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A method of thermochemical energy storage using limestone

A limestone and thermochemical technology, applied in the field of energy storage, can solve the problems of poor safety performance and high cost, and achieve the effects of low cost, no side reaction reaction temperature, and wide source of raw materials

Active Publication Date: 2020-08-07
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the shortcomings of poor safety performance and high cost in the prior art, and propose a method for thermochemical energy storage using limestone to solve the problems raised in the above-mentioned background technology

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention proposes a method for thermochemical energy storage using limestone, comprising the following steps:

[0022] S1: Check the reactor, start the feeding device, and send the limestone into the reactor by screw feeding method. The bottom of the reactor is equipped with a temperature measuring device, and the reactor is equipped with a pressure relief port and a discharge port. The outer wall of the reactor There is a temperature detection device on the top. After the feeding is completed, the feeding port is closed, and the heating device inside the reactor is powered on and heated by the external controller, so that the internal temperature of the reactor rises to 850 ° C;

[0023] S2: The limestone in the reactor decomposes at 850°C. At this time, the reactor is an energy storage device. The pressure detector on the reactor shows the pressure change inside the reactor. After the limestone is completely decomposed, calcium oxide and carbon dioxide gas...

Embodiment 2

[0027] The present invention proposes a method for thermochemical energy storage using limestone, comprising the following steps:

[0028] S1: Check the reactor, start the feeding device, and send the limestone into the reactor by screw feeding method. The bottom of the reactor is equipped with a temperature measuring device, and the reactor is equipped with a pressure relief port and a discharge port. The outer wall of the reactor There is a temperature detection device on the top. After the feeding is completed, the feeding port is closed, and the heating device inside the reactor is powered on and heated by the external controller, so that the internal temperature of the reactor rises to 900 ° C;

[0029] S2: The limestone in the reactor decomposes at 900°C. At this time, the reactor is an energy storage device. The pressure detector on the reactor shows the pressure change inside the reactor. After the limestone is completely decomposed, calcium oxide and carbon dioxide gas...

Embodiment 3

[0033] The present invention proposes a method for thermochemical energy storage using limestone, comprising the following steps:

[0034] S1: Check the reactor, start the feeding device, and send the limestone into the reactor by screw feeding method. The bottom of the reactor is equipped with a temperature measuring device, and the reactor is equipped with a pressure relief port and a discharge port. The outer wall of the reactor There is a temperature detection device on the top. After the feeding is completed, the feeding port is closed, and the heating device inside the reactor is energized and heated by the external controller, so that the internal temperature of the reactor rises to 875 ° C;

[0035]S2: The limestone in the reactor decomposes at 875°C. At this time, the reactor is an energy storage device. The pressure detector on the reactor shows the pressure change inside the reactor. Calcium oxide and carbon dioxide gas are obtained after the limestone is completely ...

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PUM

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Abstract

The invention relates to the technical field of energy storage, in particular to a method for utilizing limestone for thermochemistry energy storage. A reactor is checked, a feeding device is started,the limestone is conveyed into the reactor, a heating device in the reactor is powered on for heating under the action of an outer controller, the inner temperature of the reactor is increased to 850-900 DEG C, the limestone in the reactor is decomposed at the temperature ranging from 850 DEG C to 900 DEG C, the reactor is an energy storage device at the time, air and carbon dioxide are led in from a bottom end air inlet of the reactor and are mixed through a gas mixer, the controller controls the heating device in the reactor for heating, and the inner temperature of the reactor is increasedto 600 DEG C; and calcium oxide in the reactor is reacted with the mixed gas, heat is released, the reactor is an energy releaser at the time, the carbon dioxide is nearly reacted completely at the time, the concentration of the carbon dioxide is measured through an outlet, emptying is conducted after the concentration reaches the standard, and the process is the energy releasing process.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a method for thermochemical energy storage using limestone. Background technique [0002] Concentrating solar thermal power generation technology can convert solar energy into electrical energy, so it can reduce the consumption of fossil fuels and alleviate the greenhouse effect caused by the combustion of carbon dioxide. However, because solar energy is intermittent and easily affected by environmental factors, how to ensure the continuous supply of solar energy becomes the key to solar thermal power generation technology. One possible approach is to use a thermal energy storage system that stores solar energy when the weather is sunny and releases the stored energy when there is little or no solar radiation. [0003] The clean conversion and utilization of energy is crucial to the sustainable development of my country's society and economy. The use of appropriate energy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D20/00
CPCF28D20/003Y02E60/14
Inventor 高彩云李东靳治良刘剑虹
Owner BEIFANG UNIV OF NATITIES