CN101158123B - High-strength bamboo pulp manufacturing technique - Google Patents
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- CN101158123B CN101158123B CN2007100505133A CN200710050513A CN101158123B CN 101158123 B CN101158123 B CN 101158123B CN 2007100505133 A CN2007100505133 A CN 2007100505133A CN 200710050513 A CN200710050513 A CN 200710050513A CN 101158123 B CN101158123 B CN 101158123B
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Abstract
The present invention discloses a high-strength bamboo pulp manufacturing technique which is characterized in that the high-strength bamboo pulp manufacturing technique comprises cropping, screening and removing ashes, washing, cooking, pulp separation, scrubbing purification, chlorination treatment, alkali treatment, peracetic acid oxidation treatment, H2O2 oxidation organic bleaching and bamboo runnability. The high-strength bamboo pulp manufacturing technique provided by the present invention effectively realizes using bamboo as pulpwood instead of wood and enhances the strength of the bamboo pulp so as to meet the needs of various paper properties.
Description
Technical field
The present invention relates to the manufacturing technique of the used bamboo pulp of paper-making industry, relate generally to a kind of high-strength bamboo pulp manufacturing technique.
Background technology
Along with fast development of society, living standards of the people improve constantly, and the consumption of social resources increases the natural rate of growth that has been far longer than resource, and the present resource of needs, particularly paper industry that can not satisfy social sustainable development has been tending towards deficient.In paper-making industry, past mainly is the main raw material of producing as pulp with timber, other herbaceous plant fiber is auxilliary, progressive at a high speed in society and develop today, various paper demands heighten, its qualitative performance requirements is more and more higher, require also higher to high-quality raw material, the high-quality raw material of China's paper-making industry mainly is to utilize wood pulp at present, because the first mate of social demand amount increases, and can utilize the high-quality wood raw material of exploitation to reduce year by year, with 8～10% speed increment, the import pulp total amount had reached 4,950,000 tons to the import pulp in China every year in 2005 years year by year.Because the timber resources of China is nervous relatively, domestic papermaking had turned on its prepared using the rank vegetation---the bamboo wood of renewable development already gradually, but, because there is the difference of inherent natural quality in raw material, the intrinsic strength of bamboo wood is lower than timber, the intensity of bamboo pulp is lower than wood pulp, how to improve the abundant bamboo development of china natural resources, on production technology, realize technological innovation, how to improve bamboo pulp intensity, substitute wood pulp, reduce dependence the wood pulp import with bamboo pulp, making an effort for the growth of national economy and the raising of business economic benefit, is the direction that innovation is pursued in the paper-making industry technical development.
Summary of the invention
The objective of the invention is to overcome above-mentioned technological deficiency, a kind of high-strength bamboo pulp manufacturing technique is provided.Adopt the present invention can realize effectively that the paper-making industry wood substituted by bamboo starches raw material as papermaking, can improve the intensity of bamboo pulp simultaneously, reach the needs of various paper performances.
For achieving the above object, the technical solution used in the present invention is:
High-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the 0.1-8.0% of the green oxygen of hyperbranched activity by the oven dry weight of bamboo bar joined in the water that contains sulfate, form cooked solution; The weight ratio of bamboo bar and solution is 1: 3-5; The boiling alkali charge be the over dry raw material weight 10～28%, sulphidity 10～32% is as the criterion;
Heat up: one section heating-up time 30-150min, temperature reaches 125-145 ℃, and temperature retention time is 30-150min; Two sections heating-up time 30-45min, temperature reaches 160-175 ℃, and temperature retention time is 40-70min, holding temperature: 160-175 ℃, obtains slurry;
Venting: be warmed up to 125-145 ℃ at one section, after temperature retention time reaches 10-15min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the E step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin; Chlorine dosage is the 1.0-10% of slurry oven-dry weight, the feeding time: 20～80min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 6.5-7;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 70-80 ℃, temperature retention time 60-90 minute, stripping alkali lignin under the 8-12% at pulp density;
J, washing: in the slurry that water obtains the I step
Lignin washs, and makes the pH value of slurry reach 7-8;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 35-80 ℃ and react, the use amount of peracetic acid is the 0.1-10% of slurry oven-dry weight; Slurry oven-dry weight concentration 2.0-15.0%, the reaction time: 10-150min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 7-8;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be the 0.5-3.5% of slurry oven-dry weight, slurry oven-dry weight concentration is 6.0-12.0%; The hydrogen peroxide bleaching stabilizer addition is slurry oven-dry weight 0.2-3.5%;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
During described I step alkali treatment, also added hydrogen peroxide when adding caustic soda, the addition of hydrogen peroxide is the 0.5-1% of slurry oven-dry weight.
The invention has the advantages that:
1, among the present invention, adopts sulfate to add the green oxygen digesting assistant of hyperbranched activity, when boiling, press 0.1～8.0% of slurry over dry bamboo material weight and add, improved cooking of pulp intensity.
2, the present invention adopts sulphate cook venting, is to carry out under fixed temperature, and whole digestion process only discharges once, improves in production efficiency simultaneously.
3, adopt the peracetic acid oxidation among the present invention, its effect is that stripping for hydrogen peroxide bleaching creates conditions, has been avoided the violent degraded of the bleaching of hypochlorite to fiber with reaction such as lignin, coloring matter, thereby has improved the intensity of paper pulp greatly.
4, the present invention utilizes the green oxygen auxiliary agent of hyperbranched activity and adopt the effect of peracetic acid bleaching assistant in multistage bleaching technology in boiling, guarantee that the section of bleaching cancelled the bleaching of hypochlorite, reduction is to the degradation of fiber effect, improve bamboo pulp fiber intensity, its benefit mainly is presented as: when producing high-intensity packing or other manila paper, can play the effect of wood substituted by bamboo, reduce or cancel the adding of wood pulp fibre, reduction is contributed for enterprise increases economic benefit because of the increase of wood pulp adding cost; In the cultural paper production process, because the lifting of slurry intensity, can improve strength of paper greatly with same paper production technology, so that the paper strength quality is superfluous greatly, guarantee the paper quality stably reaching standard situation under, can in the production process of follow-up paper, improve the adding of filler, thereby reduce the slurry consumption of paper.In addition, the increase of filling adding amount improves the retention of filler naturally, has also reached raising paper formation degree, smoothness,, the effect of printing performance, bring huge space for the lifting of paper quality.
The specific embodiment
Embodiment 1:
High-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the green oxygen of hyperbranched activity is joined in the water that contains sulfate by 0.1% of the oven dry weight of bamboo bar, form cooked solution; The weight ratio of bamboo bar and solution is 1: 3; The boiling alkali charge be the over dry raw material weight 10%, sulphidity 10% is as the criterion;
Heat up: one section heating-up time 30min, temperature reaches 125 ℃, and temperature retention time is 30min; Two sections heating-up time 30min, temperature reaches 160 ℃, and temperature retention time is 40min, holding temperature: 160 ℃, obtain slurry;
Venting: be warmed up to 125 ℃ at one section, after temperature retention time reaches 10min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the E step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin, and chlorine dosage is 1% of a slurry oven-dry weight, the feeding time: 20min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 6.5;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 70 ℃, temperature retention time for 8% time 60 minutes, the stripping alkali lignin at slurry concentration; During alkali treatment, can also add hydrogen peroxide when adding caustic soda in this step, the addition of hydrogen peroxide is 0.5% of a slurry oven-dry weight.
J, washing: the alkali lignin in the slurry that water obtains the I step washs, and makes the pH value of slurry reach 7;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 35 ℃ and react, the use amount of peracetic acid is 0.1% of a slurry oven-dry weight; Slurry oven-dry weight concentration 2.0%, the reaction time: 10min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 7;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be 0.5% of slurry oven-dry weight, slurry oven-dry weight concentration is 6%; The hydrogen peroxide bleaching stabilizer addition is a slurry oven-dry weight 0.2%;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
Embodiment 2:
High-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the green oxygen of hyperbranched activity is joined in the water that contains sulfate by 8.0% of the oven dry weight of bamboo bar, form cooked solution; The weight ratio of bamboo bar and solution is 1: 5; The boiling alkali charge be the over dry raw material weight 28%, sulphidity 32% is as the criterion;
Heat up: one section heating-up time 150min, temperature reaches 145 ℃, and temperature retention time is 150min; Two sections heating-up time 45min, temperature reaches 175 ℃, and temperature retention time is 70min, holding temperature: 175 ℃, obtain slurry;
Venting: be warmed up to 145 ℃ at one section, after temperature retention time reaches 15min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the E step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin, and chlorine dosage is 10% of a slurry oven-dry weight, the feeding time: 80min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 7;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 80 ℃, temperature retention time for 12% time 90 minutes, the stripping alkali lignin at slurry concentration; During alkali treatment, can also add hydrogen peroxide when adding caustic soda in this step, the addition of hydrogen peroxide is 1% of a slurry oven-dry weight.
J, washing: the alkali lignin in the slurry that water obtains the I step washs, and makes the pH value of slurry reach 8;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 35-80 ℃ and react, the use amount of peracetic acid is 10% of a slurry oven-dry weight; Slurry oven-dry weight concentration 15.0%, the reaction time: 150min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 8;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be 3.5% of slurry oven-dry weight, slurry oven-dry weight concentration is 12.0%; The hydrogen peroxide bleaching stabilizer addition is 3.5% of a slurry oven-dry weight;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
Embodiment 3:
High-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the green oxygen of hyperbranched activity is joined in the water that contains sulfate by 4% of the oven dry weight of bamboo bar, form cooked solution; The weight ratio of bamboo bar and solution is 1: 4; The boiling alkali charge be the over dry raw material weight 20%, sulphidity 10～32% is as the criterion;
Heat up: one section heating-up time 100min, temperature reaches 130 ℃, and temperature retention time is 100min; Two sections heating-up time 35min, temperature reaches 165 ℃, and temperature retention time is 55min, holding temperature: 165 ℃, obtain slurry;
Venting: be warmed up to 130 ℃ at one section, after temperature retention time reaches 12min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the E step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin, and chlorine dosage is 4% of a slurry oven-dry weight, the feeding time: 50min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 6.5;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 75 ℃, temperature retention time for 10% time 75 minutes, the stripping alkali lignin at slurry concentration; During alkali treatment, can also add hydrogen peroxide when adding caustic soda in this step, the addition of hydrogen peroxide is 0.8% of a slurry oven-dry weight.
J, washing: the alkali lignin in the slurry that water obtains the I step washs, and makes the pH value of slurry reach 7;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 55 ℃ and react, the use amount of peracetic acid is 4% of a slurry oven-dry weight; Slurry oven-dry weight concentration 8%, the reaction time: 70min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 7;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be 2% of slurry oven-dry weight, slurry oven-dry weight concentration is 8%; The hydrogen peroxide bleaching stabilizer addition is a slurry oven-dry weight 2%;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
Embodiment 4:
High-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the green oxygen of hyperbranched activity is joined in the water that contains sulfate by 5% of the oven dry weight of bamboo bar, form cooked solution; The weight ratio of bamboo bar and solution is 1: 4.5; The boiling alkali charge be the over dry raw material weight 15%, sulphidity 30% is as the criterion;
Heat up: one section heating-up time 30～150min, temperature reaches 135 ℃, and temperature retention time is 80min; Two sections heating-up time 40min, temperature reaches 175 ℃, and temperature retention time is 60min, holding temperature: 175 ℃, obtain slurry;
Venting: be warmed up to 130 ℃ at one section, after temperature retention time reaches 15min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the E step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin, and chlorine dosage is 6% of a slurry oven-dry weight, the feeding time: 40min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 7;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 80 ℃, temperature retention time for 9% time 85 minutes, the stripping alkali lignin at slurry concentration; During alkali treatment, can also add hydrogen peroxide when adding caustic soda in this step, the addition of hydrogen peroxide is 0.7% of a slurry oven-dry weight.
J, washing: the alkali lignin in the slurry that water obtains the I step washs, and makes the pH value of slurry reach 8;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 60 ℃ and react, the use amount of peracetic acid is 7% of a slurry oven-dry weight; Slurry oven-dry weight concentration 9%, the reaction time: 30min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 8;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be 3% of slurry oven-dry weight, slurry oven-dry weight concentration is 6%; The hydrogen peroxide bleaching stabilizer addition is a slurry oven-dry weight 1.5%;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
Embodiment 5:
High-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the green oxygen of hyperbranched activity is joined in the water that contains sulfate by 0.1% of the oven dry weight of bamboo bar, form cooked solution; The weight ratio of bamboo bar and solution is 1: 5; The boiling alkali charge be the over dry raw material weight 10%, sulphidity 32% is as the criterion;
Heat up: one section heating-up time 30min, temperature reaches 145 ℃, and temperature retention time is 30min; Two sections heating-up time 45min, temperature reaches 160 ℃, and temperature retention time is 70min, holding temperature: 160 ℃, obtain slurry;
Venting: be warmed up to 145 ℃ at one section, after temperature retention time reaches 10min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the E step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin, and chlorine dosage is 1% of a slurry oven-dry weight, the feeding time: 15min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 6.5;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 80 ℃, temperature retention time for 12% time 75 minutes, the stripping alkali lignin at slurry concentration; During alkali treatment, can also add hydrogen peroxide when adding caustic soda in this step, the addition of hydrogen peroxide is 0.6% of a slurry oven-dry weight.
J, washing: the alkali lignin in the slurry that water obtains the I step washs, and makes the pH value of slurry reach 8;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 80 ℃ and react, the use amount of peracetic acid is 0.3% of a slurry oven-dry weight; Slurry oven-dry weight concentration 10%, the reaction time: 150min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 8;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be 2.5% of slurry oven-dry weight, slurry oven-dry weight concentration is 5%; The hydrogen peroxide bleaching stabilizer addition is a slurry oven-dry weight 2.5%;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
Embodiment 6:
High-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the green oxygen of hyperbranched activity is joined in the water that contains sulfate by 7% of the oven dry weight of bamboo bar, form cooked solution; The weight ratio of bamboo bar and solution is 1: 4.5; The boiling alkali charge be the over dry raw material weight 28%, sulphidity 18% is as the criterion;
Heat up: one section heating-up time 110min, temperature reaches 140 ℃, and temperature retention time is 150min; Two sections heating-up time 30min, temperature reaches 170 ℃, and temperature retention time is 70min, holding temperature: 170 ℃, obtain slurry;
Venting: be warmed up to 140 ℃ at one section, after temperature retention time reaches 15min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the F step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin, and chlorine dosage is 5% of a slurry oven-dry weight, the feeding time: 35min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 7;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 80 ℃, temperature retention time for 11% time 80 minutes, the stripping alkali lignin at slurry concentration; During alkali treatment, can also add hydrogen peroxide when adding caustic soda in this step, the addition of hydrogen peroxide is 1% of a slurry oven-dry weight.
J, washing: the alkali lignin in the slurry that water obtains the I step washs, and makes the pH value of slurry reach 8;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 65 ℃ and react, the use amount of peracetic acid is 7% of a slurry oven-dry weight; Slurry oven-dry weight concentration 12.5%, the reaction time: 90min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 8;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be 3.5% of slurry oven-dry weight, slurry oven-dry weight concentration is 12.0%; The hydrogen peroxide bleaching stabilizer addition is a slurry oven-dry weight 3.5%;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
Claims (2)
1. high-strength bamboo pulp manufacturing technique is characterized in that: described high-intensity bamboo pulp manufacturing technique comprises blank, screens ash disposal, washes material, boiling, intensification, venting, slurries separation, washing, purifying, chloridized, alkali treatment, peracetic acid oxidation processes, H
2O
2Organic bleaching, bamboo pulp are manufactured paper with pulp, and its concrete steps are:
A, blank: will form the bamboo bar behind the bamboo cutting;
B, screening ash disposal: the bamboo bar that the A step is obtained screens, and removes bamboo ash, bamboo bits;
C, wash material: the bamboo bar that the B step is obtained carries out the dust washing;
D, boiling, intensification, venting:
Boiling: the bamboo bar that the C step obtains is put into the water that contains sulfate, simultaneously the 0.1-8.0% of the green oxygen of hyperbranched activity by the oven dry weight of bamboo bar joined in the water that contains sulfate, form cooked solution; The weight ratio of bamboo bar and solution is 1: 3-5; The boiling alkali charge be the over dry raw material weight 10～28%, sulphidity 10～32% is as the criterion;
Heat up: one section heating-up time 30-150min, temperature reaches 125-145 ℃, and temperature retention time is 30-150min; Two sections heating-up time 30-45min, temperature reaches 160-175 ℃, and temperature retention time is 40-70min, holding temperature: 160-175 ℃, obtains slurry;
Venting: be warmed up to 125-145 ℃ at one section, after temperature retention time reaches 10-15min, exit;
E, slurries separate: the slurry that the D step is obtained and the black liquid separation of boiling generation;
F, washing, purifying: the slurry that the E step is obtained washs, and removes the fiber impurity and the mineral impurity that can not utilize simultaneously;
G, chlorination: the slurry that the F step is obtained mixes with liquid chlorine, and making the lignin conversion in the slurry is chlorlignin; Chlorine dosage is the 1.0-10% of slurry oven-dry weight, the feeding time: 20～80min;
H, washing: hydrochloric acid and chlorlignin in the slurry that water obtains the G step wash, and make the pH value of slurry reach 6.5-7;
I, alkali treatment: adding caustic soda in the slurry that the H step obtains, is to be warming up to 70-80 ℃, temperature retention time 60-90 minute, stripping alkali lignin under the 8-12% at pulp density;
J, washing: the alkali lignin in the slurry that water obtains the I step washs, and makes the pH value of slurry reach 7-8;
K, peracetic acid oxidation processes: add peracetic acid in the slurry that the J step obtains, be warming up to 35-80 ℃ and react, the use amount of peracetic acid is the 0.1-10% of slurry oven-dry weight; Slurry oven-dry weight concentration 2.0-15.0%, the reaction time: 10-150min;
L, washing: water washs the slurry that the K step obtains, and makes the pH value of slurry reach 7-8;
M, H
2O
2Organic bleaching: adding hydrogen peroxide and hydrogen peroxide bleaching stabilizer are bleached H to paper pulp in the slurry that the L step obtains
2O
2Consumption be the 0.5-3.5% of slurry oven-dry weight, slurry oven-dry weight concentration is 6.0-12.0%; The hydrogen peroxide bleaching stabilizer addition is slurry oven-dry weight 0.2-3.5%;
N, slurry are manufactured paper with pulp: manufacture paper with pulp and cut into the sheet pulpboard, obtain folding strength 〉=100 time, tear index 〉=20mN.m
2/ g, whiteness 〉=80ISO, moisture 10.0 ± 2.5%, constant volume weight 300-1000g/m
3Bamboo pulp.
2. high-strength bamboo pulp manufacturing technique according to claim 1 is characterized in that: during described I step alkali treatment, also added hydrogen peroxide when adding caustic soda, the addition of hydrogen peroxide is the 0.5-1% of slurry oven-dry weight.
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| CN102121205B (en) * | 2010-12-21 | 2012-03-21 | 张金 | Wood and bamboo fiber mercerizing pulp and preparation method thereof |
| CN103541022B (en) * | 2013-11-06 | 2016-04-20 | 济南圣泉集团股份有限公司 | Porous corn cob fiber and preparation method thereof |
| CN106930130A (en) * | 2017-03-11 | 2017-07-07 | 刘洁 | A kind of Physical pulping and papermaking method |
| CN111035018A (en) * | 2019-12-20 | 2020-04-21 | 长沙理工大学 | Comprehensive utilization method of rice bran |
| CN112813713B (en) * | 2021-01-07 | 2022-12-27 | 山东鸿泰鼎新材料科技有限公司 | Preparation method of special pulp for producing lyocell fibers from bamboo willows |
| CN114808508B (en) * | 2022-03-21 | 2022-12-16 | 华南理工大学 | Insulating paste and preparation method thereof |
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| GB1059282A (en) * | 1963-02-04 | 1967-02-15 | Monsanto Co | Production of cellulosic fibre pulp |
| US4857145A (en) * | 1987-07-13 | 1989-08-15 | Process Evaluation And Development Corporation | Process for making a pulp from bamboo |
| CN1410626A (en) * | 2002-09-16 | 2003-04-16 | 成都春天绿竹资源开发有限责任公司 | Production technology of pure natural antibacterial bamboo paste |
| CN1970850A (en) * | 2006-10-25 | 2007-05-30 | 宜宾丝丽雅股份有限公司 | Method for making bamboo pulp for use in preparation of artificial fiber |
| CN1974921A (en) * | 2006-12-18 | 2007-06-06 | 河北吉藁化纤有限责任公司 | Method for producing bamboo pomace |
| CN101046003A (en) * | 2007-04-06 | 2007-10-03 | 山东海龙股份有限公司 | Process of producing viscose fiber with bamboo material |
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Patent Citations (6)
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|---|---|---|---|---|
| GB1059282A (en) * | 1963-02-04 | 1967-02-15 | Monsanto Co | Production of cellulosic fibre pulp |
| US4857145A (en) * | 1987-07-13 | 1989-08-15 | Process Evaluation And Development Corporation | Process for making a pulp from bamboo |
| CN1410626A (en) * | 2002-09-16 | 2003-04-16 | 成都春天绿竹资源开发有限责任公司 | Production technology of pure natural antibacterial bamboo paste |
| CN1970850A (en) * | 2006-10-25 | 2007-05-30 | 宜宾丝丽雅股份有限公司 | Method for making bamboo pulp for use in preparation of artificial fiber |
| CN1974921A (en) * | 2006-12-18 | 2007-06-06 | 河北吉藁化纤有限责任公司 | Method for producing bamboo pomace |
| CN101046003A (en) * | 2007-04-06 | 2007-10-03 | 山东海龙股份有限公司 | Process of producing viscose fiber with bamboo material |
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