CN102976450A - Process for recovering alkali from squeezed waste liquid in viscose fiber production - Google Patents
Process for recovering alkali from squeezed waste liquid in viscose fiber production Download PDFInfo
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- CN102976450A CN102976450A CN2012105852808A CN201210585280A CN102976450A CN 102976450 A CN102976450 A CN 102976450A CN 2012105852808 A CN2012105852808 A CN 2012105852808A CN 201210585280 A CN201210585280 A CN 201210585280A CN 102976450 A CN102976450 A CN 102976450A
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- waste liquid
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Abstract
The invention discloses a process for recovering from squeezed waste liquid in the viscose fiber production. The process comprises the steps as follows: enabling the squeezed waste liquid and distilled water to flow through an inner cavity of a cation exchange membrane diffusion dialysis device at the same time, and controlling the flow speed of the squeezed waste liquid and water to enable the content of NaOH in the squeezed waste liquid flowing out from the cation exchange membrane diffusion dialysis device to be 15-25 g/L. According to the process, alkali in the squeezed waste liquid can be effectively recovered for reproduction, the acid consumption is reduced, the sewage treatment difficulty is lowered, the energy consumption is reduced, and the benefit of reducing the viscose fiber production cost can be obtained.
Description
Technical field
The present invention relates to the alkali recovery process of squeezing waste liquid in a kind of viscose fiber production.
Background technology
The production of viscose fiber generally comprises following operation: the operations such as alkali lye dipping, squeezing, yellow, spinning, traction, after finishing, squeezing process can produce a large amount of squeezing waste liquids, NaOH, hemicellulose and organic content are higher in the squeezing waste liquid, and the content of NaOH is approximately 100g/L.If the squeezing waste liquid is directly used in the alkali lye of preparation dipping usefulness, owing to contain the higher organism such as hemicellulose in the alkali lye, then so that the cellulose amount of alkali lye dipping reduces, reduced the dipping efficient of alkali lye.Existing processing mode is carried out wastewater treatment after being the complete hemicellulose of squeezing pulp thickening; Because the alkali content of squeezing waste liquid is higher, then can cause the consumption of acid to increase, and generate too much salt, strengthened the difficulty of processing waste water.
Summary of the invention
The technical problem to be solved in the present invention provides the alkali recovery process of squeezing waste liquid in a kind of viscose fiber production.
In order to solve the problems of the technologies described above, the technical scheme of the alkali recovery process of squeezing waste liquid was as follows during viscose fiber provided by the present invention was produced: allow squeezing waste liquid and the water cationic exchange membrane diffusion dialysis device inner chamber of flowing through simultaneously, the flow velocity of control squeezing waste liquid and water is so that NaOH content is 15-25g/L the squeezing waste liquid that flows out in cationic exchange membrane diffusion dialysis device.
Described squeezing waste liquid also need filter to remove solids impurity wherein before flowing into cationic exchange membrane diffusion dialysis device.
Described water is distilled water or pure water.
Existing processing mode is described in the background technology, in the squeezing waste liquid, add acid neutralization alkali wherein, need with a large amount of acid because alkali content is higher, hemicellulose is separated out after the neutralization, after extracting hemicellulose, process by sewage disposal device again, owing to can produce a large amount of salt in the N-process, strengthened the difficulty of sewage disposal.That is to say that existing processing mode not only makes the alkali of squeezing in the waste liquid be not used, but also a large amount of acid that consumed have strengthened the difficulty of sewage disposal simultaneously.Above-mentioned processing mode causes that raw material availability is low, wastage of material and energy consumption increase, and directly causes the rising of production cost.The most of alkali that best processing mode reclaims first in the squeezing waste liquid is used for producing again, make the content of alkali in the squeezing waste liquid maintain the level that the hemicellulose in the squeezing waste liquid can not be separated out, pass through great many of experiments, the level that the content of NaOH maintains 15-25g/L in the squeezing waste liquid just can reach the state that hemicellulose can not be separated out, cause the obstruction of cationic exchange membrane diffusion dialysis device in order to avoid in alkali recovery process, separate out hemicellulose, after adding the acid extraction hemicellulose, carry out again follow-up sewage disposal.The present invention just is being based on above-mentioned theory and is making, reclaim the most of alkali of squeezing in the waste liquid with cationic exchange membrane diffusion dialysis device, entering regeneration after alkali reclaims produces, after reclaiming, most of alkali only needs to extract hemicellulose with the small portion alkali in a small amount of acid neutralization squeezing waste liquid, because the amount of the salt that generates is less, therefore can effectively reduce the difficulty of sewage disposal.
In sum, the invention has the advantages that but alkali in the efficient recovery squeezing waste liquid is used for producing again and energy consumption is low, efficient is high, reduce sour consumption, reduced the sewage disposal difficulty, can bring the beneficial effect that economizes on resources, reduces the viscose fiber production cost.
Embodiment
Cationic exchange membrane diffusion dialysis device is currently available products, the water outlet that it has the water-in that flows into for distilled water or pure water, flow out for distilled water or pure water, the fluid inlet that flows into for waste liquid and the liquid outlet that flows out for waste liquid; Its inside is divided into a plurality of excessively water chamber and crosses the sap cavity chamber by some cationic exchange diaphragms and baffle interval setting; An end of crossing water chamber is communicated with water-in, and the other end of crossing water chamber is communicated with water outlet; An end of crossing the sap cavity chamber is communicated with fluid inlet, and the other end of crossing the sap cavity chamber is communicated with liquid outlet.
Behind the first solids impurity of removing after filtration wherein of squeezing waste liquid in the viscose fiber production, to squeeze again waste liquid and send into cationic exchange membrane diffusion dialysis device by fluid inlet, squeezing waste liquor stream process sap cavity flows out from liquid outlet behind the chamber, simultaneously distilled water or pure water are sent into cationic exchange membrane diffusion dialysis device by water-in, distilled water or pure water stream flow out from water outlet through after the water chamber; Descended Na in the indoor squeezing waste liquid of sap cavity in the effect of cationic exchange membrane
+Ion preferentially by cationic exchange membrane, entered into distilled water or pure water in the water chamber, along with Na in the squeezing waste liquid
+Passing through of ion, the OH of small volume
-Ion also entered in the water chamber by cationic exchange membrane, to keep the charge balance of cationic exchange membrane both sides.To be higher than water chamber far away owing to cross the concentration of the total soluble matters of solution in the sap cavity, so the OH in the squeezing waste liquid
-Ion and Na
+Ion can enter into distilled water one side by cationic exchange membrane in a large number, until the osmotic pressure of cationic exchange membrane both sides solution reaches balance, diffusion just can stop.By controlling the take-off rate that flows to that flows to take-off rate and control distilled water or pure water of squeezing waste liquid, just can make the content of NaOH from the squeezing waste liquid that liquid outlet flows out is 15-25g/L, and from the water outlet outflow then is alkali lye.That is to say the squeezing waste liquid after above-mentioned processing, most of alkali wherein is recovered, can be used for producing again, and the squeezing waste liquid after alkali reclaims then enters subsequent handling.
Claims (3)
1. the alkali recovery process of squeezing waste liquid during a viscose fiber is produced, it is characterized in that allowing squeezing waste liquid and the water cationic exchange membrane diffusion dialysis device inner chamber of flowing through simultaneously, the flow velocity of control squeezing waste liquid and water is so that NaOH content is 15-25g/L the squeezing waste liquid that flows out in cationic exchange membrane diffusion dialysis device.
2. the alkali recovery process of squeezing waste liquid during viscose fiber as claimed in claim 1 is produced, it is characterized in that described squeezing waste liquid flows into cationic exchange membrane diffusion dialysis device before, also need filter to remove solids impurity wherein.
3. the alkali recovery process of squeezing waste liquid is characterized in that described water is distilled water or pure water during viscose fiber as claimed in claim 1 or 2 was produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105852808A CN102976450A (en) | 2012-12-30 | 2012-12-30 | Process for recovering alkali from squeezed waste liquid in viscose fiber production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105852808A CN102976450A (en) | 2012-12-30 | 2012-12-30 | Process for recovering alkali from squeezed waste liquid in viscose fiber production |
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| CN102976450A true CN102976450A (en) | 2013-03-20 |
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| CN2012105852808A Pending CN102976450A (en) | 2012-12-30 | 2012-12-30 | Process for recovering alkali from squeezed waste liquid in viscose fiber production |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265094A (en) * | 2013-06-01 | 2013-08-28 | 山东天维膜技术有限公司 | Method for recycling nitric acid and copper from waste water generated in production of printed circuit board |
| CN103349911A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Diffusion dialysis pretreatment technology for recovery of electrodialysis alkali from pressed liquor in production of viscose fiber |
| CN103352389A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Preprocessing method for black liquor in diffusion dialysis recycling pulp manufacture |
| CN103349909A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Post-processing method for squeezed alkali liquid in diffusion dialysis recycling viscose manufacture |
| CN103349908A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Method for squeezing alkali liquid in diffusion dialysis recycling viscose manufacture |
| CN103349912A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Pretreatment technology of electrodialysis alkali recovery during viscose fiber production |
| CN103349913A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Novel alkali recovery technology during viscose fiber production |
| CN103349910A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Pre-treatment method for pressed alkali liquor in manufacturing of recycling viscose by diffusion dialysis |
| CN103397408A (en) * | 2013-07-24 | 2013-11-20 | 宜宾海丝特纤维有限责任公司 | Pretreatment method for recovering pressing alkali liquor in viscose fiber production by diffusion dialysis |
| CN104556231A (en) * | 2014-12-27 | 2015-04-29 | 山东天维膜技术有限公司 | Preparation method of sodium tungstate solution and method for recovering alkaline in preparation process |
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| CN1450001A (en) * | 2003-05-15 | 2003-10-22 | 凯能高科技工程（上海）有限公司 | Method for recovering alkali and hemicellulose from chemical fibre waste liquid |
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| CN201305463Y (en) * | 2008-12-03 | 2009-09-09 | 上海轻工业研究所有限公司 | Waste acid or waste alkali recovery device for automatic diffusion dialysis industry |
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2012
- 2012-12-30 CN CN2012105852808A patent/CN102976450A/en active Pending
Patent Citations (3)
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| CN1450001A (en) * | 2003-05-15 | 2003-10-22 | 凯能高科技工程（上海）有限公司 | Method for recovering alkali and hemicellulose from chemical fibre waste liquid |
| CN101148280A (en) * | 2007-09-05 | 2008-03-26 | 三达膜科技（厦门）有限公司 | Purifying and reclaiming method for alkali waste water based on film technique |
| CN201305463Y (en) * | 2008-12-03 | 2009-09-09 | 上海轻工业研究所有限公司 | Waste acid or waste alkali recovery device for automatic diffusion dialysis industry |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265094A (en) * | 2013-06-01 | 2013-08-28 | 山东天维膜技术有限公司 | Method for recycling nitric acid and copper from waste water generated in production of printed circuit board |
| CN103397408A (en) * | 2013-07-24 | 2013-11-20 | 宜宾海丝特纤维有限责任公司 | Pretreatment method for recovering pressing alkali liquor in viscose fiber production by diffusion dialysis |
| CN103349913B (en) * | 2013-07-24 | 2015-04-22 | 宜宾海丝特纤维有限责任公司 | Novel alkali recovery technology during viscose fiber production |
| CN103349909A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Post-processing method for squeezed alkali liquid in diffusion dialysis recycling viscose manufacture |
| CN103349908A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Method for squeezing alkali liquid in diffusion dialysis recycling viscose manufacture |
| CN103349912A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Pretreatment technology of electrodialysis alkali recovery during viscose fiber production |
| CN103349913A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Novel alkali recovery technology during viscose fiber production |
| CN103349910A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Pre-treatment method for pressed alkali liquor in manufacturing of recycling viscose by diffusion dialysis |
| CN103349911A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Diffusion dialysis pretreatment technology for recovery of electrodialysis alkali from pressed liquor in production of viscose fiber |
| CN103352389A (en) * | 2013-07-24 | 2013-10-16 | 宜宾海丝特纤维有限责任公司 | Preprocessing method for black liquor in diffusion dialysis recycling pulp manufacture |
| CN103352389B (en) * | 2013-07-24 | 2016-06-29 | 宜宾海丝特纤维有限责任公司 | The preprocess method of black digestion liquid during pulp manufactures is reclaimed in a kind of diffusion dialysis |
| CN103349911B (en) * | 2013-07-24 | 2015-04-22 | 宜宾海丝特纤维有限责任公司 | Diffusion dialysis pretreatment technology for recovery of electrodialysis alkali from pressed liquor in production of viscose fiber |
| CN103349908B (en) * | 2013-07-24 | 2015-07-01 | 宜宾海丝特纤维有限责任公司 | Method for squeezing alkali liquid in diffusion dialysis recycling viscose manufacture |
| CN103349909B (en) * | 2013-07-24 | 2015-07-01 | 宜宾海丝特纤维有限责任公司 | Post-processing method for squeezed alkali liquid in diffusion dialysis recycling viscose manufacture |
| CN103349910B (en) * | 2013-07-24 | 2015-07-01 | 宜宾海丝特纤维有限责任公司 | Pre-treatment method for pressed alkali liquor in manufacturing of recycling viscose by diffusion dialysis |
| CN103349912B (en) * | 2013-07-24 | 2015-09-16 | 宜宾海丝特纤维有限责任公司 | The pretreating process of electrodialysis alkali collection in a kind of viscose rayon production |
| CN103397408B (en) * | 2013-07-24 | 2016-01-20 | 宜宾海丝特纤维有限责任公司 | The preprocess method of press lye in viscose production is reclaimed in a kind of diffusion dialysis |
| CN104556231A (en) * | 2014-12-27 | 2015-04-29 | 山东天维膜技术有限公司 | Preparation method of sodium tungstate solution and method for recovering alkaline in preparation process |
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Application publication date: 20130320 |