CN108824066A - A kind of low alkaline consumption pulping process of papermaking - Google Patents
A kind of low alkaline consumption pulping process of papermaking Download PDFInfo
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- CN108824066A CN108824066A CN201810759751.XA CN201810759751A CN108824066A CN 108824066 A CN108824066 A CN 108824066A CN 201810759751 A CN201810759751 A CN 201810759751A CN 108824066 A CN108824066 A CN 108824066A
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- raw material
- boiling
- pulping
- pulping process
- papermaking
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
-
- 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
- D21C3/026—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of O2, e.g. air
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a kind of low alkaline consumption pulping process of papermaking, belong to pulping technology for paper-making field, including material preparation, immersion, filtering, squeezing, oxygenation, boiling, blowing process, wherein first impregnated, filtered, squeezed before boiling.The chemical sizwe of preparation has plant fiber damage small, and boiling alkaline consumption substantially reduces, and production cost reduces by 20% or so.
Description
Technical field
The present invention discloses a kind of low alkaline consumption pulping process of papermaking, belongs to pulping technique field in paper industry, especially relates to
And pulping process in paper-making process.
Background technique
Currently, paper industry has the history of centuries, China using timber or grass fiber as the paper mill of raw material throughout
All parts of the country, wherein ten thousand tons or more paper plants account for 70% or more, but the progress of paper technology is very slowly.Traditional chemical pulping
Technique, such as soda processes, sulfate process, such technique all have low, damage fibre strength of high temperature, high pressure, high energy consumption, yield etc.
Disadvantage, not only high production cost, also has some potential safety problems, can also generate a large amount of black liquor in process of production, has viscous
The features such as degree is high, content of organics is low, silicone content is high, calorific value is low, causes to be difficult to effectively to be recycled, causes serious environment
Pollution.In addition it also discharges largely to people, animal and the harmful wastewater and sewage of crops, suspended matter and organic substance concentration in water
Height, color is deep, and acid or alkalinity are big, and biodegradability is poor, not only wastes water, sour or alkali, is lost a large amount of plant fibers, and give environment
Serious pollution especially is brought to underground water.For this purpose, a kind of low damage pulping technique of low alkaline consumption is considered as solving such ask
One of effective way of topic.
China's cane sugar factory utilizes the byproduct of Closed Circulation in Sugar Production mostly -- alcohol produced from molasses.It is produced in alcohol production process
Raw waste -- useless mash is a kind of coloration high (dark brown), temperature high (95~98 DEG C), pH low (4.5 or so), pollution
The highly concentrated acidic organic wastewater of object is primary pollution source of the sugar refinery to water environment.Every 1 ton of alcohol of production discharges 13~15 tons and gives up
Liquid, is the primary pollution source in sugar refinery, and characteristic is as follows：
1, pollutional load is high, belongs to high concentration organic acidity waste water, 8~120,000 mg/L of chemical oxygen consumption (COC) (CODcr), biological oxygen consumption
(BOD5) 4~60,000 mg/L, one is produced daily 20 tons of alcohol workshop, and the contaminated wastewater load of discharge is equivalent to 400,000 people
The pollutional load of the sanitary wastewater of mouth city discharge.It is such as untreated, after discharging it into water body, water hypoxia will be caused, make water
Biological death also results in water quality deterioration when serious.
2, have 10~13% solid content in molasses alcohol waste mash, wherein 70% is organic matter, such as sugared part, protein,
Amino acid, vitamin, organic acid etc., remaining 30% is ash, such as nitrogen phosphorus, potassium, calcium, U.S. inorganic salts, these are all animals and plants
Nutriment, be valuable resource.
3, molasses alcohol waste mash pH 4.0~5.0, containing sulfate radical, chlorate anions and organic acid, to carbon steel equipment, pipeline
There is corrosiveness.
4,2500~5000 times of coloration, are a kind of amino acid and glycogenetic compound, according to data and a large number of experiments show that,
All it is difficult to be decolourized with conventional method.Environment is protected, preventing and remedying pollution is the important component of the Implement of sustainable development strategy,
With the rapid development that sugar industry produces, " three wastes " in sugar refinery, especially alcohol effluent is on the rise to water resource pollution.
For this purpose, the present invention is on the basis of background above, using sugar refinery organic acidity waste water as pulping raw material pretreatment fluid,
Alkali object is consumed with the resin, pectin, acid soluble lignin etc. that dissolve raw material surface and surface layer, the useless mash in sugar refinery had not only been utilized, but also reduce system
Quantity of alkali consumption is starched, further reduces slurrying pollution again.Present invention process reasonable, simple to operate, technique preparation
Paper making raw material easy cooking, alkali consumption it is small, slurrying is at low cost；Pulping waste liquor is less than convenient for processing, the waste water COD index of discharge
300, for coloration less than 200, environmental pollution is small, can produce popularization in enterprises in pulp and paper industry, environment protection significance is great.
Summary of the invention
The present invention provides one kind and makes for prior art alkali consumption is larger, fibre damage is larger, the deficiency of higher cost
The low alkaline consumption pulping process of paper, to solve the above problems.
In order to achieve the above objectives, the present invention is achieved by the following technical solutions：
A kind of low alkaline consumption pulping process of papermaking, including material preparation, immersion, filtering, squeezing, oxygenation, boiling, blowing process.
Its pulping process comprises the steps of：
（1）First pulping raw material is cut off and is stocked up；
（2）By step 1）In the raw material got ready（Opposite over dry raw material）In press solid-to-liquid ratio 1:3~4, which are added useless mash, impregnates reaction 24
~48h；
（3）By step 2）Raw material after middle immersion is filtered by flase floor, filters soak；
（4）By step 3）In filter the raw material after soak and squeezed by squeezer and remove useless mash with further；
（5）By step 4）15~17% are added in raw material after squeezing（Opposite over dry raw material）Lye, oxygen press 0.6~0.9MPa to fill
Oxygen reacts 1~2h, liquor ratio 1:4~5；
（6）By step 5）Middle end of reaction material cooking, 100~115 DEG C of boiling temperature, 50~70 min of boiling heating-up time,
100~150 min of soaking time；
（7）Blowing is after boiling up to slurry.
Preferably, above-mentioned steps（4）Middle raw material moisture content after squeezing is 30~50%.
The present invention use be added in the feed sugar refinery give up mash impregnate with dissolve the resin on raw material surface and surface layer, pectin,
Acid soluble lignin etc. consumes alkali object, the useless mash of sugar refinery organic acidity had not only been utilized, but also reduce slurrying quantity of alkali consumption, and had further reduced again
Slurrying pollution.Chemical pulp prepared by the present invention has good strength character, while having saved 20%~40% alkali charge, significantly
Boiling alkaline consumption is reduced, production cost reduces by 20% or so.
Present invention process reasonable, simple to operate, the technique slurrying is at low cost.
The present invention is to reduce cost, and paper making raw material is pre-processed, and raw material uses immersion, filtering, squeezing, oxygenation, steaming
It boils, blowing process, wherein impregnating 24~48h of reaction, is added 15~17% in raw material（Opposite over dry raw material）Lye.
Paper making raw material of the present invention is wheat straw, straw, corn stover, reed, bamboo, ramie, flax, bluish dogbane, sword
One of fiber crops, bagasse, Chinese alpine rush, Eupatorium adenophorum, banana stalk, Chinese holly bark.
Due to the adoption of the above technical scheme, the present invention preferably realizes goal of the invention.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Embodiment 1
A kind of low alkaline consumption pulping process of papermaking, the paper making raw material be wheat straw, straw, corn stover, reed, bamboo, ramie,
One of flax, bluish dogbane, sisal hemp, bagasse, Chinese alpine rush, Eupatorium adenophorum, banana stalk, Chinese holly bark（The present embodiment is wheat straw）.
Its pulping process comprises the steps of：
（1）Wheat straw is ground into pulverizer the filament of 3~5cm long first；
（2）By step 1）In the raw material got ready（Opposite over dry raw material）In press solid-to-liquid ratio 1:3, which are added useless mash, impregnates reaction for 24 hours；
（3）By step 2）Raw material after middle immersion is filtered by flase floor, filters soak；
（4）By step 3）In filter the raw material after soak and squeezed by squeezer and remove useless mash with further, make original
Expect moisture content < 40%；
（5）By step 4）15% is added in raw material after squeezing（Opposite over dry raw material）Lye（100g/L sodium hydroxide）, oxygen pressure
1h, liquor ratio 1 are reacted after 0.6MPa oxygenation:4；
（6）By step 5）Middle end of reaction material cooking, boiling temperature are 100 DEG C, 50 min of heating-up time, soaking time 100
min；
（7）Blowing is after boiling up to slurry.
After boiling, pot is put, the black liquor in slurry is squeezed out with screw extruder, then slurry is washed, it is to be washed
Paper pulp is dried after waste liquid out is colourless, carries out each Indexs measure.
Using paper pulp made from above-mentioned technique, wherein paper pulp yield is 51.56%, and thick slag rate is 0.36, residual alkali：5.8, K values
（Permanganate number）9.8,0.75 ㎜ of average fiber length, after aoxidizing chlorine bleaching, pulp brightness（ISO）It is 89.6%, viscosity is
872 mL/g。
Embodiment 2
A kind of low alkaline consumption pulping process of papermaking, the paper making raw material be wheat straw, straw, corn stover, reed, bamboo, ramie,
One of flax, bluish dogbane, sisal hemp, bagasse, Chinese alpine rush, Eupatorium adenophorum, banana stalk, Chinese holly bark（The present embodiment is ramie）.
（1）Ramie is first ground into pulverizer the filament of 2~4cm long；
（2）By step 1）In the raw material got ready（Opposite over dry raw material）In press solid-to-liquid ratio 1:4, which are added useless mash, impregnates reaction 48h；
（3）By step 2）Raw material after middle immersion is filtered by flase floor, filters soak；
（4）By step 3）In filter the raw material after soak and squeezed by squeezer and remove useless mash with further, make original
Expect moisture content < 50%；
（5）By step 4）17% is added in raw material after squeezing（Opposite over dry raw material）Lye（100g/L sodium hydroxide）, oxygen pressure
0.9MPa oxygenic reaction 2h, liquor ratio 1: 5；
（6）By step 5）Middle end of reaction material cooking, boiling temperature are 115 DEG C, 70 min of heating-up time, soaking time 150
min；
（7）Blowing is after boiling up to slurry.
After boiling, pot is put, the black liquor in slurry is squeezed out with screw extruder, then slurry is washed, it is to be washed
Paper pulp is dried after waste liquid out is colourless, carries out each Indexs measure.
Using paper pulp made from above-mentioned technique, wherein paper pulp yield is 55.36%, and thick slag rate is 0.35, residual alkali：6.18 K
Value（Permanganate number）11.5,0.86 ㎜ of average fiber length, after aoxidizing chlorine bleaching, pulp brightness（ISO）It is 80.8%, viscosity
For 1056 mL/g.
Embodiment 3
A kind of low alkaline consumption pulping process of papermaking, the paper making raw material be wheat straw, straw, corn stover, reed, bamboo, ramie,
One of flax, bluish dogbane, sisal hemp, bagasse, Chinese alpine rush, Eupatorium adenophorum, banana stalk, Chinese holly bark（The present embodiment is purple stem pool
It is blue）.
（1）Eupatorium adenophorum is first ground into chaffcutter the filament of 2~4cm long；
（2）By step 1）In the raw material got ready（Opposite over dry raw material）In press solid-to-liquid ratio 1:4, which are added useless mash, impregnates reaction 36h；
（3）By step 2）Raw material after middle immersion is filtered by flase floor, filters soak；
（4）By step 3）In filter the raw material after soak and squeezed by squeezer and remove useless mash with further, make original
Expect moisture content < 30%；
（5）By step 4）15% is added in raw material after squeezing（Opposite over dry raw material）Lye（100g/L potassium hydroxide）, oxygen pressure 0.
8MPa oxygenic reaction 1h, liquor ratio 1:4；
（6）By step 5）Middle end of reaction material cooking, boiling temperature are 100 DEG C, 50 min of heating-up time, soaking time
100min；
（7）Blowing is after boiling up to slurry.
After boiling, pot is put, the black liquor in slurry is squeezed out with screw extruder, then slurry is washed, it is to be washed
Paper pulp is dried after waste liquid out is colourless, carries out each Indexs measure.
Using paper pulp made from above-mentioned technique, wherein paper pulp yield is 53.10%, and thick slag rate is 0.28, residual alkali：6.65 K
Value（Permanganate number）10.5,0.78 ㎜ of average fiber length, after aoxidizing chlorine bleaching, pulp brightness（ISO）It is 83.3%, viscosity
For 898 mL/g.
Claims (3)
1. the low alkaline consumption pulping process of a kind of papermaking, it is characterized in that the pulping process includes material preparation, immersion, filtering, pressure
Squeezing, oxygenation, boiling, blowing process；
Its pulping process comprises the steps of：
（1）First pulping raw material is cut off and is stocked up；
（2）By step 1）In the raw material got ready（Opposite over dry raw material）In press solid-to-liquid ratio 1:3~4, which are added useless mash, impregnates reaction 24
~48h；
（3）By step 2）Raw material after middle immersion is filtered by flase floor, filters soak；
（4）By step 3）In filter the raw material after soak and squeezed by squeezer and remove useless mash with further, make original
Expect moisture content 30~50%；
（5）By step 4）15~17% are added in raw material after squeezing（Opposite over dry raw material）Lye, oxygen are pressed 0.6~0.9MPa, are filled
Oxygen reacts 1~2h, liquor ratio 1:4~5；
（6）By step 5）Middle end of reaction material cooking, 100~115 DEG C of boiling temperature, 50~70 min of boiling heating-up time,
100~150 min of soaking time；
（7）Blowing is after boiling up to slurry.
2. the low alkaline consumption pulping process of a kind of papermaking according to claim 1, it is characterized in that the raw material soaking is used in original
The useless mash in sugar refinery is added in material to impregnate.
3. the low alkaline consumption pulping process of a kind of papermaking according to claim 1, it is characterized in that the pulping and paper-making raw material is wheat
Grass, straw, corn stover, reed, bamboo, ramie, flax, bluish dogbane, sisal hemp, bagasse, Chinese alpine rush, Eupatorium adenophorum, banana stalk,
One of Chinese holly bark.
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| CN201810759751.XA CN108824066A (en) | 2018-07-11 | 2018-07-11 | A kind of low alkaline consumption pulping process of papermaking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810759751.XA CN108824066A (en) | 2018-07-11 | 2018-07-11 | A kind of low alkaline consumption pulping process of papermaking |
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Citations (5)
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|---|---|---|---|---|
| CN101126101A (en) * | 2006-08-18 | 2008-02-20 | Bapp酶工程有限公司 | Brewing method for alcohol |
| CN101265673A (en) * | 2008-03-31 | 2008-09-17 | 陕西科技大学 | Biological paper making and pulping method |
| CN101407828A (en) * | 2008-11-14 | 2009-04-15 | 广西大学 | High temperature alcohol fermentation method |
| CN103540581A (en) * | 2013-10-19 | 2014-01-29 | 沅江浣溪沙酶技术有限公司 | Production method and applications of compound enzyme liquid used in papermaking and pulping process of wheat straws and rice straws |
| CN106222153A (en) * | 2016-08-02 | 2016-12-14 | 长兴锦龙纸业有限公司 | A kind of employing straw slurry complex enzyme liquid and application thereof |
-
2018
- 2018-07-11 CN CN201810759751.XA patent/CN108824066A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126101A (en) * | 2006-08-18 | 2008-02-20 | Bapp酶工程有限公司 | Brewing method for alcohol |
| CN101265673A (en) * | 2008-03-31 | 2008-09-17 | 陕西科技大学 | Biological paper making and pulping method |
| CN101407828A (en) * | 2008-11-14 | 2009-04-15 | 广西大学 | High temperature alcohol fermentation method |
| CN103540581A (en) * | 2013-10-19 | 2014-01-29 | 沅江浣溪沙酶技术有限公司 | Production method and applications of compound enzyme liquid used in papermaking and pulping process of wheat straws and rice straws |
| CN106222153A (en) * | 2016-08-02 | 2016-12-14 | 长兴锦龙纸业有限公司 | A kind of employing straw slurry complex enzyme liquid and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| （英）特纳（TURNER，B.）著、吴佩琮译: "《家酿葡萄酒和啤酒》", 31 March 1986, 乌鲁木齐：新疆人民出版社 * |
| 詹怀宇主编: "《制浆原理与工程 第3版》", 31 January 2010, 北京：中国轻工业出版社 * |
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Application publication date: 20181116 |