Soot chaser

An automatic programmable cleaning system for heat transfer tubes in engine exhaust gas waste heat recovery boilers, said boilers having a waste heat exhaust inlet connected to heat transfer tubes for transporting the waste heat as an exhaust gas stream at a water vaporizing temperature through the heat transfer tubes to a waste heat exhaust outlet, and said automatic programmable cleaning system including at least one programmable timer electrically operating a solenoid valve to open the valve for a predetermined cycle and alloy water to be released in a water line in said system, said water line communicating with a nozzle means connected to said heat recovery boiler to allow water to be vaporized as a burst of pressure as it is injected into said waste heat exhaust gas stream during each of said predetermined cycles, whereby water injected into said waste heat exhaust gas stream is vaporized during each of said predetermined cycles as a burst of pressure so as to loosen carbon build-up in said heat transfer tubes and allow the carbon to be exhausted through the waste heat exhaust outlet along with exhaust gases in the waste heat exhaust gas stream.