# US 4,714,031 A · Combustor feeding arrangement

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- Number: US 4,714,031 A
- Document ID: US4714031A
- Status: Granted
- Kind: A
- Application number: 07/000,510
- Filed: 1987-01-05
- Granted: 1987-12-22
- Earliest claimed: 1987-01-05
- Assignees: Westinghouse Electric Corp.
- Inventors: John T. Healy; Joel W. Johnson
- Web page: https://patentgrep.com/patent/US4714031A

## CPC

- F23M 11/02: Preventing emission of flames or hot gases, or admission of air, through working or charging apertures
- F23G 5/20: having rotating or oscillating drums
- F23G 5/444: {for solid waste (F23G5/448 takes precedence)}
- F23G 2203/205: with water-cooled wall
- F23G 2203/207: with air supply ports in the sidewall
- F23G 2205/10: using ram or pusher
- F23G 2205/16: using chute
- F23G 2205/18: using airlock systems
- F23M: CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23G: CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION

## Abstract

An arrangement for feeding material to the open end of a combustor including a vertical chute leading to a doorway to the combustor which is normally closed by a biased door, and a stepped ram reciprocating at the bottom of the chute for feeding material through the door and into the combustor.

## Claims

### Claim 1

A feeding arrangement for a combustor having an open end for receiving combustible material comprising, in combination, a wall closing said open end of said combustor and defining a doorway, a generally vertical chute including said wall, leading to said doorway and having a lower floor aligned with the bottom of the doorway, a ram mounted for reciprocation over said lower floor and into and through said doorway, a door mounted to normally close said doorway and being movable to open the doorway when pushed by said ram and combustible material, means for biasing said door toward a closed position, and means for reciprocating said ram, said ram, door and biasing means cooperating to positively push material into and through said doorway by only reciprocating said ram.

### Claim 2 (depends on 1)

The combination of claim 1 in which said door is pivoted to swing up from said floor and away from said ram, and said biasing means including a hydraulic actuator providing adjustable pressure to maintain the doorway closed until opened under the force of said ram.

### Claim 3 (depends on 2)

The combination of claim 2 in which said actuator is double acting so that the actuator can be operated to open said door for observation or servicing.

### Claim 4 (depends on 1)

The combination of claim 1 in which said ram is stepped and has a first face adjacent said floor and a second face above said first face and spaced from said door.

### Claim 5 (depends on 4)

The combination of claim 4 in which said ram has sloped sides so that the top surfaces of the ram are smaller than the ram base.

### Claim 6

A feeding arrangement for a combustor having an open end for receiving combustible material comprising, in combination, a wall closing said open end of said combustor and defining a doorway, a generally vertical chute including said wall, leading to said doorway and having a lower floor aligned with the bottom of the doorway, a ram mounted for reciprocation over said lower floor into and through said doorway, said ram being stepped and having a first face adjacent said floor and a second face above said first face and spaced from said doorway, the sides of the said ram being sloped so that the top surfaces of the ram are smaller than the ram base, and means for reciprocating said ram, said ram, door and biasing means cooperating to positively push material into and through said doorway by only operating said ram.