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-shaving system and method for electric arc furnace double-chamber iron bath coal gasification. The system includes a power supply device, an iron-melting electric arc furnace, and a coal gasification furnace. The power supply device is connected to the iron-melting electric arc furnace. The iron-melting electric arc furnace is connected to the coal gasification furnace through an upper connecting pipe and a lower connecting pipe, and the distance H between the openings of the upper connecting pipe and the lower connecting pipe in the iron-melting electric arc furnace is 1 The distance H from the pipe openings of the upper connecting pipe and the lower connecting pipe in the coal gasification furnace 3 To satisfy the following relationship: H 3 <0.953H 1 ; The power supply device is connected to the power grid. The method is to use the above system to first heat the molten iron in the iron-melting electric arc furnace and the coal gasification furnace to make the temperature reach 1500~1600°C; then use the preheated gasification agent to spray the mixed powder of pulverized coal and calcium carbonate into the gas. The coal gasification reaction is carried out in the gasification furnace, absorbing the heat of the molten iron in the coal gasification furnace and the iron-melting electric arc furnace; finally, the high-temperature gas is used to prepare city gas or chemical products.

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

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