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A method, system and device for controlling a fan of a gas-fired boiler air-smoke system

A gas-fired boiler and control method technology, applied in the direction of combustion method, combustion control, fuel supply adjustment, etc., can solve problems such as large fluctuations in furnace negative pressure and oxygen content, frequent automatic adjustment and cut off, and increased manual operation intensity, etc., to achieve Reduce parameter fluctuations, improve conversion efficiency, and ensure safety

Active Publication Date: 2022-08-02
HANGZHOU HOLLYSYS AUTOMATION
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Problems solved by technology

[0005] In view of this, the first object of the present invention is to provide a fan control method for the air-smoke system of a gas-fired boiler, so as to solve the problem that the negative pressure of the furnace and the fluctuation of the oxygen amount are caused by the frequent changes of gas volume and gas composition in the existing production process. Larger, automatic adjustment frequently cuts off, and the problem of increased manual operation intensity

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  • A method, system and device for controlling a fan of a gas-fired boiler air-smoke system
  • A method, system and device for controlling a fan of a gas-fired boiler air-smoke system

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Embodiment Construction

[0040] The embodiment of the invention discloses a method for controlling a fan of a gas-fired boiler air-smoke system, so as to solve the problem that in the existing production process, frequent changes in gas volume and gas composition cause large fluctuations in furnace negative pressure and oxygen volume, and frequent automatic adjustment and removal , the problem of increased manual operation intensity.

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] see figure 1 , ...

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Abstract

The invention discloses a method, system and device for controlling a fan of a gas-fired boiler air and smoke system. The flow calculation obtains the command feedforward value of the induced draft fan and the command feedforward value of the oxygen supply circuit of the blower respectively; according to the command feedforward value of the induced draft fan, the command value of the induced draft fan is corrected to control the frequency conversion of the induced draft fan. The blower command value is adjusted to control the blower frequency conversion. By applying the method and system, the gas volume flow rate and the gas calorific value flow rate are obtained by calculating the gas flow rate and the gas calorific value, and the command value of the induced draft fan and the command value of the blower are corrected in advance, so as to quickly stabilize the air and smoke system in the furnace and reduce the fluctuation of external pressure. It can improve the conversion efficiency of the boiler, reduce the fluctuation of the parameters of the wind and smoke system, and ensure the safety of the boiler.

Description

technical field [0001] The invention relates to the technical field of boiler air and fume systems, and more particularly, to a method for controlling a fan of a gas boiler air fume system, and also to a fan control system and device for a gas boiler air fume system. Background technique [0002] The fuel of the metallurgical gas boiler is composed of one or more kinds of gas, mainly composed of the following combinations: coke oven gas + blast furnace gas, blast furnace gas, blast furnace gas + converter gas, coke oven gas + blast furnace gas + converter gas, etc., coke oven gas, Blast furnace gas and converter gas are produced in real time by coke ovens, blast furnaces, and converters, and are generally far away from gas boilers. Because blast furnaces and converters are intermittently produced, and there are other car rooms, the gas pipeline pressure is extremely unstable. The combustion reaction of the gas boiler is rapid, the change of pressure has a great impact on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N1/06
CPCF23N1/06F23N2235/12
Inventor 轩福杰钱华
Owner HANGZHOU HOLLYSYS AUTOMATION
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