Cyclone wax removal device

Abstract

The utility model discloses a rotational flow wax removal device which comprises a fixed connecting body and a rotational flow wax removal main body arranged in the fixed connecting body, the rotational flow wax removal main body comprises a central pipe and a rotational flow plate, and the rotational flow plate is spirally wound on the outer wall of the central pipe; at least one group of top surface flushing holes and back surface flushing holes are formed in the outer wall of the central pipe in the single screw pitch of the rotational flow plate, the top surface flushing holes are communicated with the space above the rotational flow plate in the single screw pitch of the rotational flow plate, and the back surface flushing holes are communicated with the space below the rotational flow plate; the top of the central pipe is communicated with the outside through a hot liquid injection pipeline, and the bottom is closed. The device can effectively solve the problems of adhesion and freezing of the valve clack of the breather valve caused by wax precipitation of oil steam and freezing in winter. The device can be conveniently cleaned. The device does not need to be disassembled, and the maintenance cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield gas processing equipment, in particular to a cyclone wax removal device. Background Art

[0002] Part of the crude oil produced underground is transported to the joint station by tank trucks for oil, gas and water treatment. During the operation, the tank truck unloads the crude oil into a special unloading tank, and then pumps it into a sedimentation tank for separation. To prevent oil and gas from overflowing, the tank truck adopts a closed unloading method. The hose of the unloading tank is connected to the bottom pipeline of the tank truck, and then the valve is opened before unloading. The unloading tank is generally 60m 3 Small oil tanks are about 100 square meters in size. Mechanical breathing valves are installed on the top of the tanks to exhale oil vapor during the oil unloading process. After the oil unloading is completed, the breathing valves are closed to isolate the oil in the tank from the outside air. The extracted crude oil contains various impurities, some of which have a high wax content. In order to prevent condensation, it needs to be heated in winter. The bottom of the oil unloading tank is generally equipped with a heating coil to heat the crude oil in the tank. The temperature in the tank is generally maintained at around 60°C.

[0003] Due to the high wax content in crude oil, a large amount of oil vapor is generated during unloading. This part of the oil vapor is directly exhaled along the breather valve through the pipeline. A large amount of wax and other impurities gather on the valve disc of the breather valve to condense and stick, making the valve disc difficult to open. Since the breather valve is far away from the oil tank, the temperature inside the tank cannot increase the temperature of the breather valve. The oil vapor has condensed when it reaches the breather valve along the pipeline. Especially in winter, the valve disc not only has wax adhesion, but also has problems such as water vapor freezing. There is no oil and gas processing facility at the front end of the currently used breather valve, and the breather valve is difficult to open, resulting in a slowdown in unloading and the risk of the oil tank being deflated during oil pumping, which poses a hidden danger to the safe operation of the oil tank.

[0004] Publication No.: CN112156565A, discloses a mist catching device of a slug flow collector, which passes the treated gas into a spiral flow channel. Under the action of centrifugal force, the liquid phase will adhere to the side wall of the spiral flow channel, and under the action of gravity, flow to the bottom of the spiral flow channel, and finally flow back to the separator, thereby efficiently achieving the effect of gas-liquid separation.

[0005] The device introduced in this patent is a demisting device used when slug flow occurs in the pipeline. It is a volute-shaped structure. Because the wax in the steam of the tanker truck will condense, this patent does not have a wax removal measure and is not suitable for wax removal by a mechanical breathing valve on the top of the tank.

[0006] Publication No.: CN201959657U discloses a cyclone mist eliminator, which includes a tank body. An air outlet pipe is arranged at the top of the tank body, an input pipe is arranged on the side wall, and a liquid outlet pipe is arranged at the bottom. Among them, the input pipe is tangent to the side wall of the tank body, and the air outlet pipe extends from the top of the tank body into the center of the tank body, and the bottom end of the air outlet pipe is open as the inlet of the air outlet pipe.

[0007] This patent describes a special demisting device composed of a tank body structure. There are special pipelines for liquid inlet, gas outlet, and liquid droplet fallback, which is a relatively complex device.

[0008] Publication No.: CN101791505B discloses a baffle plate type cyclone mist eliminator, which utilizes the inertial separation principle of baffle plates and the rotational centrifugal separation principle. The mist eliminator effectively utilizes the guiding principle of mist elimination vanes, achieving the effect of forcing the airflow to rotate while realizing the effect of a gas-liquid separator.

[0009] This patent describes a demisting device composed of double-layer baffle plates, which achieves gas-liquid separation by disturbing the airflow through the baffle plates. It has many baffle plate blades and is prone to wax blockage and difficult to clean when applied to oil tank trucks.

[0010] In summary, the technical solutions, the technical problems to be solved, and the beneficial effects of the above disclosed technologies are all different from those of the present utility model. For more technical features, technical problems to be solved, and beneficial effects of the present utility model, there is no technical inspiration in the above disclosed technical documents. Content of the Utility Model

[0011] Aiming at the above-mentioned defects existing in the prior art, the purpose of the present utility model is to provide a swirl dewaxing device that can separate steam from liquid droplets and can clean the condensed wax.

[0012] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0013] A swirl dewaxing device includes a fixed connection body and also includes a swirl dewaxing main body arranged in the fixed connection body; the swirl dewaxing main body includes a central pipe and a swirl plate, and the swirl plate is spirally wound around the outer wall of the central pipe; at least one group of top surface flushing holes and back surface flushing holes are arranged on the outer wall of the central pipe within a single pitch of the swirl plate. Within a single pitch of the swirl plate, the top surface flushing holes communicate with the space above the swirl plate, and the back surface flushing holes communicate with the space below the swirl plate; the top of the central pipe is connected to the outside through a hot liquid injection pipeline, and the bottom is closed.

[0014] Further, the hot liquid injection pipeline includes a flushing pipe and an outer diversion pipe;

[0015] Specifically, the flushing pipe is connected to the top of the central pipe. The flushing pipe is an elbow, and a threaded connection port is provided at the port of the flushing pipe.

[0016] Specifically, the threaded connection port of the flushing pipe is connected to an outer diversion pipe. The outer diversion pipe passes through the fixed connection body to the outside, and a screw thread connection head is provided at the outer port of the outer diversion pipe.

[0017] Further, a sealing ring is provided between the outer diversion pipe and the fixed connection body.

[0018] Further, the central pipe, the swirl plate, the flushing pipe, and the fixed connection body are connected in a non-detachable manner; an anti-wax coating is provided on the outer surface of the swirl wax removal main body.

[0019] Further, a bottom cleaning hole is provided at the bottom of the central pipe.

[0020] Further, the upper end of the fixed connection body is a top flange, and the lower end is a bottom flange. Connecting screw holes are provided on both the top flange and the bottom flange.

[0021] Further, the spiral angle of the swirl plate is 30 - 60°.

[0022] Further, pressure relief drip holes are formed on the surface of the swirl plate, and at least two circumferentially evenly distributed pressure relief drip holes are provided within a single pitch of the swirl plate.

[0023] Further, the top surface flushing holes are tangent to the upper plate surface of the swirl plate, and the back surface flushing holes are tangent to the lower plate surface of the swirl plate.

[0024] Further, all the top surface flushing holes are equidistantly distributed on the first spiral line, and all the back surface flushing holes are equidistantly distributed on the second spiral line. The first spiral line, the second spiral line, and the connection line between the swirl plate and the central pipe have the same shape.

[0025] The utility model has the following beneficial effects compared with the prior art:

[0026] 1. This device can effectively solve the problems of the valve flap of the breathing valve being adhered and frozen due to wax formation of oil vapor and icing in winter. When the tank truck unloads the vehicle in a closed manner, high-wax oil vapor is generated in the tank. The gas rises along the connecting pipe at the upper part of the storage oil tank under the action of pressure. When entering the swirl body, a spiral upward force is generated. During this process, the droplets in the oil vapor continuously collide with the swirl plate and gather into liquid droplets, and then return to the oil tank along the drip holes and the swirl plate; the rising gas pushes open the valve flap of the breathing valve under the action of pressure and exhales out of the tank, completing the process of gas-liquid separation. After the oil unloading is completed, the valve flap automatically closes.

[0027] 2. The device can be easily cleaned. After being used for a period of time, to remove the impurities on the surface of the swirl plate, the external flushing pipeline can be opened, and the water flow can flush the plate surface along the top surface flushing holes and the back surface flushing holes of the central pipe.

[0028] 3. The device does not need to be disassembled and has a low maintenance cost. During use, only connect the device between the breather valve and the pipeline flange, connect the flushing pipe section to the hot water pipeline, and install valves for control. The non-waxing coating inside can effectively prevent impurities from accumulating on the swirl plate surface, and the maintenance is simple and reliable. Description of the Drawings

[0029] Figure 1 are the front view (a) and sectional view (b) of a swirl wax removal device of the present utility model;

[0030] Figure 2 is the three-dimensional structure schematic diagram of a swirl wax removal device of the present utility model;

[0031] Figure 3 are the front view (c) and sectional view (d) of the swirl wax removal main body in the present utility model;

[0032] Figure 4 is the present utility model Figure 3 the enlarged schematic diagram at position Ⅺ;

[0033] Figure 5 is the present utility model Figure 3 the enlarged schematic diagram at position D.

[0034] In the figure: 1 central pipe; 2 pressure relief drip holes; 3 top surface flushing holes; 4 swirl plate; 5 back surface flushing holes; 6 flushing pipe; 7 flushing pipe bottom cleaning holes; 8 threaded connection ports; 9 top flange; 10 bottom flange; 11 connection screw holes; 12 threaded connection heads; 13 fixed connection body; 14 pipe section cavity. Detailed Embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0036] Embodiment 1:

[0037] Please refer to Figures 1 to 5 , a swirl wax removal device provided by the present utility model includes a swirl wax removal main body and a fixed connection body 13, and the swirl wax removal main body is arranged in the fixed connection body 13.

[0038] The swirl wax removal main body includes a central tube 1 and a swirl plate 4. The bottom of the central tube 1 is closed and the top is open. The swirl plate 4 is spirally wound around the outer wall of the central tube 1. Top surface flushing holes 3 and back surface flushing holes 5 are provided on the outer wall of the central tube 1. Corresponding to at least one group of top surface flushing holes 3 and back surface flushing holes 5 within a single pitch of the swirl plate 4. Within a single pitch of the swirl plate 4, the top surface flushing holes 3 communicate with the space above the swirl plate 4, and the back surface flushing holes 5 communicate with the space below the swirl plate 4. A flushing tube 6 is connected to the top of the central tube 1. The flushing tube 6 is an elbow. A threaded connection port 8 is provided at the port of the flushing tube 6. An outer diversion tube is connected to the threaded connection port 8 of the flushing tube 6. The outer diversion tube passes through the fixed connection body 13 to the outside. A sealing ring is provided between the outer diversion tube and the fixed connection body 13. A bottom cleaning hole 7 is provided at the bottom of the central tube 1.

[0039] Among them, the fixed connection body 13 is mainly used to connect between the breathing valve and the pipe section. The upper end of the fixed connection body 13 is a top flange 9 and the lower end is a bottom flange 10. Connection screw holes 11 are provided on both the top flange 9 and the bottom flange 10.

[0040] Among them, the swirl plate 4 is arranged inside the fixed connection body 13 for gas-liquid separation, and is in a spiral rising structure around the central tube 1. The spiral rising angle is controlled at 30 - 60°. A pressure relief drip hole 2 is opened in the middle of the plate surface of the swirl plate 4. At least two circumferentially evenly distributed pressure relief drip holes 2 are provided within a single pitch. The air flow can be directly discharged outside along the pressure relief drip hole 2. At the same time, when the liquid droplets flow downward along the swirl plate 4, they can be directly discharged downward along the pressure relief drip hole 2.

[0041] Among them, the top surface flushing holes 3 and the back surface flushing holes 5 are used to flush the plate surface of the swirl plate 4. Preferably, the top surface flushing holes 3 are tangent to the upper plate surface of the swirl plate 4, and the back surface flushing holes 5 are tangent to the lower plate surface of the swirl plate 4 to make the flushing effect better.

[0042] Among them, the bottom cleaning hole 7 can flush the inside of the pipe section. For example, if an elbow pipe section is connected below the fixed connection body 13, the bottom cleaning hole 7 can flush the inner wall of the elbow pipe section.

[0043] Among them, a threaded connection head 12 is provided at the outer port of the outer diversion tube. The threaded connection head 12 is connected to the flushing equipment to introduce the flushing liquid into the central tube 1.

[0044] Among them, all the top surface flushing holes 3 are equally spaced on the first spiral line, and all the back surface flushing holes 5 are equally spaced on the second spiral line. The shapes of the first spiral line, the second spiral line, and the connection line between the swirl plate 4 and the central tube 1 are the same.

[0045] Preferably, the central tube 1, swirl plate 4, flushing tube 6, and fixed connector 13 are connected in a non-detachable manner, such as welding; in this case, when assembling the equipment, it is only necessary to insert the outer guide tube into the fixed connector 13 and connect it to the threaded connection port 8 of the flushing tube 6.

[0046] Preferably, the cyclone dewaxing body and the fixed connector 13 are made of metal, and are provided with an anti-wax coating on the surface, such as graphene and epoxy phenolic, according to the method described in CN113882816A, an anti-wax coated oil pipe and its manufacturing method.

[0047] Preferably, the sealing ring between the outer flow guiding tube and the fixed connecting body 13 is a rubber ring.

[0048] Embodiment 2:

[0049] Based on Example 1, this example provides a specific method for using a cyclone dewaxing device, which specifically includes the following steps:

[0050] S1. Connect a cyclone wax removal device between the breathing valve and the connecting pipe on the upper part of the oil storage tank.

[0051] S2. When the tank truck is unloaded in a closed manner, high-wax oil vapor is generated in the tank. Under the action of pressure, the gas rises along the connecting pipe on the upper part of the oil storage tank, and when it enters the cyclone wax removal body, it is affected by the cyclone plate and starts spiral motion;

[0052] During this process, the droplets in the oil vapor continuously collide with the swirl plate 4 and gather into wax droplets, and then return to the oil tank downward along the drip hole 2 and the swirl plate 4. The steam passes through the swirl plate 4 and the pipe section cavity 14. The rising gas pushes open the valve flap of the breathing valve under the action of pressure and exhales out of the tank, completing the gas-liquid separation process. After the oil unloading is completed, the valve flap automatically closes.

[0053] S3, connect the flushing pipe section 6 to the hot water pipeline, and install a valve for control. After a period of use, in order to remove impurities on the surface of the swirl plate 4, the external flushing pipeline can be opened, and the water flow can clean the plate surface along the upper and lower cleaning holes 3, 5 of the swirl plate 4. This device can effectively solve the problem of the valve disc of the breathing valve sticking and freezing caused by waxing of oil vapor and ice formation in winter. It can be easily cleaned without disassembly, and the maintenance cost is low.

[0054] The internal anti-wax coating can effectively prevent the accumulation of impurities on the plate surface of the swirl plate 4, and the maintenance is simple and reliable.

[0055] All components and connection methods of components not discussed in this application belong to the known technologies in this technical field and can be directly applied without further explanation.

[0056] In the present utility model, the term "a plurality of" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed" and the like shall be understood in a broad sense. For example, "connected" may be a fixed connection, a detachable connection or an integral connection; "joined" may be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0057] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0058] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cyclone wax removal device, comprising a fixed connection body, characterized in that: It also includes a cyclone wax removal body arranged in the fixed connection body; The cyclone wax removal body comprises a central tube and a cyclone plate, wherein the cyclone plate is spirally wound on the outer wall of the central tube; The outer wall of the central tube is provided with at least one set of top flushing holes and back flushing holes within a single pitch of the swirl plate. Within a single pitch of the swirl plate, the top flushing holes are connected to the space above the swirl plate, and the back flushing holes are connected to the space below the swirl plate. The top of the central tube is connected to the outside through a hot liquid injection pipeline, and the bottom is closed.

2. A cyclone dewaxing device according to claim 1, characterized in that: The hot liquid injection pipeline includes a flushing pipe and an external diversion pipe; The flushing pipe is connected to the top of the central pipe, the flushing pipe is an elbow, and the port of the flushing pipe is provided with a threaded connection port; The threaded connection port of the flushing pipe is connected to an external flow guide pipe, and the external flow guide pipe passes through the fixed connection body to the outside, and the outer port of the external flow guide pipe is provided with a threaded connector.

3. A cyclone dewaxing device according to claim 2, characterized in that: A sealing ring is arranged between the outer flow guiding tube and the fixed connecting body.

4. A cyclone dewaxing device according to claim 2, characterized in that: The central tube, the swirl plate, the flushing tube and the fixed connector are connected in a non-detachable manner; and an anti-wax coating is provided on the surface of the swirl wax removal body.

5. The cyclone dewaxing device according to claim 1, characterized in that: A bottom cleaning hole is arranged at the bottom of the central tube.

6. A cyclone dewaxing device according to claim 1, characterized in that: The upper end of the fixed connection body is a top flange, and the lower end is a bottom flange. Both the top flange and the bottom flange are provided with connecting screw holes.

7. A cyclone dewaxing device according to claim 1, characterized in that: The spiral angle of the swirl plate is 30-60°.

8. The cyclone dewaxing device according to claim 1, characterized in that: The swirl plate surface is provided with pressure relief drip holes, and at least two circumferentially evenly distributed pressure relief drip holes are arranged within a single pitch of the swirl plate.

9. A cyclone dewaxing device according to claim 1, characterized in that: The top flushing hole is tangent to the upper surface of the swirl plate, and the back flushing hole is tangent to the lower surface of the swirl plate.

10. A cyclone dewaxing device according to claim 9, characterized in that: All top flushing holes are evenly spaced on the first spiral line, and all back flushing holes are evenly spaced on the second spiral line. The first spiral line, the second spiral line, and the connection line between the swirl plate and the central tube have the same shape.

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