CN202829960U - Electrostatic dehydration device for high-water-content crude oil - Google Patents
Electrostatic dehydration device for high-water-content crude oil Download PDFInfo
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- CN202829960U CN202829960U CN 201220367089 CN201220367089U CN202829960U CN 202829960 U CN202829960 U CN 202829960U CN 201220367089 CN201220367089 CN 201220367089 CN 201220367089 U CN201220367089 U CN 201220367089U CN 202829960 U CN202829960 U CN 202829960U
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Abstract
The utility model discloses an electrostatic dehydration device for high-water-content crude oil. The device comprises a gas-liquid separating tank and an oil-water separating tank. The gas-liquid separating tank is provided with an oil-gas-water feeding pipe, an anti-flushing plate is arranged in the gas-liquid separating tank at an outlet position of the oil-gas-water feeding pipe, the gas-liquid separating tank is provided with a gas outlet pipe and an oil-water feeding pipe, a drainage pipe is arranged at the bottom of the oil-water separating tank, an oil outlet pipe is arranged at the top of the oil-water separating tank, and the oil-water feeding pipe is communicated with the oil-water separating tank and extends to the bottom of the oil-water separating tank. A feeding distributor is arranged at the bottom in the oil-water separating tank, an electrode assembly is arranged at the upper portion of the feeding distributor in the oil-water separating tank, a weak electric field area, a medium electric field area and a strong electric field area are formed on the electrode assembly from bottom to top, and the electrode assembly is connected with a transformer. The electrostatic dehydration device for the high-water-content crude oil can treat produced liquid of any oil-gas-water three phase ratio, is large in operation elasticity, can remove interface fluctuation of three-phase separating process, and improves efficiency of gas-liquid separation and oil-gas separation. The insulation electrode is adopted to avoid electrode short circuit and improves safety and operation stability of the device.
Description
Technical field
The utility model relates to a kind of high water-content crude oil static dewatering unit, belongs to oil and gas and water from technical field.
Background technology
The most frequently used separating device of oil-gas field surely belongs to triphase separator, usually adopts horizontal type structure, inside to be provided with pre-deaerating chamber and the settlement separate chamber of profit, utilizes the density difference of oil gas water, carries out natural gravity settlement separate.This method separation efficiency is low, and can only be used for rough segmentation, and the crude oil emulsion after the separation is moisture very high, usually needs just can reach outer defeated requirement through secondary heat chemistry settling and three grades of electro-dewaterings.This conventional separation method step is various, and equipment is numerous and jumbled, and floor space is large, and inefficiency.
The foreign study personnel have proposed the concept of first coalescent rear sedimentation of water droplet in the oily water separation field, developed a series of oily water separation pre-coalescence technology based on this principle such as compact type electrostatic coalescer CEC, online electrostatic coalescer IEC, the built-in electrostatic coalescer VIEC of container, low moisture coalescer LOWACC etc.Wherein CEC and IEC arrange separately, lay particular emphasis on water droplets coalescence; VIEC and LOWACC are built in triphase separator inside, and have carried out engineering test, but its built-in a plurality of electrode modules, preparation technology and complex structure, the easy accumulated solids particle of inner cellular runner cause stopping up and electric pole short circuit, and operation stability is poor.
Domesticly adopting electric field to promote also attempting aspect the oily water separation efficient.Utility model patent (publication number is CN201735213U) discloses a kind of oil gas depositing in water and has fallen separation electro-dewatering Multifunctional three-phase tripping device, is provided with successively settling pocket, electro-dewatering chamber and hydroecium, the indoor electrode plate with high voltage that is provided with of electro-dewatering within separating cylindrical shell.This patent directly adopts the bare metal electrode to apply high-voltage electric field in the moisture flash trapping stage tank of height, very easily causes electric current rising, short circuit even tripping operation, affects the equipment safety operation.
Domestic utility application (publication number is CN102021020A) has been announced a kind of novel crude oil electro-dewatering, desalting method and equipment based on the dielectrophoresis Mechanismic, adopt vertically suspended corrugated plate shape insulated electrode to produce the horizontal variation alternating-electric field, be used for the disperse phase particle water and grow up and meticulous dewatering and desalting.This patented technology is used for dewatering and desalting and has following deficiency: (1) is adopted and is vertically hung corrugated plate shape insulated electrode assembly, because crest is different with trough position polar plate spacing, crest place electric-field strength between every group of corrugated plate shape electrode, a little less than the trough place electric field, there is inhomogeneous field at local vertical direction.But see that from whole electric field region horizontal direction is uniform electric field, the vertical direction electric field is " 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; (2) vertically hang the pole plate bottom and be " line-face " electric field with water-oil interface, the electric field region fluctuation is large, is unfavorable for that stablize the position, boundary and dehydration; (3) vertically bridged electrode is combined with AC power, and the quick alternation of direction of an electric field between receiving electrode and oil water interface without electric field action, causes weak electric field discontinuous between earthing pole and oil water interface, the water droplets coalescence difficulty; (4) because oil water interface is unstable, cause the fluctuation of bottom aqueous phase zone, weaken water to the washing effect of raw material, cause the dewatering and desalting weak effect.
The utility model content
The purpose of this utility model provides a kind of high water-content crude oil static dewatering unit, and this device can be processed any vapour-liquid ratio, any water ratio emulsion, improves three phase separating efficiency, improves device stability, the reduction means size.
A kind of high water-content crude oil static dewatering unit provided by the utility model comprises knockout drum and gun barrel;
Described knockout drum is provided with oil gas water feed-pipe, is provided with striking plate in the exit of described oil gas water feed-pipe in the described knockout drum; Described knockout drum is provided with gas outlet pipe and profit feed-pipe;
The bottom of described gun barrel is provided with water shoot, and its top is provided with oil outlet pipe; Described profit feed-pipe is connected with described gun barrel and extends to the bottom of described gun barrel; Be provided with feed distributor in the place, bottom in the described gun barrel; Be provided with electrode assemblie in the top of described feed distributor in the described gun barrel, described electrode assemblie forms weak electric field area, middle forceful electric power place and forceful electric power place from bottom to top, and described electrode assemblie is connected with transformer.
Above-mentioned high water-content crude oil static dewatering unit, be provided with filler plate near described oil gas water feed-pipe place in the described knockout drum, this filler plate is located at the middle and upper part of described knockout drum, the oil gas water mixed liquid directly clashes into described striking plate through described oil gas water feed-pipe, thereby a large amount of gases and the liquid phase separation that contain in the oil gas, the liquid phase oil water mixture moves downward the liquid phase that enters described gas-liquid separation pot bottom, gas phase moves upward, mixture after just dividing is through described filler plate, the liquid that carries in the gas phase coalescent sedimentation on filler enters liquid phase, residual droplets is in the gas flow process, and gravitate sinks to also entering liquid phase naturally.
Above-mentioned high water-content crude oil static dewatering unit, be provided with spray catcher in described gas outlet pipe place in the described knockout drum, gas after the separation is by being arranged on the spray catcher of described gas outlet pipe below, discharges described knockout drum after further removing the fine droplet of Vapor Entrainment.
Above-mentioned high water-content crude oil static dewatering unit, described profit feed-pipe is connected with described feed distributor, the liquid phase oil water-in-oil emulsion directly enters described feed distributor by described profit feed-pipe, disperses to enter the water zone of described oily water separation pot bottom by the described feed distributor that is arranged on water.
Above-mentioned high water-content crude oil static dewatering unit, described electrode assemblie comprises 3 insulated electrodes and 3 bare electrodes, wherein said bare electrode and insulated electrode are alternative arrangement from bottom to top, form weak electric field area between first group of described bare electrode and the insulated electrode, forceful electric power place in forming between second group of described bare electrode and the insulated electrode, form the forceful electric power place between the 3rd group of described bare electrode and the insulated electrode, adapt to the different moisture content emulsion in the multistage dehydration of different electric field regions, take full advantage of between limited electric field region, reach multistage strengthen dewatering effect, detailed process is: the flood in the high aqueous emulsion drops in the coalescent sedimentation of weak electric field region, being emulsified in middle strong electric field region than low water content and continuing coalescent sedimentation through preliminary hydro-extraction, the emulsion of low water content enters strong electric field region at last, remaining little water droplet continues coalescent sedimentation under the highfield effect, through three grades of coalescent sedimentations, the crude oil after the dehydration is discharged this gun barrel through the oil outlet pipe that is positioned at described gun barrel top; Multistage coalescent drops of water fall down enters the bottom water phase region and discharges this gun barrel through the water shoot of described oily water separation pot bottom.
Above-mentioned high water-content crude oil static dewatering unit, described insulated electrode is connected with described transformer by airtight terminal box.
Above-mentioned high water-content crude oil static dewatering unit, described insulated electrode and bare electrode are horizontal plate electrode; The described bare electrode that is positioned at described oily water separation pot bottom is connected with the earth, with the bottom of guaranteeing described gun barrel stable water zone is arranged.
Above-mentioned high water-content crude oil static dewatering unit, described knockout drum is located at the top of described gun barrel, and described knockout drum and described gun barrel stack and can dwindle the separating tank floor space.
Can be between the above-mentioned high water-content crude oil static dewatering unit, described knockout drum and described gun barrel and be arranged in parallel or vertical setting.
Above-mentioned high water-content crude oil static dewatering unit, described oily water separation can be provided with at least 1 manhole on filling with, to cleaning and repair in the described gun barrel.
The high water-content crude oil static dewatering unit that uses the utility model to provide carries out dehydrating of crude oil, and have following advantage: (1) gas-liquid separation and oily water separation are carried out in two separating tanks that stack respectively; (2) gun barrel adopts insulated electrode; (3) the oil water interface place arranges earthing pole; (4) be followed successively by water district, weak electric field area, middle forceful electric power place, forceful electric power place in the gun barrel from bottom to top; (5) insulated electrode and high voltage electric are connected in the airtight terminal box.
The high water-content crude oil static dewatering unit that the utility model provides has following beneficial effect: the utility model can be processed any oil gas water three phase ratio Produced Liquid, turndown ratio is large, three phase separation process interface fluctuation be can eliminate, gas-liquid separation and oily water separation efficient improved; Adopt insulated electrode, avoid electric pole short circuit, improve equipment safety and operation stability; The stabilize water region guarantees fully washing; Strong and weak electric field subregion arranges, and reaches multistage dehydrating effect; The high pressure connecting zone is isolated separately, and is safe and reliable.
Description of drawings
The sectional view of the high water-content crude oil static dewatering unit that Fig. 1 provides for the utility model.
Fig. 2 is A-A line sectional view among Fig. 1.
The sectional view of the high water-content crude oil static dewatering unit of the another kind of structure that Fig. 3 provides for the utility model.
The structural representation of the feed distributor of the high water-content crude oil static dewatering unit that Fig. 4 provides for the utility model.
Each mark is as follows among the figure: 1 oil gas water feed-pipe, 2 striking plates, 3 filler plates, 4 spray catchers, 5 gas outlet pipes, 6 gas-liquid circle positions, 7 knockout drums, 8 profit feed-pipes, 9 feed distributors, 10 bare electrodes, 11 insulated electrodes, 12 airtight terminal boxes, 13 transformers, 14 manholes, 15 oil outlet pipes, 16 gun barrels, 17 water shoots.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further, but the utility model is not limited to following examples.
Such as Fig. 1, the high water-content crude oil static dewatering unit that the utility model provides comprises a knockout drum 7 and gun barrel 16, and knockout drum 7 is located at the top of gun barrel 16, and both are for be arrangeding in parallel; The bottom of knockout drum 7 is provided with oil gas water feed-pipe 8, and this oil gas water feed-pipe 8 is connected with gun barrel 16 and extends to its bottom; Be provided with striking plate 2 in the exit of oil gas water feed-pipe 8 in the knockout drum 7, and this knockout drum 7 is interior is provided with filler plate 3 near oil gas water feed-pipe 8 places, this filler plate 3 is located at the middle and upper part of knockout drum 7; The top of knockout drum 7 is provided with gas outlet pipe 5, and is provided with spray catcher 4 in these gas outlet pipe 5 places; The bottom of gun barrel 16 is provided with water shoot 17, and its top is provided with oil outlet pipe 15; The bottom of gun barrel 16 is provided with feed distributor 9, its structure as shown in Figure 4, and this feed distributor 9 is connected with oil gas water feed-pipe 8, as shown in Figure 2; Be provided with electrode assemblie in the top of feed distributor 9 in the gun barrel 16, this electrode assemblie comprises 3 insulated electrodes 11 and 3 bare electrodes 10, insulated electrode 11 and bare electrode 10 are horizontal plate electrode, 3 bare electrodes 10 and 3 insulated electrodes 11 are alternative arrangement from bottom to top, form successively weak electric field area between each bare electrode 10 and each insulated electrode 11, middle forceful electric power place and forceful electric power place, insulated electrode 11 is connected with transformer 13 by airtight terminal box 12, and the bare electrode 10 that is positioned at these gun barrel 16 bottoms (not shown) that is connected with the earth has stable water zone with the bottom of guaranteeing gun barrel 16; Oily water separation is filled with 16 and is provided with 2 manholes 14, is convenient to cleaning and repair in the gun barrel 16.
In the high water-content crude oil static dewatering unit that the utility model provides, also can take vertically arranged mode between knockout drum 7 and the gun barrel 16, as shown in Figure 3, and oil gas water feed-pipe 8 extends to the bottom of gun barrel 16, is not connected with feed distributor 9; The large I of knockout drum 7 is just adjusted according to air content.
Use high water-content crude oil static dewatering unit shown in Figure 1 to carry out dehydrating of crude oil, its implementation flow process is as follows: the oil gas water mixed liquid directly clashes into striking plate 2 through oil gas water feed-pipe 1, the a large amount of gases and the liquid phase separation that contain in the oil gas, the liquid phase oil water mixture moves downward the liquid phase that enters knockout drum 7 bottoms, gas phase moves upward, mixture after just dividing is through filler plate 3, the liquid that carries in the gas phase coalescent sedimentation on filler plate 3 enters liquid phase, residual droplets is in the gas flow process, gravitate sinks to also entering liquid phase (gas-liquid circle position is shown in mark 6) naturally, gas is by being arranged on the spray catcher 4 of gas outlet pipe 5 belows, discharges this knockout drum 7 after further removing the fine droplet of Vapor Entrainment; The liquid phase oil water-in-oil emulsion directly enters feed distributor 9 by profit feed-pipe 8, disperses to enter the water zone of gun barrel 16 bottoms by the feed distributor 9 that is arranged on water; Oil-water mixture is through a large amount of clear water washings in water zone, remove most of water droplet, then move upward and pass through successively weak electric field area between bare electrode 10 and the insulated electrode 11, middle forceful electric power place and forceful electric power place, flood in the high aqueous emulsion drops in the coalescent sedimentation of weak electric field region, being emulsified in middle strong electric field region than low water content and continuing coalescent sedimentation through preliminary hydro-extraction, the emulsion of low water content enters strong electric field region at last, remaining little water droplet continues coalescent sedimentation under the highfield effect, through three grades of coalescent sedimentations, the crude oil after the dehydration is discharged this gun barrel 16 through the oil outlet pipe 15 that is positioned at gun barrel 16 tops; Multistage coalescent drops of water fall down enters the bottom water phase region and discharges through the water shoot 17 of gun barrel 16 bottoms.
Use high water-content crude oil static dewatering unit shown in Figure 3 to carry out dehydrating of crude oil, basic identical when its implementation flow process and use device shown in Figure 1, difference is: the liquid phase oil water-in-oil emulsion directly enters an end of the gun barrel 16 that is positioned at knockout drum 7 belows by profit feed-pipe 8, disperses to enter the water of gun barrel 16 bottoms by feed distributor 9.
Claims (10)
1. high water-content crude oil static dewatering unit, it is characterized in that: it comprises knockout drum and gun barrel;
Described knockout drum is provided with oil gas water feed-pipe, is provided with striking plate in the exit of described oil gas water feed-pipe in the described knockout drum; Described knockout drum is provided with gas outlet pipe and profit feed-pipe;
The bottom of described gun barrel is provided with water shoot, and its top is provided with oil outlet pipe; Described profit feed-pipe is connected with described gun barrel and extends to the bottom of described gun barrel; Be provided with feed distributor in the place, bottom in the described gun barrel; Be provided with electrode assemblie in the top of described feed distributor in the described gun barrel, described electrode assemblie forms weak electric field area, middle forceful electric power place and forceful electric power place from bottom to top, and described electrode assemblie is connected with transformer.
2. static dewatering unit according to claim 1 is characterized in that: is provided with filler plate near described oil gas water feed-pipe place in the described knockout drum, this filler plate is located at the middle and upper part of described knockout drum.
3. static dewatering unit according to claim 1 and 2 is characterized in that: be provided with spray catcher in described gas outlet pipe place in the described knockout drum.
4. static dewatering unit according to claim 1 and 2, it is characterized in that: described profit feed-pipe is connected with described feed distributor.
5. static dewatering unit according to claim 1 and 2, it is characterized in that: described electrode assemblie comprises 3 insulated electrodes and 3 bare electrodes, wherein said bare electrode and insulated electrode are alternative arrangement from bottom to top.
6. static dewatering unit according to claim 5, it is characterized in that: described insulated electrode is connected with described transformer by airtight terminal box.
7. static dewatering unit according to claim 6, it is characterized in that: described insulated electrode and bare electrode are horizontal plate electrode; The described bare electrode that is positioned at described oily water separation pot bottom is connected with the earth.
8. static dewatering unit according to claim 1 and 2, it is characterized in that: described knockout drum is located at the top of described gun barrel.
9. static dewatering unit according to claim 8 is characterized in that: between described knockout drum and the described gun barrel for be arrangeding in parallel or vertical setting.
10. static dewatering unit according to claim 1 and 2 is characterized in that: described oily water separation is filled with and is provided with at least 1 manhole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367089 CN202829960U (en) | 2012-07-26 | 2012-07-26 | Electrostatic dehydration device for high-water-content crude oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367089 CN202829960U (en) | 2012-07-26 | 2012-07-26 | Electrostatic dehydration device for high-water-content crude oil |
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| Publication Number | Publication Date |
|---|---|
| CN202829960U true CN202829960U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220367089 Expired - Lifetime CN202829960U (en) | 2012-07-26 | 2012-07-26 | Electrostatic dehydration device for high-water-content crude oil |
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| CN (1) | CN202829960U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103450927A (en) * | 2013-07-31 | 2013-12-18 | 中国海洋石油总公司 | Dehydration plant for complex electric field |
| CN107723020A (en) * | 2017-11-22 | 2018-02-23 | 中国石油大学(华东) | A kind of oil gas water three phase electrostatic coalescence separator |
| CN108463277A (en) * | 2015-12-22 | 2018-08-28 | 卡梅伦解决方案公司 | Crude oil storage tank with the electrostatic inner member for making crude oil dehydration in the processing system of Floating Production storage and debarkation facilities |
-
2012
- 2012-07-26 CN CN 201220367089 patent/CN202829960U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103450927A (en) * | 2013-07-31 | 2013-12-18 | 中国海洋石油总公司 | Dehydration plant for complex electric field |
| CN108463277A (en) * | 2015-12-22 | 2018-08-28 | 卡梅伦解决方案公司 | Crude oil storage tank with the electrostatic inner member for making crude oil dehydration in the processing system of Floating Production storage and debarkation facilities |
| CN107723020A (en) * | 2017-11-22 | 2018-02-23 | 中国石油大学(华东) | A kind of oil gas water three phase electrostatic coalescence separator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC RESEARCH INSTITUTE Co.,Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
|
| CX01 | Expiry of patent term |