# US 4,864,811 A · Method for destroying hazardous organics

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- Number: US 4,864,811 A
- Document ID: US4864811A
- Status: Granted
- Kind: A
- Application number: 07/098,785
- Filed: 1987-09-21
- Granted: 1989-09-12
- Earliest claimed: 1987-09-21
- Inventors: William C. Pfefferle
- Web page: https://patentgrep.com/patent/US4864811A

## CPC

- F23G 7/07: in which combustion takes place in the presence of catalytic material
- F02C 3/20: using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F23C 13/00: Apparatus in which combustion takes place in the presence of catalytic material (in a fluidised bed of catalytic particles F23C10/01; radiant gas burners using catalysis for flameless combustion F23D14/18)
- F23G 7/065: {using gaseous or liquid fuel}
- F23G 2206/203: with a power/heat generating installation
- F23G 2209/142: Halogen gases, e.g. silane
- F23G 2900/7011: Incinerating PCB-materials
- Y02E 20/12: Heat utilisation in combustion or incineration of waste
- F23G: CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F23C: METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR (burners F23D)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention provides a method for the destruction of hazardous carbonaceous wastes by the plug flow, thermal combustion of said wastes comprising (a) obtaining an intimate admixture of vaporized fuel and air, said admixture containing at least a stoichiometric amount of air, (b) passing said admixture to a plug flow combustion zone, and (c) effecting sustained and essentially complete combustion of said fuel under essentially adiabatic conditions to destroy said wastes and to form a combustion effluent of high thermal energy; said combustion being characterized by said fuel-air admixture having an adiabatic flame temperature such that that actual flame temperature in the combustion zone is greater than about 1350K.

## Claims

### Claim 1

A method for the destruction of fuels of hazardous carbonaceous wastes by the thermal combustion of said wastes comprising
(a) providing a catalytically stabilized plug flow combustion zone having inner flow channels and peripheral outer flow channels, the outer peripheral channels of which are blocked to thermally insulate the inner channels and prevent by-passing of non-combusted waste therethrough;
(b) obtaining an intimate admixture of vaporized hazardous carbonaceous wastes and air, said admixture containing at least a stoichiometric amount of air for substantially complete combustion of the wastes;
(c) passing said admixture to the insulated plug flow combustion zone; and
(d) effecting sustained and essentially complete combustion of said admixture under essentially adiabatic conditions to destroy said hazardous wastes and to form a heated combustion effluent essentially free of said hazardous wastes; said combustion being characterized by said fuel-air admixture having an adiabatic flame temperature such that each inner flow channel has an actual flame temperature in the combustion zone greater than about 1350.degree. K.

### Claim 2 (depends on 1)

The method of claim 1 wherein combustion is stabilized by a combustion catalyst.

### Claim 3 (depends on 2)

The method of claim 2 wherein said catalyst comprises a metal honeycomb structure.

### Claim 4

The method of operating a gas turbine by the thermal combustion of fuels of carbonaceous wastes comprising the steps of
(a) providing a catalytically stabilized plug flow combustion zone having inner flow channels and peripheral outer flow channels, the outer peripheral channels of which are blocked to thermally insulate the inner channels and to prevent by-passing of non-combusted waste therethrough;
(b) obtaining an intimate admixture of vaporized carbonaceous wastes and air, said admixture containing at least a stoichiometric amount of air;
(c) passing said admixture to the insulated plug flow combustion zone; and
(d) effecting sustained and essentially complete combustion of said admixture under essentially adiabatic conditions to destroy said hazardous wastes thereby forming a heated combustion effluent essentially free of said hazardous wastes; said combustion being characterized by said admixture having an adiabatic flame temperature such that each inner flow channel has an actual flame temperature in the combustion zone greater than about; 1350.degree. K.
passing said effluent from said combustion zone through a turbine to rotate said turbine.

### Claim 5 (depends on 4)

The method of claim 4 wherein combustion is stabilized by a catalyst.

### Claim 6 (depends on 5)

The method of claim 5 wherein said catalyst comprises a metal honeycomb and said honeycomb is sealed against by-passing of gases by attaching said catalyst to a metal seal ring and fastening said seal ring to the combustor wall.