fluidized bed boiler Articles
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10 ton CFB Power Plant Boiler
This type of boilers is very popular in recent years. Energy saving circulating fluidized bed power plant boiler mainly used for large central heating, thermal power plants to generate electricity or other purposes Type: ZG Capacity/Hot Power:35 ~ 670t/h ZG Pressure: 1.25 ~ 13.7 MPa ZG Temperature: 450 ~ 560 ? Energy-saving circulating fluidized bed power plant ...
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Two-stage fuel oxidation and comparison of water catalytic boilers with fluidised bed and fixed layer
The new method of decreasing NOx emissions in catalytic boilers consisting of two-stage (two-chamber) fuel oxidation is presented in the following paper. The corresponding plant and parameters in it are described. The second part of article contains the comparison of technical and economic characteristics of Russian and foreign hot water catalytic boilers with fluidised bed and fixed ...
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Catalytic boilers with catalytic fluidised bed
In this paper, conditions of work, special features and problems of boilers with catalytic fluidised bed are described. The specific conditions, when the catalyst layer remains stationary and granular or becomes spouting, are also considered. There are some main zones in the catalytic boilers with fluidised bed, which characterise such boilers and which must exist in them under normal working ...
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Some theoretical fundamentals of catalytic fuel combustion
In the following paper, the special features of catalytic combustion, which are distinct from the developed theory of flame combustion are considered. They are connected with the properties and characteristics of catalysts, the developed surface for reaction and the comparatively low catalysts' temperatures. They determine the rate of catalytic reaction and the corresponding three main regions of ...
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Chemical sequential extraction of heavy metals and sulphur in bottom ash and in fly ash from a pulp and paper mill complex
A five-stage sequential extraction procedure was used to determine the distribution of 11 metals (Cd, Cr, Cu, Mo, Pb, Zn, As, Co, V, Ni, Ba), and sulphur (S) in bottom ash and in fly ash from a fluidized bed co-combustion (i.e. wood and peat) boiler of Stora Enso Oyj Oulu Mill at Oulu, Northern Finland, into the following fractions: (1) water-soluble fraction (H2O); (2) exchangeable fraction ...
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Problems of catalytic boiler safety and their role in designing and operation of gas-fired boiler
In the following paper, some problems of safety for catalytic boilers with fixed and fluidised beds are discussed. The reason is to protect the boiler from gas and fuel-air mixture explosion. For it the conditions excluding the transition from catalytic combustion to flame must be observed, and they are presented in the article for different combustible gases. A special attention has been paid to ...
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Low-emission coal burning technology
Customer: Foster Wheeler Energy, Siemens, EnergoProjekt Katowice Challenge: One third of carbon dioxide emissions caused by humans come from the burning of fossil fuels in energy production. How to reduce them? Solution: Developing a circulating fluidised bed (CFB) boiler where fossil fuels are combusted with pure oxygen separated from the air. Key benefits: 15-20 per cent lower carbon dioxide ...
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Design of boilers with catalytic fluidised bed and their connection to heat supply system
The new advantage of catalytic boiler consisting of the location of heat source near the consumer is described. It imposes some restrictions on the design of such a boiler, which is based on the zonal arrangement approach. The details of such design of boilers with catalytic fluidised bed intended for different purposes (water heating, steam generation, steam superheating) are considered and, in ...
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Heavy metals in wet scrubber residue from a medium–sized (32 MW) municipal district heating plant incinerating wood and peat in a fluidised bed boiler
Due to the low total concentrations of heavy metals and extractable compounds, it is recommended that the wet scrubber residue be used as a construction agent instead of being disposed of in landfills. According to five–stage sequential extraction, the highest concentrations of most of the heavy metals occurred in the residual fraction (i.e., HF + HNO3 + HCl), which means that the heavy metals in ...
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Techno-economic evaluation of revamping of coal-fired power plants in India
A techno-economic feasibility study has been conducted to investigate the revamping of two 32 MWe Pulverised-Coal (PC) boilers with a number of firing options. The options investigated were: (1) conventional PC revamping, (2) replacement with a new PC boiler, (3) PC to Circulating Fluidised Bed (CFB) revamping, (4) replacement with a new CFB boiler, and (5) Bubbling Fluidised Bed (BFB) revamping. ...
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