IHI ENGINEERING REVIEW
2012 Vol.45 No.1
Energy demand is burgeoning mainly as a result of economic growth in developing countries and other parts of the world. Reducing carbon emission from coal-fired power plants is crucial for preventing global warming while stably supplying power. Toward this end, this article features an initiative aimed at achieving CO2 sequestration and capture technology based on a chemical absorption method.
Coal-fired power plants emit large amounts of CO2, which constitutes one of the largest causes of global warming. Successful reduction of environmental pollutants to zero would not only enable effective use of coal with abundant recoverable reserves, but also help solve environmental issues.
The Twin IHI Gasifier (TIGAR®) is a circulating fluidized bed-type gasifier that can be operated under milder conditions than other gasifiers. Based on proven fluidized bed and plant technologies, IHI can provide an economically attractive gasification process.
3. Technical Papers
SUDA Toshiyuki, LIU Zhihong, TAKAFUJI Makoto, HAMADA Koki, TANI Hidehisa
The importance of coal gasification technology is increasing around the world due to the rising cost of oil and natural gas. Lignite coal is suitable for gasification because of its high reactivity, and since there are huge reserves of this coal available, simple and cheap gasifier is needed. IHI has developed the TIGAR® (Twin IHI Gasifier) process for lignite coal, based on our commercialized circulating fluidized bed technology. TIGAR® is a circulating fluidized bed gasifier with twin reactors (a riser combustor and a bubbling bed gasifier), and can produce high calorific syngas at low temperatures (800 - 900°C) and atmospheric pressures. In the development of TIGAR®, predicting the Residence Time Distribution (RTD) of coal particles inside the gasifier was important because it affects the performance (cold gas efficiency) of the gasifier. This paper demonstrates the numerical model for the prediction of the RTD of coal particles inside the gasifier.
MORIOKA Noriko, KAKIUCHI Daiki, OZAWA Kanji, SEKI Naoki, OYORI hitoshi
The More Electric Engine (MEE) is a next generation turbofan engine that will lead engine control for MEA (More Electric Aircraft) in the 21st century. Recently, IHI has started investigations and studies in order to meet the challenge of creating "an ECO-friendly engine for the future." This paper overviews the IHI MEE and reveals details of IHI's "Green Innovations."
TODA Katsuya, NAKAMURA Yoshihiko, KURATA Takao
The most popular method for inspecting concrete structures for deterioration (for example, due to chloride attack) is sampling. But sampling inspections are destructive and only point out which structures need repairs. On the other hand, spectroscopic analysis can display chloride ion distributions with contour lines. It is better to diagnose concrete structures with spectroscopic analysis, rather than by using point-by-point sampling. This paper presents the results of diagnosis of structures in service affected by chloride ions from the sea and snowmelting agents.