CN107604731A - A kind of bleaching process in stalk fibre extraction process - Google Patents
A kind of bleaching process in stalk fibre extraction process Download PDFInfo
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- CN107604731A CN107604731A CN201711064902.1A CN201711064902A CN107604731A CN 107604731 A CN107604731 A CN 107604731A CN 201711064902 A CN201711064902 A CN 201711064902A CN 107604731 A CN107604731 A CN 107604731A
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Abstract
The invention provides the bleaching process in a kind of stalk fibre extraction process, pending stalk is crushing, after immersion, successively by thread rolling machine, the first high-density paste mill, the second high-density paste mill, slurry tank, low dense fiberizer, stalk fibre is made by rinsing afterwards；The hydrogenperoxide steam generator of identical mass fraction is passed through into thread rolling machine, the first high-density paste mill, the second high-density paste mill respectively, being passed through ozone into low dense fiberizer is bleached, and fiber protection agent is added into slurry tank, and carry out boiling.Bleaching process in stalk fibre extraction process of the present invention, using hydrogen peroxide to fiber bleached, is then passed through ozone again, improves the stability of bleaching, and bleaching process step is few, and the destruction to fiber is small, and bleaching efficiency is high.
Description
Technical field
The invention belongs to stalk fibre extraction process field, more particularly, to the bleaching in a kind of stalk fibre extraction process
Technique.
Background technology
In the method for China's system bleaching stalk straw pulp, the bleaching side based on chlorine or chlorine dioxide has mainly been used
Method, caused substantial amounts of AOX amounts are big in its production, and processing is difficult, containing a series of including a large amount of dioxin in bleaching effluent
Organochlorine can cause huge harm to the health and environment of the mankind.Rice wheat straw straw pulp production technology traditional at present, it is main
Temperature is set to reach more than 100 degree the mechanical force that straw uses if employing high-density paste mill.By hypochlorite bleaching,
It is most of to use two sections of bleachings of hypochlorite, individually using chlorination, alkali density, the process of hypochlorite bleaching or chlorination, mistake
Hydrogen oxide strengthens the bleaching process such as alkali density, hypochlorite tri-stage bleaching and technology.Wherein totally applied chlorine is up to 8-12%, not only
The loss of bleaching slurry is big, and brightness reversion is serious, low intensity, and seriously polluted, and the chlorine bleach produced pollution is quite serious.
The shortcomings of power consumption is high, and pollutant generation load is big, and process link is more, and consumption of raw materials is big be present in traditional method for bleaching,
And using chlorine drift and hypochlorite bleaching stalk fibre can be caused to bleach easy yellowing and bleach stability by considerable damage
The defects of poor.It is larger in one section of bleaching technology application field usage amount of hydrogen peroxide, it is necessary to the cleaning of a large amount of clean waters.One section of drift
The concentration of white method hydrogen peroxide is high, higher to fibre damage rate, wherein a large amount of raw material are wasted.
In energy-saving and emission-reduction, cleanly production, recycling economy and the today for mentioning development strategy height, develop low energy consumption,
Low stain, efficiently, rice wheat bleaching straw pulp processed is cleaned to replace the raw material of wood pulp of reduction increasingly be trend of the times.Therefore, it is necessary to
Lifting is improved to the technology of stalk fibre bleached pulp, reduces energy consumption and pollution, realizes efficient, the straw pulp production of cleaning,
Obtain the rice straw pulp of high-quality.
The content of the invention
In view of this, the present invention is directed to propose a kind of bleaching process in stalk fibre extraction process, solves conventional slurry
The problem of Substances Pollution environment that material bleaching is unstable, bleaching uses.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of bleaching process in stalk fibre extraction process, pending stalk is crushing, after immersion, successively by rubbing with the hands
Silk machine, the first high-density paste mill, the second high-density paste mill, slurry tank, low dense fiberizer, it is fine that stalk is made by rinsing afterwards
Dimension；
The peroxidating of identical mass fraction is passed through into thread rolling machine, the first high-density paste mill, the second high-density paste mill respectively
Hydrogen solution, into low dense fiberizer being passed through ozone is bleached, and fiber protection agent is added into slurry tank, and carry out boiling.
Preferably, the quality of the hydrogenperoxide steam generator used in thread rolling machine, the first high-density paste mill, the second high-density paste mill
The mass ratio of sum and pending stalk is 0.17~0.2:1.
Preferably, into thread rolling machine, the first high-density paste mill, the second high-density paste mill hydrogenperoxide steam generator volume score
Wei 2:1:1.
Preferably, ozone is passed through with 0.2~3kg/min speed according in pending stalk per ton in low dense fiberizer,
It is passed through 15~30min of time.
Preferably, the mass ratio of fiber protection agent and pending stalk is 1:100~150.
Preferably, the mass fraction of hydrogenperoxide steam generator is 24.5%.
Preferably, fiber protection agent is water soluble oxidized Tissuemat E, and the density of water soluble oxidized Tissuemat E is
0.75g/ml。
Using three sections of hydrogen peroxide bleachings, added in thread rolling machine, the first high-density paste mill, the second high-density paste mill
Hydrogen oxide, while hydrogen peroxide is added using three sections in HTHP caused by each section of mechanism, promote to react
Speed lifts hydrogen peroxide, and the reaction with fiber is more comprehensively.
Relative to prior art, the bleaching process in stalk fibre extraction process of the present invention has the advantage that：
Bleaching process in stalk fibre extraction process of the present invention, using hydrogen peroxide to fiber bleached, then
Ozone is passed through again, improves the stability of bleaching, and bleaching process step is few, the destruction to fiber is small, and bleaching efficiency is high.
Embodiment
The present invention is described in detail with reference to embodiment.
Embodiment 1
1 ton of pending stalk is weighed, pending stalk is crushed first, is cut into a bit of stalk section,
Rubbed subsequently into thread rolling machine, preliminary pretreatment is done to pending stalk, and the debris such as disintegrating slag are removed.
Then the stalk section after rubbing is put into saturation tank, infiltrated with weakly alkaline immersion fluid.Stalk after infiltration
Section, which is placed into kneading machine, is rubbed, and during rubbing, weakly alkaline immersion fluid infiltration is constantly added, by rubbing
The stalk section after infiltration is softened after process, while is passed through hydrogenperoxide steam generator 80kg, the straw after rubbing
Stalk section is entered back into the first high-density paste mill, the second high-density paste mill and carries out defibrator process, and peroxide is passed through into the first high-density paste mill
Change hydrogen solution 40kg, hydrogenperoxide steam generator 40kg is passed through into the second high-density paste mill, by adding hydrogenperoxide steam generator three times,
Slurry is bleached.By said process, realize fiber and lignin, pectin etc. and separate.
By to thread rolling machine, the first high-density paste mill, the second high-density paste mill add hydrogenperoxide steam generator, whiteness respectively by
40 degree are promoted to 60 degree, 60 degree and are promoted to 70 degree；70 degree are promoted to 80 degree.
Subsequently into slurry tank, boiling is passed through in slurry tank, softens slurry, while 10kg density is added into slurry tank
For 0.75g/ml water soluble oxidized Tissuemat E, the slurry after boiling enters low dense fiberizer, carries out further
Fine grinding, ozone is passed through with 1kg/min speed in low dense fiberizer, is passed through time 20min.After the depth bleaching of ozone,
Whiteness is promoted to 90 degree by 80 degree before, then rinses and stalk fibre is made.
The mass fraction of hydrogenperoxide steam generator is 24.5%.
Embodiment 2
1 ton of pending stalk is weighed, pending stalk is crushed first, is cut into a bit of stalk section,
Rubbed subsequently into thread rolling machine, preliminary pretreatment is done to pending stalk, and the debris such as disintegrating slag are removed.
Then the stalk section after rubbing is put into saturation tank, infiltrated with weakly alkaline immersion fluid.Stalk after infiltration
Section, which is placed into kneading machine, is rubbed, and during rubbing, weakly alkaline immersion fluid infiltration is constantly added, by rubbing
The stalk section after infiltration is softened after process, while is passed through hydrogenperoxide steam generator 100kg, the straw after rubbing
Stalk section is entered back into the first high-density paste mill, the second high-density paste mill and carries out defibrator process, and peroxide is passed through into the first high-density paste mill
Change hydrogen solution 50kg, hydrogenperoxide steam generator 50kg is passed through into the second high-density paste mill, by adding hydrogenperoxide steam generator three times,
Slurry is bleached.By said process, realize fiber and lignin, pectin etc. and separate.
By to thread rolling machine, the first high-density paste mill, the second high-density paste mill add hydrogenperoxide steam generator, whiteness respectively by
40 degree are promoted to 65 degree, 65 degree and are promoted to 74 degree；74 degree are promoted to 86 degree.
Subsequently into slurry tank, boiling is passed through in slurry tank, softens slurry, while 8kg density is added into slurry tank
For 0.75g/ml water soluble oxidized Tissuemat E, the slurry after boiling enters low dense fiberizer, carries out further
Fine grinding, ozone is passed through with 1.2kg/min speed in low dense fiberizer, is passed through time 20min.Bleached by the depth of ozone
Afterwards, whiteness is promoted to 94 degree by 86 degree before, then rinses and stalk fibre is made.
The mass fraction of hydrogenperoxide steam generator is 24.5%.
Embodiment 3
1 ton of pending stalk is weighed, pending stalk is crushed first, is cut into a bit of stalk section,
Rubbed subsequently into thread rolling machine, preliminary pretreatment is done to pending stalk, and the debris such as disintegrating slag are removed.
Then the stalk section after rubbing is put into saturation tank, infiltrated with weakly alkaline immersion fluid.Stalk after infiltration
Section, which is placed into kneading machine, is rubbed, and during rubbing, weakly alkaline immersion fluid infiltration is constantly added, by rubbing
The stalk section after infiltration is softened after process, while is passed through hydrogenperoxide steam generator 90kg, the straw after rubbing
Stalk section is entered back into the first high-density paste mill, the second high-density paste mill and carries out defibrator process, and peroxide is passed through into the first high-density paste mill
Change hydrogen solution 45kg, hydrogenperoxide steam generator 45kg is passed through into the second high-density paste mill, by adding hydrogenperoxide steam generator three times,
Slurry is bleached.By said process, realize fiber and lignin, pectin etc. and separate.
By to thread rolling machine, the first high-density paste mill, the second high-density paste mill add hydrogenperoxide steam generator, whiteness respectively by
40 degree are promoted to 62 degree, 62 degree and are promoted to 72 degree；72 degree are promoted to 84 degree.
Subsequently into slurry tank, boiling is passed through in slurry tank, softens slurry, while 10kg density is added into slurry tank
For 0.75g/ml water soluble oxidized Tissuemat E, the slurry after boiling enters low dense fiberizer, carries out further
Fine grinding, ozone is passed through with 1.5kg/min speed in low dense fiberizer, is passed through time 20min.Bleached by the depth of ozone
Afterwards, whiteness is promoted to 92 degree by 84 degree before, then rinses and stalk fibre is made.
The mass fraction of hydrogenperoxide steam generator is 24.5%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (7)
- A kind of 1. bleaching process in stalk fibre extraction process, it is characterised in that：Pending stalk is crushing, after immersion, Successively by thread rolling machine, the first high-density paste mill, the second high-density paste mill, slurry tank, low dense fiberizer, afterwards by rinsing system Obtain stalk fibre；The hydrogen peroxide for being passed through identical mass fraction into thread rolling machine, the first high-density paste mill, the second high-density paste mill respectively is molten Liquid, into low dense fiberizer being passed through ozone is bleached, and fiber protection agent is added into slurry tank, and carry out boiling.
- 2. the bleaching process in stalk fibre extraction process according to claim 1, it is characterised in that：Thread rolling machine, first The quality sum and the mass ratio of pending stalk of the hydrogenperoxide steam generator used in high-density paste mill, the second high-density paste mill be 0.1~0.3:1.
- 3. the bleaching process in stalk fibre extraction process according to claim 2, it is characterised in that：To thread rolling machine, The volume ratio of hydrogenperoxide steam generator is respectively 2 in one high-density paste mill, the second high-density paste mill:1:1.
- 4. the bleaching process in stalk fibre extraction process according to claim 1, it is characterised in that：In low dense fiberizer Ozone is passed through with 0.2~3kg/min speed according in pending stalk per ton, is passed through 15~30min of time.
- 5. the bleaching process in stalk fibre extraction process according to claim 1, it is characterised in that：Fiber protection agent with The mass ratio of pending stalk is 1:100~150.
- 6. the bleaching process in stalk fibre extraction process according to any one of claim 1 or 2 or 3, its feature exist In：The mass fraction of hydrogenperoxide steam generator is 24.5%.
- 7. the bleaching process in stalk fibre extraction process according to claim 5, it is characterised in that：Fiber protection agent is Water soluble oxidized Tissuemat E, the density of water soluble oxidized Tissuemat E is 0.75g/ml.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711064902.1A CN107604731A (en) | 2017-11-02 | 2017-11-02 | A kind of bleaching process in stalk fibre extraction process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711064902.1A CN107604731A (en) | 2017-11-02 | 2017-11-02 | A kind of bleaching process in stalk fibre extraction process |
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| CN107604731A true CN107604731A (en) | 2018-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528302A (en) * | 2019-07-15 | 2019-12-03 | 华南理工大学 | A kind of method of ozone treatment thermomechanical pulp fiber surface |
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| US20040035537A1 (en) * | 2000-09-18 | 2004-02-26 | Michel Delmas | Method for bleaching paper pulp |
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| JP2008013859A (en) * | 2006-07-03 | 2008-01-24 | Mitsubishi Gas Chem Co Inc | Method for bleaching non-wood pulp without chlorine |
| CN102242521A (en) * | 2011-06-22 | 2011-11-16 | 陈集双 | Method for preparing pulp by gramineous straw and use of obtained pulp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040035537A1 (en) * | 2000-09-18 | 2004-02-26 | Michel Delmas | Method for bleaching paper pulp |
| JP2008013859A (en) * | 2006-07-03 | 2008-01-24 | Mitsubishi Gas Chem Co Inc | Method for bleaching non-wood pulp without chlorine |
| CN101082188A (en) * | 2007-08-03 | 2007-12-05 | 山东泉林纸业有限责任公司 | Scouring process for grass pulping course |
| CN102242521A (en) * | 2011-06-22 | 2011-11-16 | 陈集双 | Method for preparing pulp by gramineous straw and use of obtained pulp |
| CN103174047A (en) * | 2013-04-16 | 2013-06-26 | 枣庄鸿润纸业有限公司 | Process for refining wheat-straw pulp by hydrogen peroxide enzyme method |
| CN104711881A (en) * | 2015-02-12 | 2015-06-17 | 新疆国力源环保科技有限公司 | Salix psammophila bleached chemi-mechanical pulp technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528302A (en) * | 2019-07-15 | 2019-12-03 | 华南理工大学 | A kind of method of ozone treatment thermomechanical pulp fiber surface |
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Application publication date: 20180119 |