US 4,785,748 A · Method sudden expansion (SUE) incinerator for destroying hazardous materials & wastes

Abstract

The method of incinerating hazardous materials and fluidizable wastes, such as liquids, gases, entrained solid particles, fumes and slurries, utilizes an incinerator in the form of a sudden expansion burner. The incinerator has a relatively small diameter cylindrical inlet pipe connected by a circular plate to a relatively larger diameter elongated cylindrical combustion chamber. A waste injection line passes into the incinerator adjacent the inlet pipe for transfer of incineratable waste therethrough and into the upstream end of the combustion chamber. Air inlets connected to a blower also terminate adjacent the inlet pipe for supplying air at a high flow rate to the combustion chamber. One or more fuel nozzles extend through the plate into the combustion chamber to provide an overstoichiometric concentration of fuel adjacent the plate. The fuel is ignited through an electrically powered, fuel supplied ignitor extending into the combustion chamber through the inlet pipe. The supply of fuel, waste, air and igniter fuel are monitored. Total combustion of hazardous waste materials is carried very rapidly out by utilizing the present method and incinerator.

Claims16

Dependent claims

An improved method of incinerating fluidizable materials, said method comprising:

(a) providing a sudden expansion burner having a housing with a relatively small diameter waste, air and fuel inlet component, a relatively larger diameter, elongated combustion chamber, and a plurality of fuel nozzles and waste injection nozzles extending radially about said inlet component,
(b) introducing air into said inlet component,
(c) injecting fluidized waste material from said waste injection nozzles directly inwardly to a combustion zones at the axis of rotation of said burner housing and combustion chamber and in an area immediately downstream of said burner housing,
(d) simultaneously injecting fuel from said fuel nozzles directly inwardly to said combustion zone,
(e) igniting the air, fuel and waste material in said combustion zone,
(f) passing said fluidized material and fuel downstream through said zone until consumed by combustion;
and,
(g) continuing to inject additional of said air, fuel and fluidizable material until a predetermined amount of said fluidizable material is totally flame consumed in said burner without production of toxic or polluting gases.

5 more elements

An improved incinerator for hazardous waste materials, said incinerator comprising, in combination:

(a) a housing having a relatively small diameter waste and air inlet component, a relatively larger diameter elongated combustion chamber, and a step plate joining said inlet component to said combustion chamber;
(b) a fluidized waste injection line connected to said inlet component, and having an outlet nozzle extending radially about said inlet component for injecting fluidized waste directly inwardly to a combustion zone at the axis of rotation of said housing and combustion chamber in an area immediately downstream of said housing;
(c) at least one air inlet line connected to said inlet component and to a blower for supplying air at elevated pressure to said combustion zone;
(d) fuel injector nozzles extending through said plate and radially about said inlet component for injecting fuel directly inwardly to said combustion zone;
(e) fuel supply lines connected to said nozzles;
(f) a fuel ignition device extending through said inlet component into said combustion chamber adjacent said nozzles;
and,
(g) means for controlling the supply of said air, fuel and waste into said incinerator.

5 more elements

Dependencies are inferred from the claim text.

Method sudden expansion (SUE) incinerator for destroying hazardous materials & wastes

Life of this patent

Method sudden expansion (SUE) incinerator for destroying hazardous materials & wastes

Life of this patent

Abstract

Claims16