# US 5,086,716 A · System, apparatus and method for disposing of solid waste

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- Number: US 5,086,716 A
- Document ID: US5086716A
- Status: Granted
- Kind: A
- Application number: 07/516,210
- Filed: 1990-04-30
- Granted: 1992-02-11
- Earliest claimed: 1990-04-30
- Assignees: Industrial Waste Management, Inc.
- Inventors: Fred A. Lafser, Jr.
- Web page: https://patentgrep.com/patent/US5086716A

## CPC

- C04B 7/4438: {the fuel being introduced directly into the rotary kiln}
- F23G 5/20: having rotating or oscillating drums
- F23G 5/448: {in which the waste is fed in containers or the like}
- F23G 2205/20: using airblast or pneumatic feeding
- F23G 2206/201: with an industrial furnace
- F23G 2209/12: Sludge, slurries or mixtures of liquids
- F23G 2209/20: Medical materials
- F23G 2209/28: Plastics or rubber like materials
- Y02E 20/30: Technologies for a more efficient combustion or heat usage
- Y02P 40/125: Fuels from renewable energy sources, e.g. waste or biomass
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- F23G: CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A system for disposing of solid waste which recovers a portion of the energy and materials value of the waste. The system includes a plurality of sealable containers for the solid waste, and a rotary kiln. An air cannon propels the containers into the vessel on a trajectory generally parallel to the axis of the vessel. The kiln is of the type including a cylindrical vessel containing materials to be processed therein. The vessel has first and second longitudinally opposite ends, and rotates about its longitudinal axis. A burner heats gases in the interior of the vessel for processing the material in the vessel. The temperature in the vessel progressively increases from the first end to the second end of the kiln.

## Claims

### Claim 1

A method for disposing of solid waste in a rotary kiln of the type which produces cement, the kiln comprising a rotating, generally cylindrical vessel having first and second longitudinally opposite ends and means for heating gases in the interior of the vessel to progressively greater temperatures from one end to the other end for processing material in the vessel, the interior of the kiln including at least two zones, a calcining zone wherein the temperature ranges from approximately 950.degree. C. to 1200.degree. C. and a clinkering zone wherein the temperature ranges from above 1200.degree. C. to approximately 1925.degree. C., the method comprising the step of delivering pre-packaged sealed containers of solid waste to the clinkering zone inside the vessel.

### Claim 2 (depends on 1)

A method as set forth in claim 1 wherein the step of delivering the containers comprises the step of propelling the containers a substantial distance horizontally into the vessel on a trajectory generally parallel to the longitudinal axis of the vessel.

### Claim 3 (depends on 1)

A method as set forth in claim 1 wherein the rotary kiln is of the type which produces cement, the kiln having a port in one end, and wherein the step of delivering the containers comprises the steps of loading one of the containers in propelling means located generally adjacent the port, and triggering said propelling means thereby propelling the container out of said propelling means, through the port and to the clinkering zone of the vessel on a trajectory generally parallel to the axis of the vessel.

### Claim 4

A method for disposing of solid waste in a rotary kiln of the type which produces cement, the kiln comprising a rotating, generally cylindrical vessel having first and second longitudinally opposite ends and means for heating gases in the interior of the vessel to progressively greater temperatures from one end to the other end for processing material in the vessel, the interior of the kiln including at least two zones, a calcining zone wherein the temperature ranges from approximately 950.degree. C. to 1200.degree. C. and a clinkering zone wherein the temperature ranges from above 1200.degree. C. to approximately 1925.degree. C., the method comprising the steps of packaging solid waste in sealable containers, and delivering the containers to the clinkering zone inside the vessel.

### Claim 5 (depends on 4)

A method as set forth in claim 4 wherein the step of delivering the containers comprises the step of propelling the containers a substantial distance horizontally into the vessel on a trajectory generally parallel to the axis of the vessel.

### Claim 6 (depends on 4)

A method as set forth in claim 4 wherein the rotary kiln is of the type which produces cement, the kiln having a port in one end, and wherein the step of delivering the containers comprises the steps of loading one of the containers in propelling means located generally adjacent the port, and triggering said propelling means thereby propelling the container out of said propelling means, through the port and to the clinkering zone of the vessel on a trajectory generally parallel to the axis of the vessel.