Comparison of designs and economic efficiencies of air circulation systems in dryers (Part 1)

In remembrance of Dr.-Ing. Karsten Junge

In a convection dryer, such best-achievable economic indicators as heat and power consumption and the requisite installation space depend on the quality of the air circulation system. In German speaking areas, the two most frequently encountered types of air circulation systems for conventional dryers are rotary fans and airwalls. At the same time, more and more rapid drying processes are becoming established. The present contribution compares and analyses the measured economic operating data of the various air circulation systems. This first part deals primarily with data pertinent to masonry bricks and clinkers, while Part 2 (coming up in Zi6/2011) will present corresponding data for roof tiles. In nearly all regards, rapid dryers emerge as the most economical variant, often by a wide margin.

1 Introduction

All kinds of bricks and tiles (clay masonry units) are still being dried by means of air circulation in convection dryers. Thus, the air circulation system constitutes the dryer‘s core component, much like the engine of an automobile. That being so, the best-achievable economic indicators – in terms of heat and power consumption or requisite installation space [1, 8, 9, 11, 13, 14] – that a given dryer can achieve depend on how effective the air is being circulated.

All over the world, bricks of all shapes and sizes are being made of widely disparate clay raw materials [10, 29]....

Related articles:

Issue 2009-12

Always dries better: fast – efficient – reliable

Rotho Robert Thomas Metall- und Elektrowerke GmbH & Co. KG Always dries better: fast – efficient – reliable This richly traditioned, family-owned enterprise based in Neunkirchen presented two...

more
Issue 2012-05

Equipceramic launches new Barna 2.0 rapid dryer onto the market

The Spanish company Equipceramic has launched a new rapid dryer for high drying rates onto the market. This new dryer evolved from the conventional rapid dryer boasts improved efficiency and...

more
Issue 2017-2

Barna – new rapid dryer for high production rate

Equipceramic has developed a new rapid dryer for high production rates. It is an evolution from the current rapid dryer using dryer cars as drying supports. All the advantages of the traditional rapid...

more
Issue 2016-8

Hybrid dryer

TCKI has developed a new drying process for chamber dryers (hybrid dryers) that can reduce the specific annual energy consumption for drying from approx. 4?000 to roughly 3?000?kJ/?kg water. It...

more
Issue 2009-10

Tecton introduces state-of-art technologies at new Leier brick works in Petrovany, Slovakia

Leier International opened their new backing brick factory in Petrovany, Slovakia, on September 11. The family-run concern owns and operates a number of production plants for precast concrete...

more