AIR PRE HEATER
Air pre heaters Air preheater pre-heats (increases the temperature) the air supply to the furnace with the help of hot gases.are heat exchangers to preheat or air heating of the combustion air using flue gas, steam, water, or thermal oil.It is installed between the economizer and the chimney.This type of tubular type air pre-heater consists of a large number of tubes.
Flue gases pass through the tube. Air flows over the tubes. Baffles are provided to pass the air number of times over the tubes. A soot hopper is provided at the bottom to collect the soot.Working of Air Preheaters:In pre heater hot flue gases pass through the tubes of air pre-heater after leaving the boiler or economizer. Atmospheric air is allowed to pass over these tubes. Air and flue gases flow in opposite directions. Baffles are provided in the air pre-heater and the air passes several times over the tubes. Heat is absorbed by the air from the flue gases. This pre-heater air is supplied to the furnace for air combustion.
Specifications
| Product Name | Air pre heaters |
| Brand | Bossmanfilter |
| SHELL & TUBE HEAT EXCHANGERS TYPS | ◼Aftercoolers ◼Condensers ◼Evaporators ◼ Extended Surface Exchangers ◼ Fuel Gas Heaters ◼ Hairpin Heat Exchangers ◼ Heat Recovery ◼ Interchangers ◼ Intercoolers ◼ Land ll Gas Heaters/Coolers ◼ Liquid Coolers ◼ Oil Coolers ◼ Steam Heaters ◼ U-Tube Heat Exchangers ◼ Vaporizers |
| Design operating pressure range | 50 psi to 3000 psi |
| Design operating temperature range | up to 1,200 degrees Fahrenheit (SS to 1,200F, CS to 700F) |
| Exchange tube size | From 3/8 " diameter to 2 " diameter tubes |
| Shell Diameter | 6" to 144" diameter shells up to 30 feet long |
| Tube configuration | ◼Straight tube◼U-tube and floating head designs available ◼ Bare tube◼ low fin◼ high fin extended surface ◼ cyclonic spiral tubing available |
| No of Pass | Single-pass and multi-pass designs available |
| Exchanger end | Bonnet or channel design available |
| Type of tube bundle | Removable and fixed bundle designs available |
| Design code | Available in TEMA, API, ASME Section VIII Div I and other international codes |
| Inlet and outlet connections | Threaded upto 3 inches and others Flanged to ANSI B16.5 or others |
| Shell and tube materials | ◼carbon stell◼stainless steel◼incoloy◼◼low alloy◼titanium◼inconel◼high alloy◼hastelloy◼zirconium◼tantalium |