CN1408944A - Process for treating waste water of paper-making - Google Patents
Process for treating waste water of paper-making Download PDFInfo
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- CN1408944A CN1408944A CN 01127502 CN01127502A CN1408944A CN 1408944 A CN1408944 A CN 1408944A CN 01127502 CN01127502 CN 01127502 CN 01127502 A CN01127502 A CN 01127502A CN 1408944 A CN1408944 A CN 1408944A
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- waste water
- flyash
- polyacrylamide
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Abstract
The papermaking waste water treating method includes adding proper amount of flyash with large specific surface area to the inlet of settling tank to adsorb partial of pollutant in waste water while adsorbing two kinds of adsorbing chemical with netting bridge to increase the specific weight of the adsorbing chemicals of fast deposition. The method of the present invention is suitable for treating imine papermaking black liquor and intermediate section water as well as alkali papermaking intermediate section water.
Description
Technical field: the invention belongs to a kind of processing method of sewage, especially relate to a kind of technological process for the treatment of papermaking method.
Background technology: along with industrial expansion, water for industrial use and discharged waste water are also increasing.The discharging of a large amount of waste water has not only been wasted limited water resource, but also has been brought severe contamination to environment, has destroyed the ecological balance of environment, and the life of returning vegeto-animal growth and people has simultaneously caused great harm.In order to protect environment, ensure people's life and healthy, sewage disposal has in recent years caused people's generally great attention, at different quality, adopt different scientific methods to be handled, turns harm into good, and turns waste into wealth.Paper waste is the bigger source of sewage of a kind of discharge capacity in the trade effluent, handles this type of waste water, and people have had the ripe scheme of a cover basically through for many years discussion, test, and more common have biochemical process, physical-chemical process, chemical method and a physics method.It is all undesirable that above-mentioned several method is used treatment effect separately, and several method is just more satisfactory in conjunction with effect.General common way is: remove SS relatively large in the waste water, COD with the flocculent precipitation in the physics method earlier
CrAnd part BOD
5After, remove with air supporting method or biochemical process again and remain dirt in the waste liquid.The flocculent precipitation in past generally adopts aluminum sulfate, ferrous sulfate, ferric trichloride etc. to make flocculating setting agent, it is bigger that aluminum sulfate is influenced by the pH value in the waste water, ferrous sulfate in processing procedure because of the oxidation variable color, cause the waste liquid color burn, ferric trichloride itself has brown, with its paper waste of handling color burn not only, and acidity increases, and the adopter is by subtracting.Adopt separately aluminium polychloride or polyacrylamide also can impel relevant deposition of dirt in the waste liquid, but because the molecular weight of aluminium polychloride own is little, strand is short, its formed network crane span structure and mesh is little, light specific gravity is so the subsidence velocity that adsorbs behind the dirt is slow; Although Molecular Weight for Polyacrylamide is big, molecular chain length, but the network crane span structure and the mesh of its formation are big, and the less dirt of volume is easily fallen by careless omission in the absorption sinking process, the long-pending proportion of its network bridge support body is also less relatively, so the subsidence velocity behind the absorption dirt is also slower.Above-mentioned two kinds of medicines are used, because the network crane span structure that aluminium polychloride forms is less, can be filled in the mesh of the network crane span structure that the polyacrylamide strand forms by mutual absorption, adsorption precipitation is made good use of than making separately, but its volume proportion is also little relatively for the network crane span structure after its combination, so the subsidence velocity behind the absorption dirt is still undesirable.
Summary of the invention: purpose of the present invention be exactly provide at the shortcoming that flocculating effect is poor, sinking speed is slow in the physics flocculence processing procedure in the above-mentioned sewage disposal scheme toward after adding an amount of flyash in the waste water after twice drug treating, making a kind of technological process for the treatment of papermaking method that dirt sinks fast in the waste water.
A kind of technological process for the treatment of papermaking method, the waste water that regulates pH value flows into first treatment pond, enter second treatment pond after under stirring, adding an amount of aluminium polychloride, under stirring, add waste water behind an amount of polyacrylamide again and be sent to sedimentation basin and handle, it is characterized in that: add an amount of flyash again in the waste water after twice drug treating.
According to above-described a kind of technological process for the treatment of papermaking method, the addition of aluminium polychloride is a 120-3000g/T waste water, and the addition of polyacrylamide is a 4-100g/T waste water, and its feature also is: the addition of flyash is a 240-6000g/T waste water.
The specific embodiment: because the raw material difference, production technology is also inequality, so solid suspension matter, reducing substances, oxidation material and pH value thereof in the paper waste are also inequality, and used medicine is subjected to that pH value influences bigger in the waste water in flocculent precipitation, so before processing, should calculate the pH value of waste water and the content of various solid impurities thereof, to determine the addition of various desired substances in the processing procedure.According to the pH value of waste water, take measures, adjust its pH value between 6-8; (be generally SS, COD according to different solid impurities in the waste water
CrAnd BOD
5) content, calculate the addition of used medicine (aluminium polychloride and polyacrylamide) and flyash.Generally speaking, the amount ratio of three kinds of materials is: polyacrylamide: aluminium polychloride: flyash=1: 30: 60, promptly the consumption of aluminium polychloride and flyash is 30 times and 60 times of polyacrylamide.Flyash joins in the waste water in the porch that flows into sedimentation basin through the waste water after twice drug treating, and two kinds of chemicalss (aluminium polychloride and polyacrylamide) water fully dissolves the back and sends into separately treatment pond with pump respectively through flowmeter.Polyacrylamide promptly is that flocculant, lattice reagent also are flocculation aids, but solubility is low in the neutral water when low temperature, and the strand that curls in dissolving back can not fully stretch, and causes its flocculation, network, effect of flocculant poor.For improving flocculation, network, the effect of flocculant of polyacrylamide in wastewater treatment, polyacrylamide should be made alkalization hydrolysis and handle.In the technological process for the treatment of papermaking process, the dissolving of chemicals is all carried out in medicine dissolving tank, the medicine dissolving tank of medicine of the same race is generally two, stirring and dissolving, alternately switch and use, the medicine dissolving tank that is aluminium polychloride is two, and the medicine dissolving tank of polyacrylamide also is two (its alkalization hydrolysis also carries out in this pond).Medicine dissolves (or alkalization hydrolysis) back in medicine dissolving tank standby, generally speaking, and paper waste per ton aluminium polychloride 120-3000g, and the polyacrylamide consumption is at 4-100g.It is standby that flyash places the bottom to have in the device of Electric Machine Control thumb wheel rotating speed.Method of wastewater treatment: pH value be the paper waste of 6-8 after measuring pump enters first treatment pond from first treatment pond bottom, under stirring, the hydrolyzate of aluminium polychloride is sent into first treatment pond through flowmeter with pump bottom first treatment pond; Waste water in first treatment pond overflows from Qi Chi top from second treatment pond bottom and enters into second treatment pond, and the alkalization hydrolysis liquid of polyacrylamide is sent into second treatment pond from second treatment pond bottom through flowmeter with pump under stirring.Waste water in second treatment pond overflows from Qi Chi top and flows into the sedimentation basin, establish the device that dress flyash, bottom in have thumb wheel at the waterwater entrance place of sedimentation basin, under driven by motor, thumb wheel rotates, flyash falls into the waste water that twice soup handled from the thumb wheel tooth in the thumb wheel rotation process, the speed decision that the addition of flyash is rotated by thumb wheel, general waste water consumption per ton is at 240-6000g.The device that adds flyash can be arranged on the waterwater entrance place of sedimentation basin, also can be located at the top of sedimentation basin, can also be arranged on certain in the mobile way of waste water.Because paper waste is successively to produce in actual production, so wastewater treatment also is a dynamic process continuously.
Polyacrylamide behind aluminium polychloride and the alkalization hydrolysis forms its network bridge shelf structure separately in the aqueous solution, because the strand of aluminium polychloride is short, so the network crane span structure and the mesh thereof that form in water are little; And the molecular chain length of the polyacrylamide behind the alkalization hydrolysis, its strand is by being crimped onto abundant stretching, extension, so network crane span structure that forms in water and mesh thereof are also bigger after basification.After the alkalization hydrolysis liquid of polyacrylamide joins in the waste water that adds aluminium polychloride, the network crane span structure of the aluminium polychloride that mesh is less is filled in the mesh of network crane span structure of the polyacrylamide behind alkalization hydrolysis, form the bigger new network bridge support body of density, thereby strengthened the ability of catching dirt in the waste water.Flyash is the powder solid particle that contains metal oxide or metal simple-substance and some complex salt, specific area is big, high adsorption capacity, water insoluble, itself proportion is greater than aluminium polychloride and polyacrylamide, join the high density that in the sinking process, forms in the waste water after twice drug treating with above-mentioned two kinds of medicines when flyash, absorption is arranged, when the network bridge bridge joint of seizure dirt ability touches, flyash and network crane span structure have also absorbed the partial impurities in the waste water when adsorbing mutually, increased the proportion of network bridge support body in water, not only improved the clearance of impurity in the waste water, the speed that the network bridge support body that also having accelerated to inhale has dirt sinks in water.
Below be the result of the paper waste of different material with the said method processing:
The treatment effect of generated by making paper with wheat straws (alkaline process) waste water (stage casing)
| ????SS(mg/L) | ????COD cr(mg/L) | ????BOD 5(mg/L) | |
| Before the processing | ????1500-2500 | ????2000-3000 | ????1500-2000 |
| After the processing | ????170-290 | ????630-950 | ????620-830 |
| Clearance (%) | ????88.5 | ????68.5 | ????58.7 |
Various major impurities are in down in limited time in waste water, and promptly SS is 1500mg/L, COD
CrBe 2000mg/L, BOD
5During for 1500mg/L, the consumption of polyacrylamide (alkalization hydrolysis) is a 15g/T waste water, and along with the variation of impurity content in the waste water, its consumption also changes with ratio, and the consumption of aluminium polychloride and flyash is respectively 30 times and 60 times of polyacrylamide consumption.
Waste paper making wastewater (integrated water) treatment effect
| ????SS(mg/L) | ????COD cr(mg/L) | ????BOD 5(mg/L) | |
| Before the processing | ????800-1500 | ????1000-1500 | ????800-1200 |
| After the processing | ????80-150 | ????300-450 | ????340-400 |
| Clearance (%) | ????90.0 | ????70.0 | ????58.0 |
Various major impurities are in down in limited time in waste water, and promptly SS is 800mg/L, COD
CrBe 1000mg/L, BOD
5During for 800mg/L, the consumption of polyacrylamide (alkalization hydrolysis) is a 10g/T waste water, and along with its consumption of variation of major impurity content in the waste water also changes with ratio, the consumption of aluminium polychloride and flyash is respectively 30 times and 60 times of polyacrylamide consumption.
With the bamboo is raw material papermaking (imines method) waste water (black liquor) treatment effect
| ????SS(mg/L) | ????COD cr(mg/L) | ????BOD 5(mg/L) | |
| Before the processing | ????1500-2500 | ????14000-15000 | ????2000-3000 |
| After the processing | ????130-220 | ????4450-4470 | ????850-1230 |
| Clearance (%) | ????91.0 | ????68.0 | ????58.0 |
Various major impurities are in down in limited time in waste water, and promptly SS is 1500mg/L, COD
CrBe 14000mg/L, BOD
5During for 2000mg/L, the consumption of polyacrylamide (alkalization hydrolysis) is a 60g/T waste water, and along with its consumption of variation of major impurity content in the waste water also changes with ratio, the consumption of aluminium polychloride and flyash is respectively 30 times and 60 times of polyacrylamide consumption.
Embodiment: with waste paper making wastewater (integrated water) is example
| ????SS(mg/L) | ????COD cr(mg/L) | ????BOD 5(mg/L) | |
| Before the processing | ????1126 | ????1407 | ????923 |
| After the processing | ????110 | ????429 | ????389 |
| Clearance (%) | ????90.2 | ????69.5 | ????57.8 |
(the water proportion of solvent polymerization aluminium chloride is: water: aluminium polychloride=30: 1) to add the aqueous solution 9300ml that contains the 300g aluminium polychloride by waste water per ton in first treatment pond, the adding of second treatment pond adds the alkalization hydrolysis liquid 20010ml that contains the 10g polypropylene amine by waste water per ton, and (weight ratio of alkalization hydrolysis polyacrylamide is: water: polyacrylamide: NaOH=2000: 1: 0.2), add flyash 600g by the device that flyash is housed by waste water per ton at the waterwater entrance place of settling tank.
Because the processing procedure of waste water is continuously, sinking speed is difficult for measuring, survey by graduated cylinder, adding flyash with the waste water once twice drug treating makes a world of difference with the subsidence velocity that does not add the cotton-shaped dirt of flyash: indicator graduation lines is in two identical graduated cylinders of 1000ml, add the described sewage of the foregoing description crossed through twice drug treating simultaneously to 1000ml, in one of them graduated cylinder, add flyash 0.6g immediately, simultaneously two interior sewage are carried out picking up counting after the agitation as appropriate with splash bar, when graduated cylinder 50ml graduation mark is reduced in the upper end of the cotton-shaped dirt that sinks, what do not add flyash is 2 minutes, and what add flyash only is 0.5 minute, be not difficult to find out that thus the speed of deposition of dirt has shortened 3/4 behind the adding flyash.
A kind of technological process for the treatment of papermaking method of the present invention is applicable to that the middle section water in the black liquor of imines papermaking and middle section water, the alkali paper-making and the integrated water of regenerated papermaking handle, and simple, effect is remarkable.
Claims (2)
1, a kind of technological process for the treatment of papermaking method, the waste water that regulates pH value flows into first treatment pond, enter second treatment pond after under stirring, adding an amount of aluminium polychloride, under stirring, add waste water behind an amount of polyacrylamide again and be sent to sedimentation basin and handle, it is characterized in that: add an amount of flyash again in the waste water after twice drug treating.
2, a kind of technological process for the treatment of papermaking method according to claim 1, the addition of aluminium polychloride is a 120-3000g/T waste water, the addition of polyacrylamide is a 4-100g/T waste water, and its feature also is: the addition of flyash is a 240-6000g/T waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127502 CN1408944A (en) | 2001-09-23 | 2001-09-23 | Process for treating waste water of paper-making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127502 CN1408944A (en) | 2001-09-23 | 2001-09-23 | Process for treating waste water of paper-making |
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| CN1408944A true CN1408944A (en) | 2003-04-09 |
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| CN 01127502 Pending CN1408944A (en) | 2001-09-23 | 2001-09-23 | Process for treating waste water of paper-making |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890335A (en) * | 2010-07-20 | 2010-11-24 | 中国科学院水生生物研究所 | Adsorbent for removing earthy and musty odor from water and preparation method |
| CN102351368A (en) * | 2011-07-01 | 2012-02-15 | 石家庄开发区德赛化工有限公司 | Loading flocculation pretreatment method of antibiotic fermentation wastewater |
| CN102992553A (en) * | 2012-12-31 | 2013-03-27 | 黄河三角洲京博化工研究院有限公司 | Method for comprehensively treating and utilizing dissolving pulp black liquor |
| CN104370412A (en) * | 2014-10-24 | 2015-02-25 | 无锡伊佩克科技有限公司 | Papermaking wastewater treatment system and method |
| CN104402138A (en) * | 2014-10-24 | 2015-03-11 | 无锡伊佩克科技有限公司 | Papermaking wastewater treatment method |
| CN109761330A (en) * | 2019-03-21 | 2019-05-17 | 辽宁大学 | A kind of PAC-PAM composite flocculation agent and preparation method thereof and reducing the application in sanitary sewage COD |
| CN116573692A (en) * | 2023-04-17 | 2023-08-11 | 淮安恒发纸业有限公司 | Packaging paper production wastewater recycling device and technology |
-
2001
- 2001-09-23 CN CN 01127502 patent/CN1408944A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890335A (en) * | 2010-07-20 | 2010-11-24 | 中国科学院水生生物研究所 | Adsorbent for removing earthy and musty odor from water and preparation method |
| CN102351368A (en) * | 2011-07-01 | 2012-02-15 | 石家庄开发区德赛化工有限公司 | Loading flocculation pretreatment method of antibiotic fermentation wastewater |
| CN102351368B (en) * | 2011-07-01 | 2013-06-12 | 石家庄开发区德赛化工有限公司 | Loading flocculation pretreatment method of antibiotic fermentation wastewater |
| CN102992553A (en) * | 2012-12-31 | 2013-03-27 | 黄河三角洲京博化工研究院有限公司 | Method for comprehensively treating and utilizing dissolving pulp black liquor |
| CN104370412A (en) * | 2014-10-24 | 2015-02-25 | 无锡伊佩克科技有限公司 | Papermaking wastewater treatment system and method |
| CN104402138A (en) * | 2014-10-24 | 2015-03-11 | 无锡伊佩克科技有限公司 | Papermaking wastewater treatment method |
| CN104370412B (en) * | 2014-10-24 | 2016-06-08 | 安徽景丰纸业有限公司 | A kind of papermaking wastewater treatment system and method |
| CN109761330A (en) * | 2019-03-21 | 2019-05-17 | 辽宁大学 | A kind of PAC-PAM composite flocculation agent and preparation method thereof and reducing the application in sanitary sewage COD |
| CN116573692A (en) * | 2023-04-17 | 2023-08-11 | 淮安恒发纸业有限公司 | Packaging paper production wastewater recycling device and technology |
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