CN106554100B - Oily water treatment equipment and treatment method thereof - Google Patents

Oily water treatment equipment and treatment method thereof Download PDF

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Publication number
CN106554100B
CN106554100B CN201610948724.8A CN201610948724A CN106554100B CN 106554100 B CN106554100 B CN 106554100B CN 201610948724 A CN201610948724 A CN 201610948724A CN 106554100 B CN106554100 B CN 106554100B
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oil
water
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sedimentation
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CN106554100A (en
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金德明
黄飞亚
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Ningbo Blue Environment Science And Technology Ltd
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Ningbo Blue Environment Science And Technology Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Floating Material (AREA)

Abstract

The invention relates to an oily water treatment device and a treatment method thereof, wherein an upper layer of sedimentation area and a lower layer of sedimentation area are arranged to realize full sedimentation, an inclined plane is formed at the bottom of a first sedimentation area for waste recovery, a second sedimentation area is formed below the inclined plane of the first sedimentation area, the two sedimentation areas are communicated through a first overflow pipeline, and a control valve controlled by a water level induction switch is arranged in the pipeline. The second sedimentation area is communicated with the oil-water separation area through a second overflow pipeline, the top of the oil-water separation area is provided with an oil collecting chamber and an oil overflow port, the oil-water separation area and the oil collecting chamber are separated by a baffle plate to form a left part chamber and a right part chamber, and the baffle plate is provided with a conduit for conducting the two parts of chambers; the right cavity of the oil-water separation zone is adjacently provided with a filtering zone and a clear water zone, the filtering zone is provided with a filtering layer, the upper part of the filtering layer is connected with the bottom of the right cavity of the oil-water separation zone through a third overflow pipe, the lower part of the filtering layer is connected to the upper part of the clear water zone through a flow guide pipe with a switch valve, and the clear water zone is correspondingly provided with a water outlet.

Description

Oily water treatment equipment and treatment method thereof
Technical Field
The invention relates to sewage treatment equipment, in particular to oily sewage treatment equipment and a treatment method thereof.
Background
With the rapid pace of social development and the continuous expansion of urban scale, urban pollution has become a major problem in the current society, especially water pollution, which is not only difficult to treat for a long time, but also has larger treatment difficulty, improper treatment, easy diffusion pollution and adverse to the sustainable development of the environment. For sewage treatment, the key point is to control the pollution source, and only the pollution source is treated in time, the subsequent treatment can be ensured, and the pollution can be reduced. Therefore, the prior art has disclosed some sewage treatment devices, these sewage treatment devices mostly include sedimentation zone, filtration zone, sedimentation zone is used for the sediment of sewage, and the filtration zone then filters the purification to sewage, according to different industry needs, for example industry that needs oil water treatment such as food and beverage, then need set up corresponding oil water separation district, utilize the density of oil to be less than water, conveniently collect the processing with suspending in the oil of surface of water upper strata, carry out filtration purification to sewage again, will accord with the effluent water of emission standard and discharge municipal sewage pipeline at last. However, the existing sewage treatment equipment for catering industry is poor in sedimentation treatment, so that more impurities are doped in sewage, oil-water separation and subsequent filtering and purifying operation are affected, and after long-time treatment, pipeline blockage is often easy to occur, so that the problem of relatively complicated maintenance and cleaning is caused. For this reason, improvements to existing sewage treatment plants are desired.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide the oily water treatment equipment and the treatment method thereof for the field, so that the technical problems of poor sewage treatment effect and inconvenient cleaning and maintenance of the existing similar equipment are solved. The aim is achieved by the following technical scheme.
The main body of the oil sewage treatment equipment is a filtering box body, a deslagging area, a sedimentation area, an oil-water separation area, a filtering area and a clear water area are arranged in the filtering box body in a separating way, deslagging mesh screens are arranged in the deslagging area, and the position of a material opening of each deslagging mesh screen corresponds to a sewage inlet of the filtering box body; the oil collecting device is characterized in that a first sedimentation area is formed below the deslagging mesh screen, an inclined plane is formed at the bottom of the first sedimentation area and used for collecting solid residues, a discharge hole with a valve is formed at the bottom of the inclined plane, a second sedimentation area is formed below the inclined plane of the first sedimentation area, the inclined plane has an oil collecting effect on the second sedimentation area, and floating oil in the second sedimentation area is conveniently guided into an oil-water separation area to be collected and discharged. The side surface of the first sedimentation zone is provided with a first overflow pipe leading to the second sedimentation zone, and a control valve is arranged in the first overflow pipe; a water level sensing switch for sensing the water level in the first sedimentation zone and controlling the control valve is arranged in the first sedimentation zone; the oil-water separation area is arranged in the adjacent area of the second sedimentation area, the second sedimentation area is communicated with the oil-water separation area through a second overflow pipe, and the horizontal position of a pipe orifice of the second overflow pipe positioned in the second sedimentation area is higher than the bottom of the inclined plane of the first sedimentation area; the top of the oil-water separation zone is provided with an oil collecting chamber, the oil-water separation zone is internally provided with a baffle plate for separating the oil-water separation zone and the oil collecting chamber into a left chamber and a right chamber, the baffle plate positioned in the oil collecting chamber is vertical, oil collecting chambers at two sides formed by separating the oil collecting chamber are respectively and correspondingly provided with an oil discharge port, the baffle plate positioned in the oil-water separation zone is an inclined plate, the inclined plate is a left chamber and inclines downwards towards a right chamber, the inclined plate is provided with a conduit for conducting the two chambers, and the pipe orifice level of the conduit positioned in the right chamber is higher than the pipe orifice level of the conduit positioned in the left chamber; the right cavity of the oil-water separation area is provided with a filtering layer, the upper part of the filtering layer is connected with the bottom of the right cavity of the oil-water separation area through a third overflow pipe, the lower part of the filtering layer is connected to the upper part of the clear water area through a flow guide pipe with a switch valve, the clear water area is correspondingly provided with a water outlet, and the water outlet water level is lower than the pipe orifice water level of the third overflow pipe above the filtering layer and lower than the pipe orifice water level of the flow guide pipe of the clear water area; the water level of the pipe orifice of the third overflow pipe in the filtering area is lower than the water level of the pipe orifice of the first overflow pipe in the first sedimentation area and higher than the upper end surface of the oil collecting chamber in the oil-water separation area. Through the structure, the sewage is treated step by step, and the first sedimentation area and the second sedimentation area are arranged, so that the sewage is fully sedimentated, and solid suspended matters are removed, so that the subsequent oil-water separation and filtration effects are better. Especially, the first sedimentation zone is provided with a water level induction switch, namely, the first sedimentation zone can discharge sewage to the second sedimentation zone when the water level reaches a certain degree, so that the sewage in the first sedimentation zone is fully precipitated and separated, and the water quality and the water quantity of the sewage in the first sedimentation zone are greatly changed, so that the first sedimentation zone is provided with a certain water level discharge, the impact on equipment in a subsequent treatment zone is effectively reduced, the long-time effective operation of the oil sewage treatment equipment is maintained, and the sewage treatment efficiency is improved.
The filter box body is located the discharge gate below of first sedimentation zone is equipped with the space that is used for placing the waste collection bucket. Through this structure, make things convenient for the impurity of first sedimentation zone sediment to in time discharge to keep first sedimentation zone to keep better sedimentation effect, and then improve follow-up treatment effect.
The oily water treatment equipment also comprises a back flush water pump, wherein a water inlet of the back flush water pump is connected into the clear water zone, and a water outlet of the back flush water pump is connected below a filter layer in the filter zone; when the back flushing water pump is turned on, a control valve in the first overflow pipe is turned on, and a switching valve of a flow guide pipe from the filtering area to the clear water area is turned off. By additionally arranging the back flushing water pump, the pipeline of the oil sewage treatment equipment is conveniently back flushed, and simultaneously, the filtering filler of the filtering layer is back flushed, so that the water passing rate of the filtering layer is ensured, the better sewage treatment effect of the equipment is maintained, and the times of disassembly or maintenance are reduced.
An air floatation device is arranged at the bottom of the oil-water separation zone, and an air floatation port of the air floatation device is close to the outlet end of the second overflow pipe; a guide plate for guiding bubbles to face the oil collecting chamber is arranged at the bottom of the oil-water separation zone and close to the air floatation port; an exhaust pipe is arranged at the top of the oil collecting chamber. Through addding air supporting device, when sewage flows into the work of oil water separation district air supporting machine, the release head will release a large amount of tiny bubbles, and the in-process that tiny bubbles risen makes the gathering of tiny particle suspension oil become big granule oil slick with the suspension oil contact collision in the sewage, improves oil water separation's effect, and then improves sewage treatment effect.
And an installation chamber for installing a gas-liquid mixing pump and a controller is arranged in the filter box body and adjacent to the filter area. The whole equipment has a compact structure, and the space utilization rate in the equipment is improved.
And drain outlets are arranged at the bottoms of the second sedimentation zone, the oil-water separation zone, the filtering zone and the clear water zone. Through setting up the drain, the convenient long-term back equipment inside of using deposits discharge and the washing of impurity.
The top of the oil-water separation area is provided with an arc-shaped guide surface for guiding and converging liquid level oil to the oil collecting chamber, so that the oil collecting effect is improved.
The treatment method of the oily water treatment equipment comprises a filtering method and a back flushing method.
The filtering method comprises the following steps: sewage enters the deslagging mesh screen from a sewage inlet of the filtering box body, and enters the first sedimentation zone for sedimentation operation after deslagging; when the water level sensing switch of the first sedimentation zone senses that the water level accords with a set value, the control valve is controlled to be opened, sewage in the first sedimentation zone overflows to the second sedimentation zone through the first overflow pipe to be sedimentated, when the water level in the second sedimentation zone is higher than the height of a water inlet pipe orifice of the second overflow pipe, sewage overflows to a left cavity of the oil-water separation zone through the second overflow pipe, oil is separated because the oil-water density is smaller than that of water, oil is concentrated in the oil collecting chamber, and overflows and collects floating oil from the oil drain port along with the rise of the oil level, sewage is continuously sprayed to a right cavity through a guide pipe on the partition board from the left cavity, oil-water separation is carried out again, floating oil suspension is concentrated in the oil collecting chamber, and overflows and collects from the oil drain port along with the rise of the oil level; the sewage subjected to oil-liquid separation enters the upper part of the filter layer of the filter area along the third overflow pipe, the water filtered by the filter layer flows from the guide pipe to the clear water area, and is finally discharged from the water outlet along with the rise of the water level; and discharging impurities at the bottom of the first sedimentation zone by opening a valve at the bottom of the first sedimentation zone.
The back flushing method comprises the following steps: and starting the back flush water pump, simultaneously starting a control valve of the first overflow pipe, and closing a switching valve of the guide pipe, wherein the back flush water pump sends water in the clear water zone to the bottom of the filter layer of the filter zone, the water reversely flows along the filter layer, and suspended matters of the filter layer are brought out to play a role in back flushing the filter layer. And then backwashed water flows reversely along the sewage flowing direction in the filtering method, and correspondingly forms backwashed for each area in the guide pipe, the second overflow pipe, the first overflow pipe and the filtering box body, so that the stable operation of the equipment is ensured.
The invention has compact and reasonable integral structure, good sewage treatment effect, backwash function, pipeline blockage reduction, sewage treatment reliability improvement and cleaning maintenance reduction. The device is suitable for being used as various sewage treatment equipment which needs oil-water separation, such as catering, or the like, or the structural improvement of the similar equipment.
Drawings
Fig. 1 is a schematic view of the internal structure of the present invention.
Fig. 2 is a schematic top view of fig. 1.
Fig. 3 is a left-hand structural schematic diagram of fig. 1.
The serial numbers and names in the figures are: 1. the sewage inlet, 2, a deslagging mesh screen, 3, a first sedimentation area, 301, an inclined plane, 4, a water level sensing switch, 5, a first overflow pipe, 6, a control valve, 7, a second sedimentation area, 8, a waste collection barrel, 9, a second overflow pipe, 10, an oil-water separation area, 1001, a left cavity, 1002, a right cavity, 1003, an oil collecting chamber, 1004, an oil drain port, 1005, an exhaust pipe, 1006, a guide plate, 1007, a partition plate, 1008, a guide pipe, 1009, an arc guide surface, 11, an air floatation device, 12, a third overflow pipe, 13, a filtering area, 1301, a guide pipe, 1302, a water drain, 14, a filter layer, 15, a back flushing water pump and 16 clear water areas.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1-3, the main body of the oily water treatment equipment is a filtering box body, a deslagging area, a sedimentation area, an oil-water separation area, a filtering area 13, an equipment installation area and a clear water area 16 are formed in the filtering box body in a separated mode, a deslagging mesh screen 2 is arranged in the deslagging area, and the position of a feed inlet of the deslagging mesh screen corresponds to the sewage inlet 1 of the filtering box body. The below of slagging-off mesh screen forms first sedimentation zone 3, and first sedimentation zone bottom forms inclined plane 301, and the inclined plane bottom is equipped with the discharge gate of taking the valve, and the discharge gate below is equipped with the space that is used for placing waste collection bucket 8. A second sedimentation zone 7 is formed below the inclined plane of the first sedimentation zone, a first overflow pipe 5 leading to the second sedimentation zone is arranged on the side surface of the first sedimentation zone, and a control valve 6 is arranged in the first overflow pipe; the first sedimentation zone is also internally provided with a water level sensing switch 4 for sensing the water level in the first sedimentation zone and controlling the opening and closing of the control valve. The oil-water separation area is arranged in the area adjacent to the right side of the second sedimentation area, the second sedimentation area is communicated with the oil-water separation area through a second overflow pipe 9, and the horizontal position of a pipe orifice of the second overflow pipe positioned in the second sedimentation area is higher than the bottom of the inclined plane of the first sedimentation area. The top of the oil-water separation zone is provided with an arc-shaped guide surface for collecting oil, and the middle part of the arc-shaped guide surface is convexly provided with an oil collecting chamber 1003; an air floatation device 11 is arranged at the bottom of the oil-water separation zone, and an air floatation port of the air floatation device is close to the outlet end of the second overflow pipe; a guide plate 1006 for guiding bubbles to the oil collecting chamber is arranged at the bottom of the oil-water separation zone and close to the air floatation port. The oil-water separation area is internally provided with a partition plate 1007 for separating the oil-water separation area and the oil collecting chamber into a left chamber and a right chamber, the partition plate positioned in the oil collecting chamber is vertical, two sides of the oil collecting chamber formed by separating the oil collecting chamber are respectively and correspondingly provided with an oil drain 1004, the oil drain is externally connected with an oil outlet pipeline with a valve, and the oil outlet pipeline is connected to an external oil collecting barrel. The baffle plate in the oil-water separation area is an inclined plate, the inclined plate is a left cavity 1001 and inclines downwards towards a right cavity 1002, the inclined plate is provided with a guide pipe 1008 for conducting the two parts of cavities, and the pipe orifice level of the guide pipe in the right cavity is higher than that of the guide pipe in the left cavity. The right side position adjacent to the right cavity of the oil-water separation area is provided with a filtering area, an equipment installation area and a clear water area, the filtering area is provided with a filtering layer 14, the upper part of the filtering layer is connected with the bottom of the right cavity of the oil-water separation area through a third overflow pipe 12, the lower part of the filtering layer is connected to the upper part of the clear water area through a flow guide pipe 1301 with a switch valve, the clear water area is correspondingly provided with a water outlet 1302, and the water outlet water level is lower than the pipe orifice water level of the third overflow pipe above the filtering layer and lower than the pipe orifice water level of the flow guide pipe of the clear water area. The water level of the pipe orifice of the third overflow pipe in the filtering area is lower than the water level of the pipe orifice of the first overflow pipe in the first sedimentation area and higher than the upper end surface of the oil collecting chamber in the oil-water separation area. And a gas-liquid mixing pump of the air floatation device and a controller are arranged in the equipment installation area. And drain outlets are arranged at the bottoms of the second sedimentation zone, the oil-water separation zone and the filtering zone.
The oily water treatment equipment also comprises a back flush water pump 15, wherein the back flush water pump is arranged in the clear water zone, a water inlet is connected with the clear water zone 16, and a water outlet of the back flush water pump is connected with the lower part of the filtering layer 14 of the filtering zone; when the backwash water pump is turned on, the control valve 6 in the first overflow pipe 5 is turned on and the on-off valve of the draft pipe 1301 is turned off.
The treatment method of the oily water treatment equipment comprises a filtering method and a back flushing method.
The filtering method comprises the following steps: sewage enters a deslagging mesh screen 2 from a sewage inlet 1 of the filtering box body, and enters a first sedimentation zone 3 for sedimentation operation after deslagging; when the water level sensing switch 4 of the first sedimentation zone senses that the water level accords with a set value, the control valve 6 is opened, sewage of the first sedimentation zone overflows to the second sedimentation zone 7 through the first overflow pipe 5 to be sedimented, when the water level of the second sedimentation zone is higher than the height of a water inlet pipe orifice of the second overflow pipe 9, the sewage overflows to the left cavity 1001 of the oil-water separation zone 10 through the second overflow pipe, when the sewage flows into the oil-water separation zone, the air flotation device 11 works, a large number of tiny bubbles are released from the air flotation port, the tiny bubbles are in contact with and collide with suspended oil in the sewage in the rising process, so that the small-particle suspended oil is gathered into large-particle suspended oil, the density of the suspended oil is lower than that of water, oil-water separation is achieved, oil is concentrated in the oil collection chamber 1003, oil is continuously sprayed to the right cavity 1002 along the guide pipe 1008 on the partition plate from the oil drain port 1004 along with the rise of the oil level, the oil suspension is separated again, and the suspended oil is concentrated in the oil collection chamber along with the rise of the oil drain port; the sewage after oil-liquid separation enters the upper part of the filter layer 14 in the filter area 13 along the third overflow pipe 12, the water filtered by the filter layer flows from the flow guide pipe 1301 to the clear water area 16, and is finally discharged from the water outlet 1302 along with the rise of the water level; and discharging impurities at the bottom of the first sedimentation zone by opening a valve at the bottom of the first sedimentation zone.
The back flushing method comprises the following steps: the back flush water pump 15 is started, the control valve 6 of the first overflow pipe 5 is opened, the switching valve of the flow guide pipe 1301 is closed, the back flush water pump sends water in the clear water area 16 to the bottom of the filter layer 14, the filter layer is reversely flushed, and then the back flush water reversely circulates along the sewage circulation direction in the filtering method, and accordingly, the back flush is formed on each area in the guide pipe 1008, the second overflow pipe 9, the first overflow pipe and the filtering box.
The above description is intended to illustrate the technical means of the present invention, and not to limit the technical scope of the present invention. The present invention is obviously modified by a person skilled in the art in combination with the prior common general knowledge, and also falls within the scope of protection of the claims of the present invention.

Claims (8)

1. An oily water treatment device comprises a main body, wherein a filtering box body is divided into a deslagging area, a sedimentation area, an oil-water separation area, a filtering area (13) and a clear water area (16), a deslagging mesh screen (2) is arranged in the deslagging area, and the position of a material opening of the deslagging mesh screen corresponds to a sewage inlet (1) of the filtering box body; the slag removing mesh screen is characterized in that a first sedimentation zone (3) is formed below the slag removing mesh screen (2), an inclined plane (301) is formed at the bottom of the first sedimentation zone, a discharge hole with a valve is formed at the bottom of the inclined plane, a second sedimentation zone (7) is formed below the inclined plane of the first sedimentation zone, a first overflow pipe (5) leading to the second sedimentation zone is arranged on the side surface of the first sedimentation zone, and a control valve (6) is arranged in the first overflow pipe; a water level sensing switch (4) for sensing the water level in the first sedimentation zone and controlling the control valve is arranged in the first sedimentation zone; the oil-water separation area (10) is arranged in the adjacent area of the second sedimentation area, the second sedimentation area is communicated with the oil-water separation area through a second overflow pipe (9), and the horizontal position of a pipe orifice of the second overflow pipe positioned in the second sedimentation area is higher than the bottom of the inclined plane of the first sedimentation area; the top of the oil-water separation zone is provided with an oil collecting chamber (1003), the oil-water separation zone is internally provided with a baffle plate (1007) for separating the oil-water separation zone and the oil collecting chamber into a left chamber and a right chamber, the baffle plate positioned in the oil collecting chamber is vertical, the oil collecting chambers at the two sides formed by separating the oil collecting chambers are respectively and correspondingly provided with an oil discharge port (1004), the baffle plate positioned in the oil-water separation zone is an inclined plate, the inclined plate is a left chamber and inclines downwards towards a right chamber, the inclined plate is provided with a guide pipe (1008) for conducting the two chambers, and the pipe mouth level of the guide pipe positioned in the right chamber is higher than the pipe mouth level of the guide pipe positioned in the left chamber; the right cavity of the oil-water separation area is provided with a filtering area (13) and a clear water area (16) at adjacent positions, a filtering layer (14) is arranged in the filtering area, the upper part of the filtering layer is connected with the bottom of the right cavity of the oil-water separation area through a third overflow pipe (12), the lower part of the filtering layer is connected to the upper part of the clear water area through a flow guide pipe with a switch valve, the clear water area is correspondingly provided with a water outlet (1302), and the water level of the water outlet is lower than the water level of a pipe orifice of the third overflow pipe above the filtering layer and lower than the water level of a pipe orifice of the flow guide pipe of the clear water area; the water level of the pipe orifice of the third overflow pipe in the filtering area is lower than the water level of the pipe orifice of the first overflow pipe in the first sedimentation area and higher than the upper end surface of the oil collecting chamber in the oil-water separation area.
2. The oily water treatment device according to claim 1, characterized in that the filtering box is provided with a space for placing a waste collection barrel (8) below the discharge port of the first sedimentation zone (3).
3. The oily water treatment device according to claim 1, characterized in that it further comprises a backwash water pump (15), the water inlet of which is connected to the clean water zone and the water outlet of which is connected to the filter layer (14) below the filter zone; when the back flushing water pump is turned on, a control valve (6) in the first overflow pipe (5) is turned on, and a switching valve of the flow guide pipe is turned off.
4. The oily water treatment device according to claim 1, characterized in that an air floatation device (11) is arranged at the bottom of the oil-water separation zone (10), and an air floatation port of the air floatation device is close to the outlet end of the second overflow pipe (9); a guide plate for guiding bubbles to face the oil collecting chamber (1003) is arranged at the bottom of the oil-water separation zone and close to the air floatation port; an exhaust pipe (1005) is arranged at the top of the oil collecting chamber.
5. The oily water treatment device according to claim 1, characterized in that a mounting chamber for mounting a gas-liquid mixing pump and a controller is arranged in the filtering box body at a position adjacent to the filtering area (13).
6. The oily water treatment device according to claim 1, characterized in that the bottoms of the second sedimentation zone (7), the oil-water separation zone (10), the filtration zone (13) and the clear water zone (16) are provided with drain outlets.
7. The oily water treatment device according to claim 1, characterized in that the top of the oil-water separation zone (10) is provided with an arc-shaped guide surface (1009) for guiding and converging the liquid level oil to the oil collecting chamber (1003).
8. A treatment method of an oily water treatment device, which adopts the oily water treatment device according to claim 3, characterized in that the treatment method comprises a filtration method and a back flushing method;
the filtering method comprises the following steps: sewage enters the deslagging mesh screen (2) from the sewage inlet (1) of the filtering box body, and the deslagged sewage enters the first sedimentation zone (3) for sedimentation operation; when a water level sensing switch (4) of a first sedimentation zone senses that the water level accords with a set value, the control valve (6) is controlled to be opened, sewage in the first sedimentation zone overflows to a second sedimentation zone (7) through the first overflow pipe (5) to be sedimented, when the water level in the second sedimentation zone is higher than the water inlet pipe opening height of the second overflow pipe (9), the sewage overflows to a left cavity (1001) of the oil-water separation zone (10) through the second overflow pipe, oil and water are separated due to the fact that the oil and water are separated, the oil and the oil are concentrated in the oil collecting chamber (1003), and along with the rise of the oil level, the oil overflows and is collected from the oil drain port (1004), the sewage is continuously sprayed to a right cavity (1002) along a guide pipe (1008) on the partition board (1007), oil and again is separated, and oil and is suspended and concentrated in the oil collecting chamber, and along with the rise of the oil level, the oil and overflows and is collected from the oil drain port; the sewage after oil-liquid separation enters the upper part of a filter layer (14) of the filter area (13) along the third overflow pipe (12), the water filtered by the filter layer flows from the flow guide pipe (1301) to the clear water area, and is finally discharged from the water outlet (1302) along with the rise of the water level; discharging impurities at the bottom of the first sedimentation zone by opening a valve at the bottom of the first sedimentation zone;
the back flushing method comprises the following steps: the back flush water pump (15) is started, the control valve of the first overflow pipe is opened, the switching valve of the flow guide pipe is closed, the back flush water pump sends water in the clear water area to the bottom of the filter layer of the filter area, the water flows reversely along the filter layer, and suspended matters of the filter layer are brought out to perform back flushing on the filter layer; and then reversely flowing the backwashed water along the sewage flowing direction in the filtering method, and correspondingly reversely flushing the guide pipe, the second overflow pipe, the first overflow pipe and each area in the filtering box body.
CN201610948724.8A 2016-10-26 2016-10-26 Oily water treatment equipment and treatment method thereof Active CN106554100B (en)

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CN107140758A (en) * 2017-06-16 2017-09-08 宁波泽清环保科技有限公司 Sewage from catering business processing equipment and its processing method
CN108126385B (en) * 2017-12-25 2020-08-28 安徽天健环保股份有限公司 Vacuum treatment system for cleaning catering oil removal equipment and vacuum treatment method thereof
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