CN1153240A - Pollution-free paper making method - Google Patents
Pollution-free paper making method Download PDFInfo
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- CN1153240A CN1153240A CN 96109752 CN96109752A CN1153240A CN 1153240 A CN1153240 A CN 1153240A CN 96109752 CN96109752 CN 96109752 CN 96109752 A CN96109752 A CN 96109752A CN 1153240 A CN1153240 A CN 1153240A
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Abstract
A method for making paper without pollution features use of biochemical theory of straw fibre to treat wheat stalk, including pretreating: vibration screen, proper cutting, pressing thin layer and washing with water; high-temp and -pressure treating, temp-maintaining and pressure-reducing bulking, separation of fibre structure, pulping and making paper.
Description
The present invention relates to the grass fiber papermaking process.Especially make raw material, do not add chemicalss such as lime, caustic soda, imonium when the slurrying, do not produce novel pollution-free paper making method contaminant water, no blowdown pollution treatment, task with wheat straw for a kind of.
Along with the continuous enhancing of people's environmental consciousness, the restriction paper industry pollutes, and it is strong day by day to require to transform the cry of administering the paper mill environmental pollution.Therefore, hopeless little paper mill is administered in restriction, implementation is closed, and meets the will of the people.For the medium-sized paper plant that produces per year more than the five kiloton paper, if first in November thoroughly pollution treatment person still closes.Present domestic and international single waste water control person, effect is little, and expensive big, not thorough, and it is permanent poor to be benefited.Wanting paper industry does not have sewage discharge, must be from paper technology, and thoroughly without chemicals, pulp washing does not have the pulp-water discharging, changes old traditional handicraft, the system process of upright new pollution-free paper making method; Really form: no chemicals, no pulp-water discharging, non-environmental-pollution paper process.
Pollution-free paper making method is the certainty of paper industry development; It is product of the time.Must use pollution-free paper making method production, paper plant could survive, development.Because: the sewage discharge of old law papermaking has influence on the mankind and biological existence, the balance of ecological environment really.The use that chemicalss such as lime in the paper technology, caustic soda, imonium are revolved in this contamination hazard source reaches because slurrying is improper: machinery falls behind to destroy makes the paper fiber, produces the short or staple fibre that becomes of 20-40%, forms suspended matter and discharges with pulp-water.Be the pulp washing in the old technology paper-making process.In pulp-water, have chemicals.Conventional waste water control is just from pulp washing, so, fail thoroughly to eradicate pollution, and often bring the new pollution of unsurmountable chemicals.Therefore, it is quite complicated to utilize chemicals to handle the chemicals pollution problem.Just because of this, the processing effect of papermaking wastewater is little at present.
Must know four main standard of GB regulation to the pollution treatment notion in original paper mill.The formulation of this standard is to handle the back with papermaking wastewater to allow emission standards.And be not that pollution-free paper making method is not also heard generation at that time, have to be with this as the pollution treatment standard.Though it is this standard is very not comprehensive, also too low.Forbidden not have sewage discharge or forbidden to have the discharging of processing water, be only high standard.And pollution-free paper making method is accomplished without any water and is discharged.Certainly be comparatively advanced at present paper process.This paper process is saved paper making water 190m per ton except that saving the great amount of conventional water
3Pulp washing blowdown water.Eliminated the main source of sewage of sewage discharge.Because of there not being sewage discharge, therefore, save waste water control.
Pollution-free paper making method is very clear to the pollution control notion, start with thoroughly from the beginning to effect a radical cure a whole set of technology, completely without chemicals, simultaneously, in the raw-material long line vibration screening of paper technology, suitable cutting, the thin layer pressurization, water washing dedust, in the four road pre-treatments, to raw material--wheat straw carries out comparatively conscientious foreign bodies removal.In the High Temperature High Pressure of boiling, expanded, the fibre structure of insulation step-down separates in three links still with the plant body--the continuity biochemical phenomenon of wheat straw self.Make fibre structure obtain separating.The factor of fiber separation is that hot water can make the binding between cell and the cell--branch exsolutions such as lignin, hemicellulose, pectin, starch, low candy, tannin, pigment are separated.Certain this conditional request is very tight, is must be within temperature, pressure, moisture, time optimum range.Especially when sensitive spot, separate, solute effect is fast and thorough, has also established good basis for slurrying.By on know the general anything but unconditional hot water of hot water during separate dissolved, and mean condition " hot water " within the key element scopes such as temperature, pressure, moisture content, time.This condition " hot water " is still the performance essence of wheat straw continuity biochemical phenomenon.But still do not use chemicals and obtain, more even more ideal than what obtain really with chemicals.
The pollution-free paper making method pre-treatment, boiling chemicals of no use, pulping process just need not be used medicine again.Therefore say with regard to whole notion, break away from the chemical pulping method paper technology fully, become real pollution-free paper making method.
It is to produce just to go to handle after promptly forming sewage that existing papermaking sewage is administered, so be passive means.With dirty pollution treatment, pollute dirt, pollution treatment is produced dirty more dirty.So, all do not break through the pollution treatment difficulty for many years, it is hopeless and close the paper mill to form pollution treatment.Pollution-free paper making method, at first be from the pollution sources analysis, thoroughly without chemicals, from the essence of plant physiology, biochemistry, papermaking material--fiber is obtained the best approach and is started with, thoroughly changed the technology of old law papermaking, so the purpose and the starting point have obtained unification.Begin to transform the reality that meets paper industry from technology.Nature is from pulp-water discharging, pollution treatment thoroughly also be not deserved result.
Pollution-free paper making method has been complied with the natural law, for new road has been started in the existence of medium and small papermaking, but will finish the task of transforming middle-size and small-size paper plant, waits to make great efforts in many ways.This is because at first there is the pollution of chemicals in the old technology paper process.Chemicals valency 70--400 per ton unit.The energy consumption height, ton paper electricity consumption 425 degree, heat energy coal 800kg, because of having used medicine and boiling method improper, fiber destruction is serious, and short and superbhort fiber forms in a large number, generally at 20%-40%, so a ton finished paper is still needed about wheat straw 1.5-1.7 ton.Therefore, it is low to present yield.Pre-treatment is not carried out in most paper mills.So papermaking foreign matters such as sandy soil mud thing do not have eccysis, and are except that influencing the paper product quality, very big to the damage of paper machine felt.Though old law becomes paper to adopt the bean paste dish, long line song road send measures such as slurry, because of staple fibre mixes knot with foreign material-suspended matter-silt, is difficult to remove totally, influences the paper product quality.In addition, the pulper of old paper technology is big and stupid, and fiber destruction is serious, and that must abandon renews.Should transform-improve design to digesting apparatus (rotary spherical digester, steamer).
In a word, change old law paper technology, corresponding complete equipment and the supporting technology that adapts to new method technology that produce.
The papermaking origin cause of formation of pollution-free paper making method is:
The naturally occurring condition of utilizing naturally is that plant self is disintegrated.It is theoretical gene.This natural phenomena at any time as seen.The disintegration of various crudefiber crop epidermins separates, cellulosic separation behind the disengaging body of bark tissue fiber, the body of any fibre-bearing composition can show all that in the separation of occurring in nature fibr tissue fiber disintegrates under nature, the example of separation is told us: as long as the disintegration separation condition exists, time is suitable, do not add chemicals, all can obtain fiber, this is no chemicals, no pulp-water discharging, the natural theory of pollution-free paper making method.
Above-mentioned confirmation does not have the effect of chemicals, utilizes the biochemical factor of its plant self, and extraneous additional physical factor still can obtain papermaking material-fiber.So: the essence that plant self biochemical phenomenon exists; Pectin, non-fibr tissue etc. destroy dissolution conditions; The factor that the fiber disintegration separates then is the theoretical foundation of pollution-free paper making method.
This biochemical theoretical existence and application provide theoretical foundation to the reform and development of paper industry.This theory be used in pilot scale and to Henan Province * * technology in paper mill, process and equipment modification after, through practice, confirm theoretical reliably, each production link is all very stable, quality of finished paper improves one-level, cost paper decline per ton 300-320 unit.
The existence of lignin and disappearance: understand from the papermaking origin cause of formation and preliminary survey result: in the very easy stripping of the lignin in plant-wheat straw intermediate layer, then difficult removal the in cell membrane.Easily stripping be mostly combine with hemicellulose and then difficulty that cellulose combines is removed.No matter be to remove or do not remove what, but the quality and the yield of paper all there are the role and influence of getting well.So, the paper that new method is produced: light, bright, flat, line is thin, matter is strong, the paper made of special material seemingly.
Pollution-free paper making method is the application of comprehensive paper technology, and the profit screen of half fiber helps improving pulping yield and paper strength.The non-cellulose material can be dissolved in hot water.Conduit in the wheat straw raw material, parenchyma cell, superficial cell, lithocyte general designation are made heteroproteose cell, can be used for papermaking, and the quality that improves paper becomes a reality.So, in theoretical and reality, obtained checking and unified without the practice of pulp washing.
In plant, the distribution situation of fiber and fiber and effect and chemical property thereof all have certain difference, utilize these difference, fiber can be separated from plant.Pollution-free paper making method promptly is that the way that does not add chemicals obtains fiber, and other composition is applied fully cleverly, that is the composition of washing off in the old law technology also wants ingenious application, has improved raw-material utilization rate, but has not influenced the paper product quality.Its anti-quality that improves paper product.
Pollution-free paper making method is meant and do not use any chemicals in whole papermaking process, not pulp washing, not have pulp-water be sewage discharge; Without any a whole set of paper making process that pollutes.Its whole technology: (referring to technological process of production figure)
One, pre-treatment:
1, the raw material of pollution-free paper making method is a wheat straw.
2, the program of raw material pre-treatment:
(1), wheat straw is delivered to sieve mesh with the conveyer belt of the long 600mm of wide 800mm is among 10 * 30 the cylinder, and foreign matters such as soil block sand are tentatively cleared up.This is long line vibration screening.
(2), the wheat straw after screening enters in the reel adding pressure type cutting machine, finishes cutting and thin layer pressurization two procedures.About Cutting Length 50mm.Wheat straw becomes the broken shape of short straw after the thin layer pressurization,
(3), be sent to automatically through the short wheat straw of thin layer pressurization and have water and collect in the molten device of washing of the foreign material removing that recycles, finish the water washing dedust operation.
Two, boiling
1, the basic condition of boiling is: wheat straw must pass through pre-treatment program.
2, six key elements of boiling:
(1), boiling raw material, container, temperature, pressure, moisture content, time then are six key elements.So-called six key elements, that is: the condition of wheat straw papermaking digesting is: the temperature of rotary spherical digester or steamer is 118--140 ℃, and pressure is the 3--6 atmospheric pressure, and the ratio of wheat straw and water is 1: 1.3--1.8, the time is 120--180 minute.Within the scope of six key elements regulation, can both cause paper.
(2), program:
To send into boiling container rotary spherical digester, steamer through the wheat straw of pre-treatment.Inject moisture content according to regulation.Ventilate immediately after checking safety.When temperature, pick up counting when pressure reaches required standard.And regulate temperature, pressure at any time, to the stipulated time preceding 10 minutes, stop for steam.After stopping the supple of gas or steam again through expanded discharging then in 2 hours.
Pollution-free paper making method has reached suitable point to the cooperation of conditions of cooking.So, had only get final product in 2-4 hour through the wheat straw after heat phase of boiling.And old paper technology needs 10-15 days in the winter time, needs 8-12 days in spring, autumn.Since the elongation of time after heat phase, the inconvenience that causes the expansion of storage space and bring operating aspect.And get final product slurrying after the new technology discharging, for the continued operation between the technology provides convenience and condition.
Three, slurrying:
1, slurrying principle is to keep fiber to carry out under released state as much as possible; Obtain long fiber rather than fiber destruction as much as possible.
2, pollution-free paper making method must be rubbed comprehensive special-purpose pulper with pressing to beat.This pulper to be beating, and presses to beat that rubbing combines carries out.One machine just possesses these functions.
3, the slurrying time is 5-20 minute.
Four, papermaking:
The slurry that makes is sent into stock tank, deliver to the paper machine through the bean paste dish.And promptly quantitatively adjust pulp density and supply amount according to the gram number of paper product.Make the paper of different regulation models.
Five, equipment:
(1), pollution-free paper making method must supporting pre-treatment, pulping by cooking three parts special equipment.
(2), comply with the present situation of present paper industry:
A, increase pre-treatment part.
B, improvement rotary spherical digester, steamer use to adapt to pollution-free paper making method.
C, the original old technology pulper of replacing, adapted new technology composite type pulper.
Six, paper product:
Pollution-free paper making method can be produced all grass fiber paper products such as former corrugated paper, yellow plate paper, boxboard, wrapping paper, high strength paper.
The good effect of pollution-free paper making method:
1, pollution-free paper making method has fundamentally changed paper technology, and " the paper machine " of usefulness only done suitably to improve and not big the change, and other equipment needs to increase a part of special equipment by the new technology requirement.Old equipment is big and heavy, effect is low.New equipment is small and exquisite, flexible, effect is high.
2, do not add lime, caustic soda, imonium or other chemicals when boiling, so there is not chemical contamination when papermaking, the paper mill does not have the pollution treatment task.And the Hydroenergy collecting of paper grade (stock) has been realized when papermaking: paper mill " water is collected and recycled " target.
3, not pulp washing, do not have pulp-water discharging.(on July 1st, 1992 national regulation: the permission quantity of wastewater effluent of founding the factory is 190m
3/ ton paper) this pollution-free paper making method does not use chemicalss such as lime, caustic soda, imonium during slurrying, does not need pulp washing, so there is not sewage discharge.Being right production ton paper just can conserve water 190m
3, chemicals takes 250-400 unit.Electricity consumption, steam are saved 1/4-1/3 respectively.If produce 5000 tons paper plant per year, 1 year energy conserve water 950000m
3
4, once drop into, income for many years, change: conditions such as boiling, pressure, temperature, time, moisture content can obtain different paper products.The technology that pollution-free paper making method is new (inside) has been used for producing, verifies grass fiber goods such as feasible, the former corrugated paper of being produced, yellow plate paper, boxboard, wrapping paper, high strength paper, meets the GB13023--91 standard-required through provincial quality monitoring testing station check.
Claims (2)
1, a kind of pollution-free paper making method is to be raw material with the wheat straw, it is characterized in that:
When paper-making pulping, do not add chemical substances such as lime, caustic soda, imonium, so produce the problem of sewage, contaminated environment when not having pulp washing, but biochemical theoretical according to a tree name grass fiber pressed: the new technology of pre-treatment, boiling, slurrying, papermaking carry out papermaking and in paper-making process used Hydroenergy collecting can recycle.
2, pollution-free paper making method according to claim 1, the feature of this new production technology:
(1), pre-treatment
A, long fiber vibration screening: wheat straw is delivered among the cylinder that contains certain sieve mesh of foreign matters such as can disposing soil block, sand, handstone with the conveyer belt of certain length and width,
B, suitable cutting, thin layer pressurization: will screen the back wheat straw and send in the reel adding pressure type cutting machine,
C, water washing dedust: the short wheat straw that forms broken shape through " b " is sent to automatically and has water and collect in the washing container that recycle, the foreign material removing,
(2), boiling: carry out in special equipment--High Temperature High Pressure, expanded, the fine paper structure separation circuit of insulation step-down: the condition of generated by making paper with wheat straws boiling is: the temperature of rotary spherical digester or steamer is 118--140 ℃, pressure is 3--6 atmospheric pressure, the ratio of wheat straw and water is 1: 1.3--1.8, time is 120--180 minute
(3), slurrying: to beat, to carry out to press, to beat, to rub in the special plane that combines, the slurrying time is 5--20 minute,
(4), papermaking: the paper pulp that makes is sent into stock tank, deliver to through on the novel papermaking machine after the technological transformation through the bean paste dish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96109752 CN1153240A (en) | 1996-09-13 | 1996-09-13 | Pollution-free paper making method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96109752 CN1153240A (en) | 1996-09-13 | 1996-09-13 | Pollution-free paper making method |
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| Publication Number | Publication Date |
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| CN1153240A true CN1153240A (en) | 1997-07-02 |
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| CN 96109752 Pending CN1153240A (en) | 1996-09-13 | 1996-09-13 | Pollution-free paper making method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250831B (en) * | 2006-02-22 | 2011-05-04 | 向宝玉 | Method for producing cattle manure paper-pulp using cattle manure as raw material |
| CN102154905A (en) * | 2011-02-25 | 2011-08-17 | 福建省晋江优兰发纸业有限公司 | Method for non-pollution papermaking by banana tree stalks |
| CN104594090A (en) * | 2015-01-19 | 2015-05-06 | 北京中金元龙科技开发有限公司 | Water-free explosion pulping process |
-
1996
- 1996-09-13 CN CN 96109752 patent/CN1153240A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250831B (en) * | 2006-02-22 | 2011-05-04 | 向宝玉 | Method for producing cattle manure paper-pulp using cattle manure as raw material |
| CN102154905A (en) * | 2011-02-25 | 2011-08-17 | 福建省晋江优兰发纸业有限公司 | Method for non-pollution papermaking by banana tree stalks |
| CN104594090A (en) * | 2015-01-19 | 2015-05-06 | 北京中金元龙科技开发有限公司 | Water-free explosion pulping process |
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