CN110921942A - Swirl-air flotation oil-water separation system based on discharge plasma - Google Patents
Swirl-air flotation oil-water separation system based on discharge plasma Download PDFInfo
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- CN110921942A CN110921942A CN201911338518.5A CN201911338518A CN110921942A CN 110921942 A CN110921942 A CN 110921942A CN 201911338518 A CN201911338518 A CN 201911338518A CN 110921942 A CN110921942 A CN 110921942A
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- Prior art keywords
- air flotation
- cyclone
- wastewater
- discharge
- water separation
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
Abstract
The invention discloses a swirl-air flotation oil-water separation system based on discharge plasma, which comprises a sedimentation tank, a water suction pump, a filter, an overflow valve, a flow sensor, a pressure sensor, an electric valve, a water tank, a self-oscillation jet nozzle, a swirler, a scum barrel, a sampling valve, an industrial oxygen generator, an SED plasma generating device, a power supply and an industrial personal computer. The oily wastewater is treated by combining the wastewater pretreatment technology, the hydraulic cyclone, the air flotation and the atmospheric pressure ionization, the defects of the traditional treatment method and the single treatment method are overcome, a large number of free radicals with strong oxidizing property are generated in the reaction process, all organic matters can be almost oxidized until the organic matters are completely decomposed, the reaction condition is mild, and a series of chain reactions can be induced; the invention can be used together with other water treatment technologies, and has very important theoretical significance and wide application prospect as the pretreatment or advanced treatment of other treatment technologies.
Description
Technical Field
The invention relates to the technical field of oily wastewater treatment, in particular to a system for treating oily wastewater by combining wastewater pretreatment, hydraulic cyclone, air floatation and atmospheric pressure ionization, and particularly relates to a cyclone-air floatation oil-water separation system based on discharge plasma.
Background
Along with the rapid development of the township construction and society of China, the water consumption and the sewage discharge amount of industry, agriculture and living are greatly increased, but the relative lag of waste water treatment facilities enables a large amount of waste water to be directly discharged without treatment, so that the surrounding environment and human life are greatly threatened. In the field of oily wastewater treatment, oil substances mostly exist in the form of emulsified oil, dispersed oil and adsorbed oil in wastewater. In this form, the oil is in suspension and the particles are fine and difficult to remove. Another reason why the oily wastewater is difficult to treat is that the oily wastewater is widely available and is produced in large quantities in many production processes, such as oil extraction processes, production processes, and the like.
The oily wastewater has the characteristics of easy emulsification, poor biodegradability, complex components, difficult degradation and the like. The traditional oily wastewater treatment equipment is mainly general separation treatment equipment for separating oil from water in oily wastewater, but the separation cannot completely treat the wastewater to the range meeting the discharge standard, and the traditional treatment method needs to be combined with other methods for use, and needs to add additives, so that the reaction time is long, and the treatment process is complex.
The prior art adopts advanced oxidation technology aiming at the treatment of oily sewage, one advanced oxidation technology is used singly, the treatment effect is difficult to achieve, and several advanced oxidation technologies need to be combined for treatment. Meanwhile, the combined treatment causes large occupied area of the device and insufficient integration. Therefore, an oily wastewater treatment device with high integrated treatment efficiency is needed.
Disclosure of Invention
The invention aims to solve the problem of providing a discharge plasma-based cyclone-air flotation oil-water separation system, which combines a wastewater pretreatment technology, hydraulic cyclone, air flotation and atmospheric pressure ionization to treat oily wastewater, makes up for the defect of a single treatment method, can be combined with other wastewater treatment technologies to improve the treatment efficiency of the oily wastewater and reduce the energy consumption.
The invention adopts the following technical scheme: a swirl-air flotation oil-water separation system based on discharge plasma comprises a swirl-air flotation mixer, a swirl separator, an air dissolving pump and a liquid storage tank, wherein a liquid inlet of the air dissolving pump is connected with the liquid storage tank, an outlet of the air dissolving pump is connected with the bottom of the swirl-air flotation mixer, an air inlet of the air dissolving pump is connected with a plasma discharge device, oxygen active particles generated by the plasma discharge device and wastewater from the liquid storage tank are efficiently mixed and dissolved in the air dissolving pump, the top of the swirl-air flotation mixer further comprises a tangential liquid inlet, the tangential liquid inlet is provided with a cavitation nozzle, and an outlet of the swirl-air flotation mixer is connected with the swirl separator.
And the outlet of the cyclone separator is connected with the liquid storage tank, so that circulating work is realized.
The plasma discharge device comprises discharge tubes and a power supply, wherein the power supply is a high-frequency high-voltage power supply with adjustable voltage peak value and frequency so as to adjust the number of the discharge tubes and the discharge power according to the concentration of pollutants in the wastewater.
The cavitation nozzle is a self-oscillation cavity or a Venturi tube structure and is connected with the rotational flow-air flotation mixer along the tangential direction.
When the backwashing filter is blocked by solid impurities, the backwashing mode is started to discharge the solid impurities from the sewage outlet.
The treatment method of the swirl-air flotation oil-water separation system based on the discharge plasma comprises the following working processes:
the method comprises the following steps: carrying out filtering pretreatment on the wastewater to remove solid impurities in the organic wastewater;
step two: carrying out cyclic advanced oxidation treatment on the pretreated organic wastewater to remove oil in the pretreated organic wastewater until the pretreated organic wastewater reaches a discharge standard;
step three: and discharging the treated wastewater reaching the standard.
Compared with the prior art, the invention provides a swirl-air flotation oil-water separation system based on discharge plasma, which overcomes the defects of the traditional treatment method and the single treatment method, generates a large amount of free radicals with strong oxidizing property in the reaction process, almost oxidizes all organic matters until the organic matters are completely decomposed, has mild reaction conditions and can induce a series of chain reactions; the system adopts the technical principles of jet flow type air flotation and hydraulic cyclone to achieve the purpose of high separation efficiency. Most importantly, it can be used in combination with other water treatment techniques, as a pretreatment or as an advanced treatment for other treatment techniques.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
In the figure: 1. the device comprises a sedimentation tank, 2. a back flush filter, 3. a water pump, 4. a flow sensor, 5. an overflow valve, 6. a pressure sensor, 7. a sampling valve, 8. a water tank, 9. an electric valve, 10. a self-oscillation jet nozzle, 11. a cyclone-air flotation mixer, 12. a cyclone separator, 13. an industrial oxygen generator, 14. a power supply, 15. an SED plasma generating device, 16. a dissolved air pump, 17. a scum barrel, 18. a modulator, 19. an industrial personal computer.
Detailed Description
As shown in figure 1, the swirl-air flotation oil-water separation system based on the discharge plasma comprises a sedimentation tank (1), a filter (2), a centrifugal pump (3), a flow sensor (4), an overflow valve (5), a pressure sensor (6), a sampling valve (7), a water tank (8), an electric valve (9), a self-oscillation jet nozzle (10), a swirl-air flotation mixer (11), a swirl separator (12), an industrial oxygen generator (13), a power supply (14), an SED plasma generation device (15), a dissolved air pump (16), a scum bucket (17), a modulator (18) and an industrial personal computer (19).
The device comprises a liquid storage tank, a gas dissolving pump, a cyclone-air flotation mixer, a plasma discharge device, a tangential liquid inlet, a cavitation nozzle and a cyclone separator, wherein a liquid inlet of the gas dissolving pump is connected with the liquid storage tank, an outlet of the gas dissolving pump is connected with the bottom of the cyclone-air flotation mixer, a gas inlet of the gas dissolving pump is connected with the plasma discharge device, oxygen active particles generated by the plasma discharge device and wastewater from the liquid storage tank are efficiently mixed and dissolved in the gas dissolving pump, the top of the cyclone-air flotation mixer further comprises a tangential liquid inlet, the tangential liquid inlet is provided with the cavitation nozzle, and an outlet of the cyclone.
And the outlet of the cyclone separator is connected with the liquid storage tank, so that circulating work is realized.
The plasma discharge device comprises discharge tubes and a power supply, wherein the power supply is a high-frequency high-voltage power supply with adjustable voltage peak value and frequency so as to adjust the number of the discharge tubes and the discharge power according to the concentration of pollutants in the wastewater.
The cavitation nozzle is a self-oscillation cavity or a Venturi tube structure and is connected with the rotational flow-air flotation mixer along the tangential direction.
When the backwashing filter is blocked by solid impurities, the backwashing mode is started to discharge the solid impurities from the sewage outlet.
The treatment method of the swirl-air flotation oil-water separation system based on the discharge plasma comprises the following working processes:
the method comprises the following steps: carrying out filtering pretreatment on the wastewater to remove solid impurities in the organic wastewater;
step two: carrying out cyclic advanced oxidation treatment on the pretreated organic wastewater to remove oil in the pretreated organic wastewater until the pretreated organic wastewater reaches a discharge standard;
step three: and discharging the treated wastewater reaching the standard.
The specific implementation mode of the invention is as follows: a back-flushing filter a (2-1) is arranged at an inlet pipeline of a centrifugal pump a (3-1) to primarily filter impurities in wastewater to be treated, the centrifugal pump a (3-1) conveys the wastewater to be treated in a sedimentation tank (1) to a water tank (8), internal circulation begins when the wastewater in the water tank (8) reaches the capacity height, a centrifugal pump b (3-2) extracts the wastewater in the water tank (8) and leads the wastewater into a self-oscillation jet nozzle (10) through a back-flushing filter b (2-2) at a certain pressure, the self-oscillation jet nozzle (10) generates pulse jet under the action of an oscillation chamber and leads the pulse jet to enter a cyclone-air flotation mixer (11) along the tangential direction, gas emitted by an industrial oxygen generator (13) is ionized in an SED plasma generator (15) under the excitation of a power supply (14), and generated base chain reaction initiator gas enters the air flotation-air flotation mixer (11) from the lower part, finally, oil-water separation is carried out in a cyclone separator (12) by utilizing a hydraulic cyclone separation principle, and the air bubbles, the oil and the aggregates of impurities are discharged into a scum barrel (17) through a scum pipe at the upper part of the separator due to low density; is discharged into a water tank (8) through the lower part of the separator for circulation. The overflow valve (5) comprises an overflow valve a (5-1), an overflow valve b (5-2) and an overflow valve c (5-3), wherein the overflow valve a (5-1) and the overflow valve b (5-2) are respectively used for adjusting the inlet pressure of the water tank (8) and the self-oscillation jet nozzle (10), and the overflow valve c (5-3) is used for adjusting the gas inlet pressure of the cyclone-air flotation mixer (11); the pressure sensor (6) comprises a pressure sensor a (6-1), a pressure sensor b (6-2), a pressure sensor c (6-3) and a pressure sensor d (6-4), and is respectively used for monitoring the inlet pressure of the water tank (8), the self-oscillation jet nozzle (10), the SED plasma generating device (15) and the cyclone-air flotation mixer (11); the flow sensor (4) comprises a flow sensor a (4-1) and a flow sensor b (4-2) which are respectively used for monitoring the liquid inlet flow and the gas inlet flow of the cyclone-air flotation mixer (11); signals received by the pressure sensor (6) and the flow sensor (4) are transmitted to an industrial personal computer (19) through a modulator (18); the opening degree of an electric valve a (9-1) and an electric valve b (9-2) is controlled by giving signals to an industrial personal computer (19) so as to control the liquid inlet flow and the gas inlet flow of the cyclone-air flotation mixer (11), and oil-water separation work under different parameters is realized; the sampling valve (7) comprises a sampling valve a (7-1) and a sampling valve b (7-2) which are respectively used for analyzing and detecting the water quality of the initial wastewater to be treated and the water quality after reaction to determine whether the discharge requirement is met.
Claims (6)
1. A cyclone-air flotation oil-water separation system based on discharge plasma is characterized in that: a liquid inlet of the dissolved air pump is connected with the liquid storage tank, and an outlet of the dissolved air pump is connected with the bottom of the rotational flow-air flotation mixer; the gas inlet of the gas dissolving pump is connected with the plasma discharge device, and oxygen active particles generated by the plasma discharge device and wastewater from the liquid storage tank are efficiently mixed and dissolved in the gas dissolving pump; the top of the cyclone-air flotation mixer also comprises a tangential liquid inlet, and the tangential liquid inlet is provided with a cavitation nozzle; and the outlet of the cyclone-air flotation mixer is connected with the cyclone separator.
2. The discharge plasma based cyclone-gas floatation oil-water separation system according to claim 1 is characterized in that: and the outlet of the cyclone separator is connected with the liquid storage tank, so that circulating work is realized.
3. The discharge plasma based cyclone-gas floatation oil-water separation system according to claim 1 is characterized in that: the plasma discharge device comprises discharge tubes and a power supply, wherein the power supply is a high-frequency high-voltage power supply with adjustable voltage peak value and frequency, and the number of the discharge tubes and the discharge power are adjusted according to the concentration of pollutants in wastewater.
4. The discharge plasma based cyclone-gas floatation oil-water separation system according to claim 1 is characterized in that: the cavitation nozzle is a self-oscillation cavity or a Venturi tube structure and is connected with the rotational flow-air flotation mixer along the tangential direction.
5. The discharge plasma based cyclone-gas floatation oil-water separation system according to claim 1 is characterized in that: when the backwashing filter is blocked by solid impurities, the backwashing mode is started, and the solid impurities are discharged from the sewage outlet.
6. The treatment method of the swirl-air flotation oil-water separation system based on the discharge plasma by using the system of any one of claims 1 to 5 is characterized in that:
the method comprises the following steps: carrying out filtering pretreatment on the wastewater to remove solid impurities in the organic wastewater;
step two: carrying out cyclic advanced oxidation treatment on the pretreated organic wastewater, and removing oil in the pretreated organic wastewater until the pretreated organic wastewater reaches a discharge standard;
step three: and discharging the treated wastewater reaching the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338518.5A CN110921942A (en) | 2019-12-23 | 2019-12-23 | Swirl-air flotation oil-water separation system based on discharge plasma |
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| CN201911338518.5A CN110921942A (en) | 2019-12-23 | 2019-12-23 | Swirl-air flotation oil-water separation system based on discharge plasma |
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| CN110921942A true CN110921942A (en) | 2020-03-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113003799A (en) * | 2021-02-23 | 2021-06-22 | 西安恒利石油设备有限公司 | Complex oily sewage treatment system and process |
| CN113750575A (en) * | 2021-08-27 | 2021-12-07 | 北京工业大学 | System based on self-oscillation cyclone type oil-gas separation device and efficacy test method thereof |
| CN114477366A (en) * | 2022-02-23 | 2022-05-13 | 中印恒盛(北京)贸易有限公司 | Method for treating mixed wastewater by using cavitation effect |
| CN114890503A (en) * | 2022-04-15 | 2022-08-12 | 国网湖南省电力有限公司 | Multistage cyclone treatment system for oily wastewater of transformer substation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204643940U (en) * | 2015-03-23 | 2015-09-16 | 深圳科力迩科技有限公司 | Ozone oxidation and air supporting combined system |
| CN105217826A (en) * | 2014-05-29 | 2016-01-06 | 宝山钢铁股份有限公司 | A kind of cold rolling wastewater advanced treatment system and treatment process |
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2019
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217826A (en) * | 2014-05-29 | 2016-01-06 | 宝山钢铁股份有限公司 | A kind of cold rolling wastewater advanced treatment system and treatment process |
| CN204643940U (en) * | 2015-03-23 | 2015-09-16 | 深圳科力迩科技有限公司 | Ozone oxidation and air supporting combined system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113003799A (en) * | 2021-02-23 | 2021-06-22 | 西安恒利石油设备有限公司 | Complex oily sewage treatment system and process |
| CN113750575A (en) * | 2021-08-27 | 2021-12-07 | 北京工业大学 | System based on self-oscillation cyclone type oil-gas separation device and efficacy test method thereof |
| CN113750575B (en) * | 2021-08-27 | 2022-06-10 | 北京工业大学 | System based on self-oscillation cyclone type oil-gas separation device and efficacy test method thereof |
| CN114477366A (en) * | 2022-02-23 | 2022-05-13 | 中印恒盛(北京)贸易有限公司 | Method for treating mixed wastewater by using cavitation effect |
| CN114890503A (en) * | 2022-04-15 | 2022-08-12 | 国网湖南省电力有限公司 | Multistage cyclone treatment system for oily wastewater of transformer substation |
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