CN113265269B - Deasphalting apparatus and process - Google Patents
Deasphalting apparatus and process Download PDFInfo
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- CN113265269B CN113265269B CN202110741284.XA CN202110741284A CN113265269B CN 113265269 B CN113265269 B CN 113265269B CN 202110741284 A CN202110741284 A CN 202110741284A CN 113265269 B CN113265269 B CN 113265269B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G32/00—Refining of hydrocarbon oils by electric or magnetic means, by irradiation, or by using microorganisms
- C10G32/02—Refining of hydrocarbon oils by electric or magnetic means, by irradiation, or by using microorganisms by electric or magnetic means
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/205—Metal content
- C10G2300/206—Asphaltenes
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to the technical field of petroleum processing, and provides a deasphalting device and a deasphalting method. The deasphalting method adopts the deasphalting device provided by the invention to perform deasphalting treatment, and the method and the device have good effect of removing the asphalt in the raw oil.
Description
Technical Field
The invention relates to the technical field of petroleum processing, in particular to a deasphalting device and a deasphalting method.
Background
Petroleum asphaltenes are heavy components of crude oil and can adversely affect the processing of crude oil due to their large molecular weight and complex structure. In petroleum refining, on the one hand, asphaltenes are not easily pyrolyzed, and on the other hand, the cracked products of asphaltenes are easily condensed, resulting in the formation of a large amount of coke. In addition, most metals in crude oil are present in polar components such as asphaltenes, and these metal components can cause poisoning and deactivation of the catalyst during secondary processing. Therefore, the removal of heavy components such as asphaltene and the like can optimize the processing technology of the crude oil and improve the processing and utilization value of the crude oil.
At present, much research has been carried out on the raw oil deasphalting, most of which adopts a solvent extraction method to remove asphaltenes in the raw materials, and more successful is a solvent deasphalting technology for residual oil. In industry, the residual oil solvent deasphalting industrial application of C3 (propane), C4 (butane) and mixed solvent thereof is realized, such as ROSE process, DEMEX process and the like which are mainly widely applied. The principle of the solvent deasphalting process is that the balance system of the residual oil is broken based on the different solubility of different components in the crude oil in the solvent, so that heavy components such as asphaltene in the residual oil are separated out from the residual oil, and the separation of the heavy components is realized in a deasphalting tower through natural sedimentation. Most of deasphalting towers are empty towers (such as DEMEX process) or certain fillers are filled in the empty towers (such as ROSE process), so that the problems of low separation efficiency, easy backmixing of heavy components such as asphaltene and the like caused by process condition fluctuation and the like exist.
In view of this, the present application is specifically made.
Disclosure of Invention
The object of the present invention includes, for example, providing a deasphalting apparatus and method which have a better deasphalting effect.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a deasphalting device, which comprises a tank body, a feeding distributor, a power line and a hollow cylindrical electrode, wherein the hollow cylindrical electrode is arranged in the tank body, the feeding distributor comprises a discharge section and a conveying section which are connected with each other, the discharge section is positioned in the hollow cylindrical electrode, the conveying section extends out of the tank body from the lower part of the tank body, a plurality of discharge holes are formed in the discharge section corresponding to the lower part of the hollow cylindrical electrode, the hollow cylindrical electrode is not in contact with the wall surface of the tank body and the feeding distributor, one end of the power line is connected with the hollow cylindrical electrode, and the other end of the power line extends out of the tank body.
In an alternative embodiment, the hollow cylindrical electrode is in the shape of a grid.
In an alternative embodiment, the deasphalting apparatus further comprises at least two sets of electrode supporting members made of an insulating material for fixing the electrodes inside the tank, each set of electrode supporting members being connected to the inner wall of the tank and to the hollow cylindrical electrode.
In an optional embodiment, the number of the electrode supporting pieces is two, the two electrode supporting pieces are respectively arranged at the upper end and the lower end of the hollow columnar electrode, each electrode supporting piece comprises at least a plurality of supporting columns, the supporting columns are distributed along the circumferential direction of the hollow columnar electrode, one end of each supporting column is connected with the hollow columnar electrode, and the other end of each supporting column is connected with the inner wall of the tank body;
preferably, the plurality of support columns are uniformly distributed along the circumferential direction of the hollow cylindrical electrode.
In an optional embodiment, the discharge section is a pipe with the extension direction the same as the length direction of the hollow columnar electrode, and a plurality of discharge holes are distributed in the circumferential direction and the length direction of the discharge section;
preferably, a plurality of discharge openings evenly distributed in the circumference and the length direction of ejection of compact section.
In an optional embodiment, a deasphalted oil outlet is formed in the top of the tank body, and a filtering filler layer is arranged between the deasphalted oil outlet and the hollow cylindrical electrode.
In an optional embodiment, the deasphalting device further comprises a high-voltage power supply unit, the high-voltage power supply unit is located outside the tank body, and the high-voltage power supply unit is connected with a power line.
In an alternative embodiment, the tank, the hollow cylindrical electrode and the discharge section are coaxially arranged.
In a second aspect, the present invention provides a deasphalting method using the deasphalting apparatus according to any one of the preceding embodiments, comprising:
introducing the raw materials into the tank body from the conveying section;
the hollow columnar electrode is electrified, the tank body and the feeding distributor are grounded, and electric fields are formed between the tank body and the hollow columnar electrode and between the hollow columnar electrode and the discharging section.
In an alternative embodiment, the raw material comprises raw oil and a solvent, the raw material comprises at least one of crude oil, atmospheric residuum and vacuum residuum, and the solvent comprises one or a mixture of more of various hydrocarbon solvents of C3-C8, naphtha and gasoline;
preferably, the solvent is selected from at least one of propane, butane, pentane and hexane;
preferably, the temperature of the raw materials is 90-160 ℃;
preferably, the solvent is C3 solvent, and the temperature of the raw material is 90-95 ℃;
preferably, the solvent is C4 or above, and the temperature of the raw material is 130-160 ℃;
preferably, the electric field intensity is 500-3000V/cm; more preferably 500 to 1000V/cm.
The embodiment of the invention has the beneficial effects that:
according to the device provided by the embodiment of the invention, the discharge section of the feeding distributor is arranged in the hollow columnar electrode, so that the raw material can rapidly enter an electric field area, and polar components such as asphaltene in the raw material are rapidly agglomerated and grown under the action of the electric field; meanwhile, the back mixing of heavy matters such as the agglomerated asphaltene and the like in the sedimentation process is weakened, and the asphaltene removal efficiency is improved. The device has simple structure and convenient operation, and is suitable for long-period operation.
According to the method provided by the embodiment of the invention, as the device provided by the embodiment of the invention is adopted for carrying out the deasphalting treatment, the removal efficiency of the asphaltene is higher. Electric fields are formed between the tank body and the hollow columnar electrode and between the hollow columnar electrode and the discharging section, so that the electric fields can be completely covered in the discharging area of the tank body, polar components such as asphaltene in the raw materials are fully polarized, coalesced and grown, and the settling power of the components is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a deasphalting apparatus provided in an embodiment of the present application;
FIG. 2 is a schematic view of a first structure of the hollow cylindrical electrode shown in FIG. 1;
FIG. 3 is a second schematic view of the hollow cylindrical electrode shown in FIG. 1;
FIG. 4 is a cross-sectional rear view of the device of FIG. 1 at the insulative sleeve;
FIG. 5 is a schematic cross-sectional rear view of the apparatus of FIG. 1 at the middle of the outfeed section;
FIG. 6 is a cross-sectional rear view of the device of FIG. 1 at a delivery section;
FIG. 7 is a cross-sectional view of the discharge section of FIG. 1 with a discharge opening;
FIG. 8 is a schematic diagram showing the comparison between the electric field generated by the arrangement of the deasphalting apparatus and the electric field generated by the intermediate axially arranged electrode according to the embodiment of the present application.
Icon: 100-a deasphalting unit; 110-a tank body; 111-deasphalted oil outlet; 112-asphaltene outlet; 120-a feed distributor; 121-a conveying section; 122-a discharging section; 123-discharge hole; 130-hollow cylindrical electrodes; 140-an electrode support; 141-support columns; 150-a layer of filter packing; 160-high voltage power supply unit; 161-insulating sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1 to 6, an embodiment of the present invention provides a deasphalting apparatus 100, including a tank 110, a feeding distributor 120, a power line, and a hollow cylindrical electrode 130, where the hollow cylindrical electrode 130 is disposed in the tank 110, the feeding distributor 120 includes a discharging section 122 and a conveying section 121 connected to each other, the discharging section 122 is disposed in the hollow cylindrical electrode 130, the conveying section 121 extends from a lower portion of the tank 110 to an outside of the tank 110, a plurality of discharging holes 123 are disposed on the discharging section 122 corresponding to a lower portion of the hollow cylindrical electrode 130, the hollow cylindrical electrode 130 is not in contact with a wall surface of the tank 110 and the feeding distributor 120, one end of the power line is connected to the hollow cylindrical electrode 130, and the other end extends to the outside of the tank 110.
The embodiment of the invention also provides a deasphalting method, which adopts the deasphalting device 100 provided by the embodiment to perform deasphalting treatment. The method comprises the following steps:
introducing the raw materials into the tank 110 from the conveying section 121;
the hollow cylindrical electrode 130 is electrified, the tank 110 and the feeding distributor are grounded, so that electric fields are formed between the tank 110 and the hollow cylindrical electrode 130 and between the hollow cylindrical electrode 130 and the discharging section 122.
After the raw material enters the tank body 110 from the conveying section 121, under the action of the electric field, the asphaltenes move, coalesce, grow up and settle in the electric field and are collected at the bottom of the tank body 110, deasphalted light oil is discharged from a deasphalted oil outlet 111 arranged at the top of the tank body 110, and the collected asphaltenes are discharged from an asphaltene outlet 112 arranged at the bottom of the tank body 110.
According to the device provided by the embodiment of the invention, the discharge section 122 of the feeding distributor 120 is arranged in the hollow cylindrical electrode 130, so that the raw material can rapidly enter an electric field area, and the polar components such as asphaltene in the raw material are rapidly agglomerated and grow up under the action of the electric field; meanwhile, the back mixing of heavy matters such as aggregated asphaltene in the sedimentation process is weakened, and the asphaltene removal efficiency is improved.
According to the method provided by the embodiment of the invention, as the device provided by the embodiment of the invention is adopted for carrying out the deasphalting treatment, the removal efficiency of the asphaltene is higher. Electric fields are formed between the tank body 110 and the hollow cylindrical electrode 130 and between the hollow cylindrical electrode 130 and the discharging section 122, so that the electric fields can be completely covered in the discharging area of the tank body 110, polar components such as asphaltene in the raw materials are fully polarized and coalesced to grow, and the settling power of the components is increased.
As shown in fig. 8, in the present application, the hollow cylindrical electrode is used instead of the central axial electrode, for the following reasons:
1. the central axial installation of the electrodes results in a higher output voltage of the required power supply equipment for obtaining the same electric field strength. By adopting the electrode provided by the application, the load of the power supply equipment can be effectively reduced. Because in this application it is by means of an electric field formed between the hollow cylindrical electrode and the wall of the tank and the feed distributor. The centrally arranged electrode, however, only forms an electric field between the electrode and the wall of the tank. Therefore, in the case of the same inner diameter of the apparatus, the same electric field intensity is obtained, the electrode is centrally disposed, the voltage to be applied is higher than that of the ring electrode, and therefore the power consumption is high.
2. Through the feeding distributor that sets up central feeding, can let the raw oil mixture that gets into the electric field realize the coalescence of asphaltene, subside in the electric field, prevent that raw material mixture from rising the in-process, because of its backmixing of subsiding asphaltene, weaken the backmixing phenomenon, improve separation efficiency. And the electrode is arranged at the center, the raw materials enter the tank from the bottom, and asphaltene can be influenced by ascending material flow in the sedimentation process to cause back mixing of the sedimentary materials. Through the feed mode that this application clearly provided, the asphaltene coalescence is behind the large granule, can directly subside, and clean commodity circulation upwards walks, and the heavy ends downwards walks, weakens the back mixing of heavy ends as far as, consequently can improve separation efficiency.
Preferably, the deasphalting apparatus 100 further comprises a high voltage power supply unit 160, the high voltage power supply unit 160 is located outside the tank 110, and the high voltage power supply unit 160 is connected to a power line.
The high voltage power supply unit 160 provides a high voltage power to the device to generate a high voltage electric field.
Further, the deasphalting apparatus 100 further comprises an insulating sleeve 161, the insulating sleeve 161 is sleeved outside the power line, one end of the insulating sleeve 161 is connected to the hollow cylindrical electrode 130, and the other end of the insulating sleeve 161 extends out of the tank 110 and is connected to the high voltage power supply unit 160.
Preferably, the can 110, the hollow cylindrical electrode 130, and the discharge section 122 are coaxially disposed.
The coaxial arrangement of the tank 110, the hollow cylindrical electrode 130 and the discharge section 122 can make the discharge distribution more uniform, the electric field distribution more uniform, and the electric field action intensity of the raw material particles more uniform.
Preferably, as shown in fig. 2 and 3, the hollow cylindrical electrode 130 has a grid shape.
The grid-shaped design is beneficial to the raw materials discharged from the discharge holes 123 to be distributed in an electric field formed in the hollow cylindrical electrode 130, and the holes can be punched to enter the electric field formed between the hollow cylindrical electrode 130 and the tank wall, so that the deasphalting process can be more efficiently and more fully realized.
Further, as shown in fig. 4 and 5, the deasphalting apparatus 100 further includes at least two sets of electrode supporting members 140 made of an insulating material for fixing the electrodes inside the can 110, and each set of electrode supporting members 140 is connected to the inner wall of the can 110 and to the hollow cylindrical electrode 130.
The hollow cylindrical electrode 130 is disposed in the can 110 without contacting the can wall by the electrode support 140.
Specifically, the number of the electrode supporting members 140 is two, which are respectively disposed at the upper end and the lower end of the hollow cylindrical electrode 130, each group of the electrode supporting members 140 includes at least a plurality of supporting columns 141, the plurality of supporting columns 141 are distributed along the circumferential direction of the hollow cylindrical electrode 130, one end of each supporting column 141 is connected to the hollow cylindrical electrode 130, and the other end is connected to the inner wall of the tank 110.
Preferably, in order to ensure that each supporting column 141 is sufficiently stressed to improve the stability of the device, the supporting columns 141 are uniformly distributed along the circumferential direction of the hollow cylindrical electrode 130.
Preferably, as shown in fig. 1 and 7, the discharging section 122 is a pipe having the same extending direction as the length direction of the hollow cylindrical electrode 130, and the plurality of discharging holes 123 are distributed in the circumferential direction and the length direction of the discharging section 122.
In the present embodiment, the specific structure of the raw material distributor is "L" shaped, the discharging section 122 is vertically disposed in the hollow cylindrical electrode 130, the upper region thereof is closed, and the lower region thereof is provided with the discharging hole 123.
The above-mentioned specific arrangement of the discharging section 122 makes the raw materials distributed in the circumferential direction and the length direction of the discharging section 122 after being discharged from the tank 110, so that the problem of too concentrated discharging can be avoided.
Further, in order to ensure that the raw materials can be uniformly distributed in the electric field, the plurality of discharge holes 123 are uniformly distributed in the circumferential direction and the length direction of the discharge section 122.
Preferably, the top of the tank 110 is provided with a deasphalted oil outlet 111, and a filtering filler layer 150 is disposed between the deasphalted oil outlet and the hollow cylindrical electrode 130.
The filter packing layer 150 is arranged to realize the repurification of the deasphalted oil, prevent the back mixing of heavy components caused by the fluctuation of technological operation conditions and improve the stability of the operation of the device.
Preferably, the deasphalted raw material comprises raw oil and solvent, the raw oil comprises at least one of crude oil, atmospheric residuum and vacuum residuum, and the solvent comprises one or more of C3-C8 hydrocarbon solvents, naphtha and gasoline.
Preferably, the solvent is selected from at least one of propane, butane, pentane and hexane.
Preferably, the raw materials before entering the deasphalting device 100, its temperature rise to suitable within range can make the deasphalting effect better, consequently, the raw materials are raw materials after raw oil and the heat transfer of solvent mixture in this application, and its temperature is 90 ~ 160 ℃.
Preferably, the solvent is C3 solvent, and the temperature of the raw material is 90-95 ℃.
Preferably, the solvent is C4 or above, and the temperature of the raw materials is 130-160 ℃.
Preferably, in order to obtain a good deasphalting effect, the electric field intensity is 500-3000V/cm; more preferably 500 to 1000V/cm.
The deasphalting process provided herein is specifically illustrated below by specific examples.
Example 1
A crude oil is selected having an asphaltene content of 2%. The crude oil and n-pentane are mixed in a mass ratio of 1:1.5 to form a homogeneous mixture, which is then heated to 150 ℃ and passed into the deasphalting unit 100 via the conveying section 121 of the feed distributor 120. The residence time of the mixture in the deasphalting unit 100 was 15 minutes. The electric field strength applied was 1500V/cm.
Example 2
A residue was selected having an asphaltene content of 17%. The residual oil and n-heptane are mixed in a mass ratio of 1:2 to form a homogeneous mixture, which is then heated to 150 ℃ and passed into the deasphalting unit 100 via the transport section 121 of the feed distributor 120. The residence time of the mixture in the deasphalting unit 100 was 15 minutes. The applied electric field strength was 1500V/cm.
Comparative example 1
A crude oil is selected having an asphaltene content of 2%. The crude oil and n-pentane are mixed in a mass ratio of 1:1.5 to form a homogeneous mixture, which is then heated to 150 ℃ and passed into the deasphalting unit 100 via the conveying section 121 of the feed distributor 120. The residence time of the mixture in the deasphalting unit 100 was 15 minutes. The applied electric field strength was 0V/cm.
Comparative example 2
A residual oil is selected, the asphaltene content of which is 17%. The residual oil and n-heptane are mixed in a mass ratio of 1:2 to form a homogeneous mixture, which is then heated to 150 ℃ and passed into the deasphalting unit 100 via the transport section 121 of the feed distributor 120. The residence time of the mixture in the deasphalting unit 100 was 15 minutes. The applied electric field strength was 0V/cm.
Examples of the experiments
The deasphalted oils obtained by the methods provided in examples 1 and 2 and comparative examples 1 and 2 were examined for asphaltene content. The results are recorded in the table below.
TABLE 1 asphaltene content in deasphalted oil for each experimental group
| Experiment of | Asphaltene content in deasphalted oil (%) |
| Example 1 | 0.05 |
| Example 2 | 0.1 |
| Comparative example 1 | 1 |
| Comparative example 2 | 5.2 |
As can be seen from the above table, the examples provided in the present application have a better effect of removing asphalt than the comparative examples, and the obtained deasphalted oil has a lower asphaltene content, and after an electric field is applied, the deasphalting efficiency of the raw oil can be improved, and more than 90% of asphaltenes in the raw oil can be removed.
In summary, the device provided by the application enables the raw material to rapidly enter the electric field area by arranging the discharge section of the distributor in the hollow cylindrical electrode, so that polar components such as asphaltene in the raw material are rapidly agglomerated and grow up under the action of the electric field; meanwhile, the back mixing of heavy matters such as the agglomerated asphaltene and the like in the sedimentation process is weakened, and the asphaltene removal efficiency is improved. The device provided by the application is simple in structure, convenient to operate and suitable for long-period operation.
The method that this application provided, owing to adopt the device that this application provided to take off the waterlogging caused by excessive rainfall and handle, the desorption efficiency of asphaltene is higher. Electric fields are formed between the tank body and the hollow columnar electrode and between the hollow columnar electrode and the discharging section, so that the electric fields can be completely covered in the discharging area of the tank body, polar components such as asphaltene in the raw materials are fully polarized, coalesced and grown, and the settling power of the components is increased.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (18)
1. A deasphalting device is characterized by comprising a tank body, a feeding distributor, a power line and a hollow cylindrical electrode capable of conducting electricity, wherein the hollow cylindrical electrode is arranged in the tank body, the feeding distributor comprises a discharge section and a conveying section which are connected with each other, the discharge section is positioned in the hollow cylindrical electrode, the conveying section extends out of the tank body from the lower part of the tank body, a plurality of discharge holes are formed in the discharge section corresponding to the lower part of the hollow cylindrical electrode, the hollow cylindrical electrode is not in contact with the wall surface of the tank body and the feeding distributor, one end of the power line is connected with the hollow cylindrical electrode, and the other end of the power line extends out of the tank body;
when the electric heating pot is used, the power line is connected with electricity, and the hollow columnar electrode and the pot body are grounded.
2. The deasphalting apparatus as claimed in claim 1, wherein the hollow cylindrical electrode is in the form of a grid.
3. The deasphalting apparatus according to claim 1, further comprising at least two sets of electrode supports made of insulating material for fixing the electrodes inside the tank, each set of electrode supports being connected to the inner wall of the tank and to the hollow cylindrical electrodes.
4. The deasphalting device according to claim 3, wherein the number of the electrode supporting members is two, and the two electrode supporting members are respectively arranged at the upper end and the lower end of the hollow cylindrical electrode, each electrode supporting member comprises at least a plurality of supporting columns, the supporting columns are distributed along the circumferential direction of the hollow cylindrical electrode, one end of each supporting column is connected with the hollow cylindrical electrode, and the other end of each supporting column is connected with the inner wall of the tank body.
5. The deasphalting apparatus of claim 4, wherein a plurality of support columns are uniformly distributed along the circumference of the hollow cylindrical electrode.
6. The deasphalting device according to claim 1, wherein the discharge section is a pipe having an extending direction the same as the length direction of the hollow cylindrical electrode, and the plurality of discharge holes are distributed in the circumferential direction and the length direction of the discharge section.
7. The deasphalting apparatus as recited in claim 6, wherein the plurality of discharge openings are uniformly distributed in the circumferential direction and the length direction of the discharge section.
8. The deasphalting apparatus as claimed in claim 1, wherein the top of the tank is provided with an outlet for deasphalted oil, and a filter packing layer is provided between the outlet for deasphalted oil and the hollow cylindrical electrode.
9. The deasphalting apparatus according to claim 1, further comprising a high voltage power supply unit located outside the tank body, said high voltage power supply unit being connected to said power line.
10. The deasphalting apparatus as claimed in claim 1, wherein the tank, the hollow cylindrical electrode and the discharge section are coaxially arranged.
11. A deasphalting method using the deasphalting apparatus according to any one of claims 1 to 10, comprising:
introducing the raw material into the tank body from the conveying section;
and electrifying the hollow columnar electrode, and grounding the tank body and the feeding distributor to form an electric field between the tank body and the hollow columnar electrode and between the hollow columnar electrode and the discharging section.
12. The deasphalting process according to claim 11, wherein the feedstock comprises a raw oil and a solvent, the feedstock comprising at least one of crude oil, atmospheric residuum and vacuum residuum, the solvent comprising a mixture of one or more of hydrocarbon solvents C3-C8, naphtha and gasoline.
13. The deasphalting process as recited in claim 12, characterized in that said solvent is chosen from at least one of propane, butane, pentane and hexane.
14. The deasphalting method according to claim 12, characterized in that the temperature of the feedstock is between 90 and 160 ℃.
15. The deasphalting method according to claim 12, characterized in that the solvent is a C3 solvent and the temperature of the raw material is 90-95 ℃.
16. The deasphalting method according to claim 12, wherein the solvent is C4 or more, and the temperature of the raw material is 130 to 160 ℃.
17. The deasphalting method according to claim 11, wherein the electric field strength is 500 to 3000V/cm.
18. The deasphalting method according to claim 17, wherein the electric field strength is 500 to 1000V/cm.
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| GB1358695A (en) * | 1971-08-05 | 1974-07-03 | Exxon Research Engineering Co | Dielectrophoretic separation process and apparatus |
| US4136014A (en) * | 1975-08-28 | 1979-01-23 | Canadian Patents & Development Limited | Method and apparatus for separation of bitumen from tar sands |
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| CN111732970A (en) * | 2020-08-06 | 2020-10-02 | 中国石油化工股份有限公司 | Process and apparatus for reducing the metal content of residual oils |
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| CN112592736A (en) * | 2020-11-27 | 2021-04-02 | 湖南汉华京电清洁能源科技有限公司 | Online solid removing method and system for catalytic slurry oil filler high-gradient electric field separation and adsorption |
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