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CN104649563B - A kind of advanced treatment process of sludge containing oil - Google Patents

A kind of advanced treatment process of sludge containing oil Download PDF

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Publication number
CN104649563B
CN104649563B CN201310496015.7A CN201310496015A CN104649563B CN 104649563 B CN104649563 B CN 104649563B CN 201310496015 A CN201310496015 A CN 201310496015A CN 104649563 B CN104649563 B CN 104649563B
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Prior art keywords
sludge
oil
tank
acid
sewage
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CN104649563A (en
Inventor
杨飞飞
回军
李宝忠
吴巍
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China Petroleum and Chemical Corp
Sinopec Fushun Research Institute of Petroleum and Petrochemicals
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China Petroleum and Chemical Corp
Sinopec Fushun Research Institute of Petroleum and Petrochemicals
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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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • 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
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10—Feedstock materials
    • C10G2300/1003—Waste materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Analytical Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a kind of advanced treatment process of sludge containing oil, including following content: the oily sludge in storage sludge-tank enters in mud mixing channel, add demulsifier, carry out breakdown of emulsion process, oily sludge after breakdown of emulsion enters Stacked sludge dewatering machine and carries out solid-liquid separation, obtain filtrate and mud cake, filtrate enters biphase cyclone and separates, by the lower floor's residual sludge reflux in cyclone to storage sludge-tank after two-phase laminated flow, upper strata mixed liquor is sent into gas-liquid mixed tank and is mixed with air, subsequently into separate tank, sump oil is separated with Preliminary sewage, sump oil utilizes Slag Scraping Device to be recycled to slop tank, sewage enters filter, particle in sewage and residue sump oil are separated from water, by isolated for filter top oil recovery to oil skimming tank, the sewage that filter is discharged is sent into sewage treatment plant and is carried out subsequent treatment.The moisture content of oily sludge can be reduced to about 50% from 80%～98% by present invention process, it is also possible to reclaims the most of crude oil in oily sludge, is substantially reduced the difficulty of mud subsequent treatment.Present invention process applied range, is particularly well-suited to be applied to the process of tank bottom oil sludge, scum silica frost and activated sludge, and the process of the various oily sludges of oil exploitation and the generation of storing enterprise.

Description

A kind of advanced treatment process of sludge containing oil
Technical field
The present invention relates to a kind of advanced treatment process of sludge containing oil, particularly relate to the sludge dewatering of a kind of oily sludge, former The process technique of recovery of oil.
Background technology
Oil exploitation, collect defeated, refining and oily waste water treatment during can produce the black solid of a large amount of oil-containing, half Solid waste, is referred to as greasy filth, and its main component is crude oil, Ni Heshui.In greasy filth, solid particle size can be micro-from deficiency Rice to several inches, great majority are between l to 100 micron, and crude oil kind, oil plant structure and operation bar are depended in oil composition Part, the composition of mud may change over and change.According to statistics, nearly 3,000,000 tons of Chinese festiva oil-producing mud, the crude oil wherein contained Resource is about about 600,000 tons.In greasy filth in addition to containing substantial amounts of aged crude oil, waxiness, colloidal substance, containing a large amount of benzene homologues, The poisonous and harmful substances such as phenols, anthracene, pyrene, Polychlorinated biphenyls and dioxin.In addition possibly together with substantial amounts of pathogen, parasitism in greasy filth Worm, if do not carried out the most effective process, not only can waste petroleum resources, also environment can be caused severe contamination.
The technology processing oily sludge at present is varied, and every kind of method has respective pluses and minuses and the scope of application.As Most petroleum resources in solvent extraction recoverable oil sludge, but to there is long flow path, complex process, processing cost high simultaneously Shortcoming；Biological treatment non-secondary pollution, but long processing period；Chemical demulsification method need to separately add demulsifier to the greasy filth that emulsifying is serious And heating, same crude Treatment is more difficult；Solid-liquid isolation method is low for the response rate containing innage, with serious pollution greasy filth；Burn Method can reduce the harmful substance pollution to environment in mud, but flow process is complicated, and cost and operating cost are high, it is impossible to reclaim crude oil, And burn the SO produced2, CO and dust air can be produced secondary pollution.Along with the increasingly stringent of environmental regulation and perfect, subtract Quantization, resource and harmless treatment greasy filth technology, will become the inexorable trend of contained Mud Treatment Technology development.
CN102039301A discloses a kind of oily sludge resource, Harmless and Comprehensive Disposal technique.Breaking used by wherein Emulsion is two or more mixture in sodium carbonate, sodium sulfate, dodecyl sodium sulfate, polyoxyethylene lauryl ether, Oil recovery rate is up to 75%～90%.This technical process is complex, and oil recovery rate needs to improve.CN102092907A is open A kind of method of oily sludge recycling treatment, first passes through electrochemical method and sloughs rich in emulsified water in mud, make sewage Reaching re-injection requirement, rear oily sludge treated by the present method is aqueous is down to less than 1%, a large amount of aging former in reclaiming oily sludge Oil, aging sump oil contained by rear oily sludge treated by the present method is down to less than 1%, finally by oily sludge organic-treating, through micro- After biofermentations etc. process, oily sludge organises, and reaches harmless discharge, and last sump oil content is less than 3%, but this technique is grasped Making complexity, cost is high, is unfavorable for actual application.CN102041038A discloses a kind of method for treating ageing oil of viscous oil, the method By using demulsifier to combine centrifugal method treatment of aged oil, solve a difficult problem for oil-field thick-oil ageing oil breaking emulsion and dewatering, but The cost being the Three-phase decanter centrifuge used in this invention is high, the treatment effect ratio of the impurity light to foam geometric ratio water in sewage Poor, it is unfavorable for the Treatment of Sludge that oil content is high.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of advanced treatment process of sludge containing oil.This work Skill is possible not only to be effectively realized the oil of oily sludge, water, mud three phase separation and process, the big portion in the most recyclable oily sludge Divide crude oil, it is substantially reduced the difficulty of mud subsequent treatment.
Advanced treatment process of sludge containing oil of the present invention, including following content: the oily sludge in storage sludge-tank enters Entering in mud mixing channel, add demulsifier, carry out breakdown of emulsion process, the oily sludge after breakdown of emulsion enters Stacked sludge dewatering machine and enters Row solid-liquid separation, obtains filtrate and mud cake, and filtrate enters biphase cyclone and separates, by under in cyclone after two-phase laminated flow Layer residual sludge reflux is to storage sludge-tank, and upper strata mixed liquor is sent into gas-liquid mixed tank and mixed with air, subsequently into dividing From pond, being separated with Preliminary sewage by sump oil, sump oil utilizes Slag Scraping Device to be recycled to slop tank, and sewage enters filter, by sewage Particle and residue sump oil be separated from water, by isolated for filter top oil recovery to oil skimming tank, filter The sewage discharged is sent into sewage treatment plant and is carried out subsequent treatment.
Demulsifier described in present invention process, includes by weight percentage: fatty alcohol-polyoxyethylene ether sulfosuccinic Acid monoester disodium 5wt%～20wt%, lauryl alcohol phosphate ester potassium 3wt%～18wt%, styrene 0.5wt%～2wt%, acid 0.5wt%～3wt%, water 57wt%～91wt%.
Wherein, the structural formula of described fatty alcohol-polyoxyethylene ether sulfosuccinic acid monoesters disodium (MES) is RO (CH2CH2O)3COCH2CH(SO3Na) COONa, wherein R=C12～C18.The chemistry of described lauryl alcohol phosphate ester potassium (MAEPK) Structural formula is RO (CH2CH2O)n-PO(OK)2, wherein R=C12～C18, n=3 or 9.Described acid is mineral acid or C1～C6's One or more in organic acid, one or more during wherein mineral acid is sulphuric acid, hydrochloric acid or nitric acid, organic acid be formic acid, One or more in acetic acid, propanoic acid, phenol or oxalic acid.
In present invention process, the preparation method of described oily sludge demulsifier, including following content: by fatty alcohol polyoxy Vinyl Ether sulfosuccinic acid monoesters disodium, lauryl alcohol phosphate ester potassium, styrene, acid and water mix homogeneously, obtain greasy filth breakdown of emulsion Agent.Above-mentioned raw materials can also be added separately to mix homogeneously in oily sludge in use.The preparation process of demulsifier is all often Carry out under normal temperature and pressure.Demulsifier incorporation time in mud mixing channel is 20～40 minutes, and mixing channel temperature controls 50～70 ℃。
In present invention process, described demulsifier can also add corrosion inhibiter as required, such as type oxide film corrosion inhibiter, sinks One or more in integrated membrane type corrosion inhibiter or adsorbed film type corrosion inhibiter, the addition of corrosion inhibiter according to actual needs, typically constitutes from The 0.1%～1% of greasy filth demulsifier weight.
In present invention process, demulsifier is put into mud mixing channel by dosing pump by medicine dissolving and adding system and carries out breakdown of emulsion Process.
In present invention process, the oily sludge after breakdown of emulsion processes enters Stacked sludge dewatering machine by the way of drain, After extruding, filtrate and mud cake is formed in dewaterer.
In present invention process, mud cake is transported by conveying worm, can select landfill, extraction heat, be pyrolyzed, burn, heap The techniques such as fertilizer or mummification process；Filtrate main component is water, oil, residue mud and the impurity lighter than water, and filtrate is through biphase Oarse-grained suspended solid in cyclone solid-liquid separation, i.e. mixed liquor and liquid phase separation, upper strata oil water mixture enters gas-liquid Blending tank, utilizes the aerator bottom blending tank to introduce air and forms microbubble, make microbubble be sufficiently mixed with filtrate, formed Mixture, enters separate tank.
In present invention process, it is as follows that the mixture formed in gas-liquid mixed tank enters into separation process in separate tank: mixing Thing utilizes microbubble to adsorb in separate tank and carries oil and float in water and floats up to liquid level formation scum silica frost, utilizes Slag Scraping Device to return Receiving and utilize, separate tank lower floor sewage is sent into filter and is continued with, the sewage filtering layer by filter, the particle in water and Sump oil is intercepted step by step by filtering layer, thus reaches to separate with water.By isolated for top oil recovery to oil skimming tank, filter The sewage that device is discharged is sent into sewage treatment plant and is carried out subsequent treatment.
In present invention process, described Stacked sludge dewatering machine is made up of sludge condensation and sludge dewatering two parts.? Under action of gravity, water leaches from the lamination gap of relative movement, it is achieved rapid concentration.Through mud concentration along with dewaterer The rotation of middle helical axis is constantly moved along, and under the effect of the pressure, the moisture in mud is squeezed discharge, and mud cake solid content is not Disconnected rising, finally realizes the continuous dehydration of mud.
In present invention process, described separate tank is provided with flap shape slag-guiding plate device；Flap shape slag-guiding plate is oblique by front portion Plate, front straight plate, middle part swash plate, the straight plate in rear portion and rear portion swash plate composition, wherein the straight plate in middle part and the straight plate level in rear portion are placed, front Portion's swash plate is less than front straight plate, and middle part swash plate is less than front straight plate, and the straight plate in rear portion is less than middle part swash plate, and rear portion swash plate is higher than rear portion Straight plate；After scum board contacts with anterior swash plate, during the scum silica frost on entrance front straight plate can all move through along with scum board After the straight plate of portion's swash plate and rear portion, overflow from rear portion swash plate, enter in recycling can.
In present invention process, described gas-liquid mixed tank belongs to sealing device, is provided with exhaustor bottom cover plate, can discharge gas The harmful gas of release in liquid mixed process, prevents from polluting working environment.
Technical process of the present invention is carried out under automaton control.
Carry out the most at normal temperatures and pressures outside technical process scrubbing mud mixing channel of the present invention.
Present invention process feature is as follows:
1, demulsifier of the present invention uses fatty alcohol-polyoxyethylene ether monomester succinate disodium and lauryl alcohol phosphate ester potassium Compounding, then mate-assist styrene and acid, demulsification is good；Fatty alcohol-polyoxyethylene ether monomester succinate disodium and lauryl alcohol Phosphate ester potassium biological degradability is good, and the impact on environment is little, environmental protection；The production cost of demulsifier of the present invention is low, preparation side Method is easy, applied widely, it is easy to commercial Application.
2, the separate tank described in present invention process is provided with on flap shape slag-guiding plate device, flap shape slag-guiding plate and Slag Scraping Device It is big that what scum board contact was formed scrapes slag region area, uses this flap shape slag-guiding plate device, not only scrapes slag easily, thoroughly, and And scum silica frost is difficult to reflux bottom scum board, it is ensured that the water quality of water outlet, also improve the response rate of sump oil.
3, the Stacked sludge dewatering machine that present invention process uses, dehydrating effect is good, and low cost is easy to maintenance, and it There is self-cleaning function, blockage problem will not occur, only need a small amount of water to rinse, without secondarily polluted water, meet environmental protection concept requirement.
4, present invention process is good to the dehydrating effect of oily sludge, can moisture content 80～98% sludge dewatering to aqueous Rate is about 50%, can waste oil recovery to greatest extent, greatly reduce mud and the difficulty of sewage subsequent treatment, mud is deviate from Sewage also obtain advanced treating.
5, the technique applied range of the present invention, it is possible to be applicable to municipal wastewater, food, beverage, chemical industry, leather, wlding, The Treatment of Sludge of the industries such as papermaking, printing and dyeing, pharmacy, is particularly well-suited to be applied to the process of tank bottom oil sludge, scum silica frost and activated sludge, And the process of the various oily sludges of oil exploitation and the generation of storing enterprise, meet environmental protection concept.
6, automation technolo degree of the present invention is high, process program is advanced, easy and simple to handle, operating cost is low, can have Realize recycling sludge, innoxious, the process requirement of minimizing to effect, meet environmental protection concept.
Accompanying drawing explanation
Fig. 1 is the advanced treatment process of sludge containing oil schematic flow sheet of the present invention.
Wherein, 1-storage sludge-tank, 2-sludge pump, 3-mud mixing channel, 4-dosing pump, 5-medicine dissolving and adding system, 6-Stacked sludge dewatering machine, 7-filtrate, the biphase cyclone of 8-, 9-mud cake, 10-sludge dispoal device, 11-gas-liquid mixed Tank, 12-separate tank, 13-scum silica frost, 14-oil skimming tank, 15-sewage, 16-filter, 17-sewage treatment plant, 18-remains dirt Mud.
Fig. 2 be the present invention oil-containing sludge recycling process in the structural representation of separate tank slag-guiding plate.
Wherein, 1-front portion swash plate, 2-front straight plate, swash plate in the middle part of 3-, the straight plate in 4-rear portion, 5-rear portion swash plate, 6-separate tank Cell body.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but is not so limited the present invention.Involved by wherein Percentage composition is on the basis of weight.Carry out the most at normal temperatures and pressures outside technical process scrubbing mud mixing channel of the present invention.
The present invention is realized by following technical process: first the mud in storage sludge-tank 1 is passed through mud Pump 2 pumps in mud mixing channel 3, uniform stirring mud.Aqueous demulsifier is put into by medicine dissolving and adding system 5 by dosing pump 4 Mud mixing channel 3 carries out mud breakdown of emulsion process.Mud after breakdown of emulsion processes enters Stacked sludge dewatering machine 6 by drain. Dewaterer 6 is provided with sludge condensation and sludge dewatering two parts device.Under gravity, water is from the lamination gap of relative movement Leach, it is achieved rapid concentration.The mud that process concentrates constantly is moved along along with the rotation of helical axis, under the effect of the pressure, Moisture in mud is squeezed discharge, and mud solid content constantly raises, and finally realizes the continuous dehydration of mud.Moisture in mud Being squeezed in dewaterer after discharging and form filtrate 7, mud forms mud cake 9 after continuously extruded dehydration.Shape after processed The mud cake 9 become is transported by conveying worm, can select landfill, extraction heat, be pyrolyzed, burns, after the mud such as compost or mummification Processing means 10 carries out subsequent treatment to it.It is water, oil, residue mud and ratio from the main component of dewaterer 6 filtrate 7 out The impurity that water is light, pumps into this mixed liquor in biphase cyclone 8 and carries out solid-liquid separation.Bottom in cyclone 8 after solid-liquid separation Excess sludge 18 returns storage sludge-tank and processes, and upper strata mixed liquor is sent in gas-liquid mixed tank 11 the most mixed with air After conjunction, gas-liquid mixture is passed through separate tank 12 and carries out solid, liquid, gas three phase separation.Gas-liquid mixture utilizes micro-in separate tank Bubble absorption and carry in water oil and float floats up to liquid level and forms scum silica frost 13.Separate tank 12 isolated scum silica frost 13 utilizes and scrapes Slag machine is recycled to oil skimming tank 14, and the sewage 15 of separate tank 12 lower floor is sent into filter 16 and processed, filter top part The oil recovery separated out is to oil skimming tank 14, and the sewage that filter is discharged is sent into sewage treatment plant 17 and carried out subsequent treatment.
Embodiment 1
The specific embodiment of the invention is described as a example by certain refinery's tank bottom oil sludge.The oily sludge content analysis of charging is shown in Table 1, The each weight percentages of components of demulsifier is: fatty alcohol-polyoxyethylene ether sulfosuccinic acid monoesters disodium (R=C18) 18wt%, lauryl alcohol Ether phosphate potassium (chemical formula: RO (CH2CH2O)n-PO(OK)2, R=C14, n=9) and 15wt%, styrene 1wt%, oxalic acid 0.6wt%, water 65.4wt%.Demulsifier dosage is the 3% of greasy filth weight.Demulsifier incorporation time in mud mixing channel is 30 minutes, mixing Bath temperature degree controls at about 65 DEG C.Process oily sludge with present invention process, the moisture content of discharging mud cake reduce to 50.3%～ 53.8%, oil content is 17.0%～21.4%, as shown in table 2.By mass balance, mud volume after processed at least drops Low 10 times, greatly reduce the difficulty of mud subsequent treatment.COD (COD) in filtrate and float (SS) content As shown in table 3, the difficulty of later stage sewage disposal is it reduced.Tank bottom oil sludge is processed by present invention process, finally divides Being recycled to oil skimming tank from the isolated scum silica frost in pond and filter top, the sewage that filter is discharged is sent into sewage treatment plant and is entered Row subsequent treatment.According to charging-1 calculating, final oil recovery rate is the oil content/charging of 98.9%(oil recovery rate=recycling Oil content × 100% of greasy filth).
Table 1 oily sludge content analysis table.
Table 2 oily sludge dewatered cake content analysis table.
Table 3 oily sludge dehydration filtrate content analysis table.
Comparative example 1
Selected greasy filth composition is with charging-1 of embodiment 1, and selected process technique is with embodiment 1.
According to the 3% of greasy filth weight, medicine dissolving and adding system adds polyether type demulsifying agent SP169 in mud mixing channel.Pass through After the PROCESS FOR TREATMENT of embodiment 1, separate tank and filter top isolated scum silica frost oil recovery are to oil skimming tank, filter The sewage discharged is sent into sewage treatment plant and is carried out subsequent treatment.Final oil recovery rate is 77.8%.
Comparative example 2
Selected greasy filth composition is with the charging-1 of embodiment 1.
According to the 3% of greasy filth weight, aqueous demulsifier (with embodiment 1) is put into by medicine dissolving and adding system by dosing pump Store in the mud mixing channel of greasy filth and carry out greasy filth breakdown of emulsion process.Greasy filth after being processed by breakdown of emulsion pumps in settling tank and is incubated Settle 8 hours, the greasy filth after sedimentation is passed through in three-phase centrifuge and carries out three phase separation process.Final oil recovery rate is 86.8%.
Comparative example 3
Selected greasy filth composition is with charging-1 of embodiment 1, and selected process technique is with embodiment 1.
According to the 3% of greasy filth weight, medicine dissolving and adding system adds demulsifier A: aliphatic alcohol polyethenoxy in mud mixing channel Ether sulfosuccinic acid monoester disodium (R=C18) 25wt%, styrene 1wt%, oxalic acid 0.6wt%, water 73.4wt%.Through embodiment 1 After PROCESS FOR TREATMENT, separate tank and filter top isolated scum silica frost oil recovery are to oil skimming tank, the dirt that filter is discharged Water is sent into sewage treatment plant and is carried out subsequent treatment.Final oil recovery rate is 75.4%.
Comparative example 4
Selected greasy filth composition is with charging-1 of embodiment 1, and selected process technique is with embodiment 1.
According to the 3% of greasy filth weight, medicine dissolving and adding system adds demulsifier B: lauryl alcohol phosphate ester in mud mixing channel Potassium (R=C14, n=9) and 25wt%, styrene 1wt%, oxalic acid 0.6wt%, water 73.4wt%.After the PROCESS FOR TREATMENT of embodiment 1, point From pond and filter top isolated scum silica frost oil recovery to oil skimming tank, the sewage that filter is discharged sends into sewage disposal Factory carries out subsequent treatment.Final oil recovery rate is 62.3%.

Claims (10)

1. an advanced treatment process of sludge containing oil, it is characterised in that include following content: the oil-containing in storage sludge-tank Mud enters in mud mixing channel, adds demulsifier, carries out breakdown of emulsion process, and the oily sludge after breakdown of emulsion enters folded spiral shell formula mud and takes off Water machine carries out solid-liquid separation, obtains filtrate and mud cake, and filtrate enters biphase cyclone and separates, by cyclone after two-phase laminated flow In lower floor's residual sludge reflux to storage sludge-tank, upper strata mixed liquor is sent into gas-liquid mixed tank and is mixed with air, then Entering separate tank, separated with Preliminary sewage by sump oil, sump oil utilizes Slag Scraping Device to be recycled to slop tank, and sewage enters filter, will Particle in sewage and residue sump oil are separated from water, by isolated for filter top oil recovery to oil skimming tank, The sewage that filter is discharged is sent into sewage treatment plant and is carried out subsequent treatment；Described demulsifier includes by weight percentage: fat Fat polyoxyethylenated alcohol sulfosuccinic acid monoesters disodium 5wt%～20wt%, lauryl alcohol phosphate ester potassium 3wt%～18wt%, benzene second Alkene 0.5wt%～2wt%, acid 0.5wt%～3wt%, water 57wt%～91wt%.
2. according to the technique described in claim 1, it is characterised in that: demulsifier incorporation time in mud mixing channel is 20～40 Minute, mixing channel temperature controls at 50～70 DEG C.
3. according to the technique described in claim 1, it is characterised in that: described fatty alcohol-polyoxyethylene ether sulfosuccinic acid monoesters The structural formula of disodium is RO (CH2CH2O)3COCH2CH(SO3Na) COONa, wherein R=C12～C18。
4. according to the technique described in claim 1, it is characterised in that: the chemical structural formula of described lauryl alcohol phosphate ester potassium is RO(CH2CH2O)n-PO(OK)2, wherein R=C12～C18, n=3 or 9.
5. according to the technique described in claim 1, it is characterised in that: described acid is mineral acid or C1～C6Organic acid in One or more, one or more during wherein mineral acid is sulphuric acid, hydrochloric acid or nitric acid, organic acid be formic acid, acetic acid, third One or more in acid, phenol or oxalic acid.
6. according to the technique described in claim 1, it is characterised in that: the preparation method of demulsifier is as follows: by fatty alcohol polyoxy second Alkene ether sulfosuccinic acid monoester disodium, lauryl alcohol phosphate ester potassium, styrene, acid and water mix homogeneously, obtain greasy filth demulsifier.
7. according to the technique described in claim 1, it is characterised in that: the oily sludge after breakdown of emulsion processes enters by the way of drain Enter Stacked sludge dewatering machine, dewaterer is formed after extruding filtrate and mud cake.
8. according to the technique described in claim 1, it is characterised in that: filtrate is through biphase cyclone solid-liquid separation, i.e. mixed liquor In oarse-grained suspended solid and liquid phase separation, upper strata oil water mixture enter gas-liquid mixed tank, utilize bottom blending tank Aerator introduces air and forms microbubble, makes microbubble be sufficiently mixed with filtrate.
9. according to the technique described in claim 1, it is characterised in that: described separate tank is provided with flap shape slag-guiding plate；Flap shape Slag-guiding plate is made up of anterior swash plate, front straight plate, middle part swash plate, the straight plate in rear portion and rear portion swash plate, wherein the straight plate in middle part and after The straight plate level in portion is placed, and anterior swash plate is less than front straight plate less than front straight plate, middle part swash plate, and the straight plate in rear portion is oblique less than middle part Plate, rear portion swash plate is higher than the straight plate in rear portion.
10. according to the technique described in claim 1, it is characterised in that: described gas-liquid mixed tank belongs to sealing device, at the bottom of cover plate Portion is provided with exhaustor.
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