What is pulp-paper making machinery

　　Pulp is processed from certain plants as raw materials, and it is the basic raw material for papermaking. Plants commonly used as raw materials for pulping can be divided into four categories: stem fibers [2], bast fibers, seed wool fibers and wood fibers. Among them, wood fiber is the most important. At present, my country's wood resources are far from meeting the needs of the growing pulp and paper industry. In order to make up for the shortage of raw materials, import from abroad every year

　　2. Pulping method

　　Pulping refers to the production process of using chemical methods, mechanical methods or a combination of the two to dissociate plant fiber raw materials into natural color or bleached pulp. See Figure 6-8-5.

　　→ Refining →

　　↑ ↓

　　Raw material storage → preparation → cooking → washing → screening → bleaching (or bleaching and refining)

　　↓ ↑

　　→ Steaming →

　　(Or dipping) and refining

　　Figure 6-8-5 Papermaking and pulping process

　　In addition to the above-mentioned basic processes, it also includes some auxiliary processes, such as the preparation of cooking liquor, the preparation of bleaching liquor, the recovery and utilization of chemicals and heat energy in cooking waste gas and waste liquor, and the comprehensive utilization of waste liquor.

　　3. Main importing countries and regions

　　The United States, Canada, Finland, Sweden, Norway, New Zealand, Chile and other countries and regions.