Control system for pulverized coal making of pulverized coal injection

Abstract

The invention relates to a control system for pulverized coal making of pulverized coal injection, which is mainly composed of a Programmable Logic Controller (PLC) control system and a Human Machine Interface (HMI), wherein the control system communicates with a raw coal system and a coal injection system through an industrial Ethernet; the PLC control system controls operation of equipment of a pulverized coal making system, controls technological parameters, such as, raw coal feeding quantity, gas flow, pressure, temperature, and the like, of the pulverized coal making system according to set values and a signal of a field sensor, and monitors contents of carbon monoxide and oxygen in the pulverized coal making system; the HMI inputs and sets a set value of the coal feeding quantity, a set value of gas temperature, a set value of pressure of a mill, a set value of pressure difference of the inlet and the outlet of the mill, a set value of the gas flow, and public and auxiliary set values through the human machine interface, and also displays the whole progress of the pulverized coal making system on the interface. The control system disclosed by the invention controls the equipment of the whole pulverized coal making system to run harmonically, controls important parameters, such as, pressure, gas flow, temperature, and the like, of the pulverized coal making system, keeps the pulverized coal making system running steadily, and provides excellent pulverized coals for bituminous coal injection of blast furnaces safely and efficiently.

Description

technical field [0001] The invention relates to a blast furnace bituminous coal injection pulverizing control system. Background technique [0002] Blast furnace pulverized coal injection can replace coke, provide heat and reducing agent, reduce the coke ratio and pig iron cost of blast furnace ironmaking, and is an effective means to adjust the furnace heat system, which can improve the working state of the blast furnace hearth and make the blast furnace stable and smooth. Row. Blast furnace pulverized coal injection is also the most important measure to save energy and reduce consumption and reduce ironmaking costs in the ironmaking process. Blast furnace coal injection has become an inevitable trend in the development of blast furnace technology. [0003] Pulverizing system is an important part of blast furnace pulverized coal injection. The task of the pulverizing system is to safely process the raw coal (anthracite or bituminous coal and the mixed coal of anthracite ...

AI Technical Summary

Problems solved by technology

The existing system mainly relies on manual control and adjustment, the degree of automation is low, and it is difficult to achieve the target value

There are also studies on the control system of pulverized coal injection pulverization, but only limited to one or several local control studies, such as temperature control, flue gas concentration control, etc., without forming an overall control

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