Ignition boosting method for gas boiler

A technology for gas-fired boilers and boilers, which is applied in the field of ignition and boosting of boilers, can solve the problems of collapse of convection flue, deflagration of furnace, and difficulty in safe production of boilers, and achieves the effect of avoiding deflagration accidents and normal combustion.

Inactive Publication Date: 2006-08-16
山西焦化股份有限公司
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AI Technical Summary

Problems solved by technology

[0003] This boiler is the first to be produced and used in China, and there is no reference in the same industry for the best parameters for boiler ignition and boosting pressure, resulting in improper control of operating parameters such as furnace negative pressure and gas regulating door opening during the use of the boiler , the combustible gas composition in the gas-fired boiler exceeds the explosion limit, causing the furnace to deflagrate, which brings many difficulties to the safe production of the boiler, and in severe cases, accidents that cause the convection flue to collapse and the steel frame to be slightly deformed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The following is an implementation process of igniting and boosting the UG-35 / 3.82-Q boiler produced by Wuxi Boiler Factory.

[0012] Firstly, in the purging stage of the boiler, the opening of the hot air baffle is set to 30%, the opening of the blower baffle is set to 40%, the opening of the induced draft fan baffle is set to 16%, and the negative pressure of the furnace is adjusted to -90Pa. After purging for 10 minutes and passing the test, adjust the opening of the blower baffle to 20%, the opening of the induced draft fan baffle to 1.2%, the opening of the hot air baffle to 15%, the negative pressure of the furnace to -23Pa, and start the program control Ignition, when the fire is detected, open the gas regulating door to 5%. After the combustion is stable, gradually open the gas regulating door to 8%. At the same time, adjust the negative pressure of the furnace to -24Pa. Fire on one side.

[0013] After the combustion on both sides is stable, start to raise the...

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Abstract

The present invention relates to the ignition and pressure lifting method for medium temperature and medium pressure gas burning boiler with coke oven gas as fuel. During ignition, lifting pressure and normal operation, hot blast baffle opening, blower baffle opening, induced draft fan baffle opening, gas regulating door opening and negative hearth pressure in the boiler are set and regulated, so as to control the inflammable gas density inside the boiler during ignition and lifting pressure below the explosion limit and to avoid boiler explosion accident. The ignition and pressure lifting method of the present invention is suitable for all types of gas burning boilers with PLC program controlled ignition system.

Description

technical field [0001] The invention relates to an ignition boosting method for a boiler, in particular to an ignition boosting method for a medium-temperature and medium-pressure gas-fired boiler using coke oven gas as fuel. Background technique [0002] The UG-35 / 3.82-Q boiler produced by Wuxi Boiler Factory is the first medium-temperature and medium-pressure gas furnace in my country that uses low calorific value and low-pressure coke oven gas as the fuel, and its thermal efficiency is as high as 91%. The boiler is a natural circulation chamber combustion furnace with double drums horizontally arranged in the open air. The furnace part is a membrane water-cooled wall. The burner is arranged on the front wall of the lower part of the furnace. For the secondary superheater, a convection tube bundle is arranged between the upper and lower drums, and a primary air preheater and a primary economizer are arranged in the tail flue. The boiler adopts surface cooling method to co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N5/00F23N3/00
Inventor 卫正义张国富刘玉康孟秀芳张保盛薛晓敏赵俊
Owner 山西焦化股份有限公司
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