CN117091301A - Oilfield crude oil heating system based on solar thermal collection coupling multiple energy sources for heating - Google Patents
Oilfield crude oil heating system based on solar thermal collection coupling multiple energy sources for heating Download PDFInfo
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- CN117091301A CN117091301A CN202310883133.7A CN202310883133A CN117091301A CN 117091301 A CN117091301 A CN 117091301A CN 202310883133 A CN202310883133 A CN 202310883133A CN 117091301 A CN117091301 A CN 117091301A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0208—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/10—Arrangements for storing heat collected by solar heat collectors using latent heat
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- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
An oilfield crude oil heating system based on solar heat collection coupling multiple energy heating in the technical field of crude oil heating comprises a solar heat collection unit, a thermal expansion buffer tank, a multi-energy coupling heat storage device, an oilfield associated gas environment-friendly combustion module, an electric heating device, a heat exchange device, a heat utilization unit, a multiple energy coupling heat supply module, a heat conduction oil pump, an intelligent temperature measurement control unit and a valve. The invention takes clean and renewable solar energy as a main heat source for crude oil heat tracing, an electric heater as an auxiliary heat source, and simultaneously comprehensively regulates and controls geothermal energy, VOCs treatment, oil well casing gas, heating furnaces and other energy sources for coupling complementary heat supply, the heat energy passes through a multi-energy coupling heat storage device to coordinate the supply and the demand of the system heat energy, and finally the crude oil heating is completed through a heat exchange device. The invention achieves the purposes of coupling utilization of various energy sources, energy conservation, environmental protection, interdependence and high-efficiency utilization of energy to heat crude oil in an oil field by collecting light energy and heat energy.
Description
Technical Field
The invention relates to a heating system in the technical field of crude oil heating, in particular to an oilfield crude oil heating system which can be used by coupling multiple energy sources and is based on solar heat collection coupling multiple energy sources for heating.
Background
Crude oil extracted from an oil well is generally required to be distributed to a specific application position after being conveyed by a long pipeline, but the crude oil has the defects of high solidifying point, high viscosity, poor fluidity and the like at normal temperature, so that in the process of conveying the crude oil, the crude oil conveying pipeline is required to be heated, the viscosity of the crude oil is reduced, and the conveying capacity and the conveying efficiency of the pipeline are improved. At present, the traditional crude oil heat tracing system adopts a crude oil pipeline heat tracing mode by combusting crude oil, the mode not only can waste 30% -40% of total energy of the crude oil, but also can cause serious pollution to surrounding atmospheric environment due to waste gas generated after the crude oil is combusted.
As the clean renewable energy sources widely applied at present, solar energy has the advantages of universality, innocuity, large reserve capacity, long service life and the like, so the solar heat collector is selected as the main heat source of the system, and the design of the system not only reduces the energy consumption, but also greatly reduces the pollution to the atmosphere environment. The solar heat collector commonly used at present comprises a flat plate type heat collector and a vacuum tube heat collector. Compared with a vacuum tube heat collector, the flat plate heat collector has the advantages of simple structure, reliable operation, proper cost, strong pressure bearing capacity, large heat collecting area and the like.
In the prior art, there is no proprietary technology that combines solar energy with crude oil heating.
Disclosure of Invention
The invention provides an oilfield crude oil heating system based on solar heat collection coupling multiple energy heating, which aims at the defects of the prior art, and the oilfield crude oil heating system uses clean and renewable solar energy as a main heat source for crude oil heat tracing, an electric heater as an auxiliary heat source, and simultaneously comprehensively regulates and controls geothermal energy, VOCs treatment (waste heat exchange), oil well casing gas, a heating furnace and other multiple energy coupling complementary heat supply, wherein the thermal energy is subjected to the multiple energy coupling heat storage device to coordinate the supply and the demand of the system thermal energy, and finally the crude oil heating is completed through the heat exchange device.
The invention is realized by the following technical scheme that the system comprises a solar heat collecting unit, a thermal expansion buffer tank, a multi-energy coupling heat storage device, an oilfield associated gas environment-friendly combustion module, an electric heating device, a heat exchange device, a heat using unit, a multi-energy coupling heat supply module, a heat conducting oil pump, a heat collecting unit heat conducting medium inflow pipe, a heat collecting unit heat conducting medium outflow pipe, a first heat exchange device heat conducting medium inflow pipe, a second heat exchange device heat conducting medium inflow pipe, a heat conducting medium return pipe, a heat using unit circulation pipe, a combustion module circulation pipe, a heat supply module circulation pipe, a buffer tank connection pipe, a first intelligent temperature measurement control unit, a second intelligent temperature measurement control unit, a first valve, a second valve, a third valve, a fourth valve and a fifth valve. The liquid outlet of the heat-conducting medium outflow pipe of the heat-collecting unit is communicated with one liquid inlet of the multi-energy coupling heat storage device; the liquid outlet of the multi-energy coupling heat storage device is communicated with the liquid inlet of the second intelligent temperature measurement control unit, and the two liquid outlets of the second intelligent temperature measurement control unit are respectively communicated with the liquid inlets of the heat conduction medium inflow pipe of the first heat exchange device and the heat conduction medium inflow pipe of the second heat exchange device; the liquid outlets of the heat-conducting medium inflow pipes of the first heat exchange device and the second heat exchange device are respectively communicated with two liquid inlets of the heat exchange device, and the liquid outlet of the heat exchange device is communicated with the liquid inlet of the heat-conducting oil pump; two liquid outlets of the heat conduction oil pump are respectively connected with liquid inlets of a heat conduction medium inflow pipe and a heat conduction medium return pipe of the heat collection unit; the liquid outlet of the heat-conducting medium inflow pipe of the heat collecting unit is communicated with the liquid inlet of the heat-conducting medium of the solar heat collecting unit, and the liquid outlet of the heat-conducting medium return pipe is communicated with the other liquid inlet of the multi-energy coupling heat storage device; one end of the buffer tank connecting pipe is communicated with a heat conducting medium circulating pipe at the bottom of the solar heat collecting unit, and the other end of the buffer tank connecting pipe is communicated with a thermal expansion buffer tank. The heat utilization unit is connected with the heat exchange device through a heat utilization unit circulating pipe, the oilfield associated gas environment-friendly combustion module is connected with the multi-energy coupling heat storage device through a combustion module circulating pipe, and the multi-energy coupling heat supply module is connected with the multi-energy coupling heat storage device through a heat supply module circulating pipe. The first valve is connected in series on the buffer tank connecting pipe, the first intelligent temperature measurement control unit and the second valve are connected in series on the heat-conducting medium outflow pipe of the heat collecting unit in sequence along the heat-conducting medium flowing direction, the third valve and the electric heating device are connected in series on the heat-conducting medium inflow pipe of the first heat exchange device in series along the heat-conducting medium flowing direction, the fourth valve is connected in series on the heat-conducting medium inflow pipe of the second heat exchange device, and the fifth valve is connected in series on the heat-conducting medium return pipe. The multi-energy coupling heat storage device is internally provided with a phase change material and is used for storing heat from the solar heat collection unit, the oilfield associated gas environment-friendly combustion module and the multi-energy coupling heat supply module; the first intelligent temperature measurement control unit is electrically connected with the first valve, the second valve and the fifth valve through wire harnesses, and the second intelligent temperature measurement control unit is electrically connected with the third valve, the fourth valve and the electric heating device through wire harnesses.
Further, in the invention, the heat conducting medium is heat conducting oil, and the phase change material is aluminum ammonium sulfate dodecahydrate.
Still further, in the present invention, the solar heat collecting unit includes a glass plate, a heat absorbing coating, a heat insulating layer, a copper pipe through which a heat conducting medium flows to absorb solar heat; the solar heat collection unit is arranged in the right south according to an installation inclination angle of 45 degrees, so that the system achieves the highest efficiency in a region with the latitude of 45 degrees.
Furthermore, in the invention, the internal structure of the multi-energy coupling heat storage device adopts a shell-and-tube heat exchanger, the aluminum ammonium sulfate dodecahydrate is encapsulated in a shell side, and the heat conduction oil flows in the tube side.
Still further, in the present invention, the heat exchange means is a shell-and-tube heat exchanger in which the hot fluid is a heated heat transfer medium and the cold fluid is crude oil produced by using a field in the heat unit.
Still further, in the present invention, the plurality of energy coupled heating modules include, but are not limited to, geothermal energy devices, VOCs remediation devices, oil well casing gas devices, heating furnace devices.
Furthermore, in the invention, the multi-energy coupling heat storage device, the oilfield associated gas environment-friendly combustion module, the electric heating device, the heat exchange device, the heat utilization unit, the multi-energy coupling heat supply module and the heat conduction oil pump are integrated in the customized container.
In the invention, the solar heat collector in the solar heat collector unit is a flat plate type solar heat collector, the arrangement direction is the forward and the backward direction, the installation inclination angle is 45 degrees, the system has highest efficiency when running all the year round in the area with the latitude of 45 degrees, and the solar heat collector unit can transfer the heat absorbed by the flat plate type solar heat collector to the heat transfer medium. The thermal expansion buffer tank has the function of protecting the system when the temperature of the heat conducting medium in the system is increased, the density of the heat conducting medium is reduced when the temperature is increased, the volume is increased, and the thermal expansion buffer tank starts to work when the pressure of the heat conducting medium in the system is increased, so that the redundant heat conducting medium is absorbed. The multi-energy coupling heat storage device can absorb and store heat energy after various energy sources are converted, and the heat energy collected by the solar heat collection unit and heat energy obtained after the oilfield associated gas environment-friendly combustion module burns and the like release the stored heat when the temperature of a heat conducting medium in the system is low, so that the purposes of peak staggering adjustment, environmental protection and energy saving are achieved. The environment-friendly combustion module for the oilfield associated gas takes the associated gas generated in the oilfield exploitation process as fuel, the whole combustion process reaches the environment-friendly requirement, the pollutant emission accords with the national standard, and the heat released by combustion is used for heating the heat-conducting medium. The electric heating device can directly convert electric energy into heat energy for heating the heat conducting medium, and the maximum power of the electric heating device can meet the requirement of heating crude oil of the whole system. The heat exchange device is a shell-and-tube heat exchanger and has the characteristic of stable operation. The hot fluid is a heat conducting medium heated by components such as a solar heat collecting unit, and the cold fluid is crude oil obtained by exploiting an oil field in the heat collecting unit. And in the multi-energy coupling heat supply module, other energy sources can be added by a user according to the actual production condition in a self-defined way to heat crude oil, such as geothermal energy, VOCs treatment (waste heat exchange), oil well casing gas, a heating furnace and the like. The circulating working media in the solar heat collection unit, the heat exchange device, the electric heating device and the multi-energy coupling heat storage device are all heat conduction oil, and the cold fluid heated in the heat exchange device is crude oil obtained by oil field exploitation.
In the invention, the energy storage module, the auxiliary energy module, the circulating system and the operating system are integrated in the customized container, and the container body can be suitable for various application scenes and is convenient for design, manufacture and transportation. The selected flat plate type heat collector structure comprises a glass plate, a heat absorption coating, a heat preservation layer, a copper pipe and the like, wherein a heat conducting medium flows through the copper pipe to absorb solar heat, and the flat plate type heat collector has large heat collection area and reliable operation. The heating mode is indirect heating, the heat conducting medium is heat conducting oil, and the heat unit exchanges heat with the heat conducting oil through the shell-and-tube heat exchanger. The arrangement mode of the solar heat collection field is to take 45 degrees as the installation inclination angle of the heat collection plate so as to ensure the annual operation. The inlet temperature of the crude oil before entering the heat tracing system is 10-20 ℃, the outlet temperature of the crude oil after being heated by the system is 60-70 ℃, and the mass flow of the crude oil is 9.6t/d. The heat collector has different received radiation intensities under different seasons such as spring and autumn, summer and winter, the solar radiation efficiency eta=85% of the selected solar heat collector is used for determining the heat collecting area under different powers through thermal calculation. The thermal expansion buffer tank is arranged at the side of the first valve, and can temporarily store heat conduction oil reaching rated temperature from the heat collection plate, so that the heat conduction oil in the system can keep rated flow to operate. The intelligent temperature measurement control unit is used for measuring the temperature of the heat conduction oil to control the opening and closing of valves in front of each module, and the inlet temperature of the heat conduction oil is designed to be 60 ℃, the outlet temperature of the heat conduction oil is designed to be 90 ℃, and the inlet-outlet temperature difference of the heat conduction oil is designed to be 30 ℃. The multi-energy coupling heat storage device can comprehensively regulate and control geothermal energy, VOCs (waste heat exchange), oil well casing gas, heating furnaces and other multi-energy coupling complementary heat supply. The internal structure of the heat storage tank adopts a shell-and-tube heat exchanger to exchange heat, aluminum ammonium sulfate dodecahydrate is packaged in a shell side, heat conduction oil flows in the tube side, and heat storage and heat exchange in summer and heat extraction and heat exchange at night are carried out on the heat storage tank. The auxiliary electric heating device is arranged at the heat conducting oil outlet end of the multi-energy coupling heat storage device, the auxiliary electric heating device is not required to be started if the heat conducting oil reaches the rated temperature, and the auxiliary electric heating device is started to be heated to the rated temperature if the temperature does not reach the requirement.
When the system is required to run in a standard running state (good illumination condition), the heat provided by the solar heat collector can ensure that the outlet temperature of a medium (crude oil) can reach 60-70 ℃; when the auxiliary heating system (the electric heater device) operates in a non-standard operating state (weak light, cloudy days or nighttime), the auxiliary heating system (the electric heater device) can automatically provide thermal compensation according to system control, the solar heat collector and the electric heater device jointly provide heat for a crude oil pipeline, and the medium (crude oil) outlet temperature can be ensured to be not lower than a set temperature for operation.
Compared with the prior art, the invention has the following beneficial effects: the invention has reasonable design, and can achieve the purposes of coupling and utilizing various energy sources, saving energy, protecting environment, interdependence and heating the crude oil of the oil field by efficiently utilizing energy through collecting the light energy and the heat energy. Compared with the traditional crude oil heat tracing system, the skid-mounted crude oil photo-thermal heating system has the advantages of low energy consumption, small environmental pollution and the like, and the system not only greatly reduces the economic cost of crude oil heat tracing, but also meets the development requirements of green and environment protection in the new era.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
wherein, 1, a solar heat collecting unit, 2, a thermal expansion buffer tank, 3, a multi-energy coupling heat storage device, 4, an oilfield associated gas environment-friendly combustion module, 5, an electric heating device, 6, a heat exchange device, 7, a heat using unit, 8, a multi-energy coupling heat supply module, 9, a first intelligent temperature measurement control unit, 10, a second intelligent temperature measurement control unit, 11, a first valve, 12, a second valve, 13 and a third valve, 14, fourth valve, 15, fifth valve, 16, heat conduction oil pump, 17, heat collecting unit heat conduction medium inflow pipe, 18, heat collecting unit heat conduction medium outflow pipe, 19, buffer tank connecting pipe, 20, first heat exchange device heat conduction medium inflow pipe, 21, second heat exchange device heat conduction medium inflow pipe, 22, heat using unit circulating pipe, 23, combustion module circulating pipe, 24, heat supplying module circulating pipe, 25, heat conduction medium return pipe.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings, and the embodiments and specific operation procedures of the present invention are given by this embodiment on the premise of the technical solution of the present invention, but the protection scope of the present invention is not limited to the following embodiments.
Examples
As shown in fig. 1, the invention comprises a solar heat collecting unit 1, a thermal expansion buffer tank 2, a multi-energy coupling heat storage device 3, an oilfield associated gas environment-friendly combustion module 4, an electric heating device 5, a heat exchange device 6, a heat utilization unit 7, a multi-energy coupling heat supply module 8, a first intelligent temperature measurement control unit 9, a second intelligent temperature measurement control unit 10, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, a fifth valve 15, a heat conduction oil pump 16, a heat collecting unit heat conduction medium inflow pipe 17, a heat collecting unit heat conduction medium outflow pipe 18, a buffer tank connecting pipe 19, a first heat exchange device heat conduction medium inflow pipe 20, a second heat exchange device heat conduction medium inflow pipe 21, a heat utilization unit circulation pipe 22, a combustion module circulation pipe 23, a heat supply module circulation pipe 24 and a heat conduction medium return pipe 25; the liquid outlet of the heat-conducting medium of the solar heat-collecting unit 1 is communicated with the liquid inlet of the heat-collecting unit heat-conducting medium outflow pipe 18, and the liquid outlet of the heat-collecting unit heat-conducting medium outflow pipe 18 is communicated with one liquid inlet of the multi-energy coupling heat storage device 3; the liquid outlet of the multi-energy coupling heat storage device 3 is communicated with the liquid inlet of the second intelligent temperature measurement control unit 10, and the two liquid outlets of the second intelligent temperature measurement control unit 10 are respectively communicated with the liquid inlets of the first heat exchange device heat conducting medium inflow pipe 20 and the second heat exchange device heat conducting medium inflow pipe 21; the liquid outlets of the heat-conducting medium inflow pipe 20 of the first heat exchange device and the heat-conducting medium inflow pipe 21 of the second heat exchange device are respectively communicated with two liquid inlets of the heat exchange device 6, and the liquid outlet of the heat exchange device 6 is communicated with the liquid inlet of the heat-conducting oil pump 16; two liquid outlets of the heat conduction oil pump 16 are respectively connected with liquid inlets of a heat conduction medium inflow pipe 17 and a heat conduction medium return pipe 25 of the heat collection unit; the liquid outlet of the heat-collecting unit heat-conducting medium inflow pipe 17 is communicated with the heat-conducting medium liquid inlet of the solar heat-collecting unit 1, and the liquid outlet of the heat-conducting medium return pipe 25 is communicated with the other liquid inlet of the multi-energy coupling heat storage device 3; one end of a buffer tank connecting pipe 19 is communicated with a heat conducting medium circulating pipe at the bottom of the solar heat collecting unit, and the other end of the buffer tank connecting pipe 19 is communicated with a thermal expansion buffer tank 2; the heat utilization unit 7 is connected with the heat exchange device 6 through a heat utilization unit circulating pipe 22, the oilfield associated gas environment-friendly combustion module 4 is connected with the multi-energy coupling heat storage device 3 through a combustion module circulating pipe 23, and the multi-energy coupling heat supply module 8 is connected with the multi-energy coupling heat storage device 3 through a heat supply module circulating pipe 24; the first valve 11 is connected in series with the buffer tank connecting pipe 19, the first intelligent temperature measurement control unit 9 and the second valve 12 are sequentially connected in series with the heat-conducting medium outflow pipe 18 of the heat collecting unit along the heat-conducting medium flowing direction, the third valve 13 and the electric heating device 5 are sequentially connected in series with the heat-conducting medium inflow pipe 20 of the first heat exchange device along the heat-conducting medium flowing direction, the fourth valve 14 is connected in series with the heat-conducting medium inflow pipe 21 of the second heat exchange device, and the fifth valve 15 is connected in series with the heat-conducting medium return pipe 25; the first intelligent temperature measurement control unit 9 is electrically connected with the first valve 11, the second valve 12 and the fifth valve 15 through wire harnesses, and the second intelligent temperature measurement control unit 10 is electrically connected with the third valve 13, the fourth valve 14 and the electric heating device 5 through wire harnesses; the second valve 12 is in communication with the fifth valve 15, one being closed when the other is open.
The intelligent control system adopts a modularized design, has exquisite structure, has a multi-energy complementary precise regulation and control software program in the intelligent control system, and can realize the rapid switching and the reliable regulation and control in the application process of the multi-energy coupling system.
In the present invention, the solar heat collecting unit 1 is of the PRE-EA type and has a heat collecting area of 2m 2 The inner part is provided with 8 copper calandria, the thickness of the heat absorbing plate core is 72mm, and the system forms a solar heat collecting field by combining a certain number of single flat plate type solar heat collectors. When the solar heat collecting device operates in extreme weather in winter, the installation angle of the solar heat collecting plate can be automatically adjusted according to actual requirements, and the occupied area of a heat collecting field is reduced.
In the invention, the first valve 11 is arranged between the bottom of the solar heat collection unit 1 and the thermal expansion buffer tank 2, and the first valve 11 is controlled to be opened and closed by intelligently measuring the temperature to control the measurement of the temperature of the heat conduction oil by the first unit 9. The thermal expansion buffer tank 2 is arranged at the side of the first valve 11, and can temporarily store the heat conduction oil reaching the rated temperature from the heat collecting plate 1, so that the heat conduction oil in the system can keep the rated flow to operate. The multi-energy coupling heat storage device 3 is arranged right behind the first intelligent temperature measurement control unit 9, the first intelligent temperature measurement control unit 9 controls the opening and closing of the second valve 12, and heat exchange and heat storage can be carried out on redundant heat of the heat conduction oil and the phase change material. The internal structure of the heat storage tank 3 adopts a shell-and-tube heat exchanger to exchange heat, aluminum ammonium sulfate dodecahydrate is packaged in a shell side, heat conduction oil flows in the tube side, and heat storage and heat exchange in summer and heat extraction and heat exchange in night are carried out on the heat conduction oil.
The oilfield associated gas environment-friendly combustion module 4 is arranged at the side of the multi-energy coupling heat storage device 3, and the multi-energy coupling heat supply module 8 is arranged right behind the multi-energy coupling heat storage device 9 and is used for auxiliary heat supply when sunshine is insufficient in winter. The auxiliary electric heating device 5 is arranged at the heat conducting oil outlet end of the multi-energy coupling heat storage device 3, and is not required to be started if the heat conducting oil reaches the rated temperature, and is started to be heated to the rated temperature if the temperature does not reach the requirement.
The first intelligent temperature measurement control unit 9 is used for measuring the temperature of the heat conduction oil so as to control the opening and closing of valves in front of each module, the inlet temperature of the heat conduction oil is designed to be 60 ℃, the outlet temperature is designed to be 90 ℃, and the inlet-outlet temperature difference of the heat conduction oil is designed to be 30 ℃.
When the solar heat collector operates in a standard operating state (good illumination condition), the heat provided by the solar heat collector 1 can ensure that the outlet temperature of a heat conducting medium (heat conducting oil) can reach 90 ℃; when the auxiliary heating system (the electric heater device 5) operates in a non-standard operation state (weak light, cloudy days or nighttime), the auxiliary heating system (the electric heater device 5) can automatically provide thermal compensation according to system control, the solar heat collector 1 and the electric heater device 5 jointly provide heat for a crude oil pipeline, and the medium (crude oil) outlet temperature can be ensured to be not lower than a set temperature for operation. The system achieves the purposes of coupling utilization of various energy sources, energy conservation, environmental protection, interdependence and high-efficiency utilization of energy to heat crude oil in an oil field by collecting light energy and heat energy.
In the photo-thermal conversion process, sunlight irradiates the solar heat collector 1 to heat low-temperature fluid in the heat exchange tube therein, then, high-temperature fluid working medium flows out from an outlet of the solar heat collector 1, flows into the multi-energy coupling heat storage device 3 through the first intelligent temperature measurement control unit 9 and the second valve 12, and undergoes heat exchange to enable phase change of phase change materials in the multi-energy coupling heat storage device 3 to complete heat storage. In the electrothermal conversion process, electric energy is converted into heat energy through the electric heater device 5, the heat conducting medium flowing through the electric heater device 5 obtains the heat energy, the temperature is raised, electrothermal conversion is realized, and the heat conducting medium output through the electric heater device 5 is input into the heat exchange device 6. In the process of conversion of chemical energy and heat energy, the oil field associated gas in the oil field associated gas environment-friendly combustion module 4 is used as fuel for combustion, the heat energy obtained through combustion can be stored in the multi-energy coupling heat storage device 3, and the phase change material in the multi-energy coupling heat storage device 3 is subjected to phase change through heat exchange, so that heat storage is completed. In the heat energy utilization process, the high-temperature fluid flowing out of the output end of the solar heat collector 1 flows into the multi-energy coupling heat storage device 3, the high-temperature fluid flowing out of the output end of the oilfield associated gas environment-friendly combustion module 4 flows into the multi-energy coupling heat storage device 3, the high-temperature fluid at the output end of the multi-energy coupling heat storage device 3 flows into the heat exchange device 6 to exchange heat with low-temperature crude oil in the heat exchange device 6, and then the high-temperature crude oil flows out of the output end of the heat exchange device 6, so that the crude oil temperature is increased, the viscosity is reduced, and the crude oil transportation is facilitated.
The solar heat collection unit 1 is installed in the right south according to the installation inclination angle of 45 degrees, so that the system achieves the highest efficiency in the area with the latitude of 45 degrees.
The invention takes clean and renewable solar energy as a main heat source of crude oil heat tracing, an electric heater as an auxiliary heat source, and simultaneously comprehensively regulates and controls geothermal energy, VOCs (waste heat exchange), oil well casing gas, heating furnaces and other energy sources to couple and complement heat supply, the heat energy passes through a multi-energy coupling heat storage device to coordinate the supply and the demand of the system heat energy, and finally the crude oil heating is completed through the heat exchange device. The system has low energy consumption and little pollution, greatly reduces the economic cost of crude oil heat tracing, and meets the development requirements of green and environment protection in the new era.
When the system operates under the working condition in summer, the heat provided by the designed flat-plate solar heat collection field can meet the requirements of crude oil heat tracing, and an electric heater device is not required to be started; when the main pipeline finishes circulation at night, the temperature of the heat conduction oil is lower, when the solar radiation intensity is weaker in the morning, the temperature of the flat plate type heat collector is lower, the temperature difference between the heat conduction oil in the pipeline and the heat conduction oil in the flat plate type solar heat collector is detected, if the temperature difference exceeds 8-10 ℃, the first valve 11, the second valve 12 and the third valve 13 are closed, the fourth valve 14 and the fifth valve 15 are opened, and heat is taken through the multi-energy coupling heat storage device 3, so that the heat conduction oil reaches the set heat exchange temperature; when the intensity of solar radiation is enhanced, through the intelligent detection system, when the outlet temperature of the heat exchanger is detected to be more than or equal to 60 ℃, the first valve 11, the second valve 12 and the fourth valve 14 are opened, the third valve 13 and the fifth valve 15 are closed, at the moment, excessive hot fluid flows into the thermal expansion tank 2 and supplies heat to the multi-energy coupling heat storage device 3, and the heat conduction oil reaches the rated heat exchange temperature, so that crude oil is subjected to heat tracing.
When the system operates under the condition of insufficient illumination in the morning in winter, the temperature of the heat conduction oil heated by the solar heat collector 1 can not completely meet the demand of crude oil heat tracing, and the power of the electric heater 5 is automatically regulated through the first intelligent temperature measurement control unit 9 and the second intelligent temperature measurement control unit 10, so that the heat conduction oil temperature is jointly raised by the solar heat collector 1, the multi-energy coupling heat storage device 3 and the electric heater 5 to be the crude oil pipeline heat tracing; when the system operates under the condition of sufficient illumination in winter, the solar radiation quantity is enhanced, the intelligent detection system detects that the outlet temperature of the flat plate type heat collector exceeds 90 ℃, the system can operate according to the working condition in daytime in summer, if extreme weather is met in winter, the temperature of the heat collection field can not reach the set temperature, the electric heating device is fully opened all the time, and heat storage tank and pipeline heat preservation measures are taken.
The operation flow under the working condition of spring and autumn refers to the working condition of winter.
The invention mainly uses the solar heat collector 1 to absorb the solar radiation energy and then heat the heat transfer medium (heat conduction oil), and the heated high-temperature heat transfer medium (heat conduction oil) heats the crude oil in the pipeline through the heat exchanger (shell-and-tube). Under the working condition of insufficient illumination or night, the electric heater 5 is used as an auxiliary heat source to supply heat for the crude oil pipeline together with the solar heat collector 1 and the multi-energy coupling heat storage device 3.
The invention takes clean and renewable solar energy as a main heat source for crude oil heat tracing, the electric heater 5 is taken as an auxiliary heat source, and simultaneously, the geothermal energy, the VOCs treatment (waste heat exchange), the oil well casing gas, the heating furnace and other various energy sources are comprehensively regulated and controlled to couple and complementarily supply heat; the invention achieves the purposes of coupling utilization of various energy sources, energy conservation, environmental protection, interdependence and high-efficiency utilization of energy to heat crude oil in an oil field by collecting light energy and heat energy.
The skid-mounted solar heating device (photo-thermal device) is an intelligent heating device integrating energy conservation, environmental protection, green synergy and advanced intelligent control technology, and the design and the manufacture of the product completely meet the requirements of various national standards. The multi-energy coupling heat supply system based on the heat source can be widely applied to the scenes of industry, agriculture, civil heating, pipeline heating, tank body temperature maintenance, heating furnace (boiler) replacement and the like, and has more obvious social and economic benefit advantages in the aspects of comprehensive utilization of waste heat and fossil energy replacement in the green electricity consumption and VOCs treatment process.
The serial products of the invention adopt modularized design, have the advantages of exquisite structure, simple process, high thermal efficiency, simple installation, small operation noise, precise control, energy conservation, environmental protection and the like, and the intelligent control system is internally provided with a multi-energy complementary precise regulation and control software program, so that the rapid switching and the reliable regulation and control in the application process of the multi-energy coupling system can be realized, the compliance degree of the simultaneous complementary application of various energies is ensured, the control precision and the efficiency are higher, and the heat supply process is more stable and precise.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (7)
1. The oilfield crude oil heating system based on solar heat collection coupling multiple energy heating is characterized by comprising a solar heat collection unit, a thermal expansion buffer tank, a multi-energy coupling heat storage device, an oilfield associated gas environment-friendly combustion module, an electric heating device, a heat exchange device, a heat utilization unit, multiple energy coupling heat supply modules, a heat conduction oil pump, a heat collection unit heat conduction medium inflow pipe, a heat collection unit heat conduction medium outflow pipe, a first heat exchange device heat conduction medium inflow pipe, a second heat exchange device heat conduction medium inflow pipe, a heat conduction medium backflow pipe, a heat utilization unit circulation pipe, a combustion module circulation pipe, a heat supply module circulation pipe, a buffer tank connection pipe, a first intelligent temperature measurement control unit, a second intelligent temperature measurement control unit, a first valve, a second valve, a third valve, a fourth valve and a fifth valve;
the liquid outlet of the heat-conducting medium outflow pipe of the heat-collecting unit is communicated with one liquid inlet of the multi-energy coupling heat storage device; the liquid outlet of the multi-energy coupling heat storage device is communicated with the liquid inlet of the second intelligent temperature measurement control unit, and the two liquid outlets of the second intelligent temperature measurement control unit are respectively communicated with the liquid inlets of the heat conduction medium inflow pipe of the first heat exchange device and the heat conduction medium inflow pipe of the second heat exchange device; the liquid outlets of the heat-conducting medium inflow pipes of the first heat exchange device and the second heat exchange device are respectively communicated with two liquid inlets of the heat exchange device, and the liquid outlet of the heat exchange device is communicated with the liquid inlet of the heat-conducting oil pump; two liquid outlets of the heat conduction oil pump are respectively connected with liquid inlets of a heat conduction medium inflow pipe and a heat conduction medium return pipe of the heat collection unit; the liquid outlet of the heat-conducting medium inflow pipe of the heat collecting unit is communicated with the liquid inlet of the heat-conducting medium of the solar heat collecting unit, and the liquid outlet of the heat-conducting medium return pipe is communicated with the other liquid inlet of the multi-energy coupling heat storage device; one end of a buffer tank connecting pipe is communicated with a heat conducting medium circulating pipe at the bottom of the solar heat collecting unit, and the other end of the buffer tank connecting pipe is communicated with a thermal expansion buffer tank;
the heat utilization unit is connected with the heat exchange device through a heat utilization unit circulating pipe, the oilfield associated gas environment-friendly combustion module is connected with the multi-energy coupling heat storage device through a combustion module circulating pipe, and the multi-energy coupling heat supply module is connected with the multi-energy coupling heat storage device through a heat supply module circulating pipe;
the first valve is connected in series with the buffer tank connecting pipe, the first intelligent temperature measurement control unit and the second valve are sequentially connected in series with the heat-conducting medium outflow pipe of the heat collecting unit along the heat-conducting medium flowing direction, the third valve and the electric heating device are sequentially connected in series with the heat-conducting medium inflow pipe of the first heat exchange device along the heat-conducting medium flowing direction, the fourth valve is connected in series with the heat-conducting medium inflow pipe of the second heat exchange device, and the fifth valve is connected in series with the heat-conducting medium return pipe;
the multi-energy coupling heat storage device is internally provided with a phase change material and is used for storing heat from a solar heat collection unit, an oilfield associated gas environment-friendly combustion module and a plurality of energy coupling heat supply modules;
the first intelligent temperature measurement control unit is electrically connected with the first valve, the second valve and the fifth valve through wire harnesses, and the second intelligent temperature measurement control unit is electrically connected with the third valve, the fourth valve and the electric heating device through wire harnesses.
2. The oilfield crude oil heating system based on solar heat collection coupling multiple energy heating according to claim 1, wherein the heat conducting medium is heat conducting oil, and the phase change material is aluminum ammonium sulfate dodecahydrate.
3. The oilfield crude oil heating system based on solar heat collection coupling multiple energy heating according to claim 1, wherein the solar heat collection unit comprises a glass plate, a heat absorption coating, a heat preservation layer and a copper pipe, and a heat conduction medium flows through the copper pipe to absorb sunlight heat; the solar heat collection unit is arranged in the right south according to an installation inclination angle of 45 degrees, so that the system achieves the highest efficiency in a region with the latitude of 45 degrees.
4. The oilfield crude oil heating system based on solar heat collection and multi-energy heating according to claim 1, wherein the multi-energy coupling heat storage device adopts a shell-and-tube heat exchanger in an internal structure, aluminum ammonium sulfate dodecahydrate is packaged in a shell side, and heat conduction oil flows in the tube side.
5. The oilfield crude oil heating system based on solar heat collection coupling multiple energy heating according to claim 1, wherein the heat exchange device is a shell-and-tube heat exchanger, wherein the hot fluid is a heated heat conducting medium, and the cold fluid is crude oil extracted from an oilfield in a heat unit.
6. The oilfield crude oil heating system based on solar thermal collection coupled with multiple energy heating of claim 1, the multiple energy coupled heating modules including, but not limited to, geothermal energy devices, VOCs remediation devices, oil well casing gas devices, heating furnace devices.
7. The oilfield crude oil heating system based on solar heat collection coupling multiple energy heating of claim 1, wherein the multiple energy coupling heat storage device, the oilfield associated gas environment-friendly combustion module, the electric heating device, the heat exchange device, the heat utilization unit, the multiple energy coupling heat supply module and the heat conduction oil pump are integrated in a customized container.
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