Electric heating device

Abstract

The utility model discloses an electric heating device, and relates to the technical field of oil and gas gathering and transportation electromagnetic heating. A heating body is connected to the skid seat, an electromagnetic heater is sleeved with the heating body, the bottom of the heating body is connected with an oil-gas inlet pipeline, the top of the heating body is connected with an oil-gas outlet pipeline, and a control cabinet is further installed on the skid seat. The electromagnetic heater comprises an outer-layer wire protecting pipe and an inner-layer heating pipe, the tails of the outer-layer wire protecting pipe and the inner-layer heating pipe are connected, and a plurality of electromagnetic coils are arranged between the outer-layer wire protecting pipe and the inner-layer heating pipe; the control cabinet is used for remote control and real-time regulation and control of the electric heating device, the outer-layer wire protection pipe, the inner-layer heating pipe and the heating body achieve multi-layer metal sleeve protection, sealing of a magnetic field can be achieved, electromagnetic interference is avoided, gasoline leakage is avoided, and meanwhile oil gas heating is more uniform due to double-layer annular heating of the outer-layer wire protection pipe and the inner-layer heating pipe. The device has the advantages of high heating efficiency, zero heating emission, convenience in installation, safety in operation and the like, and has good economic benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic heating for oil and gas gathering and transportation, in particular to an electric heating device. Background Technique

[0002] In the field of the petroleum industry, during the flow of the fluid produced from the oil and gas reservoir, as the temperature decreases, the wax-containing components in the crude oil gradually precipitate, the fluid viscosity continuously increases, the resistance increases, resulting in a decrease in the flow rate, thus reducing the oil and gas transportation volume. Seriously, pipeline blockage or fracture may occur, which not only directly affects the efficiency and stability of oil and gas transportation, but also poses a potential threat to the safe operation of the pipeline system. Therefore, increasing the temperature of the oil and gas in the pipeline is of great significance for the safe transportation of oil and gas. The main traditional methods for increasing the temperature of oil and gas are to lay hot water pipelines beside the oil transportation pipeline or to mix hot water into the crude oil pipeline or to heat the oil and gas through coal-fired and gas-fired heating furnaces; however, in recent years, due to the increasingly severe carbon emission situation and in order to actively respond to the call of the "dual carbon" goal and further reduce the carbon emissions of the oilfield heating furnaces, the traditional methods for increasing the temperature of oil and gas are no longer applicable. With the continuous development and improvement of the electric heating technology and the accelerated construction of clean power such as photovoltaic and wind power in the oilfield company, it is very important to urgently research, develop and promote an electric heating device that can meet the needs of the oilfield, is economical, environmentally friendly, safe and reliable. It has become an inevitable trend to carry out the research and development of an electric heating device with the advantages of zero emission, high efficiency and good economy. Content of the Utility Model

[0003] The purpose of the utility model is to provide an electric heating device, which can solve the problem that the wax-containing components in the crude oil precipitate due to the temperature decrease, resulting in a decrease in the flow rate and a reduction in the oil and gas transportation volume, with high heating efficiency, no electromagnetic radiation, zero emission during heating, and high safety in use, so as to overcome the deficiencies of the existing coal-fired heating furnace and gas-fired heating furnace with low heating efficiency and large carbon emissions.

[0004] The technical solution adopted by the utility model to solve the above problems is:

[0005] An electric heating device includes a skid base; a heating body is connected to the skid base, an electromagnetic heater is sleeved inside the heating body, an oil and gas inlet pipeline is connected to the bottom of the heating body, an oil and gas outlet pipeline is connected to the top of the heating body, and a control cabinet is also installed on the skid base; the electromagnetic heater includes an outer protective tube and an inner heating tube, the outer protective tube and the inner heating tube are connected at the tail, and a plurality of turns of electromagnetic coils are arranged in the middle; the control cabinet is used for the remote control and real-time regulation of the electric heating device. The outer protective tube, the inner heating tube and the heating body realize multi-layer metal sleeve protection, which can realize the sealing of the magnetic field, avoid electromagnetic interference and gasoline leakage. At the same time, the outer protective tube and the inner heating tube perform double-ring heating, making the heating of the oil and gas more uniform.

[0006] Furthermore, a first thermometer and a first temperature transmitter are installed on the oil and gas inlet pipeline, and a second thermometer and a second temperature transmitter are installed on the oil and gas outlet pipeline; the first thermometer can detect the temperature on the oil and gas inlet pipeline, the second temperature transmitter feeds back the temperature detected by the second thermometer to the control cabinet, the second thermometer can detect the temperature on the oil and gas outlet pipeline, and the second temperature transmitter feeds back the temperature detected by the second thermometer to the control cabinet. The control cabinet controls the start and stop of the electromagnetic heater and adjusts the heating power according to the feedback temperature.

[0007] Furthermore, a sewage discharge pipeline is also connected to the bottom of the heating body shell, and a handwheel is installed on the sewage discharge pipeline. The sewage discharge pipeline opens and closes the sewage outlet through the handwheel, which can enhance the reliability of the sewage outlet operation, occupy less floor area, facilitate sewage discharge, and can adjust the sewage discharge flow according to needs.

[0008] Furthermore, the outer protective tube of the electromagnetic heater does not come into contact with the shell of the heating body, which can make the oil and gas heating more uniform, avoid heat loss caused by high local temperature of the heating device shell, and the shell of the heating body is detachable to facilitate the regular cleaning of the inner cavity of the heating body and improve the heating efficiency.

[0009] Furthermore, the oil and gas inlet pipeline and the sewage discharge pipeline are connected and form a T-shaped passage with the heating body, which can reduce the connection ports between the cavity of the heating body and the pipeline, improve the sealing performance of the heating body, effectively reduce the risk of interface corrosion and leakage, and reduce the daily maintenance time.

[0010] Furthermore, a dry-run protection sensor is also set inside the electromagnetic heater, which can avoid damage to components such as the electromagnetic coil due to overheating caused by long-term dry running of the electromagnetic heater. The sound and light alarm can remind the inspection personnel to repair the device and troubleshoot faults.

[0011] Furthermore, multiple supports are set on the skid base, and the supports are used for fixing between the skid base and each device. The skid base is connected to the heating body shell and the control cabinet by bolts, which can realize the quick installation and disassembly of each component of the device, facilitate the transportation of the device and the daily maintenance, replacement and maintenance of each component.

[0012] Furthermore, the control cabinet controls the start, stop and power adjustment of the electromagnetic heater by controlling the temperature of the heating medium entering and leaving the oil and gas inlet pipeline and the oil and gas outlet pipeline. When the temperature of the heating medium is lower than the lower limit of the set value, the intelligent control cabinet controls the electromagnetic heater to start automatically; when the outlet temperature is higher than the set upper limit, the electromagnetic heater automatically stops heating operation or automatically adjusts the heating power. With this structure, the stable output of the oil and gas heating temperature can be realized.

[0013] Furthermore, the control cabinet can adjust the power automatically according to the temperatures of the heating medium flowing in and out of the oil-gas inlet pipeline and the oil-gas outlet pipeline, with the adjustment range being 0% - 100%; the control cabinet can set the temperatures of the oil-gas inlet pipeline and the oil-gas outlet pipeline to constantly heat the heating medium.

[0014] Compared with the prior art, the present utility model has the following beneficial technical effects:

[0015] The present utility model provides an electric heating device. By heating with electromagnetic coils, it solves the problems that due to the decrease in temperature, the paraffin-containing components in the crude oil precipitate, resulting in the reduction of flow velocity and the decrease of oil-gas transportation volume; the electromagnetic coils are arranged between the outer protective pipe and the inner heating pipe, and the electromagnetic coils are used for double-layer annular heating of the outer protective pipe and the inner heating pipe. The outer protective pipe and the inner heating pipe conduct double-layer heating on the oil-gas, making the heating of the oil-gas more uniform, with high heating efficiency, no electromagnetic radiation, and zero emissions during heating; at the same time, a control cabinet is provided to remotely control and real-time regulate the heating device, and to adjust and control the temperatures of the oil-gas inlet pipeline and the oil-gas outlet pipeline.

[0016] Furthermore, the electromagnetic coils of the present utility model are physically isolated from and do not contact the metal components, and the use safety is high.

[0017] Furthermore, a dry-run protection sensor is also provided inside the electromagnetic heater of the heating body. When the liquid level in the electromagnetic heater is low or the liquid supply stops, and the temperature of the heating components such as the electromagnetic coils is abnormally high, the dry-run protection sensor will be triggered to cut off the power and stop heating, which can avoid damage to components such as the electromagnetic coils due to overheating caused by long-term dry-running of the electromagnetic heater. The audible and visual alarm can remind the inspection personnel to repair the device and troubleshoot faults.

[0018] Furthermore, the present utility model adopts a skid-mounted structure, which is convenient for installation. The heating device body can be used alone or multiple units can be connected in series according to the working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the electric heating device in the embodiment of the present utility model.

[0020] Figure 2 It is the front view of the electric heating device in the embodiment of the present utility model.

[0021] Figure 3 It is the top view of the electric heating device in the embodiment of the present utility model.

[0022] Figure 4 It is the internal schematic diagram of the heating body of the electric heating device in the embodiment of the present utility model.

[0023] In the figure, 1 is the skid base; 2 is the thermometer; 3 is the oil and gas outlet pipeline; 4 is the heating body; 5 is the control cabinet; 6 is the sewage discharge pipeline; 7 is the handwheel; 8 is the temperature transmitter; 9 is the oil and gas inlet pipeline; 10 is the electromagnetic heater; 11 is the cable protection pipe; 12 is the electromagnetic coil; 13 is the heating pipe; 14 is the dry-run protection sensor; 15 is the support. Detailed implementation manners

[0024] In order to enable those skilled in the art of this technology to better understand the solution of this utility model, the following will clearly and completely describe the technical solutions in the embodiments of this utility model with reference to the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all of the embodiments. Based on the embodiments in this utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this utility model.

[0025] It should be noted that the terms "first", "second", etc. in the description and claims of this utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this utility model described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] Embodiment 1

[0027] Refer to Figures 1-4, the present utility model provides an electric heating device, including a skid base 1; a heating body 4 is bolted to the skid base 1, an electromagnetic heater 10 is sleeved inside the heating body 4, an oil and gas inlet pipeline 9 is connected to the bottom of the heating body 4, and an oil and gas outlet pipeline 3 is flange-connected to the top of the heating body 4. A control cabinet 5 is also installed on the skid base 1; the electromagnetic heater 10 includes an outer protective tube 11 and an inner heating tube 13, with multiple turns of electromagnetic coils 12 arranged in between. The tails of the outer protective tube 11 and the inner heating tube 13 are connected. The electromagnetic coils 12 can heat the outer protective tube 11 and the inner heating tube 13. After the outer protective tube 11 and the inner heating tube 13 are heated, they will conduct double-layer heating on the passing oil and gas, making the heating of the oil and gas more uniform, with high heating efficiency, no electromagnetic radiation, and zero heating emissions; the outer protective tube 11, the inner heating tube 13, and the outer shell of the heating body 4 are protected by the electromagnetic coils 12 with multiple layers of metal sleeves, which can achieve the sealing of the magnetic field, avoiding electromagnetic interference and gasoline leakage at the same time; the control cabinet 5 can automatically adjust the power of the electromagnetic heater 10 according to the temperatures of the oil and gas inlet pipeline 9 and the oil and gas outlet pipeline 3, realizing remote control and real-time regulation of the heating body 4.

[0028] The outer protective tube 11 of the electromagnetic heater 10 is coaxial with the outer shell of the heating body 4 without contact, which can make the heating of the oil and gas more uniform and avoid heat loss caused by high local temperature of the heating device's outer shell; the detachable heating body 4 is for the convenience of regular cleaning of the inner cavity 4 of the heating body, improving the heating efficiency.

[0029] Multiple supports 15 are provided on the skid base 1. The supports 15 are used for fixing between the skid base 1 and each device. The skid base 1 is bolted to the heating body 4 and the control cabinet 5. With this structure, the quick installation and disassembly of each component of the device can be realized, facilitating the transportation of the device and the daily maintenance, replacement, and maintenance of each component.

[0030] The control cabinet 5 realizes the start, stop, or regulation of the electromagnetic heater 10 by controlling the temperatures of the heating medium entering the oil and gas inlet pipeline 9 and the oil and gas outlet pipeline 3; when the temperature of the heating medium is lower than the lower limit of the set value, the control cabinet 5 controls the electromagnetic heater 10 to start automatically; when the temperatures of the oil and gas inlet pipeline 9 and the oil and gas outlet pipeline 3 are higher than the set upper limit, the electromagnetic heater 10 automatically stops heating operation or automatically adjusts the power for heating. With this structure, a stable output of the oil and gas heating temperature can be achieved.

[0031] The control cabinet 5 can perform automatic power adjustment. According to the temperature changes of the oil and gas inlet pipeline 9 and the oil and gas outlet pipeline 3, it can achieve automatic stepless adjustment of the electric heating power, with an adjustment range of 0% to 100%. It can also arbitrarily set the temperature values of the oil and gas inlet pipeline 9 and the oil and gas outlet pipeline 3 to constantly heat the heating medium. The automatic power adjustment has soft start and soft stop functions; the electromagnetic heater 10 controls the current during startup or shutdown and has voltage delay to avoid grid fluctuations caused by instantaneous full-power input. With this structure, the heating temperatures of the oil and gas inlet pipeline 9 and the oil and gas outlet pipeline 3 can be freely adjusted as needed, and the voltage delay function can effectively prevent sudden power changes from damaging the circuit.

[0032] Embodiment 2

[0033] Based on Embodiment 1, a first thermometer 2-1 and a first temperature transmitter 8-1 are installed on the oil and gas inlet pipeline 9, and a second thermometer 2-2 and a second temperature transmitter 8-2 are installed on the oil and gas outlet pipeline 3; the first thermometer 2-1 detects the temperature of the heating medium entering the oil and gas inlet pipeline 9, and the first temperature transmitter 8-1 feeds back the detected temperature to the control cabinet 5. The second thermometer 2-2 detects the temperature of the heating medium entering the oil and gas outlet pipeline 3, and the second temperature transmitter 8-2 feeds back the detected temperature to the control cabinet 5. After receiving the feedback temperature of the heating medium, the control cabinet 5 operates to start, stop, and adjust the power of the electromagnetic heater 10.

[0034] Embodiment 3

[0035] Based on Embodiment 2, a dry-run protection sensor 14 is also provided inside the electromagnetic heater 10. When the liquid level of the heating medium is low or the incoming liquid stops, and the temperature of the heating components such as the electromagnetic coil 12 is abnormally high, the dry-run protection sensor 14 will be triggered to cut off the power supply and stop heating, and give an audible and visual alarm. With this structure, it can prevent the electromagnetic heater 10 from being dry-run for a long time, resulting in overheating and damage of components such as the electromagnetic coil 12. At the same time, the audible and visual alarm can remind the patrol personnel to repair the device and troubleshoot faults.

[0036] Embodiment 4

[0037] Based on Embodiment 3, a drain pipeline 6 is also connected to the bottom of the heating body 4. A handwheel 7 is installed on the drain pipeline 6. The drain pipeline 6 is opened and closed through the handwheel 7 to discharge the sewage, which can enhance the reliability of the sewage discharge port operation, occupy less floor area, and is convenient for sewage discharge. The sewage discharge flow can be adjusted as needed; the oil and gas inlet pipeline 9 is connected to the drain pipeline 6 and forms a T-shaped passage with the heating body 4, which can reduce the number of connection ports between the cavity of the heating body 4 and the pipeline, thereby improving the sealing performance of the heating body 4, effectively reducing the risk of interface corrosion and leakage, and reducing the daily maintenance time.

[0038] Working principle of the present invention:

[0039] After the heating device is powered on, the control cabinet 5 starts to work. Under pressure, the oil-gas inlet pipeline 9 transports low-temperature oil-gas to the inner cavity of the heating body 4. The first thermometer 2-1 detects the temperature of the oil-gas entering the oil-gas inlet pipeline 9, and the first temperature transmitter 8-1 feeds back the detected temperature to the control cabinet 5. When the oil-gas content reaches the heating standard, the electromagnetic heater 10 inside the heating body 4 starts to work, the electromagnetic coil 12 generates heat, and quickly heats the inner heating pipe 13 and the outer protection pipe 11. The heat is evenly transferred to the low-temperature oil-gas, causing the low-temperature oil-gas to quickly heat up. Under the continuous action of pressure, the oil-gas flows out from the oil-gas outlet pipeline 3. The second thermometer 2-2 detects the temperature of the heating medium entering the oil-gas outlet pipeline 3, and the second temperature transmitter 8-2 feeds back the detected temperature to the control cabinet 5. The control cabinet 5 ensures the stability of the temperature of the oil-gas outlet pipeline 3 by adjusting the heating power and starting and stopping of the electromagnetic heater 10. When the oil-gas liquid volume is low or the incoming liquid stops, the temperature of the heating components such as the electromagnetic coil 12 is abnormally high, which will trigger the dry-run protection sensor to cut off the power supply and stop heating, and issue an audible and visual alarm to remind the inspection personnel to conduct fault troubleshooting, thereby ensuring the smooth transportation of the oil-gas in the pipeline.

[0040] The above embodiments are only the preferred technical solutions of the present utility model, and should not be regarded as a limitation to the present utility model. The protection scope of the present utility model should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present utility model.

Claims

1. An electric heating device, characterized in that, It includes a skid base (1); a heating body (4) is connected to the skid base (1), an electromagnetic heater (10) is sleeved inside the heating body (4), an oil and gas inlet pipeline (9) is connected to the bottom of the heating body (4), an oil and gas outlet pipeline (3) is connected to the top, and a control cabinet (5) is also installed on the skid base (1); The electromagnetic heater (10) includes an outer protective tube (11) and an inner heating tube (13), the outer protective tube (11) and the inner heating tube (13) are connected at the tail, and multiple turns of electromagnetic coils (12) are arranged in the middle.

2. The electric heating device according to claim 1, characterized in that, A first thermometer (2-1) and a first temperature transmitter (8-1) are installed on the oil and gas inlet pipeline (9), and a second thermometer (2-2) and a second temperature transmitter (8-2) are installed on the oil and gas outlet pipeline (3).

3. An electric heating device according to claim 1, characterized in that, A drain pipeline (6) is also connected to the bottom of the heating body (4), and a handwheel (7) is installed on the drain pipeline (6).

4. An electric heating device according to claim 1, characterized in that, The outer protective tube (11) of the electromagnetic heater (10) does not come into contact with the outer shell of the heating body (4), and the heating body (4) is detachable.

5. An electric heating device according to claim 3, characterized in that, The oil and gas inlet pipeline (9) and the drain pipeline (6) are connected and form a T-shaped passage with the heating body (4).

6. An electric heating device according to claim 4, characterized in that, An anti-dry burning protection sensor (14) is also arranged inside the electromagnetic heater (10).

7. An electric heating device according to claim 1, characterized in that, Multiple supports (15) are arranged on the skid base (1).

8. An electric heating device according to claim 7, characterized in that, The skid base (1) is connected to the heating body (4) and the control cabinet (5) by bolts.

9. An electric heating device according to claim 1, characterized in that, The control cabinet (5) controls the start, stop, and power adjustment of the electromagnetic heater (10) by controlling the temperature of the heating medium entering and leaving the oil and gas inlet pipeline (9) and the oil and gas outlet pipeline (3).

10. An electric heating device according to claim 9, characterized in that, The control cabinet (5) can automatically adjust the power according to the temperature of the heating medium entering and leaving the oil and gas inlet pipeline (9) and the oil and gas outlet pipeline (3), and the adjustment range is 0% to 100%; the control cabinet (5) can set the temperature of the oil and gas inlet pipeline (9) and the oil and gas outlet pipeline (3) to constantly heat the heating medium.

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