A sleeve kiln gas intelligent control device and control method

An intelligent control, sleeve kiln technology, applied in furnace control device, combustion method, controlled combustion, etc., can solve the problems of stable gas supply, increased operation errors, poor lime quality, and cost that affect lime calcination

Active Publication Date: 2021-03-16
NANJING MEISHAN METALLURGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems currently existing when using coal gas are: high production cost, the gas cost per ton of ash exceeds 240 yuan / ton ash; lime quality fluctuates greatly, with an average activity of only about 330ml, raw and overburned are serious; due to gas flow The calorific value fluctuates greatly, and the main control personnel have more manual intervention, which greatly increases the labor intensity; at the same time, due to the individual errors of manual operations, the increase in operating errors affects the stable supply of gas for lime calcination, resulting in lime quality, cost and other indicators. poor

Method used

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  • A sleeve kiln gas intelligent control device and control method
  • A sleeve kiln gas intelligent control device and control method
  • A sleeve kiln gas intelligent control device and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0194] Take Meishan Steel's No. 1 sleeve kiln on June 25, 2017 as an example:

[0195] 1. The process parameter maintenance module sets the initial value of the process parameter or maintains the process parameter.

[0196] 2. The data collection module collects real-time data in the relevant production process;

[0197] 3. The heat consumption R of lime calcination is 970Kcal / Kg, the adjustment coefficient of reduction rate k1=1.02, the adjustment coefficient of activity k2=1.01, the heat coefficient of calcination k3=1.015, and the hourly lime output of 1# sleeve kiln is 19968.8Kg, then The heat consumption calculation module calculates the total heat consumption per unit time:

[0198] W=R*D*k1*k2*k3=970*19968.8*1.024*1.06*1.015=2.134×107Kcal / h

[0199] 4. The coal gas calorific value acquisition module regularly collects and stores the real-time calorific values ​​of various gases and stores them in the database in the background of the system;

[0200] The cycle of gas...

Embodiment 2

[0225] Take the No. 3 sleeve kiln of Meishan Iron and Steel Co., Ltd. on June 30, 2017 as an example:

[0226] 1. The process parameter maintenance module sets the initial value of the process parameter or maintains the process parameter.

[0227] 2. The data collection module collects real-time data in the relevant production process;

[0228] 3. The heat consumption R of lime calcination is 975Kcal / Kg, the adjustment coefficient of reduction rate k1=1.02, the adjustment coefficient of activity k2=1.02, the heat coefficient of calcination k3=0.86, the hourly lime output of 1# sleeve kiln is 17750Kg, then the heat The consumption calculation module calculates the total calorie consumption per unit time:

[0229] W=R*D*k1*k2*k3=975*17750*1.02*1.02*0.86=1.5485×10 7 Kcal / h

[0230] 4. The coal gas calorific value acquisition module regularly collects and stores the real-time calorific values ​​of various gases and stores them in the database in the background of the system;

...

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Abstract

The invention provides a sleeve kiln gas intelligent control device and control method. The device comprises a process parameter maintenance module, a data collection module, a heat consumption calculation module, a gas flow calculation module, a gas flow control module, a gas calorific value acquisition module, a gas calorific value correction module, and a process parameter correction module. According to the control method, the relevant control parameters is set by workers on a host computer, and the calculation and control are performed through a PLC control system, so that an adjusting device in an annular sleeve kiln automatically adjusts according to the actual situation.

Description

Technical field: [0001] The invention relates to a sleeve kiln gas intelligent control device and a control method, belonging to the technical field of metallurgy automation. Background technique: [0002] At present, the advanced active lime shaft kilns at home and abroad are mainly sleeve kilns, Fukas kilns, Maerz kilns, etc. The sleeve kiln built by Meishan Steel in the 1990s is the first time that the Beckenbach annular sleeve kiln technology has been introduced in China. At present, more than 300 annular sleeve kilns have been built in the world, which have the advantages of environmental protection, safety, energy saving, good product quality and high equipment operation rate. The energy fuels used in sleeve kilns are mainly solid fuels and gaseous fuels, and the gas by-products of blast furnaces, converters and coke ovens are mainly used in metallurgical enterprises. The main problems currently existing when using coal gas are: high production cost, the gas cost per ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D19/00F23N1/00
CPCF23N1/002F27D19/00F27D2019/004
Inventor 江书文王绪国
Owner NANJING MEISHAN METALLURGY DEV
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