During the carbon black manufacturing process, aromatic oils undergo incomplete combustion. The controlled process results in the production of black and certain environmentally unfriendly gasses. Previously these gasses would be flared prior to being released to the atmosphere, however, a more effective solution has been implemented. These gasses, though unfriendly, have a high calorific value, making them a key factor in the success and sustainability of carbon black manufacturing units.
The energy in these waste gasses, can be harnessed and is done by combusting them in high pressure boilers, and utilising their thermal energy to generate steam which in turn generates electrical energy. The captive power system, makes the carbon black manufacturing units self sustainable in terms of power, and allow for any excess power to be given back to the grid.
At Ralson Carbon, 6MW of captive power are harnessed and excess is distributed.