CN102659267A - Removing method of PVA (polyvinyl acetate) in desizing wastewater and device - Google Patents
Removing method of PVA (polyvinyl acetate) in desizing wastewater and device Download PDFInfo
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- CN102659267A CN102659267A CN201210167050XA CN201210167050A CN102659267A CN 102659267 A CN102659267 A CN 102659267A CN 201210167050X A CN201210167050X A CN 201210167050XA CN 201210167050 A CN201210167050 A CN 201210167050A CN 102659267 A CN102659267 A CN 102659267A
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Abstract
The invention discloses a removing method of PVA (polyvinyl acetate) desizing wastewater, which comprises the following steps: mixing PVA-containing desizing wastewater and agglomerant solution consisting of borax and anhydrous sodium sulphate; feeding the mixed desizing wastewater and agglomerant solution into a PVA agglutination reactor to react and generate a PVA solid aggregate; discharging the generated PVA solid aggregate and the solid-liquid mixture of wastewater from the PVA agglutination reactor, and feeding into a solid-liquid separator; and independently collecting the wastewater and PVA solid after the mixture is separated through the solid-liquid separator. The invention also discloses a removing device of PVA in the desizing wastewater.
Description
Technical field
The present invention relates to technical field of waste water processing, particularly relate to removal method and the device of PVA in a kind of desized wastewater.
Background technology
In field of textiles, PVA, promptly Z 150PH is used for warp sizing in a large number, and it has, and starch finishing effect is good, good film-forming property and the good advantage of wear resisting property, is a kind of extraordinary warp sizing material.PVA is widely used in the starching of cotton fibre and chemical fibre, makes yarn accomplish the operation of weaving cotton cloth smoothly.But after weaving completion; Slurry on the cloth need fade away, so contains a large amount of PVA in the desized wastewater, and the biodegradability of PVA ability extreme difference; After getting into Sewage treatment systems; Utmost point bio-refractory is removed, and brings very big puzzlement to WWT, and does not have good way to come the PVA in the desized wastewater is removed and handles as yet at present.
Summary of the invention
Based on this,, be necessary to propose removal method and the device of PVA in a kind of desized wastewater to the problems referred to above.
For solving the problems of the technologies described above, the invention provides the removal method of PVA in a kind of desized wastewater, may further comprise the steps:
The desized wastewater that contains PVA mixes with the agglutinant solution of being made up of borax, Sodium sulfate anhydrous.min(99);
Mixed desized wastewater and agglutinant solution get into the reaction of PVA agglutometer, generate PVA solid condensation prod;
The PVA solid condensation prod that generates and the solidliquid mixture of waste water are discharged in the PVA agglutometer, get into solid-liquid separator;
Through waste water after the solid-liquid separator separation and the single collection processing separately of PVA solid.
Agglutinant is made up of borax and Sodium sulfate anhydrous.min(99); Can be effectively and the PVA in the desized wastewater chemical reaction takes place, generate the PVA solid, the PVA solid of generation through solid-liquid separator with PVA solid and liquid separation; With PVA solid and waste water difference single collection; After having removed the desized wastewater entering Sewage treatment systems of PVA, just alleviated the burden of WWT, and this kind method efficiency ratio is higher.
Among embodiment, further comprising the steps of therein: the desized wastewater of the mixed PVA of containing reacts under the high speed shear stirring with the agglutinant solution of being made up of borax, Sodium sulfate anhydrous.min(99), and stirring velocity is 300rpm-20000rpm.Desized wastewater and coagulant solution can effectively be carried out powerful dispersing and mixing under high speed shear stirs, accelerated the speed of congealing reaction greatly.
Among embodiment, further comprising the steps of therein: mixed desized wastewater and agglutinant solution continue to get into the PVA agglutometer, and the time that in the PVA agglutometer, stops reaction is 3min-120min.Purpose is to guarantee saltouing to condense and reaching good effect of PVA.Through the flow velocity of control desized wastewater and coagulant solution, make mixing solutions stop 3min-120min at the PVA agglutometer, because the saltouing to condense and be not the moment completion of PVA, the time that solution stops in reactor drum is the PVA agglomerative time.
Among embodiment, further comprising the steps of: the temperature of reaction of mixed desized wastewater and agglutinant solution is 0 ℃-100 ℃ therein.In 0 ℃-100 ℃ scope, be the optimal reaction temperature of desized wastewater and agglutinant.
The beneficial effect of the removal method of PVA is in the desized wastewater according to the invention: method is simple, easy to operate, efficient is high, and removes the effective of PVA.
For solving the problems of the technologies described above; The present invention also provides the removal device of PVA in a kind of desized wastewater; It comprises container, solution mixer, PVA agglutometer and the solid-liquid separator that is used for splendid attire agglutinant solution; The discharge port of said container is connected with the opening for feed of said solution mixer through first pipeline, and the opening for feed of said solution mixer also is provided with second pipeline that is used to import desized wastewater, on said first pipeline and said second pipeline, is equipped with flow regulator; The discharge port of said solution mixer is connected with the opening for feed of said PVA agglutometer, and the discharge port of said PVA agglutometer is connected with the opening for feed of said solid-liquid separator.
Desized wastewater is inserted second pipeline, and agglutinant in first pipeline and the desized wastewater in second pipeline are through the control of flow regulator, according to carrying out powerful dispersing and mixing in the corresponding ratio entering solution mixer; Accelerate the carrying out of congealing reaction; In solution mixer, mix the mixing solutions finish and get into and carry out saltouing of PVA in the PVA agglutometer and condense, condense when saltouing finish after, just from the discharge port discharge of PVA agglutometer; Get in the solid-liquid separator; Solid-liquid separator separates the PVA solid that produces with waste water, PVA solid and waste water is single collection respectively, has promptly accomplished the removal process of PVA in the whole desized wastewater.
Therein among embodiment; Said PVA agglutometer comprises reaction vessel, is located at the motor of interior stirrer of reaction vessel and driving stirrer; The opening for feed of said reaction vessel is connected with the discharge port of said solution mixer, and the discharge port of said reaction vessel is connected with the opening for feed of said solid-liquid separator.Purpose is to guarantee that the reaction in the PVA agglutometer is a successive process, thereby improves the working efficiency of whole device.
Therein among embodiment; Said PVA agglutometer comprises placed in-line low speed reaction vessel and high speed reaction vessel, is located at the high speed shear stirrer in the high speed reaction vessel and is located at the low-speed mixer in the low speed reaction vessel; The opening for feed of said high speed reaction vessel is connected with the discharge port of said solution mixer, and the discharge port of said low speed reaction vessel is connected with the opening for feed of said solid-liquid separator.Purpose is to guarantee that the reaction in the PVA agglutometer is a successive process, thereby improves the working efficiency of whole device.
Among embodiment, said high speed reaction vessel comprises two to ten placed in-line successively high speed reaction vessels, is equipped with the high speed shear stirrer in each said high speed reaction vessel therein.Purpose is to guarantee to produce in the high speed reaction vessel non-eddy current shape to mix, and the PVA solid of generation is Powdered, the too tiny filtering separation that is unfavorable for.
Therein among embodiment; Said solid-liquid separator comprises liquid storage pool, be located at the crawler-tread mechanism directly over the liquid storage pool and be located at the PVA solid collection frame under the crawler-tread mechanism end; Crawler belt in the said crawler-tread mechanism is provided with diameter less than PVA solid filter pore, said crawler-tread mechanism be located at said PVA agglutometer discharge port under.Purpose is make solid-liquid separator simple in structure, reduces cost, and guarantees the respond well of solid-liquid separator simultaneously.
Among embodiment, said solution mixer is pipeline high-shear emulsion machine or line mixer therein.Purpose is to guarantee that desized wastewater and condensing agent can carry out powerful dispersing and mixing in solution mixer.
The beneficial effect of the removal device of PVA is in the desized wastewater according to the invention: whole device simple in structure, principle of work is simple, working process is simple, respond well, low cost of manufacture, can effectively remove the PVA in the desized wastewater.
Description of drawings
Fig. 1 is the structural representation of the embodiment of removal device of PVA in the desized wastewater according to the invention;
Fig. 2 is the structural representation of another embodiment of removal device of PVA in the desized wastewater according to the invention;
Description of reference numerals:
The 101-container, 102-pipeline high-shear emulsion machine, 103-line mixer, 104-first pipeline; 105-second pipeline, 106-flow regulator, 107-reaction vessel, 108-stirrer; The 109-motor, 110-liquid storage pool, 111-crawler-tread mechanism, 112-PVA solid collection frame; 113-high speed reaction vessel, 114-low speed reaction vessel, 115-high speed shear stirrer, 116-low-speed mixer.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
Method embodiment:
Referring to Fig. 1, Fig. 2, the removal method of PVA in a kind of desized wastewater may further comprise the steps:
Step 1 is collected the desized wastewater that contains PVA, and the desized wastewater that will contain PVA mixes through solution mixer with the agglutinant solution ratio of being made up of borax, Sodium sulfate anhydrous.min(99) as required.
Step 2 is reacted mixed desized wastewater and agglutinant solution extraction entering PVA agglutometer, generates PVA solid condensation prod.Wherein, the stirring velocity of the stirrer in the PVA agglutometer is adjusted into 300rpm-20000rpm, and the time that in the PVA agglutometer, stops reaction is 3min-120min, 0 ℃-100 ℃ of temperature controls.
Step 3 is discharged the PVA solid condensation prod that generates and the solidliquid mixture of waste water in the PVA agglutometer, get into solid-liquid separator.
Step 4 through waste water after the solid-liquid separator separation and the single collection processing separately of PVA solid, enters Sewage treatment systems with waste water.
Agglutinant is made up of borax and Sodium sulfate anhydrous.min(99); Can be effectively and the PVA in the desized wastewater chemical reaction takes place, generate the PVA solid, the PVA solid of generation through solid-liquid separator with PVA solid and liquid separation; With PVA solid and waste water difference single collection; After having removed the desized wastewater entering Sewage treatment systems of PVA, just alleviated the burden of WWT, and this kind method efficiency ratio is higher.
Device embodiment 1:
As shown in Figure 1, the removal device of PVA in a kind of desized wastewater, it comprises container 101, solution mixer, PVA agglutometer and the solid-liquid separator that is used for splendid attire agglutinant solution, said solution mixer is a pipeline high-shear emulsion machine 102.The discharge port of said container 101 is connected with the opening for feed of said pipeline high-shear emulsion machine 102 through first pipeline 104; The opening for feed of said pipeline high-shear emulsion machine 102 also is provided with second pipeline, 105, the second pipelines 105 that are used to import desized wastewater and is connected to the desized wastewater the inside that contains PVA.On said first pipeline 104 and said second pipeline 105, be equipped with flow regulator 106.
In the present embodiment; Said PVA agglutometer comprises reaction vessel 107, be located at the stirrer 108 in the reaction vessel 107 and drive the motor 109 of stirrer 108; The opening for feed of said reaction vessel 107 is connected with the discharge port of said pipeline high-shear emulsion machine 102, and the discharge port of said reaction vessel 107 is connected with the opening for feed of said solid-liquid separator.Can guarantee that like this reaction in the PVA agglutometer is a successive process, thereby improve the working efficiency of whole device.
In the present embodiment; Said solid-liquid separator comprises liquid storage pool 110, be located at the crawler-tread mechanism 111 directly over the liquid storage pool 110 and be located at the PVA solid collection frame 112 under crawler-tread mechanism 111 ends; Crawler belt in the said crawler-tread mechanism 111 is provided with diameter less than PVA solid filter pore, being evenly distributed of filter pore.Said crawler-tread mechanism 111 be located at said reaction vessel 107 discharge port under.
The working process of the described device of the foregoing description is following:
The desized wastewater that contains PVA through second pipeline 105 is sent pipeline high-shear emulsion machine 102 to through pump flow velocity ratio on demand respectively with the coagulant solution that is stored in the container 101; Carrying out high speed shear mixes; Mixing solutions gets in the reaction vessel 107 then; Under stirrer 108 high-speed stirring of 107 li of reaction vessels, generate the mixture of PVA solid and waste water, this solidliquid mixture is discharged reaction vessel 107 and is got into solid-liquid separator.The major portion of solid-liquid separator is the crawler-tread mechanism 111 with filter pore, makes the PVA solid be transmitted and gets into PVA solid collection basket.The raffinate that liquid storage pool is 110 li is pumped into Sewage treatment systems.
The described device technique key of the foregoing description is:
(1) desized wastewater and coagulant solution are carried out powerful dispersing and mixing for 102 li in the pipeline high-shear emulsion machine, accelerate the carrying out of congealing reaction greatly.
(2) flow velocity of control desized wastewater and condensing agent mixing solutions; Make that mixing solutions is 3min-120min in 107 li residence time of reaction vessel; The saltouing of PVA condensed and is not what moment accomplished, and solution is the PVA congealing reaction time in the residence time of 107 li of reaction vessels.
(3) travelling speed of stirrer 108 must be fast; Be preferably in more than the 500rpm; The reason that stirring will be sought quickness is both can accelerate the PVA congealing reaction to carry out, again can be so that the PVA solid particulate that generates is littler, and solidliquid mixture gets into solid-liquid separator through pipeline more easily and is unlikely to plugging.
Device embodiment 2:
As shown in Figure 2, the removal device of PVA in a kind of desized wastewater, it comprises container 101, solution mixer, PVA agglutometer and the solid-liquid separator that is used for splendid attire agglutinant solution, said solution mixer is a line mixer 103.The discharge port of said container 101 is connected with the opening for feed of said line mixer 103 through first pipeline 104; The opening for feed of said line mixer 103 also is provided with second pipeline, 105, the second pipelines 105 that are used to import desized wastewater and is connected to the desized wastewater the inside that contains PVA.On said first pipeline 104 and said second pipeline 105, be equipped with flow regulator 106.
In the present embodiment; Said PVA agglutometer comprises placed in-line low speed reaction vessel 114 and high speed reaction vessel 113, is located at the high speed shear stirrer 115 in the high speed reaction vessel 113 and is located at the low-speed mixer 116 in the low speed reaction vessel 114; The opening for feed of said high speed reaction vessel 113 is connected with the discharge port of said line mixer 103, and the discharge port of said low speed reaction vessel 114 is connected with the opening for feed of said solid-liquid separator.Can guarantee that the reaction in the PVA agglutometer is a successive process, thereby improve the working efficiency of whole device.
In the present embodiment, said high speed reaction vessel 113 comprises two placed in-line successively high speed reaction vessels 113, and certainly, three to ten high speed reaction vessel 113 series connection also are fine.Be equipped with high speed shear stirrer 115 in each said high speed reaction vessel 113.Can guarantee to produce in the high speed reaction vessel 113 non-eddy current shape and mix, the PVA solid of generation is Powdered, the too tiny filtering separation that is unfavorable for.
In the present embodiment; Said solid-liquid separator comprises liquid storage pool 110, be located at the crawler-tread mechanism 111 directly over the liquid storage pool 110 and be located at the PVA solid collection frame 112 under crawler-tread mechanism 111 ends; Crawler belt in the said crawler-tread mechanism 111 is provided with diameter less than PVA solid filter pore, said crawler-tread mechanism 111 be located at said low speed reaction vessel 114 discharge port under.Can make the simple in structure of solid-liquid separator, reduce cost, guarantee the respond well of solid-liquid separator simultaneously.
The described device working process of the foregoing description is following:
The desized wastewater that contains PVA through second pipeline 105 is thrown in the line mixer 103 by pump in the certain flow rate ratio with the coagulant solution that is stored in the container 101; Mixing solutions gets into placed in-line high speed reaction vessel 113 successively then; Get into low speed reaction vessel 114 again; The solidliquid mixture that generates is discharged from low speed reaction vessel 114 and is entered into solid-liquid separator; Solidliquid mixture is separated by the filter pore of crawler-tread mechanism 111, and solid gets into PVA solid collection frame 112, and raffinate is discharged to Sewage treatment systems after getting into water reservoir again.
The key problem in technology of the described device of the foregoing description is:
(1) placed in-line high speed reaction vessel is equipped with high speed shear stirrer 115 for 113 li, and the blade of high speed shear stirrer 115 produces non-eddy current shape and mixes when (rotating speed>1000rpm) operation at a high speed, and the PVA agglutination reaction can be accomplished in 30min.
(2) the PVA solid that generates under 113 li high speed shear of placed in-line high speed reaction vessel is Powdered; Cross tiny unfavorable filtering separation; Therefore get in the low speed reaction vessel 114 that stirs at a slow speed; Under the stirring at a slow speed of low-speed mixer 116, Powdered PVA solid is entangled with the bigger particulate state of formation mutually, gets into solid-liquid separator again and separates.
The above embodiment has only expressed embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. the removal method of PVA in the desized wastewater is characterized in that, may further comprise the steps:
The desized wastewater that contains PVA mixes with the agglutinant solution of being made up of borax, Sodium sulfate anhydrous.min(99);
Mixed desized wastewater and agglutinant solution get into the reaction of PVA agglutometer, generate PVA solid condensation prod;
The PVA solid condensation prod that generates and the solidliquid mixture of waste water are discharged in the PVA agglutometer, get into solid-liquid separator;
Through waste water after the solid-liquid separator separation and the single collection processing separately of PVA solid.
2. the removal method of PVA is characterized in that in the desized wastewater according to claim 1, and is further comprising the steps of:
The desized wastewater of the mixed PVA of containing reacts under high speed shear stirs with the agglutinant solution of being made up of borax, Sodium sulfate anhydrous.min(99), and stirring velocity is 300rpm-20000rpm.
3. the removal method of PVA is characterized in that in the desized wastewater according to claim 1 and 2, and is further comprising the steps of:
Mixed desized wastewater and agglutinant solution continue to get into the PVA agglutometer, and the time that in the PVA agglutometer, stops reaction is 3min-120min.
4. the removal method of PVA is characterized in that in the desized wastewater according to claim 3, and is further comprising the steps of:
The temperature of reaction of mixed desized wastewater and agglutinant solution is 0 ℃-100 ℃.
5. the removal device of PVA in the desized wastewater; It is characterized in that; It comprises container, solution mixer, PVA agglutometer and the solid-liquid separator that is used for splendid attire agglutinant solution; The discharge port of said container is connected with the opening for feed of said solution mixer through first pipeline, and the opening for feed of said solution mixer also is provided with second pipeline that is used to import desized wastewater, on said first pipeline and said second pipeline, is equipped with flow regulator; The discharge port of said solution mixer is connected with the opening for feed of said PVA agglutometer, and the discharge port of said PVA agglutometer is connected with the opening for feed of said solid-liquid separator.
6. the removal device of PVA in the desized wastewater according to claim 5; It is characterized in that; Said PVA agglutometer comprises reaction vessel, is located at the motor of interior stirrer of reaction vessel and driving stirrer; The opening for feed of said reaction vessel is connected with the discharge port of said solution mixer, and the discharge port of said reaction vessel is connected with the opening for feed of said solid-liquid separator.
7. the removal device of PVA in the desized wastewater according to claim 5; It is characterized in that; Said PVA agglutometer comprises placed in-line low speed reaction vessel and high speed reaction vessel, is located at the high speed shear stirrer in the high speed reaction vessel and is located at the low-speed mixer in the low speed reaction vessel; The opening for feed of said high speed reaction vessel is connected with the discharge port of said solution mixer, and the discharge port of said low speed reaction vessel is connected with the opening for feed of said solid-liquid separator.
8. the removal device of PVA is characterized in that in the desized wastewater according to claim 7, and said high speed reaction vessel comprises two to ten placed in-line successively high speed reaction vessels, is equipped with the high speed shear stirrer in each said high speed reaction vessel.
9. the removal device of PVA in the desized wastewater according to claim 5; It is characterized in that; Said solid-liquid separator comprises liquid storage pool, be located at the crawler-tread mechanism directly over the liquid storage pool and be located at the PVA solid collection frame under the crawler-tread mechanism end; Crawler belt in the said crawler-tread mechanism is provided with diameter less than PVA solid filter pore, said crawler-tread mechanism be located at said PVA agglutometer discharge port under.
10. according to the removal device of PVA in each described desized wastewater in the claim 5 to 9, it is characterized in that said solution mixer is pipeline high-shear emulsion machine or line mixer.
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| CN102887577A (en) * | 2012-09-25 | 2013-01-23 | 江苏红旗印染机械有限公司 | System for recycling PVA (Polyvinyl Alcohol) slurry from printing and dyeing wastewater and desizing wastewater |
| CN105174548A (en) * | 2015-09-25 | 2015-12-23 | 鲁泰纺织股份有限公司 | Method for treating PVA containing desizing waste water |
| CN105948196A (en) * | 2016-05-05 | 2016-09-21 | 杭州博天环保科技有限公司 | Water-soluble cloth dissolution wastewater combination equipment and pretreatment process |
| CN108409022A (en) * | 2018-05-16 | 2018-08-17 | 泊头市大华环保工程有限公司 | Desized wastewater processing method containing PVA and processing system |
| CN109597158A (en) * | 2017-10-02 | 2019-04-09 | 住友化学株式会社 | The manufacturing method of polyvinyl alcohol resin film |
| CN109591342A (en) * | 2017-10-02 | 2019-04-09 | 住友化学株式会社 | The manufacturing method of polarizing coating and the manufacturing device of polarizing coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102887577A (en) * | 2012-09-25 | 2013-01-23 | 江苏红旗印染机械有限公司 | System for recycling PVA (Polyvinyl Alcohol) slurry from printing and dyeing wastewater and desizing wastewater |
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| CN105948196A (en) * | 2016-05-05 | 2016-09-21 | 杭州博天环保科技有限公司 | Water-soluble cloth dissolution wastewater combination equipment and pretreatment process |
| CN109597158A (en) * | 2017-10-02 | 2019-04-09 | 住友化学株式会社 | The manufacturing method of polyvinyl alcohol resin film |
| CN109591342A (en) * | 2017-10-02 | 2019-04-09 | 住友化学株式会社 | The manufacturing method of polarizing coating and the manufacturing device of polarizing coating |
| JP2019066835A (en) * | 2017-10-02 | 2019-04-25 | 住友化学株式会社 | Method for manufacturing polarizing film and device for manufacturing polarizing film |
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| CN108409022A (en) * | 2018-05-16 | 2018-08-17 | 泊头市大华环保工程有限公司 | Desized wastewater processing method containing PVA and processing system |
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