Energy Saving Stainless Steel Plate Type Air Preheater For Petrochemical Industry

Energy Saving Stainless Steel Plate Type Air Preheater For Petrochemical Industry

Stainless Steel Plate Preheater replaces the traditional tube and heat pipe by plate sheets as heat transfer components. Gas and air (coal gas) transfer heat through the plate sheets where the hot fluid and cold fluid are completely separated. The wall surface of the flowing channel keeps changing and results in enhanced turbulence of flowing fluid so that the performance of heat transfer is improved. Moreover, the plate sheet has a smooth surface and boasts lower fouling resistance.

Compared with heat pipe heat exchanger, it eliminates the risk of heat transfer tube burst due to high temperature and low temperature corrosion and potential blockage of heat pipe. While compared with tube heat exchanger, it is superior in the compact size and extended service life.

Work principle/flow

The Stainless Steel Plate Preheater is used for waste heat recovery system of heater, where the plate air preheater is arranged. The hot flue gas exhausted from the heater is led into the air preheater to preheat the air before it is introduced into the heater for combustion. Then the flue gas is led into the low temperature & corrosion resistant enamel plate air preheater, where the flue gas is cooled down to 100℃ and then discharged from the chimney.

Advantages

--- High efficiency: Considering potential changes in temperature & size after the heating process, variable flowing channel is designed to ensure optimized overall heat transfer coefficient and minimized resistance drop;

--- Low pressure drop:Thanks to the straight channel, bigger flow area and shorter distance, medium flowing in the plate type preheater encounters less resistance drop.Compared with heat pipe type preheater, the plate type reduced the resistance drop by 20%-60%, which is only 40%-60% of the tubular type;

--- High heat resistant: The heat transfer components are made of stainless steel and can operate safely at a temperature up to 450℃;

--- Compact structure: For plate preheater, the compact ratio is around 160m²/m³ vs. 60m²/m³ for tubular type (heat pipe type), which is around 3 times higher.

Application

Project: 150t/h Coal fired boiler revamp project

Enduser: Sinopec Jiujiang Company

Model: QYDYD-16-145-25153V