Crude oil dehydration system

Abstract

The present invention provides a crude oil dehydration system, including an oil tank body, a dehydration device arranged in the oil tank body, and a recovery device; the oil tank body is provided with an oil inlet pipe connected to the oil tank body, and the oil inlet pipe is used to transport crude oil into the oil tank body; the dehydration device includes an ultrasonic generator arranged in the oil tank body, and the ultrasonic generator is used to emit ultrasonic waves, so that the water content in the crude oil forms mist-like water vapor; the recovery device is connected to the oil tank body to discharge the atomized water vapor in the oil tank body to the outside of the oil tank body. The present invention dissolves the water separation structure of the water in the crude oil to form atomized water vapor by arranging an ultrasonic generator in the oil tank body to form atomized water vapor, and discharges the atomized water vapor to the outside of the oil tank body through the recovery device, thereby replacing the traditional two-stage dehydration method to dehydrate the crude oil, simplifying the crude oil dehydration process, and can quickly reduce the water content in the crude oil to the specified standard, thereby improving the dehydration efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of oil production, and in particular to a crude oil dehydration system. Background Art

[0002] In the process of oil extraction, the crude oil extracted from the oil well generally contains a certain amount of water. Whether in the storage or use of crude oil, the water content of crude oil is strictly controlled. Therefore, the crude oil needs to be dehydrated. Crude oil dehydration refers to the process of using physical or chemical methods to remove water in the crude oil in a free state or emulsion state so that the water content reaches the specified standard.

[0003] In the prior art, the processes for crude oil dehydration generally include heating sedimentation dehydration, chemical dehydration, electrical dehydration, and sonochemical methods. The dehydration method is generally selected based on factors such as the properties of the crude oil, water content, and emulsification degree. Currently, the most common crude oil dehydration process uses a two-stage dehydration method, which first uses heating sedimentation dehydration to reduce the water content in the crude oil to a certain concentration and then uses electrical dehydration for secondary dehydration.

[0004] However, the water content of crude oil treated by the two-stage dehydration method still does not meet the specified standard, and the dehydrated crude oil needs to be naturally settled or returned to the two-stage dehydration method for re-dehydration, resulting in long dehydration time and low dehydration efficiency. Summary of the invention

[0005] The embodiment of the present invention provides a crude oil dehydration system to solve the problems of long dehydration time and low dehydration efficiency in the prior art.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present invention adopts the following technical solution:

[0007] An embodiment of the present invention provides a crude oil dehydration system, comprising an oil tank body, a dehydration device arranged in the oil tank body, and a recovery device.

[0008] The oil tank body is provided with an oil inlet pipe which is in communication with the oil tank body, and the oil inlet pipe is used to transport crude oil into the oil tank body.

[0009] The dehydration device comprises an ultrasonic generator arranged in the oil tank body, and the ultrasonic generator is used to emit ultrasonic waves, so that the water in the crude oil forms mist-like water vapor.

[0010] The recovery device is connected to the oil tank body to discharge the atomized water vapor in the oil tank body to the outside of the oil tank body.

[0011] The crude oil dehydration system as described above, wherein the dehydration device includes a first atomizing element, the first atomizing element is arranged in the oil tank body, and the first atomizing element has a predetermined distance from the bottom wall of the oil tank body, and a circulation channel for the circulation of dehydrated crude oil is provided between the first atomizing element and the side wall of the oil tank body; one end of the oil inlet pipe extending into the oil tank body is located at the top of the first atomizing element away from the bottom wall; the ultrasonic generator is connected to the first atomizing element.

[0012] In the crude oil dehydration system as described above, the first atomizing element is a conical element, with a plane parallel to the bottom wall as the cross section, and the cross section of the conical element gradually increases from the end away from the bottom wall to the end close to the bottom wall.

[0013] The crude oil dehydration system as described above, wherein the first atomizing element includes a first plate body and a second plate body connected to the first plate body, a preset angle is formed between the first plate body and the second plate body, and the distance between the first plate body and the second plate body gradually increases from an end away from the bottom wall to an end close to the bottom wall.

[0014] In the crude oil dehydration system as described above, the preset angle is 120 degrees to 160 degrees.

[0015] In the crude oil dehydration system as described above, the ultrasonic generator comprises a plurality of ultrasonic vibration heads, and the plurality of ultrasonic vibration heads are arranged at intervals on a side of the first atomizing member close to the bottom wall.

[0016] In the crude oil dehydration system as described above, the dehydration device further comprises a second atomizing element, the second atomizing element is arranged on the top of the first atomizing element, and a connecting hole is arranged on the second atomizing element, and the oil inlet pipe is connected to the connecting hole.

[0017] In the crude oil dehydration system as described above, the second atomizing element and the first atomizing element are arranged parallel to each other and spaced apart, and an air extraction cavity is formed between the second atomizing element and the first atomizing element.

[0018] In the crude oil dehydration system as described above, the recovery device includes a pumping device arranged outside the oil tank body, one end of the pumping device is connected to a pipeline, and the end of the pipeline away from the pumping device passes through the side wall of the oil tank body and extends into the pumping cavity.

[0019] The crude oil dehydration system as described above, wherein a viscosity sensor is provided on the oil inlet pipe;

[0020] The crude oil dehydration system further comprises a controller, which is connected to the viscosity sensor and the ultrasonic oscillator respectively and is used to adjust the frequency of the ultrasonic oscillator according to the measurement value of the viscosity sensor.

[0021] Due to the adoption of the above technical solution, the technical progress achieved by the embodiment of the present invention is as follows:

[0022] The embodiment of the present invention provides a crude oil dehydration system, including an oil tank body, a dehydration device arranged in the oil tank body, and a recovery device; the oil tank body is provided with an oil inlet pipe connected to the oil tank body, and the oil inlet pipe is used to transport crude oil into the oil tank body; the dehydration device includes an ultrasonic generator arranged in the oil tank body, and the ultrasonic generator is used to emit ultrasonic waves, so that the water in the crude oil forms mist-like water vapor; the recovery device is connected to the inner cavity of the oil tank body to discharge the atomized water vapor in the oil tank body to the outside of the oil tank body. By arranging an ultrasonic generator in the oil tank body to break up the water separation structure of the water in the crude oil to form atomized water vapor, and discharging the atomized water vapor to the outside of the oil tank body through the recovery device, the traditional two-stage dehydration method is replaced to dehydrate the crude oil, and the crude oil dehydration process is simplified. At the same time, the water content in the crude oil can be quickly reduced to the specified standard, and the dehydration efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] Figure 1 is a structural schematic diagram of a crude oil dehydration system provided by an embodiment of the present invention;

[0025] Figure 2 is a three-dimensional diagram of a dehydration device provided by an embodiment of the present invention;

[0026] Figure 3 is a front view of a dehydration device provided by an embodiment of the present invention;

[0027] Figure 4 is a bottom view of a first atomizing element provided by an embodiment of the present invention;

[0028] Figure 5 is a structural schematic diagram of another crude oil dehydration system provided by an embodiment of the present invention;

[0029] Figure 6 It is a structural schematic diagram of another crude oil dehydration system provided by an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1: Oil tank body;

[0032] 2: Dehydration device;

[0033] 21: Ultrasonic generator;

[0034] 22: first atomizing element;

[0035] 221: first plate;

[0036] 222: second plate;

[0037] 23: second atomizing element;

[0038] 231: communication hole;

[0039] 24: suction chamber;

[0040] 3: Recovery device;

[0041] 31: Exhaust equipment;

[0042] 32: Pipeline;

[0043] 4: Viscosity sensor;

[0044] 5: Controller;

[0045] 6: Cable;

[0046] 7: Circulation channel. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0048] In the absence of conflict, the embodiments of the present invention and the features described in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] Figure 1 is a structural schematic diagram of a crude oil dehydration system provided by an embodiment of the present invention; Figure 2 is a three-dimensional diagram of a dehydration device provided by an embodiment of the present invention; Figure 3 is a front view of a dehydration device provided by an embodiment of the present invention; Figure 4 is a bottom view of a first atomizing element provided by an embodiment of the present invention; Figure 5is a structural schematic diagram of another crude oil dehydration system provided by an embodiment of the present invention; Figure 6 It is a structural schematic diagram of another crude oil dehydration system provided by an embodiment of the present invention.

[0050] Please refer to Figures 1 to 6 As shown, this embodiment provides a crude oil dehydration system, including an oil tank body 1, a dehydration device 2 arranged in the oil tank body, and a recovery device 3; the oil tank body 1 is provided with an oil inlet pipe connected to the oil tank body 1, and the oil inlet pipe 2 is used to transport crude oil into the oil tank body 1; the dehydration device 2 includes an ultrasonic generator 21 arranged in the oil tank body, and the ultrasonic generator 21 is used to emit ultrasonic waves, so that the water in the crude oil forms mist-like water vapor; the recovery device 3 is connected to the oil tank body 1 to discharge the atomized water vapor in the oil tank body to the outside of the oil tank body 1.

[0051] Specifically, the crude oil dehydration system can be used to dehydrate crude oil extracted from oil wells or stored in oil storage equipment to reduce the water content in the crude oil to below 0.5%, meeting the water content requirements of the crude oil for export. The crude oil dehydration system includes an oil tank body 1, a dehydration device 2 arranged in the oil tank body 1, and a recovery device 3.

[0052] The oil tank body 1 can be used as the main equipment for collecting oil on the surface of the oil well. The oil tank body 1 is provided with an oil inlet pipe 11 connected to the oil tank body. The oil inlet pipe 11 serves as a pipeline for conveying crude oil. One end of the oil inlet pipe 11 extends into the interior of the oil storage tank body 1, and the other end of the oil inlet pipe 11 can be connected to an oil production device or an oil storage device. Among them, the shape of the oil tank body 1 can have a variety of options, such as cylindrical or square; in addition, the connection method between the oil inlet pipe 11 and the oil tank body 1 can have a variety of options, for example, the oil tank body 1 is provided with an oil inlet hole, and the oil inlet pipe 11 can be fixed in the oil inlet hole or detachably connected to the oil inlet hole. In the case where the oil inlet pipe is fixed in the oil inlet hole, the side surface of the oil inlet pipe can be welded in the oil inlet hole, and in the case where the oil inlet pipe is detachably connected to the oil inlet hole, a sealing ring can be provided between the side surface of the oil inlet pipe and the inner surface of the oil inlet hole to ensure the airtightness between the oil inlet pipe and the oil tank body, prevent moisture in the air from entering the oil tank body and increasing the water content in the crude oil, and also prevent the natural gas present in the crude oil from diffusing into the air and increasing the content of dangerous gases. Furthermore, the material of the oil inlet pipe 11 can have a variety of options, for example: the oil inlet pipe can be a hose or a hard pipe.

[0053] The dehydration device 2, as a dehydration device of the crude oil dehydration system, can dehydrate the water content of the crude oil. The dehydration device 2 includes an ultrasonic generator 21 arranged in the oil tank body 1. The ultrasonic generator 21 is used to emit ultrasonic waves, so that the water content in the crude oil forms mist-like water vapor, thereby reducing the water content in the crude oil. Among them, there are multiple options for the positional relationship between the ultrasonic generator and the oil tank body, for example: the ultrasonic generator 21 can be arranged on the bottom wall of the oil tank body 1, which can ensure the stability of the ultrasonic generator; for example, the ultrasonic generator 21 can be arranged in the oil tank body 1 through a support, and has a predetermined distance from the bottom wall of the oil tank body, and the crude oil transported to the ultrasonic generator can be ultrasonically treated in batches, which can improve the dehydration efficiency and dehydrate the crude oil to the greatest extent.

[0054] The recovery device 3 can discharge the atomized water vapor in the oil tank body 1 to the outside of the oil tank body 1, and can also discharge part of the natural gas mixed in the crude oil to the outside of the oil tank body. The recovery device is connected to the oil tank body, and a gravitational force is applied to the inside of the oil tank body to discharge the atomized water vapor and natural gas to the outside of the oil tank body, thereby achieving the purpose of dehydrating the crude oil.

[0055] Further, the recovery device 3 includes an air extraction device 31 arranged outside the oil tank body, one end of the air extraction device 31 is connected to a pipeline 32, and the end of the pipeline 32 away from the air extraction device 31 is penetrated through the side wall of the oil tank body 1 and extends into the oil tank body 1, wherein the air extraction device 31 can be an induced draft fan, and secondly, there are multiple options for the connection between the pipeline 32 and the oil tank body 1, for example, the pipeline 32 can be fixedly arranged on the oil tank body 1, or it can be detachably connected to the oil tank body 1, and a sealing ring can be arranged between the side surface of the oil inlet pipe and the oil storage tank body to ensure the airtightness between the inlet pipeline and the oil tank body, prevent moisture in the air from entering the oil tank body and increasing the water content in the crude oil, and also prevent the natural gas present in the crude oil from diffusing into the air and increasing the content of dangerous gases. Furthermore, there are multiple options for the material of the pipeline 32, for example: the pipeline 32 can be a hose or a hard pipe. In addition, the end of the pipeline away from the tank body can be connected to a collection device to collect atomized water vapor and natural gas.

[0056] When the crude oil needs to be dehydrated, the dehydration device is installed in the oil tank body, and the ultrasonic generator is powered on to emit ultrasonic waves, and the crude oil is transported into the oil tank body through the oil inlet pipe. Under the action of ultrasonic waves, the molecular structure between liquid water molecules is broken up to produce atomized water vapor, and the atomized water vapor and natural gas are discharged out of the oil tank body through a recovery device connected to the oil tank body.

[0057] The embodiment of the present invention realizes the dehydration of crude oil by setting up an ultrasonic generator and converting the molecular structure between liquid water molecules into atomized water vapor through high-frequency resonance, and discharges the atomized water vapor to the outside of the oil tank body through a recovery device, thereby realizing rapid and effective dehydration of crude oil, avoiding the use of traditional heating sedimentation dehydration and chemical dehydration for dehydration, improving dehydration efficiency while reducing environmental pollution and dehydration costs.

[0058] Please refer to Figure 2 and Figure 3 The dehydration device 2 includes a first atomizing element 22, which is arranged in the oil tank body, and has a predetermined distance from the bottom wall of the oil tank body 1, and has a circulation channel 7 for the circulation of dehydrated crude oil between the first atomizing element 22 and the side wall of the oil tank body 1; one end of the oil inlet pipe 11 extending into the oil tank body 1 is located at the top of the first atomizing element 22 away from the bottom wall; the ultrasonic generator 21 is connected to the first atomizing element 22.

[0059] Specifically, the first atomizer 22 can be used as a mounting carrier of the ultrasonic generator 21 and also as a reaction surface of the crude oil atomization reaction. The first atomizer 22 is arranged in the oil tank body 1 and has a predetermined distance from the bottom wall of the oil tank body. The predetermined distance can be freely set according to the water content of the crude oil after dehydration. There are multiple options for the connection relationship between the first atomizer and the oil tank body, such as: the first atomizer is welded in the oil tank body, and another example: the first atomizer can be clamped in the oil tank body. In addition, the first atomizer can also be provided with a support member, one end of the support member is fixedly connected to the oil tank body, and the other end is connected to the bottom wall, which can increase the stability of the first atomizer and enhance the carrying capacity of the first atomizer.

[0060] Further, the ultrasonic generator 21 includes a plurality of ultrasonic vibrators, and the plurality of ultrasonic vibrators are arranged at intervals on one side of the first atomizer 22 close to the bottom wall. Among them, the plurality of ultrasonic vibrators can be fixedly connected to the first atomizer or can be detachably connected to the first atomizer. When the plurality of ultrasonic vibrators are fixedly connected to the first atomizer, a variety of fixing methods can be adopted, such as: each ultrasonic vibrator can be fixed to the first atomizer by bolts, and reinforced by glue, which can ensure the connection strength between the ultrasonic vibrator and the first atomizer. Furthermore, an explosion-proof joint is provided at one end of each ultrasonic vibrator away from the first atomizer, which can improve safety performance. In addition, the plurality of ultrasonic vibrators can be arranged along the length direction or width direction of the first atomizer or arranged in a rectangular array on the first atomizer.

[0061] In addition, the oil inlet pipe 11 serves as a carrier for conveying crude oil. One end of the oil inlet pipe 11 extending into the oil tank body 1 is located at the top of the first atomizing element 22 away from the bottom wall, and is used to convey the crude oil to the first atomizing element. The ultrasonic generator 21 located on the first atomizing element 22 emits ultrasonic waves to convert liquid water into atomized water vapor.

[0062] In addition, the circulation channel 7 can provide a circulation path for the dehydrated crude oil, and the circulation channel 7 is constructed by a predetermined distance between the first atomizing element 22 and the side wall of the oil tank body 1, that is, the two ends of the first atomizing element 22 are spaced a predetermined distance from the side wall of the oil tank body 1, so that the dehydrated crude oil can flow into the oil tank body through the circulation channel for storage, wherein the size of the circulation channel 7 can be designed according to the crude oil delivery speed and dehydration efficiency.

[0063] When the crude oil needs to be dehydrated, a first atomizing element equipped with an ultrasonic generator is arranged in the oil tank body and has a predetermined distance from the bottom wall of the oil tank body. Then, the ultrasonic generator is energized to emit ultrasonic waves, and the crude oil is transported into the oil tank body through the oil inlet pipe. The molecular structure between liquid water molecules on the first atomizing element is broken up by the action of ultrasonic waves to generate atomized water vapor, and the atomized water vapor and natural gas are discharged out of the oil tank body through a recovery device connected to the inner cavity of the oil tank body, and the dehydrated crude oil flows into the oil tank body through the circulation channel for storage.

[0064] In this embodiment, the first atomizing element is arranged above the bottom wall of the oil tank body, and a circulation channel for circulating the dehydrated crude oil is provided between the first atomizing element and the side wall of the oil tank body, so that the crude oil delivered to the ultrasonic generator can be ultrasonically treated batch by batch, which can improve the dehydration efficiency and dehydrate the crude oil to the greatest extent.

[0065] Further, as an embodiment of the first atomizing element, the first atomizing element 22 is a conical element, with a plane parallel to the bottom wall as a cross section, and the cross section of the conical element gradually increases from an end away from the bottom wall to an end close to the bottom wall.

[0066] Specifically, the first atomizing element 22 serves as a reaction surface for contact between the crude oil and the ultrasonic generator. It can be a conical element with a plane parallel to the bottom wall as a cross section. The cross section of the conical element gradually increases from the end away from the bottom wall to the end close to the bottom wall, so that the outer surface of the conical element is set at an acute angle to the direction perpendicular to the bottom wall, which facilitates the dehydrated crude oil to flow along the outer surface of the conical element to the circulation channel and finally flow to the oil tank body for storage. The outer surface of the conical element can increase the contact area with the crude oil, so that the crude oil is evenly distributed on the first atomizing element, thereby improving the dehydration efficiency.

[0067] Furthermore, as another embodiment of the first atomizer, the first atomizer 22 includes a first plate body 221 and a second plate body 222 connected to the first plate body, a preset angle is provided between the first plate body 221 and the second plate body 222, and the distance between the first plate body 221 and the second plate body 222 gradually increases from an end away from the bottom wall to an end close to the bottom wall.

[0068] Please refer to Figure 4 Specifically, the first atomizer 22 includes a first plate body 221 and a second plate body 222 connected to the first plate body, wherein the first plate body 221 and the second plate body 222 can be integrally formed or fixed by welding. The first atomizer designed in this embodiment has the advantages of easy processing and installation. In addition, there is a preset angle between the first plate body 221 and the second plate body 222, wherein the size of the preset angle is designed by comprehensively considering the flow rate, viscosity, water content of the crude oil and the frequency of the ultrasonic generator.

[0069] Furthermore, the preset angle is 120 degrees to 160 degrees, so that the crude oil is evenly distributed on the first atomizing element 22, and the dehydrated crude oil can flow smoothly along the inclined first plate 221 and the second plate 222 to the oil tank body 1. Preferably, the preset angle is 150 degrees, which can ensure that the flow rate of the crude oil on the first atomizing element is not too fast or too slow. If the flow rate of the crude oil is too fast, the ultrasonic dehydration effect will be poor, resulting in the dehydration amount of the dehydrated crude oil failing to meet the specified standard. At the same time, although the slow flow rate of the crude oil ensures the dehydration effect of the crude oil, the poor dehydration efficiency causes the production cost to increase.

[0070] Furthermore, in another embodiment, the dehydration device 2 further includes a second atomizing element 23 , which is disposed on the top of the first atomizing element 22 , and a connecting hole 231 is disposed on the second atomizing element 23 , and the oil inlet pipe 11 is connected to the connecting hole 231 .

[0071] Please refer to Figure 6. Specifically, the second atomizer 23, as a part of the dehydration device, is arranged on the top of the first atomizer 22, and can limit the crude oil transported to the first atomizer 22 to prevent the crude oil from rebounding to the side wall of the oil tank body due to the impact during the falling process, so that part of the water in the crude oil cannot be ultrasonically atomized. Among them, the shape of the second atomizer 23 can be consistent with the shape of the first atomizer 22, or it can be a plate-shaped body parallel to the bottom wall of the oil tank body. In addition, the second atomizer 23 can be fixed in the oil tank body or detachably connected to the oil tank body. In addition, a plurality of ultrasonic generators can also be provided on the second atomizer 23, so that the crude oil splashed onto the second atomizer 23 can be ultrasonically atomized and dehydrated, which can not only quickly dehydrate the crude oil, but also improve the dehydration effect, avoid the situation that part of the crude oil splashed onto the second atomizer 23 cannot be dehydrated, and increase the water content of the dehydrated crude oil.

[0072] The second atomizing element 23 is provided with a connecting hole 231 , and the oil inlet pipe 11 is connected to the connecting hole 231 . There are multiple options for connecting the oil inlet pipe 11 and the connecting hole 231 , which can be a fixed connection or a detachable connection.

[0073] Furthermore, the second atomizing element 23 and the first atomizing element 22 are parallel to each other and spaced apart, and a suction cavity 24 is formed between the second atomizing element 23 and the first atomizing element 22. The suction cavity between the first atomizing element 22 and the second atomizing element 23 can facilitate the recovery device to discharge the atomized water vapor and natural gas to the outside of the oil tank body more quickly and effectively. In addition, the end of the pipeline 32 in the recovery device 3 away from the suction device 31 passes through the side wall of the oil tank body and extends into the suction cavity 24, wherein the size of the suction cavity 24 can be freely designed according to the outer diameter of the pipeline.

[0074] Please refer to Figure 5 Furthermore, a viscosity sensor 4 is provided on the oil inlet pipe 11; the crude oil dehydration system also includes a controller 5, which is connected to the viscosity sensor 4 and the ultrasonic vibrator, respectively, and is used to adjust the frequency of the ultrasonic vibrator according to the measurement value of the viscosity sensor.

[0075] Specifically, the viscosity sensor 4 is disposed on the oil inlet pipe 11 and can detect the viscosity of the crude oil in the oil inlet pipe 11 to provide a basis for adjusting the frequency of the ultrasonic vibration head.

[0076] Furthermore, the crude oil dehydration system designed in this embodiment also includes a controller 5, which can be connected to the viscosity sensor 4 and the ultrasonic vibrator through a cable 6 or a communication connection, and is used to receive the detection signal of the viscosity sensor 4 and adjust the frequency of the ultrasonic vibrator in real time according to the detection signal to ensure the efficiency of crude oil dehydration.

[0077] Furthermore, a flow meter and / or a crude oil water content analyzer are also provided on the oil inlet pipe 11, and the flow meter and / or the crude oil water content analyzer are communicatively connected with the controller, and can complement the viscosity sensor 4 to provide a more reliable and powerful theoretical basis for adjusting the frequency of the ultrasonic wave.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0079] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0080] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integrated; it can be mechanical connection, electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be internal communication between two elements or interaction between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0082] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A crude oil dehydration system, characterized in that: It comprises an oil tank body, a dehydration device arranged in the oil tank body, and a recovery device; The oil tank body is provided with an oil inlet pipe which is in communication with the oil tank body, and the oil inlet pipe is used to transport crude oil into the oil tank body; The dehydration device comprises an ultrasonic generator disposed in the oil tank body, and the ultrasonic generator is used to emit ultrasonic waves, so that the water in the crude oil forms mist-like water vapor; The recovery device is connected to the oil tank body to discharge the atomized water vapor in the oil tank body to the outside of the oil tank body; The dehydration device comprises a first atomizing element, which is arranged in the oil tank body, and the first atomizing element is at a predetermined distance from the bottom wall of the oil tank body, and a circulation channel for the dehydrated crude oil to circulate is provided between the first atomizing element and the side wall of the oil tank body; one end of the oil inlet pipe extending into the oil tank body is located at the top of the first atomizing element away from the bottom wall; the ultrasonic generator is connected to the first atomizing element; The first atomizing element is a conical element, with a plane parallel to the bottom wall as a cross section, and the cross section of the conical element gradually increases from an end away from the bottom wall to an end close to the bottom wall; The first atomizer includes a first plate and a second plate connected to the first plate. A preset angle is formed between the first plate and the second plate, and a distance between the first plate and the second plate increases gradually from an end away from the bottom wall to an end close to the bottom wall.

2. The crude oil dehydration system according to claim 1, characterized in that: The preset angle is 120 degrees to 160 degrees.

3. The crude oil dehydration system according to claim 1 or 2, characterized in that: The ultrasonic generator comprises a plurality of ultrasonic vibration heads, and the plurality of ultrasonic vibration heads are arranged at intervals on a side of the first atomizing member close to the bottom wall.

4. The crude oil dehydration system according to claim 3, characterized in that: The dehydration device further comprises a second atomizing element, which is arranged on the top of the first atomizing element and is provided with a connecting hole, and the oil inlet pipe is connected to the connecting hole.

5. The crude oil dehydration system according to claim 4, characterized in that: The second atomizing element and the first atomizing element are parallel to each other and spaced apart, and an air pumping cavity is formed between the second atomizing element and the first atomizing element.

6. The crude oil dehydration system according to claim 5, characterized in that: The recovery device comprises an air extraction device arranged outside the oil tank body, one end of the air extraction device is connected to a pipeline, and the end of the pipeline away from the air extraction device passes through the side wall of the oil tank body and extends into the air extraction cavity.

7. The crude oil dehydration system according to claim 6, characterized in that: The oil inlet pipe is provided with a viscosity sensor; The crude oil dehydration system further comprises a controller, which is connected to the viscosity sensor and the ultrasonic oscillator respectively and is used to adjust the frequency of the ultrasonic oscillator according to the measurement value of the viscosity sensor.

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