CN1233793C - Electric desalting dewatering device for crude oil - Google Patents
Electric desalting dewatering device for crude oil Download PDFInfo
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- CN1233793C CN1233793C CN 200410075323 CN200410075323A CN1233793C CN 1233793 C CN1233793 C CN 1233793C CN 200410075323 CN200410075323 CN 200410075323 CN 200410075323 A CN200410075323 A CN 200410075323A CN 1233793 C CN1233793 C CN 1233793C
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Abstract
The present invention discloses an electric desalting dehydrator of crude oil, which is used for petrochemical industry. The present invention solves problems that the feeding of weak electric fields weakens electric aggregation action of a strong electric field region, because the crude oil flows from bottom to top, the settlement of water drops is blocked, etc. which the electric desalting dehydrator exists. The present invention is mainly characterized in that when operated, the electric desalting dehydrator of crude oil can use the direct feeding of strong electric fields and the horizontal flow of the crude oil. The electric desalting dehydrator of the present invention is provided with a strong electric field aggregation region (5) along an axial direction of a tank body from the inlet end of oil and water mixtures of the tank body (1), and the top of the clarification crude oil outlet end of the tank body is provided with an oil outlet pipe (10); the strong electric field aggregation region is provided with at least two layers of plane type electrode plates (6) which are parallel or perpendicular to the axial direction of the tank body, and the two layers of plane type electrode plates are mutually parallel. A feeding distributor (4) is arranged in the tank body, a spout for spraying the oil and water mixtures into the strong electric fields among all adjacent two layers of electrode plates is arranged on the feeding distributor, and a settlement separate region (7) is also arranged between the strong electric field aggregation region and the clarification crude oil outlet end of the tank body.
Description
The application is to be that July 18, original applying number in 2003 are 03126263.5, former denomination of invention is divided an application for " a kind of crude oil electro-desalting dehydrator " patent application original application day.
Technical field
The present invention relates to a kind of crude oil electric desalting dewatering equipment that is used for petroleum chemical industry.
Background technology
Chinese patent CN2159833Y discloses the electrical desalting and dewatering device and the technology of a kind of squirrel-cage electrode assembly and crude oil horizontal flow.The profit compound enters in the tank body from the profit compound inlet end of electric desalting and dewatering device tank body, by the distribution plate horizontal flow, successively by weak electric field area, transition electric field region and forceful electric power place.At the bottom of coalescent water droplet was deposited to jar with parabolic path, the crude oil behind the desalting and dewatering was extracted out from the oil header that is positioned at electric desalting and dewatering device tank body cleaned crude oil exit end.What this electric desalting and dewatering device adopted is single-layer electrodes, can be used for the electrical desalting and dewatering device that tank diameter is less, treatment capacity is less.Owing to adopted crude water advection flowing mode, make the crude oil flow direction vertical with the drops of water fall down direction, thereby basically eliminate the disadvantageous effect of crude oil flow to the drops of water fall down generation.The main drawback of this electric desalting and dewatering device is: because the profit compound had not only passed through weak electric field area before entering the forceful electric power place, but also passed through the transition electric field region, the content of water in the profit compound that enters the forceful electric power place is reduced in a large number.(vide infra) as can be seen from the relation of water droplets coalescence power and water content in crude oil, in this case, will make the voltolisation knot effect reduction of forceful electric power place, even completely dissolve, therefore can have a strong impact on desalting and dewatering raw oil efficient.In addition, form ring electric field in the electric desalting and dewatering device tank body, the radially-arranged ununiformity of strength of electric field also will influence the desalting and dewatering effect of crude oil.Because electric field is applied to the totality space of electric desalting and dewatering device tank body substantially, so the power consumption of electrical desalting and dewatering device can obviously increase.
The disclosed a kind of electric desalting and dewatering device of CN1298922A adopts the transverse section to be the multi-layered electrode of annular; Spacing in the electrode assembly between the adjacent two layers electrode is ascending gradually from the top to the bottom, makes strength of electric field from top to bottom by dying down by force.Crude oil also is to adopt the horizontal flow mode.This electric desalting and dewatering device can be used for the electrical desalting and dewatering device that tank diameter is big, treatment capacity is bigger, but also there is the uneven problem of strength of electric field radial distribution in its formed ring electric field, has influence on the desalting and dewatering raw oil effect.Because ring electric field almost has been full of the intravital whole spaces of electric desalting and dewatering device jar, so its power consumption is also than higher.The disclosed this electric desalting and dewatering device of CN1298922A also is provided with weak electric field area, transition electric field region and forceful electric power place (the profit compound is successively by these three electric field regions) in actual applications, crude oil electric desalting dewatering efficient is also had the influence of significant adverse.
The disclosed a kind of electrical desalting and dewatering device of Chinese patent CN2177723Y, battery lead plate plane and electric desalting and dewatering device tank body axially perpendicular, the alternate layout of positive and negative electrode plate.By circuit control, form the half-wave DC highfield between the vertical electrode plate, exchange weak electric field and form between the bottom of battery lead plate and the water-oil interface.The profit compound enters the electric desalting and dewatering device tank body by the feed distributor that is arranged in electric desalting and dewatering device tank base aqueous phase, and rises rapidly, enters weak electric field area by water-oil interface, and then enters the forceful electric power place.Under effect of electric field, the little water droplets coalescence of the saliferous in the profit compound becomes big water droplet, and settles from crude oil, enters the continuous water of electric desalting and dewatering device tank base, discharges at the bottom of jar again; Cleaned crude oil then the condensing funnel by being positioned at electric desalting and dewatering device tank body top from the tank deck discharger.The employing of half-wave electric field, the power consumption of electrical desalting and dewatering device is descended to some extent, but crude oil flow pattern from bottom to top can influence the sedimentation of water droplet in the electric desalting and dewatering device tank body, the employing of the weak electric field voltolisation knot effect of highfield that also can weaken before the highfield, thus desalting and dewatering raw oil efficient influenced.In addition, water charging at the bottom of this device is taked jar can influence the draining water quality of electric desalting and dewatering device.
U.S. Pat P4209374 has proposed a kind of electrodesalting and electrodehydrating technology that adopts the highfield charging of horizontally disposed multilayer planar type battery lead plate.Battery lead plate is switched on respectively, all forms highfield between the battery lead plate; Feed distributor is directly sent into each highfield to the profit compound, or the profit compound is sent into the orlop electric field earlier, again with the orlop electric field not fully the profit compound of desalting and dewatering send into the next stage electric field as charging.Cleaned crude oil is extracted out from the oil outlet that is positioned at electric desalting and dewatering device tank body top, and water is extracted out from the water outlet that is positioned at electric desalting and dewatering device tank body bottom.This electrodesalting and electrodehydrating process adopts the highfield charging, helps the coalescent of water droplet in the profit compound, but its crude oil flow direction from bottom to top has retardation to the sedimentation of water droplet.
U.S. Pat P4374724 and USP4511452 have proposed multistage electrical desalting and dehydration equipment.Described equipment comprises a horizontal electric desalting and dewatering device tank body, and horizontally disposed multilayer planar type battery lead plate is arranged in it, and the length of battery lead plate and width equate substantially with the length and the width of its present position tank body, all form highfield between the adjacent two layers battery lead plate.The profit compound by be positioned at the electric desalting and dewatering device tank body radially on one side first step feed distributor enter the orlop electric field, horizontal flow is extracted out from tank body by being positioned at the relative oil trap on one side with above-mentioned feed distributor of tank body by the crude oil of orlop electric field, again through mixing tank with after fresh water mixes as the charging of next stage electric field, enter the next stage electric field by being positioned at tank body with second stage feed distributor on one side with first step feed distributor; So cycle through some grades of electric fields.Cleaned crude oil is extracted out from tank deck by the oil trap that is positioned at tank body top, and water is extracted out from the water outlet that is positioned at tank base.The problem of this technology is: feed distributor is located at the side of tank interior, and the cleaned crude oil oil trap is located at the top of tank interior.In the tank body from top to bottom the water content of profit compound uprise by low; Be arranged in the profit compound of lower floor's electric field, along with oily water separation, low water content profit compound can pass the upper electrode plate and enter the upper strata electric field, and the high-moisture profit compound that is arranged in the upper strata electric field also can pass the lower electrode plate and enter lower floor's electric field.Therefore, be difficult in the multistage electrodesalting and electrodehydrating that forms between each electric field up and down truly.
Summary of the invention
The present invention is mainly in order to solve the following technical problem that above-mentioned existing various crude oil electro-desalting dehydrators exist respectively simultaneously: the profit compound makes the voltolisation knot effect reduction of forceful electric power place successively by weak electric field area, transition electric field region and forceful electric power place, influences and has reduced desalting and dewatering raw oil efficient; Crude oil flows from bottom to top in the electric desalting and dewatering device tank body, thereby the sedimentation of water droplet in the retardance crude oil has reduced oily water separation efficient; Adopt the multistage electrical desalting and dehydration equipment of the direct charging of highfield, have the back-mixing of different saliferous water content profit compounds between electric fields at different levels; Adopt squirrel-cage electrode assembly or transverse section to be the electric desalting and dewatering device of electrode assembly of the multi-layered electrode of annular, the strength of electric field radial distribution of formed ring electric field is inhomogeneous, influence the desalting and dewatering raw oil effect, and power consumption is higher.
For addressing the above problem, the technical conceive that the present invention proposes is: crude oil electro-desalting dehydrator adopts the direct charging of highfield, the interior crude oil of tank body to adopt uniform electric field along axial horizontal flow, the highfield of tank body.Adopted following two kinds of technical schemes with above-mentioned technical conceive for this reason:
A kind of crude oil electro-desalting dehydrator, comprise a horizontal round tube type tank body, one end of tank body is a profit compound inlet end, the other end is the cleaned crude oil exit end, the top of tank body cleaned crude oil exit end is provided with oil outlet pipe, it is characterized in that: axially be provided with the coalescent district of feed distributor and highfield successively from profit compound inlet end along tank body in the tank body, the coalescent district of highfield is provided with the flat-type pole plate of the axially parallel of at least two floor and tank body, be parallel to each other between each layer battery lead plate, described feed distributor correspondingly is provided with spout respectively with respect to the space between all adjacent two layers battery lead plates in the coalescent district of highfield.
A kind of crude oil electro-desalting dehydrator, comprise a horizontal round tube type tank body, one end of tank body is a profit compound inlet end, the other end is the cleaned crude oil exit end, the top of tank body cleaned crude oil exit end is provided with oil outlet pipe, be provided with feed distributor in the tank body, it is characterized in that: be axially arranged with the coalescent district of highfield from profit compound inlet end along tank body in the tank body, the coalescent district of highfield is provided with the axial vertical flat-type pole plate of at least two floor and tank body, be parallel to each other between each layer battery lead plate, described feed distributor correspondingly is provided with spout respectively with respect to the space between all adjacent two layers battery lead plates in the coalescent district of highfield.
Highfield of the present invention is a crude oil electric desalting dewatering field term commonly used, for weak electric field.In the crude oil electric desalting dewatering technology of petroleum chemical industry, the water content of profit compound is generally 3～10 volume % and (annotates: in the specification sheets of the present invention, % represents volumn concentration with volume), the strength of electric field of existing crude oil electro-desalting dehydrator weak electric field is generally 200～500 volt/cm, and the strength of electric field of highfield is generally 600～1500 volt/cm; In same crude oil electro-desalting dehydrator, the strength of electric field of highfield generally is 2 times of weak electric field strength of electric field.For crude oil electro-desalting dehydrator of the present invention, the strength of electric field of highfield is generally 600～4000 volt/cm.
Adopt the present invention, can obtain following beneficial effect simultaneously:
(1) be provided with the coalescent district of highfield in the crude oil electro-desalting dehydrator of the present invention, in operating process, the profit compound is directly entered in the coalescent district of highfield between all adjacent two layers battery lead plates in the formed highfield by feed distributor.The crude oil electro-desalting dehydrator (as described in CN2159833Y, CN1298922A, CN2177723Y) of existing employing weak electric field (comprising the transition electric field)-highfield feeding manner (also can abbreviate the weak electric field feeding manner as), behind weak electric field, enter the water content in the profit compound of highfield again, generally reduce more than the 85 volume % than the water content that directly enters the profit compound in the highfield.Relation from water droplets coalescence power and water content in crude oil
(be three/biquadratic that F is proportional to x, F is the coalescence force of water droplet under electric field action in the profit compound in the formula, x is the volumn concentration of water in the profit compound) as can be seen, adopt the present invention, generally can make the more above-mentioned existing electric desalting and dewatering device of the electric coalescence force of water droplet in highfield in the profit compound improve more than 10 times that (as water content is that the profit compound of 7 volume % is when directly entering highfield, the coalescence force of water droplet is that water content is the profit compound of 1 volume % 16 times of water droplets coalescence power when entering highfield, be that water content is the profit compound of 0.4 volume % 45 times of water droplets coalescence power when entering highfield), therefore can make the water droplets coalescence speed in the profit compound, coalescent effect and settlement separate speed obviously improve, thereby improve desalting and dewatering raw oil efficient;
(2) structure of crude oil electro-desalting dehydrator of the present invention, can guarantee its in operating process crude oil along the axial horizontal flow of tank body; This will be in embodiment in conjunction with the accompanying drawings.Compare with adopting the electric desalting and dewatering device (as described in CN2177723Y, USP4209374) that descends the crude oil flow mode that outes, eliminated the retardation of rising crude oil, help the settlement separate of water droplet the sedimentation water droplet.In addition, crude oil electro-desalting dehydrator of the present invention can also be eliminated the back-mixing problem of profit compound between the existing electric fields at different levels of multistage electrical desalting and dehydration equipment of USP4374724 and the direct charging of the described employing highfield of USP4511452;
(3) in embodiments more of the present invention, between the cleaned crude oil exit end of coalescent district of highfield and electric desalting and dewatering device tank body along the settlement separate district of being axially arranged with of tank body.Settlement separate district is set, can makes and in the coalescent district of highfield, to continue with parabolic path and crude separation in settlement separate district by settlement separate little water droplet., water-oil interface big at electric desalting and dewatering device tank body internal diameter also can be provided with the multilayer water-accepting board parallel with horizontal plane to tank deck distance when big (for example greater than 500 millimeters) in settlement separate district.In settlement separate district, water-accepting board is set, the maximum settlement distance of water droplet in the crude oil behind in the coalescent district of the highfield voltolisation knot is shortened significantly (when not establishing water-accepting board, the maximum settlement of water droplet distance be from tank deck to jar at the bottom of distance the water; When water-accepting board was set, the maximum settlement of water droplet distance was the distance between the adjacent two layers water-accepting board).With existing crude oil is that the crude oil electric desalting dewatering equipment (as described in CN2159833Y, CN1298922A) of horizontal flow is compared, under the same conditions, for the crude oil horizontal flow stroke of necessity that drops of water fall down provided shortens significantly, the jar of the electric desalting and dewatering device of the necessity that also is drops of water fall down and is provided holds and reduces significantly.In a word, the setting in settlement separate district in the crude oil electro-desalting dehydrator of the present invention, can further improve the efficient of oily water separation in the electric desalting and dewatering device tank body, thereby shorten the residence time of material (comprising crude oil, water and profit compound) in the electric desalting and dewatering device tank body, improve the crude capacity that desalting and dewatering raw oil effect and unit volume jar hold, reduce the facility investment and the running cost of process unit's weight crude oil.
Crude oil electro-desalting dehydrator of the present invention makes it under equal conditions owing to possess the advantage of above-mentioned three aspects simultaneously, and the existing various electrical desalting and dehydration equipments of its electrodesalting and electrodehydrating efficiency ratio are significantly improved.Because water droplets coalescence speed is fast, coalescent effective, disperse the median size of water droplet big in the electric field when median size of water droplet is than employing weak electric field feeding manner in the coalescent district of the highfield crude oil, the specific conductivity of profit compound in the electric field is obviously descended.Simultaneously, the residence time of profit compound in crude oil electro-desalting dehydrator highfield of the present invention is also than the total residence time much shorter of profit compound in the weak electric field of the electric desalting and dewatering device that adopts the weak electric field feeding manner and highfield.Therefore, the power consumption of crude oil electro-desalting dehydrator of the present invention can obviously reduce.In addition, be parallel to each other between each floor battery lead plate in the coalescent district of crude oil electro-desalting dehydrator highfield of the present invention, form uniform electric field between the adjacent two layers battery lead plate, eliminated the described electric desalting and dewatering device of CN2159833Y and CN1298922A and made the uneven problem of strength of electric field radial distribution, helped improving the desalting and dewatering raw oil effect because of forming ring electric field.Also have, adopt the direct feeding manner of feed distributor of the present invention and highfield, can avoid existing crude oil electro-desalting dehydrator (as described in CN2177723Y) to adopt jar end water charging and to the disturbance of water, make reductions such as the draining oleaginousness of crude oil electro-desalting dehydrator and chemical oxygen demand, thereby can reduce the sewage disposal expense.
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is two water bags of a kind of tank body band of the present invention, be provided with one group of axial sectional view with the crude oil electro-desalting dehydrator of the battery lead plate of the axially parallel of tank body and a feed distributor.
Fig. 2 be a kind of tank body of the present invention not with the water bag, be provided with one group of axial sectional view with the crude oil electro-desalting dehydrator of the battery lead plate of the axially parallel of tank body and a feed distributor.
Fig. 3 is two water bags of a kind of tank body band of the present invention, be provided with two groups of axial sectional views with the crude oil electro-desalting dehydrator of the battery lead plate of the axially parallel of tank body and two feed distributors.
Fig. 4 is two water bags of a kind of tank body band of the present invention, be provided with one group of axial sectional view with the crude oil electro-desalting dehydrator of the axial vertical battery lead plate of tank body and a feed distributor.
Fig. 5 be A-A among Fig. 1 to sectional view, illustrated the situation that battery lead plate and horizontal plane be arranged in parallel.
Fig. 6 be A-A among Fig. 1 to sectional view, illustrated the vertically disposed situation of battery lead plate and horizontal plane.
Fig. 7 be A-A among Fig. 1 to sectional view, illustrated battery lead plate to become the situation of arbitrarily angled setting with horizontal plane.
Fig. 8 be E-E among Fig. 4 to sectional view, battery lead plate is circular, with the axial vertical setting of tank body.
Fig. 9 is a kind of and the axial vertically disposed arc battery lead plate of tank body and the synoptic diagram that is provided with in tank body thereof.
Figure 10 be C-C among Fig. 2 to sectional view, illustrated the situation that battery lead plate and horizontal plane be arranged in parallel.
Figure 11 be C-C among Fig. 2 to sectional view, illustrated the vertically disposed situation of battery lead plate and horizontal plane.
Figure 12 be C-C among Fig. 2 to sectional view, illustrated battery lead plate to become the situation of arbitrarily angled setting with horizontal plane.
Figure 13 be B-B among Fig. 1 to sectional view, the water-accepting board that be arranged in parallel with horizontal plane in the settlement separate district is shown.
Figure 14 be D-D among Fig. 2 to sectional view, the water-accepting board that be arranged in parallel with horizontal plane in the settlement separate district is shown.
Figure 15 be A-A among Fig. 1 to sectional view, illustrate this feed distributor when adopting a kind of multilayer spray nozzle type feed distributor one-piece construction and with and the multi-layer electrode plate that be arranged in parallel of horizontal plane between configuration.
Figure 16 be C-C among Fig. 2 to sectional view, illustrate this feed distributor when adopting a kind of porous tubular type feed distributor one-piece construction and with and the multi-layer electrode plate that be arranged in parallel of horizontal plane between configuration.
Figure 17 is the I portion enlarged view among Fig. 1, and feed distributor is the multilayer spray nozzle type.
Figure 18 is the I portion enlarged view among Fig. 1, and feed distributor is the porous tubular type.
Figure 19 is the II portion enlarged view among Fig. 1, and the detailed structure of the downtake that is provided with on the water-accepting board is shown.
Figure 20 is the III portion enlarged view among Fig. 4, and the detailed structure of the distribution disk and the set hole-shaped spout of disc type feed distributor is shown.
Figure 21 distributes the F of disk to view among Figure 20.
Embodiment
As shown in Figure 1, be a kind of crude oil electro-desalting dehydrator of the present invention.It comprises a horizontal round tube type tank body 1, and an end of tank body 1 is a profit compound inlet end (being designated hereinafter simply as inlet end), and the other end is cleaned crude oil exit end (being designated hereinafter simply as exit end).The bottom of tank body 1 has two water bags 12, and the bottom of water bag 12 is respectively equipped with rising pipe 13.In tank body 1, from inlet end along tank body 1 axially be provided with feed distributor 4, the coalescent district 5 of highfield and settlement separate district 7 successively, the top of tank body 1 exit end is provided with oil outlet pipe 10.The exit end of tank body 1 also is provided with baffle plate 11 and gathering room 9.
The coalescent district 5 of highfield is provided with the flat-type pole plate 6 of the axially parallel of multilayer (at least two floor) and tank body 1, is parallel to each other between each layer battery lead plate 6.Among Fig. 1, battery lead plate 6 be arranged in parallel with horizontal plane, referring to Fig. 1 and Fig. 5.Each layer battery lead plate 6 adopts the transparent structure of sedimentation water droplet, as the barrier made from metal bar or metal tube.The insulation of each layer battery lead plate 6 usefulness is supported and (not shown) in the tank body 1 that is fixed on electric desalting and dewatering device is hung in insulation.High voltage electric is introduced in the tank body 1 by the high voltage electric introducing device, is connected (not shown) with each layer battery lead plate 6 on request.The present invention, be used to handle the profit compound that water content is 3～10 volume %, require the strength of electric field between the coalescent district of highfield 5 interior all adjacent two layers battery lead plates 6 to be generally 600～4000 volt/cm, preferable strength of electric field is 700～1500 volt/cm." highfield " of indication of the present invention, the electric field that promptly has above-mentioned numerical range strength of electric field.Because be parallel to each other between each layer battery lead plate, the electric field that forms between the adjacent two layers battery lead plate is uniform electric field.The electric field that forms between the battery lead plate 6 can be an alternating-electric field, also can be DC electric field.Battery lead plate 6 can all be switched on, and also can partly switch on, partial earthing; When part energising, partial earthing, adjacent two-layer battery lead plate must be an energising, a ground connection." the coalescent district of highfield " described in the specification sheets of the present invention promptly is meant by being located at the zone that formed forceful electric power place constitutes between each layer battery lead plate in it and all the adjacent two layers battery lead plates.The number of plies of set battery lead plate 6 then is that the design load by the strength of electric field between the adjacent two layers battery lead plate in the height of the size of crude oil electro-desalting dehydrator tank body internal diameter, transformer output voltage and the coalescent district of highfield decides, and depends on concrete operating process; But two layers of battery lead plate should be set at least.
As shown in Figure 1, feed distributor 4 can adopt multilayer spray nozzle type feed distributor or porous tubular type feed distributor, referring to Figure 15, Figure 16, Figure 17 and Figure 18.Feed distributor 4 correspondingly is provided with multilayer spout 401 (in general, one deck spout being set between the battery lead plate of every adjacent two layers) respectively with respect to the space between all adjacent two layers battery lead plates 6 in the coalescent district 5 of highfield, and every layer of spout can be provided with a plurality of spouts.Spout 401 is between adjacent two layers battery lead plate 6 (referring to Figure 17, Figure 18) all, makes the profit compound can be through spout 401 axially spraying between all adjacent two layers battery lead plates 6 in the formed highfield along tank body 1.Above-mentioned feed distributor can be converted by existing similar feed distributor.In addition, be not limited to use above-mentioned two kinds of feed distributors, can also use the feed distributor of industrial other type commonly used; As long as feed distributor can be through its spout with profit compound axially spraying in the coalescent district of highfield between all adjacent two layers battery lead plates in the formed highfield along the electric desalting and dewatering device tank body.
Among Fig. 1, feed distributor 4 links to each other with feed-pipe 3, and feed-pipe 3 is provided with mixing tank 2.Mixing tank 2 can be mixing valve, static mixer or built-up type mixing tank.
Crude oil electro-desalting dehydrator as shown in Figure 1 is provided with the multilayer flush type water-accepting board 8 parallel with horizontal plane in settlement separate district 7, be equipped with some downtakes 801 on each layer water-accepting board 8.Figure 13 further show above-mentioned water-accepting board 8 with the axial vertical tank body cross section of tank body 1 on structure with situation is set.Referring to Fig. 1 and Figure 19, one section short tube that downtake 801 is provided with below perforate on the water-accepting board 8.Behind the coalescent district 5 of highfield, establish settlement separate district 7, can make and in the coalescent district of highfield, to continue with parabolic path and crude separation in settlement separate district by settlement separate little water droplet., water-oil interface big at electric desalting and dewatering device tank body internal diameter generally also should be provided with above-mentioned water-accepting board to tank deck distance when big (for example greater than 500 millimeters) in settlement separate district.As mentioned before, in settlement separate district 7, water-accepting board 8 is set, can makes the maximum settlement distance shortening significantly of water droplet in the crude oil behind the voltolisation knot in the coalescent district 5 of highfield.It is that liquid-tight flush type metal sheet or non-metal board are made that water-accepting board 8 can adopt material.In settlement separate district 7, each layer water-accepting board 8 should be arranged in parallel with horizontal plane.The number of plies of set water-accepting board 8 is to be determined by the internal diameter of crude oil electro-desalting dehydrator tank body and the distance between the adjacent two layers water-accepting board; Distance between the adjacent two layers water-accepting board is generally 100～2000 millimeters, and preferable distance is 200～500 millimeters.Each layer water-accepting board 8 can adopt method commonly used such as welding, bolt connection to be fixed on the tank body 1.
Crude oil electro-desalting dehydrator shown in Figure 1, its operating process is such: crude oil and water mix the back through mixing tank 2 and form the profit compound, enter feed distributor 4 in the electric desalting and dewatering device tank body 1 through feed-pipe 3, feed distributor 4 through its spout with profit compound axially directly spraying in the coalescent district 5 of highfield between all adjacent two layers battery lead plates 6 in the formed highfield along tank body 1.Under the effect of highfield, the little water droplet in the profit compound is coalescent rapidly.After crude oil flows out from the coalescent district 5 of highfield, along the axial horizontal flow of tank body 1, by settlement separate district 7.Cleaned crude oil (cleaned crude oil refers to reach the crude oil of desalting and dewatering index) effusive from settlement separate district 7 and after water droplet separates fully enters gathering room 9, and discharges tank bodies 1 by oil outlet pipe 10.In the coalescent district 5 of highfield, part water droplet aqueous phase at the bottom of track directly is settled down to jar parabolically.The water droplet of being brought into settlement separate district 7 by crude oil also parabolically track continue to be settled down to each floor water-accepting board 8, on each layer water-accepting board 8, form water.Water on the water-accepting board of upper strata flows on the water-accepting board of one deck under it by downtake 801 with the form of current or big water droplet, so successively descends by downtake, flows into a jar end water by the downtake on the basecoat water-accepting board at last.Among Fig. 1, jar end water is positioned at two water bags 12 of tank body 1 bottom, Reference numeral 14 expression water-oil interface.Two water bag 12 interior jar end water are discharged tank bodies by the rising pipe 13 of being located at water bag bottom respectively.
Crude oil electro-desalting dehydrator shown in Figure 1 can have the variation in some structures and the corresponding operating process, is described as follows.In the settlement separate district 7 of crude oil electro-desalting dehydrator shown in Figure 1, on each layer water-accepting board 8 downtake can be set, but some liquid reducing holes are set; Liquid reducing hole is the perforate of offering on each layer water-accepting board 8.In the operating process, the water on the water-accepting board of upper strata flows on the water-accepting board of one deck under it by liquid reducing hole with the form of current or big water droplet equally, so successively descends by liquid reducing hole, flows into a jar end water by the liquid reducing hole on the basecoat water-accepting board at last.The shape of set downtake 801 cross sections and the shape of liquid reducing hole on the above-mentioned water-accepting board 8 can be multiple shapes such as circular, square.
When the profit mixture moisture content is low (as being lower than 3 volume %), on each layer water-accepting board 8 downtake and liquid reducing hole can also be set.Each layer water-accepting board 8 is that liquid-tight flush type metal or non-metal board are formed by material only at this moment, need be arranged in parallel with horizontal plane equally.In the operating process, drops of water fall down is to each layer water-accepting board, and forms water on each layer water-accepting board; And then water at the bottom of flowing to downwards jar with form two ends axial of current or big water droplet from each layer water-accepting board along tank body.
, water-oil interface less at crude oil electro-desalting dehydrator tank body internal diameter can not be provided with water-accepting board in the settlement separate district 7 during to tank deck distance less (for example less than 500 millimeters).This moment, settlement separate district only was the intravital one section space of electric desalting and dewatering device jar, inner members such as its interior no water-accepting board.Effusive by the coalescent district of highfield, can not be in the coalescent district of highfield settlement separate little water droplet can continue with parabolic path and crude separation in this settlement separate district equally, and water at the bottom of being settled down to jar.
If after the coalescent district of highfield water droplets coalescence is settlement separate, the salt in the crude oil, when water-content can reach requirement, also can not establish settlement separate district.This moment, cleaned crude oil effusive by the coalescent district of highfield 5 and after water droplet separates fully entered gathering room 9, and discharged tank bodies 1 by oil outlet pipe 10.
Baffle plate 11 and gathering room 9 can also be set.This moment, effusive cleaned crude oil with after water droplet separates fully by the coalescent district 5 of highfield or settlement separate district 7 was directly discharged tank bodies 1 by the oil outlet pipe 10 of being located at tank body 1 exit end top.
Crude oil electro-desalting dehydrator shown in Figure 1, the axially parallel of the set flat-type pole plate 6 in the coalescent district of highfield 5 and tank body 1, and be arranged in parallel with horizontal plane, be parallel to each other between each layer battery lead plate 6.In addition, battery lead plate 6 can also along be provided with vertical of direction of the axially parallel of tank body 1 with horizontal plane, or except that and vertical be provided with parallel, become other arbitrarily angled setting with horizontal plane with horizontal plane, still be parallel to each other between each layer battery lead plate 6.If the A-A from Fig. 1 is to analysing and observe, its set-up mode is respectively as Fig. 6, shown in Figure 7.Battery lead plate 6 adopts above-mentioned two kinds when being provided with, the position of the battery lead plate phase configuration that feed distributor 4 need be arranged in parallel from same horizontal plane as shown in figure 15 axially rotates around tank body with each layer battery lead plate, make its each layer spout respectively with respect to the space between all adjacent two layers battery lead plates, and all between the adjacent two layers battery lead plate, so that the profit compound (is schemed slightly) in the formed highfield along axially spraying between all adjacent two layers battery lead plates of tank body through spout.Battery lead plate 6 adopts the crude oil electro-desalting dehydrator as Fig. 6, two kinds of set-up modes shown in Figure 7, the variation of all the other structures and operating process and structure and corresponding operating process, identical with above-mentioned battery lead plate 6 with the crude oil electro-desalting dehydrator that horizontal plane be arranged in parallel.Among Fig. 5, Fig. 6 and Fig. 7, parts such as all not shown feed distributor, feed-pipe.
The crude oil electro-desalting dehydrator tank base is provided with the water bag, mainly is in order to increase the useful volume of tank body, therefore the water bag can be set, also can not establishing the water bag; Can be provided with one when the water bag is set, also can be provided with a plurality of.Crude oil electro-desalting dehydrator shown in Figure 1, the bottom of tank body 1 have two water bags 12, and a jar end water is positioned at water bag 12, and water-oil interface 14 also are positioned at water bag 12.This moment, the bottom of tank body 1 did not have water, each floor water-accepting board 8 in each floor battery lead plate 6 in the coalescent district of highfield 5 and the settlement separate district 7 and feed distributor 4 can be respectively at the axial location of its residing tank body 1 from the tank deck of tank body 1 spatial arrangement to jar end; Referring to Fig. 1, Fig. 5, Fig. 6, Fig. 7, Figure 13 and Figure 15.
A kind of crude oil electro-desalting dehydrator of the present invention shown in Figure 2, structure and crude oil electro-desalting dehydrator shown in Figure 1 are similar; The water bag is not with in the bottom that main difference is a tank body 1, and rising pipe 13 is directly connected in the bottom of tank body 1.In the operating process, the jar end water of tank body 1 bottom is directly discharged tank body by rising pipe 13.Water-oil interface 14 are positioned at the bottom of tank body 1, and water-oil interface are following to be a jar end water.At this moment, each floor water-accepting board 8 in each floor battery lead plate 6 in the coalescent district of its highfield 5 and the settlement separate district 7 and feed distributor 4 all should be respectively at the axial location of its residing tank body 1 from the tank deck of tank body 1 spatial arrangement to the water-oil interface 14, be exactly to place on the water-oil interface 14 in brief; Referring to Fig. 2, Figure 10, Figure 11, Figure 12, Figure 14 and Figure 16.Among Fig. 2, each the floor battery lead plate 6 in the coalescent district 5 of highfield is the flat-type pole plate that is parallel to each other, with the axially parallel of tank body 1; Can be arranged in parallel with horizontal plane (referring to Figure 10), vertical be provided with (referring to Figure 11) with horizontal plane, or except that and vertical be provided with parallel, become other arbitrarily angled setting (referring to Figure 12) with horizontal plane with horizontal plane.Among Figure 10, Figure 11 and Figure 12, parts such as all not shown feed distributor, feed-pipe.Figure 14 shown in the settlement separate district 7 of crude oil electro-desalting dehydrator shown in Figure 2 water-accepting board 8 with the axial vertical tank body cross section of tank body 1 on structure with situation is set, Figure 16 further shown feed distributor 4 among Fig. 2 one-piece construction and with and the multi-layer electrode plate 6 that be arranged in parallel of horizontal plane between configuration.Feed distributor 4 is porous tubular type feed distributor (also can use the feed distributor of multilayer spray nozzle type feed distributor or other type), also places on the water-oil interface 14.Configuration in the coalescent district 5 of feed distributor 4 and highfield between the multi-layer electrode plate 6, the for example setting of the spout of feed distributor between the adjacent two layers battery lead plate, and spout sprays into mode in the highfield between the adjacent two layers battery lead plate with the profit compound, all with the corresponding situation of crude oil electro-desalting dehydrator shown in Figure 1 roughly the same.Among Figure 16, each layer spout 401 and the horizontal plane of feed distributor 4 be arranged in parallel.And be provided with or become under the situation of other arbitrarily angled setting with horizontal plane is vertical with horizontal plane at Figure 11, battery lead plate shown in Figure 12, the direction that is provided with of each layer of reply feed distributor spout changes accordingly, make every layer of spout also become other arbitrarily angled setting, so that it is respectively with respect to the space between all adjacent two layers battery lead plates with the vertical setting of each layer battery lead plate and horizontal plane or with horizontal plane.
The operating process of all the other NM structures of crude oil electro-desalting dehydrator shown in Figure 2 and crude oil electro-desalting dehydrator, and the variation of structure and corresponding operating process, all with crude oil electro-desalting dehydrator shown in Figure 1 and change identical, can be with reference to corresponding relevant explanation.
Crude oil electro-desalting dehydrator shown in Figure 1, highfield is provided with one group of battery lead plate in the coalescent district 5.And a kind of crude oil electro-desalting dehydrator shown in Figure 3 is provided with two arrays of electrodes plate 6 in the coalescent district 5 of highfield, and being provided with all of every group of battery lead plate is identical with the situation of crude oil electro-desalting dehydrator shown in Figure 1.Two arrays of electrodes plate axially arranging successively from the inlet end of tank body 1 along tank body 1, and respectively be provided with a feed distributor 4 along this direction.In operating process, two feed distributors 4 simultaneously through its spout with profit compound axially directly spraying into respectively in the coalescent district 5 of highfield between all the adjacent two layers battery lead plates 6 in the two arrays of electrodes plate in the formed highfield along electric desalting and dewatering device tank body 1.The operating process of all the other NM structures of crude oil electro-desalting dehydrator shown in Figure 3 and electric desalting and dewatering device, and the variation of structure and corresponding operating process, all with crude oil electro-desalting dehydrator shown in Figure 1 and change identical, can be with reference to relevant explanation.Under the bigger situation of crude charging capacity, can adopt crude oil electro-desalting dehydrator shown in Figure 3.
Fig. 1～crude oil electro-desalting dehydrator shown in Figure 3, since its feed distributor 4 and oil outlet pipe 10 from the inlet end of tank body 1 to exit end setting (wherein oil outlet pipe 10 is located at the top of tank body 1 exit end), thereby in operating process, can make the axial horizontal flow of crude oil along tank body 1.
Fig. 1～crude oil electro-desalting dehydrator shown in Figure 3, the battery lead plate in the coalescent district of highfield all with the axially parallel of tank body; And a kind of crude oil electro-desalting dehydrator shown in Figure 4, the axial vertical setting of the battery lead plate in the coalescent district of highfield and tank body is referring to Fig. 4.This crude oil electro-desalting dehydrator comprises a horizontal round tube type tank body 1 equally, and an end of tank body 1 is a profit compound inlet end, and the other end is the cleaned crude oil exit end.The bottom of tank body 1 has two water bags 12, and the bottom of water bag 12 is respectively equipped with rising pipe 13.In tank body 1, from inlet end along tank body 1 be axially arranged with coalescent district 5 of highfield and settlement separate district 7, be provided with feed distributor 4 in the tank body 1, the top of tank body 1 exit end is provided with oil outlet pipe 10.Its settlement separate district 7 is provided with the multilayer flush type water-accepting board 8 parallel with horizontal plane as crude oil electro-desalting dehydrator shown in Figure 1, is equipped with some downtakes 801 on each layer water-accepting board 8.
Crude oil electro-desalting dehydrator shown in Figure 4, the coalescent district 5 of highfield is provided with the axial vertical flat-type pole plate 6 of multilayer (at least two floor) and tank body 1, is parallel to each other between each layer battery lead plate 6.Battery lead plate adopts the transparent structure of sedimentation water droplet equally.The fixing means of each layer battery lead plate 6, with the contents such as strength of electric field between the number of plies, the adjacent two layers battery lead plate 6 of being provided with of being connected of high voltage electric device, energising and/or earthing mode, battery lead plate 6, with crude oil electro-desalting dehydrator shown in Figure 1 roughly the same, can be with reference to relevant explanation.
Crude oil electro-desalting dehydrator shown in Figure 4, feed distributor 4 is the disc type feed distributor, arranges with the center coaxial line of each layer battery lead plate 6.Feed distributor 4 correspondingly is provided with the parallel distribution disk 402 of a plurality of and battery lead plate 6 respectively with respect to the space between all adjacent two layers battery lead plates 6 in the coalescent district of highfield 5, and the excircle of each distribution disk 402 is provided with a plurality of spouts 401 (spout is a hole-shaped); All spouts 401 can spray between all adjacent two layers battery lead plates 6 in the formed highfield profit compound through spout 401 all between adjacent two layers battery lead plate 6 along the direction parallel with battery lead plate 6.Disc type feed distributor 4 and distribute disk 402 structure and and battery lead plate 6 between configuration referring to Fig. 4, Figure 20 and Figure 21.The distribution disk of Figure 20 and disc type feed distributor shown in Figure 21, each distributes what be provided with on the excircle of disk 402 is a plurality of hole-shaped spouts 401; Used " ring box " feed distributor (having aperture around its excircle) of its structure and the described a kind of spherical demineralizer of U.S. Pat P4209374 is similar, can be referring to this patent Fig. 4 and relevant explanation.Except that the spout that hole-shaped can be set, can also distribute the excircle of disk to offer slit around each, form circumferential weld shape spout (figure is slightly); Circumferential weld shape spout can be used for the profit compound is sprayed between all adjacent two layers battery lead plates in the formed highfield along the direction parallel with battery lead plate also between the adjacent two layers battery lead plate equally.In addition, be not limited to use above-mentioned disc type feed distributor, can also use to have the feed distributor of other structure of same function with it.The profit compound is assigned to feed distributor technology between the battery lead plate, is technique known to this area.The structure of feed distributor can have various ways, and the person of ordinary skill in the field can be chosen easily.The illustrated several feed distributors of the present invention, should not be construed as is limitation of the present invention.
The tank body 1 of crude oil electro-desalting dehydrator shown in Figure 4 is as crude oil electro-desalting dehydrator shown in Figure 1, and the bottom of tank body 1 has two water bags 12, and a jar end water is positioned at water bag 12, and water-oil interface 14 also are positioned at water bag 12.This moment, the bottom of tank body 1 did not have water, each floor water-accepting board 8 in each floor battery lead plate 6 in the coalescent district of highfield 5 and the settlement separate district 7 can be respectively at the axial location of its residing tank body 1 from the tank deck of tank body 1 spatial arrangement to jar end, referring to Fig. 4 and Fig. 8 and Figure 13.As seen from Figure 8, with the axial vertical tank body cross section of tank body 1 on, battery lead plate 6 be shaped as circle, disc type feed distributor 4 is arranged with center (being its center of circle) coaxial line of circular electrode plates 6.
Crude oil electro-desalting dehydrator shown in Figure 4, its operating process is such: crude oil and water mix the back through mixing tank 2 and form the profit compound, enter disc type feed distributor 4 in the electric desalting and dewatering device tank body 1 through feed-pipe 3, each distributes a plurality of hole-shaped spouts 401 on disk 402 excircles that the profit compound is directly sprayed in the coalescent district 5 of highfield between all adjacent two layers battery lead plates 6 in the formed highfield along the direction parallel with battery lead plate 6 through it for disc type feed distributor 4.Under the effect of highfield, the little water droplet in the profit compound is coalescent rapidly.After crude oil flows out from the coalescent district 5 of highfield, along the axial horizontal flow of tank body 1, by settlement separate district 7.Effusively from settlement separate district 7 discharge tank bodies 1 by the oil outlet pipe 10 of being located at tank body 1 exit end top with the cleaned crude oil after water droplet separates fully.In the coalescent district 5 of highfield, part water droplet aqueous phase at the bottom of track directly is settled down to jar parabolically.The water droplet of being brought into settlement separate district 7 by crude oil continues to be settled down to each floor water-accepting board 8 and forms water thereon, water on each layer water-accepting board 8 successively descends by downtake 801, flow into the jar end water that is positioned at two water bags 12 at last, the jar end water in the water bag 12 is discharged tank body by rising pipe 13; The drops of water fall down process in above-mentioned settlement separate district and jar end water drainage procedure and crude oil electro-desalting dehydrator shown in Figure 1 are identical.Need to prove that crude oil electro-desalting dehydrator shown in Figure 4, its disc type feed distributor 4 are to spray the profit compound along the direction parallel with battery lead plate 6, injection direction is axial vertical with tank body 1; But since its disc type feed distributor 4 and oil outlet pipe 10 from the inlet end of tank body 1 to exit end setting (wherein oil outlet pipe 10 is located at the top of tank body 1 exit end), thereby in operating process, after the profit compound enters highfield between the adjacent two layers battery lead plate 6, the water droplets coalescence sedimentation, the crude oil flow direction becomes the axial horizontal flow along tank body 1 gradually, shown in the arrow among Fig. 4.In addition, the main difference of crude oil electro-desalting dehydrator shown in Figure 4 and crude oil electro-desalting dehydrator shown in Figure 1, be the shape of battery lead plate in the coalescent district of highfield and setting, feed distributor structure and with the configuration of battery lead plate; All the other NM structures and change all with crude oil electro-desalting dehydrator shown in Figure 1 and change identical.
Crude oil electro-desalting dehydrator shown in Figure 4 also can be as shown in Figure 2 crude oil electro-desalting dehydrator, the water bag is not established in the bottom of its tank body 1, but rising pipe 13 is directly connected in the bottom of tank body 1.In the operating process, the jar end water of tank body 1 bottom is directly discharged tank body by rising pipe 13.Water-oil interface 14 are positioned at the bottom of tank body 1, and water-oil interface are following to be a jar end water.At this moment, each floor battery lead plate 6 in the coalescent district 5 of its highfield and each floor water-accepting board 8 and the disc type feed distributor 4 in the settlement separate district 7 also all should be located on the water-oil interface 14.The accompanying drawing of the crude oil electro-desalting dehydrator of this structure omits, and only figure 9 illustrates its used battery lead plate and battery lead plate in the intravital situation that is provided with of jar.As seen from Figure 9, with the axial vertical tank body cross section of tank body 1 on, in the coalescent district of highfield battery lead plate 6 be shaped as arc; The axial vertical setting of arc battery lead plate 6 and tank body 1 places on the water-oil interface 14.Feed distributor 4 still adopts disc type feed distributor shown in Figure 4, arranges with center (being the mid point of the arch height) coaxial line of the arc battery lead plate 6 of each layer.Other configuration between disc type feed distributor and each layer battery lead plate, for example distribute the setting between the adjacent two layers battery lead plate of disk and spout thereof, and spout sprays into mode in the highfield between the adjacent two layers battery lead plate with the profit compound, the content that also has aspects such as the structure of battery lead plate and battery lead plate are arranged in parallel, with above-mentioned crude oil electro-desalting dehydrator shown in Figure 4 roughly the same, can be with reference to relevant explanation.Water-accepting board in the settlement separate district is located on the water-oil interface, set-up mode and Fig. 2, shown in Figure 14 identical.Explanation to all the other structures of this crude oil electro-desalting dehydrator and operating process is omitted.
Below in conjunction with the accompanying drawings the structure and the operating process of crude oil electro-desalting dehydrator of the present invention had been described in detail.But crude oil electro-desalting dehydrator of the present invention is not limited to the illustrated several concrete structure formation and the variation of some structure formations described in the specification sheets, but can also reasonably carry out other the various possible block constructions or the variation of its array mode, to satisfy various concrete operational requirements.For example, for Fig. 2 and crude oil electro-desalting dehydrator shown in Figure 4, also can be as crude oil electro-desalting dehydrator shown in Figure 3, coalescent district is provided with the two arrays of electrodes plate at highfield, and two feed distributors are set respectively, to satisfy the bigger operation of crude charging capacity.Fig. 2～crude oil electro-desalting dehydrator shown in Figure 4 axially is provided with settlement separate district along tank body between the exit end of coalescent district of highfield and tank body; But according to the explanation that crude oil electro-desalting dehydrator shown in Figure 1 is done, these crude oil electro-desalting dehydrators also can not established settlement separate district.When settlement separate district is set, whether the structure and the set-up mode of water-accepting board, water-accepting board are set in it, and crude oil enters the aspects such as settling process that settlement separate district back W/O drops in settlement separate district by highfield coalescent district outflow, all can produce and the essentially identical variation of crude oil electro-desalting dehydrator shown in Figure 1, can be with reference to relevant explanation.Fig. 2～crude oil electro-desalting dehydrator shown in Figure 4, crude oil electro-desalting dehydrator that also can be as shown in Figure 1 is the same, at the exit end of tank body baffle plate and gathering room is set.As for various crude oil electro-desalting dehydrator tank body exit end of the present invention whether baffle plate and gathering room are set, also have tank base whether the water bag is set, the contents such as quantity of water bag are set, and the variation in the crude oil electro-desalting dehydrator structure, arrangements of components and the operating process that produce therefrom, all belong to those skilled in the art known or according to the present invention the relevant explanation in the specification sheets and understandable content.More than just the variation of crude oil electro-desalting dehydrator structure formation of the present invention has been carried out some and illustrated, do not got rid of the technology general knowledge in parts, utilization present technique field of the different shape that adopts specification sheets of the present invention to mention, structure, quantity or enlightenment of the present invention and carry out other various rational combinations and obtain the crude oil electro-desalting dehydrator that other structure formation changes.
Various crude oil electro-desalting dehydrators described in the specification sheets of the present invention, the battery lead plate of different shape all adopts the flat-type pole plate (for example barrier made from metal bar or metal tube) of the penetrable structure of sedimentation water droplet in the coalescent district of highfield, parallel mutually between each layer battery lead plate, between the adjacent two layers battery lead plate, to form even strong highfield.Described various crude oil electro-desalting dehydrator, battery lead plate is connected and energising and/or earthing mode etc. with the high voltage electric introducing device, all can carry out in the usual way, specification sheets of the present invention has carried out concise and to the point illustrating (referring to the explanation of the crude oil electro-desalting dehydrator that battery lead plate shown in Figure 1 and horizontal plane are be arranged in parallel) to it.About the high voltage electric introducing device and and the accompanying drawing of battery lead plate junction circuit all omit.
Each operating parameters of crude oil electro-desalting dehydrator of the present invention, remove strength of electric field and the existing crude oil electro-desalting dehydrator that adopts the direct charging of highfield (USP4209374 for example, USP4374724 and USP4511452 are described) same or similar outside, all the other each operating parameterss are temperature for example, water injection rate, the emulsion splitter applicable cases, profit mixture strengties etc. are all with the existing crude oil electro-desalting dehydrator that adopts the weak electric field charging (CN2159833Y for example, CN1298922A and CN2177723Y are described) and the existing crude oil electro-desalting dehydrator that adopts the direct charging of highfield (USP4209374 for example, USP4374724 and USP4511452 are described) same or similar.
In the Figure of description of the present invention, all identical Reference numerals are all represented identical parts among Fig. 1～Figure 21.Among each figure of Fig. 2～Figure 21, the represented parts of all unaccounted Reference numerals all with Fig. 1 or other relevant each figure in the represented parts of same reference numerals identical.Except that specification sheets of the present invention has the explanation in addition, the represented same parts of same reference numerals has essentially identical structure and effect.In the relevant accompanying drawing of Fig. 1～Figure 21, represent direction or the crude oil flow direction of profit compound by the feed distributor ejection with arrow.
Various crude oil electro-desalting dehydrator of the present invention is mainly used in the crude oil electric desalting dewatering process of petroleum chemical industry.
Claims (4)
1, a kind of crude oil electro-desalting dehydrator, comprise a horizontal round tube type tank body (1), one end of tank body (1) is a profit compound inlet end, the other end is the cleaned crude oil exit end, the top of tank body (1) cleaned crude oil exit end is provided with oil outlet pipe (10), be provided with feed distributor (4) in the tank body (1), it is characterized in that: be axially arranged with the coalescent district of highfield (5) from profit compound inlet end along tank body (1) in the tank body (1), the coalescent district of highfield (5) is provided with the axial vertical flat-type pole plate (6) of at least two floor and tank body (1), each layer battery lead plate is parallel to each other between (6), the electric field that forms between the adjacent two layers battery lead plate (6) is a uniform electric field, strength of electric field is 600～4000 volt/cm, and described feed distributor (4) correspondingly is provided with spout (401) respectively with respect to the space between interior all the adjacent two layers battery lead plates (6) in the coalescent district of highfield (5).
2, crude oil electro-desalting dehydrator according to claim 1 is characterized in that: be axially arranged with settlement separate district (7) along tank body (1) between the cleaned crude oil exit end of coalescent district of highfield (5) and tank body (1).
3, crude oil electro-desalting dehydrator according to claim 2 is characterized in that: be provided with the flush type water-accepting board (8) parallel with horizontal plane in the described settlement separate district (7).
4, crude oil electro-desalting dehydrator according to claim 3 is characterized in that: water-accepting board (8) is provided with downtake (801) or liquid reducing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410075323 CN1233793C (en) | 2003-07-18 | 2003-07-18 | Electric desalting dewatering device for crude oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410075323 CN1233793C (en) | 2003-07-18 | 2003-07-18 | Electric desalting dewatering device for crude oil |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03126263 Division CN1208111C (en) | 2003-07-18 | 2003-07-18 | Electric dewatering and desalting appliance for crude oil |
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| CN1605615A CN1605615A (en) | 2005-04-13 |
| CN1233793C true CN1233793C (en) | 2005-12-28 |
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| CN 200410075323 Expired - Fee Related CN1233793C (en) | 2003-07-18 | 2003-07-18 | Electric desalting dewatering device for crude oil |
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| CN100366707C (en) * | 2006-07-07 | 2008-02-06 | 中国石油化工集团公司 | Electric desalting and dewatering device |
| CN100355864C (en) * | 2006-07-07 | 2007-12-19 | 中国石油化工集团公司 | Electric desalting and dewatering tank |
| CN101191076B (en) * | 2006-12-06 | 2010-12-22 | 辽宁石油化工大学 | Combined electrode electric desalting dewatering equipment |
| 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 |
| CN112779047B (en) * | 2019-11-07 | 2023-05-23 | 中国石油化工股份有限公司 | Electrode plate and electric desalting tank |
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