Heavy Duty Steel Finned Tube Heat Exchanger for Power Plant Boiler Economizer

Heavy-duty steel finned tube heat exchanger serves as core heat exchange component of power plant boiler economizer. It recovers residual flue gas waste heat to preheat boiler feed water, effectively reducing fuel consumption, improving boiler thermal efficiency, and lowering exhaust emission temperature. Designed to withstand high temperature, high pressure, flue gas abrasion and corrosive medium, it fits harsh continuous operation working conditions of thermal power boilers.

Main Structural Composition

Carbon Steel Base Tube: Adopts seamless pressure-resistant steel pipe, commonly used materials 20G, 15CrMoG, durable under long-term high pressure and high temperature flue gas impact, anti-deformation and anti-leakage.

Solid Welded Steel Fins: Integral high-frequency welded steel fins, firm combination without loose shedding. Enlarges heat exchange area sharply, enhances heat transfer performance greatly.

Tube Bundle Assembly: Arranged in dense and orderly tube row structure, matched with baffles to guide flue gas flow, ensure full contact between flue gas and tube wall.

Header & Support Frame: Thickened pressure-bearing header ensures stable water circulation. Reinforced support structure resists flue gas vibration and abrasion.

Anti-wear & Anti-corrosion Protection: Wear-resistant welding, anti-corrosion coating applied on windward side and easily worn parts, extend service life in sulfur-containing flue gas environment.

Working Principle

High-temperature flue gas discharged from boiler furnace flows outside the finned tubes.

Low-temperature boiler feed water circulates inside steel tubes.

Waste heat of flue gas conducts to tube wall and steel fins through convection and heat conduction.

Heat transfers to internal feed water, water temperature rises continuously before entering boiler furnace.

Cooled flue gas discharges outward, realizing waste heat recovery and cyclic energy utilization.

Core Performance Advantages

Excellent Waste Heat Recovery EfficiencyExtended fin structure multiplies heat exchange area, fully absorbs flue gas residual heat. Remarkably lifts boiler overall efficiency, cuts coal burning consumption and operation cost for power plant.

Heavy Duty & Strong Abrasion ResistanceWhole steel material owns high mechanical strength. Special anti-wear design copes with long-term scouring of high-speed dusty flue gas, not easy to wear and damage.

High Temperature & High Pressure ResistanceStable operation under boiler conventional working temperature and pressure, no pipe burst, leakage or structural failure, adapts steady long-cycle power generation operation.

Good Anti-corrosion PropertyResists corrosion caused by sulfide, nitride and dust impurities in flue gas, reduces equipment failure rate and maintenance frequency.

Compact Structure & Stable OperationReasonable tube bundle layout saves installation space. Small flow resistance, stable water and gas flow, no blockage, guarantees continuous safe operation of power unit.

Application Characteristics

Applicable to medium and large thermal power plant boilers, industrial waste heat power generation boilers.

Matches boiler flue gas exhaust system, installed inside flue duct with simple assembly and firm fixation.

Effectively lowers flue gas outlet temperature, reduces thermal pollution, meets environmental discharge standards.

Optimizes water supply temperature gradient, relieves boiler heating load and prolongs boiler main body service life.