Method for controlling pulse combustion of multiple burners of fuel gas furnace

A technology of pulse combustion and gas furnace, which is applied in the field of burner combustion, can solve problems such as failure to meet temperature uniformity requirements, and achieve the effects of good temperature uniformity in the furnace, time and space balance, and energy saving

Inactive Publication Date: 2014-06-04
JIANGNAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to achieve higher heat treatment process requirements, the above-mentioned combustion control method cannot meet the temperature uniformity requirements on many gas-fired low-temperature furnaces

Method used

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  • Method for controlling pulse combustion of multiple burners of fuel gas furnace
  • Method for controlling pulse combustion of multiple burners of fuel gas furnace
  • Method for controlling pulse combustion of multiple burners of fuel gas furnace

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Embodiment Construction

[0031] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] The invention proposes a new control method aiming at the control of multiple burners in the gas furnace, which does not involve the basic situation of combustion control of a single burner. For each burner to burn normally, the air valve and gas valve are required to provide air and gas respectively, and to ensure a certain reasonable air-fuel ratio, and the burner controller is also required to provide functions such as ignition and flame detection.

[0033] Before the burner works, set the maximum working cycle time Tonmax and the minimum working cycle time Tonmin of the burner combustion.

[0034] Such as figure 1 As shown, after the controller receives the actual temperature measured by the temperature sensor, it compares it with the set temperature to obtain a temperature difference signal, performs PID calculation, and outputs...

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Abstract

The invention provides a method for controlling pulse combustion of multiple burners of a fuel gas furnace. According to the method, the differential value between a set temperature and the actual temperature inside the fuel gas furnace is calculated through a controller, a temperature difference signal is calculated through a PID, is converted into a multi-time-sequence variable pulse signal by combining the maximum work period of working of the burners, and is output as a control signal, the multi-time-sequence variable pulse signal controls the opening and closing states of an air valve and a fuel gas valve according to different heating modes and controls the work period of the burner controller. The method enables the burners to burn according to a certain rule, thereby effectively controlling the combustion temperature, guaranteeing temperature uniformity inside the fuel gas furnace and improving combustion efficiency.

Description

technical field [0001] The invention relates to a burner combustion method, in particular to a multi-burner pulse combustion method for a heat treatment gas furnace. Background technique [0002] With the wide use of industrial natural gas fuel, the types and numbers of gas furnaces are increasing, and the traditional burner combustion control method has been difficult to adapt to the higher heat treatment temperature process requirements. [0003] At present, in terms of combustion control of gas furnaces, two methods are mainly used: continuous flame control and large and small fire control. Large and small fire combustion control is divided into simple on-off pulse combustion and fixed pulse width combustion. The former lacks orderly and regular distribution of heat energy and can only meet part of the temperature control requirements of gas furnaces. The latter has certain deficiencies in balanced combustion. [0004] In order to achieve higher heat treatment process re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N5/02
Inventor 顾志芳
Owner JIANGNAN UNIV
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