The Boiler Cleaning Control Subloop

The paper traces the automation of controls of boiler-cleaning devices from the earliest patents to the present. The advantages of automation are described as reduction in man-hours of boiler-cleaning supervision, elimination of individuality in cleaning techniques, optimization of use of blowing medium, and increase in steam generator efficiency. Six types of control of the subloop are described. An example is given to assist designers in evaluating savings from automation of the cleaning subloop.