Patent EP0050519A2 successfully refreshed from Google Patents.
EP0050519A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fluidized bed combustor
Assignee: BP PLC
•
Filing: 1981-10-20
•
Granted: —
•
Expires: 2001-10-20
Abstract
Abstract A fluidized bed combustion apparatus includes a combustion chamber (30) having a distributor plate assembly (33) including an inverted frustopyramidal surface (42) with slots (49) and offset shields (51) thereover to form laterally oriented air flow openings into the combustion chamber from a first plenum (36) for debris particle classification along said surface. At the bottom of each frustopyramidal surface is an outlet for classified debris. Air flow riser tubes (50, 52) project up from a second plenum (38) to a position above said surface. Forced air is supplied to the slots and the risers, with means (62) to regulate relative flow to them. Projecting down from the debris outlets are drop tubes (46) having cooling fins (47), such tubes connecting to inlets of an auger conveyor (102). The auger conveyor has a coolant-cooled housing (104) and a coolant-cooled auger.
Inventors
- 👤 Willard Paul Smith
- 👤 Bruce Russell Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:23
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; F; F23; F23C; F23C10/00; F23C10/18; F23C10/20; F23C10/24; F23C10/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A fluidized bed combustion apparatus comprising: a combustion chamber (30) a distributor plate assembly (33) at the bottom of the combustion chamber, slots (49) in the distributor plate assembly to form air flow openings to the combustion chamber, air flow riser tubes (50,52) projecting up through the plate assembly to a position elevated thereabove and having air inlets at the bottom and outlets at the top, and means (64) for supplying air to the slots and to the risers.
Claim 2
Dependent Claim
79 words
A fluidized bed combustion apparatus comprising: a combustion chamber (30) a distributor plate assembly (33) at the bottom of the combustion chamber, slots (49) in the distributor plate assembly to form air flow openings to the combustion chamber, air flow riser tubes (50,52) projecting up through the plate assembly to a position elevated thereabove and having air inlets at the bottom and outlets at the top, and means (64) for supplying air to the slots and to the risers.
Claim 3
Dependent Claim
24 words
Combustion apparatus as claimed in claim 1 which includes means (62) for regulating the relative air flow to the slots and to the risers.
Claim 4
Dependent Claim
58 words
Combustion apparatus as claimed in claim 2 which includes a first air plenum (36) in communication with the slots and a second air plenum (38) into which the air inlets at the bottom of the riser tubes open, the air flow central means regulating the relative flow from the air supply means for the first and second plenus.
Claim 5
Dependent Claim
23 words
Combustion apparatus as claimed in claim 3 in which the air flow control means comprises a movable baffle (62) between the two plenms.
Claim 6
Dependent Claim
59 words
Combustion apparatus as claimed in any of claims 1 to 4 in which the distribution plate assembly includes a distributor plate with downwardly sloping surfaces (42) in which the slots are formed, the slots having vertically spaced shields (51) thereabove to form laterally oriented air flow openings to the combustion chamber to cause particle classification along the sloped surfaces.
Claim 7
Dependent Claim
29 words
Combustion apparatus as claimed in claim 4 or claim 5 in which the slots and shields are elongated with the long dimensions thereof oriented down the respective sloping surfaces.
Claim 8
Dependent Claim
22 words
Combustion apparatus as claimed in claim 4 or claim 5 or claim 6 in which the sloping surfaces form an inverted frustopyramid.
Claim 9
Dependent Claim
36 words
Combustion apparatus as claimed in any of claims 4 to 7 which includes a debris discharge opening (44) at the bottom of the sloping surfaces and a drop tube (46) leading downwardly from the discharge opening.
Claim 10
Dependent Claim
16 words
Combustion apparatus as claimed in claim 8 in which the drop tube has fins (47) thereon.
Claim 11
Dependent Claim
124 words
A fluidized bed combustion apparatus comprising: a fluid bed combustion chamber (30) having a bottom distribution plate (33) with sloped bottom walls (42) terminating in ash outlet drop tubes (46) projecting downwardly: cooling fins (47) on said drop tubes exposed to ambient atmosphere; an auger conveyor (102) beneath said drop tubes, having a housing (104) with inlets thereinto communicant with said drop tubes to receive hot debris therefrom, and an outlet; said housing having a coolant flow chamber there-around; an auger in said housing for advancing hot debris from said inlets to said outlet, and coolant flow passages in said auger, whereby hot debris can be discharged from said combustion chamber through said drop tubes, into said auger conveyor for transfer to said outlet.
Claim 12
Dependent Claim
124 words
A fluidized bed combustion apparatus comprising: a fluid bed combustion chamber (30) having a bottom distribution plate (33) with sloped bottom walls (42) terminating in ash outlet drop tubes (46) projecting downwardly: cooling fins (47) on said drop tubes exposed to ambient atmosphere; an auger conveyor (102) beneath said drop tubes, having a housing (104) with inlets thereinto communicant with said drop tubes to receive hot debris therefrom, and an outlet; said housing having a coolant flow chamber there-around; an auger in said housing for advancing hot debris from said inlets to said outlet, and coolant flow passages in said auger, whereby hot debris can be discharged from said combustion chamber through said drop tubes, into said auger conveyor for transfer to said outlet.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.