CN209940658U - Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device - Google Patents

Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device Download PDF

Info

Publication number
CN209940658U
CN209940658U CN201920011166.1U CN201920011166U CN209940658U CN 209940658 U CN209940658 U CN 209940658U CN 201920011166 U CN201920011166 U CN 201920011166U CN 209940658 U CN209940658 U CN 209940658U
Authority
CN
China
Prior art keywords
oil
filtering
crude oil
filter
oil recovery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201920011166.1U
Other languages
Chinese (zh)
Inventor
丁超
徐家祥
董喜贵
邱继光
温成
蒋家泰
黄新宇
李平
Original Assignee
丁超
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 丁超 filed Critical 丁超
Priority to CN201920011166.1U priority Critical patent/CN209940658U/en
Application granted granted Critical
Publication of CN209940658U publication Critical patent/CN209940658U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to a processing and crude oil recovery unit of ternary combination flooding oil recovery waste water for the oil waste water of driving the oil recovery in the oil field carries out crude oil recovery, crude oil recovery unit includes that an at least integrated processing apparatus, an at least air supporting device, an at least meticulous oil filter device and an at least precision filter communicate in proper order, wherein integrated processing apparatus's anterior segment and a pipeline mixer intercommunication, through the compound treating agent is thrown to the pipeline mixer, crude oil recovery unit further includes an at least oil trap, the oil trap respectively with integrated processing apparatus the air supporting device reaches meticulous oil filter device connects, with right integrated processing apparatus the air supporting device reaches the crude oil that meticulous oil filter device triplex was collected is collected and is deposited.

Description

Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device
Technical Field
The utility model belongs to the technical field of sewage treatment and energy utilization, mainly relate to an utilize ASP flooding oil recovery waste water's processing and crude oil recovery method and recovery unit to retrieve the oily waste water in the oil field.
Background
Most oil fields in China already enter a tertiary oil recovery stage, polymer flooding or ternary combination flooding is the most important tertiary oil recovery technology, and the method is widely popularized in many oil fields at present. With the wide application of polymer flooding, a large amount of polymer oil extraction wastewater is generated, the content of the oil extraction wastewater reaches 80-90%, and the content of the oil extraction wastewater reaches more than 95% in some oil fields. The ternary combination flooding adopts surfactant, alkali and polymer to carry out oil recovery. Compared with the water quality condition of the common water-drive oil-extraction wastewater, the ASP-drive oil-extraction wastewater has high oil content and contains a large amount of polymers (mainly polyacrylamide), the polymers reach more than 700mg/L, the alkalinity is high, the hydrogen ion concentration index (hereinafter referred to as pH) value is more than 9-10, and the surfactant is about 80 mg/L. The existence of the polymer and the alkali increases the viscosity of the sewage, enhances the oil carrying capacity of the water phase, and simultaneously enhances the stability of the emulsion of the oil-in-water system of particles such as oil drops in water, thereby increasing the difficulty of oil-water separation. Therefore, the traditional sedimentation-filtration reinjection treatment process of the oil field cannot meet the requirements, so that the treatment problem of the ASP flooding wastewater becomes an important subject to be solved urgently in the oil field of China.
In the prior art, for example, in a method for treating ASP flooding wastewater (patent No. 200910019041.4), a method for driving oil recovery wastewater is disclosed, but the method needs to adjust the pH value of wastewater to be alkaline or strongly alkaline, and a magnesium salt-based treating agent is added to the wastewater according to the oil content and suspended matter content in the wastewater. The utility model discloses a technique of driving oil recovery waste water is not only big with medicine volume, and the cost is higher moreover to owing to need add a large amount of alkalis in to sewage, consequently lead to the injection stratum scale deposit easily.
In another utility model named "a method for treating sewage by polymer flooding and binary combination flooding-SP" (patent No. 201210119871.6), industrial ferrous sulfate, industrial ammonium persulfate, a large amount of coagulant and polyacrylamide flocculant are added in sequence, so that a large amount of precipitate is generated although the suspended matter and oil content in water after treatment can reach 10mg/L or less. Through this technical scheme to sewage treatment can greatly increased treatment cost.
In addition, in a utility model entitled "tertiary oil recovery wastewater treatment method" (patent No. 201610858728.7), there is also provided an oil recovery wastewater treatment method which requires pH adjustment of wastewater, then addition of a coagulant and a flocculant for treatment, and finally solid-liquid separation. However, this method requires a large amount of acid and alkali for adjusting the pH, and thus not only increases the treatment cost, but also the precipitate generated during the treatment further increases the treatment cost for treating the oil-containing wastewater.
Therefore, the oily water treatment methods in the prior art have no technology for completely recovering crude oil, only part of crude oil can be recovered in the oily water treatment process, and part of crude oil is wasted. Therefore, those skilled in the art continue to put on the utility model of a method for recovering crude oil from waste water of oil recovery to solve the above-mentioned problems of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a processing and crude oil recovery method of ASP flooding oil recovery waste water, wherein crude oil recovery method has no influence to original polymer and alkali in the sewage to can reduce the cost that next ASP drives the adoption.
An object of the utility model is to provide a processing and crude oil recovery method of ASP flooding oil recovery waste water, wherein the crude oil recovery method only breaks the emulsion and removes oil and carries out the cubic to crude oil and retrieve, does not have any influence to the quality of crude oil.
An object of the utility model is to provide a processing and crude oil recovery method of ASP flooding oil recovery waste water, wherein the crude oil recovery method can not produce any precipitate in the processing procedure to the retreatment cost to the thing of production has been avoided.
An object of the utility model is to provide a method of low cost, efficient processing ASP flooding oil recovery waste water to can accomplish sewage reinjection up to standard after handling ASP flooding oil recovery waste water.
An object of the utility model is to provide a processing and crude oil recovery method of ASP flooding oil recovery waste water, wherein the crude oil recovery method can be under the prerequisite of guaranteeing that the crude oil quality is not destroyed, retrieve the crude oil of about 99% in the oily waste water.
An object of the utility model is to provide a processing and crude oil recovery method of ASP flooding oil recovery waste water, wherein the crude oil recovery method is at first the emulsion waste water of accurate processing water drum oil system when handling oil waste water, carry out the breakdown of emulsion promptly to water drum oil, reuse physical method separates the surface oil slick and suspended oil and the suspended solid in with the waste water and handles, and does not handle polymer and alkali in the oil waste water, the water after the processing reaches the standard of oil field reinjection water, wherein the oil content is less than or equal to 20mg/L, it is less than or equal to 20mg/L to contain the suspended solid.
That is to say, through ASP flooding oil recovery wastewater's processing and crude oil recovery method, can not only make the waste water after the crude oil recovery reach the oil content of reinjection water, contain the suspended solid standard, can keep the aquatic polymer content and the alkali content after handling unchanged basically again.
An object of the utility model is to provide a processing and crude oil recovery method of ASP flooding oil recovery waste water, wherein after the crude oil recovery method ended, when the ASP flooding oil recovery once more of underground oil reservoir as reinjection water, can reduce the addition of polymer and alkali to the cost of oil recovery once more has been reduced.
An object of the utility model is to provide a processing and crude oil recovery method of ASP flooding oil recovery waste water, wherein crude oil recovery method can carry out comprehensive recovery with the trace crude oil in the waste water to the productivity of crude oil has been increased, realizes creating income from this.
An object of the utility model is to provide a processing and crude oil recovery unit of ASP flooding oil recovery waste water, wherein crude oil recovery unit can carry out the cubic to oily waste water and collect to the recovery efficiency to oily waste water has been improved.
An object of the utility model is to provide a processing and crude oil recovery unit of ASP flooding oil recovery waste water, wherein crude oil recovery unit adopts macromolecular material as filter medium to improve crude oil recovery efficiency.
An object of the utility model is to provide a processing and crude oil recovery unit of ASP flooding oil recovery waste water, wherein crude oil recovery unit can adopt physical method to carry out crude oil recovery to do not influence the quality of retrieving the oil.
An object of the utility model is to provide a processing and crude oil recovery unit of ASP flooding oil recovery waste water, wherein filter medium can relapse a lot of used repeatedly to reduce the cost of recovery to crude oil.
An object of the utility model is to provide a processing and crude oil recovery unit of ASP flooding oil recovery waste water, wherein crude oil recovery unit can reduce the oiliness rate in the oil waste water to 1-20mg/L as required.
In order to achieve the above object, the present invention mainly provides a method for treating ASP flooding oil recovery wastewater and recovering crude oil, which is used for reinjecting oil wastewater produced by oil flooding in an oil field to standard treatment and recovering crude oil, the method for treating ASP flooding oil recovery wastewater and recovering crude oil comprises the following steps:
1001: sampling and testing the flooding oil-extraction wastewater to obtain the oil content, suspended matters, hydrogen ion concentration index (hereinafter referred to as pH), polymer concentration and alkali content in an oil-extraction wastewater sample;
1002: preparing components and adding amount of the composite treating agent according to the component values in the oil wastewater sample;
1003: the oil wastewater is uniformly mixed with the added composite treating agent through a pipeline mixer;
1004: the sewage after passing through the pipeline mixer enters the comprehensive treatment device, the O/W water system emulsion finishes demulsification under the action of a cavitation effect, and pollutants such as oil substances, surfactants and the like float on the water surface along with bubbles generated by the aeration device, so that crude oil recovery for the first time and suspended solid removal are carried out;
1005: the sewage treated by the comprehensive treatment device enters the air floatation device for further oil-water separation treatment and removal of suspended matters, so that the secondary crude oil recovery is achieved;
1006: and the sewage treated by the air floatation device enters the fine oil filtering device, so that the crude oil is recycled for the third time.
In some of these embodiments, the composite treatment agent is a mixture of a demulsifier, an oil removal flotation agent, a micro-flocculant, and water.
In some of these embodiments, the demulsifier is selected from one or more of anionic, cationic, nonionic, or zwitterionic demulsifiers.
In some of the embodiments, the oil removal flotation agent is selected from one or more of cationic polyacrylamide, polyacrylamide modified cationic polymer or polyether generated by reacting chloropropane with fatty alcohol.
In some embodiments, the micro-flocculant is one or more selected from polyamine cationic organic polymeric flocculant, polyquaternary ammonium cationic organic polymeric flocculant or cationic polyacrylamide.
In some embodiments, the bottom of the integrated treatment device is provided with at least one aeration device and at least one ultrasonic device, and the top of the integrated treatment device is provided with at least one oil collecting tank which comprises at least one oil scraping device.
In some embodiments, the air floating device is a micro-nano air floating device.
In some of these embodiments, the precision filter is configured as a precision bag filter.
In some of these embodiments, further comprising the step of:
1007: and the sewage treated by the fine oil filtering device enters the fine filter to further remove suspended matters in the sewage so as to enable the final effluent to reach the standard of oilfield reinjection water.
In some of these embodiments, the fine filter is capable of intercepting suspended matter having a particle size of 0.49um or less.
In some of these embodiments, the crude oil recovery process has a recovery of greater than 99% of the crude oil.
In some of these examples, the water treated by the crude oil recovery process has an oil content of 20mg/L or less and a suspended matter content of 20mg/L or less.
In some of these embodiments, the crude oil recovery process does not affect the polymer and base content of the original oil wastewater during the recovery process and does not produce precipitates.
The utility model further provides a processing and crude oil recovery unit of ternary combination flooding oil recovery waste water for the oil waste water of driving the oil recovery in the oil field carries out crude oil recovery, crude oil recovery unit includes that at least one synthesizes processing apparatus, an at least air supporting device, an at least meticulous oil filter device and an at least precision filter communicate in proper order, wherein synthesize processing apparatus's anterior segment and a pipeline mixer intercommunication, through compound processing agent is thrown to the pipeline mixer, crude oil recovery unit further includes an at least oil trap, the oil trap respectively with synthesize processing apparatus the air supporting device reaches meticulous oil filter device connects, and is right synthesize processing apparatus the air supporting device reaches the crude oil that meticulous oil filter device triplex was collected is collected and is deposited.
In some embodiments, the composite treatment agent is prepared by mixing a demulsifier, an oil removal flotation agent, a micro-flocculant and water.
In some embodiments, the fine oil filtering device includes at least one oil filtering tank and a filtering material basket movably disposed in the oil filtering tank, a filtering medium is disposed in the filtering material basket and used for filtering the sewage in the oil filtering tank, wherein at least one sewage inlet is disposed at a lower portion of the filtering material basket and communicated with the air floating device, and at least one sewage outlet is disposed at an upper portion of the filtering material basket so that the sewage passing through the filtering material basket is discharged through the sewage outlet.
In some of these embodiments, the filter media is a polymeric oil absorbent material.
In some embodiments, the polymeric oil absorbing material is deoiled by a pressure method or a vacuum method.
In some embodiments, the fine oil filtering apparatus further includes at least one supporting plate which is communicated with the upper part and the lower part of the filter basket and is arranged in the oil filtering tank body for supporting the filter basket.
In some embodiments, the supporting plate is uniformly provided with a plurality of through holes, so that sewage entering from the sewage inlet can uniformly pass through the supporting plate and enter the filter material basket for filtering.
In some embodiments, the fine oil filter apparatus further comprises at least one pre-tensioning device movably disposed within the canister body and disposed on top of the filter basket for pre-tensioning.
In some embodiments, the pre-tensioning device is an upper pressure plate movably disposed within the canister body and positioned at the top of the filter basket.
In some of the embodiments, the pre-tightening device further comprises at least one hydraulic/pneumatic cylinder and at least one connecting rod, wherein the connecting rod connects the hydraulic/pneumatic cylinder and the upper pressure plate, so that the pressure of the upper pressure plate is adjusted through the hydraulic/pneumatic cylinder.
Drawings
Fig. 1 is a schematic process flow diagram of a first embodiment of the method for treating ASP flooding oil-recovery wastewater and recovering crude oil according to the present invention.
Fig. 2 is a schematic structural diagram of a first embodiment of a fine oil filtering device in the ternary combination flooding oil-extraction wastewater treatment and crude oil recovery device of the present invention.
FIG. 3 is a schematic block diagram of a system for treating ASP flooding wastewater and regenerating a filter medium in a crude oil recovery device.
Fig. 4 is a flow chart of the crude oil recovery method of the ASP flooding oil-extraction wastewater of the utility model.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the utility model can be understood according to specific situations by those skilled in the art.
The utility model provides a unit drive oil recovery wastewater 100's crude oil recovery unit 10 for carry out crude oil recovery to the oily waste water 100 in the oil field. As shown in fig. 1, in the first embodiment of the present invention, the crude oil recovery device 10 includes at least one integrated processing device 110, at least one air floating device 120, at least one fine oil filtering device 130 and at least one fine filter 160, wherein the front section of the integrated processing device 110 is communicated with a pipeline mixer 140, and a composite treating agent 150 is added through the pipeline mixer 140, the crude oil recovery device 10 further includes at least one oil collecting tank 170, and the oil collecting tank 170 is respectively communicated with the integrated processing device 110, the air floating device 120 and the fine oil filtering device 130, and is used for collecting and storing crude oil collected by the integrated processing device 110, the air floating device 120 and the fine oil filtering device 130.
Preferably, in the first embodiment of the present invention, the composite treating agent 150 is formed by mixing a demulsifier, a degreasing flotation agent, a micro-flocculant and water.
The demulsifier adopts one or more of anionic, cationic, nonionic and zwitterionic demulsifiers.
The oil removal flotation agent is one or more of cationic polyacrylamide, polyacrylamide modified cationic polymer or polyether generated by the reaction of epichlorohydrin and fatty alcohol.
The micro-flocculant is one or more of polyamine cationic organic polymeric flocculant, polyquaternary ammonium salt cationic organic polymeric flocculant or cationic polyacrylamide.
The filter material in the fine oil filtering device 130 is a filter medium 13201 made of a polymer oil absorption material 132011, and the polymer oil absorption material 132011 can be conveniently desorbed and recycled.
The main purpose of the fine filter 160 is to remove suspended matter from the wastewater before discharging the filtered effluent 200. Preferably, in the first embodiment of the present invention, the precision filter 160 is a precision bag filter.
It should be noted that, as shown in fig. 2, the structure of the fine oil filtering device 130 according to the present invention is schematically illustrated. The fine oil filtering apparatus 130 includes an oil filtering tank 1310 and a filtering material basket 1320, wherein a filtering medium 13201 is disposed in the filtering material basket 1320, the filtering material basket 1320 is disposed inside the oil filtering tank 1310 for filtering oil from the sewage in the oil filtering tank 1310, wherein at least one sewage inlet 1350 is disposed at a lower portion of the filtering material basket 1320, at least one sewage outlet 1360 and at least one sewage outlet 1370 are disposed at an upper portion of the filtering material basket 1320, and an outlet of the air flotation apparatus 120 is connected to the sewage inlet 1350, so that the sewage discharged from the air flotation apparatus 120 enters the fine oil filtering apparatus 130 through the filtering material basket 1320 for a third oil filtering, and is finally discharged through the sewage outlet 1360.
Preferably, the filter medium 13201 can be reused. In the first embodiment of the present invention, the filtering medium 13201 in the filtering material basket 1320 is a polymer oil absorption material 132011, and the polymer oil absorption material 132011 can be deoiled after absorbing oil and can be regenerated for multiple times of repeated use.
Further, in the first embodiment of the present invention, the polymeric oil absorbing material 132011 is deoiled by a pressure method or a vacuum method to regenerate the filter medium 13201. The skilled person in the art can select the separation method of the filter medium 13201 as required, as long as the same or similar technical solution as the present invention is adopted, the same or similar technical problem as the present invention is solved, and the same or similar technical effect as the present invention is achieved, all belong to the protection scope of the present invention, and the specific embodiments of the present invention are not limited thereto.
The de-oiling process of the filter medium 13201 according to the present invention will be briefly described with reference to fig. 3.
After entering the pressure/vacuum deoiling, the filter medium 13201 enters an extraction device, an extraction liquid is added and enters a two-phase separator to separate a solid phase and a liquid phase, wherein the solid phase enters a medium regeneration device, a gas phase and the filter medium 13201 are obtained through the medium regeneration device, and the filter medium 13201 can be reused; and the liquid phase and the gas phase enter a distillation/refining device to separate an oil phase and a liquid phase, wherein the oil phase is recovered crude oil, and the liquid phase is an extraction liquid and can be reused.
It should be noted that, in the above-mentioned deoiling process, the medium regenerating device is processed by a resetting method of heating and blowing.
Therefore, in the crude oil recovery device 10 of the present invention, the fine oil filtering device 130 is adapted to perform fine oil filtering in the oily wastewater, and can treat the oil content in the oily wastewater to be at least 1-20mg/L as required. In addition, in the fine oil filtering device 130, since a polymer material is used as the filtering medium 13201, the polymer material can be deoiled after absorbing oil, and can be regenerated after deoiling to be repeatedly used. In addition, in the first embodiment of the crude oil recovery apparatus 10 according to the present invention, the crude oil recovery apparatus 10 can recover crude oil by physical processing, and the quality of the filtered oil product is not affected.
Still further, as a further preferred aspect of the present invention, the fine oil filtering apparatus 130 further comprises at least one supporting plate 1330 which is communicated with each other up and down, the supporting plate 1330 is disposed in the oil filtering tank 1310 and disposed at a lower portion of the filter material basket 1320 for supporting the filter material basket 1320, and the sewage entering from the sewage inlet 1350 can enter the filter material basket through the supporting plate 1330.
It should be noted that the supporting plate 1330 is uniformly provided with a plurality of through holes, so that the sewage entering from the sewage inlet 1350 can uniformly enter the filter material basket 1320 through the supporting plate 1330 for filtering, thereby further improving the oil filtering effect of the filter cartridge.
Furthermore, the fine oil filtering apparatus 130 further includes at least one pre-tightening device 1340, and the pre-tightening device 1340 is movably disposed in the oil filtering tank 1310 and is disposed at the top of the filtering material basket 1320, so as to press the top of the filtering material basket 1320 to achieve a pre-tightening effect.
In the first embodiment of the present invention, the pre-tightening device 1340 is an upper pressing plate 13401, the upper pressing plate 13401 is movably disposed in the oil filter tank 1310, and can perform press-fitting pre-tightening on the top of the filter basket 1320.
Preferably, the upper pressing plate 13401 is adjusted by a hydraulic cylinder 13402, and the hydraulic cylinder 13402 is connected with the upper pressing plate 13401 by a connecting rod 13403, so as to adjust the tightness of the upper pressing plate 13401.
Alternatively, the person skilled in the art can change the hydraulic cylinder 13402 into other types of pressure elements according to the actual situation, such as selecting a pneumatic cylinder, as long as the same or similar technical solution is adopted, the same or similar technical problem as the present invention is solved, and the same or similar technical effect as the present invention is achieved, all belong to the protection scope of the present invention, and the specific embodiment of the present invention is not limited thereto.
Preferably, in the first embodiment of the present invention, the oil filter tank 1310 is vertically opened and closed, and includes an upper tank 13101 and a lower tank 13102, and the upper tank 13101 and the lower tank 13102 are movably connected.
In the first embodiment of the present invention, the fine oil filtering device 130 can treat the oil content in the sewage to 1-20 mg/L.
The working principle of the refining apparatus is further explained below.
Firstly, opening the upper tank 13101 of the oil filter tank 1310, taking out the pre-tightening device 1340 consisting of the upper pressure plate 13401, the hydraulic cylinder or pneumatic cylinder and the connecting rod 13403, then putting a filter medium 13201 (namely the high polymer oil absorption material 132011) into the filter material basket 1320, putting the filter material basket 1320 into the oil filter tank 1310, finally putting the pre-tightening device 1340, covering the upper tank 13101 and tightly connecting the upper tank 13101 with the lower tank 13102;
then the pre-tightening device 1340 is adjusted to start working after the set tightness is reached;
at this time, the sewage enters the oil filter tank 1310 from the sewage inlet 1350 at the lower part of the oil filter tank 1310, passes through the filter basket 1320 and then comes out from the outlet at the upper part of the oil filter tank 1310, and thus the fine oil filtering process is completed.
When the filtering medium 13201 (i.e. the polymer oil absorbing material 132011) in the filtering material basket 1320 is full of oil, the filtering material basket 1320 in the oil filtering tank 1310 is taken out and put into a regeneration device for regeneration and repeated use.
As shown in tables 1 to 7, the fine oil filtering device 130 of the present invention is used for treating the sewage.
Furthermore, the utility model discloses further provide a crude oil recovery method of ASP flooding oil recovery waste water 100, as shown in FIG. 4, through crude oil recovery unit 10 retrieves the oil recovery waste water 100 of oil field extraction, the crude oil recovery method includes following step:
1001: sampling and testing the oil-displacement wastewater 100 to obtain the oil content, suspended matters, pH value, polymer concentration and alkali content in the oil-displacement wastewater 100 sample;
1002: preparing the components and the adding amount of the composite treating agent 150 according to the component values in the oil wastewater 100 sample;
1003: the oil wastewater 100 is uniformly mixed with the added composite treating agent through a pipeline mixer 140;
1004: the sewage after passing through the pipeline mixer 140 enters the comprehensive treatment device 110, the O/W water system emulsion is demulsified under the action of a cavitation effect, and meanwhile, pollutants such as oil substances, surfactants and the like float on the water surface along with bubbles generated by the aeration device, so that crude oil recovery for the first time and suspended solid removal are carried out;
1005: the sewage treated by the comprehensive treatment device 110 enters the air floatation device 120 for further oil-water separation treatment and removal of suspended matters, so that the secondary crude oil recovery is achieved;
1006: the sewage treated by the air flotation device 120 enters the fine oil filtering device 130, so that the crude oil is recovered for the third time.
Preferably, the composite treating agent 150 can perform demulsification, oil removal flotation, and micro-flocculation.
Alternatively, the composite treatment agent 150 is a mixture of a demulsifier, an oil removal flotation agent, and a micro-flocculant.
Further, in step 1004, the bottom of the integrated processing device 110 is provided with at least one aeration device and at least one ultrasonic device, and the top of the integrated processing device 110 is provided with an oil receiving tank, and the oil receiving tank comprises at least one oil scraping device, so as to thoroughly collect the first recovered crude oil.
The aeration device has an air oxidation function and a stirring and mixing function, so that the composite treating agent 150 and the ternary composite flooding sewage can be more fully and uniformly mixed and subjected to micro-oxidation reaction. The ultrasonic device can break the emulsion and catalyze the reaction speed of the composite treating agent 150 and the sewage, so that the using amount of the composite treating agent 150 is reduced.
In the step 1005, the flotation device 120 is a micro-nano flotation device 120, ultra-micro bubbles are generated by a special water-vapor mixing pump, suspended matters and suspended oil in sewage are gathered and float up to the surface to be separated by a release device, and the suspended matters and the suspended oil are collected by the oil scraping device and the oil receiving tank.
In the first embodiment of the present invention, the precision filter 160 is configured as a precision bag filter, as a variation of the first embodiment of the present invention, the precision filter 160 can also select other types of filters as required, such as a high efficiency filter material filter or a membrane filter, and the problem of viscosity of the filtered water and the problem of particle size of the suspended matter to be intercepted are mainly considered when selecting the precision filter 160.
In other words, as long as the technical solution that is the same as or similar to the present invention is adopted by the person skilled in the art on the basis of the present invention, the technical problem that is the same as or similar to the present invention is solved, and the technical effect that is the same as or similar to the present invention is achieved, all belong to the protection scope of the present invention, the specific embodiment of the present invention is not limited to this.
To sum up, the crude oil recovery method pass through the ultrasonic device with aeration equipment's combination, and with the matching of combined treatment agent 150 to produced "cavitation effect", accelerated the breakdown of emulsion efficiency and the ability such as decoloration deoiling among the sewage treatment process, more importantly crude oil recovery method's whole in-process, can not produce new precipitate to avoid new pollution, also avoided the treatment cost to new products.
Further, as a further improvement of the first embodiment of the crude oil recovery method of the present invention, the crude oil recovery method further comprises the steps of:
1007: the sewage treated by the fine oil filtering device 130 enters the fine filter 160 to further remove suspended matters in the sewage, so that the final effluent reaches the standard of oilfield reinjection water.
In the step 1007, the precision filter 160 is used to remove suspended matters, and the particle size of the suspended matters that can be intercepted by the precision filter 160 is less than or equal to 0.49 um.
Next, a specific application of the method for recovering crude oil from the ASP flooding oil recovery wastewater 100 and the crude oil recovery device 10 thereof according to the present invention will be illustrated.
Example 1
The test is carried out on the external oil wastewater 100 of a certain sewage treatment station of the second oil production plant of the Daqing oilfield.
Firstly, sampling and testing the oil wastewater 100 to obtain water inlet parameters as shown in the following table 1:
oil content Content of suspended matter Concentration of Polymer pH value
1952.0mg/L 1112.0mg/L 742.2mg/L 8.9
TABLE 1
Treatment capacity: continuous equipment Q1.6 ton/hr;
preparing a composite treating agent 150:
the unit proportions are as follows by weight 2:
demulsifier (%) Oil-removing flotation agent (%) Micro flocculant (%) Water (%)
3.5 4.3 1.2 91
TABLE 2
Mixing and stirring the prepared composite treating agent 150 for 30 minutes to obtain the composite treating agent 150;
adding 1505-10ml/L of the composite treating agent into the ternary composite flooding oil wastewater 100 through the pipeline mixer 140, and fully mixing;
the sewage after the composite treatment agent 150 is added through the pipeline mixer 140 enters the comprehensive treatment device 110, the aeration devices and the ultrasonic devices are uniformly arranged at the bottom of the comprehensive treatment device 110 at intervals, a large amount of bubbles released by the aeration devices and ultrasonic waves emitted by the ultrasonic devices are utilized and matched with the composite treatment agent 150, so that a 'cavitation effect' is generated, after a series of reactions of demulsification, micro-oxidation, decoloration and micro-flocculation can be carried out on the sewage produced by the ternary complex flooding, pollutants such as oil substances, surfactants and the like in the oil wastewater 100 produced by the oil field are carried out with bubbles floating up and are taken out of a water body, and the primary crude oil recovery is carried out (wherein the aeration time of the aeration devices is 20-120min, and the parameter of the ultrasonic devices is f-20 KHz);
the sewage treated by the comprehensive treatment device 110 enters the air floatation device 120 for further oil-water separation and suspended matter treatment, so that the secondary crude oil recovery is realized;
the sewage treated by the air flotation device 120 enters the fine oil filtering device 130 for a third crude oil recovery treatment, and after the adsorption of the polymer oil absorption material 132011 is saturated, the polymer oil absorption material 132011 can be regenerated by special equipment, so that the polymer oil absorption material 132011 can be used repeatedly;
the sewage treated by the fine oil filtering device 130 enters the fine filtering device to further treat suspended matters, so that the intermediate diameter of suspended matter particles in the sewage is less than or equal to 0.49 um.
Utilize the crude oil recovery method and recovery unit thereof to retrieve the oil wastewater 100 of ASP flooding through the above-mentioned step, the result that obtains is as following table 3:
oil content Content of suspended matter Concentration of Polymer pH value
12.3mg/L 18.6mg/L 713.4mg/L 9.4
TABLE 3
Thus, it can be seen that:
1. the crude oil after recovery processing is detected by related departments of Daqing oil fields and is consistent with the components of the three-phase separated crude oil at the front end of the produced liquid, so the crude oil recovery method and the recovery device thereof adopted by the utility model have no influence on the quality of the crude oil;
2. the oil content and the suspended matter content of the recovered and treated effluent reach the double 20mg/L index requirement of oilfield reinjection water;
3. the concentration change rate of the polymer after the recovery treatment is (742.2-713.4)/742.2 × 100% ═ 3.88%, the concentration change is small, and the concentration change can be caused by that the composite treatment agent 150 has a certain viscosity reduction effect on the polymer and generates micro flocculation;
4. the pH value is changed to 9.4-8.9-0.5, the change is not large, and the change is caused by the precipitation of trace gas in the sewage in the process of 'cavitation effect';
5. no precipitate or other material was found to be produced during the entire treatment, thereby further illustrating that the polymer and base in the wastewater were not substantially changed during the recovery treatment;
6. and (3) crude oil recovery rate: (1952.0-12.3)/1952.0 × 100% ═ 99.37%, crude recovery was particularly high.
Example 2
Aiming at the sewage treatment of a certain gathering and transportation station of an oil production plant at the estuary of the victory oil field, the sewage is polymer flooding oil production sewage, and the incoming water is sewage after three-phase separation.
The incoming water was first sampled and tested, and the test results are shown in table 4 below:
oil content Content of suspended matter Concentration of Polymer pH value
2634.6mg/L 508.0mg/L 458.6mg/L 7.1
TABLE 4
Then preparing a composite treating agent 150, and mixing the components according to the weight, as shown in the following table 5:
demulsifier (%) Micro flocculant (%) Water (%)
3.2 0.88 95.95
TABLE 5
Mixing and stirring the components in the ratio for 30 minutes to obtain a composite treating agent 150;
adding 1505-10ml/L of the prepared composite treating agent into the polymer flooding sewage through the pipeline mixer 140, and fully mixing;
the sewage mixed by the pipeline mixer 140 enters the comprehensive treatment device 110 to be treated by the cavitation effect (as described in the embodiment 1), and the aeration time is 10-60 min;
the sewage treated by the comprehensive treatment device 110 enters the air floatation device 120 for further oil-water separation and suspended matter treatment, so that the secondary crude oil recovery is realized;
the sewage treated by the air flotation device 120 enters the fine oil filtering device 130 for a third crude oil recovery treatment, and after the adsorption of the polymer oil absorption material 132011 is saturated, the polymer oil absorption material 132011 can be regenerated by special equipment, so that the polymer oil absorption material 132011 can be used repeatedly;
the sewage treated by the fine oil filtering device 130 enters the fine filtering device to further treat suspended matters, so that the intermediate diameter of suspended matter particles in the sewage is less than or equal to 0.49 um.
After the crude oil recovery method and the recovery device thereof recover the oil wastewater 100 produced by the polymer flooding through the steps, the obtained results are as follows 6:
TABLE 6
From this, the crude oil recovery rate was: (2634.6-8.6)/2634.6 × 100% ═ 99.67%.
Example 3
The method is used for treating the water outside the station of a certain oily sewage station in a second oil production plant of the Daqing oil field and sending the water to a national professional detection mechanism 'Daqing Petroleum administration environmental detection center' for inspection.
Different from the example 1, the compound treating agent 150 added in the example 3 is 2-6ml/L, and the data before and after the recovery treatment are shown in the following table 7:
oil content (mg/L)
Running water 273mg/L
Treated water 0.56
TABLE 7
From this, the crude oil recovery rate in example 3 is:
(273-0.56)/273 x 100% ═ 99.795, and no precipitate was produced in the process.
In conclusion, through the method for recovering crude oil from ASP flooding wastewater 100 of the present invention, not only the recovery rate of crude oil can reach more than 99%, but also the crude oil is recovered through physical means, only demulsification and oil removal are completed, and crude oil is recovered for three times, so that no impression is generated on the quality of crude oil, and no precipitation or other substances are generated during the recovery process, thereby avoiding the cost of processing the generated substances. Furthermore, as can be seen from the above, the crude oil recovery method and recovery device for ASP flooding wastewater 100 according to the present invention can recover crude oil without affecting the polymer and alkali of crude oil in the wastewater 100, so that the cost of the next ASP flooding can be reduced.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (8)

1. The device is characterized in that the crude oil recovery device comprises at least one comprehensive treatment device, at least one air flotation device, at least one fine oil filtering device and at least one fine filter, wherein the front section of the comprehensive treatment device is communicated with a pipeline mixer, a composite treatment agent is added through the pipeline mixer, and the crude oil recovery device further comprises at least one oil collecting tank which is respectively connected with the comprehensive treatment device, the air flotation device and the fine oil filtering device so as to collect and store crude oil collected by the comprehensive treatment device, the air flotation device and the fine oil filtering device.
2. The ASP flooding oil recovery wastewater treatment and crude oil recovery device according to claim 1, wherein the fine oil filtering device comprises at least one oil filtering tank body and a filtering material basket movably disposed in the oil filtering tank body, a filtering medium is disposed in the filtering material basket for filtering the sewage in the oil filtering tank body, wherein at least one sewage inlet is disposed at a lower portion of the filtering material basket and communicated with the air flotation device, and at least one sewage outlet is disposed at an upper portion of the filtering material basket, so that the sewage passing through the filtering material basket is discharged through the sewage outlet.
3. The ASP flooding oil-recovery wastewater treatment and crude oil recovery device according to claim 2, wherein the filter medium is a polymer oil absorption material.
4. The ASP flooding oil recovery wastewater treatment and crude oil recovery device according to claim 3, wherein the fine oil filter device further comprises at least one support plate which is communicated up and down, the support plate is arranged in the oil filter tank body and arranged at the lower part of the filter basket for supporting the filter basket.
5. The ASP flooding oil-extraction wastewater treatment and crude oil recovery device according to claim 4, wherein the support plate is uniformly provided with a plurality of small holes therethrough, so that the sewage entering from the sewage inlet can uniformly pass through the support plate and enter the filter basket for filtering.
6. The ASP flooding wastewater treatment and crude oil recovery unit of claim 5, wherein the fine oil filter unit further comprises at least one pre-tensioning unit movably disposed within the oil filter tank and disposed on top of the filter basket for pre-tensioning.
7. The ASP flooding oil recovery wastewater treatment and crude oil recovery device according to claim 6, wherein the pre-tensioning device is an upper pressure plate movably disposed in the oil filter tank body and disposed on the top of the filter material basket.
8. The ASP flooding oil recovery wastewater treatment and crude oil recovery device according to claim 7, wherein the pre-tensioning device further comprises at least one hydraulic/pneumatic cylinder and at least one connecting rod, the connecting rod connects the hydraulic/pneumatic cylinder and the upper platen, so that the pressure of the upper platen is adjusted by the hydraulic/pneumatic cylinder.
CN201920011166.1U 2019-01-04 2019-01-04 Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device Active CN209940658U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920011166.1U CN209940658U (en) 2019-01-04 2019-01-04 Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920011166.1U CN209940658U (en) 2019-01-04 2019-01-04 Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device

Publications (1)

Publication Number Publication Date
CN209940658U true CN209940658U (en) 2020-01-14

Family

ID=69119622

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920011166.1U Active CN209940658U (en) 2019-01-04 2019-01-04 Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device

Country Status (1)

Country Link
CN (1) CN209940658U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111362353A (en) * 2020-03-16 2020-07-03 江苏欧沃泉环保科技有限公司 Continuous type oil field binary and ternary drive production sewage treatment system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111362353A (en) * 2020-03-16 2020-07-03 江苏欧沃泉环保科技有限公司 Continuous type oil field binary and ternary drive production sewage treatment system

Similar Documents

Publication Publication Date Title
CN104926021B (en) Phenol ammonia waste water processing unit
CN102887596B (en) Method and device for treating oil-containing emulsified wastewater or waste emulsion
CN110282767B (en) Advanced treatment method and system for solid-oil-containing low-concentration heavy metal wastewater
WO2020098193A1 (en) Oily sewage pretreatment method and device without air flotation
CN209940658U (en) Ternary combination flooding oil extraction wastewater treatment and crude oil recovery device
CN102531291A (en) Standard discharge treatment system for rock debris wastewater
CN108911260A (en) A kind of waste emulsified mixture treatment process
CN108862747A (en) Wastewater treatment and solids recovery system
CN206188537U (en) Preliminary treatment adds multistage dull and stereotyped ceramic membrane oiliness effluent disposal system
CN109553221A (en) A kind of processing of alkaline surfactant polymer flooding oil-field wastewater and crude oil recovery process and its recyclable device
CN104649481B (en) A kind of equipment for processing waste emulsified mixture
JP4151005B2 (en) Oil-water separator and oil-water separation method
CN106045088B (en) A kind of joint multi-grade oil laden water separation process
CN202785887U (en) Three-compound combination flooding oily sewage treatment device
CN108373213A (en) A kind of secondary precipitation of Heihe road and biochemical treatment apparatus
CN112028356A (en) Emulsified oil, concentrated solution and treatment method of high-water-content hydraulic fluid mixed waste liquid for hydraulic support
CN209835815U (en) Bilge oil-water recovery processing system
CN107129111B (en) Physical method oil field water treatment standard-reaching device and treatment process
CN109160635A (en) A kind of rare earth processing industry wastewater treatment key method
CN208532428U (en) A kind of process system to the demulsification of sewage containing oil emulsion
CN216513314U (en) Lathe oil-water separation system
CN202654754U (en) Filtration type oil-water separation equipment
CN208008510U (en) A kind of oily-water seperating equipment
CN112960788B (en) Process for recycling and treating ship oil-containing washing tank wastewater
CN210481098U (en) Oil field ASP flooding and polymer injection sewage physical treatment device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant