CN101220567A - Method for controlling with 100aste newsprint paper deinked pulp esterase - Google Patents
Method for controlling with 100aste newsprint paper deinked pulp esterase Download PDFInfo
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- CN101220567A CN101220567A CNA200810025999XA CN200810025999A CN101220567A CN 101220567 A CN101220567 A CN 101220567A CN A200810025999X A CNA200810025999X A CN A200810025999XA CN 200810025999 A CN200810025999 A CN 200810025999A CN 101220567 A CN101220567 A CN 101220567A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a method that uses esterase obtained by 100 percent deinking and desizing of wasted newspaper controls sticky which mainly aims at producing the low fixed amount newspaper by using the 100 percent deinking and desizing of the wasted newspaper, adopts Optimyze 525 esterase control sticky and produces the newspaper with 45g/mm<2> fixed amount. The invention has the advantages of reducing the dosage of the sticky in the paper pulp, leading the sticky removing rate to be about 20 percent to 40 percent, reinforcing the operating performance of a paper machine, and helping to improve the speed and the output of the paper machine; by adopting deinking and desizing of 100 percent wasted newspaper to make 45g/m<2> lowing amount offset newsprint, the obtained products have good quality, chemical pulp and groundwood pulp which are high in pollution and high consumption are eliminated, the manufactory cost of the pulp material and the processing cost of the water are reduced, and the discharged waste water and the pollutants are reduced.
Description
Technical field
The invention belongs to environment and resource technical field, particularly a kind of method of 100% crushed news deinking slurry biological enzyme control sicker.
Background technology
Sicker generally is divided into two big classes, and a class is natural sicker such as resin; Another kind of is the regeneration sicker, is mainly derived from the stickum of recycled fiber, has negative electrical charge mostly.The regeneration sicker generally is made up of with mixtures such as glue, adhesive tape, latex, ink binder, wet strengthening resin and other polymer the adhesive in the paper stock, hot melt adhesive, label, bookbinding.Can be divided into big sicker and fine sicker by particle size, big sicker can be with the way removal of selected, purification and flotation.Fine sicker mainly is the material (Dissolved and Colloidal Substances is called for short DCS) that exists with dissolving or colloidal state in the system.Along with the use of secondary stock increases day by day, whitewater closure circulation degree improves, and some dissolved matters can be assembled and become big; some dissolved matters may generate new secondary sicker; these secondary sickers deposit easily and stop up forming net, felt or dried net, cause disconnected paper, cause the paper machine to be shut down when serious.Fine sicker removal method relatively difficulty is removed, and relatively effective method mainly contains biological enzyme and chemical sticking agent method is controlled fine sicker at present.
Chemistry sticking agent method can the passivation sicker, but the composition more complicated of sicker, often the chemical sticking agent effect of Jia Ruing is not necessarily obvious.
Bioanalysis is removed gluing owner with being to utilize enzyme to handle, a kind of is to utilize esterase that sicker compositions such as fat and acid esters are decomposed, sicker size decreases or viscosity reduce [referring to people such as Dai Wei under this effect, esterase provides a kind of method of controlling sicker for using paper mill and the paper handkerchief paper plant of mixing office's waste paper, paper pulp and paper, 104 (2): 28-312003 (David R.Jones and James W.Fitzhenry, Esterase-type enzymes offer recycled mills an alternative approach to stickies control.Pulp and paper, 104 (2): 28-31,2003)], be to mix office's waste paper, but Mixed Office WasteMOW is two kinds of different wastepaper as raw material with crushed news with esterase treatment.Another kind reduces resin acid [referring to people such as Si Dina with laccase and fatty acid response, laccase and acid of fat glue and resin acid reactivity worth, microorganism application technology, 200122:317-320 (Stina Karlsson, Bjarne Holmbom, Peter Spetz, al., TrametesReactivity of Trametes laccases with fatty and resin acids.Appl MicrobiolBiotechnol.2001,55:317-320)], be to utilize laccase and acid of fat glue and resin acid reaction treatment sicker.Also having a kind of is to utilize the method for pectase processing machine slurry to see patent 200510045357.2, is the method for collosol substance biological treatment in a kind of papermaking, utilizes the collosol substance in the pectase processing machine slurry.
Owing to more and more emphasize energy-saving and cost-reducing cleaner production at present, utilize the low quantitative newsprint of 100% useless news de inked pulp production, pulp-water system lock degree is more increased, and it is more and more difficult therefore sicker to be removed from system fully.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide the method for a kind of 100%ONP (crushed news) deinked pulp esterase control sicker.The present invention mainly is when hanging down quantitative newsprint at 100% ONP deinking slurry production, utilize esterase to come the method for fine sicker in the pulp treatment (fine sicker mainly is meant the material that exists with dissolving or colloidal state in the system), esterase is applied to produce 45g/mm in the 100% crushed news inner control sicker
2Quantitative newsprint.
Purpose of the present invention is achieved through the following technical solutions: a kind of method of 100% crushed news deinked pulp esterase control sicker comprises the steps:
(1) crushed news is mixed after, pulping in beater, control pulping concentration 15%～18% obtains 100% crushed news deinking slurry, adds NaOH, Na then
2SiO
3, H
2O
2, industrial soap and deinking agent GOD1230; Described each material addition is: NaOH 0.6%～0.75%, Na
2SiO
32.0%～2.5%, H
2O
20.4%～1.0%, industrial soap 0.5%～0.6%, deinking agent GOD1230 0.035%, regulating pH value scope is 6.5～10, and temperature is controlled at 50 ℃～60 ℃, and pulping time 30～45min obtains pulping solution; Described crushed news comprises 8# American waste paper 55%, useless glazed printing paper 8%, European waste paper 13%, homemade waste paper 16% and 10# American waste paper 8%.
(2) above-mentioned pulping solution is controlled pulp density 12%～15% in high concentration desanding device; The control pulp density is 3.5%～5% in brown stock chest; The control pulp density is 3%～5% in scalping, and the control pulp density is 1.0%～1.5% in preceding flotation cell, and adds industrial soap 0.08%～0.1%; In the heavy scummer, control pulp density 1.0%～1.5% then; The control pulp density is 1.0%～1.5% in fine screen.
(3) pulp density about 12%～15% after preceding polydisc thickener concentrates; In stock tank one, pulp density is adjusted to 5%～8%; Pulp density reaches 25%～30% after Double-screen filter press concentrates.
(4) add NaOH 0.7%～1.0%, Na in the paper pulp in floating tower
2SiO
32.0%～2.5%, H
2O
20.4%～2.0%, control pulp density 2.5%～3.0%, 65 ℃～80 ℃ of temperature, bleaching time 30～45min.
(5) in stock tank two, control pulp density 3.5%～5%; The control pulp density is 1.0%～1.5% in the flotation cell of back, adds industrial soap 0.08%～0.1%; Through after polydisc thickener slurry to concentrate the back pulp density be 8%～12%.
(6) biology enzyme is joined the exit of polydisc thickener afterwards, the addition of described biology enzyme is 0.15～0.25kg/t slurry; Then in the dense standpipe reaction temperature be 50 ℃～60 ℃, pH is 7～7.5, be 45～60min action time, paper pulp pulping in machine chest then, pulp density is controlled to be 8%～12%; Send machine room production to obtain newsprint at last; Described biology enzyme is an esterase.
Below all by mass percentage.
Described biology enzyme is Optimyze525 enzyme (U.S. Buckman company), is a kind of esterase, and the basic structure of most sickers is that ester bond connects, and esterase reaches the purpose of decomposing sicker with the ester linkage breaking of sicker.
In order to realize the present invention better, the biology enzyme liquid that described biology enzyme dilution is 1%～50% mass concentration joins the exit of back polydisc thickener again.
Inlet pressure is controlled to be 250～280kPa approximately in the described scalping, and outlet pressure is controlled to be 110～120kPa approximately;
Inlet pressure is controlled to be 170～180kPa approximately in the described fine screen, and outlet pressure is controlled to be 150kPa approximately.
The newsprint that described production obtains is 45g/mm
2Low quantitative newsprint.
The principle of the invention is as follows: esterase decomposes sicker compositions such as fat and monoglycerides, sicker size decreases or viscosity reduce under this effect, esterase belongs to ester class enzyme preparation, the important feature of enzyme is to have very strong selectivity, it self is not consumed in chemical reaction process, but vigor but can descend in time.The basic structure of most sickers is that ester bond connects, and selecting the agent of ester fermentoid is exactly the purpose that the ester linkage breaking of sicker is reached the decomposition sicker.Esterase is used for 100% crushed news deinking slurry produces 45g/mm
2Newsprint, the selection pulp density is 10%～12% slurry, reacts 45～60min in the dense standpipe in one, and the sicker rate of removing of slurry reaches about 20%～40%, copies paper after the online and can not break end, and the paper machine can normally move.
The present invention has following advantage and beneficial effect with respect to prior art:
The present invention utilizes esterase treatment 100% crushed news deinking slurry to produce low quantitative newsprint, because the adhesive content in the magma is more, the composition more complicated when summer temperature is higher, is brought very big pitch trouble to production, and production can not normally move.Adopt the inventive method can reduce the content of sicker in the paper pulp, sicker is removed rate about 20%～40%, has strengthened the runnability of paper machine, and the speed of a motor vehicle and the output that improves the paper machine is very helpful.
Adopt the 100% pulp from decoloured waste paper 45g/m that manufactures paper with pulp
2Low quantitative offset printing newsprint, products obtained therefrom is superior in quality, has eliminated and has polluted big, that energy consumption is high chemical pulp and ground wood pulp, makes the manufacturing cost of slurry and cost of water treatment also descend to some extent, and the wastewater flow rate that is discharged and amount of pollutant all have obvious decline.Adopt biological esterase control sicker, reduce paper machine broken end, make paper machine operation normal, save cost.Along with the enhancing of people's environmental consciousness, adopt full pulp from decoloured waste paper, reduce and use former wood pulp will become trend with the mode of production that protects forest resources.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment 1
Adopt the Optimyze525 enzyme product of Buckman company to produce 45g/mm at 100%ONP (crushed news) deinking slurry
2The control of newsprint sicker.
(1) crushed news (8# American waste paper 55%, useless glazed printing paper 8%, European waste paper 13%, homemade waste paper 16%, 10# American waste paper 8%) mix, pulping in beater is controlled pulping concentration 15% then, obtain 100% crushed news deinking slurry, add NaOH 0.6% then, Na
2SiO
32.0%, H
2O
20.4%, industrial soap 0.5%, deinking agent GOD1230 (Zhong Xuan chemical plant, Kunshan) 0.035%, regulating the pH value is 6.5, temperature is controlled at 50 ℃, pulping time 30min; Obtain pulping solution.
(2) above-mentioned pulping solution is successively at high concentration desanding device control pulp density 12%; The control pulp density is 3.5% in brown stock chest; The control pulp density is 3.5% in scalping, and inlet pressure is 250kPa, outlet pressure 110kPa; The control pulp density is 1.0% in preceding flotation cell, adds industrial soap 0.08%; Control pulp density 1.0% in the heavy scummer; The control pulp density is 1.0% in fine screen, inlet pressure 170kPa, outlet pressure 150kPa.
(3) pulp density is 12% after preceding polydisc thickener concentrates; Pulp density is adjusted to 5% in stock tank one; Pulp density reaches 25% after Double-screen filter press concentrates; Decompose the sicker in the secondary stock in heat dispersion machine, the heat dispersion machine energy consumption is 35～40kWh/t slurry.
(4) float the tower bleaching process: in floating the paper pulp of tower, add NaOH 0.7%, Na
2SiO
32.0%, H
2O
20.4%, control pulp density 2.5%, 65 ℃ of temperature, bleaching time 30min.
(5) pulp density is controlled at about 3.5% in stock tank two; Pulp density is controlled to be 1.0% in the flotation cell of back, adds industrial soap 0.08%; Through after polydisc thickener slurry to concentrate the back pulp density be 8%.
(6) biology enzyme Optimyze525 proenzyme liquid is made into the thin liquid of 1% mass concentration, adds the exit of back polydisc thickener, pulp density is 8%, and biology enzyme Optimyze525 enzyme addition is the 0.15kg/t slurry.In in the dense standpipe reaction temperature be 50 ℃, regulating pH is 7, be 45min action time, paper pulp is pulping in machine chest, pulp density is controlled to be 8%; Send machine room production to obtain 45g/mm at last
2Quantitative newsprint.
Below all by mass percentage.
(7) compare adding the paper pulp of Optimyze525 enzyme processing and not enzyme-added paper pulp, (0.25～0.3MPa) gets the paper pulp of 25g over dry slurry at certain hydraulic pressure, through a slotted screen (0.15mm), screening 20min, get the material above the collection sieve plate, use filter paper filtering again, above being pressed in another clean filter paper, scald 2～3min with iron then.The dirt count data acquisition of reference standard deinking slurry is by standard GB/T10740-2002, " mensuration of pulp dirt and fibre bundle " several points, calculating.
Formula:
S
DThe oily wax point mm of-paper pulp
2/ kg.Be accurate to a decimal;
S
1The oily wax point gross area that-paper pulp of surveying is sorted out, mm
2
Paper pulp that W-surveys, g.
The removal amount of sicker is compared with blank and has been reduced as a result, and the content of sicker can be controlled at 100mm
2In/the kg, just operate the computer relatively smoothly, can not cause broken end, the sicker clearance reaches 20%～40%.
Embodiment 2
(1) crushed news (8# American waste paper 55%, useless glazed printing paper 8%, European waste paper 13%, homemade waste paper 16%, 10# American waste paper 8%) mixes pulping in beater, pulping concentration 16%, obtain 100% crushed news deinking slurry, add NaOH 0.7% then, Na
2SiO
32.2%,, H
2O
20.6%, industrial soap 0.55%, deinking agent GOD1230 (Zhong Xuan chemical plant, Kunshan) 0.035%, pH value scope is 10, temperature is controlled at 60 ℃, pulping time 45min; Obtain pulping solution.
(2) above-mentioned pulping solution is successively at high concentration desanding device control pulp density 15%; The control pulp density is 5% in brown stock chest; The control pulp density is 3.0% in scalping, and inlet pressure is 280kPa, outlet pressure 120kPa; The control pulp density is 1.2% in preceding flotation cell, adds industrial soap 0.09%; Heavy scummer control pulp density 1.2%; The control pulp density is 1.2% in fine screen, inlet pressure 1 80kPa, outlet pressure 150kPa.
(3) pulp density is 15% after preceding polydisc thickener concentrates; Pulp density is adjusted to 8% in stock tank one; Pulp density reaches 30% after Double-screen filter press concentrates; Decompose the sicker in the secondary stock in heat dispersion machine, the heat dispersion machine energy consumption is 35～40kWh/t slurry.
(4) float the tower bleaching process: in floating the paper pulp of tower, add NaOH 0.8%, Na
2SiO
32.3%, H
2O
21.0%, pulp density 2.8%, 80 ℃ of temperature, bleaching time 45min.
(5) pulp density is controlled at 5% in stock tank two; Pulp density is controlled to be 1.2% in the flotation cell of back, adds industrial soap 0.09%; Through after polydisc thickener slurry concentrate back pulp density 10%.
(6) biology enzyme Optimyze525 proenzyme liquid is made into the thin liquid of 1.5% concentration, adds the exit of back polydisc thickener, pulp density is 10%, and the addition of biology enzyme Optimyze525 enzyme is the 0.20kg/t slurry.In in the dense standpipe reaction temperature be 50～60 ℃, pH is 7～7.5, be 60min action time, at the machine chest pulping, pulp density is controlled to be 10%; Send machine room production to obtain 45g/mm at last
2Quantitative newsprint.
Below all by mass percentage.
The sicker clearance 20%～40% of present embodiment.
Embodiment 3
(1) crushed news (8# American waste paper 55%, useless glazed printing paper 8%, European waste paper 13%, homemade waste paper 16%, 10# American waste paper 8%) mixes pulping in beater, pulping concentration 18%, obtain 100% crushed news deinking slurry, add NaOH 0.75% then, Na
2SiO
32.5%, H
2O
21.0%, industrial soap 0.6%, deinking agent GOD1230 (Zhong Xuan chemical plant, Kunshan) 0.035%, pH value scope is 8, temperature is controlled at 55 ℃, pulping time 40min; Obtain pulping solution.
(2) above-mentioned pulping solution is controlled pulp density 13% successively in high concentration desanding device; The control pulp density is 4% in brown stock chest; The control pulp density is 5.0% in scalping, and inlet pressure is 260 kPa, outlet pressure 115kPa; The control pulp density is 1.5% in preceding flotation cell, adds industrial soap 0.1%; Control pulp density 1.5% in the heavy scummer; At fine screen control pulp density is 1.5%, inlet pressure 175kPa, outlet pressure 150kPa.
(3) pulp density is 13% after preceding polydisc thickener concentrates; Pulp density is adjusted to 6% in stock tank one; Pulp density reaches 28% after Double-screen filter press concentrates; Decompose the sicker in the secondary stock in heat dispersion machine, the energy consumption of heat dispersion machine is 35～40kWh/t slurry.
(4) float the tower bleaching process: add NaOH 1.0%, Na in the paper pulp in floating tower
2SiO
32.5%,, H
2O
22.0%, control pulp density 3.0%, about 70 ℃ of temperature, bleaching time 40min.
(5) in stock tank two, control pulp density 4%; The control pulp density is 1.5% in the flotation cell of back, adds industrial soap 0.1%; Through after polydisc thickener slurry to concentrate the back pulp density be 12%.
(6) biology enzyme Optimyze525 enzyme is added in the exit of polydisc thickener afterwards, pulp density is 12%, and the addition of biology enzyme Optimyze525 enzyme is the 0.25kg/t slurry.In in the dense standpipe reaction temperature be 55 ℃, pH is 7.5, be 50min action time, at the machine chest pulping, pulp density is controlled to be 12%; Send machine room production to obtain 45g/mm at last
2Quantitative newsprint.The sicker clearance 20%～40% of present embodiment.
Below all by mass percentage.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. the method for a crushed news deinked pulp esterase control sicker is characterized in that comprising the steps:
(1) crushed news is mixed after, pulping in beater, control pulping concentration 15%～18% obtains 100% crushed news deinking slurry, adds NaOH, Na then
2SiO
3, H
2O
2, industrial soap and deinking agent GOD1230; Described each material addition is: NaOH 0.6%～0.75%, Na
2SiO
32.0%～2.5%, H
2O
20.4%～1.0%, industrial soap 0.5%～0.6%, deinking agent GOD1230 0.035%, regulating pH value scope is 6.5～10, and temperature is controlled at 50 ℃～60 ℃, and pulping time 30～45min obtains pulping solution; Described crushed news comprises 8# American waste paper 55%, useless glazed printing paper 8%, European waste paper 13%, homemade waste paper 16% and 10# American waste paper 8%;
(2) above-mentioned pulping solution is controlled pulp density 12%～15% in high concentration desanding device; The control pulp density is 3.5%～5% in brown stock chest; The control pulp density is 3%～5% in scalping, and the control pulp density is 1.0%～1.5% in preceding flotation cell, and adds industrial soap 0.08%～0.1%; In the heavy scummer, control pulp density 1.0%～1.5% then; The control pulp density is 1.0%～1.5% in fine screen;
(3) pulp density is 12%～15% after preceding polydisc thickener concentrates; In stock tank one, pulp density is adjusted to 5%～8%; After concentrating, Double-screen filter press make pulp density reach 25%～30%;
(4) add NaOH 0.7%～1.0%, Na in the paper pulp in floating tower
2SiO
32.0%～2.5%, H
2O
20.4%～2.0%, control pulp density 2.5%～3.0%, 65 ℃～80 ℃ of temperature, bleaching time 30～45min;
(5) in stock tank two, control pulp density 3.5%～5%; The control pulp density is 1.0%～1.5% in the flotation cell of back, adds industrial soap 0.08%～0.1%; Through after polydisc thickener slurry to concentrate the back pulp density be 8%～12%;
(6) biology enzyme is joined the exit of back polydisc thickener, the addition of biology enzyme is 0.15～0.25kg/t slurry, then in the dense standpipe reaction temperature be 50 ℃～60 ℃, pH is 7～7.5, be 45～60min action time; Paper pulp pulping in machine chest then, pulp density is controlled to be 8%～12%; Send machine room production to obtain newsprint at last; Described biology enzyme is an esterase;
Below all by mass percentage.
2. the method for a kind of 100% crushed news deinked pulp esterase control sicker according to claim 1, it is characterized in that: described biology enzyme is the Optimyze525 enzyme.
3. the method for a kind of 100% crushed news deinked pulp esterase control sicker according to claim 1 is characterized in that: described biology enzyme dilution is the biology enzyme liquid of 1%～50% mass concentration, joins the exit of back polydisc thickener again.
4. the method for a kind of 100% crushed news deinked pulp esterase control sicker according to claim 1, it is characterized in that: inlet pressure is controlled to be 250～280kPa in the described scalping, and outlet pressure is controlled to be 110～120kPa.
5. the method for a kind of 100% crushed news deinked pulp esterase control sicker according to claim 1, it is characterized in that: inlet pressure is controlled to be 170～180kPa in the described fine screen, and outlet pressure is controlled to be 150kPa.
6. the method for a kind of 100% crushed news deinked pulp esterase control sicker according to claim 1, it is characterized in that: the newsprint that described production obtains is 45g/mm
2Quantitative newsprint.
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|---|---|---|---|
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- 2008-01-24 CN CNB200810025999XA patent/CN100572658C/en not_active Expired - Fee Related
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