Mobile Steam Unit Sone 2
Safety functions for explosive zones
Halvorsen Mobile Steam Unit Zone 2 is designed for customers who require steam for shorter or longer periods of time.The system is flexible and can meet a full range of customer requirements, for both industrial land-based projects and offshore installations.
The safety functions are fully integrated so that the unit can be placed in areas where there is a risk of explosive gases (Z-015). The entire unit is assembled in a container approved for offshore transportation (DnV 2.7.1).
RegulationsThe boiler is designed in accordance with the following specifications and regulations:
The Halvorsen Mobile Steam Unit Zone 2 is based on a system whereby a traditional fuel gas boiler together with extra equipment is fitted in a 20-foot container offshore.
In order to meet the requirement for utilisation in areas exposed to gas, the container is equipped with relief ventilation where air is provided from a safe area. The necessary gas and overpressure detectors which automatically shut down the unit are also installed, along with manual and automatic fire extinguishing equipment.
The boiler installed in the container is a traditional gas fuel boiler with a large water volume and flash gas surface. This provides good steam quality and stable steam pressure, even with heavy loads. Due to the large volumes of water, a high volume of energy is stored in the boiler, which can provide continuous capacity for short periods of time without any significant loss in pressure.
Another advantage provided by this design is that when the boiler is operating as standby, it provides an immediate supply of steam at specific pressure and temperature:
Burning and combustion system
Diesel day tankVolume: 800 litres
Feed water systemThe steam unit is supplied with a complete feed water system comprising:
Control panel for the steam unitA control panel is fitted to the wall of the steam unit.
- Alarm functions:
- High water level, boiler
- Low water level, boiler
- High pressure, boiler
- High temperature, exhaust
- Low water level, feed tank
- Low oil level, feed tank
- After shut-down functions:
- Lowest water level, boiler
- Highest pressure, boiler
- Highest temperature, exhaust
- Discharger for:
- Feed pumps
- Ventilation fan