Views: 0 Author: Site Editor Publish Time: 2026-06-16 Origin: Site
Gravity-type heat pipe APH, gas-to-gas waste heat recovery unit, widely used for boiler/furnace flue gas heat recycling to preheat combustion air, anti-dew point corrosion design for sulfur-containing exhaust gas
Each single heat pipe is a hermetically sealed vacuum tube filled with working fluid (water/ammonia/ethanol):
Evaporation Section (Flue Gas Side): High-temp flue gas heats internal liquid medium → liquid vaporizes and absorbs latent heat
Condensation Section (Fresh Air Side): Hot vapor flows to cold end, condenses and releases heat to heat incoming cold combustion air
Condensed liquid flows back to hot end by gravity, continuous passive phase-change circulation with zero auxiliary power consumption
Middle partition completely separates flue gas & air channels, zero cross leakage between two media.
Flue Gas Inlet Temp | Base Pipe Material | Internal Working Fluid | Application Field |
|---|---|---|---|
80~260℃ | Carbon steel / ND anti-dew steel | Deionized water | Food boiler, gas-fired industrial boiler |
260~450℃ | 304 / 316L stainless steel | Ammonia / methanol | Petrochemical furnace, waste incinerator |
>450℃ | Alloy / Inconel tube | Potassium-sodium alloy | Cement kiln, steel plant hot blast stove |
Industrial Application Scenarios (Waste Heat Recovery)
Industrial Boiler System: Coal/gas/biomass boiler flue gas recovery, preheat combustion air, improve boiler efficiency by 6~12%, cut fuel consumption 7~15%
Petrochemical Refinery: Atmospheric/vacuum furnace, reformer heater exhaust heat recycling (flue gas 250~380℃)
Food Processing Plant: Thermal oil boiler & drying line waste heat, preheat workshop fresh ventilation air
Steel/Cement/Kiln: High-temperature kiln exhaust waste heat recovery for hot blast preheating
