CN110563174B - Multiphase separation method and system for oil-containing wastewater treatment - Google Patents
Multiphase separation method and system for oil-containing wastewater treatment Download PDFInfo
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- CN110563174B CN110563174B CN201910771478.7A CN201910771478A CN110563174B CN 110563174 B CN110563174 B CN 110563174B CN 201910771478 A CN201910771478 A CN 201910771478A CN 110563174 B CN110563174 B CN 110563174B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Physical Water Treatments (AREA)
- Removal Of Floating Material (AREA)
Abstract
The invention discloses a multiphase separation method and a multiphase separation system for oil-containing wastewater treatment, which belong to the technical field of wastewater treatment and comprise a box body, a floating oil pipe, an oil collecting pipe, an air inlet pipe, a bubbler, a booster pump and a filter, wherein the floating oil pipe, the oil collecting pipe, the bubbler, the booster pump and the filter are all arranged in the box body, two partition boards are arranged in the box body to divide an inner cavity of the box body into three cavities, a liquid inlet pipe is arranged at the bottom of the right side of the first cavity, the multiphase separation system for oil-containing wastewater treatment is combined through three different methods to form a finished separation system, and compared with the existing single-phase filtration method, the method can effectively improve the oil-containing wastewater treatment effect, and effectively improve the oil-containing wastewater separation effect and efficiency by being matched with the separation system through the separation method.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a multiphase separation method and system for oil-containing wastewater treatment.
Background
Oil-containing wastewater is often encountered in petroleum and petrochemical industry, machine manufacturing, urban life and the like, and the removal of oil in the wastewater is often the primary treatment task. The oil-water separation method is many, and common methods include gravity sedimentation, centrifugal sedimentation, air-float, coagulation filtration, adsorption, membrane separation and the like, and various treatment methods have respective advantages and specific application ranges. The air floatation method has mature process, low cost and large treatment capacity, and can effectively remove emulsified oil with the particle size of 0.1-10 mu m and partial soluble pollution components in the wastewater, so that the air floatation method is widely applied to the treatment of wastewater in petroleum exploitation, petrochemical industry, mechanical manufacturing, food oil production and the like. The main disadvantage is that the floating oil is difficult to treat, and the hydraulic retention time is long; when the treatment capacity is large, large-scale air floatation equipment needs to be built, the occupied area is large, and the investment cost is high. Besides the air floatation method, the hydrocyclone based on the centrifugal separation technology is increasingly widely applied to the treatment of oily wastewater since the 90 th century, and the method utilizes the density difference of oil and water phases to generate centrifugal force in a cyclone cavity to implement phase separation and has the advantages of compact structure, small occupied area, simple operation and maintenance and the like. But the particle size range of the oil droplets which can be removed by the method is not less than 20 mu m, the processing capacity of the hydrocyclone monomer is very limited, and when the processing capacity is large, a plurality of monomers are required to be operated in parallel, so that the processing and manufacturing difficulties are high, and the maintenance is inconvenient.
Disclosure of Invention
The invention aims to provide a multiphase separation method and a multiphase separation system for oil-containing wastewater treatment, which are used for solving the problem that the conventional device proposed in the background art is poor in treatment effect for treating oil-containing wastewater.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a multiphase separation method and system for oily wastewater treatment, includes box, oil-floating pipe, oil-collecting pipe, intake pipe, bubbler, booster pump and filter, oil-floating pipe, oil-collecting pipe, bubbler, booster pump and filter are all installed in the box, install two baffles in the box and separate the box inner chamber into three cavity, sealed perpendicular installation between two baffles, sealing connection forms the second cavity between the bottom and the top of a baffle and the box inner chamber, and another baffle is the horizontal baffle of installing and makes it form first cavity and third cavity between the inner chamber right side wall of box and a baffle, oil-floating pipe's one end runs through the baffle of vertical installation, oil-collecting pipe installs in the inner chamber left side of box, the intake pipe is installed at the outer wall of box, the output of intake pipe runs through the box and is connected with the bubbler, the input and the oil-collecting pipe of booster pump are connected, the output and the filter of booster pump are connected, three liquid level sensor is evenly installed to the inner chamber left side wall of box and the bottom of box inner chamber and the right side wall, liquid level sensor and external control device have liquid level sensor and the right side of the inner chamber, the right side of the first cavity of the right side of box is installed.
Preferably, the oil collecting pipe is composed of three oil pipes with different heights, and the bottoms of the three oil pipes are connected with the input end of the booster pump through transverse oil pipes.
Preferably, the oil collecting pipe and the floating oil pipe are respectively provided with an oil inlet funnel and a valve, the top of the outer wall of the oil inlet funnel is uniformly provided with a plurality of grooves, the valve is an electromagnetic valve, and the valve is connected with an external control device.
Preferably, the bubbler comprises a bubbler and a stirrer, wherein the stirrer and the bubbler are both arranged in the inner cavity of the shell of the bubbler, through holes are uniformly formed in the outer wall of the shell of the bubbler, the stirrer and the bubbler are both composed of a honeycomb plate and a motor, and the honeycomb plate is uniformly arranged at the output end of the motor.
Preferably, the filter comprises support and filter core, the filter core passes through the support to be fixed, the inner wall and the intake-tube connection of filter core, the filter core is laid by sponge layer, active carbon layer and sand stone layer and is constituteed.
Preferably, the separation method is as follows:
step one: injecting the oily wastewater into the first cavity from the liquid inlet pipe, and injecting the oil-water mixture at the top layer into the second cavity after the height of the oily wastewater reaches the height of an oil inlet funnel at the top end of the oil flotation pipe according to the characteristics of the oily wastewater;
step two: when the oily wastewater in the second cavity reaches the oil inlet funnel position at the top end of the oil collecting pipe at the highest position, closing valves on the oil collecting pipe and the floating oil pipe, and injecting external air into the second cavity through the air inlet pipe;
step three: starting a foaming machine and a stirrer in the foaming machine, enabling oil-containing wastewater to contact with air for washing, and then enabling the oil-containing wastewater to rotate through the foaming machine and the stirrer to generate a large number of micro bubbles to contact with oil and hydrophobic particles in the oil-containing wastewater, so that the oil and the hydrophobic particles in the wastewater float to the surface along with the bubbles;
step four: after oil contacts with bubbles, a valve on the highest oil collecting pipe is opened according to a liquid level sensor, so that oily wastewater and hydrophobic particles are discharged from the highest oil collecting pipe, wastewater at the bottom is discharged from a liquid outlet pipe arranged on a second cavity, the water level reaches the positions of a second oil collecting pipe and a third oil collecting pipe according to the same method, and oil discharging treatment is carried out for three times;
step five: the oil-containing wastewater in the oil collecting pipe is pressurized through the booster pump and then is discharged into the third cavity through the filter, and the filtered wastewater is discharged from a liquid outlet pipe arranged on the third cavity.
Compared with the prior art, the invention has the beneficial effects that: according to the multiphase separation method and system for oil-containing wastewater treatment, the multiphase separation system for oil-containing wastewater treatment is combined through three different methods to form a finished separation system, so that the generated oil-containing wastewater is subjected to three different oil removal systems to filter oil.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the oil inlet funnel structure of the present invention;
FIG. 3 is a schematic view of a bubbler of the present invention;
FIG. 4 is a schematic view of a filter according to the present invention.
In the figure: 100 box bodies, 101 liquid inlet pipes, 102 liquid outlet pipes, 103 liquid level sensors, 110 floating oil pipes, 120 oil collecting pipes, 121 oil inlet funnels, 122 valves, 130 air inlet pipes, 140 bubblers, 141 stirring machines, 142 bubbling machines, 150 booster pumps, 160 filters, 161 supports and 162 filter cores.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides the following technical scheme: referring to fig. 1, the multiphase separation method and system for oil-containing wastewater treatment are used for improving the separation effect and efficiency of oil-containing wastewater, and comprise a box body 100, a floating oil pipe 110, an oil collecting pipe 120, an air inlet pipe 130, a bubbler 140, a booster pump 150 and a filter 160, wherein the floating oil pipe 110, the oil collecting pipe 120, the bubbler 140, the booster pump 150 and the filter 160 are all arranged in the box body 100, two partition plates are arranged in the box body 100 to divide the inner cavity of the box body 100 into three cavities, the two partition plates are vertically arranged in a sealing manner, one partition plate is in sealing connection with the bottom and the top of the inner cavity of the box body 100 to form a second cavity, the other partition plate is transversely arranged between the right side wall of the inner cavity of the box body 100 and one partition plate to form a first cavity and a third cavity, one end of the floating oil pipe 110 penetrates through the partition plate vertically arranged, the oil collecting pipe 120 is arranged on the left side of the inner cavity of the box body 100, the air inlet pipe 130 is arranged on the outer wall of the box body 100, the output end of the air inlet pipe 130 penetrates through the box body 100 to be connected with the bubbler 140, the input end of the booster pump 150 is connected with the oil collecting pipe 120, the output end 103 of the output end of the booster pump 150 is connected with the inner cavity 103 of the filter 103 is connected with the inner cavity of the first liquid level sensor 102, the liquid level sensor is arranged on the right side of the bottom of the box body is connected with the bottom of the first liquid sensor cavity 101, and the liquid level sensor is arranged on the right side of the bottom of the inner cavity is uniformly arranged on the side of the bottom of the box body is connected with the bottom, and the bottom of the liquid sensor is connected with the liquid level sensor is 101.
Referring to fig. 1 again, the oil collecting pipe 120 is composed of three oil pipes with different heights, the bottoms of the three oil pipes are connected with the input end of the booster pump 150 through transverse oil pipes, specifically, the oil collecting pipes 120 with different heights can collect the oil slivers with different water levels in the second cavity, meanwhile, the purpose of collecting the oil slivers for three times is achieved, and the collected oil slivers are connected with the booster pump 150 to achieve the effect of boosting.
Referring to fig. 1-2 again, the oil collecting pipe 120 and the oil floating pipe 110 are provided with an oil inlet funnel 121 and a valve 122, the top of the outer wall of the oil inlet funnel 121 is uniformly provided with a plurality of grooves, the valve 122 is an electromagnetic valve, the valve 122 is connected with an external control device, specifically, the oil inlet funnel 121 is used for improving the collection efficiency of the oil floating, the outer wall of the oil inlet funnel 121 is provided with the grooves, the hydrophobicity generated between the oil and the oil inlet funnel 121 is reduced, meanwhile, the collection thickness of the oil is improved, and the valve 122 is used for performing closed opening operation on different oil pipes, so that the aim of opening different water valves with different water levels is achieved.
Referring to fig. 1 and 3 again, the bubbler 140 is composed of a bubbler 142 and a stirrer 141, the bubbler 141 and the bubbler 142 are both installed in the inner cavity of the shell of the bubbler 140, through holes are uniformly formed in the outer wall of the shell of the bubbler 140, the bubbler 141 and the bubbler 140 are both composed of a honeycomb plate and a motor, the honeycomb plate is uniformly installed at the output end of the motor, specifically, the bubbler 142 and the stirrer 141 are used for fully mixing injected air with oily wastewater, so that bubbles enter the oily wastewater, fully contact with oil and hydrophobic particles in the oily wastewater, drive the oil and the hydrophobic particles to rise, and the through holes are formed in the shell of the bubbler 140, so that the output speed of the bubbles can be effectively improved.
Referring to fig. 1 and 4 again, the filter 160 is composed of a bracket 161 and a filter element 162, the filter element 162 is fixed by the bracket 161, the inner wall of the filter element 162 is connected with the air inlet pipe 130, the filter element 162 is composed of a sponge layer, an activated carbon layer and a sand stone layer, specifically, the bracket 161 is used for fixing the filter element 162 and the air inlet pipe 130, and oil-containing wastewater flushed under high pressure is filtered by the surface oil, hydrophobic particles and hydrophilic particles after passing through the filter element 162, so that the wastewater after water filtration is discharged from the liquid outlet pipe 102.
The separation method comprises the following steps:
step one: injecting the oily wastewater into the first cavity from the liquid inlet pipe 101, and injecting the oil-water mixture on the top layer into the second cavity after the height of the oily wastewater reaches the height of the oil inlet funnel 121 at the top end of the floating oil pipe 110 according to the characteristics of the oily wastewater;
step two: when the oily wastewater in the second cavity reaches the position of the oil inlet funnel 121 at the top end of the oil collecting pipe 120 at the highest position, closing the valves 122 on the oil collecting pipe 120 and the oil floating pipe 110, and injecting external air into the second cavity through the air inlet pipe 130;
step three: starting a foaming machine 142 and a stirrer 141 in the foamer 140, enabling oil-containing wastewater to contact air for washing, and then enabling the oil-containing wastewater to rotate through the foaming machine 142 and the stirrer 141 to generate a large number of micro bubbles to contact oil and hydrophobic particles in the oil-containing wastewater, so that the oil and the hydrophobic particles in the wastewater float to the surface along with the bubbles;
step four: after the oil contacts with the bubbles, according to the liquid level sensor 103, a valve 122 on the highest oil collecting pipe 120 is opened, so that the oil-containing wastewater and hydrophobic particles are discharged from the highest oil collecting pipe 120, the wastewater at the bottom is discharged from a liquid outlet pipe 102 arranged on the second cavity, the water level reaches the positions of the second oil collecting pipe and the third oil collecting pipe according to the same method, and the oil discharging treatment is carried out for three times;
step five: the oily wastewater in the oil collecting pipe 120 is pressurized by the booster pump 150 and then discharged into the third cavity through the filter 160, and the filtered wastewater is discharged from the liquid outlet pipe 102 installed on the third cavity.
While the invention has been described with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the features of the various embodiments disclosed herein may be combined with each other in any manner so long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of brevity and resource saving. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (4)
1. A multiphase separation system for oil-containing wastewater treatment is characterized in that: comprises a box body (100), a floating oil pipe (110), an oil collecting pipe (120), an air inlet pipe (130), a bubbler (140), a booster pump (150) and a filter (160), wherein the floating oil pipe (110), the oil collecting pipe (120), the bubbler (140), the booster pump (150) and the filter (160) are all arranged in the box body (100), two partition boards are arranged in the box body (100) to divide the inner cavity of the box body (100) into three cavities, the two partition boards are vertically arranged in a sealing way, one partition board is connected with the bottom and the top of the inner cavity of the box body (100) in a sealing way to form a second cavity, the other partition board is transversely arranged between the right side wall of the inner cavity of the box body (100) and one partition board to form a first cavity and a third cavity, one end of the floating oil pipe (110) penetrates through the partition board which is vertically arranged, the oil collecting pipe (120) is arranged at the left side of the inner cavity of the box body (100), the air inlet pipe (130) is arranged on the outer wall of the box body (100), the output end of the air inlet pipe (130) penetrates the box body (100) to be connected with the bottom and the top of the inner cavity of the box body (100), the other partition board is connected with the liquid level sensor (103) and the liquid level sensor (150) is connected with the outer side wall of the sensor (103) of the box body (100), the bottom of the second cavity, the right side of the third cavity and the right side of the first cavity of the inner cavity of the box body (100) are provided with liquid outlet pipes (102), and the bottom of the right side of the first cavity is provided with a liquid inlet pipe (101);
the oil collecting pipe (120) consists of three oil pipes with different heights, and the bottoms of the three oil pipes are connected with the input end of the booster pump (150) through transverse oil pipes;
oil inlet funnels (121) and valves (122) are arranged on the oil collecting pipes (120) and the oil floating pipes (110), a plurality of grooves are uniformly formed in the tops of the outer walls of the oil inlet funnels (121), the valves (122) are electromagnetic valves, and the valves (122) are connected with an external control device.
2. The multiphase separation system for treating oily wastewater of claim 1, wherein: the bubbler (140) consists of a bubbler (142) and a stirrer (141), the stirrer (141) and the bubbler (142) are both arranged in the inner cavity of the shell of the bubbler (140), through holes are uniformly formed in the outer wall of the shell of the bubbler (140), the stirrer (141) and the bubbler (140) consist of honeycomb plates and a motor, and the honeycomb plates are uniformly arranged at the output end of the motor.
3. The multiphase separation system for treating oily wastewater of claim 1, wherein: the filter (160) is composed of a support (161) and a filter element (162), the filter element (162) is fixed through the support (161), the inner wall of the filter element (162) is connected with the air inlet pipe (130), and the filter element (162) is paved by a sponge layer, an activated carbon layer and a sand stone layer.
4. A separation method of a multiphase separation system for oil-containing wastewater treatment according to any one of claims 1 to 3, characterized in that: the separation method comprises the following steps:
step one: injecting the oily wastewater into the first cavity from the liquid inlet pipe (101), and injecting the oil-water mixture on the top layer into the second cavity after the height of the oily wastewater reaches the height of an oil inlet funnel (121) at the top end of the floating oil pipe (110) according to the characteristics of the oily wastewater;
step two: when the oily wastewater in the second cavity reaches the position of an oil inlet funnel (121) at the top end of the oil collecting pipe (120) at the highest position, closing valves (122) on the oil collecting pipe (120) and the oil floating pipe (110), and injecting external air into the second cavity through an air inlet pipe (130);
step three: starting a foaming machine (142) and a stirrer (141) in the foaming machine (140), enabling oil-containing wastewater to be in contact with air for washing, and enabling a large number of micro bubbles to be in contact with oil and hydrophobic particles in the oil-containing wastewater through rotation of the foaming machine (142) and the stirrer (141), so that the oil and the hydrophobic particles in the wastewater float to the surface along with the bubbles;
step four: after the oil contacts with the bubbles, according to the liquid level sensor (103), a valve (122) on the highest oil collecting pipe (120) is opened, so that oily wastewater and hydrophobic particles are discharged from the highest oil collecting pipe (120), the wastewater at the bottom is discharged from a liquid outlet pipe (102) arranged on the second cavity, the water level reaches the positions of the second oil collecting pipe and the third oil collecting pipe according to the same method, and oil discharge treatment is carried out for three times;
step five: the oily wastewater in the oil collecting pipe (120) is pressurized through the booster pump (150) and then is discharged into the third cavity through the filter (160), and the filtered wastewater is discharged from the liquid outlet pipe (102) arranged on the third cavity.
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| CN201910771478.7A CN110563174B (en) | 2019-08-21 | 2019-08-21 | Multiphase separation method and system for oil-containing wastewater treatment |
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| CN201910771478.7A CN110563174B (en) | 2019-08-21 | 2019-08-21 | Multiphase separation method and system for oil-containing wastewater treatment |
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| CN110563174B true CN110563174B (en) | 2023-06-02 |
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| JP2006116395A (en) * | 2004-10-20 | 2006-05-11 | Fec:Kk | Treatment method of oil-containing waste water |
| JP2011020025A (en) * | 2009-07-14 | 2011-02-03 | Panasonic Corp | Oil-water separator |
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