Deyuan Marine- Marine Boilers – Providing Heat Source for Vessel Power and Daily Systems

On diesel-powered vessels, the boiler does not directly propel the ship, yet it undertakes critical tasks such as heating fuel oil and lubricating oil, warming up the main engine, driving auxiliary machinery, and supplying steam for crew daily needs – making it an indispensable auxiliary equipment in the vessel‘s power plant.

DEYUAN MARINE, a professional marine equipment supplier, offers marine boilers, covering oil-fired boilers, exhaust gas boilers, and composite boilers, providing efficient and reliable heat source solutions for bulk carriers, tankers, container vessels, passenger ships, and offshore platforms.

1. Functions of Marine Boilers

Marine boilers generate steam by burning fuel or recovering waste heat from main engine exhaust, used for:

Application	Description
Fuel Oil Heating	Reduces viscosity to meet combustion requirements
Lube Oil Heating	Maintains proper operating temperature
Main Engine Warm-up	Pre-heats engine before start-up to reduce wear
Daily Living	Heating, hot water, laundry drying, etc.
Auxiliary Machinery	Drives cargo pumps, mooring winches (tankers)
Cargo Heating & Tank Cleaning	Cargo oil heating, tank washing (tankers)

2. Deyuan Marine Boiler Product Series

Deyuan Marine offers the following main boiler types to meet different vessel steam demands:

2.1 Oil-Fired Boiler

Generates steam by burning fuel oil – the most common type of auxiliary boiler on vessels. Deyuan Marine oil-fired boilers are available in vertical and horizontal configurations, with steam capacities from 0.3 t/h to 30 t/h.

Typical Specifications:

Model	Capacity	Working Pressure	Features
HOB Series	0.5 – 6 t/h	≤1.25 MPa	Horizontal, suitable for limited deck height
LSK Series	up to 30 t/h	0.7 MPa	Vertical oil-fired, high capacity

2.2 Exhaust Gas Boiler

Utilises waste heat from diesel engine exhaust (250-400°C) to generate steam, requiring no additional fuel consumption – offering significant energy savings.

2.3 Composite Boiler (Oil-Fired + Exhaust Gas)

Combines oil-fired and exhaust gas boilers in one unit, offering the advantages of both: prioritises exhaust gas waste heat during voyage, automatically supplements with oil firing when exhaust heat is insufficient; completely oil-fired when in port.

Deyuan Marine Composite Boiler Features:

●Compact structure, saves engine room space

●Simple system, fewer accessories

●Maintains hot standby, reduces start/stop heat loss

●Oil-fired section capacity: 0.3 – 4 t/h

●Max working pressure: 0.7 MPa

3.Key Technical Features

3.1 Marine-Grade Design

Deyuan Marine boilers are designed to meet demanding marine conditions, capable of operating under vessel roll, list, and impact conditions. Boiler structures are compact, with dimensions and weights meeting vessel space constraints.

3.2 High Heat Transfer Efficiency

Optimised heat transfer structure design – water tube boilers with flue gas flowing transversely across tube bundles achieve excellent heat transfer and high thermal efficiency. Oil-fired boilers are equipped with high-efficiency burners for complete combustion.

3.3 Fully Automatic Control

Deyuan Marine boilers feature fully automatic control systems providing:

●Automatic ignition and flame failure protection

●Automatic water level regulation and low-level alarm

●Automatic steam pressure control

●Flame monitoring and fault alarm

Supports integration with vessel engine room automation systems, meeting “unmanned engine room” requirements.

3.4 Comprehensive Safety Protection

Protection	Description
Safety Valve	Automatic over-pressure relief
Water Level Protection	Low-level alarm and automatic shutdown
Flame Monitoring	Automatic fuel cut-off on flame failure
Pressure Protection	Automatic shutdown on over-pressure

3.5 Compliance & Environmental Protection

Deyuan Marine boilers are designed to meet MARPOL Annex VI requirements for fuel oil sulphur content, compatible with low-sulphur fuels (≤0.50% m/m global limit, ≤0.10% m/m in ECAs).

4.Typical Applications

Vessel Type	Recommended Configuration	Notes
Bulk carriers / Container ships	Oil-fired + Exhaust gas boiler	Exhaust gas during voyage, oil-fired in
Tankers	2 × Oil-fired or Composite boiler	Cargo heating and pump drive require large steam volume
Passenger ships	2 × Oil-fired boiler	Meets high daily steam demand
Offshore platforms	Oil-fired boiler	Platform operations and daily use
Small vessels	Oil-fired boiler	Capacity 0.4-2.5 t/h

5. Classification Society Approvals

Deyuan Marine boilers are available with certifications from major classification societies: CCS, RMRS, ABS, BV, DNV, LR...Products comply with SOLAS and classification society requirements.

Marine Oil-Fired Auxiliary Boiler - RS approve.

“Marine boilers are the heat source core of a vessel‘s fuel system, daily living systems, and auxiliary power. Deyuan Marine offers a full range of oil-fired, exhaust gas, and composite boilers, with flexible selection based on vessel type, steam demand, and operating profile – providing efficient, reliable, and compliant heat source solutions for shipowners.” – Product Director, Deyuan Marine