CN102154881A - Process for washing bamboo wood dissolving pulp - Google Patents
Process for washing bamboo wood dissolving pulp Download PDFInfo
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- CN102154881A CN102154881A CN 201110080526 CN201110080526A CN102154881A CN 102154881 A CN102154881 A CN 102154881A CN 201110080526 CN201110080526 CN 201110080526 CN 201110080526 A CN201110080526 A CN 201110080526A CN 102154881 A CN102154881 A CN 102154881A
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Abstract
The invention belongs to the technical field of preparation of dissolving pulp, and particularly relates to a process for washing bamboo wood dissolving pulp. The process for washing the bamboo wood dissolving pulp specifically comprises the following steps that: A, washing hot water is added from a fourth delignification pulp washer, and filtrate from the fourth delignification pulp washer enters a third delignification pulp washer for washing; B, filtrate from the third delignification pulp washer enters a second fine screening pulp washer for washing; C, filtrate from the second fine screening pulp washer enters a first coarse screening pulp washer for washing; and D, filtrate from the first coarse screening pulp washer is fed into a cooking process to be used. Water resources and damage of waste water to environment are reduced by recycling washing water.
Description
Technical field
The invention belongs to the preparing technical field of dissolving pulp, be specifically related to a kind of washing process 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.
But existing bamboo wood dissolving pulp production equipment is relative with technology backward, and particularly washing process is because the backwardness of equipment and technology, has caused the waste of water resource and to environment damage.
Application number is the preparation method that 200810147992.5 Chinese invention patent has been introduced a kind of bamboo chemical dissolving pulp, wherein introduced washing process and mainly adopted the vacuum of 4 series connection or pressure wash engine to wash, there is water resource waste equally in this technology and destroys problem of environment.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, and provide a kind of and save water resource, reduce washing process the bamboo wood dissolving pulp of environmental disruption.
The object of the present invention is achieved like this:
A kind of washing process of bamboo wood dissolving pulp, it adopts the mode of 4 wash engine countercurrent washings, and described wash engine is respectively the first scalping wash engine, the second fine screen wash engine, the 3rd oxygen-delignified pulp wash engine and the 4th oxygen delignification wash engine, concrete technology is:
A, hot wash-water add from the 4th oxygen delignification wash engine, and the filtrate of the 4th oxygen delignification wash engine enters the 3rd oxygen-delignified pulp wash engine and washs;
The filtrate of B, the 3rd oxygen-delignified pulp wash engine enters the second fine screen wash engine and washs;
The filtrate of C, the second fine screen wash engine enters the first scalping wash engine and washs;
The filtrate of D, the first scalping wash engine is delivered to cooking process and is used.
Wherein, the technological parameter of described wash engine is:
(1) advances to starch concentration: 2.5%-4.0%;
(2) advance to starch pressure 50-70Kpa
(3) pulp concentration: 10%-14%;
(5) wash temperature: 80-95 ℃;
(6) washing factor: 2.5;
Wherein, described wash engine is closed wash engine.
Wherein, described wash engine is the CB wash engine.
Beneficial effect of the present invention is: the washing process of this kind bamboo wood dissolving pulp is specially: A, hot wash-water add from the 4th oxygen delignification wash engine, and the filtrate of the 4th oxygen delignification wash engine enters the 3rd oxygen-delignified pulp wash engine and washs; The filtrate of B, the 3rd oxygen-delignified pulp wash engine enters the second fine screen wash engine and washs; The filtrate of C, the second fine screen wash engine enters the first scalping wash engine and washs; The filtrate of D, the first scalping wash engine is delivered to cooking process and is used.The present invention has saved water resource by the recycling to washings, has alleviated waste water to environment damage.
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
The preparation technology of bamboo wood dissolving pulp comprise successively get the raw materials ready, boiling, screening (scalping and fine screen), washing, bleaching (oxygen delignification and), the operation of manufacturing paper with pulp.Present embodiment is introduced a kind of washing process of bamboo wood dissolving pulp, it adopts the mode of 4 wash engine countercurrent washings, and described wash engine is respectively the first scalping wash engine, the second fine screen wash engine, the 3rd oxygen-delignified pulp wash engine and the 4th oxygen delignification wash engine, concrete technology is:
A, hot wash-water add from the 4th oxygen delignification wash engine, and the filtrate of the 4th oxygen delignification wash engine enters the 3rd oxygen-delignified pulp wash engine and washs;
The filtrate of B, the 3rd oxygen-delignified pulp wash engine enters the second fine screen wash engine and washs;
The filtrate of C, the second fine screen wash engine enters the first scalping wash engine and washs;
The filtrate of D, the first scalping wash engine is delivered to cooking process and is used.
Wherein, the technological parameter of described wash engine is:
(1) advances to starch concentration: 2.5%;
(2) advance to starch pressure 50Kpa
(3) pulp concentration: 10%;
(5) wash temperature: 80 ℃;
(6) washing factor: 2.5;
Described wash engine is closed wash engine, adopts the CB wash engine, can avoid foul smell excessive.
Embodiment 2
The preparation technology of bamboo wood dissolving pulp comprise successively get the raw materials ready, boiling, screening (scalping and fine screen), washing, bleaching (oxygen delignification and), the operation of manufacturing paper with pulp.Present embodiment is introduced a kind of washing process of bamboo wood dissolving pulp, it adopts the mode of 4 wash engine countercurrent washings, and described wash engine is respectively the first scalping wash engine, the second fine screen wash engine, the 3rd oxygen-delignified pulp wash engine and the 4th oxygen delignification wash engine, concrete technology is:
A, hot wash-water add from the 4th oxygen delignification wash engine, and the filtrate of the 4th oxygen delignification wash engine enters the 3rd oxygen-delignified pulp wash engine and washs;
The filtrate of B, the 3rd oxygen-delignified pulp wash engine enters the second fine screen wash engine and washs;
The filtrate of C, the second fine screen wash engine enters the first scalping wash engine and washs;
The filtrate of D, the first scalping wash engine is delivered to cooking process and is used.
Wherein, the technological parameter of described wash engine is:
(1) advances to starch concentration: 3.0%;
(2) advance to starch pressure 58Kpa
(3) pulp concentration: 12%;
(5) wash temperature: 85 ℃;
(6) washing factor: 2.5;
Described wash engine is closed wash engine, adopts the CB wash engine, can avoid foul smell excessive.
Embodiment 3
The preparation technology of bamboo wood dissolving pulp comprise successively get the raw materials ready, boiling, screening (scalping and fine screen), washing, bleaching (oxygen delignification and), the operation of manufacturing paper with pulp.Present embodiment is introduced a kind of washing process of bamboo wood dissolving pulp, it adopts the mode of 4 wash engine countercurrent washings, and described wash engine is respectively the first scalping wash engine, the second fine screen wash engine, the 3rd oxygen-delignified pulp wash engine and the 4th oxygen delignification wash engine, concrete technology is:
A, hot wash-water add from the 4th oxygen delignification wash engine, and the filtrate of the 4th oxygen delignification wash engine enters the 3rd oxygen-delignified pulp wash engine and washs;
The filtrate of B, the 3rd oxygen-delignified pulp wash engine enters the second fine screen wash engine and washs;
The filtrate of C, the second fine screen wash engine enters the first scalping wash engine and washs;
The filtrate of D, the first scalping wash engine is delivered to cooking process and is used.
Wherein, the technological parameter of described wash engine is:
(1) advances to starch concentration: 3.5%;
(2) advance to starch pressure 65Kpa
(3) pulp concentration: 13%;
(5) wash temperature: 90 ℃;
(6) washing factor: 2.5;
Described wash engine is closed wash engine, adopts the CB wash engine, can avoid foul smell excessive.
Embodiment 4
The preparation technology of bamboo wood dissolving pulp comprise successively get the raw materials ready, boiling, screening (scalping and fine screen), washing, bleaching (oxygen delignification and), the operation of manufacturing paper with pulp.Present embodiment is introduced a kind of washing process of bamboo wood dissolving pulp, it adopts the mode of 4 wash engine countercurrent washings, and described wash engine is respectively the first scalping wash engine, the second fine screen wash engine, the 3rd oxygen-delignified pulp wash engine and the 4th oxygen delignification wash engine, concrete technology is:
A, hot wash-water add from the 4th oxygen delignification wash engine, and the filtrate of the 4th oxygen delignification wash engine enters the 3rd oxygen-delignified pulp wash engine and washs;
The filtrate of B, the 3rd oxygen-delignified pulp wash engine enters the second fine screen wash engine and washs;
The filtrate of C, the second fine screen wash engine enters the first scalping wash engine and washs;
The filtrate of D, the first scalping wash engine is delivered to cooking process and is used.
Wherein, the technological parameter of described wash engine is:
(1) advances to starch concentration: 4.0%;
(2) advance to starch pressure 70Kpa
(3) pulp concentration: 14%;
(5) wash temperature: 95 ℃;
(6) washing factor: 2.5;
Described wash engine is closed wash engine, adopts the CB wash engine, can avoid foul smell excessive.
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 (4)
1. the washing process of a bamboo wood dissolving pulp, it is characterized in that: it adopts the mode of 4 wash engine countercurrent washings, and described wash engine is respectively the first scalping wash engine, the second fine screen wash engine, the 3rd oxygen-delignified pulp wash engine and the 4th oxygen delignification wash engine, concrete technology is:
A, hot wash-water add from the 4th oxygen delignification wash engine, and the filtrate of the 4th oxygen delignification wash engine enters the 3rd oxygen-delignified pulp wash engine and washs;
The filtrate of B, the 3rd oxygen-delignified pulp wash engine enters the second fine screen wash engine and washs;
The filtrate of C, the second fine screen wash engine enters the first scalping wash engine and washs;
The filtrate of D, the first scalping wash engine is delivered to cooking process and is used.
2. the washing process of a kind of bamboo wood dissolving pulp according to claim 1, it is characterized in that: the technological parameter of described wash engine is:
(1) advances to starch concentration: 2.5%-4.0%;
(2) advance to starch pressure 50-70Kpa
(3) pulp concentration: 10%-14%;
(5) wash temperature: 80-95 ℃;
(6) washing factor: 2.5.
3. the washing process of a kind of bamboo wood dissolving pulp according to claim 1 and 2, it is characterized in that: described wash engine is closed wash engine.
4. the washing process of a kind of bamboo wood dissolving pulp according to claim 1 and 2, it is characterized in that: described wash engine is the CB wash engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110080526 CN102154881A (en) | 2011-03-31 | 2011-03-31 | Process for washing bamboo wood dissolving pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110080526 CN102154881A (en) | 2011-03-31 | 2011-03-31 | Process for washing bamboo wood dissolving pulp |
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| Publication Number | Publication Date |
|---|---|
| CN102154881A true CN102154881A (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110080526 Pending CN102154881A (en) | 2011-03-31 | 2011-03-31 | Process for washing bamboo wood dissolving pulp |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337693A (en) * | 2011-09-30 | 2012-02-01 | 重庆理文造纸有限公司 | Process for stewing and washing dissolving pulp |
| 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 |
| CN116716753A (en) * | 2023-06-30 | 2023-09-08 | 重庆理文制浆有限公司 | Pulping system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204712A (en) * | 1997-07-07 | 1999-01-13 | 杨杰 | Pulp washing screening technology of black liquor extraction rate achieved 95% and basically no washing waste water discharging |
| CN1818206A (en) * | 2005-02-07 | 2006-08-16 | 上海造纸机械电控技术研究所 | Paper-pulp washing process and optimizing control |
-
2011
- 2011-03-31 CN CN 201110080526 patent/CN102154881A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204712A (en) * | 1997-07-07 | 1999-01-13 | 杨杰 | Pulp washing screening technology of black liquor extraction rate achieved 95% and basically no washing waste water discharging |
| CN1818206A (en) * | 2005-02-07 | 2006-08-16 | 上海造纸机械电控技术研究所 | Paper-pulp washing process and optimizing control |
Non-Patent Citations (1)
| Title |
|---|
| 《轻工机械》 19960331 王锡元 置换洗浆过程及系统的优化（下） 3-6,13 1-4 , 第1期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337693A (en) * | 2011-09-30 | 2012-02-01 | 重庆理文造纸有限公司 | Process for stewing and washing dissolving pulp |
| CN102337693B (en) * | 2011-09-30 | 2014-01-22 | 重庆理文造纸有限公司 | Process for stewing and washing dissolving pulp |
| 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 |
| CN116716753A (en) * | 2023-06-30 | 2023-09-08 | 重庆理文制浆有限公司 | Pulping system |
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Application publication date: 20110817 |