Electric power storage system and method employing coal gasification of solid heat carrier

Abstract

The invention provides an electric power storage system and method employing coal gasification of a solid heat carrier. The system comprises a power supply device, a fluidized bed powdered coal gasifier, a cyclone dust collector, an ash discharge classifier and a fine ash collecting chamber, wherein the power supply device is connected with the fluidized bed powdered coal gasifier; the fluidized bed powdered coal gasifier comprises a gasifier body; a metal heat carrier is contained inside the gasifier body and an electric heating element is arranged outside the gasifier body; a gas outlet of the gasifier body is connected with the cyclone dust collector; a feed opening of the cyclone dust collector is connected to a feeding inlet of the ash discharge classifier; a coarse ash outlet of the ash discharge classifier is connected with a material return opening; and a fine ash outlet of the ash discharge classifier is connected with the fine ash collecting chamber. The method comprises the steps of firstly heating the fluidized bed powdered coal gasifier until the temperature reaches 800-1300 DEG C by adopting the system; carrying out coal gasification reaction by using a preheating gasification agent mixed with pulverized coal and calcium carbonate mixed powder in the coal gasifier; and finally preparing a city gas or a chemical product from the high-temperature coal gas.

Description

technical field [0001] The invention relates to comprehensive utilization of power grid electric energy, in particular to a solid heat carrier coal gasification power storage system and method. Background technique [0002] At present, thermal power generation is the main power generation method in my country, and it will not change in the future. However, in recent years, with the improvement of people's living standards and the adjustment of industrial structure in our country, great changes have taken place in the power consumption structure of the whole society, resulting in an increasing peak-to-valley difference between major power grids. However, the regulation ability of the power grid itself is relatively weak. Therefore, when the installed capacity of generators is difficult to meet the peak power consumption of the grid load, it is necessary to adopt the method of power rationing to ensure the stable operation of the generator set, and when the power consumption i...

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Problems solved by technology

Among the current chemical energy storage technologies, electrolytic water hydrogen production technology has the advantages of environmental protection and no pollution, and can obtain high value-added hydrogen, but this technology has high investment costs and poor economic efficiency; electrolytic aluminum technology pollutes the environment seriously, and in Today, with excess aluminum production capacity, there is no advantage in power grid peak regulation through electrolytic aluminum technology

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