CN106223087A - A kind of dry method pulping process and equipment - Google Patents
A kind of dry method pulping process and equipment Download PDFInfo
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- CN106223087A CN106223087A CN201610825225.XA CN201610825225A CN106223087A CN 106223087 A CN106223087 A CN 106223087A CN 201610825225 A CN201610825225 A CN 201610825225A CN 106223087 A CN106223087 A CN 106223087A
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- Prior art keywords
- cellulose
- dry method
- pulping process
- section
- gradating
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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
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
-
- 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
-
- 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 provides a kind of dry method pulping process and equipment, pulping process includes: raw material cut-out, section material size degradation, screening, removes non-fibrous material, bleaches described cellulosic material acquisition finished product paper pulp.The dry method pulping process that the present invention provides, it is achieved that pollution-free, the target of zero-emission, technique is simple, energy consumption is low, slurrying low cost.The dry non-fibrous material taking grass class 40%, is a kind of optimal breeding feed, can save substantial amounts of grain.The white pulp yield of papermaking 55%, paper pulp need not wash, and pulping process does not produce a water;Pulp brightness is high, the intensity of paper is good, not brightness reversion.
Description
Technical field
The present invention relates to pulp technology for making paper, especially relate to a kind of dry method pulping process based on annual fibrous raw material
And equipment.
Background technology
At present, China paper industry is faced with raw material resources shortage, pollutes still serious and technique and relatively fall behind etc. and to ask
Topic.
According to statistics, due to China Forest shortage of resources, national paper pulp consumption figure in 2008: wood pulp 22%, non-slurry accounts for
18%, secondary stock accounts for 60%.Wherein secondary stock and raw material of wood pulp are mainly by import, and as a example by waste paper, imported waste paper raw material accounts for useless
Paper material consumption ratio is carried 46% to 2008 by 26% in 2000, need to spend a large amount of foreign exchange every year.Data above
Demonstrating China domestic pulping source, compared with international modern paper industry employing more than 90% wood pulp papermaking, raw material is tied
Structure is the most unreasonable.Its fundamental solution is that making full use of technological means starts the paper pulp resource of new suitable for China.
Since the mid-80 state-of-the-nation call implementation in last century integrated timber-paper, go over decades to year in 2003
The end, China's plantation fast-growing, high-yield woods area is less than 3,000,000 mu.Only account for the 1.4% of whole planning area, and, many enterprises kind
The fast-growing woods planted is only ornamental plantation, is really used for the micro-little of papermaking.
Root is it was predicted that by 2010, China's paper product apparent consumption was up to 80,000,000 tons.If wanting when the time comes to change me
State's slurry irrational present situation of source structure, if domestic wood pulp ratio to be allowed reaches 90%, needs timber about 1.8 hundred million side the most every year,
The area needing fast-growing woods must reach annual about 102,870,000 hectares (closing 1.53 hundred million mu), and this is the most unpractical, and this proves
, if it is desired to reversing China's slurry irrational fact of source structure, it is far from being enough for depending integrated timber-paper alone.Must also be abundant
Utilize the year raw fibre resources of China's abundant.
China is a large agricultural country, and due to populous, per capita resources occupation rate is low, and resource is most valuable.But, greatly
That measures is annual, is not used such as fibrous raw material the most for want of technological means such as cotton stalk, bamboo, phragmites communiss.Grass
In non-fibrous material more, and non-fibrous material is the natural enemy of slurrying, is also the with serious pollution main contributor of paper industry.
Thus, for the most perennial timber, grass is when as paper making raw material, and nature can cause it to produce
The cost of link is high, it is bigger to pollute, and the technical problem such as the quality of paper pulp and paper product is relatively low.
Summary of the invention
It is an object of the invention to provide a kind of dry method pulping process and equipment, with solve present in prior art standing grain this
Non-fibrous material in section plant is more, and thus, for the most perennial timber, grass is as paper making raw material
Time, nature can cause that the cost of its production link is high, it is bigger to pollute, and the quality of paper pulp and paper product is relatively low etc., and technology is asked
Topic.
For solving above-mentioned technical problem, a kind of dry method pulping process that the present invention provides, it specifically includes following steps:
Step one: raw material cuts off;
Pulping raw material is cut into the section material of 2-3cm length;
Step 2: section material size degradation;
Utilize disintegrating apparatus that described section of material is carried out size degradation, the non-fibrous material in section material is smashed, and forces non-fiber
Material departs from from section material;
Step 3: screening, removes non-fibrous material;
Utilize the section material after the mesh screen screening size degradation of 60 80 mesh, the non-fibrous material in section material is sifted out;
Step 4: repeat step 2 and three, until the non-fibrous material in section material is all removed, and then obtains the fibre of slurrying
Dimension element raw material;
Step 5: bleach described cellulosic material and obtain finished product paper pulp.
Further, in described step 2, described section of material is carried out size degradation, utilize mechanical-physical strength to attack lignin and divide greatly
Son so that phenyl ring ftractures.
Further, described step 5 specifically includes following steps:
Step 1: adding sodium hydroxide and water in described cellulosic material, concrete charge ratio is:
Cellulose: water: sodium hydroxide=100: (200-300): (1-8),
Obtain cellulose one gradating material;
Step 2: stirred by cellulose one gradating material, is heated to 80 DEG C by cellulose one gradating material;
Keep temperature 1-5 minute, carry out sofening treatment;
Step 3: adding hydrogen peroxide in described cellulose one gradating material, charge ratio is:
Cellulose one gradating material: hydrogen peroxide=100: (1-l3);
Obtain cellulose B grade mixture material;
Step 4: cellulose B grade mixture material is heated to 90--95 DEG C, keeps temperature 60 120min, carries out bleaching action,
Paper pulp finished product is obtained after bleaching.
Further, in described step 2, in whipping process, in cellulose one gradating material, it is passed through steam for heating.
Further, cellulose one gradating material after processing described step 2 extrudes, and improves cellulose one gradating material
Concentration.
Further, in described step 3, also include described cellulose B grade mixture material is carried out highly concentrated mill defibrination.
Further, described size degradation includes that the preliminary non-fibrous material carried out successively is pulverized, the tear of secondary stock element is exchanged views
And three extruding.
Further, the preliminary non-fibrous material in described size degradation is pulverized, the tear of secondary stock element is exchanged views and squeezed for three times
Pressure circulation repeats 2-4 time.
Further, the described non-fibrous material filtered out processes as breeding feed.
Further, in described step one, raw material carries out dust removal process after cutting off.
The present invention passes through dry method, removes part non-fibrous material by mechanical force and is disperseed by fiber tearing, then at room temperature
Lower dosing is bleached washing pulp under the conditions of highly concentrated by chemical drugs and is synchronized to carry out, and is the new technique of comprehensive function.Be energy-conservation,
Environmental protection, reduction of discharging, low consumption, comprehensive utilization, low cost, high whiteness, the exploration of Novel cement slurry preparing technology of high yield pulp1.
The present invention is that the feature according to grass class carries out researching and developing with structure, and grass non-fibrous material is relatively
Many, it is the natural enemy of slurrying, is also the root polluted.Non-fibrous material being taken out, a reservation process cellulose, slurrying is the most certainly
But so simplify.
And non-fibrous material inherently a kind of flour, in crushing process, it is easy to broken, with cellulose
Departing from, and cellulose is very difficult broken, in screening process, cellulose the most all remains.
And non-fibrous material is rich in nutrition, it is the optimum feed of cultivation, thus can turn waste into wealth, save for aquaculture big
The grain of amount, non-fibrous material in the industrial production, also has the biggest value.
A kind of dry method pulping equipment, includes size degradation equipment, screening installation, softening reaction unit, press master and bleaching successively
Reaction unit;
Non-fibrous material in section material, for raw material cuts into the section material of 2-3cm length, is then beaten by described size degradation equipment
Broken, and force non-fibrous material to depart from from section material;
Described screening installation is for sifting out the non-fibrous material in section material, and then obtains the cellulosic material of slurrying;Institute
The mesh screen sieve aperture stating screening installation is 60 80 mesh;
Described softening reaction unit carries out sofening treatment for addition sodium hydroxide and water in cellulosic material;
Described bleaching action device is for carrying out bleaching to the cellulose after sofening treatment.
Further, described size degradation equipment includes pulverizer and shredder, after pulverizer is arranged on shredder.
Further, the grinder arranged after described size degradation equipment also includes described shredder or pulverizer operation.
Further, described screening installation is vibrosieve, rocking sieve or drum screen.
Further, described softening reaction unit includes that mixing plant, described mixing plant are connected with steam pipework;Steam pipe
Road is connected with steam raising plant, for heating the cellulosic material in mixing plant.
Further, described mixing plant includes storage bin, is provided with agitator in storage bin;Or, described mixing plant
For screw mixer.
Further, described dry method pulping equipment also includes being arranged between described press master and described bleaching action device
High-density paste mill.
Further, described bleaching action device includes pulp Bleaching reactor, is provided with agitator in Bleaching reactor.
Further, described dry method pulping equipment also includes sodium hydroxide medicament tank and sodium peroxide pharmacy jar.
The dry method pulping equipment that the present invention provides, it is achieved that pollution-free, the target of zero-emission, technique is simple, energy consumption is low, system
Slurry low cost.The dry non-fibrous material taking grass class 40%, is a kind of optimal breeding feed, can save substantial amounts of grain
Food.The white pulp yield of papermaking 55%, paper pulp need not wash, and pulping process does not produce a water;Pulp brightness is high, the intensity of paper is good,
Not brightness reversion.
It addition, the present invention has successfully widened raw material resources, thoroughly instead of the tradition of " alkali-free not pulping, do not bleach without chlorine "
Slurrying theory, it is achieved that pollution-free, the ultimate aim of zero-emission slurrying, has also broken non-wood pulp and can not pursue high the outmoded conventions of grade paper,
It it is a significant technology innovation of China's slurrying industry science and technology.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The flow chart of a kind of dry method pulping process that Fig. 1 provides for the embodiment of the present invention;
The structural representation of a kind of dry method pulping equipment that Fig. 2 provides for the embodiment of the present invention.
Reference:
1-shredder;2-pulverizer;3-drum screen;
4-storage bin;5-screw mixer;6-sodium hydroxide medicament tank;
7-press master;8-high-density paste mill;9-Bleaching reactor;
10-sodium peroxide pharmacy jar;11-steam pipework.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertically ",
Orientation or the position relationship of the instruction such as " level ", " interior ", " outward " they are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected;Can
To be mechanical connection, it is also possible to be electrical connection;Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
Below in conjunction with specific embodiment the present invention will be further explained explanation.
Embodiment 1
As it is shown in figure 1, a kind of dry method pulping process that the present embodiment provides, it specifically includes following steps:
Step one: raw material cuts off and dedusting;
Raw material is wheat straw, and pulping raw material cuts into the section material of 2-3cm length;Slight dedusting, purifies wheat straw, as far as possible
Allow wheat straw there is no any loss, allow the breeding feed produced there is no dust.
Step 2: section material size degradation;Mechanical-physical strength is utilized to attack lignin macromolecule so that phenyl ring ftractures.
With disintegrating apparatus such as pulverizers, the wheat straw of the material that is cut into pieces is broken into powder, the non-fibrous material in section material is beaten
Broken, and force non-fibrous material to depart from from cellulose;
Step 3: screening, removes non-fibrous material;
Utilize the section material after the mesh screen screening size degradation of 60 mesh, the non-fibrous material in section material is sifted out;
Step 4: repetition step 2 and 32 to 3 times, until the non-fibrous material in section material is all removed, and then obtains system
The cellulosic material of slurry;After repeating 2-3 time, the cellulose of output is soft and smooth;
Step 5: sofening treatment;
Cellulose after purifying is sent into and is entered storage bin, by feed auger, cellulosic material is delivered to screw mixer
In, hydro-oxidation sodium and water, reacting by heating 1-3 minute, concrete charge ratio is as follows,
Cellulose: water: sodium hydroxide=100: (200-250): (2-6), thus obtain cellulose one gradating material of wheat straw;
Cellulose one gradating material is stirred, cellulose one gradating material is heated to 80 DEG C and keeps temperature 1-5 minute, enter
Row sofening treatment;
Step 6: adding hydrogen peroxide in described cellulose one gradating material, charge ratio is:
Cellulose one gradating material: hydrogen peroxide=100: (1-l3);
Obtain cellulose B grade mixture material;Then carry out highly concentrated mill defibrination, allow cellulose become fine fibre.
Step 7: add thermal bleaching, is heated to 90--95 DEG C by cellulose B grade mixture material, keeps temperature 60 90min,
Starching finished product in vain, whiteness reaches more than 80%.Paper pulp need not wash, and acid adding adjusts pH value, can produce paper after screening.
Wherein it is possible to cellulose one gradating material after sofening treatment is extruded, improve the dense of cellulose one gradating material
Degree.
The non-fibrous material filtered out processes as breeding feed, thus realizes ecological circulation and process.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, and difference is, raw materials used for cotton stalk, in sofening treatment and drift
Bai Shi, the proportioning of cellulosic material, water, alkali and sodium peroxide is 100:(200-300): (l-7): (1-12).
The pulp brightness produced has reached more than 90%.Paper pulp need not wash, and acid adding adjusts PH, after defibrination screens
Produce paper.Cotton stalk pulp is best paper pulp, and can produce various cultural paper.
Embodiment 3
The present embodiment is substantially the same manner as Example 1, and difference is, raw materials used for poplar sheet, poplar sheet is through overdrying
Use as raw material after dry process.
Poplar sheet is through three size degradations and screening.
The cellulose screened, enters storage bin, metering screw send into spice spiral.Add alkali, add water, heat 5 minutes,
Add hydrogen peroxide and carry out highly concentrated mill defibrination, by weight, cellulosic material: water: alkali: hydrogen peroxide=I00: (200-
300)∶(1-7)∶(1-7)。
The fine fibre of milled, heats 90-95 DEG C, reacts 90-120 minute in drift tower, white slurry, whiteness is up to 85%
Above.Its paper pulp need not wash, and acid adding adjusts PH, can produce paper through defibrination, screening.
Embodiment 4
As in figure 2 it is shown, a kind of dry method pulping equipment realizing above-mentioned process that the present embodiment provides, it includes successively
Size degradation equipment, screening installation, softening reaction unit, press master and bleaching action device;
Non-fibrous material in section material, for raw material cuts into the section material of 2-3cm length, is then smashed by size degradation equipment, and
Non-fibrous material is forced to depart from from section material;
Screening installation is for sifting out the non-fibrous material in section material, and then obtains the cellulosic material of slurrying;Screening sets
Standby mesh screen sieve aperture is 60 80 mesh;
Soften reaction unit and carry out sofening treatment for addition sodium hydroxide and water in cellulosic material;
Bleaching action device is for carrying out bleaching to the cellulose after sofening treatment.
Size degradation equipment includes pulverizer 2 and shredder 1.
Screening installation is drum screen 3.
In after screening, storage bin 4 sent into by fibre bundle raw material, storage bin is by helix transporting device with screw mixer 5 even
Connecing, screw mixer 5 is connected with steam pipework 11, heats cellulosic material while stirring, is allowed to soften.
Press master 7 it is provided with, for being extruded by the moisture in cellulosic material, after extrusion after screw mixer 5
Moisture can also be cycled to used in steam heating and the sofening treatment of cellulose.Thus the most less discharging of waste liquid.
It is provided with high-density paste mill 8 after press master 7.High-density paste mill 8 for grinding to form more refinement by cellulosic material
Soft fine fibre.
And bleaching action device includes pulp Bleaching reactor 9, Bleaching reactor 9 is provided with agitator.And hydroxide
Sodium pharmacy jar 6 is used for the alkali of sofening treatment for conveying in screw mixer 5;Sodium peroxide pharmacy jar 10 is then used for storing
Sodium peroxide for bleaching.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit;To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent;And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a dry method pulping process, it is characterised in that it specifically includes following steps:
Step one: raw material cuts off;
Pulping raw material is cut into the section material of 2-3cm length;
Step 2: section material size degradation;
Utilize disintegrating apparatus that described section of material is carried out size degradation, the non-fibrous material in section material is smashed, and forces non-fibrous material
Depart from from section material;
Step 3: screening, removes non-fibrous material;
Utilize the section material after the mesh screen screening size degradation of 60 80 mesh, the non-fibrous material in section material is sifted out;
Step 4: repeat step 2 and three, until the non-fibrous material in section material is all removed, and then obtains the cellulose of slurrying
Raw material;
Step 5: bleach described cellulosic material and obtain finished product paper pulp.
Dry method pulping process the most according to claim 1, it is characterised in that in described step 2, is carried out described section of material
Size degradation, utilizes mechanical-physical strength to attack lignin macromolecule so that phenyl ring ftractures.
Dry method pulping process the most according to claim 1, it is characterised in that described step 5 specifically includes following steps:
Step 1: adding sodium hydroxide and water in described cellulosic material, concrete charge ratio is:
Cellulose: water: sodium hydroxide=100: (200-300): (1-8),
Obtain cellulose one gradating material;
Step 2: stirred by cellulose one gradating material, is heated to 80 DEG C by cellulose one gradating material;
Keep temperature 1-5 minute, carry out sofening treatment;
Step 3: adding hydrogen peroxide in described cellulose one gradating material, charge ratio is:
Cellulose one gradating material: hydrogen peroxide=100: (1-13);
Obtain cellulose B grade mixture material;
Step 4: cellulose B grade mixture material is heated to 90--95 DEG C, keeps temperature 60 120min, carries out bleaching action, bleaching
Rear acquisition paper pulp finished product.
Dry method pulping process the most according to claim 3, it is characterised in that in described step 2, to fibre in whipping process
Tie up in a plain gradating material and be passed through steam for heating.
Dry method pulping process the most according to claim 3, it is characterised in that the cellulose one after described step 2 is processed
Gradating material extrudes, and improves the concentration of cellulose one gradating material.
Dry method pulping process the most according to claim 3, it is characterised in that in described step 3, also includes described fiber
Element B grade mixture material carries out highly concentrated mill defibrination.
Dry method pulping process the most according to claim 1, it is characterised in that it is the most non-that described size degradation includes carrying out successively
Fibrous matter is pulverized, the tear of secondary stock element is exchanged views and three extruding.
Dry method pulping process the most according to claim 1, it is characterised in that the preliminary non-fibrous material powder in described size degradation
The plain tear of broken, secondary stock is exchanged views and three extrusion cycle repeat 2-4 time.
Dry method pulping process the most according to claim 1, it is characterised in that the described non-fibrous material filtered out is as supporting
Grow feedstuff to process.
10. realize a dry method pulping equipment for pulping process described in any one of claim 1-9, include successively size degradation equipment,
Screening installation, softening reaction unit, press master and bleaching action device;
Non-fibrous material in section material, for raw material cuts into the section material of 2-3cm length, is then smashed by described size degradation equipment, and
Non-fibrous material is forced to depart from from section material;
Described screening installation is for sifting out the non-fibrous material in section material, and then obtains the cellulosic material of slurrying;Described sieve
The mesh screen sieve aperture of optional equipment is 60 80 mesh;
Described softening reaction unit carries out sofening treatment for addition sodium hydroxide and water in cellulosic material;
Described bleaching action device is for carrying out bleaching to the cellulose after sofening treatment.
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Cited By (8)
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CN106758456A (en) * | 2017-01-23 | 2017-05-31 | 刘长如 | Sodium metasilicate low-temp reaction pulping process |
CN109082921A (en) * | 2018-07-27 | 2018-12-25 | 重庆理文卫生用纸制造有限公司 | A kind of paper for daily use refining process of high intensity low energy consumption |
CN109423901A (en) * | 2017-08-30 | 2019-03-05 | 黑龙江如柏科技有限公司 | A kind of technique that high-grade paper slurry is prepared as raw material using grass class plant |
CN109422566A (en) * | 2017-08-30 | 2019-03-05 | 黑龙江如柏科技有限公司 | A kind of foliar fertilizer and preparation method thereof that the black liquid generated using soda pulping process technique is prepared |
CN110396843A (en) * | 2019-07-15 | 2019-11-01 | 苏州绿驰机械设备有限公司 | A kind of separating plant non-fibrous material and fibrous matter technique |
CN111501392A (en) * | 2020-06-09 | 2020-08-07 | 吴袖福 | Pollution-free production process and production equipment of plant fiber paper pulp |
CN111535064A (en) * | 2020-04-17 | 2020-08-14 | 华夏瑞天(北京)生物科技有限公司 | Method for preparing ecological fiber by using industrial wastewater containing water-soluble silicon element and application |
CN113846502A (en) * | 2021-10-19 | 2021-12-28 | 南京林业大学 | Dry pulping method for waste paper |
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