CN204689789U - A kind of short distance membrane separation system of plumbous Zn Cr coating smelting wastewater - Google Patents
A kind of short distance membrane separation system of plumbous Zn Cr coating smelting wastewater Download PDFInfo
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- CN204689789U CN204689789U CN201520377384.9U CN201520377384U CN204689789U CN 204689789 U CN204689789 U CN 204689789U CN 201520377384 U CN201520377384 U CN 201520377384U CN 204689789 U CN204689789 U CN 204689789U
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Abstract
A kind of short distance membrane separation system of plumbous Zn Cr coating smelting wastewater, first reaction tank one end is connected with raw wastewater equalizing tank by corrosion resistant self-sucking pump, the first reaction tank the other end is connected with second reaction tank one end, the second reaction tank the other end is connected with circulation concentration basin, circulation concentration basin is connected by the front end of recycle pump with tubular membrane tripping device, the clear water output of tubular membrane tripping device end is connected with neutralization tank, and the dope outlet of tubular membrane tripping device end is connected with circulation concentration basin; Be connected with sludge dehydration device by sludge pump bottom circulation concentration basin, sludge dehydration device is connected with raw wastewater equalizing tank; Reaction stirrer is provided with in the first described reaction tank and the second reaction tank; First reaction tank and neutralization tank are provided with sour throwing device; First reaction tank is connected with the second reaction tank throws alkali device; Second reaction tank is also provided with bodied ferric sulfate throwing device and oxygenant throwing device.The utility model treatment scheme is short, and energy consumption is low, invests little, and suitability is good.
Description
Technical field
The utility model belongs to technical field of waste water processing, is specifically related to a kind of short distance membrane separation system of plumbous Zn Cr coating smelting wastewater.
Background technology
The waste water of plumbous Zn Cr coating smelting industry discharge contains the pollutent that lead, zinc, copper, cadmium, arsenic etc. have certain toxicity, being directly discharged into water body, causing serious pollution by environment if do not processed.Because heavy metal can not be degraded in the environment, various ligand binding easily and in environment, make it move, diffusibility strengthen, biological magnification is produced again by plant absorption, thus pass through the health of food chain harm humans, therefore heavy metal contamination has very large hazardness, and national heavy metal Environmental capacity dynamics is increasing.According to the requirement of country's " heavy metal contamination integrated control " 12 " planning " and " Guangxi heavy metal contamination integrated control " 12 " planning ", lead-zinc smelting area, Guangxi Zhuang Autonomous Region is listed in heavy metal contamination emphasis prevention and control district, wastewater discharge standard, from " plumbous Zn Cr coating pollutant emission standard " GB25466-2010, brings up to stricter " water environment quality standard " (GB3838-2002) III class water quality standard.Along with the raising of emission standard, single and traditional treatment process can not ensure up to standard, therefore most enterprise adopts multiple treatment process combination treatment up to standard to guarantee, generally adopt traditional chemical precipitation, filter as pre-treatment, ion-exchange and film process are as checking on.
Ion exchange process has higher requirement to the high price foreign ion of intaking, organism and suspended substance, and conventional chemical precipitation treatment process is difficult to reach, and often needs to add sand filtration, charcoal absorption, even micro-filtration, ultrafiltration, such processing technological flow is longer, and equipment is more, and energy consumption is high; Ion exchange treatment methods needs regularly to ion exchange resin regeneration, and a large amount of acid of regenerative process consumption, alkali, ion exchange resin is shorter for work-ing life, and need regular replenishment or replacing, working cost is higher.
Early stage membrane separating method process heavy metal wastewater thereby, based on ultrafiltration, nanofiltration, reverse osmosis, energy consumption is larger, high to the water quality requirement of feed water by reverse osmosis, general on the basis of conventional chemical precipitation process, increase the pretreatment process such as quartz sand filtration, charcoal absorption, micro-filtration, treatment scheme is longer; Equipment is more simultaneously, and repeatedly pressurize, energy consumption is larger; Micro-filtration, ultra-filtration membrane, reverse osmosis membrane are not long for work-ing life, general about 3 years.
Utility model content
Technical problem to be solved in the utility model is the short distance membrane separation system providing a kind of smelting wastewater, under the noxious pollutants such as the arsenic after guaranteeing smelting wastewater process in water outlet, copper, lead, zinc, cadmium reach the prerequisite of " water environment quality standard " (GB3838-2002) III class water quality standard, further shortening treatment scheme, reaches energy-saving and cost-reducing, reduces the object of investment.
The utility model solves the problems of the technologies described above taked technical scheme: a kind of short distance membrane separation system of plumbous Zn Cr coating smelting wastewater, comprise the first reaction tank, second reaction tank, circulation concentration basin, tubular membrane tripping device, neutralization tank and sludge dehydration device, first reaction tank one end is connected with raw wastewater equalizing tank by corrosion resistant self-sucking pump, the first reaction tank the other end is connected with second reaction tank one end, the second reaction tank the other end is connected with circulation concentration basin, circulation concentration basin is connected by the front end of recycle pump with tubular membrane tripping device, the clear water output of tubular membrane tripping device end is connected with neutralization tank, the dope outlet of tubular membrane tripping device end is connected with circulation concentration basin, be connected with sludge dehydration device by sludge pump bottom circulation concentration basin, sludge dehydration device is connected with raw wastewater equalizing tank,
Reaction stirrer is provided with in the first described reaction tank and the second reaction tank; First reaction tank and neutralization tank are provided with sour throwing device; First reaction tank is connected with the second reaction tank throws alkali device; Second reaction tank is also provided with bodied ferric sulfate throwing device and oxygenant throwing device.
The first described reaction tank, the second reaction tank and neutralization tank are also provided with pH controller, the first reaction tank and the second reaction tank are also provided with ORP controller.
Described tubular membrane tripping device is made up of PVDF material, and aperture is 0.01-0.1 micron, adopts cross-flow filtration.
Described tubular membrane tripping device is connected with washing unit.
When utilizing the utility model to carry out smelting wastewater process, waste water is transported to the first reaction tank through corrosion resistant self-sucking pump, adds sodium sulphite and caustic soda, the heavy metal ion in waste water is precipitated; Then enter the second reaction tank, add bodied ferric sulfate, determine to add acid or alkali simultaneously according to former water pH value, adjust ph is to 9-10, and the noxious pollutant in precipitation, flocculation, absorption waste water, removes unnecessary sodium sulphite simultaneously; When low price arsenic being oxidized to high price arsenic containing adding oxygenant during low price arsenic, be obtained by reacting the less precipitated ferric arsenate of solubility product with iron ion; Reacted mixed solution enters circulation concentration basin, directly sends into tubular membrane tripping device, obtain clear water by recycle pump; Particle in mixed solution is retained down and returns circulation concentration basin circular treatment with dope; When mixed solution be concentrated to solid content reach 2-5% time, be transported to sludge dehydration device by sludge pump, dewatered sludge deliver to Tailings Dam dispose, dehydration filtrate return equalizing tank with raw wastewater mixing after recycling processing; The clear water obtained enters neutralization tank, then adds acid and regulate clear water pH value to be 6-9, below the limit value that the noxious pollutant content in clear water is reached surface water three class standard that GB3838 specifies specifies.Sodium sulphite dosage and oxygenant dosage are controlled by ORP controller, and the dosage of acid or alkali is controlled by pH controller.When described tubular membrane tripping device flux drops to below design flux, adopt hydrochloric acid and clorox to carry out matting, make tubular membrane tripping device recover flux.
Short distance membrane separation system described in the utility model, compare with traditional precipitation-sand filtration-carbon filter-micro-filtration-reverse osmosis system, there is the advantage that treatment scheme is short, energy consumption is low, and do not retain soluble solid material, there is not the accumulation problem of inorganic salt, the concentrated solution be separated is only through conventional sludge condensation, filter-press dehydration process, and the concentrated solution of conventional reverse osmosis needs the very high evaporation of power consumption to subtract appearance decrement.With conventional chemical precipitation, that filtering system compares floor space is few, and working cost is low, can access existing biological treatment of waste water system easily, and the mark transformation of carrying for the smelting wastewater process of existing plumbous Zn Cr coating has great importance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the short distance membrane separation system of plumbous Zn Cr coating smelting wastewater described in the utility model.
Wherein, Reference numeral is: S-01, the first reaction tank; S-02, the second reaction tank; S-03, circulation concentration basin; S-04, sludge dehydration device; S-05, neutralization tank; S-06, reaction stirrer; S-07, sour throwing device; S-09, bodied ferric sulfate throwing device; S-10, oxygenant throwing device; S-11, recycle pump; S-12, tubular membrane tripping device; S-13, throwing alkali device; S-14, sludge pump.
Embodiment
Below by composition graphs 1 and embodiment, the technical solution of the utility model and beneficial effect are described further.
Acid in embodiment is added by sour throwing device S-07, and sodium sulphite and alkali add by throwing alkali device S-13, and bodied ferric sulfate is added by bodied ferric sulfate throwing device S-09, and oxygenant is added by oxygenant throwing device S-10; The first described reaction tank S-01 and the second reaction tank S-02 is by reaction stirrer S-06 stirring reaction.
Embodiment 1: plumbous Zn Cr coating smelting wastewater process example
The process water yield: 600m
3/ d
Certain plumbous antimony metal smelting enterprise discharges smelting wastewater every day and contains the pollutent that lead, zinc, arsenic, cadmium etc. exceed emission standard, and waste water slant acidity, pH value 4-7, every day, quantity discharged was about 600m
3/ d, according to environmental administration's requirement, needs process to " water environment quality standard " (GB3838-2002) III class water quality standard.
Plumbous Zn Cr coating smelting wastewater enters equalizing tank, entrance adds presetting pH to the 6-7 of alkali, then rise to the first reaction tank S-01 by corrosion resistant self-sucking pump, add sodium sulphite and caustic soda, make the heavy metal ion reactions such as the copper in waste water, lead, zinc, cadmium form chemical precipitation particle.Reacted mixed solution enters the second reaction tank S-02, adds appropriate bodied ferric sulfate, and adjust ph, to about 9-10, promotes that the noxious pollutant such as arsenic, copper, lead, zinc, cadmium in waste water forms precipitation further; Remove unnecessary sodium sulphite simultaneously.Add clorox simultaneously and low price arsenic is oxidized to high price arsenic, be obtained by reacting the less precipitated ferric arsenate of solubility product with iron ion.
Mixed solution after the second reaction tank S-02 enters circulation concentration basin S-03, and the tubular membrane tripping device S-12 directly sending into the aperture 0.01-0.1 micron that a kind of PVDF material is made by recycle pump S-11, obtains clear water; Particle in mixed solution is retained down and returns circulation concentration basin S-03 circular treatment with dope.When mixed solution be concentrated to solid content reach about 2-5% time, be transported to sludge condensation, dewatering system by sludge pump S-14, dewatered sludge is disposed by regulation, and filtrate returns equalizing tank with row relax again after raw wastewater mixing.
The clear water that membrane sepn obtains enters neutralization tank S-05, add acid again, regulate clear water pH value within the scope of 8-9, the noxious pollutant content such as the arsenic in clear water, copper, lead, zinc, cadmium can be reduced to below the limit value that surface water three class standard that GB3838 specifies specifies, reach the emission request of environmental administration.
Table 1: the main units of embodiment 1 and major equipment (total installed capacity power 90KW)
The treatment effect of embodiment 1 pair of waste water is as shown in table 2.
Table 2: the treatment effect of embodiment 1
Note: ND represents the minimum detectability of this analytical results lower than method.
Claims (4)
1. the short distance membrane separation system of a plumbous Zn Cr coating smelting wastewater, it is characterized in that, comprise the first reaction tank, second reaction tank, circulation concentration basin, tubular membrane tripping device, neutralization tank and sludge dehydration device, first reaction tank one end is connected with raw wastewater equalizing tank by corrosion resistant self-sucking pump, the first reaction tank the other end is connected with second reaction tank one end, the second reaction tank the other end is connected with circulation concentration basin, circulation concentration basin is connected by the front end of recycle pump with tubular membrane tripping device, the clear water output of tubular membrane tripping device end is connected with neutralization tank, the dope outlet of tubular membrane tripping device end is connected with circulation concentration basin, be connected with sludge dehydration device by sludge pump bottom circulation concentration basin, sludge dehydration device is connected with raw wastewater equalizing tank,
Reaction stirrer is provided with in the first described reaction tank and the second reaction tank; First reaction tank and neutralization tank are provided with sour throwing device; First reaction tank is connected with the second reaction tank throws alkali device; Second reaction tank is also provided with bodied ferric sulfate throwing device and oxygenant throwing device.
2. the short distance membrane separation system of plumbous Zn Cr coating smelting wastewater according to claim 1, it is characterized in that, the first described reaction tank, the second reaction tank and neutralization tank are also provided with pH controller, the first reaction tank and the second reaction tank are also provided with ORP controller.
3. the short distance membrane separation system of plumbous Zn Cr coating smelting wastewater according to claim 1, is characterized in that, described tubular membrane tripping device is made up of PVDF material, and aperture is 0.01-0.1 micron, adopts cross-flow filtration.
4. the short distance membrane separation system of plumbous Zn Cr coating smelting wastewater according to claim 1, is characterized in that, described tubular membrane tripping device is connected with washing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520377384.9U CN204689789U (en) | 2015-06-03 | 2015-06-03 | A kind of short distance membrane separation system of plumbous Zn Cr coating smelting wastewater |
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| CN201520377384.9U CN204689789U (en) | 2015-06-03 | 2015-06-03 | A kind of short distance membrane separation system of plumbous Zn Cr coating smelting wastewater |
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| CN204689789U true CN204689789U (en) | 2015-10-07 |
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Address after: 530000 Building 903, No. 1, Tang Headquarters, 21 Pingle Avenue, Liangqing District, Nanning City, Guangxi Zhuang Autonomous Region Patentee after: Guirun Environmental Science and Technology Co., Ltd. Address before: 530200 Room 1648 Xinlihua Commercial Building, No. 1 Wuxiang Avenue, Liangqing District, Nanning City, Guangxi Zhuang Autonomous Region Patentee before: NANNING GUIRUN ENVIRONMENT ENGINEERING CO., LTD. |