PRC-APMP (preconditioning refiner chemical-alkaline peroxide mechanical pulp) pulping method for salicacea bamboo

Abstract

The invention discloses a PRC-APMP (preconditioning refiner chemical-alkaline peroxide mechanical pulp) pulping method for salicacea bamboo. The alicacea bamboo is adopted as a fiber raw material. Themethod comprises the following steps: putting first-stage extruded wood pieces into a first-stage preimpregnator, adding a first-stage preimpregnation liquid, performing second-stage extrusion and defibering, performing second-stage chemical liquid preimpregnation, performing high-concentration pulping by using a first-stage disc mill, performing cyclone separation, performing cooling by using acooling helix, performing high-concentration bleaching, performing dehydration by using a dehydration squeezing machine, performing second-stage high-concentration pulping, performing cyclone separation, performing latency elimination, performing double-disc pulping, performing pressurized screening, and performing multi-disc concentration, so as to obtain finished product pulp. By adopting the PRC-APMP pulping method for the salicacea bamboo, raw material resources of chemithermomechanical pulping are effectively widened, according to property differences of the salicacea bamboo and poplar wood, pulping process procedures are optimized, the pulping cost is low, the pulping quality is good, and the method has the benefits of wood resource conservation and environment protection.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a PRC-APMP pulping method of bamboo willow. Background technique [0002] At present, the raw materials for PRC-APMP pulping are mainly poplar wood chips, and the types of materials used are relatively single. Due to the good processing performance of poplar wood, it has become the most consumed log material in my country's panel industry. The procurement of poplar wood fiber raw materials is a comprehensive competition within and between industries. At present, poplar wood raw materials are difficult to meet the supply demand. Bamboo willow is a multi-variety hybrid fast-growing new tree species jointly researched and cultivated by California Agricultural University and several large paper and seedling companies. It has begun to be planted on a large scale in my country. This tree species has the characteristics of fine wood structure, high natural whiteness, soft fiber, hi...

AI Technical Summary

Problems solved by technology

This tree species has the characteristics of fine wood structure, high natural whiteness, soft fiber, high calorific value, etc., and has the potential excellent quality of wood for pulping and papermaking, but it has not been used in the papermaking industry to produce chemical pulp.