Japan, India Joint Project on CDQ System Proves Energy Conservation

Copyright New Energy and Industrial Technology Development Organization

The New Energy and Industrial Technology Development Organization (NEDO) and Japanese steel company Nippon Steel Engineering Co. announced on November 29, 2011, that they held a ceremony marking the completion of the facilities of their joint project called "Model Project for Increasing the Efficient Use of Energy Using a Coke Dry Quenching (CDQ) System." The project has been carried out from FY2006 through FY2011 along with the Indian Ministries of Steel and Finance, and Tata Steel, an Indian steel company.

In this project, a CDQ system was installed at Tata Steel's Jamshedpur coke plant. The system cools red hot cokes by inert gas circulation unlike a conventional wet quenching system using water, utilizes recovered heat to generate steam for captive use, and at the same time limits emissions of air pollutants such as coal dust. The collaborative team verified the effectiveness of the new system in terms of energy savings, dust control, and stable blast furnace operations by using homogenized cokes.

The maximum coke disposal rate of the CDQ system is 135 tons per hour. As the system recovers 84 percent of waste heat, energy-saving is reckoned to be equivalent to about 50,000 tons of heavy oil per year, or a reduction of about 137,000 tons of carbon dioxide (CO2) emissions per year. NEDO will promote the spread of the technology throughout India and other nations by providing promotion seminars.

Posted: 2012/03/21 06:00:15 AM