CN1792858A - Process for treating acidic waste water of viscose fibre industry - Google Patents
Process for treating acidic waste water of viscose fibre industry Download PDFInfo
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- CN1792858A CN1792858A CN 200510022481 CN200510022481A CN1792858A CN 1792858 A CN1792858 A CN 1792858A CN 200510022481 CN200510022481 CN 200510022481 CN 200510022481 A CN200510022481 A CN 200510022481A CN 1792858 A CN1792858 A CN 1792858A
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- waste water
- sulfide
- lime
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Abstract
A process for treating the acidic sewage generated in viscose fiber industry includes such steps as adding lime milk for neutralizing sewage, passing the sewage through screen for removing big particles, aerating for blowing out part of sulfide from sewage, adding Zn removing agent and water cleaner, depositing sulfide, Zn and suspended solid, adding lime milk to regulate pH=7.6-8.8, and depositing for removing sulfide, Zn(OH)2 and suspended substance from water.
Description
Technical field
The present invention relates to the industrial acidic wastewater purifying treatment method, relate in particular to the treatment process of acidic waste water of viscose fibre industry.
Background technology
The waste water of viscose Fibre factory mostly adopts tertiary treatment, i.e. one-level precipitation process, and secondary biochemical treatment is passed through such as activated carbon adsorption again, ion-exchange, electrodialytic method processing etc., the wastewater treatment investment is huge, and processing costs is also extremely expensive.U.S. health Mu Taikesi company at first adopts the calcium hydroxide neutralization precipitation to go out zinc hydroxide, uses sulfuric acid reclaim(ed) sulfuric acid zinc again, but the processing condition harshness is not easy to operate.
At present, the treatment stage that domestic textile enterprise acid waste water resting on one-level substantially, the processing technological flow of usefulness is usually: grid → pump well → homogeneous pond → neutralization tank → settling tank → discharging.Promptly adopt grid to tackle most of waste silk and blob of viscose, at homogeneous pond aeration stripping partial vulcanization thing, neutralization tank adds lime and regulates pH value, removes sulfide precipitation, Zn (OH) at settling tank
2Precipitation and suspended substance, effluent quality still fails to reach discharging standards comprehensively, indexs such as COD, BOD, sulfide, zinc ion content wherein, most of factory exceeds standard to some extent.
The core that acidic waste water of viscose fibre industry is handled is the processing of zinc-containing water, and this is a difficult problem in production of chemical fibre field.For solving this technical barrier, more domestic manufacturing enterprises have carried out continuous exploration and tackling key problem for solving this technical barrier.Dandong chemical fibre industry company is the large-lot producer that China produces man-made fiber, it also is the producer that first hand adopts materialization-biochemical bi-level treatment technology in the national viscose fiber manufacturer, the main technique flow process that is adopted is: aeration stripping removes in sulfide → milk of lime and dezincification → activated sludge process is removed organism, treatment effect is more stable, Zn
2+Clearance more than 88%, Zn in the water outlet
2+≤ 4mg/L reaches the GB8978-1996 secondary discharge standard, and still, along with the development of society and the strictness of national environmental protection policy, secondary standard can not be satisfied the demand, has begun to carry out primary standard now.Hangzhou blue peacock FCFC is through for many years research of technique, and at the waste water treatment process that adopt Physiochemical and biochemical to combine for the end of the year 1997, treatment effect is unsatisfactory.2000, Tianyuan chemical fibre factory in Nan Ping added the novel process of introducing shallow air-floatation and the filtering wastewater from viscose fiber producing improvement of iron carbon on the biochemical processing process basis in the materialization of routine.Treatment effect takes a turn for the better to some extent, but technology becomes complicated, inconvenient operation, and running cost increases.
Summary of the invention
Technical problem to be solved by this invention provides a kind of process for treating acidic waste water of viscose fibre industry, this method not only can be removed zinc, sulfide and the solid suspension content in the waste water effectively, make it to reach the first discharge standard of GB8978-1996, and purifying treatment running cost is lower.
The technical solution adopted for the present invention to solve the technical problems is: process for treating acidic waste water of viscose fibre industry of the present invention comprises the steps: (1) input milk of lime, to neutralizing in the water body; (2) make water body pass through grid, remove the bigger suspended substance of particle; (3) part sulfide in the aeration stripping water body; (4) add dezincification agent and water purification agent, sulfide, zinc and suspended solid are carried out precipitate and separate; (5) throw in milk of lime, water PH value is adjusted to 7.6～8.8; (6) remove sulfide in water, Zn (OH) by precipitation
2And suspended substance.
The invention has the beneficial effects as follows that technical measures are with strong points, minimum at wastewater biodegradability, COD is up to standard and sulfide, total zinc and the reluctant characteristics of suspended solid adopt physico-chemical process that waste water is carried out comprehensive treating process; Method with dezincification agent and co-precipitation, sulfide, Zn and suspended solid are carried out precipitate and separate, can remove the complex state Zn in the water body effectively, can guarantee that zinc, sulfide and suspended solid in the acid waste water water outlet reach the first discharge standard of GB8978-1996. Running cost is low, and newly-increased sludge quantity is little, and moisture percentage in sewage sludge is low, easily press filtration; Do not have secondary pollution: the with medicament that makes is nontoxic material, and can precipitate and separate, does not have secondary pollution.
Description of drawings
This specification sheets comprises following two width of cloth accompanying drawings:
Fig. 1 is the process flow diagram of process for treating acidic waste water of viscose fibre industry of the present invention;
Fig. 2 is a milk of lime dosing system synoptic diagram in the process for treating acidic waste water of viscose fibre industry of the present invention.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
With reference to accompanying drawing 1, waste water through between pump well, grid, one-level promotes pump well, one-level lift pump room, homogeneous pond, two-stage hoisting pump house, neutralization tank and discharges to settling tank.Process for treating acidic waste water of viscose fibre industry of the present invention comprises the steps:
(1) throws in milk of lime, water body is neutralized.The concentration of milk of lime in water body is 2%～5%.Adopt in the milk of lime and in the water body and contain sulfuric acid, milk of lime and sulfate radical generate calcium sulfate precipitation, can precipitate to remove a large amount of suspended substances in the water.
(2) make water body pass through grid, remove the bigger suspended substance of particle.Promptly adopt grid to tackle most of waste silk and blob of viscose, and guarantee the normal operation of sewage pump.
(3) part sulfide in the aeration stripping water body.
Promptly in the homogeneous pond by aerator with water body in part sulfide stripping, the effect in homogeneous pond mainly is a water quality and quantity of regulating sewage, makes its effluent quality water yield equilibrium.Homogeneous is laid boring aeration pipe in the pond, and air feed intensity is 3m
3/ m
2.h, with the deposition of effectively avoiding impurity and the degree of mixing that improves sewage, guarantee the steady safe operation of subsequent disposal facility.Generally speaking, the residence time is about 2 hours in the water body homogeneous pond.
(4) add dezincification agent and water purification agent, sulfide, zinc and suspended solid are carried out precipitate and separate.
It is the heavy metal precipitator of ZJSC that described dezincification agent can be adopted the trade mark of being produced by Genie et Environnement of Zhongshan University, and its concentration in water body is 0.1～10ppm.Described scavenging agent can adopt FeSO
47H
2O, its concentration in water body is 100～1000ppm.
(5) throw in milk of lime, water PH value is adjusted to 7.6～8.8.Carry out in neutralization tank as this step 1, lime milk concentration is: 2%～5%, during use by pump delivery to each filling point.General lime dosing system is " adding while preparing " mode, is unfavorable for the control of the pH value of neutralization tank.Can adopt lime dosing system as shown in Figure 2, promptly increase a dosing chamber.Two milk of limes add in the pond, and the using and the reserved keep the relatively stable of lime concentration, help the control of neutralization tank pH value.The milk of lime for preparing is at first transferred to material storage container with pump, and the milk of lime in the reinforced pond to filling point, when treating that milk of lime in the reinforced pond is used to half volume, switches the milk of lime of enabling in the material storage container by valve by pump delivery, and material storage container becomes reinforced pond; And original reinforced pond begins to be fed to full pond, and reinforced pond becomes material storage container.
(6) remove sulfide in water, Zn (OH) by precipitation
2And suspended substance, this step is carried out in settling tank.The effect of settling tank is fiber, the Zn (OH) that in the milk of lime and back is produced
2Precipitate with solidity things such as sulfide, thereby waste water is purified.Settling tank adopts Zhou Jinzhou to go out the formula radical sedimentation basin, and its surface load is 1m
3/ m
2.h.
Waste water gets final product qualified discharge after above-mentioned steps is handled generally speaking.Except that last, also can increase the filter tank and handle the back safeguards as materialization, for example when occur producing fluctuation greatly, when settling tank seriously turns over mud, suspended substance in the water body can be further removed in the filter tank, guarantee qualified discharge, the water in filter tank also can be back to and join milk of lime, flushing ground, greening etc. in addition, realizes recycling economy.
The applicant is used in process for treating acidic waste water of viscose fibre industry of the present invention in the actual production, through nearly 1 year trial run, the detected result proof can guarantee that zinc, sulfide and suspended solid index in the acid waste water water outlet reach the first discharge standard of GB8978-1996.
Embodiment:
Main technologic parameters among the embodiment 1～3, and wastewater treatment detected result such as following table:
| Processing condition | Parameter | Index | Water inlet detects data | Water outlet detects data | ||
| Embodiment 1 | Lime milk concentration | 5％ | COD(mg/l) | 500 | ＜100 | |
| PH value | 8.6 | (pH value) | 2 | 6～9 | ||
| The dezincification agent | 10ppm | S(mg/l) | 20 | 0.22 | ||
| Water purification agent | 1000 ppm | Zn(mg/l) | 80 | 0.26 | ||
| SS(mg/l) | 300 | 44 | ||||
| Embodiment 2 | Lime milk concentration | 3％ | COD(mg/l) | 173 | 90 | |
| PH value | 8 | (pH value) | 2.1 | 8.3 | ||
| The dezincification agent | 0.4ppm | S(mg/l) | 7.1 | 0.44 | ||
| Water purification agent | 180ppm | Zn(mg/l) | 59.6 | 1.71 | ||
| SS(mg/l) | 162 | 42 | ||||
| Embodiment 3 | Lime milk concentration | 4％ | COD(mg/l) | 192.48 | 64.16 | |
| PH value | 8.4 | (pH value) | 1.86 | 7.64 | ||
| The dezincification agent | 0.6ppm | S(mg/l) | 8.51 | 0.42 | ||
| Water purification agent | 220ppm | Zn(mg/l) | 87.55 | 1.04 | ||
| SS(mg/l) | 171 | 32 |
In last table, detecting the water quality analysis index that relates to has pH, COD, SS, colourity, sulfide and total Zn etc., and the standard that the analytical procedure that is adopted is followed sees the following form:
| Water-quality guideline | Analytical procedure | Standard |
| pH | Glass electrode method | GB/T 69210 |
| COD | Potassium dichromate process | GB/T 11914 |
| SS | Weighting method | GB/T 11901 |
| Colourity | The extension rate method | GB/T 11903 |
| Sulfide | The P-aminodimethylaniline colorimetry | GB/T 8538-1995 |
| Total Zn | Plasma atomic emission spectrometry | GB/T 10725-1989 |
Claims (5)
1, process for treating acidic waste water of viscose fibre industry comprises the steps:
(1) throws in milk of lime, water body is neutralized;
(2) make water body pass through grid, remove the bigger suspended substance of particle;
(3) part sulfide in the aeration stripping water body in the homogeneous pond;
(4) add dezincification agent and water purification agent, sulfide, zinc and suspended solid are carried out precipitate and separate;
(5) in neutralization tank, throw in milk of lime, water PH value is adjusted to 7.6～8.8;
(6) in settling tank, remove sulfide in water, Zn (OH) by precipitation
2And suspended substance.
2, process for treating acidic waste water of viscose fibre industry according to claim 1 is characterized in that: in described step (2) and the step (5), the concentration of milk of lime is 2%～5%.
3, process for treating acidic waste water of viscose fibre industry according to claim 1 is characterized in that: that the water purification agent in the described step (4) adopts is FeSO
47H
2O, its concentration in water body is 100～1000ppm.
4, process for treating acidic waste water of viscose fibre industry according to claim 1 is characterized in that: what the dezincification agent in the described step (4) was adopted is heavy metal precipitator, and its concentration in water body is 0.1～10ppm.
5, process for treating acidic waste water of viscose fibre industry according to claim 1 is characterized in that: after the described step (6), adopt the filter tank that the suspended substance water body that exceeds standard is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100224817A CN100494087C (en) | 2005-12-30 | 2005-12-30 | Process for treating acidic waste water of viscose fibre industry |
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|---|---|---|---|
| CNB2005100224817A CN100494087C (en) | 2005-12-30 | 2005-12-30 | Process for treating acidic waste water of viscose fibre industry |
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|---|---|
| CN1792858A true CN1792858A (en) | 2006-06-28 |
| CN100494087C CN100494087C (en) | 2009-06-03 |
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115280A (en) * | 2011-01-14 | 2011-07-06 | 北京中科百旺环保科技有限公司 | Treatment method for removing heavy metals in chelating resin tower wastewater during brine refining |
| CN104086011A (en) * | 2014-07-07 | 2014-10-08 | 成都丽雅纤维股份有限公司 | Zero discharge process suitable for waste water of viscose fiber industrial acid station |
| CN104445447A (en) * | 2014-10-20 | 2015-03-25 | 宜宾丝丽雅股份有限公司 | Viscose staple fiber acid sewage treatment plant |
| CN106186033A (en) * | 2016-09-13 | 2016-12-07 | 成都创慧科达科技有限公司 | A kind of barium hydrogen phosphate waste disposal system |
| CN108017196A (en) * | 2017-12-14 | 2018-05-11 | 山鹰国际控股股份公司 | A kind of wastewater deep treatment process of acid out oxidizing, flocculating precipitation |
| CN108751328A (en) * | 2018-06-19 | 2018-11-06 | 唐山三友远达纤维有限公司 | A kind of deodorizing method of acid water in viscose rayon industry |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3243658A1 (en) * | 1982-11-25 | 1984-05-30 | Forschungsinstitut Berghof GmbH, 7400 Tübingen | Process for treating alkaline-reacting process waters and waste waters |
| DD277261A1 (en) * | 1988-11-25 | 1990-03-28 | Akad Wissenschaften Ddr | METHOD FOR REMOVING MODIFICATORS FROM WASTEWATERS |
| CN1403391A (en) * | 2002-10-16 | 2003-03-19 | 张兴富 | Sewage treating process |
| CN1583608A (en) * | 2004-06-15 | 2005-02-23 | 山东海龙股份有限公司 | Comprehensive treatment of cotton-dreg black liquid and waste water from production of viscose fiber |
-
2005
- 2005-12-30 CN CNB2005100224817A patent/CN100494087C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115280A (en) * | 2011-01-14 | 2011-07-06 | 北京中科百旺环保科技有限公司 | Treatment method for removing heavy metals in chelating resin tower wastewater during brine refining |
| CN104086011A (en) * | 2014-07-07 | 2014-10-08 | 成都丽雅纤维股份有限公司 | Zero discharge process suitable for waste water of viscose fiber industrial acid station |
| CN104086011B (en) * | 2014-07-07 | 2016-02-10 | 成都丽雅纤维股份有限公司 | Be applicable to the technique of zero discharge of viscose fibre industry acid station waste water |
| CN104445447A (en) * | 2014-10-20 | 2015-03-25 | 宜宾丝丽雅股份有限公司 | Viscose staple fiber acid sewage treatment plant |
| CN104445447B (en) * | 2014-10-20 | 2016-08-24 | 宜宾丝丽雅股份有限公司 | Viscose staple fiber acid sewage treatment plant |
| CN106186033A (en) * | 2016-09-13 | 2016-12-07 | 成都创慧科达科技有限公司 | A kind of barium hydrogen phosphate waste disposal system |
| CN106186033B (en) * | 2016-09-13 | 2017-10-27 | 成都创慧科达科技有限公司 | A kind of barium hydrogen phosphate waste disposal system |
| CN108017196A (en) * | 2017-12-14 | 2018-05-11 | 山鹰国际控股股份公司 | A kind of wastewater deep treatment process of acid out oxidizing, flocculating precipitation |
| CN108751328A (en) * | 2018-06-19 | 2018-11-06 | 唐山三友远达纤维有限公司 | A kind of deodorizing method of acid water in viscose rayon industry |
| CN108751328B (en) * | 2018-06-19 | 2021-07-20 | 唐山三友远达纤维有限公司 | Deodorization method for acidic water in viscose fiber industry |
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| Publication number | Publication date |
|---|---|
| CN100494087C (en) | 2009-06-03 |
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Granted publication date: 20090603 Termination date: 20191230 |