Efficient oil-water separation device based on graphene

Abstract

The utility model discloses an efficient oil-water separation device based on graphene. The efficient oil-water separation device comprises a sludge scraper, a sludge tank, a graphene filter, an oil collecting tank and a clear water tank, a water inlet of the sludge scraper is connected with a raw water pool, a water outlet is connected with the middle water tank, an oil outlet is connected with the oil collecting tank, and a sludge outlet is connected with the sludge tank; a first inlet of the graphene filter is connected with the middle water tank and is used for receiving filtered wastewater, a first outlet of the graphene filter is connected with the oil collecting tank and is used for discharging an oil phase, and a second outlet of the graphene filter is connected with a water inlet of the clear water tank and is used for discharging clear water; a second outlet of the graphene filter is connected with a water outlet of the clear water tank and is used for backwashing. The sludge scraper is arranged to separate sludge from oil and water, and the graphene filter is arranged to separate oil and water, so that the oil-water separator is rapid, efficient, high in separation efficiency and good in stability, and various oil-water mixtures can be effectively separated.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil water separation technical field, concretely is a kind of high-efficiency oil water separation device based on graphene. BACKGROUND

[0002] With the rapid development of industry and the improvement of people's living standards, the discharge of oily wastewater is increasing. Traditional oil-water separation methods, such as gravity separation, centrifugal separation, chemical demulsification, etc., have low separation efficiency, high energy consumption, and easy to cause secondary pollution. Therefore, it is of great practical significance to develop an efficient, energy-saving and environmentally friendly oil-water separation technology. SUMMARY

[0003] To solve the defects of the prior art, the utility model provides a kind of high-efficiency oil water separation device based on graphene, the utility model sets up sludge scraper and separates sludge and oil-water, sets up graphene filter and separates oil-water, is fast and efficient, high separation efficiency and good stability, can effectively separate various types of oil-water mixture.

[0004] To achieve the above technical purpose, the utility model adopts the following technical scheme: a kind of high-efficiency oil water separation device based on graphene, including sludge scraper, sludge tank, graphene filter, oil collection tank, clean water tank;

[0005] The water inlet of the sludge scraper is connected to the raw water pool, the water outlet is connected to the intermediate water tank, the oil outlet is connected to the oil collection tank, and the sludge outlet is connected to the sludge tank;

[0006] The first inlet of the graphene filter is connected to the intermediate water tank for receiving filtered wastewater, the first outlet of the graphene filter is connected to the oil collection tank for discharging oil phase, the second outlet of the graphene filter is connected to the water inlet of the clean water tank for discharging clean water, and the second outlet of the graphene filter is connected to the water outlet of the clean water tank for backwashing.

[0007] The graphene filter is internally provided with a graphene filter membrane, and the graphene filter membrane is stacked by multiple layers of graphene.

[0008] Further comprising a pump set, the pump set comprising a raw water pump, a filter booster pump, an oil pump, a backwash water pump, a recycled water pump and a sludge pump, the raw water pump being connected to the water inlet of the sludge scraper and the raw water pool, the filter booster pump being connected to the first outlet of the graphene filter and the intermediate water tank, the oil pump being connected to the oil collection tank, the backwash water pump being connected to the second outlet of the graphene filter and the water outlet of the clean water tank, the recycled water pump being connected to the drain of the clean water tank, and the sludge pump being connected to the sludge outlet of the sludge tank and the deslagging machine.

[0009] The entrance of the mud scraper is further provided with a container tank, the entrance of the container tank is connected with the gas storage tank and a nano micro-bubble generator dissolved air water pump, and the entrance of the nano micro-bubble generator dissolved air water pump is connected with the outlet of the mud scraper.

[0010] The outlet of the mud scraper is further connected with a nano micro-bubble generator sludge discharge pump, and the outlet of the nano micro-bubble generator sludge discharge pump is connected with the sludge tank.

[0011] In conclusion, the utility model achieves the following technical effects:

[0012] The utility model discloses a graphene filter membrane has high separation efficiency and good stability, can effectively separate various types of oil-water mixture, and separation process does not need to add chemical reagent, avoids secondary pollution, and the device structure is simple, convenient operation, easy maintenance and popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a kind of high-efficiency oil-water separation device based on graphene;

[0014] Figure 2 It is the schematic diagram of graphene filter. DETAILED DESCRIPTION

[0015] The utility model will be further described in detail in connection with the drawings.

[0016] The embodiment is merely the explanation of the utility model, and it is not the limitation of the utility model, and the person skilled in the art can make the modification without the creative contribution according to the needs after reading the present specification, but as long as in the right claim range of the utility model, it is protected by patent law.

[0017] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on 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 cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model.

[0018] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0019] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an 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.

[0021] Embodiment:

[0022] Figure 1 It is a kind of high-efficiency oil-water separation device based on graphene, including mud scraper 12, sludge tank 15, graphene filter 4, oil collection tank 6, clean water tank 8;The present application sets up mud scraper 12 and separates sludge and oil-water, sets up graphene filter 4 and separates oil-water, fast and efficient.

[0023] The water inlet of the mud scraper 12 is connected to the raw water pool 1, the water outlet is connected to the intermediate water tank 3, the oil outlet is connected to the oil collection tank 6, and the sludge outlet is connected to the sludge tank 15;

[0024] The inlet of the mud scraper 12 is further provided with a container tank 19, the inlet of the container tank 19 is connected to the gas storage tank 11 and the nano micro-bubble generator dissolved air water pump 13, and the inlet of the nano micro-bubble generator dissolved air water pump 13 is connected to the outlet of the mud scraper 12.

[0025] The outlet of the mud scraper 12 is also connected with a nanometer micro-bubble generator sludge pump 14, and the outlet of the nanometer micro-bubble generator sludge pump 14 is connected with the sludge tank 15.

[0026] Figure 2 is a schematic view of a graphene filter 4, a first inlet 401 of the graphene filter 4 is connected with the intermediate water tank 3 for receiving filtered wastewater, a first outlet 403 of the graphene filter 4 is connected with the oil collection tank 6 for discharging an oil phase, a second outlet 404 of the graphene filter 4 is connected with a water inlet of the clean water tank 8 for discharging clean water, and the second outlet 404 of the graphene filter 4 is connected with a water outlet of the clean water tank 8 for backwashing.

[0027] The graphene filter 4 is internally provided with a graphene filter membrane, the graphene filter membrane is stacked by multiple layers of graphene, and the surface of the graphene filter membrane is subjected to an oleophilic modification treatment, so that the graphene filter membrane can effectively adsorb the oil phase and repel the water phase.

[0028] Further, a pump set is included, the pump set includes a raw water pump 2, a filter lifting pump 5, an oil conveying pump 7, a backwashing water pump 9, a reused water pump 10, and a sludge pump 16, the raw water pump 2 is connected with a water inlet of the raw water tank 1 and a water inlet of the mud scraper 12, the filter lifting pump 5 is connected with the intermediate water tank 3 and the first inlet 401 of the graphene filter 4, the oil conveying pump 7 is connected with the oil collection tank 6, the backwashing water pump 9 is connected with a water outlet of the clean water tank 8 and the second outlet 404 of the graphene filter 4, the reused water pump 10 is connected with a water outlet of the clean water tank 8, and the sludge pump 16 is connected with a sludge outlet of the sludge tank 15 and a deslagging machine 18.

[0029] All the pumps of the pump set are in a one-for-one standby mode.

[0030] Graphene is a new type of two-dimensional nanomaterial, and has excellent physical and chemical properties, such as a high specific surface area, good electrical conductivity, and oleophilicity, and has great application potential in the field of oil-water separation.

[0031] The graphene filter 4 is also connected with a pressure control system for controlling the pressure in a separation chamber, so as to promote the oil-water separation process.

[0032] The pre-treatment device mud scraper and dissolved air pump of the present application are automatically controlled. The graphene filter lifting pump is controlled by the high and low liquid levels in the intermediate water tank, and is in a one-for-one standby mode, so that if one pump fails, the other pump can automatically run. The backwashing water pump is controlled by the high and low liquid levels in the backwashing water tank and is time-controlled. The graphene filter is one or more, and each two graphene filters form a group. The interval operation time between each group is set according to the actual water sample on site. When one group of graphene filters switches to another group, the previous group automatically backwashes, and the backwashing pump starts while the original water inlet valve is automatically closed.

[0033] The oil and mud scraped by the mud scraper flows into the dirty oil tank, and when the oil in the dirty oil tank reaches a certain height, it flows back into the oil collecting tank, the oil level of the oil collecting tank is controlled by the ultrasonic liquid level, and the oil pump is controlled according to the oil level of the oil collecting tank. The mud amount is started according to the site, and the flocculation device, the flushing water pump, the mud pump and the drainage pump are started at the same time.

[0034] The oil-water mixture to be separated is introduced into the separation chamber through the liquid inlet; the pressure control system is started to form a certain pressure difference in the separation chamber, so as to promote the oil-water mixture to pass through the graphene filter membrane; the oil phase is discharged through the oil outlet under the adsorption of the graphene filter membrane; and the water phase passes through the graphene filter membrane and is discharged from the water outlet.

[0035] Working principle:

[0036] The raw water pump 2 pumps the raw water in the raw water pool 1 into the mud scraper 12, at the same time, the container tank 19 inputs the mud scraper 12 with dissolved gas, the mud scraper works with the dissolved gas to separate the sludge and oil-water, the sludge is discharged to the sludge tank 15 through the nano micro-bubble generator and the sludge pump 14, the oil phase enters the oil collecting tank 6, and the oil-containing wastewater enters the intermediate water tank 3; the sludge deposited in the intermediate water tank 3 is discharged to the sludge tank 15;

[0037] The filter booster pump 5 pumps the wastewater in the intermediate water tank 3 into the first inlet 401 of the graphene filter 4, after filtration through the graphene filter membrane, the oil phase enters the oil collecting tank 6 from the first outlet 403, and the clean water enters the clean water tank 8 from the second outlet 404; during backwashing, the backwashing water pump 9 connects the water outlet of the clean water tank 8 and the second outlet 404 of the graphene filter 4 for backwashing, and the backwashing water enters the raw water pool 1 from the first outlet 402; the water in the clean water tank 8 is discharged through the reclaimed water pump 10; and the oil tank of the oil collecting tank 6 is discharged through the oil pump 7;

[0038] The sludge in the sludge tank 15 is sent to the slag discharger 18 through the sludge pump 16, the slag discharger 18 also injects clean water, the mixed clean water is deposited and then sent to the raw water pool 1, and the dosing device 17 is used for dosing the slag discharger 18 to discharge the dregs.

[0039] Example 1

[0040] Taking the oil-containing wastewater discharged by a certain petrochemical plant as an example, the oil content is 1000 mg / L. The wastewater is introduced into the separation chamber through the liquid inlet, and the pressure control system is controlled to make the pressure in the separation chamber 0.5 MPa. After being treated by the oil-water separation device, the oil content in the oil phase discharged from the oil outlet is greater than 95%, and the oil content in the water phase discharged from the water outlet is less than 5 mg / L, reaching the national discharge standard.

[0041] Example 2

[0042] The oil-containing wastewater discharged by a catering enterprise is treated, wherein the oil content is 500 mg / L. The oil-water separation device is used to separate under the condition that the pressure in the separation chamber is 0.3 MPa. After the treatment, the oil content in the oil phase discharged from the oil outlet is greater than 90%, and the oil content in the water phase discharged from the water outlet is less than 10 mg / L, so that a good oil-water separation effect is achieved.

[0043] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments are within the scope of the technical scheme of the present application.

Claims

1. A graphene-based high-efficiency oil-water separation device, characterized in that: The mud scraper (12), the sludge tank (15), the graphene filter (4), the oil collection tank (6), and the clean water tank (8); The water inlet of the mud scraper (12) is connected to the raw water tank (1), the water outlet is connected to the intermediate water tank (3), the oil outlet is connected to the oil collection tank (6), and the sludge outlet is connected to the sludge tank (15). The first inlet (401) of the graphene filter (4) is connected to the intermediate water tank (3) for receiving filtered wastewater, the first outlet (403) of the graphene filter (4) is connected to the oil collection tank (6) for discharging oil phase, the second outlet (404) of the graphene filter (4) is connected to the water inlet of the clean water tank (8) for discharging clean water, and the second outlet (404) of the graphene filter (4) is connected to the water outlet of the clean water tank (8) for backwashing.

2. The graphene-based high-efficiency oil-water separation device according to claim 1, characterized in that: The graphene filter (4) is internally provided with a graphene filter membrane, which is stacked by multiple layers of graphene.

3. The graphene-based high-efficiency oil-water separation device according to claim 1, characterized in that: The pump set includes a raw water pump (2), a filter lifting pump (5), an oil transfer pump (7), a backwashing water pump (9), a recycled water pump (10), and a sludge pump (16). The raw water pump (2) is connected to the raw water tank (1) and the water inlet of the mud scraper (12). The filter lifting pump (5) is connected to the intermediate water tank (3) and the first inlet (401) of the graphene filter (4). The oil transfer pump (7) is connected to the oil collection tank (6). The backwashing water pump (9) is connected to the water outlet of the clean water tank (8) and the second outlet (404) of the graphene filter (4). The recycled water pump (10) is connected to the drain of the clean water tank (8). The sludge pump (16) is connected to the sludge outlet of the sludge tank (15) and the desludging machine (18).

4. The graphene-based high-efficiency oil-water separation device according to claim 1, characterized in that: The inlet of the mud scraper (12) is also provided with a container tank (19), the inlet of which is connected to the gas storage tank (11) and the nano microbubble generator dissolved air water pump (13). The inlet of the nano microbubble generator dissolved air water pump (13) is connected to the outlet of the mud scraper (12).

5. The graphene-based high-efficiency oil-water separation device according to claim 1, characterized in that: The outlet of the mud scraper (12) is also connected to the nano microbubble generator sludge discharge pump (14), and the outlet of the nano microbubble generator sludge discharge pump (14) is connected to the sludge tank (15).

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