CN102094616B - Method for separating flocculent organic matters from polymer-containing oil sludge - Google Patents

Method for separating flocculent organic matters from polymer-containing oil sludge Download PDF

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Publication number
CN102094616B
CN102094616B CN201010586377.1A CN201010586377A CN102094616B CN 102094616 B CN102094616 B CN 102094616B CN 201010586377 A CN201010586377 A CN 201010586377A CN 102094616 B CN102094616 B CN 102094616B
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greasy filth
poly
water
time
polymer
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CN102094616A (en
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靖波
檀国荣
张健
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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Institute of Chemistry of CAS
China National Offshore Oil Corp CNOOC
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Abstract

The invention discloses a method for separating flocculent organic matters from polymer-containing oil sludge, which comprises the following steps of: adding water into the polymer-containing oil sludge, shearing and stirring, centrifuging, standing at the constant temperature, wherein the organic matters exist in a water phase to be separated; the mass ratio of the polymer-containing oil sludge to the water is 1:(1-4); in the step of shearing and stirring, the rotating speed is 3,500rpm, and time is 1 to 5 minutes; in the step of centrifuging, the rotating speed is 3,500rpm, and time is 5 to 20 minutes; and in the step of standing at the constant temperature, the temperature is between 50 and 80 DEG C, and time is 0.5 to 24 hours. A small number of pieces of equipment is selected, the method is simple and convenient, and easy to operate, a medicament is not added, impurities are prevented from being introduced, and the aftertreatment process cannot be influenced; crude oil can be separated and recovered by high-speed shearing and centrifuging; and organic flocculent precipitates, mud and sand are separated and can be researched and treated respectively, so that a cheaper and more high-efficiency oil sludge treatment method or medicament is found.

Description

A kind of separation is containing cotton-shaped organic method in poly-greasy filth
Technical field
The invention belongs to oil field environment-protection technical field, relate to a kind of separation containing cotton-shaped organic method in poly-greasy filth.
Background technology
Oily sludge is to be accompanied by oil field development to produce the accessory substance occurring, owing to containing a large amount of former oil and the organic matter's in greasy filth, makes the intractability of such mud larger.In early days, the greasy filth that oil field, land produces is taked the form of stacking more.Cause on the one hand the waste of crude resources, the more important thing is that greasy filth can cause the huge pollution of surrounding environment when stacking, and comprises atmosphere, underground water and soil etc.In general, the mode of disposal of oily sludge has abstraction technique, solidification technology, incineration treatment technology, biologic treating technique, re-injection and profile control technique and other technology etc.The main purpose of disposal of oily sludge is crude oil and the hazardous substances of removing wherein, and accomplishes as far as possible twice laid and reduce costs, and avoids secondary pollution, reaches harmless treatment and the recycling of oily sludge.
Along with the application of the technology such as polyacrylamide polymer drives in oil field development field, when improving oil recovery factor, can be accompanied by the output of polymer, indirectly cause the increase of greasy filth amount in crude Treatment flow process.Be because polymer solution viscosity is larger on the one hand, can carry out from stratum more silt particle; The chemical agent adding in some organic component and oil-water process system in high volence metal ion, crude oil in polymer molecular chain and stratum on the other hand can be further combined with, forms a large amount of organic flocculent deposits.And the existence of organic flocculent deposit can cause mud oil content to increase, and aggravate the difficulty that greasy filth is processed.At present, particularly many according to the physical property of each component in greasy filth and state containing the processing of poly-greasy filth to greasy filth, utilize mechanical method to carry out separated and processing (a kind of processing method of oil-containing mud sand, number of patent application 200710301060.5; A ground sludge hot chemical treatment method, number of patent application 200710011242.0).And greasy filth component is extremely complicated, wherein the existence of some a small amount of organic component is but to cause one of key factor that greasy filth intractability is large, also lacks now the further Study on thinning of respective components.If can obtain a kind of separation containing the method for organic floccule in poly-greasy filth, and then study and process for its physicochemical properties, can make greasy filth treatment measures more effective.
Summary of the invention
The object of this invention is to provide a kind of separation containing cotton-shaped organic method in poly-greasy filth.
Separation provided by the invention is containing cotton-shaped organic method in poly-greasy filth, comprise the steps: described containing adding water in poly-greasy filth, shear agitation and centrifugal after, after constant temperature is placed, the described cotton-shaped organic matter containing gathering in greasy filth is present in water, completes described separation containing cotton-shaped organic method in poly-greasy filth.
In the method, the described mass ratio containing poly-greasy filth and water is 1: 1-4, specifically can be 1: 1-2,1: 1-3,1: 2-3,1: 2-4 or 1: 3-4, preferably 1: 3.In described shear agitation step, rotating speed is 1000~4000rpm, preferably 3500rpm,, the time is 1-5 minute, specifically can be 1-3 minute or 3-5 minute, preferably 3 minutes, this step can be carried out shear agitation with various conventional agitators, as can be U.S. Waring Blender agitator.In described centrifugation step, rotating speed is 1000~4000rpm, preferred 3500rpm, and the time is 5-20 minute, is specially 5-10 minute or 10-20 minute, preferably 10 minutes; After above-mentioned centrifugation step, the system forming containing poly-greasy filth and water be divided into (oil reservoir), in (water layer) and under (dirty sand) three layers; Described constant temperature is placed in step, and temperature is 50-80 ℃, and preferably 60 ℃, the time is 0.5~24 hour, preferably 6 hours.Various water is all applicable to the method, the mineralized water utilizing as secondary in pure water or oil field etc.
Method tool provided by the invention has the following advantages: (1) selects equipment few, and method is easy, simple to operate, is convenient to implement; (2) do not add any medicament, avoided impurity introducing, can not affect last handling process; (3) utilize high speed shear can realize the separated of crude oil and reclaim with centrifugal; (4) separation obtains organic flocculent deposit and silt particle, can study respectively and process, thereby find more cheap efficient greasy filth treatment technology or medicament.
Accompanying drawing explanation
Fig. 1 is photo after embodiment 1 processes containing poly-greasy filth.
Fig. 2 is the infrared spectrogram of system after embodiment 1 separation, wherein, and the organic flco in 1-intermediate layer; 2-is untreated containing poly-greasy filth; 3-partially hydrolyzed polyacrylamide (PHPA); Lower floor's mud after 4-processes.
Fig. 3 is photo after embodiment 2 processes containing poly-greasy filth.
Fig. 4 is photo after embodiment 3 processes containing poly-greasy filth.
Fig. 5 is photo after embodiment 4 processes containing poly-greasy filth.
Fig. 6 is that reference examples contains the rear photo of poly-greasy filth processing.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described, but the present invention is not limited to following examples.Experimental technique in following embodiment, if no special instructions, is conventional method.In following embodiment, material used, reagent etc., if no special instructions, all can obtain from commercial channels.In the present invention, containing poly-greasy filth, refer to the mixture of the medium compositions such as crude oil and earth and polymer, refer in particular to the crude oil of the organic components such as polymer of sneaking into earth and the poly-output of note.
Shearing experiment in the following embodiment 1-5 of the present invention adopts U.S. Waring Blender agitator 1 grade (3500rpm) to carry out.
In the following embodiment 1-5 of the present invention used containing poly-greasy filth be oil field, Area of Bohai output containing poly-greasy filth, (crude oil that the water that is 50% by quality percentage composition, quality percentage composition are 10-30% and other solid constituent (silt particle, polyacrylamide, profit treatment agent, corrosive pipeline dirt and bacterium etc.) form; Mineralized water used is the mineralized water in corresponding oil field, and salinity is 3159mg/L, wherein, and K +and Na +concentration be 1079mg/L, Ca 2+concentration be 7mg/L, Mg 2+concentration be 13mg/L, CO 3 2-concentration be 128mg/L, HCO 3 -concentration be 858mg/L, SO 4 2-concentration be 30mg/L, Cl -concentration be 1044mg/L.
Embodiment 1,
What by mass ratio, be 1: 1 contains poly-greasy filth 40g and 1 grade, Waring Blender agitator (rotating speed is 3500rpm) shearing 1min for mineralized water 40g, 3500rpm centrifugal (centrifugation factor is 1960) 5min subsequently, the volume ratio that known oil reservoir, water layer and dirty sand are calculated in range estimation is 1: 5.5: 3, putting into 60 ℃ of insulating box constant temperature places after 6h, in water, there is cotton-shaped organic aggregate, complete containing cotton-shaped organic separation in poly-greasy filth.
Embodiment 2,
What by mass ratio, be 1: 2 contains poly-greasy filth 40g and 1 grade, Waring Blender agitator (rotating speed is 3500rpm) shearing 3min for mineralized water 80g, 3500rpm centrifugal (centrifugation factor is 1960) 10min subsequently, the volume ratio that known oil reservoir, water layer and dirty sand are calculated in range estimation is 0.5: 6: 3, putting into 60 ℃ of insulating box constant temperature places after 6h, in water, there is cotton-shaped organic aggregate, complete containing cotton-shaped organic separation in poly-greasy filth.
Embodiment 3,
What by mass ratio, be 1: 3 contains poly-greasy filth 40g and 1 grade, Waring Blender agitator (rotating speed is 3500rpm) shearing 5min for mineralized water 120g, 3500rpm centrifugal (centrifugation factor is 1960) 10min subsequently, the volume ratio that known oil reservoir, water layer and dirty sand are calculated in range estimation is 0.5: 7.5: 3, putting into 60 ℃ of insulating box constant temperature places after 6h, in water, there is cotton-shaped organic aggregate, complete containing cotton-shaped organic separation in poly-greasy filth.
Embodiment 4,
What by mass ratio, be 1: 4 contains poly-greasy filth 40g and 1 grade, Waring Blender agitator (rotating speed is 3500rpm) shearing 3min for mineralized water 160g, 3500rpm centrifugal (centrifugation factor is 1960) 20min subsequently, the volume ratio that known oil reservoir, water layer and dirty sand are calculated in range estimation is 0.5: 7: 2.5, putting into 60 ℃ of insulating box constant temperature places after 6h, in water, there is cotton-shaped organic aggregate, complete containing cotton-shaped organic separation in poly-greasy filth.
Reference examples
What by mass ratio, be 1: 3 contains poly-greasy filth 40g and 1 grade, Waring Blender agitator (rotating speed is 3500rpm) shearing 5min for mineralized water 120g, 3500rpm centrifugal (centrifugation factor is 1960) 10min subsequently, the volume ratio that known oil reservoir, water layer and dirty sand are calculated in range estimation is 0.5: 7.5: 3, room temperature is placed after 24h, water, without cotton-shaped organic aggregate, can not be realized containing cotton-shaped organic separation in poly-greasy filth.
Fig. 1, Fig. 3-6 are for embodiment 1-5 is containing the photo in kind gathering after greasy filth is processed, and in Fig. 1, organic flco is cotton-shaped organic matter.As seen from the figure, after processing by the inventive method, containing poly-greasy filth, be divided into upper, middle and lower-ranking, upper strata is oil phase, and middle level is water, wherein has cotton-shaped organic matter, lower floor is dirty sand, wherein contain a large amount of silt particles and a small amount of water, has realized the separated of crude oil, cotton-shaped organic matter and silt particle.
Fig. 2 is the infrared spectrogram of system after embodiment 1 separation, wherein, and the organic matter that 1-is cotton-shaped; 2-is unsegregated containing poly-greasy filth; 3-partially hydrolyzed polyacrylamide (PHPA) (contrast is used); The silt particle that 4-separation produces afterwards.As seen from the figure, 3450 and 1640cm -1corresponding to amide group, illustrate and in cotton-shaped organic matter, only contain micro-partially hydrolyzed polyacrylamide (PHPA); 1112cm -1corresponding to diether linkage structure, show may contain in cotton-shaped organic matter the residual components of a large amount of polyether type demulsifying agents.Embodiment 2-4 acquired results similarly, is no longer endured and is stated herein.

Claims (5)

1. a separation is containing cotton-shaped organic method in poly-greasy filth, comprise the steps: described containing adding water in poly-greasy filth, shear agitation and centrifugal after, constant temperature is placed, the described cotton-shaped organic matter containing gathering in greasy filth is present in water, completes described separation containing cotton-shaped organic method in poly-greasy filth; Described constant temperature is placed in step, and temperature is 50-80 ℃, and the time is 0.5~24 hour;
The described mass ratio containing poly-greasy filth and water is 1:1-4; In described shear agitation step, rotating speed is 1000~4000rpm, and the time is 1-5 minute; In described centrifugation step, rotating speed is 1000~4000rpm, and the time is 5-20 minute.
2. method according to claim 1, is characterized in that: the described mass ratio containing poly-greasy filth and water is 1:3.
3. method according to claim 1, is characterized in that: in described shear agitation step, rotating speed is 3500rpm, and the time is 3 minutes.
4. method according to claim 1, is characterized in that: in described centrifugation step, rotating speed is 3500rpm, and the time is 10 minutes.
5. according to the method described in any one in claim 1-4, it is characterized in that: described constant temperature is placed in step, and temperature is 60 ℃, and the time is 6 hours.
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CN103833105B (en) * 2014-02-24 2016-03-23 中国海洋石油总公司 A kind of method containing gathering oil-sludge treatment and crude oil recovery
CN105198187B (en) * 2015-10-08 2017-06-30 中国海洋石油总公司 A kind of dispersion and processing method containing poly- sludge

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