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Thin Walled Steel Tubular Air Preheater For CFB Coal - Fired Boilers In Power Station
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Brand Name:HD Boiler
Model Number:Boiler Air Preheater
Certification:ASME, SGS, ISO9001
Delivery Time:120 days
Company Data
Verified Supplier
Contact Person
Sandy Chen
Business Type:
Manufacturer Trading Company
Officials:
Address: N0.1, Dongli Road, Donglai, Zhangjiagang City, Jiangsu Province, China
Quality:
Quality Certifitation Available
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Product Details
Company Profile
Product Details
Thin-walled Steel Tubular Air Preheater for CFB Coal-fired Boilers in Power Station and Industry
General Introduction
Air preheater is a kind of equipment which can improve the heat
exchange performance of the boiler and reduce the energy
consumption. The function of the air preheater is to heat the flue
gas discharged from the tail flue of the boiler and transmit it to
the air before entering the boiler through the radiator, so as to
preheat the air to a certain temperature.
The air preheater is generally used for coal-fired boilers in power
station.It can be divided into tubular type and rotary type. The
rotary type can be further divided into wind hood rotary type and
heating surface rotary type.Power stations usually use the heating
surface rotary air preheater. Generally, the application in boilers
is two-compartment, three-compartment and four-compartment, among
which the four-compartment is more commonly used in CFB boilers.
Working principles
Take the rotary type as a example to illustrate the working
principles of air preheaters, when under operation, it would be
slowly rotating, and exhaust gas will enter the gas flue side of
air preheater, and then be dicharged. The heat carried by the gas
flue will be absorbed by the cooling ribs of the air preheater,
then the air preheater will be rotating slowly, the cooling ribs
work to the side of the air, delivering the heat to the air before
the air enters the boiler.
The air preheaters applied in boilers are mostly three warehouses
type with fire alarm system, internal adjustment system and
frequency conversion control system. It is convenient to use air
preheaters with easy operation and safe running, meanwhile it can
improve the performance of heat transferring of the bouler system,
thus it is very common to apply air preheaters in the system of
boiler gas flue.
Functions
1. Improve and enhance combusion
The air through the air preheater enters the boiler inside, and
speed up the fuel processes of drying, ignition and combusion, and
makes sure the stable combusion inside the bouler, and improve the
combusion effieciency.
2.Enforce heat tranfer
Due to the improvement and enforcement of combusion in the boiler,
as well as the increase of hot wind temperature when entering the
boiler, the average temperature inside is increased, too. This can
enforce the radiation heat transferrring in the boiler.
3.Reduce the boiler loss, decrease the exhaust gas temperature and
improve the thermal efficiency of the boiler.
Because the combusion inside is stable, and the radiation heat
transferring is enhanced, it can reduce the loss caused by chemical
incomplete combusion. On the other hand, the air preheater take the
advantage of gas flue heat to further reduce the exhaust loss,
which thus improves the thermal efficiency. According to
experience, when the air tempeature inside the air preheater is
increased by 1.5 degrees, the temperature of gas flue can be
decreased by 1 degree. If installed, the air preheater can preheat
the air by 150-160 degrees, then can reduce the temperature of gas
flue by 110-120 degrees, and increase the thermal efficiency by
7-7.5% as well as save fuel by 11-12%.
4.the heat air can be the fuel desiccant.
For layer-burning boilers, it is okay to use fuel whose miosture
and ash content is high when preheated air is available. For power
station boilers, hot air is an important desiccant for fat power
system and medium to convey coal powder.
Classification
According to the way of heat transfer, the air preheater can be
divided into two types:heat conduction type and regeneration
type.Among the heat conduction type, tubular air preheater is most
commonly used.With the increase of boiler parameters and capacity,
the heating surface of tubular air preheater increases, which
brings difficulties to the arrangement of the tail heating surface.
Therefore, most of the large capacity units adopt a compact, light
weight rotary air preheater. Air preheater is generally divided
into three types: plate type, rotary type and tubular type.
The main heat transfer component of tubular air preheater is
thin-walled steel tube. The tubular air preheaters are mostly
cubic. The steel tubes are arranged vertically and staggered with
each other. Both ends are welded on the upper and lower tube
sheets.The tubular air preheater is equipped with an intermediate
tube sheet in the tube box. The flue gas passes through the
preheater up and down the pipe, while the air passes through the
preheater horizontally to complete heat transfer.
Tubular air preheater is widely used in power station boilers and
industrial boilers because of its advantages of good sealing, high
heat transfer efficiency, easy manufacturing and processing. The
shortcomings of tubular air preheater are large volume, easy ash
plugging of steel tube content, difficult cleaning and easy wear
and
Parameter
Layout item | Horizontal layout | Vertical layout |
| Tube arrangement | staggered arrangement / | staggered arrangement / |
| Sealing of pipe and plate | Packing heat- resistant material/ | welding |
| Anti-wearing | a,when gas scours external tube, welcoming smoke tubes have
protective tile | |
Enamel air preheater products are classified as following by
application
1.Enamel heat exchanger designed for denitration renovation
projects
2.Enamel heat exchanger for circulating fluidized bed boiler and
pulverized coal boilers Heat
exchanger parts for garbage incinerators and biomass boilers
3.Heat exchanger parts for grate furnaces, like chain grate
furnaces4.Heat exchanger parts for gas-fueled boilers, such as
kerosene boilers, coke ovens, etc.
Company Profile
Zhangjiagang HuaDong Boiler Co., Ltd.
Hua Dong Boiler Co., Ltd. is a high-tech enterprise specialized in manufacturing boilers. Established in early 1985s, has two manufacturing bases, this company covers 400,000㎡ with fixed assets amounting to USD 110,000,000. There are 1100 employees including 150 technicians and 600 coded welders. Hua Dong holds the manufacturing licenses for Grade A boilers and Grade A1&A2 pressure vessels issued by Chinese General Administration of Quality Supervision, Inspection and Quarantine; also it holds the "S" and "U" "NB" stamps issued by American Society of Mechanical Engineers; meanwhile, this Company has passed the certification of ISO9001, SO3834, EN12952 Quality Management System.
"Hua Dong" boilers include Utility Boiler, HRSG Boiler, coal-fired , oil(gas) -fired, coal-water-slurry-fired and garbage-fired steam/hot water boilers, organic heat carrier boilers, etc., and Boiler spare parts (Economizer, Finned tube, Header, Steam drum, Superheater, Water wall panel, Air preheater, Cyclone separator, etc., which are widely used in power generation, heat supply, chemical engineering, textile, food, paper, road building, plastic, rubber and wood working industries. "HD" boilers are honored as "Famous Production in Jiangsu Province", " Jiangsu High-Tech Product" and "Jiangsu Energy-Saving Product". "HD" brand is a "Famous Brand in Jiangsu Province". We are a qualified supplier for the top three boiler manufacturers in China(Harbin Boiler Co., Ltd., Dong Fang Boiler Group Co., Ltd., Shanghai Boiler Works Ltd.,). So far, Hua Dong Boilers have served 10000 customers, which sell well all over China and are exported to USA, Australia, Russia, Kazakhstan, India, Indonesia, South Africa, Brazil, and Southeast Asia.
We strive to manufacture "Safe, Efficient, Energy-Saving and Environment-Friendly" boilers, provide new-type products in excellent quality, serve users sincerely to their satisfaction, and be a top supplier of boilers in China.
Declaration
Zhangjiagang Hua Dong Boiler Co.,Ltd has no subsidiaries.
Packaging & Shipping
Company Business
Our products have been wildly used in power plants and large international companies overseas.
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