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Method for preventing surging of fans

A fan and combustion-supporting fan technology, applied in mechanical equipment, machine/engine, pump control, etc., can solve problems such as combustion-supporting fan surge, achieve the effects of protecting the fan, avoiding surge phenomenon, and prolonging the service life

Active Publication Date: 2015-01-07
WUHAN IRON & STEEL ENG TECH GROUP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preventing fan surge, so as to solve the problem that during the normal production process of the silicon steel high-temperature annular annealing furnace, when two combustion-supporting fans switch, or when the furnace changes from normal combustion to The technical problem of the surge of the combustion-supporting fan when it reaches the minimum combustion state

Method used

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  • Method for preventing surging of fans
  • Method for preventing surging of fans
  • Method for preventing surging of fans

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The rated current value of the two combustion-supporting blowers in this specific embodiment is 170 amperes.

[0025] figure 1 Flowchart for on-site detection distribution. Compared with the prior art, the present invention only adds a regulating valve and a pressure detection device at the outlet of each combustion-supporting blower.

[0026] figure 2 It is the relationship diagram between each detection signal and the computer control system. Depend on figure 2 It can be seen that the collected starting signals, current detection signals, outlet pressure detection signals, air main pipe pressure detection signals and furnace combustion signs of the two combustion-supporting fans are all sent to the computer control system. The combustion mark in the furnace is a function set by the user of the high-temperature annular ...

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Abstract

The invention discloses a method for preventing surging of fans. The method for preventing surging of the fans comprises the following steps of arranging an outlet adjusting valve and a pressure detecting device on an outlet of each combustion fan; acquiring starting signals of each combustion fan, furnace inside combustion marks, running current detection signals, outlet pressure detection signals and opening feedback signals of the outlet adjusting valves; acquiring pressure detection signals of an air main tube; and transmitting the signals to a computer control system and calculating and analyzing the signals. When the current value of the combustion fans are lower than a normal working current range, the adjusting valves on the outlets of the combustion fans are adjusted according to the current value, the opening of the valves is adjusted, air supply load is increased, and the pressure of the outlets of the combustion fans is greater than or equal to the pressure on the air main tube. By the method, surging of the fans can be effectively avoided, so that the fans are protected, and the service lives of the fans are prolonged.

Description

technical field [0001] The invention relates to a control method for preventing fan surge and belongs to the technical field of iron and steel production. Background technique [0002] The silicon steel high-temperature annular annealing furnace is equipped with two frequency conversion combustion-supporting fans. If the fan surges during use, the fan will periodically blow out and backflow, which will seriously affect the service life of the fan. [0003] The surge phenomenon of the fan mainly occurs in the following two working conditions: 1. In the normal production process, one combustion-supporting fan is in working state, and the other combustion-supporting fan is in standby state. When switching from the working combustion-supporting fan to the backup combustion-supporting fan, if the control system detects that the backup combustion-supporting fan has started, the working combustion-supporting fan will stop. However, often the standby combustion-supporting fan is j...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00
CPCF04D25/166F04D27/0253
Inventor 朱霞苏光明王建斌胡楚飞田宏焘张蔚
Owner WUHAN IRON & STEEL ENG TECH GROUP
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