CN116651023B - Diesel dehydration device and application method thereof - Google Patents

Abstract

The invention relates to the technical field of petroleum processing, in particular to a diesel dehydration device and a using method thereof. The diesel oil dehydration device comprises a cylindrical shell, a cylindrical coalescence filter core cavity and an annular electrostatic coalescence cavity are coaxially arranged in the shell, a water removal area is arranged in the electrostatic coalescence cavity, the coalescence filter core cavity is communicated with an oil inlet pipe, a coalescence filter core mechanism is arranged in the coalescence filter core cavity, the top of the coalescence filter core cavity is communicated with the electrostatic coalescence cavity, an electrostatic generation mechanism is arranged in the electrostatic coalescence cavity, the electrostatic generation mechanism comprises an outer electric plate and an inner electric plate which are connected with a power supply and opposite in electrical property, a water removal layer is arranged in the water removal area and communicated with an oil outlet pipe, drainage cavities are formed in the bottoms of the coalescence filter core cavity and the electrostatic coalescence cavity, and the drainage cavities are connected with a drain pipe. The invention has compact structure and small occupied area, adopts the coalescing filter element mechanism to perform primary coalescence, adopts the static generating mechanism to perform secondary coalescence, and finally obtains the high-quality diesel oil with low water content through the water removal layer for removing water.

Description

Diesel dehydration device and application method thereof

Technical Field

The invention relates to the technical field of petroleum processing, in particular to a diesel dehydration device and a using method thereof.

Background

Diesel is one of the main products of petroleum processing because the raw oil contains moisture and steam is used in the processing process, so that the processed diesel also contains a small amount of moisture. Diesel is mainly used as fuel oil, and the water content is very strict, so that the diesel needs to be dehydrated.

The invention patent with the application number of CN201510321361.0 discloses a diesel dehydration device, which comprises: the oil outlet of the prefilter is connected with the oil inlet of the coalescing separator; the coalescing separator comprises: the novel filter comprises a central distributing pipe, a coalescing filler layer, a coalescing filter element layer, a filtering separator and a salt layer, wherein the central distributing pipe is connected with an oil inlet of the coalescing separator, the coalescing filler layer is arranged on the periphery of the central distributing pipe, the coalescing filter element layer is arranged on the periphery of the coalescing filler layer, the filtering separator is connected with an oil outlet of the coalescing separator, and the salt layer is arranged in the filtering separator. The technical proposal has the advantages of integrating coalescence, coalescence filtration, filtration separation, salt drying and the like, and has the advantages of low investment, short flow and the like, but has the following disadvantages:

1. the inside of the coalescing separator is provided with a coalescing filler layer and a coalescing filter element layer, and also provided with a filtering separator which can be independently used, so that the volume requirement on the coalescing separator is increased, and the occupied area of the coalescing separator is also increased;

2. only through coalescence filter core and coalescence filler carry out coalescence dewatering, and the effect of coalescence dewatering is limited, leads to the diesel oil that gets into in the filtration separator still to contain more moisture, and salt layer water absorption pressure is big, needs frequent change, otherwise does not reach the dehydration requirement.

In view of the foregoing, it is highly desirable to provide a diesel dehydration device that is compact in structure, highly efficient in dehydration, and simple in operation.

Disclosure of Invention

In order to solve at least one of the technical problems, the invention provides a diesel oil dewatering device, which comprises a cylindrical shell, wherein a cylindrical coalescence filter core cavity and an annular electrostatic coalescence cavity are coaxially arranged in the shell, a dewatering area is arranged in the electrostatic coalescence cavity, the coalescence filter core cavity is communicated with an oil inlet pipe, a coalescence filter core mechanism is arranged in the coalescence filter core cavity, the top of the coalescence filter core mechanism is communicated with the electrostatic coalescence cavity, an electrostatic generation mechanism is arranged in the electrostatic coalescence cavity, the electrostatic generation mechanism comprises an outer electric plate and an inner electric plate which are connected with a power supply and are opposite in electrical property, the dewatering area is communicated with an oil outlet pipe, a dewatering layer is arranged in the dewatering area, and drainage cavities are respectively arranged at the bottoms of the coalescence filter core cavity and the electrostatic coalescence cavity and are connected with a drainage pipe.

Preferably, the coalescing filter element mechanism comprises a water filtering plate arranged at the bottom of the coalescing filter element cavity and a cylindrical coalescing filter element arranged on the water filtering plate, the coalescing filter element divides the coalescing filter element cavity into an oil inlet cavity and a coalescing cavity from inside to outside, the top of the oil inlet cavity is sealed, the bottom of the oil inlet cavity is communicated with the oil inlet pipe, an annular coalescing filter plate is arranged above the coalescing filter plate, a permeation cavity is arranged above the coalescing filter plate, and the outer side wall of the permeation cavity is a hydrophobic membrane through which only oil passes; a cylindrical first drainage cavity is arranged below the water filtering plate and connected with the drain pipe.

Preferably, a closed installation cavity is arranged at the top of the oil inlet cavity, a servo motor is arranged in the installation cavity, a ribbon-shaped helical blade is arranged in the oil inlet cavity, and the helical blade is connected with the output end of the servo motor; the spiral blade comprises a blade body, a plurality of crushing holes are formed in the blade body, each crushing hole comprises a first conical hole, a cylindrical hole and a second conical hole which are sequentially connected, each first conical hole and each second conical hole are communicated with a cylinder Kong Jiansu, a plurality of downward inclined spines are vertically and equidistantly arranged on two sides of the blade body, a rotating shaft is fixedly arranged at the top of the blade body, and the rotating shaft is connected with the output end of the servo motor.

Preferably, the electrostatic generating mechanism comprises a circular outer electric plate, an inner electric plate and a ceramic separating mechanism, the outer electric plate and the inner electric plate are coaxially arranged at intervals to form the electrostatic coalescing cavity, the separating mechanism, the shell and the hydrophobic membrane are jointly enclosed to form an annular homogenizing cavity, the circumference of the electrostatic coalescing cavity is equally divided into a plurality of coalescing strengthening areas and dewatering areas which are adjacent to each other and are communicated with each other by the separating mechanism, and the upper part of the coalescing strengthening areas is communicated with the homogenizing cavity.

Preferably, the separation mechanism comprises an annular upper baffle plate and an annular lower baffle plate, and vertical side baffle plates are arranged between the upper baffle plate and the lower baffle plate at equal intervals in circumference; the side baffle is provided with a flow hole, the upper baffle is provided with a plurality of oil inlets which are communicated with the coalescence reinforcing area and the homogenization cavity, the bottom of the lower baffle is coaxially provided with a first annular wall and a second annular wall at intervals, the first annular wall, the lower baffle and the shell jointly enclose into an annular oil outlet cavity, the first annular wall, the second annular wall, the lower baffle and the shell jointly enclose into an annular second water outlet cavity, the oil outlet cavity is communicated with the water removal area and the oil outlet pipe, and the second water outlet cavity is communicated with the coalescence reinforcing area and the water outlet pipe.

Preferably, the outer electrode plate comprises an outer electrode plate, an outer insulating layer is arranged on the outer side wall of the outer electrode plate, an outer conducting strip is arranged on the inner side wall of the outer electrode plate, the inner electrode plate comprises an inner electrode plate, an inner insulating layer is arranged on the inner side wall of the inner electrode plate, an inner conducting strip is arranged on the outer side wall of the inner electrode plate, the outer conducting strip and the inner conducting strip are all arranged in the coalescence strengthening area, the outer conducting strip and the inner conducting strip are arranged in a plurality of the coalescence strengthening areas in a vertical equidistant staggered mode, and are inclined downwards, two rows of circulating holes are formed in the side baffle, each circulating hole in one row is arranged between two adjacent outer conducting strips, and each circulating hole in the other row is arranged between two adjacent inner conducting strips.

Preferably, the water removal layer is clung to the side baffle plate, the water removal layer comprises a hydrophobic insulating wall material for diesel oil to pass through, the hydrophobic insulating wall material is provided with a hollow inner cavity, the hollow inner cavity is filled with industrial salt, two water removal layers arranged at intervals are arranged in each water removal area, and the oil outlet cavity is communicated with the area between the two water removal layers.

Preferably, the ultrasonic interface meter is arranged in the first drainage cavity and the second drainage cavity respectively, the drainage pipe comprises a drainage main pipe, a first drainage branch pipe and a second drainage branch pipe, a first electric valve is arranged on the oil inlet pipe, a second electric valve is arranged on the first drainage branch pipe, a third electric valve is arranged on the second drainage branch pipe, and the ultrasonic interface meter, the first electric valve, the second electric valve, the third electric valve and the servo motor are all connected with the PLC controller, and the bottom of the shell is provided with supporting legs.

Preferably, the ultrasonic interface meter comprises a conduit, a sealing plug and a processing module which are sequentially connected from top to bottom, wherein a plurality of overflow holes are formed in the side wall of the conduit, a first limiting ring is arranged at the top of the conduit, a second limiting ring is arranged below the interior of the conduit, a floating ball is arranged between the first limiting ring and the second limiting ring, the density of the floating ball is between water and diesel oil, the outer surface of the floating ball is an ultrasonic reflection surface, an ultrasonic transceiver is arranged below the second limiting ring, the receiving and transmitting end of the ultrasonic transceiver faces the floating ball, the other end of the ultrasonic transceiver penetrates through the sealing plug to be connected with the processing module, and the processing module is connected with a PLC.

The invention provides a use method of a diesel dehydration device, which comprises the following steps:

step S100, pumping diesel oil into an oil inlet pipe, entering a coalescing filter element cavity in a shell through the oil inlet pipe, converging water in the diesel oil into large-particle liquid drops by a coalescing filter element mechanism in the coalescing filter element cavity, depositing the large-particle liquid drops at the bottom of the coalescing filter element cavity, and performing primary coalescence on the diesel oil;

step 200, enabling diesel oil subjected to primary coalescence to enter an annular electrostatic coalescence cavity adjacent to the primary coalescence filter core cavity from the top of the primary coalescence filter core cavity, enabling residual moisture in the diesel oil to be converged into large-particle liquid drops under the action of electrostatic charge by an electrostatic generation mechanism, depositing the large-particle liquid drops at the bottom of the electrostatic coalescence cavity, and performing secondary coalescence on the diesel oil;

step S300, enabling the diesel oil subjected to secondary coalescence to enter a water removal area in the electrostatic coalescence cavity, entering an oil outlet pipe after passing through a water removal layer in the water removal area, and enabling the diesel oil to flow out of a shell from the oil outlet pipe to obtain finished diesel oil;

step S400, when the accumulated water in the drainage chambers at the bottom of the coalescing filter element chamber and the electrostatic coalescing chamber reaches a certain value, the accumulated water is drained from the drainage pipe.

Compared with the prior art, the invention has the following beneficial technical effects:

1. according to the invention, the two-stage coalescence is carried out on the diesel oil by adopting the coalescence filter element mechanism and the static electricity generation mechanism, so that the moisture in the diesel oil can be fully coalesced and settled, and the water removal area is arranged in the static electricity coalescence cavity, so that the residual trace moisture can be removed through the water removal layer during static electricity coalescence, the water removal effect is further improved, the diesel oil with low moisture content is obtained, and the quality of the diesel oil is improved;

2. the coalescing filter core cavity and the electrostatic coalescing cavity are adjacent cylindrical and annular, so that the structure is compact, and the occupied area is small;

3. the coalescing filter element divides the coalescing filter element cavity into an oil inlet cavity and a coalescing cavity, the coalescing filter element plays a role in coalescing moisture in diesel oil on one hand, and plays a role in stabilizing flow on the other hand, so that the diesel oil flowing in the oil inlet cavity is in a stable state after entering the coalescing cavity, a water layer in the diesel oil is sunk, the oil layer is raised, and the diesel oil on the upper layer passes through a coalescing filter plate and then enters a permeation cavity to further coalesce the moisture in the diesel oil; the hydrophobic membrane in the permeation cavity blocks water, so that the water content of diesel oil flowing to the electrostatic coalescence cavity is reduced;

4. the spiral blades are arranged in the coalescing filter element mechanism, when the spiral blades rotate, an oil layer can be promoted to rise, a water layer is sunk, the oil-water separation efficiency is improved, the crushing holes on the spiral blades can enable emulsified liquid drops in diesel oil to be crushed by extrusion and then to be rapidly demulsified, water drops which are coalesced into large particles slide along the spiral surfaces of the spiral blades, the emulsifying liquid drops can be further smashed by sharp points in the rotating process, demulsification is promoted, and the demulsified water drops are rapidly dropped under the guidance of inclined sharp points, so that the coalescing efficiency is improved;

5. the outer conductive plates and the inner conductive plates of the fin structures in the coalescence-enhancing areas can enhance the electric field effect, so that water molecules in diesel oil are quickly agglomerated to form large-particle water drops, the outer conductive plates and the inner conductive plates are arranged in a staggered manner and incline downwards, the diversion effect can be achieved, the dropping speed of the water drops to the bottom of the coalescence-enhancing areas is accelerated, and the coalescence-separation efficiency is improved;

6. industrial salt is adopted as a drying agent, so that trace moisture in diesel oil can be quickly absorbed, the moisture content in the diesel oil is reduced, and two water removal layers which are arranged at intervals are clung to the side baffle plates, so that the diesel oil entering the water removal area can be contacted with the water removal layer first, and the water removal effect is improved;

7. the ultrasonic interface meter and the control system are additionally arranged, so that the water level of the drainage cavity is monitored and automatically drained, the labor intensity of workers is reduced, and the working efficiency is improved;

in summary, the diesel dehydration device provided by the invention has a compact structure and small occupied area, adopts the coalescing filter element mechanism to perform primary coalescence, adopts the static generation mechanism to perform secondary coalescence, and then removes water through the water removal layer to finally obtain the high-quality diesel with low water content.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a right side view of the present invention;

FIG. 4 is a cross-sectional view B-B of FIG. 3;

FIG. 5 is a perspective cross-sectional view of the present invention;

FIG. 6 is a schematic view of the structure of a helical blade;

FIG. 7 is a schematic view of the structure of a breaker hole;

FIG. 8 is an exploded view of the electrostatic generating mechanism;

FIG. 9 is a schematic structural view of a partition mechanism;

fig. 10 is a perspective cross-sectional view of the outer conductive sheet;

FIG. 11 is a perspective cross-sectional view of the inner conductive sheet;

FIG. 12 is a schematic view of the structure of an ultrasonic interface meter.

Reference numerals illustrate:

1. a housing, 11, a coalescing cartridge chamber, 111, an oil feed chamber, 112, a coalescing chamber, 113, a permeate chamber, 114, a mounting chamber, 115, a homogenization chamber, 116, a first drainage chamber, 117, a second drainage chamber, 118, an oil outlet chamber, 12, an electrostatic coalescing chamber, 121, a coalescing enhancement zone, 122, a water removal zone, 13, a leg, 2, an oil feed pipe, 21, a first electrically operated valve, 3, a drain pipe, 31, a drain header pipe, 32, a first drain manifold, 321, a second electrically operated valve, 33, a second drain manifold, 331, a third electrically operated valve, 4, an oil outlet pipe, 5, a coalescing cartridge mechanism, 51, a water filter plate, 52, a coalescing cartridge, 53, a coalescing filter plate, 54, a hydrophobic membrane, 55, a servo motor, 56, a helical blade, 561, a blade body, 562, a breaker orifice, 5621, first tapered hole, 5622, cylindrical hole, 5623, second tapered hole, 563, spike, 564, rotation shaft, 6, static electricity generating mechanism, 61, outer electrode plate, 611, outer electrode plate, 612, outer insulating layer, 613, outer conductive sheet, 62, inner electrode plate, 621, inner electrode plate, 622, inner insulating layer, 623, inner conductive sheet, 63, partition mechanism, 631, upper baffle, 6311, oil inlet, 632, lower baffle, 633, side baffle, 6331, flow hole, 634, first annular wall, 635, second annular wall, 7, water removing layer, 8, ultrasonic interface gauge, 81, guide pipe, 811, overflow hole, 812, first limit ring, 813, second limit ring, 82, sealing plug, 83, processing module, 84, float ball, 85, ultrasonic transceiver.

Detailed Description

The following describes specific embodiments of the invention with reference to the drawings and examples:

it should be noted that the structures, proportions, sizes, etc. shown in the drawings are merely for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the invention, which is defined by the appended claims.

Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.

Example 1

Referring to fig. 1 to 12, this embodiment provides a diesel dehydration device, including cylindrical casing 1, be equipped with cylindrical coalescence filter core chamber 11 and annular static coalescence chamber 12 in the casing 1 is coaxial, be equipped with drainage zone 122 in the static coalescence chamber 12, coalescence filter core chamber 11 intercommunication advances oil pipe 2, and inside is equipped with coalescence filter core mechanism 5, and the top intercommunication static coalescence chamber 12, be equipped with static generation mechanism 6 in the static coalescence chamber 12, static generation mechanism 6 includes outer electric plate 61 and interior electric plate 62 that links to each other and the opposite electric property with the power, drainage zone 122 intercommunication goes out oil pipe 4, and inside is equipped with the drainage layer 7, coalescence filter core chamber 11 and the bottom of static coalescence chamber 12 all are equipped with drainage cavity, drainage cavity connects drain pipe 3.

In the above technical scheme, the top of the shell 1 preferably adopts a detachable sealing cover structure, so that the installation and the maintenance are convenient. The outer and inner plates 61, 62 may be of any suitable shape in the prior art, including but not limited to plates, strips, etc., the water removal layer 7, i.e., the water absorption layer containing the water removal agent, may be arranged in any suitable manner, and may be capable of fully absorbing water in the diesel fuel entering the water removal zone 122, and the drainage chamber may be of a conventional drainage tank structure, and may be capable of regularly draining coalesced and settled water into the drainage pipe 3.

The working principle and working process of the embodiment are as follows: the diesel oil is pumped into an oil inlet pipe 2, enters a coalescing filter core cavity 11 in a shell 1 through the oil inlet pipe 2, water in the diesel oil is converged into large-particle liquid drops by a coalescing filter core mechanism 5 in the coalescing filter core cavity 11, the large-particle liquid drops are deposited at the bottom of the coalescing filter core cavity 11, the diesel oil is subjected to primary coalescence, the diesel oil subjected to primary coalescence enters an annular electrostatic coalescing cavity 12 adjacent to the coalescing filter core cavity 11 from the top of the coalescing filter core cavity 11, residual water in the diesel oil is converged into large-particle liquid drops under the action of static charge by an electrostatic generating mechanism 6, the large-particle liquid drops are deposited at the bottom of the electrostatic coalescing cavity 12, the diesel oil is subjected to secondary coalescence, the diesel oil subjected to secondary coalescence enters a water removing area 122 in the electrostatic coalescing cavity 12, enters an oil outlet pipe 4 after passing through a water removing layer 7 in the water removing area 122, and the diesel oil flows out of the shell 1 from the oil outlet pipe 4 to obtain finished diesel oil; when the water accumulated in the drainage chambers at the bottom of the coalescing cartridge chamber 11 and the electrostatic coalescing chamber 12 reaches a certain value, it is drained from the drain pipe 3.

In the diesel dehydration device in this embodiment, the coalescing filter element mechanism 5 and the static electricity generation mechanism 6 are adopted to perform two-stage coalescence on diesel, so that moisture in the diesel can be fully coalesced and settled, the dehydration area 122 is arranged in the static coalescence cavity 12, residual trace moisture can be removed through the water removal layer 7 during static coalescence, the dehydration effect is further improved, diesel with low water content is obtained, and the quality of the diesel is improved; the coalescing filter core cavity 11 and the electrostatic coalescing cavity 12 are adjacent cylindrical and annular, and have compact structure and small occupied area.

Example 2

With reference to fig. 1 to 12, this embodiment provides a diesel dehydration device, on the basis of embodiment 1, the structure of the coalescing filter element mechanism 5 is optimized, so as to further improve the coalescing effect on water, and the specific technical scheme is as follows,

the coalescing filter element mechanism 5 comprises a water filtering plate 51 arranged at the bottom of the coalescing filter element cavity 11 and a cylindrical coalescing filter element 52 arranged on the water filtering plate 51, the coalescing filter element 52 divides the coalescing filter element cavity 11 into an oil inlet cavity 111 and a coalescing cavity 112 from inside to outside, the top of the oil inlet cavity 111 is sealed, the bottom is communicated with the oil inlet pipe 2, an annular coalescing filter plate 53 is arranged above the coalescing filter plate 112, a permeable cavity 113 is arranged above the coalescing filter plate 53, and the outer side wall of the permeable cavity 113 is a hydrophobic membrane 54 through which oil only passes; a cylindrical first drainage cavity 116 is arranged below the water filtering plate 51, and the first drainage cavity 116 is connected with the drain pipe 3.

The working principle and working process of the embodiment are as follows: the diesel oil enters the oil inlet cavity 111 from the oil inlet pipe 2 and permeates into the coalescing cavity 112 through the coalescing filter element 52, the coalescing filter element 52 has the function of coalescing moisture in the diesel oil on one hand, and has the function of stabilizing flow on the other hand, so that the diesel oil flowing in the oil inlet cavity 111 is in a stable state after entering the coalescing cavity 112, a water layer in the diesel oil is sunken, an oil layer is raised, the upper diesel oil layer passes through the coalescing filter plate 53 and then enters the permeation cavity 113, the coalescing filter plate 53 can be made of the same material as the coalescing filter element 52 and is integrally formed with the coalescing filter element, and the diesel oil can pass through and further coalesce moisture in the diesel oil; diesel in the permeate chamber 113 permeates through the hydrophobic membrane 54 into the electrostatic coalescing chamber 12 for electrostatic coalescence.

Example 3

With reference to fig. 1 to 12, this embodiment provides a diesel dehydration device, on the basis of embodiment 2, a spiral blade 56 is disposed in a coalescing filter element mechanism 5, so as to further improve the coalescing effect on water, and the specific technical scheme is as follows,

the top of oil feed chamber 111 is equipped with inclosed installation chamber 114, be equipped with servo motor 55 in the installation chamber 114, be equipped with banded helical blade 56 in the oil feed chamber 111, helical blade 56 connects servo motor 55's output. In the above technical solution, the spiral blade 56 is preferably made of the same material as the coalescing filter element 52, the spiral blade 56 in the form of a twisted strip is twisted along its middle line to form a spiral blade, when the spiral blade 56 rotates, the oil layer can be promoted to rise, the water layer sinks, the oil-water separation efficiency is improved, and the rotation speed of the spiral blade 56 is preferably 60rpm.

In a specific structure, as shown in fig. 6, the helical blade 56 includes a blade body 561, a plurality of crushing holes 562 are formed in the blade body 561, as shown in fig. 7, the crushing holes 562 include a first tapered hole 5621, a cylindrical hole 5622 and a second tapered hole 5623 which are sequentially connected, the first tapered hole 5621 and the second tapered hole 5623 are in tapered communication with the cylindrical hole 5622, a plurality of downwardly inclined spikes 563 are vertically equidistant on two sides of the blade body 561, a rotating shaft 564 is fixedly arranged at the top of the blade body 561, and the rotating shaft 564 is connected with an output end of the servo motor 55. In the above technical scheme, the breaking holes 562 can enable emulsion droplets in diesel oil to be broken by extrusion and then to be broken rapidly, water droplets which are coalesced into large particles slide along the spiral surface of the spiral blade 56, the spike 563 can further break up the emulsion droplets in the rotation process, and the broken water droplets are promoted to fall rapidly under the guidance of the inclined spike 563.

Example 4

With reference to fig. 1 to 12, this embodiment provides a diesel dehydration device, which further optimizes the structure of the static electricity generating mechanism 6 on the basis of embodiment 1, embodiment 2 or embodiment 3, improves the static electricity coalescing efficiency and the coalescing effect, and specifically adopts the following technical scheme,

as shown in fig. 8, the electrostatic generating mechanism 6 includes an outer annular plate 61, an inner plate 62 and a ceramic separating mechanism 63, the outer plate 61 and the inner plate 62 are coaxially spaced apart to form the electrostatic coalescing chamber 12, as shown in fig. 5, the separating mechanism 63, the housing 1 and the hydrophobic membrane 54 jointly enclose to form an annular homogenizing chamber 115, the separating mechanism 63 equally separates the circumference of the electrostatic coalescing chamber 12 into a plurality of coalescing strengthening areas 121 and dewatering areas 122 which are adjacent and communicated with each other, and the upper part of the coalescing strengthening areas 121 is communicated with the homogenizing chamber 115. In the above-described embodiment, the homogenizing chamber 115 can homogenize and disperse the diesel oil permeated from the permeation chamber 113 so as to uniformly flow into each of the coalescence-enhancing regions 121. The ceramic partition 63 can insulate water in diesel fuel, and has a coalescing effect on water in diesel fuel, and can cooperate with electrostatic coalescence to improve coalescence efficiency.

In a specific structure, as shown in fig. 9, the partition mechanism 63 includes an annular upper baffle 631 and a lower baffle 632, and vertical side baffles 633 are disposed between the upper baffle 631 and the lower baffle 632 at equal intervals in circumference; the side baffle 633 is provided with a flow hole 6331, the upper baffle 631 is provided with a plurality of oil inlets 6311 which are communicated with the coalescence strengthening zone 121 and the homogenization cavity 115, the bottom of the lower baffle 632 is coaxially provided with a first annular wall 634 and a second annular wall 635 at intervals, as shown in fig. 5, the first annular wall 634, the lower baffle 632 and the shell 1 jointly enclose an annular oil outlet cavity 118, the first annular wall 634, the second annular wall 635, the lower baffle 632 and the shell 1 jointly enclose an annular second water outlet cavity 117, the oil outlet cavity 118 is communicated with the water removal zone 122 and the oil outlet pipe 4, and the second water outlet cavity 117 is communicated with the coalescence strengthening zone 121 and the water outlet pipe 3.

In a specific structure, as shown in fig. 10, the outer electrode plate 61 includes an outer electrode plate 611, an outer insulating layer 612 is disposed on an outer side wall of the outer electrode plate 611, an outer conductive sheet 613 is disposed on an inner side wall of the outer electrode plate 611, as shown in fig. 11, the inner electrode plate 62 includes an inner electrode plate 621, an inner insulating layer 622 is disposed on an inner side wall of the inner electrode plate 621, an inner conductive sheet 623 is disposed on an outer side wall of the inner electrode plate 621, the outer conductive sheet 613 and the inner conductive sheet 623 are disposed in the coalescence-strengthening region 121, a plurality of the outer conductive sheet 613 and the inner conductive sheet 623 are vertically and equidistantly staggered along the coalescence-strengthening region 121 and are inclined downward, two rows of flow holes 6331 are disposed on the side wall 633, each flow hole 6331 in one row is disposed between two adjacent outer conductive sheets 613, and each flow hole 6331 in the other row is disposed between two adjacent inner conductive sheets 623.

The working principle and working process of the embodiment are as follows: diesel oil enters the corresponding coalescence-enhancing region 121 from the homogenization cavity 115 through a plurality of oil inlets 6311, the electric field effect of the outer electrode plate 611 and the inner electrode plate 621 can be enhanced by the outer conductive sheet 613 and the inner conductive sheet 623 of the fin structure in the coalescence-enhancing region 121, so that water molecules in the diesel oil are quickly agglomerated to form large-particle water drops, the outer conductive sheet 613 and the inner conductive sheet 623 are staggered and incline downwards, a diversion effect can be achieved, the dropping speed of the water drops to the bottom of the coalescence-enhancing region 121 is accelerated, and the coalescence-separation efficiency is improved; the water at the bottom of each coalescence reinforcing area 121 is collected in a second drainage chamber 117 communicated with the coalescence reinforcing area and is discharged through a drain pipe 3 after reaching a certain amount; the diesel oil in the coalescence strengthening zone 121 enters the water removal zone 122 through the flow holes 6331 on the side baffle 633, the water removal layer 7 in the water removal zone 122 can fully absorb residual water in the diesel oil, the diesel oil subjected to water removal flows out from the bottom of the water removal zone 122 into the oil outlet cavity 118 communicated with the water removal zone, and finally flows out from the oil outlet pipe 4.

In this embodiment, by providing the coalescence reinforcing region 121 and the water removal region 122 in the electrostatic coalescence chamber 12, the water in the diesel oil can be efficiently removed, and a high quality product can be obtained.

Example 5

With reference to fig. 1 to 12, this embodiment provides a diesel dehydration device, on the basis of embodiment 5, the structure of the water removal layer 7 is optimized, so as to further improve the water removal effect, and the specific technical scheme is as follows,

the water removal layer 7 is closely attached to the side baffle 633, the water removal layer 7 comprises a hydrophobic insulating wall material through which diesel oil can pass, the hydrophobic insulating wall material is provided with a hollow inner cavity, industrial salt is filled in the hollow inner cavity, two water removal layers 7 arranged at intervals are arranged in each water removal area 122, and the oil outlet cavity 118 is communicated with an area between the two water removal layers 7.

In this embodiment, industrial salt (preferably sodium chloride) is adopted as a drying agent, so that trace moisture in diesel oil can be quickly absorbed, the moisture content in the diesel oil is reduced, and two water removal layers 7 which are arranged at intervals are closely attached to a side baffle 633, so that the diesel oil entering the water removal region 122 can be firstly contacted with the water removal layer 7, and the water removal effect is improved; the diesel fuel after sufficient moisture removal is collected in the area between the two water removal layers 7 and then enters the oil outlet cavity 118 communicating therewith.

Example 6

With reference to fig. 1 to 12, this embodiment provides a diesel dehydration device, on the basis of embodiment 4 or embodiment 5, an ultrasonic interface meter 8 and a control system are added to realize monitoring and automatic drainage of water level in a drainage chamber, reduce labor intensity of workers, improve working efficiency,

the ultrasonic interface meter 8 is respectively arranged in the first water draining cavity 116 and the second water draining cavity 117, the water draining pipe 3 comprises a water draining main pipe 31, a first water draining branch pipe 32 and a second water draining branch pipe 33, a first electric valve 21 is arranged on the oil inlet pipe 2, a second electric valve 321 is arranged on the first water draining branch pipe 32, a third electric valve 331 is arranged on the second water draining branch pipe 33, and the ultrasonic interface meter 8, the first electric valve 21, the second electric valve 321, the third electric valve 331 and the servo motor 55 are all connected with a PLC controller, and a supporting leg 13 is arranged at the bottom of the shell 1.

In a specific structure, as shown in fig. 12, the ultrasonic interface meter 8 includes a conduit 81, a sealing plug 82 and a processing module 83 sequentially connected from top to bottom, a plurality of overflow holes 811 are formed in the side wall of the conduit 81, a first limiting ring 812 is arranged at the top, a second limiting ring 813 is arranged at the lower part of the interior, a floating ball 84 is arranged between the first limiting ring 812 and the second limiting ring 813, the density of the floating ball 84 is between that of water and diesel oil, the outer surface of the floating ball 84 is an ultrasonic reflection surface, an ultrasonic transceiver 85 is arranged below the second limiting ring 813, the transmitting and receiving end of the ultrasonic transceiver 85 faces the floating ball 84, the other end penetrates through the sealing plug 82 to be connected with the processing module 83, and the processing module 83 is connected with a PLC controller.

The working principle and working process of the embodiment are as follows: the processing module 83 of the ultrasonic level gauge 8 is fixed at the bottom of the shell 1, the sealing plug 82 penetrates through the shell 1 in a sealing mode, the guide pipe 81 is inserted into the first drainage cavity 116 or the second drainage cavity 117, the oil-water mixture flows into the guide pipe 81 from the overflow hole 811 of the guide pipe 81, the floating ball 84 floats up and down along with the change of an oil-water interface in the guide pipe 81 area defined by the first limiting ring 812 and the second limiting ring 813, the ultrasonic transceiver 85 sends out signals to the floating ball 84 and receives reflection signals of the floating ball 84, the processing module 83 calculates the floating state of the oil-water interface according to the signals, when the oil-water interface reaches set parameters, the PLC controller controls the second electric valve 321 or the third electric valve 331 to be opened for a certain time, and the second electric valve 321 or the third electric valve 331 is closed again after the water in the first drainage cavity 116 or the second drainage cavity 117 is discharged. In addition, the PLC controller can also automatically control the opening and closing of the first electric valve 21, the opening and closing of the servo motor 55, and the rotation speed adjustment according to the set parameters, thereby improving the working efficiency.

Example 7

The application method of the diesel dehydration device comprises the following steps:

step S100, pumping diesel oil into an oil inlet pipe 2, entering a coalescing filter core cavity 11 in a shell 1 through the oil inlet pipe 2, converging water in the diesel oil into large-particle liquid drops by a coalescing filter core mechanism 5 in the coalescing filter core cavity 11, depositing the large-particle liquid drops at the bottom of the coalescing filter core cavity 11, and performing primary coalescence on the diesel oil;

step S200, enabling the diesel oil subjected to primary coalescence to enter an annular electrostatic coalescence cavity 12 adjacent to the coalescence filter core cavity 11 from the top of the coalescence filter core cavity 11, enabling residual moisture in the diesel oil to be converged into large-particle liquid drops under the action of electrostatic charge by the electrostatic generation mechanism 6, depositing the large-particle liquid drops at the bottom of the electrostatic coalescence cavity 12, and performing secondary coalescence on the diesel oil;

step S300, enabling the diesel oil subjected to secondary coalescence to enter a water removal area 122 in an electrostatic coalescence cavity 12, enter an oil outlet pipe 4 after passing through a water removal layer 7 in the water removal area 122, and flow out of a shell 1 from the oil outlet pipe 4 to obtain finished diesel oil;

step S400, when the accumulated water in the drainage chambers at the bottom of the coalescing filter element chamber 11 and the electrostatic coalescing chamber 12 reaches a certain value, the accumulated water is drained from the drain pipe 3.

The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the scope of the present invention.

Claims (10)

1. The utility model provides a diesel oil dewatering device, includes columniform casing (1), its characterized in that, coaxial cylindrical coalescence filter core chamber (11) and annular static coalescence chamber (12) that are equipped with in casing (1), coalescence filter core chamber (11) intercommunication advance oil pipe (2), inside are equipped with coalescence filter core mechanism (5), top intercommunication static coalescence chamber (12), be equipped with static electricity generation mechanism (6) in static coalescence chamber (12), static electricity generation mechanism (6) include that link to each other and the opposite annular outer electric plate (61) of electrical property and interior electric plate (62) with ceramic separation mechanism (63), outer electric plate (61) and interior electric plate (62) coaxial interval set up, form static coalescence chamber (12), separation mechanism (63) will static coalescence chamber (12) circumference equidistance is separated into a plurality of coalescence reinforcing zone (121) and dewatering zone (122) that are adjacent and communicate each other, dewatering zone (122) intercommunication delivery pipe (4), inside are equipped with dewatering layer (7), coalescence filter core chamber (11) and bottom of electric plate (12) are equipped with drainage cavity (3).

2. A diesel dewatering device according to claim 1, characterized in that the coalescing filter element mechanism (5) comprises a water filtering plate (51) arranged at the bottom of the coalescing filter element cavity (11) and a cylindrical coalescing filter element (52) arranged on the water filtering plate (51), the coalescing filter element (52) divides the coalescing filter element cavity (11) into an oil inlet cavity (111) and a coalescing cavity (112) from inside to outside, the top of the oil inlet cavity (111) is sealed, the bottom is communicated with the oil inlet pipe (2), an annular coalescing filter plate (53) is arranged above the coalescing filter plate (112), a permeable cavity (113) is arranged above the coalescing filter plate (53), and the outer side wall of the permeable cavity (113) is a hydrophobic membrane (54) through which only oil passes; a cylindrical first drainage cavity (116) is arranged below the water filtering plate (51), and the first drainage cavity (116) is connected with the drain pipe (3).

3. The diesel dehydration device according to claim 2, wherein a closed installation cavity (114) is arranged at the top of the oil inlet cavity (111), a servo motor (55) is arranged in the installation cavity (114), a spiral blade (56) in a twisted shape is arranged in the oil inlet cavity (111), and the spiral blade (56) is connected with the output end of the servo motor (55); screw blade (56) are including blade body (561), be equipped with a plurality of broken holes (562) on blade body (561), broken hole (562) are including first bell mouth (5621), cylinder hole (5622) and second bell mouth (5623) that connect gradually, first bell mouth (5621) and second bell mouth (5623) with cylinder hole (5622) convergent intercommunication, vertical equidistance is equipped with a plurality of downward sloping spines (563) on two sides of blade body (561), fixed pivot (564) being equipped with in top of blade body (561), pivot (564) are connected the output of servo motor (55).

4. A diesel dehydration device according to claim 3, characterized in that the separation mechanism (63), the shell (1) and the hydrophobic membrane (54) together enclose an annular homogenization cavity (115), and the upper side of the coalescence strengthening zone (121) is communicated with the homogenization cavity (115).

5. A diesel dehydration device according to claim 4, wherein the separation mechanism (63) comprises an annular upper baffle (631) and a lower baffle (632), and vertical side baffles (633) are arranged between the upper baffle (631) and the lower baffle (632) at equal intervals on the circumference; be equipped with flow hole (6331) on side shield (633), be equipped with the intercommunication on upper shield (631) a plurality of oil inlets (6311) of coalescence reinforcing district (121) and homogenization chamber (115), coaxial interval in lower shield (632) bottom is equipped with first annular wall (634) and second annular wall (635), first annular wall (634), lower shield (632) and casing (1) enclose into annular play oil chamber (118) jointly, first annular wall (634), second annular wall (635), lower shield (632) and casing (1) enclose into annular second drainage chamber (117) jointly, play oil chamber (118) intercommunication dewatering district (122) and oil outlet pipe (4), second drainage chamber (117) intercommunication coalescence reinforcing district (121) and drain pipe (3).

6. The diesel dehydration device according to claim 5, wherein the outer electrode plate (61) comprises an outer electrode plate (611), an outer insulating layer (612) is arranged on an outer side wall of the outer electrode plate (611), an outer conductive sheet (613) is arranged on an inner side wall of the outer electrode plate (611), the inner electrode plate (62) comprises an inner electrode plate (621), an inner insulating layer (622) is arranged on an inner side wall of the inner electrode plate (621), an inner conductive sheet (623) is arranged on an outer side wall of the inner electrode plate (621), the outer conductive sheet (613) and the inner conductive sheet (623) are all arranged in the coalescence strengthening area (121), a plurality of the outer conductive sheet (613) and the inner conductive sheet (623) are vertically staggered along the coalescence strengthening area (121) and are all inclined downwards, two rows of flow holes (6331) are arranged on the side baffle (633), each flow hole (6331) in one row is arranged between two adjacent outer conductive sheets (613), and each flow hole (6331) in the other row is arranged between two adjacent inner conductive sheets (623).

7. A diesel dehydration device according to claim 6, wherein the water removal layer (7) is tightly attached to the side baffle (633), the water removal layer (7) comprises a hydrophobic insulating wall material through which diesel oil can pass, the hydrophobic insulating wall material has a hollow inner cavity filled with industrial salt, two water removal layers (7) arranged at intervals are arranged in each water removal area (122), and an area between the two water removal layers (7) is communicated with the oil outlet cavity (118).

8. The diesel dehydration device according to claim 7, wherein the first drainage cavity (116) and the second drainage cavity (117) are respectively provided with an ultrasonic interface meter (8), the drainage pipe (3) comprises a drainage main pipe (31), a first drainage branch pipe (32) and a second drainage branch pipe (33), the oil inlet pipe (2) is provided with a first electric valve (21), the first drainage branch pipe (32) is provided with a second electric valve (321), the second drainage branch pipe (33) is provided with a third electric valve (331), the ultrasonic interface meter (8), the first electric valve (21), the second electric valve (321), the third electric valve (331) and the servo motor (55) are all connected with a PLC controller, and the bottom of the shell (1) is provided with a supporting leg (13).

9. The diesel oil dehydration device according to claim 8, wherein the ultrasonic interface meter (8) comprises a guide pipe (81), a sealing plug (82) and a processing module (83) which are sequentially connected from top to bottom, a plurality of overflow holes (811) are formed in the side wall of the guide pipe (81), a first limiting ring (812) is arranged at the top, a second limiting ring (813) is arranged at the lower inner part, a floating ball (84) is arranged between the first limiting ring (812) and the second limiting ring (813), the density of the floating ball (84) is between water and diesel oil, the outer surface of the floating ball (84) is an ultrasonic reflection surface, an ultrasonic transceiver (85) is arranged at the lower part of the second limiting ring (813), the transmitting end of the ultrasonic transceiver (85) faces the floating ball (84), the other end penetrates through the sealing plug (82) to be connected with the processing module (83), and the processing module (83) is connected with a PLC.

10. The method of using a diesel dehydration device according to any one of claims 1 to 9 comprising the steps of:

step S100, pumping diesel oil into an oil inlet pipe (2), entering a coalescing filter core cavity (11) in a shell (1) through the oil inlet pipe (2), converging water in the diesel oil into large-particle liquid drops by a coalescing filter core mechanism (5) in the coalescing filter core cavity (11), depositing the large-particle liquid drops at the bottom of the coalescing filter core cavity (11), and performing primary coalescence on the diesel oil;

step S200, enabling diesel oil subjected to primary coalescence to enter an annular electrostatic coalescence cavity (12) adjacent to the coalescence filter core cavity (11) from the top of the coalescence filter core cavity, enabling residual moisture in the diesel oil to be converged into large-particle liquid drops under the action of electrostatic charge by an electrostatic generation mechanism (6), depositing the large-particle liquid drops at the bottom of the electrostatic coalescence cavity (12), and performing secondary coalescence on the diesel oil;

step S300, enabling the diesel oil subjected to secondary coalescence to enter a water removal area (122) in an electrostatic coalescence cavity (12), enter an oil outlet pipe (4) after passing through a water removal layer (7) in the water removal area (122), and flow out of a shell (1) from the oil outlet pipe (4) to obtain finished diesel oil;

and S400, discharging the water accumulated in the drainage chambers at the bottom of the coalescing filter core chamber (11) and the electrostatic coalescing chamber (12) from the drainage pipe (3) after the water reaches a certain value.