CN214299548U - Novel oil storage tank area sewage degree of depth oil water separator - Google Patents
Novel oil storage tank area sewage degree of depth oil water separator Download PDFInfo
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- CN214299548U CN214299548U CN202120103558.8U CN202120103558U CN214299548U CN 214299548 U CN214299548 U CN 214299548U CN 202120103558 U CN202120103558 U CN 202120103558U CN 214299548 U CN214299548 U CN 214299548U
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- 239000010865 sewage Substances 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000003860 storage Methods 0.000 title claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 40
- 238000011001 backwashing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 abstract description 16
- 239000007788 liquid Substances 0.000 abstract description 2
- 235000019198 oils Nutrition 0.000 description 113
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- 230000000694 effects Effects 0.000 description 6
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- 230000002209 hydrophobic effect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
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Abstract
The utility model provides a novel deep oil-water separation device for sewage in an oil storage tank area, which comprises a tank area sewage inlet pipeline, a liquid cyclone high-efficiency separator, a deep oil remover, a dirty oil discharge pipeline, a backwashing water inlet pipeline and a drainage pipeline; the tank area sewage inlet pipeline is communicated and connected with a sewage inlet of the hydrocyclone high-efficiency separator through a pipeline; an oil phase outlet of the hydrocyclone high-efficiency separator is connected with a sump oil discharge pipeline through a pipeline, and a water phase outlet of the hydrocyclone high-efficiency separator is connected with a water phase inlet of the deep oil remover through a pipeline; the oil phase outlet of the deep oil remover is connected with a sump oil discharge pipeline through a pipeline, and the water phase outlet of the deep oil remover is connected with a drainage pipeline through a pipeline; the dirty oil discharge pipeline is in conduction connection with the dirty oil tank; the backwashing water inlet pipeline is communicated and connected with the bottom of the deep oil remover; the utility model discloses a high-efficient separation of hydrocyclone + degree of depth deoiling technique can handle oil storage tank district sewage high-efficiently, economically.
Description
Technical Field
The utility model relates to an oil-water separator specifically is a novel oil storage tank district sewage degree of depth oil-water separator.
Background
The oil storage tank area is not only a safety critical part of the refining and chemical enterprises, but also a key point of environmental protection, and the problem of environmental pollution of the oil storage tank area is more and more concerned with the increasing requirements of the public on the environment and the perfection and perfection of national environmental laws and regulations. The drainage of the oil storage tank area belongs to high-oil-content sewage which contains a large amount of scum, emulsion and sodium salt, and has complex components, thus causing pipeline blockage, high COD value and high ammonia nitrogen content. If the water is directly discharged into a sewage treatment field, impact load is brought to normal operation of the sewage treatment field, and oil removal treatment is suitable to be carried out independently. According to the regulation of environmental protection requirements, oily sewage must be treated and discharged after reaching the standard.
At present, the following methods are mainly used for treating sewage generated in a tank field:
firstly, a hydrocyclone method;
the centrifugal separation method belongs to centrifugal sedimentation, and achieves the purpose of separation by utilizing the difference of centrifugal force generated when two phases with different densities and mutually immiscible rotate at high speed in a hydrocyclone. Compared with the traditional separator, the separator has high treatment efficiency, small occupied area and simple structure and can be used in series in single stage and multiple stages. The disadvantage is that the turbulence generated by the high flow rate shears part of the dispersed oil, causing secondary emulsification and thus reducing the separation efficiency. Generally, the method can be used as the most rapid separation equipment and is not suitable for separating oil droplets with the diameter of less than 10 mu m, namely separating emulsified oil.
Secondly, air floatation;
the air flotation method is to make a large number of micro-bubbles adsorbed on oil drops (particles) which are removed in advance; the method utilizes the buoyancy of the gas to bring the pollutants out of the water surface, thereby achieving the purpose of separation. The air micro-bubbles are composed of nonpolar molecules, can be combined with hydrophobic oil, and rise together with oil drops, and the floating speed can be improved by thousands of times, so the oil-water separation effect is very high. The air floatation method can be classified into air-blowing air floatation, pressurized air floatation, electrolytic air floatation and the like according to the difference of the air bubble generation mode. The air-blowing air floatation is to inject air into water by using an air blower, an air compressor and the like, and can also bring air into water by using a water pump water suction pipe and a water ejector. The electrolytic air floatation is to electrolyze water by an electrolytic cell and take pollutants out of the water surface by utilizing the tiny hydrogen and oxygen bubbles formed by electrolysis. The pressurized air flotation is to dissolve air into water under the pressurized condition, then to separate pollutants by using a large amount of released micro-bubbles after the air is recovered to the normal pressure.
The effectiveness of the air flotation process for treating oily wastewater is largely influenced by the addition of chemicals and sometimes plays a decisive role. The efficiency of sewage treatment by the air floatation method can be greatly improved by adopting an air floatation auxiliary agent, a coagulant and the like. At present, the method is widely applied to treatment of oil field wastewater, petrochemical wastewater, food oil production wastewater and the like, but has the disadvantages of large power consumption, complex structure and difficult maintenance.
Thirdly, a gravity settling method;
the gravity settling mechanism is that the oil-water mixture can be automatically separated after a certain time under the action of gravity according to the density difference of oil and water phases. Reasonable hydraulic design and sewage retention time are two important factors influencing oil removal efficiency, and the longer the retention time is, the better the treatment effect is.
Sedimentation separation is carried out in an oil separation tank, and the types of horizontal flow type (API), parallel plate type (PPI), corrugated plate type (CPI) and the like are common. The design of the advection type oil separation tank is mainly based on a Stokes formula, and the minimum oil drop diameter which can be removed by the oil separation tank with a certain surface area can be obtained by the formula. The flow state of the oil separation tank also has great influence on the oil removal capacity and effect, and the best flow state is a laminar flow state which is favorable for rising of oil drops and settling of solid phase. According to the theory, efficient oil separation tanks such as PPI type, CPI type, IPI type (inclined plate type) and the like are further designed.
Compared with the API type, the oil separation tanks of the several types have small occupied area and obviously improved oil removal capacity, so the oil separation tanks are widely applied. The method has simple equipment structure, easy operation and stable oil removal effect, but is not suitable for separating soluble oil or emulsified oil.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel oil storage tank district sewage degree of depth water oil separating device to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a novel deep oil-water separation device for sewage in an oil storage tank area comprises a tank area sewage inlet pipeline, a hydrocyclone high-efficiency separator, a deep oil remover, a sump oil discharge pipeline, a backwashing water inlet pipeline and a drainage pipeline;
the tank area sewage inlet pipeline is communicated and connected with a sewage inlet of the hydrocyclone high-efficiency separator through a pipeline;
an oil phase outlet of the hydrocyclone high-efficiency separator is connected with a sump oil discharge pipeline through a pipeline, and a water phase outlet of the hydrocyclone high-efficiency separator is connected with a water phase inlet of the deep oil remover through a pipeline;
the oil phase outlet of the deep oil remover is connected with a sump oil discharge pipeline through a pipeline, and the water phase outlet of the deep oil remover is connected with a drainage pipeline through a pipeline;
the dirty oil discharge pipeline is in conduction connection with the dirty oil tank;
the backwashing water inlet pipeline is communicated and connected with the bottom of the deep oil remover;
and the drainage pipeline is in conduction connection with the sewage treatment system.
As a further aspect of the present invention: and a sewage pump is arranged on a pipeline between the tank area sewage inlet pipeline and the hydrocyclone high-efficiency separator.
Compared with the prior art, the beneficial effects of the utility model are that:
after the structure is adopted in the utility model, adopt the high-efficient separation of hydrocyclone + degree of depth deoiling technique, can handle oil storage tank district sewage high-efficiently, economically, through this device back, the oil content in the tank district sewage falls below 50mg/L, satisfies follow-up sewage treatment plant's requirement, guarantees follow-up device's long period safety and stability operation. For example, the oil content of the sewage in the tank area of the petrochemical refinery is 5000-10000mg/L, and after the device, the oil content in the sewage in the tank area is reduced to be below 50mg/L, thereby meeting the requirements of a subsequent sewage treatment device.
Most of the oil mixed in the wastewater coexists in several states, and rarely exists in a single state, so that a multi-stage treatment method is adopted, and the oil can reach the discharge standard after being respectively treated in multiple stages. The difficulty of petroleum wastewater treatment varies with the source and the state and composition of the oil stain. The device utilizes the low-intensity centrifugal force field to improve the collision, coalescence, migration and separation processes between oil drops and micro bubbles, and the separation is rapid and efficient.
Drawings
FIG. 1 is a schematic structural diagram of a novel deep oil-water separation device for sewage in an oil storage tank area.
In the figure: 1. a tank field sewage inlet pipeline; 2. a hydrocyclone high-efficiency separator; 3. a deep oil remover; 4. a dirty oil drain line; 5. a backwash water inlet line; 6. a drain line; 7. a sewage pump.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Referring to fig. 1, a novel deep oil-water separation device for sewage in an oil storage tank area comprises a tank area sewage inlet pipeline 1, a hydrocyclone high-efficiency separator 2, a deep oil remover 3, a dirty oil discharge pipeline 4, a backwash water inlet pipeline 5 and a drain pipeline 6; the tank area sewage inlet pipeline 1 is communicated and connected with a sewage inlet of the hydrocyclone high-efficiency separator 2 through a pipeline; an oil phase outlet of the hydrocyclone high-efficiency separator 2 is connected with a sump oil discharge pipeline 4 through a pipeline, and a water phase outlet of the hydrocyclone high-efficiency separator 2 is connected with a water phase inlet of the deep oil remover 3 through a pipeline; an oil phase outlet of the deep oil remover 3 is connected with a sump oil discharge pipeline 4 through a pipeline, and a water phase outlet of the deep oil remover 3 is connected with a drainage pipeline 6 through a pipeline; the dirty oil discharge pipeline 4 is in conduction connection with the dirty oil tank; the backwashing water inlet pipeline 5 is communicated and connected with the bottom of the deep oil remover 3; and the drainage pipeline 6 is in conduction connection with a sewage treatment system.
And a sewage pump 7 is arranged on a pipeline between the tank area sewage inlet pipeline 1 and the hydrocyclone high-efficiency separator 2.
In the present embodiment, the hydrocyclone 2 is divided into a main separation chamber and an auxiliary separation chamber based on particle size classification. Oil and water enter the separator from the bottom of the main separation cavity, form rotating flow motion under the action of the rotating blades, and oil drops with large particle size are quickly separated under the action of rotational flow and are discharged from the upper part of the main separation cavity; and the unseparated oil drops with small grain size enter the auxiliary separation cavity with smaller rotating radius, and the quick separation is realized under the action of larger centrifugal force. When the flow field is low, the rotary flow velocity of the main separation cavity is low, only the distribution effect is achieved, the main separation effect is achieved, and the auxiliary separation cavity can adapt to a large flow fluctuation range, so that the separator is guaranteed to have high separation efficiency on oil drops with large particle sizes and oil drops with small particle sizes and adaptability to inlet working condition changes. The hydrocyclone can rapidly separate and disperse suspended oil and partial emulsified oil, and can realize rapid separation and dispersion of gas, solid and liquid phases by adopting a cyclone centrifugal separation type design, so that the oil removal efficiency reaches more than 90%.
The deep oil remover 3 is mainly in the form of filler and comprises a fiber particle module and hydrophilic and hydrophobic dispersed particles. The core of the fiber particle module technology lies in coalescence, fusion and growth of emulsified oil drops. The larger the oil droplet size, the higher the oil removal efficiency. The oil drops are combined by a physical method, which is most suitable from the economic aspect, namely the coalescence of the oil drops, and the principle is that the oily sewage passes through a filling bed layer formed by solid substances with oleophylic surfaces, so that the fine oil drops in the water are adhered to the surface of the filling bed layer and gradually accumulated to become large oil drops so as to accelerate the separation. Principle of dispersed particle (oil removal) technique: a cavity is arranged in the equipment, and hydrophilic and hydrophobic particles are filled in the cavity. The water phase to be treated enters the coalescence bed layer from the lower part of the filling pipe, solid particles and floccules in the incoming liquid are filtered between the bed layers through the interception of hydrophilic and hydrophobic particles and the action of oil drops, and the oil drops after coalescence growth are collected at the oil pocket above the equipment. The water phase after being cleaned flows out from a lower outlet.
The utility model discloses a theory of operation is:
the sewage in the oil storage tank area firstly enters a hydrocyclone high-efficiency separator 2 through a tank area sewage inlet pipeline 1 and a sewage pump 7 in a pressurizing mode, and the separated oil phase is discharged to a sump oil tank through a top oil phase outlet and a sump oil discharge pipeline 4; the separated water phase enters a deep oil remover 3 for deep separation. The separated oil phase in the deep oil remover 3 is discharged to a sump oil tank from an oil phase outlet and a sump oil discharge pipeline 4; the treated sewage is sent to a subsequent sewage treatment field through a drainage pipeline 6 for further treatment until the discharge requirement is met.
The main process comprises the following steps:
step 1: sewage in the oil storage tank area sequentially enters the hydrocyclone high-efficiency separator 2 through a tank area sewage inlet pipeline 1 and a sewage pump 7;
step 2: the oil phase separated by the hydrocyclone high-efficiency separator 2 is discharged to a sump oil tank through a sump oil discharge pipeline 4;
and step 3: the water phase separated by the hydrocyclone high-efficiency separator 2 enters a deep oil remover 3 for deep separation through a pipeline;
and 4, step 4: the oil phase separated by the deep oil remover 3 is discharged to a sump oil tank through a sump oil discharge pipeline 4;
and 5: the sewage after the separation treatment by the deep oil remover 3 is sent to a subsequent sewage treatment field through a drainage pipeline 6.
Step 6: when the pressure drop of the deep oil remover 3 reaches a certain value, the backwashing water enters the bottom of the deep oil remover 3 from a backwashing water inlet pipeline 5 for backwashing.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (2)
1. A novel deep oil-water separation device for sewage in an oil storage tank area is characterized by comprising a tank area sewage inlet pipeline (1), a hydrocyclone high-efficiency separator (2), a deep oil remover (3), a sump oil discharge pipeline (4), a backwashing water inlet pipeline (5) and a drainage pipeline (6);
the tank area sewage inlet pipeline (1) is communicated and connected with a sewage inlet of the hydrocyclone high-efficiency separator (2) through a pipeline;
an oil phase outlet of the hydrocyclone high-efficiency separator (2) is connected with a sump oil discharge pipeline (4) through a pipeline, and a water phase outlet of the hydrocyclone high-efficiency separator (2) is connected with a water phase inlet of the deep oil remover (3) through a pipeline;
an oil phase outlet of the deep oil remover (3) is connected with a dirty oil discharge pipeline (4) through a pipeline, and a water phase outlet of the deep oil remover (3) is connected with a drainage pipeline (6) through a pipeline;
the dirty oil discharge pipeline (4) is in conduction connection with the dirty oil tank;
the backwashing water inlet pipeline (5) is communicated and connected with the bottom of the deep oil remover (3);
and the drainage pipeline (6) is in conduction connection with the sewage treatment system.
2. The novel deep oil-water separation device for sewage in an oil storage tank area according to claim 1, characterized in that a sewage pump (7) is arranged on a pipeline between the tank area sewage inlet pipeline (1) and the hydrocyclone high-efficiency separator (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120103558.8U CN214299548U (en) | 2021-01-14 | 2021-01-14 | Novel oil storage tank area sewage degree of depth oil water separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120103558.8U CN214299548U (en) | 2021-01-14 | 2021-01-14 | Novel oil storage tank area sewage degree of depth oil water separator |
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| Publication Number | Publication Date |
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| CN214299548U true CN214299548U (en) | 2021-09-28 |
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| CN202120103558.8U Active CN214299548U (en) | 2021-01-14 | 2021-01-14 | Novel oil storage tank area sewage degree of depth oil water separator |
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- 2021-01-14 CN CN202120103558.8U patent/CN214299548U/en active Active
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