CN101805633B - Crude oil electro-desalting dehydrator - Google Patents
Crude oil electro-desalting dehydrator Download PDFInfo
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- CN101805633B CN101805633B CN2010101628804A CN201010162880A CN101805633B CN 101805633 B CN101805633 B CN 101805633B CN 2010101628804 A CN2010101628804 A CN 2010101628804A CN 201010162880 A CN201010162880 A CN 201010162880A CN 101805633 B CN101805633 B CN 101805633B
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Abstract
The invention discloses a crude oil electro-desalting dehydrator which solves the problem that the conventional crude oil electro-desalting dehydrator has smaller electrical field space formed in a tank body and higher drainage crude oil content. An electrode in the tank body (1) is horizontally provided with three layers of planar electrode plates which are sequentially an upper layer planar electrode plate (21), a middle planar electrode plate (22) and a lower layer planar electrode plate (23) from top to bottom. A side electrode plate is arranged between the side edges of the same side at which the upper layer planar electrode plate and the lower layer planar electrode plate are arranged. The distance between the middle planar electrode plate and the lower layer planar electrode plate is greater than the distance between the upper layer planar electrode plate and the middle planer electrode plate; and the distance from the side electrode plate to the inner wall of the tank body increases from top to bottom. The crude oil electro-desalting dehydrator can be used for refineries of oil fields and petroleum processing industries and carries out the electro-desalting and dehydration on the crude oil (mainly heavy crude oil).
Description
Technical field
The present invention relates to a kind of crude oil electro-desalting dehydrator, be used for removing the contained Yan Heshui of crude oil.
Background technology
Desalting and dewatering is the requisite pretreatment technology of crude oil.At the oil field of China and the refinery of refining of petroleum industry, it is heavy that the handled crude oil of electric desalting and dewatering device becomes gradually at present, and impurities is more and more.Heavy crude has that density is big, viscosity is high, asphalt content and heavy metal content is high, aqueous emulsion is difficult for breakdown of emulsion characteristics, and its saltiness is generally 100 micrograms/more than the gram.This makes the crude oil electro-desalting dehydrator often can not smooth working, and has influence on the long-term operation of follow up device.In electric desalting and dewatering device, electrode applies the carrier of electric field as X-former to crude oil, in the electrodesalting and electrodehydrating process, plays a part very important.Two types electric desalting and dewatering device is arranged, and at home and abroad oil field and refinery have obtained a large amount of uses.A kind of is to adopt the horizontal electrode plate, and another kind is to adopt the vertical hanging battery lead plate; The aqueous crude oil of saliferous gets into from the bottom of electric desalting and dewatering device tank body, and the crude oil behind the electrodesalting and electrodehydrating is extracted out from the tank body top, and sedimentary water is discharged from tank base." petroleum refining engineering " first volume that petroleum industry press published in 1988 has been introduced a kind of electric desalting and dewatering device that the horizontal electrode plate is set for the 350th～351 page, is provided with two-layer plane electrode plate up and down; Form a forceful electric power place between the two-layer battery lead plate, form a weak electric field area between lower electrode plate and the water-oil interface.The shortcoming of this electric desalting and dewatering device is that the electric field space that forms in the tank body is less, for heavy crude, does not often reach satisfied desalting and dewatering effect.Water content in crude oil behind the electrodesalting and electrodehydrating is generally 0.5～1w% (w% representes weight percentage), and saltiness is generally tens microgram/grams.The disclosed a kind of electrical desalting and dewatering device of Chinese patent CN2177723Y, the axial line of battery lead plate plane and electric desalting and dewatering device tank body is perpendicular, the alternate layout of positive and negative electrode plate.Through circuit control, form DC electric field between the vertical electrical pole plate, form between the bottom of battery lead plate and the water-oil interface and exchange weak electric field.The problem that this electric desalting and dewatering device exists is, the electric field space that forms in the tank body is less, and is similar with the above-mentioned electric desalting and dewatering device that the horizontal electrode plate is set.Another problem is, what form between battery lead plate bottom and the water-oil interface exchanges weak electric field, exists positive electric field and negative electric field simultaneously, is unsettled, can cause disturbance to water-oil interface, thereby make the crude content of draining higher.The crude content of draining can reach 2000～3000 microgram/grams usually, reaches 10,000 micrograms/more than the gram at most; This will make the WWT load higher.
Summary of the invention
The purpose of this invention is to provide a kind of crude oil electro-desalting dehydrator, to solve less, the draining crude content problem of higher of electric field space that forms in the tank body that existing crude oil electro-desalting dehydrator exists respectively.
For addressing the above problem; The technical scheme that the present invention adopts is: a kind of crude oil electro-desalting dehydrator; Comprise tank body, X-former, be provided with electrode in the tank body, the bottom of tank body is provided with inlet tube, water shoot; The top is provided with outlet pipe; It is characterized in that: the electrode level is provided with three layer plane battery lead plates, and three layer plane battery lead plates are followed successively by upper strata plane electrode plate, mid-plane battery lead plate and lower floor's plane electrode plate from top to bottom, and upper strata plane electrode plate and lower floor's plane electrode plate are provided with the side electrode plate between the side of the same side; Upper strata plane electrode plate, lower floor's plane electrode plate and side electrode plate are formed the outer ring battery lead plate; The mid-plane battery lead plate is positioned at its internal space, and the distance between mid-plane battery lead plate and the lower floor's plane electrode plate is greater than the distance between upper strata plane electrode plate and the mid-plane battery lead plate, and the distance of side electrode plate to inner tank wall is from top to bottom by little increase.
Adopt the present invention; Have following beneficial effect: (1) crude oil electro-desalting dehydrator of the present invention is after the battery lead plate energising; Form the upper vertical electric field between upper strata plane electrode plate and the mid-plane battery lead plate; Form the intermediate vertical electric field between mid-plane battery lead plate and the lower floor's plane electrode plate, form the lower vertical electric field between lower floor's plane electrode plate and jar intravital water-oil interface, form the side electric field between side electrode plate and the inner tank wall.Therefore, jar intravital space availability ratio is higher, and formed electric field space is bigger.(2) formed lower vertical electric field between lower floor's plane electrode plate and jar intravital water-oil interface is single positive electric field or negative electric field at any time, rather than has positive electric field and negative electric field simultaneously.Therefore this electric field is more stable, can not cause disturbance to water-oil interface, helps reducing the crude content of draining.(3) distance between mid-plane battery lead plate and the lower floor's plane electrode plate is greater than the distance between upper strata plane electrode plate and the mid-plane battery lead plate, so the strength of electric field of formed intermediate vertical electric field is lower than the strength of electric field of formed upper vertical electric field between upper strata plane electrode plate and the mid-plane battery lead plate between mid-plane battery lead plate and the lower floor's plane electrode plate.The distance of side electrode plate to inner tank wall is from top to bottom by little increase, thus between side electrode plate and the inner tank wall strength of electric field of formed side electric field from top to bottom by high step-down.In addition can be according to the height of water-oil interface in actually operating situation adjustment electrode and the tank body; Make the enough distances of maintenance between lower floor's plane electrode plate and the water-oil interface; Formed lower vertical electric field is a weak electric field between the interior water-oil interface of lower floor's plane electrode plate and tank body thereby make, and its strength of electric field is lower than the strength of electric field of formed intermediate vertical electric field between mid-plane battery lead plate and the lower floor's plane electrode plate.See that so on the whole the strength of electric field of tank body internal electric field is the distribution of " the low down height of going up "; Water content in crude oil small upper zone strength of electric field is higher in tank body, and the lower region strength of electric field that water content in crude oil is bigger is lower.Therefore, electric-field intensity distribution rationally, can be complementary with the distribution of water content in crude oil.This can reduce electric current, save power consumption; The water droplet that can also prevent a large amount of coalescences of tank body lower region conducts electricity and the phenomenon that is short-circuited, and makes electric field keep stable.
The present invention can be used for the refinery of oil field and refining of petroleum industry, and crude oil (mainly being heavy crude) is carried out electrodesalting and electrodehydrating, can obtain effect preferably.Water content in crude oil behind the electrodesalting and electrodehydrating can be reduced to below the 0.3w%, and saltiness can be reduced to 3 micrograms/below the gram; The crude content of draining can be reduced to 200 micrograms/below the gram, thereby can reduce the WWT load greatly.
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.Accompanying drawing and embodiment do not limit the present invention and require the scope protected.
Description of drawings
Fig. 1 is that crude oil electro-desalting dehydrator of the present invention is along the axial sectional view of tank body.
Fig. 2 has A-A sectional view (amplification) among Fig. 1.
Among Fig. 1 and Fig. 2, same reference numerals is represented identical technical characterictic.
Embodiment
Referring to Fig. 1, Fig. 2, crude oil electro-desalting dehydrator of the present invention comprises tank body 1, X-former 7.Tank body 1 is horizontal circle tube tank body, is provided with electrode in it.The bottom of tank body 1 is provided with inlet tube 8, water shoot 5, divider 10, and the top is provided with outlet pipe 9, condensing funnel 11.Wherein, inlet tube 8 generally is provided with 2～4 respectively, 1～3 of water shoot 5 operated by rotary motion with outlet pipe 9.Shown in Figure 1, inlet tube 8 is provided with 2 respectively with outlet pipe 9, and water shoot 5 is provided with 1.
The electrode level is provided with three layer plane battery lead plates (one deck being set than the existing crude oil electro-desalting dehydrator that two-layer plane electrode plate is set) more, and three layer plane battery lead plates are followed successively by upper strata plane electrode plate 21, mid-plane battery lead plate 22 and lower floor's plane electrode plate 23 from top to bottom.Upper strata plane electrode plate 21 and lower floor's plane electrode plate 23 are provided with the side electrode plate between the side of the same side, both sides respectively are provided with one.Each side electrode plate has a top side and a sides, links to each other with the side of corresponding upper strata plane electrode plate 21 with lower floor plane electrode plate 23 respectively.Upper strata plane electrode plate 21, lower floor's plane electrode plate 23 and side electrode plate are formed the outer ring battery lead plate, and mid-plane battery lead plate 22 is positioned at its internal space.The side of above-mentioned upper strata plane electrode plate 21, lower floor's plane electrode plate 23 and side electrode plate, and the side of plane electrode plate 22 and arc surface battery lead plate 24 hereinafter are meant the edge that each battery lead plate and tank body axial line 12 parallel.
Distance b between mid-plane battery lead plate 22 and the lower floor's plane electrode plate 23 greater than between upper strata plane electrode plate 21 and the mid-plane battery lead plate 22 apart from a, the distance of side electrode plate to tank body 1 inwall is from top to bottom by little increase.
The side electrode plate generally is to adopt arc surface battery lead plate 24, and is as shown in Figure 2.The top side of each arc surface battery lead plate 24 and sides link to each other with the side of corresponding upper strata plane electrode plate 21 with lower floor plane electrode plate 23 respectively, and the distance of arc surface battery lead plate 24 to tank body 1 inwall is from top to bottom by little increase.
As the existing used battery lead plate of crude oil electro-desalting dehydrator; Upper strata of the present invention plane electrode plate 21, mid-plane battery lead plate 22, lower floor's plane electrode plate 23 and side electrode plate (for example the arc surface battery lead plate 24) also all are metal tube or metal bar are fixed in fastening piece on the metallic support rod member of several conductions and form; The metallic support rod member also has electric action simultaneously.Wherein the outside diameter of metal tube or metal bar is generally 10～20 millimeters, and the distance between adjacent two metal tubes or the metal bar axial line is generally 80～100 millimeters.The metallic support rod member can adopt structure manufactures such as angle steel.The metallic support rod member of upper strata plane electrode plate 21, mid-plane battery lead plate 22 and lower floor's plane electrode plate 23 is a straight-bar; When the side electrode plate adopted arc surface battery lead plate 24, its metallic support rod member was that circular arc is linear.Referring to Fig. 2 and Fig. 1; The metallic support rod member of upper strata plane electrode plate 21 and lower floor's plane electrode plate 23 is positioned at the end of the same side; Link to each other methods such as (can adopt be connected) welding the support frame that forms a whole respectively with the two ends of the metallic support rod member of the side electrode plate that is positioned at the same side (arc surface battery lead plate 24).The metallic support rod member of mid-plane battery lead plate 22 is hung 42 through insulation and is linked to each other with the metallic support rod member of upper strata plane electrode plate 21.Thus, form one group of electrode of the present invention.One group of electrode of the present invention is made up of above-mentioned upper strata plane electrode plate 21, mid-plane battery lead plate 22, lower floor's plane electrode plate 23 (respectively having) and side electrode plate (for example the arc surface battery lead plate 24, have two).The metallic support rod member of upper strata plane electrode plate 21 is hung 42 through insulation and is hung on the bearing cross beam set in tank body 1 41, will put in order the group electrode with this and be fixed in the tank body 1.42 material is hung in insulation can adopt tetrafluoroethylene, insulating ceramic etc.Bearing cross beam 41 can adopt structure manufactures such as angle steel, is fixed in the top of tank body 1 inwall with methods such as welding.
Referring to Fig. 2; The main structure parameters of crude oil electro-desalting dehydrator of the present invention is generally following: between upper strata plane electrode plate 21 and the mid-plane battery lead plate 22 is 250～350 millimeters apart from a, and the distance b between mid-plane battery lead plate 22 and the lower floor's plane electrode plate 23 is 350～400 millimeters.When the side electrode plate adopted arc surface battery lead plate 24, the distance c of top side to tank body 1 inwall of arc surface battery lead plate 24 was 250～350 millimeters, sides to tank body 1 inwall be 350～400 millimeters apart from d.The side of mid-plane battery lead plate 22 should keep certain distance with between the side electrode plate that is adjacent, to prevent short circuit; When the side electrode plate adopted arc surface battery lead plate 24, this was generally 250～350 millimeters apart from e.
Lower floor's plane electrode plate 23 generally is and tank body axial line 12 equal altitudes, or is positioned at the top of tank body axial line 12; Can make whole group electrode all be positioned at upper part of tank body 1 like this; And can make usually between lower floor's plane electrode plate 23 and the water-oil interface 6 and to keep enough apart from g; Make this apart from g greater than the distance b between mid-plane battery lead plate 22 and the lower floor's plane electrode plate 23, thereby make the strength of electric field of formed lower vertical electric field 34 between lower floor's plane electrode plate 23 and the water-oil interface 6 be lower than the strength of electric field of formed intermediate vertical electric field 32 between mid-plane battery lead plate 22 and the lower floor's plane electrode plate 23.Lower floor's plane electrode plate 23 to tank body axial line 12 be generally 0～400 millimeter (represent when being 0 millimeter lower floor's plane electrode plate 23 with tank body axial line 12 equal altitudes) apart from f apart from f; Under such condition, be generally 600～900 millimeters apart from g in lower floor's plane electrode plate 23 and the tank body 1 between the water-oil interface 6.
The distance at upper strata plane electrode plate 21 to tank body 1 inwall top, general requirement be more than 600 millimeters, is short-circuited between upper strata plane electrode plate 21 and the condensing funnel 11 preventing.
The measurement of the distance relevant with each battery lead plate, with the formed imaginary plane of axial line through metal tube in each battery lead plate or metal bar as the reference plane of measuring.Above-mentioned distance c is meant the shortest distance of top side to tank body 1 inwall of arc surface battery lead plate 24; Be meant the shortest distance of sides to tank body 1 inwall of arc surface battery lead plate 24 apart from d, the side that is meant mid-plane battery lead plate 22 apart from e is with the shortest distance between the arc surface battery lead plate 24 that is adjacent.
The range transformer that X-former 7 can adopt existing crude oil electro-desalting dehydrator to use always.For example shown in Figure 1, X-former 7 is the alternating current-direct current X-former, is provided with a positive output end and a negative output terminal.Positive output end links to each other with the outer ring battery lead plate, and negative output terminal links to each other with mid-plane battery lead plate 22, tank body 1 ground connection.X-former can also be AC transformer or umformer, is provided with an output terminal (output AC electricity or direct current), links to each other with the outer ring battery lead plate; Mid-plane battery lead plate and tank ground.Relevant accompanying drawing omits.
The present invention, along 1～4 group of electrode of direction operated by rotary motion of tank body axial line 12, every group of electrode is respectively with 7 power supplies of an X-former in the tank body 1.Electrode the group number is set, mainly be that the power according to X-former 7, the length of tank body 1 and the length of every group of electrode are confirmed.Referring to Fig. 1, the length L of every group of electrode is generally 5～7 meters.Crude oil electro-desalting dehydrator shown in Figure 1 is provided with 2 groups of electrodes, supplies power respectively with two X-formers 7.
Among Fig. 1 of the present invention, X-former 7 is not analysed and observe.Among Fig. 2, the X-former 7 among not shown Fig. 1 and two output terminals thereof are connected with electrode.
Referring to Fig. 1, Fig. 2; Two output terminals of X-former 7 are respectively after outer ring battery lead plate and 22 energisings of mid-plane battery lead plate; Form upper vertical electric field 31 between upper strata plane electrode plate 21 and the mid-plane battery lead plate 22, strength of electric field is generally 800～1000 volt/cm, is a highfield.Form intermediate vertical electric field 32 between mid-plane battery lead plate 22 and the lower floor's plane electrode plate 23, strength of electric field is generally 600～800 volt/cm, is the electric field of a medium tenacity.Form side electric field (having two) between the inwall of side electrode plate and tank body 1, strength of electric field is from top to bottom by high step-down.When the side electrode plate adopts arc surface battery lead plate 24, and formed side electric field is a circular arc electric field 33 between the inwall of tank body 1; The strength of electric field at circular arc electric field 33 tops is generally 800～1000 volt/cm, and the strength of electric field of bottom is generally 600～800 volt/cm.Form lower vertical electric field 34 between the water-oil interface 6 in lower floor's plane electrode plate 23 and the tank body 1, the strength of electric field general requirement is 300～500 volt/cm, is a weak electric field.Can be according to the height of water-oil interface 6 in actually operating situation adjustment electrode and the tank body 1; Make the distance that maintenance is enough between lower floor's plane electrode plate 23 and the water-oil interface 6 (for example aforesaid), thereby the strength of electric field of formed lower vertical electric field 34 between lower floor's plane electrode plate 23 and the water-oil interface 6 is remained in the scope of the present invention's proposition apart from g.When confirming the height of water-oil interface 6, also to consider the residence time of water in the water-oil interface 6 below water layers.
Space between upper strata plane electrode plate 21 and 1 inwall of the tank body above it also forms electric field; The strength of electric field of this electric field generally changes in the scope of 300～500 volt/cm with the difference of position everywhere.Because the water cut of crude oil is very low in this electric field region, this electric field does not have the electrodesalting and electrodehydrating effect basically to the crude oil in the said zone; The present invention does not consider this electric field.
For guaranteeing the electrodesalting and electrodehydrating effect; X-former 7 for selected output voltage; Can suitably select of the present invention respectively apart from a, b, c, d, f, g etc.; And do not receive the restriction of the data area that the present invention proposes, the strength of electric field of each electric field is remained in the data area that the present invention proposes.
When the transformer adopting of crude oil electro-desalting dehydrator of the present invention is provided with AC transformer or the umformer of an output terminal; When its after outer ring battery lead plate energising; Identical in the strength of electric field of formed electric field and each electric field and Fig. 1, the crude oil electro-desalting dehydrator shown in Figure 2 specifies and the accompanying drawing omission.
Be that example is explained operating process of the present invention with Fig. 1, crude oil electro-desalting dehydrator shown in Figure 2 below.The aqueous heavy crude of saliferous gets into divider 10 by inlet tube 8, after divider 10 distributes, gets into equably in the tank body 1, and upwards flows.Through water-oil interface 6, at first get into formed lower vertical electric field 34 between lower floor's plane electrode plate 23 and the water-oil interface 6, electrodesalting and electrodehydrating in this electric field.Afterwards; Part crude oil upwards flows; Get between mid-plane battery lead plate 22 and the lower floor's plane electrode plate 23 electrodesalting and electrodehydrating in the formed intermediate vertical electric field 32, upwards flow between upper strata plane electrode plate 21 and the mid-plane battery lead plate 22 electrodesalting and electrodehydrating in the formed upper vertical electric field 31 again.Crude oil in upper vertical electric field 31 behind the electrodesalting and electrodehydrating upwards flows, and gets into the space between upper strata plane electrode plate 21 and 1 inwall of the tank body above it.Another part crude oil upwards flows, and gets between the inwall of two arc surface battery lead plates 24 and tank body 1 electrodesalting and electrodehydrating in formed two circular arc electric fields 33 respectively.Crude oil in circular arc electric field 33 behind the electrodesalting and electrodehydrating upwards flows, and also gets into the space between upper strata plane electrode plate 21 and 1 inwall of the tank body above it.The crude oil that comes together in this space is the cleaned crude oil behind the electrodesalting and electrodehydrating, gets into condensing funnel 11, is extracted out by outlet pipe 9 at last.In the said process, the downward sedimentation of saliferous water droplet of coalescence in each electric field is deposited on through water-oil interface 6 in the water layer of water-oil interface 6 belows.Water in the water layer is discharged by water shoot 5 at last.
Main operating features of the present invention is that heavy crude is carried out electrodesalting and electrodehydrating in each electric field of crude oil electro-desalting dehydrator of the present invention.All the other operations, the for example use of the mixing of electrodesalting and electrodehydrating temperature controlling, heavy crude and water, emulsion splitter etc., basic identical with existing crude oil electro-desalting dehydrator, explanation is omitted.
Claims (6)
1. crude oil electro-desalting dehydrator; Comprise tank body (1), X-former (7); Tank body is provided with electrode in (1); The bottom of tank body (1) is provided with inlet tube (8), water shoot (5), and the top is provided with outlet pipe (9), it is characterized in that: the electrode level is provided with three layer plane battery lead plates; Three layer plane battery lead plates are followed successively by upper strata plane electrode plate (21), mid-plane battery lead plate (22) and lower floor's plane electrode plate (23) from top to bottom; Upper strata plane electrode plate (21) and lower floor's plane electrode plate (23) are provided with the side electrode plate between the side of the same side, upper strata plane electrode plate (21), lower floor's plane electrode plate (23) and side electrode plate are formed the outer ring battery lead plate, and mid-plane battery lead plate (22) is positioned at its internal space; Distance between mid-plane battery lead plate (22) and the lower floor's plane electrode plate (23) is greater than the distance between upper strata plane electrode plate (21) and the mid-plane battery lead plate (22), and the distance of side electrode plate to tank body (1) inwall is from top to bottom by little increase.
2. crude oil electro-desalting dehydrator according to claim 1 is characterized in that: the side electrode plate is arc surface battery lead plate (24).
3. crude oil electro-desalting dehydrator according to claim 2; It is characterized in that: the distance between upper strata plane electrode plate (21) and the mid-plane battery lead plate (22) is 250～350 millimeters; Distance between mid-plane battery lead plate (22) and the lower floor's plane electrode plate (23) is 350～400 millimeters; The distance of top side to tank body (1) inwall of arc surface battery lead plate (24) is 250～350 millimeters, and the distance of sides to tank body (1) inwall is 350～400 millimeters, lower floor's plane electrode plate (23) and tank body axial line (12) equal altitudes; Or be positioned at the top of tank body axial line (12), to the distance of tank body axial line (12) be 0～400 millimeter.
4. crude oil electro-desalting dehydrator according to claim 1; It is characterized in that: X-former (7) is the alternating current-direct current X-former, is provided with a positive output end and a negative output terminal, and positive output end links to each other with the outer ring battery lead plate; Negative output terminal links to each other with mid-plane battery lead plate (22), tank body (1) ground connection.
5. crude oil electro-desalting dehydrator according to claim 1 is characterized in that: X-former is AC transformer or umformer, is provided with an output terminal, links to each other mid-plane battery lead plate and tank ground with the outer ring battery lead plate.
6. according to any one described crude oil electro-desalting dehydrator in the claim 1 to 5, it is characterized in that: the direction along tank body axial line (12) in the tank body (1) is provided with 1～4 group of said electrode.
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Families Citing this family (6)
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| CN102373074B (en) * | 2010-08-21 | 2013-11-27 | 中国石油化工股份有限公司 | Sump oil electric dehydration device |
| CN102373073B (en) * | 2010-08-21 | 2013-09-11 | 中国石油化工股份有限公司 | Hydrocarbon oil electric dehydration apparatus |
| CN102994139B (en) * | 2011-09-09 | 2015-03-25 | 中国石油化工股份有限公司 | Electric desalting and dehydrating device, and electric desalting and dehydrating method |
| CN102994140B (en) * | 2011-09-09 | 2015-01-21 | 中国石油化工股份有限公司 | Crude oil electric desalting and dehydrating device and method |
| CN102849884B (en) * | 2012-07-09 | 2014-09-17 | 胜利油田中胜环保有限公司 | Desalination method and device in petroleum sulfonate production |
| CN103773428B (en) * | 2012-10-26 | 2016-03-30 | 中国石油化工股份有限公司 | A kind of high efficiency electrical desalting and dehydration equipment and application |
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| US4209374A (en) * | 1977-04-04 | 1980-06-24 | Petrolite Corporation | Plural parallel stage desalting and dehydration |
| CN2464729Y (en) * | 2001-01-20 | 2001-12-12 | 长江(扬中)电脱盐设备公司 | High-speed electric desalinating and dewatering equipment |
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| US4209374A (en) * | 1977-04-04 | 1980-06-24 | Petrolite Corporation | Plural parallel stage desalting and dehydration |
| CN2464729Y (en) * | 2001-01-20 | 2001-12-12 | 长江(扬中)电脱盐设备公司 | High-speed electric desalinating and dewatering equipment |
| CN1530425A (en) * | 2003-03-10 | 2004-09-22 | 朱绪荣 | High-efficient electric desalting apparatus |
| CN100366707C (en) * | 2006-07-07 | 2008-02-06 | 中国石油化工集团公司 | Electric desalting and dewatering device |
| CN101045883A (en) * | 2007-04-26 | 2007-10-03 | 北京科技大学 | Electric desalting/dewatering device with efficient combined electrode |
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