How to distinguish between straw pulp and wood pulp

　　A kind of straw pulp. Using grasses as raw materials, it is made by caustic soda method, sulfate method, neutral sulfite method or chloride method. Generally contain more hemicellulose, easy to beating and sizing. However, each grass species has significant differences. For example, rice straw pulp has short fibers, many miscellaneous cells, poor filterability, large stretch rate of paper, brittle texture, and low tearing degree; the fiber length and filterability of straw pulp are relatively low. The rice straw pulp is good, the paper is firmer, and the transparency is higher; the altar grass pulp is clean and tough, the fiber is slender, has superior interweaving power, the paper is fine and smooth, and the mechanical strength is good. Bleached altar pulp and other straw pulps in the net processing process can be used to make various medium and high-grade writing papers and typing papers. General straw pulp can be mixed with other pulps to make cultural paper, and unbleached straw pulp is used to make packaging paper and cardboard.

　　Pulping equipment is the equipment used in the process of separating plant raw materials into fibers. Pulping methods can be divided into chemical, mechanical and chemical-mechanical methods. The corresponding pulping equipment includes digesters, wood grinders, heat mills, pulp washing machines, bleaching machines, beaters, and waste liquid recovery equipment.

　　After the wood chips are preheated by steam, the slurry that is ground under high pressure is called hot wood chip ground wood pulp. The machine that makes hot wood chip ground wood pulp is the heat mill. The heat mill consumes a lot of power, so it is sufficient Utilizing the heat energy in the refining process is the key issue of the thermal mill; the pulp washing machine is a mechanical equipment that separates the cooked pulp from the black liquor. According to the black liquor extraction rate, there are two categories: high concentration and low concentration extraction.