CN113967368B

CN113967368B - Oil product dewatering device

Info

Publication number: CN113967368B
Application number: CN202111584194.0A
Authority: CN
Inventors: 艾明刚; 蔡宝利; 赵华; 张军; 于华; 葛晓凯
Original assignee: Shandong Haisheng Ocean Engineering Group Co ltd; Shengli Oilfield Huahai Petrochemical Co ltd
Current assignee: Shandong Haisheng Ocean Engineering Group Co ltd; Shengli Oilfield Huahai Petrochemical Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-03-22
Anticipated expiration: 2041-12-23
Also published as: CN113967368A

Abstract

The invention provides an oil product dehydration device, and belongs to the technical field of oil-water separation. The technical scheme is as follows: the support is provided with a tank body with a sealing cover, the tank body is concentrically provided with a precipitation barrel with an open upper end, an oil storage barrel is concentrically arranged below the tank body, the outer wall of the open end of the precipitation barrel is concentrically provided with a hollow convex circle, the bottom of the convex circle is communicated with the bottom of the oil storage barrel through a plurality of oil inlet pipes, the oil inlet pipes are positioned on the outer side of the precipitation barrel, the lower end of the precipitation barrel is provided with a U-shaped drain pipe, the bottom end of the U-shaped drain pipe is communicated with the bottom of the precipitation barrel, the high-end opening of the U-shaped drain pipe faces upwards and is positioned on the upper portion of the precipitation barrel, and the bottom end of the U-shaped drain pipe is provided with a one-way valve which can be communicated from the precipitation barrel to the tank body; the upper end of the convex circle is provided with a feeding pipe, and the lower end of the feeding pipe extends into the bottom of the sedimentation barrel; the upper part of the tank body is provided with a tank body oil discharge pipe, and the upper end of the tank body is provided with an exhaust valve. The invention has the beneficial effects that: the oil can be dehydrated.

Description

Oil product dewatering device

Technical Field

The invention relates to the technical field of oil-water separation, in particular to an oil product dehydration device.

Background

Oil dehydration refers to a process of removing water contained in oil in a free state or an emulsion state by a physical or chemical method to make the water content meet a predetermined standard, and there are methods such as sedimentation dehydration, thermochemical sedimentation dehydration, and electrochemical combined dehydration. In the process of settling and dewatering, a demulsifier is generally required to be added, and the chemical action of the demulsifier is utilized to separate oil and water in the emulsified oil-water mixed liquid, so that the aim of dewatering crude oil is fulfilled. The application lies in providing a novel oil dewatering device of structure.

Disclosure of Invention

The invention aims to provide an oil product dehydration device capable of dehydrating oil products.

The invention is realized by the following measures: an oil product dehydration device is characterized by comprising a support, wherein a tank body with a sealing cover is arranged on the support, a precipitation barrel with an open upper end is concentrically arranged in the tank body, an oil storage barrel is concentrically arranged below the tank body, a hollow convex circle is concentrically arranged on the outer wall of the opening end of the precipitation barrel, the bottom of the convex circle is communicated with the bottom of the oil storage barrel through a plurality of oil inlet pipes, the oil inlet pipes are positioned on the outer side of the precipitation barrel, a U-shaped drain pipe is arranged at the lower end of the precipitation barrel, the bottom end of the U-shaped drain pipe is communicated with the bottom of the precipitation barrel, the high-end opening of the U-shaped drain pipe faces upwards and is positioned at the upper part of the precipitation barrel, and a one-way valve capable of communicating from the precipitation barrel to the tank body is arranged at the bottom end of the U-shaped drain pipe;

the upper end of the convex circle is provided with a feeding pipe, the lower end of the feeding pipe extends into the bottom of the sedimentation barrel, and the upper end of the feeding pipe extends out of the sealing cover and is connected with a feeding device;

the upper portion of the jar body is provided with jar body oil extraction pipe, the upper portion of the jar body just is located the top of jar body oil extraction pipe is provided with the pipe that adds of demulsifier, the upper portion of oil storage bucket is provided with oil storage bucket oil extraction pipe, the upper end of the jar body is provided with discharge valve.

The feeding device is generally connected with the oil product storage device by an oil pump, and is not described in detail herein for the prior art.

The separation of profit is carried out with the mode of deposiing to the oil in the sedimentation bucket, can reduce the use of demulsifier like this, the raw materials process the entering that the inlet pipe does not stop according to certain velocity of flow the sedimentation bucket deposits under the effect of gravity, and the oil level up gradually until getting into the bulge, gets into oil process in the bulge the oil inlet pipe gets into the bottom of oil storage bucket once more through deposiing in the oil storage bucket, be located the oil process on oil storage bucket upper portion oil storage bucket row oil pipe discharges. At the moment, the sedimentation barrel reaches the opening pressure of the one-way valve, the one-way valve is opened, and water below the sedimentation barrel continuously enters the tank body through the U-shaped drain pipe to realize temporary storage. In order to control the flow rate of the raw material, a flow sensor can be arranged on the feeding pipe, and the flow sensor is not described in detail in the prior art.

When the liquid level in the sedimentation barrel is higher than the lower end surface of the convex circle, the check valve is opened; and when the liquid level in the sedimentation barrel is slightly lower than the lower end surface of the convex circle, the one-way valve is closed.

In order to ensure that the liquid entering the interior of the convex circle is oil, the feed pipe extends into the bottom of the settling barrel.

In addition, because the inlet pipe and the U-shaped drain pipe are both located in the lower part of the settling barrel, the newly entered raw materials can directly enter the tank body through the U-shaped drain pipe, in order to avoid the situation, an annular baffle plate is concentrically arranged on the inner bottom surface of the settling barrel, and the inlet pipe is located on the outer side of the annular baffle plate. The U-shaped drain pipe and the feeding pipe are separated by the annular baffle plate, and the height of the annular baffle plate can be determined according to actual conditions.

Further, an annular boss is concentrically arranged on the outer wall of the convex circle, annular grooves are formed in the upper end face and the lower end face of the annular boss, an outer gear ring is rotatably arranged in the annular grooves, annular end plates are concentrically arranged on the upper end face and the lower end face of the outer gear ring, and annular inserting plates matched with the annular grooves are arranged on the annular end plates;

the sealed cover is rotated and is provided with a gear shaft, the lower extreme of gear shaft stretches into the jar body and stretch into the end be provided with outer ring gear meshed's driving gear, the upper end of gear shaft stretches out sealed cover and stretch out the end and be connected with the motor that has the reduction gear, the below of lower annular end plate is provided with the puddler, be provided with a plurality of stirring board along vertical direction on the puddler.

Because the internal raw materials content of jar is too big, consequently can pass through add the material pipe toward jar internal demulsifier that adds, can make things convenient for like this jar internal raw materials is oil-water separation with higher speed under the effect of demulsifier, it is right to stir the board the internal raw materials realization of jar is stirred, stir the board along outer ring gear is circular motion, can fully right the internal liquid of jar is stirred.

Further, the circumference equipartition has a plurality of otic placode on the lateral wall of lower annular end plate, the below of otic placode is all rotated and is provided with the (mixing) shaft, there is a plurality of agitator along the axis direction equipartition on the (mixing) shaft, just be located on the (mixing) shaft the below of otic placode is provided with driven gear, the inner wall upper portion of the jar body be provided with driven gear meshing's ring gear, the ring gear is fixed on the jar body. The stirrer can do circular motion along the outer gear ring, and can rotate in the process that the driven gear is meshed with the inner gear ring, so that the stirring effect is further enhanced.

Further, the stirrer and the stirring plate which are positioned at the uppermost part are both lower than the high end of the U-shaped drain pipe.

Further, the lower extreme of oil storage bucket pass through the connecting pipe with the upper portion intercommunication of the jar body, be provided with the valve on the connecting pipe.

Furthermore, be provided with a plurality of through-hole on the oil storage bucket, advance oil pipe peg graft in the through-hole, it is provided with the spacing ring just to be located on the outer wall on the oil pipe to advance oil the top of oil storage bucket. And a sealing ring is arranged between the limiting ring and the inner bottom wall of the tank body.

Further, the sealing cover is arranged on the tank body in a threaded connection mode, and a pressing table is concentrically arranged at the center of the sealing cover;

further, when the sealing cover is sealed with the tank body, the lower end face of the pressing platform is pressed on the upper end face of the convex circle, and the limiting ring is pressed on the bottom wall of the inner wall of the tank body. The fixing of the sedimentation barrel is realized through the matching of the sealing cover and the pressing platform.

Furthermore, the stirring plate is an inclined plate with a high upper end and a low lower end, so that the raw materials in the tank body can be conveniently stirred.

Further, the tank body oil drain pipe and the high end of the U-shaped drain pipe are located on different sides of the settling barrel.

Further, all be provided with control flap on jar body oil extraction pipe, oil storage bucket oil extraction pipe and the material that adds.

Furthermore, the cross sections of the tank body, the oil storage barrel and the sedimentation barrel are all circular rings.

The working principle is as follows: the raw materials process the entering that the inlet pipe does not stop according to certain velocity of flow sediment the bucket, deposits under the effect of gravity, and the oil level up goes up gradually until getting into the bulge, gets into oil process in the bulge the oil inlet pipe gets into the bottom of oil storage bucket once more through deposiing in the oil storage bucket, be located the oil process on oil storage bucket upper portion the oil storage bucket arranges the oil pipe and discharges. At the moment, the sedimentation barrel reaches the opening pressure of the one-way valve, the one-way valve is opened, and water below the sedimentation barrel continuously enters the tank body through the U-shaped drain pipe to realize temporary storage. And when the liquid level in the sedimentation barrel is slightly lower than the lower end surface of the convex circle, the one-way valve is closed.

Get into when the internal raw materials of jar gradually increase, can pass through add the material pipe toward jar internal demulsifier that adds starts the motor drives stirring board and agitator stir, realize repeated demulsification, then static sediment, the pass through jar body oil drain pipe discharges.

Compared with the prior art, the invention has the beneficial effects that: the oil product can be dehydrated; through two times of gravity precipitation, a part of oil is separated out firstly, and then the separated raw materials flow back to the tank body for demulsification treatment, so that the use of a demulsifier is reduced; in the whole process, the raw materials can continuously enter to realize uninterrupted oil product dehydration.

Drawings

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the structure with the sealing cap removed;

FIG. 3 is a schematic view of the cut-away internal structure of the can body;

FIG. 4 is a schematic view of the stirring plate and the stirrer;

FIG. 5 is a schematic structural view of an outer ring gear;

FIG. 6 is a schematic view of the internal structure of the tank, the settling barrel and the oil storage barrel;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is a schematic view of a partial structure of a can body;

wherein the reference numerals are: 1. a tank body; 2. a sealing cover; 3. a support; 4. an oil storage barrel; 5. a settling barrel; 6. an outer ring gear; 7. convex round; 101. a feeding pipe; 102. an exhaust valve; 103. an inner gear ring; 104. a tank body oil discharge pipe; 201. pressing the table; 401. an oil discharge pipe of the oil storage barrel; 402. a connecting pipe; 501. a feed pipe; 502. a U-shaped drain pipe; 503. an annular baffle; 601. an upper annular end plate; 602. a driving gear; 603. a gear shaft; 604. a motor; 605. an ear plate; 606. a driven gear; 607. a stirring shaft; 608. a lower annular end plate; 609. a stirring rod; 610. stirring the plate; 611. a stirrer; 701. an oil inlet pipe; 702. a limiting ring; 703. an annular boss; 704. an annular groove.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

The first embodiment is as follows:

referring to fig. 1-8, an oil product dehydration device comprises a support 3, wherein a tank body 1 with a sealing cover 2 is arranged on the support 3, a precipitation barrel 5 with an open upper end is concentrically arranged in the tank body 1, an oil storage barrel 4 is concentrically arranged below the tank body 1, a hollow convex circle 7 is concentrically arranged on the outer wall of the opening end of the precipitation barrel 5, the bottom of the convex circle 7 is communicated with the bottom of the oil storage barrel 4 through a plurality of oil inlet pipes 701, the oil inlet pipes 701 are positioned at the outer side of the precipitation barrel 5, the lower end of the precipitation barrel 5 is provided with a U-shaped drain pipe 502, the bottom end of the U-shaped drain pipe 502 is communicated with the bottom of the precipitation barrel 5, the high-end opening of the U-shaped drain pipe 502 is upward and positioned at the upper part of the precipitation barrel 5, and the bottom end of the U-shaped drain pipe 502 is provided with a one-way valve which can be communicated from the precipitation barrel 5 to the tank body 1;

the upper end of the convex circle 7 is provided with a feeding pipe 501, the lower end of the feeding pipe 501 extends into the bottom of the sedimentation barrel 5, and the upper end of the feeding pipe 501 extends out of the sealing cover 2 and is connected with a feeding device;

the upper portion of the tank body 1 is provided with a tank body oil discharge pipe 104, the upper portion of the tank body 1 and the upper portion of the tank body oil discharge pipe 104 are provided with a material adding pipe 101 of a demulsifier, the upper portion of the oil storage barrel 4 is provided with an oil storage barrel oil discharge pipe 401, and the upper end of the tank body 1 is provided with an exhaust valve 102.

The separation of profit is carried out with the mode of sediment to the oil in the sedimentation bucket 5, can reduce the use of demulsifier like this, the raw materials deposit bucket 5 according to the entering that certain velocity of flow does not stop through inlet pipe 501, deposit under the effect of gravity, the oil level up gradually until getting into bulge 7, the oil that gets into in the bulge 7 gets into the bottom that oil storage bucket 4 through advancing oil pipe 701, again through deposiing in oil storage bucket 4, the oil that is located oil storage bucket 4 upper portion discharges through oil storage bucket oil extraction pipe 401. At this time, the settling barrel 5 reaches the opening pressure of the one-way valve, the one-way valve is opened, and water below the settling barrel 5 continuously enters the tank body 1 through the U-shaped drain pipe 502 to be temporarily stored. In order to control the flow rate of the raw material, a flow sensor may be disposed on the feeding pipe 501, and the flow sensor is not described in detail herein for the prior art.

When the liquid level in the sedimentation barrel 5 is higher than the lower end surface of the convex circle 7, the check valve is opened; when the liquid level in the sedimentation barrel 5 is slightly lower than the lower end surface of the convex circle 7, the one-way valve is closed.

To ensure that the liquid entering the interior of the bead 7 is oil, the feed pipe 501 extends into the bottom of the settling tank 5.

In addition, since the feed pipe 501 and the U-shaped drain pipe 502 are located at the lower portion of the settling tank 5, the newly introduced raw material may directly enter the tank 1 through the U-shaped drain pipe 502. Therefore, an annular baffle 503 is concentrically provided on the inner bottom surface of the settling tub 5, and the feed pipe 501 is located outside the annular baffle 503. The U-shaped drain pipe 502 and the feed pipe 501 are separated by the annular baffle 503, and the height of the annular baffle 503 can be determined according to actual conditions.

Further, an annular boss 703 is concentrically arranged on the outer wall of the convex circle 7, annular grooves 704 are respectively arranged on the upper end surface and the lower end surface of the annular boss 703, an outer gear ring 6 is rotatably arranged in the annular groove 704, annular end plates are concentrically arranged on the upper end surface and the lower end surface of the outer gear ring 6, each annular end plate comprises an upper annular end plate 601 and a lower annular end plate 608, and annular inserting plates matched with the annular grooves 704 are arranged on the two annular end plates;

a gear shaft 603 is rotatably arranged on the sealing cover 2, the lower end of the gear shaft 603 extends into the tank body 1 and the extending end is provided with a driving gear 602 meshed with the outer gear ring 6, the extending end of the upper end of the gear shaft 603 extending out of the sealing cover 2 is connected with a motor 604 with a speed reducer, a stirring rod 609 is arranged below the lower annular end plate 608, and a plurality of stirring plates 610 are arranged on the stirring rod 609 in the vertical direction.

Because the raw material content in the tank body 1 is too large, a demulsifier can be added into the tank body 1 through the feeding pipe 101, so that the raw material in the tank body 1 can be conveniently subjected to accelerated oil-water separation under the action of the demulsifier, the stirring plate 610 realizes stirring of the raw material in the tank body 1, and the stirring plate 610 does circular motion along the outer gear ring 6, so that the liquid in the tank body 1 can be fully stirred.

Further, a plurality of ear plates 605 are circumferentially and uniformly distributed on the side wall of the lower annular end plate 608, a stirring shaft 607 is rotatably arranged below the ear plates 605, a plurality of stirrers 611 are uniformly distributed on the stirring shaft 607 along the axial direction, a driven gear 606 is arranged on the stirring shaft 607 and below the ear plates 605, an inner gear ring 103 meshed with the driven gear 606 is arranged on the upper portion of the inner wall of the tank body 1, and the inner gear ring 103 is fixed on the tank body 1. The stirrer 611 can not only do circular motion along the external gear ring 6, but also realize the rotation of the stirrer 611 in the process that the driven gear 606 is meshed with the internal gear ring 103, so that the stirring effect is further enhanced.

Further, the stirrer 611 and the stirring plate 610 located at the uppermost position are both located below the high end of the U-shaped drain pipe 502.

Further, the lower end of the oil storage barrel 4 is communicated with the upper part of the tank body 1 through a connecting pipe 402, and a valve is arranged on the connecting pipe 402.

Further, be provided with a plurality of through-hole on the oil storage bucket 4, advance oil pipe 701 and peg graft in the through-hole, advance on the outer wall on the oil pipe 701 and be located the top of oil storage bucket 4 and be provided with spacing ring 702. A sealing ring is arranged between the limiting ring 702 and the inner bottom wall of the tank body 1.

Further, the sealing cover 2 is arranged on the tank body 1 through threaded connection, and a pressing platform 201 is concentrically arranged at the center of the sealing cover 2;

further, when the sealing cover 2 is sealed with the can body 1, the lower end surface of the pressing table 201 is pressed on the upper end surface of the convex circle 7 and the limit ring 702 is pressed on the bottom wall of the inner wall of the can body 1. The fixing of the sedimentation barrel 5 is realized through the cooperation of the sealing cover 2 and the pressing platform 201.

Further, stir board 610 and be the inclined plate that the upper end is high lower extreme is low, conveniently stir the raw materials realization in the jar body 1.

Further, the high ends of the tank drain pipe 104 and the U-shaped drain pipe 502 are located on different sides of the settling tank 5.

Further, control valves are arranged on the tank body oil discharge pipe 104, the oil storage barrel oil discharge pipe 401 and the feeding pipe 101.

The use method comprises the following steps: the raw materials through inlet pipe 501 according to the entering that certain velocity of flow does not stop and deposit bucket 5, deposit under the effect of gravity, the oil level up gradually until getting into bulge circle 7, the oil that gets into in the bulge circle 7 gets into the bottom of oil storage bucket 4 through advancing oil pipe 701, once more through deposiing in oil storage bucket 4, the oil that is located oil storage bucket 4 upper portion discharges through oil storage bucket oil extraction pipe 401. At this time, the settling barrel 5 reaches the opening pressure of the one-way valve, the one-way valve is opened, and water below the settling barrel 5 continuously enters the tank body 1 through the U-shaped drain pipe 502 to be temporarily stored. When the liquid level in the sedimentation barrel 5 is slightly lower than the lower end surface of the convex circle 7, the one-way valve is closed.

When the raw materials entering the tank body 1 gradually increase, the demulsifier can be added into the tank body 1 through the feeding pipe 101, the motor 604 is started to drive the stirring plate 610 and the stirrer 611 to stir, so that repeated demulsification is realized, and then the raw materials are statically precipitated and discharged through the tank body oil discharge pipe 104.

Example two:

In addition, since the feed pipe 501 and the U-shaped drain pipe 502 are located at the lower portion of the settling tank 5, the newly introduced raw material may directly enter the tank 1 through the U-shaped drain pipe 502. Therefore, an annular baffle 503 is concentrically provided on the inner bottom surface of the settling tank 5, and the feed pipe 501 is located outside the annular baffle 503. The U-shaped drain pipe 502 and the feed pipe 501 are separated by the annular baffle 503, and the height of the annular baffle 503 can be determined according to actual conditions.

Further, an annular boss 703 is concentrically arranged on the outer wall of the convex circle 7, annular grooves 704 are respectively arranged on the upper end surface and the lower end surface of the annular boss 703, an outer gear ring 6 is rotatably arranged in the annular groove 704, annular end plates are concentrically arranged on the upper end surface and the lower end surface of the outer gear ring 6, the annular end plates comprise an upper annular end plate 601 and a lower annular end plate 608, and annular inserting plates matched with the annular grooves 704 are arranged on the two annular end plates;

a gear shaft 603 is rotatably arranged on the sealing cover 2, a driving gear 602 meshed with the outer gear ring 6 is arranged at the lower end of the gear shaft 603, which extends into the tank body 1, a driving end of the driving gear is connected with the outer gear ring 6, the upper end of the gear shaft 603 extends out of the sealing cover 2, and the extending end of the gear shaft is connected with a motor 604 with a speed reducer, a stirring rod 609 is arranged below the lower annular end plate 608, and a plurality of stirring plates 610 are arranged on the stirring rod 609 in the vertical direction.

Further, the agitating plates 610 positioned at the uppermost position are all positioned lower than the high end of the U-shaped drain pipe 502.

further, when the sealing cover 2 is sealed with the can body 1, the lower end surface of the pressing table 201 is pressed against the upper end surface of the convex circle 7 and the limit ring 702 is pressed against the inner bottom wall of the can body 1. The fixing of the sedimentation barrel 5 is realized through the cooperation of the sealing cover 2 and the pressing platform 201.

Further, the tank body oil discharge pipe 104, the oil storage barrel oil discharge pipe 401 and the feeding pipe 101 are all provided with control valves.

When the raw materials entering the tank body 1 are gradually increased, the demulsifier can be added into the tank body 1 through the feeding pipe 101, the motor 604 is started to drive the stirring plate 610 to stir, so that repeated demulsification is realized, then the mixture is statically precipitated and discharged through the tank body oil discharge pipe 104

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, e.g. as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An oil product dehydration device is characterized by comprising a support, wherein a tank body with a sealing cover is arranged on the support, a precipitation barrel with an open upper end is concentrically arranged in the tank body, an oil storage barrel is concentrically arranged below the tank body, a hollow convex circle is concentrically arranged on the outer wall of the opening end of the precipitation barrel, the bottom of the convex circle is communicated with the bottom of the oil storage barrel through a plurality of oil inlet pipes, the oil inlet pipes are positioned on the outer side of the precipitation barrel, a U-shaped drain pipe is arranged at the lower end of the precipitation barrel, the bottom end of the U-shaped drain pipe is communicated with the bottom of the precipitation barrel, the high-end opening of the U-shaped drain pipe faces upwards and is positioned at the upper part of the precipitation barrel, and a one-way valve capable of communicating from the precipitation barrel to the tank body is arranged at the bottom end of the U-shaped drain pipe;

the oil storage tank is characterized in that a tank body oil discharge pipe is arranged at the upper part of the tank body, a feeding pipe of a demulsifier is arranged at the upper part of the tank body and above the tank body oil discharge pipe, an oil storage tank oil discharge pipe is arranged at the upper part of the oil storage tank, and an exhaust valve is arranged at the upper end of the tank body;

the outer wall of the convex circle is concentrically provided with an annular boss, the upper end surface and the lower end surface of the annular boss are both provided with annular grooves, an outer gear ring is arranged in the annular grooves in a rotating mode, the upper end surface and the lower end surface of the outer gear ring are both concentrically provided with annular end plates, and the annular end plates are provided with annular inserting plates matched with the annular grooves;

2. The oil product dewatering device of claim 1, wherein an annular baffle is concentrically disposed on the inner bottom surface of the settling barrel, and the feed pipe is located outside the annular baffle.

3. The oil product dewatering device of claim 2, wherein a plurality of lugs are circumferentially and evenly distributed on the side wall of the lower annular end plate, a stirring shaft is rotatably arranged below the lugs, a plurality of stirrers are evenly distributed on the stirring shaft along the axis direction, a driven gear is arranged on the stirring shaft and below the lugs, an inner gear ring meshed with the driven gear is arranged on the upper portion of the inner wall of the tank body, and the inner gear ring is fixed on the tank body.

4. An oil dewatering apparatus as defined in claim 3, wherein the uppermost agitator and agitator plate are both below the high end of the U-shaped drain pipe.

5. The oil product dewatering device of claim 1, wherein the lower end of the oil storage barrel is communicated with the upper part of the tank body through a connecting pipe, and a valve is arranged on the connecting pipe.

6. The oil product dehydration device of claim 3, characterized in that the oil storage barrel is provided with a plurality of through holes, the oil inlet pipe is inserted into the through holes, and a limit ring is arranged on the outer wall of the oil inlet pipe and above the oil storage barrel.

7. The oil product dehydration device of claim 6, characterized in that the sealing cover is disposed on the tank body by screw connection, and a pressing platform is concentrically disposed at the center of the sealing cover;

when the sealing cover is sealed with the tank body, the lower end face of the pressing platform is pressed on the upper end face of the convex circle, and the limiting ring is pressed on the inner bottom wall of the tank body.

8. An oil product dewatering device according to claim 3, wherein the agitator plates are inclined plates with upper ends higher and lower ends lower.