ONESTONE CONSULTING S.L.

Impact of clinker coolers on downstream equipment

1 Scheme of a grate cooler OneStone Consulting
2 Cooler efficiency as a function of bed height OneStone Consulting
3 Static cooler grate IKN
4 Erection of a ­Pendulum cooler IKN
5 Cross-bar cooler with roller crusher FLSmidth
6 ETA cooler with roller crusher Claudius Peters
7 Intermediate roller crusher ThyssenKrupp Industrial Solutions
8 Coating conditions and reduction measure A TEC
9 Air cannons at a preheater Martin Engineering
10 Ring formations within a kiln Brokk
11 Clinker fluctuations OneStone Consulting
12 Dimensioning of clinker conveyors [4] OneStone Consulting
13 Clinker pan conveyor Aumund
14 Clinker storage discharge Aumund
15 Downstream clinker temperatures OneStone Consulting
16 Temperature mixing effect OneStone Consulting
17 Downstream clinker conveyors Beumer
18 Clinker cooler bag filter Scheuch
Hot clinker on a pan conveyor behind the cooler Aumund

Clinker coolers in today’s cement pyroprocessing lines are considered to be very reliable even under kiln upset conditions. But what is the interaction of the cooler with the upstream pyroprocessing under extreme conditions and how is the downstream equipment affected? In the following article the process will be analyzed and questions answered.

1 Introduction

Modern clinker coolers require 1.7 to 2.0 Nm³/kgcli. of fresh air to cool clinker with temperatures of more than 1400 °C from the rotary kiln to outlet temperatures below 100 °C. Such clinker coolers recuperate most of the thermal energy in the clinker to provide secondary air for the burning process and tertiary air for pre-calcination achieving thermal efficiencies of about 75 % and more. Clinker coolers are also required to buffer kiln fluctuations and have no or only a minor effect on the upstream pyroprocessing system which comprises pre-heater, pre-calciner, kiln and fuel...

TEXT Dr. Joachim Harder, OneStone Consulting S.L., Barcelona/Spain

This article appeared in

ZKG 7-8/2015

This article appeared in

ZKG 7-8/2015

Ressort:  Markets and Trends
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