Device for treating and recycling wastewater generated after surface treatment of aluminum material

Abstract

The utility model relates to the field of water treatment equipment, in particular to a device for treating and recycling waste water after surface treatment of an aluminum material, which comprises a pretreatment unit, a dialysis unit, a separated liquid collecting tank and a separated water collecting tank, the dialysis unit is provided with a barrel body and a dialysis membrane core which divides the barrel body into an annular cavity, a purified water inlet and a separated water outlet are formed in the side wall of the barrel body, the pretreatment unit is arranged at the front end of the dialysis unit and is communicated with the dialysis unit through a pipeline with a suction pump, and the pretreatment unit can receive wastewater provided by an aluminum material surface treatment production line; the dialysis unit can separate out acidic water liquid and then feed the acidic water liquid into an aluminum material surface treatment production line for reuse. According to the wastewater treating and recycling device disclosed by the utility model, acidic water liquid in wastewater is separated out by utilizing the dialysis membrane prepared from the anion exchange membrane and purified water fed from the outer side of the dialysis membrane core, and then the acidic water liquid is directly fed back to a production line for cleaning and recycling, so that resources can be saved, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of water treatment equipment, in particular to a wastewater treatment and reuse device for the wastewater after the surface treatment of aluminum materials. Background Art

[0002] When the surface of aluminum materials is treated by anodic oxidation, water is needed for cleaning, and a certain amount of wastewater containing acid solution and aluminum ion complex will be generated during the cleaning process. At present, factories generally neutralize the wastewater with acid and alkali, and then separate the aluminum ion-containing substances by chemical precipitation, adsorption, electro-deposition, ion exchange or the like, and then reuse or discharge the water produced after acid-base neutralization. Although the acid solution in the wastewater can be reused or discharged as qualified water after being neutralized with alkali and the aluminum ions are separated, a large amount of alkaline substances need to be added during the neutralization process, which will increase the treatment cost; moreover, if these water solutions are reused for cleaning on the production line, acid solution needs to be added again, which will increase the input cost. Therefore, aluminum material factories have been hoping for a simple wastewater treatment and reuse device that can be installed beside the production line, which can separate the acid solution from the wastewater discharged at the production site after simple treatment and then directly send it back to the production line for cleaning and reuse to reduce the production cost. In view of this, this case is generated. Content of the Utility Model

[0003] To overcome the deficiencies in the prior art, the utility model discloses a wastewater treatment and reuse device for the wastewater after the surface treatment of aluminum materials, which includes a pretreatment unit, a dialysis unit, a separation liquid collection tank and a dialysis water collection tank. The pretreatment unit is provided with a bag filter and an oil-water separator, which can separate the particulate matter and floating oil in the wastewater after the surface treatment of aluminum materials. The dialysis unit is provided with a barrel body and a dialysis membrane core that divides the barrel body into an annular cavity, and a purified water inlet and a dialysis water liquid outlet are arranged on the side wall of the barrel body, which can precipitate the acid solution in the acidic water liquid containing aluminum ions. The pretreatment unit is placed at the front end of the dialysis unit and is connected by a pipeline with a suction pump. The pretreatment unit can receive the wastewater provided by the aluminum material surface treatment production line, and the dialysis unit can precipitate the acidic water liquid and then send it to the aluminum material surface treatment production line for reuse. The wastewater treatment and reuse device of the utility model uses the dialysis membrane prepared from an anion exchange membrane and the purified water sent into the outside of the dialysis membrane core to precipitate the acidic water liquid in the wastewater, and then directly send it back to the production line for cleaning and reuse, so as to save resources and reduce the production cost.

[0004] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] A wastewater treatment and reuse device for the surface treatment of aluminum materials, characterized in that: it includes a pretreatment unit and a dialysis unit. The pretreatment unit is provided with a filtering component and an oil-water separation component, which can separate particulate matter and floating oil in the wastewater after the surface treatment of aluminum materials. The dialysis unit is provided with a dialysis chamber and a precipitation chamber separated by an anion membrane component. A purified water input port is provided on the precipitation chamber. The dialysis unit can precipitate the acid solution in the wastewater after the surface treatment of aluminum materials. The pretreatment unit is placed at the front end of the dialysis unit and is connected by a pipeline with a suction pump. The pretreatment unit can receive the wastewater provided by the aluminum material surface treatment production line, and the dialysis unit can send the precipitated acidic water solution back to the aluminum material surface treatment production line for reuse.

[0006] The pretreatment unit includes a tank body, a bag filter and an oil-water separator, and the bag filter and the oil-water separator are both fixedly connected in the tank body.

[0007] The dialysis unit includes a barrel body and a dialysis membrane core, and the dialysis membrane core is placed in the middle of the barrel body.

[0008] The dialysis membrane core includes a core cylinder, a dialysis membrane and a separation liquid discharge port. The core cylinder is a circular cavity body with a conical funnel-shaped bottom, and the peripheral wall of the core cylinder is hollowed out. The dialysis membrane is embedded and fixedly connected tightly in the window holes of the hollowed-out peripheral wall of the core cylinder. The separation liquid discharge port is connected under the conical funnel at the bottom of the core cylinder, and an automatically opening and closing valve is provided at the separation liquid discharge port.

[0009] The dialysis membrane is prepared from an anion exchange membrane that allows the acid solution to precipitate.

[0010] The barrel body is a cylindrical cavity body with a barrel cover, and a through hole is provided at the center of its bottom. The bottom conical funnel of the core cylinder of the dialysis membrane core passes through the through hole at the bottom of the barrel body and is fixedly connected tightly with the bottom of the barrel body. The dialysis membrane core divides the inner cavity of the barrel body into an annular cavity.

[0011] A wastewater input port is provided in the middle of the barrel cover of the barrel body, and purified water inlets and a precipitated water solution outlet are scattered on the upper part of the side wall of the barrel body. The height of the precipitated water solution outlet is lower than the height of the purified water inlet, and the purified water inlet is connected to the external tap water pipe network.

[0012] The wastewater treatment and reuse device for the surface treatment of aluminum materials also includes a separation liquid collection pool and a precipitated water collection pool. The separation liquid collection pool and the precipitated water collection pool are both placed below the dialysis unit. The separation liquid discharge port is inserted into the separation liquid collection pool, and the precipitated water solution outlet is connected to the precipitated water collection pool by a pipeline.

[0013] The pretreatment unit and the dialysis membrane core of the dialysis unit are connected by a pipeline with a suction pump.

[0014] As can be seen from the above description, the advantages of the wastewater treatment and reuse device for the surface treatment of aluminum materials provided by the present utility model are as follows: The dialysis unit is arranged at the rear end of the pretreatment unit. A dialysis membrane core that divides the barrel body of the dialysis unit into an annular cavity is provided in the barrel body, and a purified water inlet is provided on the side wall of the barrel body. The acidic liquid in the wastewater is separated out by using the dialysis membrane prepared from an anion exchange membrane and the purified water fed into the outside of the dialysis membrane core, and then directly recycled to the production line for cleaning and reuse, thereby saving resources and reducing production costs. The present utility model is reasonably designed, has a simple structure, low cost, and is convenient for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a general schematic diagram of a wastewater treatment and reuse device for the surface treatment of aluminum materials according to the present utility model;

[0016] Figure 2 FIG. is an enlarged schematic diagram of the pretreatment unit;

[0017] Figure 3 FIG. is an enlarged schematic diagram of the dialysis unit;

[0018] Figure 4 FIG. is an enlarged schematic diagram of the dialysis membrane core.

[0019] REFERENCE SIGNS:

[0020] 1 Pretreatment unit; 11 Tank body; 12 Bag filter; 13 Oil-water separator; 2 Dialysis unit; 21 Barrel body; 211 Wastewater input port; 212 Purified water inlet; 213 Separated water liquid outlet; 22 Dialysis membrane core; 221 Core cylinder; 222 Dialysis membrane; 223 Separation liquid discharge port; 3 Separation liquid collection pool; 4 Separated water collection pool; 900 Aluminum material surface treatment production line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present utility model through specific embodiments.

[0022] As Figure 1As shown in the figure, a wastewater treatment and reuse device for the surface treatment of aluminum materials according to the present utility model includes a pretreatment unit 1, a dialysis unit 2, a separation liquid collection tank 3, and a dialysis water collection tank 4. The pretreatment unit 1 is provided with a filtering member and an oil-water separation member, which can separate particulate matter and floating oil in the wastewater after the surface treatment of aluminum materials. The dialysis unit 2 is provided with a dialysis chamber and a precipitation chamber separated by an anion membrane member, and a purified water input port is provided on the precipitation chamber. The dialysis unit 2 can precipitate the acid solution in the wastewater after the surface treatment of aluminum materials. The pretreatment unit 1 is placed at the front end of the dialysis unit 2, and the pretreatment unit 1 and the dialysis membrane core 22 of the dialysis unit 2 are connected by a pipeline with a suction pump. The pretreatment unit 1 can receive the wastewater provided by the aluminum material surface treatment production line 900, and the dialysis unit 2 can precipitate the acidic water solution and send it back to the aluminum material surface treatment production line 900 for reuse.

[0023] As Figures 1 to 2 shown in the figure, the pretreatment unit 1 of the present utility model includes a tank body 11, a bag filter 12, and an oil-water separator 13. The bag filter 12 and the oil-water separator 13 are both fixedly connected in the tank body 11.

[0024] As Figure 1 , Figure 3 and Figure 4 shown in the figure, the dialysis unit 2 of the present utility model includes a barrel body 21 and a dialysis membrane core 22. The dialysis membrane core 22 is placed in the middle of the barrel body 21. The dialysis membrane core 22 includes a core cylinder 221, a dialysis membrane 222, and a separation liquid discharge port 223. The core cylinder 221 is a circular cavity body with a conical funnel-shaped bottom, and the peripheral wall of the core cylinder 221 is hollowed out. The dialysis membrane 222 is embedded and tightly fixed in the window holes of the hollowed-out peripheral wall of the core cylinder 221. The separation liquid discharge port 223 is connected under the conical funnel at the bottom of the core cylinder 221, and the separation liquid discharge port 223 is provided with a valve that can be automatically opened and closed. The dialysis membrane 222 is prepared from an anion exchange membrane that allows the acid solution to precipitate. The barrel body 21 is a cylindrical cavity body with a barrel cover, and a through hole is provided at the center of its bottom. The bottom conical funnel of the core cylinder 221 of the dialysis membrane core 22 passes through the through hole at the bottom of the barrel body 21 and is tightly fixed to the bottom of the barrel body 21. The dialysis membrane core 22 divides the inner cavity of the barrel body 21 into an annular cavity. A wastewater input port 211 is provided in the middle of the barrel cover of the barrel body 21, and a purified water inlet 212 and a dialysis water liquid outlet 213 are scattered on the upper part of the side wall of the barrel body 21. The height of the dialysis water liquid outlet 213 is lower than the height of the purified water inlet 212, and the purified water inlet 212 is connected to the external tap water network. The separation liquid collection tank 3 and the dialysis water collection tank 4 are both placed below the dialysis unit 2. The separation liquid discharge port 223 is inserted into the separation liquid collection tank 3, and the dialysis water liquid outlet 213 is connected to the dialysis water collection tank 4 by a pipeline.

[0025] The usage method of a wastewater treatment and reuse device for the surface treatment of aluminum materials described in this utility model is as follows:

[0026] The wastewater is fed from the aluminum material surface treatment production line 900 into the bag filter 12 of the pretreatment unit 1 to filter out particulate matter and suspended solids, and then the floating oil is removed through the oil-water separator 13. Then, the pretreated wastewater is pumped to the dialysis membrane core 22 of the dialysis unit 2. The control valve of the tap water network connected to the purified water inlet 212 is opened, and purified water is continuously fed into the annular cavity separated by the dialysis membrane core 22 in the barrel body 21 of the dialysis unit 2. By utilizing the concentration difference of the acid solution inside and outside the dialysis membrane core 22 and the selective permeability function of the anion exchange membrane, the acid solution in the wastewater will dialyze from the inner cavity of the dialysis membrane core 22 to the outside and enter the annular cavity of the barrel body 21. The separated water liquid overflows from the separated water liquid outlet 213 along with the tap water liquid and flows into the separated water collection pool 4 for collection, and then is recycled to the aluminum material surface treatment production line 900 for reuse; the separation liquid containing aluminum ions in the dialysis membrane core 22 can be discharged into the separation liquid collection pool 3 through the separation liquid discharge port 223, and the aluminum resources can be extracted by other facilities.

[0027] For the wastewater treatment and reuse device of this utility model, the dialysis unit 2 is arranged at the rear end of the pretreatment unit 1. A dialysis membrane core 22 that divides the barrel body 21 into an annular cavity is arranged in the barrel body 21 of the dialysis unit 2, and a purified water inlet 212 is provided on the side wall of the barrel body 21. The acidic water liquid in the wastewater is separated out by using the dialysis membrane 222 prepared from the anion exchange membrane and the purified water fed from the outside of the dialysis membrane core 22, and then directly recycled to the production line for cleaning and reuse, thereby saving resources and reducing production costs.

[0028] The above is only a specific embodiment of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantive modification made to this utility model using this concept shall fall within the scope of infringement of the protection scope of this utility model.

Claims

1. A wastewater treatment and reuse device after aluminum surface treatment, characterized in that: The invention comprises a pre-treatment unit (1) and a dialysis unit (2). The pre-treatment unit (1) is provided with a filtering component and an oil-water separation component, which can separate particulate matter and floating oil in wastewater after aluminum surface treatment. The dialysis unit (2) is provided with a dialysis chamber and a precipitation chamber separated by an anion membrane component. A clean water input port is provided on the precipitation chamber. The dialysis unit (2) can precipitate acid in the wastewater after aluminum surface treatment. The pre-treatment unit (1) is placed at the front end of the dialysis unit (2) and is connected by a pipeline with a suction pump.

2. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 1, characterized in that: The pre-treatment unit (1) comprises a tank body (11), a bag filter (12) and an oil-water separator (13), and the bag filter (12) and the oil-water separator (13) are both fixedly connected in the tank body (11).

3. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 2, characterized in that: The dialysis unit (2) comprises a barrel body (21) and a dialysis membrane core (22), and the dialysis membrane core (22) is placed in the middle of the barrel body (21).

4. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 3, characterized in that: The dialysis membrane core (22) comprises a core tube (221), a dialysis membrane (222) and a separation liquid discharge port (223); the core tube (221) is a circular hollow body with a conical funnel-shaped bottom; the peripheral wall of the core tube (221) is hollowed out; the dialysis membrane (222) is embedded in and fixedly connected to the window hole hollowed out in the peripheral wall of the core tube (221); the separation liquid discharge port (223) is connected under the conical funnel at the bottom of the core tube (221); and the separation liquid discharge port (223) is provided with a valve.

5. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 4, characterized in that: The dialysis membrane (222) is prepared from anion exchange membrane.

6. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 4, characterized in that: The barrel body (21) is a cylindrical hollow body provided with a barrel cover, and a through hole is provided at the center of the bottom thereof. The bottom conical funnel of the core tube (221) of the dialysis membrane core (22) passes through the through hole at the bottom of the barrel body (21) and is fixedly connected to the bottom of the barrel body (21). The dialysis membrane core (22) divides the inner cavity of the barrel body (21) into an annular cavity.

7. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 6, characterized in that: A wastewater inlet (211) is provided in the middle of the barrel cover of the barrel body (21), and a clean water inlet (212) and a precipitated water outlet (213) are provided on the upper part of the side wall of the barrel body (21), wherein the height of the precipitated water outlet (213) is lower than the height of the clean water inlet (212).

8. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 7, characterized in that: It also includes a separation liquid collection tank (3) and a precipitation water collection tank (4), wherein the separation liquid collection tank (3) and the precipitation water collection tank (4) are both placed below the dialysis unit (2), the separation liquid discharge port (223) is inserted into the separation liquid collection tank (3), and the precipitation water outlet (213) is connected to the precipitation water collection tank (4) by a pipeline.

9. The device for treating and reusing wastewater after surface treatment of aluminum materials according to claim 8, characterized in that: The pre-treatment unit (1) is connected to the dialysis membrane core (22) of the dialysis unit (2) via a pipeline with a suction pump.

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