CN103896468B - A kind of electrochemistry is removed and reclaims heavy metal device in solid waste - Google Patents

A kind of electrochemistry is removed and reclaims heavy metal device in solid waste Download PDF

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Publication number
CN103896468B
CN103896468B CN201410123861.9A CN201410123861A CN103896468B CN 103896468 B CN103896468 B CN 103896468B CN 201410123861 A CN201410123861 A CN 201410123861A CN 103896468 B CN103896468 B CN 103896468B
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cylindrical
cylindrical tube
arc
electrode
circular
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CN103896468A (en
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胡勤海
萧晨霞
田耘
裴毓雯
张旭
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

The invention discloses a kind of electrochemistry remove and reclaim heavy metal device in solid waste, the present invention is made up of electrochemical reactor, cathode electrode, anode electrode and cationic exchange membrane, and described electrochemical reactor entirety forms by fixing membrane support clamping plate by cylindrical column casing, inner cylindrical tube, circular bottom plate and two pieces of arcs for right cylinder.Described inner cylindrical tube center is provided with cathode electrode, laminating circular anode electrode is provided with inside cylindrical column casing, described fixing film clamping plate are that both sides semi-circular bracket is for fixing cationic exchange membrane, be fixed in inner cylindrical tube and arc is fixed between membrane support clamping plate, electrochemical reactor bottom discharge pipe is positioned at place of inner cylindrical tube bottom centre, feed-pipe and discharge nozzle symmetry are positioned at outside cylindrical column casing, and are connected with force (forcing) pump, and negative and positive level is connected with power supply.It is low that the present invention has cost of manufacture, simple to operate, and processing efficiency is high, heavy metal can be separated with waste and the advantages such as resource utilization recovery.

Description

A kind of electrochemistry is removed and reclaims heavy metal device in solid waste
Technical field
The present invention relates to offal treatment and resource technology field, particularly relate to a kind of electrochemistry and remove and reclaim heavy metal device in solid waste.
Background technology
Because current China is for the exploitation of heavy metal, smelting and processing, many heavy metals such as lead, tribute, nickel, cadmium etc. are caused to enter into air, water, soil and cause serious environmental pollution.Heavy metal has enriching, be difficult to degrade in the environment, and its toxicity all can damage animals and plants greatly, China GB8978-1996 " integrated wastewater discharge standard ", GB4284-84 " in agricultural sludge pollutant catabolic gene standard " have clear and definite regulation to the heavy metal content in the waste water neutralize agricultural sludge of discharge.Therefore need to remove the heavy metal in waste water, soil and mud.And heavy metal plays vital effect in the multiple industry of China, make the research of its resource utilization can reach the dual purpose reducing environmental pollution and the wasting of resources for reclaiming heavy metal from solid waste, there is certain economic worth and environmental benefit.
The method of disposal of current heavy metal mainly contains microbial method, chemical method, phytoremediation and electrochemical process etc.Because electrochemical method is simple to operate, stable, be not easy to cause secondary pollution etc. to have some superiority.But, waste is positioned between negative and positive level by traditional treatment unit, all adds electrolytic solution, and cannot make full use of current efficiency in cathode compartment and anolyte compartment, and the problem adding ion migration length and cause processing efficiency lower, and mainly rest on " innoxious " stage.Therefore improving treatment unit is that electrochemical process is removed and the key of middle heavy metal of recycling the waste.
Summary of the invention
The present invention is directed to the deficiency of existing treatment unit, propose a kind of electrochemistry and remove and the device reclaiming heavy metal in solid waste, and equipment cost is low, it is convenient, simple to operate to run.
A kind of electrochemistry is removed and reclaims heavy metal device in solid waste, comprises electrochemical reactor, cathode electrode, anode electrode and cationic exchange membrane;
Described electrochemical reactor, fixes membrane support clamping plate by cylindrical column casing, inner cylindrical tube, circular bottom plate and two pieces of arcs and forms; Two bottom surface opened of cylindrical column casing and inner cylindrical tube, and be coaxially fixed in circular bottom plate, circular bottom plate diameter is identical with cylindrical column casing diameter, cylindrical column casing, inner cylindrical tube and circular bottom plate surround a circular interior space and an annular external space, inner cylindrical tube sidewall has two symmetrical arc-shaped through-holes, circular bottom plate circle centre position is provided with rising pipe, and cylindrical column casing lower part is symmetrically arranged with feed-pipe and discharge nozzle; Be provided with two arcs outside inner cylindrical tube and fix membrane support clamping plate, each arc is fixed on membrane support clamping plate and is had one and inner cylindrical tube arc-shaped through-hole arc-shaped through-hole of the same size, inner cylindrical tube arc-shaped through-hole and arc fix that the arc-shaped through-hole of membrane support clamping plate is corresponding to be arranged, and described cationic exchange membrane is arranged on inner cylindrical tube and arc is fixed between membrane support clamping plate; Fix between membrane support clamping plate at inner cylindrical tube, cationic exchange membrane and arc and install waterproof gasket additional; Described cathode electrode is cylindrical electrode, be arranged on inner cylindrical tube axle center place, described anode electrode is annular tubular electrode, be fitted on the inner side-wall of cylindrical column casing, cathode anode is connected with power supply respectively, feed-pipe and discharge nozzle are respectively equipped with valve, and are connected to pressure pump respectively, described rising pipe is also provided with valve.
Described power supply is constant voltage dc source; Described cylindrical electrode is cylindrical stainless steel electrode; Annular tubular electrode is annular ruthenium platinum titanium alloy electrode;
Cathode electrode and anode electrode are exchanged, cathode electrode is changed into tubular ring electrode and is fitted on the inner side-wall of cylindrical column casing, anode electrode is changed into cylindrical electrode and is placed on inner cylindrical tube axle center place, cationic exchange membrane replaces with anion-exchange membrane, now cylindrical column casing is cathode compartment, and inner cylindrical tube is anolyte compartment.
Advantage of the present invention: the effect that effectively make use of anode and cathode electrochemical reaction, add effective contact area of waste and electrode, add the film exchange area between waste and electrolytic solution, decrease ion migration distance, heavy metal removing rate is high, and utilization rate of electrical is high, improves the problem of heavy metal recovery simultaneously, the dual purpose reducing pollution and resource reclaim can be reached, have environmental value and economic benefit concurrently.
Accompanying drawing explanation
Fig. 1 is device schematic diagram of the present invention;
Fig. 2 is reactor body schematic three dimensional views of the present invention;
Fig. 3 is the fixing membrane support clamping plate schematic diagram of reactor of the present invention annular;
Fig. 4 is reactor wiring layout of the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but the scope of application of the present invention is not limited thereto.
As shown in Figure 1, a kind of electrochemistry is removed and is reclaimed heavy metal device in solid waste, comprises electrochemical reactor, cathode electrode 1, anode electrode 3, constant voltage dc source 5 and cationic exchange membrane 2;
As shown in Figure 2,3, 4, described electrochemical reactor, fixes membrane support clamping plate 13 by cylindrical column casing 8, inner cylindrical tube 7, circular bottom plate 12 and two pieces of arcs and forms; Two bottom surface opened of cylindrical column casing and inner cylindrical tube, and be coaxially fixed in circular bottom plate, circular bottom plate diameter is identical with cylindrical column casing diameter, cylindrical column casing, inner cylindrical tube and circular bottom plate surround a circular interior space and an annular external space, inner cylindrical tube sidewall has two symmetrical arc-shaped through-holes, circular bottom plate circle centre position is provided with rising pipe 10, and cylindrical column casing lower part is symmetrically arranged with feed-pipe 11 and discharge nozzle 9; Be provided with two arcs outside inner cylindrical tube and fix membrane support clamping plate, each arc is fixed on membrane support clamping plate and is had one and inner cylindrical tube arc-shaped through-hole arc-shaped through-hole of the same size, inner cylindrical tube arc-shaped through-hole and arc fix that the arc-shaped through-hole of membrane support clamping plate is corresponding to be arranged, and described cationic exchange membrane is arranged on inner cylindrical tube and arc is fixed between membrane support clamping plate; Fix between membrane support clamping plate at inner cylindrical tube, cationic exchange membrane and arc and install waterproof gasket additional; Described cathode electrode 1 is cylindrical stainless steel electrode, be arranged on inner cylindrical tube axle center place, described anode electrode 3 is tubular ruthenium platinum titanium alloy electrode, be fitted on the inner side-wall of cylindrical column casing, cathode anode is connected with constant voltage dc source 5 respectively, feed-pipe and discharge nozzle are respectively equipped with valve, and are connected to pressure pump 6 respectively, described rising pipe is also provided with valve 4.
Embodiment 1
The waste of the present embodiment process is Hangzhou seven lattice Sewage Plant second pond mud, and the anode of employing is ruthenium platinum titanium alloy tubular ring electrode, and negative electrode is stainless steel cylindrical electrode.Described cathode anode is connected with constant pressure and flow direct supply, and voltage is 15V, and electrolytic solution is 0.05mol/L sodium chloride solution 1.5L, electrolysis 96h under room temperature condition.
Sludge treatment technique flow process is as follows: cationic exchange membrane and shim clip are attached between inner tank theca and two blocks of ring support plates, supporting plate screw and nut screws.Described anode electrode and outer tube inner wall are fitted and places, the mud that need process is added in annular urceolus by opening for feed, pass through discharge port, pipeline and valve import electrochemical reactor through force (forcing) pump, deployed electrolytic solution is joined in inner core, fix cathode electrode, on the electrode in reactor, volts DS is added by direct supply, mud is through electrochemical reactor, pipeline, valve and force (forcing) pump circulation mixing, discharge from discharge port after processing, after process, electrolytic solution is discharged through reactor bottom water outlet, solid-liquid separation reclaims heavy metal precipitation, be dried to constant weight.
Test-results is as shown in table 1:
Zinc Zn Copper Cu Plumbous Pb
Before process (mg/kg) 1362.67 275.55 142.86
After process (mg/kg) 259.41 58.41 57.22
Clearance (%) 80.96 78.80 59.95
Reclaim heavy metal compound precipitation 2.97g.
Embodiment 2
The waste of the present embodiment process is mud after the lattice Sewage Plant filter press of Hangzhou seven, and the anode of employing is ruthenium platinum titanium alloy cylindrical electrode, and negative electrode is the netted ring electrode of stainless steel.Described cathode anode is connected with constant pressure and flow direct supply, and voltage is 18V, and electrolytic solution is 0.05mol/L sodium chloride solution 2.5L, electrolysis 120h under room temperature condition.
Sludge treatment technique flow process is as follows: cationic exchange membrane and shim clip are attached between inner tank theca and two blocks of ring support plates, supporting plate screw and nut screws.Described anode electrode is positioned over inner cylindrical tube axle center place, the mud that need process is joined in inner core, cylindrical column casing inwall of being fitted by cathode electrode is placed, deployed electrolytic solution imports electrochemical reactor by discharge port, pipeline and valve through force (forcing) pump, on the electrode in reactor, volts DS is added by direct supply, electrolytic solution circulates through electrochemical reactor, pipeline, valve and force (forcing) pump, discharge from discharge port after processing, solid-liquid separation reclaims heavy metal precipitation, be dried to constant weight, after process, mud is discharged through reactor bottom outlet.
Test-results is as shown in table 2:
Zinc Zn Copper Cu Plumbous Pb
Before process (mg/kg) 1888.19 288.55 233.54
After process (mg/kg) 167.52 85.54 72.12
Clearance (%) 91.13 70.36 69.12
Reclaim heavy metal compound precipitation 2.12g.
Embodiment 3
The waste of the present embodiment process is Pb, Cd, Zn combined contamination soil, and the anode of employing is ruthenium platinum titanium alloy tubular ring electrode, and negative electrode is stainless steel cylindrical electrode.Described cathode anode is connected with constant pressure and flow direct supply, and voltage is 18V, and electrolytic solution is 0.05mol/L sodium chloride solution 1.5L, electrolysis 120h under room temperature condition.
Soil treatment technical process is as follows: cationic exchange membrane and shim clip are attached between inner tank theca and two blocks of ring support plates, supporting plate screw and nut screws.Described anode electrode and outer tube inner wall are fitted and places, the soil that need process is added in annular urceolus by opening for feed, pass through discharge port, pipeline and valve import electrochemical reactor through force (forcing) pump, deployed electrolytic solution is joined in inner core, fix cathode electrode, on the electrode in reactor, volts DS is added by direct supply, soil is through electrochemical reactor, pipeline, valve and force (forcing) pump circulation mixing, discharge from discharge port after processing, after process, electrolytic solution is discharged through reactor bottom water outlet, solid-liquid separation reclaims heavy metal precipitation, be dried to constant weight.
Test-results is as shown in table 3:
Zinc Zn Cadmium Cd Plumbous Pb
Before process (mg/kg) 767.56 12.03 1075.03
After process (mg/kg) 152.44 1.01 203.37
Clearance (%) 80.14 91.60 81.08
Reclaim heavy metal compound precipitation 1.95g.

Claims (6)

1. electrochemistry is removed and is reclaimed a heavy metal device in solid waste, comprises electrochemical reactor, cathode electrode, anode electrode and cationic exchange membrane;
It is characterized in that: described electrochemical reactor, fix membrane support clamping plate by cylindrical column casing, inner cylindrical tube, circular bottom plate and two pieces of arcs and form; Two bottom surface opened of cylindrical column casing and inner cylindrical tube, and be coaxially fixed in circular bottom plate, circular bottom plate diameter is identical with cylindrical column casing diameter, cylindrical column casing, inner cylindrical tube and circular bottom plate surround a circular interior space and an annular external space, inner cylindrical tube sidewall has two symmetrical arc-shaped through-holes, circular bottom plate circle centre position is provided with rising pipe, and cylindrical column casing lower part is symmetrically arranged with feed-pipe and discharge nozzle; Be provided with two arcs outside inner cylindrical tube and fix membrane support clamping plate, each arc is fixed on membrane support clamping plate and is had one and inner cylindrical tube arc-shaped through-hole arc-shaped through-hole of the same size, inner cylindrical tube arc-shaped through-hole and arc fix that the arc-shaped through-hole of membrane support clamping plate is corresponding to be arranged, and described cationic exchange membrane is arranged on inner cylindrical tube and arc is fixed between membrane support clamping plate; Described cathode electrode is cylindrical electrode, be arranged on inner cylindrical tube axle center place, described anode electrode is annular tubular electrode, be fitted on the inner side-wall of cylindrical column casing, cathode anode is connected with power supply respectively, feed-pipe and discharge nozzle are respectively equipped with valve, and are connected to pressure pump respectively, described rising pipe is also provided with valve.
2. a kind of electrochemistry according to claim 1 is removed and is reclaimed heavy metal device in solid waste, it is characterized in that: described power supply is constant voltage dc source.
3. a kind of electrochemistry according to claim 1 is removed and is reclaimed heavy metal device in solid waste, it is characterized in that: described cylindrical electrode is cylindrical stainless steel electrode.
4. a kind of electrochemistry according to claim 1 is removed and is reclaimed heavy metal device in solid waste, it is characterized in that: annular tubular electrode is annular ruthenium platinum titanium alloy electrode.
5. a kind of electrochemistry according to claim 1 is removed and is reclaimed heavy metal device in solid waste, it is characterized in that: fix between membrane support clamping plate at inner cylindrical tube, cationic exchange membrane and arc and install waterproof gasket additional.
6. electrochemistry is removed and is reclaimed a heavy metal device in solid waste, comprises electrochemical reactor, cathode electrode, anode electrode and anion-exchange membrane;
It is characterized in that: described electrochemical reactor, fix membrane support clamping plate by cylindrical column casing, inner cylindrical tube, circular bottom plate and two pieces of arcs and form; Two bottom surface opened of cylindrical column casing and inner cylindrical tube, and be coaxially fixed in circular bottom plate, circular bottom plate diameter is identical with cylindrical column casing diameter, cylindrical column casing, inner cylindrical tube and circular bottom plate surround a circular interior space and an annular external space, inner cylindrical tube sidewall has two symmetrical arc-shaped through-holes, circular bottom plate circle centre position is provided with rising pipe, and cylindrical column casing lower part is symmetrically arranged with feed-pipe and discharge nozzle; Be provided with two arcs outside inner cylindrical tube and fix membrane support clamping plate, each arc is fixed on membrane support clamping plate and is had one and inner cylindrical tube arc-shaped through-hole arc-shaped through-hole of the same size, inner cylindrical tube arc-shaped through-hole and arc fix that the arc-shaped through-hole of membrane support clamping plate is corresponding to be arranged, and described anion-exchange membrane is arranged on inner cylindrical tube and arc is fixed between membrane support clamping plate; Described cathode electrode is tubular ring electrode, be fitted on the inner side-wall of cylindrical column casing, described anode electrode is cylindrical electrode electrode, be placed on inner cylindrical tube axle center place, cathode anode is connected with power supply respectively, feed-pipe and discharge nozzle are respectively equipped with valve, and are connected to pressure pump respectively, described rising pipe is also provided with valve.
CN201410123861.9A 2014-03-28 2014-03-28 A kind of electrochemistry is removed and reclaims heavy metal device in solid waste Active CN103896468B (en)

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Publication number Priority date Publication date Assignee Title
CN106334710A (en) * 2015-07-13 2017-01-18 中国科学院沈阳应用生态研究所 Method for successive and directional enrichment of heavy metals in tailing sand or soil contaminated by tailing sand
CN105174672B (en) * 2015-10-13 2017-05-31 浙江大学 A kind of double-deck Binode electro-chemistry is removed and reclaims Heavy Metals in Sludge device
CN105217906B (en) * 2015-10-13 2017-10-31 浙江大学 A kind of double-layer spiral type electrochemistry removes and reclaims Heavy Metals in Sludge device
CN105750313B (en) * 2016-05-04 2019-09-10 辽宁石油化工大学 A kind of method that surfactant reinforcing organic polluted soil is electronic-biological prosthetic
CN108326030B (en) * 2018-01-11 2020-11-24 上海理工大学 Soil heavy metal prosthetic devices of convertible array electrode
CN109332372A (en) * 2018-12-14 2019-02-15 浙江中地净土科技有限公司 A kind of electro reclamation vertical unit of heavy-metal contaminated soil
CN109848202B (en) * 2019-02-28 2021-03-16 北京中岩大地科技股份有限公司 Tower-type treatment equipment for polluted soil and waste residues

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Publication number Priority date Publication date Assignee Title
CN2173247Y (en) * 1993-10-18 1994-08-03 浙江工学院 Cathod rotary separated electrolysis bath
CN1968897A (en) * 2004-06-18 2007-05-23 株式会社荏原制作所 Equipment and method for electrolytic deposition treatment
CN200958119Y (en) * 2006-06-27 2007-10-10 福建师范大学 Cylindrical double-diaphragm and cathode electrolytic bath
CN203960016U (en) * 2014-03-28 2014-11-26 浙江大学 Heavy metal device in solid waste is removed and reclaimed to electrochemistry

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2173247Y (en) * 1993-10-18 1994-08-03 浙江工学院 Cathod rotary separated electrolysis bath
CN1968897A (en) * 2004-06-18 2007-05-23 株式会社荏原制作所 Equipment and method for electrolytic deposition treatment
CN200958119Y (en) * 2006-06-27 2007-10-10 福建师范大学 Cylindrical double-diaphragm and cathode electrolytic bath
CN203960016U (en) * 2014-03-28 2014-11-26 浙江大学 Heavy metal device in solid waste is removed and reclaimed to electrochemistry

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