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A method and system for controlling the air-fuel ratio of an annealing furnace proportional control type burner

A proportional control, annealing furnace technology, applied in furnace type, heat treatment process control, furnace and other directions, can solve problems such as unit equipment damage

Active Publication Date: 2021-04-23
SHOUGANG JINGTANG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The common heating equipment in the heating section of the cold-rolling vertical continuous annealing furnace is the gas radiant tube. For the gas radiant tube with proportional control, the existing air-fuel ratio control method has the problem that the unit is forced to slow down or accelerate the expansion in the pipeline due to the burner extinguishing. The problem of damage to equipment such as knots

Method used

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  • A method and system for controlling the air-fuel ratio of an annealing furnace proportional control type burner
  • A method and system for controlling the air-fuel ratio of an annealing furnace proportional control type burner
  • A method and system for controlling the air-fuel ratio of an annealing furnace proportional control type burner

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Embodiment 1

[0054] In this embodiment, a method for controlling the air-fuel ratio of an annealing furnace proportional control type burner, see figure 1 , the method includes the following steps:

[0055] S101. Obtain the heating power, air flow setting value and actual air volume value of the annealing furnace;

[0056] S102. Determine whether the heating power is less than or equal to a first preset value, and whether the difference between the air flow set value and the actual air volume value is less than or equal to a second preset value;

[0057] S103. If the heating power is greater than or equal to the first preset value, and the difference between the air flow set value and the actual air volume value is less than or equal to the second preset value, set the air flow set value Set to the smaller value between the compensated theoretical gas flow value and the compensated actual gas flow value to obtain the set air flow set value; set the gas flow set value of the annealing furn...

Embodiment 2

[0099] In this embodiment, an annealing furnace proportional control type burner air-fuel ratio control system is used to control the annealing furnace, see figure 2 , the system includes:

[0100] The first obtaining module is used to obtain the heating power, air flow setting value and actual air volume value of the annealing furnace;

[0101] A judging module, configured to judge whether the heating power is less than or equal to a first preset value, and whether the difference between the air flow set value and the actual air volume value is less than or equal to a second preset value;

[0102] An air limiting module, configured to set the heating power to a second preset value if the heating power is less than or equal to a first preset value, and the difference between the air flow set value and the actual air flow value is less than or equal to a second preset value. The air flow set value is set to the smaller value between the compensated theoretical gas flow value ...

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Abstract

The invention discloses an annealing furnace proportional control type burner air-fuel ratio control method and system, which relate to the technical field of iron and steel, and can monitor the current heating power, the current air flow setting value and the current actual air volume value in real time or periodically. And according to the working conditions of the annealing furnace, preset conditions are set, and the air flow or gas flow is compensated in time, so that the set value of the air flow transmitter and the gas flow transmitter are corrected in time, so that no matter the actual air flow Whether the fuel ratio is high or low, it can be corrected in time, so that the air-fuel ratio of the system is within a reasonable range, ensuring the normal combustion of the annealing furnace, and avoiding the actual air-fuel ratio caused by abnormal detection of the gas flow transmitter or air flow transmitter. When the temperature is low, the unburned gas enters the flue gas pipe for secondary combustion, which accelerates the damage of equipment such as expansion joints in the pipe, improves the combustion efficiency of the annealing furnace, and improves the safety of the equipment at the same time.

Description

technical field [0001] The invention relates to the technical field of iron and steel, in particular to a method and system for controlling the air-fuel ratio of an annealing furnace proportional control type burner. Background technique [0002] The common heating equipment in the heating section of the cold-rolled vertical continuous annealing furnace is a gas radiant tube. For the gas radiant tube with proportional control, the existing air-fuel ratio control method may cause the unit to be forced to slow down or accelerate the expansion of the pipeline due to the burner extinguishing. The problem of damage to equipment such as knots. Contents of the invention [0003] The embodiments of the present application provide a proportional control burner air-fuel ratio control method and system for an annealing furnace, which can adjust the air-fuel ratio in time to solve at least part of the above technical problems. [0004] On the one hand, the present application provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00C21D1/34C21D1/26C21D9/56C21D11/00
CPCC21D1/26C21D1/34C21D9/56C21D11/00
Inventor 乔梁任伟超付振兴张学范
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD