Air Heater

DORIGHT offers six series of air preheaters: 650º C, 750º C, 800º C, 850º C, 900º C and 950º C. We also supply air preheater according to customer's special requirement within the above range.
FIRST Tube floating type air preheater
The air pre-heater DORIGHT researches and designs adopt the structure of tube floating. Up to now, most of them have national patents. ( The patent number respectively is: 1277302, 12409019, 1200624 etc. ) the benefits as follows:

All the main components of air pre-heater with tube floating type adopt the heat-resisting alloy steel which fit the America standard A387 series, they have good heat-resisting and corrosion-resisting ability.
The match between tube and tube sheet adopts patented technical design. The freely expanding tubes can make tubes work in no stress condition, avoiding the twisted deformation due to tubes expand not evenly, cracking of welds and even a whole unit discards.
It's cost is lower than air preheater used the single tube compensation type, and it is also easier to maintenance, simply to transport, easier to transport and has longer service life, little volume.
This type air preheater is widely used in the energy-recycling of steel, furnace, power plant and other process.
Second Single tube compensation type air preheater

Adopt single tube compensation, solve the uneven expansion between tubes and compensation of expansion under high temperature.
Compatible to temperature under 850º C, frequent operation and many kinds od reactant production line.
Have a wider operation range of process.
Better air tightness.