The alkali recovery boiler in the paper industry feeds the waste liquid (black liquor) removed from the alkali paper washing process into the furnace as a concentrated fuel. After the black liquor is burned, it becomes liquid slag and is discharged from the bottom of the furnace. After caustic treatment, it is reduced to alkali; steam becomes secondary energy and is reused.Steam is reused as a secondary energy source.
1. The initial purpose of the alkali recovery boiler is to treat the waste liquid from the slurry cooking.
Pulp cooking waste liquid and recovery of cooking alkali, but the current alkali recovery boiler can be summarized as a three-point role: burning the organic matter in the black liquor to produce steam; generate green liquor for causticizing; reduce pollutant emissions, energy saving and environmental protection.
2. Paper mills use alkali recovery boiler, not only can recover the alkali used in papermaking (furnace body recovery rate of 99%), but also for heat and power generation, to achieve the comprehensive effect of recycling energy saving, reducing pollution.