Heavy Fuel Oil Heater for Marine Fuel Systems | Shell-and-Tube Preheater for Vessel HFO Circuit

Heavy fuel oil heater is a key shell-and-tube component integrated into complete marine fuel supply systems. Most large marine diesel engines run on heavy fuel oil (HFO), which relies on this preheater to achieve qualified fluidity for three core working processes: fuel transshipment, purification treatment and engine injection.

Working Principle

High-temperature steam or hot fresh water circulates inside heat transfer tubes, while cold high-viscosity heavy fuel oil flows across the shell side. Heat transfers through tube wall to raise HFO temperature and cut its viscosity obviously.

Three Core Preheating Functions

Smooth Transshipment: Lower oil viscosity to avoid pipeline clogging and reduce pump load during fuel delivery;

Effective Purification: Proper preheating helps water and impurity separate out efficiently in fuel oil purifiers;

Perfect Injection: Preheated HFO gets fine atomization when passing engine nozzles for full and stable combustion.

Product Features

Professional shell-and-tube structure customized for high-viscosity heavy fuel oil, anti-coking and anti-blocking;

Optional copper alloy or stainless steel tube bundle with excellent thermal conductivity;

Detachable end cover design for easy internal cleaning of oil residue and regular maintenance;

Custom heating capacity and interface size to match various marine diesel engine fuel parameters;

Marine-grade pressure-resistant construction adapting continuous long-term ship navigation.

Application Scope

Main engine fuel preheating system of cargo ships, tankers and bulk carriers

Preheating equipment before marine fuel oil separators

Auxiliary boiler heavy fuel feeding heating circuit

Offshore platform and large fishing vessel diesel fuel supply system