CN1546788A - Pulp and paper making process of vert material continuous and intermittent steaming and cooking - Google Patents
Pulp and paper making process of vert material continuous and intermittent steaming and cooking Download PDFInfo
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- CN1546788A CN1546788A CNA2003101055662A CN200310105566A CN1546788A CN 1546788 A CN1546788 A CN 1546788A CN A2003101055662 A CNA2003101055662 A CN A2003101055662A CN 200310105566 A CN200310105566 A CN 200310105566A CN 1546788 A CN1546788 A CN 1546788A
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Abstract
The invention is a kind of continuous and intermittent steaming compound pulping and paper-making process with grass material. The process includes mechanical process, confecting and continuous steaming to the grass material, mechanical process, steaming to the woody material. The character lies in: the material is transmitted to desiccation mechanism to be dehydrated through transmitter after being cleaned, then the invention carries on confecting and continuous steaming in the steaming device; the processed woody material is steamed intermittently with rotary spherical digester after belong confected, the raw paper pulp and grass raw paper pulp are mixed in the ejection cab. Then the invention carries on cleaning, bleaching to the mixed pulp, then makes the paper with normal process. The invention upgrades the quality standards of paper, reduces the quantity of black liquid and the pulp cleaning difficulty.
Description
Technical field
The invention belongs to draft and xylophyta pulping process technical field, relate in particular to draft and xylophyta jointly as the new technology of pulping raw material papermaking as pulping raw material.
Background technology
The raw material that China's paper-making pulping industry is at present used mainly is xylophytas such as herbaceous plant such as wheat straw, bagasse, reed or timber, because the forest tree resource scarcity of China, the advantage that has large agricultural country again, very ripe at home with herbaceous plant as the technology of paper pulp raw material, currently used wet laid furnishes pulping process can be eliminated the influence of impurity in the raw material, and process stabilizing, therefore adopt herbaceous plant such as wheat straw, bagasse as the pulping raw material trend that is inevitable.
But also there is certain shortcoming in the herbaceous plant papermaking, generally the chemical pulping method of Shi Yonging is produced careless class chemical pulp and can be produced a large amount of black liquids, because this black liquor has shortcomings such as viscosity height, content of organics is low, silicone content is high, calorific value is low, be difficult to effective recycling, cause serious environmental to pollute.The pulp washing difficulty of vegetation slurry is big simultaneously, and the slurry layer thickness can not be too high, otherwise influence pulp washing efficient and quality, and the too thin black liquor output that can cause of slurry layer increases.In addition, paper strength and the whiteness that all adopts the draft slurry to produce is all low than wood pulp paper.
Mix the part wood pulp and can improve the performance of paper product in straw pulp, improve strength of paper and whiteness, but because timber and herbal physics and chemical property differ bigger, it is infeasible that timber and blade mix the technology of back slurrying.
Summary of the invention
The purpose of this invention is to provide a kind of is raw material with herbaceous plant and timber, with continuously cooking and the combination of batch cooking pulping process for mixed, on the basis of realizing raising paper product quality, has reduced producting process difficulty.
The technical solution used in the present invention is as follows:
Continuous and the batch cooking mixed pulp paper technology of a kind of vegetation raw material, the mechanical treatment, batching and the continuously cooking that comprise the draft raw material, the mechanical treatment of woody raw material, the rotary spherical digester boiling, it is characterized in that after the washing of the draft raw material of mechanical cutting, dewatering by conveyor delivery to dewatering device, then to steaming plant prepare burden, continuously cooking; By the rotary spherical digester batch cooking, wooden crude pulp and draft crude pulp after the boiling mix at jetting storehouse the woody raw material of mechanical treatment through the batching back, and the vegetation slurries of mixing are proceeded pulping process such as pulp washing, bleaching, and technology is manufactured paper with pulp into paper routinely then.
Woody material cooking operation is made up of two groups of rotary spherical digesters, and two groups of rotary spherical digester intermittent cyclic are to jetting storehouse wooden crude pulp without interruption.When wood pulp addition or additional proportion are big, can increase rotary spherical digester group number.
The mechanical treatment of draft raw material is to carry out hydraulic pulping again after the draft raw material is cut into the grass section of 3～5cm.
Because the physics and the chemical property of draft raw material and woody raw material differ greatly, therefore mechanical pretreatment and the cooking process to the two is divided into two circuits: the draft raw material carries out continuously cooking through adopting boiling machinery behind the mechanical cutting, and woody raw material is after the machinery section, carry out the batch (-type) boiling with rotary spherical digester, after both prepare thick slurry respectively, be transported to jetting storehouse and mix, remove pulping process such as joint, pulp washing and slagging-off then, technology is manufactured paper with pulp into paper routinely at last.
The short texture of wooden crude pulp, and the fiber of herbaceous stem crude pulp is tiny, the two bulk density of mixing the back paper pulp fiber increases, fiber layer structure also helps pulp washing, the thickness of mixed pulp can reach more than the 4cm when pulp washing, has not only effectively reduced the generation of pulp washing black liquor but also has improved output.Content of organics height in the black liquor of wood pulp mixes the content of organics that pulp washing can improve black liquor, reduces the intractability of black liquor.Draft slurry and woody slurry mix at pulping process, and through mixing pulp washing, pumping, and through the agitating device in the slurry tower, the two can fully mix, and does not need to increase special paper pulp mixing device again.The adding of wood pulp can improve every performance indications of finished paper, improves the quality of finished paper.
Beneficial effect of the present invention is, this process synthesis the slurrying of draft continuously cooking and woody raw material pulping by cooking operation intermittently, and with the two in conjunction with being used for papermaking, not only improved the capability and performance index of finished paper, and reduced the quantum of output of pulp washing difficulty and black liquor, saved the processing cost of black liquor in producing.
The specific embodiment
Embodiment 1 usefulness chaffcutter is cut into the grass section of 3～5cm with wheat straw, is transported to the dehydration spiral by waterpower grass chopper, blade pump then after dedusting, enters the boiling spiral then and carries out continuously cooking, and the straw pulp after the boiling is delivered to jetting storehouse by device for discharging.Slicer is cut into wood chip with pulp wood, delivers to rotary spherical digester and carry out batch cooking after dedusting, and jetting storehouse sent into by the wood pulp after the boiling and straw pulp mixes, and the rotary spherical digester that batch cooking is used is two groups, and the two circulates at interval to jetting storehouse slurry without interruption.The continuously cooking operation is supplied 120 tons of straw pulps to jetting storehouse every day, and every day supplied 30 tons of wood pulps to jetting storehouse by two groups of rotary spherical digesters.After slurry in the jetting storehouse was delivered to pulping process such as removing joint and pulp washing and made with extra care by coarse slurry pump, paper technology was manufactured paper with pulp and can be made finished paper routinely.
Claims (3)
1, the continuous and batch cooking mixed pulp paper technology of a kind of vegetation raw material, the mechanical treatment, batching and the continuously cooking that comprise the draft raw material, the mechanical treatment of woody raw material, the rotary spherical digester boiling, it is characterized in that after the washing of the draft raw material of mechanical cutting, dewatering by conveyor delivery to dewatering device, then to steaming plant prepare burden, continuously cooking; By the rotary spherical digester batch cooking, wooden crude pulp and draft crude pulp after the boiling mix at jetting storehouse the woody raw material of mechanical treatment through the batching back, and the vegetation slurries of mixing are proceeded pulping process such as pulp washing, bleaching, and technology is manufactured paper with pulp into paper routinely then.
2, vegetation raw material according to claim 1 continuously and batch cooking mixed pulp paper technology is characterized in that woody material cooking operation is made up of two groups of rotary spherical digesters, and two groups of rotary spherical digester intermittent cyclic are to jetting storehouse wooden crude pulp without interruption.
3, vegetation raw material according to claim 1 continuously and batch cooking mixed pulp paper technology, the mechanical treatment that it is characterized in that the draft raw material is to carry out hydraulic pulping again after the draft raw material is cut into the grass section of 3～5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101055662A CN1546788A (en) | 2003-12-01 | 2003-12-01 | Pulp and paper making process of vert material continuous and intermittent steaming and cooking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101055662A CN1546788A (en) | 2003-12-01 | 2003-12-01 | Pulp and paper making process of vert material continuous and intermittent steaming and cooking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1546788A true CN1546788A (en) | 2004-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101055662A Pending CN1546788A (en) | 2003-12-01 | 2003-12-01 | Pulp and paper making process of vert material continuous and intermittent steaming and cooking |
Country Status (1)
| Country | Link |
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| CN (1) | CN1546788A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245830A (en) * | 2008-10-14 | 2011-11-16 | A·L·梅什泰基 | Method for producing a fibrous semifinished product from cellulose-containing materials and line for implementing same |
-
2003
- 2003-12-01 CN CNA2003101055662A patent/CN1546788A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245830A (en) * | 2008-10-14 | 2011-11-16 | A·L·梅什泰基 | Method for producing a fibrous semifinished product from cellulose-containing materials and line for implementing same |
| CN102245830B (en) * | 2008-10-14 | 2014-02-12 | A·L·梅什泰基 | Method for producing fibrous semifinished product from cellulose-containing materials and line for implementing same |
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