CN104496078A - Treatment process of high-salinity wastewater - Google Patents
Treatment process of high-salinity wastewater Download PDFInfo
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- CN104496078A CN104496078A CN201410801961.2A CN201410801961A CN104496078A CN 104496078 A CN104496078 A CN 104496078A CN 201410801961 A CN201410801961 A CN 201410801961A CN 104496078 A CN104496078 A CN 104496078A
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- reverse osmosis
- salt wastewater
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention relates to a treatment process of high-salinity wastewater and belongs to the technical field of industrial waste treatment. The treatment process comprises the following steps: adding alkali to the high-salinity wastewater to regulate the pH of the wastewater to the range of 8-10, and then removing most heavy metal ions in the high-salinity wastewater by virtue of precipitation and solid-liquid separation; orderly performing quartz sand filtration treatment and activated carbon filtration treatment on the high-salinity wastewater obtained after heavy metal removal by virtue of alkali addition; next, performing ultrafiltration treatment in a cartridge filter, and pressurizing the ultrafiltration-treated high-salinity wastewater by use of a high-pressure pump and guiding the wastewater into an internal circulating two-membrane system for treatment. The treatment process of the high-salinity wastewater has the advantages that the high-salinity wastewater is concentrated in the membrane treatment system after being pretreated by virtue of alkali addition and the like, the recovery of the yielding water is greater than 80%, and the water generated after membrane treatment is good in quality and can be directly applied to production; according to the treatment process, the high-salinity wastewater is concentrated to the utmost extent, and the key technical problems of weak pollution and plugging resistance, low water production rate and difficult concentration with which high salinity wastewater zero discharge is confronted.
Description
Technical field
The present invention relates to a kind for the treatment of process of high-salt wastewater, particularly a kind of advanced treatment process of high-salt wastewater, belongs to technical field of industrial sewage treatment.
Background technology
Along with my work, the developing rapidly of agricultural, the demand of water resources increases severely day by day, growing along with water pollution problems in the process of process water.Shortage of water resources problem is outstanding day by day.Along with the rise of film industry, the films such as ultrafiltration, nanofiltration, reverse osmosis have used very extensive in the middle of water treatment, application that especially must be general in pure water, medium field.But, because embrane method requires strict to pretreatment technology, in the middle of sewage disposal, especially in the middle of high-salt wastewater, be difficult to application; Meanwhile, because the theoretical producing water ratio of reverse osmosis is only 75%, actual producing water ratio is less than 60%, and like this, the strong brine of more than 40% directly discharges because obtaining effective reuse, wastes a large amount of valuable water resources.Industrial high salinity waste water, such as from the high-salt wastewater of the heavy contamination such as pickling, zinc-plated, Coal Chemical Industry, not only in the industrial production can etching apparatus, direct discharge also can cause the salinity of environment water to significantly improve, cause soil compaction, plant withers, bring serious negative impact to ecotope, therefore, country's strict restriction high-salt wastewater discharge, to reduce environmental pollution.Current, how economical, effectively carry out high-salt wastewater except Ficus caricaL, become the key issue that the reduction of discharging of the industry strong brines such as pickling, zinc-plated, Coal Chemical Industry, zero-emission and resource utilization reuse realize zero release.
Summary of the invention
The object of the invention is to provide a kind for the treatment of process of high-salt wastewater, and high-salt wastewater is carried out to regeneration, realizes the reduction of discharging of high-salt wastewater, zero-emission, and the rate of recovery of waste water is greater than 80%; The efficient reconcentration technology of high-salt wastewater adopted, has the advantages that resistance to high brine corrosion, anti-soil are stifled, and can realize high yield water rate, solve the problems referred to above existed in background technology.
Technical scheme of the present invention is:
A treatment process for high-salt wastewater, the pH of described high-salt wastewater is 1. 0 3. 0, specific conductivity be 5,000 10000 μ S/cm, COD is 50 100mg/L, and treatment process comprises following steps:
first in high-salt wastewater, add alkali, regulate its pH to be 8 10, then through precipitation and solid-liquid separation, to remove in high-salt wastewater the heavy metal ion such as most iron, zine ion; The alkali added is NaOH or Na
2cO
3;
to the high-salt wastewater added after alkali removing heavy metals, carry out quartz sand filtration process and activated carbon filtration process successively; Then enter cartridge filter and carry out uf processing, ultra-filtration membrane employing membrane pore size is the external pressing type hollow fibrous membrane of 0. 11 μm;
through the high-salt wastewater of uf processing, after high-pressure pump supercharging, enter the two membranous system of internal-circulation type to process, the two membranous system of internal-circulation type is made up of two cover reverse osmosis membrane apparatus, intermediate pool and pure water pond, high-salt wastewater is introduced into first step reverse osmosis membrane apparatus, add Scale inhibitors, prevent membrane module fouling; Salt in high-salt wastewater and other pollutent are concentrated after the reverse osmosis membrane interception of first step reverse osmosis membrane apparatus, and the salt in high-salt wastewater and other pollutent enter intermediate pool together along with condensed water; The pure water that first step reverse osmosis membrane apparatus is discharged enters pure water pond; The condensed water comprising salt and other pollutent in intermediate pool enters second stage reverse osmosis membrane apparatus again and concentrates further, the dense water that second stage reverse osmosis membrane apparatus is discharged enters follow-up vaporizer and carries out evaporation process, the pure water that second stage reverse osmosis membrane apparatus is discharged enters pure water pond, reuse or arrange outward
.
Described step
in, cartridge filter carries out uf processing, uf processing, and employing membrane pore size is the tubular fibre curtain type membrane of 0.2 0.4 μm; The working pressure of uf processing is 0. 05 0. 2MPa, service temperature be 20 25 ° of C, pH is 8 10; The mode that uf processing adopts immersion, hyperfiltration reverse-rinsing and matting to combine reduces film surface pollution, increases the working life of film.
Described step
in, the first step reverse osmosis membrane apparatus membrane module of the two membranous system of internal-circulation type is anti-pollution reverse osmosis membrane, and second stage reverse osmosis membrane apparatus membrane module is sea water desalination membrane, and the mode that two kinds of membrane modules combine increases the rate of recovery of system.
Adopt the present invention, after high-salt wastewater alkaline cleaning, precipitation, the metal ion in high-salt wastewater is removed, but the turbidity of waste water and SS etc. can not remove effectively; The present invention adopts quartz filter, activated charcoal filter effectively can remove turbidity in high-salt wastewater and SS.High-salt wastewater after above-mentioned primary filter, again after security personnel's filtration, uf processing, the turbidity in high-salt wastewater and SS are almost all removed, and produce water turbidity lower than 0. 1NTU, turbidity removal rate higher than 99%, and has certain removal effect to the metal ion in waste water.The present invention to add in alkali and after high-salt wastewater adopt membrane distillation process to concentrate further, the product water of reverse osmosis can be back to production.Through reverse-osmosis treated, high-salt wastewater can reconcentration 5 10 times, and namely the producing water ratio of membrane distillation unit is 80% 90%.In continuous and steady operation process, within film product water power is led and can be remained on 500 μ S/cm, ratio of desalinization is higher than 99 %, and membrane flux remains on 5 25L/ about m2h.
There is in waste water due to process of the present invention comparatively high Fe content, in order to improve the cycles of concentration of subsequent film treating processes, reducing fouling membrane, need the iron ion effectively removed in waste water.The present invention adopts alkali tune iron removal, and after the deironing of front process section, the cycles of concentration of film process can bring up to 5-10 doubly, and decreases the pollution of film.
Positively effect of the present invention is: high-salt wastewater, after adding the pre-treatment such as alkali, enters film processing system and concentrates, and produces the rate of recovery of water and is greater than 80%, and it is good that water water quality is produced in film process, can direct reuse in production; High-salt wastewater concentrates by the present invention to the full extent, the key technical problem of " anti-soil block up weak, producing water ratio is low, reconcentration is difficult " that solve that high-salinity wastewater zero-emission faces.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention schematic flow sheet.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described
A treatment process for high-salt wastewater, the pH of described high-salt wastewater is 1. 0 3. 0, specific conductivity be 5,000 10000 μ S/cm, COD is 50 100mg/L, and treatment process comprises following steps:
first in high-salt wastewater, add alkali, regulate its pH to be 8 10, then through precipitation and solid-liquid separation, to remove in high-salt wastewater the heavy metal ion such as most iron, zine ion; The alkali added is NaOH or Na
2cO
3;
to the high-salt wastewater added after alkali removing heavy metals, carry out quartz sand filtration process and activated carbon filtration process successively; Then enter cartridge filter and carry out uf processing, ultra-filtration membrane employing membrane pore size is the external pressing type hollow fibrous membrane of 0. 11 μm;
through the high-salt wastewater of uf processing, after high-pressure pump supercharging, enter the two membranous system of internal-circulation type to process, the two membranous system of internal-circulation type is made up of two cover reverse osmosis membrane apparatus, intermediate pool and pure water pond, high-salt wastewater is introduced into first step reverse osmosis membrane apparatus, add Scale inhibitors, prevent membrane module fouling; Salt in high-salt wastewater and other pollutent are concentrated after the reverse osmosis membrane interception of first step reverse osmosis membrane apparatus, and the salt in high-salt wastewater and other pollutent enter intermediate pool together along with condensed water; The pure water that first step reverse osmosis membrane apparatus is discharged enters pure water pond; The condensed water comprising salt and other pollutent in intermediate pool enters second stage reverse osmosis membrane apparatus again and concentrates further, the dense water that second stage reverse osmosis membrane apparatus is discharged enters follow-up vaporizer and carries out evaporation process, the pure water that second stage reverse osmosis membrane apparatus is discharged enters pure water pond, reuse or arrange outward
.
Described step
in, cartridge filter carries out uf processing, uf processing, and employing membrane pore size is the tubular fibre curtain type membrane of 0.2 0.4 μm; The working pressure of uf processing is 0. 05 0. 2MPa, service temperature be 20 25 ° of C, pH is 8 10; The mode that uf processing adopts immersion, hyperfiltration reverse-rinsing and matting to combine reduces film surface pollution, increases the working life of film.
Described step 3. in, the first step reverse osmosis membrane apparatus membrane module of the two membranous system of internal-circulation type is anti-pollution reverse osmosis membrane, and second stage reverse osmosis membrane apparatus membrane module is sea water desalination membrane, and the mode that two kinds of membrane modules combine increases the rate of recovery of system.
The embodiment of the present invention one: for the treatment of the pickling waste waters of certain metal products company limited.
The high-salt wastewater index of the said firm is: pH is 1-2, specific conductivity be 6000-7000 μ S/cm, COD is 50-80mg/L.
First in high-salt wastewater, add alkali, regulate its pH to be 7-9, then through precipitation and solid-liquid separation, to remove in high-salt wastewater the heavy metal ion such as most iron, zine ion; The alkali added is NaOH;
To the high-salt wastewater added after alkali removing heavy metals, carry out quartz sand filtration process and activated carbon filtration process successively; Then enter cartridge filter and carry out uf processing, ultra-filtration membrane employing membrane pore size is the external pressing type hollow fibrous membrane of 0. 11 μm;
Through the high-salt wastewater of uf processing, after high-pressure pump supercharging, enter the two membranous system of internal-circulation type to process, the two membranous system of internal-circulation type is made up of two cover reverse osmosis membrane apparatus, intermediate pool and pure water pond, high-salt wastewater is introduced into first step reverse osmosis membrane apparatus, add Scale inhibitors, prevent membrane module fouling; Salt in high-salt wastewater and other pollutent are concentrated after the reverse osmosis membrane interception of first step reverse osmosis membrane apparatus, and the salt in high-salt wastewater and other pollutent enter intermediate pool together along with condensed water; The pure water that first step reverse osmosis membrane apparatus is discharged enters pure water pond; The condensed water comprising salt and other pollutent in intermediate pool enters second stage reverse osmosis membrane apparatus again and concentrates further, the dense water that second stage reverse osmosis membrane apparatus is discharged enters follow-up vaporizer and carries out evaporation process, the pure water that second stage reverse osmosis membrane apparatus is discharged enters pure water pond, reuse or arrange outward
.
After process of the present invention, former water conductivity 6000-7000 μ S/cm, system recoveries rate 80%.
The embodiment of the present invention two: for the treatment of certain metal products company pickling factory effluent.
The high-salt wastewater index of the said firm is: pH is 2-3, specific conductivity be 5000-6000 μ S/cm, COD is 60-100mg/L.
After process of the present invention, former water conductivity 5000-6000 μ S/cm, system recoveries rate 85%.
The embodiment of the present invention three: for the treatment of certain zinc-plated pickling factory effluent.
The high-salt wastewater index of the said firm is: pH is 1-2, specific conductivity be 8000-10000 μ S/cm, COD is 50-100mg/L.
After process of the present invention, former water conductivity 8000-10000 μ S/cm, system recoveries rate 70%.
By the Operational Data Analysis to embodiment, internal-circulation type bi-membrane method of the present invention has good treatment effect to zinc-plated, the contour salt of pickling waste waters, high pollution waste water, and Waste water concentrating multiple, more than 5 times, even can reach ten times.The rate of recovery of pure water is greater than 80%, and the reuse of pure water can bring indirectly economic worth to enterprise, realizes energy-saving and emission-reduction well.
The technology of the present invention effect: 1, the rate of recovery is high; 80% is greater than to the rate of recovery of high-salt wastewater, even can reaches 90%.2, practical; Applied widely, to pickling, zinc-plated, the industry such as chemical industry, iron and steel has is extensively suitability.
Claims (3)
1. a treatment process for high-salt wastewater, the pH of described high-salt wastewater is 1. 0 3. 0, specific conductivity be 5,000 10000 μ S/cm, COD is 50 100mg/L, it is characterized in that treatment process comprises following steps:
first in high-salt wastewater, add alkali, regulate its pH to be 8 10, then through precipitation and solid-liquid separation, remove most of heavy metal ion in high-salt wastewater; The alkali added is NaOH or Na
2cO
3;
to the high-salt wastewater added after alkali removing heavy metals, carry out quartz sand filtration process and activated carbon filtration process successively; Then enter cartridge filter and carry out uf processing, ultra-filtration membrane employing membrane pore size is the external pressing type hollow fibrous membrane of 0. 11 μm;
through the high-salt wastewater of uf processing, after high-pressure pump supercharging, enter the two membranous system of internal-circulation type to process, the two membranous system of internal-circulation type is made up of two cover reverse osmosis membrane apparatus, intermediate pool and pure water pond, high-salt wastewater is introduced into first step reverse osmosis membrane apparatus, add Scale inhibitors, prevent membrane module fouling; Salt in high-salt wastewater and other pollutent are concentrated after the reverse osmosis membrane interception of first step reverse osmosis membrane apparatus, and the salt in high-salt wastewater and other pollutent enter intermediate pool together along with condensed water; The pure water that first step reverse osmosis membrane apparatus is discharged enters pure water pond; The condensed water comprising salt and other pollutent in intermediate pool enters second stage reverse osmosis membrane apparatus again and concentrates further, the dense water that second stage reverse osmosis membrane apparatus is discharged enters follow-up vaporizer and carries out evaporation process, the pure water that second stage reverse osmosis membrane apparatus is discharged enters pure water pond, reuse or arrange outward
.
2. the treatment process of a kind of high-salt wastewater according to claim 1, is characterized in that: described step
in, cartridge filter carries out uf processing, uf processing, and employing membrane pore size is the tubular fibre curtain type membrane of 0.2 0.4 μm; The working pressure of uf processing is 0. 05 0. 2MPa, service temperature be 20 25 ° of C, pH is 8 10; The mode that uf processing adopts immersion, hyperfiltration reverse-rinsing and matting to combine reduces film surface pollution.
3. the treatment process of a kind of high-salt wastewater according to claim 1, is characterized in that: described step
in, the first step reverse osmosis membrane apparatus membrane module of the two membranous system of internal-circulation type is anti-pollution reverse osmosis membrane, and second stage reverse osmosis membrane apparatus membrane module is sea water desalination membrane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410801961.2A CN104496078A (en) | 2014-12-23 | 2014-12-23 | Treatment process of high-salinity wastewater |
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| CN201410801961.2A CN104496078A (en) | 2014-12-23 | 2014-12-23 | Treatment process of high-salinity wastewater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347539A (en) * | 2015-12-15 | 2016-02-24 | 苏州依斯倍环保装备科技有限公司 | Integrated and automatic device for recycling water in industrial wastewater |
| CN107381921A (en) * | 2017-08-28 | 2017-11-24 | 苏州赛比膜分离科技有限公司 | A kind of multi-filtering membrane filtration process of high slat-containing wastewater |
| CN107601744A (en) * | 2017-10-27 | 2018-01-19 | 长江勘测规划设计研究有限责任公司 | High-salt wastewater processing system and its method |
| CN108046482A (en) * | 2018-01-29 | 2018-05-18 | 广州华浩能源环保集团股份有限公司 | A kind of organic concentration wastewater treatment method of high salinity high rigidity difficult degradation and system |
| CN113045093A (en) * | 2021-03-19 | 2021-06-29 | 黔南民族师范学院 | Treatment method of graphite product production wastewater |
| CN114105395A (en) * | 2020-08-27 | 2022-03-01 | 苏州希图环保科技有限公司 | Garbage leachate wastewater treatment process |
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| CN104108813A (en) * | 2014-07-17 | 2014-10-22 | 中国石油天然气股份有限公司 | Refining and chemical sewage desalting integrated treatment process and device |
| CN104211204A (en) * | 2013-06-03 | 2014-12-17 | 北京朗新明环保科技有限公司 | High-salt industrial wastewater treatment process system |
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2014
- 2014-12-23 CN CN201410801961.2A patent/CN104496078A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211204A (en) * | 2013-06-03 | 2014-12-17 | 北京朗新明环保科技有限公司 | High-salt industrial wastewater treatment process system |
| CN104108813A (en) * | 2014-07-17 | 2014-10-22 | 中国石油天然气股份有限公司 | Refining and chemical sewage desalting integrated treatment process and device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347539A (en) * | 2015-12-15 | 2016-02-24 | 苏州依斯倍环保装备科技有限公司 | Integrated and automatic device for recycling water in industrial wastewater |
| CN107381921A (en) * | 2017-08-28 | 2017-11-24 | 苏州赛比膜分离科技有限公司 | A kind of multi-filtering membrane filtration process of high slat-containing wastewater |
| CN107601744A (en) * | 2017-10-27 | 2018-01-19 | 长江勘测规划设计研究有限责任公司 | High-salt wastewater processing system and its method |
| CN107601744B (en) * | 2017-10-27 | 2024-02-06 | 长江勘测规划设计研究有限责任公司 | High-salt wastewater treatment system and method thereof |
| CN108046482A (en) * | 2018-01-29 | 2018-05-18 | 广州华浩能源环保集团股份有限公司 | A kind of organic concentration wastewater treatment method of high salinity high rigidity difficult degradation and system |
| CN114105395A (en) * | 2020-08-27 | 2022-03-01 | 苏州希图环保科技有限公司 | Garbage leachate wastewater treatment process |
| CN113045093A (en) * | 2021-03-19 | 2021-06-29 | 黔南民族师范学院 | Treatment method of graphite product production wastewater |
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Application publication date: 20150408 |