CN109423901A - A kind of technique that high-grade paper slurry is prepared as raw material using grass class plant - Google Patents
A kind of technique that high-grade paper slurry is prepared as raw material using grass class plant Download PDFInfo
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- CN109423901A CN109423901A CN201710764018.2A CN201710764018A CN109423901A CN 109423901 A CN109423901 A CN 109423901A CN 201710764018 A CN201710764018 A CN 201710764018A CN 109423901 A CN109423901 A CN 109423901A
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/006—Pulping cellulose-containing materials with compounds not otherwise provided for
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
Abstract
The invention discloses a kind of techniques that high-grade paper slurry is prepared using grass class plant as raw material, and the pulping process mainly includes the processing step that three tanks four squeeze a highly concentrated mill, which it is energy saving to improve prouctiveness；The black liquor of pulp making recycling and reusing generated in the technical process, the expressed water of especially 1, No. 2 press master recycles in the low-grade paper such as wrapping paper, 3, the expressed water of No. 4 press masters is as recycle-water in 1, No. 2 reactor tank, therefore realize whole process without discharge, reduce environmental pollution, improve raw material using effect, save the cost.By the processing step can be prepared high yield pulp1, low kappa number, low cost slurry.And the slurry not brightness reversion, no gas is tasteless, is better than full chemical pulp；The present invention is not limited by paper making raw material and scale simultaneously, particularly suitable for the distinctive grass pulping and paper-making in China.
Description
Technical field
The invention belongs to pulp technology for making paper, and in particular to a kind of to prepare high-grade paper slurry by raw material of grass class plant
Technique.
Background technique
Paper is closely bound up important item of living with people, has been developed as packaging, printing, cigarette, culture use
The raw material of the industries such as product, machinery, building materials, military project, paper industry are all widely used in all trades and professions, the hair of paper industry
Exhibition directly reflects the level of national a national economy and civilization construction.China is a paper grade (stock) paper big country, and papermaking has become
Drive the important basic industry of the national economic development.It is shown according to China's paper industry annual report in 2015, the whole nation in 2015
Paper and production enterprise about 2900, national paper and 107,100,000 tons of production amount, 103,520,000 tons of consumption figure, year disappears per capita
The amount of expense is 75kg, 79,840,000 tons of pulp production amount, 97,310,000 tons of paper pulp consumption, and the world paper product production and consumption Liang Junju the
One.
It is well known that the preparation of paper needs to consume a large amount of pulping raw material, and China is the country in the more fields in a Shaolin,
Afforestation rate only has 16.35%, and moreover, our plupwood utilization rates are also below world average level.According to the United Nations
Statistics, world's paper grade (stock) timber averagely account for the 7~8% of total amount, and advanced forestry is national, such as Finland, the U.S., Canada's papermaking
With the 32% of the total amount of wood of timber Zhan, and China is used for the 4% of the China timber Jin Zhan scalage of paper industry every year.But I
State is a large agricultural country, and according to statistics, the whole nation shares more than 1,800,000,000 mu of arable lands, and producing grain per year is more than 500,000,000 tons, the agricultural generated every year
More than 600,000,000 tons of stalk, non-wood-fiber is more than 700,000,000 tons, there is a large amount of agricultural wastes (such as cotton pavilion, sweet deer slag, wheat straw) every year
(such as bamboo, reed, awns stalk are for pulping and paper-making utilization with other miscellaneous gramineae plants.These grass class plants
Abundance, cheap, growth cycle is short, is one of the primary raw material of current China's paper industry.
Traditional paper technology is the main processing steps such as paper making raw material to be passed through to slurrying, modulated, manufactured paper with pulp, process, wherein
Slurrying is the first step and the most key step of papermaking, and the process of slurrying is exactly the lignin deviate from pulping raw material
Process；The subtractive process is broadly divided into chemical pulping method, mechanical pulping method and semichemical pulping method, and chemical pulping method is using most
For extensive production method, using chemical liquid in the device for being passed through 150 DEG C or more of high-temperature steam continuous boiling tablet,
So that the lignin in pulping raw material is reacted at high temperature with chemical reagent and produce the hydrotrope, with fiber separation at slurry；Change
Although length of schooling starches the natural length for remaining fiber, most lignin is eliminated, pulp yield is low, and pollution is big, and
During the cooking process, due to the addition of chemical agent, so that the slurrying being prepared has, a kind of niff, taste are bitter,
In subsequent water squeezing and washing process, a large amount of black liquor can be also generated.
Contain a large amount of suspended solid, organic pollutant and noxious material in black liquor, wherein there are about 30~35% nothings
Machine object, main ingredient are other sodium salts that sodium hydroxide, sodium carbonate, vulcanized sodium, sodium sulphate and organic matter combine；Also containing 65~
70% organic substance, main ingredient are lignin, resin, starch and low molecular compound etc., if by the black liquor direct emission
It will cause serious pollution into water body, such as the paper waste containing a large amount of fibers, pigment and inorganic salts can make water body blackening, and
There is special foul smell；The bod (BOD) of black liquid containing high concentration organic contaminant may be up to 5000~
40000g/L can largely consume the dissolved oxygen in water, influence water quality；A large amount of existing alkaline matters can make the pH of water body in black liquor
Value sharply increases, and destroys the balance of water body environment.
China's paper and board product are of less types at present, and only more than 600 kinds, be the half that developed country can produce paper kind,
And country's paper product technology content is lower, and second-rate, low-and-medium-grade products accounts for 60%, and middle-grade and expensive goods respectively account for
20%.With relevant industries technological progress and successive generations of products, existing paper product structure has been not suitable with the change of paper consumption market
Change.Chinese papermaking association relevant expert indicates, domestic paper and cardboard consumption structure from it is low and middle-grade to medium and high quality transformation be big
Gesture is become.To increase market effective supply, paper and board product should to be thinned, improve quality, improve grade, hair multi items in terms of
Exhibition.Wherein it is mostly important be exactly high-grade paper development and utilization, this kind of top grade paper mainly includes developing high-grade newsprint, top grade
Offset paper, high-grade information paper, high-grade office paper, luxury food medicinal paper, high-grade goods package paper and cardboard,
The products such as high grade coated paper and fine tissue.
Moreover, in order to obtain the slurrying of higher whiteness, a large amount of fluorescent brightening can be also added in pulping process
Agent will also result in serious influence to human health by the paper that the slurry added with fluorescent whitening agent is prepared.
Therefore, a kind of cleaning is developed, the pulping process of pollution-free, environmental protection and energy saving grass class plant has and important grinds
Study carefully meaning and application prospect.
Summary of the invention
In order to solve the deficiencies in the prior art, the object of the present invention is to provide one kind to prepare height by raw material of grass class plant
The technique of shelves paper slurry.
Object of the present invention is to what is be achieved through the following technical solutions:
A kind of technique that high-grade paper slurry is prepared as raw material using grass class plant comprising following steps:
1) grass class plant material is pre-processed, obtains pulping raw material, is stored in feed bin；
2) pulping raw material and the medicament mixing come out from feed bin, carries out first time sofening treatment；
3) first time water squeezing processing is carried out to the mixed material after the first time sofening treatment of step 2), obtains the first shove
Mixed material and the first shove water；
4) it is optionally added into water and/or recycle-water into the first shove mixed material of step 3), carries out second of water squeezing
Processing, obtains the second shove mixed material and the second shove water；
5) water and/or recycle-water are added into the second shove mixed material of step 4), carries out third time water squeezing processing, obtains
To third shove mixed material and third shove water；
6) the third shove mixed material and medicament of step 5) are mixed, carries out second of sofening treatment；
7) it is carried out after the mixed material after second of sofening treatment of step 6) being optionally added into alkali or sour its pH of adjusting
4th water squeezing processing, obtains the 4th shove material and the 4th shove water；
8) after the 4th shove mixed material of step 7) being optionally added into alkali or sour its pH of adjusting, bleaching agent is added and appoints
Selection of land clear water carries out highly concentrated mill defibrination, obtains grinding slurry；
9) grinding slurry that highly concentrated mill is discharged in step 8) is subjected to bleaching, obtains high-grade paper slurry.
According to the present invention, in step 1), the pretreatment of raw material includes removal of impurities dedusting, crushing, screening；
Wherein, the removal of impurities dedusting is the impurity and dust removed in raw material, and dedusting carries out preferably in dust-extraction unit, or
Person top in de-burring machine or storage bin is added horn-like dust-extraction unit, i.e., dedusting and crushing or storing feeding one into
Row；
The crushing is the section material that raw material is ground into 1-5 centimetres (preferably 2-3 centimetres), preferably in materials crusher into
Row；
The screening is to handle smashed fracture through sieving separating.
According to the present invention, in step 1), the raw material is selected from grass class plant, such as selected from reed, straw, bamboo
Piece, cotton stalk, wheat straw, corn stover, broomcorn straw etc..
According to the present invention, in step 2), the medicament includes water, sodium hydroxide and hydrogen peroxide, and water can be clear water
Or recycle-water or the two combine；The recycle-water can be third shove water and/or the 4th shove water in subsequent handling；Institute
Stating clear water can be at least one of tap water, industrial water that pH is 6.5~7.5 etc..
Preferably, the medicament is made of clear water and/or recycle-water, sodium hydroxide and hydrogen peroxide；
Preferably, the pulping raw material: clear water and/or recycle-water in medicament: sodium hydroxide: the mass ratio of hydrogen peroxide is
100:300-600:5-10:5-10, for example, 100:300:6.2:6.2.
According to the present invention, in step 2), the first time sofening treatment carries out in No. 1 reactor tank；
Wherein, the pulping raw material in the feed bin and medicament are sent into No. 1 reactor tank by screw rod feed way；
Wherein, each component in the medicament is mixed with pulping raw material simultaneously respectively；
Wherein, No. 1 reactor tank does not limit specifically, such as outer preferably with the insulation reaction tank of attemperator
Week has the reactor tank of insulating layer (such as rock wool layer)；Also preferably reaction of the top with watch window, periphery with rock wool layer
Tinning；The watch window is used to observe the softening degree of mixed material and the discharge quantity of observation charging in softening process, does
Wet degree, color etc.；The insulating layer of periphery setting is used to maintain the temperature in reactor tank, with ensure to react it is smooth into
Row.
It according to the present invention, can also include premix before the pretreated pulping raw material and medicament enter No. 1 reactor tank
The step of conjunction: pretreated pulping raw material and medicament are sent into agitating device by screw rod feed way and premixed
It closes, after mixing evenly, then will be in mixed material No. 1 reactor tank of feeding after premixing in such a way that screw rod feeds；
Wherein, the agitating device can be stirring pool；The time of the stirring is 1~10min.
According to the present invention, in step 2), the addition of medicament is so that the pH of the mixed material of No. 1 reactor tank is more than or equal to
12；
According to the present invention, in step 2), the pH that the mixed material of No. 1 reactor tank is discharged is 9-10；
According to the present invention, in step 2), the time of the first time sofening treatment is 70 minutes or more or more long, example
Such as 120min；
According to the present invention, in step 2), since the mistake of medicament after-tack self-formed from reaction heat and screw rod charging is added
When the heat of generation of rubbing in journey to start reaction, the temperature in No. 1 reactor tank can achieve 90-100 DEG C, or even to 100
DEG C or more；With the extension of softening time, the temperature of the insulation effect of reactor tank, No. 1 reactor tank is maintained at 70-90 DEG C；
Therefore softening reaction does not need injection steam or other additional heating methods.
According to the present invention, in step 3), the first time water squeezing processing carries out in No. 1 press master；
Preferably, No. 1 press master is any press master well known in the prior art；
Preferably, the mixed material after the first time sofening treatment enters No. 1 shove in such a way that screw rod feeds
In machine；
Preferably, the first shove water can be used as the raw material of low-grade paper slurry, such as pack the raw material of pulp material；?
After being diluted with water, as recycle-water；It is also used as preparing the raw material of fertilizer；
According to the present invention, in step 4), second of water squeezing processing carries out in No. 2 press masters；
Preferably, No. 2 press masters are any press master well known in the prior art, and also preferably power is less than
Any press master well known in the prior art of No. 1 press master；
Preferably, the mixed material of the first time shove enters in No. 2 press masters in such a way that screw rod feeds；
Preferably, the second shove water can be used as the raw material of low-grade paper slurry, such as pack the raw material of pulp material；?
After being diluted with water, as recycle-water；It is also used as preparing the raw material of fertilizer；
Preferably, in step 4), the clear water and/or when being added to guarantee second of water squeezing processing of recycle-water
It can remove more non-fibrous materials；The additional amount of the clear water and/or recycle-water can be according to the first shove mixed material
Dry and wet degree selected, it is poor to avoid leading to problems such as due to water shortage squeezing out effect；
According to the present invention, in step 5), the third time water squeezing processing carries out in No. 3 press masters；
Preferably, No. 3 press masters are any press master well known in the prior art, and also preferably power is less than
Any press master well known in the prior art of No. 2 press masters；
Preferably, the mixed material of second of shove enters in No. 3 press masters in such a way that screw rod feeds；
Preferably, the third shove water is back to use in No. 1 reactor tank as recycle-water；
Preferably, suitable quantity of water and/or recycle-water is added in the second shove mixed material, be added a small amount of water and/or
Recycle-water so that the second shove mixed material reaches thick state, and reaches the degree that material does not drip in the hand；
According to the present invention, in step 6), the mixing and second of sofening treatment carry out in No. 2 reactor tanks；
Preferably, the third shove mixed material and medicament enter in No. 2 reactor tanks in such a way that screw rod feeds；
Wherein, No. 2 reactor tanks do not limit specifically, such as outer preferably with the insulation reaction tank of attemperator
Week has the reactor tank of insulating layer (such as rock wool layer)；Also preferably volume is less than the top of No. 1 reactor tank with watch window, outer
Week has the reaction tinning of rock wool layer；The watch window is for observing the softening degree of mixed material and sight in softening process
Examine discharge quantity, dry and wet degree, the color etc. of charging；The insulating layer of the periphery setting is used to maintain the temperature in reactor tank, with
Ensure that reacts goes on smoothly.
According to the present invention, in step 6), the medicament includes water, sodium hydroxide and hydrogen peroxide, and water can be clear water
Or recycle-water or the two combine；
Preferably, the medicament is made of clear water and/or recycle-water, sodium hydroxide and hydrogen peroxide；
Preferably, the mass ratio of clear water and/or recycle-water is 100:300-600 in the pulping raw material and medicament；It is described
The mass ratio of sodium hydroxide and hydrogen peroxide is 1:0.9~1.1, for example, 1:1；
Preferably, the mass ratio of the pulping raw material and sodium hydroxide and hydrogen peroxide is according to third shove mixed material
Softening degree adjustment；If bating effect is bad, need to add sodium hydroxide and hydrogen peroxide；Sodium hydroxide and hydrogen peroxide simultaneously
Additional amount to guarantee the mixed material in No. 2 reactor tanks pH be 10-12, for example, 11；
Preferably, the time of second of sofening treatment is for 70min or more or more long, such as 120min；It is preferred that logical
The pH of the mixed material of detection No. 2 reactor tanks of discharge is crossed to control the reaction time, the pH is 7-9；Due to softening oneself reacted
The temperature of the heat insulation effect of fever phenomenon and reactor tank, second of sofening treatment is maintained at 70-90 DEG C；
According to the present invention, it in step 6), if the pH of the mixed material of No. 2 reactor tanks of discharge is greater than 9, is reacted at No. 2
The tank screw rod that discharges adjusts the pH of mixed material close to the position acid adding of No. 2 reactor tank discharge ports, down between 7-9, then
Carry out the 4th water squeezing processing；
According to the present invention, in step 7), the 4th water squeezing processing carries out in No. 4 press masters；
Preferably, the mixed material after second of sofening treatment enters No. 4 shoves in such a way that screw rod feeds
In machine；
Preferably, No. 4 press masters are any press master well known in the prior art, and also preferably power is less than
Any press master well known in the prior art of No. 3 press masters；
Preferably, the 4th shove water is as recycle-water reuse to No. 1 reactor tank and/or No. 2 reactor tanks；
According to the present invention, in step 7), the pH by the 4th shove mixed material described in shove is 6.5-7, for example,
7, if the pH of the 4th shove mixed material of No. 4 press masters of discharge is lower than 6.5, in No. 4 press master discharging screw rods close to No. 4
A small amount of hydrogen peroxide and sodium hydroxide is added in the position of press master discharge port, it is ensured that the pH of mixed material is 6.5-7；If pH is higher than
7, then a small amount of acid is added close to the position of No. 4 press master discharge ports in No. 4 press masters discharging screw rods, it is ensured that the pH of mixed material
For 6.5-7；
According to the present invention, in step 8), due to spontaneous thermal phenomenon during the grinding process, the temperature of the high consistency refining
It is 90-100 DEG C；
Preferably, the mass ratio of the pulping raw material and bleaching agent is 8:1；
Preferably, the 4th shove mixed material and bleaching agent enter highly concentrated mill in such a way that screw rod feeds
In；
Preferably, the clear water be added to guarantee grinding effect；The additional amount of the clear water can be according to the 4th
The dry and wet situation of secondary shove mixed material is selected, and mill is avoided phenomena such as material overdrying or localized hyperthermia occur；
According to the present invention, in step 9), the bleaching carries out in No. 3 reactor tanks；
Preferably, the grinding slurry enters in No. 3 reactor tanks in such a way that screw rod feeds；
Preferably, No. 3 reactor tanks do not limit specifically, preferably with the insulation reaction tank of attemperator, such as
Periphery has the reactor tank of insulating layer (such as rock wool layer)；Also preferably volume less than No. 2 reactor tanks top with watch window,
Periphery has the reaction tinning of rock wool layer；The watch window for observe in softening process the softening degree of mixed material and
Observe discharge quantity, dry and wet degree, the color etc. of charging；The insulating layer of the periphery setting is used to maintain the temperature in reactor tank,
To ensure that reacts goes on smoothly；
Preferably, the time of the bleaching is for 70 minutes or more or more long, such as 120min；Due to bleaching action
Spontaneous thermal phenomenon, the temperature of the bleaching is 70-90 DEG C；
Preferably, the mixed material i.e. pH of finished pulp that No. 3 reactor tanks are discharged is 7-7.5.
According to the present invention, the pulping process of the grass class plant specifically includes:
In step 2), the first time sofening treatment carries out in No. 1 reactor tank；In step 3), the first time
Water squeezing processing carries out in No. 1 press master；In step 4), second of water squeezing processing carries out in No. 2 press masters；In step
It is rapid 5) in, third time water squeezing processing carries out in No. 3 press masters；In step 6), second of sofening treatment is at No. 2
It is carried out in reactor tank；In step 7), the 4th water squeezing processing carries out in No. 4 press masters；In step 9), the drift
White processing carries out in No. 3 reactor tanks；
The reactor tank is that top has watch window, and periphery has the reactor tank of insulating layer；No. 1 reactor tank, No. 2
The volume (or processing capacity) of reactor tank and No. 3 reactor tanks successively successively decreases；The charging and discharging of the reactor tank are to pass through spiral
What the mode that bar squeezes out carried out；
No. 1 press master, No. 2 press masters, No. 3 press masters and No. 4 press masters are the press master that power successively successively decreases；
The charging and discharging of the press master are carried out in such a way that screw rod squeezes out.
In step 2), the addition of the medicament is so that the pH of the mixed material of No. 1 reactor tank is more than or equal to 12；Control row
The pH of the mixed material of No. 1 reactor tank is 9-10 out；
In step 6), medicament addition so that the mixed material of No. 2 reactor tanks pH be 10-12, preferably 11, control row
The pH of the mixed material of No. 2 reactor tanks is 7-9 out；
It is 6.5-7 by the pH of the 4th shove mixed material described in shove in step 7), for example, 7；
In step 9), the mixed material i.e. pH of finished pulp that No. 3 reactor tanks are discharged is 7-7.5.
In step 7), if the pH of the mixed material of No. 2 reactor tanks of discharge is greater than 9, in No. 2 reactor tanks discharging screw rods
The pH that mixed material is adjusted close to the position acid adding of No. 2 reactor tank discharge ports, down between 7-9, entering back into No. 4 shoves
Water squeezing processing is carried out in machine；
In step 8), if the pH of the 4th shove mixed material of No. 4 press masters of discharge is lower than 6.5, in No. 4 press masters
The a small amount of alkali of position addition and bleaching agent that the screw rod that discharges squeezes out material mouth close to 4, preferably hydrogen peroxide and sodium hydroxide, it is ensured that mixed
The pH for closing material is 6.5-7；If pH is higher than 7, a small amount of acid is added.
In step 2), the medicament includes water, sodium hydroxide and hydrogen peroxide, and water can be clear water or recycle-water or two
Person's combination；It is preferred that the medicament is made of clear water and/or recycle-water, sodium hydroxide and hydrogen peroxide；
In step 6), the medicament includes water, sodium hydroxide and hydrogen peroxide, water can be clear water or recycle-water or
The two combination；It is preferred that the medicament is made of clear water and/or recycle-water, sodium hydroxide and hydrogen peroxide；
In step 8), the bleaching agent is hydrogen peroxide.
In step 2), the pulping raw material: clear water and/or recycle-water in medicament: sodium hydroxide: the quality of hydrogen peroxide
Than for 100:300-600:5-10:5-10, for example, 100:300:6.2:6.2；
In step 6), the mass ratio of clear water and/or recycle-water is 100:300-600 in the pulping raw material and medicament；
The mass ratio of the sodium hydroxide and hydrogen peroxide is 1:0.9~1.1, for example, 1:1；
In step 6), the mass ratio of the pulping raw material and sodium hydroxide and hydrogen peroxide is according to third shove mixture
The softening degree of material adjusts；If bating effect is bad, need to add sodium hydroxide and hydrogen peroxide；Sodium hydroxide and peroxide simultaneously
Change hydrogen additional amount to guarantee the mixed material in No. 2 reactor tanks pH be 10-12, for example, 11.
In step 8), the bleaching agent is that the mass ratio of hydrogen peroxide is 8:1.
In step 2), the time of the first time sofening treatment is for 70 minutes or more or more long, such as 120min；
In step 6), the time of second of sofening treatment is for 70min or more or more long, such as 120min；It is excellent
The pH of the mixed material of detection No. 2 reactor tanks of discharge was gated to control the reaction time, the pH is 7-9；
In step 9), the time of the bleaching is for 70 minutes or more or more long, such as 120min.
In step 2), when starting reaction, the temperature in No. 1 reactor tank can achieve 90-100 DEG C, or even to 100
DEG C or more；The temperature of final No. 1 reactor tank is maintained at 70-90 DEG C.
In step 6), the temperature of second of sofening treatment is maintained at 70-90 DEG C；
In step 8), the temperature of the high consistency refining is 90-100 DEG C；
In step 9), the temperature of the bleaching is 70-90 DEG C.
In step 3), raw material of the first shove water as low-grade sizing process made of paper such as packs the raw material of pulp material；
Or as the raw material for preparing fertilizer；
In step 4), the second shove water can be used as the raw material of low-grade sizing process made of paper, such as packaging pulp material
Raw material；It is also used as preparing the raw material of fertilizer；
In step 5), the third shove water is back to use in No. 1 reactor tank as recycle-water；
In step 7), the 4th shove water is as recycle-water reuse to No. 1 reactor tank and/or No. 2 reactor tanks.
According to the present invention, the pulping process of the grass class plant specifically includes:
Dry grass class plant is selected, removal of impurities dedusting crushes, and raw material is broken into 2-3 centimetres of section material, sieving separating obtains
To pulping raw material, it is stored in feed bin；
1 ton of above-mentioned pulping raw material is added in No. 1 reactor tank in such a way that screw rod feeds, is added using identical
3 tons of clear water and/or recycle-water, 62kg hydrogen peroxide and 62kg sodium hydroxide are added in No. 1 reactor tank by material mode simultaneously,
It stirs evenly, the pH of No. 1 reactor tank mixed material is kept to be more than or equal to 12；Due to the spontaneous thermal phenomenon of softening reaction, start anti-
At once, the temperature in No. 1 reactor tank can achieve 90-100 DEG C, the temperature with the extension of sofening treatment time, in No. 1 reactor tank
Degree is maintained at 70-90 DEG C；By watch window observe softening process in mixed material softening degree, adjust sofening treatment when
Between, general sofening treatment is 70-120min, and the pH that the mixed material of No. 1 reactor tank is discharged is made to be 9-10；
By the mixed material after above-mentioned sofening treatment, it is sent into No. 1 press master, separates in such a way that screw rod feeds
To the first shove mixed material and the first shove water；First shove water is as the pulping raw material of wrapping paper or as preparing fertilizer
Raw material；
It adopts in a like fashion, by the first shove mixed material according to its dry and wet degree, a small amount of clear water of selective addition
Or recycle-water, it is sent into No. 2 press masters, isolated second shove mixed material and the second shove water；By the second shove mixture
Proper amount of clear water and/recycle-water is added in material, is sent into No. 3 press masters, isolated third shove mixed material and third shove water；
The second shove water is as the pulping raw material of wrapping paper or as the raw material for preparing fertilizer, and the third shove water is as reuse
Water reuses；
In such a way that screw rod feeds, No. 2 reactor tanks are added in above-mentioned third shove mixed material, use is identical
Mode, by water, sodium hydroxide, hydrogen peroxide is added in No. 2 reactor tanks, and wherein the mass ratio of water and pulping raw material is 1:3, hydrogen
The mass ratio of sodium oxide molybdena and hydrogen peroxide is 1:1, and with No. 1 reactor tank ratio, the drug dose is few, and is mixed according to third shove
The softening degree of material, adjustment dosing need to add if softening is bad, and the additional amount of medicament will guarantee in No. 2 reactor tanks
Mixed material pH be 10-12；Due to the spontaneous thermal phenomenon of softening reaction, the temperature in No. 2 reactor tanks is maintained at 70-90
℃；The softening degree of mixed material in softening process is observed by watch window, adjusts the sofening treatment time, general sofening treatment
70min or more, and the pH that No. 2 reactor tank mixed materials are discharged is made to be 7-9；If the pH of the mixed material of No. 2 reactor tanks is discharged
Greater than 9, then the pH of mixed material is adjusted close to the position acid adding of No. 2 reactor tank discharge ports in No. 2 reactor tanks discharging screw rods, is made
It is down between 7-9, enters back into No. 4 press masters and carries out water squeezing processing；
Said mixture material is sent into No. 4 press masters in such a way that screw rod feeds, obtains the 4th shove mixture
Material and the 4th shove water, and the pH that the 4th shove mixed material is discharged is made to be 6.5-7；If the No. 4 press masters are discharged the 4th squeezes
The pH of pulp mixture material is lower than 6.5, then a small amount of peroxide is added in the position that No. 4 press masters discharging screw rods squeeze out material mouths close to 4
Change hydrogen and sodium hydroxide, it is ensured that the pH of mixed material is 6.5-7；If pH is higher than 7, a small amount of acid is added；4th shove water conduct
Recycle-water reuses.
By the 4th above-mentioned shove mixed material and 125kg hydrogen peroxide bleaching, sent in such a way that screw rod feeds
Enter in highly concentrated mill, due to spontaneous thermal phenomenon during the grinding process, the temperature of the high consistency refining is 90-100 DEG C；Ground
Cheng Zhong can be added clear water according to the dry and wet situation of the 4th shove mixed material, mill is avoided material overdrying or part occur
Phenomena such as high temperature；
Said mixture material is sent into No. 3 reactor tanks in such a way that screw rod feeds；Bleaching 70-120min；
The temperature of No. 3 reactor tanks is 70-90 DEG C；The mixed material that No. 3 reactor tanks are discharged is finished product slurry, pH 7-7.5.
In the present invention, the volume (or processing capacity) of No. 1 reactor tank, No. 2 reactor tanks and No. 3 reactor tanks is successively passed
Subtracting, such as No. 1 reactor tank can fill 10 tons of raw materials, No. 2 reactor tanks can be 5 tons, No. 3 reactor tanks can be the 1/3 of No. 1 tank, this
Mainly since in the treatment process of pulping raw material, with the removing of non-fibrous material, remaining content of cellulose gradually subtracts
Reactor tank that is low, thus successively being reduced using volume (or processing capacity), can with the utilization of the effectively save energy, moreover,
It can also guarantee the progress of the efficient stable of reaction.
In the present invention, No. 1 press master, No. 2 press masters, No. 3 press masters and No. 4 press masters are that power successively successively decreases
Press master, this is mainly due to shove processing during, not only squeeze the water out, it is also necessary to will be non-in pulping raw material
Fibrous matter removes, more importantly passing through the effect of exchanging views of press master, the fiber block in mixed material is changed into fiber
Silk, improves the quality of finished pulp；If the power of four press masters used is identical or incremented by successively, although its processing capacity
Increase, but mixed slurry cannot adequately fill up press master, cannot preferably play the effect exchanged views, and lead to the shove of press master
It is ineffective, it is also possible to need to be added more medicaments and carry out softening and bleaching, not only cause unnecessary waste, can also
The difficulty for aggravating post-processing, reduces the quality of slurrying.
The present invention also provides a kind of paper grade (stock) slurry, the slurry is prepared by the above method.
The present invention also provides a kind of paper, the paper is prepared by above-mentioned paper grade (stock) slurry.
The present invention also provides a kind of cardboard, the cardboard is prepared by above-mentioned paper grade (stock) slurry.
Beneficial effects of the present invention:
The present invention provides a kind of technique for preparing high-grade paper slurry using grass class plant as raw material, the top grade is made of paper
Sizing process uses grass class plant for raw material, is made using the technique that three tanks four squeeze a highly concentrated mill.The technique is not necessarily to boiling, utilizes
Self-formed from reaction heat, reduces energy consumption of reaction, production cost.The technique softens extrusion process using repeatedly segmentation simultaneously, according to each
Stage softens material composition difference, and the Discrete control for adjusting pH value in stages process successively decreases, thus sufficiently discongests in gramineae plant
Non-cellulosic material and efficiently separated with cellulose, but also reaction process condition is mild, reduce environmental pollution；And it uses
Segmentation softening extrusion process, so that each stage waste liquid is classified, it is different according to its pH value and its constituent content, using different recycling
Processing mode, wherein the expressed water of 1, No. 2 press master is as the raw material for preparing fertilizer, and the expressed water of 3, No. 4 press masters is because of it
The not high impurity of pH value is few, more limpid, can be used as the recycle-water in high-grade sizing process made of paper, so that hand work is brought
The fine recovery processing of waste liquid.To sum up, the segmentation of the high-grade paper of the present invention softens extrusion process, substantially increases gramineae plant raw material
Availability, improve the availability of reaction black liquor, and the paper pulp of high quality be made, slurry yield, the side such as pulp strength
Face is superior to the prior art, realizes that whole process without discharge, reduces environmental pollution, save the cost.
Detailed description of the invention
Fig. 1 is to prepare high-grade paper slurry in a preferred embodiment of the present invention by raw material of grass class plant
Process flow chart.
The aspect graph of fiber in the slurry that Fig. 2 is prepared for embodiment 1.
Fig. 3 is the drainage rate figure for the slurry that embodiment 1 is prepared.
Specific embodiment
[raw materials and reagents]
Sodium hydroxide described in the present embodiment is the raw material of industry that concentration is more than or equal to 99.9%；
Hydrogen peroxide described in the present embodiment is the raw material of industry that concentration is more than or equal to 50.0%；
Grass class plant described in the present embodiment is selected from dry straw and cotton stalk.
[instrument and equipment]
No. 1 reactor tank, No. 2 reactor tanks and No. 3 reactor tanks in the present embodiment are top with watch window, peripheral zone
There is the reaction unit of rock wool layer；The volume (or processing capacity) of No. 1 reactor tank, No. 2 reactor tanks and No. 3 reactor tanks successively decreases.
No. 1 press master, No. 2 press masters, No. 3 press masters and No. 4 press masters in the present embodiment are the shove of power decay
Machine.
[characterization of slurry and its paper being prepared and cardboard]
1. slurry characterizes
Slurry surveys unscreened yield after screening, and screened stock carries out chemical composition analysis and pulp property analysis respectively:
(1) chemical composition analysis is carried out after Benzene-ethanol extraction；
(2) it is discongested with standard dissociation device, beating degree is surveyed in sampling, carries out fibre analysis and size performance analysis.
1.1 screening
(1) laboratory apparatus: rotary strainer
(2) experimental method: thick slurry is screened after wet pulp dissociation device is discongested with rotary strainer, screen slot 0.2mm.
1.2 fibre morphology
(1) laboratory apparatus: XWY-VII fiber instrument
(2) experimental method: optical microscopy is taken pictures
1.3 chemical composition analysis
(1) laboratory apparatus: Soxhlet extractor, holocellulose analyzer, furfural distilling apparatus etc.
(2) experimental method:
The measurement of 10741 paper pulp alcohol-benzene extractive of GB/T
The measurement of 2677.10 paper making raw material holocellulose content of GB/T
The measurement of 745 paper pulp pentosan of GB/T
747 paper pulp acid of GB/T does not allow the measurement of lignin
1.4 slurry drainage rates
(1) laboratory apparatus: DFS-03 type dynamic drainage instrument
(2) experimental method: taking the slurry of 0.5% concentration of 1000mL to be added in dynamic drainage instrument, opens stirring, metering filter
Time used in 500g filtrate out.
2. paper performance is analyzed:
(1) laboratory apparatus: balance, whiteness instrument, tensile test instrument, bursting strength instrument, folding strength instrument etc.
(2) experimental method:
451.2 paper of GB/T and the quantitative measurement of cardboard
The measurement of GB/T 451.3 paper and calliper
Measurement diffusion-normal beam technique of 7974 paper of GB/T, cardboard and brightness of pulp (whiteness)
The measurement (diffusing reflection method) of 1543 paper of GB/T and cardboard opacity (paper backing)
The measurement of GB/T 12914 paper and cardboard tensile strength
The measurement of 454 paper bursting strength of GB/T
The measurement of GB/T 455 paper and cardboard tearability
The measurement of GB/T 457 paper and cardboard folding strength
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.Furthermore, it is to be understood that after having read documented content of the invention, this field skill
Art personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within limited range of the present invention.
In the description of the present invention, it should be noted that term " first ", " second ", " third ", " the 4th ", " No. 1 ",
" No. 2 ", " No. 3 ", " No. 4 " etc. are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Embodiment 1
One, grass class plant --- the pretreatment of straw
Dry straw is selected, removal of impurities dedusting crushes, wherein having a horn-like dedusting dress in the entrance of pulverizer
It sets, there are two horn-like dust-extraction units beside feed bin feed inlet screw rod, and the crushing is that raw material is broken into 2-3 centimetres
Section material, sieving separating obtain pulping raw material, are stored in feed bin.
Two, the preparation of straw slurry
By 1 ton of above-mentioned pulping raw material --- straw is added in No. 1 reactor tank in such a way that screw rod feeds, use
3 tons of clear water and/or recycle-water, 62kg hydrogen peroxide and 62kg sodium hydroxide are added to No. 1 instead by identical feed way simultaneously
It answers in tank, stirs evenly, the pH of No. 1 reactor tank mixed material is kept to be more than or equal to 12；Due to softening the spontaneous thermal phenomenon of reaction,
When starting reaction, the temperature in No. 1 reactor tank can achieve 90-100 DEG C, even higher (other than softening exothermic heat of reaction, spiral
Also can heat in bar feeding process), with the extension of sofening treatment time, the temperature in No. 1 reactor tank is maintained at 70-90 DEG C；
The softening degree that mixed material in softening process is observed by watch window, adjusts the time of sofening treatment, general sofening treatment
For 70-120min, and the pH that the mixed material of No. 1 reactor tank is discharged is made to be 9-10；
By the mixed material after above-mentioned sofening treatment, it is sent into No. 1 press master, separates in such a way that screw rod feeds
To the first shove mixed material and the first shove water；First shove water is as the pulping raw material of wrapping paper or as preparing fertilizer
Raw material；
It adopts in a like fashion, by the first shove mixed material according to its dry and wet degree, a small amount of clear water of selective addition
Or recycle-water, it is sent into No. 2 press masters, isolated second shove mixed material and the second shove water；By the second shove mixture
Proper amount of clear water and/recycle-water is added in material, is sent into No. 3 press masters, isolated third shove mixed material and third shove water；
The second shove water is as the pulping raw material of wrapping paper or as the raw material for preparing fertilizer, and the third shove water is as reuse
Water reuses；
In such a way that screw rod feeds, No. 2 reactor tanks are added in above-mentioned third shove mixed material, use is identical
Mode, by water, sodium hydroxide, hydrogen peroxide is added in No. 2 reactor tanks, and wherein the mass ratio of water and pulping raw material is 1:3, hydrogen
The mass ratio of sodium oxide molybdena and hydrogen peroxide is 1:1, and with No. 1 reactor tank ratio, the drug dose is few, and is mixed according to third shove
The softening degree of material, adjustment dosing need to add if softening is bad, and the additional amount of medicament will guarantee in No. 2 reactor tanks
Mixed material pH be 10-12；Due to the spontaneous thermal phenomenon of softening reaction, the temperature in No. 2 reactor tanks is maintained at 70-90
℃；The softening degree of mixed material in softening process is observed by watch window, adjusts the sofening treatment time, general sofening treatment
70min or more, and the pH that No. 2 reactor tank mixed materials are discharged is made to be 7-9；If the pH of the mixed material of No. 2 reactor tanks is discharged
Greater than 9, then the pH of mixed material is adjusted close to the position acid adding of No. 2 reactor tank discharge ports in No. 2 reactor tanks discharging screw rods, is made
It is down between 7-9, enters back into No. 4 press masters and carries out water squeezing processing；
Said mixture material is sent into No. 4 press masters in such a way that screw rod feeds, obtains the 4th shove mixture
Material and the 4th shove water, and the pH that the 4th shove mixed material is discharged is made to be 6.5-7；If the No. 4 press masters are discharged the 4th squeezes
The pH of pulp mixture material is lower than 6.5, then a small amount of peroxide is added in the position that No. 4 press masters discharging screw rods squeeze out material mouths close to 4
Change hydrogen and sodium hydroxide, it is ensured that the pH of mixed material is 6.5-7；If pH is higher than 7, a small amount of acid is added；4th shove water conduct
Recycle-water reuses.
By the 4th above-mentioned shove mixed material and 125kg hydrogen peroxide bleaching, sent in such a way that screw rod feeds
Enter in highly concentrated mill, due to spontaneous thermal phenomenon during the grinding process, the temperature of the high consistency refining is 90-100 DEG C；Ground
Cheng Zhong can be added clear water according to the dry and wet situation of the 4th shove mixed material, mill is avoided material overdrying or part occur
Phenomena such as high temperature；
Said mixture material is sent into No. 3 reactor tanks in such a way that screw rod feeds；Bleaching 70-120min；
The temperature of No. 3 reactor tanks is 70-90 DEG C；The mixed material that No. 3 reactor tanks are discharged is finished product slurry, pH 7-7.5.
Three, result and analysis
The rice straw pulp that above-described embodiment 1 is prepared is sent to China National Pulp & Paper Research Institute and detects its performance.
By screening it can be concluded that the unscreened yield of the top grade paper slurry is 99.45%.
Fig. 2 gives the aspect graph of fiber in the slurry that embodiment 1 is prepared.As seen from the figure, the present invention is prepared
Slurry in contain tiny fiber, and the content of non-fibrous material is less.Illustrate that pulping yield of the invention is high.
Table 1 is the chemical composition analysis result for the slurry that embodiment 1 is prepared
| Ingredient | Unit | |
| Holocellulose | % | 88.05 |
| Poly-pentose | % | 6.23 |
| Acid-insoluble lignin | % | 2.48 |
From table 1 it follows that the main component holocellulose in the slurry that the embodiment of the present invention 1 is prepared is
88.05%, the content of acid-insoluble lignin is only 2.48%；Illustrate to prepare using the technique of the embodiment of the present invention 1, be prepared
Content of cellulose in slurry is higher, and lower to the useless lignin of slurry, and only 2.48%.
Fig. 3 is the drainage rate figure for the slurry that embodiment 1 is prepared, it can be seen from the figure that the drainage speed of the slurry
Degree is 134s/500g.
Table 2 is the paper test result for the slurry preparation being prepared by embodiment 1
| Index | As a result |
| Quantitative (g/m2) | 63.4 |
| Thickness (μm) | 106 |
| Tightness (g/cm3) | 0.60 |
| Whiteness (%) | 37.16 |
| Opacity (%) | 97.61 |
| Tensile strength (Nm/g) | 73.4 |
| Elongation (%) | 2.91 |
| Burst index (kPam2/g) | 4.78 |
| Fracture indices (mNm2/g) | 4.43 |
| Folding (secondary) | 527 |
From Table 2, it can be seen that the paper being prepared by the slurry of the embodiment of the present invention 1 is in tensile strength, resistance to broken finger
The aspect of performance such as number, tear index are all very excellent.
Embodiment 2
One, grass class plant --- cotton stalk pretreatment
Dry cotton stalk is selected, removal of impurities dedusting crushes, wherein having a horn-like dedusting dress in the entrance of pulverizer
It sets, there are two horn-like dust-extraction units beside feed bin feed inlet screw rod, and the crushing is that raw material is broken into 2-3 centimetres
Section material, sieving separating obtain pulping raw material, are stored in feed bin.
Two, the preparation of cotton stalk slurry
By 1 ton of above-mentioned pulping raw material --- cotton stalk is added in No. 1 reactor tank in such a way that screw rod feeds, use
3 tons of clear water and/or recycle-water, 62kg hydrogen peroxide and 62kg sodium hydroxide are added to No. 1 instead by identical feed way simultaneously
It answers in tank, stirs evenly, the pH of No. 1 reactor tank mixed material is kept to be more than or equal to 12；Due to softening the spontaneous thermal phenomenon of reaction,
When starting reaction, the temperature in No. 1 reactor tank can achieve 90-100 DEG C, even higher (other than softening exothermic heat of reaction, spiral
Also can heat in bar feeding process), with the extension of sofening treatment time, the temperature in No. 1 reactor tank is maintained at 70-90 DEG C；
The softening degree that mixed material in softening process is observed by watch window, adjusts the time of sofening treatment, general sofening treatment
For 70-120min, and the pH that the mixed material of No. 1 reactor tank is discharged is made to be 9-10；
By the mixed material after above-mentioned sofening treatment, it is sent into No. 1 press master, separates in such a way that screw rod feeds
To the first shove mixed material and the first shove water；Pulping raw material of the first shove water as wrapping paper；It adopts in a like fashion,
By the first shove mixed material according to its dry and wet degree, selection is added a small amount of clear water or recycle-water, is sent into No. 2 press masters, separates
Obtain the second shove mixed material and the second shove water；Proper amount of clear water and/recycle-water is added in second shove mixed material, is sent into
In No. 3 press masters, isolated third shove mixed material and third shove water；System of the second shove water as wrapping paper
Raw material is starched, the third shove water is reused as recycle-water；
In such a way that screw rod feeds, No. 2 reactor tanks are added in above-mentioned third shove mixed material, use is identical
Mode, by water, sodium hydroxide, hydrogen peroxide is added in No. 2 reactor tanks, and wherein the mass ratio of water and pulping raw material is 1:3, hydrogen
The mass ratio of sodium oxide molybdena and hydrogen peroxide is 1:1, and with No. 1 reactor tank ratio, the drug dose is few, and is mixed according to third shove
The softening degree of material, adjustment dosing need to add if softening is bad, and the additional amount of medicament will guarantee in No. 2 reactor tanks
Mixed material pH be 10-12；Due to the spontaneous thermal phenomenon of softening reaction, the temperature in No. 2 reactor tanks is maintained at 70-90
℃；The softening degree of mixed material in softening process is observed by watch window, adjusts the sofening treatment time, general sofening treatment
70min or more, and the pH that No. 2 reactor tank mixed materials are discharged is made to be 7-9；If the pH of the mixed material of No. 2 reactor tanks is discharged
Greater than 9, then the pH of mixed material is adjusted close to the position acid adding of No. 2 reactor tank discharge ports in No. 2 reactor tanks discharging screw rods, is made
It is down between 7-9, enters back into No. 4 press masters and carries out water squeezing processing；
Said mixture material is sent into No. 4 press masters in such a way that screw rod feeds, obtains the 4th shove mixture
Material and the 4th shove water, and the pH that the 4th shove mixed material is discharged is made to be 6.5-7；If the No. 4 press masters are discharged the 4th squeezes
The pH of pulp mixture material is lower than 6.5, then a small amount of peroxide is added in the position that No. 4 press masters discharging screw rods squeeze out material mouths close to 4
Change hydrogen and sodium hydroxide, it is ensured that the pH of mixed material is 6.5-7；If pH is higher than 7, a small amount of acid is added；4th shove water conduct
Recycle-water reuses.
By the 4th above-mentioned shove mixed material and 125kg hydrogen peroxide bleaching, sent in such a way that screw rod feeds
Enter in highly concentrated mill, due to spontaneous thermal phenomenon during the grinding process, the temperature of the high consistency refining is 90-100 DEG C；Ground
Cheng Zhong can be added clear water according to the dry and wet situation of the 4th shove mixed material, mill is avoided material overdrying or part occur
Phenomena such as high temperature；
Said mixture material is sent into No. 3 reactor tanks in such a way that screw rod feeds；Bleaching 70-120min；
The temperature of No. 3 reactor tanks is 70-90 DEG C；The mixed material that No. 3 reactor tanks are discharged is finished product slurry, pH 7-7.5.
More than, embodiments of the present invention are illustrated.But the present invention is not limited to above embodiment.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of technique for preparing high-grade paper slurry as raw material using grass class plant comprising following steps:
1) grass class plant material is pre-processed, obtains pulping raw material, is stored in feed bin；
2) pulping raw material and the medicament mixing come out from feed bin, carries out first time sofening treatment；
3) first time water squeezing processing is carried out to the mixed material after the first time sofening treatment of step 2), obtains the mixing of the first shove
Material and the first shove water；
4) it is optionally added into water and/or recycle-water into the first shove mixed material of step 3), carries out second of water squeezing processing,
Obtain the second shove mixed material and the second shove water；
5) water and/or recycle-water are added into the second shove mixed material of step 4), carries out third time water squeezing processing, obtains the
Three shove mixed materials and third shove water；
6) the third shove mixed material and medicament of step 5) are mixed, carries out second of sofening treatment；
7) mixed material after second of sofening treatment of step 6) is optionally added into alkali or sour progress the 4th after adjusting its pH
Secondary water squeezing processing, obtains the 4th shove material and the 4th shove water；
8) the 4th shove mixed material of step 7) is optionally added into alkali or after acid adjusts its pH, bleaching agent and optionally is added
Water carries out highly concentrated mill defibrination, obtains grinding slurry；
9) grinding slurry that highly concentrated mill is discharged in step 8) is subjected to bleaching, obtains high-grade paper slurry.
2. technique according to claim 1, which is characterized in that
In step 2), the first time sofening treatment carries out in No. 1 reactor tank；In step 3), the first time water squeezing
Processing carries out in No. 1 press master；In step 4), second of water squeezing processing carries out in No. 2 press masters；In step 5)
In, the third time water squeezing processing carries out in No. 3 press masters；In step 6), second of sofening treatment is reacted at No. 2
It is carried out in tank；In step 7), the 4th water squeezing processing carries out in No. 4 press masters；In step 9), at the bleaching
Reason carries out in No. 3 reactor tanks；
The reactor tank is that top has watch window, and periphery has the reactor tank of insulating layer；No. 1 reactor tank, No. 2 reactions
Tank and the volume (or processing capacity) of No. 3 reactor tanks successively successively decrease；The charging and discharging of the reactor tank are squeezed by screw rod
What mode out carried out；
No. 1 press master, No. 2 press masters, No. 3 press masters and No. 4 press masters are the press master that power successively successively decreases；It is described
The charging and discharging of press master are carried out in such a way that screw rod squeezes out.
3. technique according to claim 1 or 2, which is characterized in that
In step 2), the addition of the medicament is so that the pH of the mixed material of No. 1 reactor tank is more than or equal to 12；Control discharge 1
The pH of the mixed material of number reactor tank is 9-10；
In step 6), medicament addition so that the mixed material of No. 2 reactor tanks pH be 10-12, preferably 11, control discharge 2
The pH of the mixed material of number reactor tank is 7-9；
It is 6.5-7 by the pH of the 4th shove mixed material described in shove in step 7), for example, 7；
In step 9), the mixed material i.e. pH of finished pulp that No. 3 reactor tanks are discharged is 7-7.5.
4. the technique according to any one of claim 3, which is characterized in that
It is close in No. 2 reactor tank discharging screw rods if the pH of the mixed material of No. 2 reactor tanks of discharge is greater than 9 in step 7)
The position acid adding of No. 2 reactor tank discharge ports adjusts the pH of mixed material, down between 7-9, entering back into No. 4 press masters
Carry out water squeezing processing；
In step 8), if the pH of the 4th shove mixed material of No. 4 press masters of discharge is lower than 6.5, discharge in No. 4 press masters
A small amount of alkali and bleaching agent, preferably hydrogen peroxide and sodium hydroxide is added in the position that screw rod squeezes out material mouth close to 4, it is ensured that mixture
The pH of material is 6.5-7；If pH is higher than 7, a small amount of acid is added.
5. technique described in any one of -4 according to claim 1, which is characterized in that
In step 2), the medicament includes water, sodium hydroxide and hydrogen peroxide, and water can be clear water or recycle-water or both group
It closes；It is preferred that the medicament is made of clear water and/or recycle-water, sodium hydroxide and hydrogen peroxide；
In step 6), the medicament includes water, sodium hydroxide and hydrogen peroxide, and water can be clear water or recycle-water or the two
Combination；It is preferred that the medicament is made of clear water and/or recycle-water, sodium hydroxide and hydrogen peroxide；
In step 8), the bleaching agent is hydrogen peroxide.
6. technique according to any one of claims 1-5, which is characterized in that
In step 2), the pulping raw material: clear water and/or recycle-water in medicament: sodium hydroxide: the mass ratio of hydrogen peroxide is
100:300-600:5-10:5-10, for example, 100:300:6.2:6.2；
In step 6), the mass ratio of clear water and/or recycle-water is 100:300-600 in the pulping raw material and medicament；It is described
The mass ratio of sodium hydroxide and hydrogen peroxide is 1:0.9~1.1, for example, 1:1；
In step 6), the mass ratio of the pulping raw material and sodium hydroxide and hydrogen peroxide is according to third shove mixed material
Softening degree adjustment；If bating effect is bad, need to add sodium hydroxide and hydrogen peroxide；Sodium hydroxide and hydrogen peroxide simultaneously
Additional amount to guarantee the mixed material in No. 2 reactor tanks pH be 10-12, for example, 11.
In step 8), the bleaching agent is that the mass ratio of hydrogen peroxide is 8:1.
7. technique according to claim 1 to 6, which is characterized in that
In step 2), the time of the first time sofening treatment is for 70 minutes or more or more long, such as 120min；
In step 6), the time of second of sofening treatment is for 70min or more or more long, such as 120min；It is preferred that logical
The pH of the mixed material of detection No. 2 reactor tanks of discharge is crossed to control the reaction time, the pH is 7-9；
In step 9), the time of the bleaching is for 70 minutes or more or more long, such as 120min.
8. technique described in any one of -7 according to claim 1, which is characterized in that
In step 2), when starting reaction, the temperature in No. 1 reactor tank can achieve 90-100 DEG C, in addition to 100 DEG C with
On；The temperature of final No. 1 reactor tank is maintained at 70-90 DEG C.
In step 6), the temperature of second of sofening treatment is maintained at 70-90 DEG C；
In step 8), the temperature of the high consistency refining is 90-100 DEG C；
In step 9), the temperature of the bleaching is 70-90 DEG C.
9. technique according to claim 1 to 8, which is characterized in that
In step 3), raw material of the first shove water as low-grade sizing process made of paper such as packs the raw material of pulp material；Or
As the raw material for preparing fertilizer；
In step 4), the second shove water can be used as the raw material of low-grade sizing process made of paper, such as pack the raw material of pulp material；
It is also used as preparing the raw material of fertilizer；
In step 5), the third shove water is back to use in No. 1 reactor tank as recycle-water；
In step 7), the 4th shove water is as recycle-water reuse to No. 1 reactor tank and/or No. 2 reactor tanks.
10. technique according to claim 1 to 9, which is characterized in that
Dry grass class plant is selected, removal of impurities dedusting crushes, and raw material is broken into 2-3 centimetres of section material, sieving separating is made
Raw material is starched, is stored in feed bin；
1 ton of above-mentioned pulping raw material is added in No. 1 reactor tank in such a way that screw rod feeds, using identical charging side
3 tons of clear water and/or recycle-water, 62kg hydrogen peroxide and 62kg sodium hydroxide are added in No. 1 reactor tank simultaneously, stir by formula
Uniformly, the pH of No. 1 reactor tank mixed material is kept to be more than or equal to 12；Due to the spontaneous thermal phenomenon of softening reaction, when starting reaction,
Temperature in No. 1 reactor tank can achieve 90-100 DEG C, and with the extension of sofening treatment time, the temperature in No. 1 reactor tank is protected
It holds at 70-90 DEG C；The softening degree that mixed material in softening process is observed by watch window, adjusts the time of sofening treatment,
General sofening treatment is 70-120min, and the pH that the mixed material of No. 1 reactor tank is discharged is made to be 9-10；
It by the mixed material after above-mentioned sofening treatment, is sent into No. 1 press master in such a way that screw rod feeds, isolated the
One shove mixed material and the first shove water；First shove water is as the pulping raw material of wrapping paper or as the original for preparing fertilizer
Material；
It adopts in a like fashion, by the first shove mixed material according to its dry and wet degree, a small amount of clear water of selective addition or returns
With water, it is sent into No. 2 press masters, isolated second shove mixed material and the second shove water；Second shove mixed material is added
Enter proper amount of clear water and/recycle-water, is sent into No. 3 press masters, isolated third shove mixed material and third shove water；It is described
Second shove water as the pulping raw material of wrapping paper or as the raw material for preparing fertilizer, the third shove water as recycle-water again
Secondary use；
In such a way that screw rod feeds, No. 2 reactor tanks are added in above-mentioned third shove mixed material, using identical side
Formula, by water, sodium hydroxide, hydrogen peroxide is added in No. 2 reactor tanks, and wherein the mass ratio of water and pulping raw material is 1:3, hydrogen-oxygen
The mass ratio for changing sodium and hydrogen peroxide is 1:1, and with No. 1 reactor tank ratio, the drug dose is few, and according to third shove mixture
The softening degree of material, adjustment dosing need to add if softening is bad, and the additional amount of medicament will guarantee in No. 2 reactor tanks
The pH of mixed material is 10-12；Due to the spontaneous thermal phenomenon of softening reaction, the temperature in No. 2 reactor tanks is maintained at 70-90 DEG C；
The softening degree of mixed material in softening process is observed by watch window, adjusts the sofening treatment time, general sofening treatment
70min or more, and the pH that No. 2 reactor tank mixed materials are discharged is made to be 7-9；If the pH of the mixed material of No. 2 reactor tanks is discharged
Greater than 9, then the pH of mixed material is adjusted close to the position acid adding of No. 2 reactor tank discharge ports in No. 2 reactor tanks discharging screw rods, is made
It is down between 7-9, enters back into No. 4 press masters and carries out water squeezing processing；
By said mixture material screw rod feed by way of be sent into No. 4 press masters, obtain the 4th shove mixed material and
4th shove water, and the pH that the 4th shove mixed material is discharged is made to be 6.5-7；If the 4th shove that No. 4 press masters are discharged is mixed
The pH for closing material is lower than 6.5, then a small amount of hydrogen peroxide is added in the position that No. 4 press masters discharging screw rods squeeze out material mouths close to 4
And sodium hydroxide, it is ensured that the pH of mixed material is 6.5-7；If pH is higher than 7, a small amount of acid is added；4th shove water is as reuse
Water reuses.
By the 4th above-mentioned shove mixed material and 125kg hydrogen peroxide bleaching, height is sent into such a way that screw rod feeds
In dense mill, due to spontaneous thermal phenomenon during the grinding process, the temperature of the high consistency refining is 90-100 DEG C；In process of lapping
In, clear water can be added according to the dry and wet situation of the 4th shove mixed material, mill is avoided material overdrying or part height occur
Phenomena such as warm；
Said mixture material is sent into No. 3 reactor tanks in such a way that screw rod feeds；Bleaching 70-120min；Described 3
The temperature of number reactor tank is 70-90 DEG C；The mixed material that No. 3 reactor tanks are discharged is finished product slurry, pH 7-7.5.
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| CN201710764018.2A CN109423901A (en) | 2017-08-30 | 2017-08-30 | A kind of technique that high-grade paper slurry is prepared as raw material using grass class plant |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB122812A (en) * | 1918-01-29 | 1919-06-19 | Jan Carel Van Wessem | Improvements in and relating to the Manufacture of Fibrous Pulp from Wood and other Ligno-cellulosic Substances. |
| CN106049148A (en) * | 2016-05-27 | 2016-10-26 | 刘长如 | Gramineous cold-soaking pulping and bleaching process |
| CN106223087A (en) * | 2016-09-14 | 2016-12-14 | 黑龙江秀泉科技有限公司 | A kind of dry method pulping process and equipment |
| CN106245393A (en) * | 2016-09-14 | 2016-12-21 | 黑龙江秀泉科技有限公司 | Pulp production device |
-
2017
- 2017-08-30 CN CN201710764018.2A patent/CN109423901A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB122812A (en) * | 1918-01-29 | 1919-06-19 | Jan Carel Van Wessem | Improvements in and relating to the Manufacture of Fibrous Pulp from Wood and other Ligno-cellulosic Substances. |
| CN106049148A (en) * | 2016-05-27 | 2016-10-26 | 刘长如 | Gramineous cold-soaking pulping and bleaching process |
| CN106223087A (en) * | 2016-09-14 | 2016-12-14 | 黑龙江秀泉科技有限公司 | A kind of dry method pulping process and equipment |
| CN106245393A (en) * | 2016-09-14 | 2016-12-21 | 黑龙江秀泉科技有限公司 | Pulp production device |
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