CN103787466A - Pulse enrichment device and method for quick treatment of high-concentration heavy metal wastewater - Google Patents
Pulse enrichment device and method for quick treatment of high-concentration heavy metal wastewater Download PDFInfo
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Abstract
The invention relates to a pulse enrichment device and method for quick treatment of high-concentration heavy metal wastewater and discloses a novel heavy metal wastewater treatment device. The device comprises a filler tank, a direct current power supply, a wastewater recycling system and a leacheate recycling system. A metal electrode wire, ferric and carbon nano filter and a graphite electrode rod are used, the metal electrode wire and the graphite electrode rod are connected with the direct current power supply to enrich heavy metals, and the heavy metals are treated by the leacheate recycling system and discharged from the bottom of a concentration tank. When the heavy metals are treated, the leacheate can be further heated and recycled by a heating resistor in the concentration tank. The device provided by the invention can quickly purify the high-concentration heavy metal wastewater effectively and meanwhile can produce high-concentration heavy metal slurry to recover the heavy metals conveniently; therefore, the device has high economic and social values.
Description
Technical field
The present invention relates to heavy metal containing wastewater treatment field, particularly relate to and process high-concentration heavy metal waste water and reclaim a kind of waste water fast processing of metals resources and the device and method of pulse enriching heavy metal.
Background technology
At present; environmental protection problem has caused global generally attention; along with scientific and technological progress; in chemical industry, the novel source of pollution of the heavy metal of a large amount of high densitys progressively manifest; as etching solution etc. also gets more and more containing the waste water of heavy metal ion; and these heavy metal ion are along with waste water enters in environmental pollution arable land, drinking water source; seriously jeopardize on the one hand the healthy and safe of the mankind; on the other hand; in China, per capita under the national conditions of scarcity of resources, the outer row of this large amount of heavy metal is also a kind of waste of resource.Accordingly, China points out that in " National Program for Medium-to Long-term Scientific and Technological Development (2006～the year two thousand twenty) " the preferential theme comprehensive water-saving of environmental area wants primary study comprehensive anti-pollution and recycling waste, exploitation abnormal pollution control techniques, the application technology as the second resource such as waste, heavy polluted industry cleaner production integrated technology etc.Therefore developing practical high density heavy metal processes and retrieving arrangement, for eliminating heavy metal pollution of water body, guarantee resident living drinking water safety, to build harmonious " amphitypy " society not only extremely urgent but also of far-reaching significance, possess economic worth and also possess social value.
At present, mainly be confined to evaporation concentration, the large class of chemical precipitation two for the treatment process of high-concentration heavy metal waste water, directly the method for evaporation concentration industry running cost is too high, some may reach every cubic metre, tens of units, and exist thermal pollution, large quantity of moisture to cause the distinct disadvantage such as evaporation time is very long, and chemical precipitation method is widely used as comparatively ripe method, also cause certain pollution to environment but process a large amount of mud that produce.
In recent years, Treatment and recovery high-concentration heavy metal waste water becomes hot research direction.Chinese patent CN 101935119 A have reported that one utilizes resin absorption, filtration ultrafiltration, reverse osmosis, activated carbon fiber to adsorb and resin mixed bed is processed heavy metal wastewater thereby, use extraction back extraction to be reduced into metal simple-substance or metal-salt to realize the inventive method of the recycling of electroplating wastewater, but treatment process process very complicated, and exist related film process high, the extraction liquid of use cost easily produce secondary pollution defect, fundamentally efficient cheap recovery heavy metal.Therefore the heavy metal containing wastewater treatment that, develop that a kind of technology is reliable, economical rationality is feasible, non-secondary pollution produces and equipment and the process matched therewith of resource utilization have very important meaning.
Summary of the invention
Technical problem solved by the invention is to provide a kind of device and method of high-concentration heavy metal waste water fast processing pulse enrichment, this pulse enriching apparatus utilizes modification adsorption stuffing Electric field assisted deposition method to process high-concentration heavy metal waste water, and heavy metal element is wherein reclaimed, heavy metal treatment process and equipment than other have of many uses, easy handling, the advantage such as with low cost, and it is high to have integrated degree, does not produce the advantages such as secondary pollution.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus, comprise filling tank, wherein, on described filling tank, be provided with four openings, four openings are divided into two groups, every group of opening comprises respectively an inlet openings and an exit opening, and two groups of openings connect waste water circulation system and the leacheate recycle system by sealing-duct respectively
On the outer wall of described filling tank, be wound with metal electrode lines, and packing layer is set in filling tank, in this packing layer, uniform filling has magnetic iron carbon Nano filling, meanwhile, is fitted with a root graphite electrode rod in iron carbon Nano filling layer;
Described waste water circulation system comprises waste water pump and connecting tube, and described connecting tube is connected respectively to the import of one group of filling tank both sides and the upper open circuit that forms of outlet, and waste water pump is connected on the pipeline of inlet section;
The described leacheate recycle system comprises leacheate peristaltic pump, leacheate storage tank, prolong and concentration tank, described leacheate peristaltic pump, leacheate storage tank, prolong, concentration tank are connected on another group import and the upper closed loop that forms of outlet of filling tank successively, described concentration tank bottom is inclined-plane, the upper domatic side on inclined-plane is provided with heating resistor, and Caused by Sloping Surfaces bottom is provided with the outlet of a slurries outlet connection metal pregnant solution;
In addition, be also provided with in the present invention an at least direct supply with two groups of output interfaces, the Graphite Electrodes rod of one group of bonding pad tank in two groups of output interfaces, metal electrode lines and other one group of heating resistor connecting in concentration tank.
In the present invention, described filling tank tank body adopts soda acid inertia and the material that do not possess adsorptivity is made.
In the present invention, one, two pipelines that described waste water circulation system is stretched out from filling tank both sides connect pending wastewater disposal basin, and another root connects the purification liquid pool of finishing dealing with.
In the present invention, on described each connecting pipeline, be provided with check valve, and this check valve adopts soda acid inertia and the material that do not possess adsorptivity is made.
In the present invention, the solution medium in described concentration tank is hydrochloric acid, its content of hydrochloric acid 20%.
In the present invention, described direct supply can and can carry out positive and negative electrode switching for any direct current of connected provide≤80V of filling tank device electrode.
In the present invention, on the pipeline between slurries outlet and the outlet of metal enrichment liquid of described concentration tank bottom, be connected with a sludge pump.
In the present invention, the rule of the one group of output interface being connected with Graphite Electrodes rod, the metal electrode lines of filling tank in two groups of output interfaces of described direct supply in the time that electric power is exported is: while processing waste water, Graphite Electrodes rod is negative electrode, metal electrode lines is anode, when metal is reclaimed in activation, Graphite Electrodes rod is anode, and metal electrode lines is negative electrode.
The present invention is in the time of work, the heavy metal concentration principle of utilizing of the leacheate recycle system is constructed a thermal backflow system, in concentration tank, liquid is solvent and the metal-salt of leacheate storage tank, concentration tank bottom is provided with heating resistor, in the time that liquid level arrives preset value, starting heating resistor heats concentrated pot liquid, heavy metal chloride solution can be concentrated on the one hand, and concentration tank bottom is inclined-plane, the slurries outlet that its bottom arranges coordinates sludge pump the dope after concentrated can be discharged to system, the slurries of discharge system are high density heavy metal chloride pregnant solution, be very suitable for the secondary recovery utilization of heavy metal, and another convenient volatile leacheate can volatilization, and carry out condensing tube condensation recovery, and the leacheate after reclaiming is collected in leacheate storage tank, can effectively reduce the waste of reagent, improve service efficiency.
In the present invention, a kind of method of high-concentration heavy metal waste water fast processing pulse enrichment is also provided, this method is based on high-concentration heavy metal waste water fast processing pulse enriching apparatus of the present invention, and its step comprises:
1, the sewage with heavy metal ion is carried out to preliminary decontamination processing, utilizes the solid impurity in screen cloth or filter sewage, by filter after sewage collecting in wastewater disposal basin;
2, open valve and the waste water pump in waste water circulation system, waste water circulation system works, by in the sewage suction filling tank in wastewater disposal basin, filling tank is switched on simultaneously, when energising, Graphite Electrodes rod is negative electrode, metal electrode lines is anode, and auxiliary electric field makes iron carbon Nano filling surface band negative electricity, makes the metal ion of nominal price be enriched in iron carbon Nano filling surface under the effect of electric field and surface group;
3, close waste water pump and related valve, switch again the positive and negative electrode of direct supply, make Graphite Electrodes rod for anode, metal electrode lines is negative electrode, simultaneously, open the valve between leacheate peristaltic pump and leacheate storage tank and filling tank, the leacheate in leacheate storage tank is passed in filling tank through leacheate peristaltic pump;
4, in filling tank, react after 5 ~ 10 minutes, open the valve between filling tank and concentration tank, by concentrated solution after treatment in filling tank by discharging from filling tank, concentrated solution after treatment coordinates sludge pump to isolate high density heavy metal chloride pregnant solution slurries by the slurries outlet arranging from concentration tank bottom after heating resistor energising heating in concentration tank, and the leacheate that has neither part nor lot in reaction volatilizees and passes into prolong via concentration tank upper pipe under heating condition, and be back to leacheate storage tank from condensing tube condensation, complete a working cycle.
Advantage of the present invention and beneficial effect are: the present invention is as a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus, the product finally obtaining is the metal chloride of high density and purifies waste water, can not produce other products, do not have the eliminating of secondary pollutant simultaneously yet, meet the requirement of Environmental Design, its advantage can be expressed as the following aspects:
(1), this device Modified Iron carbon Nano filling has very large specific surface area and plot ratio, has the ability that better stores absorption than conventional sorbent material, improved adsorption efficiency;
(2) the iron carbon Nano filling, after the modification of this device has very high conductivity, can serve as the electrodeposition of inertia and dissolve heavy metal ion, and self being not easy oxidizedly, has improved work-ing life;
(3) what the method for the Modified Iron carbon adsorbent that, this device uses was used is the Modified Iron carbon adsorbent that original position absorbing and reducing is prepared in the method for oxidation, while processing, waste water is entered by filling tank bottom simultaneously, flow out upper end, effectively avoid the situation of the ditch flow short-circuit of iron-carbon micro-electrolysis filler tank, prevented the drawback of the unprocessed direct short-circuit outflow of waste water packing tower;
(4), this device coordinates the technology of the auxiliary heavy metal ion deposition of electric field, utilize heavy metal ion can be in the situation that electric field exists to movable cathode and progressively deposit to Modified Iron carbon adsorbent surface, accelerated speed of reaction and effectively shortened the time of reacting;
(5) effective constituent of the leacheate that, this device uses is hydrochloric acid, utilize its volatile feature, design concentrated solution storage tank, use thermal separation heavy metal chloride and hydrochloric acid effective constituent, do not need miscellaneous film processing, the technique means such as extraction treatment, only need slush pump can facilitate, reclaim cheaply the heavy metal composition after concentrating after concentrating.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the syndeton schematic diagram of filling tank of the present invention.
Fig. 3 is the internal structure schematic diagram of filling tank of the present invention.
Fig. 4 is the internal charge distribution plan of filling tank of the present invention while carrying out sewage disposal.
Number in the figure: 1-filling tank, 2-concentration tank, 3-leacheate storage tank, 4-direct supply, 5-prolong, 6-leacheate peristaltic pump, 7-waste water pump, 8-sludge pump, 9-the first valve, 10-the second valve, 11-the 3rd valve, 12-the 4th valve, 13-the 5th valve, 14-the 6th valve, 15 the 7th valves, 16-water intake, the 17-water outlet of purifying waste water, the import of 18-leacheate, liquid water outlet after 19-drip washing, 20-metal electrode lines, 21-the first wire, 22-the second wire, 23-iron carbon Nano filling, 24-Graphite Electrodes rod, 25-filling tank outer wall.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to the preferred embodiment of a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus of Fig. 1 ~ Fig. 4, in the present embodiment, waste water containing heavy metal is squeezed in filling tank 1 through filling tank 1 bottom inlet by waste water pump 7 by the first valve 9, in filling tank 1, discharges through the 6th valve 14 through iron carbon Nano filling 23.
While passing through iron carbon Nano filling 23 containing the waste water of heavy metal, it is the adsorption effect that strengthens carbon nano adsorption filler, use direct supply 4 to switch on, when energising, Graphite Electrodes rod 24 is negative electrode, metal electrode lines 20 is anode, make the iron carbon Nano filling 23 of packing layer electronegative, cause a large amount of unbound electron enrichment in its surface, be conducive to the heavy metal deposition in waste water; Filling tank 1 outer wall is enclosed with metal electrode lines 20, make its positively charged by direct supply 4, make the packing layer of filling tank 1 among radiated electric field, accelerate heavy metal ion toward the 23 internal surface diffusions of iron carbon Nano filling, reduced the chemical reaction rate of the effect of intraparticle diffusion in filling tank 1.
In filling tank 1 the iron carbon Nano filling 23 of packing layer adsorb saturated after, close the 4th valve 12, the 6th valve 14 and waste water pump 7 enter filler activator and heavy metal reclaimer: the positive and negative electrode that switches direct supply 4, oppositely dissolve surperficial heavy metal, open simultaneously leacheate peristaltic pump 6 by the acid solution in leacheate storage tank 3 by squeezing into filling tank 1 through the second valve 10, flow in concentration tank 2 through the 5th valve 13 again, concentration tank 2 liquid levels during to heating setpoint value direct supply 4 start for the heating resistor power supply in concentration tank 2, heavy metal chloride to be separated with volatile hydrochloric acid leacheate, leacheate is after prolong 5, condensate flow again reclaims to leacheate storage tank 3, to reduce leacheate waste.And concentration tank 2 liquid levels are reduced to liquid feeding set(ting)value post-heating resistance power supply and close, open sludge pump 8 dope is got to system through the 3rd valve 11, obtain high density heavy metal chloride pregnant solution slurries.
In the present embodiment, the product finally obtaining is the metal chloride slurries of high density and purifies waste water, can not produce other products, do not have the discharge of secondary pollutant simultaneously yet, heavy metal-containing waste water directly can be processed into purifying waste water of can directly discharging on the one hand, meet the requirement of Environmental Design, on the other hand, can carry out the recovery of heavy metal for the high density heavy metal chloride pregnant solution slurries that obtain after reclaiming and refine, again to create economic worth.Thereby, the present invention be a kind of rationally, the improvement heavy metal contamination of cheap, efficient, safety, environmental protection reclaim the system of valuable metal ions.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. a high-concentration heavy metal waste water fast processing pulse enriching apparatus, comprises filling tank, it is characterized in that, is connected with waste water circulation system and the leacheate recycle system on described filling tank,
On the outer wall of described filling tank, be wound with metal electrode lines, and packing layer is set in filling tank, in this packing layer, uniform filling has magnetic iron carbon Nano filling, is fitted with a root graphite electrode rod in described iron carbon Nano filling;
Described waste water circulation system comprises waste water pump and connecting tube, and described connecting tube is connected respectively to the import of one group of filling tank both sides and the upper open circuit that forms of outlet, and waste water pump is connected on the pipeline of inlet section;
The described leacheate recycle system comprises leacheate peristaltic pump, leacheate storage tank, prolong and concentration tank, described leacheate peristaltic pump, leacheate storage tank, prolong, concentration tank are connected on another group import and the upper closed loop that forms of outlet of filling tank successively, described concentration tank bottom is inclined-plane, the upper domatic side on inclined-plane is provided with heating resistor, and Caused by Sloping Surfaces bottom is provided with the outlet of a slurries outlet connection metal pregnant solution;
In addition, in described fast processing pulse enriching apparatus, be also provided with an at least direct supply with two groups of output interfaces, Graphite Electrodes rod and the metal electrode lines of one group of bonding pad tank in two groups of output interfaces, other one group of heating resistor connecting in concentration tank.
2. a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus according to claim 1, it is characterized in that, the rule of the one group of output interface being connected with Graphite Electrodes rod, the metal electrode lines of filling tank in two groups of output interfaces of described direct supply in the time that electric power is exported is: while processing waste water, Graphite Electrodes rod is negative electrode, and metal electrode lines is anode; When metal is reclaimed in activation, Graphite Electrodes rod is anode, and metal electrode lines is negative electrode.
3. a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus according to claim 1, is characterized in that, described filling tank tank body adopts to be made soda acid inertia and the material that do not possess adsorptivity.
4. a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus according to claim 1, is characterized in that, connection wastewater disposal basin of two pipelines that described waste water circulation system is stretched out from filling tank both sides, and another root connects purification liquid pool.
5. a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus according to claim 1, is characterized in that, on described each connecting pipeline, is provided with check valve, and this check valve adopts soda acid inertia and the material that do not possess adsorptivity are made.
6. a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus according to claim 1, is characterized in that, described direct supply can and can carry out positive and negative electrode switching for any direct current of connected provide≤80V of filling tank device electrode.
7. a kind of high-concentration heavy metal waste water fast processing pulse enriching apparatus according to claim 1, is characterized in that, on the pipeline between slurries outlet and the outlet of metal enrichment liquid of described concentration tank bottom, is connected with a sludge pump.
8. a method for high-concentration heavy metal waste water fast processing pulse enrichment, is characterized in that, concrete steps comprise:
1. the sewage with heavy metal ion is carried out to preliminary decontamination processing, utilizes the solid impurity in screen cloth or filter sewage, by filter after sewage collecting in wastewater disposal basin;
2. open valve and waste water pump in waste water circulation system, waste water circulation system works, by in the sewage suction filling tank in wastewater disposal basin, filling tank is switched on simultaneously, when energising, Graphite Electrodes rod is negative electrode, metal electrode lines is anode, and auxiliary electric field makes iron carbon Nano filling surface band negative electricity, makes the metal ion of nominal price be enriched in iron carbon Nano filling surface under the effect of electric field and surface group;
3. close waste water pump and related valve, switch again the positive and negative electrode of direct supply, make Graphite Electrodes rod for anode, metal electrode lines is negative electrode, simultaneously, open the valve between leacheate peristaltic pump and leacheate storage tank and filling tank, the leacheate in leacheate storage tank is passed in filling tank through leacheate peristaltic pump;
4. after reacting in filling tank, open the valve between filling tank and concentration tank, by concentrated solution after treatment in filling tank by discharging from filling tank, concentrated solution after treatment coordinates sludge pump to isolate high density heavy metal chloride pregnant solution slurries by the slurries outlet from concentration tank bottom after heating resistor energising heating in concentration tank, and the leacheate that has neither part nor lot in reaction volatilizees and passes into prolong via concentration tank upper pipe under heating condition, and be back to leacheate storage tank from condensing tube condensation, complete a working cycle.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111252843A (en) * | 2020-01-20 | 2020-06-09 | 中南林业科技大学 | Hypha filter membrane device for selectively treating complex wastewater and treatment process |
| CN112964509A (en) * | 2021-03-17 | 2021-06-15 | 济南市环境研究院 | Natural water sample in-situ suction filtration and solid phase extraction integrated operation system and operation method thereof |
| CN113772773A (en) * | 2021-10-14 | 2021-12-10 | 中国矿业大学 | Method and device for purifying heavy metal sewage gradually in radial direction by coupling of heat, electricity and membrane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109133480B (en) * | 2018-09-17 | 2019-10-08 | 中南林业科技大学 | A kind of more group material adverse current adsorption desorption device and methods being enriched with high arsenic waste solution |
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