CN1880238A - Air purification cooling waste water treatment method for viscose glue fiber workshop - Google Patents

Air purification cooling waste water treatment method for viscose glue fiber workshop Download PDF

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Publication number
CN1880238A
CN1880238A CN 200510050125 CN200510050125A CN1880238A CN 1880238 A CN1880238 A CN 1880238A CN 200510050125 CN200510050125 CN 200510050125 CN 200510050125 A CN200510050125 A CN 200510050125A CN 1880238 A CN1880238 A CN 1880238A
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waste water
air purification
water
treatment
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CN 200510050125
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Chinese (zh)
Inventor
宋德政
谭永文
卢光荣
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Hangzhou Water Treatment Technology Development Center National Bureau Of O
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Hangzhou Water Treatment Technology Development Center National Bureau Of O
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Priority to CN 200510050125 priority Critical patent/CN1880238A/en
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Abstract

The invention discloses a treatment process of air purification and wastewater cooling in cellulose viscose production department including: 1) biocidal treatment of wastewater, 2) the treatment of flocculation, 3) filtration in a plurality of filters, 4) addition of reducing agent, 5) addition of acid, 6) addition of antisludging agent, 7) precise filtration, 8) reverse osmosis treatment, 9) chemical scrubbing, 10) deaerated treatment, 11) reducing acidity by adding alkali to reach index demand of water recycle with the PH value being 7-8. The invention is used for treatment of air purification and wastewater cooling in cellulose viscose production department, and reduces suspended matter effectively to ensure the stable operation of counter-osmosis device and improve the quality of process recycle water, as the result that the process includes disinfection, flocculation, and through pretreatment and backwash of multiple-media filter and precise filter, that ensure the improvement of the quality of cellulose viscose products.

Description

The treatment process of viscose fiber production plant air purification cooling waste water
Technical field
The invention belongs to Industrial Wastewater Treatment and reuse.Specifically a kind of reuse technology that utilizes reverse osmosis membrane Technology (comprising device) to handle the air purification cooling waste water of artificial viscose fiber spinning workshop.
Background technology
By domestic existing production viscose fiber situation, one ton of silk of every production, the cooling-water consumption of spinning workshop purifying air is 80 tons, produces about 1,000,000 tons of viscose fiber per year, and the water resources consumption is very huge.This cooling waste water one as giving the floor a flush, or be used for the occasion of the low-quality water of back flushing resin softening agent class, carry out biochemical treatment, discharging at last.
Along with the application of embrane method wastewater processing technology, the applicant has successfully realized the sea-tangle processing waste water is extracted the useful practice of N.F,USP MANNITOL.And the experimental study that acid waste water carried out reclaiming chemical feedstocks and pure water is bathed in two in the viscose fiber production with electrodialytic method, and also obtained positively effect, but required the production reuse and guarantee the high-quality product of output, then this water quality treatment still has distance.And adopt the reverse osmosis technology treatment process to be expected to reach service requirements, handle viscose fiber production plant air cooling waste water with reverse osmosis membrane technology, and last one drip washing reuse do not see have document openly as yet as viscose fiber.
Summary of the invention
In order to overcome the deficiency of original technology, put forth effort to improve the quality and the reclamation rate of backwater, reduce production costs.The present invention has successfully adopted the composite technology of reverse osmosis and Treatment of Industrial Water.
Principle of the present invention is based on processing arrangement and the rational Application of reverse osmosis membrane in water treatment procedure.
The treatment process of viscose fiber production plant air purification cooling waste water of the present invention is characterized in that it comprises following processing step:
1), waste water sterilising treatment
In pretreated waste water, add 1~5 oxygenant that restrains by waste water per ton, convert into earlier water liquid, quantitatively drop into pump again and stir sterilization in the pipeline;
2), flocculation treatment
And, convert into earlier the aqueous solution with the flocculation agent consumption that waste water adding 0.5~2 per ton restrains, and quantitatively drop in the pipeline with pump again, through mixed flocculation, make suspended particulates flocculate into large-size, so that filtering with colloidalmaterial;
3), more medium filter filters
Waste water through sterilization and flocculation treatment enters more medium filter, and the filtering suspended substance is used water pollution index≤4;
4), add reductive agent
For protecting reverse osmosis membrane not to be subjected to the corrosion of chlorine residue, in waste water per ton, add 0.5~1.0 gram reductive agent, make chlorine residue≤0.1mg/L, earlier reductive agent is converted into the aqueous solution, quantitatively add pipeline with pump again;
5), add acid
In order to reduce the consumption of Scale inhibitors, acid is quantitatively added pipeline with pump, make the pH value of waste water be reduced to 6~7;
6), add Scale inhibitors
In order to reduce impurity foulings on the reverse osmosis face such as vitriol, carbonate, silicon-dioxide, iron, in waste water per ton, add 3~6 gram Scale inhibitorss, Scale inhibitors is converted into earlier the aqueous solution, quantitatively adds pipeline with pump again;
7), secondary filter
Enter the secondary filter device and carry out secondary filter, the particulate that filtering 5 μ m are above;
8), reverse-osmosis treated
With pressure pump above-mentioned pretreated waste water is injected reverse osmosis unit, remove impurity and salinity, obtain pure water;
9), matting
The preparation scavenging solution quantitatively injected reverse osmosis unit timing wash cycles reverse osmosis membrane 2~4 hours with pump;
10), the degassing is handled
The pure water that reverse osmosis unit is obtained is transported in the degassing tower, sends into uncontaminated air with gas blower from the bottom, and the carbonic acid gas in the water is removed;
11), add alkali
Detect acidity, when the acidity of water after the degassing was higher, by adding the alkali neutralization, reducing acidity, making it pH value was 7~8, to satisfy water reuse index request.
In the above-mentioned technology of the present invention:
Disinfectant in the processing step 1 is liquid chlorine, dioxide peroxide, clorox, hydrogen peroxide or ozone.
Flocculation agent in the processing step 2 is ST, PAT or MPT100.
Reductive agent in the processing step 4 is a sodium bisulfite.
Acid in the processing step 5 is hydrochloric acid or sulfuric acid.
Scale inhibitors in the processing step 6 is XM-310, MDC220 or PT198.
Chemical in the processing step 9 comprises acid, alkali, disodium ethylene diamine tetraacetate, sodium lauryl sulphate, sodium bisulfite.
Alkali in the processing step 11 is sodium hydroxide.
The present invention is the treatment process at viscose fiber production plant air purification cooling waste water, owing in technology, adopted sterilization, flocculation, add the pre-treatment and the back flushing of accurate filter again through more medium filter, effectively reduce suspended substance, guarantee the steady running of reverse osmosis unit, the quality of the reuse water of producing significantly improves, and provides guarantee for the viscose fiber product improves quality.
Operational path is reasonable, and is stable.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is at two of the process flow sheet of different waste water raw water qualities.
Fig. 3 is at three of the process flow sheet of different waste water raw water qualities.
Embodiment
Process flow sheet below in conjunction with embodiment is illustrated.
Embodiment 1: set up 12000 tons of day processing waste water by process flow sheet shown in Figure 1.
Its process unit is:
1), waste water sterilising treatment
Preprocessing process moves continuously, adds the 3 oxygenant dioxide peroxide that restrain by waste water per ton, converts into earlier water liquid, in the quantitative mode flow in pipes of carrying of pump, and stirs sterilization, and the process section treatment time was generally 10~30 minutes;
2), flocculation filtration is handled
Consumption with waste water 0.8 gram per ton adds flocculation agent ST, converts into earlier the aqueous solution, quantitatively drops in the pipeline with pump again, and process mixed flocculation 5~10 minutes makes suspended particulates flocculate into large-size with colloidalmaterial;
3), more medium filter filters
To enter more medium filter through the waste water of sterilization and flocculation treatment, the filtering suspended substance guarantees out water pollution index≤4;
4), add reductive agent
For protecting reverse osmosis membrane not to be subjected to the corrosion of chlorine residue, in waste water per ton, add 1.0 gram reductive agent sodium bisulfites, make chlorine residue≤0.1mg/L, earlier reductive agent is converted into the aqueous solution, quantitatively add pipeline with pump again;
5), add acid
In order to reduce the consumption of Scale inhibitors, quantitatively hydrochloric acid is added pipeline with pump, make the pH value of waste water be reduced to 6~7;
6), add Scale inhibitors
In order to prevent impurity foulings on the reverse osmosis face such as vitriol, carbonate, silicon-dioxide, iron, in waste water per ton, add 3 gram Scale inhibitors XM310, Scale inhibitors is converted into earlier the aqueous solution, quantitatively adds pipeline with pump again;
7), secondary filter
Enter the secondary filter device and filter, the particulate that filtering 5 μ m are above.
Selected accurate filter is a Steel Vessel, in adorn the filter core in 3~10 μ m apertures, length 25~100cm.The optional folding cartridge type of filter core shape, melt and spray cartridge type, wire-wound cartridge type and sintering core structure.
8), reverse-osmosis treated
With pressure pump above-mentioned pretreated waste water is injected reverse osmosis unit, remove impurity and salinity, obtain pure water.
Selected reverse osmosis unit product is made up of high-pressure pump, reverse osmosis membrane, penstock, instrument and pipe valve.
9), matting
The preparation scavenging solution, branch or repeatedly quantitatively injected reverse osmosis unit wash cycles reverse osmosis membrane 2~4 hours with pump.
Select acid, alkali, disodium ethylene diamine tetraacetate, sodium lauryl sulphate, sodium bisulfite proceed step by step or preparation for use.Cleaning step and time look the decision of contamination and plugging situation or prolong.
10), the degassing is handled
The pure water that reverse osmosis unit is obtained is transported in the degassing tower, sends into uncontaminated air with gas blower from the bottom, and the carbonic acid gas in the water is removed.Selected degassing tower is common plastics or Steel Vessel, in plastics or pottery many-sided ball are housed.
11), add alkali
When the acidity of water after the degassing was higher, by the neutralization of hydro-oxidation sodium, reduction acidity, making it pH value was 7~8, to satisfy water reuse index request.
After the practical stability operation, measure, reached technology, the economic target of expection:
Wastewater recycle rate is 70%, the specific conductivity of backwater≤80 μ s/cm, total hardness≤2mg/L (in CaO), system's ratio of desalinization 〉=97%, ton cost of water treatment≤1.8 yuan.
Embodiment 2:
As method and the step of embodiment 1, the disinfectant in the processing step 1 wherein is a clorox.Perhaps constant uses hydrogen peroxide, ozone to substitute good.
Embodiment 3:
As method and the step of embodiment 1, the flocculation agent in its processing step 2 is MPT100 (an Argo Scientific company product).It is good perhaps to select for use polymerize aluminum chloride (PAT) to substitute.
Embodiment 4:
As method and the step of embodiment 1, the acid in its processing step 5 is sulfuric acid.
Embodiment 5:
As method and the step of embodiment 1, the Scale inhibitors in its processing step 6 is MDC220 (an Argo Scientific company product).Perhaps select for use PT198 (HydroChem company product) good.
Embodiment 6:
Set up by technical process shown in Figure 2.
As the processing step of embodiment 1, substituted more medium filter and the accurate filter among Fig. 1 with the low pressure ultrafiltration device in Fig. 2 process flow sheet, saved flocculation treatment simultaneously.Can reach same water-quality guideline requirement.The low pressure ultrafiltration device adopts the membrane structure of tubular fibre.But easier obstruction needs the back flushing measure of reinforcement itself, and cost will exceed one one-tenth.
Day handle 10000 tons of waste water, wastewater recycle rate is 70%, the specific conductivity of backwater≤80 μ s/cm, total hardness≤2mg/L (in CaO), system's ratio of desalinization 〉=97%, ton cost of water treatment≤2.0 yuan.
Embodiment 7:
Set up by technical process shown in Figure 3.
As the processing step of embodiment 1, for the higher waste water of pH value, carbon dioxide content is low, can save the step that outgases and add alkali, can reach the index request of reuse water equally, and cost also slightly reduces.So, compared to Figure 1, saved the content that outgases and add alkali among technical process Fig. 3.
Day handle 10000 tons of waste water, wastewater recycle rate is 70%, the specific conductivity of backwater≤80 μ s/cm, total hardness≤2mg/L (in CaO), system's ratio of desalinization 〉=97%, ton cost of water treatment≤1.6 yuan.

Claims (8)

1, a kind of treatment process of viscose fiber production plant air purification cooling waste water is characterized in that it comprises following processing step:
1), waste water sterilising treatment
In pretreated waste water, add 1~5 oxygenant that restrains by waste water per ton, convert into earlier water liquid, quantitatively drop into pump again and stir sterilization in the pipeline;
2), flocculation treatment
And, convert into earlier the aqueous solution with the consumption adding flocculation agent that waste water 0.5~2 per ton restrains, and quantitatively dropping in the pipeline with pump again, process mixed flocculation 5~10 minutes makes suspended particulates flocculate into large-size with colloidalmaterial, so that filtering;
3), more medium filter filters
Waste water through sterilization and flocculation treatment enters more medium filter, and the filtering suspended substance guarantees out water pollution index≤4;
4), add reductive agent
For protecting reverse osmosis membrane not to be subjected to the corrosion of chlorine residue, in waste water per ton, add 0.5~1.0 gram reductive agent, make chlorine residue≤0.1mg/L, earlier reductive agent is converted into the aqueous solution, quantitatively add pipeline with pump again;
5), add acid
In order to reduce the consumption of Scale inhibitors, acid is quantitatively added pipeline with pump, make the pH value of waste water be reduced to 6~7;
6), add Scale inhibitors
In order to prevent the fouling on the reverse osmosis face of vitriol, carbonate, silicon-dioxide and iron contamination, in waste water per ton, add 3~6 gram Scale inhibitorss, Scale inhibitors is converted into earlier the aqueous solution, quantitatively adds pipeline with pump again;
7), secondary filter
Enter the secondary filter device and carry out secondary filter, the particulate that filtering 5 μ m are above;
8), reverse-osmosis treated
With pressure pump above-mentioned pretreated waste water is injected reverse osmosis unit, remove impurity and salinity, obtain pure water;
9), matting
The preparation scavenging solution quantitatively injected reverse osmosis unit timing wash cycles reverse osmosis membrane 2~4 hours with pump;
10), the degassing is handled
The pure water that reverse osmosis unit is obtained is transported in the degassing tower, sends into uncontaminated air with gas blower from the bottom, and the carbonic acid gas in the water is removed;
11), add alkali
When the acidity of water after the degassing was higher, by adding the alkali neutralization, reducing acidity, making it pH value was 7~8, to satisfy water reuse index request.
2,, it is characterized in that the disinfectant in the said processing step 1 is liquid chlorine, dioxide peroxide, clorox, hydrogen peroxide or ozone according to the treatment process of the described viscose fiber production plant of claim 1 air purification cooling waste water.
3,, it is characterized in that the flocculation agent in the said processing step 2 is ST, PAT or MPT100 according to the treatment process of the described viscose fiber production plant of claim 1 air purification cooling waste water.
4,, it is characterized in that the reductive agent in the said processing step 4 is a sodium bisulfite according to the treatment process of the described viscose fiber production plant of claim 1 air purification cooling waste water.
5,, it is characterized in that the acid in the said processing step 5 is hydrochloric acid or sulfuric acid according to the treatment process of the described viscose fiber production plant of claim 1 air purification cooling waste water.
6,, it is characterized in that the Scale inhibitors in the said processing step 6 is XM-310, MDC220 or PT198 according to the treatment process of the described viscose fiber production plant of claim 1 air purification cooling waste water.
7,, it is characterized in that the chemical in the said processing step 9 comprises acid, alkali, disodium ethylene diamine tetraacetate, sodium bisulfite according to the treatment process of the described viscose fiber production plant of claim 1 air purification cooling waste water.
8,, it is characterized in that the alkali in the said processing step 11 is sodium hydroxide according to the treatment process of the described viscose fiber production plant of claim 1 air purification cooling waste water.
CN 200510050125 2005-06-16 2005-06-16 Air purification cooling waste water treatment method for viscose glue fiber workshop Pending CN1880238A (en)

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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103241859A (en) * 2013-04-17 2013-08-14 宝钢集团新疆八一钢铁有限公司 Method for eliminating bactericide crystals in water treatment
CN103752118A (en) * 2014-01-23 2014-04-30 南通明诺机械有限公司 Integrated wet dust removal device for sweeper and integrated wet dust removal method thereof
CN106029580A (en) * 2014-03-14 2016-10-12 栗田工业株式会社 Method for recycling cooling water effluent and recycling apparatus
CN108439634A (en) * 2018-03-21 2018-08-24 新乡化纤股份有限公司 A method of using twin-stage special membrane recycling viscose rayon acid waste water
CN110054313A (en) * 2019-06-10 2019-07-26 新疆中泰创新技术研究院有限责任公司 A kind of viscose rayon acid waste water preprocess method
CN111875070A (en) * 2020-07-31 2020-11-03 南京大学 Preparation method of water treatment agent for advanced treatment of viscose wastewater
CN112973212A (en) * 2021-02-22 2021-06-18 宜宾丝丽雅股份有限公司 Method for cleaning filter element for viscose production

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103241859A (en) * 2013-04-17 2013-08-14 宝钢集团新疆八一钢铁有限公司 Method for eliminating bactericide crystals in water treatment
CN103752118A (en) * 2014-01-23 2014-04-30 南通明诺机械有限公司 Integrated wet dust removal device for sweeper and integrated wet dust removal method thereof
CN106029580A (en) * 2014-03-14 2016-10-12 栗田工业株式会社 Method for recycling cooling water effluent and recycling apparatus
CN108439634A (en) * 2018-03-21 2018-08-24 新乡化纤股份有限公司 A method of using twin-stage special membrane recycling viscose rayon acid waste water
CN110054313A (en) * 2019-06-10 2019-07-26 新疆中泰创新技术研究院有限责任公司 A kind of viscose rayon acid waste water preprocess method
CN111875070A (en) * 2020-07-31 2020-11-03 南京大学 Preparation method of water treatment agent for advanced treatment of viscose wastewater
CN112973212A (en) * 2021-02-22 2021-06-18 宜宾丝丽雅股份有限公司 Method for cleaning filter element for viscose production

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