Gas Heavy Oil Fired Steam Boiler

The Gas Heavy Oil Fired Steam Boiler is a high-efficiency thermal energy conversion device that integrates both gas and heavy oil dual-fuel compatibility. Its core function is to convert the chemical energy of fuel into steam energy. Widely used in industrial production, district heating, commercial services, and other fields, the Gas Heavy Oil Fired Steam Boiler boasts advantages such as fuel flexibility, high efficiency and energy saving, and environmental compliance, making it a preferred thermal energy solution in the context of energy structure transformation. It can meet large-scale steam demand and adapt to flexible energy needs under complex operating conditions, balancing practicality and economy.

1. Water Inlet System: Water treated by the water softening equipment enters the water tank and is injected into the boiler to the set water level via the feedwater pump.
2. Ignition Procedure: The PLC controller issues a command, and the burner fan performs pre-purge to remove residual combustible gases from the furnace; subsequently, the ignition transformer discharges, opening the gas valve and establishing a flame.
3. Pressure Control: As combustion progresses, the steam pressure gradually increases. The pressure controller automatically adjusts the high/low flame or proportional adjustment of the combustion intensity according to the set value to maintain a constant steam pressure supply.
4. Steam Output: The main steam valve opens, and saturated steam is delivered to the steam-consuming equipment through pipelines.

• High Efficiency and Energy Saving: Thermal efficiency reaches 92%-98%. The Gas Heavy Oil Fired Steam Boiler uses a corrugated furnace and threaded flue pipes to enhance heat transfer and reduce exhaust gas temperature.
• Clean and Environmentally Friendly: Standard low-NOx combustion technology ensures flue gas emissions meet the strictest national environmental standards, producing no black smoke and low noise.
• Fully Automated: PLC intelligent control system, one-button start, automatic water intake, automatic combustion, and automatic load adjustment, enabling unattended operation.
• Safe and Reliable: Multiple pressure protection interlock devices provide multiple protection functions including water shortage, overpressure, flameout, and high flue gas temperature alarms.
• Rapid Start-up: Small boiler water volume and optimized furnace structure design allow for a cold start-up to steam generation in just 5-8 minutes, resulting in rapid thermal efficiency conversion.

Three-Pass Wet-Back Structure

The Gas Heavy Oil Fired Steam Boiler adopts the internationally popular center-fired or three-pass structure, with a low-positioned combustion chamber and symmetrically distributed flue tubes. The wet-back design completely immerses the rear smoke box in water, effectively avoiding the risk of the rear smoke box burning due to high temperatures and significantly extending the boiler's lifespan.

Corrugated Furnace and Threaded Flue Tubes

Corrugated Furnace: Not only increases the radiant heating area but also alleviates the stress caused by thermal expansion, improving the boiler's elasticity and safety.

Threaded Flue Tubes

Turbulence is generated when flue gas flows inside the tubes, disrupting the laminar boundary layer, enhancing convective heat transfer, and significantly reducing the exhaust gas temperature.

Superior Insulation and Appearance

High thermal resistance fiber cotton is used as the insulation material, and the outer layer is wrapped with mirror stainless steel plate or embossed color-coated plate, resulting in minimal heat loss, an attractive appearance, and corrosion resistance and durability.

To ensure long-term safe and stable operation, the product strictly adheres to the boiler specification standards and is equipped with the following interlocking protections:

• Low Water Level Protection: When the water level falls below the limit level, the burner stops working and an alarm sounds.
• Steam Overpressure Protection: When the pressure exceeds the set upper limit, the burner automatically shuts down; when the pressure exceeds the safety valve's trip pressure, the safety valve automatically releases pressure.
• Flameout Protection: In case of ignition failure or flameout during operation, the fuel supply is immediately cut off, and the post-purge procedure is initiated.
• Overheating Flue Gas Protection: When the exhaust gas temperature rises abnormally, a warning is issued and the unit shuts down.

Hot Tags: gas heavy oil fired steam boiler, China gas heavy oil fired steam boiler manufacturers, suppliers, factory