CN105386351B - A kind of fast-growing willow pulping process - Google Patents
A kind of fast-growing willow pulping process Download PDFInfo
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- CN105386351B CN105386351B CN201510649598.1A CN201510649598A CN105386351B CN 105386351 B CN105386351 B CN 105386351B CN 201510649598 A CN201510649598 A CN 201510649598A CN 105386351 B CN105386351 B CN 105386351B
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- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting 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
- D21C3/02—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
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
- D21C3/028—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of O3
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
This application discloses a kind of fast-growing willow pulping process, which is characterized in that includes the following steps：Step 1：Fast-growing willow is crushed or is chipped；Step 2：The product that the step 1 obtains is impregnated in immersion liquid, the immersion liquid includes Na2O2、Na2S2O3, O3, cellulase and oxalic acid dihydrate；Step 3：The product filtering that the step 2 is obtained, adds water to grind the solid obtained after filtering；Step 4：Fiber is filtered out from the product that the step 3 obtains, and fiber is washed with water；Step 5：It is filtered in the product obtained to the step 4 to obtain the paper pulp of late stage process needs；A kind of fast-growing willow pulping process described herein, is not drained with water, realizes that whole process is pollution-free, can be greatly reduced or even be prevented substantially the pollutant emission in paper technology, environment is also protected while pollutant process cost is small；Resource utilization is high, and energy conservation and consumption reduction effects are apparent；Fast-growing willow fiber is made full use of, realizes resource circulation utilization.
Description
Technical field
This application involves slurrying field more particularly to a kind of fast-growing willow pulping process.
Background technology
In recent years, global pulp production is increased with annual 20000000 tons of rate with consumption figure, and market pulp is less than 1/
4, about 70,000,000 tons of world's market pulp volume of trade, net exporter is few in number.And China's Paper Industry Development is swift and violent recently,
The consumption maximum papermaking industry output of cellulose of state in 2014 reaches 115,000,000 tons, from the output of paper industry in 2010,
Consumption figure ranks first in the world.
For China's paper industry while high speed development, there is also more distinct issues：
First, quality raw materials notch is big, external dependence degree is high, and China's paper pulp heavy dependence import constrains China's papermaking
Industrial expansion, China's Forest Resources are few, not sufficient timber resources Paper Industry, and 70% wood pulp leans on import, into
The a quarter of the worlds Kou Liangzhan export availability, it is also desirable to which the waste paper that import accounts for world export total amount 55% is made to supplement
The wretched insufficiency of paper material.
Fast-growing willow, also referred to as bamboo willow, fast-growing bamboo willow are Salicaceae sallow, fast-growing willow high, adaptability as fiber content
, can be with dense planting compared with strong, cultivation area range spans are larger, the speed of growth is fast, yield is high, and before not adding bleaching, naturally white
Degree up to 60%, timber slurry yield is up to 95%, and material fibers are soft, it is wooden it is fine and closely woven uniformly, be superior commercial paper,
The preferred material of packing business and construction industry material, therefore, the development of bamboo willow and its fiber is with perspective well.And it existing makes
Paper or pulping process have the disadvantages that：
1) environmental pollution is serious, prevention and cure of pollution arduous task
The process structure and the structure of size and lower low-level technical equipment that traditional paper industry falls behind, determine
China's paper industry becomes main industrial pollution source.Traditional pulping process generally takes strong acid, highly basic, and high temperature is (more than 170
DEG C), high pressure be up to a few hours boiling, generate reluctant black liquor, environment caused seriously to pollute, especially non-wood fiber system
Waste liquid during making more is difficult to handle.
2) resource, energy-output ratio are big
From the point of view of slurry paper comprehensive energy consumption per ton and comprehensive water consume, advanced level is slurry paper comprehensive energy consumption 0.9- per ton in the world
1.2 tons of mark coals, comprehensive water withdrawal 35--50 tons (wood pulps), and China removes a small number of enterprises or part producing line reaches international and first intakes
Flat outer, most of 1.48 tons or so of enterprise's ton slurry paper comprehensive energy consumption average out to marks coals, and comprehensive water withdrawal is average still in 103 tons of left sides
A right high position.
3) construction investment is big, transformation is difficult
Currently, the investment situation of domestic traditional chemical pulping facility construction is：Every 10,000 tons of paper pulp reaches the hundred million yuan of left sides 1--1.5
Right fund.Traditional chemical pulping line, it is backward in technique, equip the outmoded slurrying corporation improvement pressure to various fibers compared with
Greatly.
The prior art to the pulp production exemplary applications of fast-growing willow material, does not compare in other wood fiber materials first
It to peel or strip off the skin on raw material etc. and processes and then be whittled into wood chip, ensure to cut the qualification rate of wood chip 85% or more, it is unqualified
Tablet is screened down processing, then qualified wood chip be fitted into high temperature resistant, high pressure container and have boiling in strong acid or lye
About 3 hours, a large amount of black liquor or red liquid are generated, being discharged when boiling terminates discharging largely has gas with foreign flavor, is unable to go back when timely processing
It can ferment and generate heavier noxious odor, pass through mechanical jordaning, massive laundering slurry, screening, pulp washing etc..
Therefore, it is badly in need of a kind of fast-growing willow pulping process, can solves that above-mentioned environmental pollution is big, equipment requirement is high, safety
Problem low, investment is huge, energy consumption is excessively high, resource utilization is low.
The project will in bamboo willow cellulose manufactures production overall process, realize not boiling, without black liquor, the cleaning side do not discharged
The popularization and application of method, this innovation achievement will create the roads Tiao Xin for the larger bamboo willow utilization of resources of China's reserves, will give me
The fiber utilization of state brings huge economic benefit and social benefit.
Invention content
The main purpose of the application is to provide a kind of fast-growing willow pulping process, to solve existing pulping process environmental pollution
Greatly, the problem that equipment requirement is high, safety is low, investment is huge, energy consumption is excessively high, resource utilization is low.
To solve the above problems, this application provides a kind of fast-growing willow pulping process, which is characterized in that a kind of fast-growing willow system
Sizing process, which is characterized in that include the following steps：
Step 1：Fast-growing willow is crushed or is chipped；
Step 2：The product that the step 1 obtains is impregnated in immersion liquid, the immersion liquid includes Na2O2、Na2S2O3, O3, fibre
The plain enzyme of dimension and oxalic acid dihydrate；
Step 3：The product filtering that the step 2 is obtained, adds water to grind the solid obtained after filtering；
Step 4：Fiber is filtered out from the product that the step 3 obtains, and by fiber water or regenerates water washing；
Step 5：It is filtered in the product obtained to the step 4 to obtain the paper pulp of late stage process needs.
Preferably, further include step 6：The product papermaking that the step 5 is isolated.
Preferably, the temperature of the fast-growing willow dipping is 70-100 degrees Celsius.
Preferably, the temperature of the fast-growing willow dipping is 70-90 degrees Celsius.
Preferably, the time of the fast-growing willow dipping is 50-90 minutes.
Preferably, the paper pulp is bleached before papermaking.
Preferably, which is characterized in that the Na2O2Mass fraction be 2.5-4.5%, the Na2S2O3Mass fraction
For 1%-3%, the O3Mass fraction be 0.1%-1.3%, the cellulase and oxalic acid dihydrate mass fraction
For 0.1%-2%.
Preferably, the Na2O2Mass fraction be 3-4%, the Na2S2O3Mass fraction be 1%-3%, the O3
Mass fraction be the mass fraction of 0.1%-0.8%, the cellulase and oxalic acid dihydrate be 0.1%-1%.
Preferably, the Na2O2Mass fraction be 3.5%, the Na2S2O3Mass fraction be 2%, the O3Matter
Measure that score is 0.5%, the mass fraction of the cellulase and oxalic acid dihydrate is 0.7%.
Compared with prior art, a kind of fast-growing willow pulping process described herein, has reached following effect：
1) a kind of fast-growing willow pulping process described herein, is not drained with water, realizes that whole process is pollution-free, Ke Yi great
It is big to reduce the pollutant emission even prevented substantially in paper technology, also protect ring while pollutant process cost is small
Border；
2) a kind of fast-growing willow pulping process described herein, resource utilization is high, and energy conservation and consumption reduction effects are apparent；
3) a kind of fast-growing willow pulping process described herein makes full use of fast-growing willow fiber, realizes resource circulation utilization,
And new process can make full use of fast-growing willow fiber as raw material, and can save a large amount of forest timber resources.
4) a kind of fast-growing willow pulping process described herein reduces cost of investment, shortens the construction period, novel technique
With the advantage that high in technological content, input-output ratio is high, the construction period is short, investment is quick.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 is the flow chart of fast-growing willow pulping process in the application.
Specific implementation mode
Some vocabulary has such as been used to censure specific components in specification and claim.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is used as the mode for distinguishing component, but is used as the criterion of differentiation with the difference of component functionally.Specification
Subsequent descriptions be implement the application better embodiment, so it is described description be for the purpose of the rule for illustrating the application,
It is not limited to scope of the present application.The protection domain of the application is when subject to appended claims institute defender.Certainly, originally
Pulping process described in invention cannot be only used on this raw material of fast-growing willow, using technique of the present invention for characteristic and speed
It should also be belonged to the scope of protection of the present invention on the similar raw material of raw willow.
As shown in the flow chart of fast-growing willow pulping process in Fig. 1 the application, a kind of fast-growing willow pulping process, including following step
Suddenly：
Step 1：Fast-growing willow is crushed or is chipped；
Step 2：The product that the step 1 obtains is impregnated in immersion liquid, the immersion liquid includes Na2O2、Na2S2O3, O3, fibre
The plain enzyme of dimension and oxalic acid dihydrate；
Step 3：The product filtering that the step 2 is obtained, adds water to grind the solid obtained after filtering；
Step 4：Fiber is filtered out from the product that the step 3 obtains, and by fiber water or regenerates water washing；
Step 5：It is filtered in the product obtained to the step 4 to obtain the paper pulp of late stage process needs.
Preferably, further include step 6：The product papermaking that the step 5 is isolated.
Fast-growing willow is crushed or is chipped；Ready fast-growing willow raw material is sent to wood chipping equipment or crusher, it before can be with
Carrying out decortication processing can not also be directly crushed with decortication, before entering next step, preferably by fast-growing willow fragment
It is screened, dedusting, impurity, dust is gone out.
The product that the step 1 obtains is impregnated in immersion liquid, can be impregnated in immersion liquid under normal pressure, the packet of the immersion liquid
It includes：Na2O2、Na2S2O3、O3, cellulase and oxalic acid dihydrate；The temperature of dipping is 70-90 degrees Celsius, all for generic container
The temperature that can be born, the lignin and hemicellulose of the fast-growing willow piece part after impregnation are modified, and fast-growing
Willow piece has been saturated, has softened and sub-wire.
The product filtering that the step 2 is obtained, by fast-growing willow defibrination；Fast-growing willow piece is filtered, the immersion liquid can be into
Row is reused, and the fast-growing willow piece is carried out mechanical jordaning.
The product that the step 3 is obtained screens washing, either fine since there is also the fibre bundles for having non-grinding in slurry
Metal, the grains of sand etc. of the raw material in mechanical flow, in grinding are tieed up, this road technological operation is purified by screening, remove impurity and thick fibre
Dimension, abjection remain on the immersion liquid in slurry；Screening refers to being sieved through the product that filter obtains the step 3 with fiber, according to different big
The production requirement of small, length paper pulp fiber being capable of spirit by screening process mesh number, the size of sieve pore of fiber sieve is arranged
The fiber of thickness, size needed for extraction living.
Because wood chip was impregnated with immersion liquid, a small amount of immersion liquid is contained in wood chip, grinding in the slurry of gained can also retain
The immersion liquid, and the length and width thickness standard of comparison of the fiber sifted out with sieve and uniformly, therefore be put into the slurry that sieve filters out
It washes, is then sifted out come the i.e. product of step thus in water or recycled water.It is left after water and first time screening slurry after washed
Water in the fiber taken away, can continue to filter according to demand, obtain thinner paper pulp fiber, remaining water cycle makes after filtering
With.
The isolated paper pulp of product that the step 4 is obtained, the paper pulp and washings is detached, washings can
With reclaiming circulating and recovering；The separation method includes but not limited to vacuum filtration, standing separation etc..
Direct marketing after the paper pulp that the late stage process needs can be concentrated, can also enter next step papermaking.
Its mode filtered and the control of the moisture of filtering can be determined by the needs of late stage process.
The temperature of the fast-growing willow dipping is 70-100 degrees Celsius.
Preferably, the temperature of the fast-growing willow dipping is 70-90 degrees Celsius.
The time of the fast-growing willow dipping is 50-90 minutes.
The paper pulp can also be bleached before papermaking according to needs.
The Na2O2Mass fraction be 2.5-4.5%, the Na2S2O3Mass fraction be 1%-3%, the O3's
Mass fraction is that the mass fraction of 0.1%-1.3%, the cellulase and oxalic acid dihydrate are 0.1%-2%.
Preferably, the Na2O2Mass fraction be 3-4%, the Na2S2O3Mass fraction be 1%-3%, the O3
Mass fraction be the mass fraction of 0.1%-0.8%, the cellulase and oxalic acid dihydrate be 0.1%-1%.
Preferably, the Na2O2Mass fraction be 3.5%, the Na2S2O3Mass fraction be 2%, the O3Matter
Measure that score is 0.5%, the mass fraction of the cellulase and oxalic acid dihydrate is 0.7%.
Fast-growing willow pulping process provided by the invention is not drained with water, and fiber manchining feature process is pollution-free, traditional slurrying
Technique is to generate intractable black liquor using highly basic, strong acid high temperature, autoclaving, cause seriously to pollute to environment, especially non-wood
Waste liquid in fiber manufacture process is more difficult to handle, and the production of fast-growing willow (bamboo willow) fiber cleaning is that impregnating agent is right under normal pressure
Fiber is impregnated and is softened, and does not use highly basic and strong acid, therefore generate without black liquor.
Meanwhile after the waste liquid of all different production workshop section discharges or waste water are according to design requirement or segmented processing,
Regeneration cycle reuse realizes that whole process is pollution-free, does not discharge, protect environment.
Fast-growing willow pulping process provided by the invention, resource utilization is high, and energy conservation and consumption reduction effects are apparent, bamboo willow fiber true qualities
Comprehensive obtained rate is up to 90%；Cellulose per ton is made within only 10 tons of water consumption, and water-saving 90%；Comprehensive energy consumption 217kg marks coal, with
Tradition is compared to 30% or more saving.
Fast-growing willow pulping process provided by the invention makes full use of bamboo willow fiber, realizes resource circulation utilization, new process energy
It enough makes full use of bamboo willow fiber as raw material, and a large amount of forest timber resources can be saved.
Fast-growing willow, i.e. bamboo willow fibre pulp be to belong to medium-length fibre wood-fibred paper pulp, by as China's next period it is new
One of fast-growing paper-pulp forest material principal item will be the most potential economic forest of China pulping and paper-making woods.Following considerably long
In period, paper industry still can be most fast one of the industry of every profession and trade development speedup.Especially the papermaking of brown stock most
Ecosystem, including：The industry such as unbleached kraft cardboard, food packaging, primary colors house paper for daily use etc. have more extensive market
Value and potentiality.
Fast-growing willow pulping process provided by the invention reduces cost of investment, shortens the construction period, and novel technique has section
The advantage that skill content is high, input-output ratio is high, the construction period is short, investment is quick.It is newly-built to produce 100000 tons of cellulose papermaking phases per year
When in conventional investment 30%.
If being expanded for traditional paper mill, being reconstructed, the construction period using this new process production line be only 100 days extremely
It 150 days, takes effect especially fast.Investment can about be withdrawn within 2 years short periods.
Embodiment one
A kind of fast-growing willow pulping process, including：
Fast-growing willow is crushed or is chipped；Ready fast-growing willow raw material is sent to crusher, before entering next step,
Fast-growing willow fragment is screened, dedusting, impurity, dust are gone out.
Normal pressure is impregnated in immersion liquid, and the immersion liquid includes：Na2O2、Na2S2O3、O3, cellulase and oxalic acid two is hydrated
Object；The temperature of dipping is 70-90 degrees Celsius, and dip time is 50-90 minutes, and the fast-growing willow piece after impregnation is molten
The lignin and hemicellulose of part are gone out, and fast-growing willow piece has been saturated, has softened and sub-wire.
Filtering, the immersion liquid may be repeated use, and the fast-growing willow piece is carried out mechanical jordaning.
Screening washing, since there is also the fibre bundle for having non-grinding either fibrous raw materials in machinery streaming, grinding in slurry
In metal, the grains of sand etc., this road technological operation is purified by screening, removes impurity and crude fibre, cleans the leaching remained in slurry
Liquid；
The isolated paper pulp of slurries, the paper pulp and washings are detached, and washings can be recycled back to reclaiming
With；Direct marketing after the paper pulp can be concentrated can also enter next step papermaking.
The fast-growing willow pulping process provided by above-described embodiment one starches cost in slurry yield, land area, investment and ton
The contrast table of aspect and Chinese tradition soda pulping process is as shown in table 1 below：
1 fast-growing willow pulping process effect of table
In addition, as shown in table 2, different pulping process pollutant emission situation comparisons, by discharging standards GB3544-
2008 compare.
2 fast-growing willow pulping process pollutant emission situation of table
| Project | Fast-growing willow pulping process | Traditional acid-base method production |
| Ton pulp waste water discharge capacity (m3/t) | 0 | 80 |
| Ton slurry CODcr discharge capacitys (kg/t) | 0 | 16 |
| Ton slurry BOD5Discharge capacity (kg/t) | 0 | 4 |
| Ton slurry SS discharge capacitys (kg/t) | 0 | 5.6 |
As shown above, using fast-growing willow pulping process provided in this embodiment, 100,000 tons of fast-growing willow celluloses, year are produced per year
Can emission reduction waste water and amount of pollutant be：
Year reduces quantity of wastewater effluent：100000*80 (ton)=8,000,000 ton；
Year reduces CODcrDischarge capacity：(100000*0.016 ton)=1600 ton；
Year reduces BOD5Discharge capacity：(100000*0.004 ton)=400 ton；
Year reduces SS discharge capacitys：(100000*0.0056 ton)=560 ton；
Therefore, using fast-growing willow pulping process provided in this embodiment, it can greatly reduce or even prevent paper maker substantially
Pollutant emission in skill.
At the energy, resource-effective aspect, fast-growing willow pulping process provided in this embodiment in cellulose extraction process not
Boiling is not pressurized, and is completed production under normal pressure, is advantageously reduced power consumption, coal consumption, has significant energy-saving effect；Furthermore with
Circulating and recovering water system greatly reduces ton slurry water consumption.The comprehensive energy consumption of this pulping technique, resource consumption situation such as 3 institute of table
Show, comprehensive energy consumption situation is as shown in table 4 in China's traditional soda pulp preparing process：
3 fast-growing willow pulping process comprehensive energy consumption situation of table
| Serial number | Energy consumption | Signature coal/kg | Ton slurry energy consumption (signature coal)/kg |
| 1 | Water | 0.257 | 7m3/t cellulose * 0.257kg/m3=1.779kg |
| 2 | Electricity | 0.404 | 325kwh/t starches * 0.404/kwh=131.3kg |
| 3 | Vapour | 129 | 0.65t/t*129kg/t=83.85kg |
| 4 | Ton slurry comprehensive energy consumption | 1.779+131.3+83.85=217kg | |
| 5 | Fibrous raw material consumption | 1.27--1.5 ton |
Comprehensive energy consumption situation in 4 traditional soda pulp preparing process of table
| Serial number | Energy consumption | Signature coal/kg | Ton slurry energy consumption (signature coal)/kg |
| 1 | Water | 0.257 | 100m3/t starches * 0.257kg/m3=25.7kg |
| 2 | Electricity | 0.404 | 650kwh/t starches * 0.404kg/kwh=262.6kg |
| 3 | Vapour | 129 | 2.2t/t starches * 129kg/t=283.8kg |
| 4 | Ton slurry comprehensive energy consumption | 25.7+262.6+283.8=572kg | |
| 5 | Fibrous raw material consumption | 2.5----3 ton |
Consolidated statement 3, table 4 are compared (for producing 100000 tons of paper pulp production lines per year), fast-growing willow provided in this embodiment
Pulping process year, synthesis energy saving amount was：Mark coal in 100000 ton=35500 ton (ton slurry) * (0.572-0.217)；It is former that year saves fiber
Expect resource：100000 ton=120,000 ton (ton slurry) * (2.7-1.5)；Annual water-saving amount is：100000 ton=93 (ton slurry) * (100-7)
Ten thousand tons.
Signature coal described above refers to equivalent standard coal combustion heat magnitude.
Embodiment two
Use the paper technology of fast-growing willow paper pulp as described above, which is characterized in that further include step 6：It will be described
Paper pulp papermaking in step 5.
Compared with prior art, a kind of fast-growing willow pulping process described herein, has reached following effect：
1) a kind of fast-growing willow pulping process described herein, is not drained with water, realizes that whole process is pollution-free, Ke Yi great
It is big to reduce the pollutant emission even prevented substantially in paper technology, also protect ring while pollutant process cost is small
Border；
2) a kind of fast-growing willow pulping process described herein, resource utilization is high, and energy conservation and consumption reduction effects are apparent；
3) a kind of fast-growing willow pulping process described herein makes full use of fast-growing willow fiber, realizes resource circulation utilization,
And new process can make full use of fast-growing willow fiber as raw material, and can save a large amount of forest timber resources.
4) a kind of fast-growing willow pulping process described herein reduces cost of investment, shortens the construction period, novel technique
With the advantage that high in technological content, input-output ratio is high, the construction period is short, investment is quick.
Above is only an example of the present application, it is not intended to limit this application, for those skilled in the art
For member, the application can have various modifications and variations.Any modification made by within the spirit and principles of this application,
Equivalent replacement, improvement etc., should be included within the scope of claims hereof.
Claims (8)
1. a kind of fast-growing willow pulping process, which is characterized in that include the following steps：
Step 1：Fast-growing willow is crushed or is chipped；
Step 2：The product that the step 1 obtains is impregnated in immersion liquid, the immersion liquid includes Na2O2、Na2S2O3、O3, cellulose
Enzyme and oxalic acid dihydrate；The immersion liquid can be reused；
Step 3：The product filtering that the step 2 is obtained, adds water to grind the solid obtained after filtering, remaining water after filtering
It recycles；
Step 4：Filter out fiber from the product that the step 3 obtains, and the fiber be washed with water, it is washed after water follow
Ring utilizes；
Step 5：The product that the step 4 obtains is filtered to obtain the paper pulp of late stage process needs；By the paper pulp
It is detached with washings, the washings reclaiming circulating and recovering；
The temperature that fast-growing willow impregnates in the step 2 is 70-100 degrees Celsius.
2. fast-growing willow pulping process as described in claim 1, which is characterized in that the temperature that fast-growing willow impregnates in the step 2
It is 70-90 degrees Celsius.
3. fast-growing willow pulping process as described in claim 1, which is characterized in that the time that fast-growing willow impregnates in the step 2
It is 50-90 minutes.
4. fast-growing willow pulping process as described in claim 1, which is characterized in that further include by the paper pulp in the step 5
It is bleached.
5. fast-growing willow pulping process as claimed in claim 3, which is characterized in that in the immersion liquid, Na2O2Mass fraction be
2.5-4.5%, Na2S2O3Mass fraction be 1%-3%, O3Mass fraction be 0.1%-1.3%, cellulase and oxalic acid
The mass fraction of dihydrate is 0.1%-2%.
6. fast-growing willow pulping process as claimed in claim 5, which is characterized in that in the immersion liquid, Na2O2Mass fraction be
3-4%, Na2S2O3Mass fraction be 1%-3%, O3Mass fraction be two water of 0.1%-0.8%, cellulase and oxalic acid
The mass fraction for closing object is 0.1%-1%.
7. fast-growing willow pulping process as claimed in claim 6, which is characterized in that in the immersion liquid, Na2O2Mass fraction be
3.5%, Na2S2O3Mass fraction be 2%, O3Mass fraction be the 0.5%, quality of cellulase and oxalic acid dihydrate
Score is 0.7%.
8. using the paper technology of the fast-growing willow pulping process as described in any claim in claim 1-7, feature exists
In further including step 6：By the paper pulp papermaking in the step 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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