Source:JASE-W Japanese Smart Energy Products & Technologies http://www.jase-w.eccj.or.jp/technologies/index.html

KeywordsS-01

Waste gas heat of a sintering plant is recovered as steam or electric energy.

The heat recovery efficiency is 60% for waste gas from cooler and 34% for waste gas from sintering machine proper.

Waste gas heat recovery from sintering machine proper also leads to the reduction of coke consumption.

Applicable whether the cooler is of a circular type or linear type.

CO2 emissions can be reduced, leading to a possibility of employing this system in a CDM project.

Features

Using this system, high-temperature waste heat of waste gas from a cooler and a sintering machine proper is recovered as steam, which can also be used for electric power generation.

The system is composed of a waste heat recovery boiler,economizer, dimineralized water supply equipment, de-aerator,steam drum, etc.

For realizing high-efficiency recovery, a high-temperature exhaust section is separated from a low-temperature exhaust section and heat is recovered only from high-temperature exhaust section.

In waste heat recovery from a cooler, the exhaust gas the temperature of which is lowered by heat exchange is sent back to the cooler and used again for sintered ore cooling.

There are two types in waste heat recovery from a sintering machine proper: one is a type where exhaust gas is directly sent to a gas treatment system after heat exchange (non-circulating type) and the other is a type where it is reintroduced into the sintering machine proper (circulating type).

Basic Concept or Summary

Waste Heat Recovery System

Y3 equipment or facility Z4 electricity E25 general-purpose machinery

JP Steel Plantech Co.

Sintering machine proper

Cooler

Waste heat recovery boiler Waste heat

recovery boilerFan Fan

Effects or Remarks

Installation in Practice or Schedule

Contact: JP Steel Plantech Co., Green Business Team, Planning Department, Overseas Sales & Marketing DivisionGeneral Coordinator: Norihiko Inoue, Tel: +81-(0)45-440-5908 Fax: +81-(0)45-440-5841General Manager: Masao Miki, Tel: +81-(0)45-440-5908 Fax: +81-(0)45-440-5841URL: http://www.steelplantech.co.jp

Domestic

Overseas

Steam condition: 20 ata. saturated steam

No. Waste heat recovery system

Steam recovery volume (kg/t-sinter)

Power recovery volume (converted value) (kWh/t-sinter)

1 No system0

2Cooler recovery system (circulating type)

120

3Cooler recovery system (circulating type) and sintering machine recovery system (circulating type)

170

The above values represent typical cases; in reality, they depend on operating conditions and equipment conditions.

No. Waste heat recovery system

Dust dispersion volume (kg/t-sinter)

1No system

2 Cooler recovery system

3Cooler recovery system and sintering machine recovery system (circulating type)

25

2026

2630

Recovered power

Consumed power

Sintering machine properCooler

0.92

0.29

0.19

Others

P-S-01

� 1 unit in 2014 in India (20,600 kW)