CN103708649A - Method for processing wastewater containing lead by combining flocculent precipitation with adsorption filtration - Google Patents
Method for processing wastewater containing lead by combining flocculent precipitation with adsorption filtration Download PDFInfo
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- CN103708649A CN103708649A CN201310738091.4A CN201310738091A CN103708649A CN 103708649 A CN103708649 A CN 103708649A CN 201310738091 A CN201310738091 A CN 201310738091A CN 103708649 A CN103708649 A CN 103708649A
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Abstract
The invention discloses a method for processing wastewater containing lead by combining flocculent precipitation with adsorption filtration. By adopting the method, lead substances are removed by using a sediment adsorption technology of combining sodium hydroxide as a reactant, combined coagulating sedimentation of poly aluminium chloride (PAC) and polyacrylamide (PAM), and active carbon adsorption, so that the lead content is controlled at about 0.5ppm. Thus, compared with the prior art, the method disclosed by the invention has the characteristics of being low in production cost, simple in operation, simple in flow and easy to control, the removal rate of the lead substances and the chemical oxygen demand (COD) respectively are about 99% and 67%, and the treatment wastewater can be discharged up to the standard completely.
Description
Technical field
The present invention relates to a kind of flocculation sediment+activated carbon adsorption and process the technological method of plumbous class material, more specifically, especially relating to combines with flocculation sediment, charcoal absorption with chemical precipitation removes plumbous technique means.
Background technology
Due to the singularity of production technique, caused the plumbous class substances content in the chemical production wastewaters such as most of relevant lead acid cells too high, more than 24ppm.The plumbous class material of waste water is first kinds of pollution matter, to human body and farm crop, all can cause great harm, relevant environmental administration of country regulation, and lead waste water must just can be discharged after strict processing is up to standard.
Therefore the removal method of lead acid cell Pb In Exhausted Water class material is removed in research, necessary.At present, Environmental Protection in China department processes discharge lead content about high density lead waste water and is at least controlled at below 1ppm, but the leaded wastewater from chemical industry of high density for plumbous class substances content more than 50ppm, the water treatment method that prior art adopts seldom can qualified discharge, or realizes under the unfavourable condition such as qualified discharge is high in processing cost, operational scheme is poor.
Summary of the invention
Object of the present invention provides the method for the processing lead waste water that a kind of flocculation sediment of effective removal Pb In Exhausted Water class material combines with adsorption filtration just for existing weak point in above-mentioned prior art.
The object of the invention is to realize by following technique measures:
Method of the present invention realizes by following step:
A, first lead waste water is regulated to the water quality of sewage through equalizing tank, precipitation and collect lead dust and the silt in waste water, evenly water quality;
B, the water afterwards process equalizing tank being regulated are sent into PH and are regulated and reaction tank, add sodium hydroxide solution, utilize chemical precipitation method to remove plumbous, make lead and alkaline reaction generate lead hydroxide precipitation, control PH 9 ~ 10;
C, then the water after b step reaction is sent into coagulative precipitation tank, by adding successively flocculant poly aluminum chloride and coagulant aids polyacrylamide, remove the remaining plumbous impurity that waits; Wherein: the add-on of flocculant poly aluminum chloride is 50 ~ 100mg/L, the add-on of coagulant aids polyacrylamide is 10 ~ 20mg/L; React and after 1.0 ~ 1.5 hours, throw out is entered in concentration basin and processed;
D, will send in activated carbon adsorption pond and carry out Adsorption for plumbous material through the water after c step precipitation, absorption 1.5 ~ 2h, described activated carbon usage quantity accounts for 1/2 ~ 2/3 of whole activated carbon adsorption pool volume; Finally the water after up to standard is entered to clean water basin.
The mode that the aluminum chloride of flocculant poly described in the present invention sucks before adopting pump automatically adds; Described coagulant aids polyacrylamide adds with dosing pump at riser tube end.
Beneficial effect of the present invention is as follows:
Because method of the present invention utilizes sodium hydroxide for reagent, PAC is combined coagulating sedimentation with PAM, the precipitation adsorption technology that activated carbon adsorption three combines is removed plumbous class material, can make lead content be controlled at 0.5ppm left and right, it is low, simple to operate that this just makes the present invention not only have compared to existing technology production cost, and flow process is simply easy to the feature of controlling, plumbous class material, COD clearance are respectively 99% and 67% left and right, and processing waste water completely can qualified discharge.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
The present invention is further described below with reference to embodiment:
Method of the present invention realizes by following step:
A, first lead waste water is regulated to the water quality of sewage through equalizing tank, precipitation and collect lead dust and the silt in waste water, evenly water quality;
B, the water afterwards process equalizing tank being regulated are sent into PH and are regulated and reaction tank, add sodium hydroxide solution, utilize chemical precipitation method to remove plumbous, make lead and alkaline reaction generate lead hydroxide precipitation, control PH 9 ~ 10;
C, then the water after b step reaction is sent into coagulative precipitation tank, by adding successively flocculant poly aluminum chloride and coagulant aids polyacrylamide, remove the remaining plumbous impurity that waits; Wherein: the add-on of flocculant poly aluminum chloride is that 50 ~ 100mg/L(is that every premium on currency adds 50 ~ 100mg), the add-on of coagulant aids polyacrylamide is that 10 ~ 20mg/L(is that every premium on currency adds 10 ~ 20mg); React and after 1.0 ~ 1.5 hours, throw out is entered in concentration basin and processed;
D, will send in activated carbon adsorption pond and carry out Adsorption for plumbous material through the water after c step precipitation, absorption 1.5 ~ 2h, described activated carbon usage quantity accounts for 1/2 ~ 2/3 of whole activated carbon adsorption pool volume; Finally the water after up to standard is entered to clean water basin.
The mode that the aluminum chloride of flocculant poly described in the present invention sucks before adopting pump automatically adds; Described coagulant aids polyacrylamide adds with dosing pump at riser tube end.
Embodiment is as follows:
embodiment 1:
A, first with the water yield of 2t/h, lead waste water is regulated to the water quality of sewage through deflector type equalizing tank, precipitation and collect lead dust and the silt in waste water, evenly water quality;
B, the water that will regulate through equalizing tank are afterwards sent into PH and are regulated and reaction tank, add sodium hydroxide solution, utilize chemical precipitation method to remove plumbous, make lead and alkaline reaction generate lead hydroxide precipitation, by PH auto-controller monitoring alkali lye dosage, detect plumbous class material clearance; Control PH 9 ~ 10;
C, then the water after b step reaction is sent into coagulative precipitation tank, the mode sucking before coagulating sedimentation partly adopts pump automatically adds flocculant poly aluminum chloride PAC, at riser tube end, with dosing pump, add coagulant aids polyacrylamide PAM, by adding polymerize aluminum chloride and polyacrylamide, remove the remaining plumbous impurity that waits; Wherein: the add-on of polymerize aluminum chloride is 70mg/L, the add-on of polyacrylamide is 15mg/L; React and after 1.0 hours, throw out is entered in concentration basin and processed;
D, will send in activated carbon adsorption pond and carry out Adsorption for plumbous material through the water after c step precipitation, absorption 2h, described activated carbon usage quantity accounts for 1/2 ~ 2/3 of whole activated carbon adsorption pool volume; Finally the water after up to standard is entered to clean water basin.
embodiment 2:
A, first with the water yield of 2t/h, lead waste water is regulated to the water quality of sewage through deflector type equalizing tank, precipitation and collect lead dust and the silt in waste water, evenly water quality;
B, the water that will regulate through equalizing tank are afterwards sent into PH and are regulated and reaction tank, add sodium hydroxide solution, utilize chemical precipitation method to remove plumbous, make lead and alkaline reaction generate lead hydroxide precipitation, by PH auto-controller monitoring alkali lye dosage, detect plumbous class material clearance; Control PH 9 ~ 10;
C, then the water after b step reaction is sent into coagulative precipitation tank, the mode sucking before coagulating sedimentation partly adopts pump automatically adds flocculant poly aluminum chloride PAC, at riser tube end, with dosing pump, add coagulant aids polyacrylamide PAM, by adding polymerize aluminum chloride and polyacrylamide, remove the remaining plumbous impurity that waits; Wherein: the add-on of polymerize aluminum chloride is 50mg/L, the add-on of polyacrylamide is 10mg/L; React and after 1.5 hours, throw out is entered in concentration basin and processed;
D, will send in activated carbon adsorption pond and carry out Adsorption for plumbous material through the water after c step precipitation, absorption 2h, described activated carbon usage quantity accounts for 1/2 ~ 2/3 of whole activated carbon adsorption pool volume; Finally the water after up to standard is entered to clean water basin.
embodiment 3:
A, first with the water yield of 2t/h, lead waste water is regulated to the water quality of sewage through deflector type equalizing tank, precipitation and collect lead dust and the silt in waste water, evenly water quality;
B, the water that will regulate through equalizing tank are afterwards sent into PH and are regulated and reaction tank, add sodium hydroxide solution, utilize chemical precipitation method to remove plumbous, make lead and alkaline reaction generate lead hydroxide precipitation, by PH auto-controller monitoring alkali lye dosage, detect plumbous class material clearance; Control PH 9 ~ 10;
C, then the water after b step reaction is sent into coagulative precipitation tank, the mode sucking before coagulating sedimentation partly adopts pump automatically adds flocculant poly aluminum chloride PAC, at riser tube end, with dosing pump, add coagulant aids polyacrylamide PAM, by adding polymerize aluminum chloride and polyacrylamide, remove the remaining plumbous impurity that waits; Wherein: the add-on of polymerize aluminum chloride is 100mg/L, the add-on of polyacrylamide is 10mg/L; React and after 1.5 hours, throw out is entered in concentration basin and processed;
D, will send in activated carbon adsorption pond and carry out Adsorption for plumbous material through the water after c step precipitation, absorption 2h, described activated carbon usage quantity accounts for 1/2 ~ 2/3 of whole activated carbon adsorption pool volume; Finally the water after up to standard is entered to clean water basin.
embodiment 4:
A, first with the water yield of 2t/h, lead waste water is regulated to the water quality of sewage through deflector type equalizing tank, precipitation and collect lead dust and the silt in waste water, evenly water quality;
B, the water that will regulate through equalizing tank are afterwards sent into PH and are regulated and reaction tank, add sodium hydroxide solution, utilize chemical precipitation method to remove plumbous, make lead and alkaline reaction generate lead hydroxide precipitation, by PH auto-controller monitoring alkali lye dosage, detect plumbous class material clearance; Control PH 9 ~ 10;
C, then the water after b step reaction is sent into coagulative precipitation tank, the mode sucking before coagulating sedimentation partly adopts pump automatically adds flocculant poly aluminum chloride PAC, at riser tube end, with dosing pump, add coagulant aids polyacrylamide PAM, by adding polymerize aluminum chloride and polyacrylamide, remove the remaining plumbous impurity that waits; Wherein: the add-on of polymerize aluminum chloride is 100mg/L, the add-on of polyacrylamide is 20mg/L; React and after 1.5 hours, throw out is entered in concentration basin and processed;
D, will send in activated carbon adsorption pond and carry out Adsorption for plumbous material through the water after c step precipitation, absorption 2h, described activated carbon usage quantity accounts for 1/2 ~ 2/3 of whole activated carbon adsorption pool volume; Finally the water after up to standard is entered to clean water basin.
At coagulating sedimentation described in above each embodiment and activated carbon adsorption, can in integrated mobile container reaction unit, carry out.
The present invention tests the leaded organic waste water of Yuan Shuiweimou lead acid cell factory, plumbous class and COD content 50,150PPm, and after processing, plumbous class material and COD clearance are respectively 99% and 67%.
These are only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (2)
1. a method for the processing lead waste water that flocculation sediment combines with adsorption filtration, is characterized in that: described method realizes by following steps:
A, first lead waste water is regulated to the water quality of sewage through equalizing tank, precipitation and collect lead dust and the silt in waste water, evenly water quality;
B, the water afterwards process equalizing tank being regulated are sent into PH and are regulated and reaction tank, add sodium hydroxide solution, utilize chemical precipitation method to remove plumbous, make lead and alkaline reaction generate lead hydroxide precipitation, control PH 9 ~ 10;
C, then the water after b step reaction is sent into coagulative precipitation tank, by adding successively flocculant poly aluminum chloride and coagulant aids polyacrylamide, remove the remaining plumbous impurity that waits; Wherein: the add-on of flocculant poly aluminum chloride is 50 ~ 100mg/L, the add-on of coagulant aids polyacrylamide is 10 ~ 20mg/L; React and after 1.0 ~ 1.5 hours, throw out is entered in concentration basin and processed;
D, will send in activated carbon adsorption pond and carry out Adsorption for plumbous material through the water after c step precipitation, absorption 1.5 ~ 2h, described activated carbon usage quantity accounts for 1/2 ~ 2/3 of whole activated carbon adsorption pool volume; Finally the water after up to standard is entered to clean water basin.
2. the method for the processing lead waste water that flocculation sediment according to claim 1 combines with adsorption filtration, is characterized in that: the mode that described flocculant poly aluminum chloride sucks before adopting pump automatically adds; Described coagulant aids polyacrylamide adds with dosing pump at riser tube end.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103922503A (en) * | 2014-04-10 | 2014-07-16 | 界首市双特新材料科技有限公司 | Water purification cycle process in modified reprocessed plastic production |
| CN104860448A (en) * | 2015-06-09 | 2015-08-26 | 安徽利和水务有限公司 | System and method for treating lead-containing and phosphorus-containing wastewater |
| CN105060562A (en) * | 2015-08-13 | 2015-11-18 | 山东省环科院环境工程有限公司 | Deep treatment method of tannery wastewater |
| CN105236537A (en) * | 2015-10-23 | 2016-01-13 | 苏州书瑞环保科技有限公司 | Waste water treatment material for removing lead ions in water and preparation method of waste water treatment material |
| CN106698824A (en) * | 2016-12-27 | 2017-05-24 | 兰州理工大学 | Treatment method of lead-containing wastewater in printing ink factory |
| CN107162302A (en) * | 2017-06-20 | 2017-09-15 | 临涣焦化股份有限公司 | It is a kind of that chimney can be condensed to the method that Sewage treatment is utilized |
| CN110963611A (en) * | 2019-12-18 | 2020-04-07 | 上海勘察设计研究院(集团)有限公司 | Method for removing heavy metals of lead and arsenic, chromaticity and reducing substances in printing and dyeing wastewater |
| CN115432791A (en) * | 2022-09-03 | 2022-12-06 | 郑州楷润市政工程设计有限公司 | Water treatment combined medicament and nanofiltration concentrated water composite treatment process thereof |
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| CN110963611A (en) * | 2019-12-18 | 2020-04-07 | 上海勘察设计研究院(集团)有限公司 | Method for removing heavy metals of lead and arsenic, chromaticity and reducing substances in printing and dyeing wastewater |
| CN115432791A (en) * | 2022-09-03 | 2022-12-06 | 郑州楷润市政工程设计有限公司 | Water treatment combined medicament and nanofiltration concentrated water composite treatment process thereof |
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Application publication date: 20140409 |