Volatile oil collection device

Abstract

The present disclosure relates to a volatile oil collection device, comprising: an oil storage tank, comprising a liquid inlet, a liquid outlet, and a circulation port; the oil storage tank is used for reacting a mixed liquid to generate stratified light oil, extract, and heavy oil; a liquid inlet device, connected to the liquid inlet, for the mixed liquid to flow into the oil storage tank; a liquid outlet device, connected to the liquid outlet, for the extract to flow out of the oil storage tank; a circulation pipeline, comprising an overflow port and a reflux port connected to the liquid outlet, the overflow port being connected to the liquid outlet, and the reflux port being connected to the liquid inlet device; the extract circulates into the oil storage tank via the liquid outlet device, the liquid outlet, the overflow port, the reflux port, and the liquid inlet device for reaction. The extract can be automatically recovered during the production process, ensuring production continuity.

Description

Technical Field

[0001] The present disclosure relates to the technical field of volatile oil collection devices, and in particular to a volatile oil collection device capable of automatically collecting and separating oil and water. Background Art

[0002] During the extraction production process, one of the steps is the volatile oil collection process. In traditional volatile oil collection devices, operators need to stay by the sight glass of the volatile oil collection device, observe the oil-water separation liquid level of the volatile oil in real time, and manually open and close the valve to collect the volatile oil and recover the extract according to the changes in the oil-water separation liquid level. The extract cannot be automatically recovered during the production process, affecting production continuity. Summary of the Invention

[0003] In view of the above problems, the present disclosure provides a volatile oil collection device to solve the production operation problem that the operator needs to observe the sight glass of the volatile oil collection device in person on site and cannot automatically recover the extraction liquid.

[0004] The present disclosure provides a volatile oil collection device, comprising: an oil storage tank, the oil storage tank including a liquid storage chamber, the liquid storage chamber being used for stratification reaction of a mixed liquid to obtain light oil, extract and heavy oil in sequence from top to bottom; the oil storage tank also including a liquid inlet arranged near the top of the oil storage tank and a liquid outlet located at the liquid level of the extract; a circulation pipeline connected between the liquid outlet and the liquid inlet, the liquid storage chamber and the circulation pipeline being maintained at the same atmospheric pressure so that the liquid level in the liquid storage chamber is the same as the liquid level in the circulation pipeline, and the extract circulates into the liquid storage chamber via the circulation pipeline.

[0005] In the volatile oil collection device of this scheme, the mixed liquid flows into the liquid storage chamber through the liquid inlet, and a volatilization reaction is carried out in the liquid storage chamber. According to the characteristics of the reaction products, light oil, extract and heavy oil are layered from top to bottom in the oil storage tank. Among them, the liquid outlet is located in the range where the extract is located. According to the principle of communicating vessels, the liquid level height in the circulation pipeline is the same as the liquid level height in the liquid storage chamber, so that the extract can flow back to the liquid inlet through the liquid outlet and the circulation pipeline, so that the mixed oil can undergo a cyclic volatilization process and then be cyclically collected, thereby replacing the method of manual real-time observation and manual collection, and further improving the efficiency of volatile oil reaction and collection.

[0006] In some embodiments, the volatile oil collection device further comprises a liquid inlet and a liquid outlet. The liquid inlet is connected to the liquid inlet and is used to allow the mixed liquid to flow into the oil storage tank; the liquid outlet is connected to the liquid outlet and is used to allow the extracted liquid to flow out of the oil storage tank. The liquid outlet has a lower liquid outlet rate than the liquid inlet. With this embodiment of the volatile oil collection device, since the liquid inlet rate is higher than the liquid outlet rate, and the volatile oil reaction continues within the oil storage tank, continuously generating light oil in the upper layer, extract in the middle layer, and heavy oil in the lower layer, as the light oil reserves increase, the pressure of the light oil in the upper layer on the extract in the middle layer gradually increases. Based on the communicating vessel principle, under the action of this pressure, the extract flows through the liquid outlet to the circulation pipeline. Furthermore, the circulation pipeline maintains a constant atmospheric pressure connection with the oil storage tank. Therefore, when the liquid outlet rate is set lower than the liquid inlet rate, the volatile oil reaction in the oil storage tank can be continuously maintained.

[0007] In some embodiments, the liquid inlet device includes a first outer distribution pipe located outside the oil storage tank and a first inner distribution pipe located in the liquid storage cavity. The first inner distribution pipe is connected to the first outer distribution pipe, and the first inner distribution pipe is arranged in a horizontal ring shape. Along the circumferential direction of the first inner distribution pipe, a plurality of first small holes are provided on the outer annular surface and / or the inner annular surface of the first inner distribution pipe, and the mixed liquid or the extracted liquid flows into the liquid storage cavity through the plurality of first small holes. The volatile oil collection device of this scheme is adopted, and the liquid inlet device is extended into the liquid storage cavity, and the structure of the first inner distribution pipe is provided at the extended section, and a plurality of first small holes are provided on the inner annular surface and / or the outer annular surface of the first inner distribution pipe. The plurality of first small holes are arranged along the circumferential direction to facilitate the volatile oil to achieve a uniform liquid inlet flow rate, and to avoid or slow down the liquid impact during liquid inlet that destroys the liquid surface stratification.

[0008] In some embodiments, the liquid discharge device includes a second inner distribution pipe located within the liquid storage chamber and a second outer distribution pipe located outside the oil storage tank, the second inner distribution pipe being connected to the second outer distribution pipe; the second inner distribution pipe being vertically disposed; a plurality of second small holes being disposed on the wall of the second inner distribution pipe along the height direction of the second inner distribution pipe, through which the extracted liquid flows out of the oil storage tank; and the second outer distribution pipe being connected to the circulation pipeline. In the volatile oil collection device of this embodiment, the liquid discharge device is extended into the liquid storage chamber, and a portion of the extended portion is provided with a second inner distribution pipe structure, with the plurality of second small holes being arranged along the height direction of the second inner distribution pipe. Based on the communicating vessel principle, the extracted liquid in the liquid storage chamber flows into the circulation pipeline through the plurality of second small holes. Since the extracted liquid flowing out of this portion is circulated back to the liquid inlet device, the plurality of second small holes disposed in a vertical direction are used to limit the flow rate of the volatile oil outflow, thereby preventing or slowing down the excessive flow rate during the outflow and affecting the separation of the liquid surface. Furthermore, the liquid outlet is positioned at the level of the extracted liquid to ensure the outflow of the extracted liquid.

[0009] In some embodiments, the plurality of first small holes are arranged at the same height and do not overlap with each other, so as to further achieve a uniform liquid inlet speed. Furthermore, the plurality of second small holes do not overlap with each other.

[0010] In some embodiments, the inner diameter of the first small hole is greater than or equal to the diameter of the second small hole, so as to further achieve a liquid inlet speed greater than a liquid outlet speed.

[0011] In some embodiments, the number of the first small holes is greater than the number of the second small holes, so as to further achieve a liquid inlet speed greater than a liquid outlet speed.

[0012] In some embodiments, the circulation pipeline includes an upper circulation port and a reflux port, the upper circulation port is connected to the side wall of the oil storage tank, and the upper circulation port is located above the position of the first inner distribution pipe; the reflux port is respectively connected to the upper circulation port, the liquid outlet and the liquid inlet device, and the reflux port is located below the position of the liquid outlet; the extracted liquid circulates into the liquid storage chamber via the second inner distribution pipe, the liquid outlet, the second outer distribution pipe, the reflux port, the first outer distribution pipe and the first inner distribution pipe.

[0013] The volatile oil collection device of this scheme needs to collect the heavy oil, extract and light oil obtained after the volatilization reaction. The reflux port is set below the liquid outlet so that the extract can flow to the reflux port under the drive of its own weight, and then flow back to the liquid storage chamber through the liquid inlet device.

[0014] In addition, the upper circulation port is located above the first internal distribution pipe. Based on the principle of communicating vessels, the liquid level in the liquid storage chamber will not exceed the position of the first internal distribution pipe. Even if the liquid level in the liquid storage chamber reaches the highest liquid level, the highest liquid level will be lower than the upper circulation port. The upper circulation port can ensure that the liquid storage chamber and the circulation pipeline are maintained at the same atmospheric pressure, and can prevent the liquid level obtained by the volatilization reaction from overflowing from the top of the oil storage tank, and prevent the extractant flowing back into the oil storage tank from breaking the separated oil and water again.

[0015] In some embodiments, the circulation pipeline further includes an overflow port, the overflow port being connected to the upper circulation port and the return port respectively, and the overflow port and the first inner distribution pipe being located at the same height to match the highest liquid level in the liquid storage chamber.

[0016] In some embodiments, the circulation pipeline further includes a first branch and a second branch, wherein the first branch is connected between the overflow port and the return port, and the second branch is connected between the upper circulation port, the overflow port, the second external distribution pipe, and the return port. These two branch pipes are provided to provide a flow path for the extract in the circulation pipeline, facilitating the connection between the upper circulation port, the overflow port, the second external distribution pipe, and the return port.

[0017] In some embodiments, a lower liquid outlet valve is further provided on the second branch, and the lower liquid outlet valve is provided near the reflux port, and the lower liquid outlet valve and the reflux port are located at the same height, and the lower liquid outlet valve is used to open and close the reflux port. An oil outlet is provided at the bottom of the oil storage tank, and a bottom liquid outlet valve is provided near the oil outlet, and the bottom liquid outlet valve is used to open and close the oil outlet to control the outflow of the heavy oil. The bottom liquid outlet valve is located below the reflux port. When the volatile oil collection device in this scheme is used, when the bottom liquid outlet valve and the lower liquid outlet valve are closed, the mixed liquid begins to separate and circulate on its own, and the extracted liquid passes through the liquid outlet device, the second branch, the overflow port, the first branch, the reflux port and the liquid inlet device in turn, and flows back to the liquid storage chamber to realize automatic recovery of the extracted liquid in the oil storage tank, without the need to manually open and close the valve to recover the extracted liquid.

[0018] For example, a middle outlet valve is provided in the outflow direction of the second external distribution pipe. When the bottom outlet valve is opened and the middle and lower outlet valves are closed, the heavy oil at the bottom of the liquid storage chamber flows out through the oil outlet, thereby achieving collection of the heavy oil. After the heavy oil is collected, the bottom outlet valve is closed and the lower and middle outlet valves are opened, allowing the light oil at the top layer to flow out through the reflux port or be collected.

[0019] In some embodiments, the circulation pipeline further includes a third branch connected between the lower outlet valve and the bottom outlet valve, so that both the lower outlet valve and the bottom outlet valve are at the same atmospheric pressure as the liquid storage chamber, thereby connecting the entire circulation pipeline to the atmosphere of the liquid storage chamber, facilitating the application of the communicating vessel principle.

[0020] In some embodiments, the bottom outlet valve includes a first bottom outlet valve and a second bottom outlet valve, each disposed on the third branch line and on either side of the oil outlet. Along the flow direction of the heavy oil, the first bottom outlet valve is provided with an oil receiving port, facing the outlet direction; the second bottom outlet valve is provided away from the oil receiving port. When performing the aforementioned heavy oil collection process, the first bottom outlet valve is opened, and the heavy oil is collected through the oil receiving port.

[0021] In some embodiments, the oil storage tank is a straight cylindrical structure with an aspect ratio of (3-8): 1. It is used for loading and volatilization of the mixed liquid, and its structure is conducive to the separation of light and heavy oils.

[0022] In some embodiments, the sum of the cross-sectional areas of the first apertures is between three and eight times the cross-sectional area of ​​the liquid inlet. For example, when the diameters of the first and second apertures are 6 mm, 92 first apertures may be provided, and the sum of the cross-sectional areas of these 92 first apertures may be five times the cross-sectional area of ​​the 25 mm liquid inlet. This effectively ensures liquid inlet efficiency while also reducing the impact of the drop in liquid inlet on the mixed liquid surface. Furthermore, because the cross-sectional area of ​​each second aperture is much smaller than the cross-sectional area of ​​the liquid outlet, liquid outflow is slower, thereby preventing the stratification between the heavy oil and the extract from being disrupted, further limiting the outflow of the heavy oil.

[0023] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of a volatile oil collection device in one embodiment of the present disclosure;

[0026] Figure 2This is a schematic diagram of the main structure of the first inner distribution pipe in one embodiment of the present disclosure;

[0027] Figure 3 This is a schematic diagram of the top view of the first inner distribution pipe in one embodiment of the present disclosure.

[0028] The accompanying drawings in the specific implementation manner are as follows:

[0029] 100. Volatile oil collection device;

[0030] 101. Oil storage tank; 102. Liquid inlet; 103. Liquid outlet; 104. Liquid inlet device; 105. Circulation pipeline; 106. Oil outlet; 107. Liquid outlet device;

[0031] 1011, liquid storage chamber;

[0032] 1041, first inner distribution pipe; 1042, first outer distribution pipe;

[0033] 1051, upper circulation port; 1052, reflux port; 1053, overflow port; 1054, middle liquid outlet valve; 1055, lower liquid outlet valve; 1056, bottom liquid outlet valve; 1057, first branch; 1058, second branch; 1059, third branch; 10411, inner annular surface; 10412, outer annular surface; 10413, first small hole; 10561, first bottom liquid outlet valve; 10562, second bottom liquid outlet valve;

[0034] 1071. Second inner distribution pipe; 1072. Second outer distribution pipe. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification and claims of the present disclosure and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0038] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0040] In the description of the embodiments of the present disclosure, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0041] In the description of the embodiments of the present disclosure, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present disclosure.

[0042] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0043] The present inventors have noticed that existing volatile oil collectors rely entirely on real-time human observation and manual operation to achieve the collection of volatile oil and recovery of extracts, resulting in extremely low production efficiency.

[0044] Based on the above considerations, in order to improve the efficiency of volatile oil collection, the author of the disclosure has conducted in-depth research and designed a volatile oil collection device that can realize the automatic collection of volatile oil and the recycling and reuse of the extract, so as to further realize the cyclic reaction of the mixed liquid in the volatile oil collection device and the cyclic collection of the extract, light oil and heavy oil.

[0045] refer to Figure 1-Figure 3 The present disclosure provides a volatile oil collection device 100, comprising: an oil storage tank 101, the oil storage tank 101 including a liquid storage chamber 1011, the liquid storage chamber 1011 is used for stratification reaction of the mixed liquid, and light oil, extract and heavy oil are obtained from top to bottom in sequence; the oil storage tank 101 also includes a liquid inlet 102 arranged near the top of the oil storage tank 101 and a liquid outlet 103 located at the liquid level of the extract; a circulation pipeline 105, connected between the liquid outlet 103 and the liquid inlet 102, and the liquid storage chamber 1011 and the circulation pipeline 105 are maintained at the same atmospheric pressure, so that the liquid level in the liquid storage chamber 1011 is the same as the liquid level in the circulation pipeline 105, and the extract circulates into the liquid storage chamber 1011 through the circulation pipeline 105. In the volatile oil collection device 100 of this embodiment, the mixed liquid flows into the liquid storage chamber 1011 through the liquid inlet 102, and a volatilization reaction is carried out in the liquid storage chamber 1011. According to the characteristics of the reaction products, light oil, extract and heavy oil are layered from top to bottom in the oil storage tank 101. Among them, the liquid outlet 103 is located within the range where the extract is located. According to the principle of communicating vessels, the liquid level in the circulation pipeline 105 is the same as the liquid level in the liquid storage chamber 1011, so that the extract can flow back to the liquid inlet 102 through the liquid outlet 103 and the circulation pipeline 105, so that the mixed oil can undergo a cyclic volatilization process and then be cyclically collected, thereby replacing the method of manual real-time observation and manual collection, and further improving the efficiency of volatile oil reaction and collection.

[0046] The present disclosure does not impose any specific restrictions on the structure of the liquid outlet 103 and the liquid inlet 102, as long as they can achieve the corresponding functions of communication and leakage prevention. It should be noted that the oil storage tank 101 of the volatile oil collection device 100 of the present disclosure can include the oil storage tank 101 body and a cover body disposed on the top of the oil storage tank 101 body. The cover body and the oil storage tank 101 body can be non-sealed to allow the liquid storage chamber 101 to be connected to the atmosphere. Furthermore, the liquid storage chamber 1011 is connected to the circulation pipeline 105 to further ensure that the liquid storage chamber 1011 and the circulation pipeline 105 are under the same atmospheric pressure. Exemplarily, the liquid outlet 103 and the liquid inlet 102 of the present disclosure can be integral with the oil storage tank 101. Alternatively, exemplarily, the liquid outlet 103 and the liquid inlet 102 of the present disclosure can be separate structures from the oil storage tank 101, each of which can be detachably connected to the oil storage tank 101. The present disclosure does not limit the specific connection structure between the interconnected structures, as long as the functions of connectivity and leakage prevention are achieved.

[0047] Exemplarily, the volatile oil collection device 100 further includes a liquid inlet device 104 and a liquid outlet device 107. The liquid inlet device 104 is connected to the liquid inlet 102 and is used to allow the mixed liquid to flow into the oil storage tank 101. The liquid outlet device 107 is connected to the liquid outlet 103 and is used to allow the extracted liquid to flow out of the oil storage tank 101. The liquid outlet rate of the liquid outlet device 107 is lower than the liquid inlet rate of the liquid inlet device 104. In the volatile oil collection device 100 of this embodiment, since the liquid inlet rate is higher than the liquid outlet rate, and the volatile oil reaction is continuously carried out in the oil storage tank 101, the reaction process continuously generates light oil in the upper layer, extract in the middle layer, and heavy oil in the lower layer. As the light oil reserves increase, the pressure of the light oil in the upper layer on the extract in the middle layer gradually increases. Based on the principle of communicating vessels, and under the action of this pressure, the extract flows through the liquid outlet 103 to the circulation pipeline 105. Moreover, the circulation line 105 and the oil storage tank 101 are kept in communication at the same atmospheric pressure. Based on this, when the liquid outflow rate is set to be lower than the liquid inflow rate, the reaction of the volatile oil in the oil storage tank 101 can be promoted to continue.

[0048] Specifically, refer to Figure 2 The liquid inlet device 104 includes a first outer distribution pipe 1042 located outside the oil storage tank 101 and a first inner distribution pipe 1041 located within the liquid storage chamber 1011. The first inner distribution pipe 1041 is connected to the first outer distribution pipe 1042 and is arranged in a horizontal, annular shape. Multiple first small holes 10413 are provided along the circumference of the first inner distribution pipe 1041 on its outer annular surface 10412 and / or inner annular surface 10411. The mixed liquid or extract flows into the liquid storage chamber 1011 through these first small holes 10413. In the volatile oil collection device 100 of this scheme, the liquid inlet device 104 is extended into the liquid storage chamber 1011, and the extended section is set as a first inner distribution pipe 1041 structure. A plurality of first small holes 10413 are set on the inner annular surface 10411 and / or the outer annular surface 10412 of the first inner distribution pipe 1041. The plurality of first small holes 10413 are arranged along the circumferential direction to facilitate the volatile oil to achieve a uniform liquid inlet flow rate, avoid or slow down the liquid impact during liquid inlet to destroy the liquid surface stratification.

[0049] Exemplarily, the liquid surface stratification is the liquid surface stratification of light oil, extract and heavy oil in this solution.

[0050] According to production needs, exemplary, reference Figure 2 and Figure 3, the multiple first small holes 10413 in the first inner distribution pipe 1041 in the present disclosure can be arranged circumferentially on the inner annular surface 10411. Alternatively, they can also be arranged circumferentially on the outer annular surface 10412. Alternatively, they can also be arranged on both the inner annular surface 10411 and the outer annular surface 10412. The above three methods can be determined based on the requirements of the collection device for the liquid inlet speed. In addition, the aperture size of the first small hole 10413 and the spacing between adjacent holes in this solution are not limited, as long as the liquid can flow into the oil storage tank 101.

[0051] Exemplarily, the liquid outlet device 107 includes a second inner distribution pipe 1071 located in the liquid storage chamber 1011 and a second outer distribution pipe 1072 located outside the oil storage tank 101, and the second inner distribution pipe 1071 is connected to the second outer distribution pipe 1072; the second inner distribution pipe 1071 is vertically arranged; along the height direction of the second inner distribution pipe 1071, a plurality of second small holes are provided on the tube wall of the second inner distribution pipe 1071, and the extracted liquid flows out of the oil storage tank 101 through the plurality of second small holes; the second outer distribution pipe 1072 is connected to the circulation pipeline 105. The volatile oil collection device 100 of the present embodiment extends the liquid outlet device 107 into the liquid storage chamber 1011, and a second inner distribution pipe 1071 is provided at the extended section. A plurality of second small holes are arranged along the height direction of the second inner distribution pipe 1071. Based on the principle of communicating vessels, the extract in the liquid storage chamber 1011 flows into the circulation pipeline 105 through the plurality of second small holes. Since the extract flowing out from this place is circulated back to the liquid inlet device 104, the plurality of second small holes arranged in the vertical direction are used to limit the flow rate of the volatile oil outlet, thereby avoiding or slowing down the excessive flow rate during the liquid discharge and affecting the stratification of the liquid surface. At the same time, the liquid outlet 103 is set at the liquid level where the extract is located, which can also ensure the outflow of the extract.

[0052] According to production needs, for example, the multiple second small holes in the second inner distribution pipe 1071 of the present disclosure can be arranged in multiple rows and a single column. Alternatively, according to public needs, for example, the multiple second small holes in the second inner distribution pipe 1071 of the present disclosure can also be arranged in multiple rows and multiple columns. The above two methods can be determined based on the requirements of the collection device for the liquid discharge rate. In addition, the aperture size of the second small holes and the spacing between adjacent holes in this solution are not limited, as long as they can achieve liquid outflow from the oil storage tank 101.

[0053] Exemplarily, the plurality of first apertures 10413 are arranged at the same height and do not overlap with each other, thereby further achieving a uniform liquid inlet rate. Furthermore, the plurality of second apertures do not overlap with each other, thereby further achieving a uniform liquid outlet rate.

[0054] For example, the inner diameter of the first small hole 10413 is greater than or equal to the diameter of the second small hole, so as to further achieve a higher liquid inlet speed than a liquid outlet speed.

[0055] Exemplarily, the number of the first small holes 10413 is greater than the number of the second small holes, so as to further achieve a liquid inlet speed greater than a liquid outlet speed.

[0056] Specifically, the circulation pipeline 105 includes an upper circulation port 1051 and a reflux port 1052. The upper circulation port 1051 is connected to the side wall of the oil storage tank 101, and the upper circulation port 1051 is located above the position of the first inner distribution pipe 1041; the reflux port 1052 is respectively connected to the upper circulation port 1051, the liquid outlet 103 and the liquid inlet device 104, and the reflux port 1052 is located below the position of the liquid outlet 103; the extracted liquid circulates into the liquid storage chamber 1011 via the second inner distribution pipe 1071, the liquid outlet 103, the second outer distribution pipe 1072, the reflux port 1052, the first outer distribution pipe 1042 and the first inner distribution pipe 1041. In the volatile oil collection device 100 of this embodiment, since it is necessary to collect the heavy oil, extract and light oil obtained after the volatilization reaction, the reflux port 1052 is set below the liquid outlet 103 so that the extract can flow to the reflux port 1052 driven by its own weight, and then flow back to the liquid storage chamber 1011 through the liquid inlet device 104.

[0057] In addition, the upper circulation port 1051 is located above the first inner distribution pipe 1041. Based on the principle of communicating vessels, the liquid level in the liquid storage chamber 1011 will not exceed the position of the first inner distribution pipe 1041. Even if the liquid level in the liquid storage chamber 1011 reaches the highest liquid level, the highest liquid level will be lower than the upper circulation port 1051. The upper circulation port 1051 can ensure that the liquid storage chamber 1011 and the circulation pipeline 105 are maintained at the same atmospheric pressure, and can prevent the liquid level obtained by the volatilization reaction from overflowing from the top of the oil storage tank 101, and prevent the extractant flowing back into the oil storage tank 101 from breaking the separated oil and water again.

[0058] For example, the upper circulation port 1051 and the return port 1052 in the present disclosure may be structures integrally formed with the circulation pipeline 105. Alternatively, for example, the upper circulation port 1051 and the return port 1052 in the present disclosure may be separate structures provided on the circulation pipeline 105, capable of being detachably connected to the circulation pipeline 105. The present disclosure does not limit the specific structure of the upper circulation port 1051 and the return port 1052, as long as they can adapt to the structure of the oil storage tank 101 and the circulation pipeline 105 of the present disclosure.

[0059] Further references Figure 1The circulation pipeline 105 further includes a first branch 1057 and a second branch 1058. The first branch 1057 is connected between the overflow port 1053 and the return port 1052, and the second branch 1058 is connected between the upper circulation port 1051, the overflow port 1053, the second external distribution pipe 1072, and the return port 1052. The two branch pipelines are provided to provide a flow path for the extract in the circulation pipeline 105, facilitating the communication between the upper circulation port 1051, the overflow port 1053, the second external distribution pipe 1072, and the return port 1052.

[0060] The present disclosure does not limit the paths of the first branch 1057 and the second branch 1058 , as long as the normal use of the circulation pipeline 105 can be ensured.

[0061] Exemplarily, a lower outlet valve 1055 is further provided on the second branch 1058. Lower outlet valve 1055 is positioned near the reflux port 1052 and at the same height as the reflux port 1052. Lower outlet valve 1055 is used to open and close reflux port 1052. An oil outlet 106 is provided at the bottom of the oil storage tank 101. A bottom outlet valve 1056 is positioned near the oil outlet 106. This valve is used to open and close the oil outlet 106 to control the outflow of heavy oil. Bottom outlet valve 1056 is located below the reflux port 1052.

[0062] When the volatile oil collection device 100 of the present embodiment is used and the bottom outlet valve 1056 and the lower outlet valve 1055 are closed, the mixed liquid begins to separate and circulate on its own. The extracted liquid passes through the liquid outlet device 107, the second branch 1058, the overflow port 1053, the first branch 1057, the reflux port 1052 and the liquid inlet device 104 in sequence and flows back into the liquid storage chamber 1011, thereby realizing automatic recovery of the extracted liquid in the oil storage tank 101, without the need to manually open and close valves to recover the extracted liquid.

[0063] For example, a middle outlet valve 1054 is provided in the outflow direction of the second outer distribution pipe 1072. When the bottom outlet valve 1056 is opened and the middle outlet valve 1054 and the lower outlet valve 1055 are closed, the heavy oil at the bottom of the liquid storage chamber 1011 flows out through the oil outlet 106, thereby achieving the collection of the heavy oil. After the heavy oil is collected, the bottom outlet valve 1056 is closed, and the lower outlet valve 1055 and the middle outlet valve 1054 are opened. The light oil at the top layer can flow out through the reflux port 1052 or be collected.

[0064] Exemplarily, the circulation pipeline 105 further includes a third branch 1059, which is connected between the lower liquid outlet valve 1055 and the bottom liquid outlet valve 1056. This ensures that the lower liquid outlet valve 1055 and the bottom liquid outlet valve 1056 are at the same atmospheric pressure as the liquid storage chamber 1011, thereby allowing the entire circulation pipeline 105 to communicate with the atmosphere of the liquid storage chamber 1011, thereby facilitating the application of the communicating vessel principle.

[0065] Specifically, bottom outlet valve 1056 includes a first bottom outlet valve 10561 and a second bottom outlet valve 10562, each located on third branch 1059 and on either side of oil outlet 106. Along the flow direction of heavy oil, first bottom outlet valve 10561 is provided with an oil receiving port, facing the outflow direction; second bottom outlet valve 10562 is located away from the oil receiving port. During the aforementioned heavy oil collection process, first bottom outlet valve 10561 is opened, and the heavy oil is collected through the oil receiving port.

[0066] Exemplarily, the oil storage tank 101 is a straight cylindrical structure, and the aspect ratio of the oil storage tank 101 may be (3-8):1.

[0067] For example, the oil storage tank 101 has an aspect ratio of 5:1. It is used for loading and volatilizing mixed liquids, and its structure is conducive to the separation of light and heavy oils.

[0068] Exemplarily, the spacing between two adjacent first apertures is between two and five times the aperture size of the first apertures. The spacing between two adjacent second apertures is between two and five times the aperture size of the second apertures. The combined cross-sectional area of ​​the first apertures 10413 is between three and eight times the cross-sectional area of ​​the liquid inlet 102. Exemplarily, when the aperture size of the first apertures 10413 and the second apertures is 6 mm, 92 first apertures 10413 can be provided. The combined cross-sectional area of ​​these 92 first apertures 10413 is five times the cross-sectional area of ​​the 25 mm liquid inlet 102. This effectively ensures liquid inlet efficiency while also reducing the impact of the incoming liquid on the mixed liquid surface. Furthermore, because the cross-sectional area of ​​each second aperture is much smaller than that of the liquid outlet, liquid outlet is slower, preventing the stratification between the heavy oil and the extract from being disrupted, further limiting the outflow of the heavy oil.

[0069] In summary, the extracted volatile oil mixture passes through the liquid inlet device 104 and the multi-porous distribution pipe (liquid inlet device 104 and liquid outlet device 107), limiting the flow rate of the volatile oil mixture. This allows the volatile oil mixture to be fully separated within the volatile oil cylinder with a length-to-diameter ratio of 5:1, and is separated from top to bottom into light oil, extract, and heavy oil. During this process, the light oil is in the upper layer, the extract is in the middle layer, and the heavy oil is in the bottom layer. Opening the liquid outlet device 107, closing the first and second bottom outlet valves 10561 and 10562, and closing the lower outlet valve 1055, the volatile oil mixture begins to separate and circulate. The extract in the collection device passes through the liquid discharge device 107 and the overflow port 1053 in the circulation pipeline 105 to the reflux port 1052 in the circulation pipeline 105. Through the setting of the circulation pipeline 105, the effect of automatically recovering the extract is achieved in the production process, and there is no need to manually open and close the valve to recover the extract. At the same time, the extract passes through the liquid discharge device 107 and the multi-porous distribution pipe of the liquid discharge device 107 to limit the liquid discharge speed of the extract, that is, the extract passes through the overflow port 1053 to the reflux port 1052, so that the reflux of the extract will not disrupt the stratification of the mixed liquid in the volatile oil cylinder. The overflow port 1053 is set at the same height as the liquid inlet device 104, so that the volatile oil mixed liquid can continuously enter, and it can also ensure that the extract refluxes from the overflow port 1053, will not overflow in the volatile oil cylinder, and will not affect the stratification of the mixed liquid, thereby realizing the function of automatically collecting and separating oil and water.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A volatile oil collection device, characterized in that: include: An oil storage tank, comprising a liquid storage chamber for stratification reaction of a mixed liquid to obtain light oil, extract and heavy oil in sequence from top to bottom; the oil storage tank further comprising a liquid inlet disposed near the top of the oil storage tank and a liquid outlet located at the level of the extract; the top of the oil storage tank is provided with a cover; a circulation pipeline connected between the liquid outlet and the liquid inlet, wherein the liquid storage chamber and the circulation pipeline are maintained at the same atmospheric pressure so that the liquid level in the liquid storage chamber is the same as the liquid level in the circulation pipeline, and the extraction liquid circulates into the liquid storage chamber through the circulation pipeline; A liquid inlet device and a liquid outlet device, wherein the liquid inlet device is connected to the liquid inlet, and the liquid inlet device is used for the mixed liquid to flow into the oil storage tank; the liquid outlet device is connected to the liquid outlet, and the liquid outlet device is used for the extracted liquid to flow out of the oil storage tank; the liquid outlet speed of the liquid outlet device is lower than the liquid inlet speed of the liquid inlet device; the liquid inlet device includes a first outer distribution pipe located outside the oil storage tank and a first inner distribution pipe located in the liquid storage cavity, the first inner distribution pipe is connected to the first outer distribution pipe, and the first inner distribution pipe is arranged in a horizontal annular shape; along the circumferential direction of the first inner distribution pipe, the first A plurality of first small holes are provided on the outer annular surface and / or the inner annular surface of the inner distribution pipe, and the mixed liquid or the extracted liquid flows into the liquid storage chamber through the plurality of first small holes; the liquid outlet device includes a second inner distribution pipe located in the liquid storage chamber and a second outer distribution pipe located outside the oil storage tank, and the second inner distribution pipe is connected to the second outer distribution pipe; the second inner distribution pipe is vertically arranged; a plurality of second small holes are provided on the tube wall of the second inner distribution pipe along the height direction of the second inner distribution pipe, and the extracted liquid flows out of the oil storage tank through the plurality of second small holes; the second outer distribution pipe is connected to the circulation pipeline; In which, the circulation pipeline includes an upper circulation port and a reflux port, the upper circulation port is connected to the side wall of the oil storage tank, and the upper circulation port is located above the position of the first inner distribution pipe; the reflux port is respectively connected to the upper circulation port, the liquid outlet and the liquid inlet device, and the reflux port is located below the position of the liquid outlet; the extracted liquid circulates into the liquid storage chamber via the second inner distribution pipe, the liquid outlet, the second outer distribution pipe, the reflux port, the first outer distribution pipe and the first inner distribution pipe.

2. The volatile oil collection device according to claim 1, characterized in that: The plurality of first small holes are arranged at the same height and do not overlap with each other.

3. The volatile oil collection device according to claim 2, characterized in that: The plurality of second small holes do not overlap with each other.

4. The volatile oil collection device according to claim 3, characterized in that: The inner diameter of the first small hole is greater than or equal to the diameter of the second small hole.

5. The volatile oil collection device according to claim 4, characterized in that: The number of the first small holes is greater than the number of the second small holes.

6. The volatile oil collection device according to claim 1, characterized in that: The circulation pipeline further includes an overflow port, which is communicated with the upper circulation port and the return port respectively, and the overflow port and the first inner distribution pipe are located at the same height.

7. The volatile oil collection device according to claim 6, characterized in that: The circulation pipeline also includes a first branch and a second branch. The first branch is connected between the overflow port and the return port, and the second branch is connected between the upper circulation port, the overflow port, the second external distribution pipe and the return port.

8. The volatile oil collection device according to claim 7, characterized in that: The second branch is further provided with a lower liquid outlet valve, which is arranged close to the reflux port and is located at the same height as the reflux port. The lower liquid outlet valve is used to open and close the reflux port. An oil outlet is provided at the bottom of the oil storage tank, and a bottom outlet valve is provided near the oil outlet. The bottom outlet valve is used to open and close the oil outlet to control the outflow of the heavy oil. The bottom liquid outlet valve is located below the reflux port; The circulation pipeline further includes a third branch, and the third branch is connected between the lower liquid outlet valve and the bottom liquid outlet valve.

9. The volatile oil collection device according to claim 8, characterized in that: The bottom liquid outlet valve includes a first bottom liquid outlet valve and a second bottom liquid outlet valve, which are respectively arranged on the third branch and on both sides of the oil outlet. Along the flow direction of the heavy oil, an oil receiving port is provided in the outflow direction of the first bottom liquid outlet valve; the second bottom liquid outlet valve is arranged away from the oil receiving port.

10. The volatile oil collection device according to claim 4, characterized in that: The sum of the cross-sectional areas of the first small holes is between three and eight times the cross-sectional area of ​​the liquid inlet.

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