Water-tube steam boiler
Low-water-content boiler that raises steam in 10–15 minutes: up to 80 000 kg/h of steam at up to 160 bar
TSB Energy
- ≤ 80 000 kg/h
- ≤ 160 bar
- Efficiency ≥ 95 %
In a water-tube steam boiler, water circulates through tubes between a lower drum and an upper steam drum, while the flame and flue gas heat these tubes from outside. Because little water is held under pressure, the boiler starts producing steam within 10–15 minutes and its standby heat losses are far lower than those of conventional steam boilers. TSB Energy builds these boilers for up to 80 000 kg/h of steam (up to 56 000 kW) and up to 160 bar; they can fire natural gas, LPG, LNG, biogas, diesel and heavy fuel oil, as well as up to 100 % hydrogen with a suitable burner.
In the D-type design, the furnace consists of fully water-cooled membrane walls, with welded front and rear walls and no refractory lining, which lowers annual maintenance costs. Fitted with a superheater, the D-type boiler can supply superheated steam at up to 565 °C (1050 °F). Efficiency exceeds 95 % without any additional heat recovery system. With clean combustion, NOx remains below 70 mg/Nm³ on gas and below 150 mg/Nm³ on oil, and configurations with NOx below 5 ppm and very low CO are also offered.
Design and manufacture are based on EN 12952, PED 2014/68/EU, TRD and ASME VIII Div. 1. The boiler suits indoor and outdoor installation, and operating modes range from continuous local supervision to up to 72 hours without attendance. A PLC watches the safety devices and the boiler is operated from an HMI; for remote monitoring, a PLC with Modbus, Modbus TCP and Profinet can link it to an existing SCADA system. Feedwater must be very well treated.
Water-tube steam boiler
- Efficiency above 95 % without additional heat recovery
- Small water content under pressure: safer operation and low standby losses
- Refractory-free, fully water-cooled, gas-tight furnace walls
- Steam available within 10–15 minutes
- Suitable for indoor and outdoor installation
- Automatic, safe operation with successive safety systems
- CO₂ emissions can be cut by firing up to 100 % hydrogen with a suitable burner
- A self-explanatory menu makes statutory inspections easier
Water-tube steam boiler
Two-drum design
An upper steam drum and a lower feedwater (mud) drum are linked by water tubes. Heated water rises to the steam drum while cooler water descends through separate tubes, and saturated steam is taken from the top of the drum. On its way back to the lower drum, the cooler water leaving the steam drum warms the incoming feedwater.
Superheater and economiser section
Added according to the steam quality required: saturated steam is led through a superheater placed in the flue gas path, raising its temperature, and in the D-type design superheated steam can reach up to 565 °C (1050 °F). Flue gas heat is also used to preheat the combustion air and the feedwater.
Key specifications
| Specification | Water Tube Steam Boiler |
|---|---|
| Steam output | ≤ 80 000 kg/h |
| Thermal capacity | ≤ 56 000 kW |
| Operating pressure | ≤ 160 bar |
| Operating temperature | ≤ 565 °C (superheated steam, D-type design with superheater) |
| Time to steam | 10–15 min |
| Efficiency | ≥ 95 % (without additional heat recovery) |
| Fuel types | Natural gas, LPG, LNG, biogas, diesel, heavy fuel oil, H₂ (up to 100 % with a suitable burner) |
| Unattended operation | ≤ 72 h |
| Design | D type; fully water-cooled membrane-wall furnace, no refractory |
| NOx emissions | Clean combustion: < 70 mg/Nm³ (gas firing) · < 150 mg/Nm³ (oil firing) |
Approvals and standards
- EN 12952 — water-tube boilers (design and manufacture)
- PED 2014/68/EU — Pressure Equipment Directive (design and manufacture)
- TRD — German technical rules for steam boilers
- ASME VIII Div. 1 — pressure vessels (design and manufacture)
Accessories
- Water treatment systems and water analysis
- Feedwater tank and further thermal storage tanks
- Condensing economiser
- O₂ and CO trim control
- Firing options for two fuels or fuel mixtures
- SCADA integration via a PLC supporting Modbus, Modbus TCP and Profinet
More products in this group
Three-pass steam boiler
Scotch-type fire-tube boiler for industry: up to 30 000 kg/h of steam at pressures up to 25 bar
- ≤ 30 000 kg/h
- ≤ 21 000 kW
- ≤ 25 bar
Mobile steam boiler room
Complete steam boiler house in a 20 ft or 40 ft ISO container, factory-tested and ready to connect
- ≤ 6000 kg/h
- ≤ 16 bar
- ISO 20 ft / 40 ft
Liquid and gas-fired thermal oil heater
Forced-circulation coil heater that brings thermal oil up to 420 °C in a closed loop (special equipment above 300 °C)
- ≤ 420 °C (special equipment > 300 °C)
- ≤ 12 000 kW
- ≤ 25 bar
SWB superheated water boiler
Three-pass pressurised hot water boiler that keeps water liquid above its boiling point in a closed circuit
- ≤ 10 000 000 kcal/h
- ≤ 12 bar
- Efficiency 93–94 %
Let's choose the right product for your project together
Tell us about your plant and what you need, and our engineers will recommend the right solution.