A water knockout device for removing interfacial water and an oil storage tank and method comprising the same

Abstract

The application discloses a water cutting device for cutting interlayer water, and an oil product storage tank and a method comprising the same, and belongs to the technical field of oil product storage tanks. The water cutting device for cutting interlayer water disclosed by the application can realize the cutting of interlayer water of oil-water stratification at different positions in the oil product storage tank by arranging an interlayer water cutting device in the water cutting line pipe and controlling the position of the interlayer water cutting device through a lifting device. Meanwhile, the water cutting device can be freely switched with the water cutting line pipe, and the cutting of interlayer water between tank bottom water and heavy oil and light oil can be realized at the same time. The technical problem that the existing water cutting device cannot simultaneously cut interlayer water between heavy oil and light oil is solved, the interlayer water in the oil product in the tank can be removed, and fluctuations or production accidents of downstream devices caused by water in the oil product are avoided.

Description

Technical Field

[0001] This invention belongs to the field of oil storage tank technology, specifically relating to a water cutter for removing interlayer water and an oil storage tank containing the same and a method thereof. Background Technology

[0002] Oil storage tanks are essential facilities in refineries, oil fields, oil depots, and other industrial and domestic applications. These tanks typically have an automatic water-cutting device connected to the bottom to remove water from the oil, preventing water from affecting its properties or disrupting the stable operation of downstream systems. The water-cutting device contains a float with a gravity between that of oil and water. The float moves up and down with the rise and fall of the oil-water interface due to buoyancy. When water accumulates at the bottom of the tank, the float rises with the water level and connects to the valve core of the drain valve via a connecting rod. The movement of the float drives a lever system through the connecting rod. The lever system amplifies the buoyancy difference, thereby controlling the opening and closing of the drain valve. When the float rises to a certain height, the lever action opens the drain valve, initiating the water-cutting process. As the water-cutting process continues, the water level at the bottom of the tank gradually decreases, and the float descends accordingly. When the water is completely removed, the float rests on a ball seat, closing the drain valve via the lever system and automatically stopping the water-cutting process, preventing the oil from being cut out.

[0003] However, existing automatic water cutters for oil storage tanks are connected to the water cutter via a lead-out line from the bottom of the tank. After the oil and water separate into layers in the tank, the water cutter can only remove the water at the bottom of the tank. If the oil is heavier than the water, the automatic water cutter will be filled with heavy oil, making it impossible to remove the water layer between the heavy and light oil. Summary of the Invention

[0004] The purpose of this invention is to provide a water cutter for removing interlayer water, an oil storage tank containing the water cutter, and a method thereof, to solve the technical problem that existing water cutters cannot simultaneously remove interlayer water between heavy oil and light oil.

[0005] To achieve the above objectives, the present invention employs the following technical solution: This invention discloses a water cutter for removing intercalated water, comprising an intercalated water removal device, a lifting device, a water cutter, a water cut sight glass, and a water cut line pipe; the water cut line pipe is installed at the bottom of the oil storage tank and connected to the oil-water inlet of the water cutter via a pipeline; the intercalated water removal device is installed inside the water cut line pipe, one end of the intercalated water removal device is connected to the lifting device, and the other end is connected to the oil-water inlet of the water cutter and the water cut sight glass via pipelines respectively; the lifting device is fixed on the oil storage tank.

[0006] Furthermore, the interlayer water removal device includes a retractable hose and a short pipe; the short pipe is installed inside the water cutting line pipe; one end of the short pipe is connected to the oil and water inlet of the water cutter, and the other end is connected to the lifting device.

[0007] Furthermore, the lifting device includes a pulley, a rope, and a handwheel; the pulley is fixed to the top of the oil storage tank, the handwheel is fixed to the bottom of the oil storage tank, one end of the rope is connected to the other end of the retractable hose, and the other end of the rope passes around the pulley and the handwheel to realize the vertical movement of the retractable hose inside the oil storage tank.

[0008] Furthermore, a third valve and a fourth valve are sequentially installed on the pipeline connecting the water-cutting line pipe to the oil-water inlet of the water cutter.

[0009] Furthermore, one end of the short pipe is connected to the oil-water inlet of the water cutter and the water cut sight glass via parallel pipelines; the parallel pipelines include a first pipeline and a second pipeline; one end of the short pipe is connected to the pipeline between the third valve and the fourth valve via the second pipeline; and one end of the short pipe is connected to the water cut sight glass via the first pipeline.

[0010] Furthermore, a first valve is installed on the pipeline connecting the short pipe and the parallel pipeline; a second valve is installed on the pipeline connecting the first pipeline and the water-cutting sight glass.

[0011] Furthermore, a fifth valve is installed at the connection point between the second pipeline and the third and fourth valves.

[0012] The present invention also discloses an oil storage tank comprising the above-described water cutter for removing interlayer water.

[0013] The present invention also discloses a method for removing interlayer water from the above-mentioned oil storage tank, comprising the following steps: if water is at the bottom of the oil storage tank, the pipeline of the interlayer water removal device is closed, the water cutting line is opened, and the water in the oil storage tank is removed through the water cutting line and the water cutter. If water in the oil storage tank forms a water gap between light and heavy oil, the water cut-off line is closed, the water gap removal device is opened, and the position of the water gap is observed through the water cut-off sight glass. Then, the water gap removal device is controlled by the lifting device to remove the water gap in the oil storage tank.

[0014] Furthermore, the interlayer water removal device includes a retractable hose and a short pipe; the lifting device includes a pulley, a rope, and a handwheel; a third valve and a fourth valve are sequentially installed on the pipeline connecting the water-cutting line pipe to the oil-water inlet of the water cutter; one end of the short pipe is connected to the oil-water inlet of the water cutter and the water-cutting sight glass respectively through parallel pipelines; the parallel pipelines include a first pipeline and a second pipeline; a first valve is installed on the pipeline connecting the short pipe and the parallel pipelines; a second valve is installed on the pipeline connecting the first pipeline and the water-cutting sight glass; a fifth valve is installed at the pipeline connection between the second pipeline and the third and fourth valves; Specifically, the steps include: if water is at the bottom of the oil storage tank, close the first valve, open the third and fourth valves, and remove the water from the oil storage tank through the water cut-off line and water cutter. If water in the oil storage tank forms a water gap between light and heavy oil, close the third and fifth valves, open the first and second valves, and control the handwheel to move the rope around the pulley to raise or lower the retractable hose in the oil storage tank. Check for open water flow through the water-cutting sight glass. If open water is flowing, stop turning the handwheel and lock it. Then close the second valve and open the fourth valve to remove the water gap in the oil storage tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a water cutter for removing interlayer water. By installing an interlayer water removal device inside the water cutting line pipe and controlling the position of the interlayer water removal device through a lifting device, it is possible to remove interlayer water that separates oil and water at different locations inside the oil storage tank. At the same time, it can be freely switched with the water cutting line pipe to simultaneously remove the water at the bottom of the tank and the interlayer water between heavy oil and light oil. This solves the technical problem that existing water cutters cannot simultaneously remove the interlayer water between heavy oil and light oil, and can remove interlayer water from the oil in the tank, avoiding fluctuations or production accidents caused by water in the oil in downstream equipment.

[0016] Furthermore, by using a retractable hose and a short pipe to form a water removal device, and pulleys, ropes, and handwheels to form a lifting device, the position of the retractable hose in the oil storage tank can be easily fixed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lifting device of the present invention; Figure 2 This is a schematic diagram of the structure of the water cutter for removing interlayer water according to the present invention; Wherein: 1-Pulley; 2-Rope; 3-Extendable hose; 4-Handwheel; 5-Water cutter; 6-Short pipe; 7-Water cutter line pipe; 8-Third valve; 9-Fourth valve; 10-First valve; 11-Second valve; 12-Fifth valve; 13-First pipeline; 14-Second pipeline; 15-Water cutter sight glass. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] The first aspect of this invention discloses a water cutter for removing intercalated water, including an intercalated water removal device, a lifting device, a water cutter 5, a water cutting sight glass 15, and a water cutting line pipe 7. By setting the intercalated water removal device inside the water cutting line pipe 7 and connecting the intercalated water removal device to the lifting device fixed on the oil storage tank, the position of the intercalated water removal device inside the oil storage tank can be controlled by adjusting the lifting device. By raising or lowering the device inside the oil storage tank, the intercalated water in the oil at any position inside the oil storage tank can be removed.

[0021] A second aspect of the present invention discloses an oil storage tank comprising the aforementioned water cutter for removing interlayer water.

[0022] A third aspect of the present invention discloses a method for removing interlayer water from the aforementioned oil storage tank, comprising the following steps: If the water is at the bottom of the oil storage tank, shut off the pipeline of the interlayer water removal device and open the water removal line 7. The water in the oil storage tank is removed through the water removal line 7 and the water cutter 5. If water in the oil storage tank forms a water gap between light and heavy oil, then the water cut-off line 7 is closed, the water gap removal device is opened, and the position of the water gap is observed through the water cut-off sight glass 15. Then, the water gap removal device is controlled by the lifting device to remove the water gap in the oil storage tank.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings: like Figure 1 and Figure 2As shown, the water cutter disclosed in this invention for removing interlayer water includes a pulley 1, a rope 2, a retractable hose 3, a handwheel 4, a water cutter 5, a short pipe 6, a water cutting line pipe 7, and a water cutting sight glass 15; the pulley 1 and the handwheel 4 are respectively fixed to the upper part and the bottom of the oil storage tank; one end of the rope 2 is connected to the other end of the retractable hose 3, and the other end passes around the pulley 1 and the handwheel 4; the handwheel 4 is used to control the retractable hose 3 to move up and down inside the oil storage tank; wherein the handwheel 4 has a locking function; The third valve 8 and the fourth valve 9 are sequentially installed on the pipeline connecting the water-cutting line pipe 7 and the oil-water inlet of the water-cutter 5. The water-cutting line pipe 7 is located at the bottom of the oil storage tank and is connected to the oil and water inlet of the water cutter 5 through a pipeline. The short pipe 6 is located inside the water-cutting line pipe 7. One end of the short pipe 6 is connected to the water-cutting sight glass 15 through the first pipeline 13 and is connected to the pipeline between the third valve 8 and the fourth valve 9 through the second pipeline 14. A first valve 10 is installed on the pipeline connecting the short pipe 6 and the parallel pipeline; a second valve 11 is installed on the pipeline connecting the first pipeline 13 and the water-cutting sight glass 15; a fifth valve 12 is installed at the pipeline connection between the second pipeline 14 and the third valve 8 and the fourth valve 9.

[0024] The method of using the water-cutting device for removing interlayer water according to the present invention is as follows: In an oil storage tank, if water is at the bottom, close the first valve 10 and open the third valve 8 and the fourth valve 9. Water is removed from the oil storage tank via the water-cutting pipe 7 and the water-cutting device 5. If the density of the oil at the bottom of the tank is greater than that of water, causing water to form a layer between the light and heavy oil layers, close the third valve 8 and the fifth valve 12 and open the first valve 10 and the second valve 11. By controlling the handwheel 4, the rope 2 is wound around the pulley 1, raising or lowering the retractable hose 3 within the oil storage tank. Check for any visible water flow through the water-cutting sight glass 15. If visible water is present, stop rotating the handwheel 4 and lock it. Then close the second valve 11 and open the fourth valve 9 to remove the layered water from the oil storage tank.

[0025] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A method for removing interlayer water from an oil storage tank, characterized in that, A water cutter for removing interlayer water is used. The water cutter includes an interlayer water removal device, a lifting device, a water cutter (5), a water cut sight glass (15), and a water cut line pipe (7). The water cut line pipe (7) is located at the bottom of the oil storage tank and is connected to the oil-water inlet of the water cutter (5) through a pipeline. The interlayer water removal device is located inside the water cut line pipe (7). One end of the interlayer water removal device is connected to the lifting device, and the other end is connected to the oil-water inlet of the water cutter (5) and the water cut sight glass (15) through a pipeline. The lifting device is fixed on the oil storage tank. The interlayer water removal device includes a retractable hose (3) and a short pipe (6); the short pipe (6) is installed inside the water-cutting line pipe (7); one end of the short pipe (6) is connected to the oil-water inlet of the water cutter (5), and the other end is connected to the lifting device; the lifting device includes a pulley (1), a rope (2), and a handwheel (4); the pulley (1) is fixed to the top of the oil storage tank, the handwheel (4) is fixed to the bottom of the oil storage tank, one end of the rope (2) is connected to the other end of the retractable hose (3), and the other end of the rope (2) passes around the pulley (1) and the handwheel (4) to realize the up and down movement of the retractable hose (3) inside the oil storage tank; a third valve (8) and a fourth valve (9) are sequentially installed on the pipeline connecting the water-cutting line pipe (7) to the oil-water inlet of the water cutter (5). One end of the short pipe (6) is connected to the oil-water inlet of the water cutter (5) and the water cut sight glass (15) through parallel pipelines; the parallel pipelines include a first pipeline (13) and a second pipeline (14); one end of the short pipe (6) is connected to the pipeline between the third valve (8) and the fourth valve (9) through the second pipeline (14); one end of the short pipe (6) is connected to the water cut sight glass (15) through the first pipeline (13); a first valve (10) is provided on the pipeline connected to the parallel pipeline of the short pipe (6); a second valve (11) is provided on the pipeline connected to the first pipeline (13) and the water cut sight glass (15); a fifth valve (12) is provided at the pipeline connection between the second pipeline (14) and the third valve (8) and the fourth valve (9); The method includes the following steps: If the water is at the bottom of the oil storage tank, close the first valve (10), open the third valve (8) and the fourth valve (9), and remove the water in the oil storage tank through the water cut-off pipe (7) and the water cutter (5); If water in the oil storage tank forms a water gap between light and heavy oil, close the third valve (8) and the fifth valve (12), open the first valve (10) and the second valve (11), control the handwheel (4), control the rope (2) to wind around the pulley (1), raise or lower the retractable hose (3) in the oil storage tank, check whether there is any water flowing through the water cut sight glass (15), if there is any water flowing through, stop the handwheel (4) and lock the handwheel (4), then close the second valve (11) and open the fourth valve (9) to remove the water gap in the oil storage tank.

2. An oil storage tank comprising a water cutter used in the method for removing interlayer water in an oil storage tank as described in claim 1.

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