Views: 0 Author: Site Editor Publish Time: 2026-05-08 Origin: Site
Plate type air preheater is a compact, high-efficiency gas-to-gas heat exchanger that recovers waste heat from hot exhaust/flue gas to preheat incoming combustion/process air, widely used in industrial waste heat recovery systems for energy saving and emission reduction.
Core Mechanism: Heat transfer via conduction through corrugated metal plates, with counterflow/crossflow arrangement (hot gas and cold air flow in opposite/cross directions).
Process:
Hot exhaust/flue gas (150–400°C) flows through one side of plate channels, releasing heat。
Cold fresh air flows through the other side, absorbing heat and being preheated。
Corrugated plates induce turbulence, enhancing heat transfer efficiency。
Preheated air (120–350°C) is sent to boilers, furnaces or reactors; cooled exhaust gas is discharged after treatment。
Plate Core: 1.2–2mm thick corrugated plates (stainless steel 304/316, Corten steel or enameled carbon steel), modular design for flexible assembly。
Sealing: High-temperature gaskets or welded joints to prevent leakage and cross-contamination。
Frame: Carbon steel support structure, easy for disassembly and maintenance。
High Efficiency: 20–30% higher heat transfer coefficient than tubular type; fuel savings up to 10–15%。
Compact Size: 1/3 volume of tubular preheater, ideal for space-constrained retrofits。
Modular & Maintainable: Individual plate modules can be replaced/cleaned without full shutdown。
Low Leakage: Tight sealing design, air leakage rate ≤1%。
Corrosion Resistance: Stainless steel/enameled materials resist acidic flue gas corrosion。
Power & Heating: Boiler flue gas heat recovery for power plants, heating stations。
Petrochemical: Heating furnaces, reformers, cracking furnaces in refineries and chemical plants。
Metallurgy: Steel mills, non-ferrous smelters, blast furnaces。
Environmental Protection: Waste incineration plants, VOCs catalytic oxidation systems。
Food & Pharma: Drying processes, hot air supply systems。
