Application of CFB technology for large power generating units and CO2 capture

Abstract

Data on the development of the circulating fluidized bed (CFB) technology for combustion of fuels in large power generating units are examined. The problems with raising the steam parameters and unit power of boilers with a circulating fluidized bed are examined. With the boiler system at the 460 MW unit at Lagisza (Poland) as an example, the feasibility of raising the efficiency of units with CFB boilers through deep recovery of the heat of the effluent gases and reducing expenditure for in-house needs is demonstrated. Comparative estimates of the capital and operating costs of 225 and 330 MW units are used to determine the conditions for optimum use of CFB boilers in the engineering renovation of thermal power plants in Russia. New areas for the application of CFB technology in CO 2 capture are analyzed in connection with the problem of reducing greenhouse gas emissions.

The Study of Dynamic Processes in the Boiler Furnace with Circulating Fluidized Bed

“…Euler -Euler Method allows to trace gas-dynamic process in the furnaces of CFB boilers, but does not allow to consider the movement of individual particles of the fuel [7,8]. Lagrange-Euler approach allows to investigate a large number of individual dispersed particles, but not quite correctly reflected the processes in the lower furnace with circulating fluidized bed [9,10]. The computational grid consists of 137673 of cells that contains 27749 knots and has 272690 separate surfaces.…”

Research of integral parameters for furnaces of a circulating fluidized bed

“…This block provides the world's best performance for units with a CFB boiler -43.3%, which, coupled with very low emissions meet the requirements of the EU directive on large combustion fuels [2].…”

Numerical research of heat transfer in gas heat exchanger

“…The main changes in the parameters may be temperature variations and fluid flow rate. The literature presents a broad description of analytical methods for solving problems of heat and mass transfer in a variety of heat exchangers [1][2][3]. To solve the problems, and presenting the results in the entire volume of investigation the most effective use of numerical simulation techniques [4,5].…”