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Fully automatic control method and system for blast furnace injection system

A blast furnace, injection volume technology, applied in blast furnace, blast furnace details, blast furnace parts, etc., can solve problems such as large injection volume error, achieve stable operation, eliminate system fluctuations, and liberate labor force

Active Publication Date: 2015-09-30
JIANGSU JINHENG INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fully automatic control method and system for the blast furnace injection system, which can realize fully automatic control operation during the blast furnace coal injection injection process, eliminate system fluctuations caused by manual control operations, and eliminate manual manual control Operation error, solve the problem of large error of hourly injection volume

Method used

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  • Fully automatic control method and system for blast furnace injection system

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Effect test

Embodiment 1

[0023] Taking Nangang No. 3 blast furnace as an example, the volume is 2000m 3 ,Such as figure 1 As shown, three tanks are used in parallel with a single pipeline for direct injection, and the volume of a single injection tank is 38m 3

[0024] The control method of the injection system is divided into several steps: preparation, pressure relief, powder filling, pressure filling, injection, and can pouring. The program controls each part of the injection system to operate as follows:

[0025] Preparation: Set all valves to be under centralized control, open the compressed air cut-off valve, open the compressed air regulating valve to 60%, send air to the distributor, and close the valves connected to the spray tank.

[0026] Pressure relief: open the small pressure relief valve, and open the large pressure relief valve when the internal pressure of the monitoring tank drops to 200Kpa.

[0027] Powder loading: When the pressure in the injection tank drops to 10Kpa, open the ...

Embodiment 2

[0032] The automatic control system of the injection system includes:

[0033] Preparation unit: it is used to set all the valves under centralized control, open the compressed air cut-off valve, open the compressed air regulating valve to 60%, send air to the distributor, and close the valves connected to the spray tank;

[0034] Pressure relief control unit: control the small pressure relief valve and the large pressure relief valve to realize the pressure relief of the blowing tank.

[0035] Specifically: open the small pressure relief valve, and open the large pressure relief valve when the internal pressure of the monitoring tank drops to 200Kpa.

[0036]Powder filling control unit: according to the set conditions, control the fluidization valve of the pulverized coal bin, the powder filling dome valve, and the powder filling butterfly valve to realize the powder filling of the injection tank.

[0037] Specifically: when the pressure in the injection tank drops to 10Kpa,...

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Abstract

The invention discloses a full automatic control method and system of a blast furnace injection system, wherein each part of the injection system is controlled by a program. The full automatic control method comprises the steps of preparation, pressure relief, powder loading, pressure charging, injection and transfer. The control method and the control system provided by the invention are capable of realizing full automatic control operations in the coal injection process of the blast furnace, eliminating system fluctuation caused by manual control operations and solving the problem of high error of injection quantity per hour; the error accuracy of the injection quantity per hour is controlled to be less than or equal to 1%; the control accuracy is averagely 3 times of that of manual operation control; the injection quantity per hour is low in linear fluctuation and high in stability; besides, manual control operation errors are avoided so that the whole blast furnace injection system is more stable and safer in running; and simultaneous monitoring of a plurality of systems by one person can be realized easily; the labor is freed; and the labor cost can be reduced while the operational efficiency of the blast furnace injection system is improved.

Description

technical field [0001] The invention relates to a control method and system for a blast furnace coal injection system in the metallurgical industry. Background technique [0002] At present, most of the coal injection systems used by domestic metallurgical enterprises are manual and fully manual control operations, and some are partially automatic control, which is called semi-automatic control. Manual operation and semi-automatic manual control operations require manual intervention. In view of the large individual differences of the operators, the depth of understanding of the system, the ability to control the operation, the strength of the sense of responsibility, and the influence of the fatigue of the operation, resulting in large fluctuations in the system due to large differences between individuals during the operation process, the key points are The error value of the hourly injection volume is high, with an average of ≥3%, and the hourly linear injection volume fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00C21B7/00
Inventor 张明星赵自力
Owner JIANGSU JINHENG INFORMATION TECH CO LTD
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