Oil-water feeding distributor for enhancing desalting and dewatering effects of crude oil

Abstract

The utility model relates to the technical field of crude oil electro-desalting, in particular to an oil-water feeding distributor for strengthening crude oil desalting and dewatering effects, which comprises a feeding main pipe and a plurality of distributing heads which are arranged side by side at intervals and are provided with inner cavities, and stuffing boxes for vertically dividing the inner cavities into distributing cavities and feeding cavities are arranged in the centers of the distributing heads. A plurality of corrugated plates which are arranged side by side at intervals are arranged in the stuffing box, the upper end and the lower end of a clamping cavity between every two adjacent corrugated plates are correspondingly communicated with a distribution cavity and a feeding cavity respectively, the feeding cavity is correspondingly communicated with a feeding main pipe through a feeding branch pipe, and a plurality of distribution holes are formed in the outer cavity wall of the distribution cavity; according to the oil-water feeding distributor, the oil-water separation effect can be enhanced by increasing the diameter of water drops entering an electric desalting tank.

Description

TECHNICAL FIELD

[0001] The utility model relates to crude oil electric desalting technical field especially is related to a kind of oil-water feed distributor of enhanced crude oil desalination dehydration effect. BACKGROUND

[0002] It is known that crude oil electric desalination dehydration effect is influenced by multiple factors such as crude oil properties, water injection volume, water injection quality, electric field intensity, oil-water mixture tank entry mode, wherein the main function of oil-water feed distributor installed in crude oil electric desalination tank is to horizontally and uniformly disperse oil-water mixture in water phase or electric field at a certain height in electric desalination tank, which is one of main structures for electric desalination tank to realize good desalination dehydration effect;For example, a kind of new electric desalination electric dehydration oil inlet distributor is disclosed in Chinese utility model patent with announcement number CN201538757U, its oil inlet distribution pipe and oil inlet distribution groove main body are H-shaped, small holes are uniformly opened on its oil inlet distribution groove upper surface, its purpose is to make crude oil more uniformly enter high-voltage electric field in electric desalination electric dehydration tank, increase distribution surface of crude oil in electric field, and in the case of corrosion of oil inlet distributor, it can be conveniently disassembled and replaced, but it does not have the function of enhancing desalination dehydration effect;With continuous heavy and poor quality of crude oil, conventional electric desalination device is difficult to meet the requirement of heavy and poor quality crude oil for deep desalination, and enhancing dehydration function of oil-water feed distributor undoubtedly has good promoting effect for improving desalination dehydration effect of heavy and poor quality crude oil. CONTENT OF UTILITY MODEL

[0003] In order to overcome the deficiency in the background art, solve the existing technical problems, the utility model discloses an oil-water feed distributor for enhancing crude oil desalination dehydration effect, which can enhance oil-water separation effect by increasing the diameter of water droplets entering the electric desalination tank.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] An oil-water feed distributor for enhancing crude oil desalination dehydration effect, comprising a feed main pipe and a plurality of distribution heads spaced side by side and having inner cavities, a filler box is arranged in the center of the distribution head to divide the inner cavities into distribution cavities and feed cavities, a plurality of corrugated plates are arranged in the filler box and spaced side by side, the upper end and the lower end of the cavity between the adjacent two corrugated plates are respectively communicated with the distribution cavities and the feed cavities, the feed cavities are communicated with the feed main pipe through feed branch pipes, and a plurality of distribution holes are arranged on the outer cavity wall of the distribution cavities.

[0006] Further, the surface of the corrugated plate is provided with a hydrophilic layer.

[0007] Further, tear holes are arranged at the valleys of the corrugated plates.

[0008] Further, the interval between two adjacent corrugated plates is 8-15mm, and the angle between the corrugated plate and the horizontal plane is 50-80 degrees.

[0009] Further, two corrugated plate groups are symmetrically arranged in the filler box, each corrugated plate group comprises a plurality of spaced corrugated plates arranged side by side, and a feed clamp cavity communicating with the feed cavity is arranged between the two corrugated plate groups.

[0010] Further, the distribution head is in a strip shape, the cross section of the feed cavity is in an inverted trapezoidal shape, and the feed branch pipe is connected to the central cavity wall of the bottom of the feed cavity.

[0011] Further, the distribution cavity comprises three cavities corresponding to the top surface and the two side surfaces of the filler box respectively, and a plurality of distribution hole groups are arranged on the outer wall of each cavity, and each distribution hole group is uniformly spaced along the length direction of the distribution head.

[0012] Further, the total cross-sectional area of the distribution holes is 1.1-1.5 times the flow cross-sectional area of the feed main pipe.

[0013] Due to the adoption of the technical scheme as described above, the oil-water feed distributor for enhancing the desalting and dewatering effect of crude oil has the following beneficial effects:

[0014] The oil-water feed distributor for enhancing the desalting and dewatering effect of crude oil disclosed by the utility model can realize the uniform distribution of the oil-water mixture at a certain height in the electric desalting tank, reduce the disturbance to the oil phase and the water phase as much as possible, rely on the coalescence of small water droplets on the surface of the corrugated plate filler, and increase the collision probability of the water droplets when the oil-water mixture flows through the wave crest and the wave trough of the corrugated plate, so that the rapid growth of the small water droplets is realized in the oil-water feed distributor, the diameter of the water droplets entering the electric desalting tank is increased, and the oil-water separation effect of the electric desalting tank is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the implementation structure schematic view of the utility model;

[0016] Figure 2 is the top view structure schematic view of Figure 1 ;

[0017] Figure 3 is the side view structure schematic view of Figure 1 ;

[0018] Figure 4 is the installation connection structure schematic view of the filler box.

[0019] In the figure: 1, feed main pipe; 2, feed branch pipe; 3, distribution head; 301, distribution hole; 302, distribution cavity; 303, feed cavity; 4, filler box; 401, corrugated plate; 402, tear hole; 403, feed clamp cavity. DETAILED DESCRIPTION

[0020] The technical scheme of the utility model will be described below with reference to the accompanying drawings of the utility model embodiments. It should be understood in the description that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "back", "left", "right" only corresponds to the accompanying drawings of the utility model, and is for the convenience of describing the utility model, not indicating or implying that the indicated device or element must have a specific orientation: Embodiment one:

[0021] In combination with the accompanying drawings Figures 1-4 The oil-water feed distributor for strengthening the desalting and dewatering effect of crude oil comprises a feed main pipe 1 and a plurality of distribution heads 3 which are spaced and arranged side by side and have inner cavities. A filler box 4 is arranged in the center of the distribution head 3 to divide the inner cavity into a distribution cavity 302 and a feed cavity 303, so that the oil-water entering the feed cavity 303 must pass through the filler box 4 to enter the distribution cavity 302. Specifically, a transverse partition plate can be arranged at the lower end of the inner cavity of the distribution head 3 to first separate the lower feed cavity 303, and then the filler box 4 is fixed to the middle part of the upper plate surface of the transverse partition plate. Thus, the inner cavity of the distribution head 3 above the transverse partition plate, except for the filler box 4, forms the distribution cavity 302. The feed cavity 303 is in communication with the feed main pipe 1 through a feed branch pipe 2. The outer cavity wall of the distribution cavity 302 is provided with a plurality of distribution holes 301. The total cross-sectional area of the distribution holes 301 is 1.1-1.5 times the flow cross-sectional area of the feed main pipe 1, so as to ensure that the oil-water sent by the feed main pipe 1 can be smoothly and uniformly sprayed from the distribution holes 301, avoiding excessive spray disturbance. According to the need, the distribution head 3 has an elongated structure, and a plurality of distribution heads 3 are arranged side by side, which can adapt to the shape of the electric field area in the electric desalting tank. The cross section of the feed cavity 303 is in the shape of an inverted trapezoid, and the included angle between the inclined edge of the inverted trapezoid and the horizontal plane is 30-70 degrees, preferably 45-60 degrees. The feed branch pipe 2 is connected to the central cavity wall at the bottom of the feed cavity 303, so as to ensure that the oil-water entering the feed cavity 303 can be uniformly dispersed. In addition, the distribution cavity 302 comprises three cavities corresponding to the top surface and the two side surfaces of the filler box 4 respectively, and each cavity is provided with a plurality of distribution hole groups on the outer wall. Each distribution hole group is uniformly and spacedly provided with a plurality of distribution holes 301 along the length direction of the distribution head 3, so that the oil-water sprayed from the distribution holes 301 can be sprayed in two directions of horizontal and vertical upward, and uniformly distributed on the cross section at a certain height of the electric desalting tank.

[0022] The filler box 4 is provided with a plurality of corrugated plates 401 arranged in parallel at intervals, the interval between the adjacent two corrugated plates 401 is 8-15 mm, which can increase the collision effect of oil and water drops, the upper end and the lower end of the cavity between the adjacent two corrugated plates 401 are respectively communicated with the distribution cavity 302 and the feeding cavity 303, which ensures that the sprayed oil and water must pass through the corrugated plate 401, and the positions corresponding to the lower end of the cavity between the adjacent two corrugated plates 401 on the partition plate and the lower wall of the filler box 4 are punched, and the positions corresponding to the upper end of the cavity between the adjacent two corrugated plates 401 on the other walls of the filler box 4 are punched; according to the need, the surface of the corrugated plate 401 is provided with a hydrophilic layer, which can increase the oil and water gathering effect; in addition, the corrugated plate 401 is provided with a tear hole 402 at the wave trough, and the water drops of a certain volume can pass through the tear hole 402 to the other side of the corrugated plate 401 and realize the wetting of the surface on the other side, which can also strengthen the adsorption and coalescence of water drops to a certain extent.

[0023] In the process of crude oil electric desalting, the small water droplets dispersed in the crude oil in an emulsified state contain more ions. Under the action of electric field force, the surface of the small water droplets is charged, and repeated distortion occurs, which breaks the protective film on the surface of the emulsified water droplets, and the water droplets collide with each other to form larger water droplets, which are separated from the crude oil by density difference, so as to achieve the purpose of desalination and dehydration. The dipole coalescence force between the small water droplets is related to the dielectric constant of the crude oil, the electric field strength, the water droplet radius and the water droplet center distance. Under the determined properties of the crude oil and the electric desalting working condition, the only way to increase the water droplet coalescence force is to increase the water droplet radius. The oil-water feeding distributor for strengthening the desalination and dehydration effect of the crude oil of the utility model is used before the crude oil and the washing water are strongly mixed and enter the electric field area of the electric desalting tank. The oil-water mixture flows through the corrugated plate 401 filler, and the small water droplets suspended in the crude oil will collide with the wave crest and the wave trough of the corrugated plate 401 in the forward direction, which increases the probability of water droplet collision and growth. The coalescence and collision of the strong hydrophilic corrugated plate 401 filler in the distribution head 3 of the oil-water distributor increase the water droplet radius entering the electric field area, thereby increasing the coalescence force between the water droplets. The large water droplets coalesced for the first time enter the water phase located in the lower part of the electric desalting tank due to the large density, and the emulsified oil phase carrying the small water droplets uniformly passes through the electric field area upward, and the oil-water secondary separation is realized under the action of the electric field force, which significantly enhances the overall desalination and dehydration effect of the electric desalting tank of the crude oil. Example two:

[0024] On the basis of example one, as shown in the accompanying drawings Figure 4As shown, two corrugated plate groups are symmetrically arranged in the filler box 4, each of which contains a plurality of spaced and side-by-side corrugated plates 401, and a feed clamping cavity 403 communicating with the feed cavity 303 is arranged between the two corrugated plate groups. The feed clamping cavity 403 is formed by two vertical clamping plates, and a flow hole is arranged on the plate surface between the two clamping plates, so that the feed clamping cavity 403 can communicate with the feed cavity 303. The clamping plate can be used to stably fix the corrugated plate 401. When the included angle between the corrugated plate 401 and the horizontal plane is 50-80 degrees, generally 60-75 degrees, the lower end of the clamping cavity between the two adjacent corrugated plates 401 corresponds to the clamping plate surface. A hole is opened on the corresponding clamping plate surface to ensure that the lower end of the clamping cavity between the two corrugated plates 401 communicates with the feed cavity 303. The design structure can avoid the formation of dead zones in the distribution head 3 of the oil-water mixture, fully and completely play the overall coalescing effect of the corrugated plate 401 filler, and prevent a small amount of sand and solid impurities in the crude oil from causing the distribution head 3 to be blocked.

[0025] The part not described in detail of the utility model is the prior art. For those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the above embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model, and any reference signs in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. An oil-water feed distributor for enhancing the desalting and dewatering effect of crude oil, characterized by: The utility model relates to a kind of distribution heads, comprising feed main pipe (1) and multiple distribution heads (3) with inner cavity spaced and side by side, the central part of the distribution head (3) is equipped with filler box (4) that divides inner cavity into distribution cavity (302) and feed cavity (303) up and down, multiple corrugated plates (401) spaced and side by side are equipped in the filler box (4), the upper end and the lower end of cavity between two adjacent corrugated plates (401) are respectively communicated with distribution cavity (302) and feed cavity (303) corresponding, the feed cavity (303) is communicated with feed main pipe (1) by feed branch pipe (2) corresponding, and outer cavity wall of the distribution cavity (302) is equipped with multiple distribution holes (301).

2. The oil-water feed distributor for enhanced crude oil desalting and dewatering effectiveness according to claim 1, characterized by: The plate surface of the corrugated plate (401) is provided with a hydrophilic layer.

3. The oil-water feed distributor for enhanced desalting and dewatering of crude oil as claimed in claim 1, wherein: The corrugated plate (401) is provided with a tear hole (402) at the trough.

4. The oil-water feed distributor for enhanced crude oil desalting and dewatering effectiveness of claim 1, characterized by: The distance between the two adjacent corrugated plates (401) is 8-15mm, and the angle between the corrugated plate (401) and the horizontal plane is 50-80 degrees.

5. The oil-water feed distributor for enhanced desalting and dewatering of crude oil as claimed in claim 1, wherein: Two corrugated plate groups are symmetrically arranged in the filler box (4), each corrugated plate group comprises multiple corrugated plates (401) spaced and side by side, and a feed cavity (303) is arranged between the two corrugated plate groups.

6. The oil-water feed distributor for enhanced crude oil desalting and dewatering effectiveness of claim 1, characterized by: The distribution head (3) is a long strip structure, the feed cavity (303) is a reverse trapezoidal cross section, and the feed branch pipe (2) is connected to the central part of the bottom cavity wall of the feed cavity (303).

7. The oil-water feed distributor for enhanced desalting and dewatering of crude oil as claimed in claim 6, characterized in that: The distribution cavity (302) comprises three cavities corresponding to the top surface and the two side surfaces of the filler box (4) respectively, and each cavity is provided with multiple distribution hole groups on the outer wall, and each distribution hole group is uniformly spaced and provided with multiple distribution holes (301) along the length direction of the distribution head (3).

8. The oil-water feed distributor for enhanced crude oil desalting and dewatering effectiveness of claim 1, characterized by: The total cross-sectional area of all distribution holes (301) is 1.1-1.5 times the flow cross-sectional area of the feed main pipe (1).

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