US 4,829,911 AGranted

Pollution-free, resource recovery, garbage disposal/fuel burning plant

OwnerJay P. Nielsoninventor

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Abstract

The invention is a method and apparatus for burning combustibles, particularly garbage and coal, in such a manner as to prevent the venting of unwanted pollutants into the atmosphere and for recovering valuable resources. The combustibles are burned in a rotating inclined furnace; solids and molten metals are extracted at the discharge end of the furnace; the discharged gases are passed through a boiler for extracting heat therefrom and generating steam; the discharged gases are liquified by sequential cooling and the so-liquified products removed while preventing discharge of gases into the atmosphere; the remaining gases are passed through a second boiler for further extraction of heat and steam generation and further extraction of liquified products; and the effluent gases are passed into subsequent apparatus for removing any remaining pollutants and for the recovering of resources in accordance with Nielson U.S. Pat. No. 4,728,341.

Claims34

Dependent claims

A method of burning solid combustibles containing potential atmospheric pollutants and of recovering valuable resources from said combustibles while preventing the release of pollutants into the atmosphere, comprising the steps of introducing said combustibles through an airlock into a furnace substantially sealed against the atmosphere;

introducing combustion-supporting fluid into the furnace;
burning said comubustibles at a temperature high enough to melt at least some of the inorganic components contained therein;
removing and recovering solid components from said furnace through a gas lock;
removing and recovering molten components from said furnace through a conduit and valve;
passing high temperature gaseous products of combustion from said furnace through heat exchanger means utilizing boiler tubes carrying the gaseous products surrounded by water to generate steam as a useful product;
removing and recovering liquid condensates from the boiler tubes as the gases cool;
introducing effluent gases from the boiler tubes into a pipeline;
progressively removing heat from said effluent gases as they flow along said pipeline by passing coolant fluid along respective longitudinal portions of said pipeline in heat exchange relationship therewith;
refrigerating at least a portion of said coolant fluid so that the extend of heat removal along certain of said portions is such as to change the state of various potential atmospheric pollutants and other constituents from the gaseous to the liquid or solid phase;
and separating and recovering said pollutants and other constituents in their liquid or solid form from the residual gas substantially at said respective portions of said pipeline.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/229,237Filed 8 Aug 1988
Granted: 16 May 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification26 codes

F23J 15/06
Arrangements of devices for treating smoke or fumes: of coolers
B09B 3/40
Destroying solid waste or transforming solid waste into something useful or harmless: involving thermal treatment, e.g. evaporation
F23G 5/006
Incineration of waste ; Incinerator constructions; Details, accessories or control therefor: general arrangement of incineration plant, e.g. flow…
F23G 5/46
Details; Accessories: recuperation of heat

Family

No related US applications are recorded in the indexed filing history.

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