Oil transportation drag reduction system based on continuous and uniform heating of thermoelectric coupling

Abstract

The present invention relates to a petroleum transportation drag reduction system based on thermoelectric coupling continuous and uniform heating, comprising a focusing unit, a heating unit, a first liquid circuit and a second liquid circuit, wherein the focusing unit comprises a hollow arc-shaped support plate, a CPC concentrator installed on the hollow arc-shaped support plate and opening upward, and an arc-shaped photovoltaic battery group located at the bottom of the CPC concentrator and facing the opening of the CPC concentrator; the heating unit comprises a water-flowing cavity arranged on the outer peripheral wall of the oil pipeline and a serpentine tube close to or attached to the lower side of the arc-shaped photovoltaic battery group, and the outlet section of the serpentine tube is connected to the water-flowing cavity; the first liquid circuit comprises a water storage tank and a cold water pipe group arranged in the hollow arc-shaped support plate, the outlet of the water storage tank is connected to the inlet of the cold water pipe group through a first water pump, the outlet of the cold water pipe group is connected to the inlet of the serpentine tube, and the water-flowing cavity is connected to the inlet of the water storage tank; the second liquid circuit comprises a disc-type buried pipe, an oil-water plate heat exchanger and a hot water pipe group. The present invention can efficiently utilize solar energy to realize continuous heating of the oil transportation pipeline.

Description

Technical Field

[0001] The invention relates to the field of oil transportation drag reduction, and in particular to an oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating. Background Art

[0002] Pipeline transportation is one of the main modes of transporting oil. However, since oil is a relatively viscous fluid, the flow rate is very slow during pipeline transportation, which affects the speed of pipeline transportation. In traditional pipeline transportation, a large amount of heat is required to preheat the oil, which consumes a lot of extra energy. It is also proposed to use solar energy to heat the oil in the pipe to increase the temperature and reduce resistance. However, solar energy is intermittent and discontinuous, while oil transportation is continuous and uninterrupted. How to efficiently use solar energy to achieve continuous heating of oil is a problem that urgently needs to be solved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an oil transportation drag reduction system based on continuous and uniform heating by thermoelectric coupling, which can efficiently utilize solar energy to achieve continuous heating of oil transportation pipelines.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a petroleum transportation drag reduction system based on thermoelectric coupling continuous and uniform heating, comprising:

[0005] A concentrating unit, comprising a hollow arc-shaped support plate, a CPC concentrator mounted on the hollow arc-shaped support plate and with an opening facing upward, and an arc-shaped photovoltaic cell group located at the bottom of the CPC concentrator and the hollow arc-shaped support plate and facing the opening of the CPC concentrator;

[0006] The heating unit comprises a water flow cavity arranged on the outer peripheral wall of the oil pipeline and a serpentine pipe close to or attached to the lower side of the arc-shaped photovoltaic cell group, wherein the outlet section of the serpentine pipe is connected to the water flow cavity;

[0007] The first liquid circuit includes a water storage tank and a cold water pipe group arranged in the hollow arc-shaped support plate, the outlet of the water storage tank is connected to the inlet of the cold water pipe group through a first water pump, the outlet of the cold water pipe group is connected to the inlet of the serpentine pipe, and the water cavity is connected to the inlet of the water storage tank;

[0008] The second liquid circuit includes a disc-type buried pipe, a plurality of oil-water plate heat exchangers installed and fixed on the oil pipeline, and a hot water pipe group arranged in the hollow arc-shaped support plate. The cold water inlet of the oil-water plate heat exchanger is connected to the outside, and the hot water outlet is connected to the inlet of the disc-type buried pipe. The outlet of the disc-type buried pipe is connected to the inlet of the hot water pipe group through a second water pump, and the outlet of the hot water pipe group is connected to the inlet of the outlet section of the serpentine pipe.

[0009] Furthermore, the serpentine pipe includes a serpentine reciprocating section and two straight pipe sections respectively extending along the axial direction of the oil pipeline. The two straight pipe sections are located on both sides of the serpentine reciprocating section and are respectively connected to the outlets of the serpentine reciprocating section. The straight pipe sections serve as the outlet sections of the serpentine pipe. The outlet section is evenly spaced with multiple liquid pumps so that the hot water in the outlet section can be pumped into the water cavity through the liquid pumps.

[0010] Furthermore, the oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating also includes a hollow load-bearing bracket, which is connected to the hollow arc-shaped support plate to support the hollow arc-shaped support plate, and a cold water connecting pipe group and a hot water connecting pipe group are arranged in the hollow load-bearing bracket, the outlet of the water storage tank, the cold water connecting pipe group and the cold water pipe group are connected in sequence, and the outlet of the disc-type buried pipe, the hot water connecting pipe group and the hot water pipe group are connected in sequence.

[0011] In order to automatically chase the light, the oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating also includes a light chasing system, which includes:

[0012] A sunlight capture instrument is used to collect sunlight signals and convert the sunlight signals into corresponding digital signals;

[0013] a signal receiving processor, configured to generate a control signal based on the digital signal;

[0014] The angle adjustment device is arranged between the hollow arc-shaped support plate and the CPC concentrator and connected to the signal receiving processor, and is used for adjusting the focusing angle of the CPC concentrator under the control of the control signal.

[0015] Furthermore, the upper end of the water cavity has a notch, and the arc-shaped photovoltaic cell group is snapped into the notch of the water cavity.

[0016] In order to further extend the heat exchange time, a plurality of water blocking plates are arranged at intervals on the inner wall of the water cavity;

[0017] Furthermore, the outer wall of the water cavity is coated with a graphene coating.

[0018] In order to make full use of the heat, a preheating chamber is provided at the bottom of the water storage tank, and the outlet of the water cavity is connected to the preheating chamber.

[0019] After adopting the above technical solution, the present invention has the following beneficial effects:

[0020] 1. Overcoming the problem that the drag reduction of oil pipelines in the past required the consumption of additional energy, the present invention utilizes pollution-free and renewable solar energy resources to achieve energy conservation, environmental protection, and green sustainability; the present invention can also extend the life of the arc photovoltaic battery group;

[0021] 2. Overcome the instability of solar energy resources. While heating the oil in the oil pipeline, it also collects excess heat from the oil, achieving full utilization of energy. It combines direct solar heating with heat storage heating to ensure continuous and uninterrupted heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating of the present invention;

[0023] Figure 2 It is a structural schematic diagram of another perspective of the oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating of the present invention;

[0024] Figure 3 It is a schematic diagram of the installation of the CPC concentrator and the arc-shaped photovoltaic cell group 3 of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the oil-water plate heat exchanger of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the serpentine tube of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the inner wall of the water flow cavity of the present invention. DETAILED DESCRIPTION

[0028] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0029] like Figure 1 , 2 , 3, 4, 5, and 6, a petroleum transportation drag reduction system based on thermoelectric coupling continuous and uniform heating, comprising:

[0030] A concentrating unit, comprising a hollow arc-shaped support plate 1, a CPC concentrator 2 mounted on the hollow arc-shaped support plate 1 and with an opening facing upward, and an arc-shaped photovoltaic cell group 3 located at the bottom of the CPC concentrator 2 and the hollow arc-shaped support plate 1 and facing the opening of the CPC concentrator 2;

[0031] The heating unit comprises a water flow cavity 4 arranged on the outer peripheral wall of the oil pipeline and a serpentine tube 5 close to or attached to the lower side of the arc-shaped photovoltaic cell group 3, wherein the outlet section of the serpentine tube 5 is connected to the water flow cavity 4;

[0032] The first liquid circuit includes a water storage tank 61 and a cold water pipe group 62 disposed in the hollow arc-shaped support plate 1, wherein the outlet of the water storage tank 61 is connected to the inlet of the cold water pipe group 62 through a first water pump, the outlet of the cold water pipe group 62 is connected to the inlet of the serpentine pipe 5, and the water cavity 4 is connected to the inlet of the water storage tank 61;

[0033] The second liquid circuit includes a disc-type buried pipe 71, a plurality of oil-water plate heat exchangers 72 installed and fixed on the oil pipeline, and a hot water pipe group 73 arranged in the hollow arc-shaped support plate 1. The cold water inlet of the oil-water plate heat exchanger 72 is connected to the outside, and the hot water outlet is connected to the inlet of the disc-type buried pipe 71. The outlet of the disc-type buried pipe 71 is connected to the inlet of the hot water pipe group 73 through a second water pump, and the outlet of the hot water pipe group 73 is connected to the inlet of the outlet section of the serpentine pipe 5.

[0034] In this embodiment, valve one is arranged on the first liquid circuit, and valve two is arranged on the second liquid circuit. When valve one is opened and valve two is closed, the focusing unit performs heating work; when valve one is closed and valve two is opened, the disc-type buried pipe 71 performs heating work.

[0035] When there is sufficient sunlight during the day, the oil pipeline mainly relies on the focusing unit for heating. Valve 1 is opened and valve 2 is closed. The water in the water storage tank 61 is pumped into the cold water pipe group 62 in the hollow arc support plate 1 by the first water pump, and then enters the serpentine pipe 5. After the heat exchange is completed, it enters the water flow cavity 4 through the outlet section of the serpentine pipe 5 to achieve heating of the oil pipeline wall; at every fixed distance section, the oil temperature rises significantly, and the oil-water plate heat exchanger 72 is used to store the heat of the high-temperature oil in the disc buried pipe 71. At night or when there is no light, valve 1 is closed and valve 2 is opened. The hot water in the disc buried pipe 71 is pumped into the hot water pipe group in the hollow arc support plate 1 by the second water pump, and then the outlet of the hot water pipe group is connected to the water outlet section of the serpentine pipe 5, and then enters the water flow cavity 4, and the hot water in the disc buried pipe 71 is used to achieve auxiliary heating of the oil pipeline.

[0036] In this embodiment, a storage box is also included, and the storage box is connected to the arc photovoltaic battery group 3. When the heating capacity of the disc-type buried pipe 71 is insufficient or insufficient, the oil pipeline can also be heated by the electric energy stored in the storage box. When the electric energy is used for heating, water can be heated by electric energy, and the oil pipeline can also be directly heated. Electric energy heating is a mature existing technology and will not be described in detail here. The storage box can also power the pump.

[0037] In this embodiment, the hollow arc support plate 1 supports the CPC concentrator 2, and is coated with an aluminum silicate coating inside, which can provide a good insulation effect for the cold water pipe group 62 and the hot water pipe group 73, thereby reducing heat loss. At the same time, the slope effect of the hollow arc support plate 1 is utilized to make the water quality entering the serpentine pipe 5 more stable.

[0038] When the photovoltaic battery group is working, only a small part of the light energy is converted into electrical energy, and a large part of it is still in the form of heat, which makes the temperature of the photovoltaic battery group rise, and the temperature can reach 100℃+. Too high temperature will affect the life and electrical efficiency of the photovoltaic battery group. In this embodiment, the heat of the arc photovoltaic battery group 3 is collected by medium water, and the medium water then heats the low-temperature oil. Among them, the material of the serpentine tube 5 is a stainless steel material with good heat exchange effect. The serpentine tube 5 is attached to the bottom surface of the arc photovoltaic battery group 3. When the temperature of the arc photovoltaic battery group 3 rises, the temperature of the serpentine tube 5 will also rise, and the circulating medium water in the serpentine tube 5 will also change from low temperature to high temperature, realizing heat exchange. In the case of water-cooled heat exchange, the temperature of the arc photovoltaic battery group 3 can be reduced to about 50℃-60℃, at which time the electrical efficiency can be maintained at more than 25%, and the service life can also be guaranteed. The electrical energy is stored in the storage box, and the heat energy is recycled at the same time, killing two birds with one stone.

[0039] like Figure 5 As shown, the serpentine tube 5 includes a serpentine reciprocating section 51 and two straight sections 52 extending along the axial direction of the oil pipeline, respectively. The two straight sections 52 are located on both sides of the serpentine reciprocating section 51 and are connected to the outlets of the serpentine reciprocating section 51 respectively. The straight sections serve as the outlet sections of the serpentine tube 5. The outlet sections are evenly spaced and equipped with a plurality of liquid pumps 53 to pump the hot water in the outlet sections into the water flow chamber 4 through the liquid pumps 53. The serpentine reciprocating section 51 is reciprocating and circuitous, and has a relatively long length, which can extend the heat exchange time. There are two straight sections 52, which extend along the axial direction of the oil pipeline, so that hot water can evenly enter the water flow chamber 4 from both sides of the water flow chamber 4. In this embodiment, the serpentine tube 5 is also equipped with a liquid separation valve, so that the hot water can evenly enter the straight sections 52 on both sides.

[0040] like Figure 1 , 2As shown in Figures 3, 4, 5, and 6, the oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating also includes a hollow load-bearing bracket 8, which is connected to the hollow arc-shaped support plate 1 to support the hollow arc-shaped support plate 1. The hollow load-bearing bracket 8 is provided with a cold water connecting pipe group 63 and a hot water connecting pipe group 74. The outlet of the water storage tank 61, the cold water connecting pipe group 63, and the cold water pipe group 62 are connected in sequence, and the outlet of the disc-type buried pipe 71, the hot water connecting pipe group 74, and the hot water pipe group 73 are connected in sequence. The hollow load-bearing bracket 8 can support the hollow arc-shaped support plate 1, which is conducive to the stability of the structure. The cold water connecting pipe group 63 and the hot water connecting pipe group 74 are provided. The water storage tank 61 and the cold water pipe group 62 are connected through the cold water connecting pipe group 63, and the disc-type buried pipe 71 and the hot water pipe group 73 are connected through the hot water connecting pipe group 74, which can effectively prevent the water pipes from being exposed to the external environment and minimize heat loss. Furthermore, the water in the water storage tank 61 or the disc-type buried pipe 71 directly enters the cold and hot water pipe group in the hollow arc support plate 1 along the vertical direction through the cold and hot water connecting pipe group in the hollow load-bearing bracket 8, and then enters the serpentine pipe 5 along the slope through the slope effect of the hollow arc support plate 1. Considering that if the water pipe is bent, the resistance of the working medium water at the pipeline where the sudden change occurs becomes larger, and a larger driving power is required to pass through. Compared with the short-distance head difference, the resistance power consumption caused by the sudden change has a greater influence. Therefore, compared with the water passing method in this embodiment that directly bends from the vertical hollow load-bearing bracket 8 to enter the serpentine pipe 5, it can greatly reduce the carrying power of the first water pump and the second water pump.

[0041] like Figure 1 , 2 As shown in , 3, 4, 5, and 6, the oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating also includes a light chasing system, and the light chasing system includes:

[0042] A sunlight capture device 91 is used to collect sunlight signals and convert the sunlight signals into corresponding digital signals;

[0043] a signal receiving processor 92, configured to generate a control signal based on the digital signal;

[0044] The angle adjustment device 93 is arranged between the hollow arc-shaped support plate 1 and the CPC concentrator 2 and connected to the signal receiving processor 92, and is used for adjusting the focusing angle of the CPC concentrator 2 under the control of the control signal.

[0045] In this embodiment, the sunlight capture instrument 91 includes a control circuit, a photosensor, and an A / D conversion chip. The photosensor serves as a sensor to convert an optical signal into an electrical signal, and then uses the A / D conversion chip to convert the electrical signal into a digital signal. The signal receiving processor 92 can be a single-chip microcontroller. The signal receiving processor 92 is located in the sunlight capture instrument 91, receives the digital signal transmitted by the A / D conversion chip, and generates a control signal based on the digital signal. The angle adjustment device 93 is a controlled element, and the power element is a micro motor. The control signal generated by the signal receiving processor 92 reaches the micro motor of the angle adjustment device 93, and the micro motor drives the CPC concentrator 2 to deflect and adjust the focusing angle to achieve the purpose of automatically tracking the light source, so that the photoelectric and photothermal conversion efficiency of the system is optimized.

[0046] like Figure 1 , 2 As shown in FIG. 5 , a notch is provided at the upper end of the water cavity 4, and the arc-shaped photovoltaic cell group 3 is buckled in the notch position of the water cavity 4. In this way, the arc-shaped photovoltaic cell group 3 can directly heat the position of the oil pipeline facing the notch.

[0047] like Figure 6 As shown, the inner wall of the water cavity 4 is provided with a plurality of water blocking plates 41 at intervals. The water blocking plates 41 are provided to extend the time for hot water to flow in the water cavity 4 and promote heat exchange.

[0048] In this embodiment, the outer wall of the water cavity 4 is coated with a graphene coating. The graphene coating can play a role in heat preservation. The traditional heat preservation method is to wrap the pipeline with materials such as rock wool and glass wool. The traditional method increases the burden of the pipeline and greatly reduces the heat preservation effect when it encounters water. At the same time, it also affects the focusing effect. Graphene does not have these disadvantages.

[0049] like Figure 1 , 2 As shown, the bottom of the water storage tank 61 has a preheating chamber 611 , and the outlet of the water discharge chamber 4 is connected to the preheating chamber 611 .

[0050] In this embodiment, the hot water in the water flow chamber 4 becomes warm water after the heat is absorbed by the oil in the oil pipeline. The warm water flows into the preheating chamber 611 at the bottom of the water storage tank 61 from the water outlet valve at the bottom of the water flow chamber 4. The warm water in the preheating chamber 611 preheats the low-temperature water in the water storage tank 61.

[0051] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A petroleum transportation drag reduction system based on thermoelectric coupling continuous and uniform heating, characterized in that: include: A light concentrating unit, comprising a hollow arc-shaped support plate (1), a CPC concentrator (2) mounted on the hollow arc-shaped support plate (1) and with an opening facing upward, and an arc-shaped photovoltaic cell group (3) located at the bottom of the CPC concentrator (2) and the hollow arc-shaped support plate (1) and facing the opening of the CPC concentrator (2); The heating unit comprises a water flow cavity (4) arranged on the outer peripheral wall of the oil pipeline and a serpentine tube (5) close to or attached to the lower side of the arc-shaped photovoltaic battery group (3), wherein the outlet section of the serpentine tube (5) is connected to the water flow cavity (4); A first liquid circuit comprises a water storage tank (61) and a cold water pipe group (62) arranged in the hollow arc-shaped support plate (1); the outlet of the water storage tank (61) is connected to the inlet of the cold water pipe group (62) through a first water pump; the outlet of the cold water pipe group (62) is connected to the inlet of the serpentine pipe (5); and the water flow cavity (4) is connected to the inlet of the water storage tank (61); The second liquid circuit comprises a disc-type buried pipe (71), a plurality of oil-water plate heat exchangers (72) installed and fixed on the oil pipeline, and a hot water pipe group (73) arranged in the hollow arc-shaped support plate (1), wherein the cold water inlet of the oil-water plate heat exchanger (72) is connected to the outside, and the hot water outlet is connected to the inlet of the disc-type buried pipe (71), the outlet of the disc-type buried pipe (71) is connected to the inlet of the hot water pipe group (73) through a second water pump, and the outlet of the hot water pipe group (73) is connected to the inlet of the outlet section of the serpentine pipe (5).

2. The oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating according to claim 1 is characterized in that: The serpentine pipe (5) comprises a serpentine reciprocating section (51) and two straight pipe sections (52) respectively extending along the axial direction of the oil pipeline. The two straight pipe sections (52) are located on both sides of the serpentine reciprocating section (51) and are respectively connected to the outlets of the serpentine reciprocating section (51). The straight pipe sections serve as outlet sections of the serpentine pipe (5). The outlet section is evenly spaced with a plurality of liquid pumps (53) so that the hot water in the outlet section can be pumped into the water discharge cavity (4) through the liquid pumps (53).

3. The oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating according to claim 1 is characterized in that: The invention also comprises a hollow load-bearing bracket (8), wherein the hollow load-bearing bracket (8) is connected to the hollow arc-shaped support plate (1) to support the hollow arc-shaped support plate (1), and a cold water connecting pipe group (63) and a hot water connecting pipe group (74) are arranged in the hollow load-bearing bracket (8); the outlet of the water storage tank (61), the cold water connecting pipe group (63) and the cold water pipe group (62) are connected in sequence, and the outlet of the disc-type buried pipe (71), the hot water connecting pipe group (74) and the hot water pipe group (73) are connected in sequence.

4. The oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating according to claim 1 is characterized in that: It also includes a light-chasing system, which includes: A sunlight capture device (91) is used to collect sunlight signals and convert the sunlight signals into corresponding digital signals; a signal receiving processor (92), configured to generate a control signal based on the digital signal; An angle adjustment device (93) is arranged between the hollow arc-shaped support plate (1) and the CPC concentrator (2), and is connected to the signal receiving processor (92), and is used to adjust the focusing angle of the CPC concentrator (2) under the control of the control signal.

5. The oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating according to claim 1 is characterized in that: The upper end of the water discharge cavity (4) has a notch, and the arc-shaped photovoltaic cell group (3) is snapped into the notch of the water discharge cavity (4).

6. The oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating according to claim 1 is characterized in that: The inner wall of the water flow cavity (4) is provided with a plurality of water blocking plates (41) at intervals.

7. The oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating according to claim 1 is characterized in that: The outer wall of the water flow cavity (4) is coated with a graphene coating.

8. The oil transportation drag reduction system based on thermoelectric coupling continuous and uniform heating according to claim 1, The bottom of the water storage tank (61) is provided with a preheating chamber (611), and the outlet of the water discharge chamber (4) is connected to the preheating chamber (611).

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