# US 5,700,431 A · Method and a device for monitoring the internal circulation in a fluidized bed reactor, and a reactor provided with such a device

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- Number: US 5,700,431 A
- Document ID: US5700431A
- Status: Granted
- Kind: A
- Application number: 08/731,005
- Filed: 1996-10-09
- Granted: 1997-12-23
- Earliest claimed: 1994-07-28
- Assignees: GEC Alsthom Stein Industrie
- Inventors: Silvestre Suraniti; Jean-Xavier Morin
- Web page: https://patentgrep.com/patent/US5700431A

## CPC

- B01J 8/1809: {Controlling processes}
- F23C 10/28: Control devices specially adapted for fluidised bed, combustion apparatus
- F28D 13/00: Heat-exchange apparatus using a fluidised bed
- F28F 27/00: Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus (control arrangements in general G05)
- H01R 13/6581: Shield structure
- B01J 2208/00044: Temperature measurement
- B01J 2208/00548: Flow
- B01J 2208/00654: by measures relating to the particulate material
- B01J 2219/187: inclined at an angle to the horizontal or to the vertical plane
- H01R 24/62: Sliding engagements with one side only, e.g. modular jack coupling devices
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- F23C: METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR (burners F23D)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A monitoring device for continuously monitoring the internal circulation flow-rate of solid particles in a circulating fluidized bed reactor including a bottom zone into which the fluidization gas is injected and a top zone surrounded by walls. The device includes a sampling tank for sampling internal circulation of solids, which tank is fixed against one of the walls of the reactor and is provided with a fluidization device. A removal pipe is provided for removing the solids from the tank and conveying them to a measuring device for measuring the flow-rate of the solids. A return pipe is provided for returning the solids from the measuring device to the inside of the reactor.

## Claims

### Claim 1

A method of continuously monitoring the internal circulation flow-rate of solid particles in a circulating fluidized bed reactor including a bottom zone into which a fluidization gas is injected, and a top zone surrounded by walls, said method comprising continuously sampling and locally measuring by an external measuring device, the flow-rate of solids running down along the walls.

### Claim 2

A monitoring device for continuously monitoring the internal circulation flow-rate of solid particles in a circulating fluidized bed reactor including a bottom zone into which the fluidization gas is injected, and a top zone surrounded by walls, said monitoring device comprising means for continuously sampling and locally measuring by an external measuring device the flow-rate of solids running down along the walls.