Pulp cooking refers to the process of pulping that put the papermaking raw material and the cooking liquor into the digester and then heat by steam to remove the non-cellulose part of the fibre material. Papermaking boiled black liquor with a high calorific value and good flammability is important self-produced energy of the paper industry. Grano's products can be used as a series of key energy-saving equipment in the black liquor enrichment process, which is an important measure to improve the energy utilization and environmental protection of paper mills.