Wastewater treatment device

Abstract

The utility model relates to a wastewater treatment device. The wastewater treatment device comprises a rinsing tank for containing wastewater; the water storage tank is communicated with the rinsing tank and is used for storing wastewater; the liquid inlet end of the first-stage reverse osmosis membrane assembly is communicated with the rinsing tank; the concentrated water outlet is communicated with the water storage tank; the liquid inlet end of the second-stage reverse osmosis membrane assembly is communicated with the fresh water outlet end of the first-stage reverse osmosis membrane assembly, the fresh water outlet end of the second-stage reverse osmosis membrane assembly is communicated with the rinsing tank, and the concentrated water outlet of the second-stage reverse osmosis membrane assembly is communicated with the liquid inlet end of the first-stage reverse osmosis membrane assembly. According to the utility model, the first-stage reverse osmosis membrane assembly can improve the water return rate of wastewater, the second-stage reverse osmosis membrane assembly is combined to treat the wastewater, the treated fresh water is directly supplemented into the rinsing tank from the outlet, no other chemicals are added, the amount of impurities in the supplemented fresh water outlet is small, and the subsequent use is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment device. Background Art

[0002] Electroplating is a basic industry in the process of industrial production and manufacturing. It is widely used in industries such as electronics, hardware, and machinery that require surface treatment of products to achieve basic needs such as corrosion resistance, wear resistance, conductivity, and decoration. It is an indispensable part of the process of industrial upgrading and structural adjustment. Due to the diversity of products and differences in performance requirements, the wastewater generated in the electroplating production process generally has the characteristics of a wide variety of pollutants, high pollutant concentrations, and large fluctuations in water quality.

[0003] The wastewater treatment device in the prior art usually collects various types of wastewater and then processes them through sedimentation, filtration, and membrane equipment. The treatment process is complicated, the amount of chemicals added is large, the wastewater treatment load is high, and the recycled water contains a variety of impurities, which affects the subsequent use of the recycled water. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a wastewater treatment device, which solves the technical problems in the prior art that the treatment process is complicated, the dosage is large, and the recycled water contains a variety of impurities, which affects the subsequent use of the recycled water.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] A wastewater treatment device, comprising:

[0009] Rinsing tanks, water storage tanks, primary reverse osmosis membrane modules and secondary reverse osmosis membrane modules for holding wastewater;

[0010] The water inlet end of the water storage tank is connected to the rinsing tank;

[0011] The liquid inlet end of the first-stage reverse osmosis membrane assembly is connected to the rinsing tank; the concentrated water outlet is connected to the water storage tank, and the fresh water outlet is connected to the liquid inlet end of the second-stage reverse osmosis membrane assembly;

[0012] The fresh water outlet end of the secondary reverse osmosis membrane assembly is communicated with the rinsing tank, and the concentrated water outlet end of the secondary reverse osmosis membrane assembly is communicated with the liquid inlet end of the primary reverse osmosis membrane assembly.

[0013] Preferably, it also includes a microfilter for filtering impurities in the wastewater;

[0014] The liquid inlet end of the microfilter is communicated with the water storage tank, and the liquid discharge end is communicated with the liquid inlet end of the first-stage reverse osmosis membrane assembly.

[0015] Preferably, it also includes a high-pressure pump group, the liquid inlet end of the high-pressure pump group is connected to the liquid discharge end of the microfiltration machine and the concentrated water outlet of the secondary reverse osmosis membrane assembly, and the liquid discharge end of the high-pressure pump group is connected to the liquid inlet end of the primary reverse osmosis membrane assembly.

[0016] Preferably, the high-pressure pump group includes two high-pressure pumps connected in series.

[0017] Preferably, it also includes a regulating valve group for discharging concentrated water in the first-stage reverse osmosis membrane assembly out of the wastewater treatment device;

[0018] One end of the regulating valve group is communicated with the concentrated water outlet of the first-stage reverse osmosis membrane assembly, and the other end is communicated with the water storage tank.

[0019] Preferably, the regulating valve group includes a manual regulating valve and an automatic regulating valve connected in parallel.

[0020] Preferably, it further comprises a first conductivity meter, wherein the first conductivity meter is installed between the regulating valve group and the first-stage reverse osmosis membrane assembly.

[0021] Preferably, it further comprises a first flow meter and a second conductivity meter, wherein the first flow meter and the second conductivity meter are both installed between the water storage tank and the rinsing tank.

[0022] Preferably, it further comprises a third conductivity meter, which is installed at the fresh water outlet end of the secondary reverse osmosis membrane assembly.

[0023] Preferably, the wastewater treatment device is applied to electroplating wastewater treatment.

[0024] (III) Beneficial effects

[0025] The beneficial effects of the utility model are:

[0026] The utility model can improve the return rate of wastewater through the primary reverse osmosis membrane component and treat the wastewater in combination with the secondary reverse osmosis membrane component, and the treated fresh water outlet is directly replenished into the rinsing tank without adding other reagents, and the replenished fresh water outlet has less impurities and does not affect subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the wastewater treatment device of the utility model.

[0028] [Description of Reference Numerals]

[0029] 1: rinsing tank; 2: water storage tank; 3: high-pressure pump group; 4: first-stage reverse osmosis membrane assembly; 5: second-stage reverse osmosis membrane assembly; 6: first flow meter; 7: second conductivity meter; 8: third conductivity meter; 9: first conductivity meter; 10: manual regulating valve; 11: automatic regulating valve; 12: microfiltration machine. DETAILED DESCRIPTION

[0030] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0031] Example

[0032] The wastewater treatment device in the utility model can be used for electroplating wastewater treatment, and can also be used for wastewater treatment in industries such as metallurgy, electronics, chemical industry, leather making, printing, power generation, coating machine waste incineration, etc. In this embodiment, electroplating wastewater treatment is taken as an example.

[0033] like Figure 1 As shown, a wastewater treatment device comprises: a rinsing tank 1 for rinsing electroplating workpieces, a water storage tank 2 connected to the rinsing tank 1, a primary reverse osmosis membrane assembly 4 and a secondary reverse osmosis membrane assembly 5. The liquid inlet end of the primary reverse osmosis membrane assembly 4 is connected to the rinsing tank 1, the concentrated water outlet is connected to the water storage tank 2, the liquid inlet end of the secondary reverse osmosis membrane assembly 5 is connected to the fresh water outlet end of the primary reverse osmosis membrane assembly 4, the fresh water outlet end of the secondary reverse osmosis membrane assembly 5 is connected to the rinsing tank 1, and the concentrated water outlet of the secondary reverse osmosis membrane assembly 5 is connected to the liquid inlet end of the primary reverse osmosis membrane assembly 4.

[0034] When the utility model is used, the waste water in the rinsing tank 1 enters the water storage tank 2, the waste water in the water storage tank 2 enters the primary reverse osmosis membrane assembly 4 for filtration, the fresh water filtered by the primary reverse osmosis membrane assembly 4 enters the secondary reverse osmosis membrane assembly 5, the concentrated water filtered by the primary reverse osmosis membrane assembly 4 flows back to the water storage tank 2, the waste water in the water storage tank 2 enters the disc-tube reverse osmosis assembly 4 for filtration, and this is repeated many times. The fresh water filtered by the secondary reverse osmosis membrane assembly 5 flows into the rinsing tank 1, the concentrated water filtered by the secondary reverse osmosis membrane assembly 5 flows into the primary reverse osmosis membrane assembly 4, and is filtered by the primary reverse osmosis membrane assembly 4 again.

[0035] Furthermore, in this embodiment, the wastewater of the rinsing tank 1 overflows into the water storage tank 2. And the reverse osmosis membrane assembly 4 is a disc-tube reverse osmosis membrane assembly, and the secondary reverse osmosis membrane assembly 5 is a brackish water reverse osmosis membrane assembly.

[0036] like Figure 1As shown, specifically, the wastewater treatment device also includes a microfilter 12 and a high-pressure pump group 3 for filtering impurities in the wastewater. The liquid inlet end of the microfilter 12 is connected to the water storage tank 2, and the liquid discharge end is connected to the liquid inlet end of the primary reverse osmosis membrane assembly 4. The liquid inlet end of the high-pressure pump group 3 is connected to the liquid discharge end of the microfilter 12 and the concentrated water outlet of the secondary reverse osmosis membrane assembly 5, and the liquid discharge end of the high-pressure pump group 3 is connected to the liquid inlet end of the primary reverse osmosis membrane assembly 4. The water-insoluble impurities in the wastewater are filtered out by the microfilter 12 to prevent the water-insoluble impurities from clogging the primary reverse osmosis membrane assembly 4. The wastewater filtered by the microfilter 12 is pressurized by the high-pressure pump group 3 so that the wastewater can be discharged into the primary reverse osmosis membrane assembly 4.

[0037] Furthermore, the high-pressure pump group 3 includes two high-pressure pumps connected in series, and the head of the wastewater discharged through the discharge end of the high-pressure pump group 3 can reach 450m.

[0038] like Figure 1 As shown, the wastewater treatment device also includes a regulating valve group for discharging concentrated water in the primary reverse osmosis membrane assembly 4 out of the wastewater treatment device; one end of the regulating valve group is connected to the concentrated water outlet of the primary reverse osmosis membrane assembly 4, and the other end is connected to the water storage tank 2. In this embodiment, the regulating valve group includes a manual regulating valve 10 and an automatic regulating valve 11 connected in parallel.

[0039] Specifically, when the conductivity of the concentrated water discharged from the primary reverse osmosis membrane assembly 4 reaches a set value, the concentrated water discharged from the primary reverse osmosis membrane assembly 4 is discharged to a collection box outside the wastewater treatment device through a manual regulating valve 10 or an automatic regulating valve 11. The wastewater in the rinsing tank 1 enters the water storage tank 2 to be treated by the primary reverse osmosis membrane assembly 4 and the secondary reverse osmosis membrane assembly 5.

[0040] like Figure 1 As shown, the wastewater treatment device further includes a first conductivity meter 9, a first flow meter 6, a second conductivity meter 7 and a third conductivity meter 8. The first conductivity meter 9 is installed between the regulating valve group and the primary reverse osmosis membrane assembly 4. The first flow meter 6 and the second conductivity meter 7 are both installed between the water storage tank 2 and the rinsing tank 1. The third conductivity meter 8 is installed at the fresh water outlet end of the secondary reverse osmosis membrane assembly 5. The conductivity meter can be used to conveniently detect the conductivity of water at various locations in the wastewater treatment device, so as to facilitate the operation of various components of the wastewater treatment device.

[0041] When the utility model is used, the waste water in the rinsing tank 1 enters the water storage tank 2, the waste water in the water storage tank 2 is filtered by the microfilter 12, and then pressurized by the high-pressure pump group 3 to enter the first-level reverse osmosis membrane assembly 4 for filtration, the fresh water filtered by the first-level reverse osmosis membrane assembly 4 enters the second-level reverse osmosis membrane assembly 5, the concentrated water filtered by the first-level reverse osmosis membrane assembly 4 flows back to the water storage tank 2, and the waste water in the water storage tank 2 enters the disc-tube reverse osmosis assembly 4 for filtration, and this is repeated many times. The fresh water filtered by the second-level reverse osmosis membrane assembly 5 flows into the rinsing tank 1, and the concentrated water filtered by the second-level reverse osmosis membrane assembly 5 flows into the first-level reverse osmosis membrane assembly 4, and is filtered by the first-level reverse osmosis membrane assembly 4 again.

[0042] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0045] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A wastewater treatment device, characterized in that: include: A rinsing tank (1) for containing waste water, a water storage tank (2), a primary reverse osmosis membrane assembly (4) and a secondary reverse osmosis membrane assembly (5); The water inlet end of the water storage tank (2) is connected to the rinsing tank (1); The liquid inlet end of the first-stage reverse osmosis membrane assembly (4) is connected to the rinsing tank (1); the concentrated water outlet is connected to the water storage tank (2), and the fresh water outlet is connected to the liquid inlet end of the second-stage reverse osmosis membrane assembly (5); The fresh water outlet end of the secondary reverse osmosis membrane assembly (5) is in communication with the rinsing tank (1), and the concentrated water outlet end of the secondary reverse osmosis membrane assembly (5) is in communication with the liquid inlet end of the primary reverse osmosis membrane assembly (4).

2. The wastewater treatment device according to claim 1, characterized in that: Also included is a microfilter (12) for filtering impurities in the wastewater; The liquid inlet end of the microfilter (12) is in communication with the water storage tank (2), and the liquid discharge end is in communication with the liquid inlet end of the first-stage reverse osmosis membrane assembly (4).

3. The wastewater treatment device according to claim 2, characterized in that: It also comprises a high-pressure pump group (3), the liquid inlet end of the high-pressure pump group (3) is connected to the liquid discharge end of the microfilter (12) and the concentrated water outlet of the secondary reverse osmosis membrane assembly (5), and the liquid discharge end of the high-pressure pump group (3) is connected to the liquid inlet end of the primary reverse osmosis membrane assembly (4).

4. The wastewater treatment device according to claim 3, characterized in that: The high-pressure pump group (3) comprises two high-pressure pumps connected in series.

5. The wastewater treatment device according to claim 1, characterized in that: It also includes a regulating valve group for discharging concentrated water in the first-stage reverse osmosis membrane assembly (4) out of the wastewater treatment device; One end of the regulating valve group is connected to the concentrated water outlet of the first-stage reverse osmosis membrane assembly (4), and the other end is connected to the water storage tank (2).

6. The wastewater treatment device according to claim 5, characterized in that: The regulating valve group comprises a manual regulating valve (10) and an automatic regulating valve (11) connected in parallel.

7. The wastewater treatment device according to claim 6, characterized in that: It also comprises a first conductivity meter (9), wherein the first conductivity meter (9) is installed between the regulating valve group and the first-stage reverse osmosis membrane assembly (4).

8. The wastewater treatment device according to claim 1, characterized in that: It also comprises a first flow meter (6) and a second conductivity meter (7), wherein the first flow meter (6) and the second conductivity meter (7) are both installed between the water storage tank (2) and the rinsing tank (1).

9. The wastewater treatment device according to claim 1, characterized in that: It also comprises a third conductivity meter (8), which is installed at the fresh water outlet end of the secondary reverse osmosis membrane assembly (5).

10. The wastewater treatment device according to any one of claims 1 to 9, characterized in that: The wastewater treatment device is used for electroplating wastewater treatment.

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