Crude oil heating device

Abstract

The utility model belongs to the field of crude oil heating, and particularly relates to a crude oil heating device which comprises an air energy heat pump, a water-oil heat exchanger, an air-oil heat exchanger, a solar hot air heat collector and a ground source heat exchanger. A heat exchanger tube pass is arranged in an inner cavity of the water-oil heat exchanger, the two ends of the heat exchanger tube pass are communicated with a heat exchanger oil conveying pipe, and the ground source heat exchanger is communicated with an air source evaporator copper pipe and used for evaporating refrigerants in a pipeline of the ground source heat exchanger and the air source evaporator copper pipe. The heat pump and other two heat sources can form a multi-source heating device, and the system keeps constant temperature through crude oil secondary heat exchange and phase change heat storage, is energy-saving, efficient and pollution-free, can adapt to cold weather, and is suitable for popularization.

Description

Technical Field

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

[0002] Most Chinese crude oils contain high levels of wax (high molecular weight alkanes) and are very viscous at room temperature, making transportation difficult. For example, Daqing crude oil, which accounts for about one-third of my country's production, contains about 26% wax and has a freezing point of 32 degrees Celsius. After the waxy crude oil is heated, the thermal motion of the crude oil molecules is enhanced and the mutual restraint between them is weakened. On the one hand, the liquid hydrocarbons become thinner and can dissolve more wax; on the other hand, the spongy wax structure becomes loose and disintegrated, and many small wax particles are formed and distributed in the liquid hydrocarbons. The solid hydrocarbons become a dispersed phase, and the liquid hydrocarbons become a continuous phase, and the crude oil can be transported along the pipeline. In the prior art, electric heating is mostly used to heat crude oil.

[0003] Chinese utility model patent CN201621471U discloses a dual-power crude oil electric heating device, which is mainly composed of a furnace body, an electric heating tube, and a temperature sensor. The characteristics are that the electric heating tubes are respectively placed in the central heating tube and in the double-layer outer heating tube of the double-layer structure, the central heating tube is placed in the outer heating tube, the two tubes are connected, the space between the two tubes is a heating medium container, and an annular heat dissipation isolation plate with oil holes is arranged on the upper and lower parts of the middle of the two tubes, and rectangular heat dissipation isolation plates are arranged alternately on the outer wall of the central heating tube and the inner wall of the outer heating tube opposite to the outer wall of the central heating tube, respectively, a connector is arranged between the outer heating tube and the furnace body, and an insulation layer is arranged on the inner wall of the furnace body. The inlet and outlet oil pipes are respectively arranged at the lower and upper parts of the furnace body, and pass through the furnace body and the insulation layer and the outer heating tube to communicate with the heating medium container. It has good thermal insulation, uniform crude oil heating, and high thermal efficiency, but the electric heating device still mainly relies on electric energy, and the energy consumption is still very large, resulting in a sharp increase in production costs.

[0004] Therefore, the technical problem that needs to be solved is to provide a new type of crude oil heating device that can use new energy to replace electrical energy to heat crude oil, thereby reducing energy consumption and production costs. Utility Model Content

[0005] The utility model proposes a crude oil heating device, which utilizes air heat energy, solar energy and geothermal energy in combination to replace electric energy to heat the crude oil, is energy-saving, highly efficient and pollution-free, has a low production cost, can adapt to cold weather, and solves the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A crude oil heating device comprises an air energy heat pump and a water-oil heat exchanger, wherein the water outlet pipe and the water inlet pipe of the air energy heat pump are both connected to the water-oil heat exchanger to form a closed heat exchange loop, the inner cavity of the water-oil heat exchanger is provided with a heat exchanger tube, both ends of the heat exchanger tube are connected to the heat exchanger oil pipeline, and also comprises a ground source heat exchanger connected to the copper tube of the air source evaporator for evaporating the refrigerant in its pipeline.

[0008] Preferably, the air source evaporator, compressor, coil heat exchanger and expansion valve of the air source heat pump are connected in sequence through pipelines to form a closed loop, the air source evaporator copper tube is arranged in the air source evaporator, and the water outlet pipe and water inlet pipe of the air source heat pump are connected to the water outlet and water inlet of the coil heat exchanger to exchange heat with hot water.

[0009] Preferably, a ground source heat exchanger copper tube is provided in the inner cavity of the ground source heat exchanger, and the inlet and outlet of the ground source heat exchanger copper tube are connected to the air source evaporator copper tube through a tee, and the air source evaporator copper tube is connected to a first solenoid valve, and the first solenoid valve is located between two tees, and the liquid inlet end and liquid outlet end of the ground source heat exchanger copper tube are respectively connected to a second solenoid valve and a third solenoid valve.

[0010] Preferably, it also includes an antifreeze circulation pump, multiple buried heat exchange tubes, an antifreeze return pipe and an antifreeze inlet pipe, one end of the antifreeze inlet pipe is connected to the liquid inlet of the ground source heat exchanger, and the other end is connected to the liquid outlet of the antifreeze circulation pump; one end of the antifreeze return pipe is connected to the liquid outlet of the ground source heat exchanger, and the other end is connected to the liquid inlet of the antifreeze circulation pump after passing through the inner cavities of the multiple buried heat exchange tubes.

[0011] Preferably, it also includes an air-oil heat exchanger, a solar hot air collector that can generate hot air, a hot air outlet duct and a hot air return duct, the two ends of the hot air outlet duct are respectively connected with the hot air outlet of the solar hot air collector and the hot air inlet of the air-oil heat exchanger, the air inlet of the hot air return duct is connected with the hot air outlet of the air-oil heat exchanger, the air outlet of the hot air return duct is connected with the inner cavity of each vacuum glass tube of the solar hot air collector, the hot air outlet duct is connected with a fan, the inner cavity of the air-oil heat exchanger is also provided with a heat exchanger pipe process, and the heat exchanger oil pipe is connected with the heat exchanger pipe processes in the air-oil heat exchanger and the water-oil heat exchanger in sequence through a flange.

[0012] Preferably, the crude oil inlet and the crude oil outlet of the oil pipeline of the heat exchanger are both connected to the crude oil main pipeline.

[0013] Preferably, the water inlet pipe is connected in sequence with a hot water storage tank and a hot water circulation pump, and a plurality of phase change heat storage rods are arranged in the hot water storage tank.

[0014] The beneficial effects of the utility model are:

[0015] The utility model includes an air energy heat pump, a water-oil heat exchanger, an air-oil heat exchanger, and a solar hot air collector that can generate hot air. The water outlet pipe and the water inlet pipe of the air energy heat pump are connected to the water-oil heat exchanger to form a closed heat exchange loop. The inner cavity of the water-oil heat exchanger is provided with a heat exchanger pipe, and both ends of the heat exchanger pipe are connected to the heat exchanger oil pipeline. It also includes a ground source heat exchanger connected to the copper tube of the air source evaporator and used for evaporating the refrigerant in its pipeline.

[0016] The hot air generated by the solar hot air collector goes through the shell side, and the hot air enters the inner cavity of the air-oil heat exchanger under the action of the fan. The heat energy of the inner cavity is transferred to the crude oil in the heat exchanger tube side of the inner cavity through the tube wall, thereby achieving the purpose of solar energy heating the crude oil. Then the hot air returns to the inner cavity of the vacuum tube through the hot air return pipe and is reheated together with the incoming air to continue to circulate and heat the crude oil.

[0017] The hot water heated by the air energy heat pump goes through the shell side, and then enters the inner cavity of the water-oil heat exchanger through the outlet pipe. The heat energy is transferred to the crude oil in the inner cavity of the heat exchanger tube through the tube wall, thereby achieving the purpose of air thermal energy heating the crude oil, heating the crude oil for the second time, and then the hot water flows back to the coil heat exchanger of the air energy heat pump through the return pipe and the hot water circulation pump to continue heating and recycling.

[0018] In cold winter weather, close the first solenoid valve, open the second solenoid valve and the third solenoid valve, connect the copper tube of the air source evaporator and the copper tube of the ground source heat exchanger, and the antifreeze in the antifreeze return pipe goes through the shell process. After being heated by the buried heat exchange tube, the antifreeze enters the inner cavity of the ground source heat exchanger through the antifreeze circulation pump and the antifreeze inlet pipe. The heat energy is transmitted to the refrigerant in the copper tube of the ground source heat exchanger through the tube wall, so that the refrigerant is no longer affected by the cold weather, can evaporate fully and then enter the compressor to work, which can achieve the ideal energy efficiency ratio. Then the antifreeze flows back to the buried heat exchange tube through the antifreeze return pipe for heating and recycling.

[0019] The heat sources of the utility model are solar hot wind, air energy and ground source energy heating. The heat pump and the other two heat sources can form a multi-source heating device. The crude oil is used for secondary heat exchange. The heat storage tank is used to store heat energy. The phase change heat storage rod has a small volume and a large heat storage capacity to keep the system water temperature balanced.

[0020] The utility model utilizes air heat energy, solar energy and geothermal energy in combination to replace electric energy to heat crude oil, which is energy-saving, highly efficient and pollution-free, has low production cost, can adapt to cold weather, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structural principle of the utility model.

[0022] Figure 2This is a schematic diagram of the connection principle of the antifreeze circulation pump of the utility model.

[0023] In the figure:

[0024] 1- air energy heat pump, 2- water-oil heat exchanger, 3- outlet pipe, 4- return pipe, 5- hot water circulation pump, 6- heat storage tank, 7- solar hot air collector, 8- hot air outlet pipe, 9- hot air return pipe, 10- air-oil heat exchanger, 11- fan, 12- heat exchanger oil pipeline, 121- crude oil import, 122- crude oil export, 13- ground source heat exchanger, 14- air source evaporator copper tube, 15- ground Source heat exchanger copper tube, 16-first solenoid valve, 17-second solenoid valve, 18-third solenoid valve, 19-antifreeze inlet pipe, 20-antifreeze return pipe, 21-antifreeze circulation pump, 22-underground heat exchange tube, 23-tee, 61-phase change heat storage rod, 101-air source evaporator, 24-heat exchanger pipe, 25-flange, 26-compressor, 27-coil heat exchanger, 28-expansion valve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figure 1-2 A crude oil heating device includes an air energy heat pump 1 and a water-oil heat exchanger 2. The water outlet pipe 3 and the water inlet pipe 4 of the air energy heat pump 1 are connected to the water-oil heat exchanger 2 to form a closed heat exchange loop. The inner cavity of the water-oil heat exchanger 2 is provided with a heat exchanger tube 24. Both ends of the heat exchanger tube 24 are connected to the heat exchanger oil pipeline 12. It also includes a ground source heat exchanger 13 connected to the air source evaporator copper tube 14 for evaporating the refrigerant in its pipeline.

[0027] The air source evaporator 101, compressor 26, coil heat exchanger 27 and expansion valve 28 of the air source heat pump 1 are connected in sequence through pipelines to form a closed loop. The air source evaporator copper tube 14 is arranged in the air source evaporator 101. The water outlet pipe 3 and the water inlet pipe 4 of the air source heat pump 1 are connected to the water outlet and the water inlet of the coil heat exchanger 27 to exchange heat with hot water.

[0028] The inner cavity of the ground source heat exchanger 13 is provided with a ground source heat exchanger copper tube 15, and the inlet and outlet of the ground source heat exchanger copper tube 15 are connected to the air source evaporator copper tube 14 through a tee 23. The air source evaporator copper tube 14 is connected with a first solenoid valve 16, and the first solenoid valve 16 is located between two tees 23. The liquid inlet and liquid outlet of the ground source heat exchanger copper tube 15 are respectively connected with a second solenoid valve 17 and a third solenoid valve 18. The water-oil heat exchanger 2, the air-oil heat exchanger 10 and the ground source heat exchanger 13 are all shell and tube heat exchangers. It should be noted that the air energy heat pump 1 and the buried heat exchange tube 22 are both prior art, and their internal detailed structures are not repeated.

[0029] It also includes an antifreeze circulation pump 21, a plurality of underground heat exchange pipes 22, an antifreeze return pipe 20 and an antifreeze inlet pipe 19. One end of the antifreeze inlet pipe 19 is connected to the inlet of the ground source heat exchanger 13, and the other end is connected to the outlet of the antifreeze circulation pump 21. One end of the antifreeze return pipe 20 is connected to the outlet of the ground source heat exchanger 13, and the other end is connected to the inlet of the antifreeze circulation pump 21 after passing through the inner cavity of the plurality of underground heat exchange pipes 22. When the antifreeze circulation pump 21 is not enabled, the first solenoid valve 16 is normally open, and the second solenoid valve 17 and the third solenoid valve 18 are normally closed. When the antifreeze circulation pump 21 is enabled, the first solenoid valve 16 is normally closed, and the second solenoid valve 17 and the third solenoid valve 18 are normally open. The hot water energy of the water-oil heat exchanger 2 comes from air energy in summer and from ground energy in winter.

[0030] It also includes an air-oil heat exchanger 10, a solar hot air collector 7 that can generate hot air, a hot air outlet pipe 8 and a hot air return pipe 9. The two ends of the hot air outlet pipe 8 are respectively connected to the hot air outlet of the solar hot air collector 7 and the hot air inlet of the air-oil heat exchanger 10. The air inlet of the hot air return pipe 9 is connected to the hot air outlet of the air-oil heat exchanger 10. The air outlet of the hot air return pipe 9 is connected to the inner cavity of each vacuum glass tube of the solar hot air collector 7. The hot air outlet pipe 8 is connected to a fan 11. The inner cavity of the air-oil heat exchanger 10 is also provided with a heat exchanger pipe 24. The heat exchanger oil delivery pipe 12 is sequentially connected to the air-oil heat exchanger 10 and the heat exchanger pipe 24 in the water-oil heat exchanger 2 through a flange 25. The crude oil inlet 121 and the crude oil outlet 122 of the heat exchanger oil delivery pipe 12 are both connected to the crude oil main pipeline. The crude oil flows through the heat exchanger oil pipeline 12 in turn through the heat exchanger tubes 24 in the air-oil heat exchanger 10 and the water-oil heat exchanger 2 for primary and secondary heat exchange.

[0031] The hot wind from the solar hot wind collector 7 passes through the wind-oil heat exchanger 10 to raise the temperature of the crude oil for the first time. The heated crude oil passes through the heat exchanger oil pipe 12 to enter the water-oil heat exchanger 2 again to continue heating up the crude oil to 55°C to 60°C.

[0032] The water inlet pipe 4 is connected to a hot water storage tank 6 and a hot water circulation pump 5 in sequence. A plurality of phase-change heat storage rods 61 are arranged in the hot water storage tank 6. The phase-change heat storage rods 61 are small in size and have a large heat storage capacity, so that the water temperature of the system is kept balanced.

[0033] Working principle:

[0034] The hot air generated by the solar hot air collector 7 goes through the shell side, and the hot air enters the inner cavity of the air-oil heat exchanger 10 under the action of the fan 11. The heat energy of the inner cavity is transmitted to the crude oil in the heat exchanger tube side 24 of the inner cavity through the tube wall, thereby achieving the purpose of solar energy heating the crude oil. Then the hot air returns to the vacuum tube cavity of the solar hot air collector 7 through the hot air return pipe 9 and continues to be heated and recycled together with the incoming air.

[0035] The hot water heated by the air energy heat pump 1 goes through the shell side, and the hot water enters the inner cavity of the water-oil heat exchanger 2 through the outlet pipe 3. The heat energy is transferred to the crude oil in the heat exchanger tube side 24 of the inner cavity through the tube wall, thereby achieving the purpose of heating the crude oil with air heat energy, heating the crude oil for the second time, and then the hot water flows back to the coil heat exchanger 27 of the air energy heat pump 1 through the return pipe 4 and the hot water circulation pump 5 to continue heating and recycling.

[0036] In cold winter weather, close the first solenoid valve 16, open the second solenoid valve 17 and the third solenoid valve 18, connect the air source evaporator copper tube 14 and the ground source heat exchanger copper tube 15, and the antifreeze in the antifreeze return pipe 20 goes through the shell side. After being heated by the buried heat exchange tube 22, the antifreeze enters the inner cavity of the ground source heat exchanger 13 through the antifreeze circulation pump 21 and the antifreeze inlet pipe 19. The heat energy is transferred to the refrigerant in the ground source heat exchanger copper tube 15 through the tube wall, so that the refrigerant is no longer affected by the cold weather, can evaporate fully and then enter the compressor to work, so as to achieve an ideal energy efficiency ratio. Then the antifreeze flows back to the buried heat exchange tube 22 through the antifreeze return pipe 20 for heating and recycling.

[0037] The heat sources of the utility model are solar hot wind, air energy and ground source energy heating. The heat pump and the other two heat sources can form a multi-source heating device. The crude oil is used for secondary heat exchange. The heat storage tank is used to store heat energy. The phase change heat storage rod has a small volume and a large heat storage capacity to keep the system water temperature balanced.

[0038] The utility model utilizes air heat energy, solar energy and geothermal energy in combination to replace electric energy to heat crude oil, which is energy-saving, highly efficient and pollution-free, has low production cost, can adapt to cold weather, and solves technical problems.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A crude oil heating device, comprising an air energy heat pump (1) and a water-oil heat exchanger (2), wherein the water outlet pipe (3) and the water inlet pipe (4) of the air energy heat pump (1) are both connected to the water-oil heat exchanger (2) to form a closed heat exchange loop, the inner cavity of the water-oil heat exchanger (2) is provided with a heat exchanger tube (24), and both ends of the heat exchanger tube (24) are connected to the heat exchanger oil delivery pipe (12), characterized in that: It also includes a ground source heat exchanger (13) connected to the air source evaporator copper tube (14) and used for evaporating the refrigerant in its pipeline.

2. The crude oil heating device according to claim 1, characterized in that: The air source evaporator (101), the compressor (26), the coil heat exchanger (27) and the expansion valve (28) of the air source heat pump (1) are connected in sequence through pipelines to form a closed loop; the air source evaporator copper tube (14) is arranged in the air source evaporator (101); the water outlet pipe (3) and the water inlet pipe (4) of the air source heat pump (1) are both connected to the water outlet and the water inlet of the coil heat exchanger (27) to exchange heat with hot water.

3. The crude oil heating device according to claim 2, characterized in that: The inner cavity of the ground source heat exchanger (13) is provided with a ground source heat exchanger copper tube (15); the inlet and outlet of the ground source heat exchanger copper tube (15) are both connected to the air source evaporator copper tube (14) through a tee (23); the air source evaporator copper tube (14) is connected to a first solenoid valve (16); the first solenoid valve (16) is located between two tees (23); the liquid inlet end and the liquid outlet end of the ground source heat exchanger copper tube (15) are respectively connected to a second solenoid valve (17) and a third solenoid valve (18).

4. The crude oil heating device according to claim 3, characterized in that: It also includes an antifreeze liquid circulation pump (21), a plurality of underground heat exchange pipes (22), an antifreeze liquid return pipe (20) and an antifreeze liquid inlet pipe (19); one end of the antifreeze liquid inlet pipe (19) is connected to the liquid inlet of the ground source heat exchanger (13), and the other end is connected to the liquid outlet of the antifreeze liquid circulation pump (21); one end of the antifreeze liquid return pipe (20) is connected to the liquid outlet of the ground source heat exchanger (13), and the other end is connected to the liquid inlet of the antifreeze liquid circulation pump (21) after passing through the inner cavities of the plurality of underground heat exchange pipes (22).

5. The crude oil heating device according to claim 4, characterized in that: The invention also comprises an air-oil heat exchanger (10), a solar hot air collector (7) capable of generating hot air, a hot air outlet pipe (8) and a hot air return pipe (9); the two ends of the hot air outlet pipe (8) are respectively connected to the hot air outlet of the solar hot air collector (7) and the hot air inlet of the air-oil heat exchanger (10); the air inlet of the hot air return pipe (9) is connected to the hot air outlet of the air-oil heat exchanger (10); the air outlet of the hot air return pipe (9) is connected to the inner cavity of each vacuum glass tube of the solar hot air collector (7); the hot air outlet pipe (8) is connected to a fan (11); the inner cavity of the air-oil heat exchanger (10) is also provided with a heat exchanger pipe passage (24); the heat exchanger oil delivery pipe (12) is connected to the air-oil heat exchanger (10) and the heat exchanger pipe passage (24) in the water-oil heat exchanger (2) in sequence through a flange (25).

6. The crude oil heating device according to claim 5, characterized in that: The crude oil inlet (121) and the crude oil outlet (122) of the heat exchanger oil delivery pipe (12) are both connected to the crude oil main pipeline.

7. The crude oil heating device according to claim 6, characterized in that: The water inlet pipe (4) is connected in sequence to a hot water storage tank (6) and a hot water circulation pump (5), and a plurality of phase-change heat storage rods (61) are arranged in the hot water storage tank (6).

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