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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

 

 
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.