ASME certification energy efficient Tubular type air preheater
Grade A boiler manufacturer
An air preheater (APH) is a general term to describe any device
designed to preheat the combustion air used in a fuel-burning
furnace for the purpose of increasing the thermal efficiency of the
In particular, this article describes the combustion air preheaters
for the large fuel-burning furnaces used to generate steam in
thermal power plants. The air preheater increases the steam
generator's thermal efficiency by preheating the combustion air
with heat recovered from the hot combustion flue gases .
1. A bundle of vertical tubes through which the flue gas flows
downward and exchanges heat with ambient air flowing horizontally
across the exterior of the tubes. Baffles are usually provided so
that the air flows across the tubes a number of times.
2. The same as (1) above except that the flue gas flows upward
rather than downward.
3. A bundle of horizontal tubes through which the air flows and
exchanges heat with the hot flue gas flowing downward across the
Medium:air,flue gas,exhaust gases, thermal oil, hot water,
refrigerants and etc.
Temperature:Standard heat exchanger to 560 °C,special
materials(nickel alloy) can reach to 1500°C.
Thermal power:standard air preheater/ air heater up to 10 megawatts
(MW), virtually unlimited by combining and special constructions
Materials:carbon steel, stainless steel,Nickel alloy or special
Air preheater are liquid and air heat exchanger or exhaust and air
heat exchangers. They are designed and carried out individually
depending on the application. Air preheater can be performed in
counterflow, co-current flow, co-current flow-countercurrent or
cross-countercurrent or cross-co-current flow. The design depends
on the media and the temperature conditions.
ASME 'S' & 'U' STAMP
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