CN102517971B - A kind of preparation method of wheat straw reed mixing slurry - Google Patents
A kind of preparation method of wheat straw reed mixing slurry Download PDFInfo
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- CN102517971B CN102517971B CN201110426739.5A CN201110426739A CN102517971B CN 102517971 B CN102517971 B CN 102517971B CN 201110426739 A CN201110426739 A CN 201110426739A CN 102517971 B CN102517971 B CN 102517971B
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Abstract
The present invention relates to the preparation method of a kind of wheat straw reed mixing slurry, the method is with wheat straw and the reed ratio according to 7:3 ~ 4:6, adopts the slurrying of soda pulping method.The continuous seepage problem that the slurry that wheat straw reed pulping process of the present invention solves continuous digesting apparatus is under-supply, expand the market share of raw materials market resource, compensate for the wretched insufficiency of wheat straw resource, mixing slurry weight in wet base of the present invention increases simultaneously, reach 2.6 ~ 3.0, be easy to filter, in black liquid extraction process, there is advantage.
Description
Technical field
The invention belongs to pulping and papermaking method applied technical field, particularly relate to the preparation method of a kind of wheat straw reed mixing slurry.
Background technology
All the time, the slurrying for wheat straw or reed is all adopt single Straw Pulp alkaline process cooking method or single reed pulp alkaline process cooking method usually, and this method is applied in continuous digesting apparatus exists following technological deficiency:
1., when raw material occurs nervous, the normal production of enterprise can be had a strong impact on;
2. single Wheat Straw Alkaline boiling method, the slurry weight in wet base drawn is on the low side, is only about 2.0;
3. single Wheat Straw Alkaline boiling method, the slurry drainage drawn difficulty, affects the extraction probability of black liquor.
Summary of the invention
The object of the invention is to the defect overcoming above-mentioned prior art, provide one to improve grout structure, improve the preparation method of the wheat straw reed mixing slurry of single Straw Pulp water filtering performance and slurry weight in wet base.
For achieving the above object, the present invention adopts following technical proposals:
A preparation method for wheat straw reed mixing slurry, to it is characterized in that with wheat straw and reed, according to the ratio of 7: 3 ~ 4: 6, adopting the slurrying of soda pulping method;
Above-mentioned wheat straw and reed adopt dry and wet stock preparation, gained blade and reed leaf length 40 ~ 60mm, moisture content≤15%, qualification rate >=85%;
Above-mentioned soda pulping method parameter is:
Alkali charge: 19-20%, in NaOH,
Liquor ratio: 1: 2.8,
Cooking pressure: 0.55 ~ 0.60MPa,
Boiling temperature: 158 DEG C ~ 163 DEG C, idle period 25-30 minute, heating-up time 90-95 minute, temperature retention time 25-30 minute, blowdown time 25-30 minute,
Cooking liquor temperature: 80 ~ 85 DEG C,
Digesting assistant: PPT401 boiling bleeding agent, consumption 0.5%.
PPT401 boiling bleeding agent is a kind of novel digesting assistant that Shanghai Ju Yuan paper technology Co., Ltd produces, and can increase cooking liquor osmotic efficiency and prevent boiling, to put forward high product yield and uniformity.Add this proprietary chemical and can improve alkali lye raw material absorption alkali number (reaching 30%) in the initial 15min of boiling.Alkali lye have an effect after acid hydrolysis namely stop, directly causing alkali concn higher in alkali residue lower in white liquid and raw material.Alkali lye can enter in raw material better, and can reduce over boiling fibre weight and not by boiling material quantity, prevent lignin and other compounds from depositing again, effectively eliminate the byproduct in compound.PPT401 boiling bleeding agent had both been applicable to leaf wood and needlebush, was applicable to again non-wood pulping raw material; Meanwhile, PPT401 boiling bleeding agent is applicable to all boiling methods, comprises sulfate process, alkaline AQ method, green liquor semichemical method, sulphite process and CTMP (CTMP) etc.
The continuous seepage problem that the slurry that wheat straw reed pulping process of the present invention solves continuous digesting apparatus is under-supply, expand the market share of raw materials market resource, compensate for the wretched insufficiency of wheat straw resource, mixing slurry weight in wet base of the present invention increases simultaneously, reach 2.6 ~ 3.0, be easy to filter, in black liquid extraction process, there is advantage.
Detailed description of the invention
The preparation of wheat straw reed mixing slurry of the present invention mainly adopts the ratio of 7: 3 ~ 4: 6 to adopt soda pulping method to obtain, and concrete grammar is:
Outward transport wheat straw, reed adopt dry wet combined techniques to get the raw materials ready: namely wheat straw, reed are switched in method claimed range through rotor chaffcutter respectively, after the dedusting of goat's horn deduster, removal of impurities, allocate into according to the ratio of 7: 3 ~ 4: 6, deliver to size degradation, washing that waterpower grass chopper carries out raw material, careless reed mixing tab after washing is pumped into inclined helix dehydrator by blade and carries out processed, blade after process enters pin drum meter, and unnecessary grass, reed mixing tab send waterpower grass chopper back to by feed back spiral.Wheat straw and reed gained blade and reed leaf length 40 ~ 60mm after said process, moisture content≤15%, qualification rate >=85%.
Blade after metering first through steam preheating process carry out wheat straw, reed softening after, inputted in continuous steamer by scroll feeder and carry out boiling, add cooking liquor in boiling vessel and pass into steam and carry out boiling.Steam the slurry after solution and deliver to four sections of drift extraction workshop sections by spraying pot.Black wash after boil house boiling delivers to four sections of drift workshops, black liquid extraction is carried out through extracting workshop section, slurry after extracting black liquor is delivered to bolting house, after vanning, screen centrifuge screening, one-level three sections of purified treatment are carried out by scummer, slurry after purification delivers to bleachery through chlorination, alkali treatment, post-bleach, after washing, delivers to copy paper system and carries out copy paper.
Above-mentioned soda processes method parameter is:
Alkali charge: 19-20%, in NaOH,
Liquor ratio: 1: 2.8,
Cooking liquor temperature: 80 ~ 85 DEG C,
Cooking pressure: 0.55 ~ 0.60MPa,
Boiling temperature: 158 DEG C ~ 163 DEG C,
Boiling curve (unit: minute):
Digesting assistant: the PPT401 boiling bleeding agent that Shanghai Ju Yuan paper technology Co., Ltd produces, consumption 0.5%.
Above-mentioned bleaching adopts CEH tri-stage bleaching method, and its bleached pulp whiteness can reach more than 75%.
Claims (2)
1. a preparation method for wheat straw reed mixing slurry, it is characterized in that, with wheat straw and the reed ratio according to 7:3 ~ 4:6, adopt the slurrying of soda pulping method, described soda pulping method parameter is:
Alkali charge: 19-20%, in NaOH,
Liquor ratio: 1:2.8,
Cooking pressure: 0.55 ~ 0.60MPa,
Boiling temperature: 158 DEG C ~ 163 DEG C, idle period 25-30 minute, heating-up time 90-95 minute, temperature retention time 25-30 minute, blowdown time 25-30 minute,
Cooking liquor temperature: 80 ~ 85 DEG C,
Digesting assistant: PPT401 boiling bleeding agent, consumption 0.5%.
2., according to the preparation method of wheat straw reed mixing slurry according to claim 1, it is characterized in that above-mentioned wheat straw and reed adopt dry and wet stock preparation, gained blade and reed leaf length 40 ~ 60mm, moisture content≤15%, qualification rate >=85%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110426739.5A CN102517971B (en) | 2011-12-19 | 2011-12-19 | A kind of preparation method of wheat straw reed mixing slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110426739.5A CN102517971B (en) | 2011-12-19 | 2011-12-19 | A kind of preparation method of wheat straw reed mixing slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102517971A CN102517971A (en) | 2012-06-27 |
| CN102517971B true CN102517971B (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110426739.5A Expired - Fee Related CN102517971B (en) | 2011-12-19 | 2011-12-19 | A kind of preparation method of wheat straw reed mixing slurry |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103842A (en) * | 2012-12-14 | 2013-05-15 | 中冶美利纸业股份有限公司 | Pulping method for waste Renminbi |
| CN103046426A (en) * | 2013-01-14 | 2013-04-17 | 岳阳林纸股份有限公司 | Pulping method of semi-chemical pulp made from reed |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191707A (en) * | 2010-12-30 | 2011-09-21 | 中冶美利纸业股份有限公司 | Low temperature rapid pulping process of reed |
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2011
- 2011-12-19 CN CN201110426739.5A patent/CN102517971B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191707A (en) * | 2010-12-30 | 2011-09-21 | 中冶美利纸业股份有限公司 | Low temperature rapid pulping process of reed |
Non-Patent Citations (1)
| Title |
|---|
| 芦竹、芦苇烧碱法混合制浆;马厚悦 等;《中国造纸》;20030228;第22卷(第2期);13-15 * |
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| CN102517971A (en) | 2012-06-27 |
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