Flue gas cooler high efficiency heat recovery desulfuration
Working principle of a flue-gases cooler is the same as in the
above-described equipment, but the aim in this case is to cool a
primary fluid, not to get a thermal profit by heating a secondary
These equipment are usually installed as the previous step to a
flue-gases cleaning, to avoid the gases from reaching the cleaning
systems at too high temperatures. This means an alternative to the
dilution with air, which would imply an over-sizing of the
Before designing this kind of equipment, it is necessary to know
the nature of the gases to be cooled and their dust content. The
purpose of all that is to design an equipment free of important
fouling which would force to make cleaning works more frequently
We must have in mind as well the availability to detach the dust
from the gaseous stream containing it in all those areas where
there is a bend or some enlarging in the pass section, which forces
to include in the design some systems for dust collection and
removal, to allow the correct heat exchange.
To sum up, the following items have to be taken into account when
designing a flue-gases cooler:
Kind of fluid.
Maintenance and cleaning works.
Connection of the equipment with the rest of the plant.
Depending on the above mentioned factors, different technical
solutions may be applied which will go through the adoption of an
Modular (with only one or many fans).
One or more steps.
Flue gas condensation may cause the heat recovered to exceed the
Lower Heating Value of the input fuel, and thus an efficiency
greater than 100%. Since historically most combustion processes
have not condensed the fuel, usual efficiency calculations assume
the combustion products are not condensed. This assumption is
implicit when basing calculations on the Lower Heating Value. A
more rigorous approach would be to base efficiency calculations on
the Higher Heating Value, which typically results in efficiencies
less than 100%.
Should the flue gases be cooled below 25 °C (77 °F), even
efficiencies based on the Higher Heating Value may exceed 100%,
since typical heating value definitions assume that all heat is
released when combustion products are cooled to somewhere between
15.56 °C (60.01 °F) and 25 °C (77 °F).
Established in 1985,Zhangjiagang Hua Dong Boiler Co.,Ltd.(trading
as HD Boiler),produces power plant; industrial; waste heat; waste
incineration; biomass; organic heat carrier and electric steam
boilers. Coupled with a comprehensive range of heating surfaces, HD
Boiler brings to the market a unique service including boiler
design , fabrication, installation, maintenance and replacement of
boiler pressure parts.
1. Fabrication area of 200,000 square meters
2. 150 Engineers
3. 600 Coded welders
4. 60 Licensed Inspectors(NDT Level-III instructors)
5. Class-A Licenses for Design and Manufacture Boiler
6. ISO 9001:2008 Quality System
7. ASME Certificate of Power Boilers
8. ASME 'S','U' and NB stamp authorization