# US 2014/0150735 A1 · Boiler having a fluidized bed heat exchanger

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- Number: US 2014/0150735 A1
- Document ID: US20140150735A1
- Status: Published application
- Kind: A1
- Application number: 14/087,435
- Filed: 2013-11-22
- Published: 2014-06-05
- Earliest claimed: 2012-11-23
- Assignees: ALSTOM Technology Ltd
- Applicants: Alstom Technology Ltd
- Inventors: Florent CARUZZI; CHRISTIAN ENAULT; ALAIN QUARANTA; THIERRY GURIEC
- Web page: https://patentgrep.com/patent/US20140150735A1

## CPC

- F22B 21/34: built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
- F22B 31/0092: {with a fluidized heat exchange bed and a fluidized combustion bed separated by a partition, the bed particles circulating around or through that partition}
- F22B 37/205: {Supporting and spacing arrangements for tubes of a tube bundle}
- F28D 7/082: {with serpentine or zig-zag configuration}
- F28D 13/00: Heat-exchange apparatus using a fluidised bed
- F28F 9/013: for tubes or tube-assemblies
- F22B: METHODS OF STEAM GENERATION; STEAM BOILERS
- 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)

## Abstract

The invention relates to a fluidized bed heat exchanger. The heat exchanger includes a plurality of tubes forming a tube bundle. Each tube follows a vertical boustrophedon path. The tubes are supported by at least two vertical supporting devices placed on both sides of the tube bundle. Every vertical supporting device includes at least two vertical supports for fixing the tubes.

## Claims

### Claim 1

A boiler comprising a fluidized bed heat exchanger, the heat exchanger including a plurality of tubes forming a tube bundle, each tube following a vertical boustrophedon path, the tubes being supported by at least two vertical supporting devices placed on both sides of the tube bundle, characterized in that every vertical supporting device comprises at least two vertical supports for fixing the tubes.

### Claim 2 (depends on 1)

A boiler according to claim 1, wherein the boustrophedon path of each tube comprise horizontal portions, two consecutive horizontal portions being linked together by a vertical portion thus forming a bend between the horizontal portions.

### Claim 3 (depends on 1)

A boiler according to claim 1, wherein one supporting device is located on the left side of the tube bundle and in that one supporting device is located on the right side of the tube bundle.

### Claim 4 (depends on 1)

A boiler according to claim 1, wherein the vertical supports are vertical tubes.

### Claim 5 (depends on 4)

A boiler according to claim 4, wherein the tubes forming the vertical supports are cooled or uncooled.

### Claim 6 (depends on 2)

A boiler according to claim 2, wherein for at least one supporting device, each horizontal portion of each tube of the heat exchanger is fixed to only one vertical support of the supporting device.

### Claim 7 (depends on 6)

A boiler according to claim 6, wherein for each supporting device, each horizontal portion of each tube of the heat exchanger is fixed to only one vertical support of the supporting device.

### Claim 8 (depends on 2)

A boiler according to claim 2, wherein, for at least one supporting device, two consecutive horizontal portions of each tube of the heat exchanger (3A) are not fixed to the same vertical support of the supporting device.

### Claim 9 (depends on 8)

A boiler according claim 8, wherein, for each supporting device, two consecutive horizontal portions of each tube of the heat exchanger are not fixed to the same vertical support of the supporting device.

### Claim 10 (depends on 1)

A boiler according to claim 1, wherein, for each supporting device, each horizontal portion of tube of the heat exchanger is fixed to only one vertical support of the supporting device and in that, for each supporting device, two consecutive horizontal portions of each tube of the heat exchanger are not fixed to the same vertical support of the supporting device.

### Claim 11 (depends on 1)

A boiler according to claim 1, wherein the boiler comprises a furnace in which combustion of solid particles is sustained and in that the fluidized bed heat exchanger is placed outside the furnace.