CN219907325U - Oil-water separation equipment - Google Patents

Abstract

The utility model relates to the technical field of sewage treatment, in particular to oil-water separation equipment. The oil-water separation equipment comprises a gravity separation tank, a coalescence separator and a cyclone separator; the coalescing separator is connected to the top of the gravity separation tank through an oil drain pipe, and the oil drain pipe is provided with an oil pump capable of pumping fluid in the gravity separation tank to the coalescing separator; the cyclone separator is connected to the tank bottom of the gravity separation tank through a drain pipe, and the drain pipe is provided with a water pump capable of pumping fluid in the gravity separation tank to the cyclone separator. The utility model provides oil-water separation equipment for solving the technical problem of low oil-water separation precision in the prior art.

Description

Oil-water separation equipment

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to oil-water separation equipment.

Background

Residential areas, restaurants, hotels or canteens often produce large amounts of oily wastewater which, if not timely and effectively treated in a sewage tank, can bring a number of hazards: on one hand, environmental pollution is easy to cause, on the other hand, illegal oil vending machines are easy to enter when the illegal cooking oil vending machines are on the other hand, hidden danger that illegal cooking oil flows back to a dining table is provided, and meanwhile, because waste grease is not recycled again, huge energy waste is caused, and therefore, the separation treatment of oil and water in waste water is particularly important.

The water content in the oil collected by the traditional oil-water separation means is higher, and the oil content in the discharged water is higher, so that the oil-water separation precision is lower, and the recycling rate of the oily wastewater is low.

Accordingly, the present utility model provides a novel oil-water separation device against the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide oil-water separation equipment so as to solve the technical problem of low oil-water separation precision in the prior art.

Based on the above object, the present utility model provides an oil-water separation device comprising a gravity separation tank, a coalescing separator and a cyclone separator;

the coalescence-separation device is connected to the top of the gravity separation tank through an oil drain pipe, and the oil drain pipe is provided with an oil pump capable of pumping fluid in the gravity separation tank to the coalescence-separation device;

the cyclone separator is connected to the tank bottom of the gravity separation tank through a drain pipe, and the drain pipe is provided with a water pump capable of pumping fluid in the gravity separation tank to the cyclone separator.

Further, the oil-water separation equipment also comprises a floating oil absorber which is arranged in the sewage tank and used for collecting floating oil in the sewage tank;

the oil slick absorber is connected to the gravity separation tank through an oil inlet pipe, and the oil inlet pipe is provided with a liquid pump which can pump fluid in the oil slick absorber to the gravity separation tank.

Further, the gravity separation tank is provided with an oil inlet, and the oil inlet pipe is connected with the gravity separation tank through the oil inlet;

a buffer plate is arranged in the gravity separation tank and is arranged below the oil inlet; and/or a rectifying grid is arranged in the gravity separation tank, and fluid entering the gravity separation tank from the oil inlet can flow through the rectifying grid and then enter the oil discharge pipe and the water discharge pipe.

Further, a filter is arranged on the oil inlet pipe.

Further, the top of the gravity separation tank is connected to the sewage tank through an overflow pipe.

Further, an oil outlet of the oil pump is connected to the gravity separation tank through a first return pipe; and/or the water outlet of the water pump is connected to the overflow pipe through a second return pipe.

Further, the size of the overflow section of the first return pipe is 1/8-1/2 of the size of the overflow section of the oil drain pipe; the size of the overflow section of the second return pipe is 1/8-1/2 of the size of the overflow section of the drain pipe.

Further, the first oil outlet of the coalescing separator is provided with an oil outlet pipe, the oil outlet pipe is provided with an oil outlet valve, and the first water outlet of the coalescing separator is connected with the overflow pipe through a separation water pipe;

the second water outlet of the cyclone separator is provided with a water outlet pipe, the water outlet pipe is provided with a water outlet valve, and the second oil outlet of the cyclone separator is connected with the gravity separation tank through a separation oil pipe.

Further, the oil-water separation equipment also comprises a controller;

the gravity separation tank is internally provided with a liquid level meter for monitoring the liquid level of an oil layer, the gravity separation tank is internally provided with an oil-water analyzer for monitoring the water content of a water layer, and the liquid level meter, the oil pump, the oil-water analyzer and the water pump are all connected with the controller.

Further, the oil drain pipe is provided with a first regulating valve and a first electromagnetic valve, the drain pipe is provided with a second regulating valve and a second electromagnetic valve, and the first electromagnetic valve and the second electromagnetic valve are connected with the controller.

By adopting the technical scheme, the oil-water separation equipment has the following beneficial effects:

in the oil-water separation equipment, a coalescing separator is in the prior art and is used for removing water in an oil-water mixture and collecting anhydrous oil. The cyclone separator is the prior art and is used for removing oil in the oil-water mixture and collecting oil-free water. The gravity separation tank is internally used for storing oily wastewater or floating oil preliminarily collected in the oily wastewater, and oil and water are mutually insoluble liquid, and the oil can float on the water surface due to smaller density, so that the liquid in the gravity separation tank can be layered, the upper liquid close to the tank top is oil, and the lower liquid close to the tank bottom is water, thereby realizing the first-stage separation of oil and water.

In such a setting, because the coalescing separator is connected to the top of the gravity separation tank through the oil drain pipe, the oil pump is started, the oil pump can pump the upper layer of oil layer into the coalescing separator, and the water mixed in the oil is subjected to secondary separation through the coalescing separator, so that clean and anhydrous oil products are obtained for subsequent collection and recovery. Meanwhile, the cyclone separator is connected to the bottom of the gravity separation tank through the drain pipe, so that the water pump is started, the water pump can pump the water layer at the lower layer into the cyclone separator, oil components mixed in water are subjected to secondary separation through the cyclone separator, clean and oilless water is obtained, and the water can be directly discharged according to the discharge standard.

In summary, this oil-water separation equipment combines together gravity separation jar, coalescence separator and cyclone separator into integrated equipment, specifically, carry out first-stage separation to the sewage of profit mixture through gravity separation jar, obtain preliminary oil and water liquid, the rethread coalescence separator carries out the second-stage separation to oil, but obtain direct recycle's pure fluid, carry out the second-stage separation to water liquid through the cyclone separator simultaneously, but obtain direct discharge's pure water liquid, thereby make the water content in the oil that is collected through this oil-water separation equipment lower and the oil content in the water of discharge lower, the technical problem that the precision of oil-water separation that exists in the prior art is lower has been alleviated.

In addition, the oil-water separation equipment utilizes a gravity separation tank, a coalescence separator and a cyclone separator, realizes high-efficiency oil collection and high-precision oil-water separation by combining a gravity separation principle, a coalescence separation technology and a cyclone separation technology, completely depends on a physical separation method, does not add any chemical agent, therefore, has no influence on water quality and oil products, and can recycle the recovered oil and water, thereby improving the secondary utilization rate of separated oil and separated water.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an oil-water separation device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a coalescing separator of an oil-water separation device according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a cyclone separator of an oil-water separation device according to an embodiment of the present utility model.

Reference numerals:

1-a gravity separation tank; 2-coalescing separator; 21-coalescing filter element; 22-separating the filter element; 3-cyclone separator;

41-oil drain pipe; 42-draining pipe; 43-a blow-down pipe; 44-an oil inlet pipe; 45-overflow pipe; 46-a first return line; 47-a second return line; 481-an oil outlet pipe; 482-separate water pipes; 491-a water outlet pipe; 492-separating the tubing;

51-an oil pump; 52-a water pump; 53-liquid pump;

61-a blow-down valve; 62-an oil inlet valve; 63-an oil outlet valve; 64-water outlet valve; 65-a first regulating valve; 66-a second regulating valve;

71-a floating oil absorber; 72-a buffer plate; 73-rectifying grid; a 74-filter;

81-a liquid inlet electromagnetic valve; 82-a first solenoid valve; 83-a second solenoid valve;

91-a level gauge; 92-oil-water analyzer; 93-structure frame.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 1, the present embodiment provides an oil-water separation apparatus, which includes a gravity separation tank 1, a coalescing separator 2, and a cyclone separator 3; the coalescence-separator 2 is connected to the roof of the gravity separation tank 1 by an oil drain pipe 41, the oil drain pipe 41 being provided with an oil pump 51 capable of pumping the fluid in the gravity separation tank 1 to the coalescence-separator 2; the cyclone 3 is connected to the bottom of the gravity separation tank 1 by a drain pipe 42, the drain pipe 42 being provided with a water pump 52 capable of pumping fluid in the gravity separation tank 1 to the cyclone 3.

The coalescing separator 2 is a prior art device that is used to remove water from a mixture of oil and water and collect the resulting anhydrous oil. Referring to fig. 2, the coalescing separator 2 includes two types of filter elements, a coalescing filter element 21 and a separating filter element 22. After the oil flows into the coalescing separator 2, the oil firstly flows through the coalescing filter element 21, the coalescing filter element 21 filters out solid impurities, tiny water drops are coalesced into larger water drops, and most of the coalesced water drops can be separated and removed from the oil by self weight and are settled into a water collecting tank. The oil then flows through the separation cartridge 22, further separating the water due to the good oleophilic and hydrophobic properties of the separation cartridge 22, and finally the clean, anhydrous oil flows out of the coalescing separator 2.

In addition, the cyclone separator 3 is a prior art, and functions to remove oil in the oil-water mixture, and collect oil-free water. Referring to fig. 3, the cyclone separator 3 performs oil-water separation by utilizing a centrifugal sedimentation principle, wherein the main body comprises a cylindrical barrel and a conical barrel, oily water enters the cylindrical barrel along the tangential direction through an inlet pipe and moves downwards in a spiral shape, and water molecules with higher density are thrown to the wall under the action of inertial centrifugal force and then fall to an outlet at the bottom of the cone along with the downward cyclone, and are discharged from the bottom; the oil molecules with smaller density become ascending inner layer rotational flow and are discharged from the overflow port of the central tube at the top, and finally the oil-free water is obtained.

The oil-water separation device of this embodiment is used for storing oily wastewater or oil-water-containing wastewater in the gravity separation tank 1 and preliminarily collects floating oil, and because oil and water are mutually insoluble liquid, and the oil has small density and can float on the water surface, the liquid in the gravity separation tank 1 can be layered, and the upper liquid close to the tank top is oil, and the lower liquid close to the tank bottom is water, so that the first-stage separation of oil and water is realized.

In this arrangement, since the coalescing separator 2 is connected to the top of the gravity separator tank 1 via the oil drain pipe 41, the oil pump 51 is turned on, and the oil pump 51 is capable of pumping the upper layer of oil into the coalescing separator 2, and performing the second stage separation of the water mixed in the oil via the coalescing separator 2 to obtain a clean, anhydrous oil product for subsequent collection and recovery. Meanwhile, the cyclone separator 3 is connected to the bottom of the gravity separation tank 1 through the drain pipe 42, so that the water pump 52 is started, the water layer at the lower layer can be pumped into the cyclone separator 3 by the water pump 52, and oil components mixed in water are subjected to secondary separation through the cyclone separator 3, so that clean and oilless water is obtained, and the water can be directly discharged after reaching the discharge standard.

In summary, this oil-water separation equipment combines together gravity knockout drum 1, coalescence separator 2 and cyclone 3 three into integrated equipment, specifically, carry out first-stage separation to the sewage of profit mixture through gravity knockout drum 1, obtain preliminary separation's fluid and aqueous humor, rethread coalescence separator 2 carries out the second-stage separation to fluid, but obtain direct recycle's pure fluid, carry out the second-stage separation to aqueous humor through cyclone 3 simultaneously, but obtain direct discharge's pure water liquid, thereby make the lower and lower in the aquatic oil content of discharge of moisture in the oil that collects through this oil-water separation equipment, alleviate the lower technical problem of the oil-water separation's of the precision that exists among the prior art.

In addition, the oil-water separation equipment utilizes the gravity separation tank 1, the coalescence separator 2 and the cyclone separator 3, realizes high-efficiency oil receiving and high-precision oil-water separation by combining the gravity separation principle, the coalescence separation technology and the cyclone separation technology, completely depends on a physical separation method, does not add any chemical agent, has no influence on water quality and oil products, can recycle recovered oil and water, improves the secondary utilization rate of separated oil and separated water, has the advantages of stable and reliable performance, advanced technology, low power consumption, low water content of the recovered oil, low oil content of the separated water, clean working environment and the like, has obvious energy-saving benefit and environmental protection benefit, is a novel energy-saving, environment-friendly and high-efficiency oil receiving equipment, and can be widely applied to the treatment of various oily sewage containing engine oil, diesel oil, lubricating oil and vegetable oil in the industries such as metallurgy, oil refining, petrochemical industry and the like.

The water content of the oil separated by the oil-water separation equipment is low, the water content in the oil can be less than or equal to 2%, and the separated discharged water meets the first-level discharge requirement of GB8978-96 Integrated wastewater discharge Standard.

Preferably, referring to fig. 1, in the present embodiment, the oil-water separation apparatus further includes a drain provided at a tank bottom of the gravity separation tank 1, the drain being provided with a drain pipe 43, the drain pipe 43 being provided with a drain valve 61 for draining sewage to the gravity separation tank 1.

Preferably, referring to fig. 1, in the present embodiment, the oil-water separation apparatus further includes a floating oil absorber 71 disposed in the sewage tank for collecting floating oil in the sewage tank; the floating oil absorber 71 is connected to the gravity separation tank 1 through an oil inlet pipe 44, and the oil inlet pipe 44 is provided with a liquid pump 53 capable of pumping the fluid in the floating oil absorber 71 to the gravity separation tank 1.

It should be noted that, the oil slick absorber 71 is in the prior art, the oil slick absorber 71 is suitable for absorbing grease which floats on the water surface and has a density smaller than that of water, including engine oil, kerosene, diesel oil, lubricating oil and vegetable oil, and the like, and the oil slick absorber can gather and recover the grease no matter how thick the oil layer is on the water surface, so that the oil slick is efficiently collected, the oil slick is thoroughly collected, and the water surface is cleaner to be treated.

The oil-water separation device collects the floating oil in the sewage tank through the floating oil absorber 71 and pumps the floating oil to the gravity separation tank 1 through the liquid pump 53 so as to perform first-stage water-oil separation on the floating oil.

Preferably, referring to fig. 1, in the present embodiment, the oil inlet pipe 44 is provided with an oil inlet valve 62 for controlling on-off of the oil inlet pipe 44. The oil inlet pipe 44 is also provided with a liquid inlet electromagnetic valve 81, and the liquid inlet electromagnetic valve 81 is used for controlling the opening and closing of the water discharge of the oil inlet pipe 44, and the liquid inlet electromagnetic valve 81 is closed so as to be convenient for overhauling the liquid suction pump 53.

Referring to fig. 1, in the present embodiment, the gravity separation tank 1 is provided with an oil inlet, and an oil inlet pipe 44 is connected to the gravity separation tank 1 through the oil inlet.

Wherein, optionally, a buffer plate 72 is arranged in the gravity separation tank 1, and the buffer plate 72 is arranged below the oil inlet; or the gravity separation tank 1 is internally provided with a rectifying grating 73, and fluid entering the gravity separation tank 1 from the oil inlet can flow through the rectifying grating 73 and then enter the oil drain pipe 41 and the water drain pipe 42.

Preferably, a buffer plate 72 is arranged in the gravity separation tank 1, and the buffer plate 72 is arranged below the oil inlet; and a rectifying grating 73 is arranged in the gravity separation tank 1, and fluid entering the gravity separation tank 1 from an oil inlet can flow through the rectifying grating 73 and then enter the oil drain pipe 41 and the water drain pipe 42.

Wherein the buffer plate 72 reduces the speed of liquid entering the gravity separation tank 1 from the oil inlet when the liquid descends, so that the liquid can stably flow into the gravity separation tank 1. The rectification grating 73 is used for stabilizing the liquid state, and stabilizing the liquid in the flocculation state to the laminar state, thereby facilitating the rapid separation of oil and water.

Preferably, referring to fig. 1, in the present embodiment, the oil inlet pipe 44 is provided with a filter 74, and the filter 74 is used for removing larger particles in water, so that the floating oil entering the gravity separation tank 1 is the floating oil from which the larger particles are removed, and the service life of the device is prolonged.

Preferably, referring to fig. 1, in this embodiment, the roof of the gravity separation tank 1 is connected to the lagoon by an overflow pipe 45. This arrangement allows the oil to flow back to the sump through the overflow 45 when there is an excessive amount of oil in the gravity separator tank 1.

Optionally, the oil outlet of the oil pump 51 is connected to the gravity separator tank 1 via a first return pipe 46; or the water outlet of the water pump 52 is connected to the overflow pipe 45 via a second return pipe 47.

Preferably, the oil outlet of the oil pump 51 is connected to the gravity separator tank 1 through a first return pipe 46, so that the oil flowing back from the oil pump 51 can return to the gravity separator tank 1, and the water outlet of the water pump 52 is connected to the overflow pipe 45 through a second return pipe 47, so that the water flowing back from the water pump 52 can return to the sewage tank through the overflow pipe 45.

In such a setting, the first return pipe 46 plays a role in protecting the oil pump 51, and the first return pipe 46 is arranged to effectively return liquid in the oil pump 51, so that the pressure holding damage during the starting of the oil pump 51 is effectively prevented; the second return pipe 47 plays a role in protecting the water pump 52, and the second return pipe 47 is arranged to effectively return liquid in the water pump 52, so that the pressure building damage of the water pump 52 during starting is effectively prevented.

Preferably, the first return pipe 46 is connected to the side of the gravity separator tank 1 near the tank top, so that the oil returned by the oil pump 51 can be returned to the oil layer in the gravity separator tank 1.

Preferably, referring to FIG. 1, in the present embodiment, the size of the cross section of the first return pipe 46 is 1/8-1/2 of the size of the cross section of the oil drain pipe 41; the second return pipe 47 has an overflow cross-sectional dimension of 1/8-1/2 of the overflow cross-sectional dimension of the drain pipe 42.

Optionally, the size of the cross section of the first return pipe 46 is 1/8, 1/7, 1/6, 1/5, 1/4, 1/3 or 1/2 of the size of the cross section of the oil drain pipe 41, and the pipe diameter of the first return pipe 46 is specifically calculated and determined according to the minimum allowable flow of the oil pump 51; the cross-sectional size of the second return pipe 47 is 1/8, 1/7, 1/6, 1/5, 1/4, 1/3, or 1/2 of the cross-sectional size of the drain pipe 42, and the pipe diameter of the second return pipe 47 is specifically calculated and determined according to the minimum allowable flow rate of the water pump 52.

Preferably, referring to fig. 1, in the present embodiment, the first oil outlet of the coalescing separator 2 is provided with an oil outlet pipe 481, the oil outlet pipe 481 is provided with an oil outlet valve 63, and the first water outlet of the coalescing separator 2 is connected to the overflow pipe 45 through a separation water pipe 482; the second water outlet of the cyclone separator 3 is provided with a water outlet pipe 491, the water outlet pipe 491 is provided with a water outlet valve 64, and the second oil outlet of the cyclone separator 3 is connected with the gravity separation tank 1 through a separation oil pipe 492.

In this arrangement, the oil separated by the coalescing separator 2 is discharged through the first oil outlet and the oil outlet pipe 481 for recovery of the oil, and the separated water is returned to the overflow pipe 45 through the first water outlet and the separation water pipe 482, and returned to the sewage tank through the overflow pipe 45. The water separated by the cyclone separator 3 is discharged through the second water outlet and the water outlet pipe 491, and the separated oil returns to the gravity separation tank 1 through the second oil outlet and the separation oil pipe 492.

Preferably, referring to fig. 1, in this embodiment, the oil-water separation device further includes a controller; the gravity separation tank 1 is internally provided with a liquid level meter 91 for monitoring the liquid level of an oil layer, for example, a magnetic Z flap liquid level meter 91, the gravity separation tank 1 is internally provided with an oil-water analyzer 92 for monitoring the water content of a water layer, and the liquid level meter 91, the oil pump 51, the oil-water analyzer 92 and the water pump 52 are all connected with a controller.

When the liquid level of the oil layer monitored by the liquid level meter 91 reaches the preset highest liquid level, a signal is sent to the controller, the controller correspondingly controls the oil pump 51 to be started, oil in the gravity separation tank 1 is pumped into the coalescing separator 2, oil in the gravity separation tank 1 is reduced, the liquid level of the oil layer is reduced, and when the liquid level of the oil layer monitored by the liquid level meter 91 reaches the preset lowest liquid level, the controller correspondingly controls the oil pump 51 to be closed, and oil pumping is stopped. When the water content of the water layer monitored by the oil-water analyzer 92 reaches the highest water content, the controller correspondingly controls the water pump 52 to be started, and water in the gravity separation tank 1 is pumped into the cyclone separator 3, so that the water in the gravity separation tank 1 is reduced, the water level of the water layer is reduced, and when the water content of the water layer monitored by the oil-water analyzer 92 reaches the lowest water content, the controller correspondingly controls the water pump 52 to be closed, and pumping of the water is stopped.

Therefore, the degree of automation of the oil-water separation equipment is improved, the labor intensity of personnel is reduced, and the oil-water separation equipment is simple to operate, safe and reliable to use and convenient to maintain.

Preferably, referring to fig. 1, in the present embodiment, the oil drain pipe 41 is provided with a first regulating valve 65 and a first solenoid valve 82, the water drain pipe 42 is provided with a second regulating valve 66 and a second solenoid valve 83, and both the first solenoid valve 82 and the second solenoid valve 83 are connected to the controller.

The oil-water separator adjusts the discharge flow rate of the oil pump 51 by the first adjusting valve 65, and adjusts the discharge flow rate of the water pump 52 by the second adjusting valve 66.

In addition, when the liquid level of the oil layer monitored by the liquid level meter 91 reaches a preset highest liquid level, the controller correspondingly controls the oil pump 51 and the first electromagnetic valve 82 to be opened, so that the oil in the gravity separation tank 1 is pumped into the coalescing separator 2; when the liquid level of the oil layer monitored by the liquid level meter 91 reaches the preset minimum liquid level, the controller correspondingly controls the oil pump 51 and the first electromagnetic valve 82 to be closed, and oil pumping is stopped. When the water-oil analyzer 92 monitors that the water content of the water layer reaches the highest water content, the controller correspondingly controls the water pump 52 and the second electromagnetic valve 83 to be opened, and the water liquid in the gravity separation tank 1 is pumped into the cyclone separator 3; when the water content of the water layer reaches the minimum water content, the controller correspondingly controls the water pump 52 and the second electromagnetic valve 83 to be closed, and the pumping of the water is stopped. The first electromagnetic valve 82 is used for controlling the opening and closing of the oil discharge of the gravity separation tank 1, and the first electromagnetic valve 82 is closed so as to overhaul the oil pump 51; the second electromagnetic valve 83 is used for controlling the opening and closing of the drain of the gravity separation tank 1, and the water pump 52 is overhauled by closing the second electromagnetic valve 83.

Preferably, referring to fig. 1, the oil-water separation device further includes a structure frame 93, the gravity separation tank 1, the coalescing separator 2, the cyclone separator 3 and the controller are all arranged on the structure frame 93, the oil-water separation device realizes integration of suction, separation, oil transportation and water transportation, greatly increases the working efficiency, reduces the occupied area of the device, reduces the energy consumption of the system, and is a novel energy-saving, environment-friendly and efficient oil-water separation device.

The operation process of the oil-water separation equipment is as follows:

firstly, an oil inlet valve 62, a first regulating valve 65, an oil outlet valve 63, an water outlet valve 64 and a second regulating valve 66 are sequentially opened manually; when the equipment is started, the liquid suction pump 53 is started, the liquid inlet electromagnetic valve 81 is opened, under the action of the liquid suction pump 53, the floating oil in the sewage pool is sucked into the floating oil absorber 71 and enters the gravity separation tank 1 along the oil inlet pipe 44 through the filter 74, the floating oil is layered in the gravity separation tank 1, the oil is positioned at the upper layer, and the water level is positioned at the lower layer.

When the liquid level of the oil layer monitored by the liquid level meter 91 reaches the preset highest liquid level, a signal is sent to the controller, the controller correspondingly controls the oil pump 51 to start and the first electromagnetic valve 82 to be opened, oil enters the coalescence-separator 2 for separation through the oil discharge pipe 41, the separated oil is discharged into the recovery container through the oil outlet pipe 481, and the separated water is discharged back to the sewage tank through the overflow pipe 45. When the liquid level of the oil layer monitored by the liquid level meter 91 reaches the preset minimum liquid level, the controller correspondingly controls the oil pump 51 and the first electromagnetic valve 82 to be closed at the same time, and oil pumping is stopped.

When the water content of the water layer reaches the highest water content monitored by the oil-water analyzer 92, the controller correspondingly controls the water pump 52 and the second electromagnetic valve 83 to be opened, water enters the cyclone separator 3 through the water drain pipe 42 to be separated, the separated water is discharged through the water outlet pipe 491, and the separated oil is discharged back into the gravity separation tank 1 through the separation oil pipe 492. When the water content of the water layer reaches the minimum water content, the controller correspondingly controls the water pump 52 and the second electromagnetic valve 83 to be closed, and the pumping of the water is stopped.

After the oil-water separation equipment is operated, the drain valve 61 is opened, and the sewage in the gravity separation tank 1 is discharged through the drain pipe 43.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present utility model.

Claims (10)

1. The oil-water separation equipment is characterized by comprising a gravity separation tank (1), a coalescence separator (2) and a cyclone separator (3);

the coalescence-separation device (2) is connected to the top of the gravity separation tank (1) through an oil drain pipe (41), and the oil drain pipe (41) is provided with an oil pump (51) capable of pumping fluid in the gravity separation tank (1) to the coalescence-separation device (2);

the cyclone separator (3) is connected to the tank bottom of the gravity separation tank (1) through a drain pipe (42), and the drain pipe (42) is provided with a water pump (52) capable of pumping fluid in the gravity separation tank (1) to the cyclone separator (3).

2. The oil-water separation device according to claim 1, characterized in that the oil-water separation device further comprises a floating oil absorber (71) arranged in a sewage tank for collecting floating oil in the sewage tank;

the oil slick absorber (71) is connected to the gravity separation tank (1) through an oil inlet pipe (44), and the oil inlet pipe (44) is provided with a liquid pump (53) which can pump fluid in the oil slick absorber (71) to the gravity separation tank (1).

3. The oil-water separation device according to claim 2, characterized in that the gravity separation tank (1) is provided with an oil inlet through which the oil inlet pipe (44) is connected with the gravity separation tank (1);

a buffer plate (72) is arranged in the gravity separation tank (1), and the buffer plate (72) is arranged below the oil inlet; and/or, a rectifying grid (73) is arranged in the gravity separation tank (1), and fluid entering the gravity separation tank (1) from the oil inlet can flow through the rectifying grid (73) and then enter the oil discharge pipe (41) and the water discharge pipe (42).

4. The oil-water separation device according to claim 2, characterized in that a filter (74) is arranged on the oil inlet pipe (44).

5. An oil-water separation device according to claim 2, characterized in that the roof of the gravity separation tank (1) is connected to the sump by means of an overflow pipe (45).

6. -oil-water separation device according to claim 5, characterized in that the oil outlet of the oil pump (51) is connected to the gravity separator tank (1) by means of a first return pipe (46); and/or the water outlet of the water pump (52) is connected to the overflow pipe (45) through a second return pipe (47).

7. The oil-water separation device according to claim 6, characterized in that the cross-sectional size of the first return pipe (46) is 1/8-1/2 of the cross-sectional size of the oil drain pipe (41); the cross-sectional size of the second return pipe (47) is 1/8-1/2 of the cross-sectional size of the drain pipe (42).

8. The oil-water separation device according to claim 5, characterized in that the first oil outlet of the coalescing separator (2) is provided with an oil outlet pipe (481), the oil outlet pipe (481) is provided with an oil outlet valve, and the first water outlet of the coalescing separator (2) is connected to the overflow pipe (45) by a separating water pipe (482);

the second water outlet of the cyclone separator (3) is provided with a water outlet pipe (491), the water outlet pipe (491) is provided with a water outlet valve, and the second oil outlet of the cyclone separator (3) is connected with the gravity separation tank (1) through a separation oil pipe (492).

9. The oil-water separation device according to any one of claims 1 to 8, characterized in that the oil-water separation device further comprises a controller;

be provided with in gravity separation jar (1) be used for monitoring oil reservoir liquid level gauge (91), be provided with in gravity separation jar (1) and be used for monitoring water layer moisture content's profit analyzer (92), level gauge (91) oil pump (51), profit analyzer (92) and water pump (52) all with the controller is connected.

10. The oil-water separation device according to claim 9, wherein the oil drain pipe (41) is provided with a first regulating valve (65) and a first electromagnetic valve (82), the water drain pipe (42) is provided with a second regulating valve (66) and a second electromagnetic valve (83), and the first electromagnetic valve (82) and the second electromagnetic valve (83) are both connected with the controller.