Final answer:
In the chemical pulping process, lignin is removed from chipped wood in the digester, a device where wood chips are treated with chemicals to dissolve lignin.
Step-by-step explanation:
In the chemical pulping process, lignin is removed from chipped wood in the digester. The digester is where the wood chips are treated with chemicals that dissolve the lignin, which binds the cellulose fibers together. This process is critical for producing pulp that can be used to make paper. While the recovery boiler is used to recover chemicals used in the process and produce steam, the blow tank is where the pulp is discharged after cooking, and the hogger is a machine that cuts or grinds irregular edges of waste paper.