[특허]Fines recirculating fluid bed combustor method and apparatus

[미국특허] Fines recirculating fluid bed combustor method and apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23D-001/00
출원번호	US-0134959 (1987-12-18)
발명자 / 주소	Goldbach Gary O. (San Jose CA) Cooper Jerry L. (Mountain View CA) Guillory John L. (Lafayette LA)
출원인 / 주소	Combustion Power Company (Menlo Park CA 02)
인용정보	피인용 횟수 : 9 인용 특허 : 8

초록 ▼

A fluidized bed combustor for burning solid fuel or dirty liquid fuels comprised of a bubbling fluid bed with tubes in the bed, an isothermal, non-heat extractive freeboard/recycle cyclone flow path, a hot recycle cyclone, a connective heat exchanger and a particle filter. The bubbling fluid bed is operated at low superficial velocities of 0.5 to 7 ft/sec and is composed of fine particulates 45 to 2000 microns in diameter with up to 40% less than 200 microns. Fines elutriated from the bed are isothermally recycled back to the bed resulting in high combustion efficiency and good sulfur oxide suppression from sorbents contained in the bed. The material recycled in one hour is equivalent to twice the weight of the bed. Ammonia injected upstream of the recycle cyclone suppresses nitrogen oxides with high efficiency because of the excellent mixing in the cyclone. The heat transfer coefficient on the tubes in the bed is increased at least 2 to 4 times because of the fine particulate in the bed. Fluidization occurs over a 10:1 range in superficial velocities. The present invention relates in general to fluid bed combustors and more particularly to a bubbling fluid bed with a high combustion efficiency, good sorbent utilization, non-heat extraction in the combustor freeboard above the bed and no secondary air introduction in the area above the bed to complete the oxidation reactions.

대표청구항 ▼

A method of burning solid particulate fuel and recovering useful energy therefrom, comprising the steps of: (a) maintaining a generally horizontal bed of inert particles, ash and some partially burned solid fuel particles on a distribution plate within an internal combustion chamber of a fluid bed combustor which also defines a freeboard immediately above the bed of particles; (b) directing a continuous stream of fluidizing gas upward within said combustion chamber from below said distribution plate so that the stream passes through the plate and said bed of particles for fluidizing the latter, the velocity of said stream of gas being such that the stream carries fine particles of a certain size and smaller upward with it into the freeboard from the fluidizing bed; (c) capturing substantially all of said fine particles carried upward by said stream of fluidizing gas within a particle recycle separator which forms part of the combustor and which is positioned above said freeboard, and returning most of the captured particles to the fluidizing bed while exhausting the gas from said separator, whereby the captured and returned fine particles define a recycling path of movement from the bed, through the freeboard and cyclone and back into the bed; (d) recovering heat energy from combustion taking place in said fluidizing bed but not from said recycling path of fine particles; and (e) operating the fluid bed combustor including its fluidizing bed and separator such that substantially all combustion of said fuel particles takes place only within said bed and not in either the freeboard or the separator and such that said recycling path of fine particles is maintained at a substantially constant temperature.

이 특허에 인용된 특허 (8) 인용/피인용 타임라인 분석

Yerushalmi ; Joseph ; Ehrlich ; Shelton ; Maaghoul ; deceased ; Mohamma d ; Lund ; Terry E., Apparatus and method for combusting carbonaceous fuels employing in tandem a fast bed boiler and a slow boiler.
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Priestley Robert Joseph (Westport CT), Dilute phase waste incinerator.
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Hoffert Franklin D. (Mountainside NJ) Milligan John D. (Little Silver NJ) Marina Jose M. (Miami FL) Fernandez Jose M. (Miami FL), Fluidized bed reactor apparatus and related gasification system.
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Kantesaria Prabhudas P. (Windsor CT) Matthews Francis T. (Poquonock CT), Hybrid fluidized bed combuster.
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Brogan Thomas R. (Charlestown MA), Method for reducing NOx emissions from combustion processes.
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Reh ; Lothar ; Hirsch ; Martin ; Plass ; Ludolf, Method of and apparatus for carrying out an exothermic process.
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Borio Richard W. (Somers CT) Goodstine Stephen L. (Windsor CT), Method of feeding particulate material to a fluidized bed.
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Strohmeyer ; Jr. Charles (Gladwyne PA), Unfired drying and sorting apparatus for preparation of solid fuel and other solid material.
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이 특허를 인용한 특허 (9) 인용/피인용 타임라인 분석

Bull, Douglas R.; Patten, Ross M.; Cairney, Paul; Cox, Gerald M.; Jepson, William P., Fluidized bed biogasifier and method for gasifying biosolids.
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Bull, Douglas R.; Patten, Ross M.; Cairney, Paul; Cox, Gerald M.; Jepson, William P., Fluidized bed biogasifier and method for gasifying biosolids.
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Adams Christopher,SEX ; Anderson Jim,SEX ; Andersson Mats,SEX ; Brannstrom Roine,SEX ; Weatherby John,GBX, Method and apparatus for burning fuel in the free board of a pressurized fluidized bed with solids recirculation.
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Crafton,Paul M.; Lewis, Jr.,James L.; Thome,William, Method and apparatus for combustion of residual carbon in fly ash.
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Crafton,Paul M.; Lewis, Jr.,James L.; Thome,William, Method and apparatus for combustion of residual carbon in fly ash.
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Paul M. Crafton ; James L. Lewis ; William L. Thome, Method and apparatus for combustion of residual carbon in fly ash.
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Hiltunen,Matti; Kinnunen,Pertti; Sarkki,Juha, Method of combusting oil shale in a circulating fluidized bed boiler.
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Abdulally Iqbal F. (Randolph NJ), Method of decreasing NOx emissions from a fluidized bed reactor.
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Oakes Eric J. (Del Mar CA) Lee Yam Y. (San Diego CA) Hiltunen Matti A. (Karhula FIX), Reducing N₂O emissions when burning nitrogen-containing fuels in fluidized bed reactors.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Fines recirculating fluid bed combustor method and apparatus 원문보기