Abstract:
A method of combustion and an apparatus therefor in which separate streams of very lean and very rich fuel/oxidant mixture are combusted separately, the products of combustion therefrom being thoroughly mixed before final combustion takes place. The lean/rich primary combustion minimises combustion temperatures and pollutant formation, whilst the final combustion is substantially stoichiometric.
Abstract:
An improvement of a combustion furnace for a boiler in which it is possible to improve and uniformize the heat collection ratio of the furnace of the boiler. Moreover, this invention easily controls the temperature of superheated steam while the heating surface area is kept constant without altering the boiler construction and heat balance, and provides a zone temperature control to a boiler. The boiler according to the present invention is provided with a radiant heat transfer portion (15) in which at least one or more heat accumulating type burner systems are disposed in which a pair of burners (2, 3) for suppyling air for combustion and exhausting combustion gas through a heat accumulator (5) are caused to burn in an alternate fashion while combustion gas is discharged through the heat accumulator (5) from one of the burners which is not burning, so that excess heat energy that has not been consumed in the radiation heat transfer portion (15) is recovered when it is exhausted via the heat accumulator (5) of the other burners. In addition, in the boiler of the present invention, a plurality of heat accumulating type burner systems (1) are disposed in a direction in which water for the boiler flows, and the pair of heat accumulating type burners (2, 3) of the respective burner systems (1) are disposed in a direction that intersects the direction in which water for the boiler flows, whereby a temperature zone is formed by controlling combustion for each heat accumulating type burner system (1), thereby making it possible to control the distribution of the furnace heat collection ratio. Furthermore, the boiler of the present invention has the radiation heat transfer portion (15) in which at least one heat accumulating type burner system is provided, and is provided with a superheater (17) in which saturated steam is superheated by extracting a part of combustion gas from the radiation heat transfer portion (15), the combustion gas being exhausted directly out of the combustion chamber without passing through the burners (2, 3).
Abstract:
탄소질연료 화력발전소로부터 배출되는 산가스를 저감시키는 방법. 수산화칼륨 수용액 건식세정법은 발전소 연도가스로부터의 산화질소, 산화황, 염화수소 및 불화수소의 형성을 저감하는 데에 사용된다. 연도가스로부터 분진물질을 제거하기 위해서 전기집진기를 이용하는 이들 발전소는, 상기 성분의 상류에 수산화칼륨을 분사시킴으로써 상기 성분의 성능을 향상시킨다. 이점에 부가하여, 최종생성물은 매립처리되는 것보다 비료로서 상업적으로 이용될 수 있는 이점이 있다.
Abstract:
3단계 산화 및 제2단계 인시추 노 연도가스 재순환을 사용하여 탄소연료의 연소로부터 NO X 의 방출을 저감시키기 위한 장치이다. 제1단계는, 부분 산소연소기가 가열 연소공기의 존재하의 연료를 부분적으로 연소하는데 사용된다. 부분 산화처리에서 생성된 연도가스는 용융 슬래그가 제거 처리되는 동안 제2단계 부분 산화연소기를 지나간다. 2차 가열 연소공기는 제2단계 연소기 내로 도입되어 환원연도가스를 생성하고, 소망의 인시추 노 연도가스 재순환을 야기하는 방식으로 노에 분사된다. 3차 연소공기는 연소의 제3단계에서 연도가스와 함께 혼합되어 연소처리를 실제적으로 종료한다. 예열증기가 연소의 제1단계 또는 제2단계에 가해질 수도 있다.
Abstract:
A burner for a rotary kiln comprising - an elongated tubular body (6) having a longitudinal axis (L) and a discharge end (7) adjacent a combustion zone comprising a flame, - at least one fuel supply pipe for transporting and ejecting fuel through a fuel pipe outlet (10) at the discharge end (7), the fuel being alternative fuel or a mixture of alternative fuel and fossil fuel, and - at the discharge end (7), a number of high speed primary air jet outlets for ejecting primary air and being arranged, when seen towards the discharge end, along a closed line, such as a circle, outwardly of the fuel outlet (10) and surrounding the fuel outlet, wherein at least one of the primary air outlets and preferably a number of the primary air outlets comprise a single orifice outlet or a multiple orifice outlet forming a flat jet air outlet (11) having a major axis and a minor axis and being configured to eject a flat jet air stream (13) having a flat fan pattern with a predetermined fan angle v.
Abstract:
An arrangement and method in a boiler using fluidized-bed technology. The arrangement comprises a first space (1) of a furnace that comprises means for forming a fluidized bed (21), a second space of the furnace that does not comprise means for forming a fluidized bed, means for feeding fuel into the first space (1) of the furnace, a partition wall (3) that is at least mainly vertical and arranged between said spaces (1, 2) of the furnace to separate them from each other, the arrangement further comprising a roof structure (5) arranged above the first space of the furnace to separate the first space (1) of the furnace from parts of the second space (2) above it, the first space (1) of the furnace being connected to the second space (2) through a flow path (18), which flow path (18) is arranged on the side of the first space (1) of the furnace to lead gases (G) rising from the fluidized bed to the second space (2) of the furnace.
Abstract:
Combustion of coal in which oxygen is injected into the coal as it emerges from a burner (9) to produce ash having reduced amounts of carbon.
Abstract:
Combustion of coal in which oxygen is injected into the coal as it emerges from a burner (9) to produce ash having reduced amounts of carbon.
Abstract:
A method for reducing acid gas emissions from a carbonaceous fuel burning power plant. An aqueous potassium hydroxide dry scrubber method is used to reduce the formation of nitrogen oxides, sulfur oxides, hydrogen chlorides and hydrogen fluoride from plant flue gases. For those plants utilizing an electrostatic precipitator to remove particulate matter from the flue gas, the performance of this component is also enhanced by the injection of potassium hydroxide upstream of the component. As an added advantage, the final product has beneficial commercial utility as a fertilizer product, rather than having to be disposed in a landfill.