Oil-water separation device

Abstract

The application discloses an oil-water separation device. The oil-water separation device comprises a separation tube, a liquid inlet tube, a backflow tube and a first oil outlet tube. The separation tube comprises a main body section and a converging section arranged on the upper side of the main body section. The flow area of the converging section is smaller than that of the main body section. The inlet of the liquid inlet tube is arranged on the outer side of the separation tube, and the outlet of the liquid inlet tube is arranged in the main body section and is lower than the inlet of the liquid inlet tube in the height direction. The inlet of the backflow tube is arranged at the bottom of the main body section, and the outlet of the backflow tube is arranged on the outer side of the separation tube, and the separation tube and the backflow tube form a communicating vessel. The outlet of the backflow tube is located between the inlet of the liquid inlet tube and the outlet of the liquid inlet tube in the height direction. The water in the oil-water mixture is discharged from the separation tube through the backflow tube. The inlet of the first oil outlet tube is arranged in the converging section. The outlet of the first oil outlet tube is arranged on the outer side of the separation tube and is lower than the inlet of the first oil outlet tube in the height direction to discharge light oil. The light oil is further converged in the converging section, and is easier to collect and separate.

Description

Technical Field

[0001] This application relates to the field of chemical production technology, and in particular to an oil-water separation device. Background Technology

[0002] Essential oil extraction equipment can prepare various natural plant essential oils using steam distillation, but currently there is no effective dedicated oil-water separator. On the one hand, the separation of oil and water mixtures is poor during essential oil preparation, resulting in significant essential oil loss. On the other hand, separators with excessively large diameters produce excessively thin oil layers that are difficult to collect.

[0003] It should be noted that the statements in this background section only provide background information relevant to this application and do not necessarily constitute prior art. Summary of the Invention

[0004] This application provides an oil-water separation device to make light oil easier to collect and separate.

[0005] This application provides an oil-water separation device, including a separation pipe, an inlet pipe, a return pipe, and a first oil drain pipe. The separation pipe includes a main body section and a converging section disposed on the upper side of the main body section, the flow area of ​​the converging section being smaller than the flow area of ​​the main body section. The inlet of the inlet pipe is located outside the separation pipe, and the outlet of the inlet pipe is located inside the main body section and is lower than the inlet of the inlet pipe in the height direction. An oil-water mixture enters the separation pipe through the inlet pipe. The inlet of the return pipe is located at the bottom of the main body section, and the outlet of the return pipe is located outside the separation pipe, forming a communicating vessel between the separation pipe and the return pipe. The outlet of the return pipe is located between the inlet and the outlet of the inlet pipe in the height direction. Water in the oil-water mixture is discharged from the separation pipe through the return pipe. The inlet of the first oil drain pipe is located inside the converging section, and at least a portion of the inlet of the first oil drain pipe is located above the outlet of the return pipe. The outlet of the first oil drain pipe is located outside the separation pipe and is lower than the inlet of the first oil drain pipe in the height direction to discharge light oil.

[0006] In some embodiments, the oil-water separator further includes a flow regulating device. The flow regulating device includes a baffle disposed within the inlet pipe.

[0007] In some embodiments, the flow regulating device further includes a flow regulating valve. The flow regulating valve is disposed on the inlet pipe.

[0008] In some embodiments, the converging section includes a first converging section. The flow area of ​​the first converging section gradually decreases from a first end near the main body section to a second end away from the main body section. The inlet of the first drain pipe is located near the second end of the first converging section.

[0009] In some embodiments, the converging section includes a first converging section and a second converging section. A first end of the first converging section is connected to the main body section, and a second end of the first converging section is connected to the second converging section. From the first end of the first converging section near the main body section to the second end of the first converging section away from the main body section, the flow area of ​​the first converging section gradually decreases. The flow area of ​​the second converging section is smaller than the flow area of ​​the main body section. The inlet of the first drain pipe is located within the second converging section.

[0010] In some embodiments, the second convergence segment is transparent.

[0011] In some embodiments, the separator further includes a vent pipe. The vent pipe is disposed above the converging section, with a first end connected to the upper end of the converging section and a second end connected to the atmosphere.

[0012] In some embodiments, the vent pipe includes a vertical vent section and a curved vent section. One end of the vertical vent section is connected to a converging section, and the other end of the vertical vent section is connected to one end of the curved vent section, the other end of which extends downward.

[0013] In some embodiments, the inlet of the first oil pipe is a bevel. The lowest point of the bevel is level with the highest point of the outlet of the return pipe in the height direction.

[0014] In some embodiments, the oil-water separator further includes a second oil drain pipe for discharging heavy oil. The inlet of the second oil drain pipe is located at the bottom of the main body section and is connected to the inlets of the separation pipe and the return pipe via a tee pipe. The outlet of the second oil drain pipe is located outside the separation pipe and is lower than the inlet of the second oil drain pipe in the height direction.

[0015] In some embodiments, the inlet pipe has a vertical inlet section and a curved inlet section. The first end of the vertical inlet section forms the inlet of the inlet pipe, the second end of the vertical inlet section communicates with the first end of the curved inlet section, and the second end of the curved inlet section extends upward to form the outlet of the inlet pipe.

[0016] In some embodiments, the reflux pipe includes a horizontal reflux section, a vertical reflux section, and a curved reflux section. The horizontal reflux section is located at the bottom of the main body section, and one end of the horizontal reflux section forms the inlet of the reflux pipe. The other end of the horizontal reflux section communicates with the vertical reflux section. The vertical reflux section connects the horizontal reflux section and the curved reflux section. One end of the curved reflux section communicates with the vertical reflux section, and the other end of the curved reflux section is horizontally positioned and forms the outlet of the reflux pipe.

[0017] In some embodiments, the first oil drain pipe includes a vertical oil drain section and an inclined oil drain section. One end of the vertical oil drain section forms the inlet of the first oil drain pipe, and the other end of the vertical oil drain section is connected to one end of the inclined oil drain section. The inclined oil drain section extends downward at an inclination, and the other end of the inclined oil drain section forms the outlet of the first oil drain pipe.

[0018] In some embodiments, at least a portion of the body segment is transparent.

[0019] Based on the technical solution provided in this application, an oil-water separation device includes a separation pipe, an inlet pipe, a return pipe, and a first oil drain pipe. The separation pipe includes a main body section and a converging section disposed on the upper side of the main body section. The flow area of ​​the converging section is smaller than the flow area of ​​the main body section. The inlet of the inlet pipe is located outside the separation pipe, and the outlet of the inlet pipe is located inside the main body section and is lower than the inlet of the inlet pipe in the height direction. The oil-water mixture enters the separation pipe through the inlet pipe. The inlet of the return pipe is located at the bottom of the main body section, and the outlet of the return pipe is located outside the separation pipe. The separation pipe and the return pipe form a communicating vessel, and the outlet of the return pipe is located between the inlet and outlet of the inlet pipe in the height direction. Water in the oil-water mixture is discharged from the separation pipe through the return pipe. The inlet of the first oil drain pipe is located inside the converging section, and at least a portion of the inlet of the first oil drain pipe is located above the outlet of the return pipe. The outlet of the first oil drain pipe is located outside the separation pipe and is lower than the inlet of the first oil drain pipe in the height direction to discharge light oil. Because the flow area of ​​the convergence section is smaller than that of the main section, light oil will further converge in the convergence section, increasing the overall thickness of the light oil layer, thus making it easier to collect and separate.

[0020] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the oil-water separation device according to an embodiment of this application.

[0023] In the picture:

[0024] 1. Separator pipe; 11. Main body section; 12. Converging section; 121. First converging section; 122. Second converging section; 13. Vent pipe; 2. Inlet pipe; 3. Return pipe; 4. First drain pipe; 5. Second drain pipe; 6. Flow control valve. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0028] refer to Figure 1This application provides an oil-water separation device, including a separation pipe 1, an inlet pipe 2, a return pipe 3, and a first oil drain pipe 4. The separation pipe 1 includes a main body section 11 and a converging section 12 disposed on the upper side of the main body section 11. The flow area of ​​the converging section 12 is smaller than the flow area of ​​the main body section 11. The inlet of the inlet pipe 2 is located outside the separation pipe 1, and the outlet of the inlet pipe 2 is located inside the main body section 11 and is lower than the inlet of the inlet pipe 2 in the height direction. The oil-water mixture enters the separation pipe 1 through the inlet pipe 2. The inlet of the return pipe 3 is located at the bottom of the main body section 11, and the outlet of the return pipe 3 is located outside the separation pipe 1. The separation pipe 1 and the return pipe 3 form a communicating vessel, and the outlet of the return pipe 3 is located between the inlet and the outlet of the inlet pipe 2 in the height direction. Water in the oil-water mixture is discharged from the separation pipe 1 through the return pipe 3. The inlet of the first oil drain pipe 4 is located inside the converging section 12, and at least a portion of the inlet of the first oil drain pipe 4 is located above the outlet of the return pipe 3. The outlet of the first oil drain pipe 4 is located outside the separator pipe 1 and is lower in the height direction than the inlet of the first oil drain pipe 4 so as to discharge light oil.

[0029] The principle of the oil-water separation device in this application is as follows: Because light oil has a density less than water and is immiscible with water, the oil-water mixture automatically separates into layers after entering the separation pipe 1. The light oil floats on top of the water. When the oil-water mixture is stably input into the separation pipe 1 and reaches dynamic equilibrium, the water level will eventually stabilize at the position indicated by the dashed line AA in the figure. At this point, the water can be discharged through the outlet of the return pipe 3, while the light oil level will stabilize above the dashed line AA and be discharged through the outlet of the first oil drain pipe 4, thus achieving oil-water separation. Furthermore, because the flow area of ​​the converging section 12 is smaller than that of the main section 11, the light oil will further converge in the converging section 12, increasing the overall thickness of the light oil layer, making it easier to collect and separate.

[0030] To slow down the rate at which the oil-water mixture enters the separator 1 and enhance the oil-water stratification effect, in some embodiments, the oil-water separator further includes a flow regulating device, which includes a baffle disposed within the inlet pipe 2. Specifically, the baffle can be disposed at the inlet of the inlet pipe 2. When the oil-water mixture enters the separator 1 through the inlet pipe 2, it first passes through the baffle, and the flow rate is reduced by the buffering effect of the baffle before entering the separator 1. After the flow rate is reduced, the oil-water mixture, upon entering the separator 1, can more fully stratify due to its different densities and immiscibility, thereby enhancing the separation effect.

[0031] In some embodiments, the flow regulating device further includes a flow regulating valve 6, which is disposed on the inlet pipe 2. Specifically, the flow regulating valve 6 is positioned closer to the outlet of the inlet pipe 2 relative to the baffle. The flow regulating valve 6 can further control the flow rate of the oil-water mixture.

[0032] In some embodiments, the inlet pipe 2 has a vertical inlet section and a curved inlet section. The first end of the vertical inlet section forms the inlet of the inlet pipe 2, and the second end of the vertical inlet section communicates with the first end of the curved inlet section. The second end of the curved inlet section extends upward and forms the outlet of the inlet pipe 2. The upwardly extended portion of the curved inlet section can further reduce the flow rate of the oil-water mixture entering the separator pipe 1.

[0033] In some embodiments, reference Figure 1 The converging section includes a first converging section 121. From the first end of the first converging section 121 near the main section 11 to the second end of the first converging section 121 away from the main section 11, the flow area of ​​the first converging section 121 gradually decreases. The inlet of the first oil drain pipe 4 is located near the second end of the first converging section 121. The gradually decreasing flow area of ​​the first converging section 121 allows light oil to converge in the first converging section 121, thereby achieving a better separation effect. Specifically, the main section can have a uniform flow area in the height direction, and the first converging section has a large diameter reduction ratio. Therefore, from the first end to the second end of the first converging section, the oil layer convergence effect becomes stronger and stronger.

[0034] In some embodiments, the converging section 12 includes a first converging section 121 and a second converging section 122. The first end of the first converging section 121 is connected to the main body section 11, and the second end of the first converging section 121 is connected to the second converging section 122. From the first end of the first converging section 121 near the main body section 11 to the second end of the first converging section 121 away from the main body section 11, the flow area of ​​the first converging section 121 gradually decreases. The flow area of ​​the second converging section 122 is smaller than the flow area of ​​the main body section 11. The inlet of the first oil drain pipe 4 is located in the second converging section 122.

[0035] Specifically, in this embodiment, the main body segment 11 is a hollow cylinder, and the first converging segment 121 is a hollow cone. The large-diameter end of the first converging segment 121 has the same inner diameter as the main body segment 11, and the ratio of the small-diameter segment to the large-diameter end of the first converging segment 121 is 1:4.17.

[0036] In some embodiments, the second converging section 122 is transparent. Specifically, the second converging section 122 may be made of tempered glass to facilitate observation of the light oil collection. More specifically, the second converging section 122 is connected to the first converging section 121 by a stainless steel flange and bolts to improve structural stability.

[0037] In some embodiments, the separation tube 1 further includes a vent tube 13, which is disposed above the converging section 12. The first end of the vent tube 13 is connected to the upper end of the converging section 12, and the second end of the vent tube 13 is connected to the atmosphere. Specifically, the vent tube 13 can maintain a constant pressure inside the separation tube 1, thereby improving the stability of the liquid feeding process and the separation process.

[0038] In some embodiments, the vent pipe 13 includes a vertical vent section and a curved vent section. One end of the vertical vent section is connected to the converging section 12, and the other end of the vertical vent section is connected to one end of the curved vent section. The other end of the curved vent section extends downward. Specifically, the curved vent section can reduce the loss of light oil due to evaporation after converging, and can also reduce the risk of impurities in the environment falling directly into the separation pipe 1 through the vent pipe 13 and causing pollution.

[0039] In some embodiments, the inlet of the first oil pipe 4 is a bevel, and the lowest point of the bevel is level with the highest point of the outlet of the return pipe 3 in the height direction. Specifically, as shown... Figure 1 As shown, according to the principle of communicating vessels, after reaching dynamic equilibrium, the water level in the separation pipe 1 will eventually stabilize at the position shown by the dotted line AA and will not enter the first oil pipe 4. Furthermore, setting the inlet of the first oil pipe 4 as a bevel can make it easier for the light oil to enter the first oil pipe 4 after it converges.

[0040] In some embodiments, the first oil drain pipe 4 includes a vertical drain section and an inclined drain section. One end of the vertical drain section forms the inlet of the first oil drain pipe 4, and the other end of the vertical drain section is connected to one end of the inclined drain section. The inclined drain section extends downward at an angle, and its other end forms the outlet of the first oil drain pipe 4. Specifically, the angle between the inclined drain section and the vertical drain section is between 105° and 120° to facilitate the discharge of light oil and reduce oil residue. Furthermore, a valve can be installed in the inclined drain section to control the discharge of light oil.

[0041] In some embodiments, the return pipe 3 includes a horizontal return section, a vertical return section, and a curved return section. The horizontal return section is located at the bottom of the main body section 11, and one end of the horizontal return section forms the inlet of the return pipe 3. The other end of the horizontal return section communicates with the vertical return section. The vertical return section connects the horizontal return section and the curved return section. One end of the curved return section communicates with the vertical return section, and the other end of the curved return section is horizontally positioned and forms the outlet of the return pipe 3. Specifically, the angle between the curved return section and the vertical return section is 90° to facilitate water drainage.

[0042] In some embodiments, a valve is provided on the horizontal section of the return pipe 3 to make the drainage controllable.

[0043] In some embodiments, the return bend can be connected to a horizontal pipe to collect the discharged water. Specifically, the height of the horizontal pipe should be equal to the inlet of the first drain pipe 4.

[0044] To improve the applicability of the oil-water separation device, in some embodiments, the device further includes a second oil drain pipe 5 for discharging heavy oil. The inlet of the second oil drain pipe 5 is located at the bottom of the main body section 11 and is connected to the inlets of the separation pipe 1 and the return pipe 3 via a tee pipe. The outlet of the second oil drain pipe 5 is located outside the separation pipe 1 and is lower than its inlet in the height direction. Specifically, since the density of heavy oil is greater than that of water, when heavy oil needs to be collected, the valve of the return pipe 3 is closed. At this time, the first oil drain pipe 4 is used as a drain pipe, and the oil-water mixture will automatically separate into layers within the separation pipe 1. The heavy oil sinks to the lower layer of water and accumulates at the bottom of the separation pipe 1, and then is discharged from the separation pipe 1 through the second oil drain pipe 5 located at the bottom of the main body section 11. During the process, the water level will eventually stabilize at the dotted line AA and be discharged from the outlet of the first oil drain pipe 4. Therefore, the oil-water separation device can ultimately achieve the separation of light oil, heavy oil, and water.

[0045] In some embodiments, a valve is provided on the second oil discharge pipe 5 to make the discharge of heavy oil controllable.

[0046] In some embodiments, at least a portion of the main body segment 11 is transparent to facilitate observation. Specifically, in this embodiment, the main body segment 11 is divided into an upper part and a lower part, the lower part being transparent and made of tempered glass to allow workers to easily observe the oil-water separation process. More specifically, the lower part of the main body segment 11 is connected to the upper part of the main body segment 11 by a stainless steel flange and bolts to improve structural stability.

[0047] The above description is merely an exemplary illustration of the oil-water separation device provided in this application for the separation of oil-water mixtures. The device provided in this application can also be used for the separation of other mixed liquids.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. An oil-water separation device, characterized by, The application relates to a separation tube (1) comprising a main body section (11) and a converging section (12) arranged on the upper side of the main body section (11), the flow area of the converging section (12) being smaller than that of the main body section (11); a liquid inlet pipe (2) having an inlet arranged on the outer side of the separation tube (1) and an outlet arranged in the main body section (11) and lower than the inlet in the height direction, through which the oil-water mixture enters the separation tube (1); a backflow pipe (3) having an inlet arranged at the bottom of the main body section (11) and an outlet arranged on the outer side of the separation tube (1), the separation tube (1) and the backflow pipe (3) forming a communicating vessel, the outlet of the backflow pipe (3) being arranged between the inlet and the outlet of the liquid inlet pipe (2) in the height direction, through which the water in the oil-water mixture is discharged from the separation tube (1); and a first oil outlet pipe (4) having an inlet arranged in the converging section (12) and being a bevelled cut, the lowest point of the bevelled cut being level with the highest point of the outlet of the backflow pipe (3) in the height direction, and an outlet arranged on the outer side of the separation tube (1) and lower than the inlet in the height direction to discharge light oil. The application further comprises a flow regulating device comprising a baffle arranged in the liquid inlet pipe (2). The flow regulating device further comprises a flow regulating valve (6) arranged on the liquid inlet pipe (2). The converging section comprises a first converging section (121), the flow area of which gradually decreases from the first end close to the main body section (11) to the second end away from the main body section (11), and the inlet of the first oil outlet pipe (4) is arranged close to the second end. The converging section (12) comprises a first converging section (121) and a second converging section (122), the first end of the first converging section (121) being connected to the main body section (11), the second end of the first converging section (121) being connected to the second converging section (122), the flow area of the first converging section (121) gradually decreasing from the first end close to the main body section (11) to the second end away from the main body section (11), the flow area of the second converging section (122) being smaller than that of the main body section (11), and the inlet of the first oil outlet pipe (4) being arranged in the second converging section (122). The second converging section (122) is transparent.

2. The oil-water separation device of claim 1, wherein, ​ 3. The oil-water separation device of claim 2, wherein, ​ 4. The oil-water separation device of claim 1, wherein, ​ 5. The oil-water separation device of claim 1, wherein, ​ 6. The oil-water separation device of claim 5, wherein, ​ 7. The oil-water separation device of claim 1, wherein, The separation tube (1) further comprises a vent pipe (13) arranged above the converging section (12), a first end of the vent pipe (13) being in communication with an upper end of the converging section (12), and a second end of the vent pipe (13) being in communication with the atmosphere.

8. The oil-water separation device of claim 7, wherein, The vent pipe (13) comprises a vent vertical section and a vent curved section, one end of the vent vertical section being in communication with the converging section (12), and the other end of the vent vertical section being in communication with one end of the vent curved section, and the other end of the vent curved section extending downward.

9. The oil-water separation device of claim 1, wherein, A second oil discharge pipe (5) for discharging heavy oil is further included, an inlet of the second oil discharge pipe (5) being arranged at a bottom of the main body section (11) and being in communication with inlets of the separation tube (1) and the return pipe (3) through a tee joint, and an outlet of the second oil discharge pipe (5) being arranged outside the separation tube (1) and being lower than the inlet of the second oil discharge pipe (5) in the height direction.

10. The oil-water separation device of any one of claims 1-9, wherein, The liquid inlet pipe (2) comprises a liquid inlet vertical section and a liquid inlet curved section, a first end of the liquid inlet vertical section forming an inlet of the liquid inlet pipe (2), and a second end of the liquid inlet vertical section being in communication with a first end of the liquid inlet curved section, and a second end of the liquid inlet curved section extending upward and forming an outlet of the liquid inlet pipe (2).

11. The oil-water separation device of any one of claims 1-9, wherein, The return pipe (3) comprises a return horizontal section, a return vertical section and a return curved section, the return horizontal section being arranged at a bottom of the main body section (11), one end of the return horizontal section forming an inlet of the return pipe (3), and the other end of the return horizontal section being in communication with the return vertical section, the return vertical section being connected between the return horizontal section and the return curved section, one end of the return curved section being in communication with the return vertical section, and the other end of the return curved section being arranged horizontally and forming an outlet of the return pipe (3).

12. The oil-water separation device of any one of claims 1-9, wherein, The first oil discharge pipe (4) comprises an oil discharge vertical section and an oil discharge inclined section, one end of the oil discharge vertical section forming an inlet of the first oil discharge pipe (4), the other end of the oil discharge vertical section being in communication with one end of the oil discharge inclined section, the oil discharge inclined section extending downward and inclined, and the other end of the oil discharge inclined section forming an outlet of the first oil discharge pipe (4).

13. The oil-water separation device of any one of claims 1-9, wherein, At least part of the main body section (11) is transparent.

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