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Full automatic control method and system for blast furnace pulverizing systems

A technology of pulverizing system and blast furnace, applied in blast furnace, blast furnace details, blast furnace parts and other directions, can solve the problems of high equipment operation rate, operator error, high consumption of coal and electricity per ton, and high gas consumption, so as to eliminate artificial The effect of operating errors, reducing wear and tear of mechanical parts, and reducing power consumption and gas consumption per ton of coal

Active Publication Date: 2014-01-08
JIANGSU JINHENG INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, all domestic milling systems are manually operated, individual differences and operating habits are different, and various indicators fluctuate greatly during the operation of each shift. The carelessness of operators often leads to operational errors.
As a result, the stability of the finished pulverized coal is poor, the operation rate of equipment remains high, and the high consumption of electricity and gas per ton has become a common problem. Due to the high operation rate of the system, it conflicts with the normal maintenance time, and some routine maintenance items must not be abandoned, causing system failures Rate rises, easy to enter a vicious circle

Method used

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  • Full automatic control method and system for blast furnace pulverizing systems

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is a common process flow diagram of blast furnace coal injection pulverization system. The pulverization system is mainly composed of dry gas generator (referred to as drying furnace), induced draft fan, coal feeder, coal mill, main exhaust fan, cloth bag collector and various valves. components.

[0030] Taking the control of the pulverizing system of No. 3 blast furnace of Nangang as an example, with a volume of 2000m3, two pulverizing systems are set up. Each pulverizing system uses a 35t / h medium-speed coal mill. Burn the furnace, use the induced draft fan to mix the waste flue gas of the hot blast stove for drying, and collect the short-process process using high-concentration bag collection.

[0031] The automatic control method of the blast furnace pulverizing system is as follows:

[0032] (i) Preparation and activation

[0033] Start judgment:

[0034] Before starting the pulverizing system, check the current hourly coal injection volume and p...

Embodiment 2

[0046] The fully automatic control system of the blast furnace pulverizing system includes:

[0047] (1) Preparation and start-up unit: used to perform the start-up operation of the pulverizing system;

[0048] The preparation and initiation unit consists of two parts:

[0049] Startup judging unit: By detecting the amount of coal injected in the current hour and the amount of pulverized coal stored in the pulverized coal bin, it is determined to start a single pulverizing system or all pulverizing systems according to the set conditions. Specifically: when it is detected that the amount of powder stored in the coal powder bin is greater than 8 hours and the hourly coal injection amount is less than the design value of the coal mill, start a single pulverizing system, otherwise start all pulverizing systems;

[0050] Start control unit: start each equipment of the pulverizing system according to the set conditions. specifically is:

[0051] When it is detected that ther...

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Abstract

The invention discloses a full automatic control method and system for blast furnace pulverizing systems. Each blast furnace is provided with at least two pulverizing systems. All the pulverizing systems share the same pulverized coal bunker. The method comprises the following steps: preparing and starting, wherein starting judgments and starting control are included; operation adjustments; halt control. The method can realize uniform operation through program control, adjusts the number of started pulverizing systems according to actual conditions, and realizes full automatic control operation of the blast furnace pulverizing systems. The method greatly reduces labor intensity and thought tension degree of workers and improves working efficiency so as to eradicate manual operation errors and solve the problems that the equipment operation rate is high, running fluctuation is large, and index stability is poor when a manual operation system is used. Moreover, the method enables one person to monitor a plurality of pulverizing systems, improves the running efficiency of the systems, reduces operation cost, enables the systems to have more time to be maintained and repaired, and enables the whole pulverizing system to be in a virtuous circle.

Description

technical field [0001] The invention relates to a control method and system for a blast furnace coal-injection pulverization system in the metallurgical industry. Background technique [0002] At present, the blast furnaces of domestic metallurgical industry ironworks all have coal injection systems. The coal injection system is divided into three parts: raw coal supply, pulverization, and injection, and pulverization is the most critical part of the entire coal injection system. The coal mill Hourly production capacity, qualified rate of finished pulverized coal, power consumption per ton of coal, gas consumption, and equipment operation rate are key indicators to test the pulverizing system. At present, the domestic milling systems are all manually operated, individual differences and operating habits are different, and various indicators fluctuate greatly during the operation of each shift. The carelessness of the operators often leads to operational errors. As a result,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C25/00C21B5/00C21B7/00
Inventor 张明星肖国才
Owner JIANGSU JINHENG INFORMATION TECH CO LTD
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