CN104071925A - Zero-drainage treatment system and zero-drainage treatment method for nickel plating wastewater in steel workshop - Google Patents
Zero-drainage treatment system and zero-drainage treatment method for nickel plating wastewater in steel workshop Download PDFInfo
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Abstract
The invention belongs to the technical field of sewage treatment systems, and particularly relates to a zero-drainage treatment system for nickel plating wastewater in a steel workshop. The zero-drainage treatment system comprises a collection aeration water tank, a reaction aeration water tank, a concentration water tank, a tubular membrane filtration system, an active carbon filter, a retracement aeration water tank, a security filter, a first-stage RO (reverse osmosis) system, a concentrated water tank, a second-stage RO system, a fresh water tank, a water outlet pump and a plate-and-frame filter press, wherein the reaction aeration water tank is further connected with an alkalifying device, and the retracement aeration water tank is further connected with an acidifying device. Compared with the prior art, the zero-drainage treatment system disclosed by the invention is capable of enabling the wastewater drained from the steel workshop to achieve zero-drainage standards, so as to avoid harm to environment and human health, and enabling the nickel plating wastewater of the steel workshop to be effectively recycled. The invention further discloses a method for using the system for carrying out zero-drainage treatment on the nickel plating wastewater of the steel workshop.
Description
Technical field
The invention belongs to Sewage treatment systems technical field, particularly zero-discharge treatment system and the method for the nickel-plating waste water in a kind of iron and steel workshop.
Background technology
Technique in steel surface nickel plating mainly comprises three steps, the one, and pre-treating technology, is mainly used in clean and activated metal surface, and it commonly uses brightening agent, complexing agent and inhibiter etc.; The 2nd, electronickelling technique, the electroplating solution in electroplating process is mainly comprised of main salt, complexing agent, conducting salt, buffer reagent, anode activator and additive etc., and wherein main salt is generally single nickel salt; The 3rd, aftertreatment technology, mainly comprises and cleaning and dry work.In whole production process, the workpiece after pretreatment stage and nickel plating all needs water to rinse plating piece, forms thus nickel-plating waste water.
Nickel in nickel-plating waste water is a kind of carcinogenic substance, if this nickel-plating waste water does not add, does not just process discharge arbitrarily, not only can cause the wasting of resources, also can cause serious harm to environmental and human health impacts.
In addition, water is as a kind of more and more rare resource, if the nickel-plating waste water in iron and steel workshop can be carried out to zero discharge treatment, can recycling, and that can make certain contribution for environmental protection cause undoubtedly.
In view of this, necessary zero-discharge treatment system and the method that the nickel-plating waste water in a kind of iron and steel workshop is provided, so that the nickel-plating waste water that discharge in iron and steel workshop can reach zero release standard, environmental and human health impacts is worked the mischief avoiding, and make the nickel-plating waste water in iron and steel workshop can be efficiently recovered utilization.
Summary of the invention
One of object of the present invention is: for the deficiencies in the prior art, and provide the zero-discharge treatment system of the nickel-plating waste water in a kind of iron and steel workshop, so that the nickel-plating waste water that discharge in iron and steel workshop can reach zero release standard, environmental and human health impacts is worked the mischief avoiding, and make the nickel-plating waste water in iron and steel workshop can be efficiently recovered utilization.
To achieve these goals, the present invention adopts following technical scheme:
The zero-discharge treatment system of the nickel-plating waste water in a kind of iron and steel workshop, comprise and collect aeration water tank, reaction aeration water tank, concentrated water tank, tubular membrane filtering system, activated charcoal filter, readjustment aeration water tank, cartridge filter, one-level RO system, dense water tank, secondary RO system, fresh-water tank, go out water pump and plate-and-frame filter press, the outlet of described collection aeration water tank is connected with the entrance of described reaction aeration water tank, the outlet of described reaction aeration water tank is connected with the waterwater entrance of described concentrated water tank, the liquid exit of described concentrated water tank is connected with the entrance of described tubular membrane filtering system, the solid outlet of described concentrated water tank is connected with the entrance of described plate-and-frame filter press, the filtrate outlet of described plate-and-frame filter press is connected with the entrance of described collection aeration water tank, the product water out of described tubular membrane filtering system is connected with described activated charcoal filter, the dense water out of described tubular membrane filtering system is connected with the dense water inlet of described concentrated water tank, the outlet of described activated charcoal filter is connected with the entrance of described readjustment aeration water tank, the outlet of described readjustment aeration water tank is connected with the entrance of described cartridge filter, the outlet of described cartridge filter is connected with the entrance of described one-level RO system by one-level high-pressure pump, the dense water out of described one-level RO system is connected with the entrance of described dense water tank, the outlet of described dense water tank is connected with the entrance of described secondary RO system by secondary high-pressure pump, the dense water out of described secondary RO system is connected with the entrance of described collection aeration water tank, described reaction aeration water tank is also connected with adder-subtractor, described readjustment aeration water tank is also connected with acid adding device.
As a kind of improvement of the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, described treatment system also comprises fresh-water tank, and the product water out of the product water out of described one-level RO system and described secondary RO system is all connected with the entrance of described fresh-water tank.
A kind of improvement as the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, is provided with the first lift pump between described collection aeration water tank and described reaction aeration water tank.
A kind of improvement as the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, is provided with the second lift pump between described reaction aeration water tank and the waterwater entrance of described concentrated water tank.
A kind of improvement as the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, is provided with recycle pump between the liquid exit of described concentrated water tank and described tubular membrane filtering system.
A kind of improvement as the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, is provided with sludge press filtration pump between the solid outlet of described concentrated water tank and the entrance of described plate-and-frame filter press.
A kind of improvement as the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, described tubular membrane filtering system comprises casing, millipore filtration, water washing device and medicine cleaning device, and described millipore filtration, described water washing device and described medicine cleaning device are all arranged in described casing.
A kind of improvement as the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, is provided with washing unit in described one-level RO system and described secondary RO system.
As a kind of improvement of the zero-discharge treatment system of the nickel-plating waste water in iron and steel of the present invention workshop, described treatment system also comprises PLC Controlling System and the touch-screen being connected with described PLC Controlling System.
Another object of the present invention is to provide a kind of and utilizes system of the present invention the nickel-plating waste water in iron and steel workshop to be carried out to the method for zero discharge treatment, and it comprises the following steps:
The first step, waste water is first collected into collects buffer memory in aeration water tank, then squeezes in reaction aeration water tank, then from adder-subtractor, in reaction aeration water tank, adds alkaline solution, makes to generate solid precipitation after pollutent in waste water and alkali reaction;
Second step, the waste water that comprises this solid precipitation is driven in concentrated water tank, in concentrated water tank, solid particulate matter precipitates, make the waste water in it be divided into supernatant liquid and lower sediment, the upper strata stillness of night wherein squeezes in tubular membrane filtering system, and lower sediment is depressed into plate-and-frame filter press and carries out press filtration, mud after press filtration is transported outward away, and the filtrate of formation enters collects aeration water tank;
The 3rd step, supernatant liquid is constantly concentrated in tubular membrane filtering system, the dense water that makes to contain solid precipitation is with to produce water separated, concentrate recirculation is to concentrated water tank, produce water and after activated charcoal filter, enter into readjustment aeration water tank, then from acid adding device, to readjustment aeration water tank, add acid solution, regulate pH to enter cartridge filter to neutrality;
The 4th step, the water flowing out from cartridge filter pumps in one-level RO system by one-level high-pressure pump, and from one-level RO system, product water out can directly utilize, and dense water enters into dense water tank;
The 5th step, the second high-pressure pump pumps into the water in dense water tank in secondary RO system, and from secondary RO system, product water out can directly utilize, and dense water is back to be collected in aeration water tank.
With respect to prior art, the present invention first by adding alkali to carry out Chemical Pretreatment in waste water, make nickel, copper, the metal ions such as zinc become precipitation, then by filtering the waste water through Chemical Pretreatment by tubular membrane filtering system, precipitating sludge is transported outward away after plate-and-frame filter press, thereby can remove well the nickel in the nickel-plating waste water in iron and steel workshop, copper, the metal ions such as zinc, and in whole filtration procedure without separately establishing again settling bowl, also without using flocculation agent (PAM), water quality after filtering is limpid, seldom carry fine suspended substance secretly, without sand charcoal and ultrafiltration, just the SDI in waste water can be down between 1-3, therefore can accomplish qualified discharge.In addition, the millipore filtration in tubular membrane filtering system can bear the cleaning of acidity, alkalescence, bleaching and oxidation medicament, and therefore, tubular membrane filtering system has longer work-ing life, and be 3 ~ 5 years work-ing life conventionally.
And the activated charcoal filter in the present invention can reduce COD, absorption colloid and the particulate matter impurity in water, thereby further removes the material that should not discharge in waste water, makes the nickel-plating waste water giving off from iron and steel workshop become standard compliant water.
After readjustment aeration water tank, cartridge filter is set, one-level RO system, dense water tank and secondary RO system, can realize the zero release of the nickel-plating waste water in iron and steel workshop, this be because, cartridge filter can be removed the particulate matter impurity of leaving in water, to guarantee the normal operation of one-level RO system and secondary RO system, one-level RO system and secondary RO system are utilized reverse osmosis method, can be by solute (ion by reverse osmosis membrane, molecule) separated with water, the coupling of two-stage RO system can be the nickel of leaving in the waste water after tubular membrane filtering system is processed, the metal ions such as copper are removed, thereby realize zero release.
With traditional Ion Exchange Resin Phase ratio, RO system tool has the following advantages: do not need acid, alkali regeneration, thereby can save a large amount of acid, alkali and water for cleaning, greatly reduce labour intensity, and without the discharge of spent acid waste lye, therefore can guarantee preferably cleaner production; Can accomplish that long-time continuous supplies water; Floor space minimum (less than traditional technology 1/4), simple to operate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of tubular membrane filtering system in the present invention.
Embodiment
Below in conjunction with embodiment and Figure of description, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1, the zero-discharge treatment system of the nickel-plating waste water in a kind of iron and steel provided by the invention workshop, comprise and collect aeration water tank 1, reaction aeration water tank 2, concentrated water tank 3, tubular membrane filtering system 4, activated charcoal filter 5, readjustment aeration water tank 6, cartridge filter 7, one-level RO system 8, dense water tank 9, secondary RO system 10 and plate-and-frame filter press 11, the outlet of collecting aeration water tank 1 is connected with the entrance of reaction aeration water tank 2, the outlet of reaction aeration water tank 2 is connected with the waterwater entrance of concentrated water tank 3, the water out of concentrated water tank 3 is connected with the entrance of tubular membrane filtering system 4, the solid outlet of concentrated water tank 3 is connected with the entrance of plate-and-frame filter press 11, the filtrate outlet of plate-and-frame filter press 11 is connected with the entrance of collecting aeration water tank 1, the product water out of tubular membrane filtering system 4 is connected with activated charcoal filter 5, the dense water out of tubular membrane filtering system 4 is connected with the dense water inlet of concentrated water tank 3, the outlet of activated charcoal filter 5 is connected with the entrance of readjustment aeration water tank 6, the outlet of readjustment aeration water tank 6 is connected with the entrance of cartridge filter 7, the outlet of cartridge filter 7 is connected with the entrance of one-level RO system 8 by one-level high-pressure pump 12, the dense water out of one-level RO system 8 is connected with the entrance of dense water tank 9, the outlet of dense water tank 9 is connected with the entrance of secondary RO system 10 by secondary high-pressure pump 13, the dense water out of secondary RO system 10 is connected with 1 entrance of collecting aeration water tank, reaction aeration water tank 2 is also connected with adder-subtractor 21, readjustment aeration water tank 6 is also connected with acid adding device 14.
Wherein, cartridge filter 7 is again precise filtering device, and its inner dress PP is cotton, and the hole of PP cotton is 5 μ m left and right, can remove small suspended substance, bacterium and other impurity etc. in water, makes water quality reach the requirement of reverse osmosis membrane.
Wherein, treatment system also comprises fresh-water tank 15, and the product water out of the product water out of one-level RO system 8 and secondary RO system 10 is all connected with the entrance of fresh-water tank 15.Fresh-water tank 15 is for processing clean water is stored, and when needs reuse is during to workshop, only need to use out water pump 20 to be pumped to the place that needs water in workshop.
Collect between aeration water tank 1 and reaction aeration water tank 2 and be provided with the first lift pump 16, for waste water is pumped into reaction aeration water tank 2 from collecting aeration water tank 1.
Between reaction aeration water tank 2 and the waterwater entrance of concentrated water tank 3, be provided with the second lift pump 17, for the waste water with after alkali reaction is pumped into concentrate water tank 3 and carries out stratification from react aeration water tank 2, solid precipitation and supernatant liquid separated.
Between the liquid exit of concentrated water tank 3 and tubular membrane filtering system 4, be provided with recycle pump 18, for the supernatant liquid of concentrated water tank 3 is pumped into, in tubular membrane filtering system 4, carry out micro-filtration.Concentrated water tank 3 can also precipitate the solid precipitation in the waste water refluxing through tubular membrane filtering system 4.
Between the concentrated solid outlet of water tank 3 and the entrance of plate-and-frame filter press 11, be provided with sludge press filtration pump 19, for the solid precipitation that concentrates water tank 3 is pumped into, in plate-and-frame filter press 11, carry out plate pressure, thereby filter mud and filtrate are separated.
As shown in Figure 2, tubular membrane filtering system 4 comprises casing 41, tubular membrane 42, water washing device 43 and medicine cleaning device 44, and millipore filtration 42, water washing device 43 and medicine cleaning device 44 are all arranged in casing 41.
Tubular membrane 42 is porous-films of being made by Superhigh Molecular Polymer, its pore diameter range is 0.1 micron, what in the present invention, select is pvdf membrane or PVDF/HDPE composite membrane, its support is very firm, wear-resisting wiping, high temperature resistant, pH can not reduce the ability that it holds back solid between 0-14, the principle of work of tubular membrane 42 is to take static pressure difference as impellent, utilize " screening " effect of film to carry out separation, it has more neat, uniform vesicular structure, under the effect of static pressure difference, the particle that is less than fenestra passes through film, the particle larger than fenestra is blocked on face, thereby make the component varying in size be able to separation, realize solid-liquid separation comparatively thoroughly.Tubular membrane 42, in conjunction with micro-flocculation technique, can be separated the suspended particle in waste water, colloid, organic macromolecule, bacterium, microorganism etc., and water is purified.Growth along with filtration time, particulate is trapped within face or fenestra, form one deck filter cake, for keeping certain flow, certainly will will increase driving pressure, when pressure is increased to certain value, the layer of holding back that must wash with water on 43 pairs of films of device carries out backwash, filter cake on eccysis film, the ability of recovery filter membrane.Generally, every 30～60 minutes, once, each backwash time is 60～90 seconds to automatic back-washing.
Running through the long period, pollutent in part water or particulate are adsorbed more firm by filter membrane, during backwash, can not be washed out completely and accumulate, at this moment just need medication cleaning device 44 to carry out matting to it, pollutent is reacted with chemical cleaning solution, and solution and film are thrown off, then are removed through backwash, the strainability that recovers film, the timed interval of matting is generally 10～20 days.
In one-level RO system 8 and secondary RO system 10, be provided with washing unit.When start and shutdown, meeting auto-flushing film surface is 60 seconds; but while having accumulated certain pollutent on the reverse osmosis membrane in one-level RO system 8 and secondary RO system 10; can automatically start medicine and wash film device, the pollutent on film surface can be rinsed well, extend the life-span of reverse osmosis membrane.
The reverse osmosis isolation temperature of one-level RO system is 10-50 ℃; the pressure of one-level high-pressure pump 12 is 1.0-1.8MPa; the reverse osmosis isolation temperature of secondary RO system is 10-50 ℃, and the pressure of secondary high-pressure pump 12 is 1.0-1.8MPa, during hypertonia, by high pressure protector, understands automatic shutdown protection.
Treatment system also comprises PLC Controlling System and the touch-screen being connected with PLC Controlling System, PLC Controlling System respectively with collect aeration water tank 1, reaction aeration water tank 2, concentrated water tank 3, tubular membrane filtering system 4, activated charcoal filter 5, readjustment aeration water tank 6, cartridge filter 7, one-level RO system 8, dense water tank 9, secondary RO system 10 and plate-and-frame filter press 11, one-level high-pressure pump 12, secondary high-pressure pump 13, adder-subtractor 21, acid adding device 14, fresh-water tank 15, the first lift pump 16, the second lift pump 17, recycle pump 18 is connected with sludge press filtration pump 19, for controlling action and the working time of each parts, whole system can be moved automatically, automatically clean.
The method of utilizing system of the present invention to carry out zero discharge treatment to the nickel-plating waste water in iron and steel workshop comprises the following steps:
The first step, waste water is first collected into collects buffer memory in aeration water tank 1, then by the first lift pump 16, squeeze in reaction aeration water tank 2, then from adder-subtractor 21, in reaction aeration water tank 2, add alkaline solution (as NaOH), make pollutent in waste water and after alkali reaction, generate solid precipitation (as nickel ion reacts generation nickel hydroxide with NaOH);
Second step, the waste water that comprises this solid precipitation is squeezed in concentrated water tank 3 by the second lift pump 17, in concentrated water tank 3, solid particulate matter precipitates, make the waste water in it be divided into supernatant liquid and lower sediment, supernatant liquid is wherein recycled pump 18 and squeezes in tubular membrane filtering system 4, in tubular membrane filtering system 4, the concentration of solid precipitation remains between 3-5%, lower sediment is depressed into plate-and-frame filter press 11 by sludge press filtration pump 19 and carries out press filtration, mud after press filtration is transported outward away, and the filtrate of formation enters collects aeration water tank 1;
The 3rd step, supernatant liquid is constantly concentrated in tubular membrane filtering system 4, the dense water that makes to contain solid precipitation is with to produce water separated, concentrate recirculation is to concentrating water tank 3 concentrating and precipitating again, produce water and after activated charcoal filter 5, enter into readjustment aeration water tank 6, activated charcoal filter 5 can reduce COD, absorption colloid and the particulate matter impurity in liquid, then from acid adding device 14, to readjustment aeration water tank 6, adds acid solution, regulates pH to enter cartridge filter 7 to neutrality;
The 4th step, the water flowing out from cartridge filter 7 pumps in one-level RO system 8 by one-level high-pressure pump 12, and from one-level RO system 8, product water is out deposited to fresh-water tank 15, in the time of need to utilizing, by going out water pump 20, pumped, dense water enters into dense water tank 9;
The 5th step, the second high-pressure pump 13 pumps into the water in dense water tank 9 in secondary RO system 10, and from secondary RO system 10, product water is out deposited to fresh-water tank 15, in the time of need to utilizing, by going out water pump 20, pumped, dense water is back to be collected in aeration water tank 1.
The present invention first by adding alkali to carry out Chemical Pretreatment in waste water, make nickel, copper, the metal ions such as zinc become precipitation, then by filtering the waste water through Chemical Pretreatment by tubular membrane filtering system 4, precipitation is transported outward away after plate-and-frame filter press 11, thereby can remove well the nickel in the nickel-plating waste water in iron and steel workshop, copper, the metal ions such as zinc, and in whole filtration procedure without separately establishing again settling bowl, also without using flocculation agent (PAM), water quality after filtering is limpid, do not carry fine suspended substance secretly, without sand charcoal and ultrafiltration, the SDI in waste water can be down between 1-3, therefore can accomplish qualified discharge.In addition, millipore filtration in tubular membrane filtering system can be removed the particulate matter in water completely, sludge quantity compared with traditional technique output is few, adopts the large cross-flow of tubular type to filter, and the tangential high speed flow of current is crossed film surface, the effect of washing away in addition cleaning film surface when filtering, pollutent is difficult for accumulation, and face is difficult for polluting, the cleaning that can bear well acidity, alkalescence, bleaching and oxidation medicament, therefore, tubular membrane filtering system has longer work-ing life.
And the activated charcoal filter 5 in the present invention can reduce COD, absorption colloid and the particulate matter impurity in water, thereby further removes the material that should not discharge in waste water, makes the nickel-plating waste water giving off from iron and steel workshop become standard compliant water.
After readjustment aeration water tank, cartridge filter 7, one-level RO system 8, dense water tank 9 and secondary RO system 10 are set, can realize the zero release of the nickel-plating waste water in iron and steel workshop, this be because, cartridge filter 7 can be removed the particulate matter impurity of leaving in water, to guarantee the normal operation of one-level RO system 8 and secondary RO system 10.One-level RO system 8 and secondary RO system 10 are utilized reverse osmosis method, can solute (ion, molecule) is separated with water by reverse osmosis membrane, semi-permeable membranes in one-level RO system 8 can be removed dissolved solid, more than 95% dissolved organic matter and the colloid of most ions, massfraction 90%-95%, its to the rejection of nickel ion more than 98%, the semi-permeable membranes in secondary RO system 10 to the rejection of nickel ion more than 99%; The coupling of two-stage RO system can be removed the metal ions such as the nickel of leaving in the waste water after tubular membrane filtering system 4, copper, zinc, thereby realize zero release, the dense water of one-level RO system 8 enters to enter secondary RO system 10 again and produced water after dense water tank 9 and stores utilization, can improve the efficiency of water treatment.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, to modifications and changes more of the present invention, also should fall in the protection domain of claim of the present invention.In addition,, although used some specific terms in this specification sheets, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. the zero-discharge treatment system of the nickel-plating waste water in an iron and steel workshop, it is characterized in that: comprise and collect aeration water tank, reaction aeration water tank, concentrated water tank, tubular membrane filtering system, activated charcoal filter, readjustment aeration water tank, cartridge filter, one-level RO system, dense water tank, secondary RO system, fresh-water tank, go out water pump and plate-and-frame filter press, the outlet of described collection aeration water tank is connected with the entrance of described reaction aeration water tank, the outlet of described reaction aeration water tank is connected with the waterwater entrance of described concentrated water tank, the liquid exit of described concentrated water tank is connected with the entrance of described tubular membrane filtering system, the solid outlet of described concentrated water tank is connected with the entrance of described plate-and-frame filter press, the filtrate outlet of described plate-and-frame filter press is connected with the entrance of described collection aeration water tank, the product water out of described tubular membrane filtering system is connected with described activated charcoal filter, the dense water out of described tubular membrane filtering system is connected with the dense water inlet of described concentrated water tank, the outlet of described activated charcoal filter is connected with the entrance of described readjustment aeration water tank, the outlet of described readjustment aeration water tank is connected with the entrance of described cartridge filter, the outlet of described cartridge filter is connected with the entrance of described one-level RO system by one-level high-pressure pump, the dense water out of described one-level RO system is connected with the entrance of described dense water tank, the outlet of described dense water tank is connected with the entrance of described secondary RO system by secondary high-pressure pump, the dense water out of described secondary RO system is connected with the entrance of described collection aeration water tank, the water outlet of described secondary RO system is also connected with adder-subtractor with the described aeration water tank that reacts, described readjustment aeration water tank is also connected with acid adding device.
2. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, it is characterized in that: described treatment system also comprises fresh-water tank, the product water out of the product water out of described one-level RO system and described secondary RO system is all connected with the entrance of described fresh-water tank.
3. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, is characterized in that: between described collection aeration water tank and described reaction aeration water tank, be provided with the first lift pump.
4. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, is characterized in that: between described reaction aeration water tank and the waterwater entrance of described concentrated water tank, be provided with the second lift pump.
5. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, is characterized in that: between the liquid exit of described concentrated water tank and described tubular membrane filtering system, be provided with recycle pump.
6. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, is characterized in that: between the solid outlet of described concentrated water tank and the entrance of described plate-and-frame filter press, be provided with sludge press filtration pump.
7. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, it is characterized in that: described tubular membrane filtering system comprises casing, millipore filtration, water washing device and medicine cleaning device, described millipore filtration, described water washing device and described medicine cleaning device are all arranged in described casing.
8. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, is characterized in that: in described one-level RO system and described secondary RO system, be provided with washing unit.
9. the zero-discharge treatment system of the nickel-plating waste water in iron and steel according to claim 1 workshop, is characterized in that: described treatment system also comprises PLC Controlling System and the touch-screen being connected with described PLC Controlling System.
10. utilize the system described in claim 1 nickel-plating waste water in iron and steel workshop to be carried out to a method for zero discharge treatment, it is characterized in that, comprise the following steps:
The first step, waste water is first collected into collects buffer memory in aeration water tank, then squeezes in reaction aeration water tank, then from adder-subtractor, in reaction aeration water tank, adds alkaline solution, makes to generate solid small particles after pollutent in waste water and alkali reaction and precipitates;
Second step, the waste water that comprises this solid small particles precipitation is driven in concentrated water tank, in concentrated water tank, solid particulate matter precipitates, make the waste water in it be divided into supernatant liquid and lower sediment, supernatant liquid is wherein squeezed in tubular membrane filtering system, and lower sediment is depressed into plate-and-frame filter press and carries out press filtration, mud after press filtration is transported outward away, and the filtrate of formation enters collects aeration water tank;
The 3rd step, supernatant liquid is constantly concentrated in tubular membrane filtering system, the dense water that makes to contain solid precipitation is with to produce water separated, concentrate recirculation is to concentrated water tank, produce water and after activated charcoal filter, enter into readjustment aeration water tank, then from acid adding device, to readjustment aeration water tank, add acid solution, regulate pH to enter cartridge filter to neutrality;
The 4th step, the water flowing out from cartridge filter pumps in one-level RO system by one-level high-pressure pump, and from one-level RO system, product water out can directly utilize, and dense water enters into dense water tank;
The 5th step, the second high-pressure pump pumps into the water in dense water tank in secondary RO system, and from secondary RO system, product water out can directly utilize, and dense water is back to be collected in aeration water tank.
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| CN104649468A (en) * | 2014-11-06 | 2015-05-27 | 东莞汇金环境科技有限公司 | Emission treatment system for high-concentration nickel chloride produced during electroplating |
| CN105000635A (en) * | 2015-08-18 | 2015-10-28 | 深圳市华虹清源环保科技有限公司 | Iron phosphate wastewater zero discharging treatment device and method |
| CN108529782A (en) * | 2017-03-06 | 2018-09-14 | 天津泰班科技发展有限公司 | A kind of industrial wastewater treatment device and treatment process |
| CN112607974A (en) * | 2020-12-25 | 2021-04-06 | 太仓夏鑫电镀有限公司 | Wastewater treatment system |
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| CN104649468A (en) * | 2014-11-06 | 2015-05-27 | 东莞汇金环境科技有限公司 | Emission treatment system for high-concentration nickel chloride produced during electroplating |
| CN104370397A (en) * | 2014-11-10 | 2015-02-25 | 李�杰 | Method and device for treating stainless steel polishing wastewater |
| CN104370397B (en) * | 2014-11-10 | 2016-01-06 | 李�杰 | Stainless steel polishing method of wastewater treatment and device |
| CN105000635A (en) * | 2015-08-18 | 2015-10-28 | 深圳市华虹清源环保科技有限公司 | Iron phosphate wastewater zero discharging treatment device and method |
| CN108529782A (en) * | 2017-03-06 | 2018-09-14 | 天津泰班科技发展有限公司 | A kind of industrial wastewater treatment device and treatment process |
| CN112607974A (en) * | 2020-12-25 | 2021-04-06 | 太仓夏鑫电镀有限公司 | Wastewater treatment system |
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Application publication date: 20141001 |