Calcium-based thermochemical energy storage and release system equipped with dense-phase fluidization storage tank and process

Abstract

The invention discloses a calcium-based thermochemical energy storage and release system equipped with a dense-phase fluidized storage tank and a process. The system comprises a fluidized bed reactor which is used for a hydration exothermic reaction of calcium oxide and water and a thermal decomposition endothermic reaction of calcium hydroxide; a high-temperature separator used for separating a gas-phase material from a solid-phase material at an outlet of the fluidized bed reactor; a material returning device used for receiving the solid-phase material separated by the high-temperature separator; a stock bin used for receiving and storing the solid-phase material received by the material returning device; and an aggregate fluidization air inlet is arranged at the bottom of the stock bin, the aggregate fluidization air inlet is connected with an aggregate fluidization air source, and a material outlet of the stock bin is connected with a material inlet of the fluidized bed reactor. On the premise of low energy consumption, the problem of moisture absorption and adhesion of powdery materials in a non-energy-storage or energy-release stage can be solved, so that renewable energy power generation and circulating fluidized bed power generation can be coordinated in a heat energy storage mode, and the peak regulation rate of circulating fluidized bed power generation is increased.

Description

technical field [0001] The invention relates to a calcium-based thermochemical energy storage and discharge system and process equipped with a dense-phase fluidized storage tank. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Energy plays an increasingly important role in modern society. With the consumption of fossil energy, energy and environmental problems are becoming more and more serious. According to data from the National Bureau of Statistics, by the end of 2019, the installed capacity of power generation nationwide was 2.01 billion kilowatts, of which the installed capacity of renewable energy power generation accounted for 40.8%, and the installed capacity of t...

AI Technical Summary

Problems solved by technology

Since the thermal power unit increases or decreases the load by increasing or decreasing the amount of fuel, but there is a certain time interval between changing the amount of fuel and changing the amount of power generation, so its peak-shaving rate is limited, making it unable to respond quickly to the power grid. Peak shaving command, in which the peak shaving rate of circulating fluidized bed power generation is significantly affected by its large thermal inertia

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