Customized High Performance-Cost Ratio Boiler Air Preheater for
Industry
Product Introduction
- Air pre-heater is a kind of equipment used to improve the heat
exchange performance of the boiler and reduce energy consumption.
Air preheater is generally divided into three types: plate type,
rotary type and tube type.
- Taking the rotary type as an example, the working principle of air
preheater is introduced.
- A large number of unburned combustibles will deposit on the heat
transfer elements, which may cause the air preheater to ignite. The
reasons for the ignition and the countermeasures are described in
detail. The analysis of the switch-off and the treatment of air
leakage are also introduced in detail.
Principle
- Taking rotary air preheater as an example, this paper illustrates
the principle of air preheater. When working, it rotates slowly .
The flue gas will enter the flue gas side of air preheater and then
be discharged. The heat carried by the flue gas will be absorbed by
the radiator in the air preheater. After that, the air preheater
rotates slowly, and the radiator moves to the air side, then
transfers the heat to the air before entering the boiler.
- The application of air preheater in boilers is mostly three-storey
type with fire alarm system, clearance adjustment system and
frequency conversion control system. Air preheater is widely used
in flue gas boiler system because of its convenient use, simple
operation and safe operation, and can improve the heat exchange
performance of the boiler system.Taking rotary air preheater as an
example, this paper illustrates the principle of air preheater.
When working, it rotates slowly. The flue gas will enter the flue
gas side of air preheater and then be discharged. The heat carried
by the flue gas will be absorbed by the radiator in the air
preheater. After that, the air preheater rotates slowly, and the
radiator moves to the air side, then transfers the heat to the air
before entering the boiler.
Functions
1. Improve and Strengthen Combustion.
The air after the heat exchanger enters the furnace, which
accelerates the drying, ignition and combustion process of the
fuel, ensures the stable combustion in the boiler and improves the
combustion efficiency.
2. Enhancing 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 raised, so the radiation heat transfer in the furnace
can be strengthened.
3. Reducing the loss in the furnace, lowering the exhaust gas
temperature and improving the thermal efficiency of the boiler.
Because of the stable combustion in the furnace and the enhanced
radiation heat exchange, the chemical incomplete combustion loss
can be reduced. On the other hand, the waste heat of flue gas is
utilized by the air preheater, which further reduces the loss of
exhaust gas, thus improving the thermal efficiency of the boiler.
According to experience, when the air in the preheater rises by 1.5
C, the exhaust gas temperature can be reduced by 1 C. After
installing the air preheater in the boiler flue, if the air waste
heat can be 150-160 C, the exhaust gas temperature can be reduced
by 110-120 C, and the thermal efficiency of the boiler can be
increased by 7%-7.5%. Fuel can be saved by 11%-12%.
4. Hot air can be used as fuel desiccant.
Hot air is an important desiccant and pulverized coal conveying
medium for grease powder system in power plant boilers.
Certification
Advantages
1. Preheated air increases combustion rate and then increases steam
generations of boiler. |
2. Due to higher temp. of air,furnace temp.increases,so low grade
coal can be burnt efficiently. |
3. Air heated by heat of exhaust gases.It reduces fuel
consumptions.Therefore thermal efficiency of boiler increased. |
Different types
For the use in Steam Generators (boilers)in Thermal power stations
of Utility power stations, there are two types of design of the
Airpreheaters. One is a tubular type built into the boiler outlet
Flue_gas ducting and another one is of the regenerative type known
as Ljungstrom (named after the name of inventor) Regenerative Air
Pre Heater(RAPH),a rotating type. This may be horizontal (now very
common in power generation utilities) or vertical.
Company Profile
Our main products cover 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.
1100 employees, 400,000 ㎡ with fixed assets amounting to USD
110,000,000, 34 years experience, ISO9001, SO3834, EN12952
certificated, 150km expressway to Shanghai,60km state road to
Suzhou or Wuxi, this is how we keep superior quality and
competitive offers for global valued customers.
Our products' quality is ensured by advanced, excellent facilities
and manufacturing equipment. We have introduced 400 sets of
advanced processing and inspection equipment, including plasma
cutting machine, NC drilling equipment, automatic welding system,
welding equipment and real-time online imaging detection system,
etc., which successfully ensure excellent quality of our products.
Collect all parameters for product design, make design acording to
the Supervisory Regulations on Boiler Safety Technology, other
laws, rules, regulations and professional standards, and 100% meet
the product standards and customers' requirements.
The quality and technical supervision administration authorizes the
inspection agency stationed on site to supervise, inspect and test
the process of boiler manufacturing.Accept supervision or
confirmation of the third party or Customer's representative over
the process of boiler manufacturing.
Different types
For the use in Steam Generators (boilers)in Thermal power stations
of Utility power stations, there are two types of design of the
Airpreheaters. One is a tubular type built into the boiler outlet
Flue_gas ducting and another one is of the regenerative type known
as Ljungstrom (named after the name of inventor) Regenerative Air
Pre Heater(RAPH),a rotating type. This may be horizontal (now very
common in power generation utilities) or vertical.
