Method for adjusting combustion of W flame furnace by changing quantity of oil secondary air

Abstract

The invention discloses a method for adjusting combustion of a W flame furnace by changing quantity of oil secondary air, relates to a method for combustion of a W flame furnace, and solves the problem that the fly ash combustible content is over high when the flame combustion technology of the prior W flame furnace designed by Foster Wheeler Company is used. The method is realized by the following steps: when a boiler works normally after an oil gun (3) ignites, opening an air door (9) in a third air layer (C), and continually introducing oil secondary air, wherein the quantity of the introduced oil secondary air is 12 to 40 percent of the quantity of secondary air; and the opening degree of the air door (9) is between 20 and 100 percent. By opening the air door (9) in the third air layer (C) and continually introducing the oil secondary air into a combustion chamber, the combustion condition in the combustion chamber is changed so that a ratio of an upper arch momentum to a lower arch momentum is 6:1-9:1, thereby increasing coal dust stroke and prolonging the detention time of coal dust. The method is favorable for burnout and can effectively reduce the fly ash combustible content.

Description

The method of adjusting the combustion of W flame furnace by changing the oil secondary air volume technical field The invention relates to a method for burning in a W flame furnace. Background technique The existing W-shaped flame boiler designed by Foster Wheeler Company in the United States has a high combustible content in the fly ash during use. The combustion chamber of the W flame boiler is divided into an upper burnout chamber 1 and a lower combustion chamber 2, the front wall and the rear wall between the burnout chamber 1 and the combustion chamber 2 are furnace arches 4, and each furnace arch 4 A number of double-cyclone pulverized coal separation burners are arranged on the top, and the pulverized coal airflow sprayed downward stretches downward after being ignited at a speed of 15-25m / s, and turns upward after meeting the secondary air at the lower part of the combustion chamber 2. Rising along the central axis of the inner cavity of the combustion chamber 2,...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem that the content of fly ash combustibles is too high during the use of the flame combustion technology of the existing W-type flame boiler designed by Foster Wheeler Company, and to provide a method to adjust the oil secondary air volume by changing W flame furnace combustion method

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