Method for producing and bleaching slasher sizing with oil windmill palm empty fruit fibre

Abstract

The invention discloses a method for using oil palm hollow fruit fibers for the production of bleaching machine pulp, comprising: step 1, subjecting the oil palm hollow fruit fiber raw material to water scrubbing to remove oil stains, sands and dusts; step 2, adding a penetrant for pre-penetration treatment; step 3, extruding and dehydrating by a polishing splitting machine and pressing to filaments to then feed into a first thermofiner for rough grinding so that the fibers are split into coarse pulp; step 4, watering to dilute the coarse pulp roughly-grinded by the thermofiner in order to sieve out the coarse pulp and screened pulp which are extruded and filtered, respectively; step 5, Introducing the sieved coarse pulp into a second thermofiner for continuous thermal grinding, and mixing the grinded size with the screen pulp by a pulp screen in the fourth step; step 6, watering to dilute the grinded size followed by screening via a screen net, delivering the coarse pulp to the second thermofiner for regrinding, concentrating the screened pulp to prepare for bleaching; step 7, employing a high-concentration high-temperature chlorine-free hydrogen peroxide bleaching method to reach 75%-80%ISO of the whiteness of the bleached pulp, and obtaining the bleaching machine pulp via washing, filter-pressing and drying for the papermaking.

Description

technical field

[0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for producing bleached mechanical pulp by using oil palm empty fruit fiber. Background technique

[0002] Oil palm fiber mainly comes from the trunk, leaf sheath, empty fruit channel and hollow bark raw materials. The cellulose content in the oil palm fiber raw material is as high as 85%, the lignin content is about 18%, and the ash content is low. High-quality raw materials for papermaking are mostly produced in Southeast Asia. The 2008 Malaysian palm tree harvest was bumper. With good weather and high production, Malaysia's palm oil output may reach a record 17.5 million tons this year, higher than the previous year's 15.8 million tons. According to statistics, there are more than 12 million tons of empty fruit fiber raw materials in Malaysia every year. Except for a small amount of fiberboard production or handicrafts, most of them are la...