CN103225100B - Plating solution filtering purifier and method thereof - Google Patents

Abstract

The invention relates to a device and method for filtering and purifying electroplating solution. The device comprises an electroplating solution circulation tank, a filter aid tank, a first filtration circulation pump, a filter, a first pipeline, a second pipeline, a third pipeline and a fourth pipeline , the fifth pipeline, the sixth pipeline, the seventh pipeline, the eighth pipeline, the ninth pipeline, and the tenth pipeline; the first pipeline is provided with a first control valve, the fifth pipeline is provided with a second control valve, and the sixth pipeline A third control valve is provided on the upper pipe, a fourth control valve is provided on the seventh pipe, a fifth control valve is provided on the eighth pipe, and a sixth control valve is provided on the ninth pipe; the method includes preparing filter aid, pre- There are four steps of coating filter aid, filtering and backwashing. The invention can realize automatic filtration of electroplating solution, remove impurities in the electroplating solution, and realize backwashing of the filter. Backwashing only needs to use a small amount of electroplating solution, with extremely low water consumption and little waste water generated.

Description

Electroplating solution filtration and purification device and method

technical field

The invention relates to the field of liquid filtration, in particular to a device and method for filtering and purifying electroplating solution.

Background technique

In the continuous electrogalvanizing line for cold-rolled strip steel, the galvanization of the strip surface is realized in the electroplating section, and the process parameters such as the composition of the electroplating solution, pH value, temperature and impurity content during electroplating all directly affect the quality of the product. During the production process of electrogalvanizing, the impurities in the strip surface, air, pipeline, evaporative concentration system and zinc dissolution system zinc particles will enter the electroplating bath, and these impurities mainly exist in the form of fine suspended solids and colloidal substances. is extremely unfavorable and must therefore be removed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a device and method for filtering and purifying electroplating solution.

The technical scheme adopted by the present invention to solve its technical problems is: to construct a kind of electroplating solution filtration and purification device, comprising electroplating solution circulation tank, filter aid tank, first filter circulation pump and filter; the outlet of said electroplating solution circulation tank Connect with the inlet of the first filter circulation pump through the first pipeline and the second pipeline in turn, the first pipeline is provided with a first control valve; the outlet of the first filter circulation pump passes through the third pipeline, the second pipeline in turn Four pipelines and the fifth pipeline are connected with the inlet of the filter, and the fifth pipeline is provided with a second control valve; the fourth pipeline is also connected with the outlet of the filter through the sixth pipeline, and the first pipeline is connected with the outlet of the filter. The sixth pipeline is provided with a third control valve; the inlet of the filter is also connected to the seventh pipeline, and the seventh pipeline is provided with a fourth control valve; the sixth pipeline is also connected with the electroplating solution through the eighth pipeline. The inlet of the circulation tank is connected, the eighth pipeline is provided with a fifth control valve; the eighth pipeline is connected with the inlet of the filter aid tank through the ninth pipeline, and the ninth pipeline is provided with a sixth control valve ; The outlet of the filter aid tank is connected to the second pipeline through the tenth pipeline, and the seventh control valve is arranged on the tenth pipeline.

In the electroplating solution filtration and purification device of the present invention, the filter is provided with a differential pressure controller.

In the electroplating solution filtration and purification device according to the present invention, a twelfth pipeline, a second filtration circulation pump and a thirteenth pipeline connected in sequence are further provided between the first pipeline and the fourth pipeline.

In the electroplating solution filtration and purification device of the present invention, the second pipeline is provided with a first manual valve, and the third pipeline is provided with a second manual valve and a first check valve.

In the electroplating solution filtration and purification device of the present invention, the twelfth pipeline is provided with a third manual valve, and the thirteenth pipeline is provided with a fourth manual valve and a second check valve.

In the electroplating solution filtration and purification device according to the present invention, the filtration and purification device further includes an eleventh pipeline connected to the inlet of the filter aid tank and a feeding funnel.

In the electroplating solution filtration and purification device according to the present invention, a fifth manual valve is provided on the eleventh pipeline.

In the electroplating solution filtration and purification device according to the present invention, the eighth pipeline is provided with a sight glass.

The present invention also provides a method for purifying an electroplating solution using the above-mentioned filtering and purifying device, comprising the following steps:

S1, prepare filter aid; close the seventh control valve, add filter aid and desalted water into the filter aid tank, and fully stir;

S2, pre-coat filter aid; open the seventh control valve, the second control valve and the sixth control valve, close the first control valve, the third control valve, the fourth control valve and the fifth control valve, start the first filter Circulation pump to coat the filter aid in the filter;

S3, filter; close the seventh control valve, the sixth control valve, the fourth control valve and the third control valve, open the first control valve, the second control valve and the fifth control valve, and pass the electroplating solution through the first filter circulation pump Send to the filter for filtration and purification;

S4, backwashing; close the second control valve, the fifth control valve, the sixth control valve and the seventh control valve, open the first control valve, the third control valve and the fourth control valve, and pass the electroplating solution into the filter Backwashing is carried out, and the sewage after backwashing is discharged from the seventh pipe.

In the method for purifying the electroplating solution of the present invention, the filter aid is diatomaceous earth.

Implementing the electroplating solution filtration and purification device and method of the present invention has the following beneficial effects: the automatic filtration of the electroplating solution can be realized by the present invention, the impurities in the electroplating solution can be removed, and the backwash of the filter can be realized, and the backwash only needs to use a small amount of The electroplating solution has extremely low water consumption and produces very little wastewater.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Figure 1 is a schematic structural view of the electroplating solution filtration and purification device of the present invention.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in Figure 1, the electroplating solution filtration purification device of the present invention comprises electroplating solution circulation tank 36, filter aid tank 28, the first filter circulation pump 7, filter 22, first pipeline 1, second pipeline 3, the third Pipe 9 , fourth pipe 15 , fifth pipe 16 , sixth pipe 17 , seventh pipe 20 , eighth pipe 24 , ninth pipe 26 , and tenth pipe 33 .

The outlet of the electroplating solution circulation tank 36 is connected to the inlet of the first filtration circulation pump 7 through the first pipeline 1 and the second pipeline 3 in sequence, and the first control valve 2 is arranged on the first pipeline 1 . The input end of the first pipeline 1 is connected to the outlet of the plating solution circulation tank 36 , and the output end is connected to the output end of the tenth pipeline 33 .

The outlet of the first filtration circulating pump 7 is connected to the inlet of the filter 22 through the third pipeline 9 , the fourth pipeline 15 and the fifth pipeline 16 in sequence, and the fifth pipeline 16 is provided with a second control valve 18 . The fourth pipeline 15 is also connected to the outlet of the filter 22 through the sixth pipeline 17 , and the third control valve 19 is arranged on the sixth pipeline 17 . The inlet of the filter 22 is also connected to the seventh pipeline 20, the fourth control valve 21 is arranged on the seventh pipeline 20, and the seventh pipeline 20 is used for connecting with the sewage pit.

The sixth pipeline 17 is also connected to the inlet of the plating solution circulation tank 36 through the eighth pipeline 24 , and the fifth control valve 25 is arranged on the eighth pipeline 24 . The eighth pipeline 24 is connected to the inlet of the filter aid tank 28 through the ninth pipeline 26 , and the sixth control valve 27 is arranged on the ninth pipeline 26 . When the fifth control valve 25 is closed and the sixth control valve 27 is opened, the liquid in the eighth pipeline 24 flows into the ninth pipeline 26; when the sixth control valve 27 is closed and the fifth control valve 25 is opened, the liquid in the eighth pipeline 24 The liquid in flows into the plating solution circulation tank 36.

The outlet of the filter aid tank 28 is connected to the second pipeline 3 through a tenth pipeline 33 , and a seventh control valve 34 is provided on the tenth pipeline 33 .

Further, the filter 22 is provided with a differential pressure controller 23 . The pressure difference between the inlet and outlet of the filter 22 is detected by the pressure difference controller 23, and when the pressure difference reaches a set value, the filtration is completed.

Further, a twelfth pipeline 4 , a second filtration circulating pump 8 and a thirteenth pipeline 10 are arranged in sequence between the first pipeline 1 and the fourth pipeline 15 . The second pipeline 3 is provided with a first manual valve 5 , and the third pipeline 9 is provided with a second manual valve 13 and a first check valve 11 . The twelfth pipeline 4 is provided with a third manual valve 6 , and the thirteenth pipeline 10 is provided with a fourth manual valve 14 and a second check valve 12 . The first filter pump 7 and the valves before and after the pump and the second filter circulation pump 8 and the valves before and after the pump are arranged side by side, and are mutually standby.

Further, the filtering and purifying device also includes an eleventh pipeline 31 connected to the inlet of the filter aid tank 28 and a feeding funnel 30 . The filter aid can be added to the filter aid tank 28 through the feeding funnel 30, and desalted water can be added to the filter aid tank 28 through the eleventh pipeline 31, and a stirrer 29 can be set in the filter aid tank 28 to stir. In the present invention The filter aid is preferably diatomaceous earth. A fifth manual valve 32 may also be provided on the eleventh pipeline 31 .

Further, the eighth pipe 24 is provided with a viewing mirror 35 . The situation of the liquid in the eighth pipeline 24 can be observed through the sight glass 35 .

The present invention also provides a method for purifying an electroplating solution using the above-mentioned filtering and purifying device, comprising the following steps:

S1. Prepare filter aid; close the seventh control valve 34, add filter aid and desalted water into the filter aid tank 28, and fully stir.

S2, pre-coat filter aid; open the seventh control valve 34, the second control valve 18 and the sixth control valve 27, close the first control valve 2, the third control valve 19, the fourth control valve 21 and the fifth control valve Valve 25 starts the first filter circulation pump 7, and the filter aid enters in the filter 22 through the tenth pipeline 33, the second pipeline 3, the third pipeline 9, the fourth pipeline 15 and the fifth pipeline 16, and the filter aid coated in the filter 22; the filter aid flows back into the filter aid tank 28 through the eighth channel and the ninth pipe 26 from the outlet of the filter 22 in sequence. Observe the mixed solution in the sight glass 35 until it becomes clear or the pre-coating time reaches the set value, and the pre-coating of the filter aid is completed.

S3, filter; close the seventh control valve 34, the sixth control valve 27, the fourth control valve 21 and the third control valve 19, open the first control valve 2, the second control valve 18 and the fifth control valve 25, pass the A filtration circulating pump 7 delivers the electroplating solution to the filter 22 . The electroplating solution passes through the first pipeline 1, the second pipeline 3, the third pipeline 9, the fourth pipeline 15, and the fifth pipeline 16 to filter and purify in the filter 22, and the filtered electroplating solution flows into the electroplating solution through the eighth pipeline 24 for circulation Inside the tank 36.

S4, backwash; close the second control valve 18, the fifth control valve 25, the sixth control valve 27 and the seventh control valve 34, open the first control valve 2, the third control valve 19 and the fourth control valve 21, start The first filter circulation pump 7, the electroplating solution enters in the filter 22 through the first pipeline 1, the second pipeline 3, the third pipeline 9, the fourth pipeline 15 and the sixth pipeline 17 for backwashing, and the sewage after backwashing is from The seventh pipe 20 discharges.

The filter aid in the method of the present invention is preferably diatomite, and the cost of diatomite is relatively low, and the entry of diatomite solids into waste water does not increase the load of water treatment, and automatic filtration and backwashing can be realized, and only a small amount of water is required for backwashing. The electroplating solution has extremely low water consumption and produces very little wastewater.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (10)

1. an electroplate liquid filtering and purifying, is characterized in that, comprises electroplate liquid circulation tank (36), flocculating aids tank (28), the first filtration cycle pump (7) and strainer (22);

The outlet of described electroplate liquid circulation tank (36) is connected with the entrance of second pipe (3) with described first filtration cycle pump (7) by the first pipeline (1) successively, and described first pipeline (1) is provided with the first control valve (2);

The outlet of described first filtration cycle pump (7) is connected with the entrance of described strainer (22) by the 3rd pipeline (9), the 4th pipeline (15), the 5th pipeline (16) successively, and described 5th pipeline (16) is provided with the second control valve (18);

Described 4th pipeline (15) is also connected with the outlet of described strainer (22) by the 6th pipeline (17), and described 6th pipeline (17) is provided with the 3rd control valve (19);

The entrance of described strainer (22) also connects the 7th pipeline (20), and described 7th pipeline (20) is provided with the 4th control valve (21);

Described 6th pipeline (17) is also connected with the entrance of described electroplate liquid circulation tank (36) by the 8th pipeline (24), and described 8th pipeline (24) is provided with the 5th control valve (25);

Described 8th pipeline (24) is connected with described flocculating aids tank (28) entrance by the 9th pipeline (26), and described 9th pipeline (26) is provided with the 6th control valve (27);

The outlet of described flocculating aids tank (28) is connected with described second pipe (3) by the tenth pipeline (33), and described tenth pipeline (33) is provided with the 7th control valve (34).

2. electroplate liquid filtering and purifying according to claim 1, is characterized in that, described strainer (22) is provided with differential pressure controller (23).

3. electroplate liquid filtering and purifying according to claim 1, it is characterized in that, between described first pipeline (1) and described 4th pipeline (15), be also provided with the 12 pipeline (4), the second filtration cycle pump (8), the 13 pipeline (10) that connect successively.

4. electroplate liquid filtering and purifying according to claim 1, is characterized in that, described second pipe (3) is provided with the first manual valve (5), and described 3rd pipeline (9) is provided with the second manual valve (13) and the first vacuum breaker (11).

5. electroplate liquid filtering and purifying according to claim 3, is characterized in that, described 12 pipeline (4) is provided with the 3rd manual valve (6), and described 13 pipeline (10) is provided with the 4th manual valve (14) and the second vacuum breaker (12).

6. electroplate liquid filtering and purifying according to claim 1, is characterized in that, described filtering and purifying also comprises the 11 pipeline (31) and feed hopper (30) that are connected with described flocculating aids tank (28) entrance.

7. electroplate liquid filtering and purifying according to claim 6, is characterized in that, described 11 pipeline (31) is provided with the 5th manual valve (32).

8. electroplate liquid filtering and purifying according to claim 1, is characterized in that, described 8th pipeline (24) is provided with visor (35).

9. use an electroplate liquid purifying method for the filtering and purifying described in claim 1, it is characterized in that, comprise the following steps:

S1, preparation flocculating aids; Close the 7th control valve (34), in flocculating aids tank (28), add flocculating aids and de-salted water, and fully stir;

S2, precoating flocculating aids; Open the 7th control valve (34), the second control valve (18) and the 6th control valve (27), close the first control valve (2), the 3rd control valve (19), the 4th control valve (21) and the 5th control valve (25), start the first filtration cycle pump (7), flocculating aids is coated in strainer (22);

S3, filtration; Close the 7th control valve (34), the 6th control valve (27), the 4th control valve (21) and the 3rd control valve (19), open the first control valve (2), the second control valve (18) and the 5th control valve (25), by the first filtration cycle pump (7), electroplate liquid is delivered to filtration, purification in strainer (22);

S4, back flushing; Close the second control valve (18), the 5th control valve (25), the 6th control valve (27) and the 7th control valve (34), open the first control valve (2), the 3rd control valve (19) and the 4th control valve (21), in strainer (22), pass into electroplate liquid carry out back flushing, the sewage after back flushing is discharged from the 7th pipeline (20).

10. electroplate liquid purifying method according to claim 9, it is characterized in that, described flocculating aids is diatomite.