Wood pulp refers to the pulp that is made from wood. Wood is a common material for paper pulp production like straw, reed, jute and etc. As the most widely-used pulp, wood pulp takes 90% share of all paper pulp output. According to the pulp processing, the wood pulp can be classified into sulfate softwood pulp, mechanical wood pulp (also called groundwood pulp) and fined wood pulp. Softwood pulp and hardwood pulp are two different types of wood pulp, they have the difference in fiber.
For a complete wood pulp production, some equipment is required in the wood pulp process including material-preparation machine and pulping machine.
The material-preparing machine is applied before pulp cooking or defibrination; they are used to pre-process and process by the processing requirement. There are non-wood fiber preparing machines and wood fiber preparing machines, such as hay cutter, reed cutter, depithing machine for sugarcane, peeling machine and chipping machine. The chipping machine is typical equipment for wood pre-processing.
As we all know, common paper pulping include chemical pulping, mechanical pulping and chemi-mechanical pulping. We take chemical pulping as the example. Wood pulp production needs pulp digester, blow tank, vacuum drum washer, twin roll press, disc filter and other custom paper pulping machines.
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Wood pulp process can be summed up into these steps: materials preparing, pulp cooking, pulp washing, pulp bleaching, and other treatments.