Metso pebble lime cooler0 pages

Technical specification

Metso pebble lime cooler
operation
The Metso Pebble Lime Cooler, based
largely on a previous L. H. Niems design, is a proven, efficient piece of heat
transfer equipment. Its primary purpose, along with that of its associated
discharge feeders, is to cool the material discharging from the rotary kiln to a
temperature that can be tolerated by the
product take-away belt conveyor, all the
while maintaining the material discharge
rate required for the desired rate of lime
production. To accomplish this several
PLC-based, “closed loop” (or automatic)
controls are employed.

In order to maintain an even and continuous
transfer of heat within the cooler, two basic conditions must exist: a fairly constant packed bed
of material in the cooler and a fairly constant
flow of cooling air throughout the bed.
To maintain an optimum bed of material within
the cooler an automatic level control is used.
A microwave (or “radar”) type of level sensing
device is installed near the top of the cooler to
sense the relative height of the material bed.
(See Figure 1, below.) The height of the bed is
typically set to be controlled within a high-low
range of about 6 inches.

Rotary Kiln

Level Sensor

© Metso Corporation, TS Metso pebble lime cooler 15-01-en

Firing Hood
Cooler is directly below,
beneath concrete floor,
out of view.

Figure 1. Typical cooler level sensor installation
For more information, contact your local Metso representative. www.metso.com
Metso Minerals Industries Inc.
350 Railroad Street, Danville, PA 17821-2046, USA, Phone: +1 570 275 3050,
Fax: +1 570 275 6789Specifications in this document are subject to change without notice.
Product names in this publication are all trademarks of Metso Corporation.