CN110608370A - Electromagnetic heating device and heating method for digital well site crude oil - Google Patents
Electromagnetic heating device and heating method for digital well site crude oil Download PDFInfo
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- CN110608370A CN110608370A CN201910879710.9A CN201910879710A CN110608370A CN 110608370 A CN110608370 A CN 110608370A CN 201910879710 A CN201910879710 A CN 201910879710A CN 110608370 A CN110608370 A CN 110608370A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 224
- 239000010779 crude oil Substances 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- 239000003921 oil Substances 0.000 claims description 48
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 239000003129 oil well Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000011664 signaling Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 229910021645 metal ion Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/34—Heating of pipes or pipe systems using electric, magnetic or electromagnetic fields, e.g. using induction, dielectric or microwave heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/18—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- General Induction Heating (AREA)
Abstract
The invention belongs to the technical field of crude oil heating, and particularly relates to an electromagnetic heating device and a heating method for digital well site crude oil. The invention provides a crude oil heating device and a crude oil heating method which can heat an electromagnetic heating body through crude oil of the electromagnetic heating body, a variable frequency control cabinet which is connected with the electromagnetic heating body through an electric wire and is used for changing the frequency of an input power frequency power supply, and a remote monitoring system which is connected with the variable frequency control cabinet through an electric signal and is used for receiving and sending the electric signal and controlling the starting and stopping of the variable frequency control cabinet, wherein the crude oil heating device and the crude oil heating method can be used for heating the crude oil without a heat source and heating in a single direction, and are high in heat efficiency, safe, environment-friendly and energy; the invention has the characteristics of high electric heating efficiency, low failure rate, simple and convenient maintenance.
Description
Technical Field
The invention belongs to the technical field of crude oil heating, and particularly relates to an electromagnetic heating device and a heating method for digital well site crude oil.
Background
When crude oil is pumped out from the underground, the temperature of the crude oil is gradually reduced due to the influence of the temperature of the stratum and air, and particularly in the process of transporting the crude oil in a pipeline in winter, the temperature is reduced more quickly, so that the wax deposition phenomenon easily occurs on the inner wall of the oil pipeline outside a well head, the effective diameter of the pipeline is reduced, the back pressure is increased, the system efficiency and the pump efficiency are reduced, the yield of an oil well is reduced, the pipeline can be blocked in serious conditions, the economic loss is caused, and the production cost is increased. At present, the mode of heating crude oil in a well site by an oil field is that the crude oil in the well site is heated by a well site combustion associated gas heating furnace and a coal-fired heating furnace and can be conveyed after being heated to a certain temperature. However, most wellsites now have no associated gas and gas fired furnaces have been taken out of service; the coal-fired heating furnace has the advantages of environmental pollution, high heating cost, poor heating effect and incapability of realizing digital remote monitoring. The heating of the heat tracing band and various electric heating tubes is adopted, the heat tracing band has low heat efficiency, the maintenance is difficult after the underground is damaged, and a large amount of earthwork is often required to be moved.
Disclosure of Invention
The invention provides an electromagnetic heating device and a heating method for crude oil of a digital well site, and aims to provide a crude oil heating device and a heating method which can carry out non-heat source one-way internal heating, have high heat efficiency, are safe, environment-friendly and energy-saving; the second purpose is to provide a crude oil heating device and a heating method which have high electric heating efficiency, low failure rate and simple and convenient maintenance.
In order to achieve the purpose, the invention adopts the technical scheme that:
an electromagnetic heating device for digitalized crude oil in well site comprises
The electromagnetic heating body is used for heating the crude oil passing through the electromagnetic heating body;
the variable frequency control cabinet is connected with the electromagnetic heating body through a wire and used for changing the frequency of an input power frequency power supply;
and the remote monitoring system is in electric signal connection with the variable frequency control cabinet and is used for receiving and sending electric signals and controlling the starting and stopping of the variable frequency control cabinet.
The electromagnetic heating body comprises an oil inlet pipe, an explosion-proof junction box, a heating shell, a heating unit and an oil outlet pipe; the heating device comprises an oil inlet pipe, an explosion-proof junction box, a heating unit, an oil outlet pipe, a metal mesh enclosure and a heating shell, wherein the oil inlet pipe is connected with one end of the explosion-proof junction box, the end face of the other end of the explosion-proof junction box is connected with the heating unit, the heating unit is connected in the heating shell, the upper part of the heating shell is connected with the oil outlet pipe, the joint of the oil outlet pipe and the heating shell is provided with; the lower surface of the end of the heating shell far away from the explosion-proof junction box is provided with a drain port
The heating unit comprises a wire protecting pipe, an electromagnetic coil and a heating pipe; the electromagnetic coil is covered with a wire protection pipe, the electromagnetic coil covering the wire protection pipe is sleeved outside the heating pipe, the electromagnetic coil is connected to the end face of the other end of the explosion-proof junction box, and the heating pipe is communicated with the oil inlet pipe; and the electromagnetic coil is connected with the variable frequency control cabinet through an explosion-proof junction box.
The lower surface of the heating shell is connected with a saddle, and the upper surface of the heating shell is connected with a lifting ring.
The metal mesh enclosure is a steel mesh enclosure.
The remote monitoring system comprises a control terminal, a temperature sensor and a pressure sensor; the temperature sensor and the pressure sensor are connected with the heating shell, the temperature sensor and the pressure sensor are in electric signal connection with the control terminal, and the control terminal is in electric signal connection with the variable frequency control cabinet.
The total length of the electromagnetic heating body is 5000mm, the outer diameter is 400mm, and the pressure bearing capacity is 10 MPa.
The variable frequency control cabinet comprises a control cabinet shell, a rectifying circuit, a variable frequency circuit and a control switch; the rectification circuit, the frequency conversion circuit and the control switch are connected in the shell; the input end of the rectifying circuit is connected with an external power supply, the output end of the rectifying circuit is connected with the input end of the frequency conversion circuit, and the output end of the frequency conversion circuit is connected with the electromagnetic heating body; the control switch and the frequency conversion circuit are in electric signal connection with a remote monitoring system; the rectification circuit is used for converting alternating-current voltage into direct-current voltage, and the frequency conversion circuit is used for converting the direct-current voltage into high-frequency voltage with the frequency of 20-40 KHz.
A heating method of an electromagnetic heating device for digitalized well site crude oil comprises the following steps
The method comprises the following steps: electromagnetic heating device for installing digital well site crude oil
Placing a digital well site crude oil electromagnetic heating device at a self-positioning position, turning off an oil well of an oil pumping machine, staying for 8-12 minutes, connecting a crude oil input pipeline with an oil input pipe through a crude oil inlet flange, and connecting an oil output pipe with a crude oil output pipeline through a crude oil outlet flange; then, after opening the crude oil inlet flange and the crude oil outlet flange, connecting a power supply, a load, a control line and a signal line, finishing wiring, checking and confirming the wiring correctness, starting the oil well of the oil pumping unit, and enabling crude oil of the oil well to flow in from the inlet flange and flow out from the crude oil outlet flange;
step two: the electromagnetic heating device for the crude oil in the digital well site starts to work
When the first step is completed and the power transmission safety is confirmed, switching on a main power supply air switch; observing whether the variable frequency control cabinet is normal or not, and whether abnormal actions exist or not; after the variable frequency control cabinet works, the digital well site crude oil electromagnetic heating device starts to work;
step three: acquiring data and implementing control
After the second step is finished, the remote monitoring system controls the variable frequency control cabinet by acquiring and sending pressure and temperature information in the electromagnetic heating body; when the temperature rises to the preset on-line temperature, the remote monitoring system sends a shutdown instruction, the variable frequency control cabinet is shut down, and the digital well site crude oil electromagnetic heating device is in a state to be heated; when the temperature is reduced to a preset offline temperature, the remote monitoring system sends a starting instruction, the variable frequency control cabinet is started, and the digital well site crude oil electromagnetic heating device starts to heat;
step four: digital well site crude oil electromagnetic heating device stops working
When the digital well site crude oil electromagnetic heating device breaks down or does not need heating, the remote monitoring system sends an instruction, the variable frequency control cabinet stops working, and the digital well site crude oil electromagnetic heating device stops heating.
And in the first step, the oil well of the oil pumping machine is shut off, and the staying time is 10 minutes.
Has the advantages that:
(1) high-efficiency and energy-saving:
the invention can lead the temperature of the national standard metal pipeline to reach more than 100 ℃ after being started for twenty seconds. The heat efficiency is up to more than 98%, under the same condition, the energy is saved by 30-80% compared with a resistance type heating mode, and the preheating time is shortened by 1/2-2/3.
(2) The performance is stable:
the invention is electromagnetic induction heating, so magnetic lines of force can quickly penetrate through the heat-insulating material without damaging the heat-insulating layer of the pipeline. The safe and energy-saving electromagnetic heating frequency range specified by the State environmental protection administration is adopted, so that the influence on a human body is avoided, and in addition, the potential safety hazards such as electric leakage and the like and the possibility of overhigh temperature do not exist because the non-contact electromagnetic heating is adopted. The invention can work for 1.5 ten thousand hours without fault, which is longer than the continuous full-load work time of any electric heating product in the prior art.
(3) The cost is reduced:
the invention adopts the coil for heating, does not generate heat per se, has long service life, avoids the problems that the resistance type heating needs frequent maintenance and regular replacement of the heating coil, and basically has no maintenance cost in the later period.
(4) Improving the environment:
the invention has the characteristic of inward heating, so that the outward heat loss is small, thereby obviously reducing the temperature of the working environment and achieving the best environment-friendly effect.
(5) The operation is convenient:
the heating device can be heated by switching on a power supply after being installed, and the heating device is automatically stopped when the temperature rises to the designed upper limit temperature; when the temperature is reduced to the designed lower limit temperature, the heating device is automatically started; the invention is flexible design, and is suitable for heating various metal pipelines with different shapes.
(6) Safe and reliable:
the invention adopts electromagnetic induction heating and water-electricity separation; the invention adopts a plurality of inductive probes, and when the temperature exceeds 150 ℃, the host machine is automatically locked and stopped. The invention has soft start, soft shut-off and no start-up impulse current, and avoids the damage caused by voltage fluctuation. The invention can set temperature and automatically control temperature.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of a heating method of the present invention.
In the figure: 1-crude oil inlet flange; 2-oil inlet pipe; 3-explosion-proof junction box; 4-a connecting flange; 5-hoisting rings; 6-heating the shell; 7-a conduit; 8-an electromagnetic coil; 9-heating a tube; 10-crude oil outlet flange; 11-an oil outlet pipe; 12-a temperature sensor; 13-a pressure sensor; 14-a clean discharge port; 15-saddle seat; 16-frequency conversion control cabinet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
an electromagnetic heating device for digitizing crude oil at well site shown in FIG. 1 comprises
The electromagnetic heating body is used for heating the crude oil passing through the electromagnetic heating body;
the variable frequency control cabinet 16 is connected with the electromagnetic heating body through a wire and used for changing the frequency of an input power frequency power supply;
and the remote monitoring system is in electric signal connection with the variable frequency control cabinet and is used for receiving and sending electric signals and controlling the starting and stopping of the variable frequency control cabinet 16.
In actual use, the oil well of the oil pumping machine is shut down, and after the oil well stays for 10 minutes, the oil pumping machine is connected with a crude oil input pipeline and a crude oil output pipeline through a crude oil inlet flange 1 and a crude oil outlet flange 10; and then, opening the crude oil inlet flange 1 and the crude oil outlet flange 10, starting the variable frequency control cabinet 16, converting 50/60Hz alternating current voltage supplied by an external power supply into direct current voltage by the variable frequency control cabinet 16, converting the direct current voltage into high-frequency voltage with the frequency of 20-40KHz, and outputting the high-frequency voltage to the electromagnetic heating body. When the high-frequency power supply passes through the electromagnetic heating body, a high-frequency magnetic field is generated to activate molecular motion, so that the aim of rapid heating is fulfilled.
The invention adopts non-heat source one-way internal heating, the technical scheme of the invention is adopted to heat crude oil, and the heating body is started for twenty seconds to ensure that the temperature of a national standard metal pipeline can reach more than 100 ℃. The heat efficiency is up to more than 98%, under the same condition, the energy is saved by 30-80% compared with a resistance type heating mode, and the preheating time is shortened by 1/2-2/3. The electromagnetic heating device has no influence on a human body, and has no potential safety hazards such as electric leakage and the like and no possibility of overhigh temperature because of non-contact electromagnetic heating.
Thus. The invention has high thermal efficiency, safety, environmental protection and energy saving; the invention has low failure rate, simple and convenient maintenance and environmental protection.
Example two:
the electromagnetic heating device for the digitalized crude oil at the well site shown in the figure 1 is different from the first embodiment in that: the electromagnetic heating body comprises an oil inlet pipe 2, an explosion-proof junction box 3, a heating shell 6, a heating unit and an oil outlet pipe 11; the oil inlet pipe 2 is connected with one end of the explosion-proof junction box 3, the end face of the other end of the explosion-proof junction box 3 is connected with a heating unit, the heating unit is connected in a heating shell 6, the upper part of the heating shell 6 is connected with an oil outlet pipe 11, a metal mesh cover is arranged at the joint of the oil outlet pipe 11 and the heating shell 6, and the heating shell 6 is connected with the other end of the explosion-proof junction box 3 through a connecting flange 4; the lower surface of the end of the heating shell 6 far away from the explosion-proof junction box 3 is provided with a clean discharge port 14
Preferably, the metal mesh enclosure is a steel mesh enclosure.
In practical use, low-temperature crude oil flows in from the oil inlet pipe 2 under the action of pipeline pressure, is heated for the first time by the heating unit and then flows out from the tail oil outlet pipe 11. The joint of the oil outlet pipe 11 and the heating shell 6 is provided with a steel screen cover, so that the steel ball is dredged to smoothly pass through the heater when the high-pressure steel ball sweeps the line. By adopting the technical scheme of the invention, the low-temperature crude oil is uniformly heated and the heat utilization rate is high.
Example three:
the electromagnetic heating device for the digitalized crude oil at the well site shown in the figure 1 is different from the second embodiment in that: the heating unit comprises a line protection pipe 7, an electromagnetic coil 8 and a heating pipe 9; the electromagnetic coil 8 is externally coated with a wire protection tube 7, the electromagnetic coil 8 coated with the wire protection tube 7 is sleeved outside the heating tube 9, the electromagnetic coil 8 is connected to the end face of the other end of the explosion-proof junction box 3, and the heating tube 9 is communicated with the oil inlet tube 2; the electromagnetic coil 8 is connected with a variable frequency control cabinet 16 through an explosion-proof junction box 3 by an electric wire.
When the device is in actual use, low-temperature crude oil flows in from the oil inlet pipe 2, flows out from the tail end after being heated for the first time by the heating pipe 9, and flows out from the oil outlet pipe 11 after being heated again by the wire protection pipe 7, so that the temperature required by the process can be obtained.
The electromagnetic coil 8 of the invention which coats the protective wire tube 7 is sleeved outside the heating tube 9 to form a closed magnetic field, after the electromagnetic coil is electrified, the current of the electromagnetic coil enables the heating shell 6 to rapidly generate strong magnetic hysteresis eddy current and magnetic resistance heat effect heat, and the heat is the main heat of the heater; and stray magnetic fields released by the coils are shielded and absorbed by the heating shell 6 and generate skin effect heat in the circular ring, and the stray magnetic fields are used for directly heating again. The electromagnetic induction heating directly heats the heating shell 6 through magnetic field energy, has no heat transfer process, generates heat bidirectionally, has low surface heat load and is not easy to carbonize and coke. Therefore, the electromagnetic heating efficiency is higher than that of an electric heating tube, the heating is uniform, and the heat utilization rate is high.
Under the action of high-frequency electromagnetic field, the crude oil in the invention greatly weakens the binding force of metal ions in liquid, can ensure that metal ions such as calcium, sodium, magnesium and the like in the liquid are orderly arranged and are not suitable for binding, and weakens the formation of scale, thereby not influencing heat exchange, having no fault after long-term use and prolonging the service life of the invention.
Example four:
the electromagnetic heating device for the digitalized crude oil at the well site shown in the figure 1 is different from the second embodiment in that: the lower surface of the heating shell 6 is connected with a saddle 15, and the upper surface of the heating shell 6 is connected with a lifting ring 5.
In actual use, the saddle 15 is connected to the lower surface of the heating shell 6, so that the stability of the electromagnetic heating device is good, the electromagnetic heating device for the digital well site crude oil can work continuously and stably, and the occurrence of faults is effectively reduced. When the electromagnetic heating device is installed and moved, the lifting ring 5 connected with the upper surface of the heating shell 6 is used for lifting, so that the electromagnetic heating device is convenient to install and move.
Example five:
the electromagnetic heating device for the digitalized crude oil at the well site shown in the figure 1 is different from the first embodiment in that: the remote monitoring system comprises a control terminal, a temperature sensor 12 and a pressure sensor 13; the temperature sensor 12 and the pressure sensor 13 are connected with the heating shell 6, the temperature sensor 12 and the pressure sensor 13 are in electric signal connection with a control terminal, and the control terminal is in electric signal connection with a variable frequency control cabinet 16.
In practical use, the remote monitoring system is arranged, so that the automatic remote control is realized, and the manpower is saved. The control terminal of the embodiment adopts a computer in the prior art, and the functions of the control terminal are conveniently realized.
Example six:
the electromagnetic heating device for the digitalized crude oil at the well site shown in the figure 1 is different from the first embodiment in that: the total length of the electromagnetic heating body is 5000mm, the outer diameter is 400mm, and the pressure bearing capacity is 10 MPa.
When in actual use, the electromagnetic heating body is 5000mm in total length and 400mm in outer diameter, so that the operation of various sweeping lines is not influenced; the technical scheme that the pressure bearing capacity is 10MPa enables the high-pressure steam line sweeping not to be affected, and the steel mesh cover arranged at the joint of the oil outlet pipe 11 and the heating shell 6 enables the high-pressure steel balls to smoothly pass through the heater during line sweeping and to be discharged from the oil outlet pipe 11.
Example seven:
the electromagnetic heating device for the digitalized crude oil at the well site shown in the figure 1 is different from the first embodiment in that: the variable frequency control cabinet 16 comprises a control cabinet shell, a rectifying circuit, a variable frequency circuit and a control switch; the rectification circuit, the frequency conversion circuit and the control switch are connected in the shell; the input end of the rectifying circuit is connected with an external power supply, the output end of the rectifying circuit is connected with the input end of the frequency conversion circuit, and the output end of the frequency conversion circuit is connected with the electromagnetic heating body; the control switch and the frequency conversion circuit are in electric signal connection with a remote monitoring system; the rectification circuit is used for converting alternating-current voltage into direct-current voltage, and the frequency conversion circuit is used for converting the direct-current voltage into high-frequency voltage with the frequency of 20-40 KHz.
When the electromagnetic heating device is actually used, the control switch is turned on, current enters the rectifying circuit, the rectifying circuit converts 50/60Hz alternating current voltage into direct current voltage, the direct current voltage is converted into high-frequency voltage with the frequency of 20-40KHz through the frequency conversion circuit, when alternating current with high speed change flows through the electromagnetic coil 8, the electromagnetic coil 8 can generate a magnetic field with high speed change, when alternating magnetic lines of force in the magnetic field pass through the heating shell 6 (magnetic conduction and conductive materials), countless small eddy currents are generated in the metal body, so that the heating shell 6 can generate heat by itself, and then the heating of low-temperature oil is completed by heat dissipation of the heating shell 6. The frequency conversion circuit is controlled by a frequency converter, and strong current, soft start and soft shut-off are controlled by weak current, so that the operation is stable; the power of the frequency conversion circuit is variable, gear control is adopted according to different seasons, an air switch in the frequency conversion control cabinet 16 can be switched off when heating is conducted in summer, heating power is reduced, the product adopts an advanced heating technology and a gear energy-saving control method, and energy can be saved by about 20% compared with a traditional resistance-type heater. The remote control terminal can remotely and intelligently increase or reduce the heating power according to different pipeline pressures and seasons, and the effect of saving energy by more than 30 percent can be achieved.
The fault-free working time of the variable frequency control cabinet 16 can reach 1.5 ten thousand hours, which is longer than the continuous full-load working time of any electric heating product. Has no influence on human body and environment, belongs to a safe, environment-friendly and energy-saving product, and meets the requirements of safety and environment protection.
Example eight:
the heating method of the electromagnetic heating device for the digitalized well site crude oil shown in the figure 2 comprises the following steps
The method comprises the following steps: electromagnetic heating device for installing digital well site crude oil
Placing a digital well site crude oil electromagnetic heating device at a self-positioning position, turning off an oil well of an oil pumping machine, staying for 8-12 minutes, connecting a crude oil input pipeline with an oil input pipe 2 through a crude oil inlet flange 1, and connecting an oil output pipe 11 with a crude oil output pipeline through a crude oil outlet flange 10; then, after opening the crude oil inlet flange 1 and the crude oil outlet flange 10, connecting a power supply, a load, a control line and a signal line, finishing wiring, checking and confirming the wiring correctness, starting the oil well of the oil pumping unit, and allowing crude oil of the oil well to flow in from the inlet flange 1 and flow out from the crude oil outlet flange 10;
step two: the electromagnetic heating device for the crude oil in the digital well site starts to work
When the first step is completed and the power transmission safety is confirmed, switching on a main power supply air switch; observing whether the variable frequency control cabinet 16 is normal or not, and whether abnormal actions exist or not; after the variable frequency control cabinet 16 works, the digital well site crude oil electromagnetic heating device starts to work;
step three: acquiring data and implementing control
After the second step is finished, the remote monitoring system controls the variable frequency control cabinet 16 by acquiring and sending pressure and temperature information in the electromagnetic heating body; when the temperature rises to the preset on-line temperature, the remote monitoring system sends a shutdown instruction, the variable frequency control cabinet 16 is shut down, and the digital well site crude oil electromagnetic heating device is in a state to be heated; when the temperature is reduced to a preset offline temperature, the remote monitoring system sends a starting instruction, the variable frequency control cabinet 16 is started, and the digital well site crude oil electromagnetic heating device starts to heat;
step four: digital well site crude oil electromagnetic heating device stops working
When the digital well site crude oil electromagnetic heating device breaks down or does not need to be heated, the remote monitoring system sends out an instruction, the variable frequency control cabinet 16 stops working, and the digital well site crude oil electromagnetic heating device stops heating.
Preferably, in the first step, the pumping unit well is shut down, and the residence time is 10 minutes.
When the temperature of the heater is increased to the designed upper line temperature, the heater is automatically stopped, and the temperature of the heater is reduced to the designed lower line temperature. The machine is started for twenty seconds, so that the temperature of the metal tube can reach more than 100 ℃, and the heat efficiency can reach more than 98%.
When the system is applied specifically, the remote monitoring system can also realize a remote monitoring function, is equipped with a field real-time low-temperature and high-temperature alarm function and realizes unattended operation.
In summary, the organic arrangement of the remote monitoring system which is used for heating the electromagnetic heating body by the crude oil passing through the electromagnetic heating body, is connected with the electromagnetic heating body through the electric wire and is used for changing the frequency of the input power frequency power supply, is connected with the variable frequency control cabinet through the electric signal and is used for receiving and sending the electric signal and controlling the start and stop of the variable frequency control cabinet provides the crude oil heating device and the heating method which can carry out non-heat source one-way internal heating and have high thermal efficiency, safety, environmental protection and energy saving; the invention has the characteristics of high electric heating efficiency, low failure rate, simple and convenient maintenance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. An electromagnetic heating device of digital well site crude oil is characterized in that: comprises that
The electromagnetic heating body is used for heating the crude oil passing through the electromagnetic heating body;
the variable frequency control cabinet (16), the variable frequency control cabinet (16) is connected with the electromagnetic heating body through a wire and is used for changing the frequency of the input power frequency power supply;
and the remote monitoring system is in electric signal connection with the variable frequency control cabinet and is used for receiving and sending electric signals and controlling the starting and stopping of the variable frequency control cabinet (16).
2. The electromagnetic heating apparatus of claim 1, wherein the apparatus further comprises: the electromagnetic heating body comprises an oil inlet pipe (2), an explosion-proof junction box (3), a heating shell (6), a heating unit and an oil outlet pipe (11); the oil inlet pipe (2) is connected with one end of the explosion-proof junction box (3), the end face of the other end of the explosion-proof junction box (3) is connected with a heating unit, the heating unit is connected in a heating shell (6), the upper part of the heating shell (6) is connected with an oil outlet pipe (11), a metal mesh cover is arranged at the joint of the oil outlet pipe (11) and the heating shell (6), and the heating shell (6) is connected with the other end of the explosion-proof junction box (3) through a connecting flange (4); the lower surface of the end of the heating shell (6) far away from the explosion-proof junction box (3) is provided with a clean discharge port (14).
3. The electromagnetic heating apparatus of claim 2, wherein the electromagnetic heating apparatus comprises: the heating unit comprises a wire protecting pipe (7), an electromagnetic coil (8) and a heating pipe (9); the electromagnetic coil (8) is coated with a wire protection pipe (7), the electromagnetic coil (8) coated with the wire protection pipe (7) is sleeved outside the heating pipe (9), the electromagnetic coil (8) is connected to the end face of the other end of the explosion-proof junction box (3), and the heating pipe (9) is communicated with the oil inlet pipe (2); the electromagnetic coil (8) is connected with the frequency conversion control cabinet (16) through an explosion-proof junction box (3) by an electric wire.
4. The electromagnetic heating apparatus of claim 2, wherein the electromagnetic heating apparatus comprises: the lower surface of the heating shell (6) is connected with a saddle (15), and the upper surface of the heating shell (6) is connected with a lifting ring (5).
5. The electromagnetic heating apparatus of claim 2, wherein the electromagnetic heating apparatus comprises: the metal mesh enclosure is a steel mesh enclosure.
6. The electromagnetic heating apparatus of claim 1, wherein the apparatus further comprises: the remote monitoring system comprises a control terminal, a temperature sensor (12) and a pressure sensor (13); the temperature sensor (12) and the pressure sensor (13) are connected with the heating shell (6), the temperature sensor (12) and the pressure sensor (13) are in electric signal connection with the control terminal, and the control terminal is in electric signal connection with the variable frequency control cabinet (16).
7. The electromagnetic heating apparatus of claim 1, wherein the apparatus further comprises: the total length of the electromagnetic heating body is 5000mm, the outer diameter is 400mm, and the pressure bearing capacity is 10 MPa.
8. The electromagnetic heating apparatus of claim 1, wherein the apparatus further comprises: the variable frequency control cabinet (16) comprises a control cabinet shell, a rectifying circuit, a variable frequency circuit and a control switch; the rectification circuit, the frequency conversion circuit and the control switch are connected in the shell; the input end of the rectifying circuit is connected with an external power supply, the output end of the rectifying circuit is connected with the input end of the frequency conversion circuit, and the output end of the frequency conversion circuit is connected with the electromagnetic heating body; the control switch and the frequency conversion circuit are in electric signal connection with a remote monitoring system; the rectification circuit is used for converting alternating-current voltage into direct-current voltage, and the frequency conversion circuit is used for converting the direct-current voltage into high-frequency voltage with the frequency of 20-40 KHz.
9. The heating method of the electromagnetic heating device for the digitalized well site crude oil is characterized by comprising the following steps
The method comprises the following steps: electromagnetic heating device for installing digital well site crude oil
Placing a digital well site crude oil electromagnetic heating device at a self-positioning position, turning off an oil well of an oil pumping machine, staying for 8-12 minutes, connecting a crude oil input pipeline with an oil inlet pipe (2) through a crude oil inlet flange (1), and connecting an oil outlet pipe (11) with a crude oil output pipeline through a crude oil outlet flange (10); then, after opening the crude oil inlet flange (1) and the crude oil outlet flange (10), connecting a power supply, a load, a control line and a signal line, finishing wiring, checking and confirming the wiring correctness, starting an oil well of the oil pumping unit, wherein crude oil in the oil well flows into the inlet flange (1) and flows out of the crude oil outlet flange (10);
step two: the electromagnetic heating device for the crude oil in the digital well site starts to work
When the first step is completed and the power transmission safety is confirmed, switching on a main power supply air switch; observing whether the variable frequency control cabinet (16) is normal or not, and if so, performing abnormal actions; after the variable frequency control cabinet (16) works, the digital well site crude oil electromagnetic heating device starts to work;
step three: acquiring data and implementing control
After the second step is finished, the remote monitoring system controls the variable frequency control cabinet (16) by acquiring and sending pressure and temperature information in the electromagnetic heating body; when the temperature rises to the preset on-line temperature, the remote monitoring system sends a shutdown instruction, the variable frequency control cabinet (16) is shut down, and the digital well site crude oil electromagnetic heating device is in a state to be heated; when the temperature is reduced to a preset offline temperature, the remote monitoring system sends a starting-up instruction, the variable frequency control cabinet (16) is started up, and the digital well site crude oil electromagnetic heating device starts heating;
step four: digital well site crude oil electromagnetic heating device stops working
When the digital well site crude oil electromagnetic heating device breaks down or does not need to be heated, the remote monitoring system sends an instruction, the variable frequency control cabinet (16) stops working, and the digital well site crude oil electromagnetic heating device stops heating.
10. The method of claim 8, wherein the heating step comprises the steps of: and in the first step, the oil well of the oil pumping machine is shut off, and the staying time is 10 minutes.
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| CN201910879710.9A CN110608370A (en) | 2019-09-18 | 2019-09-18 | Electromagnetic heating device and heating method for digital well site crude oil |
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| CN201910879710.9A CN110608370A (en) | 2019-09-18 | 2019-09-18 | Electromagnetic heating device and heating method for digital well site crude oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114666930A (en) * | 2022-03-04 | 2022-06-24 | 西安川秦石油科技有限公司 | Electromagnetic heating ball collecting device for oil pipeline and heating ball collecting method thereof |
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