CN103755052B - A kind for the treatment of process of oil refining Wastewater by Electric desalination black liquor and system - Google Patents
A kind for the treatment of process of oil refining Wastewater by Electric desalination black liquor and system Download PDFInfo
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- CN103755052B CN103755052B CN201410038386.5A CN201410038386A CN103755052B CN 103755052 B CN103755052 B CN 103755052B CN 201410038386 A CN201410038386 A CN 201410038386A CN 103755052 B CN103755052 B CN 103755052B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 20
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 14
- 238000007670 refining Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000011539 homogenization buffer Substances 0.000 claims abstract description 47
- 239000002699 waste material Substances 0.000 claims abstract description 13
- 238000011033 desalting Methods 0.000 claims description 16
- 238000007667 floating Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 10
- 238000011001 backwashing Methods 0.000 claims description 9
- 238000011109 contamination Methods 0.000 claims description 8
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- 238000007599 discharging Methods 0.000 claims description 4
- 239000002657 fibrous material Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 11
- 238000001914 filtration Methods 0.000 abstract description 9
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- Water Treatment By Electricity Or Magnetism (AREA)
- Water Treatment By Sorption (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind for the treatment of process and system of oil refining Wastewater by Electric desalination black liquor, belong to technical field of chemical, technical scheme is: electricity is taken off black liquor and to be delivered in homogenization buffer tank after settlement treatment, collect oil slick, oily(waste)water is squeezed into strainer by water pump and removes suspended substance to content≤5mg/L; Waste water through filtering is delivered to water-and-oil separator, and in water-and-oil separator, separating oil is to holding tank, the water outlet oil-containing≤10mg/L of water-and-oil separator, and the water outlet of separator is arranged outward by pipeline or delivers to other facilities outward.The inventive method treatment time is short, processing speed fast, non-secondary pollution, safe and effective; Present system structure is simple, processing ease, easy to maintenance, safe and reliable to operation, treatment effect is good, can eliminate secondary pollution.
Description
Technical field
The invention belongs to technical field of chemical, be specifically related to a kind for the treatment of process and system of oil refining Wastewater by Electric desalination black liquor.
Background technology
In recent years, major part oil-field development enters high water-cut stage, along with the enforcement of oil field secondary, tertiary oil recovery technology, the continuous increase of oil field chemical consumption, cause crude oil retrogradation increasingly, become heavy, salts contg raises, emulsion is more serious, and the application of various production technique makes crude oil be plucked out of mainly with the form of milk sap.The a large amount of polymer substances added in Oil extraction process, tensio-active agent, emulsifying agent and other Oil Field Measure liquid enter in crude oil, and cause oil composition complicated, impurity increases, and crude quality declines.After Crude Oil Transportation to refinery first raw material fill with in through sedimentation, enter electric desalting apparatus again by after the materials such as the partial impurities in crude oil, ageing oil, water and crude oil initial gross separation.
General refinery's many employings ultrasonic dehydration technology carries out desalting and dewatering process to crude oil, and some refineries also adopt traditional dosing breakdown of emulsion to process crude oil.In the process, when crude oil tank switching or the poor crude oil of processing quality, the complicated ingredient etc. that complicated ingredient in crude oil is formed as the various chemical agent of fracturing outlet liquid, ageing oil, impurity, oil field interpolation and crude oil effect enters electric desalting apparatus, cause electric desalting apparatus operation irregularity, cut water with electric desalting water filling with electric desalting to discharge, form electric desalting black liquor.This black liquor causes serious harm to downstream wastewater treatment system, can cause the paralysis of Love psychology treatment system time serious.
Also do not have this black liquor of technical finesse reliable and applied widely at present, traditional dosing intermediate processing need research and develop specific or efficient medicament, and processing cost is high, and disengaging time is oversize, and treatment effect is unstable, and the mud produced, sump oil form secondary pollution.The treatment facility being principle with gravity settling or hydrocyclone is to the waste water containing mink cell focus, and particularly density is greater than 0.9 × 10
3kg/m
3mink cell focus water treatment effect extreme difference, disengaging time is long, and practical application difficulty is very large.Also there is not certain refinery of report with the technical finesse electric desalting black liquor filtered.Feeling simply helpless to electric desalting black liquor at present in part refinery, dilutes laggard Sewage treatment systems, cause Sewage treatment systems abnormal with a large amount of middle water.
Summary of the invention
In order to overcome the defect that above-mentioned prior art exists, the object of the present invention is to provide a kind for the treatment of process and system of oil refining Wastewater by Electric desalination black liquor, the method treatment time is short, processing speed fast, non-secondary pollution, safe and effective; This system architecture is simple, processing ease, easy to maintenance, safe and reliable to operation, treatment effect is good, can eliminate secondary pollution.
The present invention is achieved through the following technical solutions:
A treatment process for oil refining Wastewater by Electric desalination black liquor, comprises the following steps:
1) electric desalting black liquor is delivered in homogenization buffer device, settlement treatment is after 1 ~ 2 hour, oil slick floating for liquid upper strata is delivered in floating oil collecting tank, the oily(waste)water of lower floor is pumped in strainer by water pump the suspended particulate content be filtered in waste water and is less than or equal to 5mg/L;
Wherein, during filter operation, also comprise and with clear water or air, strainer being recoiled, obtain the recoil water outlet of Residual contamination thing, this Residual contamination thing is recoiled water outlet by Cemented filling in homogenization buffer device, mud after sedimentation is discharged by homogenization buffer bottom of device, and oily(waste)water then continues to pump in strainer to filter;
2) waste water of removing suspended particulate is delivered in water-and-oil separator, isolates the oil in waste water, obtain oleaginousness and be less than or equal to purifying waste water of 10mg/L.
Also comprise and be collected in storage tank by the oil in isolated waste water, will purify waste water to collect reuse or be delivered to Sewage treatment systems processes.
The pressure of described water pump is set to 0.1 ~ 0.3MPa.
It is pressure difference value according to filter settings that described clear water or air recoil to strainer, is automatically controlled by PLC system.
The filter core that the modified fiber materials that in described strainer, filling has hydrophilic oleophobic property is made.
A treatment system for oil refining Wastewater by Electric desalination black liquor, comprises the homogenization buffer device with oil slick outlet, mud discharging mouth and liquid outlet, strainer and water-and-oil separator; The liquid outlet of homogenization buffer device is connected with the fluid inlet of strainer by pipeline, and the oily(waste)water outlet of strainer is connected with the fluid inlet of water-and-oil separator by pipeline, and water-and-oil separator is also provided with oil outlet and water port; Pipeline between homogenization buffer device and strainer is also provided with water pump; Described strainer is the automatic backwashing filter with PLC control system, and this automatic backwashing filter is connected with homogenization buffer device by drainage pipeline.
The oil outlet of described water-and-oil separator is connected with storage tank by pipeline.
The oil outlet place of described water-and-oil separator arranges automatic oil draining valve.
Described homogenization buffer device is by the external floating oil collecting tank of pipeline.
Described homogenization buffer device adopts perpendicular stream slurry tank, Horizontal sedimentation tank or buffering pond.
Compared with prior art, the present invention has following useful technique effect:
Oil refining Wastewater by Electric desalination black liquor treatment method of the present invention, compared with prior art:
1, disengaging time is short, and velocity of separation is fast, and filtration velocity can reach 3mm/s;
2, flow process is simple, applied widely, is particularly useful for the oily(waste)water containing mink cell focus, any chemical agent is not added in sepn process, therefore do not change oil properties, can realize reclaiming to greatest extent and utilizing, in treating processes, no coupling product or secondary pollution produce;
3, demulsification technology is advanced, and the wetting coalescence principle of employing is directly separated the oil in water emulsion in water outlet with the form of filtering, isolated oil quality is good, precision is high, and water outlet oleaginousness is less than or equal to 10mg/L;
4, the present invention utilizes clear water or air to recoil to this strainer; recoil water outlet Residual contamination thing enters in homogenization buffer device by pipeline again; discharge after sedimentation again, separation; thus the present invention is without the need to arranging equipment such as recoil such as recoil pond and recoil pump etc.; and operationally, need not shut down, just can realize the backflush process to strainer; stable, capacity of resisting impact load is strong.
Further, during water pump operation, pressure is low, and only need 0.1 ~ 0.3Mpa, the filtration resistance of system is little, energy-conservation, effective.
The treatment system of oil refining Wastewater by Electric desalination black liquor of the present invention, comprise the homogenization buffer device, strainer and the water-and-oil separator that are connected successively by pipeline, homogenization buffer device can regulating pondage, can allow in electric desalting black liquor can the material of floating upward quickly simultaneously, as part ageing oil, oil slick etc. float up on the water surface, be isolated out homogenization buffer device by overflow; The oily(waste)water removing oil slick in homogenization buffer device is pumped to strainer by water pump, and the operating pressure of water pump is low, and only need 0.1 ~ 0.3Mpa, the filtration resistance of system is little, energy-conservation; The oily(waste)water entering strainer is removed impurity, suspended substance and small part oily substance, makes suspension content≤5mg/L; Strainer of the present invention is automatic backwashing filter; recoil is controlled automatically by PLC system; when the pressure difference of strainer reaches set(ting)value; utilize clear water or air to recoil to this strainer, recoil water outlet Residual contamination thing enters in homogenization buffer device by pipeline again, discharges after sedimentation again, separation; thus the present invention is without the need to arranging equipment such as recoil such as recoil pond and recoil pump etc.; and operationally, need not shut down, just can realize the backflush process to strainer.Water after filtering enters water-and-oil separator again, sub-argument goes out oil in water emulsion, dispersed oil, makes final outflow water oil-contg≤10mg/L, and this systematic position speed is fast, disengaging time is short, separation accuracy is high, and system footprint area is little, simple to operate, reliable, easy to maintenance, high by this systematic position oil quality out, water content is low.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Wherein: 1 is homogenization buffer device; 2 is strainer; 3 is water-and-oil separator; 4 is storage tank; 5 is water pump; 6 is floating oil collecting tank.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
A treatment process for oil refining Wastewater by Electric desalination black liquor, comprises the following steps:
1) be delivered in homogenization buffer device by electric desalting black liquor, oil slick floating for liquid upper strata, after 1 ~ 2 hour, is delivered in floating oil collecting tank by settlement treatment, and by the oily(waste)water of lower floor, by water pump, (pressure of water pump is set to 0.1 ~ 0.3MPa.) pump in strainer the suspended particulate content be filtered in waste water and be less than or equal to 5mg/L; The filter core of the modified fiber materials manufacture with hydrophilic oleophobic property is filled in described strainer.
Wherein, during filter operation, also comprise and with clear water or air, strainer being recoiled, obtain the recoil water outlet of carrying greasy dirt, the recoil water outlet of this being carried greasy dirt by Cemented filling in homogenization buffer device, mud after sedimentation is discharged by homogenization buffer bottom of device, and oily(waste)water then continues to pump in strainer to filter; State that to recoil to strainer with clear water or air be pressure difference value according to filter settings, automatically controlled by PLC system.
2) waste water of removing suspended particulate is delivered in water-and-oil separator, isolates the oil (comprising suspension oil, dispersed oil and oil in water emulsion) in waste water, obtain oleaginousness and be less than or equal to purifying waste water of 10mg/L.
3) be collected in storage tank by the oil in isolated waste water, will purify waste water to collect reuse or be delivered to Sewage treatment systems processes.
See Fig. 1, oil refining Wastewater by Electric desalination black liquor treatment system of the present invention, comprise with liquid outlet, oil slick outlet and the homogenization buffer device 1 of mud discharging mouth, strainer 2 and water-and-oil separator 3, the liquid outlet of homogenization buffer device 1 is connected by the fluid inlet of pipeline with strainer 2, pipeline between homogenization buffer device 1 and strainer 2 is also provided with water pump 5, oil-containing water in homogenization buffer device 1 squeezes into strainer 2 by water pump 5, the operating pressure of water pump is low, only need 0.1 ~ 0.3Mpa, the filtration resistance of system is little, energy-conservation.The oily(waste)water outlet of strainer 2 is connected by the fluid inlet of pipeline with water-and-oil separator 3, water-and-oil separator 3 is provided with oil outlet and water port; Described strainer 2 is automatic backwashing filter, recoil is controlled automatically by PLC system, when the pressure difference of strainer reaches set(ting)value, clear water or air is utilized to recoil to this strainer, recoil water outlet Residual contamination thing enters in homogenization buffer device by pipeline again, discharges after sedimentation again, separation.And this automatic backwashing filter is connected with homogenization buffer device 1 by drainage pipeline.。
Homogenization buffer device 1 is by the external floating oil collecting tank 6 of pipeline, described homogenization buffer device 1 adopts perpendicular stream slurry tank, Horizontal sedimentation tank or buffering pond, and the size of homogenization buffer device and the position of inlet and outlet pipe lines can according to the size setting particular locations of actual oleaginousness.The oil outlet of described water-and-oil separator 3 is connected with storage tank 4 by pipeline, and arranges automatic oil draining valve at the oil outlet place of water-and-oil separator 3.
Oil refining Wastewater by Electric desalination black liquor treatment system of the present invention, in use:
Electric desalting black liquor is collected into homogenization buffer device by pipeline, hydraulic detention time 1 ~ 2 hour in homogenization buffer device, the effect of homogenization buffer device has 2: one to be the regulating water quality water yield, two is to allow in black liquor material such as part ageing oil, the oil slick etc. of floating upward quickly to float up on the water surface, be isolated by overflow and send homogenization buffer device, send into refinery's effluent oil treatment system or telegram in reply desalter.The clear liquid of homogenization buffer device is connected to water pump by pipeline in the middle part of tank body, strainer is squeezed into by pump, remove impurity, suspended substance and small part oily substance, make suspension content≤5mg/L, water after filtering enters water-and-oil separator, be separated oil in water emulsion, dispersed oil decolouring to black liquor, make final outflow water oil-contg≤10mg/L, the discharge water after process enters Sewage treatment systems again and carries out biochemical treatment.
Strainer of the present invention is automatic backwashing filter, when this strainer Inlet and outlet water pressure reduction reaches set(ting)value, system opens backwashing procedures automatically, recoil water outlet Residual contamination thing enters homogenization buffer device bottom by homogenization buffer device middle and lower part pipeline, precipitate and separate again in snubber assembly, the mud discharging mouth with bottom of device of interruption is discharged.The material that water-and-oil separator is separated enters storage tank by the oil discharge outlet at its top, regularly sends into stock oil system.
Illustrate in conjunction with example:
Certain petrochemical plant electric desalting black liquor, oil-contg >10000mg/L.First electric desalting black liquor enters in tank by the pipeline of homogenization buffer tank middle and upper part, stops 1 hour, makes oleaginousness drop to 3000mg/L.Homogenization buffer tank adopts perpendicular stream slurry tank, also can be other gravity settling facilities such as horizontal tank, buffering pond.
Water outlet enters water pump by the pipeline in the middle part of surge tank, and hydraulic pressure 0.1 ~ 0.3MPa, squeezes into strainer by water, removes the suspended substance in water, uses water suspension content and be less than 5mg/L.When filter differential pressures reaches (set(ting)value), with the clear water after filtering, strainer is recoiled, recoil and to be undertaken by PLC automatic control.Recoil water outlet enters surge tank middle and lower part by pipeline.The waste water removing suspended substance through filter enters water-and-oil separator by connecting tube again, and be separated suspension oil, dispersed oil and oil in water emulsion in water outlet, water outlet oil-containing is less than 10mg/L.Isolated oil is collected into floating oil collecting tank by the automatic oil draining valve at separator top, regularly transports outward.Water after purification enters sewage treatment plant or reuse.
For a person skilled in the art, according to technical scheme described above, other various corresponding change and distortion can be made, and all these change and distortion all should belong within this scope being suitable for the protection of novel claim.
Claims (2)
1. a treatment process for oil refining Wastewater by Electric desalination black liquor, is characterized in that, be made up of following steps:
1) electric desalting black liquor is delivered in homogenization buffer device, settlement treatment is after 1 ~ 2 hour, oil slick floating for liquid upper strata is delivered in floating oil collecting tank, the oily(waste)water of lower floor is pumped in strainer by water pump the suspended particulate content be filtered in waste water and is less than or equal to 5mg/L; The pressure of described water pump is set to 0.1 ~ 0.3MPa;
Wherein, during filter operation, with clear water or air, strainer is recoiled, obtain the recoil water outlet of Residual contamination thing, this Residual contamination thing is recoiled water outlet by Cemented filling in homogenization buffer device, mud after sedimentation is discharged by homogenization buffer bottom of device, and oily(waste)water then continues to pump in strainer to filter; The filter core that the modified fiber materials that in described strainer, filling has hydrophilic oleophobic property is made;
It is pressure difference value according to filter settings that described clear water or air recoil to strainer, is automatically controlled by PLC system;
2) waste water of removing suspended particulate is delivered in water-and-oil separator, isolates the oil in waste water, obtain oleaginousness and be less than or equal to purifying waste water of 10mg/L;
3) be collected in storage tank by the oil in isolated waste water, will purify waste water to collect reuse or be delivered to Sewage treatment systems processes.
2. a treatment system for oil refining Wastewater by Electric desalination black liquor, is characterized in that, comprises the homogenization buffer device (1) with oil slick outlet, mud discharging mouth and liquid outlet, strainer (2) and water-and-oil separator (3); Homogenization buffer device (1) adopts perpendicular stream slurry tank, Horizontal sedimentation tank or buffering pond; The liquid outlet of homogenization buffer device (1) is connected by the fluid inlet of pipeline with strainer (2), the oily(waste)water outlet of strainer (2) is connected by the fluid inlet of pipeline with water-and-oil separator (3), (3) are also provided with oil outlet and water port with water-and-oil separator, arrange automatic oil draining valve at the oil outlet place of water-and-oil separator (3), the oil outlet of water-and-oil separator (3) is connected with storage tank (4) by pipeline; Pipeline between homogenization buffer device (1) and strainer (2) is also provided with water pump (5), homogenization buffer device (1) is by the external floating oil collecting tank (6) of pipeline; Described strainer (2) is the automatic backwashing filter with PLC control system, and this automatic backwashing filter is connected with homogenization buffer device (1) by drainage pipeline, the filter core that the modified fiber materials that in strainer (2), filling has hydrophilic oleophobic property is made.
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| CN105174553A (en) * | 2015-10-13 | 2015-12-23 | 波鹰(厦门)科技有限公司 | Recycle device and method for oil in oil producing wastewater |
| CN106281410A (en) * | 2016-10-17 | 2017-01-04 | 广汉市思科信达科技有限公司 | A kind of ultrasonic dehydration desalting and dewatering pipeline |
| CN107827264A (en) * | 2017-12-05 | 2018-03-23 | 上海蓝科石化环保科技股份有限公司 | A kind of sewage purification processing system and method |
| CN108117179A (en) * | 2017-12-21 | 2018-06-05 | 新兴能源科技有限公司 | It is a kind of to be applied to the cleaning system of MTO device water systems and purification technique |
| CN109745736A (en) * | 2018-06-05 | 2019-05-14 | 金昌中枨科技有限责任公司 | A kind of method of high-yield and high-efficiency copper mesh film process oily wastewater |
| CN110857583A (en) * | 2018-08-22 | 2020-03-03 | 中国石油化工股份有限公司 | Gathering and transporting method for clean sewage and shunt refined sewage |
| CN110985317A (en) * | 2019-12-20 | 2020-04-10 | 陈烨 | Geothermal power generation device based on acid dew point |
| CN111196620B (en) * | 2020-01-20 | 2022-04-22 | 重庆科技学院 | Oil-water separation device and method for treating wastewater in metallurgical industrial process |
| CN111362438A (en) * | 2020-03-18 | 2020-07-03 | 北京大井易通科技发展有限公司 | Electro-desalting wastewater oil removal treatment system and process |
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| US20080029459A1 (en) * | 2006-08-04 | 2008-02-07 | Sharp Kabushiki Kaisha | Water treatment Method and water treatment equipment |
| CN201240886Y (en) * | 2008-08-18 | 2009-05-20 | 曾金华 | Full-automatic |
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