Multi-energy coupling gathering and transportation station energy storage heating system and heating method for oil field site
By adopting a multi-energy coupled energy storage heating system in the oil and gas collection and transportation process, using solar energy collectors and phase change heat storage technology, combined with the Gufeng electricity price difference, the problems of high energy consumption and carbon emissions of gas heating furnaces are solved, and 24-hour continuous low-cost heating is achieved, reducing oil field production costs and costs.
Patent Information
- Application Number
- CN202311565838.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-22
- Publication Date
- 2025-05-30
AI Technical Summary
The high energy consumption and carbon emission problems of gas heating furnaces during the existing oil and gas collection and transportation process make it difficult to achieve 24-hour continuous low-cost heating.
The multi-energy coupled energy storage heating system of the conveyor station is adopted, and the auxiliary heating method of solar energy collector + phase change heat storage is combined with the valley peak electricity price difference to reduce the use of gas heating furnace.
Reduce carbon emissions through solar thermal storage, reduce heating costs by using the peak electricity price difference, achieve 24-hour continuous low-cost heating, and reduce oil field production costs and costs.
Smart Images
Figure CN120062821A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of oil and gas gathering and transportation, and particularly relates to an energy storage heating system and a heating method for a multi-energy coupling gathering and transportation station in an oilfield site. Background Art
[0002] Gas-fired heating furnaces are the main energy-consuming and waste gas-emitting equipment in the process of oil and gas gathering and transportation. At present, there are tens of thousands of different types of heating furnaces built in major oilfields in China, and the energy consumption and carbon emissions are extremely astonishing. With the increasingly strict global requirements for energy and environmental protection, major oilfields have replaced gas-fired heating furnaces with single energy use methods such as electric heating furnaces, air source heat pumps, and solar thermal energy. Although electric heating furnaces have high thermal efficiency, their economy is poor; air source heat pumps use the peak-valley electricity difference to increase the heating capacity, but are affected by the operating environment temperature and have low heating energy efficiency at low temperatures, and the application scenarios are limited; solar thermal collectors have good heat collection effects, but have high investment, large site occupation, and limited daily sunlight time. None of the above energy use methods can ensure continuous low-cost heating of crude oil for 24 hours. Summary of the Invention
[0003] In view of the above problems, the purpose of the present invention is to provide an energy storage heating system and a heating method for a multi-energy coupling gathering and transportation station in an oilfield site. Through the auxiliary heating method of solar collectors + phase change heat storage, the use of gas-fired heating furnaces is reduced, carbon emissions are reduced through solar heat collection and storage, heating costs are reduced by using the peak-valley electricity price difference, peak shaving and valley filling are achieved, and the production costs of oilfields are greatly reduced, and the costs are reduced.
[0004] The technical solution of the present invention is as follows: An energy storage heating system for a multi-energy coupling gathering and transportation station in an oilfield site includes a main heater, a heat storage tank, a buffer tank, and a circulation pump that are sequentially connected through pipelines to form a loop. A solar heating branch is provided on the pipeline between the main heater and the circulation pump. A heat exchange branch is provided on the pipeline between the heat storage tank and the buffer tank. The solar heating branch includes a plurality of solar collectors and a temperature controller. The plurality of solar collectors are connected in series or in parallel through pipelines. A second electric valve is provided on the pipeline on the side where the solar heating branch is connected to the circulation pump. A first electric valve is provided on the pipeline on the side where the solar heating branch is connected to the main heater. The heat exchange branch includes a heat exchanger, and a pipeline for the medium to be heated to enter and exit is connected to the heat exchanger.
[0005] A third electric valve is provided on the pipeline between the buffer tank and the circulation pump.
[0006] An auxiliary heater is provided on the pipeline between the heat storage tank and the buffer tank.
[0007] A second three-way electric valve is provided at the connection between the circulation pump and the solar heating branch, and a first three-way electric valve is provided at the connection between the heat storage tank and the heat exchange branch.
[0008] A plate heat exchanger is provided on the pipeline between the main heater and the circulation pump. Both ends of the solar heating branch are respectively connected to the plate heat exchanger. A branch circulation pump and a liquid supplement branch are also provided on the solar heating branch.
[0009] The liquid supplement branch includes a liquid supplement tank, a liquid supplement pump, and an expansion tank.
[0010] The heat storage tank includes a heat storage tank body. A heat storage tank body support is provided outside the heat storage tank body. A U-shaped coil is provided inside the heat storage tank body. Both ends of the U-shaped coil are respectively connected with an inlet flange and an outlet flange. Both the inlet flange and the outlet flange are located at the top of the heat storage tank body. Phase change material is filled in the gaps between the U-shaped coils inside the heat storage tank body. The phase change material is in a solid state at normal temperature of 30°C - 70°C and will become liquid when the temperature reaches 80°C and above.
[0011] A multi-energy coupling gathering and transportation station energy storage heating method for on-site oil fields, using the above-mentioned multi-energy coupling gathering and transportation station energy storage heating system for on-site oil fields, includes the following steps: S1: When solar energy is relatively sufficient during the day, the solar collector absorbs heat. Open the first electric valve and the second electric valve. Hot water flows out from the solar collector, passes through the main heater, reaches the heat storage tank, stores energy for the heat storage tank, then flows through the heat exchanger of the heat exchange branch to heat the crude oil, and finally flows back to the solar collector; if the temperature of the crude oil reaches the specified temperature, avoid the heat exchange branch. S2: When there is no sun during the day or at night, in the case of no sunlight or at night, cut off the solar heating branch. At this time, the heat storage tank starts to work and releases heat externally. The main heater does not work. Cold water is heated by the heat storage tank and then flows through the heat exchange branch. The heat exchanger heats the crude oil, and then flows back to the heat storage tank through the main heater. If the temperature of the crude oil reaches the specified temperature, avoid the heat exchange branch. If the heat in the heat storage tank is released completely, the main heater starts to work, heats the cold water, flows through the heat exchange branch, and the heat exchanger heats the crude oil.
[0012] The technical effects of the present invention are as follows: 1. The present invention uses the auxiliary heating method of solar collector + phase change heat storage, reduces carbon emissions through solar heat collection and storage, reduces heating costs by using the valley-peak electricity price difference, achieves peak shaving and valley filling, greatly reduces the production costs of oil fields, and reduces costs; 2. The present invention is provided with a branch circulation pump and a liquid supplement branch on the solar heating branch, and exchanges heat with the main pipeline through a plate heat exchanger, which is convenient for the use and maintenance of the solar heating branch and does not affect the normal operation of the main pipeline; 3. The present invention stores and releases heat through the cooperation of the heat exchange branch and the heat storage tank, saves energy, and reduces the operating cost.
[0013] The following will be further described in conjunction with the drawings. Description of the Drawings
[0014] Figure 1 This is a schematic structural diagram of a multi - energy coupling gathering and transportation station energy storage heating system for on - site oilfield use in an embodiment of the present invention.
[0015] Figure 2 This is a schematic structural diagram of a system with an independent solar heat collection cycle in an embodiment of the present invention.
[0016] Figure 3 This is a schematic structural diagram of a heat storage tank in an embodiment of the present invention.
[0017] Reference numerals: 1 - solar collector, 2 - temperature controller, 3 - first electric valve, 4 - main heater, 5 - heat storage tank, 6 - auxiliary heater, 7 - first three - way electric valve, 8 - heat exchanger, 9 - second three - way electric valve, 10 - second electric valve, 11 - circulation pump, 12 - buffer tank, 13 - third electric valve, 14 - plate heat exchanger, 15 - branch circulation pump, 16 - expansion tank, 17 - filling pump, 18 - filling tank, 19 - inlet flange, 20 - U - shaped coil, 21 - heat storage tank body support, 22 - heat storage tank body, 23 - outlet flange. Detailed implementation manners Embodiment 1
[0018] As Figure 1 shown, a multi - energy coupling gathering and transportation station energy storage heating system for on - site oilfield use includes a main heater 4, a heat storage tank 5, a buffer tank 12, and a circulation pump 11 that are sequentially connected through pipelines to form a loop. A solar heating branch is provided on the pipeline between the main heater 4 and the circulation pump 11, and a heat exchange branch is provided on the pipeline between the heat storage tank 5 and the buffer tank 12. The solar heating branch includes a plurality of solar collectors 1 and a temperature controller 2. The plurality of solar collectors 1 are connected in series or in parallel through pipelines. A second electric valve 10 is provided on the pipeline on the side where the solar heating branch is connected to the circulation pump 11, and a first electric valve 3 is provided on the pipeline on the side where the solar heating branch is connected to the main heater 4. The heat exchange branch includes a heat exchanger 8, and a pipeline for the medium to be heated to enter and exit is connected to the heat exchanger 8.
[0019] During actual use, when solar energy is sufficient during the day in the present invention, the solar collector 1 absorbs heat, the first electric valve 3 and the second electric valve 10 are opened, hot water flows out from the solar collector 1, passes through the main heater 4, reaches the heat storage tank 5, stores energy for the heat storage tank 5, then flows through the heat exchanger 8 of the heat exchange branch to heat the crude oil, and finally flows back to the solar collector 1; if the temperature of the crude oil reaches the specified temperature, the heat exchange branch is bypassed; when there is no sun during the day or at night, in the case of no solar illumination or at night, the solar heating branch is cut off. At this time, the heat storage tank 5 starts to work and releases heat externally, the main heater 4 does not work, cold water is heated by the heat storage tank 5 and then flows through the heat exchange branch, the crude oil is heated by the heat exchanger 8, and then flows back to the heat storage tank 5 through the main heater 4. If the temperature of the crude oil reaches the specified temperature, the heat exchange branch is bypassed. If the heat in the heat storage tank 5 is exhausted, the main heater 4 starts to work, heats the cold water, flows through the heat exchange branch, and the crude oil is heated by the heat exchanger 8. The present invention adopts an auxiliary heating method of solar collector + phase change heat storage, reduces carbon emissions through solar heat collection and storage, reduces heating costs by using the valley-to-peak electricity price difference, achieves peak shaving and valley filling, greatly reduces the production costs of oilfields, and reduces costs. Example 2
[0020] Preferably, on the basis of Example 1, in this embodiment, a third electric valve 13 is provided on the pipeline between the buffer tank 12 and the circulation pump 11.
[0021] During actual use, a third electric valve 13 is provided on the pipeline between the buffer tank 12 and the circulation pump 11 in the present invention, which is convenient for controlling the liquid volume of the buffer tank and ensuring the stable operation of the pipeline. Example 3
[0022] Preferably, on the basis of Example 1 or Example 2, in this embodiment, an auxiliary heater 6 is provided on the pipeline between the heat storage tank 5 and the buffer tank 12.
[0023] During actual use, an auxiliary heater 6 is provided on the pipeline between the heat storage tank 5 and the buffer tank 12 in the present invention. The auxiliary heater 6 is used to jointly heat and supply energy with the main heater 4 when there is no heat exchange in the solar heating branch and the heat in the heat storage tank 5 is insufficient. Example 4
[0024] Preferably, on the basis of Example 1 or Example 3, in this embodiment, a second three-way electric valve 9 is provided at the connection of the circulation pump 11 and the solar heating branch, and a first three-way electric valve 7 is provided at the connection of the heat storage tank 5 and the heat exchange branch.
[0025] During actual use, a second three-way electric valve 9 is provided at the connection between the circulation pump 11 of the present invention and the solar heating branch, and a first three-way electric valve 7 is provided at the connection between the heat storage tank 5 and the heat exchange branch. The present invention switches between the solar heating branch and the heat exchange branch through the second three-way electric valve 9 and the first three-way electric valve 7, which is simple and convenient. Example 5
[0026] Preferably, on the basis of Example 1 or Example 4, in this embodiment, a plate heat exchanger 14 is provided on the pipeline between the main heater 4 and the circulation pump 11. Both ends of the solar heating branch are respectively connected to the plate heat exchanger 14. A branch circulation pump 15 and a liquid supplement branch are also provided on the solar heating branch.
[0027] During actual use, a plate heat exchanger 14 is provided on the pipeline between the main heater 4 and the circulation pump 11 of the present invention. Both ends of the solar heating branch are respectively connected to the plate heat exchanger 14. A branch circulation pump 15 and a liquid supplement branch are also provided on the solar heating branch. By providing a branch circulation pump and a liquid supplement branch on the solar heating branch and exchanging heat through the plate heat exchanger with the main pipeline, the use and maintenance of the solar heating branch are facilitated without affecting the normal operation of the main pipeline. Example 6
[0028] Preferably, on the basis of Example 1 or Example 5, in this embodiment, the liquid supplement branch includes a liquid supplement tank 18, a liquid supplement pump 17, and an expansion tank 16.
[0029] During actual use, the liquid supplement branch of the present invention includes a liquid supplement tank 18, a liquid supplement pump 17, and an expansion tank 16, which facilitates the replenishment of the heat exchange medium in the solar heating branch. The expansion tank 16 ensures the stable operation of the liquid supplement branch. Example 7
[0030] Preferably, on the basis of Example 1 or Example 5, in this embodiment, as Figure 3 shown, the heat storage tank 5 includes a heat storage tank body 22. A heat storage tank body bracket 21 is provided outside the heat storage tank body 22. A U-shaped coil 20 is provided inside the heat storage tank body 22. Both ends of the U-shaped coil 20 are respectively connected with an inlet flange 19 and an outlet flange 23. Both the inlet flange 19 and the outlet flange 23 are located at the top of the heat storage tank body 22. Phase change material is filled in the gaps between the U-shaped coils 20 inside the heat storage tank body 22. The phase change material is in a solid state at normal temperature of 30°C - 70°C and will turn into a liquid state when the temperature reaches 80°C or above.
[0031] During actual use, the present invention stores and releases heat through the fluid medium in the U-shaped coil 20 and the phase change material filled in the gap between the U-shaped coils 20 inside the heat storage tank body 22. Specifically, when solar energy is relatively abundant during the day, the solar collector 1 absorbs heat, the first electric valve 3 and the second electric valve 10 are opened, and hot water flows out from the solar collector 1, reaches the U-shaped coil 20 in the heat storage tank 5, heats the phase change material, and the phase change material absorbs heat and becomes liquid for energy storage; when there is no sun during the day or at night, in the case of no sunlight or at night, the solar heating branch is cut off, and at this time the heat storage tank 5 starts to work, the phase change material releases heat externally, and the cold water is heated by flowing through the U-shaped coil 20 in the heat storage tank 5 and then flows through the heat exchange branch, and the crude oil is heated by the heat exchanger 8. Example 8
[0032] A heat storage heating method for a multi-energy coupling gathering and transportation station used in an oil field site, using a multi-energy coupling gathering and transportation station heat storage heating system as described above, includes the following steps: S1: When solar energy is relatively abundant during the day, the solar collector 1 absorbs heat, the first electric valve 3 and the second electric valve 10 are opened, hot water flows out from the solar collector 1, passes through the main heater 4, reaches the heat storage tank 5, stores energy for the heat storage tank 5, and then flows through the heat exchanger 8 in the heat exchange branch to heat the crude oil, and finally flows back to the solar collector 1; if the temperature of the crude oil reaches the specified temperature, the heat exchange branch is bypassed; S2: When there is no sun during the day or at night, in the case of no sunlight or at night, the solar heating branch is cut off, and at this time the heat storage tank 5 starts to work and releases heat externally, the main heater 4 does not work, the cold water is heated by flowing through the heat storage tank 5 and then flows through the heat exchange branch, and the crude oil is heated by the heat exchanger 8, and then flows back to the heat storage tank 5 through the main heater 4. If the temperature of the crude oil reaches the specified temperature, the heat exchange branch is bypassed. If the heat in the heat storage tank 5 is exhausted, the main heater 4 starts to work to heat the cold water, which flows through the heat exchange branch, and the crude oil is heated by the heat exchanger 8.
[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.
Claims
1. A multi-energy coupling gathering and transportation station energy storage heating system for on-site oilfield use, characterized in that: It includes a main heater (4), a heat storage tank (5), a buffer tank (12) and a circulation pump (11) connected in sequence through pipelines to form a loop. A solar heating branch is provided on the pipeline between the main heater (4) and the circulation pump (11). A heat exchange branch is provided on the pipeline between the heat storage tank (5) and the buffer tank (12). The solar heating branch includes a plurality of solar collectors (1) and a temperature controller (2). The plurality of solar collectors (1) are connected in series or in parallel through pipelines. A second electric valve (10) is provided on the pipeline on the side where the solar heating branch is connected to the circulation pump (11). A first electric valve (3) is provided on the pipeline on the side where the solar heating branch is connected to the main heater (4). The heat exchange branch includes a heat exchanger (8), and a pipeline for the medium to be heated to enter and exit is connected to the heat exchanger (8).
2. The multi-energy coupling gathering and transportation station energy storage heating system for on-site oilfield use according to claim 1, characterized in that: A third electric valve (13) is provided on the pipeline between the buffer tank (12) and the circulation pump (11).
3. The multi-energy coupling gathering and transportation station energy storage heating system for on-site oilfield use according to claim 1, characterized in that: An auxiliary heater (6) is provided on the pipeline between the heat storage tank (5) and the buffer tank (12).
4. The multi-energy coupling gathering and transportation station energy storage heating system for on-site oilfield use according to claim 1, characterized in that: A second three-way electric valve (9) is provided at the connection of the circulation pump (11) and the solar heating branch, and a first three-way electric valve (7) is provided at the connection of the heat storage tank (5) and the heat exchange branch.
5. The multi-energy coupling gathering and transportation station energy storage heating system for on-site oilfield use according to claim 1, characterized in that: A plate heat exchanger (14) is provided on the pipeline between the main heater (4) and the circulation pump (11). The two ends of the solar heating branch are respectively connected to the plate heat exchanger (14). A branch circulation pump (15) and a liquid supplement branch are also provided on the solar heating branch.
6. The multi-energy coupling gathering and transportation station energy storage heating system for on-site oilfield use according to claim 1, characterized in that: The liquid supplement branch includes a liquid supplement tank (18), a liquid supplement pump (17) and an expansion tank (16).
7. The multi-energy coupling gathering and transportation station energy storage heating system for on-site oilfield use according to claim 1, characterized in that: The heat storage tank (5) includes a heat storage tank body (22). A support (21) for the heat storage tank body is provided outside the heat storage tank body (22). A U-shaped coil pipe (20) is arranged inside the heat storage tank body (22). The two ends of the U-shaped coil pipe (20) are respectively connected with a water inlet flange (19) and a water outlet flange (23). Both the water inlet flange (19) and the water outlet flange (23) are located at the top of the heat storage tank body (22). Phase change materials are filled in the gaps between the U-shaped coil pipes (20) inside the heat storage tank body (22). The phase change materials are in a solid state at a normal temperature of 30°C - 70°C and will turn into a liquid state when the temperature reaches 80°C or above.
8. A method for energy storage and heating of a multi-energy coupling gathering and transportation station for on-site oilfield use, using the multi-energy coupling gathering and transportation station energy storage and heating system for on-site oilfield use as described in claim 1. It is characterized in that: It includes the following steps: S1: When solar energy is relatively sufficient during the day, the solar collector (1) absorbs heat. The first electric valve (3) and the second electric valve (10) are opened. Hot water flows out from the solar collector (1), passes through the main heater (4), reaches the heat storage tank (5), stores energy in the heat storage tank (5), then flows through the heat exchanger (8) in the heat exchange branch to heat the crude oil, and finally flows back to the solar collector (1); if the temperature of the crude oil reaches the specified temperature, the heat exchange branch is bypassed. S2: When there is no sun during the day or at night, in the case of no sunlight or at night, the solar heating branch is cut off. At this time, the heat storage tank (5) starts to work and releases heat externally. The main heater (4) does not work. Cold water is heated by the heat storage tank (5) and then flows through the heat exchange branch. The heat exchanger (8) heats the crude oil, and then flows back to the heat storage tank (5) through the main heater (4). If the temperature of the crude oil reaches the specified temperature, the heat exchange branch is bypassed. If the heat in the heat storage tank (5) is exhausted, the main heater (4) starts to work, heats the cold water, flows through the heat exchange branch, and the heat exchanger (8) heats the crude oil.