Production process of high-strength corrugated base paper
Technical field
The invention belongs to pulp technology for making paper.
Background technology
At present, the enterprise that uses papermaking straw pulp in the paper industry is because of receiving the difficult and optimization of national papermaking industrial policy of pollution control, the restriction of adjustment, makes many papermaking straw pulps enterprise be in a dilemma ground.Utilization bio-pulping technology solves the direction that pollution problem has become many enterprises to fall over each other to develop; The biological pulp and paper making technology can realize the recycle of black liquor; The quality of production reaches the fluting medium of national B grade standard, is difficulty very but will make the quality of paper reach the excellent A grade standard of GB GB/T13023-2008.
The prior art close with the present invention name that to be the inventor declare on August 5th, 2005 is called the application for a patent for invention (application number: 200510044222.4) of " high slurry yield paper making process ".Paper making process that this patent application provides is in the black liquor utilization; The conserve water resource; Improve the rate aspect of winning a prize and obtained positive effect, but, also do not endure glue process and applying glue operation owing to do not rub the technical finesse of slurry and making beating in the process with the hands; The fluting medium of producing only can reach B grade standard product, can not solve the low problem of product specification.And have the black liquor difficult treatment, environmental pollution still, problem such as waste water resource produces height, and pulp yield is low.
Summary of the invention
For overcoming the deficiency of prior art, the present invention provides a kind of novel high-strength corrugated medium production technology, to solve the black liquor difficult treatment; Reduce environmental pollution, the conserve water resource reduces production costs; Improve pulp yield, produce excellent A level high-strength corrugated base paper with primary slurry.
The technical solution adopted for the present invention to solve the technical problems provides a kind of novel high-strength corrugated medium production technology, and this production technology comprises:
One, pulp preparation operation: raw materials such as wheat straw, straw, cotton stalk are carried out boiling, obtain the thick slurry of 75% left and right sides yield after the boiling.
Two, rub slurry process with the hands: slurry is gone into to starch in the well through helical feed and is washed, removes heavy seeds, and then through the solid-liquid separating machine dehydration, advances press master by helical feed and carry out black liquid extraction; Extract the slurry of accomplishing and send into the stranding pulp grinder by conveying worm again; In rubbing the slurry process with the hands, to guarantee the into slurry concentration of stranding pulp grinder >=30%, rub the pulp grinder current of electric with the hands and be controlled at 18A~22A, go out to rub with the hands the slurry beating degree >=18 ° SR of pulp grinder; Realize branch silk, the brooming of slurry; The water that solid-liquid separating machine is deviate from is pumped into recycle in the slurry well again, sends into the biological bacteria liquid pool by press master with the black liquor of rubbing the pulp grinder extraction with the hands and handles, and realizes the recycling of black liquor.
Three, making beating, machine hand's preface: the slurry that the stranding pulp grinder comes out generates qualified slurry through the processing of HC Cleaner, double disc refiner, tapered fiberizer, pressurized screen, decker, is pumped into paper machine and manufactures paper with pulp.
Four, endure glue process: at first in enduring the glue jar, add a certain amount of clear water and starch; And ceaselessly stir, add the load weighted glue masterbatch of enduring, stir; Next feeds steam; Be controlled at and be warmed up to 60-70 ℃ in 20-25 minute, continue to be warmed up to the 90-100 time to be controlled at 5-60 minute, use after 10-20 minute 95 ℃ of insulations at last.
Five, two-sided applying glue operation: the paper of manufacturing paper with pulp out carries out two-sided applying glue through indented form two-sided sizing applicator again, in the applying glue process, guarantees glue temperature>=65 ℃, and the control resin added is at 3~6g/m
2, guarantee bio-pulping straw paper success applying glue, produce excellent A level high-strength corrugated base paper.After page after the applying glue carries out drying, rewinding, become the qualified excellent A level high-strength corrugated base paper of finished product.
Adopt good effect of the present invention to be: to realize the black liquor recycle; Solved the difficult problem that multiple raw material such as utilizing wheat straw, cotton stalk, straw can't be produced excellent A level high-strength corrugated base paper; The conserve water resource; Reduce environmental pollution,, very real and long-range popularization, value are arranged for the non-wood fiber papermaking enterprise provides the successful experience of referential existence and sustainable development.
The specific embodiment
Producing excellent A level high-strength corrugated base paper with cotton haulm raw material is example, and this technology practical implementation operation is following:
1, pulp preparation operation: cotton haulm raw material is carried out boiling, and the cotton stalk that obtains 75% left and right sides yield after the boiling is slightly starched.
2. stranding slurry process: the thick slurry after the boiling is sent in the slurry well by conveying worm and is diluted, stirs; Reach and thoroughly separate the heavy seeds in the slurry with slurry; To guarantee to rub with the hands the normal use of pulp grinder, the slurry after the dilution utilizes solid-liquid separating machine to concentrate again, reaches the into concentration of press master; Concentrate the water that gets off and starch in the well with being pumped into again, accomplish recycle.Slurry is sent in the Double screw pulp extruder by conveying worm after concentrating through solid-liquid separating machine, carries out black liquid extraction, and black liquor is handled with being pumped in the biological bacteria liquid pool, and the black liquor after the processing returns the cooking process utilization.Handle with rubbing pulp grinder with the hands through the slurry after the black liquid extraction; In using stranding pulp grinder process, we have adjusted the slurry concentration and the grout absorption that advance to rub with the hands pulp grinder to the characteristic of bio-pulp; To guarantee the temperature control of slurry in rubbing pulp grinder with the hands; Thereby controlled the beating degree that to rub with the hands the pulp grinder slurry, made that slurry has obtained dividing silk, brooming in rubbing the slurry process with the hands, satisfied the requirement of further beating process; And in this process, also the black liquor in the slurry is further extracted, the black liquor that extracts also is admitted to the biological bacteria liquid pool and handles, and this also lays the foundation for alleviating middle section water processing load.
3, making beating, machine hand's preface: utilize conventional beating equipment to carry out defibrination, screening again, processing such as concentrate through rubbing slurry after pulp grinder is handled with the hands, just obtained qualified finished product slurry.We have carried out the transformation and the configuration of abrasive disc profile of tooth according to the characteristic of bio-pulp in the defibrination process, make the slurry that grinds satisfy the needs of copying paper fully.The finished product slurry has just become paper through paper machine making.
4, endure glue process: at first in enduring the glue jar, add a certain amount of clear water and starch; And ceaselessly stir, add the load weighted glue masterbatch of enduring, stir; Next feeds steam; Be controlled at and be warmed up to about 65 ℃ in 20-25 minute, continue to be warmed up to 95 ℃ (time was controlled at about 50 minutes), use after 15 minutes 95 ℃ of insulations at last.
5, two-sided applying glue operation: primary slurry is implemented the completely different of two-sided applying glue operation and waste paper; The main distinction is aspect the linear pressure of kiss-coating amount and applying glue temperature and sizing applicator; The paper of manufacturing paper with pulp out carries out two-sided applying glue through the two-sided sizing applicator of indented form again; Control applying glue temperature in the applying glue process>=65 ℃, resin added is at 5g/m
2, guarantee bio-pulping straw paper success applying glue, produce excellent A level high-strength corrugated base paper.After page after the applying glue carries out drying, rewinding, become the qualified excellent A level high-strength corrugated base paper of finished product.