CN102815831B - Device and method for treating heavy metal wastewater and recovering heavy metal - Google Patents
Device and method for treating heavy metal wastewater and recovering heavy metal Download PDFInfo
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- CN102815831B CN102815831B CN201210347169.5A CN201210347169A CN102815831B CN 102815831 B CN102815831 B CN 102815831B CN 201210347169 A CN201210347169 A CN 201210347169A CN 102815831 B CN102815831 B CN 102815831B
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- heavy metal
- flocculation
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Abstract
The invention discloses a device and method for treating heavy metal wastewater and recovering heavy metal. The device comprises an aeration flocculation-adsorption tank, a settling pond, a filtering pond, a chelation reaction device and an electrolytic tank. The wastewater containing the heavy metal is treated by virtue of organic flocculation and inorganic adsorption, the treated wastewater is recycled, and the heavy metal is effectively recovered. The circulation utilization ratio in the whole device is high, and the wastewater treatment method combines ecological benefits with economic benefits.
Description
Technical field
The present invention relates to technical field of waste water processing, be specifically related to a kind of device and method for the treatment of heavy metal wastewater thereby and recovery heavy metal.
Background technology
Along with the development of China's plating, electronic industry and metallurgical industry, heavy metal pollution of water body problem is very outstanding, and heavy metal wastewater thereby not only produces greatly and pollutes environment, and more serious harm is to HUMAN HEALTH.Therefore, countries in the world are quite paid attention to the processing of heavy metal wastewater thereby now.In addition, heavy metal wastewater thereby is also a kind of resource, and many heavy metals are all more expensive.If the heavy metal in waste water is reclaimed as a kind of resource, not only solved the pollution of heavy metal, but also there is certain economic benefit.
At present, process for treating heavy-metal waste water has chemical method, Physical, biochemical process conventionally.Chemical method is conventional comprises chemical precipitation method and electrolytic process etc., Physical comprises ion exchange method and membrane separation technique method etc., but these methods are higher to water quality requirement in actual applications, the precipitator method require the waste water of processing to have higher flco fractal dimension, be in treating processes, to form larger more flco, so just can make effect of settling good, Physical is applicable to the processing containing low concentration effluent containing heavy metal ions.Biochemical process is to utilize the metabolite of microorganism or microorganisms to precipitate a kind of method of scrubbing, BOD, COD content requirement that its biodegradability to waste water is waste water are higher, larger to organic high-concentration waste water intractability, and in microorganism adsorption process, loading capacity is subject to the impact of environmental factors, and microorganism has selectivity to the absorption of heavy metal, and heavy metal wastewater thereby often contains multiple harmful heavy metal, affect the effect of microorganism, restricted in application.
Present situation based on current processing heavy metal wastewater thereby, the present invention is the integrated heavy metal wastewater thereby of processing of several technology, and reclaims the heavy metal in waste water, brings into play the strong point of several technology simultaneously, realize the dual purpose that waste water recycling and heavy metal reclaim, obtain good economic benefit and environmental benefit.
Summary of the invention
The object of the invention is to provide a kind of device and method for the treatment of heavy metal wastewater thereby and recovery heavy metal.Concrete scheme is as follows:
For the treatment of the device of heavy metal wastewater thereby and recovery heavy metal, this device comprises: aeration flocculation-adsorption tanks 5, settling tank 6, multi-medium filtering tank 7, chelatropic reaction device 18 and electrolyzer 19.
Aeration flocculation-adsorption tanks 5 and settling tank 6 combinations, heavy metal wastewater thereby 1 first, through aeration flocculation-adsorption tanks 5, wherein adds flocculation agent PAM 2, by aeration, mixes, then water outlet flows to settling tank 6, in this part pond, add chitosan 3, the particle after chitosan 3 adsorption-flocculations makes it precipitation, and flocculation agent PAM 2 carries out compound action with chitosan 3, at 5 ends of aeration flocculation-adsorption tanks, pass into air 4 and carry out aeration, play even mixing effect, settling tank 6 adopts transverse slat precipitation, improves sedimentation effect.
In multi-medium filtering tank 7, be equipped with and load hard coal and the quartz sand that height ratio is 1: 2, top is hard coal filtering layer 8, and bottom is oarse-grained quartz sand filtering layer 9, and the current residence time reaches and strengthens filtration area and filter effect more than remaining on 30min.
Chelatropic reaction device 18 is provided with chelatropic reaction pond 10, inclined-plate clarifying basin 11, hyperfiltration membrane assembly 12, polymer recycled pond 13 and micro-filtration membrane module 14 successively, heavy metal and larger molecular organics generation chelatropic reaction in this device.
Electrolyzer 19 cathode and anode are iron plate 20, take ferrous hydroxide colloid as core, and under alternating-electric field effect, colloid and heavy metal constantly, in anode polymerization, are plated in anode surface by heavy metal, and heavy metal is recycled.
Utilize this device to process the method for heavy metal wastewater thereby and recovery heavy metal, comprise the following steps:
The first step: flocculate-adsorb, precipitate, first heavy metal wastewater thereby 1 flocculates-adsorb under PAM 2 and chitosan 3 compound actions, then precipitate through settling tank 6, by flocculating, adsorb and precipitating, heavy metal wastewater thereby is carried out to pre-treatment;
Second step: filter, be settled out water and flow into multi-medium filtering tank 7, make pretreated waste water under the effect of filtration medium hard coal and quartz sand, remove the throw out of flocculation;
The 3rd step: chelatropic reaction, 7 water outlets of multi-medium filtering tank flow into chelatropic reaction device 18, make heavy metal and larger molecular organics carry out chelatropic reaction, by chelatropic reaction, ultrafiltration, precipitation, contact break reaction and a series of steps of micro-filtration, producing water 17 can recycle, and the residue concentrated solution that contains heavy metal enters electrolyzer 19;
The 4th step: electrolytic action, chelatropic reaction water outlet enters electrolyzer 19, by electrolytic action, heavy metal is recycled, and electrochemistry product water can reenter technical process and carry out wastewater treatment.
Method of the present invention has that good waste water treatment effect, each operation stage cyclic utilization rate are high, workable, heavy metal rate of recovery advantages of higher.By flocculation and adsorption precipitation, heavy metal wastewater thereby is carried out to pre-treatment, recycling heavy metal is combined use with the complex reaction mechanism of organic macromolecule with ultra-filtration equipment, in this technique, effective combination is reacted in complexing with decomplexing, organic polymer machine thing is recycled, the electrolyzer that the iron plate that take is electrode, by efficient recovery heavy metal, recycles heavy metal.
Technique operability of the present invention is high, at effective removal heavy metal waste water simultaneously, realizes the recovery of heavy metal, thereby fully demonstrate its environmental benefit, economic benefit and social benefit by electrolyzer.
Accompanying drawing explanation
Fig. 1 is process flow sheet;
Fig. 2 is according to the schematic diagram of device aeration flocculation-adsorption tanks of the present invention;
Fig. 3 is according to the schematic diagram of the settling tank of device of the present invention;
Fig. 4 is according to the schematic diagram of the multi-medium filtering tank of device of the present invention;
Fig. 5 is according to the schematic diagram of the chelatropic reaction device of device of the present invention;
Fig. 6 is according to the schematic diagram of the electrolyzer of device of the present invention.
Wherein, 1 is waste water; 2 is PAM; 3 is chitosan; 4 is air; 5 is aeration flocculation-adsorption tanks; 6 is settling tank; 7 is multi-medium filtering tank; 8 is hard coal filtering layer; 9 is quartz sand filtering layer; 10 is chelatropic reaction pond; 11 is inclined-plate clarifying basin; 12 is hyperfiltration membrane assembly; 13 is polymer recycled pond; 14 is micro-filtration membrane module; 15 is disodium ethylene diamine tetraacetate (EDTA); 16 is hydrochloric acid; 17 for producing water; 18 is chelatropic reaction device; 19 is electrolyzer; 20 is the iron plate of doing negative electrode and anode; 21 is DC power supply; 22 is scum silica frost.
Embodiment
For the treatment of the device of heavy metal wastewater thereby and recovery heavy metal, this device comprises: aeration flocculation-adsorption tanks 5, settling tank 6, multi-medium filtering tank 7, chelatropic reaction device 18 and electrolyzer 19.
Aeration flocculation-adsorption tanks 5 and settling tank 6 combinations, heavy metal wastewater thereby 1 first, through aeration flocculation-adsorption tanks 5, wherein adds flocculation agent PAM 2, by aeration, mixes, then water outlet flows to settling tank 6, in this part pond, add chitosan 3, the particle after chitosan 3 adsorption-flocculations makes it precipitation, and flocculation agent PAM 2 carries out compound action with chitosan 3, at 5 ends of aeration flocculation-adsorption tanks, pass into air 4 and carry out aeration, play even mixing effect, settling tank 6 adopts transverse slat precipitation, improves sedimentation effect.
In multi-medium filtering tank 7, be equipped with and load hard coal and the quartz sand that height ratio is 1: 2, top is hard coal filtering layer 8, and bottom is oarse-grained quartz sand filtering layer 9, and the current residence time reaches and strengthens filtration area and filter effect more than remaining on 30min.
Chelatropic reaction device 18 is provided with chelatropic reaction pond 10, inclined-plate clarifying basin 11, hyperfiltration membrane assembly 12, polymer recycled pond 13 and micro-filtration membrane module 14 successively, heavy metal and larger molecular organics generation chelatropic reaction in this device.
Electrolyzer 19 cathode and anode are iron plate 20, take ferrous hydroxide colloid as core, and under alternating-electric field effect, colloid and heavy metal constantly, in anode polymerization, are plated in anode surface by heavy metal, and heavy metal is recycled.
Utilize this device to process the method for heavy metal wastewater thereby and recovery heavy metal, comprise the following steps:
The first step: flocculate-adsorb, precipitate, first heavy metal wastewater thereby 1 flocculates-adsorb under PAM 2 and chitosan 3 compound actions, then precipitate through settling tank 6, by flocculating, adsorb and precipitating, heavy metal wastewater thereby is carried out to pre-treatment;
Second step: filter, be settled out water and flow into multi-medium filtering tank 7, make pretreated waste water under the effect of filtration medium hard coal and quartz sand, remove the throw out of flocculation;
The 3rd step: chelatropic reaction, 7 water outlets of multi-medium filtering tank flow into chelatropic reaction device 18, make heavy metal and larger molecular organics carry out chelatropic reaction, by chelatropic reaction, ultrafiltration, precipitation, contact break reaction and a series of steps of micro-filtration, producing water 17 can recycle, and the residue concentrated solution that contains heavy metal enters electrolyzer 19;
The 4th step: electrolytic action, chelatropic reaction water outlet enters electrolyzer 19, by electrolytic action, heavy metal is recycled, and electrochemistry product water can reenter technical process and carry out wastewater treatment.
Claims (1)
1. one kind for the treatment of heavy metal wastewater thereby and reclaim the method for heavy metal, it is characterized in that: use a kind of device for the treatment of heavy metal wastewater thereby and recovery heavy metal, this device comprises: aeration flocculation-adsorption tanks (5), settling tank (6), multi-medium filtering tank (7), chelatropic reaction device (18) and electrolyzer (19), described aeration flocculation-adsorption tanks (5) and settling tank (6) combination, heavy metal wastewater thereby (1) is first through aeration flocculation-adsorption tanks (5), wherein add flocculation agent PAM(2), by aeration, mix, then water outlet flows to settling tank (6), in this part pond, add chitosan (3), particle after chitosan (3) adsorption-flocculation makes it precipitation, flocculation agent PAM(2) carry out compound action with chitosan (3), at aeration flocculation-adsorption tanks (5) end, pass into air (4) and carry out aeration, play even mixing effect, settling tank (6) adopts transverse slat precipitation, improve sedimentation effect, in described multi-medium filtering tank (7), be equipped with and load hard coal and the quartz sand that height ratio is 1: 2, top is hard coal filtering layer (8), bottom is oarse-grained quartz sand filtering layer (9), more than the current residence time remains on 30min, reach and strengthen filtration area and filter effect, described chelatropic reaction device (18) is provided with chelatropic reaction pond (10) successively, inclined-plate clarifying basin (11), hyperfiltration membrane assembly (12), polymer recycled pond (13) and micro-filtration membrane module (14), heavy metal and larger molecular organics generation chelatropic reaction in this device, , described electrolyzer (19) the moon, anode is iron plate (20), take ferrous hydroxide colloid as core, under alternating-electric field effect, colloid and heavy metal are constantly in anode polymerization, heavy metal is plated in to anode surface, heavy metal is recycled, said method comprising the steps of:
The first step: flocculate-adsorb, precipitate, heavy metal wastewater thereby (1) is at PAM(2) with under chitosan (3) compound action first flocculate-adsorb, then pass through settling tank (6) precipitation, by flocculating, adsorb and precipitating, heavy metal wastewater thereby is carried out to pre-treatment;
Second step: filter, be settled out water and flow into multi-medium filtering tank (7), make pretreated waste water under the effect of filtration medium hard coal and quartz sand, remove the throw out of flocculation;
The 3rd step: chelatropic reaction, multi-medium filtering tank (7) water outlet flows into chelatropic reaction device (18), make heavy metal and larger molecular organics carry out chelatropic reaction, by chelatropic reaction, ultrafiltration, precipitation, contact break reaction and micro-filtration series of steps, produce water (17) and recycle, the residue concentrated solution that contains heavy metal enters electrolyzer (19);
The 4th step: electrolytic action, chelatropic reaction water outlet enters electrolyzer (19), by electrolytic action, heavy metal is recycled, and electrochemistry product water can reenter technical process and carry out wastewater treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210347169.5A CN102815831B (en) | 2012-09-19 | 2012-09-19 | Device and method for treating heavy metal wastewater and recovering heavy metal |
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| CN201210347169.5A CN102815831B (en) | 2012-09-19 | 2012-09-19 | Device and method for treating heavy metal wastewater and recovering heavy metal |
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| CN102815831B true CN102815831B (en) | 2014-07-30 |
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| US10175217B2 (en) * | 2014-02-28 | 2019-01-08 | Arkray, Inc. | Method for recovery metal and metal recovery reagent |
| CN104445790B (en) * | 2014-10-27 | 2016-05-11 | 乔世琴 | Comprehensive purifying is containing method and the device thereof of heavy metal ion and organic wastewater |
| CN104944649A (en) * | 2015-07-10 | 2015-09-30 | 常州市龙润机械有限公司 | Chemical waste water treatment method and treatment device |
| CN105174567B (en) * | 2015-11-05 | 2017-07-07 | 湖南先科环保有限公司 | A kind of heavy metal containing wastewater treatment and recovery system and method |
| CN105984978B (en) * | 2016-05-12 | 2019-05-14 | 浙江海洋大学 | A kind for the treatment of process of wastewater from aquatic product process |
| CN108083499A (en) * | 2017-12-23 | 2018-05-29 | 苏州赛源微电子有限公司 | A kind of processing method of integrated circuit plate cleaning solution waste water |
| CN108083498A (en) * | 2017-12-23 | 2018-05-29 | 苏州赛源微电子有限公司 | A kind of environment-friendly preparation method thereof of integrated circuit plate |
| CN110734113B (en) * | 2018-07-20 | 2022-01-28 | 郑光炜 | Waste water treatment device |
| CN112174440B (en) * | 2020-10-19 | 2022-11-15 | 张家港市五湖新材料技术开发有限公司 | Heavy metal wastewater treatment process |
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| CN101219838A (en) * | 2008-01-25 | 2008-07-16 | 北京交通大学 | Method for processing heavy metal industrial waste water with low concentration |
| CN102642991B (en) * | 2012-04-28 | 2013-12-04 | 南京大学 | Efficient combination advanced treatment method for electroplating wastewater |
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Effective date of registration: 20191122 Address after: No.31, floor 1, building 5, Shuangqiao East Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Bolen Technology Co.,Ltd. Address before: 102200 Beijing City, Changping District science and Technology Park white floating Road 10 No. 2 No. Beikong science and Technology Building Room 226 Patentee before: Beijing Green All Environment Technology Co.,Ltd. |
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