Tubular Type Air Preheater APH Shell and tube dual pass air preheaters none pressure parts

Air Preheaters (APH)

• Air Preheaters (APH) is the Shell and tube type Heat Exchangers used for preheating the air which is fed to the boiler or furnaces/kilns for combustion of fuels. Air Pre heater’s primary objective is to extract the waste heat from the flue gases leaving the boiler.
• Thermodyne Engineering Systems manufacture Air Preheaters and are given as a standard side accessory along with the main equipment – Boiler, in a Packaged Type Boiler, Combi Boilers.

Working of Air Preheaters(APH)

• Air Preheaters have a shell and tube type construction where exhaust heat from the flue gases is transferred to the air when they come in indirect contact with each other.
• Air Preheaters consist of a shell where tubes are arranged in a square or triangular pitch and are welded to a tube plate. Depending upon the type of operation and ease of cleaning, flue gases & air can be allowed to travel either shell side or tube side interchangeably.

Tubular type Air Preheater

• Tubular preheaters consist of straight tube bundles which pass through the outlet ducting of the boiler and open at each end outside of the ducting.
• Inside the ducting, the hot furnace gases pass around the preheater tubes, transferring heat from the exhaust gas to the air inside the preheater.
• Ambient air is forced by a fan through ducting at one end of the preheater tubes and at other end the heated air from inside of the tubes emerges into another set of ducting, which carries it to the boiler furnace for combustion.

Air Preheater Pros

• 2 pass design to extract maximum waste heat from flue gases leaving the boiler.
• It is used to extract waste heat from the flue gases leaving the boiler exhaust thereby increasing the efficiency of a boiler by 2-3 %.
• It is used to preheat the fuel which further increases the boiler efficiency.
• Payback time is less.

Air Preheater Cons

• Adding and equipment or accessory in the path of flue gases increases flue gas pressure drop down the line, so the size of Induced Draft Fan increases.
• Buy Air Preheater from Indian Manufacturer: Thermodyne Engineering Systems: Contact Us
• Other Industrial Steam Boiler Ancillaries
• Superheaters
• Economizer
• Bag filter

Details

    Dehai Boiler is a manufacturer of A-class boiler(Power station boiler,industrial boiler,HRSG,waste-to-energy boiler,biomass boiler) and correlated A-class pressure parts intergrating the design,fabrication,installation,repair and mainteance.

Dehai has ISO9001:2008 certificate issued by France AFAQ-EAQA Ltd,A-class boiler manufacturing license,ASME S Stamp and U Stamp authorized certificate.

    Through effective management system and high quality products,Dehai became the qualified supplier of many famous boiler factories and energy companies and has won a lot of stable customers both domestic and abroad ,such as :Amec Foster Wheeler,Alstom,Dongfang Boiler,Harbin Boiler,Hangzhou Boiler,etc.

    Based on the business idea of "High quality for survival and perfect service for development",we shall care for customers' demand and keep improving our work permanently. To create Dehai brand,is to serve clients with our improved products and better performance.

    Dehai is located in Economic and Technological Development Zone,Zhangjiagang City,Jiangsu Province. S38 highway Zhangjiagang exit is about 1.5 kilometers to the north of our company and the traffic is very convenient.