CN212025029U - Integrated equipment for treating waste pickling liquid of printed circuit board - Google Patents

Abstract

The utility model relates to an integration equipment for printed circuit board pickling waste liquid is handled, at first purify the separation to the waste liquid through diffusion dialysis device, then carry out the coagulating sedimentation to preparation circuit board in-process produced spent acid and washing liquid again, filter and get rid of heavy metal ion wherein, carry out dialysis once more through the clear solution after the diffusion dialysis is got rid of metal ion at last again, thereby obtain compound pickle surplus, can retrieve and recycle the dialysis, the concentrated storage of pickle can carry out simple aftertreatment and can discharge, satisfy the waste disposal requirement of miniaturized circuit board preparation rear end, reduce the production input cost.

Description

Integrated equipment for treating waste pickling liquid of printed circuit board

Technical Field

The utility model relates to an environmental protection treatment facility, concretely relates to an integrated equipment for printed circuit board pickling waste liquid is handled.

Background

In the wet processing process of the printed circuit board (circuit board), the circuit board is etched by adopting a pickling solution and then cleaned by using a large amount of water, so that various heavy metal wastewater and organic wastewater are discharged along with a cleaning solution, and the discharge of the waste liquid and the waste water seriously pollutes increasingly fragile ecological environment on one hand and causes the loss of a large amount of precious metal resources on the other hand. In order to make the wastewater treatment reach the discharge standard regulated by the state, a corresponding wastewater treatment method is required, but the treatment difficulty is higher because the components of the printed circuit board cleaning wastewater are complex (for example, the copper-containing wastewater generated in the etching process contains a large amount of acid liquor residues besides heavy metals such as copper, nickel and the like). The common treatment methods for heavy metal ions in the prior art mainly comprise a precipitation method, an ion exchange method and an activated carbon adsorption method. The equipment used in the precipitation method is complex and occupies large area; acid, alkali and heavy metal pollutants discharged during regeneration by an ion exchange method are easy to become secondary pollution, and an activated carbon adsorption method is short in adsorption period and not ideal in treatment effect. The method commonly used in the field of organic waste water is aerobic or anaerobic biological treatment, although the treatment effect is good, the capital investment is large, and the occupied area is large. For some PCB production enterprises with smaller production volumes, the wastewater treatment system can be very large due to the small amount of wastewater, as designed according to conventional processes.

Therefore, there is an urgent need for an apparatus for integrated treatment of waste pickle liquor of printed wiring boards, which is suitable for small-sized enterprises.

Disclosure of Invention

The utility model aims at providing an integration equipment for printed circuit board pickling waste liquid is handled, it can realize the sedimentation treatment to the circuit board spent acid, can realize simultaneously to wherein acidizing fluid recycle, and the discharged water also can reach the discharge standard, and the input cost is low.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides an integrated equipment for processing pickling waste liquid of printed circuit boards, which is characterized by comprising a first diffusion dialysis device, a first sedimentation tank, a first filter, a second sedimentation tank, a second filter, a second diffusion dialysis device and a recycling acid tank which are connected in sequence, wherein the pickling waste liquid enters the first diffusion dialysis device to respectively obtain mixed acid liquid and dialysis liquid, the high-concentration side of the diffusion side of the first diffusion dialysis device is introduced into the first sedimentation tank, the first sedimentation tank is connected with a first medicine adding tank loaded with chlorine-containing precipitator, the clear liquid in the first sedimentation tank is introduced into the second sedimentation tank after being filtered by the first filter, the second sedimentation tank is connected with a second medicine adding tank loaded with sulfur acid radical precipitator, the clear liquid in the second sedimentation tank is filtered by the second filter and then is introduced into the second diffusion dialysis device, and the high-concentration side of the diffusion side of the second diffusion dialysis device is connected with the acid recovery tank.

With respect to the above technical solutions, the applicant has further optimized embodiments.

Optionally, the first dosing tank stores one of sodium chloride or hydrochloric acid, and the second dosing tube stores sodium sulfate.

Optionally, still include pure water jar and dialysis fluid jar, the imbibition side of first diffusion dialysis device is connected to the pickling waste liquid, the pure water jar is connected the diffusion side of first diffusion dialysis device and the diffusion side of second diffusion dialysis device, the high concentration one side of the diffusion side of first diffusion dialysis device with first sedimentation tank links to each other, the low concentration one side of the dialysis side of first diffusion dialysis device with dialysis fluid jar links to each other, the high concentration one side of the diffusion side of second diffusion dialysis device with it links to each other to retrieve the acid jar, the low concentration one side of the dialysis side of second diffusion dialysis device with dialysis fluid jar links to each other.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model discloses an integration equipment for handle printed circuit board pickling waste liquid, at first carry out the purification separation to the waste liquid through diffusion dialysis device, then carry out the coagulating sedimentation to preparation circuit board in-process produced spent acid and washing liquid again, filter and get rid of heavy metal ion wherein, carry out dialysis treatment once more to the clear solution after getting rid of metal ion through diffusion dialysis again at last, thereby obtain compound pickle surplus, can retrieve and recycle the dialysis, the concentrated storage of pickle can carry out simple aftertreatment and can discharge, satisfy the waste disposal requirement of miniaturized circuit board preparation rear end, reduce the production input cost.

Furthermore, the liquid conveying amount of components such as a rear end sedimentation tank and the like can be effectively reduced after the components pass through the first diffusion dialysis device, the equipment investment is reduced, and the treatment cost is reduced.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic diagram of the overall structure of an integrated device according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The embodiment provides integrated equipment for processing the pickling waste liquid of the printed circuit board, which comprises a first diffusion dialysis device, a first sedimentation tank, a first filter, a second sedimentation tank, a second filter, a second diffusion dialysis device and a recovered acid tank which are sequentially connected, wherein the pickling waste liquid enters the first diffusion dialysis device to respectively obtain mixed acid liquid and dialysis liquid, the high-concentration side of the diffusion side of the first diffusion dialysis device is introduced into the first sedimentation tank, the first sedimentation tank is connected with a first chemical adding tank carrying a chlorine-containing precipitator, clear liquid in the first sedimentation tank is introduced into the second sedimentation tank after being filtered by the first filter, the second sedimentation tank is connected with a second chemical adding tank carrying a sulfur sulfate radical-containing precipitator, the clear liquid in the second sedimentation tank is filtered by the second filter and then is introduced into the second diffusion dialysis device, and the high-concentration side of the diffusion side of the second diffusion dialysis device is connected with the acid recovery tank.

Still include pure water jar and dialysis fluid jar in this embodiment, the imbibition side of pickling waste liquid access first diffusion dialysis device, the pure water jar is connected into the diffusion side of first diffusion dialysis device and the diffusion side of second diffusion dialysis device, the high concentration one side of the diffusion side of first diffusion dialysis device with first sedimentation tank links to each other, the low concentration one side of the dialysis side of first diffusion dialysis device with dialysis fluid jar links to each other, the high concentration one side of the diffusion side of second diffusion dialysis device with it links to each other to retrieve the acid jar, the low concentration one side of the dialysis side of second diffusion dialysis device with dialysis fluid jar links to each other.

It will be appreciated that in both diffusion dialysers, the waste liquid and pure water are passed in countercurrent in opposite directions through the dialysis side and the diffusion side of the diffusion dialyser, whereby the dialyser is obtained on the low concentration side of the dialysis side of the diffusion dialyser and the acid is obtained on the high concentration side of the diffusion dialyser.

And finally, enriching acidic substances on the diffusion side of the second diffusion dialysis device to form mixed recovered acid, and sending the mixed recovered acid to a recovered acid tank, wherein the mixed recovered acid in the recovered acid tank can be reversely reused in the circuit board acid cleaning process.

Further, one of sodium chloride or hydrochloric acid is stored in the first medicine adding tank, and sodium sulfate is stored in the second medicine adding pipe.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (4)

1. An integrated device for processing the pickling waste liquid of the printed circuit board is characterized by comprising a first diffusion dialysis device, a first sedimentation tank, a first filter, a second sedimentation tank, a second filter, a second diffusion dialysis device and a recycling acid tank which are sequentially connected, wherein the pickling waste liquid enters the first diffusion dialysis device to respectively obtain mixed acid liquid and dialysis liquid, the high-concentration side of the diffusion side of the first diffusion dialysis device is introduced into the first sedimentation tank, the first sedimentation tank is connected with a first medicine adding tank carrying a chlorine-containing precipitator, clear liquid in the first sedimentation tank is introduced into the second sedimentation tank after being filtered by the first filter, the second sedimentation tank is connected with a second medicine adding tank carrying a sulfate radical-containing precipitator, the clear liquid in the second sedimentation tank is filtered by the second filter and then is introduced into the second diffusion dialysis device, and the high-concentration side of the diffusion side of the second diffusion dialysis device is connected with the acid recovery tank.

2. The integrated apparatus of claim 1, wherein the first dosing tank contains one of sodium chloride or hydrochloric acid.

3. The integrated apparatus of claim 1, wherein the second dosing tube contains sodium sulfate.

4. The integrated apparatus according to claim 1, further comprising a pure water tank and a dialysate tank, wherein the pickling waste liquid is connected to a permeation side of a first diffusion dialysis apparatus, the pure water tank is connected to a diffusion side of the first diffusion dialysis apparatus and a diffusion side of a second diffusion dialysis apparatus, a high concentration side of the diffusion side of the first diffusion dialysis apparatus is connected to the first sedimentation tank, a low concentration side of the dialysis side of the first diffusion dialysis apparatus is connected to the dialysate tank, a high concentration side of the diffusion side of the second diffusion dialysis apparatus is connected to the recovered acid tank, and a low concentration side of the dialysis side of the second diffusion dialysis apparatus is connected to the dialysate tank.

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