Hybrid Water-Tube Rotary-Grate Steam Boiler
The hybrid water-tube rotary grate steam boiler is an innovative solution that combines a top-mounted Scotch-type three-pass shell with a bottom-mounted water-tube radiation section, offering the advantages of both systems in a single unit. It automatically processes coal and biomass using a rotary grate solid fuel system, providing flexibility with solid, liquid, or gaseous fuel options. It delivers high performance with thermal efficiency exceeding 90%, rapid steam production, and stable operating pressure. It enables safe and economical operation through fully automatic control and multi-stage safety systems.
Hybrid Water-Tube Rotary-Grate Steam Boiler
The hybrid water-tube rotary-grate steam boiler is an innovative design that combines the advantages of fire-tube (Scotch-type) and water-tube boiler systems in a single shell. The upper part of the boiler has a Scotch-type three-pass structure, while the lower part contains a water-tube radiant section. This special combination brings together the large water volume and stable steam storage of the Scotch type with the high thermal efficiency and fast steam generation of the water-tube design.
The water-tube radiant section in the lower part is designed to operate in integration with the rotary-grate solid fuel system. The rotary grate automatically feeds coal and biomass into the furnace, advances them throughout combustion and discharges the ash automatically, providing continuous and balanced combustion. The three-pass Scotch shell in the upper section, in turn, recovers the maximum possible heat from the hot flue gases.
Thanks to this hybrid design, the boiler delivers thermal efficiency above 90%, stable operating pressure and effective heat transfer. Heat losses have been minimized and thermal efficiency raised to the highest level, resulting in a stable, efficient and economical solution under varying operating conditions. Multi-fuel flexibility, with the ability to run on solid, liquid or gaseous fuel, gives plants wide latitude in their choice of fuel.
Technical Specifications
- Hybrid design: Scotch-type three-pass structure on top, water-tube radiation zone on the bottom
- Solid fuel (coal/biomass) combustion system with a rotary grate
- Multi-fuel option: capable of operating with solid, liquid, or gaseous fuels
- High thermal efficiency of over 90%
- Automatic fuel feeding and automatic ash removal
- Large water volume and high steam storage capacity
- Rapid steam production and stable operating pressure
- Compact and durable body construction
- Low emissions and eco-friendly operation
- Fully automatic control system and multi-stage safety features
- Manufactured in compliance with EN 12952 and TS 377 standards
- Various capacity and operating pressure options
Optional Features:
- Stoker or rotary grate combustion system
- Economizer or recuperator (flue gas heat recovery system)
- Automatic water feed and level control system
- Safety valves (EN ISO 4126-1 compliant)
- Steam collector and blowdown system
- Fuel storage bunker and screw feeder
- Scotch + water-tube hybrid design — the advantages of two systems in a single unit
- High thermal efficiency of over 90%
- Flexibility for multiple fuels: solid, liquid, or gas
- Automatic solid fuel feeding and ash removal with a rotary grate
- Rapid steam production and stable operating pressure
- Low emissions, environmentally friendly, and economical operation
Food and Beverage: Dairy products, canned goods, tomato paste, and oil production—pasteurization, sterilization, and cooking processes
Textiles and Dyeing: Dyeing, finishing, drying, and printing processes
Energy and Process Plants: Production lines requiring continuous, high-capacity steam
Chemicals and Pharmaceuticals: Reaction heating, distillation, and sterilization processes
Lumber, Wood, and Particleboard: Drying ovens and steaming — economic advantages with biomass fuel
Hotels, Hospitals, and Laundries: Kitchen, laundry, and central steam needs
Thanks to its multi-fuel design, it offers the ability to minimize operating costs by switching between solid, liquid, or gaseous fuels when fuel prices fluctuate.
Companies we have delivered this boiler to
- Üstün KardeşlerKonya · 12 t/h, 8 bar
- Sampor StyroporSamsun · 3.5 t/h, 8 bar
Frequently Asked Questions
A hybrid boiler is a steam boiler that combines a Scotch-type three-pass shell at the top with a water-tube radiant section at the bottom. It offers the large water volume of the Scotch type and the fast steam generation of the water-tube design in a single shell.
With its rotary-grate system it burns coal and biomass; it can run on solid, liquid or gaseous fuel.
Our hybrid boiler operates at a thermal efficiency above 90%.
It is suitable for food, textile and energy plants that want fuel flexibility and need both stable steam pressure and fast steam generation.
Hybrid Water-Tube Rotary-Grate Steam Boiler — let’s size it together
Our engineers plan capacity, pressure and fuel choice for your needs.