Continuous ignition source for controlled disposal of combustible polymer waste in a fluidized bed reactor
Method of cleaning contaminated soil
Perforated reactor tube and method for forming a fluid wall in a reactor
Process for the disposal of settled sludge derived from a biological sewage-disposal plant
Process and apparatus for separating organic contaminants from contaminated inert materials
Feed system for incineration of contaminated material
Method for removing organic contaminants from soils
Process and apparatus for decontaminating air
ApplicationNo. 751175 filed on 11/15/1996
US Classes:588/320, By oxidation; by combustion (EPO/JPO)134/1, Including application of electrical radiant or wave energy to work405/263, Chemical588/405, Organic substances (EPO/JPO)588/900APPARATUS
ExaminersPrimary: Straub, Gary P.
Attorney, Agent or Firm
International ClassA63D 003/00
Foreign Application Priority Data1992-06-22 ID
AbstractA method for treating contaminated solids such as contaminated soil or sludge includes feeding the solids into a preheater and pneumatically conveying the solids through the preheater by preheated primary air into and through an oxidation chamber by cocurrent flow. Secondary air is directed into the oxidation chamber through a plurality of perforations in the wall of the oxidation chamber to combine with and sustain the fluidized state of the solid-gas mixture. The primary air is preferably produced by an air blower which blows the air through a preheater to produce hot air. The temperature of the fluidized bed is controlled by the temperature of the primary air. The temperature should be hot enough that the lighter hydrocarbons spontaneously ignite in the oxidation chamber. The exothermic combustion causes the remaining organic material present in the contaminated solids to then vaporize and burn. The product of this process, termed flash oxidation, is a mixture of treated solids, excess hot gas and gaseous and solid oxidation products. This mixture is separated such as by one or more cyclone separators or a baghouse to produce treated solids and process gas in a once-through process with essentially no recycle of solids.