ASME Certification Air Preheater In Thermal Power Plant Tubular
Alloy Stainless
Product Introduction
Air preheater (air preheater) have also been referred to as "for
the air preheater, is to improve the boiler heat transfer
performance, reduce the heat loss of the role of the air preheater,
a preheating equipment is to remove the tail flue gas of boiler to
carry heat, through the heat sink to before entering the boiler
air, commonly referred to as the temperature of air is preheated to
a certain for a number of used in coal-fired power plant boiler air
preheater can be divided into the tube box type rotary type two
kinds, including rotary heating surface is divided into the wind
shield rotary and rotary type two kinds of power station boiler
heating surface rotary preheater is often adoptedThe application in
boiler is generally two - bin three - bin four - bin type, which is
often used in circulating fluidized bed boiler
Working principle
The rotary air preheater, for example shows that the principle of
air preheater, the work will slow the rotation of the, the flue gas
into the flue gas air preheater lientang then expelled, and carry
the heat in flue gas will be absorbed by the cooling fin in air
preheater, after the air preheater, slow rotation and fin movement
to the air side, to transfer heat to the air before entering the
boiler air preheater in the application of the boiler is three more
points bin type, with fire alarm system gap adjusting air preheater
system and frequency conversion control system of simple operation,
which is convenient to useIt is widely used in flue gas boiler
system because of its safe operation and high heat exchange
performance
Effect
1. Improve and intensify combustion
After passing through the waste heat boiler, the air enters the
furnace, accelerating the drying, ignition and combustion process
of the fuel, ensuring the stable combustion in the boiler and
improving the combustion efficiency.
2. Enhance heat transfer
Because the combustion in the furnace has been improved and
strengthened, and the temperature of hot air entering the furnace
has been increased, the average temperature level in the furnace
has also been increased, which can strengthen the radiation heat
transfer in the furnace.
3, Reduce the loss in the furnace, reduce the smoke exhaust
temperature, improve the boiler thermal efficiency
The chemical incomplete combustion loss can be reduced due to the
stable combustion in the furnace and the intensification of
radiation heat exchange.On the other hand, the air preheater USES
flue gas waste heat, which further reduces the smoke exhaust loss,
thus improving the boiler thermal efficiency.According to our
experience, when the air is increased by 1.5℃ in the preheater, the
smoke exhaust temperature can be reduced by 1℃. After installing
the air preheater in the boiler flue, if the waste heat of the air
is 150-160℃, the smoke exhaust temperature can be reduced by
110-120℃, and the thermal efficiency of the boiler can be increased
by 7%-7.5%.It can save 11-12% fuel.
4. Hot air can be used as fuel desiccant
For the layer burning furnace, the hot air can use the fuel with
higher moisture and ash content, and for the power station boiler,
the hot air is an important desiccant for the powder system and the
coal conveying medium.
Company Information
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.
