JP2011017524A5

JP2011017524A5 -

Info

Publication number: JP2011017524A5
Application number: JP2010107894A
Authority: JP
Filing date: 2010-05-10
Publication date: 2013-06-27

Claims

A method of cleaning an air preheater, wherein the air preheater includes adjacent passages that guide air and flue gas and are at a selected radial distance from an outer periphery of a rotor that rotates about an axis. The rotor and soot blowing medium is selected from the outer periphery of the rotor such that as the rotor rotates, soot blowing media can be blown from the soot blowing device into the rotor passage through the end of the soot blowing device. In a method of cleaning an air preheater, which is an air preheater of the type comprising a soot blower having an end that can be disposed adjacent to a radial distance
Placing the end of the soot blower adjacent to a passage at a first radial distance from the outer periphery of the rotor ;
As the passage at said first radial distance from the outer circumference of the rotor passes through the end portion of the soot blower, a step of rotating the rotor at selected velocity, the selection Rotating the rotor corresponding to the rotor partial tangential speed that passes through the end of the soot blower ;
While rotating the rotor in front hexene-option velocity, the method comprising blowing a sootblowing medium through said passageway at said first radial distance from the outer periphery of said rotor,
Moving the soot blower in stages so that the end of the soot blower is at a different radial distance from the outer periphery of the rotor after each step movement ;
Changing the rotational speed of the rotor after each step movement so that the tangential speed of the rotor portion passing through the end of the soot blower is within 15% of the selected tangential speed ;
While rotating the rotor, after each stepwise movement of the end portion of the soot blower, and a step of blowing a sootblowing medium through said passageway, method of cleaning the air preheater.

The method of cleaning an air preheater according to claim 1, wherein the tangential speed is constant during a cleaning process.

The method for cleaning an air preheater according to claim 1, wherein the soot blowing medium is air, water, or steam.

The method of cleaning an air preheater according to claim 1, wherein some, but not all, passages in the rotor are blown with soot blowing media.

The method for cleaning an air preheater according to claim 1, wherein the soot blowing device first blows a soot blowing medium through an innermost passage of the rotor .

The method for cleaning an air preheater according to claim 1, wherein the soot blowing device first blows a soot blowing body through an outermost passage of the rotor .