Staff members of the safety engineering department, Bilfinger GreyLogix foodtec GmbH
One innovative element is the carbon monoxide (CO) detection system “detex” for spray-drying, which has now been in use for three years, ensuring safe production of powdered milk. It monitors the spray dryers for any signs of glowing embers, which can cause an explosion in a worst-case scenario. Detex is fitted with a two-channel analysis module. The benefit of this is that absolute measurements can be recorded at any time in both the incoming and outgoing air channel. This helps to identify possible sources of disruptions outside the process and to minimize any unnecessary production downtimes caused as a result.
If it is necessary to shut down a system in an emergency and cool it down to a non-critical temperature zone, the “vertex” cooling system provides valuable assistance. This system prevents the supply air to the drying chamber from overheating and cools it on a controlled basis. It is based on the principle of evaporation cooling, which is achieved through the addition of a fine spray of water in the supply air channel of the drying chamber. The energy that is withdrawn from the hot air in this way reduces the temperature to a non-critical level without damaging the powder that is being dried.
Sometimes, an explosion or fire occurs despite every effort to prevent it. To provide the greatest possible protection, Bilfinger offers explosion protection systems and tailored fire extinguishing equipment.
Safety during work on the plant can also be increased very effectively. For this purpose, Bilfinger offers an innovative key transfer system for maintenance openings. This ensures that the openings remain locked until there is no further risk. Conversely, hazardous situations are avoided while access ways are open. To this end, each maintenance opening has a lock that can only be opened with a special key specifically matching the lock in question. During normal operations, this key is stored on a key board that has an electronically monitored slot for each individual key. When a key is removed, the plant is automatically blocked to prevent any unsafe operations and closed down on a controlled basis.