Oily wastewater treatment device for chemical industry

Abstract

The utility model discloses an oily wastewater treatment device for chemical engineering. The oily wastewater treatment device comprises a solid-liquid separation unit, an electrolytic treatment unit, an ultrafiltration unit and a reverse osmosis unit, the solid-liquid separation unit is used for separating solids in the oily wastewater; the electrolytic treatment unit is used for receiving the liquid output by the separation unit and realizing electrolysis; the ultrafiltration unit is used for receiving the electrolyzed liquid and filtering for the first time; the reverse osmosis unit is used for receiving the liquid subjected to the first-time filtration treatment and realizing second-time filtration. According to the oily wastewater treatment device for the chemical industry, the electrolytic treatment unit is arranged in front of the ultrafiltration unit, so that the load of the ultrafiltration unit is reduced, and even if the oil content of oily wastewater is relatively high, the oily wastewater treatment device for the chemical industry also has a relatively good treatment effect; in addition, the solid-liquid separation unit is arranged in front of the electrolytic treatment unit, solids such as metal scraps in the oil-containing wastewater are separated out through the solid-liquid separation unit, and subsequent electrolytic treatment is prevented from being affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil-containing wastewater purification technical field especially relates to a chemical oil-containing wastewater treatment device. BACKGROUND

[0002] Oil-containing wastewater accounts for a very large proportion in industrial wastewater discharge, because oil-containing wastewater has large water volume and multiple sources, such as oil-containing wastewater generated by oil refineries, food and beverage industries, oil tank cleaning, and metal processing emulsified oil; the current equipment for treating oil-containing wastewater has poor treatment effect, such as the oil-containing wastewater treatment device disclosed in the prior art CN109311705A, which realizes secondary filtration treatment of oil-containing wastewater through a primary filter part and a secondary filter part; however, when the oil content of oil-containing wastewater is high, the load of the primary filter part is relatively large, and the treatment effect is not good, and the final water purification effect is not ideal. Therefore, it is necessary to improve the treatment effect of oil-containing wastewater. SUMMARY

[0003] Therefore, the utility model provides a chemical oil-containing wastewater treatment device, which aims to improve the treatment effect of oil-containing wastewater.

[0004] The scheme provided by the utility model comprises:

[0005] A chemical oil-containing wastewater treatment device comprises:

[0006] A solid-liquid separation unit for separating solids in oil-containing wastewater;

[0007] An electrolytic treatment unit receiving liquid output from the separation unit and realizing electrolysis;

[0008] An ultrafiltration unit receiving the liquid treated by electrolysis and realizing first filtration;

[0009] A reverse osmosis unit receiving the liquid treated by first filtration and realizing second filtration.

[0010] As a further optional scheme, a first sedimentation tank is arranged between the electrolytic treatment unit and the ultrafiltration unit.

[0011] As a further optional scheme, a second sedimentation tank is arranged between the ultrafiltration unit and the reverse osmosis unit.

[0012] As a further optional scheme, a first rack and a second rack are further included;

[0013] The solid-liquid separation unit, the electrolytic treatment unit, the first sedimentation tank, and the ultrafiltration unit are arranged on the first rack;

[0014] The second sedimentation tank and the reverse osmosis unit are arranged on the second rack;

[0015] In the first horizontal direction, the electrolytic treatment unit, the ultrafiltration unit, the second sedimentation tank and the reverse osmosis unit are arranged in sequence;

[0016] In the second horizontal direction, the electrolytic treatment unit and the first sedimentation tank are arranged in sequence;

[0017] The electrolytic treatment unit is arranged above the solid-liquid separation unit;

[0018] The first horizontal direction and the second horizontal direction are two mutually perpendicular directions on a horizontal plane.

[0019] As a further optional solution, the solid-liquid separation unit comprises a centrifuge.

[0020] As a further optional solution, the electrolytic treatment unit adopts a Ti / SnO2 electrode plate as an anode and a graphite plate as a cathode.

[0021] As a further optional solution, the ultrafiltration unit comprises a filter tank, the filter tank comprising a metal frame and a metal wall plate arranged on the metal frame, and an ultrafiltration membrane in the filter tank.

[0022] As a further optional solution, the reverse osmosis unit comprises a plurality of horizontally arranged tubular reverse osmosis membrane assemblies, the plurality of tubular reverse osmosis membrane assemblies being arranged in parallel and arranged in a vertical arrangement on the second rack, and the length direction of the tubular reverse osmosis membrane assemblies being arranged along the second horizontal direction.

[0023] Compared with the prior art, the chemical oily wastewater treatment device has at least the following beneficial effects:

[0024] The chemical oily wastewater treatment device has good treatment effect even if the oil content of the oily wastewater is high by arranging the electrolytic treatment unit before the ultrafiltration unit to reduce the load of the ultrafiltration unit. In addition, the solid-liquid separation unit is arranged before the electrolytic treatment unit, and the solid such as metal debris in the oily wastewater is separated out by the solid-liquid separation unit first, so as to avoid affecting the subsequent electrolytic treatment. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the chemical oily wastewater treatment device of the utility model;

[0026] Figure 2 is an explosion schematic view of the chemical oily wastewater treatment device of the utility model;

[0027] Figure 3It is a simple schematic view of the chemical oil-containing wastewater treatment device.

[0028] In the figure: 1, solid-liquid separation unit; 2, electrolytic treatment unit; 3, ultrafiltration unit; 31, filter tank; 32, ultrafiltration membrane; 4, reverse osmosis unit; 41, tubular reverse osmosis membrane assembly; 5, first sedimentation tank; 6, second sedimentation tank; 7, first rack; 8, second rack. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0030] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.

[0031] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0033] Reference Figures 1-3The utility model discloses an embodiment shows a kind of oily wastewater treatment device for chemical industry, including solid-liquid separation unit 1, electrolytic treatment unit 2, ultrafiltration unit 3 and reverse osmosis unit 4;The solid-liquid separation unit 1 is used to separate the solid in oily wastewater;Electrolytic treatment unit 2 receives liquid from the output of the separation unit and realizes electrolysis;Ultrafiltration unit 3 receives the liquid after electrolysis treatment and realizes first filtration;Reverse osmosis unit 4 receives the liquid after first filtration treatment and realizes second filtration.

[0034] Wherein, first by solid-liquid separation unit 1 separation solid in oily wastewater, for example, metal scrap, avoid affecting subsequent electrolysis treatment;Then by electrolytic treatment unit 2 to the oily wastewater of removing solid electrolysis treatment, by electrolysis generated metal ion and oil dirt occur flocculation, make oil drop coagulation and form larger flocculation, reduce the load of subsequent ultrafiltration unit 3, then by ultrafiltration unit 3 and reverse osmosis unit 4 carry out secondary filtration, realize the treatment to oily wastewater;Thus, the oily wastewater treatment device for chemical industry is by setting electrolytic treatment unit 2 before ultrafiltration unit 3, reduce the load of ultrafiltration unit 3, even if the oil content of oily wastewater is higher, the oily wastewater treatment device for chemical industry also has better processing effect.

[0035] Specifically, ultrafiltration unit 3 can remove the remaining oil in the electrolyzed oily wastewater, and then generate first filtration water;Reverse osmosis unit 4 further filters the first filtration water, and the low molecular weight impurities in the first filtration water.

[0036] Preferably, to facilitate the removal of larger flocculation formed after electrolysis of oily wastewater, a first sediment tank 5 is provided between the electrolytic treatment unit 2 and the ultrafiltration unit 3;The oily wastewater after electrolysis treatment is transported to the first sediment tank 5 for sedimentation, so that most of the flocculation in the oily wastewater is removed, facilitating the subsequent ultrafiltration unit 3 to finely filter the water quality, further reducing the load of the ultrafiltration unit 3, and improving the filtration efficiency of the ultrafiltration unit 3.

[0037] In addition, a second sediment tank 6 can be provided between the ultrafiltration unit 3 and the reverse osmosis unit 4, and the first filtration water output by the ultrafiltration unit 3 first enters the second sediment tank 6 for sedimentation, further improving the purity of the water quality, making the first filtration water entering the reverse osmosis unit 4 more pure, and enabling the second filtration water output by the reverse osmosis unit 4 to achieve an ideal purification effect, less than the discharge standard value of public water area.

[0038] Conventionally, the above-mentioned solid-liquid separation unit 1, electrolytic treatment unit 2, first sediment tank 5, ultrafiltration unit 3, second sediment tank 6 and reverse osmosis unit 4 are connected by pipelines and powered by pumps (not shown in the figure).

[0039] Specifically, the solid-liquid separation unit 1 includes a centrifuge, which uses centrifugal force generated by high-speed rotation to separate solids and liquids; the electrolysis treatment unit 2 can use a Ti / SnO2 electrode plate as the anode and a graphite plate as the cathode.

[0040] In some embodiments, to make the chemical oily wastewater treatment device small in size and footprint, and adaptable to the site limitations of small and medium-sized water plants, such as... Figure 1 and Figure 2 As shown, the device also includes a first frame 7 and a second frame 8; the solid-liquid separation unit 1, the electrolysis treatment unit 2, the first sedimentation tank 5, and the ultrafiltration unit 3 are mounted on the first frame 7; the second sedimentation tank 6 and the reverse osmosis unit 4 are mounted on the second frame 8; in a first horizontal direction, the electrolysis treatment unit 2, the ultrafiltration unit 3, the second sedimentation tank 6, and the reverse osmosis unit 4 are arranged sequentially; in a second horizontal direction, the electrolysis treatment unit 2 and the first sedimentation tank 5 are arranged sequentially; the electrolysis treatment unit 2 is positioned above the solid-liquid separation unit 1; wherein, the first horizontal direction and the second horizontal direction are two mutually perpendicular directions on a horizontal plane. This design makes the oily wastewater treatment device compact and occupies a small area.

[0041] In some embodiments, the solid-liquid separation unit 1, the electrolysis treatment unit 2, the first sedimentation tank 5 and the ultrafiltration unit 3 can be assembled into a prefabricated module by the first frame 7, and the second sedimentation tank 6 and the reverse osmosis unit 4 can be assembled into another prefabricated module by the second frame 8, which facilitates transportation to the site for rapid deployment.

[0042] Specifically, the ultrafiltration unit 3 includes a filter tank 31, the filter tank 31 includes a metal frame (not marked in the figure) and a metal wall panel (not marked in the figure) disposed on the metal frame, and an ultrafiltration membrane 32 is disposed inside the filter tank 31.

[0043] Specifically, such as Figure 2 As shown, the reverse osmosis unit 4 includes multiple horizontally arranged tubular reverse osmosis membrane assemblies 41. These tubular reverse osmosis membrane assemblies 41 are arranged in parallel and vertically on the second frame 8, with their length direction aligned along a second horizontal direction. This arrangement of the tubular reverse osmosis membrane assemblies 41 results in high filtration efficiency and a compact structure.

[0044] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0045] The above merely is the preferred implementation form of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. An oil-containing chemical wastewater treatment device characterized by comprising: The application relates to a device for treating oil-containing wastewater, comprising: a solid-liquid separation unit for separating solids in oil-containing wastewater; an electrolytic treatment unit receiving liquid output from the separation unit and realizing electrolysis; an ultrafiltration unit receiving electrolytically treated liquid and realizing first filtration; a reverse osmosis unit receiving liquid treated by first filtration and realizing second filtration.

2. The oil-containing chemical wastewater treatment device according to claim 1, characterized by Further comprising: a first sedimentation tank arranged between the electrolytic treatment unit and the ultrafiltration unit.

3. The oil-containing chemical wastewater treatment device according to claim 2, characterized by Further comprising: a second sedimentation tank arranged between the ultrafiltration unit and the reverse osmosis unit.

4. The oil-containing chemical wastewater treatment device according to claim 3, characterized in that : Further comprising a first rack and a second rack; the solid-liquid separation unit, the electrolytic treatment unit, the first sedimentation tank and the ultrafiltration unit are arranged on the first rack; the second sedimentation tank and the reverse osmosis unit are arranged on the second rack; in a first horizontal direction, the electrolytic treatment unit, the ultrafiltration unit, the second sedimentation tank and the reverse osmosis unit are arranged in sequence; in a second horizontal direction, the electrolytic treatment unit and the first sedimentation tank are arranged in sequence; the electrolytic treatment unit is arranged above the solid-liquid separation unit; wherein the first horizontal direction and the second horizontal direction are two mutually perpendicular directions on a horizontal plane.

5. The oil-containing chemical wastewater treatment device according to claim 4, characterized in that : The solid-liquid separation unit comprises a centrifuge.

6. The oil-containing chemical wastewater treatment device according to claim 4, characterized in that : The electrolytic treatment unit adopts a Ti / SnO2 electrode plate as an anode and a graphite plate as a cathode.

7. The oil-containing chemical wastewater treatment device according to claim 4, characterized in that : The ultrafiltration unit comprises a filter tank, the filter tank comprising a metal frame, a metal wall plate arranged on the metal frame and an ultrafiltration membrane in the filter tank.

8. The oil-containing chemical wastewater treatment device according to claim 4, characterized in that : The reverse osmosis unit comprises a plurality of horizontally arranged tubular reverse osmosis membrane assemblies, the plurality of tubular reverse osmosis membrane assemblies being arranged in parallel and arranged in a vertical arrangement on the second rack, and the length direction of the tubular reverse osmosis membrane assemblies being arranged along the second horizontal direction.

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