Device and method for carrying out chemical energy storage/release by utilizing carbide slag

Abstract

The invention discloses a device and a method for carrying out chemical energy storage / release by utilizing carbide slag. The device comprises a circulating fluidized bed reactor, a steam particle separator, a water pump, an electric heater and an atomizing nozzle, wherein an electric heating plate and a heat exchange tube are arranged in the circulating fluidized bed reactor, a gas distribution plate is arranged at the bottom of the circulating fluidized bed reactor, and a fluidization gas inlet of the circulating fluidized bed reactor is formed in the bottom of the circulating fluidized bed reactor; a circulating solid inlet and a feeding hole are respectively formed in the side wall of the bottom of the circulating fluidized bed reactor; the feeding hole is used for conveying carbide slag powder; an outlet of the water pump is sequentially connected with the atomizing nozzle, the electric heater and the fluidized gas inlet, a gas outlet of the circulating fluidized bed reactor is connected with an inlet of the steam particle separator, and a solid phase outlet of the steam particle separator is connected with a circulating solid inlet of the circulating fluidized bed reactor. The two gaseous substances can be prevented from being adopted in the energy storage / release process, the gas port can be prevented from being blocked, and the technological process is simplified.

Description

technical field [0001] The invention belongs to the technical field of thermal energy storage, and relates to a thermochemical energy storage method, in particular to a device and method for chemical energy storage / discharge using carbide slag. 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] The current energy storage technology mainly utilizes the sensible heat or latent heat of substances, which has low energy storage density, limited heat storage cycle, and large energy loss after long-term storage. The energy storage density of chemical reaction is higher than that of sensible heat or latent heat energy storage, which can store energy stably in the material structure,...

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Problems solved by technology

[0004] After the research of the present invention, it is found that the reversible chemical reaction of calcium-based materials is used for energy storage / discharge, and the powder of calcium-based materials needs to be fluidized in order to realize the maximum utilization of chemical reaction energy storage / discharge. The method of fluidized treatment of calcium-based materials generally adopts N 2 , O 2 Gases that do not react with CaO, in the process of energy storage / discharge, there are water vapor, CO 2 Wait for the gas that can react with CaO to participate, that is, two gaseous substances need to be provided in the process of energy storage / discharge, and the mixed gas needs to be separated after the reaction, resulting in a complicated process

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