Energy Efficiency Improvement Project at Coke Plant in Tata Steel Plant

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INDIACSR News Network

JAMSHEDPUR: Tata Steel organized Disseminating Seminar for India-Japan Model project for Coke Dry Quenching today at SNTI Auditorium in the presence of honorable chief guest, Mr Dalip Singh, Joint Secretary, Ministry of Steel, Government of India. The completion ceremony of the Energy Efficiency Improvement Project was held on November 28, 2011 at Tata Steel Jamshedpur plant.

The event marked the completion of the installation of a system for “The Model Project for Increasing the Efficient Use of Energy Using a Coke Dry Quenching (CDQ) System,” a joint project among the Ministry of Steel, the Ministry of Finance, Government of India, New Energy and Industrial Technology Development Organization of Japan (NEDO), Nippon Steel Engineering Co., Ltd. and Tata Steel.

In this project, which was carried out from 2006 to 2011, a CDQ system was installed at Tata Steel’s coke plant. The project demonstrated the effectiveness of dry quenching system as compared to conventional wet quenching system , including energy conservation effects, dust emission control, and better operations of a blast furnace using  better coke properties.

The dissemination of the CDQ system was promoted amongst other steel producers at seminar organized at SNTI, Jamshedpur, such as a promotion seminar.

Background and Objectives
In recent years, India’s demand for energy has been soaring due to rapid economic growth. This has resulted in India’s growing interest in energy conservation technologies that have been put into practical use in developed countries as measures to address energy and environmental issues.

The objective of this project was to reduce energy consumption at a steel plant by replacing a conventional wet (water) quenching method with a CDQ system that cools red hot coke through a dry quenching method (inert gas circulation). The CDQ system recovers waste heat to generate steam that is used for power generation or process steam during steel making processes, thereby saving energy. This project has also aimed to demonstrate the effectiveness of the CDQ system and promote the system throughout India and other countries.

Completion Ceremony Overview

Date: November 28, 2011 (Mon) 15:45-17:00 (local time)
Venue: Tata Steel Jamshedpur plant, Jharkhand, India

Attendees:
India side:
Ministry of Steel, Joint Secretary, Dr. Dalip Singh
Tata Steel, Managing Director, Mr. H.M. Nerurkar,
Vice President, Mr. Varun Jha,  Mr A M Mishra, Mr Raghunath Pandey , TWU

Japan side:
Mr. Fumio Ueda, Executive Director, NEDO
Mr. Mitsuo Kawaguchi, Consul-General, Consulate-General of Japan in Kolkata
Mr. Kentaro Endo, Director, Iron and Steel Technology Office, Ministry of Economy, Trade and Industry
Mr. Masaaki Sawa, Managing Director, Nippon Steel Engineering Co., Ltd.

Project Overview
A CDQ system was installed at Tata Steel’s Jamshedpur coke plant. Unlike conventional wet quenching methods that use water to cool red hot coke, the CDQ system uses inert gas circulation for cooling and recovers waste heat to generate steam that is recycled in steel making processes, while limiting emissions of air pollutants, including coal dust. The system consists of equipment used in transferring red hot coke to cooling chambers (bucket, crane and charging device), cooling chamber, equipment used to discharge cooled coke from the chamber, gas circulation fan, primary and secondary dust catchers for removing dust from inert gas circulation, and a waste heat recovery boiler used in generating steam from recovered waste heat.

This system recovers 84% of the waste heat generated from coke and is expected to reduce annual energy consumption by the equivalent of about 50,000 tons of oil as well as abate annual CO2 emissions by about 137,000 tons.

System specifications:
Maximum coke disposal rate: 135 ton/hour
Energy conservation (steam recovery) effect: oil equivalent of 50,000 tons/year
Environmental improvement (GHG emissions reduction): CO2 equivalent of 137,000 tons of CO2/year
Entrusted company for Engineering: Nippon Steel Engineering Co., Ltd.
Project Execution – Tata Steel and  Larsen & Toubro

Dissemination Activities

With the aim of disseminating the system throughout India and other countries, dissemination activities are being organized, such as a promotion seminar.

 

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