Solar heating of crude oil storage and transportation tank

Abstract

The application provides a solar heating crude oil storage and transportation tank, and relates to the technical field of crude oil storage and transportation.The solar heating crude oil storage and transportation tank comprises a tank body, a solar photovoltaic photo-thermal device and a water tank, a plurality of buffer heat exchange partitions are arranged in the tank body along the axial direction, and an oil storage cavity is formed in the tank body; the buffer heat exchange partition is provided with a heat exchange part, the water tank is filled with circulating water, a heat exchange coil is arranged at the water outlet, a heat exchange pipeline enters the tank body and is connected with a heat exchange inlet; a reflux pipe is connected with the heat exchange outlet, and the reflux pipe is connected with the water tank through a reflux end; the application further comprises a controller, which is provided with a control program and is used for controlling the working of the solar heating crude oil storage and transportation tank. The circulating water in the heat exchange coil is heated by the heat energy generated by the solar photovoltaic photo-thermal device, and then the circulating water is introduced into the heat exchange part in the buffer heat exchange partition, so that the circulating water exchanges heat with the crude oil in the tank body, and the temperature of the crude oil in the tank body is maintained in a certain temperature range.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of crude oil storage and transportation, and particularly relates to a solar energy heating crude oil storage and transportation oil tank. BACKGROUND

[0002] Crude oil, also known as "black gold", is usually called crude oil directly extracted from oil wells without processing. It is a black-brown or dark green viscous liquid or semi-solid combustible substance composed of various hydrocarbons. There are oil reserves in some areas of the upper part of the earth's crust. It is composed of different carbon hydrogen compounds, and the main component is alkane. In addition, oil also contains elements such as sulfur, oxygen, nitrogen, phosphorus, and vanadium. It is soluble in many organic solvents and insoluble in water, but can form an emulsion with water. According to the density range, it is divided into light crude oil, medium crude oil and heavy crude oil. However, the composition and appearance of oil from different oil fields can vary greatly.

[0003] Crude oil is generally stored in oil storage tanks for transportation, but the existing oil storage tanks only have the function of storing crude oil. However, when the entire oil storage tank is in a low-temperature environment, the temperature of the crude oil inside the oil storage tank will be too low. When the crude oil is transported to the lower unit, the low-temperature crude oil needs to be heated before it can be used. Therefore, improvements need to be made to the oil storage tank to keep the crude oil at a certain temperature during transportation.

[0004] A constant temperature crude oil train tank based on solar heat preservation is disclosed in Chinese Patent No. CN202020057008.2, which comprises an oil storage tank, a support frame is arranged above the oil storage tank, a solar heat exchange plate is arranged above the support frame, the solar heat exchange plate is not larger than the support frame, the solar heat exchange plate comprises a plurality of heat exchange pipes, the plurality of heat exchange pipes extend along the radial direction of the oil storage tank and are arranged in sequence along the axial direction of the oil storage tank, the two ends of the heat exchange pipes are provided with water storage pipes, and the water storage pipes are connected with the plurality of heat exchange pipes to have good heat preservation effect. The solar heat exchange plate absorbs light energy in sunlight to heat the water in the heat exchange pipes, the heated water enters the heat preservation water layer of the oil storage tank through the water storage pipes and the flow guide pipes, and the low temperature water in the heat preservation water layer enters the heat exchange pipes through the flow guide pipes and the water storage pipes for heating. The solar controller 9 on the solar heat exchange plate converts light energy into electric energy through the solar power generation plate and stores it in the power storage box, and the electric power in the power storage box supplies the PLC controller, the temperature sensor and the electric control valve. The temperature sensor monitors the temperature in the heat preservation water layer, when the temperature is too high, the electric control valve is controlled by the PLC controller to reduce the water flow, and the exchange between the heat preservation water layer and the hot water in the heat exchange pipes is reduced, when the temperature is too low, the electric control valve is controlled by the PLC controller to increase the water flow, and the exchange between the heat preservation water layer and the hot water in the heat exchange pipes is increased. The device can make full use of solar energy, reduce external energy consumption, meet the requirements of energy saving and environmental protection, and meet the requirements of green and clean energy. The device is easy to heat crude oil by solar energy, but the internal structure of the crude oil tank is not improved, and the device operates by solar power generation, which is seriously limited by the environment, and the crude oil heating efficiency is limited, and the initial temperature of the crude oil cannot be effectively maintained in low temperature environment.

[0005] A solar heating device for crude oil storage tank with uniform heating is disclosed in Chinese Patent No. CN202022345253.6, which comprises a tank body, a support column is fixedly connected to the outer surface of the tank body, a heat preservation rock wool board is fixedly sleeved between the sides of the support column away from the tank body, a heat insulation shell is fixedly sleeved to the outer surface of the heat preservation rock wool board, and a heat storage cavity is formed between the inner wall of the heat preservation rock wool board and the outer wall of the tank body. The combination of the tank body, the stirring blade, the rotating rod, the driving motor, the water inlet valve, the one-way valve, the heat conducting pipe, the heat exchanger, the solar heat collecting plate, the water inlet pipe, the nozzle, the oil inlet pipe, the heat storage cavity, the heat preservation rock wool board, the heat insulation shell, the ion fan and the branch pipe has the advantages of energy saving, uniform heating and reduction of static electricity generation, solves the problems of complex structure, large energy consumption, inability to uniformly heat crude oil, poor heating effect, easy occurrence of fire caused by static electricity in dry weather and low safety. However, the heating efficiency of the device for crude oil is low, and it is difficult to maintain the initial temperature of the crude oil in low temperature environment. At the same time, when the speed of the transport vehicle changes, the crude oil will produce water hammer effect under the action of inertia, which will impact the tank body and cause damage to the inside of the tank body.

[0006] Therefore, in view of the fact that the existing oil storage tank cannot maintain the temperature of crude oil during transportation and cannot effectively prevent the impact of crude oil on the tank body, the application discloses a solar energy heating crude oil storage and transportation tank. SUMMARY

[0007] In view of the above problems, the application aims to provide a solar energy heating crude oil storage and transportation tank, which couples a solar energy device to heat crude oil in the tank body, so that the crude oil in the tank body is maintained at a certain initial temperature.

[0008] To achieve the above-mentioned purpose, the application provides the following technical solutions:

[0009] A solar energy heating crude oil storage and transportation tank, comprising a tank body, a solar photovoltaic photo-thermal device fixedly arranged above the tank body, and a water tank,

[0010] The tank body is provided with an oil inlet and an oil outlet, and a plurality of buffer heat exchange partitions are arranged in the tank body in the axial direction, so that a plurality of oil storage cavities are formed in the tank body between the buffer heat exchange partitions and the inner wall of the tank body; the oil storage cavities are used to store crude oil. The buffer heat exchange partition is provided with a heat exchange part, and the heat exchange part is provided with a heat exchange outlet and a heat exchange inlet; the heat exchange part is used to flow fluid, and the heated fluid flows through the heat exchange part and exchanges heat with the crude oil outside the buffer heat exchange partition, thereby heating the crude oil in the tank body and maintaining the temperature of the crude oil in the tank body within a certain temperature range.

[0011] The water tank is filled with circulating water, and the water tank is provided with a water outlet end and a backflow end; the circulating water flows out from the water outlet end, flows back into the water tank from the backflow end after flowing; the water outlet end is provided with a heat exchange coil connected with the solar photovoltaic photo-thermal device, one end of the heat exchange pipeline is connected with the end of the heat exchange coil, and the other end enters the tank body and is connected with the heat exchange inlet.

[0012] The heat exchange outlet is communicated with a backflow pipe, and the backflow pipe is communicated with the water tank through the backflow end. Therefore, the water flowing out of the water tank first flows through the heat exchange coil for heating, then enters the heat exchange pipeline, and then enters the tank body, flows into the heat exchange part through the heat exchange inlet, flows out of the heat exchange part, and flows into the water tank through the backflow pipe, thereby completing the circulation of the circulating water.

[0013] Further comprising a controller, which carries a control program and is used to control the operation of the solar energy heating crude oil storage and transportation tank.

[0014] Preferably, the solar photovoltaic photothermal device comprises a photothermal part for absorbing thermal energy in sunlight and a photovoltaic part for converting light energy into electrical energy; the heat exchange coil is fixedly connected with the photothermal part. After the photothermal part absorbs thermal energy in sunlight, the heat exchange coil is heated through heat conduction.

[0015] Preferably, a heat conduction part is arranged on the outer side of the heat exchange part, and the outer wall of the heat conduction part extends partially to form a plurality of heat exchange fins. The heat conduction part is a layer of heat conduction material arranged on the outer side of the heat exchange part, which can better conduct heat and reduce heat loss. The heat exchange fins increase the contact area with the crude oil, thereby improving the heat exchange efficiency between the crude oil and the circulating water. At the same time, the heat exchange fins can also assist in buffering the crude oil when it flows, effectively reducing the impact of the crude oil on the tank body.

[0016] Preferably, the angle between the heat exchange fin and the outer wall of the heat conduction part is α, where 30°≤α≤45°.

[0017] Preferably, the heat exchange part is a disc-shaped flow channel arranged inside the buffer heat exchange partition. The disc-shaped flow channel is arranged inside the buffer heat exchange partition in a mosquito coil shape. The disc-shaped flow channel increases the heat exchange area between the circulating water and the crude oil, thereby improving the heating efficiency of the crude oil.

[0018] Preferably, the heat exchange part comprises an upper heat exchange cavity and a lower heat exchange cavity that are in communication with each other, and the heat exchange inlet and the heat exchange outlet are arranged on the upper heat exchange cavity and the lower heat exchange cavity, respectively. The heated circulating water in the heat exchange coil first enters the upper heat exchange cavity through the heat exchange inlet, then enters the lower heat exchange cavity through the channel, until the circulating water fills the upper heat exchange cavity and the lower heat exchange cavity, and the heat exchange between the circulating water and the crude oil in the tank body is realized through the upper heat exchange cavity and the lower heat exchange cavity. By arranging the heat exchange cavities, the heat exchange area between the circulating water and the crude oil is increased, thereby improving the heating efficiency of the crude oil.

[0019] Preferably, a first temperature sensor is arranged in the heat exchange part, a second temperature sensor is arranged on the inner surface of the tank body, and an inlet electromagnetic valve and an outlet electromagnetic valve are arranged on the heat exchange inlet and the heat exchange outlet, respectively. The first temperature sensor and the second temperature sensor are used to detect the temperature of the heat exchange part and the crude oil in the tank body, respectively. The inlet electromagnetic valve and the outlet electromagnetic valve are used to control the opening and closing of the heat exchange inlet and the heat exchange outlet, respectively. When the inlet electromagnetic valve is opened and the outlet electromagnetic valve is closed, the circulating water in the heat exchange coil enters the heat exchange part. At this time, the circulating water in the heat exchange part exchanges heat with the crude oil in the tank body, and the temperature of the crude oil rises while the temperature of the circulating water decreases. When the outlet electromagnetic valve is opened, the cooled circulating water in the heat exchange part is discharged and flows back to the water tank. At the same time, the heated circulating water in the heat exchange coil enters the heat exchange part again through the inlet electromagnetic valve, thereby realizing the circulating heat exchange between the circulating water and the crude oil, and keeping the temperature of the crude oil within a certain temperature range.

[0020] Preferably, the first temperature sensor, the second temperature sensor, the inlet electromagnetic valve and the outlet electromagnetic valve are powered by the solar photovoltaic photothermal device.

[0021] Preferably, a spraying pipe in communication with the water tank is further arranged on the tank body, a spraying pump is arranged on the spraying pipe, and a plurality of spray heads are distributed on the spraying pipe. When the temperature of the surface of the tank body is too high, the spraying pump can be opened to transport the circulating water with a temperature lower than that of the surface of the tank body from the water tank to the spraying pipe and spray the circulating water to the surface of the tank body through the plurality of spray heads to cool the tank body.

[0022] Preferably, a third temperature sensor is arranged on the surface of the tank body and electrically connected with the spraying pump. The third temperature sensor is used to detect the temperature of the surface of the tank body.

[0023] Preferably, a heat preservation layer and a heat insulation layer are sequentially arranged on the outer wall of the tank body. The heat preservation layer is used to preserve heat of the tank body, and the heat insulation layer is used to insulate heat exchange between the tank body and the external low-temperature environment, so that the temperature of the crude oil in the tank body can be maintained in a certain temperature range.

[0024] Preferably, the tank body is provided with a mounting bracket, a plurality of connecting sockets are arranged on the mounting bracket, and the solar photovoltaic photothermal device is provided with a plug-in part matched with the connecting sockets. The solar photovoltaic photothermal device can be detachably mounted on the tank body.

[0025] Preferably, a staircase is arranged on the side surface of the mounting bracket. The staircase facilitates workers to climb to the top of the tank body for maintenance.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1. The heat energy generated by the solar photovoltaic photothermal device is used to heat the circulating water in the heat exchange coil, and then the circulating water is introduced into the heat exchange part in the buffer heat exchange partition, so that the circulating water exchanges heat with the crude oil in the tank body, thereby realizing heating of the crude oil in the tank body and maintaining the temperature of the crude oil in the tank body in a certain temperature range.

[0028] 2. A plurality of buffer heat exchange partitions with crude oil through holes are sequentially arranged in the tank body in the axial direction, and the crude oil is buffered by the buffer heat exchange partitions to avoid strong impact of the crude oil on the tank body.

[0029] 3. The solar photovoltaic photothermal device is coupled to heat the crude oil in the tank body, which effectively utilizes solar energy and reduces the energy consumption for heating the crude oil. At the same time, the electric energy generated by the solar photovoltaic photothermal device is used to drive the water supply pump, the backflow pump and other elements to work, thereby effectively reducing the operating energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure schematic diagram of the oil tank after oil injection of the solar heating crude oil storage and transportation oil tank of the present application;

[0031] Figure 2 It is a structure schematic diagram of the solar heating crude oil storage and transportation oil tank of the present application;

[0032] Figure 3 It is a structure schematic diagram of the solar heating crude oil storage and transportation oil tank of the present application; Figure 2 It is a sectional view in A-A direction of the present application;

[0033] Figure 4 It is a structure schematic diagram of the solar heating crude oil storage and transportation oil tank of the present application with upper and lower heat exchange cavities;

[0034] Figure 5 It is a structure schematic diagram of the solar heating crude oil storage and transportation oil tank of the present application; Figure 4 It is a partial schematic diagram in B-B direction of the present application;

[0035] Reference signs:

[0036] 1-tank body; 2-solar photovoltaic photo-thermal device; 3-water tank; 4-buffer heat exchange partition; 5-heat exchange coil;

[0037] 6-spraying pipe; 7-spraying head; 8-heat conduction part; 9-heat exchange fin; 10-heat exchange part. DETAILED DESCRIPTION

[0038] In order to make the purpose and technical scheme of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the embodiments of the present application.

[0039] In the description of the present application, it should be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] Embodiment 1

[0041] The present embodiment provides a solar heating crude oil storage and transportation oil tank, as shown in the figure, which comprises a tank body 1, a solar photovoltaic photo-thermal device 2 arranged at the top of the tank body 1, a water tank 3 arranged at the top of the tank body 1, and a controller (not shown) for receiving and sending signals and controlling the normal operation of the entire solar heating crude oil storage and transportation oil tank. Figures 1-5

[0042] ​The inside of the tank body 1 is sequentially provided with a plurality of buffer heat exchange partitions 4 in the axial direction. A plurality of oil storage cavities are formed between adjacent two buffer heat exchange partitions 4 and between the end buffer heat exchange partition 4 and the inner wall of the tank body 1, for storing crude oil. An oil injection port is arranged at the top of one end of the tank body 1. The inside of the tank body 1 is divided into a plurality of oil storage cavities in communication with each other by the plurality of buffer heat exchange partitions 4. An oil discharge port is arranged at the bottom of the tank body 1 corresponding to each oil storage cavity. Crude oil is injected into the inside of the tank body 1 through the oil injection port, and the crude oil in the inside of the tank body 1 is discharged through the oil discharge port. The crude oil can flow in the tank body through the crude oil through hole arranged at the center of the buffer heat exchange partition 4. The inside of the buffer heat exchange partition 4 is provided with a heat exchange part 10 with a heat exchange inlet and a heat exchange outlet. The heat exchange part 10 can accommodate fluid flow.

[0043] A solar photovoltaic photo-thermal device 2 is detachably mounted on the top of the tank body 1. The solar photovoltaic photo-thermal device 2 includes a photovoltaic part and a photo-thermal part. The photo-thermal part can absorb heat energy in sunlight. The photovoltaic part converts light energy into electric energy through photovoltaic effect to supply power to the entire device.

[0044] A water tank 3 is arranged at one side of the solar photovoltaic photo-thermal device 2 on the top of the tank body 1. The inside of the water tank 3 is filled with circulating water. The water tank 3 is provided with a water outlet end and a backflow end. The water outlet end is provided with a heat exchange coil 5 with a water supply pump. The heat exchange coil 5 is in a curved wave shape. The heat exchange coil 5 is heated by the solar photovoltaic photo-thermal device 2, and the temperature of the circulating water in the inside of the heat exchange coil 5 rises. The end of the heat exchange coil 5 is connected with a heat exchange pipeline. The other end of the heat exchange pipeline enters the tank body 1 and branches to be connected with the heat exchange inlets of the heat exchange parts 10 in the buffer heat exchange partitions 4. The heat exchange outlets of the heat exchange parts 10 are connected with the backflow end of the water tank 3 through a backflow pipeline with a backflow pump. The solar photovoltaic photo-thermal device 2 supplies power to the water supply pump and the backflow pump.

[0045] The heat exchange coil 5 is connected with the photo-thermal part of the solar photovoltaic photo-thermal device 2. The circulating water in the heat exchange coil 5 is heated by the photo-thermal part, so as to increase the temperature of the circulating water. The heated circulating water enters the heat exchange parts 10 in the buffer heat exchange partitions 4 through the heat exchange inlets. The circulating water enters the heat exchange parts 10, and then exchanges heat with the crude oil in the inside of the tank body 1, so as to heat the crude oil. The heated circulating water flows out of the heat exchange parts 10 through the outlets and flows back to the water tank 3 through the backflow pipeline for the next heat exchange cycle. At the same time, the crude oil in the inside of the tank body 1 can maintain a certain temperature through the continuous circulation and heat exchange of the circulating water. At the same time, the photovoltaic part of the solar photovoltaic photo-thermal device 2 generates electric energy to supply power to the water supply pump and the backflow pump, so as to save energy consumption.

[0046] The heat exchange part 10 is arranged inside the buffer heat exchange partition 4, so that the inside of the buffer heat exchange partition 4 is a cavity structure. When the speed of the transport vehicle changes, the crude oil in the tank body 1 flows and impacts the tank body 1 under the action of inertia, and the crude oil is buffered by the buffer heat exchange partition 4, and then enters the adjacent cavity through the crude oil through hole in the center of the buffer heat exchange partition 4, thereby reducing the direct impact of the crude oil on the tank body 1.

[0047] Embodiment 2

[0048] The technical scheme of the embodiment is basically the same as that of embodiment 1, and the difference between the embodiment and embodiment 1 is that:

[0049] As shown in Figure 2 , the heat exchange part 10 is arranged outside the heat conduction part 8, and the heat exchange fin 9 extending into the inside of the tank body 1 is arranged outside the heat conduction part 8, and the heat exchange fin 9 is arranged obliquely. The included angle between the heat exchange fin and the outer wall of the heat conduction part is α, and 30°≤α≤45°.

[0050] The heat conduction part 8 is a layer of heat conduction material arranged outside the heat exchange part 10, and the heat exchange fin 9 extending into the inside of the tank body 1 is arranged outside the heat conduction material layer, and the heat of the circulating water in the heat exchange part 10 is efficiently transferred to the heat exchange fin 9 through the heat conduction part 8, and the contact area with the crude oil is increased through the obliquely arranged heat exchange fin 9, thereby improving the heat exchange efficiency between the crude oil and the circulating water. At the same time, the obliquely arranged heat exchange fin 9 can also assist in buffering the crude oil when the crude oil flows, effectively reducing the impact of the crude oil on the tank body 1.

[0051] Embodiment 3

[0052] The embodiment is further optimized on the basis of the above-mentioned embodiment 1 or embodiment 2.

[0053] The heat exchange part 10 is arranged with a first temperature sensor, and the tank body 1 is arranged with a second temperature sensor; the heat exchange inlet of the heat exchange part 10 is provided with an inlet electromagnetic valve, and the heat exchange outlet of the heat exchange part 10 is provided with an outlet electromagnetic valve, and the solar photovoltaic photo-thermal device 2 supplies power to the first temperature sensor, the second temperature sensor, the inlet electromagnetic valve and the outlet electromagnetic valve. The temperature of the circulating water in the heat exchange part 10 is monitored by the first temperature sensor, and the temperature of the crude oil in the tank body 1 is monitored by the second temperature sensor, and the inlet electromagnetic valve and the outlet electromagnetic valve are respectively used to control the opening and closing of the heat exchange inlet and the heat exchange outlet.

[0054] When the inlet electromagnetic valve is opened and the outlet electromagnetic valve is closed, the circulating water in the heat exchange coil 5 enters the heat exchange part 10 and fills the heat exchange part 10, at this time, the circulating water in the heat exchange part 10 exchanges heat with the crude oil in the tank body 1, the temperature of the crude oil rises and the temperature of the circulating water decreases. When the temperature of the circulating water is higher than the temperature of the crude oil and the temperature difference is less than or equal to 1℃, at this time, the outlet electromagnetic valve is opened, the circulating water in the heat exchange part 10 is discharged and flows back to the water tank 3, and at the same time, the heated circulating water in the heat exchange coil 5 enters the heat exchange part 10 again through the inlet electromagnetic valve, thereby realizing the circulating heat exchange between the circulating water and the crude oil, so that the temperature of the crude oil is maintained in a certain temperature range.

[0055] At the same time, the electric energy for supplying the first temperature sensor, the second temperature sensor, the inlet electromagnetic valve and the outlet electromagnetic valve is provided by the photovoltaic part of the solar photovoltaic photo-thermal device 2, which effectively reduces the circulating energy consumption of the circulating water.

[0056] The other parts of the embodiment are the same as those of the above-mentioned embodiments 1 or 2, and will not be described again.

[0057] Embodiment 4

[0058] The embodiment is further optimized on the basis of any one of the above-mentioned embodiments 1-3.

[0059] As shown in Figure 3 The heat exchange part 10 is a disc-shaped flow channel arranged inside the buffer heat exchange partition plate 4, the disc-shaped flow channel is arranged in the inside of the buffer heat exchange partition plate 4 in a mosquito coil shape, the top end of the disc-shaped flow channel is provided with a heat exchange inlet, and the bottom end of the disc-shaped flow channel is provided with a heat exchange outlet. The heat exchange inlet of the disc-shaped flow channel is connected with the heat exchange pipeline, and the heat exchange outlet of the disc-shaped flow channel is connected with the backflow pipe. The arrow direction is the circulating water flow direction.

[0060] The heated circulating water in the heat exchange coil 5 enters the disc-shaped flow channel through the heat exchange inlet, and the disc-shaped flow channel increases the heat exchange area between the circulating water and the crude oil, thereby improving the heating efficiency of the crude oil.

[0061] The other parts of the embodiment are the same as those of any one of the above-mentioned embodiments 1-3, and will not be described again.

[0062] Embodiment 5

[0063] The embodiment is further optimized on the basis of any one of the above-mentioned embodiments 1-4.

[0064] As shown in Figure 5As shown, the heat exchange part 10 is a heat exchange cavity arranged inside the buffer heat exchange partition 4. The inside of the buffer heat exchange partition 4 is provided with an upper heat exchange cavity and a lower heat exchange cavity on the upper and lower sides of the crude oil through hole respectively. The upper heat exchange cavity and the lower heat exchange cavity are connected through a passage to form the heat exchange cavity. The top of the upper heat exchange cavity is provided with a heat exchange inlet, and the bottom of the lower heat exchange cavity is provided with a heat exchange outlet. The heat exchange inlet of the heat exchange cavity is connected with the heat exchange pipeline, and the heat exchange outlet of the heat exchange cavity is connected with the return pipe. The arrow direction is the circulating water flow direction.

[0065] The heated circulating water in the heat exchange coil 5 first enters the upper heat exchange cavity through the heat exchange inlet, and then enters the lower heat exchange cavity through the passage, until the circulating water fills the upper heat exchange cavity and the lower heat exchange cavity, and the heat exchange between the circulating water and the crude oil in the tank body 1 is realized through the upper heat exchange cavity and the lower heat exchange cavity. By arranging the heat exchange cavity, the heat exchange area between the circulating water and the crude oil is increased, and the heating efficiency of the crude oil is improved.

[0066] The other parts of the embodiment are the same as any one of the above embodiments 1-4, and will not be described again.

[0067] Embodiment 6

[0068] The embodiment is further optimized on the basis of any one of the above embodiments 1-5.

[0069] As shown in Figure 1 , Figure 2 , Figure 4 As shown, the top of the tank body 1 is further provided with a spraying pipe 6 with a spraying pump connected with the water tank 3, and a plurality of spray heads 7 are arranged on the spraying pipe 6 corresponding to the outside of the tank body 1. A third temperature sensor is arranged on the surface of the tank body 1, the third temperature sensor is connected with the spraying pump, and the solar photovoltaic photo-thermal device 2 supplies power to the third temperature sensor.

[0070] When the tank body 1 is in a high temperature environment, the crude oil in the tank body 1 itself maintains a certain temperature, and at this time, the crude oil does not need to be heated, and at this time, the water tank 3 does not input circulating water into the heat exchange coil 5. At the same time, when the ambient temperature is high, it is also necessary to reduce the temperature of the surface of the tank body 1 to avoid the surface temperature of the tank body 1 being too high. The third temperature sensor detects the temperature of the surface of the tank body 1, and when the temperature of the surface of the tank body 1 exceeds the high temperature preset value, the third temperature sensor sends a signal to the controller, and at this time, the controller controls the spraying pump to transport the circulating water in the water tank 3 with a temperature lower than that of the surface of the tank body 1 to the inside of the spraying pipe 6, and sprays it to the surface of the tank body 1 through the plurality of spray heads 7 to cool the tank body 1.

[0071] The other parts of the embodiment are the same as any one of the above embodiments 1-5, and will not be described again.

[0072] Embodiment 7

[0073] The embodiment is further optimized on the basis of any one of the above-mentioned embodiments 1-6.

[0074] The outer part of the tank body 1 is provided with a heat preservation layer, and the outer part of the heat preservation layer is provided with a heat insulation layer. When the external environment temperature is low, the photothermal part of the solar photovoltaic light and heat device 2 exchanges heat with the circulating water in the heat exchange coil 5, and the circulating water enters the heat exchange part 10 in the buffer heat exchange partition plate 4 through the heat insulation layer and the heat preservation layer. The tank body 1 is heat-preserved through the heat preservation layer, and at the same time, the heat exchange between the tank body 1 and the external low-temperature environment is isolated through the heat insulation layer, so that the temperature of the crude oil in the tank body 1 can be maintained within a certain temperature range.

[0075] The other parts of the embodiment are the same as any one of the above-mentioned embodiments 1-6, and will not be described again.

[0076] Embodiment 8

[0077] The embodiment is further optimized on the basis of any one of the above-mentioned embodiments 1-7.

[0078] The top of the tank body 1 is provided with a mounting rack, and the mounting rack is provided with a plurality of connecting sockets.

[0079] The mounting rack is welded on the top of the tank body 1, and one side of the mounting rack is provided with a staircase to facilitate workers to climb to the top of the tank body 1. The top of the mounting rack is provided with a plurality of connecting sockets, and the plug-in parts at the bottom of the solar photovoltaic light and heat device 2 are directly plugged into the connecting sockets, so as to realize the detachable installation of the solar photovoltaic light and heat device 2 on the top of the tank body 1. Then the plug-in parts can be locked in the connecting sockets through locking pins or locking nuts, so as to realize the fixation of the solar photovoltaic light and heat device 2 on the top of the tank body 1.

[0080] When the solar photovoltaic light and heat device 2 needs to be replaced or overhauled, the locking of the plug-in parts of the solar photovoltaic light and heat device 2 is released, and then the solar photovoltaic light and heat device 2 can be hoisted and taken off from the top of the tank body 1 for convenient replacement and maintenance work.

[0081] The other parts of the embodiment are the same as any one of the above-mentioned embodiments 1-7, and will not be described again.

[0082] The above is only some embodiments of the present application, which are described in detail, but it cannot be understood as a limitation on the scope of the present patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, some modifications and improvements can be made, and these obvious replacement forms belong to the protection scope of the present application.

Claims

1. A solar heating crude oil storage tank, characterized in that: it comprises a tank body, a solar photovoltaic and photo-thermal device fixedly arranged above the tank body, and a water tank; a plurality of buffer heat exchange partitions are arranged axially in the tank body, and a plurality of oil storage cavities are formed in the tank body between the buffer heat exchange partitions and the inner wall of the tank body; a heat exchange part is arranged in the buffer heat exchange partition, and the heat exchange part is provided with a heat exchange outlet and a heat exchange inlet; the water tank is filled with circulating water, and the water tank is provided with a water outlet end and a backflow end; the water outlet end is provided with a heat exchange coil connected with the solar photovoltaic and photo-thermal device; a heat exchange pipeline is connected with the end of the heat exchange coil and enters the tank body and is communicated with the heat exchange inlet; the heat exchange outlet is communicated with a backflow pipeline which is communicated with the water tank through the backflow end; a controller is further arranged, and the controller carries a control program and is used for controlling the solar heating crude oil storage tank to work; a heat conduction part is arranged on the outer side of the heat exchange part, and a plurality of heat exchange fins are obtained by locally extending the outer wall of the heat conduction part; the included angle between the heat exchange fin and the outer wall of the heat conduction part is α, and 30°≤α≤45°; the solar photovoltaic and photo-thermal device comprises a photo-thermal part and a photovoltaic part; the photo-thermal part is used for absorbing thermal energy in sunlight, and the photovoltaic part is used for converting light energy into electric energy; the heat exchange coil is fixedly connected with the photo-thermal part; the heat exchange part is a disc-shaped flow channel arranged in the buffer heat exchange partition and provided with a first temperature sensor; a second temperature sensor is arranged on the inner surface of the tank body; an inlet electromagnetic valve and an outlet electromagnetic valve are respectively arranged on the heat exchange inlet and the heat exchange outlet; the first temperature sensor, the second temperature sensor, the inlet electromagnetic valve and the outlet electromagnetic valve are all powered by the solar photovoltaic and photo-thermal device; a spraying pipeline which is communicated with the water tank is further arranged on the tank body, a spraying pump is arranged on the spraying pipeline, and a plurality of nozzles are distributed on the spraying pipeline; a third temperature sensor is arranged on the surface of the tank body, and the third temperature sensor is electrically connected with the spraying pump; when the tank body is in a high-temperature environment, the water tank does not input circulating water into the heat exchange coil; when the surface temperature of the tank body exceeds a high-temperature preset value, the controller controls the spraying pump and the nozzles to spray the circulating water which is lower than the surface temperature of the tank body to the surface of the tank body to cool the tank body. The heat exchange part comprises an upper heat exchange cavity and a lower heat exchange cavity which are communicated with each other, and the heat exchange inlet and the heat exchange outlet are arranged on the upper heat exchange cavity and the lower heat exchange cavity respectively. The outer wall of the tank body is sequentially provided with a heat preservation layer and a heat insulation layer. The tank body is provided with a mounting frame, a plurality of connection sockets are arranged on the mounting frame, and the solar photovoltaic and photo-thermal device is provided with a plug-in part matched with the connection sockets. A staircase is arranged on the side surface of the mounting frame. ​ ​ ​ ​ ​ ​ 2. A solar heated crude oil storage and transportation tank as claimed in claim 1, wherein: ​ 3. A solar heated crude oil storage and transportation tank as claimed in claim 1 or 2, wherein: ​ 4. A solar heated crude oil storage and transfer tank as defined in claim 1 wherein: ​ 5. A solar heated crude oil storage and transfer tank as defined in claim 4 wherein: ​

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