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YQWL Thermal Oil Boiler Heater China Factory Suppliers Gas Diesel Fired

High-efficiency YQWL thermal oil boiler from a leading China factory. Featuring a wet back internal combustion two-return structure and top coil tube to prevent flame radiation, increase heating area, and maximize efficiency. Contact the best suppliers for industrial heating solutions.



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The Horizontal/Vertical type YQW/L series represents a pinnacle in thermal energy engineering, specifically designed as a gas or diesel oil fired thermal oil boiler heater. Featuring a sophisticated wet back internal combustion two-return structure, this system is engineered for maximum thermal efficiency and long-term operational stability. By integrating a top coil tube, the design effectively shields the rear wall from direct flame radiation while expanding the heating surface, ensuring an optimized heat transfer process for demanding industrial applications.

Designed for versatility and precision, the YQW/L heater employs micro-positive pressure operation to enhance combustion intensity and eliminate air leakage within the furnace and flue. Coupled with high-efficiency condensation technology and premium refractory insulation, it significantly reduces exhaust gas temperatures and external heat loss. Whether utilized in textile, chemical, rubber, or food processing industries, this boiler provides a scalable, safe, and highly automated heating solution tailored for modern manufacturing needs.

Detailed Parameters

Capacity Range240 kW to 2400 kW (20 to 200 X10⁴Kcal/h) Max Working Pressure1.1 Mpa
Maximum Temperature320 ℃ Thermal EfficiencyUp to 96.28%
Fuel CompatibilityDiesel, Gas, Town Gas, and Oil Control SystemDCS Automatic Computer Control
Circulating Oil Volume18 m³/h to 160 m³/h Boiler Oil Volume0.12 m³ to 1.77 m³
Connecting Pipe Dia.DN 50 to DN 150 Unit Weight1632 kg to 8765 kg

Key Advantages

Advanced Wet Back Design

The internal combustion two-return structure prevents direct flame radiation on the rear wall, extending equipment lifespan.

High Thermal Efficiency

Condensation technology and premium insulation materials minimize heat loss and lower exhaust temperatures.

Optimized Combustion

Micro-positive pressure operation enhances furnace intensity and eliminates harmful air leakage in the flue.

Intelligent Control

Integrated DCS and remote control systems allow for precise, automatic adjustments of the burner and thermal load.

Global Brand Burners

Equipped with international renowned burners to ensure safety, quality, and adaptability to diverse environmental scenes.

Broad Application

Ideal for textile, chemical, wood, oil, rubber, plastics, and food industries for dehydration and concentration.

Product Gallery

Management Platforms

Fuel Versatility

Seamlessly switch between diesel, natural gas, and town gas to optimize operational costs.

Thermal Load Tuning

Automated adjustment of thermal loads to match real-time production demand perfectly.

Remote Monitoring

Full DCS integration allows for remote monitoring and management of boiler status.

Safety Oversight

International burner standards ensure rigorous safety protocols and failure alerts.

Space Optimization

Compact boiler volume achieved through enhanced combustion intensity design.

Energy Efficiency

Real-time efficiency tracking ensures the boiler operates at its peak 96%+ capacity.

Investment Return Comparison

Performance MetricStandard BoilersYQW/L Series
Thermal Efficiency85% - 90%Up to 96.28%
Fuel ConsumptionHigher baselineOptimized Low-Loss
Control PrecisionManual/BasicFull DCS Automatic
Maintenance CycleFrequent scalingExtended (Wet Back)
Heat Loss RateModerateUltra-Low (Insulated)

Frequently Asked Questions

Q: What are the main advantages of the wet back structure in thermal oil boilers?

The wet back structure protects the rear wall of the furnace from direct flame radiation, significantly reducing thermal stress and extending the overall lifespan of the boiler while increasing radiation heating areas.

Q: Can the YQW/L boiler handle multiple types of fuel?

Yes, the YQW/L series is highly versatile and can be configured to utilize diesel, natural gas, town gas, or other oil fuels depending on your local availability and cost requirements.

Q: How does the DCS control system improve efficiency?

The Distributed Control System (DCS) allows for automated adjustments of the burner and thermal load, ensuring the boiler operates at peak efficiency regardless of fluctuations in production demand.

Q: What is the impact of micro-positive pressure operation?

Micro-positive pressure improves combustion intensity, allows for a more compact boiler volume, and eliminates air leakage from the furnace and flue, directly increasing thermal efficiency.

Q: Which industries typically benefit from thermal oil boiler heaters?

They are essential for industries requiring precise high-temperature heating without high pressure, such as textiles, chemical processing, rubber, plastics, food production, and paper manufacturing.

Q: How is the exhaust gas temperature reduced in this model?

By utilizing high-efficiency condensation technology and a strategic two-return structure, the boiler captures more heat before the exhaust exits, thereby lowering the gas temperature and saving energy.

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