Pipeline heating device capable of conveniently removing scale

Abstract

The utility model relates to the technical field of wellhead heating and descaling, in particular to a pipeline heating device capable of conveniently removing scales, which comprises a cyclone separator, a scaling component, a liquid blocking mechanism, a processing device and a snakelike scaling pipe. The cyclone separator is reasonable and compact in structure, oil-gas separation of produced liquid can be achieved in the cyclone separator, the situation that the liquid is wrapped and taken away by gas is effectively avoided, the separated liquid phase flows into the lower end of the scaling pipe from the water phase outlet, and due to the fact that the scaling pipe is snake-shaped, oil-gas separation can be achieved. The staying time and the heating time can be prolonged in the flowing process of the separated liquid phase in the scaling pipe, so that the cleaning time of the scaling assembly on scaling ions in the liquid phase can be prolonged, the cleaning efficiency of the scaling ions in the liquid phase is higher, the functions of heating, viscosity reduction and descaling are integrated, and the service life of the scaling assembly is prolonged. The problems of low conveying efficiency, large equipment loss and the like caused by oil-gas mixing, low temperature, scaling and the like of the pipeline are solved, and the purposes of improving the conveying efficiency of the pipeline, prolonging the service life of equipment and reducing the maintenance cost are achieved.

Description

Technical Field

[0001] This utility model relates to the field of wellhead heating and descaling technology, and is a convenient pipe heating device for descaling. Background Technology

[0002] In the petroleum industry, stable production from a single well is crucial to the overall output and economic benefits of an oilfield. In cold regions or during periods of low winter temperatures, the ambient temperature around the wellhead is very low. As the produced fluid flows through the pipeline, heat is continuously lost, easily leading to freezing and subsequent pipeline blockage. Furthermore, with the large-scale extraction of crude oil, most oilfields employ water injection or steam injection methods, making oil pipelines increasingly prone to scaling and fouling. This not only poses a serious threat to the normal gathering and transportation of the pipeline but also significantly impacts connected heat exchange equipment. Therefore, heating the produced fluid at the wellhead can not only reduce viscosity and pressure but also remove some scale-forming ions from the produced fluid, ensuring the normal operation of the subsequent oilfield production process chain.

[0003] Chinese patent document CN219220372U discloses a downhole scale-forming ion-induced reduction preprocessor, which includes a central tube, an outer tube connected to the central tube, and several scale-forming plates fixed to the central tube; the scale-forming plates are hollow hemispherical, with small holes evenly distributed on their surface, and a through hole in the center of the scale-forming plate, through which the central tube passes and is fixed to the scale-forming plate.

[0004] Chinese patent document CN216077069U discloses a rapid scale-aggregating and settling device for pipelines at gathering and transportation stations, including a base and an oil tank. A support column is fixed to the top surface of the base, and a control box is fixed to the top surface of the support column. A control panel is fixed to the front of the control box. An oil tank top plate is fixedly connected to the top of the oil tank, and an oil inlet is connected to the top of the oil tank top plate. The oil inlet passes through the top of the control box.

[0005] Traditional heating methods suffer from drawbacks such as significant heat loss, complex installation, and large space requirements, making it difficult to ensure the long-term stable operation of oilfield production systems. Summary of the Invention

[0006] This utility model provides a convenient scale removal pipeline heating device, which overcomes the shortcomings of the above-mentioned prior art. It can effectively solve the problems of short heating time of produced fluid and easy formation of scale layer on the equipment surface after heating of produced fluid in existing single-well heating devices with large gas content of produced fluid, which affect the heating efficiency.

[0007] The technical solution of this utility model is achieved through the following measures: a convenient pipe heating device for descaling includes a cyclone separator, a scaling component, a liquid blocking mechanism, a treatment device, and a serpentine scaling tube. The cyclone separator has a closed separation chamber. Gas phase outlet, oil phase outlet, and water phase outlet are distributed at intervals from top to bottom on the outside of the cyclone separator. The water phase outlet is fixedly connected to the lower end of the scaling tube. A connecting pipe is fixedly connected between the upper part of the scaling tube and the oil phase outlet. A scaling component for heating the liquid in the scaling tube and removing scale-forming ions from the liquid in the scaling tube is detachably installed inside the scaling tube. A first connecting pipeline is fixedly connected between the upper outer side of the scaling tube and the liquid inlet of the treatment device. A second connecting pipeline is fixedly connected between the gas phase outlet and the air inlet of the treatment device. A connecting pipe is fixedly connected between the upper part of the scaling tube and the oil phase outlet. A liquid blocking mechanism is provided on the inner side of the upper part of the cyclone separator corresponding to the gas phase outlet position. An inlet communicating with the separation chamber is provided on the outer side of the cyclone separator.

[0008] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0009] The aforementioned liquid-blocking mechanism may include a horizontal tube, a lever, a float, and a switch valve core. A fixed tube is fixedly connected to the inner side of the upper part of the cyclone separator corresponding to the gas phase outlet position. The lower end of the fixed tube is fixedly connected to the right end of the horizontally arranged horizontal tube, and the left end of the horizontal tube is fixedly connected to the lower end of the vertically arranged vertical tube. A lever is hinged to the upper part of the horizontal tube. A float is installed at the right end of the lever, and a switch valve core is installed at the left end of the lever. The switch valve core can close the upper end of the vertical tube after swinging downward with the left end of the lever.

[0010] A valve seat is fixed at the upper end of the aforementioned vertical pipe. The upper end of the valve seat has a tapered through hole that is larger at the top and smaller at the bottom. The valve core is spherical.

[0011] The outer side of the cyclone separator at the corresponding inlet position is fixedly connected to an inlet pipe. The left part of the inlet pipe is inclined upward relative to the right part, and the inner wall of the front part of the inlet pipe is tangent to the inner wall of the front part of the cyclone separator.

[0012] The aforementioned scaling pipe may include a first heating pipe, a second heating pipe, and a third heating pipe arranged parallel to each other from bottom to top. The right side of the third heating pipe is inclined upward relative to the left side. The left end of the first heating pipe is fixedly connected to the water phase outlet. A lower connecting pipe is fixedly connected between the upper right side of the first heating pipe and the lower right side of the second heating pipe. An upper connecting pipe is fixedly connected between the upper left side of the second heating pipe and the lower left side of the first heating pipe. A connecting pipe is fixedly connected between the upper right side of the third heating pipe and the oil phase inlet. A first connecting pipe is fixedly connected between the lower right side of the third heating pipe and the treatment device. Between the liquid inlets, openings are provided at the right ends of the first heating tube, the second heating tube, and the third heating tube. The scaling assembly includes a first scaling device, a second scaling device, and a third scaling device. The left part of the first scaling device is located inside the first heating tube, and the right end of the first scaling device is detachably and fixedly installed together with the right end of the first heating tube. The left part of the second scaling device is located inside the second heating tube, and the right end of the second scaling device is detachably and fixedly installed together with the right end of the second heating tube. The left part of the third scaling device is located inside the third heating tube, and the right end of the third scaling device is detachably and fixedly installed together with the right end of the third heating tube.

[0013] As a preferred embodiment, the first scale collector may include fins and a heating rod. The heating rod is fitted inside the first heating tube. A connecting plate is fixedly installed on the right end of the heating rod. The outside of the connecting plate is detachably and fixedly installed together with the right end of the first heating tube. Several fins are fixedly installed at intervals along the length direction on the outside of the heating rod. Several flow holes are distributed at intervals along the circumference on the side of the fins. The second and third scale collectors have the same structure as the first scale collector.

[0014] As another preferred embodiment, the first scaler may include a sleeve, fins, and a heating rod. The sleeve is fitted inside the first heating tube, and a connecting plate is fixedly installed at the right end of the sleeve. The outside of the connecting plate is detachably and fixedly installed together with the right end of the first heating tube. The heating rod is fitted inside the sleeve, and a number of fins are fixedly installed at intervals along the length of the outer side of the sleeve. A number of flow holes are distributed at intervals along the circumference on the side of the fins. The second and third scalers have the same structure as the first scaler.

[0015] A first control valve may be installed on the first connecting pipeline. A first metering instrument is installed on the first connecting pipeline corresponding to the position between the first control valve and the treatment device. A moisture content meter is installed on the first connecting pipeline corresponding to the position between the first metering instrument and the first control valve. A second control valve is installed on the second connecting pipeline. A second metering instrument is installed on the second connecting pipeline corresponding to the position between the second control valve and the treatment device.

[0016] This utility model has a reasonable and compact structure. In use, the wellhead outlet pipeline is connected to the inlet, and the produced fluid enters the hydrocyclone separator from the inlet. Oil and gas separation can be achieved in the hydrocyclone separator, effectively avoiding the situation where the liquid is carried away by the gas and avoiding the interference of gas on the scale-forming effect (the gas does not contain scale-forming ions). The separated liquid phase flows from the water phase outlet into the lower end of the scale-forming pipe. Since the scale-forming pipe is serpentine, the residence time and heating time of the separated liquid phase can be increased during the flow in the scale-forming pipe. This can prolong the removal time of scale-forming ions in the liquid phase by the scale-forming component, making the removal efficiency of scale-forming ions in the liquid phase higher. It integrates heating, viscosity reduction and descaling functions, and solves the problems of low transportation efficiency and high equipment wear caused by oil and gas mixing, low temperature and scale in pipelines. It achieves the purpose of improving pipeline transportation efficiency, extending equipment service life and reducing maintenance costs. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of this utility model.

[0018] Appendix Figure 2 These are schematic diagrams of the main cross-sectional structure of embodiments one to six of this utility model.

[0019] Appendix Figure 3 This is a schematic diagram of the cross-sectional structure of the first heating tube in Embodiment Six of this utility model.

[0020] Appendix Figure 4 This is a schematic diagram of the cross-sectional structure of the first heating tube in Embodiment 7 of this utility model.

[0021] The codes in the attached diagram are as follows: 1 is a cyclone separator, 2 is a separation chamber, 3 is the first connecting pipeline, 4 is the second connecting pipeline, 5 is a processing device, 6 is a connecting pipe, 7 is a horizontal pipe, 8 is a lever, 9 is a float, 10 is a switch valve core, 11 is a fixed pipe, 12 is a vertical pipe, 13 is a valve seat, 14 is an inlet pipe, 15 is the first heating pipe, 16 is the second heating pipe, 17 is the third heating pipe, 18 is the lower connecting pipe, 19 is the upper connecting pipe, 20 is a fin, 21 is a heating rod, 22 is a connecting plate, 23 is a flow passage, 24 is the second scale collector, 25 is the third scale collector, 26 is a sleeve, 27 is the first control valve, 28 is the first metering instrument, 29 is a moisture content meter, 30 is the second control valve, and 31 is the second metering instrument. Detailed Implementation

[0022] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0023] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0024] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0025] Example 1: As shown in the attached document Figure 1 As shown, the convenient descaling pipeline heating device includes a cyclone separator 1, a scaling component, a liquid blocking mechanism, a treatment device 5, and a serpentine scaling tube. The cyclone separator 1 has a closed separation chamber 2 inside. The outer side of the cyclone separator 1 has gas phase outlet, oil phase outlet, and water phase outlet distributed from top to bottom. The water phase outlet is fixedly connected to the lower end of the scaling tube. The upper part of the scaling tube is fixedly connected to the oil phase outlet by a connecting pipe 6. The scaling component, which is used to heat the liquid in the scaling tube and remove scale-forming ions from the liquid in the scaling tube, is detachably installed inside the scaling tube. The upper outer side of the scaling tube is fixedly connected to the liquid inlet of the treatment device 5 by a first connecting pipe 3. The gas phase outlet is fixedly connected to the air inlet of the treatment device 5 by a second connecting pipe 4. The upper inner side of the cyclone separator 1 corresponding to the gas phase outlet position is provided with a liquid blocking mechanism. The outer side of the cyclone separator 1 is provided with an inlet that communicates with the separation chamber 2.

[0026] The gas phase outlet, oil phase outlet, and water phase outlet are all connected to the separation chamber 2. The inlet is located on the left outer side of the cyclone separator 1, between the oil phase outlet and the water phase outlet. The inlet is located on the opposite side of the water phase outlet. The oil phase outlet and the water phase outlet are located on the right outer side of the cyclone separator 1. The cyclone separator 1 is cylindrical and can be a vertically installed pipe. The inner diameter d1 of the lower part of the cyclone separator 1 can be 3-5 times the inlet diameter, and the height is 1.5-1.8m. It has the advantages of compact design and small equipment size. The cyclone separator 1 is lightweight. The produced liquid enters the separation chamber 2 obliquely downward from the inlet and begins to rotate. After the produced liquid enters the separation chamber 2, due to the different densities of the oil, gas, and water phases, under the action of centrifugal force, gravity, and buoyancy, the less dense gas phase rises along the center of the vortex to the top of the cyclone separator 1. The more dense water phase moves closer to the wall of the cyclone separator 1 and downward under the action of centrifugal force. The less dense oil phase gathers towards the center and moves upward, thereby realizing the three-phase separation of oil, gas, and water.

[0027] The gas phase outlet is at the top of the cyclone separator 1, the oil phase outlet is 20-30mm below the gas phase outlet, and the water phase outlet is 5-20mm below the oil phase outlet. A liquid blocking mechanism is installed at the top of the cyclone separator 1 to prevent the oil phase from entering the gas phase pipeline (second connecting pipeline 4). The separated gas phase enters the second connecting pipeline 4 from the gas phase outlet at the top of the cyclone separator 1, and finally enters the treatment device 5. The separated liquid phase flows into the scaling pipe from the water phase outlet, and then enters the treatment device 5 through the first connecting pipeline 3. The treatment device 5 is a known technology, such as a gas-liquid mixer or a metering instrument. In this way, the separated gas phase and liquid phase enter the treatment device 5 separately for the next stage of treatment.

[0028] In use, the wellhead outlet pipeline is connected to the inlet, and the produced fluid enters the cyclone separator 1 from the inlet. For single wells with a large gas content in the produced fluid, oil and gas can be separated in the cyclone separator 1, effectively avoiding the situation where the liquid is carried away by the gas. The separated gas phase no longer participates in the heating and descaling process, avoiding interference from the gas on the scale-forming effect (the gas does not contain scale-forming ions). The separated liquid phase flows from the water phase outlet to the lower end of the scale-forming pipe. Since the scale-forming pipe is serpentine, the residence time of the separated liquid phase can be increased during the flow in the scale-forming pipe. This can prolong the removal time and heating time of scale-forming ions in the liquid phase by the scale-forming components, making the removal efficiency of scale-forming ions in the liquid phase higher. It integrates heating, viscosity reduction and descaling functions, solving problems such as low transportation efficiency and high equipment wear caused by oil and gas mixing, low temperature and scale in pipelines, and achieving the purpose of improving pipeline transportation efficiency, extending equipment service life and reducing maintenance costs.

[0029] The above-mentioned convenient scale removal pipe heating device can be further optimized and / or improved according to actual needs:

[0030] Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown, the liquid blocking mechanism includes a horizontal tube 7, a lever 8, a float 9, and a switch valve core 10. A fixed tube 11 is fixedly connected to the inner side of the upper part of the cyclone separator 1 corresponding to the gas phase outlet position. The lower end of the fixed tube 11 is fixedly connected to the right end of the horizontally arranged horizontal tube 7, and the left end of the horizontal tube 7 is fixedly connected to the lower end of the vertically arranged vertical tube 12. A lever 8 is hinged to the upper part of the horizontal tube 7. A float 9 is installed at the right end of the lever 8, and a switch valve core 10 is installed at the left end of the lever 8. The switch valve core 10 can close the upper end of the vertical tube 12 after swinging downward with the left end of the lever 8.

[0031] According to requirements, the cyclone separator 1 has a T-shaped cross-section, wider at the top and narrower at the bottom. The cyclone separator 1 can be formed by fixing two mutually perpendicular pipes together. The upper pipe is horizontally positioned, and the lower pipe is vertically positioned. The lower side of the upper pipe is connected to the upper end of the lower pipe. The inner diameter d3 of the upper part of the cyclone separator 1 is 1.5 to 2 times the diameter of the lower part. The length of the upper part of the cyclone separator 1 is 1.5 to 2 times the inner diameter of the upper part. The float 9 is a hollow sphere, and the outer diameter of the float 9 is less than one-third of the upper diameter (larger diameter section) of the cyclone separator 1. The float 9 has a large buoyancy. The weight of the switch valve core 10 is 1-2 times that of the switch valve core 10, and the weight of the float 9 is greater than 25% of the weight of the switch valve core 10. The fulcrum (hinge point) of the lever 8 can be located at one-third of the length of the lever 8 and close to the side of the switch valve core 10. The fulcrum of the lever 8 can be installed on the upper side of the horizontal tube 7 through the existing known hinge seat, or it can be installed on the side of the horizontal tube 7 or on the upper inner side of the cyclone separator 1. In order for the lever 8 to swing up and down normally, the lever 8 and the horizontal tube 7 are staggered. In the initial state, the switch valve core 10 is away from the upper end of the vertical tube 12 under the weight of the float 9, and the upper end of the vertical tube 12 is opened.

[0032] When no liquid enters the upper part (large diameter section) of the hydrocyclone separator 1, the switch valve core 10 is pulled up by the float ball 9, opening the upper end of the vertical pipe 12. The second connecting line 4 is connected to the upper part of the separation chamber 2. If the liquid level in the lower part of the separation chamber 2 suddenly rises to the upper part, the float ball 9 floats up under the action of the liquid surface. After the float ball 9 floats up, it drives the lever 8 to swing. The left end of the lever 8 swings downward, causing the switch valve core 10 to descend and close the upper end of the vertical pipe 12, thereby closing the gas phase outlet. This reduces the outlet area and can reduce the inlet liquid flow. At this time, the separation chamber... The liquid phase in the upper part can enter the connecting pipe 6 through the oil phase outlet and drain into the scaling pipe. The liquid level in the separation chamber 2 drops, the float 9 drops, and the switch valve core 10 is lifted up and separated from the upper end of the vertical pipe 12. The vertical pipe 12 is connected to the separation chamber 2, and the second connecting pipeline 4 is restored to the connection state with the separation chamber 2. The liquid blocking mechanism can effectively prevent the backflow of liquid phase in the scaling pipe and avoid a series of adverse effects caused by backflow of liquid phase, such as equipment damage and process disorder, thereby improving the stability and safety of the convenient scale removal pipeline heating device.

[0033] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown, a valve seat 13 is fixed at the upper end of the vertical pipe 12. The upper end of the valve seat 13 is provided with a tapered through hole that is larger at the top and smaller at the bottom. The switch valve core 10 is spherical.

[0034] Depending on the requirements, the valve seat 13 is a known technology, such as a ball valve seat with an inner diameter of 30-50mm. The switch valve core 10 is a solid ball with a diameter 10-30mm larger than the inner diameter of the ball valve seat. The switch valve core 10 is made of rubber. The material of the switch valve core 10 can be selected according to the physicochemical properties of the produced fluid, choosing rubber products with different tensile strengths and good temperature resistance and oil resistance.

[0035] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown, an inlet pipe 14 is fixedly connected to the outside of the cyclone separator 1 at the corresponding inlet position. The left part of the inlet pipe 14 is inclined upward relative to the right part, and the inner wall of the front part of the inlet pipe 14 is tangent to the inner wall of the front part of the cyclone separator 1.

[0036] The left part of the inlet pipe 14 is inclined upward relative to the right part. The inclination angle of the inlet pipe 14 (the angle between the central axis of the inlet pipe 14 and the horizontal plane) is 45-75 degrees. The inner wall of the front part of the inlet pipe 14 is tangent to the inner wall of the front part of the hydrocyclone 1. In this way, the liquid phase can avoid the phenomenon of reduced flow rate when entering the separation chamber 2. This setting makes the gas-liquid mixture start to rotate when entering the separation chamber 2, so that the produced liquid quickly forms a rotating flow field after entering, which facilitates the separation of oil, gas and water phases after entering the produced liquid.

[0037] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown, the scaling tube includes a first heating tube 15, a second heating tube 16, and a third heating tube 17 arranged parallel to each other from bottom to top. The right side of the third heating tube 17 is inclined upward relative to the left side. The left end of the first heating tube 15 is fixedly connected to the water phase outlet. A lower connecting pipe 18 is fixedly connected between the upper right side of the first heating tube 15 and the lower right side of the second heating tube 16. An upper connecting pipe 19 is fixedly connected between the upper left side of the second heating tube 16 and the lower left side of the first heating tube 15. A connecting pipe 6 is fixedly connected between the upper right side of the third heating tube 17 and the oil phase inlet. A first connecting line 3 is fixedly connected between the lower right side of the third heating tube 17 and the liquid inlet of the treatment device. Openings are provided at the right ends of the first heating tube 15, the second heating tube 16, and the third heating tube 17.

[0038] The scaling assembly includes a first scaling device, a second scaling device 24, and a third scaling device 25. The left part of the first scaling device is located inside the first heating tube 15, and the right end of the first scaling device is detachably and fixedly installed together with the right end of the first heating tube 15. The left part of the second scaling device 24 is located inside the second heating tube 16, and the right end of the second scaling device 24 is detachably and fixedly installed together with the right end of the second heating tube 16. The left part of the third scaling device 25 is located inside the third heating tube 17, and the right end of the third scaling device 25 is detachably and fixedly installed together with the right end of the third heating tube 17.

[0039] The inclination angles of the first heating tube 15, the second heating tube 16, and the third heating tube 17 are all 45 degrees. To improve the connection strength between the scaling tube and the hydrocyclone 1, the left end of the second heating tube 16 can be fixedly installed together with the outside of the hydrocyclone 1, or a connecting rod can be fixedly installed between the left end of the second heating tube 16 and the outside of the hydrocyclone 1. The lower right side of the third heating tube 17 is connected to the first connecting pipe 3. The distance between the lower left side of the first heating tube 15 and the lower end of the hydrocyclone 1 is h1. The upper right side of the third heating tube 17 is connected to the connecting pipe 6. A connecting pipe 6 can be installed on the first connecting pipe 3. The existing known control valve is installed so that, under the principle of communicating vessels and the action of the control valve, the liquid level in the hydrocyclone 1 and the scaling tube is always at the same level. After being heated, the liquid phase flows out from the third heating tube 17 and enters the first connecting line 3, and finally enters the treatment device 5. The scaling tube includes a first heating tube 15, a second heating tube 16 and a third heating tube 17 arranged in parallel from bottom to top. The lengths of the first heating tube 15, the second heating tube 16 and the third heating tube 17 can decrease sequentially. In this way, the liquid level in the hydrocyclone 1 can always cover the scaling components during use.

[0040] The first heating tube 15, the second heating tube 16, and the third heating tube 17 are arranged at an angle. On the one hand, this allows the gas phase remaining in the liquid phase after the initial separation (separated by the cyclone separator 1) to quickly collect at the top of the scale-collecting tube under the action of buoyancy when it flows through the scale-collecting tube. Then, it enters the processing device 5 through the connecting pipe 6 and the second connecting line 4. This ensures the separation effect between the liquid and gas phases. On the other hand, it facilitates scale removal. After working for a period of time, the first scale collector, the second scale collector 24, and the third scale collector 25 can be removed to facilitate the cleaning of the scale deposited in the second heating tube 16 and the third heating tube 17, restoring the heating effect and scale-collecting effect of the scale-collecting components on the liquid phase of the produced fluid.

[0041] Example 6: As an optimization of Example 5 above, as shown in the appendix Figure 2 , 3As shown, the first scale collector includes fins 20 and a heating rod 21. The heating rod 21 is fitted inside the first heating tube 15. A connecting plate 22 is fixedly installed on the right end of the heating rod 21. The outside of the connecting plate 22 is detachably fixedly installed together with the right end of the first heating tube 15. Several fins 20 are fixedly installed at intervals along the length direction on the outside of the heating rod 21. Several flow holes 23 are distributed at intervals along the circumference on the side of the fins 20. The second scale collector 24 and the third scale collector 25 have the same structure as the first scale collector.

[0042] According to the requirements, the connecting plate 22 is a known blind flange. A known connecting flange is fixedly installed on the outer side of the right end of the first heating tube 15. The blind flange and the connecting flange are detachably fixed together by a number of connecting bolts and nuts evenly distributed along the circumference. The heating rod 21 is a known electric heating rod. During use, the liquid level always covers the heating rod 21 in the scaler to avoid the heating rod 21 being damaged by dry burning.

[0043] Heating rods 21 are installed inside the heating tube, which can not only increase the temperature of the produced fluid and reduce the viscosity of the oil phase, but also remove some of the scale-forming ions in the produced fluid, thereby achieving heating and scaling of the liquid phase in the pipeline.

[0044] The diameter of the third heating tube 17 is d2, m. The formula for calculating d2 is: d2 = delectricity + dfin + dring, where delectricity is the diameter of the heating rod 21, m; dhole is the diameter of the flow hole 23 on the fin 20, m; dfin is the width of the fin 20, m; and the width of the annular channel between the inner side of the third heating tube 17 and the outer side of the fin 20 is dring, m. The formula for calculating dring is as follows:

[0045] ;

[0046] Wherein, d is the diameter of the flow hole 23 on the fin 20, m; n is the number of flow holes 23 on the fin 20, number; Q is the liquid throughput in the third heating tube 17, L / s; and v is the liquid flow rate in the third heating tube 17, m / s.

[0047] After the separated liquid phase flows through multiple heating tubes, the heating time is extended. Multiple scale builders are installed, which can reduce the power of heating rod 21 while ensuring heating efficiency and improving the utilization rate of heating rod 21. This can reduce power consumption and cost, and avoid the problem of short heating time, high heating power and rapid scaling of the produced liquid when the liquid phase in the produced liquid is carried by the gas phase and passes through quickly or when gas is continuously emitted, which affects the normal operation of the equipment.

[0048] Example 7: As another optimization of Example 5 above, the only difference between this example and Example 6 is that a sleeve 26 is provided between the heating rod 21 and the fins 20, as shown in the attached figure. Figure 2 ,4 As shown, the first scaler includes a sleeve 26, fins 20, and a heating rod 21. The sleeve 26 is fitted inside the first heating tube 15. A connecting plate 22 is fixedly installed on the right end of the sleeve 26. The outside of the connecting plate 22 is detachably fixedly installed together with the right end of the first heating tube 15. The heating rod 21 is fitted inside the sleeve 26. Several fins 20 are fixedly installed at intervals along the length direction on the outside of the sleeve 26. Several flow holes 23 are distributed at intervals along the circumference on the side of the fins 20. The second scaler 24 and the third scaler 25 have the same structure as the first scaler.

[0049] According to the requirements, the heating rod 21 is a conventionally known electric heating rod, the connecting plate 22 is a conventionally known blind flange, and a conventionally known connecting flange is fixedly installed on the outer side of the right end of the first heating tube 15. The blind flange and the connecting flange are detachably fixed together by a number of connecting bolts and nuts evenly distributed along the circumference. The sleeve 26 is a conventionally known galvanized iron sleeve. The sleeve 26 is integrally set with the fins 20. During use, the liquid level always covers the heating rod 21 in the scaler to avoid the heating rod 21 being damaged by dry burning. The power of the heating rod 21 can be selected according to the requirements.

[0050] The heating tube is equipped with a detachable electric heating rod with a sleeve 26. By optimizing the material and structure of the sleeve 26, it can not only increase the temperature of the produced fluid and reduce the viscosity of the oil phase, but also remove some of the scale-forming ions in the produced fluid. Each heating tube is equipped with a detachable electric heating rod 21 with a sleeve 26, which effectively increases the heat transfer area and realizes the heating of the liquid phase and scaling in the pipeline.

[0051] The length of heating rod 21 is L1, m; then L1 = L - 0.1, where L is the length of the third heating tube 17, m; the length of sleeve 26 is L2, m; then L2 = 0.05 + L1, where L1 is the length of heating rod 21, m.

[0052] If N fins 20 are arranged on the sleeve 26, then N = L2 / (a+h), where h is the thickness of the fin 20 (m); a is the spacing between the fins 20 (m); and L2 is the length of the sleeve 26 (m).

[0053] In use, the wellhead outlet pipeline is connected to the inlet, and the produced fluid enters the cyclone separator 1 from the inlet. Oil and gas separation can be achieved in the cyclone separator 1, effectively avoiding the situation where the liquid is carried away by the gas. The separated liquid phase flows from the water phase outlet to the lower end of the scaling pipe. Since the scaling pipe is serpentine, the residence time of the separated liquid phase can be increased during the flow in the scaling pipe, which can improve the heating efficiency of the liquid phase in the scaling pipe when the scaling component is working. After heating, the scale-forming ions in the liquid phase can be removed. This can not only heat and reduce the viscosity of the separated liquid phase, but also achieve the descaling effect. It integrates oil and gas separation, heating and descaling functions, and solves the problems of reduced transportation efficiency and large equipment wear caused by oil and gas mixing, low temperature and scaling in pipelines. It achieves the purpose of improving pipeline transportation efficiency, extending equipment service life and reducing maintenance costs.

[0054] Example 8: As an optimization of the above examples, as shown in the appendix Figure 1 , 2 As shown, a first control valve 27 is installed on the first connecting pipeline 3, a first metering instrument 28 is installed on the first connecting pipeline 3 corresponding to the position between the first control valve 27 and the processing device 5, a moisture content meter 29 is installed on the first connecting pipeline 3 corresponding to the position between the first metering instrument 28 and the first control valve 27, a second control valve 30 is installed on the second connecting pipeline 4, and a second metering instrument 31 is installed on the second connecting pipeline 4 corresponding to the position between the second control valve 30 and the processing device 5.

[0055] According to the requirements, the first metering instrument 28 is a known flow meter, such as a mass flow meter; the first control valve 27 is a known liquid control valve; the second metering instrument 31 is a known gas flow meter; the second control valve 30 is a known gas control valve; the inner diameter of the processing device 5 is d4; the inner diameter of the first connecting pipeline 3 is d5; the inner diameter of the second connecting pipeline is d6; the processing device 5 is a known gas-liquid mixing device; the gas phase inlet of the gas-liquid mixing device is connected to the second connecting pipeline 4; the separated gas phase enters the gas phase inlet through the second connecting pipeline 4; the liquid phase inlet of the gas-liquid mixing device is connected to the first connecting pipeline 3; the heated and scaled liquid phase flows through... After passing through the first connecting pipeline 3, the gas enters the liquid phase inlet. Measuring instruments are installed on the first connecting pipeline 3 and the second connecting pipeline 4. The separated gas and liquid phases are measured by flow meters. The oil-water mixture in the liquid phase is measured by a mass flow meter. The mass flow meter can calculate the flow rate of pure water and pure oil by inputting the density of pure water and pure oil on site, thereby realizing the function of measuring oil production in oil wells. The flow meter can also be connected to a programmable controller and a computer. In this way, the computer can analyze and process the measurement parameters, automatically generate instantaneous parameter curves of oil, gas and water, as well as daily production reports, etc., and realize remote monitoring of measurement parameters according to user needs.

[0056] This application discloses a convenient descaling pipeline heating device that integrates a series of functions such as oil-gas separation, metering, heating, and descaling. It achieves efficient oil-gas separation and accurate metering, effectively avoids the situation where liquid is carried away by gas, increases the residence time of liquid, and improves the thermal efficiency of the device. The descaling component heats and reduces the viscosity of the separated liquid, while removing scale-forming ions from the liquid. This achieves heating, viscosity reduction, and descaling, solving problems such as reduced transport efficiency and high equipment wear caused by oil-gas mixing, low temperature, and descaling in pipelines. The goal is to improve pipeline transport efficiency, extend equipment service life, and reduce maintenance costs.

[0057] The convenient descaling pipeline heating device of this application can measure the liquid and gas phases after separation and heating. The computer can analyze and process the parameters collected by the metering instrument, and automatically generate liquid, gas, water (oil) metering curves and production reports, providing scientific support for the realization of refined oil well management. The liquid level is controlled by the first control valve 27 to ensure that the liquid level always covers the heating rod 21 in the pipeline, avoiding damage caused by dry burning of the heating rod 21.

[0058] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0059] The process of using this utility model:

[0060] Example 9: When the temperature of the produced fluid is less than 45°C:

[0061] The produced fluid enters the separation chamber 2 of the hydrocyclone 1 through the downward-sloping inlet pipe 14. Due to the swirling effect, centrifugal force, gravity and buoyancy form an inverted conical vortex surface. The denser liquid phase flows along the vertical pipe wall at the bottom of the hydrocyclone 1 to the bottom of the separation chamber 2, while the less dense gas phase rises along the center of the vortex to the top of the separation chamber 2. Finally, the gas phase and the liquid phase are discharged from the top and bottom of the separation chamber 2, respectively.

[0062] The gas phase is discharged from the top of the separation chamber 2, the pressure is regulated by the second control valve 30, and the separated gas phase is measured by the second metering instrument 31. The liquid phase flows to the lower part of the separation chamber 2, and the lower part of the separation chamber 2 is connected to the scaling pipe.

[0063] Based on the principle of communicating vessels and the adjustment of the first control valve 27, the liquid level in the separation chamber 2 is kept consistent with that in the scaling tube, and the liquid level always completely covers the heating rod 21 in the scaling tube, thus preventing the heating rod 21 from burning dry and being damaged.

[0064] The liquid phase undergoes heating and scaling in the scaling tubes. Since the produced fluid temperature is below 45°C, the three heating rods 21 in the first heating tube 15, the second heating tube 16, and the third heating tube 17 all start working to increase the liquid phase temperature to meet the produced fluid temperature requirements. For the heating rods 21 with sleeves 26, the lengths of the heating rods 21 from top to bottom are 0.7m (length of heating rod 21 in the third heating tube 17), 0.8m (length of heating rod 21 in the second heating tube 16), and 0.9m (length of heating rod 21 in the first heating tube 15), respectively. The corresponding sleeve lengths are 0.75m (length of sleeve 26 in the third heating tube 17), 0.85m (length of sleeve 26 in the second heating tube 16), and 0.95m (length of sleeve 26 in the first heating tube 15), respectively. The liquid phase flows through the first scaling device, the second scaling device 24, and the third scaling device 25, and the temperature rises rapidly, forming a scale layer on the surface of the heating rods 21 with sleeves 26.

[0065] After the liquid phase flows through the scaling pipe, it flows into the first connecting pipeline 3, where it is measured by the first metering instrument 28 and the water content meter 29. Then, the pure water volume and pure oil volume are calculated by inputting the density of pure water and pure oil on site, thus realizing the single quantity of oil produced by the oil well.

[0066] The separated gas phase and the liquid phase after heating and scaling treatment are respectively connected to the treatment device 5 (gas-liquid mixer) via the second connecting pipeline 4 and the first connecting pipeline 3 for mixing of the gas and liquid phases;

[0067] Over time, the scaling on sleeve 26 may become severe, reducing heating and descaling efficiency and affecting the normal operation of the system. At this time, the data measured by the metering system will change. When the pressure fluctuation measured by the portable descaling pipeline heating device is greater than 2MPa, or the opening of the second control valve 30 is less than 1 / 3, descaling treatment should be performed.

[0068] During the descaling process, the heating rod 21 with the sleeve 26 needs to be removed. After removal, check the scaling condition of the sleeve 26 and remove the scale on the sleeve 26 or replace it with a new sleeve 26 as needed. The new sleeve 26 can not only restore the scaling efficiency, but also extend the service life of the heating rod 21. After replacement, the heating rod 21 with the sleeve 26 is reinstalled in the scaling pipe to ensure that the portable descaling pipeline heating device can continue to operate efficiently. Similarly, the heating rod 21 can be descaled.

[0069] Example 10: When the temperature of the produced fluid is between 45°C and 70°C:

[0070] The produced fluid enters the separation chamber 2 of the hydrocyclone 1 through the downward-sloping inlet pipe 14. Due to the swirling effect, centrifugal force, gravity and buoyancy form an inverted conical vortex surface. The denser liquid phase flows along the vertical pipe wall at the bottom of the hydrocyclone 1 to the bottom of the separation chamber 2, while the less dense gas phase rises along the center of the vortex to the top of the separation chamber 2. Finally, the gas phase and the liquid phase are discharged from the top and bottom of the separation chamber 2, respectively.

[0071] The gas phase is discharged from the top of the separation chamber 2, the pressure is regulated by the second control valve 30, and the separated gas phase is measured by the second metering instrument 31. The liquid phase flows to the lower part of the separation chamber 2, and the lower part of the separation chamber 2 is connected to the scaling pipe.

[0072] Based on the principle of communicating vessels and the adjustment of the first control valve 27, the liquid level in the separation chamber 2 is kept consistent with that in the scaling tube, and the liquid level always completely covers the heating rod 21 in the scaling tube, thus preventing the heating rod 21 from burning dry and being damaged.

[0073] The liquid phase is heated and scaled in the scaling tube. Since the temperature of the produced liquid is greater than or equal to 45℃ and less than or equal to 70℃, both heating rods 21 in the second heating tube 16 and the third heating tube 17 start working to increase the liquid phase temperature to meet the produced liquid temperature requirements. For the heating rods 21 with sleeves 26, the lengths of the heating rods 21 from top to bottom are 0.7m (length of heating rod 21 in the third heating tube 17) and 0.8m (length of heating rod 21 in the second heating tube 16), respectively. The corresponding lengths of the sleeves 26 are 0.75m (length of sleeve 26 in the third heating tube 17) and 0.85m (length of sleeve 26 in the second heating tube 16). The liquid phase flows through the first scaling device, the second scaling device 24 and the third scaling device 25, and the temperature rises rapidly and a scale layer is formed on the surface of the heating rods 21 with sleeves 26.

[0074] After the liquid phase flows through the scaling pipe, it flows into the first connecting pipeline 3, where it is measured by the first metering instrument 28 and the water content meter 29. Then, the pure water volume and pure oil volume are calculated by inputting the density of pure water and pure oil on site, thus realizing the single quantity of oil produced by the oil well.

[0075] The separated gas phase and the liquid phase after heating and scaling treatment are respectively connected to the treatment device 5 (gas-liquid mixer) via the second connecting pipeline 4 and the first connecting pipeline 3 for mixing of the gas and liquid phases;

[0076] Over time, the scaling on sleeve 26 may become severe, reducing heating and descaling efficiency and affecting the normal operation of the system. At this time, the data measured by the metering system will change. When the pressure fluctuation measured by the portable descaling pipeline heating device is greater than 2MPa, or the opening of the second control valve 30 is less than 1 / 3, descaling treatment should be performed.

[0077] During the descaling process, the heating rod 21 with the sleeve 26 needs to be removed. After removal, check the scaling condition of the sleeve 26 and remove the scale on the sleeve 26 or replace it with a new sleeve 26 as needed. The new sleeve 26 can not only restore the scaling efficiency, but also extend the service life of the heating rod 21. After replacement, the heating rod 21 with the sleeve 26 is reinstalled in the scaling pipe to ensure that the portable descaling pipeline heating device can continue to operate efficiently. Similarly, the heating rod 21 can be descaled.

[0078] Example 11: When the temperature of the produced fluid is greater than 70℃:

[0079] The produced fluid enters the separation chamber 2 of the hydrocyclone 1 through the downward-sloping inlet pipe 14. Due to the swirling effect, centrifugal force, gravity and buoyancy form an inverted conical vortex surface. The denser liquid phase flows along the vertical pipe wall at the bottom of the hydrocyclone 1 to the bottom of the separation chamber 2, while the less dense gas phase rises along the center of the vortex to the top of the separation chamber 2. Finally, the gas phase and the liquid phase are discharged from the top and bottom of the separation chamber 2, respectively.

[0080] The gas phase is discharged from the top of the separation chamber 2, the pressure is regulated by the second control valve 30, and the separated gas phase is measured by the second metering instrument 31. The liquid phase flows to the lower part of the separation chamber 2, and the lower part of the separation chamber 2 is connected to the scaling pipe.

[0081] Based on the principle of communicating vessels and the adjustment of the first control valve 27, the liquid level in the separation chamber 2 is kept consistent with that in the scaling tube, and the liquid level always completely covers the heating rod 21 in the scaling tube, thus preventing the heating rod 21 from burning dry and being damaged.

[0082] The liquid phase is heated and scaled in the scaling tube. Since the temperature of the extracted liquid is greater than 70°C, the heating rod 21 in the third heating tube 17 starts to work to maintain the liquid phase temperature. For the heating rod 21 with the sleeve 26, the length of the heating rod 21 is 0.7m, and the length of the corresponding sleeve 26 is 0.75m. The liquid phase flows through the first scaling device, the second scaling device 24 and the third scaling device 25, and the temperature rises rapidly and a scale layer is formed on the surface of the heating rod 21 with the sleeve 26.

[0083] After the liquid phase flows through the scaling pipe, it flows into the first connecting pipeline 3, where it is measured by the first metering instrument 28 and the water content meter 29. Then, the pure water volume and pure oil volume are calculated by inputting the density of pure water and pure oil on site, thus realizing the single quantity of oil produced by the oil well.

[0084] The separated gas phase and the liquid phase after heating and scaling treatment are respectively connected to the treatment device 5 (gas-liquid mixer) via the second connecting pipeline 4 and the first connecting pipeline 3 for mixing of the gas and liquid phases;

[0085] Over time, the scaling on sleeve 26 may become severe, reducing heating and descaling efficiency and affecting the normal operation of the system. At this time, the data measured by the metering system will change. When the pressure fluctuation measured by the portable descaling pipeline heating device is greater than 2MPa, or the opening of the second control valve 30 is less than 1 / 3, descaling treatment should be performed.

[0086] During the descaling process, the heating rod 21 with the sleeve 26 needs to be removed. After removal, check the scaling condition of the sleeve 26 and remove the scale on the sleeve 26 or replace it with a new sleeve 26 as needed. The new sleeve 26 can not only restore the scaling efficiency, but also extend the service life of the heating rod 21. After replacement, the heating rod 21 with the sleeve 26 is reinstalled in the scaling pipe to ensure that the portable descaling pipeline heating device can continue to operate efficiently. Similarly, the heating rod 21 can be descaled.

Claims

1. A convenient pipe heating device for descaling, characterized in that... The device includes a hydrocyclone separator, a scaling component, a liquid blocking mechanism, a treatment device, and a serpentine scaling tube. The hydrocyclone separator has a closed separation chamber. From top to bottom, the outer side of the hydrocyclone separator has gas phase outlet, oil phase outlet, and water phase outlet. The water phase outlet is fixedly connected to the lower end of the scaling tube. The upper part of the scaling tube is fixedly connected to the oil phase outlet by a connecting pipe. The scaling component is detachably installed inside the scaling tube for heating the liquid inside the scaling tube and removing scale-forming ions from the liquid inside the scaling tube. The upper outer side of the scaling tube is fixedly connected to the liquid inlet of the treatment device by a first connecting line. The gas phase outlet is fixedly connected to the air inlet of the treatment device by a second connecting line. A liquid blocking mechanism is provided on the inner side of the upper part of the hydrocyclone separator corresponding to the gas phase outlet position. An inlet communicating with the separation chamber is provided on the outer side of the hydrocyclone separator.

2. The convenient descaling pipe heating device according to claim 1, characterized in that... The liquid blocking mechanism includes a horizontal tube, a lever, a float, and a switch valve core. A fixed tube is fixedly connected to the inner side of the upper part of the cyclone separator corresponding to the gas phase outlet position. The lower end of the fixed tube is fixedly connected to the right end of the horizontally arranged horizontal tube, and the left end of the horizontal tube is fixedly connected to the lower end of the vertically arranged vertical tube. A lever is hinged to the upper part of the horizontal tube. A float is installed at the right end of the lever, and a switch valve core is installed at the left end of the lever. The switch valve core can close the upper end of the vertical tube after swinging downward with the left end of the lever.

3. The convenient descaling pipe heating device according to claim 2, characterized in that... A valve seat is fixed at the upper end of the vertical pipe. The upper end of the valve seat has a tapered through hole that is larger at the top and smaller at the bottom. The valve core is spherical.

4. The convenient scale removal pipe heating device according to claim 1, 2, or 3, characterized in that... A liquid inlet pipe is fixedly connected to the outside of the cyclone separator corresponding to the inlet position. The left part of the liquid inlet pipe is inclined upward relative to the right part, and the inner wall of the front part of the liquid inlet pipe is tangent to the inner wall of the front part of the cyclone separator.

5. The convenient descaling pipe heating device according to claim 1, 2, or 3, characterized in that... The scaling system includes a first heating tube, a second heating tube, and a third heating tube arranged parallel to each other from bottom to top. The right side of the third heating tube is inclined upward relative to its left side. The left end of the first heating tube is fixedly connected to the water phase outlet. A lower connecting pipe is fixedly connected between the upper right side of the first heating tube and the lower right side of the second heating tube. An upper connecting pipe is fixedly connected between the upper left side of the second heating tube and the lower left side of the first heating tube. A connecting pipe is fixedly connected between the upper right side of the third heating tube and the oil phase inlet. A first connecting pipe is fixedly connected between the lower right side of the third heating tube and the liquid inlet of the treatment device. Between the openings, the right ends of the first heating tube, the second heating tube, and the third heating tube are all provided with openings. The scaling assembly includes a first scaling device, a second scaling device, and a third scaling device. The left part of the first scaling device is located inside the first heating tube, and the right end of the first scaling device is detachably and fixedly installed together with the right end of the first heating tube. The left part of the second scaling device is located inside the second heating tube, and the right end of the second scaling device is detachably and fixedly installed together with the right end of the second heating tube. The left part of the third scaling device is located inside the third heating tube, and the right end of the third scaling device is detachably and fixedly installed together with the right end of the third heating tube.

6. The convenient scale removal pipe heating device according to claim 4, characterized in that... The scaling system includes a first heating tube, a second heating tube, and a third heating tube arranged parallel to each other from bottom to top. The right side of the third heating tube is inclined upward relative to its left side. The left end of the first heating tube is fixedly connected to the water phase outlet. A lower connecting pipe is fixedly connected between the upper right side of the first heating tube and the lower right side of the second heating tube. An upper connecting pipe is fixedly connected between the upper left side of the second heating tube and the lower left side of the first heating tube. A connecting pipe is fixedly connected between the upper right side of the third heating tube and the oil phase inlet. A first connecting pipe is fixedly connected between the lower right side of the third heating tube and the liquid inlet of the treatment device. Between the openings, the right ends of the first heating tube, the second heating tube, and the third heating tube are all provided with openings. The scaling assembly includes a first scaling device, a second scaling device, and a third scaling device. The left part of the first scaling device is located inside the first heating tube, and the right end of the first scaling device is detachably and fixedly installed together with the right end of the first heating tube. The left part of the second scaling device is located inside the second heating tube, and the right end of the second scaling device is detachably and fixedly installed together with the right end of the second heating tube. The left part of the third scaling device is located inside the third heating tube, and the right end of the third scaling device is detachably and fixedly installed together with the right end of the third heating tube.

7. The convenient descaling pipe heating device according to claim 5, characterized in that... The first scale builder includes fins and a heating rod. The heating rod is fitted inside the first heating tube. A connecting plate is fixedly installed on the right end of the heating rod. The outside of the connecting plate is detachably and fixedly installed together with the right end of the first heating tube. Several fins are fixedly installed at intervals along the length direction on the outside of the heating rod. Several flow holes are distributed at intervals along the circumference on the side of the fins. The second and third scale builders have the same structure as the first scale builder. Alternatively, the first scaler includes a sleeve, fins, and a heating rod. The sleeve is fitted inside the first heating tube, and a connecting plate is fixedly installed on the right end of the sleeve. The outside of the connecting plate is detachably and fixedly installed together with the right end of the first heating tube. The heating rod is fitted inside the sleeve, and several fins are fixedly installed at intervals along the length of the sleeve. Several flow holes are distributed at intervals along the circumference on the side of the fins. The second and third scalers have the same structure as the first scaler.

8. The convenient descaling pipe heating device according to claim 6, characterized in that... The first scale builder includes fins and a heating rod. The heating rod is fitted inside the first heating tube. A connecting plate is fixedly installed on the right end of the heating rod. The outside of the connecting plate is detachably and fixedly installed together with the right end of the first heating tube. Several fins are fixedly installed at intervals along the length direction on the outside of the heating rod. Several flow holes are distributed at intervals along the circumference on the side of the fins. The second and third scale builders have the same structure as the first scale builder. Alternatively, the first scaler includes a sleeve, fins, and a heating rod. The sleeve is fitted inside the first heating tube, and a connecting plate is fixedly installed on the right end of the sleeve. The outside of the connecting plate is detachably and fixedly installed together with the right end of the first heating tube. The heating rod is fitted inside the sleeve, and several fins are fixedly installed at intervals along the length of the sleeve. Several flow holes are distributed at intervals along the circumference on the side of the fins. The second and third scalers have the same structure as the first scaler.

9. The convenient scale-removing pipe heating device according to claim 1, 2, 3, 6, 7, or 8, characterized in that... A first control valve is installed on the first connecting pipeline. A first metering instrument is installed on the first connecting pipeline corresponding to the position between the first control valve and the treatment device. A moisture content meter is installed on the first connecting pipeline corresponding to the position between the first metering instrument and the first control valve. A second control valve is installed on the second connecting pipeline. A second metering instrument is installed on the second connecting pipeline corresponding to the position between the second control valve and the treatment device.

10. The convenient descaling pipe heating device according to claim 4, characterized in that... A first control valve is installed on the first connecting pipeline. A first metering instrument is installed on the first connecting pipeline corresponding to the position between the first control valve and the treatment device. A moisture content meter is installed on the first connecting pipeline corresponding to the position between the first metering instrument and the first control valve. A second control valve is installed on the second connecting pipeline. A second metering instrument is installed on the second connecting pipeline corresponding to the position between the second control valve and the treatment device.

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