CN103614939B

CN103614939B - Rice wheat straw cold soaking floats interlock system sizing process method

Info

Publication number: CN103614939B
Application number: CN201310622465.6A
Authority: CN
Inventors: 李文海
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-30
Filing date: 2013-11-30
Publication date: 2016-05-25
Anticipated expiration: 2033-11-30
Also published as: CN103614939A

Abstract

The rice wheat straw cold soaking that patent application of the present invention provides floats interlock system sizing process method, adopt caustic soda, sulfonate and the water-soluble mixed chemical liquid room temperature environment cold soaking rice wheat straw raw material pulping process of at least 4 hours of hydrogen peroxide, described chemical liquid is the total weight percent by admixing medical solutions, caustic soda is 5～10%, sulfonate is 1～2%, hydrogen peroxide 10～12%, wherein water consumption be oven dry weight part 10-12 doubly. The technical program has shortened pulping process flow greatly, removes the constraint of lignin to fiber in cold soaking, makes fully to be softened and pulping in fiber impregnation, is a kind of high production, high-quality, low cost, environment is affine good pulping process.

Description

Rice wheat straw cold soaking floats interlock system sizing process method

Technical field

What patent application of the present invention related to is that grass family cane is the pulping process method that the pulping process method of pulping raw material, especially rice wheat straw cane are pulping raw material.

Background technology

Slurry that paper-making pulping the obtains overwhelming majority is copy paper production and application, but along with the development of technology, the user demand of packing articles, filling goods is also more and more, more and more extensive.

By today, paper-making pulping industry faces three large pressure: environmental protection pressure, pulping raw material pressure in short supply and process costs pressure. Existing paper-making pulping process method is still continued to use comparatively traditional chemical pulping method, especially the pulping process taking rice wheat straw as raw material, comprise that alkali steams pulp-making method and sulfate pulping, wherein main high alkali charge and the thermophilic digestion technological means of adopting, by strong chemical reaction dissolved lignin, and adopt this manufacturing process can make bleachable pulp, but the pressure that this process is expensive and high pollution brings is very large, and fiber is had to very major injury, yield rate also lower, pulping intensity is poor. Particularly in the situation that wood raw material is very in short supply, people's sight more turns to the grass family canes such as abundant, the inexpensive rice wheat straw of raw material sources, but be proven, due to rice wheat straw self-characteristic, apply existing pulping process and process rice wheat straw raw material, above-mentioned technical problem will be more serious. Along with the development of technology, half chemical mechanical slurry systeming process and mechanical pulping process are there is, but these processes generally need high-temperature process, although some of them process is not used additional pyroprocess, technical scheme as disclosed in Chinese patent CN101718049A is to utilize the high temperature that grinds middle generation of two mills of straw disassembler to carry out lignin degrading. Still there is suitable sewage discharge, the technical problem of contaminated environment in them, its pulping process can not get bleachable pulp; In addition, the slurry pulping intensity difference that it obtains, only can be applicable to corrugated paper, spool fiber board production.

Also there is long, the complicated technical problem of pulping process flow in existing pulping process technology.

Summary of the invention

The goal of the invention of patent application of the present invention is to avoid using high temperature, high alkali number technological means, provides a kind of without sewage discharge pressure, cost is low and pulping intensity is desirable rice wheat straw cold soaking to float interlock system sizing process method. the rice wheat straw cold soaking that patent application of the present invention provides floats interlock system sizing process method and technology scheme, its main technical content is: a kind of rice wheat straw cold soaking floats interlock system sizing process method, its method is: after purifying, rice wheat straw is immersed in chemical liquid, in room temperature environment cold soaking at least 4 hours, thereafter, rice wheat straw after cleaning and dipping, through grinding of routine, slagging-off, obtain slurry by screening, chemical liquid is wherein caustic soda, the admixing medical solutions that sulfonate and hydrogen peroxide are water-soluble, by the total weight percent of admixing medical solutions, caustic soda is 5～10%, sulfonate is 1～2%, hydrogen peroxide 10～12%, wherein water consumption be over dry rice wheat straw raw material weight portion 10-12 doubly.

In above-mentioned overall technical architecture, described sulfonate be in xylenesulfonate, lignosulfonates or 12 alkylbenzenesulfonates one of.

In above-mentioned overall technical architecture, in room temperature environment, by rice wheat straw raw material cold soaking 4～6 hours, make finished product slurry through conventional postorder flow process.

In above-mentioned overall technical architecture, in room temperature environment, by rice wheat straw raw material cold soaking 18～20 hours, make bleaching slurry.

The rice wheat straw cold soaking that patent application of the present invention provides floats interlock system sizing process method and technology scheme, under room temperature environment, complete the cold soaking of raw material simultaneously, the cold process of floating, greatly shorten pulping process flow, also avoid using high alkali number, the technological means of high temperature, experimental results show that, composition caustic soda in chemical liquid, sulfonate and hydrogen peroxide have played synergy, the effect that its cold soaking is cold to be floated relaxes and strong, in cold soaking, remove the constraint of lignin to fiber, make fully to be softened and pulping in fiber impregnation, and the lignin of being loosened is retained in the slurry obtaining mostly, yield rate is high, because the processing means of this process make fiber not suffer chemical depletion, fiber is carefully grown in slurry, be curling shape voluntarily, resilience is good, after long-time extruding, elasticity does not subtract, gas permeability and good hygroscopicity, pulping intensity improves, its pulping fracture length reaches 5.0Km, be equivalent to the intensity of wood pulp brown paper. in cold soaking, hydrogen peroxide makes the chromophoric group oxidative decoloration of lignin, the experiment proved that, it is pure white that cold soaking made slurry after 18～20 hours, and becoming pulp brightness is 60～70%, and its white is stable, prolonged not brightness reversion, the slurry obtaining after cold soaking 4-6 hour is suitable for the desirable feedstock of producing highly intensified corrugated paper, elastic bed mattress, cushion or pillow etc. composition in described admixing medical solutions acts synergistically jointly, and only adopts one or both compositions wherein mutually to arrange in pairs or groups, and all cannot realize and in low temperature, especially room temperature environment, realize the cold effect of floating of cold soaking. the technical program has the technological merit that yield rate is high, pulping intensity is high, process costs is low, particularly due to cellulose in waste liquid and lignin degradation product very few, it becomes pulp waste as clear as crystal, present light orange, can in technological process, use by iterative cycles, so the environmental protection pressure of without sewage discharge is a kind of high production, high-quality, low cost, environment is affine good pulping process.

Detailed description of the invention

Embodiment 1

This rice wheat straw cold soaking floats interlock system sizing process method: splendid attire chemical liquid in pond, press doubly part note of oven dry weight, a weight portion rice wheat straw after purifying is immersed in chemical liquid, cold soaking 4～6 hours in room temperature environment, take out clean thereafter, rice wheat straw after soaking, through the grinding, clean, remove the gred, screen of routine, is made to slurry. Chemical liquid is wherein the water-soluble admixing medical solutions of caustic soda, sulfonate and hydrogen peroxide, by the total weight percent of admixing medical solutions, caustic soda is 5～10%, sulfonate is 1～2%, hydrogen peroxide 10～12%, wherein the consumption of water be over dry rice wheat straw raw material weight portion 10-12 doubly, and the pH value of chemical liquid is not less than 12. When each drug dosage is upper prescribing a time limit, its cold soaking time removes the limit, otherwise, when each drug dosage is lower prescribing a time limit, its cold soaking time capping. The finished product slurry obtaining is suitable for producing the products such as highly intensified corrugated paper, cardboard and elastic bed mattress, cushion and pillow, and its pulping fracture length improves, and reaches 5.0Km, is equivalent to the intensity of wood pulp brown paper. Wherein said sulfonate be in xylenesulfonate, lignosulfonates or 12 alkylbenzenesulfonates one of. It soaks rear liquid and cleans waste liquid limpid, transparent, is light orange, can recycle.

Embodiment 2

This rice wheat straw cold soaking floats interlock system sizing process method: splendid attire chemical liquid in pond, press doubly part note of oven dry weight, a weight portion rice wheat straw after purifying is immersed in chemical liquid, cold soaking 18～20 hours in room temperature environment, take out clean thereafter, rice wheat straw after soaking, through the grinding, clean, remove the gred, screen of routine, is made to bleaching slurry. Chemical liquid is wherein the water-soluble admixing medical solutions of caustic soda, sulfonate and hydrogen peroxide, by the total weight percent of admixing medical solutions, caustic soda is 5～10%, sulfonate is 1～2%, hydrogen peroxide 10～12%, wherein the consumption of water be over dry rice wheat straw raw material weight portion 10-12 doubly, and the pH value of chemical liquid is not less than 12. When each drug dosage is upper prescribing a time limit, its cold soaking time removes the limit, otherwise, when each drug dosage is lower prescribing a time limit, its cold soaking time capping. The finished product slurry pulping fracture length obtaining improves, and reaches 5.0Km, is equivalent to the intensity of wood pulp brown paper, and one-tenth pulp brightness is 60-70%, and whiteness is stable, prolonged not brightness reversion. Wherein said sulfonate be in xylenesulfonate, lignosulfonates or 12 alkylbenzenesulfonates one of. It soaks rear liquid and cleans waste liquid limpid, transparent, is light orange, can recycle.

Claims

1. a rice wheat straw cold soaking floats interlock system sizing process method, it is characterized in that the method is: after purifying, rice wheat straw is immersed in chemical liquid, in room temperature environment cold soaking at least 4 hours, thereafter, rice wheat straw after cleaning and dipping, through grinding of routine, slagging-off, obtain slurry by screening, chemical liquid is wherein caustic soda, the admixing medical solutions that sulfonate and hydrogen peroxide are water-soluble, by the total weight percent of admixing medical solutions, caustic soda is 5～10%, sulfonate is 1～2%, hydrogen peroxide 10～12%, wherein water consumption be over dry rice wheat straw raw material weight portion 10-12 doubly, described sulfonate is xylenesulfonate, one of in lignosulfonates or 12 alkylbenzenesulfonates.

2. rice wheat straw cold soaking according to claim 1 floats interlock system sizing process method, it is characterized in that described sulfonate is xylenesulfonate.

3. rice wheat straw cold soaking according to claim 1 and 2 floats interlock system sizing process method, it is characterized in that, by rice wheat straw raw material cold soaking 4～6 hours, making finished product slurry through conventional postorder flow process.

4. rice wheat straw cold soaking according to claim 1 and 2 floats interlock system sizing process method, it is characterized in that, by rice wheat straw raw material cold soaking 18～20 hours, making bleaching slurry.