CN1657696A - Process for pulping by biochemical solvent - Google Patents
Process for pulping by biochemical solvent Download PDFInfo
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- CN1657696A CN1657696A CN 200510052346 CN200510052346A CN1657696A CN 1657696 A CN1657696 A CN 1657696A CN 200510052346 CN200510052346 CN 200510052346 CN 200510052346 A CN200510052346 A CN 200510052346A CN 1657696 A CN1657696 A CN 1657696A
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- pulping
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- filter
- biochemical solvent
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Abstract
The invention relates to a technology for pulping with biochemical solvent, with the technical course: use the nonwood fiber plant as the raw material, scatter it and clear the mixture away, through pulping, disc mill, potching and pulp washing to be the product brei. It has the characteristics that the pulping course is immersing the scattered material into biochemical solvent for 2-2.5h under the general temperature and pressure, it has simple technique convenient operation, low cost, and no pollution.
Description
Technical field
The present invention relates to pulp technology for making paper, particularly relate to a kind of process for pulping by biochemical solvent.
Background technology
Straw pulp paper making process has long history.For a long time, because straw such as wheat straw is than abundant many of timber resources, and cheap, so China's paper industry is main raw material with the non-wood-fiber always, promptly straw pulp accounts for more than 85% of whole paper making raw material.
At present, adopt the technology of forage slurrying to mainly contain: soda processes, sulfate process, ammonia process etc., and based on soda processes, its technical process is spurted with the caustic soda boiling for after at first forage being pulverized removal of impurities again, again through mill, after floating slurry, pulp washing the finished product slurry, but in the soda pulping process, can produce a large amount of alkali colloid black liquor that contain, this alkali colloid that contains deals with very difficulty night, very easily causes environmental pollution.Traditionally, to the processing of black liquor nothing more than there being three kinds, i.e. lignin acidizing separation method, alkali lignin method and burn alkali recycling method, practice shows, these three kinds of methods are contaminated solution problem fundamentally all.Especially done recent two decades with burning alkali recycling method in China; also can be referred to as mature technology, still, this method investment is too big; income is lower; general enterprise is difficult to bear, and can not fundamentally solve problem of environmental pollution again, so in order to protect environment; China has to limit the development scale of straw pulp; force the whole nation more than 8000 tame small-sized paper mill closure, suspension, merger and conversion, cause enormous economic loss, liquid causes a large amount of wastes of forage resource simultaneously.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, provide a kind of and realize forage slurrying under no heat energy, no high pressure, no conditions of cooking, and do not produce black liquor, rinsing is easy, and technology is simple, invests little process for pulping by biochemical solvent.
Technical scheme of the present invention is:
A kind of process for pulping by biochemical solvent, its technical process is for being raw material with the non-wood-fiber plant, after its pulverizing removal of impurities, behind slurrying, mill, rinsing, pulp washing, be the finished product slurry, it is characterized in that: described pulping process will be pulverized to expect to put in the biochemical solvent and soak 2-2.5 hour under normal temperature and pressure conditions;
The proportioning of described biochemical solvent is:
Salicylate 3%;
Hypochlorite 4%;
JFC bleeding agent 1%;
Potassium oxide 1%;
Nitrite 3%;
Phosphite 1%;
Anthraquinone 0.05%;
Reactive silicate 2%;
Chlorine dioxide 0.5%;
Biotin (C
10H
16N
2O
3S) 0.5%;
All the other are water;
Above-mentioned slurrying, float sewage behind slurry and the pulp washing and filter the back with the MF millipore filter respectively and recycle.
The technical indicator of above-mentioned biochemical solvent is:
Form: liquid state
Color: light milky white
Smell the flavor volatile matter: do not have
PH value: 9-9.5
Concentration: 16% (working concentration 8%)
Do not fire, harmless, no burn into do not have rotten, nontoxic
Storage temperature :-28 ℃-50 ℃.
The selected MF millipore filter of the present invention is 500mm grade one filter and the secondary filter that Shandong Paper Making Machinery Plant produces, and wherein the filtering accuracy of grade one filter is that filtering accuracy is 100um, and the separate unit aquifer yield is 115m
3/ h is the using and the reserved running status, and the filter material is a stainless steel, and the filter stamen is a duolateral filter stamen, and the filtering accuracy of secondary filter is 10um, and the separate unit aquifer yield is 62.5m
3/ h is the capable state of dual-purpose one received shipment, and the filter material is a stainless steel, and the filter stamen is a duolateral filter stamen.
One-level MF millipore filter is in the process of putting into operation, the dirt of being tackled, impurity form " bridge formation " effect on filter stamen surface, utilize dirt, the impurity interception granule foreign close itself with it, filter efficiency can increase along with the time lengthening of operation, but prolongation with running time, though filtering accuracy progressively increases, inlet outlet pressure differential progressively increases, when pressure is excessive, can be with impurity, dirt is pressed into filter stamen deep layer, for reducing operating cost, when inlet outlet pressure differential reaches 0.1Mpa, should pull down and clean, generally can reach satisfied recovery effects.The filter stamen can be kept 7-8 more than the month under normal operation.The structure of filter satisfies the requirement of changing the filter stamen fast.The filter stamen of pulling down can utilize again through behind the fine purifiation.
Secondary MF filter is owing to there is first order MF filter to filter as preliminary treatment, and the life-span and the cycle of therefore filtering the stamen use are longer, cleans the back through replacing and reuses.
MF filter operation pressure is at 0.1Mpa-0.2Mpa.Impurity after the filtration can be done fertilizer, also can be used to cultivating earthworm.Salt in the water can evaporate with spray-on process, also can concentrate the back and extract industrial salt.Recycle-water COD is less than 100ppm, if water is not handled, its COD is 298ppm, far fewer than the COD420ppm of environmental administration's regulation.
Method of the present invention just can be soaked catalytic treatment to the wheat straw after the chopping removal of impurities under normal temperature, atmospheric pressure state, make wheat straw produce copolyreaction, change the performance of grass fiber from microcosmic, wheat straw epidermis colloid is come off, and the fiber protection is complete, and pulping rate improves greatly; In addition, can make that fubril aggregates into big fiber in the water, make full use of, avoid discharging with water.After passing through rinsing again, just can produce the paper making pulps (paper for daily use and cultural paper etc.) that meets every index request.
The present invention compares with prior art, has the following advantages:
The first, with biochemical process ryegrass pulping production technology, topmost characteristics are to have realized cleaner production.This technology has overcome many shortcomings of other traditional handicrafts, do not need boiling, do not produce black liquor, except that pulp washing produces a small amount of waste water (but reuse after the waste water simple process), its catalytic process, bleaching process has been realized zero-emission, and this is an important breakthrough of paper-making pulping process.
The second, owing to adopt new technology, carry out biochemical ryegrass pulping at normal temperatures and pressures, eliminated high temperature, the potential safety hazard of high pressure, rotary spherical digester blast has been improved the environment of workman's production operation.
Three, pulping process is simple, and aspect investment in fixed assets and operating cost, more traditional alkali reclaims ryegrass pulping technology all significantly reduction, and has significantly reduced the expense of pollution control.
Four, make full use of the wheat straw resource, protected forest-tree.Simultaneously, increase peasant's income, also prevented the atmosphere pollution and the wasting of resources that bring with crop straw burning.
Five, process using biochemical process slurrying does not produce black liquor, easily rinsing, so water-saving result is remarkable.The water consumption national standard that one ton of paper is made in traditional handicraft slurrying is 240 tons (390 tons in Ningxia), and the slurrying of this technology is made one ton of paper water consumption and is lower than 60 tons, than traditional handicraft water saving 75%.
Six, owing to adopting process segmentation on this programme, therefore the mode of equipment split is carried out the modular expansion ratio and is easier to realize, also help simultaneously the independent modification of different process section operational factor, realize serialization production, module production and automated production, easy realization of industrialization easily.
Technology of the present invention has been carried out lab scale in laboratory and part papermaking enterprise, and various parameters all reach designing requirement, and therefore, technical route is clear, accurate and feasible.
In order fully to show technique effect of the present invention, the spy provide with prior art at the table of comparisons aspect the benefit:
| The traditional law system slurry | New technology slurrying |
| With (GB is discharged below 420) chemical time about caustic soda COD=2000 3.5 hours | With biochemical agent COD=298 left and right sides chemical time 2.5 hours |
| Blowdown, water-white run off.PH is 14 | Zero-emission, water circulation is used.PH is 8 |
| 500 yuan of pollution treatment expenses of slurry per ton | 80 yuan of pollution treatment expenses of slurry per ton |
| One ton of paper water 240-390 ton | About 60 tons of one ton of paper waters |
| Three tons of wheat straws produce one ton of slurry | 15 ton of wheat straw produces one ton of slurry |
| One ton of slurry drops into 30 work days of labour | One ton of slurry drops into 8 work days of labour |
| Boiling, generation black liquor | Not boiling, do not produce black liquor |
| Pressurization, heating, electricity consumption 100% | Normal temperature, normal pressure, electricity consumption 37% |
| Starch 2500 yuan of costs for one ton | Starch 1300 yuan of costs for one ton |
| Found the factory and invest 100% | The investment of founding the factory can be saved 40% fund |
| Administering contaminated equipment is 40% of the investment of founding the factory | Pollution treatment instrument is the investment 5% of founding the factory |
In sum, process for pulping by biochemical solvent of the present invention, technology is simple, and is easy to operate, reduced investment, it is low to consume energy, and cost is low, and pollution-free, environmental protection.
The specific embodiment
Raw material is chosen wheat straw, straw, cornstalk, bagasse, reed, the cotton bar, fibrous plants such as poplar, at first adopting belt conveyor to send in the chaffcutter raw material shreds, subsequently through the removal of impurities of bipyramid deduster, then through conveyer belt, pre-material conveyer is sent in the preimpregnation jar and biochemical solvent under normal temperature and pressure conditions hybrid reaction 2-2.5 hour, this preimpregnation part can be used jar, also can be with pre-dipping machine (adopt spiral pipeline formula or absorption type make), when being transformed, traditional handicraft rotary spherical digester can be used when preimpregnation equipment (adopt boiling to spurt and to shorten chemical time, but increased the slurrying cost relatively).
Used biochemical solvent proportioning is:
Salicylate 3%;
Hypochlorite 4%;
JFC bleeding agent 1%;
Potassium oxide 1%;
Nitrite 3%;
Phosphite 1%;
Anthraquinone 0.05%;
Reactive silicate 2%;
Chlorine dioxide 0.5%;
Biotin (C
10H
16N
2O
3S) 0.5%;
All the other are water.
Reacted slurries can make it send into shove in the press master by the pre-material conveyer with certain-length in the preimpregnation jar, and this purpose is to make the utilization of feed liquid mesophytization solvent recovery.Feed liquid behind the shove adopts conventional pulping technique to finish subsequent treatment, as bolting, and mill in the disc mill, rinsing, pulp washing is last that finished product is starched.
The present invention also with slurrying, float sewage behind slurry and the pulp washing and filter the back with the MF millipore filter respectively and recycle.
Claims (3)
1. process for pulping by biochemical solvent, its technical process is for being raw material with the non-wood-fiber plant, after its pulverizing removal of impurities, behind slurrying, mill, rinsing, pulp washing, be the finished product slurry, it is characterized in that: described pulping process will be pulverized to expect to put in the biochemical solvent and soak 2-2.5 hour under normal temperature and pressure conditions.
2. according to the described process for pulping by biochemical solvent of claim 1, it is characterized in that the proportioning of described biochemical solvent is:
Salicylate 3%;
Hypochlorite 4%;
JFC bleeding agent 1%;
Potassium oxide 1%;
Nitrite 3%;
Phosphite 1%;
Anthraquinone 0.05%;
Reactive silicate 2%;
Chlorine dioxide 0.5%;
Biotin (C
10H
16N
2O
3S) 0.5%;
All the other are water.
3. according to the described process for pulping by biochemical solvent of claim 1, it is characterized in that above-mentioned slurrying, float sewage behind slurry and the pulp washing and filter the back with the MF millipore filter respectively and recycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100523467A CN100497809C (en) | 2005-02-07 | 2005-02-07 | Process for pulping by biochemical solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100523467A CN100497809C (en) | 2005-02-07 | 2005-02-07 | Process for pulping by biochemical solvent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1657696A true CN1657696A (en) | 2005-08-24 |
| CN100497809C CN100497809C (en) | 2009-06-10 |
Family
ID=35007388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100523467A Expired - Fee Related CN100497809C (en) | 2005-02-07 | 2005-02-07 | Process for pulping by biochemical solvent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100497809C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831819A (en) * | 2009-03-09 | 2010-09-15 | 陈根长 | New aggregative-state modified pulp and paper making process |
| CN102296476A (en) * | 2010-06-25 | 2011-12-28 | 温战军 | Photodynamic chemical transformation pulping technology and pulping machine |
-
2005
- 2005-02-07 CN CNB2005100523467A patent/CN100497809C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831819A (en) * | 2009-03-09 | 2010-09-15 | 陈根长 | New aggregative-state modified pulp and paper making process |
| CN102296476A (en) * | 2010-06-25 | 2011-12-28 | 温战军 | Photodynamic chemical transformation pulping technology and pulping machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100497809C (en) | 2009-06-10 |
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Granted publication date: 20090610 Termination date: 20120207 |