A Pulverized Coal Injection Stability Control System

Abstract

The invention discloses a pulverized coal injection stability control system, which belongs to the technical field of blast furnace ironmaking. The hardware of the system consists of a gas supplementation regulating valve, a supplementary pressure valve, a tank pressure measuring device and an electronic weighing device on the injection tank. , the software consists of the instantaneous coal volume calculation section, the tank pressure automatic stabilization section, and the coal volume positive fluctuation adjustment section program. The pulverized coal injection stability control system of the example of the present invention automatically adjusts the valve opening and tank pressure setting of the gas supply control valve by comparing the calculated instantaneous amount of pulverized coal with the demanded coal amount of the blast furnace according to the value of the coal demand of the blast furnace. Set the value, change the supply air flow and tank pressure, and then realize the stable automatic adjustment of the injected coal amount.

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 pulverized coal injection is one of the important means to save iron smelting cost, increase pig iron output and reduce environmental pollution of coking. The stability of pulverized coal injection and the uniformity of coal quantity will have a great influence on the stability of blast furnace. At present, the blast furnace coal injection generally adopts the injection tank bottom fluidized pump pressure supplementary gas process to inject coal into the blast furnace; the adjustment of the injection coal amount generally adopts the means of adjusting the supplemental gas flow and tank pressure; due to the process of pulverized coal injection , the change of coal volume is a large lag variable, there are many disadvantages of manual adjustment, and it is difficult t...

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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