Ultrasonic crude oil water distribution system

Abstract

The utility model discloses an ultrasonic crude oil water distribution system, and relates to the technical field of oil field equipment. The ultrasonic crude oil water separation system comprises a pipeline mixer, an electric heater, a dosing device and a horizontal ultrasonic coalescence separator. The pipeline mixer is provided with a crude oil inlet, a dosing inlet and a mixing outlet. The electric heater is used for heating crude oil and is communicated to the crude oil inlet. The chemical adding device is used for adding chemicals into the crude oil, the chemical adding device is communicated to the chemical adding inlet, and the crude oil and the chemicals are mixed in the pipeline mixer. The horizontal ultrasonic coalescence separator comprises an ultrasonic vibrator, the horizontal ultrasonic coalescence separator is provided with a separation inlet, an oil phase discharge port and a water phase discharge port, the mixing outlet is communicated to the separation inlet, and after crude oil is treated by the horizontal ultrasonic coalescence separator, an oil phase is discharged through the oil phase discharge port, and a water phase is discharged through the water phase discharge port.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field equipment, in particular to an ultrasonic crude oil water separation system. Background Art

[0002] The water associated with crude oil in oil fields is a metamorphic hydrothermal fluid formed in the process of geological evolution. Under the high temperature and high pressure environment underground, it is saturated water of various metal salts and complexes. During the exploitation of crude oil, the water associated with crude oil enters the ground environment with the crude oil. As the pressure and temperature decrease, the minerals in the water associated with crude oil are saturated and precipitated, and scaling occurs. The bacteria and other microorganisms contained in the water rapidly multiply when exposed to oxygen, which will accelerate the corrosion of steel in the crude oil water distribution system.

[0003] In addition, oil recovery additives are usually added in the middle and late stages of oil wells to wash the formation rocks white, which will lead to complex quality of the produced crude oil, obvious foam emulsification, and difficulty in oil-water separation. The use of steam thermal recovery will increase the water content of crude oil and change the salt content of the water phase; the use of carbon dioxide flooding will cause the crude oil to contain more gas, the gas phase will be complex, and the dissolved gas and foam in the crude oil will change.

[0004] In order to solve the above defects, there is also a method of using fire tube heating to induce thermal stratification of crude oil. However, this method may cause local precipitation of salt in the crude oil, hardening and hardening, resulting in reduced heat transfer efficiency, softening of steel or local corrosion. In order to eliminate the foam in the crude oil, there is also a method of adding demulsifiers to the crude oil to open the foam and change the surface active water. This method will increase the cost and make the composition of the crude oil more complicated, which will affect the subsequent refining.

[0005] In view of the above problems, it is urgent to design a crude oil water separation system that relies on physical technology, reduces chemical losses, and is long-term stable. Utility Model Content

[0006] In view of this, the embodiment of the present application provides an ultrasonic crude oil water separation system, which relies on physical technology to separate crude oil and water, can avoid or reduce the use of chemicals, and is safe and stable.

[0007] The technical solution of the embodiment of the present application is implemented as follows:

[0008] The embodiment of the present application provides an ultrasonic crude oil water separation system. The ultrasonic crude oil water separation system includes a pipeline mixer, an electric heater, a dosing device and a horizontal ultrasonic coalescing separator. Among them, the pipeline mixer is provided with a crude oil inlet, a dosing inlet and a mixing outlet. The electric heater is used to heat the crude oil, and the electric heater is connected to the crude oil inlet. The dosing device is used to add medicine into the crude oil, and the dosing device is connected to the dosing inlet, and the crude oil and the medicine are mixed in the pipeline mixer. The horizontal ultrasonic coalescing separator includes an ultrasonic vibrator, and the horizontal ultrasonic coalescing separator is provided with a separation inlet, an oil phase discharge outlet and a water phase discharge outlet. The mixing outlet of the pipeline mixer is connected to the separation inlet. After the crude oil is processed by the horizontal ultrasonic coalescing separator, the oil phase is discharged through the oil phase discharge outlet, and the water phase is discharged through the water phase discharge outlet.

[0009] In a possible implementation of the present application, the oil phase discharge outlet is arranged on the side of the water phase discharge outlet away from the separation inlet, the oil phase discharge outlet and the water phase discharge outlet are both arranged at the bottom of the horizontal ultrasonic coalescing separator, and an overflow plate is arranged between the water phase discharge outlet and the oil phase discharge outlet in the horizontal ultrasonic coalescing separator.

[0010] In a possible implementation of the present application, the ultrasonic crude oil water separation system also includes a spiral liquid inlet column; the horizontal ultrasonic coalescing separator also includes an inclined tube sand settling box, a coalescing packing bed and a gas-liquid separation bag; the spiral liquid inlet column is arranged at the liquid inlet end of the horizontal ultrasonic coalescing separator; the crude oil flowing out of the mixing outlet flows into the horizontal ultrasonic coalescing separator through the spiral liquid inlet column; the inclined tube sand settling box, the ultrasonic vibrator and the coalescing packing bed are arranged in sequence in the horizontal ultrasonic coalescing separator along the flow direction of the crude oil; and the gas-liquid separation bag is arranged at one end of the horizontal ultrasonic coalescing separator away from the spiral liquid inlet column.

[0011] In a possible implementation of the present application, the pipeline mixer is of a fixed static spiral blade type, and the length of the mixing section of the pipeline mixer is 8 to 10 times the diameter of the crude oil inlet.

[0012] In a possible implementation of the present application, the inlet of the electric heater is arranged at the lower end of the electric heater, the outlet of the electric heater is arranged at the upper end of the electric heater, the outlet of the electric heater is provided with a temperature measuring device, and the electric heater is configured to adjust the heating power based on the temperature of the crude oil measured by the temperature measuring device; the outlet of the electric heater is provided with a flow measuring device, and the electric heater is configured to adjust the heating power based on the flow of the crude oil measured by the flow measuring device.

[0013] In a possible implementation of the present application, the spiral liquid inlet column includes a central axis and spiral blades, the spiral blades are extended along the spiral line and are arranged on the surface of the central axis, the diameter of the central axis is the same as the inner diameter of the liquid inlet tube of the spiral liquid inlet column, and the pitch of the spiral blades is the same as the inner diameter of the liquid inlet tube of the spiral liquid inlet column; the inner diameter of the spiral liquid inlet column is 3 to 4 times the inner diameter of the liquid inlet tube of the spiral liquid inlet column.

[0014] In a possible implementation of the present application, there is a gap between the bottom of the spiral liquid inlet column and the bottom of the horizontal ultrasonic coalescing separator that is 3 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column; the upper part of the spiral liquid inlet column exceeds the outside of the horizontal ultrasonic coalescing separator by 2 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column.

[0015] In a possible implementation of the present application, the inclined tube sand settling box has an inclination angle of 30 degrees, is made of hydrophilic and oleophobic material, and has a total flow area that is 4 to 6 times the flow area of ​​the liquid inlet pipe of the spiral liquid inlet column.

[0016] In a possible implementation of the present application, the power of the ultrasonic vibrator is 4 to 8 kW, and the processing capacity of the ultrasonic vibrator for crude oil is 100 m3. 3 / h, the material of the ultrasonic vibrator is titanium, and the ultrasonic vibrator is installed to the horizontal ultrasonic coalescing separator through a special flange.

[0017] In a possible implementation of the present application, the coalescing packing bed is made of a hydrophilic and oleophobic material, the length of the coalescing packing bed is 6 to 10 times the inner diameter of the horizontal ultrasonic coalescing separator, and the space between the coalescing packing bed and the inner wall of the horizontal ultrasonic coalescing separator is filled with oil-resistant fiber filter material; pressure monitoring devices are arranged before and after the coalescing packing bed.

[0018] In the ultrasonic crude oil water separation system provided in the embodiment of the present application, by heating the crude oil with an electric heater, compared with the traditional fire tube heating, precise temperature control can be performed, there is no hysteresis and large fluctuations in the fire tube heating, and the risk of local overburning, scaling corrosion and even perforation can be avoided. At the same time, the precise temperature control of the electric heater is also conducive to energy saving. Further, the use of a dosing device to add medicine to the crude oil can accurately add medicine according to the characteristics of the crude oil and the water phase, as an auxiliary standby means, reduce interference with subsequent oil refining, and can also reduce subsequent sewage disposal costs. Further, the use of ultrasonic vibrators for oil-water separation, physically breaking the oil-water flocs, can efficiently separate crude oil and water, and break the interference of emulsified foam. And it can also avoid or reduce the use of agents and reduce the impact on crude oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the equipment connection of the ultrasonic crude oil water separation system provided in an embodiment of the present application.

[0020] Reference numerals:

[0021] 1- pipeline mixer; 2- electric heater; 3- dosing device; 4- horizontal ultrasonic coalescence separator; 41- ultrasonic vibrator; 42- inclined tube sand settling box; 43- coalescence packing bed; 44- gas-liquid separation bag; 45- oil phase discharge outlet; 46- water phase discharge outlet; 47- sediment discharge outlet; 5- spiral liquid inlet column. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the specific technical scheme of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0023] The present application embodiment provides an ultrasonic crude oil water separation system, specifically, referring to Figure 1 The ultrasonic crude oil water separation system includes a pipeline mixer 1, an electric heater 2, a dosing device 3 and a horizontal ultrasonic coalescing separator 4. The pipeline mixer 1 is provided with a crude oil inlet, a dosing inlet and a mixing outlet. The electric heater 2 is used to heat the crude oil and is connected to the crude oil inlet. The dosing device 3 is used to add drugs into the crude oil. The dosing device 3 is connected to the dosing inlet, and the crude oil and the drugs are mixed in the pipeline mixer 1. The horizontal ultrasonic coalescing separator 4 includes an ultrasonic vibrator 41. The horizontal ultrasonic coalescing separator 4 is provided with a separation inlet, an oil phase discharge outlet 45 and a water phase discharge outlet 46. The mixing outlet is connected to the separation inlet. After the crude oil is processed by the horizontal ultrasonic coalescing separator 4, the oil phase is discharged through the oil phase discharge outlet 45, and the water phase is discharged through the water phase discharge outlet 46.

[0024] It is understood that, in the embodiment of the present application, the pipeline mixer 1 can evenly mix different fluids flowing therein. Exemplarily, in the embodiment of the present application, the pipeline mixer 1 can mix crude oil and medicine. It should be noted that, in the embodiment of the present application, the specific structural type of the pipeline mixer 1 is not limited. Exemplarily, a baffle-type, orifice-type or three-way-type pipeline mixer 1 can be used as the pipeline mixer 1 in the embodiment of the present application.

[0025] Corresponding to crude oil and medicine, the pipeline mixer 1 is provided with a crude oil inlet and a medicine inlet, and in order to discharge the mixed medium, the pipeline mixer 1 is also provided with a mixing outlet. Crude oil enters the pipeline mixer 1 through the crude oil inlet, and medicine enters the pipeline mixer 1 through the medicine inlet. The crude oil and medicine are fully mixed in the pipeline mixer 1 and discharged through the mixing outlet.

[0026] In addition, refer to Figure 1 In the embodiment of the present application, before the crude oil is introduced into the pipeline mixer 1, it is also heated by the electric heater 2 to increase the temperature of the crude oil.

[0027] For example, refer to Figure 1 In an embodiment of the present application, the electric heater 2 can be made into a horizontal container-like structure, and an electric heating element is arranged in the horizontal container-like structure to form the electric heater 2. For this, an inlet and an outlet can be arranged on the horizontal container-like structure to allow crude oil to flow into the horizontal container and the heated crude oil to be discharged.

[0028] Furthermore, in some embodiments of the present application, the material of the electric heating element can be set to titanium, and the electric heating element can be set to be U-shaped, so that the electric heating element can have thermal expansion space.

[0029] In addition, in the embodiment of the present application, the specific type of medicine added to the crude oil by the dosing device 3 is not limited. For example, the dosing device 3 can be used to add acid-base regulators, demulsifiers or descaling agents to the crude oil. Correspondingly, a plunger pump controlled by a microcomputer can be used to quantitatively add the above-mentioned medicines to the crude oil. Furthermore, the plunger pump and the flow rate of the crude oil in the electric heater 2 can also be interlocked with the regulating valve, so that the medicine added to the crude oil by the plunger pump meets the ratio requirement with the crude oil. In addition, a manual switching valve can also be set, and in the event of a failure of the above-mentioned regulating valve, the medicine is added to the crude oil through the manual switching valve.

[0030] It is understandable that chemicals such as acid-base regulators, demulsifiers or descaling agents are generally highly corrosive. In this regard, the inner wall of the heating device and the inner wall of the pipeline between the dosing device 3 and the pipeline mixer 1 can be set to have a structure lined with tetrafluoroethylene for protection.

[0031] Furthermore, it can be considered that the horizontal ultrasonic coalescence separator 4 is a horizontal container-like structure, and an ultrasonic vibrator 41 is provided on the horizontal ultrasonic coalescence separator 4. The ultrasonic vibrator can generate ultrasonic waves, which can cause the liquid to vibrate inside, promote the collision and aggregation of suspended droplets in the nano state, form large droplets, break through the buoyancy and gravity difference to achieve stratification, and thus separate the oil phase and the water phase in the crude oil. In addition, ultrasonic waves can also cause the gas dissolved in the crude oil to form larger bubbles, and intermittently cause the bubbles to float up and fly out, which has the effect of assisting degassing.

[0032] It should be noted that excessively strong ultrasound can promote the emulsification of liquid oil and water, and controlling the intensity of ultrasound can polymerize and separate oil. Mechanical impurities in crude oil can form visible snowflakes under the action of ultrasound, and then settle and separate under the action of gravity. Under the premise that the frequency of ultrasound is fixed, the key to regulation is to choose the appropriate power and the distribution of the time periods of the ultrasound that has been in effect and the ultrasound that has stopped acting. When ultrasound forms a standing wave in the fluid medium, the tiny particles suspended in the fluid condense at the wave nodes due to the action of mechanical force, and can form periodic accumulation in space.

[0033] It is understandable that, in order to facilitate the crude oil to enter the horizontal ultrasonic coalescence separator 4, and to facilitate the discharge of the separated oil phase and water phase, a separation inlet, an oil phase discharge port 45 and a water phase discharge port 46 are provided on the horizontal ultrasonic coalescence separator 4. The crude oil and the medicine mixed in the pipeline mixer 1 are passed into the horizontal ultrasonic coalescence separator 4 through the separation inlet. After the crude oil is processed in the horizontal ultrasonic coalescence separator 4, the oil phase and the water phase are separated, the oil phase is discharged through the oil phase discharge port 45, and the water phase is discharged through the water phase discharge port 46.

[0034] Thus, in the ultrasonic crude oil water separation system provided in the embodiment of the present application, by using the electric heater 2 to heat the crude oil, compared with the traditional fire tube heating, it is possible to perform precise temperature control, there is no hysteresis and large fluctuations in the fire tube heating, and the risk of local overburning, scaling corrosion and even perforation can be avoided. At the same time, the precise temperature control of the electric heater 2 is also conducive to energy saving. Further, the dosing device 3 is used to add medicine to the crude oil, which can be accurately added according to the characteristics of the crude oil and the water phase, as an auxiliary standby means, to reduce interference with subsequent oil refining, and also to reduce subsequent sewage disposal costs. Further, the ultrasonic vibrator 41 is used to separate oil and water, and the oil and water flocs are physically broken, which can efficiently separate crude oil and water and eliminate emulsified foam interference. And it can also avoid or reduce the use of agents and reduce the impact on crude oil.

[0035] On this basis, refer to Figure 1 In some embodiments of the present application, the oil phase discharge outlet 45 is arranged on the side of the water phase discharge outlet 46 away from the separation inlet, the oil phase discharge outlet 45 and the water phase discharge outlet 46 are both arranged at the bottom of the horizontal ultrasonic coalescing separator 4, and an overflow plate is arranged between the water phase discharge outlet 46 and the oil phase discharge outlet 45 in the horizontal ultrasonic coalescing separator 4.

[0036] It should be noted that, in the embodiment of the present application, the water phase discharge port 46 and the oil phase discharge port 45 can be both arranged on the side of the horizontal ultrasonic coalescing separator 4 away from the separation inlet, so that the crude oil can be fully processed in the horizontal ultrasonic coalescing separator 4. Figure 1The separation inlet may be disposed at the left end portion of the horizontal ultrasonic coalescing separator 4 , and the oil phase discharge outlet 45 and the water phase discharge outlet 46 may be disposed at the right end portion of the horizontal ultrasonic coalescing separator 4 .

[0037] As for the oil phase discharge port 45 and the water phase discharge port 46 , the oil phase discharge port 45 can be arranged on the side of the water phase discharge port 46 away from the separation inlet, so that the overflow of the crude oil can be better arranged according to the flow direction of the crude oil in the horizontal ultrasonic coalescence separator 4 .

[0038] On this basis, an overflow plate may be provided between the water phase discharge port 46 and the oil phase discharge port 45 to overflow the water phase and the oil phase.

[0039] It should be noted that, for the oil phase and the water phase, the density of the oil phase is less than that of the water phase, and the oil phase is located above the water phase. Therefore, an overflow plate can be provided to separate the oil phase and the water phase.

[0040] For example, refer to Figure 1 A baffle extending in the vertical direction may be provided between the water phase discharge port 46 and the oil phase discharge port 45 to form an overflow plate.

[0041] In this way, as the liquid level on the side of the overflow plate close to the water phase discharge port 46 rises, the oil phase above the water phase will overflow through the overflow plate, allowing the oil phase to reach the side of the overflow plate close to the oil phase discharge port 45, so that the overflow plate can be used to separate the oil phase and the water phase.

[0042] Further, see Figure 1 In the embodiment of the present application, by arranging the oil phase discharge port 45 and the water phase discharge port 46 at the bottom of the horizontal ultrasonic coalescing separator 4, the gravity of the oil phase or the water phase can be utilized to discharge the oil phase and the water phase from the horizontal ultrasonic coalescing separator 4, which is simple and easy to implement.

[0043] On this basis, refer to Figure 1 In some embodiments of the present application, the ultrasonic crude oil water separation system further includes a spiral liquid inlet column 5. The horizontal ultrasonic coalescing separator 4 further includes an inclined tube sand settling box 42, a coalescing packing bed 43 and a gas-liquid separation bag 44. The spiral liquid inlet column 5 is arranged at the liquid inlet end of the horizontal ultrasonic coalescing separator 4; the crude oil flowing out of the mixing outlet flows into the horizontal ultrasonic coalescing separator 4 through the spiral liquid inlet column 5. The inclined tube sand settling box 42, the ultrasonic vibrator 41 and the coalescing packing bed 43 are arranged in sequence in the horizontal ultrasonic coalescing separator 4 along the flow direction of the crude oil. The gas-liquid separation bag 44 is arranged at one end of the horizontal ultrasonic coalescing separator 4 away from the spiral liquid inlet column 5.

[0044] For example, refer to Figure 1In an embodiment of the present application, the spiral liquid inlet column 5 can be set at one end of the horizontal ultrasonic coalescing separator 4, so that the horizontal ultrasonic coalescing separator 4 can be set with one end of the spiral liquid inlet column 5 as the liquid inlet end of the horizontal ultrasonic coalescing separator 4.

[0045] Reference Figure 1 ,by Figure 1 The relative position in is used as an example to illustrate. Figure 1 In the figure, the left end of the horizontal ultrasonic coalescence separator 4 is the liquid inlet end of the horizontal ultrasonic coalescence separator 4. For this, the spiral liquid inlet column 5 can be arranged at the left end of the horizontal ultrasonic coalescence separator 4.

[0046] So, refer to Figure 1 The crude oil forms a top-down rotating process in the spiral liquid inlet column 5, and the solid phase and water are discharged from the lower part of the spiral liquid inlet column 5 by centrifugal force and gravity difference. The mud and sand are deposited at the bottom of the horizontal ultrasonic coalescing separator 4, and the oil phase floats up.

[0047] For this, refer to Figure 1 A sediment discharge port 47 may be provided at the bottom of the horizontal ultrasonic coalescence separator 4 and flushing water may be used to regularly discharge the sediment in the horizontal ultrasonic coalescence separator 4 .

[0048] Further, see Figure 1 In the embodiment of the present application, an inclined tube sand settling box 42, an ultrasonic vibrator 41 and a coalescing packing bed 43 are sequentially arranged inside the horizontal ultrasonic coalescing separator 4 along the flow direction of the crude oil in the horizontal ultrasonic coalescing separator 4.

[0049] It is understandable that, referring to Figure 1 Generally speaking, along the flow direction of the crude oil in the horizontal ultrasonic coalescing separator 4, the spiral liquid inlet column 5, the inclined tube sand settling box 42, the ultrasonic vibrator 41 and the coalescing packing bed 43 are arranged in sequence.

[0050] In this way, the pulse intensification effect of the ultrasonic wave generated by the ultrasonic vibrator can be used to break up and drop off the solid phase dirt condensed on the filler interface in the horizontal ultrasonic agglomeration separator 4, the inclined tube sand settling box 42 or the agglomeration filler bed 43, and then the filler interface can be renewed to achieve a good agglomeration and separation effect similar to that at the time of initial installation, which can save energy and avoid the phenomenon of worsening and serious degradation of conventional equipment.

[0051] It should be noted that, refer to Figure 1In some embodiments of the present application, partitions are provided between the inclined tube sand box 42 and the inner wall of the horizontal ultrasonic coalescing separator 4. The partitions can form a seal between the inclined tube sand box 42 and the inner wall of the horizontal ultrasonic coalescing separator 4, so that the crude oil in the horizontal ultrasonic coalescing separator 4 must flow through the inclined tube sand box 42.

[0052] In this way, the crude oil after the spiral liquid inlet column 5 rotates to remove the silt enters the inclined tube sand box 42, and the oil phase can float and overflow in the inclined tube sand box 42. At this time, the fine particles of silt carried in the crude oil further sink in the inclined tube sand box 42, forming a silt deposition area at the bottom of the inclined tube sand box 42. It should be noted that the silt discharge port 47 corresponding to the spiral liquid inlet column 5 can be set at a position close to the inclined tube sand box 42, so that the silt discharge port 47 can also be used to discharge the silt deposited at the bottom of the inclined tube sand box 42.

[0053] It should be noted that the sediment discharged through the sediment discharge port 47 can be combined with the water discharged through the water phase discharge port 46 and sent to a sewage treatment unit, and can be recycled for oil field reinjection after purification.

[0054] Afterwards, refer to Figure 1 The crude oil after being processed by the inclined tube sand box 42 reaches the area of ​​the ultrasonic vibrator 41, and is processed by ultrasonic waves.

[0055] The crude oil has become obviously clear and transparent after being treated by the ultrasonic vibrator 41, and then the crude oil enters the agglomeration packing bed 43 to further promote oil-water separation.

[0056] The oil in the produced water of the oil field is mainly distributed in the following five states: floating oil (particle size is generally greater than 100μm), dispersed oil (particle size range is 10 to 100μm), emulsified oil (particle size range is 0.1 to 2μm), dissolved oil and solid attached oil. Correspondingly, large eggshell-shaped fillers, small eggshell-shaped fillers or corrugated fillers can be filled in the coalescing filler bed 43. In addition, polypropylene, modified polypropylene or stainless steel and other materials that improve surface wettability, coating properties and adhesion can be used to make fillers, so that gravity separation and coalescence separation can be combined into one, which can significantly improve the oil-water separation effect and enable the equipment to have a long-term good service state. After engineering application, the practical test shows that the effect is good.

[0057] In addition, by controlling the filler formula of the agglomerated filler bed 43, the electrical attraction between molecules can be adjusted, the hydrophilic and lipophilic properties of the filler and the wetting and agglomeration properties can be optimized; the surface peak microstructure can be used to pierce the liquid mass, the oil and water can be decomposed, and the collision and agglomeration can be achieved; through the concave and convex flow field, the liquid can be made to have sufficient tortuous turbulence, and floating and sinking can be blocked, and gravity separation can be achieved.

[0058] For example, refer to Figure 1 In some embodiments of the present application, the coalescing packing bed 43 can be arranged horizontally, and the oil-water mixture enters the coalescing packing bed 43 in the horizontal direction and is discharged through the coalescing packing bed 43. The oil-water mixture is wetted and collides and coalesces in the complex flow channel of the coalescing packing bed 43 to form large oil droplets or oil films, which float up and are removed through the oil discharge holes set on the coalescing packing bed 43 under the action of buoyancy.

[0059] After the crude oil passes through the coalescing packing bed 43, there is basically no foam emulsification phenomenon, and the interface is clean. The gas phase is discharged from the gas-liquid separation package 44 under automatic pressure control.

[0060] The gas phase separation package is provided with a liquid level meter and an emission control valve, and the emission control valve is interlocked with the liquid level meter to prevent cross-liquid. According to the composition of the gas phase, different treatment measures can be taken for the gas phase discharged from the gas-liquid separation package 44. For example, when there is too much impurity gas such as carbon dioxide in the gas phase, the gas phase can be sent to the flare system.

[0061] Thus, in the ultrasonic crude oil water separation system provided in the embodiment of the present application, the spiral liquid inlet column 5, the inclined tube sand settling box 42, the ultrasonic vibrator, and the coalescing packing bed 43 are used for multi-stage processing, which can improve the separation effect of the silt and water in the crude oil and ensure the quality of the oil. At the same time, the gas phase in the crude oil can be discharged through the gas-liquid separation package 44, which can further ensure the quality of the oil.

[0062] In addition, in some embodiments of the present application, the pipeline mixer 1 is of a fixed static spiral blade type, and the length of the mixing section of the pipeline mixer 1 is 8 to 10 times the diameter of the crude oil inlet.

[0063] It should be noted that, in the embodiment of the present application, the pipeline mixer 1 is set to a fixed static spiral blade type, which can simplify the structure of the pipeline mixer 1, make the pipeline mixer 1 have a minimalist mode, and reduce the disassembly, assembly and replacement of the pipeline mixer 1. The length of the mixing section of the pipeline mixer 1 is set to 8 to 10 times the length of the crude oil inlet, which can ensure the mixing effect of the pipeline mixer 1 on crude oil and medicine.

[0064] In addition, in some embodiments of the present application, the inlet of the electric heater 2 is arranged at the lower end of the electric heater, the outlet of the electric heater 2 is arranged at the upper end of the electric heater 2, the outlet of the electric heater 2 is provided with a temperature measuring device, and the electric heater 2 is configured to adjust the heating power based on the temperature of the crude oil measured by the temperature measuring device. The outlet of the electric heater 2 is provided with a flow measuring device, and the electric heater 2 is configured to adjust the heating power based on the flow of the crude oil measured by the flow measuring device.

[0065] For example, refer to Figure 1In some embodiments of the present application, the inlet of the electric heater 2 and the outlet of the electric heater 2 can be respectively arranged at the two ends of the electric heater 2, so that the crude oil can be fully heated by the electric heating element.

[0066] On this basis, a thermometer can be set at the outlet of the electric heater 2 as a temperature measuring device to measure the temperature of the crude oil flowing out of the outlet of the electric heater 2, and the temperature measuring device and the electric heater 2 can be interlocked so that the power of the electric heater 2 can be dynamically adjusted according to the temperature of the crude oil flowing out of the outlet of the electric heater 2, so that the temperature of the crude oil flowing out of the outlet of the electric heater 2 is maintained within the set range.

[0067] In addition, a flow meter can be set at the outlet of the electric heater 2 as a flow measuring device, and the electric heater 2 can be safely locked according to the flow of crude oil flowing out of the outlet of the electric heater 2 measured by the flow measuring device to prevent the electric heater 2 from dry burning.

[0068] Further, see Figure 1 In some embodiments of the present application, the spiral liquid inlet column 5 includes a central axis and a spiral sheet, and the spiral sheet is arranged on the surface of the central axis along the spiral fiber extension. The diameter of the central axis is the same as the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5. The pitch of the spiral sheet is the same as the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5. The inner diameter of the spiral liquid inlet column 5 is 3 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5.

[0069] It is understandable that, referring to Figure 1 In the embodiment of the present application, the central axis provides a mounting base for the spiral blades, and the spiral blades can be mounted on the surface of the central axis around the central axis. By adaptively setting the specifications and dimensions of the central axis and the specifications and dimensions of the spiral liquid inlet column 5, the diameter of the central axis can be made the same as the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5. In this way, the structure of the spiral liquid inlet column 5 can be regular and easy to manufacture.

[0070] In addition, by adjusting the pitch of the spiral sheet, the pitch of the spiral sheet can be made the same as the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5. In this way, the flow area of ​​the spiral sheet can be matched with the flow area of ​​the liquid inlet pipe of the liquid inlet column.

[0071] It should be noted that the inner diameter of the spiral liquid inlet column 5 here refers to the diameter of the outer shell of the spiral liquid inlet column 5. Figure 1 In some embodiments of the present application, the central axis and the spiral blades can be arranged in a cylindrical shell structure, and the inner diameter of the spiral liquid inlet column 5 refers to the inner diameter of the cylindrical shell structure. By setting the inner diameter of the spiral liquid inlet column 5 to 3 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5, the flow capacity of crude oil in the spiral liquid inlet column 5 can be improved, and the processing capacity of the spiral liquid inlet column 5 for crude oil can be improved.

[0072] In addition, in some embodiments of the present application, there is a gap between the bottom of the spiral liquid inlet column 5 and the bottom of the horizontal ultrasonic coalescing separator 4 that is 3 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5; the upper part of the spiral liquid inlet column 5 exceeds the outside of the horizontal ultrasonic coalescing separator 4 by 2 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5.

[0073] It should be noted that in the embodiment of the present application, the gap between the bottom of the spiral liquid inlet column 5 and the bottom of the horizontal ultrasonic coalescing separator 4 can be adjusted to meet 3 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5. Through the above arrangement, there can be sufficient flow area between the spiral liquid inlet column 5 and the horizontal ultrasonic coalescing separator 4.

[0074] In addition, the upper portion of the spiral liquid inlet column 5 can be set to exceed the outer size of the horizontal ultrasonic coalescing separator 4 so that the upper portion of the spiral liquid inlet column 5 exceeds the outer portion of the horizontal ultrasonic coalescing separator 4 by 2 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column 5. Through the above arrangement, the crude oil can have sufficient gravitational potential energy in the spiral liquid inlet column 5 to generate sufficient centrifugal force.

[0075] Reference Figure 1 In some embodiments of the present application, the inclination angle of the inclined tube sand settling box 42 is 30 degrees, the inclined tube sand settling box 42 is made of hydrophilic and oleophobic material, and the total flow area of ​​the inclined tube sand settling box 42 is 4 to 6 times the flow area of ​​the liquid inlet pipe of the spiral liquid inlet column 5.

[0076] For example, the inclined angle of the inclined tube sand box 42 can be adjusted to 30 degrees. In addition, the inclined tube sand box 42 can be made of hydrophilic and oleophobic materials such as polypropylene, modified polypropylene or stainless steel. For example, 316L stainless steel can be used to make the inclined tube sand box 42. In addition, by adaptively setting the size specifications of the inclined tube sand box 42, the total flow area of ​​the inclined tube sand box 42 can be 4 to 6 times the flow area of ​​the liquid inlet pipe of the spiral liquid inlet column 5. Through the above settings, the processing capacity of the inclined tube sand box 42 for crude oil can be improved.

[0077] In addition, in some embodiments of the present application, the power of the ultrasonic vibrator 41 is 4 to 8 kW, and the processing capacity of the ultrasonic vibrator 41 for crude oil is 100 m 3 / h. The material of the ultrasonic vibrator 41 is titanium, and the ultrasonic vibrator 41 is installed to the horizontal ultrasonic coalescence separator 4 through a dedicated flange.

[0078] It is understood that the power of the ultrasonic vibrator 41 can be 4 to 8 kW by selecting the model of the ultrasonic vibrator 41, so that the processing capacity of the ultrasonic vibrator 41 for crude oil is 100 m3.3 / h. The ultrasonic vibrator 41 is made of titanium, which can improve the corrosion resistance of the ultrasonic vibrator 41.

[0079] In addition, a dedicated flange port adapted to the ultrasonic vibrator 41 may be provided on the horizontal ultrasonic coalescing separator 4 , so that the ultrasonic vibrator may be installed on the horizontal ultrasonic coalescing separator 4 through the dedicated flange port.

[0080] Specifically, refer to Figure 1 The above-mentioned special flange port can be set by utilizing the manhole of the horizontal ultrasonic coalescence separator 4. In addition, the above-mentioned special flange port can also be centrally set relative to the horizontal ultrasonic coalescence separator 4.

[0081] In some embodiments of the present application, the coalescing packing bed 43 is made of a hydrophilic and oleophobic material, the length of the coalescing packing bed 43 is 6 to 10 times the inner diameter of the horizontal ultrasonic coalescing separator 4, and the space between the coalescing packing bed 43 and the inner wall of the horizontal ultrasonic coalescing separator 4 is filled with oil-resistant fiber filter material; pressure monitoring devices are arranged before and after the coalescing packing bed 43.

[0082] It is understandable that in the embodiment of the present application, the length of the coalescing packing bed 43 can be adjusted so that the length of the coalescing packing bed 43 is 6 to 10 times the inner diameter of the horizontal ultrasonic coalescing separator 4. Specifically, the coalescing packing bed 43 can be configured to be mixed with stainless steel regular packing and egg trays. Furthermore, the coalescing packing bed 43 can be configured to be clamped front and back relative to the horizontal ultrasonic coalescing separator 4, and the coalescing packing bed 43 can also be configured to fit tightly with the inner wall of the horizontal ultrasonic coalescing separator 4, and the gap between the coalescing packing bed 43 and the horizontal ultrasonic coalescing separator 4 can be filled with oil-resistant fiber filter material, so that there is no fluid short-circuit gap between the coalescing packing bed 43 and the horizontal ultrasonic coalescing separator 4.

[0083] Furthermore, a pressure monitoring device may be provided before and after the coalescing packed bed 43 to monitor the pressure difference before and after the coalescing packed bed 43, so as to determine whether the coalescing packed bed 43 is blocked. In the case that the coalescing packed bed 43 is blocked, it may be regenerated by backwashing.

[0084] It should be noted that in some embodiments of the present application, the strong and weak electricity of the electric heater 2, the dosing device 3 and the horizontal ultrasonic coalescing separator 4 can be specially set to meet the explosion-proof requirements and communication protocol requirements, and can also be designed and manufactured in a standard manner, installed and used. At the same time, the electric heater 2, the dosing device 3 and the horizontal ultrasonic coalescing separator 4 can also be made into three relatively independent parts, which can be combined and connected on site for use.

[0085] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0086] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0087] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0088] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0089] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0090] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An ultrasonic crude oil water separation system, characterized in that: include: A pipeline mixer is provided with a crude oil inlet, a dosing inlet and a mixing outlet; An electric heater, used for heating the crude oil, connected to the crude oil inlet; A dosing device, used for adding medicine into the crude oil, the dosing device is connected to the dosing inlet, and the crude oil and the medicine are mixed in the pipeline mixer; A horizontal ultrasonic coalescence separator, comprising an ultrasonic vibrator, provided with a separation inlet, an oil phase discharge outlet and a water phase discharge outlet, wherein the mixing outlet is connected to the separation inlet, and after the crude oil is processed by the horizontal ultrasonic coalescence separator, the oil phase is discharged through the oil phase discharge outlet, and the water phase is discharged through the water phase discharge outlet.

2. The ultrasonic crude oil water separation system according to claim 1, characterized in that: The oil phase discharge outlet is arranged on the side of the water phase discharge outlet away from the separation inlet, the oil phase discharge outlet and the water phase discharge outlet are both arranged at the bottom of the horizontal ultrasonic coalescing separator, and an overflow plate is arranged between the water phase discharge outlet and the oil phase discharge outlet in the horizontal ultrasonic coalescing separator.

3. The ultrasonic crude oil water separation system according to claim 2, characterized in that: The ultrasonic crude oil water separation system further comprises a spiral liquid inlet column; the horizontal ultrasonic coalescing separator further comprises an inclined tube sand settling box, a coalescing packing bed and a gas-liquid separation bag; the spiral liquid inlet column is arranged at the liquid inlet end of the horizontal ultrasonic coalescing separator; the crude oil flowing out of the mixed outlet flows into the horizontal ultrasonic coalescing separator through the spiral liquid inlet column; The inclined tube sand box, the ultrasonic vibrator and the coalescing packing bed are arranged in sequence along the flow direction of the crude oil in the horizontal ultrasonic coalescing separator; The gas-liquid separation package is arranged at one end of the horizontal ultrasonic coalescence separator away from the spiral liquid inlet column.

4. The ultrasonic crude oil water separation system according to claim 1, characterized in that: The pipeline mixer is of a fixed static spiral blade type, and the length of the mixing section of the pipeline mixer is 8 to 10 times the diameter of the crude oil inlet.

5. The ultrasonic crude oil water separation system according to claim 1, characterized in that: The inlet of the electric heater is arranged at the lower end of the electric heater, the outlet of the electric heater is arranged at the upper end of the electric heater, the outlet of the electric heater is provided with a temperature measuring device, and the electric heater is configured to adjust the heating power based on the temperature of the crude oil measured by the temperature measuring device; The outlet of the electric heater is provided with a flow measurement device, and the electric heater is configured to adjust the heating power based on the flow rate of the crude oil measured by the flow measurement device.

6. The ultrasonic crude oil water separation system according to claim 3, characterized in that: The spiral liquid inlet column includes a central axis and spiral sheets, wherein the spiral sheets are extended along a spiral line and arranged on the surface of the central axis, the diameter of the central axis is the same as the inner diameter of the liquid inlet pipe of the spiral liquid inlet column, and the pitch of the spiral sheets is the same as the inner diameter of the liquid inlet pipe of the spiral liquid inlet column; the inner diameter of the spiral liquid inlet column is 3 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column.

7. The ultrasonic crude oil water separation system according to claim 3, characterized in that: There is a gap between the bottom of the spiral liquid inlet column and the bottom of the horizontal ultrasonic coalescing separator that is 3 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column; the upper part of the spiral liquid inlet column exceeds the outside of the horizontal ultrasonic coalescing separator by 2 to 4 times the inner diameter of the liquid inlet pipe of the spiral liquid inlet column.

8. The ultrasonic crude oil water separation system according to claim 3, characterized in that: The inclined tube sand settling box has an inclination angle of 30 degrees and is made of a hydrophilic and oleophobic material. The total flow area of ​​the inclined tube sand settling box is 4 to 6 times the flow area of ​​the liquid inlet pipe of the spiral liquid inlet column.

9. The ultrasonic crude oil water separation system according to claim 1, characterized in that: The power of the ultrasonic vibrator is 4 to 8 kW, and the processing capacity of the ultrasonic vibrator for the crude oil is 100 m 3 / h, the material of the ultrasonic vibrator is titanium, and the ultrasonic vibrator is installed to the horizontal ultrasonic agglomeration separator through a dedicated flange.

10. The ultrasonic crude oil water separation system according to claim 3, characterized in that: The coalescing packing bed is made of hydrophilic and oleophobic material, the length of the coalescing packing bed is 6 to 10 times the inner diameter of the horizontal ultrasonic coalescing separator, and the space between the coalescing packing bed and the inner wall of the horizontal ultrasonic coalescing separator is filled with oil-resistant fiber filter material; pressure monitoring devices are arranged before and after the coalescing packing bed.

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