CN102154891A - Process for screening and cleaning bamboo wood dissolving slurry - Google Patents
Process for screening and cleaning bamboo wood dissolving slurry Download PDFInfo
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Abstract
The invention belongs to the technical field of dissolving slurry, in particular to a process for screening and cleaning bamboo wood dissolving slurry. The process for screening and cleaning bamboo wood dissolving slurry comprises a rough screening process A and a fine screening process B, wherein the rough screening process A is characterized by adopting a one-section desander, a one-section knotter, a one-section slurry washer and one-section knot washer; the fine screening process B is characterized by adopting a three-section pressurized screen, a two-section desander, the one-section slurry washer and a one-section vibrating screen. In the process disclosed by the invention, a washing working procedure is added in the screening working procedure to lower the density of slurry in the screening process, prevent the influence on the screening effect because particles in the slurry adhere to equipment in the screening working procedure and improve working efficiency on screening. In the process, one slurry washer is added in the rough screening process for washing to prevent corrosive materials contained in slurry from corroding equipment in the fine screening process and prolong the service life of the equipment used in the fine screening process.
Description
Technical field
The invention belongs to the preparing technical field of dissolving pulp, be specifically related to a kind of technology of sieving and washing of bamboo wood dissolving pulp.
Background technology
The dissolving pulp cellulose derivative industries such as viscose, nitrocellulose, acetate fiber that are widely used in weaving, market demand is progressively enlarging.Bamboo wood dissolving pulp market prospects at present newly developed are wide, can fill up the breach of China's dissolving pulp.
Existing bamboo wood dissolving pulp production equipment is relative with technology backward, particularly screen and washing process, they are two independently systems, be to wash again after screening technology is all finished, particle in the slurry is easily attached on the equipment of screening process and the effect of influence screening like this, and the corrosive substance that contains in the slurry corrodes the screening process device therefor easily, greatly reduces the service life of screening process device therefor.
Owing to infiltrate impurity such as more silt, rubble, iron filings easily in the processes such as bamboo wood felling, transhipment.Still wood chip is higher relatively through procedure for preparation rear impurity content, and the effect that traditional slurry screening mode removes sand is limited, causes in the follow-up workshop section heavy seeds content height such as the grains of sand, and equipment attrition is serious.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, and a kind of technology of sieving and washing of the bamboo wood dissolving pulp that improves screening effect and prolong screening process device therefor service life is provided.
The object of the present invention is achieved like this:
A kind of bamboo wood dissolving pulp sieve and wash technology, it comprises scalping technology A and fine screen technology B;
Described scalping technology A adopts one section desander, one section knotter, one section wash engine and one section to wash the joint machine, and concrete steps are:
A1, with the slurry in the boiling spraying pot through being pumped to knotter;
A2, in knotter, it is standby that the good slurry of the scalping by sieve aperture enters wash engine washing back, and the slag slurry by sieve aperture does not enter the joint machine of washing;
A3, in washing the joint machine, knot in the slag slurry drains between the waste residue recovery from washing after joint machine top spiral dries, not only can be used as dilution and the good slurry that the slag slurry obtains after separating by the washing of washing the joint machine is very low owing to concentration so can be back to knotter repeating step A2, simultaneously recyclable fiber wherein by desander;
Described fine screen technology B adopts three sections pressurized screens, two sections desanders, one section wash engine and one section vibrating screen, and concrete steps are:
The good stock pump of scalping through the wash engine washing that B1, process scalping technology A obtain is delivered to one section pressurized screen
B2, in one section pressurized screen, it is standby to enter wash engine washing back by the good slurry of the fine screen of sieve seam, the slag slurry by the sieve seam does not enter two sections pressurized screens behind desander;
B3, in two sections pressurized screens, by repeating step B2 in backflow of slurry to the section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter three sections pressurized screens behind desander;
B4, in three sections pressurized screens, by repeating step B3 in backflow of slurry to the two section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter vibrating screen;
B5, in vibrating screen, isolated good slurry is back to three sections pressurized screen repeating step B4, the slag that sifts out slurry drains between waste residue reclaims.
Wherein, the technological parameter of described scalping technology A is:
(1) advances to starch concentration: 3%-5%
(2) deslagging ratio: 10%-15%
(3) knotter advances to starch pressure: 250Kpa-350Kpa
(4) knotter operation pressure reduction: 20Kpa-80Kpa
(5) desander advances to starch pressure: 275Kpa-350Kpa.
Wherein, the sieve aperture of knotter is 9.5mm among the described scalping technology A, and the sieve aperture of washing the joint machine is 9.5mm.
Wherein, the technological parameter of described fine screen technology B is:
(1) advances to starch concentration: 0.7%-3.5%
(2) one sections pressurized screens
Advance to starch pressure: 250Kpa-350Kpa
Advance to starch concentration: 3.2%
Deslagging ratio: 10%-15%
(3) two sections pressurized screens
Advance to starch pressure: 250Kpa-350Kpa
Advance to starch concentration: 1.2%
Deslagging ratio: 8%-15%
Desander advances to starch pressure: 275Kpa-350Kpa
(4) three sections pressurized screens
Advance to starch pressure: 250Kpa-350Kpa
Advance to starch concentration: 0.8%
Deslagging ratio: 8%-13%
Desander advances to starch pressure: 275Kpa-350Kpa.
Wherein, among the described fine screen technology B sieve of pressurized screen seam wide be 0.2mm, the sieve aperture of vibrating screen is 4.0mm.
Beneficial effect of the present invention is:
(1), the present invention interted washing procedure in screening process, can reduce the concentration of slurry in the screening process, prevents that particle in the slurry from attached to the effect of influence screening on the equipment of screening process, having improved the operating efficiency of screening.
(2), in scalping technology, increased a wash engine and washed, also can prevent the corrosion of the corrosive goods confrontation fine screen technology device therefor that contains in the slurry, prolonged the service life of fine screen technology device therefor.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
The invention will be further described below by embodiment, but practical range of the present invention is not limited to this.
Embodiment 1.
A kind of bamboo wood dissolving pulp sieve and wash technology, it comprises scalping technology A and fine screen technology B;
Described scalping technology A adopts one section desander, one section knotter, one section wash engine and one section to wash the joint machine, and concrete steps are:
A1, with the slurry in the boiling spraying pot through being pumped to knotter;
A2, in knotter, it is standby that the good slurry of the scalping by sieve aperture enters wash engine washing back, and the slag slurry by sieve aperture does not enter the joint machine of washing;
A3, in washing the joint machine, the knot in the slag slurry drains into after joint machine top spiral dries between waste residue reclaims from washing, and the good slurry that the slag slurry obtains after separating by the washing of washing the joint machine is back to knotter by desander, repeating step A2;
Described fine screen technology B adopts three sections pressurized screens, two sections desanders, one section wash engine and one section vibrating screen, and concrete steps are:
The good stock pump of scalping through the wash engine washing that B1, process scalping technology A obtain is delivered to one section pressurized screen
B2, in one section pressurized screen, it is standby to enter wash engine washing back by the good slurry of the fine screen of sieve seam, the slag slurry by the sieve seam does not enter two sections pressurized screens behind desander;
B3, in two sections pressurized screens, by repeating step B2 in backflow of slurry to the section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter three sections pressurized screens behind desander;
B4, in three sections pressurized screens, by repeating step B3 in backflow of slurry to the two section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter vibrating screen;
B5, in vibrating screen, isolated good slurry is back to three sections pressurized screen repeating step B4, the slag that sifts out slurry drains between waste residue reclaims.
Wherein, the technological parameter of described scalping technology A is:
(1) advances to starch concentration: 3%
(2) deslagging ratio: 10%
(3) knotter advances to starch pressure: 250Kpa
(4) knotter operation pressure reduction: 20Kpa
(5) desander advances to starch pressure: 275Kpa
(6) sieve aperture of knotter is 9.5mm
(7) sieve aperture of washing the joint machine is 9.5mm.
Wherein, the technological parameter of described fine screen technology B is:
(1) advances to starch concentration: 0.7%
(2) one sections pressurized screens
Advance to starch pressure: 250Kpa
Advance to starch concentration: 3.2%
Deslagging ratio: 10%
(3) two sections pressurized screens
Advance to starch pressure: 250Kpa
Advance to starch concentration: 1.2%
Deslagging ratio: 8%-15%
Desander advances to starch pressure: 275Kpa
(4) three sections pressurized screens
Advance to starch pressure: 250Kpa
Advance to starch concentration: 0.8%
Deslagging ratio: 8%-13%
Desander advances to starch pressure: 275Kpa.
The sieve seam of pressurized screen is wide: 0.2mm
The sieve aperture of vibrating screen: 4.0mm.
Embodiment 2.
A kind of bamboo wood dissolving pulp sieve and wash technology, it comprises scalping technology A and fine screen technology B;
Described scalping technology A adopts one section desander, one section knotter, one section wash engine and one section to wash the joint machine, and concrete steps are:
A1, with the slurry in the boiling spraying pot through being pumped to knotter;
A2, in knotter, it is standby that the good slurry of the scalping by sieve aperture enters wash engine washing back, and the slag slurry by sieve aperture does not enter the joint machine of washing;
A3, in washing the joint machine, the knot in the slag slurry drains into after joint machine top spiral dries between waste residue reclaims from washing, and the good slurry that the slag slurry obtains after separating by the washing of washing the joint machine is back to knotter by desander, repeating step A2;
Described fine screen technology B adopts three sections pressurized screens, two sections desanders, one section wash engine and one section vibrating screen, and concrete steps are:
The good stock pump of scalping through the wash engine washing that B1, process scalping technology A obtain is delivered to one section pressurized screen;
B2, in one section pressurized screen, it is standby to enter wash engine washing back by the good slurry of the fine screen of sieve seam, the slag slurry by the sieve seam does not enter two sections pressurized screens behind desander;
B3, in two sections pressurized screens, by repeating step B2 in backflow of slurry to the section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter three sections pressurized screens behind desander;
B4, in three sections pressurized screens, by repeating step B3 in backflow of slurry to the two section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter vibrating screen;
B5, in vibrating screen, isolated good slurry is back to three sections pressurized screen repeating step B4, the slag that sifts out slurry drains between waste residue reclaims.
Wherein, the technological parameter of described scalping technology A is:
(1) advances to starch concentration: 4%
(2) deslagging ratio: 12%
(3) knotter advances to starch pressure: 300Kpa
(4) knotter operation pressure reduction: 30Kpa
(5) desander advances to starch pressure: 290Kpa
(6) sieve aperture of knotter is 9.5mm
(7) sieve aperture of washing the joint machine is 9.5mm.
Wherein, the technological parameter of described fine screen technology B is:
(1) advances to starch concentration: 1.5%
(2) one sections pressurized screens
Advance to starch pressure: 280Kpa
Advance to starch concentration: 3.2%
Deslagging ratio: 12%
(3) two sections pressurized screens
Advance to starch pressure: 300Kpa
Advance to starch concentration: 1.2%
Deslagging ratio: 10%
Desander advances to starch pressure: 300Kpa
(4) three sections pressurized screens
Advance to starch pressure: 280Kpa
Advance to starch concentration: 0.8%
Deslagging ratio: 10%
Desander advances to starch pressure: 300Kpa.
The sieve seam of pressurized screen is wide: 0.2mm
The sieve aperture of vibrating screen: 4.0mm.
Embodiment 3.
A kind of bamboo wood dissolving pulp sieve and wash technology, it comprises scalping technology A and fine screen technology B;
Described scalping technology A adopts one section desander, one section knotter, one section wash engine and one section to wash the joint machine, and concrete steps are:
A1, with the slurry in the boiling spraying pot through being pumped to knotter;
A2, in knotter, it is standby that the good slurry of the scalping by sieve aperture enters wash engine washing back, and the slag slurry by sieve aperture does not enter the joint machine of washing;
A3, in washing the joint machine, the knot in the slag slurry drains into after joint machine top spiral dries between waste residue reclaims from washing, and the good slurry that the slag slurry obtains after separating by the washing of washing the joint machine is back to knotter by desander, repeating step A2;
Described fine screen technology B adopts three sections pressurized screens, two sections desanders, one section wash engine and one section vibrating screen, and concrete steps are:
The good stock pump of scalping through the wash engine washing that B1, process scalping technology A obtain is delivered to one section pressurized screen;
B2, in one section pressurized screen, it is standby to enter wash engine washing back by the good slurry of the fine screen of sieve seam, the slag slurry by the sieve seam does not enter two sections pressurized screens behind desander;
B3, in two sections pressurized screens, by repeating step B2 in backflow of slurry to the section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter three sections pressurized screens behind desander;
B4, in three sections pressurized screens, by repeating step B3 in backflow of slurry to the two section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter vibrating screen;
B5, in vibrating screen, isolated good slurry is back to three sections pressurized screen repeating step B4, the slag that sifts out slurry drains between waste residue reclaims.
Wherein, the technological parameter of described scalping technology A is:
(1) advances to starch concentration: 4%
(2) deslagging ratio: 12%
(3) knotter advances to starch pressure: 320Kpa
(4) knotter operation pressure reduction: 60Kpa
(5) desander advances to starch pressure: 320Kpa
(6) sieve aperture of knotter is 9.5mm
(7) sieve aperture of washing the joint machine is 9.5mm.
Wherein, the technological parameter of described fine screen technology B is:
(1) advances to starch concentration: 2.8%
(2) one sections pressurized screens
Advance to starch pressure: 320Kpa
Advance to starch concentration: 3.2%
Deslagging ratio: 13%
(3) two sections pressurized screens
Advance to starch pressure: 320Kpa
Advance to starch concentration: 1.2%
Deslagging ratio: 8%-15%
Desander advances to starch pressure: 320Kpa
(4) three sections pressurized screens
Advance to starch pressure: 320Kpa
Advance to starch concentration: 0.8%
Deslagging ratio: 12%
Desander advances to starch pressure: 320Kpa.
The sieve seam of pressurized screen is wide: 0.2mm
The sieve aperture of vibrating screen: 4.0mm.
Embodiment 4.
A kind of bamboo wood dissolving pulp sieve and wash technology, it comprises scalping technology A and fine screen technology B;
Described scalping technology A adopts one section desander, one section knotter, one section wash engine and one section to wash the joint machine, and concrete steps are:
A1, with the slurry in the boiling spraying pot through being pumped to knotter;
A2, in knotter, it is standby that the good slurry of the scalping by sieve aperture enters wash engine washing back, and the slag slurry by sieve aperture does not enter the joint machine of washing;
A3, in washing the joint machine, the knot in the slag slurry drains into after joint machine top spiral dries between waste residue reclaims from washing, and the good slurry that the slag slurry obtains after separating by the washing of washing the joint machine is back to knotter by desander, repeating step A2;
Described fine screen technology B adopts three sections pressurized screens, two sections desanders, one section wash engine and one section vibrating screen, and concrete steps are:
The good stock pump of scalping through the wash engine washing that B1, process scalping technology A obtain is delivered to one section pressurized screen;
B2, in one section pressurized screen, it is standby to enter wash engine washing back by the good slurry of the fine screen of sieve seam, the slag slurry by the sieve seam does not enter two sections pressurized screens behind desander;
B3, in two sections pressurized screens, by repeating step B2 in backflow of slurry to the section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter three sections pressurized screens behind desander;
B4, in three sections pressurized screens, by repeating step B3 in backflow of slurry to the two section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter vibrating screen;
B5, in vibrating screen, isolated good slurry is back to three sections pressurized screen repeating step B4, the slag that sifts out slurry drains between waste residue reclaims.
Wherein, the technological parameter of described scalping technology A is:
(1) advances to starch concentration: 5%
(2) deslagging ratio: 15%
(3) knotter advances to starch pressure: 350Kpa
(4) knotter operation pressure reduction: 80Kpa
(5) desander advances to starch pressure: 350Kpa
(6) sieve aperture of knotter is 9.5mm
(7) sieve aperture of washing the joint machine is 9.5mm.
Wherein, the technological parameter of described fine screen technology B is:
(1) advances to starch concentration: 3.5%
(2) one sections pressurized screens
Advance to starch pressure: 350Kpa
Advance to starch concentration: 3.2%
Deslagging ratio: 15%
(3) two sections pressurized screens
Advance to starch pressure: 350Kpa
Advance to starch concentration: 1.2%
Deslagging ratio: 15%
Desander advances to starch pressure: 350Kpa
(4) three sections pressurized screens
Advance to starch pressure: 350Kpa
Advance to starch concentration: 0.8%
Deslagging ratio: 13%
Desander advances to starch pressure: 350Kpa.
The sieve seam of pressurized screen is wide: 0.2mm
The sieve aperture of vibrating screen: 4.0mm.
The above only is a better embodiment of the present invention, so all equivalences of doing according to the described structure of patent claim of the present invention, feature and principle change or modify, is included in the patent claim of the present invention.
Claims (5)
- A bamboo wood dissolving pulp sieve and wash technology, it is characterized in that:It comprises scalping technology A and fine screen technology B;Described scalping technology A adopts one section desander, one section knotter, one section wash engine and one section to wash the joint machine, and concrete steps are:A1, with the slurry in the boiling spraying pot through being pumped to knotter;A2, in knotter, it is standby that the good slurry of the scalping by sieve aperture enters wash engine washing back, and the slag slurry by sieve aperture does not enter the joint machine of washing;A3, in washing the joint machine, the knot in the slag slurry drains into after joint machine top spiral dries between waste residue reclaims from washing, and the good slurry that the slag slurry obtains after separating by the washing of washing the joint machine is back to knotter by desander, repeating step A2;Described fine screen technology B adopts three sections pressurized screens, two sections desanders, one section wash engine and one section vibrating screen, and concrete steps are:The good stock pump of scalping through the wash engine washing that B1, process scalping technology A obtain is delivered to one section pressurized screen;B2, in one section pressurized screen, it is standby to enter wash engine washing back by the good slurry of the fine screen of sieve seam, the slag slurry by the sieve seam does not enter two sections pressurized screens behind desander;B3, in two sections pressurized screens, by repeating step B2 in backflow of slurry to the section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter three sections pressurized screens behind desander;B4, in three sections pressurized screens, by repeating step B3 in backflow of slurry to the two section pressurized screen of sieve seam, the slag slurry by the sieve seam does not enter vibrating screen;B5, in vibrating screen, isolated good slurry is back to three sections pressurized screen repeating step B4, the slag that sifts out slurry drains between waste residue reclaims.
- A kind of bamboo wood dissolving pulp according to claim 1 sieve and wash technology, it is characterized in that: the technological parameter of described scalping technology A is:(1) advances to starch concentration: 3%-5%(2) deslagging ratio: 10%-15%(3) knotter advances to starch pressure: 250Kpa-350Kpa(4) knotter operation pressure reduction: 20Kpa-80Kpa(5) desander advances to starch pressure: 275Kpa-350Kpa.
- A kind of bamboo wood dissolving pulp according to claim 1 sieve and wash technology, it is characterized in that: the sieve aperture of knotter is 9.5mm among the described scalping technology A, and the sieve aperture of washing the joint machine is 9.5mm.
- A kind of bamboo wood dissolving pulp according to claim 1 sieve and wash technology, it is characterized in that: the technological parameter of described fine screen technology B is:(1) advances to starch concentration: 0.7%-3.5%(2) one sections pressurized screensAdvance to starch pressure: 250Kpa-350KpaAdvance to starch concentration: 3.2%Deslagging ratio: 10%-15%(3) two sections pressurized screensAdvance to starch pressure: 250Kpa-350KpaAdvance to starch concentration: 1.2%Deslagging ratio: 8%-15%Desander advances to starch pressure: 275Kpa-350Kpa(4) three sections pressurized screensAdvance to starch pressure: 250Kpa-350KpaAdvance to starch concentration: 0.8%Deslagging ratio: 8%-13%Desander advances to starch pressure: 275Kpa-350Kpa.
- A kind of bamboo wood dissolving pulp according to claim 1 sieve and wash technology, it is characterized in that: the sieve of pressurized screen seam is wide among the described fine screen technology B is 0.2mm, and the sieve aperture of vibrating screen is 4.0mm.
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| CN 201110080515 CN102154891B (en) | 2011-03-31 | 2011-03-31 | Process for screening and cleaning bamboo wood dissolving slurry |
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| CN 201110080515 CN102154891B (en) | 2011-03-31 | 2011-03-31 | Process for screening and cleaning bamboo wood dissolving slurry |
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| CN102154891B CN102154891B (en) | 2012-07-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641252A (en) * | 2023-06-30 | 2023-08-25 | 重庆理文制浆有限公司 | System for washing, selecting and bleaching chemical pulp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504016A (en) * | 1982-07-02 | 1985-03-12 | Wikdahl Nils Anders Lennart | Process for cleaning chemical cellulose pulp by screening and apparatus |
| WO1995031597A1 (en) * | 1994-05-13 | 1995-11-23 | Valmet Corporation | Method for defibering recycled paper |
| CN1318666A (en) * | 2001-04-30 | 2001-10-24 | 黄文亚 | Pulp making and paper making process with low water consumption and less waste water exhausted |
| CN101158122A (en) * | 2007-11-15 | 2008-04-09 | 宜宾纸业股份有限公司 | Bamboo dissolved pulp manufacturing technique |
-
2011
- 2011-03-31 CN CN 201110080515 patent/CN102154891B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504016A (en) * | 1982-07-02 | 1985-03-12 | Wikdahl Nils Anders Lennart | Process for cleaning chemical cellulose pulp by screening and apparatus |
| WO1995031597A1 (en) * | 1994-05-13 | 1995-11-23 | Valmet Corporation | Method for defibering recycled paper |
| CN1318666A (en) * | 2001-04-30 | 2001-10-24 | 黄文亚 | Pulp making and paper making process with low water consumption and less waste water exhausted |
| CN101158122A (en) * | 2007-11-15 | 2008-04-09 | 宜宾纸业股份有限公司 | Bamboo dissolved pulp manufacturing technique |
Non-Patent Citations (1)
| Title |
|---|
| 《西南造纸》 20040430 唐德翠 等 纸浆洗选过程集散控制系统 17-18,23 1-5 第33卷, 第2期 2 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641252A (en) * | 2023-06-30 | 2023-08-25 | 重庆理文制浆有限公司 | System for washing, selecting and bleaching chemical pulp |
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