CN102653930A

CN102653930A - Pollution-free pulping process for plant fibers

Info

Publication number: CN102653930A
Application number: CN2012101389075A
Authority: CN
Inventors: 侯俊民
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2012-09-05

Abstract

The invention relates to the field of paper making, and specifically relates to a pollution-free pulping process for plant fibers. The process comprises the steps of 1, weak-base cooking; 2, low-concentration milling; 3, shrinking; 4, smoldered bulking; 5, bleaching and pulp washing; 6, drying and sterilization; and 7, finished product obtaining. By using the process disclosed by the invention, the recycling of sewage can be realized; the process is low in energy consumption and low in material consumption; and because the steps of weak-base cooking and smoldered bulking are adopted, less lignin is produced.

Description

The string non-pollution pulping process

Technical field

The present invention relates to field of papermaking, be specifically related to the string non-pollution pulping process.

Background technology

Along with the progress of social civilization, the seriousness of pulping and paper-making environmental pollution is progressively recognized in the reach of science.Human increasingly high to the living environment quality requirement; Traditional pulping process is the incompatibility development of times; New cleaning pulping theory just can be arisen at the historic moment; And the generation of current cleaning pulping technology is the inevitable demand of modern society's civilization equally, and traditional pulping process is seriously polluted, high energy consumption, high material-consumption, low output.

Summary of the invention

The purpose of this invention is to provide the string non-pollution pulping process, realize recycling of sewage, low energy consumption, low material consumption, high production.

String non-pollution pulping process: 1, weak base boiling: will put into boiling vessel through the plant fiber material of mechanical pretreatment such as cut-out, screening, dedusting; Add weak base and silver-colored optical brightener simultaneously; Under 85 ℃ to 95 ℃ temperature, plant fiber material was carried out boiling two hours; Because less than under 100 ℃ the temperature and boiling under the condition of weak base, the amount that lignin produces is few; 2, low dense mill: the plant fiber material after decomposing is thick slurry, is extracted into fiberizer by stock pump and hangs down dense mill, realizes rubbing with the hands slurry; 3, shrink: the slurries behind the low dense mill get into hexagonal reel and shrink, and the aqueous alkali that produces that shrinks gets into the excessive pond of alkali lye through collecting, and disposed slurry squeezes out the alkali lye in the slurry again through the acroll press washer shove, and the liquid that shove produces gets into the excessive pond of alkali lye through collecting; 4, vexed ripe bulk: then sending into temperature to slurry is in 85 ℃ to 95 ℃ the thermostatic tank vexed ripe 3 to 8 hours, makes its slaking bulk; 5, bleaching pulp washing: and disposed slurry is sent into Bellmer through conveying worm and is bleached pulp washing; Slurry in the Bellmer is evacuated to hexagonal reel through stock pump and shrinks; Get into after the bleaching liquid that produces after shrinking is collected and loop back the receipts pond; Slurry after the bleaching gets into acroll press washer and further squeezes out the bleaching liquid in the slurry, and the bleaching liquid collection back that extruding produces gets into to loop back receives the pond; 6, oven dry sterilization: and disposed slurry gets into that dryer is dried and sterilization, 8, finished product: at last the finished product slurry.

The bleaching liquid pipeline is delivered to the excessive pond of alkali lye in the said circulation recovery pond, the liquid the excessive pond of alkali lye in through filtration and purified treatment direct reuse to boiling vessel.

This technology realizes recycling of sewage, low energy consumption, low material consumption, owing to adopt weak base boiling and vexed ripe bulk, the lignin of generation is few.

The specific embodiment

Embodiment 1

String non-pollution pulping process: 1, weak base boiling: will put into boiling vessel through the plant fiber material of mechanical pretreatment such as cut-out, screening, dedusting; Add weak base and silver-colored optical brightener simultaneously; Under 90 ℃ temperature, plant fiber material was carried out boiling two hours; Because less than under 100 ℃ the temperature and boiling under the condition of weak base, the amount that lignin produces is few; 2, low dense mill: the plant fiber material after decomposing is thick slurry, is extracted into fiberizer by stock pump and hangs down dense mill, realizes rubbing with the hands slurry; 3, shrink: the slurries behind the low dense mill get into hexagonal reel and shrink, and the aqueous alkali that produces that shrinks gets into the excessive pond of alkali lye through collecting, and disposed slurry squeezes out the alkali lye in the slurry again through the acroll press washer shove, and the liquid that shove produces gets into the excessive pond of alkali lye through collecting; 4, vexed ripe bulk: then sending into temperature to slurry is in 85 ℃ the thermostatic tank vexed ripe 8 hours, makes its slaking bulk; 5, bleaching pulp washing: and disposed slurry is sent into Bellmer through conveying worm and is bleached pulp washing; Slurry in the Bellmer is evacuated to hexagonal reel through stock pump and shrinks; Get into after the bleaching liquid that produces after shrinking is collected and loop back the receipts pond; Slurry after the bleaching gets into acroll press washer and further squeezes out the bleaching liquid in the slurry, and the bleaching liquid collection back that extruding produces gets into to loop back receives the pond; 6, oven dry sterilization: dryer is dried and sterilization and disposed slurry gets into; 7, finished product: get the finished product slurry at last.

Embodiment 2

String non-pollution pulping process: 1, weak base boiling: will put into boiling vessel through the plant fiber material of mechanical pretreatment such as cut-out, screening, dedusting; Add weak base and silver-colored optical brightener simultaneously; Under 95 ℃ temperature, plant fiber material was carried out boiling two hours; Because less than under 100 ℃ the temperature and boiling under the condition of weak base, the amount that lignin produces is few; 2, low dense mill: the plant fiber material after decomposing is thick slurry, is extracted into fiberizer by stock pump and hangs down dense mill, realizes rubbing with the hands slurry; 3, shrink: the slurries behind the low dense mill get into hexagonal reel and shrink, and the aqueous alkali that produces that shrinks gets into the excessive pond of alkali lye through collecting, and disposed slurry squeezes out the alkali lye in the slurry again through the acroll press washer shove, and the liquid that shove produces gets into the excessive pond of alkali lye through collecting; 4, vexed ripe bulk: then sending into temperature to slurry is in 90 ℃ the thermostatic tank vexed ripe 5 hours, makes its slaking bulk; 5, bleaching pulp washing: and disposed slurry is sent into Bellmer through conveying worm and is bleached pulp washing; Slurry in the Bellmer is evacuated to hexagonal reel through stock pump and shrinks; Get into after the bleaching liquid that produces after shrinking is collected and loop back the receipts pond; Slurry after the bleaching gets into acroll press washer and further squeezes out the bleaching liquid in the slurry, and the bleaching liquid collection back that extruding produces gets into to loop back receives the pond; 6, oven dry sterilization: dryer is dried and sterilization and disposed slurry gets into; 7, finished product: get the finished product slurry at last.

Claims

1. string non-pollution pulping process; It is characterized in that: 1, weak base boiling: will put into boiling vessel through the plant fiber material of mechanical pretreatment such as cut-out, screening, dedusting; Add weak base and silver-colored optical brightener simultaneously; Under 85 ℃ to 95 ℃ temperature, plant fiber material was carried out boiling two hours, because less than under 100 ℃ the temperature and boiling under the condition of weak base, the amount that lignin produces is few; 2, low dense mill: the plant fiber material after decomposing is thick slurry, is extracted into fiberizer by stock pump and hangs down dense mill, realizes rubbing with the hands slurry; 3, shrink: the slurries behind the low dense mill get into hexagonal reel and shrink; The aqueous alkali that produces that shrinks gets into the excessive pond of alkali lye through collecting; And disposed slurry squeezes out the alkali lye in the slurry again through the acroll press washer shove, and the liquid that shove produces gets into the excessive pond of alkali lye through collecting; 4, vexed ripe bulk: then sending into temperature to slurry is in 85 ℃ to 95 ℃ the thermostatic tank vexed ripe 3 to 8 hours, makes its slaking bulk; 5, bleaching pulp washing: and disposed slurry is sent into Bellmer through conveying worm and is bleached pulp washing; Slurry in the Bellmer is evacuated to hexagonal reel through stock pump and shrinks; The bleaching liquid collection back that produces after shrinking gets into and loops back the receipts pond, and the slurry after the bleaching gets into acroll press washer and further squeezes out the interior bleaching liquid of slurry, and the bleaching liquid collection back entering that extruding produces loops back receives the pond; 6, oven dry sterilization: and disposed slurry gets into that dryer is dried and sterilization, 7, finished product: at last the finished product slurry.

2. string non-pollution pulping process according to claim 1 is characterized in that: the bleaching liquid pipeline is delivered to the excessive pond of alkali lye in the said circulation recovery pond, the liquid the excessive pond of alkali lye in through filtration and purified treatment direct reuse to boiling vessel.