CN101368346A - Method for full mulberry twigs pulping - Google Patents
Method for full mulberry twigs pulping Download PDFInfo
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- CN101368346A CN101368346A CNA2008100738161A CN200810073816A CN101368346A CN 101368346 A CN101368346 A CN 101368346A CN A2008100738161 A CNA2008100738161 A CN A2008100738161A CN 200810073816 A CN200810073816 A CN 200810073816A CN 101368346 A CN101368346 A CN 101368346A
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- ramulus mori
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Abstract
The invention discloses a method for pulping mulberry stalk, including the following steps: treatment to the material: chopping the mulberry stalk into segments at length less than 50mm or slantingly chopping the mulberry stalk into slices at thickness less than10mm; ripping the mulberry stalk segments or slices into filaments and removing the bones and dust; compressing and storing the pulping material under humidified condition; braising, then filtrating, washing and blanching the braised pulping material; or braising the filtrated mulberry stalk filaments; filtrating the braised pulping material; washing and blanching the pulping material. The method has the advantages that the mulberry stalk processed through the method is free from birthing insects and avoided from decaying, thus fundamentally solving the problem in storing the mulberry stalk. Meanwhile, from material preparation, the method reduces the difference between the head and tail of mulberry stalk as much as possible and makes the head and the tail of the mulberry stalk shorten individual difference as much as possible, thus making braising evener.
Description
Technical field
The present invention relates to the pulp and paper technology field, specifically is to be the technology of raw material processing in the raw pulp process with full ramulus mori.
Background technology
The full mulberry twigs pulping technical matters that report is arranged at present all be with Kun formula bamboo cutter the ramulus mori shape of cutting into chunks, or ramulus mori is cut into slices with disc slicer, use kraft cooking then.Storage procedures is to adopt whole piece ramulus mori dry method to store.Because ramulus mori bast and xylem chemical composition have than big-difference, skin zone's pectin is many and lignin is few, and the xylem lignin is many, and their fibre morphology is also very inequality, and sheath fibers is long, and the xylem fiber is lacked.The root of branch and the diameter of taper differ greatly, so when generally only ramulus mori being cut into chunks shape or sheet with common cutting method, the anti-xylem elder generation imbibition that you Duo than lignin content of the skin zone that lignin content is few, root is older and diameter is big than taper, so more difficult imbibition so bast long fiber and taper fiber are subjected to severely degrade when boiling, causes pulp yield on the low side, paper intensity decreases etc., this has just increased a difficult problem to mulberry twigs pulping.
Ramulus mori when using dry method to store, is easy to snake because contain more rich nutrition, also because too tender, so rot easily, so ramulus mori when extensive purchase, storage is an individual hang-up, this has just restricted the large-scale production utilization of ramulus mori.
Summary of the invention
The present invention provides the pulping process of a cover with full ramulus mori in order to overcome the deficiencies in the prior art, comprising: the processing of purchase raw material ramulus mori: cut-out, dedusting, storage; Boiling; Screening; Pulp washing; Operations such as bleaching.
For solving the problems of the technologies described above, technical scheme of the present invention is:
The method of full mulberry twigs pulping: comprise the processing of raw material, ramulus mori is cut into 50mm with the hypomere shape or cut sth. askew into the following sheet of thick 10mm; Boiling; Slurry after the boiling is through screening; Pulp washing and bleaching.It is thread that the processing method of raw material is that the ramulus mori with section shape or sheet is torn into, and removes marrow dirt, and the raw material of doing slurrying is stored in compacting under the condition of humidification;
The concrete steps of slurrying are as follows:
1. when purchasing the ramulus mori raw material, do not purchase perennial root next year, requirement reaches mulberry leaf and trims with interior ramulus mori from tip one chi;
2. ramulus mori is cut into 50mm with the hypomere shape, or the following sheet of thick 10mm of cutting sth. askew;
3. handle section shape or sheet ramulus mori wherein accompany the following ramulus mori section shape particle of diameter 5mm with the thread ramulus mori that shredder is torn into;
4. remove marrow dirt, the sieve that the thread ramulus mori sieve diameter with 3. is 2mm sieves, and the marrow dirt of crossing sieve aperture is removed;
5. raw material is stored, and the thread ramulus mori after sieving 4. is made pulping raw material containing under the condition of moisture 60%～80% or more the compacting storage; Or directly the 4. thread ramulus moris that sieve, remove behind the marrow dirt are made pulping raw material;
6, boiling, the thread ramulus mori with 5. be at the proportioning 0.03%--0.1% of the green oxygen of auxiliary agent or anthraquinone class and derivative thereof (digesting assistant), and sulphidity 15%--25%, alkali be than 18%--25%, the sulfate pulping of liquor ratio 1:2.5--3.5, and boiling curve is:
| Program | Heating and heat preservation is spurted blowing |
| Cooking pressure | 0MP—————0.7MP—————0.7MP—————0MP |
| Time | 80 minutes 180 minutes |
7, the slurry after the last boiling is through screening, pulp washing, bleaching.
The present invention's benefit compared with the prior art is:
1. we are thread by just ramulus mori being torn into when purchasing.Use wet method to store after removing marrow dirt, not only avoided the infested of ramulus mori, also solved the problem that ramulus mori rots, fundamentally solved the storage problem of ramulus mori.
2. the root of ramulus mori is older than afterbody, and the present invention reduces the individual difference of ramulus mori root and afterbody as much as possible from getting the raw materials ready, and makes it shorten imbibition difference as far as possible, thereby makes boiling more even.
The specific embodiment
The processing method of full mulberry twigs pulping raw material: step is as follows:
1. when purchasing the ramulus mori raw material, do not purchase perennial root next year, requirement reaches mulberry leaf and trims with interior ramulus mori from tip one chi.
2. ramulus mori is cut into 50mm with the hypomere shape, or the following sheet of thick 10mm of cutting sth. askew.
3. handle section shape or sheet ramulus mori wherein accompany the following ramulus mori particle of a small amount of diameter 5mm with the thread ramulus mori that shredder is torn into;
4. remove marrow dirt, the velvet shape ramulus mori sieve diameter with 3. is that the sieve of 2mm sieves, and the marrow dirt of crossing sieve aperture is removed;
5. raw material is stored, and the compacting under the condition that contains moisture 60%～80% of the thread ramulus mori after sieving 4. is stored, or a thread ramulus mori of the doing boiling of directly taking away.
6, boiling, the thread ramulus mori with 5. be in the proportioning 0.03%～0.1% of the green oxygen of digesting assistant or anthraquinone class and derivative thereof, and sulphidity 15%～5%, alkali be than 18%～25%, the sulfate pulping of liquor ratio 1:2.5～3.5, and boiling curve is:
| Program | Heating and heat preservation is spurted blowing |
| Cooking pressure | 0MP—————0.7MP—————0.7MP—————0MP |
| Time | 80 minutes 180 minutes |
7, the slurry after the last boiling is through screening, pulp washing, bleaching.
Below in conjunction with embodiment the present invention is given a detailed account.
Embodiment 1
Carry out the processing operation of raw material by the step of the processing method of above-mentioned full mulberry twigs pulping raw material, ramulus mori is cut into 50mm with the hypomere shape, or the thick 10mm sheet of cutting sth. askew, and be torn into thread ramulus mori, wherein accompany the following ramulus mori particle of diameter 5mm with shredder; Thread ramulus mori is crossed the sieve of sieve diameter 2mm, sieves the dirt of emedullating; On thread ramulus mori, spray water, its compacting under the condition that contains moisture 60% is stored; Press full mulberry twigs pulping technology as raw material, the slurry of boiling, last boiling is through screening, pulp washing, bleaching.
The process conditions and the experimental result of present embodiment are as shown in table 1.There is the velvet-like ramulus mori of prior art and shredded dried bean curd to make the experimental result of raw pulp in the table.
Table 1:
| Process conditions | Section shape ramulus mori (prior art) | Sheet ramulus mori (prior art) | Shredded dried bean curd shape ramulus mori (diameter 5mm is following) | Wet method is stored thread ramulus mori (diameter 5mm is following) (storing for 60% time at moisture) |
| Alkali is than % (NaOH) | 20 | 20 | 20 | 20 |
| Sulphidity % | 16.7 | 16.7 | 16.7 | 16.7 |
| Auxiliary agent proportioning % | 0.05 | 0.05 | 0.05 | 0.05 |
| Liquor ratio | 1：3 | 1：3 | 1：3 | 1：3 |
| Residual alkali g/l | 9.6 | 9.4 | 9.6 | 12.8 |
| Permanganate number | 20.8 | 19.9 | 16.0 | 10.3 |
| Unscreened yield % | 57.8 | 54.2 | 46.8 | 46.9 |
| Screened yield % | 27.1 | 30.2 | 46.72 | 46.81 |
| Thick slag rate % | 53.2 | 44.3 | 0.17 | 0.19 |
| Bleachability % | 8 | 8 | 8 | 8 |
| Whiteness % | 63.5 | 66.1 | 71.1 | 72.4 |
| Outward appearance | Steam that to separate raw material many | Steam that to separate raw material many | Starch very even, no raw material | Starch very even, no raw material |
The ramulus mori that is cut into thread ramulus mori and the section of one-tenth shape (or sheet) as can be seen from Table 1 is with boiling under the condition, because thread ramulus mori individual difference is less, and absorb soup easily, imbibition is more even, so thread ramulus mori is than the easy boiling of ramulus mori of section shape (or sheet), screened yield is also high a lot, reaches 46.8%, and the section shape have only 27.1%, sheet also just have 30.2%.Thread thick slag rate is much lower than section shape and sheet also, has only 0.2%, and the section shape reach 53.2%, 44.3% of sheet.And become ramulus mori steaming section and sheet back to also have a lot of very hard root knaurs to exist, and if digestion time is prolonged, will certainly make sheath fibers and afterbody fiber degradation, cause the decline of paper strength, and make the yield reduction of slurry.The slurry permanganate number of the section of making shape and sheet ramulus mori reaches about 10, and the alkali ratio will reach more than 24% (NaOH), and it is high 4 percentage points to store thread ramulus mori alkaline consumption than wet method.
Embodiment 2
Carry out the processing operation of raw material by the step of the processing method of above-mentioned full mulberry twigs pulping paper making raw material, ramulus mori is cut into 50mm with the hypomere shape, or the sheet of cutting sth. askew below the thick 10mm, with the thread ramulus mori that shredder is torn into, wherein accompany the following ramulus mori section shape particle of diameter 5mm; Thread ramulus mori is crossed the sieve of sieve diameter 2mm, sieves the dirt of emedullating; On thread ramulus mori, spray water, make compacting storage under its condition that contains moisture 80%; Press the full mulberry twigs pulping paper technology as raw material, the slurry after boiling, the last boiling is through screening, pulp washing, bleaching.The process conditions and the experimental result of present embodiment are as shown in table 2.
Table 2:
| Process conditions | Wet method is stored thread ramulus mori (diameter 5mm is following) (storing for 70% time at moisture) |
| Alkali is than % (NaOH) | 20 |
| Sulphidity % | 16.7 |
| Auxiliary agent proportioning % | 0.05 |
| Liquor ratio | 1∶3 |
| Residual alkali g/l | 12.1 |
| Permanganate number | 10.5 |
| Unscreened yield % | 46.2 |
| Screened yield % | 46.0 |
| Thick slag rate % | 0.4 |
| Bleachability % | 8 |
| Whiteness % | 72.1 |
| Outward appearance | Starch very even, no raw material |
Thread ramulus mori, wherein accompany the following ramulus mori section shape particle of diameter 5mm, store boiling under the same condition at moisture for 70% time, residual alkali reaches 12.1g/l, permanganate number is 10.5, unscreened yield 46.2%, screened yield 46.0, thick slag rate is 0.4%, whiteness is 72.1%, and the very even no raw material of slurry, and every index is all good than section shape ramulus mori.
Embodiment 3
Carry out the processing operation of raw material by the step of the processing method of above-mentioned full mulberry twigs pulping raw material, ramulus mori is cut into 50mm with the hypomere shape, or below the thick 10mm,, wherein accompany the following ramulus mori section shape particle of a small amount of diameter 3mm with the thread ramulus mori that shredder is torn into; Thread ramulus mori is crossed the sieve of sieve diameter 2mm, sieves the dirt of emedullating; At thread ramulus mori water spray, make compacting storage under its condition that contains moisture 60%; Press the full mulberry twigs pulping paper technology as raw material, the slurry after boiling, the last boiling is through screening, pulp washing, bleaching.The process conditions and the experimental result of present embodiment are as shown in table 3.
Table 3:
| Process conditions | Shredded dried bean curd shape ramulus mori (diameter 3mm is following) | Wet method is stored thread ramulus mori (diameter 3mm is following) (storing for 60% time at moisture) |
| Alkali is than % (NaOH) | 20 | 20 |
| Sulphidity % | 16.7 | 16.7 |
| Auxiliary agent proportioning % | 0.05 | 0.05 |
| Liquor ratio | 1：3 | 1：3 |
| Residual alkali g/l | 9.4 | 12.3 |
| Permanganate number | 15.1 | 10.1 |
| Unscreened yield % | 46.4 | 46.5 |
| Screened yield % | 46.3 | 46.4 |
| Thick slag rate % | 0.2 | 0.2 |
| Bleachability % | 8 | 8 |
| Whiteness % | 71.5 | 72.8 |
| Outward appearance | Starch very even, no raw material | Starch very even, no raw material |
Thread ramulus mori, wherein accompany the following ramulus mori section shape particle of diameter 3mm, store boiling under the same condition at moisture for 60% time, residual alkali reaches 12.3g/l, permanganate number is 10.1, unscreened yield 46.5%, screened yield 46.4, thick slag rate is 0.2%, whiteness is 72.8%, and the very even no raw material of slurry, and every index is all good than section shape or sheet ramulus mori.
Embodiment 4
Carry out the processing operation of raw material by the step of the processing method of above-mentioned full mulberry twigs pulping paper making raw material, ramulus mori is cut into 50mm with the hypomere shape, or the sheet of cutting sth. askew below the thick 10mm, with the thread ramulus mori that shredder is torn into, wherein accompany the following ramulus mori section shape particle of a small amount of diameter 3mm; Velvet shape ramulus mori is crossed the sieve of sieve diameter 2mm, sieves the dirt of emedullating; On velvet shape ramulus mori, spray water, make compacting storage under its condition that contains moisture 70%; Press the full mulberry twigs pulping paper technology as raw material, the slurry after boiling, the last boiling is through screening, pulp washing, bleaching.The process conditions and the experimental result of present embodiment are as shown in table 4.
Table 4:
| Process conditions | Wet method is stored velvet shape ramulus mori (diameter 3mm is following) (storing for 70% time at moisture) |
| Alkali is than % (NaOH) | 20 |
| Sulphidity % | 16.7 |
| Auxiliary agent proportioning % | 0.05 |
| Liquor ratio | 1：3 |
| Residual alkali g/l | 12.5 |
| Permanganate number | 10.0 |
| Screened yield % | 46.0 |
| Thick slag rate % | 0.6 |
| Bleachability % | 8 |
| Unscreened yield % | 46.3 |
| Whiteness % | 72.5 |
| Outward appearance | Starch very even, no raw material |
Thread ramulus mori wherein accompanies the following ramulus mori section shape particle of a small amount of diameter 3mm, stores for 70% time at moisture, and at screened yield 46.0, thick slag rate is 0.6%, and whiteness is 72.5%, and the very even no raw material of slurry, and every index is all good than section shape or sheet ramulus mori.
Claims (1)
1. the method for full mulberry twigs pulping, comprise the processing of raw material, ramulus mori is cut into 50mm with the hypomere shape or cut sth. askew into the following sheet of thick 10mm, boiling, the slurry after the boiling is through screening, pulp washing and bleaching, it is characterized in that the processing method of raw material is torn into the ramulus mori of section shape or sheet thread, dedusting, the raw material of doing slurrying is stored in compacting under the condition of humidification;
The concrete operations step of full mulberry twigs pulping method is as follows:
1). during purchase ramulus mori raw material, do not purchase perennial root next year, require to trim with interior ramulus mori mulberry leaf and from one chi on tip;
2). ramulus mori is cut into 50mm with the hypomere shape, or the following sheet of thick 10mm of cutting sth. askew;
3). section shape or sheet ramulus mori are torn into thread ramulus mori with shredder, wherein accompany the following ramulus mori section shape particle of diameter 5mm;
4). remove marrow dirt, the sieve that the thread ramulus mori sieve diameter with 3. is 2mm sieves, and the marrow dirt of crossing sieve aperture is removed;
5). with 4) the thread ramulus mori boiling in back of sieving; Slurry after the boiling is through screening; Pulp washing and bleaching; Or with 4) velvet shape ramulus mori compacting under the condition that contains moisture 60%～80% after sieving stores and makes pulping raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100738161A CN101368346A (en) | 2008-09-28 | 2008-09-28 | Method for full mulberry twigs pulping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100738161A CN101368346A (en) | 2008-09-28 | 2008-09-28 | Method for full mulberry twigs pulping |
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| CN101368346A true CN101368346A (en) | 2009-02-18 |
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| CNA2008100738161A Pending CN101368346A (en) | 2008-09-28 | 2008-09-28 | Method for full mulberry twigs pulping |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154887A (en) * | 2011-02-22 | 2011-08-17 | 杨和荣 | Method for producing high-whiteness bleached ramulus mori pulp by caustic soda-anthraquinone continuous stewing technology |
| CN106223087A (en) * | 2016-09-14 | 2016-12-14 | 黑龙江秀泉科技有限公司 | A kind of dry method pulping process and equipment |
-
2008
- 2008-09-28 CN CNA2008100738161A patent/CN101368346A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154887A (en) * | 2011-02-22 | 2011-08-17 | 杨和荣 | Method for producing high-whiteness bleached ramulus mori pulp by caustic soda-anthraquinone continuous stewing technology |
| CN106223087A (en) * | 2016-09-14 | 2016-12-14 | 黑龙江秀泉科技有限公司 | A kind of dry method pulping process and equipment |
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Open date: 20090218 |