CN103450927B - A kind of Dehydration plant for complex electric field - Google Patents
A kind of Dehydration plant for complex electric field Download PDFInfo
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- CN103450927B CN103450927B CN201310329018.1A CN201310329018A CN103450927B CN 103450927 B CN103450927 B CN 103450927B CN 201310329018 A CN201310329018 A CN 201310329018A CN 103450927 B CN103450927 B CN 103450927B
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Abstract
The invention discloses a kind of Dehydration plant for complex electric field, comprise separating tank, crude oil inlet/outlet pipe, water shoot, feed distributor, oil header and transformer, crude oil inlet/outlet pipe and water shoot are located on tank body, and feed distributor and oil header to be located in tank and to be connected with crude oil inlet/outlet pipe; Transformer is located at outside tank body; The compound electric place for being separated profit is provided with between feed distributor with oil header, described compound electric place is included in several electrode layers spaced apart on vertical direction, several electrode layers described comprise the second electrode lay of the first electrode layer that at least one and described transformer be electrically connected and at least one ground connection, at least one first electrode layer described and at least one the second electrode lay described cooperatively interact, and form at least two electric field regions arranged at vertical direction.This device can effectively realize carrying out multi-stage, efficient oily water separation to the high water-content crude oil of different moisture content, to reach its production object.
Description
Technical field
The present invention relates to crude oil upgrading field, particularly relate to high water-content crude oil oily water separation technique field, tool relates to a kind of Dehydration plant for complex electric field.
Background technology
Along with the deep development in oil field and the widespread use of tertiary oil recovery technology, heavy oil, viscous crude and super-viscous oil, peracid, high-sulfur, the output of the crude oil with poor quality such as high water content increases year by year, the utilization of these crude oil needs the pretreatment technology carrying out oily water separation usually, but in current oily water separation correlation technique, high water-content crude oil occurs that in oil water separation process dewatering efficiency is low, draining is containing innage, fluctuation of current is there is when making it enter last step apparatus for electrodewatering, electric current superelevation, the risk even tripped, have a strong impact on the long-term safety steady running of oily water separating equipment, in addition, along with increasing of water content in crude oil, its oily water separation treatment system load increases, processing efficiency reduces, be difficult to meet the current demand to high water-content crude oil oily water separation.
Current high water-content crude oil oil water separation process uses the separation process of triphase separator+thermochemistry separation+electro-dewatering usually, but the oil-water separation method of this routine exists that to be separated progression many, and equipment is numerous and jumbled, and floor space is large, and the problem such as separation efficiency is low.
For improving the separation efficiency of oily water separation, the mode applying electric field is adopted to carry out oily water separation to high water-content crude oil in practice, if publication number is disclose a kind of employing in the technical scheme of " crude oil electro-desalting dehydrator " of CN1233793C to utilize highfield coalescent district crude oil to be carried out to the technical scheme of de-electro-dewatering, to solve the employing weak electric field charging of existing electric desalting and dewatering device existence, the voltolisation effect of forceful electric power place is weakened, crude oil flows from bottom to top and causes blocking the problem of drops of water fall down, but the program directly uses highfield to carry out oily water separation, there is conduction risk and potential safety hazard greatly.The patent No. be CN201735213U patent discloses a kind of oil gas water settlement separate electro-dewatering Multifunctional three-phase tripping device, settling pocket, electro-dewatering room and hydroecium is provided with successively in separable cartridge, electro-dewatering indoor are provided with electrode plate with high voltage, this technical scheme directly adopts bare metal electrode to apply high-voltage electric field in High water cut flash trapping stage tank, make electric current raise and easily cause short circuit even to be tripped, affect tripping device safe operation.The patent No. be the patent disclosure of CN102021020A a kind of novel crude oil electro-dewatering based on dielectrophoresis Mechanismic, desalting method and equipment, vertically suspended corrugated plate shape insulated electrode is adopted to produce horizontal variation alternating-electric field, grow up and meticulous dewatering and desalting for disperse phase particle water, but in this technical scheme, there are the following problems: vertically to hang bottom pole plate with water-oil interface in " line-face " electric field, electric field region fluctuation is large, is unfavorable for that position, boundary is stable and dewater; Adopt and vertically hang corrugated plate shape insulated electrode assembly, but horizontal direction is uniform electric field viewed from whole electric field region, vertical direction electric field is " strong-weak-strong-weak-strong-weak " gradual change electric field, does not have steady and audible weak electric field region and strong electric field region, is unfavorable for dehydrating of crude oil; And only adopt single insulating electrode to be difficult to reach deep dehydration index.
To sum up, along with the development requirements such as deepwater, marginal oil field, green oilfield increase, its water content in crude oil exploiting out is more and more higher, crude oil in poor quality trend is more and more serious, and oil water separation process exists that separation efficiency is low, separating effect is not good and there is the problems such as potential safety hazard in current crude oil upgrading flow process, be difficult to meet the current demand be separated high water-content crude oil.
Summary of the invention
In order to overcome, the separation efficiency that existing oily water separation correlation technique exists is low, separating effect is not good and there is the deficiencies such as potential safety hazard, the invention provides a kind of compound field that utilizes and carries out the Dehydration plant for complex electric field of multi-stage, efficient oily water separation to the high water-content crude oil of different moisture content.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Dehydration plant for complex electric field, comprise separating tank, crude oil inlet/outlet pipe, water shoot, feed distributor, oil header and transformer, crude oil inlet/outlet pipe and water shoot are located on tank body, and feed distributor and oil header to be located in tank and to be connected with crude oil inlet/outlet pipe; Transformer is located at outside tank body; The compound electric place for being separated profit is provided with between feed distributor with oil header, described compound electric place is included in several electrode layers spaced apart on vertical direction, several electrode layers described comprise the second electrode lay of the first electrode layer that at least one and described transformer be electrically connected and at least one ground connection, at least one first electrode layer described and at least one the second electrode lay described cooperatively interact, and form at least two electric field regions arranged at vertical direction.
In Dehydration plant for complex electric field of the present invention, at least one first electrode layer described and at least one the second electrode lay described each other distance are adjustably arranged at described separating tank.
In Dehydration plant for complex electric field of the present invention, the strength of electric field of described Zhong Ge electric field region, compound electric place increases progressively from bottom to top.
In Dehydration plant for complex electric field of the present invention, at least one first electrode layer described comprises at least one bare electrode layer of being electrically connected with described transformer and at least one insulated electrode layer, and at least one bare electrode layer described and at least one insulated electrode layer described coordinate with corresponding the second electrode lay and form at least one insulated electro place and at least one naked electric field region.
In Dehydration plant for complex electric field of the present invention, described compound electric place comprises the weak insulated electro place arranged, strong insulated electro place, weak naked electric field region and strong naked electric field region from bottom to top.
In Dehydration plant for complex electric field of the present invention, at least one bare electrode layer described comprises the bare electrode of some parallel interval arrangements in the same plane, and at least one insulated electrode layer described comprises the insulated electrode of some parallel interval arrangements in the same plane.
In Dehydration plant for complex electric field of the present invention, comprise aqueous phase district described in aqueous phase district bottom described separating tank and comprise oil-water separation interface; At least one first electrode layer described comprises and described oil-water separation interface insulated electrode layer across a certain distance mutually, and this insulated electrode layer coordinates with described oil-water separation interface and forms insulated electro place.
In Dehydration plant for complex electric field of the present invention, each insulated electrode at least one described insulated electrode layer and/or each bare electrode in bare electrode layer are all fixed in separating tank by insulating suspension and/or insulating support rod; Each insulated electrode at least one described insulated electrode layer and/or each bare electrode in bare electrode layer are all interconnected and are electrically connected by airtight terminal box and transformer in airtight terminal box; Described transformer provides AC power, DC pulse or alternating-current pulse to insulated electrode and/or bare electrode.
In Dehydration plant for complex electric field of the present invention, electrode layer described in each comprises the electrode of some parallel interval arrangements in the same plane.
In Dehydration plant for complex electric field of the present invention, described crude oil inlet/outlet pipe comprise be located at tank base vertically arrange or both ends horizontal arrange oil inlet pipe and be located at tank body top vertical arrange or both ends horizontal arrange oil outlet pipe, described feed distributor is connected with oil inlet pipe and is positioned at the middle and lower part of separating tank, described oil header is connected with oil outlet pipe and is positioned at separating tank top, makes the compound electric place be arranged between feed distributor and oil header be placed in the top of separating tank.
The present invention compared with prior art tool has the following advantages: the present invention adopts compound field, single equipment is arranged effect that compound field realizes carrying out profit stage trapping, improves oily water separation efficiency, can save equipment volume simultaneously, be conducive to promoting the use.
Electrode in the present invention adopts insulated electrode layer and/or bare electrode layer to form insulation electric field and/or naked electric field, uses insulated electrode layer, can process any water content crude oil and avoid electric pole short circuit, improve device security and operation stability; Use bare electrode layer, its strength of electric field is large, is conducive to accelerating the coalescent of former water content in oil, and insulation electric field and the cooperation of naked electric field realize the object that crude oil highly effective and safe is separated.
Insulated electrode and/or use airtight terminal box to carry out wiring between bare electrode and transformer, makes its wiring seal isolation, safe and reliable, reduces the risk of electric pole short circuit.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of Dehydration plant for complex electric field of the present invention.
Fig. 2 is the electrode layer arrangement schematic diagram of the embodiment of the present invention 1.
Fig. 3 is the electrode layer arrangement schematic diagram of the embodiment of the present invention 2.
Fig. 4 is the electrode layer arrangement schematic diagram of the embodiment of the present invention 3.
Fig. 5 is the electrode layer arrangement schematic diagram of the embodiment of the present invention 4.
In figure: 1, separating tank; 2, access opening; 3, feed distributor; 4, electrode layer; 401, the first electrode layer; 402: the second electrode lay; 411: insulated electrode layer; 412, bare electrode layer; 5, electric field region: 501: insulated electro polar region; 501A: weak insulated electro place; 501B: strong insulated electro place; 502: naked electric field region; 502A: weak naked electric field region; 502B: strong apterium; 6, airtight terminal box; 7, oil header; 8, transformer; 9, insulating suspension; 10, water shoot; 11, oil inlet pipe; 12, oil outlet pipe; 13, compound electric place; 14, aqueous phase district; 14.1 oil-water separation interfaces.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, the present invention discloses a kind of Dehydration plant for complex electric field, and this dewatering unit comprises horizontal cylinder type separating tank 1, and separating tank 1 two ends are also provided with access opening 2, are convenient to pipeline maintenance.Be provided with transformer 8 outside tank body, the voltage of powered electrode in separating tank 1 can be adjusted at any time, to adjust strength of electric field.Tank base is provided with water shoot 10, for discharging the coalescent water settled down in crude oil.Tank body is also provided with crude oil inlet/outlet pipe, and crude oil inlet/outlet pipe is included in the oil inlet pipe 11 that tank base is vertically arranged or both ends horizontal is arranged and the oil outlet pipe 12 being located at the setting of tank body top vertical or both ends horizontal setting.Also comprise in separating tank 1 be connected with crude oil inlet/outlet pipe feed distributor 3, oil header 7 charging; Divider 3 is connected with oil inlet pipe 11 and is positioned at the middle and lower part of separating tank 1, oil header 7 is connected with oil outlet pipe 12 and is positioned at separating tank 1 top, the compound electric place 13 for being separated profit is provided with between feed distributor 3 with oil header 7, compound electric place 13 is placed in the top of separating tank 1, aqueous phase district 14 is provided with bottom separating tank 1, be convenient to carry out dewatering and desalting process to crude oil, avoid compound electric place 13 directly to contact with the crude oil of high-moisture simultaneously, moisture in crude oil causes the electric pole short circuit in compound field, causes potential safety hazard.
Compound electric place 13 comprises in the vertical direction several electrode layers 4 spaced apart, each electrode layer 4 comprises the electrode (not shown) of some parallel interval arrangements in the same plane, electrode in same electrode layer 4 passes into the same AC power of watt level, DC pulse or alternating-current pulse by transformer 8, makes some electrodes form the electrode layer 4 of integration.Several electrode layers 4 comprise the second electrode lay 402 of the first electrode layer 401 that at least one and transformer 8 be electrically connected and at least one ground connection, at least one the first electrode layer 401 and at least one the second electrode lay 402 cooperatively interact, form at least two electric field regions 5 arranged at vertical direction, in this programme, several electrode layer 4 in the vertical direction intervals are arranged the electric field region 5 making it form vertical direction layout, the electrical forces direction in electric field region 5 is made to be vertical direction, pass into AC power to the first electrode layer 401 by transformer 8, when DC pulse or alternating-current pulse, moisture in crude oil produces upper and lower oscillation effect under the effect of electrical forces, when the moisture vibrated up and down is coalescent be greater than electrical forces to its gravity time, carry out sedimentation, thus realize the object of oily water separation, therefore the electric field region 5 arranged up and down can utilize simultaneously the action of gravity of electrical forces and former water content in oil than correlation technique adopt horizontally disposed electric field region only adopt electrical forces carry out oily water separation separating effect better, separation efficiency is higher.
The strength of electric field of each electric field region 5 in compound electric place 13 increases progressively from bottom to top, thus protects the stage trapping that can realize in same separating tank 1 high water-content crude oil, improves oily water separation efficiency, can save equipment volume simultaneously, be conducive to promoting the use.At least one the first electrode layer 401 and at least one the second electrode lay 402 each other distance are adjustably arranged at separating tank 1, by the strength of electric field regulating the distance between the first electrode layer 401 and the second electrode lay 402 to adjust the electric field region 5 that it is formed, to realize the object to high water-content crude oil high efficiency separation.
At least one first electrode layer 401 comprises at least one bare electrode layer 412 and at least one insulated electrode layer 411 of being electrically connected with transformer 8, at least one insulated electrode layer 411 comprises the insulated electrode (not shown) of some parallel interval arrangements in the same plane, insulated electrode is non-conductive, therefore its insulated electrode layer 411 formed can process any water content crude oil and avoid electric pole short circuit, improve device security and operation stability, usually insulated electrode floor 411 is located at the position in contiguous aqueous phase district 14; At least one bare electrode layer 412 comprises the bare electrode (not shown) of some parallel interval arrangements in the same plane, bare electrode conducts electricity, therefore bare electrode floor 412 is located at the position away from aqueous phase district 14 usually when being energized, in order to avoid the moisture in crude oil causes electrode breakdown, cause potential safety hazard; The pole strength of the electrode district 5 using bare electrode layer to be formed is large, is more conducive to the oily water separation efficiency improving the minimum crude oil of water content, ensures its oil-water separation.At least one bare electrode layer 412 and at least one insulated electrode layer 411 coordinate with corresponding the second electrode lay 402 and form at least one insulated electro place 501 and at least one naked electric field region 502, the object using insulated electro place 501 and the cooperation of naked electric field region 502 more can realize crude oil highly effective and safe in this programme to be separated.At least one first electrode layer 401 comprises and the oil-water separation interface 14. phase insulated electrode floor 411 across a certain distance in aqueous phase district 14, this insulated electrode layer 411 coordinates with oil-water separation interface 14.1 and forms insulated electro place 501, oil-water separation interface 14.1 is identical with the effect that the second electrode lay 402 of ground connection produces herein, coordinated insulation electrode layer 411 forms insulated electro place 501, in order to realize oily water separation object.
Each insulated electrode in insulated electrode layer 411 and/or each bare electrode in bare electrode layer 412 are all fixed in separating tank 1 by insulating suspension 9 and/or insulating support rod (not shown), for avoiding rocking of oil tanker in offshore operation process to cause occurring the problems such as short circuit between electrode, make whole Crude Oil at Sea recovery process more safe and reliable.Each insulated electrode in insulated electrode layer 411 and/or each bare electrode in bare electrode layer 412 are all interconnected and are electrically connected with transformer 8 by airtight terminal box 6 in airtight terminal box 6, make wiring seal isolation, safe and reliable, reduce the risk of electric pole short circuit.Transformer 8 provides AC power, DC pulse or alternating-current pulse to insulated electrode 5 and/or bare electrode 4, to make moisture produce the effect of vibrating up and down in electric field region, improves the effect of crude oil oily water separation.Insulated electrode layer 411 can share a transformer 8 with the receiving electrode of bare electrode layer 412, simplifies the operation; Also independently transformer 8 can be adopted respectively to power to it, the power supply of transformer 8 pairs of insulated electrodes 5 and bare electrode 4 is regulated more flexible, relevant parameter can be adjusted in time according to the requirement of separating effect.
Each insulated electrode in insulated electrode layer 411 can be the metal hollow rod or metal bar or plate electrode that cover dense insulating layer, each bare electrode in bare electrode layer 412 can be metal hollow rod or metal bar plate electrode, preferably uses bar-shaped insulated electrode and bare electrode.Use bar-shaped insulated electrode and bare electrode, compared to tabular electroplax, can reduce and acutely rock due to oil tanker in Oil extraction process at sea the damage causing electrode.
Feed distributor 3 is uniformly distributed in aqueous phase district 14, can adopt the formula of falling Cao divider, has aperture in the surrounding of groove, is mainly used in that viscosity is large, impurity is many or heavy crude, in order to avoid prevent divider from blocking.Also can adopt pipe distributor, pipe distributes aperture, is applicable to the little and crude oil that impurity is less of viscosity and is uniformly distributed along horizontal interface in separating tank, crude oil is dispersed in aqueous phase.Can also be disc type porous distributor, be provided with multiple shower nozzle in distribution disk circumference, make crude oil be uniformly distributed in aqueous phase district 14, fully wash.
When using this device to carry out oily water separation process to high water-content crude oil, high water-content crude oil enters in separating tank 1 through the oil inlet pipe 11 being arranged on tank base and vertically arranging or both ends horizontal is arranged, and preferably enters from bottom; By feed distributor 3, crude oil is fully washed in the aqueous phase district 14 evenly spread to bottom separating tank 1 and between feed distributor 3 again, remove portion moisture, make crude oil carry out initial gross separation; Enter compound electric place 13 again, the moisture in the crude oil of 13 pairs, compound electric place carries out multi-stage agglomeration sedimentation and enters aqueous phase district 14, is discharged by moisture by the water shoot 10 of tank base; Crude oil after dehydration is discharged through the oil outlet pipe 12 that tank body is vertically arranged or both ends horizontal is arranged and is collected, thus completes and dewater to high water-content crude oil.
Compound electric place 13 comprises at least two-layer electric field region 5 in the weak insulated electro place 501A arranged, strong insulated electro place 501B, weak naked electric field region 502A and strong naked electric field region 502B from bottom to top.Insulated electro place 501 and naked electric field region 502 are that insulated electrode layer 411 or bare electrode layer 412 determine by the first electrode layer 401 be electrically connected with transformer 8.The power of electric field region 5 is determined by the power-on voltage of transformer 8 and the distance between each electrode layer 401 and the second electrode lay 402.In general, when two interelectrode distances are 200-220mm, be highfield when strength of electric field is 0.8-2.0KV/cm; When two interelectrode distances are 500-540mm, be weak electric field when strength of electric field is 0.3-0.5KV/cm.Therefore weak insulated electro place 501A, the by force electric field region 5 such as insulated electro place 501B, weak naked electric field region 502A and strong naked electric field region 502B that strength of electric field grows from weak to strong can be formed, to adapt to the multistage dehydration demand of different properties different moisture content crude oil, make full use of between limited electric field region, to reach multistage strengthen dewatering effect.
Embodiment 1: as shown in Figure 2, uses 1B in one deck insulated electrode layer 411(and figure) with 1A, 1C and 1D in three layers of bare electrode layer 412(and figure) vertically arrange formation three electric field regions 5.Specifically, the spacing arranged from bottom to top between electrode layer 4 is respectively 540mm, 200mm and 500mm.Using insulated electrode layer 1B and bare electrode layer 1D connection transformer 8 as the first electrode layer 401, bare electrode layer 1A and bare electrode layer 1C ground connection are as the second electrode lay 402, there is provided DC pulse to insulated electrode layer 1B and bare electrode layer 1D by transformer 8, and adjust service voltage, thus form that strength of electric field from bottom to top increases progressively weak insulation electric field 501A, strong insulation electric field 501B and weak naked electric field 502A.Crude oil is after aqueous phase district 14 initial gross separation bottom separating tank 1, and the weak insulation electric field 501A, the strong insulation electric field 501B and weak naked electric field 502A that increase progressively from bottom to top through strength of electric field first carry out multistage processed to it, to realize the object that highly effective and safe is separated.
Embodiment 2: as shown in Figure 3, uses 2A in one deck insulated electrode 411(and figure) with 2B and 2C in two layers of bare electrode layer 412(and figure) vertically arrange, and coordinate formation three electric field regions 5 with the oil-water separation interface 14.1 in aqueous phase district 14.Specifically, the spacing arranging insulated electrode layer 2A and oil-water separation interface 14.1 is 510mm, and the spacing between insulated electrode layer 2A and bare electrode layer 2B is 220mm, and the spacing between bare electrode layer 2B and bare electrode layer 2C is 500mm.Using insulated electrode layer 2A with and bare electrode layer 2C connection transformer 8 as the first electrode layer 401, bare electrode layer 2B ground connection is as the second electrode lay 402, there is provided AC power and adjust service voltage to insulated electrode layer 2A and bare electrode layer 2C by transformer 8, thus make oil-water separation interface 14.1 in insulated electrode layer 2A and tank body form weak insulation electric field 501A, being formed between insulated electrode layer 2A and bare electrode layer 2B insulate between electric field 501B, bare electrode layer 2B and bare electrode layer 2C by force forms weak naked electric field 502A.Crude oil is after aqueous phase district 14 initial gross separation bottom separating tank 1, and what successively strength of electric field increased progressively from bottom to top carries out multistage processed to it, to realize the object that highly effective and safe is separated through weak insulation electric field 501A, strong insulation electric field 501B and weak naked electric field 502A.
Embodiment 3: as shown in Figure 4, uses 3B in one deck insulated electrode layer 411(and figure) with 3A, 3C, 3D and 3E in four layers of bare electrode layer 412(and figure) be vertically arranged to four electric field regions 5.Specifically, the spacing arranged from bottom to top between electrode layer 4 is respectively 520mm, 210mm, 500mm and 200mm, using insulated electrode layer 3B and bare electrode layer 3D connection transformer 8 as the first electrode layer 401, bare electrode layer 3A, bare electrode layer 3C and bare electrode layer 3E ground connection are as the second electrode lay 402, there is provided DC pulse to insulated electrode layer 1B and bare electrode layer 1D by transformer 8, and adjust service voltage, thus the weak insulated electro place 501A that formation pole strength increases progressively from bottom to top, strong insulated electro place 501B, weak naked electric field region 502A and strong naked electric field region 502B.Crude oil is after aqueous phase district 14 initial gross separation bottom separating tank 1, the weak insulated electro place 501A, by force insulated electro place 501B, weak naked electric field region 502A and the strong naked electric field region 502B that increase progressively from bottom to top through strength of electric field after elder generation carry out multistage processed to it, to realize the object that highly effective and safe is separated.
Embodiment 4: as shown in Figure 5, uses 4A in one deck insulated electrode layer 411(and figure) with 4B, 4C and 4D in three layers of bare electrode layer 412(and figure) vertically arrange, and coordinate formation four electric field regions 5 with the oil-water separation interface 14..1 in aqueous phase district 14.Specifically, the spacing arranged between insulated electrode layer 4A and oil-water separation interface 14.1 is 520mm, the spacing arranged from bottom to top between electrode layer is respectively 200mm, 500mm and 210mm, connecting insulated electrode layer 4A and bare electrode layer 4C by transformer 8 makes it as the first electrode layer 401, bare electrode layer 4B and bare electrode layer 4D ground connection are as the second electrode lay 402, transformer 8 provides alternating-current and adjusts its voltage to insulated electrode layer 4A and bare electrode layer 4C, thus make oil-water separation interface 14.1 in insulated electrode layer 4A and tank body form weak insulation electric field 501A, being formed between insulated electrode layer 4A and bare electrode layer 4B insulate between electric field 501B and bare electrode layer 4B and bare electrode layer 4C by force forms weak naked electric field 502A, strong naked electric field 502B is formed between bare electrode layer 4C and bare electrode layer 4D.Crude oil is after aqueous phase district 14 initial gross separation bottom separating tank 1, through weak insulation electric field 501A that strength of electric field increases progressively from bottom to top after elder generation) strong insulation electric field 501B, weak naked electric field 502A and strong naked electric field 502B carry out multistage processed to it, to realize the object that highly effective and safe is separated.
In above-described embodiment, the distance between each electrode layer 5 can based on crude character and water content flexible, and wherein insulated electrode layer 411 can not, by the impact of water content in crude oil change, make itself and other interelectrode spacing arrange flexibly convenient.Use compound field in device, achieve the effect of multistage oily water separation, improve oily water separation efficiency, simultaneously also reduction equipment volume, conveniently to exploit in Crude Oil at Sea.Electric field equipment and voltage supply can based on crude character and change of moisture content flexible, meet different crude oils separating treatment demand.
The present invention is described by several specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to substituting to the present invention.In addition, for particular condition or particular case, various amendment can be made to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole embodiments fallen within the scope of the claims in the present invention.
Claims (8)
1. a Dehydration plant for complex electric field, comprise separating tank (1), crude oil inlet/outlet pipe, water shoot (10), feed distributor (3), oil header (7) and transformer (8), crude oil inlet/outlet pipe and water shoot (10) are located on tank body, feed distributor (3) and oil header (7) are located in tank, described crude oil inlet/outlet pipe comprises oil inlet pipe (11) and oil outlet pipe (12), described feed distributor (3) is connected with described oil inlet pipe (11), and described oil header (7) is connected with described oil outlet pipe (12), transformer (8) is located at outside tank body, it is characterized in that: between feed distributor (3) with oil header (7), be provided with the compound electric place (13) for being separated profit, described compound electric place (13) comprises spaced apart several electrode layers (4) of in the vertical direction, described several electrode layers (4) comprise the second electrode lay (402) of the first electrode layer (401) that at least one and described transformer (8) be electrically connected and at least one ground connection, at least one first electrode layer (401) described comprises at least one bare electrode layer (412) and at least one insulated electrode layer (411) of being electrically connected with described transformer (8), at least one bare electrode layer (412) described and at least one insulated electrode layer (411) described cooperatively interact with corresponding the second electrode lay (402), be formed at least one insulated electro place (501) and at least one naked electric field region (502) of vertical direction layout, at least one first electrode layer (401) described and at least one the second electrode lay described (402) each other distance are adjustably arranged at described separating tank (1).
2. Dehydration plant for complex electric field according to claim 1, is characterized in that: in described compound electric place (13), the strength of electric field of each electric field region (5) increases progressively from bottom to top.
3. Dehydration plant for complex electric field according to claim 1, is characterized in that: described compound electric place (13) comprises the weak insulated electro place (501A) arranged, strong insulated electro place (501B), weak naked electric field region (502B) and strong naked electric field region (502A) from bottom to top.
4. Dehydration plant for complex electric field according to claim 1, it is characterized in that: at least one bare electrode layer (412) described comprises the bare electrode of some parallel interval arrangements in the same plane, at least one insulated electrode layer (411) described comprises the insulated electrode of some parallel interval arrangements in the same plane.
5. the Dehydration plant for complex electric field according to any one of Claims 1-4, is characterized in that: described separating tank (1) bottom comprises aqueous phase district (14), and described aqueous phase district (14) comprises oil-water separation interface (14.1); At least one first electrode layer (401) described comprises and described oil-water separation interface (14.1) mutually insulated electrode layer (411) across a certain distance, and this insulated electrode layer (411) coordinates with described oil-water separation interface (14.1) and forms insulated electro place (501).
6. the Dehydration plant for complex electric field according to any one of Claims 1-4, is characterized in that: each insulated electrode at least one described insulated electrode layer (411) and/or each bare electrode in bare electrode layer (412) are all fixed in separating tank (1) by insulating suspension (9) and/or insulating support rod; Each insulated electrode at least one described insulated electrode layer (411) and/or each bare electrode in bare electrode layer (412) are all interconnected and are electrically connected by airtight terminal box (6) and transformer (8) in airtight terminal box (6); Described transformer (8) provides AC power, DC pulse or alternating-current pulse to insulated electrode and/or bare electrode.
7. the Dehydration plant for complex electric field according to any one of Claims 1-4, is characterized in that: electrode layer described in each (4) comprises the electrode of some parallel interval arrangements in the same plane.
8. the Dehydration plant for complex electric field according to any one of Claims 1-4, it is characterized in that: described crude oil inlet/outlet pipe comprise be located at tank base vertically arrange or both ends horizontal arrange oil inlet pipe (11) and be located at tank body top vertical arrange or both ends horizontal setting oil outlet pipe (12), described feed distributor (3) is connected with oil inlet pipe (11) and is positioned at the middle and lower part of separating tank (1), described oil header (7) is connected with oil outlet pipe (12) and is positioned at separating tank (1) top, the compound electric place (13) be arranged between feed distributor (3) and oil header (7) is made to be placed in the top of separating tank (1).
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| CN105219429A (en) * | 2014-06-19 | 2016-01-06 | 中石化洛阳工程有限公司 | A kind of high water-content crude oil separation method |
| CN106318442B (en) * | 2016-08-19 | 2018-06-26 | 中石化炼化工程（集团）股份有限公司 | A kind of sump oil purification processing unit and purifying treatment method |
| CN114989859A (en) * | 2022-05-05 | 2022-09-02 | 中国石油化工股份有限公司 | Apparatus and method for dewatering crude oil containing water |
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| CN2515202Y (en) * | 2001-12-24 | 2002-10-09 | 张怀峰 | Dewatering device of coal tar with electrical means |
| CN202829960U (en) * | 2012-07-26 | 2013-03-27 | 中国海洋石油总公司 | Electrostatic dehydration device for high-water-content crude oil |
| CN102732296B (en) * | 2012-07-26 | 2014-05-14 | 中国海洋石油总公司 | High water-content crude oil electrostatic dehydration device |
| CN203474722U (en) * | 2013-07-31 | 2014-03-12 | 中国海洋石油总公司 | Compound electric field dehydration device |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC (China) Co., Ltd. Shenzhen Branch Patentee after: China Offshore Oil Group Co., Ltd. Address before: China CNOOC Building No. 25 Beijing 100010 Dongcheng District Chaoyangmen North Street China CNOOC Oil Corporation, the Ministry of science and technology development Co-patentee before: CNOOC (China) Co., Ltd. Shenzhen Branch Patentee before: China National Offshore Oil Corporation |