Black Liquor Recovery Boiler
Safety Applications for the Pulp & Paper Industry
In the paper and pulp industries, black liquor recovery boilers are used to burn the black liquor from the processing plant to provide additional steam and to recover sodium salt from the liquor. If conducted improperly, this process could result in a reaction between water and sodium salt, low solid liquors, or the uncontrolled ignition of unburned fuel and gases which could cause a furnace explosion. Due to the complexity and high risks of this process, careful control of the operations are required to ensure safety.
To minimize the possibility of an explosion, the control of the black liquor injection guns and the flow of the black liquor through the indirect liquor heater or washout procedures are synchronized by using KIRK® trapped key interlocks.