Dirty oil recycling, filtering and conveying pry

Abstract

The invention discloses a sump oil recycling, filtering and conveying pry, which relates to the technical field of environmental protection equipment, and comprises an oil-water separation tank, a negative pressure generation device, a sump oil collector, an oil phase fine separation mechanism and a sewage pumping mechanism, the oil-water separation box is provided with a closed cavity, an oil separation plate and a liquid level control plate are arranged in the closed cavity, the upper end of the oil separation plate is higher than the upper end of the liquid level control plate, the lower end of the oil separation plate is provided with an overflowing gap, the lower end of the liquid level control plate is in closed connection with the cavity bottom and divides the cavity into a first bin, a second bin and a third bin, and spaces above the bins are communicated; a negative pressure suction port of the negative pressure generating device is communicated with the space above the closed cavity, the sump oil collector is communicated with the first bin through a flexible pipe and floats on the liquid level of the water collecting pool to collect water-containing sump oil, a sump oil suction port of the oil phase fine separation mechanism is located at the oil-water interface of the first bin, and an inlet of the sewage pumping-back mechanism is communicated with the third bin. And the discharge port is arranged in the water collecting tank. The sump oil in the water collecting tank can be cleaned and removed, and the environmental safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection equipment, in particular to a dirty oil recovery, filtration and conveying pry. BACKGROUND

[0002] The oil dirt or oily wastewater generated during the operation and maintenance of water pumps, oil pumps and other equipment of an oilfield joint station finally flows into a water collecting pool, and when oil leakage and other abnormalities occur in oil storage equipment such as an oil collecting tank, the oil dirt may flow into the water collecting pool, and the untreated wastewater in the water collecting pool is discharged through a drainage system, which may cause environmental pollution.

[0003] Therefore, it is very important to remove the dirty oil in the water collecting pool to ensure that the environment is not polluted. SUMMARY

[0004] The present application aims to provide a dirty oil recovery, filtration and conveying pry to solve the problems in the prior art and realize the cleaning and removal of the dirty oil in the water collecting pool to ensure environmental safety.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions. The present application provides a dirty oil recovery, filtration and conveying pry, comprising: an oil-water separation tank having a closed cavity, wherein an oil separation plate and a liquid level control plate are arranged in the closed cavity; the upper end of the oil separation plate is higher than the upper end of the liquid level control plate, the lower end of the oil separation plate has a flow gap with the bottom of the closed cavity, and the lower end of the liquid level control plate is in closed connection with the bottom of the closed cavity; the oil separation plate and the liquid level control plate sequentially divide the closed cavity into a first chamber, a second chamber and a third chamber, wherein the second chamber is located between the oil separation plate and the liquid level control plate; the upper end of the oil separation plate and the upper end of the liquid level control plate are both spaced from the inner top of the closed cavity, so that the spaces above the chambers are in communication with each other; a negative pressure generating device, a negative pressure suction port of which is in communication with the space above the closed cavity, for forming a negative pressure in the oil-water separation tank; a dirty oil collector in communication with the first chamber through a flexible pipe, for floating on the liquid surface of the water collecting pool to collect the water-containing dirty oil on the liquid surface; an oil phase fine separation mechanism, a dirty oil suction port of which is located at the oil-water interface of the first chamber, for performing oil-water separation treatment on the extracted substances; and a wastewater pump return mechanism, an inlet of which is in communication with the third chamber, and a discharge outlet of which is arranged in the water collecting pool.

[0006] Preferably, the oil collector comprises: an outer oil collecting weir having a first containing groove with an upward opening, a liquid discharge joint being fixedly arranged at the bottom of the first containing groove; a buoyancy supporting unit fixedly connected with the outer oil collecting weir and used for providing buoyancy to make the outer oil collecting weir float on the liquid surface; an inner oil collecting weir arranged in the first containing groove, the inner oil collecting weir having a second containing groove with an upward opening, the highest point of the second containing groove being lower than the highest point of the first containing groove, the second containing groove being communicated with the liquid discharge joint through a flexible connecting pipe; and a buoyancy balancing member fixedly arranged above the inner oil collecting weir and used for providing buoyancy to the inner oil collecting weir.

[0007] Preferably, a plurality of nozzles are fixedly arranged on the circumferential outer side wall of the outer oil collecting weir and face the outside of the outer oil collecting weir, each of the nozzles is communicated with an annular steam collecting pipe, a steam connecting pipe is fixedly arranged at the bottom of the outer oil collecting weir and communicated with the annular steam collecting pipe, and the steam connecting pipe is used for introducing water vapor.

[0008] Preferably, the buoyancy balancing member is a hollow ring, the hollow ring is located above the inner oil collecting weir, a spacing is formed between the hollow ring and the inner oil collecting weir, a plurality of supporting blocks are fixedly arranged in the inner oil collecting weir, and each of the supporting blocks is fixedly connected with the hollow ring.

[0009] Preferably, the buoyancy supporting unit comprises four main pontoons, and the outer oil collecting weir has a square structure, each of the main pontoons being located at a corner of the outer oil collecting weir.

[0010] Preferably, a bolt is fixedly arranged at the upper end of the main pontoon, and a plurality of counterweight nuts are threadedly connected with the bolt.

[0011] Preferably, a filter screen is fixedly arranged at the flow gap.

[0012] Preferably, the oil phase fine separation mechanism comprises a gear pump, a disc centrifuge, a water collecting tank and an oil storage tank, an inlet pipe of the gear pump extends into the oil-water separation tank and extends to the oil-water interface of the first bin, an outlet pipe of the gear pump is connected and communicated with an inlet of the disc centrifuge, a water outlet of the disc centrifuge is communicated with the water collecting tank, and an oil outlet of the disc centrifuge is communicated with the oil storage tank.

[0013] Preferably, the sewage pump back mechanism comprises a sewage backflow pump, a radar liquid level meter, a liquid discharge valve and a controller; the sewage backflow pump is in communication with the interior of the third bin, and the inlet of the sewage backflow pump is lower than the liquid level in the third bin; the radar liquid level meter is arranged in the third bin and is used for monitoring the liquid level in the third bin; a sewage discharge pipeline is arranged on the side wall of the first bin close to the filter screen, the end of the sewage discharge pipeline extends into a water collecting pool, and the liquid discharge valve is arranged on the sewage discharge pipeline; the controller is in communication connection with the sewage backflow pump, the radar liquid level meter and the liquid discharge valve.

[0014] Preferably, the negative pressure generating device is fixedly arranged on the oil-water separation tank; the oil-water separation tank, the oil phase fine separation mechanism and the sewage pump back mechanism are all fixedly integrated on a bottom pry.

[0015] The present application has the following technical effects relative to the prior art: The oil recovery filter delivery pry provided by the present application can float on the liquid surface of the water collecting pool through the oil collector, accurately collect the water-containing oil that flows into the water collecting pool from the equipment operation and maintenance and the abnormal leakage of the oil storage equipment, form negative pressure in the closed cavity of the oil-water separation tank by means of the negative pressure generating device, and suck the water-containing oil to the first bin through the flexible pipe; the water-containing oil is subjected to oil-water preliminary separation in the first bin, the oil floats up, the lower layer of sewage enters the second bin through the overflow gap at the lower end of the oil separation plate, and then flows into the third bin, and the cooperation of the oil separation plate and the liquid level control plate maintains the stability of the oil-water separation interface in the first bin; the oil phase fine separation mechanism extracts the separated oil phase through the oil extraction port at the oil-water separation interface of the first bin and performs fine oil-water separation treatment, and the sewage in the third bin is returned to the water collecting pool through the sewage pump back mechanism, so that the sewage in the water collecting pool is not directly discharged to cause environmental pollution, thereby realizing effective removal of the oil in the water collecting pool and protecting the environment from pollution. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The overall structure schematic diagram of the oil recovery filter delivery pry provided by the present application is shown in the figure. Figure 2 The structure schematic diagram of the oil collector in the oil recovery filter delivery pry provided by the present application is shown in the figure.

[0018] In the figure: 1-Oil-water separator; 101-Oil separator plate; 102-Level control plate; 103-Filter screen; 2-Oil sludge collector; 201-Main float; 202-External oil collection dike; 203-Drainage connector; 204-Hollow ring; 205-Internal oil collection dike; 206-Rubber bellows; 3-Gear pump; 4-Vacuum pump; 5-Disc centrifuge; 6-Oil storage tank; 7-Sewage return pump; 8-Sewage oil transfer pump; 9-Radar level gauge; 10-Flow meter; 11-Magnetic level gauge; 12-Water collection tank; 13-Steam connection pipe; 14-Steam manifold; 15-Nozzle; 16-Bolt; 17-Counterweight nut; 18-Support block; 19-Ear plate; 20-Crossbeam; 21-Hose; 22-Bottom skid. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a waste oil recovery, filtration and conveying skid to solve the problems existing in the prior art, realize the cleaning and removal of waste oil in the collection tank, and ensure environmental safety.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 This embodiment provides a waste oil recovery, filtration, and conveying skid, such as... Figures 1-2As shown, comprising: an oil-water separation tank 1, having a closed cavity, wherein an oil separation plate 101 and a liquid level control plate 102 are arranged; the upper end of the oil separation plate 101 is higher than the upper end of the liquid level control plate 102, the lower end of the oil separation plate 101 has a flow gap with the bottom of the closed cavity, and the lower end of the liquid level control plate 102 is closed connected with the bottom of the closed cavity; the oil separation plate 101 and the liquid level control plate 102 sequentially divide the closed cavity into a first chamber, a second chamber and a third chamber, wherein the second chamber is located between the oil separation plate 101 and the liquid level control plate 102; the upper end of the oil separation plate 101 and the upper end of the liquid level control plate 102 are both away from the inner top of the closed cavity, so that the spaces above the chambers are communicated with each other; a negative pressure generating device, the negative pressure suction port of which is communicated with the space above the closed cavity, is used for forming negative pressure in the oil-water separation tank 1; a dirty oil collector 2 is communicated with the first chamber through a flexible pipe (specifically a hose 21), and is used for collecting water-containing dirty oil on the liquid surface of the water collecting pool; an oil phase fine separation mechanism, the dirty oil suction port of which is located at the oil-water interface of the first chamber, is used for oil-water separation treatment of the extracted substances; a sewage pump return mechanism, the inlet of which is communicated with the third chamber, and the outlet of which is arranged in the water collecting pool.

[0023] The dirty oil collector 2 floats on the liquid surface of the water collecting pool, accurately collects water-containing dirty oil flowing into the water collecting pool from equipment operation and maintenance and abnormal leakage of oil storage equipment, forms negative pressure in the closed cavity of the oil-water separation tank 1 by the negative pressure generating device, and sucks the water-containing dirty oil to the first chamber through the flexible pipe; the water-containing dirty oil realizes oil-water preliminary stratification in the first chamber, the dirty oil floats up, the lower layer of sewage enters the second chamber through the flow gap at the lower end of the oil separation plate 101, and then flows into the third chamber, and the cooperation of the oil separation plate 101 and the liquid level control plate 102 maintains the stability of the oil-water interface in the first chamber; the oil phase fine separation mechanism extracts the separated oil phase through the dirty oil suction port located at the oil-water interface of the first chamber and performs fine oil-water separation treatment, and the sewage in the third chamber is returned to the water collecting pool through the sewage pump return mechanism, avoiding environmental pollution caused by untreated sewage discharge from the water collecting pool, so as to realize effective removal of dirty oil in the water collecting pool and protect the environment from pollution.

[0024] Among them, the related setting of the dirty oil collector 2 is explained as follows: In the optional scheme of the embodiment, it is more preferred that Figure 2As shown, the dirty oil collector 2 comprises: an outer oil collecting weir 202 having a first containing groove with an upward opening, a liquid discharge connector 203 fixedly arranged at the bottom of the first containing groove; a buoyancy supporting unit fixedly connected with the outer oil collecting weir 202 and used for providing buoyancy to make the outer oil collecting weir 202 float on the liquid surface; an inner oil collecting weir 205 arranged in the first containing groove, the inner oil collecting weir 205 having a second containing groove with an upward opening, the highest point of the second containing groove being lower than the highest point of the first containing groove, the second containing groove being communicated with the liquid discharge connector 203 (a connecting connector used for connecting with a hose 21) through a flexible connecting pipe (specifically, a rubber bellows 206); and a buoyancy balancing member fixedly arranged above the inner oil collecting weir 205 and used for providing buoyancy to the inner oil collecting weir 205.

[0025] Specifically, the rubber bellows 206 is coaxially arranged with the first containing groove and the second containing groove, and the liquid discharge connector 203 is fixedly welded on the outer oil collecting weir 202.

[0026] In the optional solution of the embodiment, preferably, as shown in the figure, Figure 2 As shown, a plurality of nozzles 15 are fixedly arranged on the circumferential outer side wall of the outer oil collecting weir 202 and face the outside of the outer oil collecting weir 202, each nozzle 15 is communicated with the annular steam collecting pipe 14, a steam connecting pipe 13 is fixedly arranged at the bottom of the outer oil collecting weir 202 and communicated with the annular steam collecting pipe 14, and the steam connecting pipe 13 is used for introducing water vapor. When the air temperature is low, the high-temperature water vapor is introduced to improve the activity of the dirty oil located on the circumferential outer side of the outer oil collecting weir 202, so that the dirty oil is better separated from the sewage.

[0027] In the optional solution of the embodiment, preferably, as shown in the figure, Figure 2 As shown, the buoyancy balancing member is a hollow ring 204, the hollow ring 204 is located above the inner oil collecting weir 205, there is a spacing between the hollow ring 204 and the inner oil collecting weir 205 (i.e. the hollow ring 204 does not directly contact the inner oil collecting weir 205), and a plurality of supporting blocks 18 are fixedly arranged in the inner oil collecting weir 205 and fixedly connected with the hollow ring 204.

[0028] In the optional solution of the embodiment, preferably, as shown in the figure, Figure 2 As shown, the buoyancy supporting unit is four main pontoons 201, the outer oil collecting weir 202 has a square structure (i.e. a square projection shape when viewed from above, and the four main pontoons 201 are located at the four corners of the square outer oil collecting weir 202), and each main pontoon 201 is located at each corner of the outer oil collecting weir 202.

[0029] Specifically, an ear plate 19 is fixedly arranged on the main pontoon 201, and the outer oil collecting weir 202 is fixedly connected with each ear plate 19. The four main pontoons 201 are fixedly connected with each other through a plurality of cross beams 20.

[0030] In an optional solution of the embodiment, preferably, as shown in Figure 2 As shown in the figure, the upper end of the main pontoon 201 is fixedly provided with a bolt 16 (welded and fixed on the main pontoon 201), and a plurality of counterweight nuts 17 are threadedly connected on the bolt 16. By increasing or decreasing the number of counterweight nuts 17, the overall center of gravity of the sludge oil collector 2 can be located at the geometric center, and the outer sludge oil cofferdam 202 can be in a horizontal state on the liquid surface, thereby maximizing the absorption of oil and minimizing the absorption of water.

[0031] Among them, the related setting of the oil-water separation tank 1 is as follows: Specifically, the oil-water separation tank 1 is a closed box; as shown in the figure, Figure 1 As shown in the figure, the lower part of the left side wall of the oil-water separation tank 1 is provided with a flexible pipe for connecting with the sludge oil collector 2.

[0032] Specifically, the top of the oil-water separation tank 1 can be a cover plate.

[0033] In an optional solution of the embodiment, preferably, as shown in Figure 1 As shown in the figure, a filter screen 103 is fixedly arranged at the flow gap. While recovering sludge oil, the filter screen 103 purifies the sewage in the water collecting pool.

[0034] Among them, the related setting of the negative pressure generating device is as follows: Specifically, the negative pressure generating device is a vacuum pump 4, which is fixedly arranged on the oil-water separation tank 1. The negative pressure generated by the vacuum pump 4 makes the suction range of the oil-water separation tank 1 greater than 5 meters.

[0035] Among them, the related setting of the sewage pump return mechanism is as follows: In an optional solution of the embodiment, preferably, as shown in Figure 1 As shown in the figure, the sewage pump return mechanism includes a sewage return pump 7, a radar liquid level meter 9, a drainage valve and a controller; the sewage return pump 7 is in communication with the inside of the third bin, and the inlet of the sewage return pump 7 is lower than the liquid level height in the third bin; the radar liquid level meter 9 is arranged in the third bin, for monitoring the liquid level height in the third bin; a sewage discharge pipeline is arranged on the side wall of the first bin close to the filter screen 103, and the end of the sewage discharge pipeline extends into the water collecting pool; the drainage valve is arranged on the sewage discharge pipeline; the controller is in communication connection with the sewage return pump 7, the radar liquid level meter 9 and the drainage valve (the radar liquid level meter 9 is used for linkage with the sewage return pump 7, and the radar liquid level meter 9 is used for realizing the start and stop of the sewage return pump 7 controlled by the controller).

[0036] Specifically, the setting of the drainage valve can periodically discharge the sundries (the sundries are intercepted on the side of the filter screen 103 close to the first bin) on the filter surface of the filter screen 103 back to the water collecting pool.

[0037] Among them, the related setting of the oil phase fine separation mechanism is as follows: In the optional solution of the embodiment, preferably, as shown in Figure 1 The oil phase fine separation mechanism includes a gear pump 3, a disc centrifuge 5, a water collecting tank 12 and an oil storage tank 6. The inlet pipe of the gear pump 3 extends into the oil-water separation tank 1 and reaches the oil-water interface of the first chamber. The outlet pipe of the gear pump 3 is connected with the inlet of the disc centrifuge 5 and communicates with the disc centrifuge 5. The water outlet of the disc centrifuge 5 communicates with the water collecting tank 12, and the oil outlet of the disc centrifuge 5 communicates with the oil storage tank 6.

[0038] Specifically, the gear pump 3 is fixedly arranged on the oil-water separation tank 1.

[0039] Specifically, a flow meter 10 is further arranged on the connecting pipeline between the outlet pipe of the gear pump 3 and the disc centrifuge 5.

[0040] Specifically, as shown in Figure 1 Due to the arrangement of the liquid level control plate 102, the sewage liquid level in the oil-water separation tank 1 is maintained at a certain height (i.e. the sewage liquid level in the first chamber and the second chamber is maintained at the height of the liquid level control plate 102). The sewage oil entering the oil-water separation tank 1 (specifically, when entering the first chamber) rises and forms a sewage oil layer on the left side of the oil separation plate 101. The gear pump 3 operates intermittently. The gear pump 3 sucks the sewage oil in the sewage oil layer. The inlet pipe of the gear pump 3 extends above the oil-water interface. When the sewage oil liquid level is separated from the inlet of the gear pump 3, the flow meter 10 detects that the flow is zero. The gear pump 3 is controlled to stop operating by the controller. According to the actual situation, after a period of time, when the sewage oil layer is thick enough, the gear pump 3 is started again by the controller.

[0041] Specifically, a magnetic reed liquid level meter 11 is installed on the oil storage tank 6. The controller controls the start and stop of the sewage oil export pump 8 according to the signal of the magnetic reed liquid level meter 11 (with signal output function).

[0042] Specifically, the bottom of the oil storage tank 6 is connected to the inlet of the sewage oil export pump 8 through a pipeline.

[0043] Among them, the other related settings are as follows: In the optional solution of the embodiment, preferably, as shown in Figure 1 The negative pressure generating device is fixedly arranged on the oil-water separation tank 1. The oil-water separation tank 1, the oil phase fine separation mechanism and the sewage pump return mechanism are integrally fixed on a bottom pry 22.

[0044] Specifically, the vacuum pump 4 is used to extract the air in the oil-water separation tank 1 to form a vacuum environment. The oil-water separation tank 1 sucks the sewage oil containing water sucked by the sewage oil collector 2. The sewage oil is separated by floating in the oil-water separation tank 1. The sewage oil is further separated and exported by the disc centrifuge 5. The sewage separated by the oil-water separation tank 1 is returned to the water collecting tank by the sewage return pump 7, so as to achieve the purpose of recycling the sewage oil in the water collecting tank and not polluting the environment.

[0045] Specifically, when the sewage collector collects oil on the liquid surface, due to external climate change, such as wind, the outer oil collection cofferdam 202 is caused to sway, and the lower sewage enters the outer oil collection cofferdam 202, at this time, under the action of the buoyancy of the hollow ring 204 and the flexible connection of the rubber corrugated pipe 206, the inner oil collection cofferdam 205 is not affected by the external waves and is still in a horizontal state, and the recovery rate of the oil is greatly improved.

[0046] Specifically, the oil-water separation tank 1, the oil storage tank 6, the sewage backflow pump 7, the oil external transport pump 8, the disc centrifuge 5 and the water collecting tank 12 are integrated on the bottom pry 22.

[0047] Specifically, the first bin is provided with a communication inlet on the side wall away from the oil separation plate 101, and the end of the flexible pipe is in communication with the communication inlet; a heater can be further arranged in the first bin close to the communication inlet, for improving the oil and dirt activity in the first bin, so as to improve the oil-water separation effect.

[0048] The principle and implementation mode of the present application are described by applying specific examples, and the above examples are only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In view of the above, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A slop oil recovery filter delivery pry characterized by: The oil-water separation tank comprises: An oil-water separation tank having a closed cavity, wherein an oil separation plate and a liquid level control plate are arranged in the closed cavity; the upper end of the oil separation plate is higher than the upper end of the liquid level control plate, the lower end of the oil separation plate has a flow gap with the bottom of the closed cavity, and the lower end of the liquid level control plate is in closed connection with the bottom of the closed cavity; the oil separation plate and the liquid level control plate sequentially divide the closed cavity into a first chamber, a second chamber and a third chamber, wherein the second chamber is located between the oil separation plate and the liquid level control plate; the upper end of the oil separation plate and the upper end of the liquid level control plate are both spaced from the inner top of the closed cavity, so that the spaces above the chambers are in communication with each other; A negative pressure generating device, a negative pressure suction port of which is in communication with the space above the closed cavity, for forming a negative pressure in the oil-water separation tank; A dirty oil collector in communication with the first chamber through a flexible pipe, for collecting water-containing dirty oil on the liquid surface of a water collecting pool; An oil phase fine separation mechanism, a dirty oil suction port of which is located at the oil-water interface of the first chamber, for performing oil-water separation treatment on the extracted substances; A dirty water pump return mechanism, an inlet of which is in communication with the third chamber, and a discharge outlet of which is arranged in the water collecting pool.

2. The slop oil recovery filter delivery pry of claim 1 wherein: The dirty oil collector comprises: An outer oil collecting cofferdam having a first containing groove with an opening facing upward, and a liquid discharge connector fixedly arranged at the inner bottom of the first containing groove; A buoyancy supporting unit fixedly connected with the outer oil collecting cofferdam, for providing buoyancy to make the outer oil collecting cofferdam float on the liquid surface; An inner oil collecting cofferdam arranged in the first containing groove, the inner oil collecting cofferdam having a second containing groove with an opening facing upward, the highest point of the second containing groove being lower than the highest point of the first containing groove, and the second containing groove being in communication with the liquid discharge connector through a flexible connecting pipe; A buoyancy balancing member fixedly arranged above the inner oil collecting cofferdam, for providing buoyancy to the inner oil collecting cofferdam.

3. The slop oil recovery filter delivery pry of claim 2 wherein: A plurality of nozzles are fixedly arranged on the circumferential outer side wall of the outer oil collecting cofferdam and face the outside of the outer oil collecting cofferdam, each of the nozzles is in communication with a ring-shaped steam collecting pipe, a steam connector is fixedly arranged at the bottom of the outer oil collecting cofferdam, and the steam connector is in communication with the ring-shaped steam collecting pipe; the steam connector is used for introducing water vapor.

4. The slop oil recovery filter delivery pry of claim 2 wherein: The buoyancy balancing member is a hollow ring, the hollow ring is located above the inner oil collecting cofferdam, and a spacing is provided between the hollow ring and the inner oil collecting cofferdam; a plurality of supporting blocks are fixedly arranged in the inner oil collecting cofferdam, and each of the supporting blocks is fixedly connected with the hollow ring.

5. The slop oil recovery filter delivery pry of claim 2 wherein: The buoyancy supporting unit is four main pontoons; the outer oil collecting cofferdam has a square structure, and each of the main pontoons is located at a corner of the outer oil collecting cofferdam.

6. The slop oil recovery filter delivery pry of claim 5 wherein: A bolt is fixedly arranged at the upper end of the main pontoon, and a plurality of counterweight nuts are threadedly connected with the bolt.

7. The slop oil recovery filter delivery pry of claim 1 wherein: A filter screen is fixedly arranged at the flow gap.

8. The slop oil recovery filter delivery pry of claim 7 wherein: The oil phase fine separation mechanism comprises a gear pump, a disc-type centrifuge, a water collecting tank and an oil storage tank. The inlet pipe of the gear pump extends into the oil-water separation tank to the oil-water interface of the first chamber; the outlet pipe of the gear pump is connected with and communicates with the inlet of the disc centrifuge; the water outlet of the disc centrifuge communicates with the water collecting tank, and the oil outlet of the disc centrifuge communicates with the oil storage tank.

9. The slop oil recovery filter delivery pry of claim 8 wherein: The sewage backflow mechanism comprises a sewage backflow pump, a radar liquid level meter, a liquid discharge valve and a controller. The sewage backflow pump communicates with the interior of the third chamber, and the inlet of the sewage backflow pump is lower than the liquid level in the third chamber; the radar liquid level meter is arranged in the third chamber and is used for monitoring the liquid level in the third chamber. A sewage discharge pipeline is arranged on the side wall of the first chamber close to the filter screen, the end of the sewage discharge pipeline extends into a water collecting pool, and the liquid discharge valve is arranged on the sewage discharge pipeline. The controller is in communication connection with the sewage backflow pump, the radar liquid level meter and the liquid discharge valve.

10. The slop oil recovery filter delivery pry of claim 1 wherein: The negative pressure generating device is fixedly arranged on the oil-water separation tank. The oil-water separation tank, the oil phase fine separation mechanism and the sewage backflow mechanism are integrally fixed on a bottom pry.

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