CN106430682A - Oil-refining oily wastewater treatment process - Google Patents
Oil-refining oily wastewater treatment process Download PDFInfo
- Publication number
- CN106430682A CN106430682A CN201610936973.5A CN201610936973A CN106430682A CN 106430682 A CN106430682 A CN 106430682A CN 201610936973 A CN201610936973 A CN 201610936973A CN 106430682 A CN106430682 A CN 106430682A
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- China
- Prior art keywords
- oil
- sand
- water
- waste water
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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)
- Physical Water Treatments (AREA)
Abstract
The invention relates to an oil-refining oily wastewater treatment process. The process comprises the following steps: deoiling oily wastewater through an air flotation device to obtain a first oil phase and a first aqueous phase; dehydrating the first oil phase in a centrifuging machine to obtain a second oil phase and a second aqueous phase, and recycling the second oil phase; deeply filtering the first aqueous phase in a fixed bed of a sand filter device, accumulating solid particles and suspended solids in the first aqueous phase on the upper layer of the sand filter device to form a solid matter, and collecting the filtered aqueous phase for uniform treatment; performing band drying on the solid matter and sand on the upper layer of the sand filter device, and merging hot air with delivery of the solid matter and sand to form a particle-shaped solid matter; and separating the particle-shaped solid matter, sand and hot air in a cyclone separator, and collecting the particle-shaped solid matter for uniform treatment. The process realizes separation of water, oil and solid waste in wastewater, has a simple flow, and can be used for reducing cost and energy consumption of wastewater treatment.
Description
Technical field
The invention belongs to the technical field of wastewater treatment, more particularly to a kind of oil refining process for treating oil-containing waste water.
Background technology
Oily waste water is a kind of industrial wastewater having a large capacity and a wide range, from fields such as iron and steel, mechanical and petrochemical industries.With me
The fast development of state's industry, the discharge capacity of oily waste water increases year by year, and composition is also increasingly sophisticated.If oily waste water is directly discharged,
Because the oil film on its top layer hinders oxygen to dissolve in water, so as to cause anoxia in water, biological death, give out a foul smell, severe contamination ring
Border.
The particularly exploitation of oil, refining, the waste water for producing in storage and transport process, such as the condensation separation water of oil gas and oil product,
Washings, reaction generate water, tank car washings, refining equipment washing draining etc..Due to complicated component, great majority refining at present
Oily factory adopts flotation, and adding flocculant carries out separating.Solid fraction after separating still is burnt containing the moisture for having more than 85%
Burn, the substantial amounts of energy is consumed, and secondary pollution may be produced.
Content of the invention
The technical problem to be solved is to provide a kind of oil refining process for treating oil-containing waste water, realize water in waste water,
Oil and the separation of solid waste, flow process is simple, reduces expense and the energy consumption of wastewater treatment.
The technical solution adopted for the present invention to solve the technical problems is to provide a kind of oil refining process for treating oil-containing waste water, bag
Include following steps：
(1) oily waste water is carried out removing oil by air-floating apparatus and the first oil phase and the first water phase is obtained,；
(2) the first oil phase of step (1) gained is carried out dehydration in centrifuge and the second oil phase and the second water phase is obtained, and
Second oil phase is recycled；
(3) first water mutually enters sand filtering device and is fixed an in-depth filtration, the solid particle in the first water phase and
Float piles up to form solid content on the upper strata of sand filtering device, and is mutually collected being uniformly processed to filtering gained water；
(4) solid content on sand filtering device upper strata and sand are carried out belt drying, thermal current and solid content and sand defeated
Cocurrent is sent, forms graininess solid content；
(5) the graininess solid content and sand simultaneously enter cyclone separator to graininess solid content and sand with thermal current
Son carries out separating, and collects graininess solid content and is uniformly processed.
A kind of preferred embodiment as the present invention, the oil content control of step (1) gained water phase is less than
50ppm.
Used as another preferred embodiment of the present invention, the centrifuge in step (2) adopts disk plate centrifuge.
Used as another preferred embodiment of the present invention, second water of step (2) gained is mutually mixed with the first water
Sand filtration process is carried out during contract.
As another preferred embodiment of the present invention, second water of step (2) gained and step (3) sand filtration
Gained water is mutually mixed into and is uniformly processed.
Used as another preferred embodiment of the present invention, in step (4), sand filtering device is set to several, goes forward side by side
The continuous switching of row is used.
Used as the improvement further to above-mentioned embodiment, in step (4), sand filtering device is set to two, two sand
Filter device carries out continuous switching and uses.
Used as another preferred embodiment of the present invention, in step (5), the sand of cyclonic separation gained is carried out back
Receive and recycle.
Beneficial effect
The oily waste water that the present invention is produced for oil refining, most of solid fraction proportion is lighter, and great majority are floating thing, to adopt
With the method for flotation-centrifugation-sand filtration-drying-cyclonic separation, oily waste water is separated into oil, water and solid waste.It was centrifuged
The oily purity height that journey is obtained, can be recycled；Sand filtering device can be carried out to the solid particle in waste water and float
Filter, solid content is through drying and separating, and sand can be reclaimed, and the dry matter content of solid waste reaches more than 90%, body
Product is substantially reduced, and reduces follow-up processing cost；Filter the waste water for producing to unify to be processed, simplify post processing
Process, while avoid the interpolation of chemical reagent.The present invention is processed to oily waste water using the method for physics, flow process letter
Single, process is compact, effectively reduces expense and the energy consumption of wastewater treatment.
Description of the drawings
Fig. 1 is the process chart of the present invention.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limit the scope of the present invention.In addition, it is to be understood that after the content for having read present invention instruction, people in the art
Member can be made various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
A kind of oil refining process for treating oil-containing waste water as shown in Figure 1, comprises the following steps：
(1) oily waste water is carried out removing oil by air-floating apparatus and the first oil phase and the first water phase is obtained, make the first water phase
Oil content controls less than 50ppm.
Still contain part water in (2) first oil phases, therefore the first oil phase is dehydrated using disk plate centrifuge, obtain the
Two oil phases and the second water phase.The purity height of the second oil phase, can be recycled；Second water according to water quality situation, with
One water mutually mixes while the sand filtration for carrying out next step is processed, or is collected into together with the waste water after sand filtration being uniformly processed.
(3) first water mutually enter sand filtering device, carry out in-depth filtration by the fixed bed for being formed by sand, in the first water phase
Solid particle and float pile up to form solid content on the upper strata of sand filtering device, will filter gained water conveying to wastewater treatment
Factory is uniformly processed, simplify the process of post processing, it is to avoid the interpolation of chemical reagent.During sand filtration, sand filtering device
Two are set to, when the height of solid content reach a certain height, second sand filtering device are switched to, reaches continuous operation
Effect.
(4) solid content on sand filtering device upper strata and sand are carried out belt drying, thermal current and solid content and sand defeated
Cocurrent is sent, controls suitable baking temperature, baking temperature is determined by the composition of solid content, and solid content is same be dried
When, form certain graininess.
(5) above-mentioned graininess solid content and sand simultaneously enter cyclone separator with thermal current, using graininess solid
Thing and the density contrast of sand, carry out separating to graininess solid content and sand, and sand is recycled after reclaiming, and collects graininess solid
Thing, the dry matter content of solid waste reaches more than 90%, and volume is substantially reduced, and reduces follow-up processing cost, directly
Deliver to fixed-end forces factory to be uniformly processed.
The oily waste water that the technique is produced for oil refining, most of solid fraction proportion is lighter, and great majority are floating thing, to adopt
With the method for flotation-centrifugation-sand filtration-drying-cyclonic separation, oily waste water is separated into oil, water and solid waste.The technique
Using the method for physics, oily waste water is processed, flow process is simple, and process is compact, effectively reduce wastewater treatment expense and
Energy consumption.
Claims (8)
1. a kind of oil refining process for treating oil-containing waste water, comprises the following steps：
(1) oily waste water is carried out removing oil by air-floating apparatus and obtains the first oil phase and the first water phase；
(2) the first oil phase of step (1) gained is carried out dehydration in centrifuge and obtains the second oil phase and the second water phase, and to
Two oil phases are recycled；
(3) first water mutually enters sand filtering device and is fixed an in-depth filtration, the solid particle in the first water phase and suspension
Thing is piled up to form solid content on the upper strata of sand filtering device, and is mutually collected being uniformly processed to filtering gained water；
(4) solid content on sand filtering device upper strata and sand are carried out belt drying, the conveying of thermal current and solid content and sand is simultaneously
Stream, forms graininess solid content；
(5) the graininess solid content and sand simultaneously enter cyclone separator with thermal current graininess solid content and sand are entered
Row is separated, and is collected graininess solid content and is uniformly processed.
2. one kind according to claim 1 refines oil process for treating oil-containing waste water, it is characterised in that：Step (1) gained
The oil content of the first water phase controls less than 50ppm.
3. one kind according to claim 1 refines oil process for treating oil-containing waste water, it is characterised in that：In step (2)
Centrifuge adopts disk plate centrifuge.
4. one kind according to claim 1 refines oil process for treating oil-containing waste water, it is characterised in that：Step (2) gained
The second water mutually mix with the first water while carrying out sand filtration process.
5. one kind according to claim 1 refines oil process for treating oil-containing waste water, it is characterised in that：Step (2) gained
The second water be mutually mixed into step (3) sand filtration gained water and be uniformly processed.
6. one kind according to claim 1 refines oil process for treating oil-containing waste water, it is characterised in that：Sand in step (4)
Filter device is set to several and carries out continuous switching use.
7. one kind according to claim 6 refines oil process for treating oil-containing waste water, it is characterised in that：Sand in step (4)
Filter device is set to two, and two sand filtering devices carry out continuous switching and use.
8. one kind according to claim 1 refines oil process for treating oil-containing waste water, it is characterised in that：Rotation in step (5)
The separating obtained sand of wind carries out recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610936973.5A CN106430682A (en) | 2016-11-01 | 2016-11-01 | Oil-refining oily wastewater treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610936973.5A CN106430682A (en) | 2016-11-01 | 2016-11-01 | Oil-refining oily wastewater treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106430682A true CN106430682A (en) | 2017-02-22 |
Family
ID=58178409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610936973.5A Pending CN106430682A (en) | 2016-11-01 | 2016-11-01 | Oil-refining oily wastewater treatment process |
Country Status (1)
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| CN (1) | CN106430682A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201424408Y (en) * | 2009-05-19 | 2010-03-17 | 深圳市立雅水务发展有限公司 | Integrated wastewater treatment equipment for oil fields |
| CN102807291A (en) * | 2011-06-02 | 2012-12-05 | 中国科学院生态环境研究中心 | Treatment method and equipment for oilfield produced water |
| CN103480637A (en) * | 2012-06-12 | 2014-01-01 | 安徽厚源正位环保科技有限公司 | Technical method for processing domestic waste |
| CN203419798U (en) * | 2013-07-31 | 2014-02-05 | 庆华集团新疆和丰能源化工有限公司 | Treatment system for treating sewage generated by oil recovery to oil sand |
-
2016
- 2016-11-01 CN CN201610936973.5A patent/CN106430682A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201424408Y (en) * | 2009-05-19 | 2010-03-17 | 深圳市立雅水务发展有限公司 | Integrated wastewater treatment equipment for oil fields |
| CN102807291A (en) * | 2011-06-02 | 2012-12-05 | 中国科学院生态环境研究中心 | Treatment method and equipment for oilfield produced water |
| CN103480637A (en) * | 2012-06-12 | 2014-01-01 | 安徽厚源正位环保科技有限公司 | Technical method for processing domestic waste |
| CN203419798U (en) * | 2013-07-31 | 2014-02-05 | 庆华集团新疆和丰能源化工有限公司 | Treatment system for treating sewage generated by oil recovery to oil sand |
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Application publication date: 20170222 |
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