CN1287197A - Technological process of producing poplar fluff pulp - Google Patents

Abstract

Sliced poplar is treated through water washing in washing machine, dewatering, preheating, high temperature digestion in water solution of sodium sulfite and water solution of sodium hydroxide inside a digestion pipe, storing in buffering tower and pulp grinding in a pulp grinding machine to obtain poplar pulp. Poplar pulp is sieved, washed to eliminate dregs, further washed in pretreating tower, first bleached for a certain period in the mixed solution of hydrogen peroxide, sodium hydroxide, sodium silicate and magnesium sulfate in a middle bleaching tower, and finally re-bleached in a high bleaching tower to produce poplar fluff pulp.

Description

Use technological process of producing poplar fluff pulp

The present invention relates to use the technological process of producing poplar fluff pulp technical field.

At present make the stuffing that the raw material production Time of Fluff Slurry is used for sanitary napkin with pine abroad,,, the sanitary napkin cost of making is increased so the Time of Fluff Slurry cost is higher because the high pulping process yield of pine price is low; Because domestic protecting forest resources, the Time of Fluff Slurry made with pine from external import of also having to, and willow does not almost have industrial utilization as the quick growing species of trees and is worth, and does not have bibliographical information at home and abroad with its system Time of Fluff Slurry.

The objective of the invention is the invention technological process of producing poplar fluff pulp, poplar do raw material by chip, operation such as washing, boiling, defibrination and bleaching makes Time of Fluff Slurry, it makes the Time of Fluff Slurry price of making very low with uncommercial poplar almost as raw material.

The present invention is achieved in that the poplar that processes is chipped, by conveyer and cyclone separator wood chip is sent into chip bin, wood chip is sent to the rinsing machine washing by conveyer from chip bin, then it is dewatered with spiral dewater, wood chip after the dehydration advances pre-hot aggregate bin, advance the boiling pipe again, wood chip sodium sulfite aqueous solution and sodium hydrate aqueous solution boiling certain hour at high temperature in the boiling pipe, send into paste mill grinding again after it being sent into tempering tower then, wood pulp is sent into stock tank after screening, pretreater is sent in wood pulp washing and slagging-off again, wash again through it and to float tower in delivering to, in float wood pulp aqueous hydrogen peroxide solution in the tower, sodium hydrate aqueous solution, the mixed liquor insulation certain hour of sodium silicate aqueous solution and magnesium sulfate is bleached, the wood pulp of bleaching is sent into height again float tower and bleach again, make Time of Fluff Slurry.

Advantage of the present invention is: this process is simple; fluff pulp fibers flexibility and the bulkiness made are good; absorbency and full fluidity can be good; the finished product whiteness is higher; it is that the Application and Development of quick growth poplar wood provides new approach that this technology is made raw material with poplar; this process synthesis yield height, energy consumption is low, nontoxic, harmless and pollution-freely be convenient to carry out sewage disposal protection environment.

Below in conjunction with embodiment, the present invention will be further described:

Joint is removed in the poplar hand peeling, sawed-off and splitting, the screening of peeling is then sent wood chip into chip bin by conveyer and cyclone separator, wood chip is sent to the rinsing machine washing by conveyer from chip bin, then it is dewatered with spiral dewater, wood chip after the dehydration advances pre-hot aggregate bin, advance the boiling pipe again, wood chip is with containing 5% sodium sulfite aqueous solution and containing the boiling 15 minutes under 160 ℃ temperature of 2.5% sodium hydrate aqueous solution in the boiling pipe, send into paste mill grinding again after it being sent into tempering tower then, wood pulp is sent into stock tank after screening, pretreater is sent in wood pulp washing and slagging-off again, wash again through it and to float tower in delivering to, in float wood pulp in the tower with the hydrogen peroxide that contains 2.5%, 2% NaOH, 4% sodium metasilicate and 0.5% magnesium sulfate solution mixed liquor were bleached 1.5 hours under 60 ℃ temperature, the wood pulp of bleaching is sent into height again float tower, wood pulp is used and is contained 3% hydrogen peroxide in height floats tower, 2% NaOH, 5% sodium metasilicate and 0.5% magnesium sulfate solution mixed liquor were bleached 2.5 hours under 60 ℃ temperature, made Time of Fluff Slurry.

Claims (1)

1. Use technological process of producing poplar fluff pulp, it is characterized in that: the poplar that processes is chipped, by conveyer and cyclone separator wood chip is sent into chip bin, wood chip is sent to the rinsing machine washing by conveyer from chip bin, then it is dewatered with spiral dewater, wood chip after the dehydration advances pre-hot aggregate bin, advance the boiling pipe again, wood chip sodium sulfite aqueous solution and sodium hydrate aqueous solution boiling certain hour at high temperature in the boiling pipe, send into paste mill grinding again after it being sent into tempering tower then, wood pulp is sent into stock tank after screening, pretreater is sent in wood pulp washing and slagging-off again, wash again through it and to float tower in delivering to, in float wood pulp aqueous hydrogen peroxide solution in the tower, sodium hydrate aqueous solution, the mixed liquor insulation certain hour of sodium silicate aqueous solution and magnesium sulfate is bleached, the wood pulp of bleaching is sent into height again float tower and bleach again, make Time of Fluff Slurry.