CN213012230U

CN213012230U - Intelligent catering oily water treatment equipment with early warning function

Info

Publication number: CN213012230U
Application number: CN201821838034.8U
Authority: CN
Inventors: 魏亮亮; 冯国亮
Original assignee: Zhejiang Beinuo Environment Technology Co ltd
Current assignee: Zhejiang Beinuo Environment Technology Co ltd
Priority date: 2018-11-08
Filing date: 2018-11-08
Publication date: 2021-04-20
Anticipated expiration: 2028-11-08

Abstract

The utility model relates to an intelligent catering oily water treatment device with early warning function, the main body of the device is a device box body, a buffer zone, an oil-water separation zone, a first deep treatment zone, a second deep treatment zone and a clear water zone are sequentially formed by separating a baffle from the front end to the rear end along the length direction in the device box body, a conical oil collecting cover is fixedly arranged in each treatment zone, an oil collecting tank cavity is arranged in the middle of each conical oil collecting cover, filter placing frames which are connected with the conical oil collecting cover into a whole are arranged in the first deep treatment zone and the second deep treatment zone, and a filter is arranged in the first deep treatment zone and the second deep treatment zone; the outer side surface of the equipment box body is provided with an oil collecting tank and an oil discharge pump, the bottom of the oil collecting tank is provided with an oil outlet pipe with a valve, and the initial oil collecting positions in the oil collecting groove cavities in the equipment box body are externally connected with the oil discharge pump through the oil discharge pipe and are pumped into the oil collecting tank. The processing method comprises the following steps: the oil-water separation is formed in each treatment area, oil is collected, and the oil discharge pump is controlled to discharge oil, so that the oil is fully collected and recovered, and the oil sewage treatment effect and efficiency are improved.

Description

Intelligent catering oily water treatment equipment with early warning function

Technical Field

The utility model relates to a food and beverage sewage treatment field is an intelligent food and beverage oily water treatment device of area early warning function.

Background

The sewage discharged every day in the catering industry mainly contains a large amount of organic matters, wherein the concentration of animal and vegetable oil is as high as 1000-8000 mg/L, the concentration of suspended particles is as high as 1500-8000 mg/L, and the concentration of COD is as high as 1200-25000 mg/L. If these untreated pollutants are left to drain with the sewage directly into the river or directly into the municipal sewage network, a series of environmental problems will arise. Therefore, before entering the sewage treatment system, the restaurant sewage is pretreated to remove solid residues and most of oil stains.

At present, the restaurant sewage is treated by unpowered sewage treatment equipment or a traditional oil separation tank. The traditional oil separation tank achieves automatic separation by utilizing the difference of specific gravity of grease and water. Unpowered sewage treatment device is the replacement product of traditional oil interceptor in the existing market, and this equipment generally is a box structure, is equipped with the case lid on this box, is equipped with the polylith baffle in the box and separates it and form multistage filter unit, and sewage gets into the incasement from the entry of box, through filter unit at different levels in proper order, will solidify the residue and deposit and discharge into public sewage system behind the most animal and vegetable oil fat of detaching. Although this type of equipment compares traditional oil interceptor effect better, because configuration optimization is not good enough, oil-water separation effect and filter effect still are not enough, especially collect oil recovery part, and current a great deal of food and beverage sewage treatment device can only realize local region collection oil recovery processing, leads to other regions of whole equipment still to need often to maintain the clearance, has improved use cost. Therefore, the structure of the existing catering sewage filter needs to be optimized and improved.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide an intelligent catering oily water treatment device with an early warning function to the field, so that the intelligent catering oily water treatment device solves the technical problems that the oily water treatment effect of the existing similar devices is not good enough and the collected oil is not sufficiently recovered. The purpose is realized by the following technical scheme.

An intelligent catering oily water treatment device with an early warning function is characterized in that the main body of the device is a cuboid-shaped device box body, a cache region, an oil-water separation region, a first advanced treatment region, a second advanced treatment region and a clear water region are sequentially formed in the device box body from the front end to the rear end along the length direction through partition plates, a water inlet is formed in the top of the cache region, a three-way drain pipe is arranged in the clear water region, an overflow pipe A is arranged in the cache region and is communicated with the oil-water separation region in an overflowing mode through the overflow pipe A; the device is characterized in that the oil-water separation zone is communicated with the first advanced treatment zone through a limber hole below the two partition plates, the first advanced treatment zone is communicated with the second advanced treatment zone through an overflow port A above the two partition plates in an overflow way, and the second advanced treatment zone is communicated with the clear water zone through an overflow port B above the two partition plates in an overflow way; the oil-water separation zone, the first deep treatment zone, the second deep treatment zone and the clear water zone are respectively and fixedly provided with a conical oil collecting cover at the position of each oil collecting liquid level, the middle part of each conical oil collecting cover is provided with an oil collecting groove cavity protruding for collecting oil, the first deep treatment zone and the second deep treatment zone are respectively provided with a filter placing frame connected with the conical oil collecting cover into a whole, a filter is placed in the filter placing frame, the water inlet end of the filter is positioned below the overflow liquid level of the corresponding treatment zone, and the water outlet end of the filter is communicated with the overflow port of the rear side partition plate of the corresponding treatment zone; overflow channels are formed between the conical oil collecting covers of the second deep treatment area and the clear water area and the partition plate in front of the second deep treatment area and the clear water area respectively, and the overflow channels are communicated with the oil collecting groove cavities of the corresponding conical oil collecting covers; an oil collecting tank and an oil discharge pump are arranged on one outer side surface of the equipment tank body, the bottom surface of the oil collecting tank is an inclined plane, and an oil outlet pipe with a valve is arranged at the bottom of the inclined plane; the initial oil collecting position in the oil collecting groove cavity of each conical oil collecting cover in the equipment box body is guided to the outside of the equipment box body through an oil discharging pipe and is communicated with an oil inlet pipe of an oil discharging pump, and a liquid outlet pipe of the oil discharging pump is communicated to the inside of the oil collecting box.

In the structure, the overflow pipe A, the water through port and the overflow port are arranged, so that an S-shaped flow passage is formed when sewage flows along the equipment box body, and the oil-water full separation is realized. And each treatment area is internally provided with a conical oil collecting cover which concentrates the floating oil into the oil collecting cavity and collects the floating oil into the oil collecting tank through an oil discharge pipe and an oil discharge pump, so that the floating oil after oil-water separation of each treatment area is fully collected, and the treatment efficiency of oily water is improved. Besides, all be equipped with the filter in first advanced treatment zone, the second advanced treatment zone, further filter oily water through the filter to improve oily water treatment effect, guarantee to finally discharge up to standard.

In the catering oily water treatment equipment, the top of an oil collecting groove cavity of each conical oil collecting cover in the equipment box body is connected with an overflow pipe B which is horizontally communicated to the top in the oil collecting box. Through setting up overflow pipe B, when certain treatment area appears blockking up and leads to the water level to rise in the equipment box, utilize overflow pipe B with oily water overflow to the sump oil tank in, overflow oily water to other treatment areas through other overflow pipes B by the sump oil tank again to reach and prevent that individual treatment area from appearing blockking up and oily water overflows the problem.

In the catering oily water treatment equipment, the oil collecting tank is internally provided with the liquid level sensor, and the liquid level sensor is externally connected with the alarm device. Through the structure, when the liquid level in the oil collecting tank exceeds a preset value, an alarm is given out so that an operator can maintain or discharge the floating oil in the oil collecting tank in time.

In the catering oily water treatment equipment, the bottom of the inner inclined plane of the oil collecting tank is connected with one end of a return pipe, a valve is arranged in the return pipe, the other end of the return pipe is communicated with the inside of the oil-water separation zone, the return pipe is obliquely arranged, and one end of the return pipe connected with the oil-water separation zone is low while the other end is high. Through the backflow pipe structure, sewage with high density at the bottom of floating oil in the oil collecting tank flows back to the oil-water separation region through the backflow pipe, so that high-concentration floating oil can be collected in the oil collecting tank, and subsequent recovery treatment is facilitated.

Among the above-mentioned food and beverage oily water treatment facilities, filter rack and equipment box inner wall and correspond the treatment area rear side baffle welded fastening, the filter rack is equipped with one row of filter and places the position in storehouse, and each filter is placed the position in storehouse and is corresponded and place a filter, and the filter top is equipped with the handle. The structure is relatively simple, the filter can be conveniently installed and taken out, and the use is convenient and fast.

In the catering oil sewage treatment equipment, the top of the cache region of the equipment box body is provided with an electric slag removal device, the electric slag removal device comprises a motor, a slag removal cylinder and a slag removal rod with a helical blade, the slag removal rod is rotationally positioned in the slag removal cylinder, one end of the slag removal rod extends out of the slag removal cylinder and is in transmission connection with the motor, the side face of one end of the slag removal cylinder is provided with a liquid inlet which is communicated with the water inlet of the cache region, one side face of the slag removal cylinder, back to the liquid inlet, is provided with a filtering slag removal hole for guiding oil sewage to the cache region, and the other end of the slag; the deslagging cylinder is obliquely arranged relative to the equipment box body, one end of the deslagging cylinder where the filtering slag hole is located is low, and the other end of the deslagging cylinder is high. Through this structure, utilize the helical blade on the slagging-off pole to rotate to promote filterable residue to row's sediment pipe, realize filtering and arrange sediment operation, it is comparatively convenient, reliable.

In the catering oily water treatment equipment, the oil discharge pipe of each treatment area in the equipment box body is provided with the electromagnetic valve which is independently controlled to be switched on and switched off. Through this structure, can carry out oil absorption alone to appointed disposal area and collect the operation according to actual need, it is more nimble convenient to operate.

In the catering oily water treatment equipment, the top of each treatment area in the equipment box body and the top of the oil collecting tank are respectively provided with a detachable movable cover plate, and the movable cover plates are provided with handles. Through the detachable movable cover plate, the movable cover plate is conveniently detached to clean or suck each area in the equipment box body.

In the catering oily water treatment equipment, the overflow pipe A is an L-shaped pipe, the pipe orifice at the upper end of the L-shaped pipe is positioned in the cache region, the pipe orifice at the lower end of the L-shaped pipe is communicated to the oil-water separation region, the height of the pipe orifice at the lower end of the L-shaped pipe is lower than that of the overflow port A and higher than that of the limber hole of the first advanced treatment region, and the pipe orifice at the lower end of the L-shaped pipe and the limber hole are distributed on two sides of the equipment. Through this structure, buffering rivers improve the oil-water separation effect as far as possible.

The utility model discloses a modular structure, the whole installation is used comparatively simple and conveniently, can realize that each treatment area fully collects oil and retrieve, has improved oily water treatment effect and efficiency, is fit for using as all kinds of food and beverage sewage treatment device, or the institutional advancement of equipment of the same kind.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the internal partial section structure of the present invention, in which a-a section is taken.

Fig. 3 is a schematic view of the internal structure of the top surface of the present invention, and a part of the removable cover plate is omitted.

Fig. 4 is a schematic sectional structure view a-a of fig. 2.

Fig. 5 is a schematic view of a partial structure of the side of the present invention.

Fig. 6 is a perspective view of the present invention.

The sequence numbers and names in the figure are: 1. the device comprises a device box body, 101, a buffer area, 102, an oil-water separation area, 103, a water through hole, 104, a first deep treatment area, 105, a second deep treatment area, 106, a clean water area, 107, an overflow port A, 108, an overflow port B, 109, an overflow channel, 2, an electric deslagging device, 201, a motor, 202, a deslagging cylinder, 203, a deslagging rod, 204, a helical blade, 205, a deslagging pipe, 3, a water inlet, 4, a three-way drainage pipe, 5, an oil collection tank, 6, an oil outlet pipe, 7, a return pipe, 8, an overflow pipe A, 9, a conical oil collection cover, 901, an oil collection tank cavity, 10, an oil discharge pipe, 11, an overflow pipe B, 12, a filter placing frame, 1201, a filter placing bin, 13, a filter, 14, an oil discharge pump, 15, an oil inlet pipe, 16, a liquid outlet pipe, 17 and an electromagnetic valve.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

As shown in figures 1-6, the main body of the intelligent catering oily water treatment equipment with the early warning function is a rectangular equipment box body 1, a cache region 101, an oil-water separation region 102, a first advanced treatment region 104, a second advanced treatment region 105 and a clear water region 106 are sequentially formed in the equipment box body from the front end to the rear end through partition plates along the length direction, an electric slag removal device 2 and a water inlet 3 are arranged at the top of the cache region, and a three-way drain pipe 4 is arranged in the clear water region. The electric slag removing device comprises a motor 201, a slag removing cylinder 202 and a slag removing rod 203 with a helical blade 204, wherein the slag removing rod is rotatably positioned in the slag removing cylinder, one end of the slag removing rod extends out of the slag removing cylinder to be connected with the motor in a transmission way, one side face of one end of the slag removing cylinder is provided with a liquid inlet communicated with a water inlet of a cache region, one side face of the slag removing cylinder, back to the liquid inlet, is provided with a filtering slag removing hole for guiding oily water to the cache region, the other end of the slag removing cylinder is connected with a slag discharging pipe 205 with a downward opening, and the. The deslagging cylinder is obliquely arranged relative to the equipment box body during installation, namely, one end of the deslagging filtering hole is low, and the other end of the deslagging filtering hole is high, so that sewage is prevented from flowing out of the deslagging pipe.

Two L-shaped overflow pipes A8 are arranged in the cache region, the pipe orifices at the upper ends of the overflow pipes A are positioned in the cache region 101 and used as overflow inlets, the lower ends of the overflow pipes A are bent and extend into the oil-water separation region 102, and the cache region is communicated with the oil-water separation region through the overflow pipes A in an overflow manner. The oil-water separation zone is communicated with the first advanced treatment zone 104 through the water through holes 103 below the partition plates of the oil-water separation zone and the first advanced treatment zone, the height position of each water through hole is lower than the height of the lower-end pipe orifice of the overflow pipe A, the position of the partition plate where the water through hole is located and the position of the partition plate where the overflow pipe A is located are close to two sides of the width direction of the equipment box body respectively, namely the water through holes are far away from the lower-end pipe orifice of the overflow pipe A as far as possible.

The first advanced treatment area 104 is communicated with the second advanced treatment area 105 through a plurality of overflow ports A107 above the two partition plates in an overflowing way, the second advanced treatment area is communicated with the clear water area through a plurality of overflow ports B108 above the two partition plates in an overflowing way, the overflow height of the overflow ports A and B is the same as the overflow drainage height of the three-way drainage pipe 4, and the overflow height of each overflow port is lower than the overflow height of the overflow pipe A8 and higher than the height of a pipe orifice at the lower end of the overflow pipe A. The oil-water separation zone 102, the first deep treatment zone, the second deep treatment zone and the clear water zone 106 are respectively welded and fixed with a conical oil collecting cover 9 at the liquid level of each oil collecting, and the middle part of each conical oil collecting cover is provided with an oil collecting groove cavity 901 which is protruded for collecting oil. All be equipped with in first degree of depth processing district, the second degree of depth processing district with toper collection oil cover welding integrative filter rack 12, the filter rack is frame construction, forms one row of cubic's filter placing compartment 1201 that corresponds with corresponding side baffle overflow mouth figure in the frame, filter placing compartment bottom welding has the bracing piece, the bracing piece forms the support to filter 13 in the filter placing compartment, filter rack and equipment box inner wall and correspond the processing area rear side baffle welded fastening. After the filter is placed in the filter placing bin, the water inlet end of the filter is positioned below the overflow liquid level of the corresponding processing area, and the water outlet end of the filter is correspondingly communicated with the overflow port of the partition plate welded on the corresponding filter placing frame. The filter adopts the existing biological filler filter or multi-layer mesh filter, etc.

Overflow channels 109 for overflowing the overflow ports A107 and B108 are formed between the conical oil collecting covers 9 of the second advanced treatment area 105 and the clear water area 106 and the partition plates in front of the conical oil collecting covers respectively, and the overflow channels are communicated with the oil collecting groove cavities 901 of the corresponding conical oil collecting covers. When the overflow channel is actually designed, the overflow quantity of the overflow port A and the overflow port B can be met, so that the influence on oil collection of the oil collecting groove cavity in the second deep treatment area and the clear water area is reduced.

An oil collecting tank 5 and an oil discharge pump 14 are arranged on one outer side face of the equipment tank body 1, the bottom surface of the oil collecting tank is an inclined plane, the bottom of the inclined plane is connected with an oil outlet pipe 6 with a valve and a return pipe 7 with the valve, the oil outlet pipe corresponds to the oil collecting barrel, the return pipe is communicated with the inside of the oil-water separation zone 102 and is obliquely arranged, and one end of the return pipe connected with the oil-water separation zone is low while the other end is. The initial oil collecting position in the oil collecting groove cavity 901 of each conical oil collecting cover 9 in the equipment box body is guided to the outside of the equipment box body through an oil discharge pipe 10 and is communicated with an oil inlet pipe 15 of an oil discharge pump, and a liquid outlet pipe 16 of the oil discharge pump is communicated into the oil collecting box. In order to facilitate the independent control of the oil discharge of each treatment area, an electromagnetic valve 17 which is independently controlled to be opened and closed is arranged in the oil discharge pipe in each treatment area. Furthermore, the top of the oil collecting groove cavity of each conical oil collecting cover in the equipment box body is connected with an overflow pipe B11 which is horizontally communicated to the top of the oil collecting box. The overflow pipe B balances the water level of each treatment area to prevent the overflow problem of blockage of a certain treatment area.

In order to further facilitate the use, a liquid level sensor is arranged in the oil collecting tank 5, and the liquid level sensor is externally connected with an alarm device. The top of each treatment area in the equipment box body and the top of the oil collecting box are respectively provided with a detachable movable cover plate, and the movable cover plates are provided with handles.

The catering sewage treatment equipment comprises the following treatment processes: restaurant sewage enters the electric deslagging device 2 from the water inlet 3, oily sewage after electric deslagging enters the buffer area 101, preliminary sedimentation and oil-water separation are carried out, and the oily sewage above the buffer area overflows into the oil-water separation area 102 through the overflow pipe A8. The oily water in the oil-water separation zone is subjected to oil collection through the conical oil collection cover 9, the floating oil is collected in the oil collection tank cavity 901, meanwhile, the sewage subjected to oil-water separation in the oil-water separation zone enters the first deep treatment zone 104 through the water through holes 103, and the sewage in the first deep treatment zone is subjected to oil collection through the conical oil collection cover in the first deep treatment zone, and the floating oil is collected in the corresponding oil collection tank cavity. While the first deep treatment area collects oil, the sewage overflows into the second deep treatment area 105 after being filtered by the corresponding filter 13, and the sewage collects oil by the conical oil collecting cover in the second deep treatment area and concentrates floating oil in the corresponding oil collecting tank cavity. While the second advanced treatment area collects oil, the sewage overflows to the clear water area 106 after being filtered by the filter in the second advanced treatment area, and the oil is collected by the conical oil collecting cover in the clear water area, and the floating oil is collected in the corresponding oil collecting tank. And finally, discharging the sewage treated by the clear water area to the outside through a three-way drainage pipe 4 to realize standard discharge. When the floating oil in the oil collecting cavity of each treatment area is collected to a certain degree, the oil discharge pump 14 is started to collect the floating oil in each oil collecting cavity into the oil collecting tank 5. When the oil collecting tank is full of oil, the valve of the oil outlet pipe 6 at the bottom in the oil collecting tank is opened to realize oil discharging operation.

Claims

1. An intelligent catering oil-sewage treatment device with an early warning function is characterized in that the main body of the device is a rectangular device box body (1), a buffer area (101), an oil-water separation area (102), a first advanced treatment area (104), a second advanced treatment area (105) and a clear water area (106) are sequentially formed in the device box body from the front end to the rear end in a separating mode through partition plates along the length direction, a water inlet (3) is formed in the top of the buffer area, a three-way drain pipe (4) is arranged in the clear water area, and an overflow pipe A (8) is arranged in the buffer area and is communicated with the oil-water separation area in an overflowing; the device is characterized in that the oil-water separation zone (102) is communicated with the first advanced treatment zone (104) through a water through hole (103) below the two partition plates, the first advanced treatment zone is communicated with the second advanced treatment zone (105) in an overflowing way through an overflow port A (107) above the two partition plates, and the second advanced treatment zone is communicated with the clear water zone in an overflowing way through an overflow port B (108) above the two partition plates; conical oil collecting covers (9) are fixedly arranged at the positions of the liquid levels of the oil and water separating area, the first deep treatment area, the second deep treatment area and the clear water area, the middle parts of the conical oil collecting covers are provided with oil collecting groove cavities (901) protruding for collecting oil, filter placing frames (12) connected with the conical oil collecting covers into a whole are arranged in the first deep treatment area and the second deep treatment area, a filter (13) is placed in each filter placing frame, the water inlet end of each filter is positioned below the overflow liquid level of the corresponding treatment area, and the water outlet end of each filter is communicated with the overflow port of the rear side partition plate of the corresponding treatment area; overflow channels (109) are formed between the conical oil collecting covers of the second deep treatment area and the clear water area and the partition plates in front of the second deep treatment area and the clear water area respectively, and the overflow channels are communicated with the oil collecting groove cavities of the corresponding conical oil collecting covers; an oil collecting tank (5) and an oil discharge pump (14) are arranged on one outer side surface of the equipment tank body, the bottom surface of the oil collecting tank is an inclined surface, and an oil outlet pipe (6) with a valve is arranged at the bottom of the inclined surface; the initial oil collecting position in the oil collecting groove cavity of each conical oil collecting cover in the equipment box body is guided to the outside of the equipment box body through an oil discharging pipe (10) and is communicated with an oil inlet pipe (15) of an oil discharging pump, and a liquid outlet pipe (16) of the oil discharging pump is communicated to the inside of the oil collecting box.

2. The intelligent catering oily water treatment equipment with the early warning function according to claim 1, wherein the top of the oil collecting groove cavity (901) of each conical oil collecting cover (9) in the equipment box body (1) is connected with an overflow pipe B (11) which is horizontally communicated to the top of the oil collecting tank (5).

3. The intelligent catering oil-sewage treatment equipment with the early warning function according to claim 1 or 2, wherein a liquid level sensor is arranged in the oil collecting tank (5), and the liquid level sensor is externally connected with an alarm device.

4. The intelligent catering oily water treatment equipment with the early warning function as claimed in claim 1, wherein the bottom of the inner inclined surface of the oil collecting tank (5) is connected with one end of a return pipe (7), a valve is arranged in the return pipe, the other end of the return pipe is communicated with the inside of the oil-water separation zone (102), the return pipe is arranged in an inclined manner, one end of the return pipe connected with the oil-water separation zone is low, and the other end of the return pipe is high.

5. The intelligent catering oil-sewage treatment equipment with the early warning function according to claim 1, wherein the filter placing rack (12) is welded and fixed with the inner wall of the equipment box body (1) and a baffle plate at the rear side of the corresponding treatment area, the filter placing rack is provided with a row of filter placing bin positions (1201), each filter placing bin position is correspondingly provided with one filter (13), and the top of each filter is provided with a handle.

6. The intelligent catering oil-sewage treatment equipment with the early warning function according to claim 1, wherein the top of the cache region (101) of the equipment box body (1) is provided with an electric slag removal device (2) which comprises a motor (201), a slag removal cylinder (202) and a slag removal rod (203) with a helical blade (204), the slag removal rod is rotatably positioned in the slag removal cylinder, one end of the slag removal rod extends out of the slag removal cylinder and is in transmission connection with the motor, a liquid inlet communicated with the water inlet (3) of the cache region is formed in the side face of one end of the slag removal cylinder, a filtering slag removal hole for guiding oil-sewage to the cache region is formed in one side face of the slag removal cylinder, which is opposite to the liquid inlet, and the other end of the slag removal cylinder is connected with a; the deslagging cylinder is obliquely arranged relative to the equipment box body, one end of the deslagging cylinder where the filtering slag hole is located is low, and the other end of the deslagging cylinder is high.

7. The intelligent catering oil-sewage treatment equipment with the early warning function according to claim 1, wherein the oil discharge pipes (10) of each treatment area in the equipment box body (1) are provided with electromagnetic valves (17) which are independently controlled to be switched on and off.

8. The intelligent catering oily water treatment equipment with the early warning function as claimed in claim 1, wherein the top of each treatment area in the equipment box body (1) and the top of the oil collecting tank are respectively provided with a detachable movable cover plate, and the movable cover plates are provided with handles.

9. The intelligent catering oil-sewage treatment equipment with the early warning function according to claim 1, wherein the overflow pipe A (8) is an L-shaped pipe, an upper pipe orifice of the L-shaped pipe is positioned in the cache region (101), a lower pipe orifice of the L-shaped pipe is communicated to the oil-water separation region (102), a lower pipe orifice of the L-shaped pipe is lower than the overflow port A (107) and higher than a water through hole (103) of the first deep treatment region (104), and the lower pipe orifice and the water through hole of the L-shaped pipe are distributed on two sides of the equipment box body (1) in the width direction.