Crude oil heating device for oil well port

Abstract

The utility model discloses an oil well port crude oil heating device which is characterized in that a solar hot air collector is connected end to end through a pipeline, a heat exchanger and a circulating fan are arranged on the end-to-end connecting pipeline, and the heat exchanger is connected with a water tank with a phase change energy accumulator; after the solar hot air collector obtains solar heat, the heat is stored in the water tank, and the heat is guided into the shell-and-tube heat exchanger through the water tank, so that crude oil is heated; an auxiliary heating device is further arranged in a matched mode, and continuous heating can be achieved in an auxiliary heating mode even in the state that solar energy is not good enough. The system is further provided with a photovoltaic panel in a matched mode, electric energy supplementation is achieved through the photovoltaic panel, and therefore the mains supply loss is reduced to the maximum extent, crude oil heating and thickening are achieved, the mobility of the crude oil is improved, more than 80% of energy can be supplied to the system through solar energy, and the system is particularly suitable for hilly areas or desert areas with strong illumination and lack of electric energy.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil well crude oil heating, in particular to an oil well port crude oil heating device. Background Art

[0002] As we all know, during the oil field pumping operation, after the crude oil is extracted from the oil well, its state is mostly thick liquid. When it is transported over long distances or to oil tanks, it will cause the following problems: 1. When the crude oil viscosity is high, the crude oil delivery pressure increases, and higher requirements are placed on the connection strength of the delivery pump and the delivery pipeline, which will lead to an increase in the delivery pump power and an increase in the pipeline breakage rate, and at the same time, it will also cause an increase in the operating costs of the crude oil production company; 2. When the crude oil viscosity increases, the flow rate of the crude oil in the pipeline will decrease. This decrease in flow rate will cause obvious wax deposition on the inner wall of the pipeline, making the inner cavity of the oil pipeline thinner and the flow rate lower, and it will also affect the pipeline strength when pressurized.

[0003] To address this drawback in the prior art, those skilled in the art have envisioned installing a heating device at the crude oil pipe outlet. However, this heating device is generally an electric heater, which locally heats the oil pipeline. This heating increases power consumption, and when multiple oil wells are installed and operated simultaneously, the annual electricity consumption is relatively large.

[0004] Based on the actual needs and feedback from oil production companies, it is very necessary for technical personnel in this field to design an oil well port heating device that can heat crude oil in a more environmentally friendly way, avoid the flow rate and flow reduction of crude oil during transportation due to the decrease in temperature, and minimize the impact of excessive oil pressure on transportation pipelines and equipment. Summary of the Invention

[0005] In view of the shortcomings of the existing technology mentioned above, the utility model proposes a crude oil heating device at the oil well port, which can heat and keep a certain amount of crude oil warm by installing a solar heating device at the oil well site. At the same time, it combines an energy storage device and electric heating to effectively reduce the cost of crude oil transportation and improve the efficiency of crude oil transportation through environmentally friendly energy.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A crude oil heating device at an oil well port comprises a solar hot air collector, which is connected end to end via a pipeline, a heat exchanger and a circulating fan are provided on the end-to-end connecting pipeline, and the heat exchanger is connected to a water tank; the water tank is connected to a shell and tube heat exchanger via a circulating pump, and the shell and tube heat exchanger is connected to the oil outlet of the oil well and the oil pipeline; a phase change accumulator is connected to the inside or outside of the water tank, and an auxiliary heater is also provided inside the water tank.

[0008] The auxiliary heater includes an electric heater and a fuel heater.

[0009] A solar photovoltaic panel is provided on the side of the solar hot air collector, and the solar photovoltaic panel is connected to the controller and the inverter. The inverter is connected to the energy storage module, and the inverter is also connected to the power unit. The power unit is connected to the control unit, and the power unit is connected to the circulating fan and the pump; the control unit is connected to the electrical equipment.

[0010] The solar hot air collector comprises multiple heat exchange modules, each comprising a header and a two-way pipe. After the modules are connected, the ventilation pipe on the first heat exchange module is connected to the middle header, and the ventilation pipe on the heat exchange module at the rear end is connected to the side header. The side headers are connected to the return air pipe via an equalizing pipe to achieve air circulation. This structure evenly distributes and guides airflow between the multiple heat exchange modules, improving the heat exchange efficiency of the solar hot air collector.

[0011] The shell and tube heat exchanger is arranged vertically and is a sealed tank body. Several through pipes are arranged vertically inside as the tube side. The top and bottom of the sealed tank body are both provided with partitions. The shell side is between the upper and lower partitions. The top of the tube side is connected to the wellhead, and the bottom of the tube side is connected to the external oil pipeline; the shell side is connected to the water tank.

[0012] The shell side is provided with a plurality of support plates. When multiple support plates are provided, adjacent support plates are arranged in a staggered manner. When the water tank is connected to the shell side, it is connected to the upper part of the top support plate and the lower part of the bottom support plate, respectively. At this time, the liquid flows in an S-shaped manner inside the shell side.

[0013] The present invention has the following beneficial effects: through the above design, the present invention connects the solar hot air collectors end to end through pipelines, and a heat exchanger and a circulating fan are provided on the end-to-end connecting pipelines, and the heat exchanger is connected to a water tank with a phase change accumulator; the solar hot air collector obtains solar heat and stores the heat in the water tank, and the heat is conducted to the shell and tube heat exchanger through the water tank to achieve heating and liquefaction of crude oil; the present invention is also equipped with an auxiliary heating device, which can achieve continuous heating through auxiliary heating even under poor solar energy conditions; the present invention is also equipped with photovoltaic panels, which realize electric energy subsidy through photovoltaic panels, thereby reducing the mains loss to the greatest extent, heating and reducing the viscosity of crude oil, and improving its fluidity. Solar energy can be used to complete more than 80% of the energy supply of this system, which is particularly suitable for hilly areas or desert areas with strong sunlight and lack of electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the system structure of the utility model;

[0016] Figure 2 Schematic diagram of the internal structure of the shell and tube heat exchanger;

[0017] In the figure, 1. Solar hot air collector, 10. Heat exchange module, 11. Double-pass pipe, 12. Header, 13. Air outlet pipe, 14. Equalizing pipe, 15. Return air pipe, 2. Water tank, 21. Electric heating pipe, 22. Water tank circulation pump, 23. Water tank water supply valve, 24. Water supply pipe, 25. Return pipe, 3. Phase change accumulator, 4. Hoist, 41. Oil well, 42. Oil outlet pipe, 43. Crude oil pump, 5. Shell and tube heat exchanger Device, 50, tank body, 51, support plate, 52, upper partition, 53, pipe side, 54, upper oil guide chamber, 55, oil inlet, 56, shell side, 57, lower partition, 58, lower oil guide chamber, 59, oil outlet, 6, wind-water heat exchanger, 61, circulating fan, 62, wind-water heat exchanger water pump, 7, inverter, 71, power unit, 72, control unit, 73, battery, 8, controller, 9, solar photovoltaic panel. DETAILED DESCRIPTION

[0018] The system structure disclosed in the present invention is relatively novel and simple, but the energy consumption reduction effect after the overall structure improvement is obvious. In order to more clearly reflect the improved effect of the present invention, the present invention is further described in detail through specific implementation methods below.

[0019] A crude oil heating device at an oil well port, as shown in the accompanying drawings, comprises a solar hot air collector 1, as shown in the accompanying drawings. Figure 1 As shown, the solar hot air collector 1 includes two sets of upper and lower heat exchange modules 10. The heat exchange modules 10 include a header 12 and a two-way pipe 11. After the two sets of heat exchange modules 10 are connected, the outlet pipe 13 on the lower heat exchange module 10 is connected to the middle header 12, and the equalizing pipe 14 on the upper heat exchange module 10 is connected to the side header 12. The side header 12 is connected to the return air pipe 15 through the equalizing pipe 14 to realize air circulation. The purpose of the above structural setting is to realize the equal distribution and diversion of air flow between multiple heat exchange modules 10, thereby improving the heat exchange efficiency of the solar hot air collector.

[0020] The solar hot air collector 1 is connected end to end through pipelines, and a wind-water heat exchanger 6 and a circulating fan 61 are provided on the air outlet pipe 13. The wind-water heat exchanger 6 is connected to the water tank 2; the water tank 2 is connected to the shell and tube heat exchanger 5 through the water tank circulation pump 22, and the shell and tube heat exchanger 5 is connected to the oil outlet 42 on the oil well 41; a phase change accumulator 3 is provided inside the water tank 2, and an auxiliary heater is also provided inside the water tank 2. The auxiliary heater includes an electric heater 21 and a fuel heater. In this embodiment, in order to avoid the safety hazards of crude oil caused by combustion, the electric heater 21 is selected for auxiliary heating of the water tank.

[0021] In order to improve the heat exchange efficiency, the utility model discloses a vertically arranged shell and tube heat exchanger 5, as shown in Figure 2, which includes a sealed tank body 50, in which a plurality of through pipes are vertically arranged as a tube side 53. The top and bottom of the sealed tank body 41 are respectively provided with an upper partition 52 and a lower partition 57, and the shell side 56 is between the upper partition 52 and the lower partition 57. The upper part of the upper partition 52 is provided with an upper oil guide chamber 54, and the lower part of the lower partition 57 is provided with a lower oil guide chamber 58. The top of the upper oil guide chamber 54 is connected to the oil inlet 55, and the lower oil guide chamber 58 is connected to the oil outlet 55. The sealed tank body 50 is connected to the water supply pipe 24 and the return pipe 25 in the shell side 56, and the water supply pipe 24 and the return pipe 25 are connected to the water tank 2. After such a structure is set up, oil can be injected into the tube side 53 through the crude oil pump 43. Under the action of pump pressure and gravity, the liquid exchanges heat with the shell side 56 through the tube side 53, thereby realizing the liquefaction of crude oil.

[0022] As a further technical extension, the shell side 56 is provided with a plurality of support plates 51. When multiple support plates 51 are provided, adjacent support plates 51 are staggered left and right. When the water tank 2 is connected to the shell side 56, it is connected to the upper portion of the topmost support plate and the lower portion of the bottommost support plate, respectively. In this way, the heated liquid flows in an S-shaped pattern within the shell side 56, increasing the residence time of the high-temperature liquid within the sealed tank body 50 and further improving heat exchange efficiency.

[0023] The utility model can collect heat energy through the solar hot air collector 1, and then heat the liquid inside the water tank 2 with the heated air flow in the wind-water heat exchanger 6. During this process, if the temperature in the water tank is too high, the heat energy can be stored in the phase change accumulator 3 inside the water tank 2. When the light is strong, the temperature in the water tank is too high, and the heat energy can be converted into storage in the phase change accumulator 3. At the same time, heat is supplied to the shell and tube heat exchanger 5. When the crude oil falls in the shell and tube heat exchanger 5, the hot water is used to reduce the viscosity and improve the fluidity of the crude oil.

[0024] At night or when the sunlight is weak, the circulating fan 61 and the wind-water heat exchanger water pump 62 are turned off. At this time, the phase change accumulator 3 releases heat in the water tank 2, and cooperates with the electric heating pipe 21 to achieve auxiliary heating. Temperature heating continues at the lowest mains power consumption state, continuously reducing the viscosity through hot water, and improving the fluidity of the crude oil.

[0025] Furthermore, the entire system must rely on external power for energy support or supplementation during operation. To reduce the use of mains electricity or to eliminate the use of mains electricity, the following improvements have been made:

[0026] A solar photovoltaic panel 9 is provided on the side of the solar hot air collector 1. The solar photovoltaic panel 9 is connected to the controller 8 and the inverter 7. The inverter 7 is connected to an energy storage module composed of several batteries 73, and AC / DC conversion is achieved through the inverter. The inverter 7 is also connected to a power unit 71, and the power unit 71 is connected to a control unit 72. The power unit 71 is connected to the circulating fan 61, the crude oil pump 43, the wind-water heat exchanger water pump 62, and the water tank circulating pump 22 to realize power supply; the control unit 72 is connected to the electric heating pipe 21 and the water tank water supply valve 23 to realize power supply.

[0027] With the above structural arrangement, the device achieves effective utilization of solar energy. The solar hot air collector 1 captures solar heat and stores it in a water tank 2. The water tank 2 then directs the heat to a shell-and-tube heat exchanger 5 to heat and liquefy the crude oil. The utility model is also equipped with an electric heating tube 21 and a phase-change accumulator 3 as auxiliary heating devices, enabling continuous heating even under suboptimal solar conditions. The utility model is also equipped with a solar photovoltaic panel 9, which provides electrical energy subsidies to minimize utility power losses, heating and thickening the crude oil, and improving its fluidity. The device can utilize solar energy to provide over 80% of the system's energy supply, making it particularly suitable for hilly or desert areas with strong sunlight and a shortage of electricity. It is an ideal crude oil heating device for oil well ports.

Claims

1. A crude oil heating device at an oil well port, characterized in that: It includes a solar hot air collector, which is connected end to end through a pipeline, and a heat exchanger and a circulating fan are arranged on the end-to-end connecting pipeline, and the heat exchanger is connected to a water tank; the water tank is connected to a shell and tube heat exchanger through a circulating pump, and the shell and tube heat exchanger is connected to the oil outlet of the oil well and the oil pipeline; the water tank is connected to a phase change accumulator inside or outside, and an auxiliary heater is also arranged inside the water tank.

2. The crude oil heating device at the oil well port according to claim 1, characterized in that: The auxiliary heater includes an electric heater and a fuel heater.

3. The crude oil heating device at the oil well port according to claim 1, characterized in that: A solar photovoltaic panel is arranged on the side of the solar hot air collector, and the solar photovoltaic panel is connected to a controller and an inverter, and the inverter is connected to an energy storage module and a power unit, and the power unit is connected to a control unit, and the power unit is connected to a circulating fan and a pump; and the control unit is connected to electrical equipment.

4. The crude oil heating device at the oil well port according to claim 1, characterized in that: The solar thermal air collector includes multiple groups of heat exchange modules, and the heat exchange modules include headers and double-pass pipes. After the multiple groups of heat exchange modules are connected, the ventilation pipe is connected to the middle header on the first heat exchange module, and the ventilation pipe is connected to the side header on the heat exchange module arranged at the tail end. The side header is connected to the return air pipe through an equalizing pipe.

5. The crude oil heating device at the oil well port according to claim 1, characterized in that: The shell and tube heat exchanger is arranged vertically, and is a sealed tank body, in which a plurality of through pipes are arranged vertically inside as a tube side. The top and bottom of the sealed tank body are both provided with partitions, and the shell side is between the upper and lower partitions. The top of the tube side is connected to the wellhead, and the bottom of the tube side is connected to the external oil pipeline; the shell side is connected to the water tank.

6. The crude oil heating device at the oil well port according to claim 5, characterized in that: A plurality of support plates are arranged inside the shell side. When a plurality of support plates are arranged, adjacent support plates are arranged in a left-right staggered manner.

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