CN201427903Y

CN201427903Y - Nickel electroplating rinse water cleaning system

Info

Publication number: CN201427903Y
Application number: CN2009201375057U
Authority: CN
Inventors: 黄松青
Original assignee: XIAMEN TIANQUANXIN MEMBRANE TECHNOLOGY Co Ltd
Current assignee: Xiamen TQX Membrane Technology Limited
Priority date: 2009-04-02
Filing date: 2009-04-02
Publication date: 2010-03-24
Anticipated expiration: 2019-04-02

Abstract

The utility model discloses a cleaning system of nickel electroplating rinse water, which comprises a precise filter, a concentration circulating tank, a nanofiltration membrane separating device, a concentration intermediate tank, a reverse osmosis membrane separating device, a water generating tank, a pump and pipelines for connecting each part. The precise filter is connected with an inlet ofthe concentration circulating tank, an outlet of the concentration circulating tank and the pump are connected with the nanofiltration membrane separating device, a nanofiltration membrane dialysis fluid pipeline is connected onto the concentration intermediate tank, concentrated fluid flows back to the concentration circulating tank; the concentration intermediate tank is connected with the reverse osmosis membrane separating device via the pump, simultaneously a concentrated fluid return pipe of the reverse osmosis membrane separating device is connected with the inlet of the concentration circulating tank via a pipeline, and a reverse osmosis membrane dialysis fluid pipeline is connected onto the water generating tank. By utilizing separation mechanisms of different membranes to cause organic combination, the system enables the nickel electroplating rinse water to realize high concentration, simplifies processing procedures, achieves complete recycle of nickel and electroplate auxiliaries, and achieves the purpose of clean production of zero emission.

Description

Electronickelling rinse water cleaning system

Technical field

The utility model is to belong to the electroplating effluent process field, is meant a kind of electronickelling rinse water cleaning system especially.

Background technology

Electroplating industry is the important processing industry of China, at present based on zinc-plated, copper facing, nickel plating and chromium plating, concentrates to be distributed in the industrial circles such as machine manufacturing, light industry, electronics, aerospace and instrument.The root incomplete statistics, the waste water that the annual discharging of national electroplating industry contains heavy metal causes the severe contamination of rivers,lakes and seas greatly about 400,000,000 tons.

And method comparatively commonly used has chemical method, high-voltage pulse electrolytic process, ion exchange method and biological process etc. in the electroplating effluent purifying treatment.In fact, the treatment process of these heavy metal wastewater therebies all is a kind of pollution transportation, and dissolved heavy metal in the waste water is changed into precipitation or more easy-to-handle form, to the final disposal of these materials, normally carries out landfill.Therefore, heavy metal is to the harm of environment long-term existence still, usually causes in the pollution of water and surface water down, and the improvement of this pollution is usually needed to pay expensive more cost.In today of water resources growing tension, be subjected to various countries' water treatment dealer's generally attention with technology such as waste water recycling and material recovery.

Now for electronickelling rinse water reclaiming system, promptly be the heavy metal nickel ionic in this waste liquid to be handled adopt secondary filter and ultrafiltration as pre-treatment, directly enter the reverse osmosis membrane system concentration then, the nickel ion reverse osmosis concentrated liquid that obtains turns back in the Electroplating Production operation to be recycled, and dialyzate is as the water of productive use reuse.But high ionic total osmotic pressure such as single nickel salt and sodium-chlor etc. at a low price are restricted the spissated ultimate density of waste liquid in this system.Therefore, present method exist complex procedures, cycles of concentration low, can not realize complete-reclaiming, electroplating additives can not reclaim, and can not realize many defectives of zero release.

The utility model content

The purpose of this utility model provides a kind of electronickelling rinse water cleaning system, and its high density that can realize the electronickelling rinse water concentrates, and nickel and auxiliary agent are reclaimed synchronously, satisfies the rinsing process requirement and produce water, realizes the cleaner production target of zero release.

For achieving the above object, solution of the present utility model is:

A kind of cleaning system of electronickelling rinse water, it comprises accurate filter, concentrated circulation tank, nanofiltration membrane separation device, concentrates tundish, reverse osmosis membrane separation device, reuse water pot and pump, also has the pipeline that connects each part; Accurate filter links to each other with concentrated circulation tank import, and the outlet that concentrates circulation tank is connected the nanofiltration membrane separation device again with pump, and nanofiltration membrane dialyzate pipe connection is to middle concentration tank, and concentrated solution flows back to concentrated circulation tank; Middle concentration tank links to each other with the reverse osmosis membrane separation device by pump, the concentrated solution return line of a pipe connection reverse osmosis membrane separation device and the import of concentrated circulation tank simultaneously, and reverse osmosis membrane dialyzate pipe connection is to producing on the water pot.

Described pump comprises nanofiltration recycle pump and reverse osmosis recycle pump, and the nanofiltration recycle pump connects concentrated circulation tank outlet and nanofiltration membrane separation device; Concentration tank and reverse osmosis membrane separation device in the middle of the reverse osmosis recycle pump connects.

After adopting such scheme, the utility model has been removed the ultrafiltration step of prior art in preprocessor, be to enter nanofiltration membrane separation device or reverse osmosis system selectively according to nickel rinse water concentration, and utilize nanofiltration and reverse osmosis to hold back the different of characteristic separated target is held back respectively, greatly reduce the osmotic pressure that bears of nanofiltration or reverse osmosis, thereby nickel rinse water concentration is improved significantly.This utilizes the separating mechanism of different films, carries out organic assembling, makes method of the present utility model can realize that high power concentrates, and simplifies treatment process, realizes that nickel and electroplating additives all reclaim, and realize the cleaner production target of zero release.

Description of drawings

Fig. 1 is the utility model electronickelling rinse water cleaning system synoptic diagram.

Embodiment

Cooperate shown in Figure 1, the cleaning system of electronickelling rinse water of the present utility model comprise accurate filter 1, concentrated circulation tank 2, nanofiltration recycle pump 3, nanofiltration membrane separation device 4, concentrate tundish 5, reverse osmosis recycle pump 6, reverse osmosis membrane separation device 7, reuse water pot 8 and be connected each pipeline 9 partly.Accurate filter 1 links to each other with concentrated circulation tank 2 imports by pipeline 9, and the outlet that concentrates circulation tank 2 links to each other with reverse osmosis recycle pump 6 with nanofiltration recycle pump 3 respectively by pipeline 9; Nanofiltration recycle pump 3 links to each other with nanofiltration membrane separation device 4 by pipeline 9, and on the concentration tank 5, concentrated solution was flowed back to by pipeline 9 and concentrates circulation tank 2 in the middle of nanofiltration membrane dialyzate pipeline 41 was connected to; Middle concentration tank 5 links to each other with reverse osmosis membrane separation device 7 with pipeline 9 by reverse osmosis recycle pump 6, a pipeline 9 connects the import of concentrated solution return line 72 with the concentrated circulation tank 2 of reverse osmosis membrane separation device 7 simultaneously, and reverse osmosis membrane dialyzate pipeline 71 is connected to and produces on the water pot 8.

Utilize above-mentioned cleaning system to be to the concrete steps that the electronickelling rinse water clean:

1), decon, the electronickelling rinse water are removed impurity through accurate filter 1, remove the impurity that influence nanofiltration and reverse osmosis operating parameter, make rinse water water quality satisfy nanofiltration and feed water by reverse osmosis condition, as the impurity of removal particle diameter greater than 5 μ m;

2), concentrate, to enter through the electronickelling rinse water of decon and concentrate circulation tank 2, the initial nickel concentration height of rinse water (＞enter nanofiltration membrane separation device 4 by nanofiltration recycle pump 3 5g/L) time to circulate concentrated, hold back high valence ion, as single nickel salt, and auxiliary agent, concentrated solution is back to and concentrates in the circulation tank 2, when concentrated volume is less than or equal to the reuse volume, be back to the electrodeposit groove;

3), reconcentration, to enter by pipeline 41 through the nanofiltration dialyzate of nanofiltration membrane separation device 4 and concentrate tundish 5, and via reverse osmosis force (forcing) pump 6 the nanofiltration dialyzate will be transported to and circulate concentratedly in the reverse osmosis membrane separation device 7, hold back ion at a low price, as sodium-chlor and a small amount of high valence ion;

4), separate, the reverse osmosis of handling through reverse osmosis membrane separation device 7 sees through liquid and enters and produce in the water pot 8, is back to production; Reverse osmosis concentrated liquid reaches design concentration, during as nickel concentration 〉=10g/L, turns back to and concentrates in the circulation tank 2, is further concentrated by nanofiltration membrane separation device 4, and the nanofiltration concentrated solution is until reaching coating bath reuse volume;

5), when the initial nickel concentration of rinse water low (＜5g/L) time, directly enter in the reverse osmosis membrane separation device 7 by pipeline 9 and reverse osmosis recycle pump 6 and concentrate by the outlet that concentrates circulation tank 2, being back to concentrated circulation tank 2 when reaching design concentration is more further concentrated by nanofiltration membrane separation device 4, concentrated solution is back to and concentrates in the circulation tank 2, when concentrated volume is less than or equal to the reuse volume, be back to the electrodeposit groove.

To sum up, the cleaning system of electronickelling rinse water of the present utility model, be only to use the pre-treatment of secondary filter as nanofiltration membrane separation device or reverse osmosis system, in preprocessor, removed the ultrafiltration step of prior art, be to enter nanofiltration membrane separation device or reverse osmosis system selectively according to nickel rinse water concentration, and utilize nanofiltration and reverse osmosis to hold back the different of characteristic separated target is held back respectively, greatly reduce nanofiltration or reverse osmosis bear osmotic pressure (≤25bar), thereby nickel rinse water concentration is improved significantly.This system utilizes the separating mechanism of different films, carries out organic assembling, makes electronickelling rinse water of the present utility model can realize that high power concentrates, and simplifies treatment process, realizes that nickel and electroplating additives all reclaim, and realize the cleaner production target of zero release.

Claims

1, a kind of cleaning system of electronickelling rinse water is characterized in that: comprise accurate filter, concentrated circulation tank, nanofiltration membrane separation device, concentrated tundish, reverse osmosis membrane separation device, produce water pot and pump, also have to connect respectively pipeline of part; Accurate filter links to each other with concentrated circulation tank import, and the outlet that concentrates circulation tank is connected the nanofiltration membrane separation device again with pump, and nanofiltration membrane dialyzate pipe connection is to concentrating on the tundish, and concentrated solution flows back to concentrated circulation tank; Concentrate tundish and link to each other with the reverse osmosis membrane separation device by pump, the concentrated solution return line of a pipe connection reverse osmosis membrane separation device and the import of concentrated circulation tank simultaneously, reverse osmosis membrane dialyzate pipe connection is to producing on the water pot.

2, the cleaning system of electronickelling rinse water as claimed in claim 1 is characterized in that: described pump comprises nanofiltration recycle pump and reverse osmosis recycle pump, and the nanofiltration recycle pump connects concentrated circulation tank outlet and nanofiltration membrane separation device; The reverse osmosis recycle pump that links to each other connects concentrated tundish and reverse osmosis membrane separation device.