium-temperature molten salt Go back to the solar photothermal molten salt heat storage tank 7 for storage, and complete a solar photothermal cycle. During the electricity consumption time in the valley section, the medium-temperature molten salt is transported to the electric heat storage molten salt heat storage tank 1 . This improves heating efficiency and reduces power consumption.

Wherein, a water circuit system temperature sensor 22, a water circuit system pressure sensor 23, and a water circuit system flow sensor 24 are installed on the tube side inlet of the hot air box 3; a molten salt circulating pump 25 is installed on the molten salt outlet pipeline.

The electric heat storage molten salt heat storage tank 1 is equipped with a hot salt tank liquid level gauge 11 for monitoring the liquid level and a temperature sensor 12 for monitoring the temperature, and an electric heat storage molten salt heat storage tank for emptying the molten salt is installed on the lower part Tank discharge port 13; the solar photothermal molten salt heat storage tank 7 is equipped with a hot salt tank liquid level gauge 31 for monitoring liquid level and a temperature sensor 32 for monitoring temperature, and an electric circuit for emptying molten salt is installed at the bottom. Salt discharge port 33 of heat storage molten salt heat storage tank.

A hot salt pipeline temperature sensor 14 , a hot salt pipeline pressure sensor 15 , and a hot salt pipeline flow sensor 16 are installed on the pipeline between the electric heat storage molten salt heat storage tank 1 and the hot fan 3 .

A hot salt pipeline temperature sensor 34 , a hot salt pipeline pressure sensor 35 , and a hot salt pipeline flow sensor 36 are installed on the pipeline between the hot air box 3 and the solar photothermal molten salt heat storage tank 7 .

A hot salt pipeline temperature sensor 41, a hot salt pipeline pressure sensor 42, and a hot salt pipeline flow sensor 43 are installed on all pipelines between the solar photothermal molten salt heat storage tank 7 and the solar photothermal heat collector 5; Hot salt pipeline temperature sensor 44, hot salt pipeline pressure sensor 45, hot salt pipeline flow sensor 46.

The thermal storage circuit includes all piping systems carrying molten salt, temperature sensors 14, 34 installed on the piping; pressure sensors 15, 35, and flow sensors 16, 36.

The hot air box circuit includes a temperature sensor 22 , a pressure sensor 23 , a flow sensor 24 , a molten salt circulation pump 25 , and a hot air box 3 installed on the piping system.

The solar thermal compensation circuit includes all piping systems carrying molten salt, on which temperature sensors 41, 44, pressure sensors 42, 45, and flow sensors 43, 46 are installed.

The solar photothermal compensation type molten salt heat storage type hot air box also includes a controller 8, which is respectively connected with the sensors and the power supply 9 of the heat storage circuit, the hot air box circuit, and the solar compensation circuit.

The foregoing is a preferred embodiment of the present utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the present utility model. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (6)

1. A solar photothermal compensation type molten salt regenerative hot air box, characterized in that it comprises: a heat storage circuit, a hot air box circuit, and a solar thermal compensation circuit; The heat storage circuit includes an electric heat storage molten salt heat storage tank, a high temperature molten salt pump, a hot air box, and a solar photothermal molten salt heat storage tank; wherein the electric heat storage molten salt heat storage tank, a high temperature molten salt pump, and a hot air box 1. A closed heat storage circuit formed by a solar photothermal molten salt heat storage tank; the tube side inlet of the hot air box is respectively connected to the inlet of the solar photothermal molten salt heat storage tank, and connected to the electric heat storage molten salt heat storage through a high temperature molten salt pump tank; and the outlet of the tube side of the hot air box is connected to the outlet of the solar photothermal molten salt heat storage tank through the molten salt outlet pipeline; wherein the electric heat storage molten salt heat storage tank is equipped with a molten salt electric heater, and There is also a molten salt electric heater in the hot molten salt heat storage tank; Wherein said hot air box circuit comprises a hot air box, and a circulating fan for circulation heating is installed on the hot air box; Wherein the solar thermal compensation circuit includes a solar photothermal molten salt thermal storage tank, a low temperature molten salt pump, and a solar thermal collector; wherein the solar thermal molten salt thermal storage tank, a low temperature molten salt pump, and a solar thermal collector A closed solar thermal compensation loop is formed. 2. The solar photothermal compensation type molten salt heat storage type hot air box according to claim 1, characterized in that it also includes a controller, and the controller is connected with the heat storage circuit, the hot air box circuit, and the solar compensation circuit respectively in order to During the electricity consumption time in the valley section, the molten salt heater in the electric heat storage molten salt heat storage tank heats the low-temperature molten salt in the tank into high-temperature molten salt; part of the high-temperature molten salt enters the hot air box for heating, and the other part is stored in the electric heat storage tank. The molten salt heat storage tank is used for energy storage; and during the peak power consumption time, the high temperature molten salt used for energy storage in the electric heat storage molten salt heat storage tank is transported to the hot air box for heating; the high temperature molten salt After heating in the heat exchanger, it turns into low-temperature molten salt, and the low-temperature molten salt is transported to the solar thermal molten salt heat storage tank, so that the low temperature molten salt is heated into medium temperature molten salt in the solar thermal molten salt heat storage tank After being transported to the solar photothermal molten salt heat storage tank, it is then transported to the electric heat storage molten salt heat storage tank. 3. The solar photothermal compensation type molten salt heat storage hot air box according to claim 1, wherein the solar photothermal collector comprises a trough parabolic reflector, a vacuum tube receiver, and a tracking device; wherein The tracking device is a rotating shaft so that the trough-type parabolic mirror fixed on the rotating shaft moves with the direction of sunlight, and the vacuum tube receiver is arranged in the trough-type parabolic reflector. 4. The solar photothermal compensation type molten salt heat storage hot air box according to claim 1, characterized in that, in the heat storage circuit, a water circuit system temperature sensor and a water circuit system temperature sensor are installed on the tube side inlet of the hot air box. Pressure sensor, water circuit system flow sensor; a hot salt tank liquid level gauge for monitoring liquid level and a temperature sensor for monitoring temperature are installed in the electric heat storage molten salt heat storage tank; solar photothermal molten salt heat storage tank A hot brine tank level gauge for monitoring the liquid level and a temperature sensor for monitoring the temperature are installed; a hot brine pipeline temperature sensor and a hot brine pipe are installed on the pipeline between the electric heat storage molten salt heat storage tank and the hot air box Road pressure sensor, hot salt pipeline flow sensor; hot salt pipeline temperature sensor, hot salt pipeline pressure sensor, hot salt pipeline flow sensor are installed on the pipeline between the hot air box and the solar photothermal molten salt heat storage tank. 5. The solar photothermal compensation type molten salt heat storage hot air box according to claim 1, characterized in that, in the solar thermal compensation circuit, between the solar photothermal molten salt heat storage tank and the solar photothermal heat collector The hot salt pipeline temperature sensor, hot salt pipeline pressure sensor, hot salt pipeline flow sensor are respectively installed on the supply and return pipelines; the hot salt pipeline temperature sensor, hot salt pipeline pressure sensor, hot salt pipeline flow sensor . 6. The solar photothermal compensation type molten salt heat storage hot air box according to any one of claims 1-5, characterized in that it also includes a power supply for powering the entire system.