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Online measuring and controlling system for combustion condition of steel rolling heating furnace

A combustion state, heating furnace technology, applied in the direction of heat treatment furnace, heat treatment process control, furnace, etc.

Inactive Publication Date: 2016-07-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the existing heating furnace measurement and control methods, the present invention provides an online measurement and control method for the combustion status of the steel rolling heating furnace, which measures the oxygen content of the combustion atmosphere in different sections of the heating furnace online, and adjusts the corresponding air excess coefficient online , can realize online accurate measurement and independent control of combustion conditions in different sections

Method used

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  • Online measuring and controlling system for combustion condition of steel rolling heating furnace
  • Online measuring and controlling system for combustion condition of steel rolling heating furnace
  • Online measuring and controlling system for combustion condition of steel rolling heating furnace

Examples

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Effect test

Embodiment 1

[0024] see figure 1 , the online measurement and control method for the combustion state of the steel rolling heating furnace is characterized in that it comprises the following steps:

[0025] 1) Install the oxygen analyzer (1) on the top of the preheating section, heating section and soaking section of the heating furnace (2).

[0026] 2) Use the oxygen analyzer (1) in step 1) to measure the oxygen content of the combustion atmosphere in the preheating section, heating section and soaking section of the heating furnace (2) online, and convert the measurement information through the data processing unit (3) and then sent to the programmable logic controller (4).

[0027] 3) Compare and analyze the measured value of the oxygen content of the combustion atmosphere in different sections described in step 2) and the set value, and adjust the air excess coefficient of the corresponding section online through the programmable logic controller (4) to realize heating Precise contro...

Embodiment 2

[0029] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0030] The online measurement and control method for the combustion status of a steel rolling heating furnace is characterized in that:

[0031] The oxygen analyzer (1) in step 1) uses COMTEC6000 in-line oxygen analyzer, which has a high temperature resistant protective sleeve, and can accurately and reliably collect and collect combustion in real time at temperatures above 1200°C and below 1800°C Oxygen content data in the atmosphere. The oxygen analyzer (1) described in step 1) is installed on the top of the preheating section, heating section and soaking section of the heating furnace (2), the detection probe is located at the outlet of the combustion gas, and the height should avoid the billet to prevent the billet from moving and colliding damage the probe.

[0032] The data processing unit (3) in step 2) is an analog / digital conversion module commonly used in any in...

Embodiment 3

[0037] Such as figure 1 As shown, the online measurement and control method for the combustion status of the steel rolling heating furnace uses equipment including an oxygen analyzer (1), a heating furnace (2), a data processing unit (3) and a programmable logic controller (4).

[0038] During the moving process of the steel slab being heated to an elevated temperature, it passes through the preheating section, the heating section and the soaking section of the heating furnace (2) successively, while the flow direction of the combustion gas is opposite to it. This patent is an online measurement and control method for the combustion status of a steel rolling heating furnace. A COMTEC6000 in-line oxygen analyzer (1) is installed at the outlet of the combustion gas in the three sections of the preheating section, the heating section and the soaking section, and the online measurement furnace Oxygen content in the combustion atmosphere of different sections in the heating furnace...

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Abstract

The invention relates to an online measurement and control method for the combustion status of a steel rolling heating furnace. Aiming at the method of detecting the residual oxygen in the flue of the traditional heating furnace, it is difficult to independently control the combustion atmosphere in different sections of the heating furnace, the combustion efficiency is low, and the billet is oxidized and burned too much. Many more questions. The present invention installs the oxygen analyzer at the combustion gas outlet of each section on the top of the heating furnace to measure the oxygen content of the combustion atmosphere in different sections of the furnace online, and then based on the oxygen content measurement value, the excess air in the corresponding section The coefficient is adjusted online to realize the precise control of the oxygen content in the combustion atmosphere in different sections of the heating furnace. The invention can help the operator to automatically operate the combustion status of the heating furnace within the required range, realize accurate measurement and control of the combustion status of different sections, improve the combustion efficiency of the heating furnace, reduce the oxidation and burning loss of the billet, and improve the performance and yield of the product. Important engineering application promotion value.

Description

technical field [0001] The present invention relates to the field of heating furnace combustion control, in particular to an online measurement and control method for the combustion status of a steel rolling heating furnace. Aiming at the method of traditional heating furnaces only detecting the amount of residual oxygen in the flue, it is difficult to independently control the combustion atmosphere in different sections of the heating furnace. The combustion efficiency is low, and the billet is oxidized and burned too much. technical background [0002] Heating furnaces are the largest energy-consuming equipment in steel rolling mills. 60-70% of the energy consumption in rolling mills is used in heating furnaces. Controlling the combustion atmosphere to achieve high-efficiency combustion has huge energy-saving space. In addition, if the combustion atmosphere is not well controlled, a large amount of oxidation and burning will occur on the surface of the billet during the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D11/00C21D9/70
CPCC21D11/00C21D9/70
Inventor 王建国赵京辉曹志铎董俊杰马世伟费敏锐
Owner SHANGHAI UNIV
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