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Boiler each secondary air nozzle non-repelling board wind controlling method

A technology of secondary air outlet and secondary air, which is applied in the combustion method, transportation of non-flammable liquid/gas, combustion equipment, etc., can solve the problem that there is no simple and feasible method for secondary air adjustment.

Inactive Publication Date: 2010-03-17
杨爱生
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

At present, there is no simple and feasible method for adjusting the secondary wind both at home and abroad.

Method used

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Embodiment Construction

[0005] When this method is implemented, it is necessary to determine the position of the tuyere for reducing the secondary air volume of the boiler according to the boiler capacity, burner type, coal combustion characteristics, and the position of the primary tuyere where powder feeding should be reduced and stopped during load reduction, and the boiler The secondary air that does not need to be adjusted when the load changes and the secondary air that needs to be adjusted are respectively supplied by two air ducts. It is also possible to formulate a scheme for secondary air adjustment when the boiler load changes based on the mature experience of the existing boilers of the same type in terms of secondary air adjustment. The air volume of the secondary air outlet that often needs to be adjusted is divided into two parts (if the secondary air outlet needs to be stopped when the boiler is under low load, it can be ignored), a part of the boiler is reserved at any load, and a par...

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Abstract

The invention relates to a baffleless wind control method for every secondary vent of a boiler which is mainly used in a DC (direct current) burner boiler. The method is that: the secondary wind of the boiler is divided into two parts, one part needs to be regulated when the boiler load is changed, the other part does need to be regulated and must be remained; every secondary vent is not providedwith a baffle, and only the secondary wind to be regulated is provided with and controlled by a general baffle. When the boiler load changes, the general baffle controls the flow of the secondary windsend into the boiler, and maintains the wind pressure, so that the unregulated secondary wind still has a comparatively high wind speed, and the good air power condition can be maintained even in lowload. The implementation of the invention can solve the problems that: the differences of wind flows and wind speeds of the secondary vent corresponding to each corner existed in the DC burner boilerare larger, the regulation of secondary winds is troublesome, and the secondary winds can not be maintained in a low burner load. The invention integrates energy conversation, environment protective,low-load stable combustion and easy and rapid regulation, which is beneficial to the combustion of coals of poor quality and the peak regulation of thermal plants.

Description

technical field [0001] The invention belongs to the specialty of boiler engineering, is mainly used for once-through burner boilers, and is also useful for boilers and cyclone furnaces equipped with swirl burners. Background technique [0002] Each secondary air outlet of the existing boiler is equipped with an air volume baffle, and the effect of the secondary air baffle is to adjust the air volume and secondary air speed of each secondary air outlet. The adjustment of the air volume is mainly to make the combustion of the fuel have a reasonable amount of air. The adjustment of the secondary air speed is to enable the fuel to be heated by the backflow hot flue gas to burn as soon as possible and to fully mix the fuel and air, and to make the secondary air rigid. Enhanced to prolong its residence time in the furnace and stabilize the flame. The air volume and wind speed of the secondary air are closely related to the rapid combustion and burnout of fuel. The air volume adju...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L9/00
Inventor 杨爱生
Owner 杨爱生
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