98/02462 Operation results of IHI flue gas desulfurization system for unit no. 1 (700 MW) of Relhoku Power Station of Kyushu Electric Power Co., Inc.

Unit 1 at Hitachinaka Power Station, which is the newest 1,000MW coal fired power station of Tokyo Electric Power Co., Inc., entered into the commercial operation in December 2003. IHI (Ishikawajima-Harima Heavy Industries Co., Ltd.) constructed the flue gas treatment system with the state-of-the-art technology and low emission values. To meet demands for both reducing construction cost and high performance, IHI applied a single rectangular Absorber based on the simultaneous desulfurization and oxidation method, Nonleakage type Gas-Gas Heater (GGH) and Electrostatic Precipitator (ESP) at low-low temperature position. Unit 1 at Mizue Power Station of GENEX Co., Ltd., which is one of the independent power produces, entered into the commercial operation in June 2003. In this plant, IHI applied a high performance spray tower Absorber and wet type Electrostatic Precipitator (ESP) to meet the high desulfurization efficiency for vacuum residue oil firing and extremely rigorous regulation owing to location near the metropolitan area.

Download Full-text

Evaluation of Synthetic Gypsum Recovered via Wet Flue-Gas Desulfurization from Electric Power Plants for Use in Foundries

Archives of Foundry Engineering ◽

10.2478/v10266-012-0072-3 ◽

2012 ◽

Vol 12 (3) ◽

pp. 5-8

Author(s):

R. Biernacki ◽

R. Haratym ◽

J. Kwapisz

Keyword(s):

Energy Consumption ◽

Production Process ◽

Electric Power ◽

Flue Gas ◽

Power Plants ◽

Flue Gas Desulfurization ◽

Practical Applications ◽

Electric Power Plants ◽

Depth Analysis ◽

Waste Gypsum

Abstract This article investigates possible use of waste gypsum (synthetic), recovered via flue-gas desulfurization from coal-fired electric power plants, in foundries. Energy sector, which in Eastern Europe is mostly composed from coal-fired electric power plants, is one of the largest producers of sulfur dioxide (SO2). In order to protect the environment and reduce the amount of pollution flue-gas desulfurization (FGD) is used to remove SO2 from exhaust flue gases of fossil-fuel power plants. As a result of this process gypsum waste is produced that can be used in practical applications. Strength and permeability tests have been made and also in-depth analysis of energy consumption of production process to investigate ways of preparing the synthetic gypsum for casting moulds application. This paper also assesses the chemical composition, strength and permeability of moulds made with synthetic gypsum, in comparison with moulds made with traditional GoldStar XL gypsum and with ceramic molds. Moreover examination of structure of synthetic gypsum, the investigations on derivatograph and calculations of energy consumption during production process of synthetic gypsum in wet flue-gas desulfurization were made. After analysis of gathered data it’s possible to conclude that synthetic gypsum can be used as a material for casting mould. There is no significant decrease in key properties, and on the other hand there is many additional benefits including low energy consumption, decreased cost, and decreased environmental impact.

Download Full-text