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A control method for exhaust fan of continuous 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: 2021-04-23
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

Method used

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  • A control method for exhaust fan of continuous annealing furnace
  • A control method for exhaust fan of continuous annealing furnace
  • A control method for exhaust fan of continuous annealing furnace

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like 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 through the rotation speed control variable 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 sp...

Embodiment 2

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

[0071] an acquisition module 201, used for acquiring the set value SV of the plenum pressure and the actual value X of the plenum pressure of the continuous annealing furnace;

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

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

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

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

[0076] A determination sub-module for determining the proportional coefficient Kp and the integral tim...

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

[0092] In the specific implementation process, when the program is executed by the processor, any one of the implementation manners in the foregoing first embodiment can be implemented.

[0093] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0094] In this scheme, th...

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Abstract

The invention discloses a method for controlling the smoke exhaust fan of a continuous annealing furnace. SV is compared with the actual pressure value X of the gas collection chamber to form a deviation YEn; the deviation YEn is input to the PI controller to obtain a speed control value Yn; the speed of the exhaust fan is controlled by the speed control value Yn . The invention solves the technical problems in the prior art that the pressure of the gas collection chamber fluctuates greatly in a short period of time, resulting in extremely unstable operation of the smoke exhaust fan, and damage to the motor due to long-term operation.

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 Patents(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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