A grid peak-shaving system and method for electric arc furnace double-chamber iron bath coal gasification

Abstract

The invention provides a power grid peak load regulation system and method employing double-chamber iron bath coal gasification of an electric arc furnace. The system comprises a power supply device, a melting electric arc furnace and a coal gasification furnace, wherein the power supply device is connected to the melting electric arc furnace; the melting electric arc furnace is connected with the coal gasification furnace through an upper connection pipe and a lower connection pipe and the pipe orifice distance H1 between the upper connection pipe and the lower connection pipe in the melting electric arc furnace and the pipe orifice distance H3 between the upper connection pipe and the lower connection pipe in the coal gasification furnace meet the following relationship: H3 is smaller than 0.953H1; the power supply device is connected with a power grid. The method comprises the steps of firstly heating molten iron in the melting electric arc furnace and the coal gasification furnace by adopting the system and making the temperature reach 1500-1600 DEG C; spraying pulverized coal and calcium carbonate mixed powder carried in a preheating gasifier into the coal gasification furnace for coal gasification reaction and absorbing heat of the molten iron in the coal gasification furnace and the melting electric arc furnace; and finally preparing a city gas or chemical product from a high-temperature coal gas.

Description

technical field [0001] The invention relates to comprehensive utilization of power grid electric energy, in particular to a power grid peak-shaving system and method for electric arc furnace double-chamber iron-bath coal gasification. Background technique [0002] At present, thermal power generation is the main power generation method in our country. 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 the increasing peak-to-valley difference of major power grids. Power companies have higher and higher requirements on power supply security, reliability and power quality. The load distribution of the power grid is unbalanced over time, and the daily load of the power grid changes regularly over time. The power grid generator sets must meet the electricity demand in both peak and valley periods at the sa...

AI Technical Summary

Problems solved by technology

The low load of the power grid is only 60% of the peak load of the power grid, and the low power of the power grid cannot be effectively utilized

This leads to power cuts when the grid load peaks, and many units need to be shut down when the load is low

Frequent start and stop of generator sets will not only increase energy consumption, reduce the power generation efficiency of power equipment, reduce economic benefits, but also affect the service life of generator sets

In 2014, the average annual utilization rate of thermal power equipment of more than 300,000 kilowatts in my country was only 45%. For today's energy shortage, this will cause great energy waste and resource loss

In the current research and development of chemical energy storage technology, electrolytic water hydrogen production technology has the advantages of environmental protection and no pollution. High value-added hydrogen can be obtained by using this technology, but its investment cost is high and economical is poor; electrolytic aluminum technology has serious pollution problems, and in today’s overcapacity of aluminum, it is not advantageous to use electrolytic aluminum technology for power grid peak regulation

Images