CN216863844U

CN216863844U - PVP recovery unit among metal powder waste water

Info

Publication number: CN216863844U
Application number: CN202123171261.4U
Authority: CN
Inventors: 张幸定; 吴庭; 叶天雄; 王亮; 徐飞; 张柯柯
Original assignee: Hubei Dijie Membrane Technology Co ltd
Current assignee: Hubei Dijie Membrane Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-07-01
Anticipated expiration: 2031-12-16

Abstract

The application provides PVP recovery unit among metal powder waste water belongs to waste water resourceful treatment technical field. Should wash jar including toper PH equalizing basin, ceramic ultrafiltration membrane system, ceramic nanofiltration membrane system and PVP, toper PH equalizing basin has first feed pump through first tube coupling, first feed pump has first circulating pump through the second tube coupling, first circulating pump with ceramic ultrafiltration membrane system intercommunication sets up, the intercommunication has the third pipeline between ceramic ultrafiltration membrane system and the toper PH equalizing basin, the intercommunication has first circulation pipeline between third pipeline and the second pipeline, ceramic ultrafiltration membrane system with the intercommunication has the concentrate exit tube between the PVP washs the jar, the PVP washs the jar and is connected with the second feed pump through the fourth tube coupling. The membrane is separated by pure physical separation by utilizing the selective filtration function of the membrane aperture, does not influence the product structure, has simple and reliable process and can be produced in large scale.

Description

PVP recovery unit among metal powder waste water

Technical Field

The application relates to the field of wastewater recycling treatment, in particular to a PVP (polyvinyl pyrrolidone) recovery device in metal powder production wastewater.

Background

Silver powder is the most widely used and important noble metal powder in the electrical and electronic industries, and the demand of silver powder for the most widely used noble metal powder in microelectronics is increased rapidly along with the rapid development of the microelectronics industry in recent decades.

In the related technology, a certain amount of polyvinylpyrrolidone (PVP) is required to be added as a dispersant and a protective agent in the silver powder preparation process, so that the sphericity and the particle size distribution of the silver powder are improved, finally, a large amount of waste water containing PVP is generated in the silver powder cleaning process, the waste water contains a large amount of PVP, ascorbic acid, sodium nitrate, vitamin C and other components, and as the PVP is uniformly dispersed in an aqueous solution, the waste water is not treated by a method at present, so that an effective method is urgently needed for treating the waste water, and how to invent a PVP recovery device in metal powder production waste water to improve the problems becomes a problem to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to compensate for above not enough, this application provides PVP recovery unit in the metal powder waste water, aims at improving the problem that waste water can't be handled.

The embodiment of the application provides a PVP recovery device in metal powder production wastewater, which comprises a conical PH adjusting tank, a ceramic ultrafiltration membrane system, a ceramic sodium filter membrane system and a PVP cleaning tank, wherein the conical PH adjusting tank is connected with a first feed pump through a first pipeline, the first feed pump is connected with a first circulating pump through a second pipeline, the first circulating pump is communicated with the ceramic ultrafiltration membrane system, a third pipeline is communicated between the ceramic ultrafiltration membrane system and the conical PH adjusting tank, a first circulating pipeline is communicated between the third pipeline and the second pipeline, a concentrated solution outlet pipe is communicated between the ceramic ultrafiltration membrane system and the PVP cleaning tank, the PVP cleaning tank is connected with a second feed pump through a fourth pipeline, the second feed pump is connected with a second circulating pump through a fifth pipeline, and the second circulating pump is communicated with the ceramic sodium filter membrane system, and a sixth pipeline is communicated between the ceramic sodium filter membrane system and the PVP cleaning tank, a second circulating pipeline is communicated between the sixth pipeline and the fifth pipeline, and a filtrate outlet pipe is communicated with the ceramic sodium filter membrane system.

In a specific embodiment, the first, second and third lines are provided with a first valve, a second valve and a third valve, respectively.

In a specific embodiment, a fourth valve, a fifth valve and a sixth valve are respectively disposed on the fourth pipeline, the fifth pipeline and the sixth pipeline.

The beneficial effect of this application: the membrane pore size is utilized to select the filtration effect, the pure physical separation is realized, the product structure is not influenced, the process is simple and reliable, and the large-scale production can be realized.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram of a filter structure of a PVP recovery apparatus in metal powder production wastewater provided in an embodiment of the present application.

In the figure: 1-a conical pH adjusting tank; 2-a ceramic ultrafiltration membrane system; 3-ceramic nanofiltration membrane system; 4-PVP cleaning tank; 5-a first feed pump; 6-a first circulation pump; 7-a second feed pump; 8-a second circulation pump; 9-a first valve; 10-a second valve; 11-a third valve; 12-a fourth valve; 13-a fifth valve; 14-sixth valve.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Please refer to fig. 1, the application provides a PVP recovery device in metal powder production wastewater, including toper PH equalizing basin 1, ceramic ultrafiltration membrane system 2, ceramic nanofiltration membrane system 3 and PVP washing tank 4, toper PH equalizing basin 1 is connected with first feed pump 5 through first tube coupling, first feed pump 5 is connected with first circulating pump 6 through the second tube coupling, first circulating pump 6 and ceramic ultrafiltration membrane system 2 intercommunication set up, the intercommunication has the third pipeline between ceramic ultrafiltration membrane system 2 and the toper PH equalizing basin 1.

The intercommunication has first circulation pipeline between third pipeline and the second pipeline, and the intercommunication has the concentrate exit tube between ceramic milipore filter system 2 and the PVP washs jar 4, and PVP washs jar 4 and is connected with second feed pump 7 through the fourth tube coupling, and second feed pump 7 has second circulating pump 8 through fifth tube coupling, and second circulating

pump

8 and 3 intercommunication settings of ceramic nanofiltration membrane system, and the intercommunication has the sixth pipeline between ceramic nanofiltration membrane system 3 and the PVP washs jar 4.

A second circulation pipeline is communicated between the sixth pipeline and the fifth pipeline, a filtrate outlet pipe is communicated with the ceramic nanofiltration membrane system 3, the first pipeline, the second pipeline and the third pipeline are respectively provided with a first valve 9, a second valve 10 and a third valve 11, and the fourth pipeline, the fifth pipeline and the sixth pipeline are respectively provided with a fourth valve 12, a fifth valve 13 and a sixth valve 14.

When specifically setting up, feed liquor gets into toper PH equalizing basin 1, adds sodium hydroxide regulating solution pH value to between 6-8, and in toper PH equalizing basin 1 upper portion feed liquid got into ceramic milipore filter system 2, the solid impurity in the interception feed liquid, in the filtrating got into PVP washs jar 4, in concentrate backward flow to toper PH equalizing basin 1, solid impurity subsides naturally, discharges from toper PH equalizing basin 1 bottom.

Wherein the membrane aperture range of the ceramic ultrafiltration membrane system 2 is 10-100nm, the membrane material is alumina, zirconia, titanium dioxide, silicon carbide and other ceramic materials, the ceramic ultrafiltration membrane system 2 adopts the cross flow filtration principle in operation, and the first circulating pump 6 provides the flow velocity tangent to the membrane surface for the feed liquid.

The ultrafiltration filtrate enters a PVP cleaning tank 4 and then enters a ceramic sodium filter membrane system 3, PVP in feed liquid is intercepted, components such as ascorbic acid, sodium nitrate, vitamin C and the like are not intercepted, PVP is concentrated, the filtrate of the ceramic sodium filter membrane system 3 enters a subsequent wastewater treatment system, and concentrated solution flows back to the PVP cleaning tank 4.

Wherein, the membrane aperture of the ceramic nanofiltration membrane system 3 is selected to be 1kd-10kd, the membrane material is ceramic material such as alumina, zirconia, titanium dioxide, silicon carbide and the like, the ceramic nanofiltration membrane system 3 adopts cross flow filtration principle in operation, and the second circulating pump 8 provides flow velocity tangent to the membrane surface for the feed liquid.

And adding ultrapure water into the PVP cleaning tank 4, diluting the PVP to a concentration less than 3%, introducing the diluted feed liquid into the ceramic sodium filter membrane system 3 again, repeating the operation for three times to reduce the concentrations of components such as ascorbic acid, sodium nitrate, vitamin C and the like in the feed liquid, repeating the operation for 4 and the operation for 5, reducing the conductivity reduction rate of the ceramic sodium filter membrane system to be less than 2, and making the content of other impurities in the prepared PVP solution less than 2 mg/L.

This PVP recovery unit's among metal powder waste water operating principle: adding a raw material liquid into a conical PH adjusting pool 1, opening a first valve 9 and a second valve 10, closing a third valve 11, conveying the raw material liquid into a ceramic ultrafiltration membrane system 2 through a first circulating pump 6 by using a first feeding pump 5, closing the second valve 10 and the third valve 11, enabling the raw material liquid to circularly flow through the ceramic ultrafiltration membrane system 2, intercepting solid impurities in the raw material liquid, enabling filtrate to enter a PVP (polyvinyl pyrrolidone) cleaning tank 4, opening the third valve 11 after multiple circulations, enabling a concentrated solution to flow back into the conical PH adjusting pool 1, naturally settling the solid impurities, and recycling.

Furthermore, ultrafiltration filtrate enters a PVP cleaning tank 4, a fourth valve 7 and a fifth valve 8 are punched, the ultrafiltration filtrate is pressurized through a second feed pump 7 and a second circulating pump 8 and enters a ceramic sodium filter membrane system 3, the fifth valve 13 and a sixth valve 14 are closed for circulating filtration, the PVP in the feed liquid is intercepted by the ceramic sodium filter membrane system 3, the feed liquid is discharged from the ceramic sodium filter membrane system 3, the sixth valve 14 is opened, PVP concentrated solution flows back to the PVP cleaning tank 4, ultrapure water is added into the PVP cleaning tank 4 to dilute the PVP concentration, the diluted feed liquid is introduced into the ceramic sodium filter membrane system 3 again and is repeated for three times, and the concentrations of components such as ascorbic acid, sodium nitrate and vitamin C in the feed liquid can be reduced.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The PVP recovery device in the metal powder production wastewater is characterized by comprising a conical PH adjusting tank (1), a ceramic ultrafiltration membrane system (2), a ceramic sodium filtration membrane system (3) and a PVP cleaning tank (4), wherein the conical PH adjusting tank (1) is connected with a first feeding pump (5) through a first pipeline, the first feeding pump (5) is connected with a first circulating pump (6) through a second pipeline, the first circulating pump (6) is communicated with the ceramic ultrafiltration membrane system (2), a third pipeline is communicated between the ceramic ultrafiltration membrane system (2) and the conical PH adjusting tank (1), a first circulating pipeline is communicated between the third pipeline and the second pipeline, a concentrated solution outlet pipe is communicated between the ceramic ultrafiltration membrane system (2) and the PVP cleaning tank (4), and the PVP cleaning tank (4) is connected with a second feeding pump (7) through a fourth pipeline, the second feeding pump (7) is connected with a second circulating pump (8) through a fifth pipeline, the second circulating pump (8) is communicated with the ceramic sodium filter membrane system (3), a sixth pipeline is communicated between the ceramic sodium filter membrane system (3) and the PVP cleaning tank (4), a second circulating pipeline is communicated between the sixth pipeline and the fifth pipeline, and a filtrate outlet pipe is communicated with the ceramic sodium filter membrane system (3).

2. The PVP recycling device for metal powder production wastewater as claimed in claim 1, wherein the first, second and third pipelines are provided with a first valve (9), a second valve (10) and a third valve (11), respectively.

3. The PVP recycling device for PVP in metal powder production wastewater according to claim 1, wherein a fourth valve (12), a fifth valve (13) and a sixth valve (14) are respectively arranged on the fourth pipeline, the fifth pipeline and the sixth pipeline.