Pulverized coal injection stability control system

Abstract

The invention discloses a pulverized coal injection stability control system, and belongs to the technical field of blast furnace ironmaking. Hardware of the system is composed of an air supply regulating valve, a pressure supply valve, a tank pressure measuring device and an electronic weighing device on an injection tank, and software is composed of an instantaneous coal quantity operation section program, a tank pressure automatic stabilizing section program and a coal quantity sine fluctuation regulating section program. According to the value of the blast furnace demand coal quantity, through comparison of the calculated pulverized coal instantaneous quantity and the blast furnace demand coal quantity, the pulverized coal injection stability control system automatically adjusts the valve opening degree of the air supply adjusting valve and the tank pressure set value, changes the air supply flow and the tank pressure, and then achieves stable and automatic adjustment of the coal injection quantity.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, in particular to a pulverized coal injection stability control system. Background technique [0002] Blast furnace injection of pulverized coal is one of the important means to save ironmaking and smelting costs, increase pig iron production, and reduce coking environmental pollution. The stability of the pulverized coal injection and the uniformity of the coal quantity will have a great impact on the stability of the blast furnace. At present, the blast furnace coal injection generally adopts the tank bottom fluidized pump pressure gas supply process to inject coal into the blast furnace; the adjustment of the injection coal volume generally adopts the means of adjusting the gas supply flow and tank pressure; , the change of coal volume is a large lagging variable, there are many disadvantages of manual adjustment, and it is difficult to control the timing accurately in a timel...

AI Technical Summary

Problems solved by technology

At present, the blast furnace coal injection generally adopts the tank bottom fluidized pump pressure gas supply process to inject coal into the blast furnace; the adjustment of the injection coal volume generally adopts the means of adjusting the gas supply flow and tank pressure; , the change of coal volume is a large lagging variable, there are many disadvantages of manual adjustment, and it is difficult to control the timing accurately in a timely manner

At present, most of the pulverized coal injection systems have realized the automatic tank dumping operation, but the automatic control and stable adjustment of the coal volume are limited by the familiarity of the injection process, the technical level of program control, etc., and most of them are difficult to realize

In manual operation, inaccurate control of coal quantity and unstable uniformity often occur, which adversely affects the smooth operation of blast furnace production.

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