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The authors proposed a correlation equation between the particle segregation coefficient V in a fluidized bed with a paralleltube distributor and the dimensio-nless concentration distribution C along the bed height. Through the cold model experiments, the factors influencing the segregation process in a fluidized bed with a parallel - tube distributor were discussed. On the basis of cold model experiments, the authors added an ash burn-out bed with a porallel - tube distributor to a 35T/H Fluidized Bed Boiler,... The authors proposed a correlation equation between the particle segregation coefficient V in a fluidized bed with a paralleltube distributor and the dimensio-nless concentration distribution C along the bed height. Through the cold model experiments, the factors influencing the segregation process in a fluidized bed with a parallel - tube distributor were discussed. On the basis of cold model experiments, the authors added an ash burn-out bed with a porallel - tube distributor to a 35T/H Fluidized Bed Boiler, with the ash burn-out, the total thermal efficiency of the boiler is around 80% ( 7-8% higher than before ) , and the withdrawal ash temperature is 200℃ lower than before. 本文提出了风管布风床层中沸腾区的颗粒分层参数V与沿床层高度无因次浓度分布c的相关式;通过试验讨论了对风管布风床的颗粒分层的影响因素。在冷态试验基础上,对萍乡一台35T/H流化床锅炉进行改装,增设灰渣燃烬冷却床,使该炉在燃用热值为1600～1700kcal/kg的洗矸时,锅炉热效率可达80％,较之改装前提高7～8％,同时排渣温度可下降约200℃。 In this paper some problems existing in designing and operating large fluidizeal-beds are discussed. Several approaches to the problems are suggested to be adopted to improve the design, e.g.,use of fuel spreading air,use of secondary air to intensify the combustion in the freeboard, rational design of the location of spillway, and so on. The combustion fraction in the fluidization zone is also discussed. 本文讨论了大型流化床锅炉在设计和运行中出现的一些问题。提出了改善措施,如采用播煤风、采用二次风强化悬浮段燃烧,合理选用烧燃分额,并给出了设计和运行的参数值。另外指出了大型流化床锅炉溢流口设置应注意的一些问题。 Considerations of the design and operation of large size FBD boiler are discussed in the paper. The use of coal distributing air, secondary air supported combustion in free board and some other methods are proposed as the improvement measures together with their design and operating data. The effect of in-bed tube structure on bed fluidization as well as that of the fluid-bed combustion on heating surface arrangement is also discussed in the paper. 本文讨论了大型流化床锅炉在设计和运行中出现的一些问题。提出了改善措施,如采用播煤风,采用二次风强化悬浮段燃烧。并给出了设计和运行的参数值。论述了埋管结构对流化质量的影响,以及沸腾层燃烧份额对受热面布置的影响。
流化床锅炉
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fluidized bed boiler
Heat transfer in a large-scale circulating fluidized bed boiler
The imaginary plane mothod of radiation heat transfer in the freeboard of atmospheric bubbling fluidized bed boiler
Combustion model for staged circulating fluidized bed boiler
A mathematical model for differential-velocity circulating fluidized bed boiler
Experimental study on an on-line measurement of high temperature circulating ash flux in a circulating fluidized bed boiler
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Data on circulating fluidized bed boilers that have been commissioned in the different countries in the last few years are presented.
A thermal engineering analysis of a new method of load control in low-power fluidized bed boilers is cariied out.
Use of DTA in the investigations of fly ashes from fluidized bed boilers
Advanced technologies such as fluidized bed boilers offer the potential for direct combustion of coal with simultaneous pollutant removal.
BERC solicited budgetary quotations from vendors of fluidized bed boilers and conventional grate and stoker boilers.
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Optimal startup conditions of fluidized-bed boiler
The process is mechanically very similar to a conventional fluidized-bed boiler, although with two reactors instead of one.
fluid bed boiler
At that time, EPI conducted a demonstration test utilizing 110 tons of rice hull-based poultry litter fired into an existing fluid bed boiler.
From the bottom of the bin is the fuel taken to a pneumatic system and is blown directly into the bottom of the fluid bed boiler.
This ash fraction is blown in with primary air into the bottom of the fluid bed boiler through a separate inlet.
The bubbling fluid bed boiler is proven technology throughout the world and has demonstrated its ability to fire low heating value fuels.
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