CN109970146A - A kind of oil-water separating agent handling oily waste water and its application in crude oil electric desalting drainage sunk well - Google Patents
A kind of oil-water separating agent handling oily waste water and its application in crude oil electric desalting drainage sunk well Download PDFInfo
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- CN109970146A CN109970146A CN201910291283.2A CN201910291283A CN109970146A CN 109970146 A CN109970146 A CN 109970146A CN 201910291283 A CN201910291283 A CN 201910291283A CN 109970146 A CN109970146 A CN 109970146A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/047—Breaking emulsions with separation aids
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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Abstract
The oil-water separating agent that the present invention provides a kind of processing oily waste water includes two 100 parts of tertiary butyl ether of ethylene glycol, 30-80 parts of the polyisobutene of average molecular weight 800-1300,20-60 parts of propylene glycol diacetate, 5-20 parts of alpha-pyrrolidone in terms of mass fraction；Suitable for handle oil-in-water type containing mineral oil, bio-oil waste water.It is particularly suitable for crude oil such as peracid crude oil with poor quality, weight crude oil with poor quality adds the processing of oily waste water that electric desalting apparatus is arranged under the conditions of more demulsifier, oil content in separating obtained water phase can control 150mg/L or less, the water content of gained oil phase can be lower than 0.3m%, and crude oil goes atmospheric and vacuum distillation unit normal process after being pumped into electro-desalting.
Description
Technical field
The invention belongs to field of waste water treatment, and in particular to it is a kind of handle oily waste water oil-water separating agent and its crude oil electricity
Application in desalination drainage sunk well.
Background technique
Deep electric desalting is that the basic skills of processing crude oil institute salt concentration is aided with brokenly under high voltage electric field and heating condition
The means such as emulsion, ultrasonic wave are washed institute's salt concentration in crude oil in water by one or many injections such as the water of 2-5%, it is laggard
Row water-oil separating, while controlling the water content of crude oil and the oil content of draining after processing.By deep electric desalting technique, generally may be used
By crude Treatment to salt content lower than 3mg/L, water content be lower than 0.2%, the oil content of institute's effluent can control 150mg/L with
It is interior.When operating normal, the oil content of electro-desalting institute effluent is lower, and being sent to sewage-treatment plant, can to carry out normal oil removal-floating
Choosing-biochemical process processing.
But the finiteness and lag of fluctuation and complexity, electro-desalting manipulation regulating measure due to crude oil condition, Hen Duolian
The electric desalting apparatus of oily factory often has the waste water of the far super 150mg/L of a large amount of oil content to be discharged, and drains oil content sometimes and is even up to
To 10% or so, it is limited that this high oil-containing wastewater is blended into the usual effect of return electro-desalting processing in electro-desalting water filling, or can make
At the aqueous problem not up to standard of salt content in crud oil after electro-desalting.This higher electro-desalting waste water of oil content, is sent at sewage device
Very big impact can be caused when reason to oil removal-flotation-biochemical process or is difficult to handle, waste water is often resulted in and blocks up library.Another party
Face, the waste oil that this higher electro-desalting waste water of oil content is recycled in sewage device processing, due to being enriched in other waste water
Complicated ingredient, usually inconvenient to utilize directly as Atmospheric vacuum, catalytic cracking or the raw material of coking, some is also difficult to convey.
Thus, it is necessary to a kind of technology for handling this kind of high oil-containing wastewater is developed, especially by being simply mixed into grease
Release agent and realize high efficiency oil-water separation method.
Summary of the invention
In order to solve the above technical problems, the present invention provide it is a kind of handle oily waste water oil-water separating agent and its crude oil electricity
Application in desalination drainage sunk well.
The present invention handle oily waste water oil-water separating agent, in terms of mass fraction, comprising two 100 parts of tertiary butyl ether of ethylene glycol,
30-80 parts of the polyisobutene of average molecular weight 800-1300,20-60 parts of propylene glycol diacetate, 5-20 parts of alpha-pyrrolidone.
Wherein, the polyisobutene is the polyisobutene of average molecular weight 800 and/or the poly- isobutyl of average molecular weight 1300
The two is preferably used in mixed way by alkene, the two mass fraction ratio be 100:(30-60) when it is preferable；The propylene glycol diacetate
For 1,2- propylene-glycol diacetate.
Wherein, optimum ratio is 40 parts of polyisobutene, the average mark of two 100 parts of tertiary butyl ether of ethylene glycol, average molecular weight 800
20 parts of the polyisobutene of son amount 1300,40 parts of propylene glycol diacetate, 10 parts of alpha-pyrrolidone.
Oil-water separating agent of the invention, by by the tertiary butyl ether of ethylene glycol two, polyisobutene, propylene glycol diacetate, α-pyrrole
Mixture is stirred evenly and can be prepared pyrrolidone in a reservoir, can be hot slightly.Gained oil-water separating agent is stable lotion.
Oil-water separating agent of the invention, suitable for handling the oily waste water of oil-in-water type, the oil include mineral oil and
Bio-oil, mineral oil in fluid include crude oil, machine oil, and bio-oil includes vegetable fat and animal fat；It is easy in waste water
It is very strong to the oily or demulsification of grease, fusion faculty in dispersion, dissolution and diffusion, oil or grease company easy to form after processing
Continuous oily phase.It is lower than 20% oily waste water to oil content, the amount that 50-2000mg can be added by 1L oily waste water is added, or presses
The 0.5-5m% of oil content is added, and operates under the conditions of 20-150 DEG C of water temperature, can get higher oil-water separation；Wherein divide
It can control 150mg/L or less or even 100mg/L hereinafter, gained oil recovery contains from the oil content in water after processing obtained by oily phase
Water can be lower than 0.3m% even below 0.2m%.Separating water phase obtained by oily phase can reach as clear as crystal level.Low temperature is contained
Oily waste water, oil or grease therein are solidification state or highly viscous, and oil-water separating agent of the invention can first be added, by waste water point
At water phase and oil-rich phase, oil-rich phase is heated to the molten condition or the further water-oil separating of low viscosity level of oil or grease, most
The oil content in separating obtained water phase can control 150mg/L or less or even 100mg/L hereinafter, the water content of gained oil phase can eventually
Lower than 0.3m% even below 0.2m%.
Oil-water separating agent of the invention and a kind of efficiently anti-demulsifier, be particularly suitable for crude oil such as peracid crude oil with poor quality,
Weight crude oil with poor quality adds the processing of the arranged oily waste water of electric desalting apparatus under the conditions of more demulsifier, can be by crude oil electric desalting oil-containing
Waste water separates well, and the oil content in separating obtained water phase can control 150mg/L or less or even 100mg/L hereinafter, gained
The water content of oily phase can be lower than 3mg/L even below 0.2m%, salt content lower than 0.3m%.The arranged oily waste water of electric desalting apparatus
Emulsified component and/or breaker component contained by oil droplets in water often make oil droplet stable in water and are difficult to collide to melt instead
It closes.Contain more naphthenate in the peracid crude oil with poor quality, demulsification and desalination are difficult, and weight crude oil with poor quality desalination condition is harsh, electricity
The oil content of desalinization wastewater is easy exceeded；The oil-in-water system of oily waste water is stablized, it is difficult to pass through conventional sedimentation, centrifugal method
Carry out water-oil separating.
Oil-water separating agent of the invention is used for the processing of the arranged oil-containing overstandard waste water of crude oil electric desalting, can be directly using such as
130-145 DEG C of waste water temperature condition and using waste water buffer reservoir as gun barrel, do not increase substantially it is other need compared with
The equipment or container more invested, moreover it is possible to which auxiliary and guaranteeing role are played to the operation of crude electric desalter.It is preferred that using two
Or the above gun barrel carries out gravity settling separation oil phase and water phase.For the low temperature waste water containing crude oil of accumulation, can first add
Enter oil-water separating agent of the invention, waste water is divided into water phase and oil-rich phase, oil-rich phase is heated to such as 80-150 DEG C of progress grease point
From the oil content in final separation gained water phase can control 150mg/L or less or even 100mg/L hereinafter, gained oil phase contains
Water can be lower than 3mg/L even below 0.2m%, salt content lower than 0.3m%.
Oil-water separating agent of the invention can be stirred after injecting waste water by pipe-line mixer, that is, static mixer or machinery
It the modes such as mixes and waste water mixes, then gravitational settling layering or by centrifugal process progress water-oil separating, wherein release agent ingredient is basic
It is upper to enter oily phase, it is further utilized with oil recovery, and have substantially no effect on the further processing of oil recovery.Such as in processing crude oil electricity
The oily phase recycled when desalinization wastewater, crude oil goes atmospheric and vacuum distillation unit normal process after being pumped into electro-desalting, when second-rate
It can send to catalytic cracking unit or coking plant and be processed.Oil-water separating agent of the invention is free of inorganic matter, without ash content, leads to
The 0.5-5% for often only accounting for recycled crude oil amount, does not influence the operation and effect of atmospheric and vacuum distillation unit, catalytic cracking unit or coking plant
Fruit.
Specific embodiment
By the following examples, the present invention is specifically described in comparative example, but is not construed as limiting the invention.
Embodiment 1-10, comparative example 1-9
By the proportion of table 1, the oil-water separating agent of embodiment 1-10, comparative example 1-9 are prepared respectively；Compounding method is burnt in 500ml
The tertiary butyl ether of ethylene glycol two, the propylene glycol diacetate, alpha-pyrrolidone of dosage are first added in cup, is added in electric stirring average
The polyisobutene of molecular weight 800 adds the polyisobutene of average molecular weight 1300 again, continues to be stirred until homogeneous, Zhi Houfen after stirring evenly
It Zhuan Ru not reagent bottle preservation.
The proportion of 1 oil-water separating agent of table, unit g
Application examples 1
Take certain arranged oily waste water of peracid crude oil with poor quality electric desalting apparatus, oil content 8.1g/L, in room temperature or 90 DEG C of placement 5h
It is not stratified, do not form oil-continuous phase；Oily waste water 1000ml is added in 1000ml beaker, be heated to 80 DEG C and implementation is added
The 230 μ l about 200mg(of oil-water separating agent of example 1 is added by the 2.5m% of oil content), it stirs evenly to be placed in 80 DEG C of incubators and place
2h, record place water-oil separating situation when 1h, 2h, and the oil content of water phase after 2h is placed in detection.
By identical method, oily waste water 1000ml is successively added in 18 1000ml beakers, is heated separately to 80
DEG C and sequentially add embodiment 2-10, the 230 μ l about 200mg(of oil-water separating agent of comparative example 1-9 is added by the 2.5m% of oil content
Enter, a kind of oil-water separating agent only added in each beaker), it stirs evenly to be placed in 80 DEG C of incubators and places 2h, when record places 1h, 2h
Water-oil separating situation, detection place 2h after water phase oil content.The oily waste water separately is added in a 1000ml beaker
1000ml, be heated to 80 DEG C be placed directly in 80 DEG C of incubators place 2h as blank control.
Test case is listed in Table 2 below, and wherein the oil content of water phase is the oil-containing away from bottom of a cup 20-30% liquid depths institute water sampling
Amount.
Embodiment 1-10 oil-water separating agent is handled into oil-continuous phase collected by waste water and respectively takes 5ml, is mixed, measured moisture content
0.18m% surveys salt content and is lower than 3mg/L.
80 DEG C treatment effect situations of each oil-water separating agent of table 2 to oil content 8.1g/L crude oil electric desalting waste water, additional amount
200mg/L
。
Application examples 2
Take certain arranged oily waste water of peracid crude oil with poor quality electric desalting apparatus, oil content 46g/L, in room temperature or 90 DEG C of closed placements
3h is not stratified, does not form oil-continuous phase；In 1000ml beaker, by the method for application examples 1, successively in 19 1000ml beakers
Oily waste water 1000ml is added, be heated separately to 90 DEG C and sequentially adds the oil-water separating agent of embodiment 1-10, comparative example 1-9
570 μ l about 500mg(are added by the 1.1% of oil content, and a kind of oil-water separating agent is only added in each beaker), it stirs evenly and is placed on 90 DEG C
2h is placed in incubator, record places water-oil separating situation when 1h, 2h, and the oil content of water phase after 2h is placed in detection.Separately one
Oily waste water 1000ml is added in a 1000ml beaker, is heated to 90 DEG C and is placed directly within placement 2h conduct sky in 90 DEG C of incubators
White control.
Test case is listed in Table 3 below, and wherein the oil content of water phase is the oil-containing away from bottom of a cup 20-30% liquid depths institute water sampling
Amount.
Embodiment 1-10 oil-water separating agent is handled into oil-continuous phase collected by waste water and respectively takes 10ml, is mixed, measured moisture content
0.23m%, salt content are lower than 3mg/L.
90 DEG C treatment effect situations of each oil-water separating agent of table 3 to oil content 46g/L crude oil electric desalting waste water, additional amount
500mg/L
。
Application examples 3
Take certain weight arranged oily waste water of crude oil with poor quality electric desalting apparatus, oil content 150g/L, in room temperature or 90 DEG C of closed placements
3h is not stratified, does not form oil-continuous phase；Oily waste water 1000ml is added in 1000ml beaker, be heated to 90 DEG C and reality is added
The 1700 μ l about 1500mg of oil-water separating agent for applying example 1, stirs evenly to be placed in 90 DEG C of incubators and places 3h, when record places 2h, 3h
Water-oil separating situation, detection place 3h after water phase oil content.
By identical method, oily waste water 1000ml is successively added in 18 1000ml beakers, is heated separately to 90
DEG C and sequentially add embodiment 2-10, comparative example 1-9 1700 μ l about 1500mg(of oil-water separating agent by oil content 1.0% plus
Enter, a kind of oil-water separating agent only added in each beaker), it stirs evenly to be placed in 90 DEG C of incubators and places 3h, when record places 2h, 3h
Water-oil separating situation, detection place 3h after water phase oil content.
Test case is listed in Table 4 below, and wherein the oil content of water phase is the oil-containing away from bottom of a cup 20-30% liquid depths institute water sampling
Amount.Oily waste water 1000ml is separately added in a 1000ml beaker, is heated to 90 DEG C and is placed directly in 90 DEG C of incubators put
3h is set as blank control.
Embodiment 1-10 oil-water separating agent, which is handled oil-continuous phase collected by waste water, respectively takes 50ml measured moisture content to be below
0.3m% surveys salt content and is below 3mg/L.
90 DEG C treatment effect situations of each oil-water separating agent of table 4 to oil content 150g/L crude oil electric desalting waste water, additional amount
1500mg/L
。
Application examples 4
Three kinds of each 1000ml of oily waste water, every kind of oily waste water used in application examples 1-3 are separately added into six 1000ml beakers
It each two glasss, is heated separately to 80 DEG C and the oil-water separating agent of embodiment 5 is added, stir evenly the cup holder for being placed on 100L pressure resistance reaction kettle
In, oil-water separating agent additional amount is as listed in table 5；It is each that three kinds of oily waste waters are separately separately added into three 1000ml beakers
1000ml is heated in the cup holder that 80 DEG C are placed directly within pressure-resistant reaction kettle as blank control.The nine beaker outer dimension
Identical, the beaker bottom surface in pressure-resistant reaction kettle cup holder is in identical level height.Discharge injection 80 in reaction kettle after beaker
DEG C hot water closes reaction kettle capping to flushing with liquid level in beaker, fills high pure nitrogen to 0.6MPa pressure release again, it is high-purity to repeat charge and discharge
High pure nitrogen is filled after six displaced airs of nitrogen again to 0.6MPa, hot water in reaction kettle is warming up to 140 DEG C by power transmission later, constant temperature
Pressure release after hot water in reaction kettle is cooled to 80 DEG C by cooling water is opened in power-off after 1h, is opened reaction kettle capping, is taken out nine beakers.Behaviour
During work, hot water is warming up to 140 DEG C of time and is in refueling water release agent to reaction kettle since waste water in first beaker
0.4h, from open cooling water to hot water be cooled to 80 DEG C, pressure release, Kaifeng lid, time for all taking out of nine beakers be 0.3h.
It checks the water-oil separating situation in each beaker, and each oily phase, water phase is detected, be as a result listed in table 5.
140 DEG C processing of each oil-water separating agent of table 5 to oil content 8.1g/L, 46g/L, 150g/L crude oil electric desalting waste water
Effect situation
。
Application examples 5
Three kinds of each 1000ml of room temperature oily waste water, every kind of oil-containing used in application examples 1-3 are separately added into six 1000ml beakers
It each two glasss of waste water, does not heat, each oil-water separating agent that embodiment 5 is added stirs evenly, oil-water separating agent additional amount is as listed by table 6；Separately
It is separately added into three kinds of each 1000ml of oily waste water in three 1000ml beakers, does not heat, oil-water separating agent is not added as empty
White control.Be placed at room temperature for the water-oil separating situation checked after 1h in each beaker, wherein non-refueling water release agent without visible change；
The upper layer that oil-water separating agent is added forms oil-rich phase, and oil-rich phase transparent aqueous phase formed below takes out the oil-rich phase in each cup, point
It is not placed in low capacity beaker and is heated to 90 DEG C and is placed in 90 DEG C of incubators and places form oil-continuous phase after 1h, oily Xiang Shangwu foam,
Oil water phase interface is clear, and water phase is transparent, detects respectively to the merging water phase of each oily phase, room temperature water phase and 90 DEG C of water phases,
As a result it is listed in table 6.
+ 90 DEG C for the treatment of effect situations of room temperature of each oil-water separating agent of table 6 to oil content 150g/L crude oil electric desalting waste water
。
Claims (10)
1. a kind of oil-water separating agent for handling oily waste water, in terms of mass fraction, comprising two 100 parts of tertiary butyl ether of ethylene glycol, averagely
30-80 parts of the polyisobutene of molecular weight 800-1300,20-60 parts of propylene glycol diacetate, 5-20 parts of alpha-pyrrolidone.
2. oil-water separating agent as described in claim 1, which is characterized in that the polyisobutene is the poly- of average molecular weight 800
The polyisobutene of isobutene and/or average molecular weight 1300.
3. oil-water separating agent as claimed in claim 2, which is characterized in that the polyisobutene peace of the average molecular weight 800
The polyisobutene of average molecular weight 1300, the mass fraction ratio of the two are 100:(30-60).
4. oil-water separating agent as claimed in claim 2, which is characterized in that include two 100 parts of tertiary butyl ether of ethylene glycol, mean molecule
40 parts of polyisobutene, 20 parts of the polyisobutene of average molecular weight 1300,40 parts of propylene glycol diacetate, α-pyrrolidines of amount 800
10 parts of ketone.
5. oil-water separating agent as described in claim 1, which is characterized in that suitable for handling the oily waste water of oil-in-water type；With/
Or the oil includes mineral oil and bio-oil.
6. oil-water separating agent as described in claim 1, which is characterized in that oily waste water is added by the amount of 50-2000mg/L, or
Person is added by the 0.5-5m% of oil content；And/or water-oil separating treatment temperature is 20-150 DEG C.
7. application of the oil-water separating agent as described in claim 1 in the arranged oiliness sewage treatment of crude electric desalter.
8. application of the oil-water separating agent as claimed in claim 7 in the arranged oiliness sewage treatment of crude electric desalter, special
Sign is that the crude oil includes or comprising peracid crude oil with poor quality, weight crude oil with poor quality.
9. application of the oil-water separating agent as claimed in claim 8 in the arranged oiliness sewage treatment of crude electric desalter, special
Sign is, water-oil separating processing operation is carried out under the conditions of 130-145 DEG C of temperature of crude oil electric desalting arranged oily waste water.
10. application of the oil-water separating agent as claimed in claim 8 in the arranged oiliness sewage treatment of crude electric desalter, special
Sign is that the oily phase recycled when handling crude oil electric desalting waste water, crude oil goes atmospheric and vacuum distillation unit normally to add after being pumped into electro-desalting
Work, or give to catalytic cracking unit or coking plant and processed.
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|---|---|---|---|
| CN201910291283.2A CN109970146B (en) | 2019-04-11 | 2019-04-11 | Oil-water separating agent for treating oily wastewater and application of oil-water separating agent in crude oil electric desalting drainage treatment |
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|---|---|---|---|
| CN201910291283.2A CN109970146B (en) | 2019-04-11 | 2019-04-11 | Oil-water separating agent for treating oily wastewater and application of oil-water separating agent in crude oil electric desalting drainage treatment |
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Cited By (1)
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| CN110467941A (en) * | 2019-08-20 | 2019-11-19 | 山东京博石油化工有限公司 | A kind of processing method and system of crude oil electric desalting draining |
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