Utility / Power Station Recuperative Boiler Air Preheater Heat
Preservation High Efficiency
Description
High efficiency and energy saving boiler part air preheater is a
general term used to describe any device designed to heat air
before another process (for example, combustion in a boiler) with
the primary objective of increasing the thermal efficiency of the
process. They may be used alone or to replace a recuperative heat
system or to replace a steam coil.
Air pre-heater is a kind of equipment used to improve the heat
exchange performance of the boiler and reduce energy
consumption.Air preheater can be divided into three types: plate
type, rotary type and pipe type.The working principle of air
preheater is introduced with rotary type as an example.A large
amount of unburned combustible material will be deposited on the
heat transfer element and possibly air preheater will catch
fire.The analysis of brake loss and air leakage treatment are also
introduced in detail.
Parameter
| Layout | Horizontal layout | Vertical Lout |
| Tube arrangement | Staggered arrangement In-line arrangement | Staggered arrangement In-line arrangement |
| Sealing of pipe and plate | Packing heat-resistan material / welding | Welding |
Advantage
1. Improve and intensify combustion
After passing through the waste heat device, the air enters the
furnace, which accelerates the drying, ignition and combustion
process of fuel, ensures the stable combustion in the boiler and
improves the combustion efficiency.
2. Enhanced heat transfer
As the combustion in the furnace is improved and strengthened, and
the temperature of the hot air entering the furnace is increased,
the average temperature in the furnace is also increased, which can
strengthen the radiation heat transfer in the furnace.
3. Reduce the loss in the furnace, reduce the exhaust temperature
and improve the thermal efficiency of the boiler
The chemical incomplete combustion loss can be reduced because the
combustion is stable and the radiation heat exchange is
intensified.On the other hand, the waste heat of flue gas is
utilized by air preheater, which further reduces the loss of
exhaust smoke and improves the thermal efficiency of
boiler.According to experience, when the air preheater in rise by
1.5 ℃, exhaust temperature can reduce 1 ℃. After installation of
air preheater in boiler flue, if we can put the air heat 150-160 ℃,
can reduce exhaust temperature 110-120 ℃, the boiler thermal
efficiency can be increased by 7% - 7.5%.You can save 11 to 12
percent on fuel.
4. Hot air can be used as fuel drying agent
For the layer combustion furnace, hot air can use fuel with high
moisture and ash content. For the power station boiler, hot air is
an important desiccant and coal powder transmission medium of the
powder system.
Features
1. As the flue gas across tube, the flue gas side of the heat
capacity of exile to strengthen, under the same heat transfer
coefficient, wall temperature vertical preheater than ordinary
steel increased 10-30 Degree Celsius, the overall heat transfer
coefficient of about 20.3-24.2W;
2. Two horizontal sealing tube box, the sealed tube box structure
welded high strength, pipe damaged or the overall change can only
block, and heat-packing seal, can only replace the damaged pipe
tube, easy maintenance.
3. The tube air preheater is mainly used for boiler preheater, the
low temperature.
Certificate
Company Introduction
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
