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Control method of smoke discharge fan of continuos annealing furnace

A continuous annealing furnace and exhaust fan technology, applied in pump control, heat treatment process control, furnace and other directions, can solve problems such as large pressure fluctuations in the gas collection chamber, unstable operation of the exhaust fan, and motor damage.

Active Publication Date: 2019-12-17
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present application provides a control method for the smoke exhaust fan of a continuous annealing furnace, which solves the problem that the pressure of the gas collection chamber fluctuates greatly in a short period of time in the prior art, which causes the operation of the exhaust fan to be extremely unstable. Damaged technical issues

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  • Control method of smoke discharge fan of continuos annealing furnace
  • Control method of smoke discharge fan of continuos annealing furnace
  • Control method of smoke discharge fan of continuos annealing furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, this embodiment provides a method for controlling the exhaust fan of a continuous annealing furnace, including:

[0031] S101: Obtain the set value SV of the pressure of the gas collection chamber and the actual value X of the pressure of the gas collection chamber of the continuous annealing furnace; specifically, the set value SV of the pressure of the gas collection chamber is set to 1500pa.

[0032] S102: Comparing the set value SV of the pressure of the air collection chamber with the actual value X of the pressure of the air collection chamber to form a deviation YEn;

[0033] S103: Input the deviation YEn into the PI controller to obtain a speed control variable Yn;

[0034] S104: Control the rotation speed of the smoke exhaust fan by the rotation speed control amount Yn.

[0035] It should be noted that the rotational speed control variable Yn is used to control the rotational speed of the smoke exhaust fan, and the rotational speed ...

Embodiment 2

[0070] Such as Figure 6 As shown, based on the same inventive concept, the application provides a control system for a continuous annealing furnace exhaust fan, including:

[0071] The obtaining module 201 is used to obtain the set value SV of the pressure of the gas collection chamber and the actual value X of the pressure of the gas collection chamber of the continuous annealing furnace;

[0072] A comparison module 202, configured to compare the set value SV of the pressure of the air collection chamber with the actual value X of the pressure of the air collection chamber to form a deviation YEn;

[0073] The input module 203 is used to input the deviation YEn into the PI controller to obtain a rotational speed control value Yn;

[0074] The control module 204 is configured to control the rotation speed of the smoke exhaust fan through the rotation speed control value Yn.

[0075] As an optional embodiment, the input module 203 includes:

[0076] The determination sub-m...

Embodiment 3

[0090] A computer storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0091] Obtain the set value SV of the pressure of the plenum chamber and the actual value X of the pressure of the plenum chamber of the continuous annealing furnace; compare the set value SV of the pressure of the plenum chamber with the actual value X of the pressure of the plenum chamber to form a deviation YEn; The deviation YEn is input to the PI controller to obtain a rotational speed control variable Yn; the rotational speed of the exhaust fan is controlled by the rotational speed control variable Yn.

[0092] In a specific implementation process, when the program is executed by a processor, any implementation manner in the first embodiment above may be implemented.

[0093] The above-mentioned technical solutions in the embodiments of the present application have at least the following technical effect...

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Abstract

The invention discloses a control method of a smoke discharge fan of a continuos annealing furnace. The control method comprises the following steps: a gas collecting chamber pressure set value SV anda gas collecting chamber pressure actual value X of the continuous annealing furnace are obtained; thegas collecting chamber pressure set value SV is compared with the gas collecting chamber pressureactual value X to form a deviation YEn; the deviation YEn is input in a PI controller to obtain a rotating speed control quantity Yn; and the rotating speed of the smoke discharge fan is controlled through the rotating speed control quantity Yn. The control metehod solves the technical problem of motor damage caused by long-time instable operation of the smoke discharge fan due to higher fluctuation of the gas collecting chamber pressure within a shorter time in the prior art.

Description

technical field [0001] The invention relates to the technical field of cold rolling, in particular to a control method for a smoke exhaust fan of a continuous annealing furnace. Background technique [0002] The steel strip is heated by burning fuel in the continuous annealing furnace, and the waste gas generated by the combustion is discharged into the waste gas collection pipe and enters the gas collection chamber. The pressure of the gas collection chamber of the continuous annealing furnace is controlled by the speed of the exhaust fan. Due to the influence of the production line speed, furnace temperature, furnace pressure and other factors, the pressure of the gas collection chamber fluctuates greatly in a short period of time, resulting in extremely unstable operation of the exhaust fan. Stable, long-term unstable operation will cause damage to the motor, and the exhaust fan of the annealing furnace connected to the annealing line will burn out several times within a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D11/00C21D9/56C21D1/26F04D27/00
CPCC21D1/26C21D9/56C21D11/00F04D27/004
Inventor 卢杰吕剑赵志德王克川宁媛媛李想
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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