CN215232623U

CN215232623U - Vertical oil filter

Info

Publication number: CN215232623U
Application number: CN202120578732.4U
Authority: CN
Inventors: 韩昌亮; 许麒澳; 尹鹏
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-12-21
Anticipated expiration: 2031-03-22

Abstract

The utility model relates to a vertical oil filter belongs to oil development separation technical field. Comprises a vertical tank body, a fan stirring device, a solid grinding device and a bubbling air inlet device. The vertical tank body is provided with a liquid inlet, an air exhaust port, an oil exhaust port, a slag discharge port and an inclined filter screen. The inclined filter screen is positioned in the middle of the vertical tank body and divides the vertical tank body into a solid-liquid mixing area and a gas-liquid mixing area. The fan agitator is equipped with a baffle brush connected in concentric circular fashion with the solids mill. The inner pipe wall of the solid grinding device surrounds the helical blade, and the outer pipe and the annular space are provided with fine filter screen openings. The bubbling air inlet device is positioned at the bottom of the vertical tank body, and filter cotton is arranged in each air hole. The vertical petroleum filter can separate solid from liquid and improve the quality of oil, nitrogen is circularly filled into the oil in a condensing and high-temperature heating mode, light oil and heavy oil are separated according to different boiling points of the oil, the production of oil products is better realized, the viscosity of the oil is reduced, and the flow of heavy oil is facilitated.

Description

Vertical oil filter

Technical Field

The utility model belongs to the technical field of the oil treatment facility, in particular to vertical oil filter.

Background

In the process of oil exploitation, the crude oil is generally a solid-liquid-gas three-phase mixed solution and contains impurities such as solid and moisture, three-phase substances in the crude oil can be separated through a solid-liquid-gas three-phase separator, and the solid-liquid-gas three-phase separator is one of the most common devices in the process of oil field development and production.

The solid-liquid-gas three-phase separator in the related technology generally comprises a solid-liquid separation area, a gas-liquid separation area and an oil-water separation area, after crude oil enters the solid-liquid-gas three-phase separator, the solid-liquid separation is realized through a filter screen, and then the crude oil enters the gas-liquid separation area, so that gas is separated out of the liquid, and the gas is discharged through an exhaust port, so that the gas-liquid separation is realized. And then introducing the oil-water mixture subjected to gas-liquid separation into an oil-water separation zone, wherein crude oil and water in the oil-water mixture are separated by gravity settling due to different densities, and finally, the crude oil and the water are respectively collected, so that the purpose of solid-liquid-gas three-phase separation is achieved.

The solid-liquid-gas three-phase separator in the related technology has the problems of incomplete separation and long time consumption in a separation mode through physical factors of density and saturation of solid-liquid-gas three phases, and particularly, the oil-water separation process needs long settling time, has high viscosity and low separation efficiency, and causes great inconvenience for subsequent collection work.

Disclosure of Invention

An object of the utility model is to provide a vertical oil filter redesigns oil filter overall structure for solid-liquid-gas triphase separation goes on simultaneously, can effectively detach the solid impurity in original through fan stirring device and solid device of milling. Because nitrogen has good stability, nitrogen is used as a medium, and the nitrogen is subjected to high-temperature pressurization treatment, and is fed from an air inlet device in a bubbling air inlet area to drive light oil components and water in crude oil, and then the separation of the light oil, the water and the nitrogen is realized by utilizing the difference of boiling points, so that the high-efficiency cyclic utilization of the nitrogen is realized, the production of petroleum products can be further realized, the content of impurities in the crude oil can be reduced, and the high-efficiency separation of the crude oil is realized.

In order to solve the technical problem, the embodiment of the present disclosure provides a vertical oil filter, which can efficiently improve solid-liquid-gas separation efficiency, and the technical scheme is as follows:

the vertical oil filter comprises a vertical tank body, wherein a liquid inlet, an oil discharge port, a slag discharge port and an exhaust port are formed in the wall of the tank body of the vertical tank body, the slag discharge port and the oil discharge port are positioned at the bottom of the vertical tank body, the vertical tank body is provided with an inclined filter screen, the inclined filter screen is positioned in the middle of the vertical tank body and divides an inner cavity of the vertical tank body into a solid-liquid mixing area positioned above the inclined filter screen and a gas-liquid mixing area positioned below the inclined filter screen, the gas-liquid mixing area is provided with a lower partition plate, the lower partition plate is positioned at the bottom of the gas-liquid mixing area and divides the gas-liquid mixing area into a gas-liquid mixing area and a bubbling air inlet area, a fan stirring device system, the liquid inlet and the exhaust port are positioned in the solid-liquid mixing area, and the solid oil discharge device, the slag discharge port and the exhaust port are positioned in the gas-liquid mixing area; the bubbling air inlet device is positioned in the bubbling air inlet area; a condenser having a mixed gas input port, a light oil output port, and a high-purity low-temperature nitrogen output port; a heater having a high-purity low-temperature nitrogen input port and a high-purity high-temperature nitrogen output port; a pressurizing apparatus having a high-purity high-temperature nitrogen input port and a high-pressure high-temperature high-purity nitrogen output port.

Optionally, the fan agitator system is assembled by the fan, the fan rotating shaft, the fan base and the baffle brush on the basis of the concentric shafts and is located in the solid-liquid mixing zone, and the fan, the fan rotating shaft, the fan base and the baffle brush are detachable parts.

Optionally, the solid milling device is located in the middle of the gas-liquid mixing area, the solid milling device comprises a fine filter screen port, an outer pipe, a motor shaft and helical blades which are coaxially arranged, the outer pipe is sleeved outside the motor shaft, one end of the motor shaft is connected with the fan base and is assembled together with the fan base by taking a concentric shaft as a matching reference, the other end of the motor shaft is communicated with the slag discharge port, the helical blades are located in an annular space, the fine filter screen port is formed in the pipe wall of the outer pipe, the motor shaft and the distributor are communicated, and the distributor is communicated with the slag discharge port.

Optionally, the bubbling air inlet device is located in the bubbling air inlet area and separated from the gas-liquid mixing area (B) by the lower partition plate, the bubbling air inlet device is composed of an air inlet pipeline and filter cotton, the air inlet pipeline is composed of a main pipeline and branch pipelines, and the filter cotton is uniformly arranged at the air inlet of the branch pipelines and is pressurized and inflated by the pressurizing equipment.

Optionally, the inclined filter screen surrounds the tank wall of the vertical tank body by 360 degrees by taking the fan base as a circle center, and one surface of the solid-liquid mixing zone (A) is a concave surface.

Optionally, the inclined screen is spaced from the baffle brush and from the outer tube of the solids milling apparatus.

Optionally, vertical oil filter includes inlet left separation blade, inlet right separation blade, inlet left separation blade and inlet right separation blade with the tank body wall fixed connection of vertical jar of body, the face of inlet left separation blade with the inlet is spaced each other.

The technical scheme provided by the embodiment has the beneficial effects that at least:

the inner cavity of the vertical tank body is divided into a solid-liquid mixing area above the inclined filter screen and a gas-liquid mixing area below the inclined filter screen by the inclined filter screen positioned in the middle of the vertical tank body. Solid impurities in the crude oil enter the solid-liquid mixing area of the vertical tank body from the liquid inlet, and the rotation of the fan enables the solid-liquid mixed solution to flow at an accelerated speed, so that the chopping of the large solid impurities is facilitated. The mixed fluid enters a gas-liquid mixing area below the inclined filter screen after being filtered by the inclined filter screen, so that the filter screen is blocked by fine solid impurities remaining on the inclined filter screen to influence the filtering effect of petroleum, and the baffle brush cleans the impurities on the inclined filter screen by circular motion and then enters the solid milling device along the inclined angle of the inclined filter screen. The screw thread blade of motor shaft further mills solid impurity, is favorable to making solid impurity smoothly discharge from the scum pipe with the form of small volume, and does not block up the scum pipe. In the solid grinding device, a flow channel formed by a helical blade of a motor shaft and an annular space flows to form a rotational flow, and oil content remained by solid impurities is centrifugally separated and discharged from a fine filter screen opening. In the bubbling air inlet area at the lower part of the vertical tank body, high-temperature nitrogen is pressurized by a pressurizing device and then is filled into the gas-liquid mixing area through the bubbling air inlet, the high-temperature nitrogen can evaporate water in oil, a part of light oil with lower boiling point can be converted into gas state to be discharged from the exhaust port at the upper part of the vertical tank body, and the density and viscosity of the remaining oil are increased due to gradual separation of light oil steam. And the charging of the high-temperature nitrogen can also increase the gas content in the oil and the temperature of the oil, so that the viscosity of the oil is reduced, and the heavy oil is discharged from the oil discharge pipe. The water, light oil steam and nitrogen discharged by the exhaust pipe enter the condenser, and are condensed according to different boiling points of the components, so that the separation of oil, water and gas can be realized. And the condensed nitrogen is filled into a heater in a gaseous state for high-temperature heating, and is pressurized by a pressurizing device, and then the bubbling air inlet device is used for continuously filling air into the gas-liquid mixing area in the vertical tank body. In the whole process, nitrogen adopts a circulating working mode, resources are saved, the stability is good, three phases of solid, liquid and gas are separated and carried out simultaneously, and compared with the mode of natural sedimentation adopted for solid, oil and water separation in the related technology, the method does not need to wait for the natural layering of oil and water for a long time, improves the efficiency of solid, oil and water separation, and saves time.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic view of a vertical oil filter structure system provided by the embodiment of the disclosure

FIG. 2 is a schematic structural diagram of a fan stirring apparatus according to an embodiment of the disclosure

FIG. 3 is a schematic structural diagram of a solid milling device provided in an embodiment of the disclosure

FIG. 4 is a schematic structural diagram of a bubbling air inlet pipe according to an embodiment of the disclosure

In the figure: 1. a vertical tank body, 2, a liquid inlet left baffle plate, 3, a liquid inlet, 4, a liquid inlet valve, 5, a fan stirring device, 51, a fan, 52, a fan rotating shaft, 53, a fan base, 54, a baffle brush, 6, a solid grinding device, 61, a fine filter screen port, 62, an outer pipe, 63, a motor shaft, 64, a threaded blade, 7, a bubbling air inlet device, 71, filter cotton, 72, an air inlet pipeline, 721, a main pipeline, 722, a branch pipeline, 723 pipeline distributor, 8, a slag discharge port, 9, a slag discharge valve, 10, a distributor, 11, a lower partition plate, 12, a tank body base, 13, an oil discharge port, 14, an oil discharge valve, 15, an inclined filter screen, 16, a tank body wall, 17, a liquid inlet right baffle plate, 18, an air outlet, 19, an air discharge valve, 20, an air pressure gauge, 21, a condenser, 22, a heater, 23, a pressurizing device, 24 and a light oil processing device, 25. heavy oil treatment device

The specific implementation mode is as follows:

to make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a system schematic diagram of a vertical oil filter according to an embodiment of the present disclosure. As shown in fig. 1, the vertical oil filter system includes a vertical oil filtering structure, a condenser 21, a heater 22, and a pressurizing device 23. Wherein, the vertical petroleum filter comprises a vertical tank body 1, a fan stirring device 5, a solid grinding device 6 and a bubbling air inlet device 7. Wherein, the vertical oil filter comprises a liquid inlet 3, an oil drain port 13, a slag discharge port 8, an exhaust port 18 and an inclined filter screen 15. The liquid inlet 3 and the gas outlet 18 are positioned at the upper part of the vertical tank body 1, the slag outlet 8 and the oil outlet 13 are positioned at the lower part of the vertical tank body 1, the vertical tank body 1 is provided with an inclined filter screen 15, the inclined filter screen 15 is positioned at the middle part of the vertical tank body 1 and divides the inner cavity of the vertical tank body 1 into a solid-liquid mixing area A positioned above the inclined filter screen 15 and a gas-liquid mixing area B positioned below the inclined filter screen 15, the liquid inlet 3 and the gas outlet 18 are positioned in the solid-liquid mixing area A, and the oil outlet 13 and the slag outlet 8 are positioned in the gas-liquid mixing area B.

Fig. 2 is a schematic structural diagram of a fan stirring device 5 according to an embodiment of the present disclosure. As shown in fig. 1 and 2, the fan agitating device 5 is located in the solid-liquid mixing zone a, the fan 51, the fan rotating shaft 52, the fan base 53 and the baffle brush 54 are assembled with reference to concentric shafts, and the fan 51, the fan rotating shaft 52, the fan base 53 and the baffle brush 54 are screw-fitted as detachable parts. The rotation of the fan accelerates the flow of the solid-liquid mixed solution and simultaneously can also cut up large solid impurities. The mixed oil liquid is filtered by the inclined filter screen and then enters a gas-liquid mixing area below the inclined filter screen. The baffle brush cleans impurities on the inclined filter screen in a circular motion, so that fine solid impurities remained on the inclined filter screen are prevented from blocking the filter screen, and the filtering effect of petroleum is prevented from being influenced.

Fig. 3 is a schematic structural diagram of a solid milling device 6 according to an embodiment of the disclosure. The solid milling device 6 is composed of an outer tube 62, a motor shaft 63 and a threaded blade 64 which are coaxially arranged, the outer tube 62 is fully distributed with a fine filter screen port 61, the outer tube 62, the motor shaft 63, the threaded blade 64 and the fan rotating device 5 are assembled by taking a concentric shaft as a reference, wherein one end of the motor shaft close to the solid-liquid mixing area A is closed with the fan rotating device 5, an annular space between the outer tube 62 and the motor shaft 63 is communicated with the solid-liquid mixing area A through an inclined filter screen 15, and solid impurities which are subjected to solid-liquid separation enter the annular space of the solid milling device 6 communicated with the inclined filter screen 22. Because the screw thread blade 64 is arranged in the annular space, the screw thread blade 64 limits a spiral flow channel in the annular space, and simultaneously, solid impurities in the annular space are milled, and form rotational flow in the flow channel under the action of gravity and the rotation of the motor, so that residual oil on the surface of the solid impurities is subjected to centrifugal separation, and the oil separation efficiency is improved.

Fig. 4 is a schematic structural diagram of a bubbling air inlet device 7 according to an embodiment of the present disclosure. The air inlet pipeline 72 is divided into a main pipeline 721 and branch pipelines 722, one end of the main pipeline 721 is connected with the pressurizing device 23, the other end of the main pipeline is connected with a

pipeline distributor

723, 6 branch pipeline openings exist in the pipeline wall of the pipeline distributor 723 at 360 degrees and are connected with the 6 branch pipelines 722, and because the pipeline distributor 723 and the slag discharge opening 8 are arranged in a staggered mode, the lengths of 3 pairs of branch pipes on the pipeline distributor 723 are different, the branch pipe pair on one side close to the slag discharge opening 8 is slightly longer, the branch pipe pair on one side far away from the slag discharge opening 8 is slightly shorter, and the middle branch pipe pair is between the two branch pipe pairs. The air inlets of the 6 branch pipes 723 are all provided with filter cotton 71 and are uniformly arranged on the lower partition plate 11 of the gas-liquid mixing area C at the lower part of the vertical tank body 1. The nitrogen can be uniformly filled into the gas-liquid mixing area C, and the fluidity of the petroleum and the separation efficiency of the oil gas are improved.

In the embodiment of the disclosure, the inner cavity of the vertical tank 1 of the vertical petroleum filter is divided into a solid-liquid mixing area a located above the inclined filter screen 15 and a gas-liquid mixing area B located below the inclined filter screen 15 by the inclined filter screen 15 located in the middle, wherein the liquid inlet 3 is located on the tank wall of the solid-liquid mixing area a, crude oil containing solid impurities, oil, water and gas, in three phases, enters the vertical tank 1 of the vertical petroleum filter from the liquid inlet 3, and the crude oil flows into the inclined filter screen 15 located in the middle from the liquid inlet 3. The solid impurities contained in the crude oil are filtered on the inclined filter screen 15. Because the crude oil has high viscosity and large solid impurities, the rotation of the fan 51 can not only accelerate the flow of the crude oil on the solid-liquid mixing area A on the inclined filter screen 15, but also break up the large solid impurities. The solid impurities contained in the crude oil may block the inclined filter screen 15, and the baffle brush 54 moves in a circular manner by the action of the motor to clean the solid impurities remained on the inclined filter screen 15 in time, and the solid impurities flow into the solid grinding device 6 along the inclined filter screen 15 at a certain angle. The solid impurities subjected to solid-liquid separation enter the annular space of the solid milling device 6 which is communicated with the inclined filter screen 15. Due to the fact that the threaded blades 64 are arranged in the annular space, the threaded blades 64 define a spiral flow channel in the annular space, solid impurities in the annular space are ground, the solid impurities form rotational flow in the flow channel under the action of gravity and the rotation of the motor, and oil liquid remaining on the surfaces of the solid impurities is subjected to centrifugal separation. The solid impurities left after grinding can smoothly flow out from the slag discharge port 8 under the action of gravity, and the solid-liquid separation is realized.

In the embodiment of the disclosure, nitrogen is filled into the gas-liquid mixing zone B from the bubble air inlet zone C positioned at the lower part of the vertical oil filter as a medium, wherein the bubble air inlet zone air inlet pipeline 72 and the slag discharge port 8 are arranged in a staggered manner. As shown in fig. 4, the main pipe 721 of the bubbling air intake region C is respectively communicated with each branch pipe 722, and the branch pipes 722 are uniformly arranged on the lower partition 11 of the gas-liquid mixing region B and the bubbling air intake region C. Wherein, the filtering cotton 71 is arranged at the bubbling air inlet of each branch pipe 722, so that the gas can be uniformly dispersed in the crude oil. The nitrogen is filled into the gas-liquid mixing area from the bubbling air inlet area C in a high-temperature and high-pressure mode, and part of light oil and water with low boiling points in the gas-liquid mixing area are evaporated due to the filling of the high-temperature nitrogen and are discharged through an exhaust port 18 at the upper part of the vertical tank body 1 of the vertical petroleum filter. The density of the crude oil left in the gas-liquid mixing area B is increased due to the evaporation of light oil and water, the viscosity is increased, the crude oil is not easy to flow, and the fluidity of the crude oil is influenced. Factors affecting the mobility of petroleum include temperature and free gas. The high-temperature nitrogen gas can reduce the viscosity of the residual heavy oil, increase the content of free gas in the heavy oil, and improve the fluidity of the heavy oil, so that the heavy oil can be smoothly discharged from the oil discharge port 13 positioned at the lower part of the vertical tank body 1, and the heavy oil product is generated in the heavy oil processing device 25. And the high-temperature nitrogen carries partial light oil and water to be discharged through the upper exhaust port 18 of the vertical tank body 1, the high-temperature nitrogen enters the condenser 21, the light oil and the liquid water with different components are liquefied one by one according to different boiling points of the light oil, the water and the nitrogen, and the light petroleum product is generated in the light oil treatment device 24. High-temperature nitrogen forms high-purity low-temperature nitrogen after condensation, the high-purity low-temperature nitrogen enters the heater 22 to be heated to high temperature, and then the high-purity low-temperature nitrogen is pressurized through the pressurizing device 23, so that the high-efficiency cyclic utilization of the nitrogen is realized, the generation of different types of petroleum products is realized, and the oil-water-gas separation is also realized.

For example, in a possible implementation manner, as for the condenser 21, the heater 22 and the pressurizing device 23, as long as the separation of the light oil, the water and the nitrogen gas is achieved in the condenser 21, and the heater 22 and the pressurizing device 23 heat and pressurize the low-temperature nitrogen gas, the embodiment of the disclosure does not limit this.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A vertical oil filter, the system comprising:

vertical oil filter has inlet (3), oil drain port (13), row's cinder notch (8) and gas vent (18) on the jar body wall (16) of the vertical jar body (1), row's cinder notch (8) and oil drain port (13) are located vertical jar body (1) bottom, the vertical jar body (1) has slope filter screen (15), slope filter screen (15) are located vertical jar body (1) middle part and with the inner chamber of the vertical jar body (1) separate into and be located the solid-liquid mixing district (A) of slope filter screen (15) top and be located the gas-liquid mixing district (B) of slope filter screen (15) below, gas-liquid mixing district (B) has lower baffle (11), baffle (11) are located gas-liquid mixing district (B) bottom and will down gas-liquid mixing district (B) separate into gas-liquid mixing district (B) and bubble intake zone (C), the fan stirring device system (5), the liquid inlet (3) and the air outlet (18) are positioned in the solid-liquid mixing area (A), and the solid grinding device (6), the slag discharge port (8) and the oil discharge port (13) are positioned in the gas-liquid mixing area (B); the bubbling air inlet device (7) is positioned in the bubbling air inlet area; a condenser (21), the condenser (21) having a mixed gas input, a light oil output and a high purity low temperature nitrogen output; a heater (22), the heater (22) having a high purity low temperature nitrogen input and a high purity high temperature nitrogen output; a pressurizing device (23), the pressurizing device (23) having a high-purity high-temperature nitrogen input port and a high-pressure high-temperature high-purity nitrogen output port.

2. A vertical oil filter according to claim 1, wherein: the fan stirring device system (5) is formed by assembling a fan (51), a fan rotating shaft (52), a fan base (53) and a baffle brush (54) together by taking a concentric shaft as a matching reference, and is positioned in the solid-liquid mixing area (A), wherein the fan (51), the fan rotating shaft (52), the fan base (53) and the baffle brush (54) are detachable parts.

3. The vertical petroleum filter according to claim 1, characterized in that the solid milling device (6) is located in the middle of the gas-liquid mixing zone (B), the solid grinding device (6) comprises a fine filter screen port (61), an outer pipe (62), a motor shaft (63) and a helical blade (64) which are coaxially arranged, the outer tube (62) is sleeved outside the motor shaft (63), one end of the motor shaft (63) is connected with the fan base (53), and is assembled with the fan base (53) by taking a concentric shaft as a matching reference, the other end of the motor shaft (63) is communicated with the slag discharge port (8), the helical blade (64) is positioned in the annular space, the wall of the outer pipe (62) is provided with a fine filter screen opening (61), the outer pipe (62) and the motor shaft (63) are communicated with the distributor (10), and the distributor (10) is communicated with the slag discharge port (8).

4. The vertical petroleum filter according to claim 1, characterized in that the bubbling air inlet device (7) is positioned in the bubbling air inlet area (C) and separated from the gas-liquid mixing area (B) by the lower partition plate (11), the bubbling air inlet device (7) is composed of an air inlet pipeline (72) and filter cotton (71), the air inlet pipeline (72) is composed of a main pipeline (721) and a branch pipeline (722), and the filter cotton (71) is uniformly arranged at the air inlet of the branch pipeline (722) and is pressurized and inflated by the pressurizing device (23).

5. The vertical petroleum filter according to claim 1, characterized in that the inclined filter screen (15) surrounds the tank wall (16) of the vertical tank (1) by 360 degrees with the fan base (53) as the center of circle, and one surface of the solid-liquid mixing zone (A) is a concave surface.

6. A vertical petroleum filter according to claim 1, characterised in that the inclined screen (15) is spaced from the baffle brush (54) and from the outer tube (62) of the solids milling apparatus (6).

7. The vertical oil filter according to claim 1, comprising a liquid inlet left baffle (2) and a liquid inlet right baffle (17), wherein the liquid inlet left baffle (2) and the liquid inlet right baffle (17) are fixedly connected with a tank body wall (16) of the vertical tank body (1), and the plate surface of the liquid inlet left baffle (2) is spaced from the liquid inlet (3).