CN103924475B - A kind of method utilizing gramineous straw to prepare true qualities paper pulp - Google Patents
A kind of method utilizing gramineous straw to prepare true qualities paper pulp Download PDFInfo
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- CN103924475B CN103924475B CN201410187564.0A CN201410187564A CN103924475B CN 103924475 B CN103924475 B CN 103924475B CN 201410187564 A CN201410187564 A CN 201410187564A CN 103924475 B CN103924475 B CN 103924475B
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- paper pulp
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Abstract
The invention discloses a kind of method utilizing gramineous straw to prepare true qualities paper pulp, by through opening agent gramineous straw dipped in advance for profit that raw material form adopt high-density paste mill once to grind pulping with ethylene glycol, NaOH, glycerine, then through washing, screen, purified treatment concentrates pulping.Present invention process is simple, gained paper pulp yield is high, drainability good, intensity is large, cost is low, and pulping process does not need extra heating, and energy consumption is low, sewage flow rate is few and institute's sewer is easy to process, the true qualities paper pulp that prepared paper pulp can be applicable to paper mould manufacture, paper for daily use manufactures.
Description
Technical field
The invention belongs to stalk slurrying field, be specifically related to a kind of method utilizing gramineous straw to prepare true qualities paper pulp.
Background technology
Along with the continuous expansion of paper industry, constantly opening up of pulp applications is wide, originally as the timber of main paper making raw material, supply falls short of demand gradually, cause forest overcut, influence ecological environment, on the other hand, agricultural crop straw as inexhaustible resource but because the utilization that can not get effective science causes a large amount of waste.
Existing stalk slurrying majority is white slurry, production technology is all chemical method, its principle is decomposed by chemical agent by the compositions such as the lignin in stalk, retain fiber, the compositions such as the lignin decomposed run off with pulp-making waste-water, conventional chemical agent is as caustic soda, Anthraquinones auxiliary agent and hypochlorite etc., because consumption is very large, so become the main pollution source of papermaking wastewater, the simultaneously not only composition such as xylogen degradation in degradation process, also there is quite a few fiber can divide to take off simultaneously, reduce yield, cause the waste of raw material; In addition, chemical degradative processes needs High Temperature High Pressure, and therefore observable index is higher.The current technique having occurred some stalk true qualities slurrying, its essence or chemical method boiling, decompose lignin, just change original technique at bleaching stage, such as instead of tri-stage bleaching with oxygen delignification, the whiteness of pulping is reduced greatly, but bleaching process is more serious to fibre damage, cause beating degree higher, affect the result of use of molding.
Summary of the invention
For prior art Problems existing, the invention provides a kind of method utilizing gramineous straw to prepare true qualities paper pulp, by through opening agent gramineous straw dipped in advance for profit that raw material form adopt high-density paste mill once to grind pulping with ethylene glycol, NaOH, glycerine, then through washing, screen, purified treatment concentrates pulping.Present invention process is simple, gained paper pulp yield is high, drainability good, intensity is large, cost is low, and pulping process does not need extra heating, and energy consumption is low, sewage flow rate is few and institute's sewer is easy to process, the true qualities paper pulp that prepared paper pulp can be applicable to paper mould manufacture, paper for daily use manufactures.
The concrete technical scheme of the present invention is:
Utilize gramineous straw to prepare a method for true qualities paper pulp, concrete steps are as follows:
(1) water is warmed to 50-80 DEG C, adds a profit agent, be mixed with presoak, for subsequent use;
(2) be 2-5cm by straw cutting, be delivered in presoak and soak, dehydration;
(3) stalk obtained that step (2) dewatered grinds, and obtains and slightly starches;
(4) slightly starched by step (3) gained and carry out washing, screening, press filtration obtains filter cake, i.e. true qualities paper pulp.
Step (1) described profit is opened agent and is made up of sodium hydroxide solution, ethylene glycol and glycerine.
The mass percent of described sodium hydroxide solution is 10%-35%.
Because NaOH with the lignin reaction in stalk, from reducing costs consideration, can adopt sodium hydroxide solution can slough part lignin, contributing to stalk and softening; Described glycerine is a kind of material being relatively applicable to stalk fibre profit, and can abundant natural degradation, contributes to the nature place of preimpregnation waste water; Described ethylene glycol, as the solvent of glycerine, can make glycerine disperse in presoak fully, make process even, and ethylene glycol is also belong to polyhydroxy substance, also has certain profit Zhang Zuoyong.
The percetage by weight that the addition of described sodium hydroxide solution accounts for over dry stalk is 1%-5%, and the percetage by weight that the addition of described ethylene glycol accounts for over dry stalk is 0.1%-0.4%, and the percetage by weight that the addition of described glycerine accounts for over dry stalk is 0.05%-0.3%.The profit of such composition is opened agent and stalk fibre just can be made to moisten Zhang Pengsong completely, the yield of guarantee paper pulp and quality.
Step (2) described stalk is gramineous straw, is preferably one or more in wheat straw waste or reed straw or rice straw.
In order to reinforced convenience, soak evenly, save energy consumption, be that 2-5cm is delivered in soak and soaks by straw cutting, its objective is and make stalk fibre moisten Zhang Pengsong.
The described stalk weight of step (2) and presoak volume t/m
3ratio be 1:5-10.Stalk can be made like this to soak profit Zhang Pengsong completely, contribute to follow-up grinding.If stalk is too much, then stalk soaks not exclusively, will affect follow-up grinding, and even affect paper pulp yield and quality; If soak is too much, then cause the waste of raw material.
First the addition of step (1) described water calculates profit respectively to rise the addition of each component in agent according to rise percetage by weight that each component in agent accounts for over dry stalk of profit, then deducted the addition of moistening each component in agent of rising by the weight of presoak, be the addition of water.
Step (2) described soaking temperature is 50 DEG C-80 DEG C.Soak at such temperatures, stalk fibre just can be made to moisten Zhang Pengsong completely.If temperature is too high, then cause energy consumption to waste, if temperature is too low, then do not reach the effect of immersion.
Step (2) described soak time is 50min-70min, preferred 60min.If long soaking time, then increase the production cycle, increase energy consumption, if soak time is too short, then stalk fibre can not be made to moisten Zhang Pengsong, affect paper pulp yield and quality.
The equipment that the described dehydration of step (2) adopts is inclined helix dehydrator, and be existing equipment, dehydration mentioned here is natural-dehydration, and the material concentration entering equipment is 2%-5%, and the material concentration after dehydration is 16%-23%.
The equipment grinding employing described in step (3) is high-density paste mill, is existing equipment, and its model is YC-600.
Described in step (4), washing opens agent to wash residual profit off, and the water lotion obtained after described washing is delivered to dosing operation, can be used for preparing presoak, supplements the presoak reduced.
The equipment screening employing described in step (4) is closed rotary-wing pressure sieve, is commonly called as pressurized screen, and be papermaking common equipment, its screening concentration is 1%-3%.Here concentration 1% refers to containing paper pulp 10Kg in 1 cubic metre of pulp solution, and concentration 3% refers in 1 cubic metre of pulp solution containing paper pulp 30Kg.The inlet outlet pressure differential of described closed rotary-wing pressure sieve is 0.1-0.3MPa, is preferably 0.2MPa.
The equipment that press filtration described in step (4) adopts is Double-screen filter press, and it enters to starch concentration is 3%-5%, and concentration here 3% refers to containing paper pulp 30Kg in 1 cubic metre of pulp solution, and concentration 5% refers in 1 cubic metre of pulp solution containing paper pulp 50Kg.
Institute's sewer is discharged from raw material preimpregnation, due to the stalk residue that the major pollutants contained are silt and loss, solid content is tackled by coarse filtration, burning disposal together with mixing with coal, main matter after burning is carbon dioxide and water, pollution-free, remaining sewage can reach discharge standard by cesspool autoxidation degraded in about 7 days, and its COD is 60mg/L.
Present invention process is simple, gained paper pulp yield is high, drainability good, intensity is large, cost is low, and pulping process does not need extra heating, and energy consumption is low, sewage flow rate is few and institute's sewer is easy to process, the true qualities paper pulp that prepared paper pulp can be applicable to paper mould manufacture, paper for daily use manufactures.
Detailed description of the invention
Embodiment 1
Utilize gramineous straw to prepare a method for true qualities paper pulp, concrete steps are as follows:
(1) water is warmed to 50 DEG C, adds a profit agent, be mixed with 5m
3presoak, for subsequent use;
(2) 1t wheat straw waste is cut to 2cm, is delivered to 5m
3presoak in, at temperature is 50 DEG C, soak 50min, adopt inclined helix dehydrator dewater;
(3) wheat straw waste obtained that step (2) dewatered adopts high-density paste mill to grind, and obtains and slightly starches;
(4) slightly starched by step (3) gained and wash, adopt the pressurized screen that screening concentration is 1%, inlet outlet pressure differential is 0.1MPa to screen, the Double-screen filter press that to adopt into slurry concentration be 3% carries out press filtration, obtains filter cake, i.e. true qualities paper pulp.
Step (1) described profit is opened agent and is made up of sodium hydroxide solution 10Kg, ethylene glycol 1Kg and glycerine 0.5Kg.
The mass percent of described sodium hydroxide solution is 10%.
The performance of gained finished pulp is: fracture length 4.5km, beating degree 15
osR, yield 52.5%.
Embodiment 2
Utilize gramineous straw to prepare a method for true qualities paper pulp, concrete steps are as follows:
(1) water is warmed to 80 DEG C, adds a profit agent, be mixed with 10m
3presoak, for subsequent use;
(2) 1t reed straw is cut to 5cm, is delivered to 10m
3presoak in, at temperature is 80 DEG C, soak 70min, adopt inclined helix dehydrator dewater;
(3) reed straw obtained that step (2) dewatered adopts high-density paste mill to grind, and obtains and slightly starches;
(4) slightly starched by step (3) gained and wash, adopt the pressurized screen that screening concentration is 3%, inlet outlet pressure differential is 0.3MPa to screen, the Double-screen filter press that to adopt into slurry concentration be 5% carries out press filtration, obtains filter cake, i.e. true qualities paper pulp.
Step (1) described profit is opened agent and is made up of sodium hydroxide solution 50Kg, ethylene glycol 4Kg and glycerine 3Kg.
The mass percent of described sodium hydroxide solution is 35%.
The performance of gained finished pulp is: fracture length 5km, beating degree 14
osR, yield 55%.
Embodiment 3
Utilize gramineous straw to prepare a method for true qualities paper pulp, concrete steps are as follows:
(1) water is warmed to 65 DEG C, adds a profit agent, be mixed with 8m
3presoak, for subsequent use;
(2) 1t rice straw is cut to 3cm, is delivered to 8m
3presoak in, at temperature is 65 DEG C, soak 60min, adopt inclined helix dehydrator dewater;
(3) rice straw obtained that step (2) dewatered adopts high-density paste mill to grind, and obtains and slightly starches;
(4) slightly starched by step (3) gained and wash, adopt the pressurized screen that screening concentration is 2%, inlet outlet pressure differential is 0.2MPa to screen, the Double-screen filter press that to adopt into slurry concentration be 4% carries out press filtration, obtains filter cake, i.e. true qualities paper pulp.
Step (1) described profit is opened agent and is made up of sodium hydroxide solution 30Kg, ethylene glycol 2Kg and glycerine 1Kg.
The mass percent of described sodium hydroxide solution is 20%.
The performance of gained finished pulp is: fracture length 5.5km, beating degree 13.4
osR, yield 57.8%.
Embodiment 4
Utilize gramineous straw to prepare a method for true qualities paper pulp, concrete steps are as follows:
(1) water is warmed to 70 DEG C, adds a profit agent, be mixed with 6m
3presoak, for subsequent use;
(2) 1t wheat straw waste and reed straw are cut to 4cm, are delivered to 6m
3presoak in, at temperature is 70 DEG C, soak 65min, adopt inclined helix dehydrator dewater;
(3) step (2) the dewatered wheat straw waste obtained and reed straw adopts high-density paste mill to grind, and obtains and slightly starches;
(4) slightly starched by step (3) gained and wash, adopt the pressurized screen that screening concentration is 1%, inlet outlet pressure differential is 0.3MPa to screen, the Double-screen filter press that to adopt into slurry concentration be 3% carries out press filtration, obtains filter cake, i.e. true qualities paper pulp.
Step (1) described profit is opened agent and is made up of sodium hydroxide solution 40Kg, ethylene glycol 3Kg and glycerine 2Kg.
The mass percent of described sodium hydroxide solution is 25%.
The performance of gained finished pulp is: fracture length 5.4km, beating degree 14.3
oSR, yield 56%.
Embodiment 5
Utilize gramineous straw to prepare a method for true qualities paper pulp, concrete steps are as follows:
(1) water is warmed to 75 DEG C, adds a profit agent, be mixed with 7m
3presoak, for subsequent use;
(2) 1t wheat straw waste, reed straw and rice straw are cut to 3cm, are delivered to 7m
3presoak in, at temperature is 75 DEG C, soak 55min, adopt inclined helix dehydrator dewater;
(3) wheat straw waste, reed straw and the rice straw obtained that step (2) dewatered adopts high-density paste mill to grind, and obtains and slightly starches;
(4) slightly starched by step (3) gained and wash, adopt the pressurized screen that screening concentration is 2%, inlet outlet pressure differential is 0.2MPa to screen, the Double-screen filter press that to adopt into slurry concentration be 4% carries out press filtration, obtains filter cake, i.e. true qualities paper pulp.
Step (1) described profit is opened agent and is made up of sodium hydroxide solution 20Kg, ethylene glycol 2Kg and glycerine 1.5Kg.
The mass percent of described sodium hydroxide solution is 30%.
The performance parameter of gained finished pulp is: fracture length 5.6km, beating degree 13.7
osR, yield 57%.
Paper pulp in existing industry is generally white slurry, and its performance parameter is: fracture length is at 3500-4000m, and beating degree is 28
osR, yield is 40%, because existing paper pulp is produced for papermaking application, so require higher to white background, but relatively more serious to fibre damage in bleaching process, cause beating degree higher, so existing paper pulp is used for manufacturing moulding article, the result of use of molding will be affected.
The true qualities paper pulp that embodiment 1-5 adopts gramineous straw to prepare, paper mould manufacture, paper for daily use manufacture can be applicable to, be particularly useful for paper mould manufacture, beating degree is low, easy dehydration, reduce the oven dry cost in paper mould manufacturing technique, yield is high, reduces the production cost of paper pulp.
Claims (4)
1. utilize gramineous straw to prepare a method for true qualities paper pulp, it is characterized in that: concrete steps are as follows:
(1) water is warmed to 50-80 DEG C, adds a profit agent, be mixed with presoak, for subsequent use;
(2) be 2-5cm by straw cutting, be delivered in presoak and soak, dehydration;
(3) stalk obtained that step (2) dewatered grinds, and obtains and slightly starches;
(4) step (3) gained is slightly starched carry out washing, screening, press filtration, obtain filter cake, i.e. true qualities paper pulp;
Step (1) described profit is opened agent and is made up of sodium hydroxide solution, ethylene glycol and glycerine;
The percetage by weight that the addition of described sodium hydroxide solution accounts for over dry stalk is 1%-5%, and the percetage by weight that the addition of described ethylene glycol accounts for over dry stalk is 0.1%-0.4%, and the percetage by weight that the addition of described glycerine accounts for over dry stalk is 0.05%-0.3%;
The mass percent of described sodium hydroxide solution is 10%-35%;
Step (2) described soaking temperature is 50 DEG C-80 DEG C, and soak time is 50min-70min;
Step (2) described stalk is one or more in wheat straw waste or reed straw or rice straw;
The described stalk weight of step (2) and presoak volume t/m
3ratio be 1:5-10.
2. the method utilizing gramineous straw to prepare true qualities paper pulp according to claim 1, is characterized in that: step (2) described soak time is 60min.
3. the method utilizing gramineous straw to prepare true qualities paper pulp according to claim 1, is characterized in that: the equipment screening employing described in step (4) is closed rotary-wing pressure sieve, and its screening concentration is 1%-3%, and inlet outlet pressure differential is 0.1MPa-0.3MPa.
4. the method utilizing gramineous straw to prepare true qualities paper pulp according to claim 1, is characterized in that: the equipment that press filtration described in step (4) adopts is Double-screen filter press, and it enters to starch concentration is 3%-5%.
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| CN201410187564.0A CN103924475B (en) | 2014-05-06 | 2014-05-06 | A kind of method utilizing gramineous straw to prepare true qualities paper pulp |
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| CN103924475B true CN103924475B (en) | 2016-02-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049148B (en) * | 2016-05-27 | 2018-04-03 | 刘长如 | The cold stain slurrying of grass family class and bleaching process |
| CN106012633B (en) * | 2016-05-27 | 2018-05-29 | 刘长如 | Broad-leaved class clean pulping process |
| CN114032701A (en) * | 2021-11-29 | 2022-02-11 | 广东省汇林包装科技集团有限公司 | Preparation method and application of straw semi-pulping raw material |
| CN115652675A (en) * | 2022-10-31 | 2023-01-31 | 齐鲁工业大学 | Bio-mechanical pulping method using compound microorganism and product |
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| CN101148830A (en) * | 2006-09-19 | 2008-03-26 | 中国科学院过程工程研究所 | Method for separating straw components by carrying steam explosion-microwave coupling treatment to plant straw |
| CN101987473A (en) * | 2010-04-15 | 2011-03-23 | 洛阳理工学院 | Method for making package materials from straws |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148830A (en) * | 2006-09-19 | 2008-03-26 | 中国科学院过程工程研究所 | Method for separating straw components by carrying steam explosion-microwave coupling treatment to plant straw |
| CN101987473A (en) * | 2010-04-15 | 2011-03-23 | 洛阳理工学院 | Method for making package materials from straws |
| CN103343468A (en) * | 2013-07-03 | 2013-10-09 | 深圳市美中现代科技发展有限公司 | Clean production technology based on steam explosion slurrying |
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Effective date of registration: 20180926 Address after: 257300 Hua Guan Hua Guan Cun, Guangrao County, Dongying, Shandong Patentee after: Shandong Ma Wei Di Environmental Protection Technology Co.,Ltd. Address before: 257343 Hua Guan Town, Guangrao County, Dongying, Shandong Patentee before: DONGYING KANGSEN STRAW PRODUCTS Co.,Ltd. |
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Address after: 257300 Hua Guan Hua Guan Cun, Guangrao County, Dongying, Shandong Patentee after: Dongying Maiwadi Environmental Protection Technology Co.,Ltd. Address before: 257300 Hua Guan Hua Guan Cun, Guangrao County, Dongying, Shandong Patentee before: Shandong Ma Wei Di Environmental Protection Technology Co.,Ltd. |
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