Oil-water separation device for laboratory

Abstract

The utility model relates to the technical field of oil-water separation devices, in particular to an oil-water separation device for a laboratory, which comprises a separation box, a partition plate and a floating block, the partition plate divides an inner cavity of the separation box into an oily wastewater collection pool and a water injection pool, and the water injection pool is at least partially located at the bottom of the oily wastewater collection pool. The sewage inlet and the oil overflow port are both communicated to the oily wastewater collection pool, the oil overflow port is located at the top of the oily wastewater collection pool, the water inlet and the water outlet are both communicated to the water injection pool, a through hole is formed in the partition plate and located at the bottom of the oily wastewater collection pool, one part of the floating block is located in the oily wastewater collection pool, and the other part of the floating block is located in the water injection pool. The separation box is provided with a visual window. The through hole is blocked by the floating block, so that oily sewage can be naturally separated in the oily wastewater collecting tank, and after the floating block floats by injecting water into the water injection tank, the water level rises and oil is discharged through the oil overflow port, so that the size of the treatment device is reduced, the structure is simple, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil water separation device more particularly, relate to a laboratory oil water separation device. BACKGROUND

[0002] At present, most oil testing rooms will produce more oily wastewater when daily operating and cleaning the instruments such as test tubes after use, and if the oily wastewater is not effectively treated, it will bring environmental pollution, toxic and flammable and explosive hazards of oil and gas diffusion, and great safety hazards.

[0003] The prior art discloses a kind of oily wastewater gravity sedimentation oil removal groove, and the oil removal groove includes tank body and tank body in from left to right order buffer chamber, flow guide chamber, separation chamber, oil accumulation chamber and water accumulation chamber are arranged;Buffer baffle is arranged between buffer chamber and flow guide chamber;Flow guide baffle is arranged between flow guide chamber and separation chamber;Turbulent fence is arranged in separation chamber;Oil accumulation chamber includes oil accumulation front baffle, oil accumulation rear baffle and oil accumulation bottom plate;Wastewater overflow port, wastewater outlet, waste oil outlet and blow-off port are arranged on the rear end wall of tank body, and waste oil conduit is arranged on the oil accumulation rear baffle, which is communicated with oil accumulation chamber and waste oil outlet.In the absence of oil removal agent or oil removal medium, oil and water in oily wastewater are naturally separated under the action of gravity by utilizing the difference in oil-water density and the incompatible characteristics of oil and water.However, the device is large in size, complex in structure and high in cost. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiency of large size, complex structure and high cost of the device in the prior art, and provides a laboratory oil water separation device, which is small in size, simple in structure and low in cost.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] The utility model provides a laboratory oil water separation device, which comprises a separation box, a partition plate and a floating block, the partition plate is arranged in the separation box, the partition plate divides the inner cavity of the separation box into an oily wastewater collecting pool and a water injection pool, the water injection pool is at least partially located at the bottom of the oily wastewater collecting pool, the separation box is provided with a sewage inlet, an oil overflow port, a water inlet and an external water outlet, the sewage inlet and the oil overflow port are both communicated with the oily wastewater collecting pool, the oil overflow port is located at the top of the oily wastewater collecting pool, the water inlet and the external water outlet are both communicated with the water injection pool, the partition plate is provided with a through hole, the floating block blocks the through hole, the through hole is located at the bottom of the oily wastewater collecting pool, one part of the floating block is located in the oily wastewater collecting pool, and the other part of the floating block is located in the water injection pool, and the separation box is provided with a viewing window.

[0007] The utility model discloses a laboratory oil -water separation device, before carrying out oil -water separation, no liquid in the separation box, the floating block is blocked the through -hole, closes the oil overflow port, the water inlet and the external water outlet. The oily sewage is through the dirty inlet and is entered the oily wastewater collection pool, and the oily sewage is separated in the oily wastewater collection pool by the oil -water density difference, the incompatible characteristics, realizes the oil, water natural separation of oily wastewater under the gravity. After observing that the oil -water separation is completed through the visual window, opens the oil overflow port and the water inlet, and the water is injected into the water injection pool through the water inlet, and after the water submerges the floating block, the floating block floats in the oily wastewater collection pool, leaks the through -hole, and the water is entered the oily wastewater collection pool through the through -hole, and the water level in the oily wastewater collection pool rises, thereby the oil separated on the sewage is discharged through the oil overflow port. When observing that the oil is completely discharged through the visual window, closes the oil overflow port and the water inlet, and opens the external water outlet and discharges the sewage.

[0008] Further, the volume of the floating block in the water injection pool is greater than the volume in the oily wastewater collection pool. By making the volume in the oily wastewater collection pool smaller, the floating block is further ensured to block the through -hole during oil -water separation.

[0009] Further, the floating block is a floating ball, the through -hole is circular, and the diameter of the through -hole is less than the diameter of the floating ball. By making the floating block a floating ball, the friction between the floating block and the through -hole can be reduced, thereby facilitating the floating of the floating block.

[0010] Further, it further includes the oil overflow plate, the oil overflow plate is located in the separation box, the oil overflow plate divides the oily wastewater collection pool into the separation pool and the oil overflow pool, the dirty inlet is communicated to the separation pool, the oil overflow port is located at the top of the separation pool, and the oil overflow pool is communicated with the oil discharge port. By setting the oil overflow plate, the oil overflow pool is isolated, and the separated oil from the separation pool can be collected in the oil overflow pool first, and then discharged uniformly through the oil discharge port, thereby more convenient for separating oil and water.

[0011] Further, the partition plate comprises a horizontal plate and a vertical plate, the horizontal plate and the vertical plate are arranged in the separation tank, the horizontal plate is connected with the vertical plate, the water injection pool comprises a water inlet cavity and a communication cavity, the water inlet cavity and the communication cavity are communicated, the horizontal plate is located between the oil-containing wastewater collecting pool and the communication cavity, the vertical plate is located between the oil-containing wastewater collecting pool and the water inlet cavity, the through hole is arranged on the horizontal plate, and the other part of the floating block is located in the communication cavity. By arranging the partition plate as the horizontal plate and the vertical plate, the water flow enters the oil-containing wastewater collecting pool from the communication cavity through the through hole on the horizontal plate, and the water level in the oil-containing wastewater collecting pool can be known by observing the water level in the water inlet cavity, so that the oil can be better discharged from the oil discharge port.

[0012] Further, the separation tank is further provided with an inner drainage port communicated to the oil-containing wastewater collecting pool. By arranging the inner drainage port, the sewage in the oil-containing wastewater collecting pool can be completely discharged.

[0013] Further, the sewage inlet pipe comprises a straight pipe part and a bypass part, the straight pipe part is arranged on the separation tank and located at the sewage inlet, and the bypass part is connected with the straight pipe part and located in the oil-containing wastewater collecting pool. By arranging the bypass part, when the oil-containing sewage enters the sewage discharge pipe, the oil-containing sewage is preliminarily buffered through the bypass part, and the oil-water separation efficiency can be accelerated.

[0014] Further, the buffer inclined plate is arranged in the separation tank, and the buffer inclined plate is located in the oil-containing wastewater collecting pool and below the sewage inlet. By arranging the buffer inclined plate, the oil-containing sewage collides with the buffer inclined plate after entering the oil-containing wastewater collecting pool, and then the oil rises to the top liquid surface, so that the flow rate of the oil-containing sewage is reduced, and the oil-water separation efficiency can be accelerated.

[0015] Further, the buffer inclined plate gradually inclines downward from the inside of the separation tank to the outside of the separation tank. By inclining the buffer inclined plate towards the outside of the separation tank, the oil-containing sewage can be buffered after colliding with the inner wall of the separation tank, and the flow rate of the oil-containing sewage is further reduced.

[0016] Further, the buffer inclined plate comprises a first inclined plate and a second inclined plate, the first inclined plate and the second inclined plate are connected with the separation tank, the first inclined plate and the second inclined plate are oppositely arranged, and the projection parts of the first inclined plate and the second inclined plate from top to bottom are overlapped. By partially overlapping the first inclined plate and the second inclined plate, the oil-containing sewage entering the oil-containing wastewater collecting pool can be buffered by the buffer inclined plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The oil-water separation device for laboratory of the utility model, through the floating block plugging through -hole, let oily sewage can separate naturally in oily wastewater collection pool, and through to the water injection tank injects water and lets the floating block float, makes water level rise and discharges oil through oil overflow port, reduces the processing device volume, simple structure, thereby reduces the cost.

[0019] 2. The oil-water separation device for laboratory of the utility model, through setting up overflow board isolation overflow pool, the oil separated from the separation tank can be collected in the overflow pool first, then unified discharge through the oil discharge port, thereby more convenient for separating oil and water.

[0020] 3. The oil-water separation device for laboratory of the utility model, through setting up detour part, when oily sewage enters the sewage pipe, through the detour part preliminary buffering to oily sewage, can accelerate oil-water separation efficiency;And through the setting up buffer inclined plate, oily sewage enters oily wastewater collection pool and collides to the buffer inclined plate and slows down and buffers, then oil rises to the top liquid surface, thereby reducing the flow rate of oily sewage, can accelerate oil-water separation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structural schematic diagram of the oil-water separation device for laboratory;

[0022] Figure 2 It is the first view internal structure schematic diagram of the oil-water separation device for laboratory;

[0023] Figure 3 It is the second view internal structure schematic diagram of the oil-water separation device for laboratory.

[0024] In the drawing: 100, separation box;110, oily wastewater collection pool;111, separation tank;111a, sewage inlet;111b, oil overflow port;111c, inner drain port;112, overflow pool;112a, oil discharge port;120, water injection tank;121, water inlet cavity;121a, water inlet;122, communication cavity;122a, outer drain port;130, visible window;200, baffle;210, horizontal plate;211, through -hole;220, vertical plate;300, floating block;400, overflow board;500, sewage pipe;510, straight pipe part;520, detour part;600, buffer inclined plate;610, first inclined plate;620, second inclined plate. DETAILED DESCRIPTION

[0025] The utility model makes further explanation in combination with specific implementation. Among them, the drawing is only for example explanation, and the representation is only schematic diagram, and can not be understood as the limitation to this patent; in order to better illustrate the embodiment of the utility model, some components of the drawing can be omitted, enlarged or reduced, and it does not represent the size of actual product; for those skilled in the art, it is understandable that some well-known structures in the drawing and its description can be omitted.

[0026] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if there are terms "upper", "lower", "left", "right" and the like indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore the positional relationship of the term described in the drawing is only for example explanation, and can not be understood as the limitation to this patent, for the ordinary skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific situation.

[0027] Embodiment one

[0028] The embodiment is a first embodiment of the oil-water separation device for laboratory, as shown in Figure 1 And Figure 2 Shown, including separation tank 100, baffle 200 and floating block 300, baffle 200 is arranged in separation tank 100, baffle 200 separates the inner chamber of separation tank 100 into oil-containing wastewater collection pool 110 and water injection pool 120, water injection pool 120 is at least partially located at the bottom of oil-containing wastewater collection pool 110, separation tank 100 has pollution inlet 111a, overflow oil port 111b, water inlet 121a and external drainage port 122a, pipe fittings are installed at pollution inlet 111a, water inlet 121a and external drainage port 122a, and valve doors are installed on the pipe fittings, pollution inlet 111a and overflow oil port 111b are communicated to oil-containing wastewater collection pool 110, and overflow oil port 111b is located at the top of oil-containing wastewater collection pool 110, pollution inlet 111a is arranged at the top of separation tank 100 in the embodiment, water inlet 121a and external drainage port 122a are communicated to water injection pool 120, and water inlet 121a is arranged at the top of separation tank 100 in the embodiment, external drainage port 122a is arranged at the bottom of separation tank 100, baffle 200 has through hole 211, floating block 300 blocks through hole 211, through hole 211 is located at the bottom of oil-containing wastewater collection pool 110, a part of floating block 300 is located in oil-containing wastewater collection pool 110, and the buoyancy F1 of the part is equal to ρ1gV1, F1 < G, another part of floating block 300 is located in water injection pool 120, and the buoyancy F2 of the other part is equal to ρ2gV2, V 漂浮块When there is water in the oil-containing wastewater collecting pool 110 and the water injection pool 120, the buoyancy F of the floating block 300 is F1+F2, and the buoyancy of the floating block 300 is greater than the gravity, that is, F>G, so that the floating block 300 can float in the oil-containing wastewater collecting pool 110 and leak out of the through hole 211. When only the oil-containing wastewater collecting pool 110 contains water, the floating block 300 is only partially located in the water, and the buoyancy F1 is less than the gravity G, so that the through hole 211 can be blocked.

[0029] The separation tank 100 has a visible window 130, which can be provided with a plurality of visible windows located at the positions required to be observed.

[0030] The separation tank 100 also has an inner drain 111c, which is connected to the oil-containing wastewater collecting pool 110, as shown in the figure, the inner drain 111c is located at the bottom of the oil-containing wastewater collecting pool 110. By providing the inner drain 111c, the sewage in the oil-containing wastewater collecting pool 110 can be completely discharged. Figure 3

[0031] It also includes an oil overflow plate 400, which is arranged in the separation tank 100, and the oil overflow plate 400 separates the oil-containing wastewater collecting pool 110 into a separation pool 111 and an oil overflow pool 112, the sewage inlet 111a is connected to the separation pool 111, the oil overflow port 111b is located at the top of the separation pool 111, the oil overflow pool 112 is connected with an oil discharge port 112a, and the oil discharge port 112a is connected with a pipeline and a valve. By providing the oil overflow plate 400 to isolate the oil overflow pool 112, the oil separated from the separation pool 111 can be first collected in the oil overflow pool 112, and then discharged uniformly through the oil discharge port 112a, so that the separation of oil and water is more convenient.

[0032] It also includes a sewage inlet pipe 500, which includes a straight pipe part 510 and a detour part 520, the straight pipe part 510 is arranged on the separation tank 100 and located at the sewage inlet 111a, and the detour part 520 is connected with the straight pipe part 510 and located in the oil-containing wastewater collecting pool 110, as shown in the figures, the detour part 520 preferably detours 180°, that is, the water outlet of the detour part 520 faces upward. By providing the detour part 520, when the oil-containing sewage enters the sewage pipe 500, the oil-containing sewage is preliminarily buffered by the detour part 520, which can accelerate the oil-water separation efficiency. Figure 2 Figure 3

[0033] It also includes a buffer inclined plate 600, which is arranged in the separation tank 100, and the buffer inclined plate 600 is located in the oil-containing wastewater collecting pool 110 and below the sewage inlet 111a. By providing the buffer inclined plate 600, the oil-containing sewage collides with the buffer inclined plate 600 after entering the oil-containing wastewater collecting pool 110, which slows down and buffers, and then the oil rises to the top liquid surface, thereby reducing the flow rate of the oil-containing sewage, which can accelerate the oil-water separation efficiency.​​​

[0034] The working principle of the oil-water separation device for laboratory in this embodiment is as follows:

[0035] Before oil-water separation, the separation tank 100 is empty of liquid, the floating block 300 blocks the through hole 211, and the oil outlet 112a, the water inlet 121a, the inner drain 111c and the outer drain 122a are closed. The oil-containing sewage is introduced into the oil-containing sewage collection tank 110 through the sewage inlet pipe 500 at the sewage inlet 111a, and the oil-containing sewage is first buffered in the detour part 520, and then collides with the buffer inclined plate 600 for buffering to reduce the flow rate. The oil-containing sewage is naturally separated into oil and water in the oil-containing sewage collection tank 110 under the action of gravity by taking advantage of the density difference and the mutual incompatibility of oil and water. After observing that the oil-water separation is completed through the visual window 130, the water inlet 121a is opened, and water is injected into the water injection tank 120 through the water inlet 121a. After the water submerges the floating block 300, the floating block 300 floats in the oil-containing sewage collection tank 110 and leaks out of the through hole 211, and the water enters the oil-containing sewage collection tank 110 through the through hole 211, so that the water level in the oil-containing sewage collection tank 110 rises, thereby allowing the oil separated on the sewage to enter the oil overflow tank 112 through the oil overflow port 111b between the oil overflow plate 400 and the top of the separation tank 100 and be collected. When it is observed through the visual window 130 that the oil has completely entered the oil overflow tank 112, the oil outlet 112a is opened to discharge the collected oil, and the outer drain 122a is opened to discharge the sewage. The device blocks the through hole 211 by the floating block 300, so that the oil-containing sewage can be naturally separated in the oil-containing sewage collection tank 110, and the water level rises after the floating block 300 is floated by injecting water into the water injection tank 120, so that the oil is discharged through the oil outlet 112a, thereby reducing the size of the treatment device, simplifying the structure and reducing the cost.

[0036] Embodiment two

[0037] This embodiment is the second embodiment of the oil-water separation device for laboratory, which is similar to embodiment one, except that, as shown in Figure 3 the floating block 300 is provided as a floating ball, the through hole 211 is provided as a circle, and the diameter of the through hole 211 is smaller than the diameter of the floating ball. By providing the floating block 300 as a floating ball, the surface contact with the through hole 211 is changed to line contact, which can reduce the friction between the floating block 300 and the through hole 211, thereby facilitating the floating of the floating block 300. At the same time, the floating block 300 can be connected to the buffer inclined plate 600 through a connecting rope, so as to avoid the floating ball from falling into the through hole 211 again after floating, thereby facilitating the use next time.

[0038] The volume of the floating block 300 in the water injection pool 120 is greater than the volume in the oily wastewater collection pool 110. By making the volume in the oily wastewater collection pool 110 smaller, it further ensures that the floating block 300 blocks the through hole 211 when separating oil and water.

[0039] Embodiment three

[0040] This embodiment is a third embodiment of the oil-water separation device for laboratory. This embodiment is similar to the first embodiment, except that, as shown in Figure 2 and Figure 3 The partition 200 includes a horizontal plate 210 and a vertical plate 220, both of which are arranged in the separation tank 100. The horizontal plate 210 is connected to the vertical plate 220. The water injection pool 120 includes a water inlet cavity 121 and a communication cavity 122, which are in communication. The horizontal plate 210 is located between the oily wastewater collection pool 110 and the communication cavity 122, and the vertical plate 220 is located between the oily wastewater collection pool 110 and the water inlet cavity 121. The through hole 211 is arranged on the horizontal plate 210, and the other part of the floating block 300 is located in the communication cavity 122.

[0041] By arranging the partition 200 as a horizontal plate 210 and a vertical plate 220, the water flow enters the oily wastewater collection pool 110 from the communication cavity 122 through the through hole 211 on the horizontal plate 210. By observing the water level in the water inlet cavity 121, the water level in the oily wastewater collection pool 110 can be understood, and the oil can be better discharged from the oil discharge port 112a.

[0042] The horizontal plate 210 can be preferably arranged as a circular truncated cone structure with the upper part larger and the lower part smaller in this embodiment. The through hole 211 is located at the lowest end of the horizontal plate 210. After the sewage in the oily wastewater collection pool 110 is discharged, the floating block 300 automatically falls into the through hole 211, thereby facilitating the next use.

[0043] Embodiment four

[0044] This embodiment is a fourth embodiment of the oil-water separation device for laboratory. This embodiment is similar to the first embodiment, except that, as shown in Figure 2 and Figure 3 The buffer inclined plate 600 gradually inclines downward from the inside of the separation tank 100 to the outside of the separation tank 100. By inclining the buffer inclined plate 600 towards the outside of the separation tank 100, the oily sewage can be buffered after colliding with the inner wall of the separation tank 100, and the flow rate of the oily sewage is further reduced.

[0045] The buffer baffle 600 comprises a first baffle 610 and a second baffle 620, both of which are connected with the separation tank 100, the first baffle 610 and the second baffle 620 are oppositely arranged, and the projections of the first baffle 610 and the second baffle 620 from top to bottom are partially overlapped. By partially overlapping the first baffle 610 and the second baffle 620, the oily sewage entering the oily waste water collecting tank 110 can be buffered and slowed down by the buffer baffle 600.

[0046] As shown in the drawings, Figure 2 The buffer baffle 600 further comprises a third baffle and a fourth baffle, both of which are connected with the separation tank 100, the third baffle and the fourth baffle are oppositely arranged, the first baffle 610, the second baffle 620, the third baffle and the fourth baffle are sequentially arranged from top to bottom in the vertical direction, the first baffle 610 and the second baffle 620 are both provided with a flow gap between the partition plate 200 and the oil overflow plate 400, the third baffle is connected with the oil overflow plate 400, and the fourth baffle is connected with the partition plate 200. When the oily sewage enters, it first impacts on the first baffle 610 or the second baffle 620, and then impacts on the third baffle or the fourth baffle through the flow gap, and then flows to the bottom of the oily waste water collecting tank 110 after being accumulated on the third baffle or the fourth baffle, so that the oily sewage is buffered multiple times to reduce the flow rate of the oily sewage.

[0047] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in the present specification and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0048] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. Those skilled in the art can make other different forms of changes or variations on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A laboratory oil-water separation device, characterized by, The device comprises a separation box (100), a partition plate (200) and a floating block (300), the partition plate (200) is arranged in the separation box (100), the partition plate (200) divides the inner cavity of the separation box (100) into an oily wastewater collecting pool (110) and a water injection pool (120), the water injection pool (120) is at least partially located at the bottom of the oily wastewater collecting pool (110), the separation box (100) is provided with an oil inlet (111a), an oil overflow outlet (111b), a water inlet (121a) and a water outlet (122a), the oil inlet (111a) and the oil overflow outlet (111b) are both communicated with the oily wastewater collecting pool (110), the oil overflow outlet (111b) is located at the top of the oily wastewater collecting pool (110), the water inlet (121a) and the water outlet (122a) are both communicated with the water injection pool (120), the partition plate (200) is provided with a through hole (211), the through hole (211) is located at the bottom of the oily wastewater collecting pool (110), the floating block (300) blocks the through hole (211), one part of the floating block (300) is located in the oily wastewater collecting pool (110), the other part of the floating block (300) is located in the water injection pool (120), and the separation box (100) is provided with a visual window (130).

2. The laboratory oil-water separation device of claim 1, wherein, The volume of the floating block (300) located in the water injection pool (120) is greater than the volume of the floating block (300) located in the oily wastewater collecting pool (110).

3. The laboratory oil-water separator of claim 1, wherein, The floating block (300) is a floating ball, the through hole (211) is circular, and the diameter of the through hole (211) is smaller than the diameter of the floating ball.

4. The laboratory oil-water separator of claim 1, wherein, The device further comprises an oil overflow plate (400), the oil overflow plate (400) is arranged in the separation box (100), the oil overflow plate (400) divides the oily wastewater collecting pool (110) into a separation pool (111) and an oil overflow pool (112), the oil inlet (111a) is communicated with the separation pool (111), the oil overflow outlet (111b) is located at the top of the separation pool (111), and the oil overflow pool (112) is communicated with an oil outlet (112a).

5. The laboratory oil-water separator of claim 1, wherein, The partition plate (200) comprises a horizontal plate (210) and a vertical plate (220), the horizontal plate (210) and the vertical plate (220) are both arranged in the separation box (100), the horizontal plate (210) is connected with the vertical plate (220), the water injection pool (120) comprises a water inlet cavity (121) and a communication cavity (122), the water inlet cavity (121) and the communication cavity (122) are communicated, the horizontal plate (210) is located between the oily wastewater collecting pool (110) and the communication cavity (122), the vertical plate (220) is located between the oily wastewater collecting pool (110) and the water inlet cavity (121), the through hole (211) is arranged on the horizontal plate (210), and the other part of the floating block (300) is located in the communication cavity (122).

6. The laboratory oil-water separator of claim 1, wherein, The separation tank (100) further has an inner drainage port (111c) which communicates to the oily wastewater collecting pool (110).

7. The laboratory oil-water separation device according to any one of claims 1 to 6, characterized in that Further included is a sewage inlet pipe (500) which comprises a straight pipe portion (510) and a detour portion (520), the straight pipe portion (510) is arranged on the separation tank (100) and located at the sewage inlet port (111a), and the detour portion (520) is connected with the straight pipe portion (510) and located within the oily wastewater collecting pool (110).

8. The laboratory oil-water separation device according to any one of claims 1 to 6, characterized in that Further included is a buffer baffle (600) which is arranged within the separation tank (100), the buffer baffle (600) is located within the oily wastewater collecting pool (110) and below the sewage inlet port (111a).

9. The laboratory oil-water separation device of claim 8, wherein, The buffer baffle (600) gradually inclines downward from the inside of the separation tank (100) to the outside of the separation tank (100).

10. The laboratory oil-water separation device of claim 9, wherein, The buffer baffle (600) comprises a first baffle (610) and a second baffle (620), both of which are connected with the separation tank (100), the first baffle (610) and the second baffle (620) are oppositely arranged, and the projection of the first baffle (610) and the second baffle (620) from top to bottom overlaps.

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