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SZS Double Drum Water Tube Steam Boiler Factory China Suppliers

Looking for reliable China suppliers? Our SZS series gas-fired double-drum water-tube boilers from our professional factory feature forced circulation to prevent gasification and ensure high efficiency.



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The SZS Series represents the pinnacle of industrial steam generation, featuring a sophisticated double-drum water-tube design specifically engineered for high-efficiency gas and diesel firing. By utilizing a forced circulation system in high-temperature zones, the SZS series ensures consistent cooling of all heating surfaces, effectively eliminating the risk of gasification and ensuring long-term structural integrity for demanding industrial environments.

Designed for safety and environmental sustainability, these boilers integrate full-membrane water-cooled walls and micro-positive pressure combustion to eliminate pollution in the operating area. With advanced aluminum silicate fiber insulation and refractory cement, the system maintains a surface temperature below 45°C, drastically reducing heat loss and optimizing overall thermal efficiency for maximum cost-effectiveness.

Detailed Parameters

Capacity Range10 - 50 t/h Rated Pressure1.25 (1.6) Mpa
Steam Temp194 (204) ℃ Thermal EfficiencyUp to 93.2%
Boiler Weight30.6 - 70 T Gas Consumption790.3 - 3898 Nm³/h
Diesel Consumption679.3 - 3398 Kg/h Max LengthUp to 12,820 mm
Steam OutletDN 150 - 300 Cooling StructureFull-membrane Water-wall

Key Advantages

Maximum Safety

Equipped with explosion-proof doors and precision flame detectors to ensure reliable, accident-free operation.

Forced Circulation

Advanced high-temperature zone circulation prevents overheating and ensures reliable cooling of heating surfaces.

High Thermal Efficiency

Narrow-pitch tube-membrane walls improve airtightness and maximize heat transfer efficiency.

Eco-Friendly Combustion

Micro-positive pressure combustion ensures a pollution-free operating environment for plant personnel.

Easy Maintenance

Strategic fire viewing holes and rear inspection doors facilitate effortless overhauling and cleaning.

Superior Insulation

High-quality aluminum silicate fiber keeps body temperatures below 45°C to minimize energy waste.

Product Gallery

Management Platforms

Fuel Versatility

Optimized for both natural gas and diesel oil, providing flexible energy sourcing options.

Pressure Control

Precise rated pressure management up to 1.6 Mpa for various industrial applications.

Safety Monitoring

Integrated flame detection and explosion-proof systems for 24/7 operational security.

Heat Loss Tracking

Advanced insulation monitoring ensures casing temperatures remain under 45°C.

Capacity Scaling

Scalable models from 10t/h to 50t/h to grow with your production needs.

Maintenance Access

Designed with dedicated viewing holes and doors for rapid inspection cycles.

Investment Return Comparison

FeatureStandard BoilersSZS Series Boiler
Thermal Efficiency85% - 88%Up to 93.2%
Heat Loss ControlModerateUltra-Low (
Safety SystemsBasicExplosion-proof + Flame Detect
Emission LevelStandardPollution-free (Micro-positive)
Operational LifeAverageExtended (Forced Circulation)

Frequently Asked Questions

Q: What makes the SZS double drum design superior to single drum boilers?

The double drum design allows for better water circulation and steam separation, reducing the risk of overheating and allowing for higher capacities (up to 50 t/h) with greater stability.

Q: How does the SZS series ensure environmental safety in the workplace?

It utilizes micro-positive pressure combustion and full-membrane water-cooled walls, which prevent leaks and ensure that the operating environment remains pollution-free.

Q: Which fuels are compatible with the SZS series boilers?

The SZS series is specifically engineered for versatility, supporting both natural gas and diesel oil as primary heating fuels.

Q: How is heat loss minimized in these industrial boilers?

We use a combination of high-quality aluminum silicate fiber and refractory cement, maintaining the outer furnace body temperature below 45°C.

Q: Is the SZS boiler easy to maintain and clean?

Yes, it features dedicated fire viewing holes at the front and back of the drums, as well as a rear inspection door for easy access during overhauls.

Q: What is the maximum steam capacity available for the SZS series?

The SZS series offers a wide range of models, with the largest unit (SZS50) capable of producing 50 tons of steam per hour.

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