Composite heat reservoir

Abstract

The utility model discloses a composite heat reservoir which comprises a composite heat reservoir main body, heat storage liquid is arranged in the composite heat reservoir main body, the composite heat reservoir main body is provided with an oil inlet pipeline, an oil outlet pipeline, a heat storage liquid outlet pipeline and a heat storage liquid inlet, and a heating coil is arranged in the composite heat reservoir main body. Two ports of the heating coil are respectively connected with an oil inlet pipeline and an oil outlet pipeline, and at least one electric heating pipe group is also arranged; and the electric heating pipe group is erected from the upper end of the composite heat reservoir main body and extends into the gap of the heating coil. The electric heating pipe is erected on the composite heat reservoir body, when the electric heating pipe breaks down, the fault can be eliminated by directly replacing the electric heating pipe, then the broken-down electric heating pipe is repaired, and oil field production cannot be affected.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field green energy, in particular to a composite heat store. Background Art

[0002] Green energy used in oilfield production includes solar power generation, solar thermal energy, and wind power generation. The lack of continuous and reliable energy supply has caused difficulties in the use of green energy. To solve this problem, one is to store the generated heat through a heat storage medium, and the other is to perform electric auxiliary heating after the stored heat is consumed to maintain the temperature of the heat storage liquid.

[0003] Announcement No.: CN207019521U discloses a heat storage and release device. The prior art performs electric heating by means of an electric auxiliary heating device arranged at the bottom of the shell. When the electric auxiliary heating device fails, it is difficult to repair.

[0004] Publication No.: CN116817650A discloses a heat storage system device and method. The prior art heats the device by means of an electric heater, which is arranged opposite to the coil. The electric heating actuator passes through the shell, and it is difficult to repair the electric heater when it fails.

[0005] Publication No.: CN112696962A, discloses a heat pipe type phase change heat storage tank, wherein two electric heating pipes are arranged, respectively located above and below the coil, and the electric heating pipes pass through the shell, and it is difficult to repair the electric heating pipes when they fail.

[0006] In short, the technical solutions of the above-disclosed technologies, the technical problems to be solved and the beneficial effects produced are all different from the present utility model. Regarding more technical features, technical problems to be solved and the beneficial effects of the present utility model, there is no technical inspiration in the above-disclosed technical documents. Utility Model Content

[0007] In view of the above-mentioned defects in the prior art, the purpose of the utility model is to provide a composite heat storage, which makes the electric heating tube easy to replace and maintain.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A composite heat storage comprises a composite heat storage body, wherein a heat storage liquid is arranged in the composite heat storage body, wherein the composite heat storage body is provided with an oil inlet pipeline, an oil outlet pipeline, a heat storage liquid outlet pipeline, and a heat storage liquid inlet, wherein a heating coil is arranged in the composite heat storage body, wherein two ends of the heating coil are respectively connected to the oil inlet pipeline and the oil outlet pipeline, and wherein at least one electric heating pipe group is also arranged; wherein the electric heating pipe group is erected from the upper end of the composite heat storage body, and wherein the electric heating pipe group extends into the gap of the heating coil.

[0010] Furthermore, an electric heating port is provided on the top of the composite heat storage body, and an electric heating tube group is installed in each electric heating port. The electric heating tube group includes at least two U-shaped fin electric heating tubes, and an electric heating rain cover is provided on the electric heating port.

[0011] Furthermore, the composite heat storage body contains heat storage liquid and lipid phase change balls having the same density as the heat storage liquid.

[0012] Furthermore, the lipid phase change ball comprises a high-density polyethylene shell, a high-density polyethylene plug is arranged on the high-density polyethylene shell, and the high-density polyethylene shell is filled with lipid phase change material and stainless steel powder;

[0013] Specifically, the density of lipid phase change material < the density of thermal storage liquid < the density of stainless steel powder.

[0014] Furthermore, the heating coil is made of stainless steel pipe, and annular fins are distributed on the surface of the coil;

[0015] Specifically, the gap between adjacent fins in the heating coil is less than half of the diameter of the lipid phase change ball, and the gap between the outer diameters of the fins in the heating coil is greater than the diameter of the lipid phase change ball;

[0016] Specifically, the coils in the heating coil are formed into at least two layers by U-shaped elbows;

[0017] Specifically, a heating coil support frame is arranged inside the composite heat storage body and is inserted under each layer of the heating coil.

[0018] Furthermore, the oil inlet pipeline, the oil outlet pipeline, and the heat storage liquid outlet pipeline are arranged on the left wall of the composite heat storage body, and the heat storage liquid outlet pipeline is located at the lower end of the left wall of the composite heat storage body;

[0019] Specifically, the heat storage liquid inlet is connected to the top of the composite heat storage body through the third short section;

[0020] Specifically, an oil inlet gate is provided on the oil inlet pipeline;

[0021] Specifically, an oil outlet gate is provided on the oil outlet pipeline;

[0022] Specifically, a thermal storage liquid outlet gate is provided on the thermal storage liquid outlet pipeline;

[0023] Specifically, the oil inlet pipeline and the oil outlet pipeline are connected through a bypass pipeline outside the oil inlet gate and the oil outlet gate, and a bypass gate is provided on the bypass pipeline;

[0024] Specifically, a first filter is provided in the heat storage liquid outlet pipe inside the composite heat storage body.

[0025] Further, the thermal storage liquid outlet gate is connected to a pump;

[0026] Specifically, the front flexible pipe of the pump is connected to the thermal storage liquid outlet gate, and the rear flexible pipe of the pump is used to connect to the thermal storage liquid inlet of the green energy heating device.

[0027] Furthermore, a manhole is provided on the top of the composite heat storage body, and a manhole cover is provided on the manhole;

[0028] Specifically, the composite heat storage body is also provided with an overflow pipe gate and a vent pipe gate;

[0029] Specifically, the overflow pipe gate is a threaded ball valve, which is connected to the upper part of the left wall of the composite heat storage body through the first short section, and the overflow pipe gate is in a normally open state;

[0030] Specifically, the vent pipe gate is a threaded ball valve, which is connected to the bottom of the composite heat storage body through the second short section, and the vent pipe gate is in a normally closed state;

[0031] Specifically, a second filter is provided in the second short section inside the composite heat storage body.

[0032] Furthermore, a partition net group is arranged inside the main body of the composite heat storage, including a front partition net and a rear partition net, which are respectively located at the front side and the rear side of the heating coil;

[0033] Specifically, the left and right sides and bottom edges of the front and rear partition nets are fixed to the inner wall of the composite heat storage body by bolts, the middle is connected to the side edge of the heating coil by a threaded clip, and the top edge is flush with the center line of the overflow pipe gate.

[0034] Furthermore, the electric heating port is a rectangular hole, three of which are arranged in parallel and equidistantly, and are divided into a front electric heating port, a middle electric heating port, and a rear electric heating port;

[0035] Specifically, the front electric heating port is provided with a front electric heating tube group, the middle electric heating port is provided with a middle electric heating tube group, and the rear electric heating port is provided with a rear electric heating tube group;

[0036] Specifically, the front electric heating port is provided with a front electric heating rain cover, the middle electric heating port is provided with a middle electric heating rain cover, and the rear electric heating port is provided with a rear electric heating rain cover;

[0037] Specifically, the electric heating port and the manhole are arranged in the middle of the top of the composite heat storage body, the manhole is on the right side of the electric heating port, and the manhole cover does not interfere with the electric heating rain cover;

[0038] Specifically, the front electric heating port and the rear electric heating port are of equal length;

[0039] Specifically, a ladder is provided on the right wall of the composite heat storage body.

[0040] Furthermore, the first filter screen and the second filter screen are both made of stainless steel wire and are in a stepped cylindrical shape;

[0041] Specifically, the electrically heated rain shield is made of a lightweight insulating material;

[0042] Specifically, the separation net group is made of stainless steel wire;

[0043] Specifically, the manhole cover is circular, with a hollow heat-insulating structure, and both the inside and outside are made of stainless steel;

[0044] Specifically, the ladder is made of section steel.

[0045] Furthermore, a data detection and control system is also provided, which includes a temperature and liquid level integrated sensor, an oil inlet temperature and pressure integrated transmitter, an oil outlet temperature and pressure integrated transmitter, a liquid level meter, a heat storage liquid inlet temperature sensor, and an intelligent control box;

[0046] Specifically, the temperature and liquid level integrated sensor is mounted on the manhole cover;

[0047] Specifically, the oil inlet temperature and pressure integrated transmitter is arranged on the oil inlet pipeline outside the oil inlet gate;

[0048] Specifically, the oil outlet temperature and pressure integrated transmitter is arranged on the oil outlet pipeline outside the oil outlet gate;

[0049] Specifically, the liquid level meter includes an upper cock valve, a transparent tube, and a lower cock valve connected in sequence, and the liquid level meter is installed on the side of the composite heat storage body, and the upper cock valve and the lower cock valve are both connected to the inside of the composite heat storage body;

[0050] Specifically, the heat storage liquid inlet temperature sensor is arranged on a heat storage liquid delivery pipeline connected to the heat storage liquid inlet;

[0051] Specifically, the thermal storage liquid outlet temperature sensor is arranged on the rear flexible pipe;

[0052] Specifically, the intelligent control box is arranged on the side wall of the composite heat storage body, and the intelligent control box is provided with a display screen, an intelligent control module, a data line group, and a communication module;

[0053] Specifically, the intelligent control module is connected to the temperature and liquid level integrated sensor, the oil inlet temperature and pressure integrated transmitter, the oil outlet temperature and pressure integrated transmitter, and the thermal storage liquid inlet temperature sensor through a data line group, and the intelligent control module is connected to the network through a communication module;

[0054] Specifically, the intelligent control box is also provided with power guarantee equipment, including a multifunctional air switch, a mains complementary controller, a relay group, a power line group, an electric meter, and a switching power supply, which are used to supply power to the electric heating tube group.

[0055] Furthermore, it is characterized in that the main body of the composite heat storage is a box structure with a square end face;

[0056] Specifically, the composite heat storage body comprises an outer stainless steel shell and an inner stainless steel shell, a fire-resistant insulation board is arranged between the outer stainless steel shell and the inner stainless steel shell, and a stainless steel tie rod group is arranged in the inner stainless steel shell.

[0057] Compared with the prior art, the utility model has the following beneficial effects:

[0058] 1. The electric heating tube of the utility model is mounted on the main body of the composite heat storage. When the electric heating tube fails, the failure can be eliminated by directly replacing the electric heating tube, and then the failed electric heating tube can be repaired, which will not affect the oil field production.

[0059] 2. The utility model adds lipid phase change spheres of equal density to the heat storage liquid to improve the heat storage capacity of the heat storage liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a cross-sectional view of a composite heat storage of the utility model;

[0061] Figure 2 It is a top view of a composite heat storage of the utility model;

[0062] Figure 3 It is a cross-sectional view of the lipid phase change sphere in the utility model;

[0063] Figure 4 It is a structural schematic diagram of the oil well heating process in the utility model;

[0064] Figure 5 It is a structural schematic diagram of the partition net in the utility model;

[0065] Figure 6 It is a structural schematic diagram of the electric heating tube group and accessories in the utility model;

[0066] Figure 7 It is a structural schematic diagram of the intelligent control box in the utility model;

[0067] Figure 8 It is a schematic diagram of the temperature intelligent control block of the utility model.

[0068] In the figure, 1-composite heat storage body, 1-1-outer stainless steel shell, 1-2-refractory insulation board, 1-3-inner stainless steel shell, 1-4-stainless steel tie rod group;

[0069] 2-overflow pipe gate, 3-vent pipe gate, 4-heat storage liquid inlet;

[0070] 5-lipid phase change sphere, 5-1-high-density polyethylene shell, 5-2-high-density polyethylene plug, 5-3 lipid phase change material, 5-4-stainless steel powder;

[0071] 6-intelligent control box, 6-1-display screen, 6-2-intelligent control module, 6-3-air switch, 6-4-mains complementary controller, 6-5-relay group, 6-6-power line group, 6-7-data line group, 6-8-electricity meter, 6-9-communication module, 6-10-switching power supply;

[0072] 7-electric heating rain cover, 8-oil inlet gate, 9-oil outlet gate, 10-thermal storage liquid outlet gate;

[0073] 11-pump, 11-1-front flexible pipe, 11-2-rear flexible pipe;

[0074] 12-temperature and liquid level integrated sensor, 13-manhole cover;

[0075] 14-oil inlet temperature and pressure integrated transmitter, 14-1-first test short section, 14-2-first test gate, 14-3-first temperature and pressure integrated transmitter body, 14-4-first data line, 14-5-first patch temperature sensor;

[0076] 15-oil outlet temperature and pressure integrated transmitter, 15-1-second test short section, 15-2-second gate, 15-3-second temperature and pressure integrated transmitter body, 15-4-second data line, 15-5-second patch temperature sensor;

[0077] 16-heating coil, 17-heating coil support frame;

[0078] 18-separation net group, 18-1-front separation net, 18-2-rear separation net;

[0079] 19-electric heating tube group, 19-1-rear electric heating tube group, 19-2-middle electric heating tube group, 19-3-front electric heating tube group;

[0080] 20-ladder;

[0081] 21-Liquid level gauge, 21-1-Upper cock valve, 21-2-Transparent tube, 21-3-Lower cock valve;

[0082] 22-heat storage liquid inlet temperature sensor, 23-heat storage liquid outlet temperature sensor, 24-bypass gate; 25-second filter. DETAILED DESCRIPTION

[0083] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0084] Embodiment 1:

[0085] See also Figures 1 to 6 The utility model provides a composite heat storage including a composite heat storage body 1, wherein the composite heat storage body 1 is a box structure with a square end face, and the composite heat storage body 1 contains a heat storage liquid and lipid phase change balls 5 having the same density as the heat storage liquid.

[0086] Specifically, the composite heat storage body 1 includes an outer stainless steel shell 1-1 and an inner stainless steel shell 1-3, a fire-resistant insulation board 1-2 is arranged between the outer stainless steel shell 1-1 and the inner stainless steel shell 1-3, and a stainless steel tie rod group 1-4 is arranged in the inner stainless steel shell 1-3.

[0087] Wherein, the outer stainless steel shell 1-1 prevents corrosion from air and acid rain;

[0088] Among them, the fire-resistant insulation board 1-2 is flame-retardant and heat-insulating, reducing heat loss;

[0089] Among them, the inner stainless steel shell 1-3 prevents corrosion of the thermal storage liquid;

[0090] The stainless steel tie rod groups 1-4 prevent the composite heat storage body 1 from being deformed and damaged due to load.

[0091] Specifically, the lipid phase change ball 5 includes a high-density polyethylene shell 5-1, on which a high-density polyethylene plug 5-2 is arranged, and the high-density polyethylene shell 5-1 is filled with lipid phase change material 5-3 and stainless steel powder 5-4, and the high-density polyethylene plug 5-2 and the high-density polyethylene shell 5-1 are fused together by hot-melt technology. The density of the lipid phase change ball 5 is consistent with that of the thermal storage liquid, and it can be suspended at any depth of the thermal storage liquid.

[0092] The density of the lipid phase change material is less than the density of the thermal storage liquid and less than the density of the stainless steel powder 5-4. The lipid phase change material and the stainless steel powder 5-4 can adjust the density of the lipid phase change ball 5 to the same as the density of the thermal storage liquid. Specifically, the thermal storage liquid is pure water with a density of 1 g / cm 3 The lipid phase change material is 200 type industrial stearic acid which is solid at room temperature and has a density of 0.847g / cm 3 , stainless steel powder 5-4 is 304 stainless steel powder, density is 7.93g / cm 3 .

[0093] The left wall of the composite heat storage body 1 is provided with an oil inlet pipeline, an oil outlet pipeline, and a heat storage liquid outlet pipeline. The oil inlet pipeline is provided with an oil inlet gate 8, the oil outlet pipeline is provided with an oil outlet gate 9, and the heat storage liquid outlet pipeline is provided with a heat storage liquid outlet gate 10. The heat storage liquid outlet pipeline is located at the lower end of the left wall of the composite heat storage body 1. A first filter is provided in the heat storage liquid outlet pipeline inside the composite heat storage body 1. The first filter is made of stainless steel wire and is in a stepped cylindrical shape. The thin end is inserted into the heat storage liquid outlet pipeline to prevent the lipid phase change balls 5 from being discharged from the composite heat storage body 1 with the heat storage liquid; the oil inlet pipeline and the oil outlet pipeline are connected through a bypass pipeline outside the oil inlet gate 8 and the oil outlet gate 9, and a bypass gate 24 is provided on the bypass pipeline. The heat storage liquid outlet pipeline is the channel for the heat storage liquid to leave the composite heat storage body 1 and enter green energy heating devices such as solar heaters and wind heat heaters; when the composite heat storage is overhauled or shut down, the bypass gate 24 is opened and the oil well pipeline inlet gate 8 and the oil well pipeline outlet gate 9 are closed.

[0094] The heat storage liquid outlet gate 10 is connected to the heat storage liquid inlet of a green energy heating device such as a solar heater or a wind heating heater through a pump 11. The pump 11 realizes the circulation of the heat storage liquid. The front flexible pipe 11-1 of the pump 11 is connected to the heat storage liquid outlet gate 10, and the rear flexible pipe 11-2 of the pump 11 is connected to the heat storage liquid inlet of the green energy heating device. Flexible pipes are used before and after the pump 11 to facilitate process connection.

[0095] A heating coil 16 is arranged inside the composite heat storage body 1, and the two ports of the heating coil 16 are connected to the oil inlet pipeline and the oil outlet pipeline respectively. The heating coil 16 is made of stainless steel pipe, and annular fins are distributed on the surface of the coil to increase the heating area and improve the heat exchange efficiency. The gap between adjacent fins in the heating coil 16 is less than half of the diameter of the lipid phase change ball 5, and the gap between the outer diameters of the fins in the heating coil 16 is greater than the diameter of the lipid phase change ball 5, so that the lipid phase change ball 5 can be suspended and passed. The coils in the heating coil 16 are formed into at least two layers by U-shaped elbows, and a heating coil support frame 17 is arranged inside the composite heat storage body 1, which is inserted under each layer of the heating coil 16 to ensure that the heating coil 16 is in a stable state.

[0096] At least one electric heating port is arranged on the top of the composite heat storage body 1, and an electric heating tube group 19 is arranged in the electric heating port. The electric heating tube group 19 extends into the coil gap of the heating coil 16. The electric heating tube group 19 includes at least two U-shaped fin electric heating tubes. An electric heating rain cover 7 is arranged on the electric heating port, and the electric heating rain cover 7 is made of lightweight insulating materials such as fiber reinforced plastics.

[0097] The composite heat storage body 1 is provided with a separation net group 18, which is made of stainless steel wire and includes a front separation net 18-1 and a rear separation net 18-2, which are respectively located at the front and rear sides of the heating coil 16. The left and right sides and bottom sides of the front separation net 18-1 and the rear separation net 18-2 are bolted to the stainless steel shell 1-3 and the upper side of the composite heat storage body 1, and the middle is connected to the threaded clip on the side of the heating coil 16, which not only fixes the separation net but also increases the heat conduction area; the top edge is flush with the center line of the overflow pipe gate 2, and the gap between the top edge of the separation net and the top surface of the stainless steel shell in the composite heat storage body 1 can be used to collect lipid phase change balls 5. The separation net group 18 distributes the lipid phase change balls 5 in three areas to avoid concentrating near the thermal storage liquid outlet gate 10.

[0098] A manhole A is provided on the middle right side of the top surface of the composite heat storage body 1. The manhole A is used for personnel to enter and exit the composite heat storage body 1, inspect and maintain internal facilities, and add or remove lipid phase change balls 5 to meet different heat storage requirements. A manhole cover 13 is provided on the manhole A. The manhole cover 13 is circular, has a hollow insulation structure, and is made of stainless steel inside and outside to seal the manhole A.

[0099] A composite heat storage also includes an overflow pipe gate 2, a venting pipe gate 3, and a heat storage liquid inlet 4.

[0100] Among them, the overflow pipe gate 2 is a threaded ball valve, which is connected to the upper part of the composite heat storage body 1 through the first short section, and the overflow pipe gate 2 is normally open; when too much heat storage liquid is added and the heating coil 16 is perforated, it overflows from the composite heat storage body 1 to avoid pressure damage to the composite heat storage body 1.

[0101] The vent pipe gate 3 is a threaded ball valve, which is connected to the bottom of the composite heat storage body 1 through the second short section, and the vent pipe gate 3 is normally closed. A second filter screen 25 is provided in the second short section inside the composite heat storage body 1. The second filter screen 25 is made of stainless steel wire and is in a stepped cylindrical shape. The thin end is inserted into the second short section. When the composite heat storage is out of service for a long time or needs internal maintenance, the vent pipe gate 3 is opened for emptying.

[0102] Among them, the heat storage liquid inlet 4 is connected to the top of the composite heat storage body 1 through the third short section. It is the channel for the heated heat storage liquid of the solar heater, wind heat heater, etc. to enter the composite heat storage body 1, and is located at the front right top corner of the composite heat storage body 1.

[0103] Embodiment 2:

[0104] Based on Example 1, specifically, the coils in the heating coil 16 can form two layers through the cycle of downward bending, flat bending, upward bending, and flat bending, and can form three layers through the cycle of downward bending, downward bending, flat bending, upward bending, upward bending, and flat bending, and more layers can also be set.

[0105] Specifically, the electric heating port is a rectangular hole, three of which are arranged in parallel and equidistantly, and are divided into a front electric heating port, a middle electric heating port, and a rear electric heating port;

[0106] Among them, the front electric heating port is provided with a front electric heating tube group 19-3, the middle electric heating port is provided with a middle electric heating tube group 19-2, and the rear electric heating port is provided with a rear electric heating tube group 19-1;

[0107] Among them, the front electric heating port is provided with a front electric heating rain cover, the middle electric heating port is provided with a middle electric heating rain cover, and the rear electric heating port is provided with a rear electric heating rain cover.

[0108] Among them, the electric heating port and the manhole A are arranged in the middle of the top of the composite heat storage body 1, the manhole A is on the right side of the electric heating port, and the manhole cover 13 does not interfere with the electric heating rain cover.

[0109] Among them, the front electric heating port and the rear electric heating port are of equal length, and the middle electric heating port is shorter because it is located on the left side of the manhole A.

[0110] Specifically, a ladder 20 is provided on the right wall of the composite heat storage body 1. The ladder 20 is made of steel and is close to the manhole A for the convenience of people going up and down.

[0111] like Figure 7 As shown, a composite heat storage is also provided with a data detection and control system, which includes a temperature and liquid level integrated sensor 12, an oil inlet temperature and pressure integrated transmitter 14, an oil outlet temperature and pressure integrated transmitter 15, a liquid level meter 21, a heat storage liquid inlet temperature sensor 22, and an intelligent control box 6.

[0112] The temperature-liquid-level integrated sensor 12 is mounted on the manhole cover 13 , and the temperature-liquid-level integrated sensor 12 realizes real-time detection and transmission of the temperature and liquid level in the composite heat storage body 1 .

[0113] The oil inlet temperature and pressure integrated transmitter 14 includes a first test nipple 14-1 and a first temperature and pressure integrated transmitter body 14-3. The first test nipple 14-1 is connected to the oil inlet pipeline outside the oil inlet gate 8. The first temperature and pressure integrated transmitter body 14-3 is arranged at the other end of the first test nipple 14-1. The first test gate 14-2 is arranged on the first test nipple 14-1. The first temperature and pressure integrated transmitter body 14-3 is connected to a first patch temperature sensor 14-5 through a first data line 14-4. The first patch temperature sensor 14-5 is attached to the oil inlet pipeline. The oil inlet temperature and pressure integrated transmitter 14 displays and remotely transmits the inlet temperature and pressure of the oil well pipeline in real time.

[0114] The oil outlet temperature and pressure integrated transmitter 15 includes a second test nipple 15-1 and a second temperature and pressure integrated transmitter body 15-3. The second test nipple 15-1 is connected to the oil outlet pipeline outside the oil outlet gate 9. The second temperature and pressure integrated transmitter body 15-3 is arranged at the other end of the second test nipple 15-1. The second test gate 15-2 is arranged on the second test nipple 15-1. The second temperature and pressure integrated transmitter body 15-3 is connected to a second patch temperature sensor 15-5 through a second data line 15-4. The second patch temperature sensor 15-5 is attached to the oil outlet pipeline. The oil outlet temperature and pressure integrated transmitter 15 displays and remotely transmits the outlet temperature and pressure of the oil well pipeline in real time.

[0115] The liquid level meter 21 includes an upper cock valve 21-1, a transparent tube 21-2, and a lower cock valve 21-3 connected in sequence. The liquid level meter 21 is installed on the side of the composite heat storage body 1. The upper cock valve 21-1 and the lower cock valve 21-3 are both connected to the inside of the composite heat storage body 1. The liquid level meter 21 is convenient for observing the liquid level during patrol inspections. Ensure that the liquid level data is reliable under the condition of failure of the temperature and liquid level integrated sensor 12 itself or communication failure, and avoid dry burning damage to the U-shaped fin electric heating tube group 19.

[0116] Among them, the heat storage liquid inlet temperature sensor 22 is set on the heat storage liquid delivery pipeline connected to the heat storage liquid inlet 4, and displays and transmits the temperature of the heat liquid inlet position after solar energy heating or wind energy heating in real time.

[0117] Among them, the heat storage liquid outlet temperature sensor 23 is arranged on the rear flexible pipe 11-2, which displays in real time and transmits remotely the temperature of the heat storage liquid when it leaves the composite heat storage.

[0118] Among them, the intelligent control box 6 is arranged on the side wall of the composite heat storage body 1, and the intelligent control box 6 is provided with a display screen 6-1, an intelligent control module 6-2, a data line group 6-7, and a communication module 6-9. The intelligent control module 6-2 is connected to the temperature and liquid level integrated sensor 12, the oil inlet temperature and pressure integrated transmitter 14, the oil outlet temperature and pressure integrated transmitter 15, and the heat storage liquid inlet temperature sensor 22 through the data line group 6-7. The intelligent control module 6-2 is connected to the network through the communication module 6-9. The intelligent control box 6 is also provided with power guarantee equipment, including a multifunctional air switch 6-3, a city power complementary controller 6-4, a relay group 6-5, a power line group 6-6, an electric meter 6-8, and a switch power supply 6-10. The intelligent control box 6 is used to display and remotely transmit the parameters such as the heat storage liquid inlet temperature, the heat storage liquid outlet temperature, the oil well pipeline inlet temperature, the oil well pipeline outlet temperature, the power, the time-sharing power consumption, etc. in real time and can be remotely set and managed.

[0119] Among them, the temperature and liquid level integrated sensor 12, the oil inlet temperature and pressure integrated transmitter 14, the oil outlet temperature and pressure integrated transmitter 15, the heat storage liquid inlet temperature sensor 22, the display screen 6-1, and the power guarantee equipment themselves are existing technologies and can be purchased from the market, and those skilled in the art are clear about this.

[0120] Among them, the intelligent control module 6-2 can be a programmable device such as a single-chip microcomputer, a PLC, an industrial computer, etc., which is clear to those skilled in the art.

[0121] Among them, the connection method of the multifunctional air switch 6-3, the AC complementary controller 6-4, the relay group 6-5, the power line group 6-6, the electric meter 6-8, the switching power supply 6-10 and the electric heating tube group 19 is consistent with that of conventional electric heating equipment, which is clear to those skilled in the art and will not be repeated here.

[0122] Embodiment 3:

[0123] Based on Example 2, this example provides a method for using a composite heat storage, comprising the following steps:

[0124] S1. Give priority to using green energy such as photovoltaic power generation or wind power to heat the thermal storage liquid and lipid phase change balls 5, and store heat to ensure continued use at night or during windless periods;

[0125] The heat storage liquid releases sensible heat, the lipid phase change ball 5 releases latent heat and sensible heat, and the oil well production fluid obtains heat through the heating coil 16 to ensure the oil well temperature rise.

[0126] When green energy is insufficient, it is supplemented by city electricity. When using city electricity, peak hours are avoided. Valley electricity is used to heat the heat storage liquid and lipid phase change balls 5 through the U-shaped fin electric heating tube group 19 to reduce electricity costs.

[0127] S2. When using green energy such as solar heat or wind heat heater, it is necessary to turn on the pump 11 to circulate the heat storage liquid to obtain heat. The heat storage liquid returns to the composite heat storage body 1 to heat the heating coil 16, the heat storage liquid and the lipid phase change ball 5, and continues to be used at night or during windless periods;

[0128] The heat storage liquid releases sensible heat, the lipid phase change ball 5 releases latent heat and sensible heat, and the oil well production fluid obtains heat through the heating coil 16 to ensure the oil well temperature rise.

[0129] When green energy is insufficient, it is supplemented by city electricity. When using city electricity, peak hours are avoided, and valley electricity is used to heat the heat storage liquid and lipid phase change balls 5 through the electric heating pipe group 19 to reduce electricity costs.

[0130] S3. When there is no green energy, use the mains electricity to avoid the peak period, and use the valley electricity to heat the heat storage liquid and the lipid phase change ball 5 through the electric heating tube group 19 to reduce the electricity cost.

[0131] S4, such as Figure 8 As shown, when electric heating is used, it is divided into five levels. Due to the different lengths of different heating tube groups 19, the rear electric heating tube group 19-1 and the front electric heating tube group 19-3 have the same power, and the power is greater than the middle electric heating tube group 19-2;

[0132] First-stage single start electric heating tube group 19-2;

[0133] Secondary single start rear electric heating tube group 19-1 or front electric heating tube group 19-3;

[0134] The third stage starts the rear electric heating tube group 19-1, the middle electric heating tube group 19-2, or starts or the front electric heating tube group 19-3, the middle electric heating tube group 19-2;

[0135] The fourth stage starts the rear electric heating tube group 19-1 and the front electric heating tube group 19-3;

[0136] Five-stage startup rear electric heating tube group 19-1, middle electric heating tube group 19-2, front electric heating tube group 19-3;

[0137] When the temperature is low, the heating scheme is upgraded step by step;

[0138] When the temperature is still low, the heating time is extended to the flat period;

[0139] If the temperature is too high, execute the reverse operation to shut down the electric heating pipe row in sequence.

[0140] When the mains electricity is used, the pump 11 does not need to be turned on, and the economic and social benefits are considerable.

[0141] All components and connection methods of components not discussed in this application belong to the known technologies in this technical field and can be directly applied without further explanation.

[0142] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0143] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0144] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0145] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A composite heat storage, comprising a composite heat storage body, wherein a heat storage liquid is arranged in the composite heat storage body, wherein the composite heat storage body is provided with an oil inlet pipeline, an oil outlet pipeline, a heat storage liquid outlet pipeline, and a heat storage liquid inlet, wherein a heating coil is arranged in the composite heat storage body, wherein two ports of the heating coil are respectively connected to the oil inlet pipeline and the oil outlet pipeline, wherein: At least one electric heating tube group is also provided; The electric heating tube group is installed from the upper end of the composite heat storage body, and extends into the gap of the heating coil.

2. A composite heat storage according to claim 1, characterized in that: The top of the composite heat storage body is provided with an electric heating port, each of which is provided with an electric heating tube group, the electric heating tube group includes at least two U-shaped fin electric heating tubes, and the electric heating port is provided with an electric heating rain cover.

3. A composite heat storage according to claim 2, characterized in that: The composite heat storage body contains heat storage liquid and lipid phase change balls with the same density as the heat storage liquid.

4. A composite heat storage according to claim 3, characterized in that: The lipid phase change ball comprises a high-density polyethylene shell, a high-density polyethylene plug is arranged on the high-density polyethylene shell, and the high-density polyethylene shell is filled with lipid phase change material and stainless steel powder; The density of lipid phase change material is less than that of thermal storage liquid and less than that of stainless steel powder.

5. A composite heat storage according to claim 3, characterized in that: The heating coil is made of stainless steel pipe, and annular fins are distributed on the surface of the coil; The gap between adjacent fins in the heating coil is less than half of the diameter of the lipid phase change ball, and the gap between the outer diameters of the fins in the heating coil is greater than the diameter of the lipid phase change ball; The coils in the heating coil are formed into at least two layers by U-shaped elbows; A heating coil support frame is arranged inside the composite heat storage body and is inserted under each layer of the heating coil.

6. A composite heat storage according to claim 2, characterized in that: The oil inlet pipeline, the oil outlet pipeline, and the heat storage liquid outlet pipeline are arranged on the left wall of the composite heat storage body, and the heat storage liquid outlet pipeline is located at the lower end of the left wall of the composite heat storage body; The heat storage liquid inlet is connected to the top of the composite heat storage body through the third short section; The oil inlet pipeline is provided with an oil inlet gate; The oil outlet pipeline is provided with an oil outlet gate; The thermal storage liquid outlet pipe is provided with a thermal storage liquid outlet gate; The oil inlet pipeline and the oil outlet pipeline are connected through a bypass pipeline outside the oil inlet gate and the oil outlet gate, and a bypass gate is arranged on the bypass pipeline; A first filter is arranged in the heat storage liquid outlet pipe inside the composite heat storage body.

7. A composite heat storage according to claim 6, characterized in that: The thermal storage liquid outlet gate is connected to the pump; The front flexible pipe of the pump is connected to the heat storage liquid outlet gate, and the rear flexible pipe of the pump is used to connect to the heat storage liquid inlet of the green energy heating device.

8. A composite heat storage according to claim 7, characterized in that: A manhole is formed on the top of the composite heat storage body, and a manhole cover is provided on the manhole; The composite heat storage body is also provided with an overflow pipe gate and a vent pipe gate; The overflow pipe gate is a threaded ball valve, which is connected to the upper left wall of the composite heat storage body through the first short section, and the overflow pipe gate is in a normally open state; The vent pipe gate is a threaded ball valve, which is connected to the bottom of the composite heat storage body through the second short section, and the vent pipe gate is in a normally closed state; A second filter is arranged in the second short section inside the composite heat storage body.

9. A composite heat storage according to claim 8, characterized in that: A partition net group is arranged inside the main body of the composite heat storage, including a front partition net and a rear partition net, which are respectively located at the front side and the rear side of the heating coil; The left and right sides and bottom edges of the front and rear partition nets are fixed to the inner wall of the composite heat storage body by bolts, the middle is connected to the side edge of the heating coil by a threaded clip, and the top edge is flush with the center line of the overflow pipe gate.

10. A composite heat storage according to claim 9, characterized in that: The electric heating port is a rectangular hole. Three electric heating ports are provided and are distributed in parallel and equidistantly, and are divided into a front electric heating port, a middle electric heating port, and a rear electric heating port; The front electric heating port is provided with a front electric heating tube group, the middle electric heating port is provided with a middle electric heating tube group, and the rear electric heating port is provided with a rear electric heating tube group; The front electric heating port is provided with a front electric heating rain cover, the middle electric heating port is provided with a middle electric heating rain cover, and the rear electric heating port is provided with a rear electric heating rain cover; The electric heating port and the manhole are arranged in the middle of the top of the composite heat storage body, the manhole is on the right side of the electric heating port, and the manhole cover does not interfere with the electric heating rain cover; The front electric heating port and the rear electric heating port are of equal length; A ladder is arranged on the right wall of the composite heat storage body.

11. A composite heat storage according to claim 10, characterized in that: The first filter screen and the second filter screen are both made of stainless steel wire and are in a stepped cylindrical shape; The electrically heated rain shield is made of a lightweight insulating material; The separation net group is made of stainless steel wire; The manhole cover is circular, hollow and heat-insulating, and is made of stainless steel both inside and outside; The ladder is made of steel sections.

12. A composite heat storage according to claim 8, characterized in that: A data detection and control system is also provided, which includes a temperature and liquid level integrated sensor, an oil inlet temperature and pressure integrated transmitter, an oil outlet temperature and pressure integrated transmitter, a liquid level meter, a heat storage liquid inlet temperature sensor, and an intelligent control box; The temperature and liquid level integrated sensor is mounted on the manhole cover; The oil inlet temperature and pressure integrated transmitter is arranged on the oil inlet pipeline outside the oil inlet gate; The oil outlet temperature and pressure integrated transmitter is arranged on the oil outlet pipeline outside the oil outlet gate; The liquid level meter includes an upper cock valve, a transparent tube, and a lower cock valve connected in sequence. The liquid level meter is installed on the side of the composite heat storage body. The upper cock valve and the lower cock valve are both connected to the inside of the composite heat storage body. The heat storage liquid inlet temperature sensor is arranged on the heat storage liquid delivery pipeline connected to the heat storage liquid inlet; The thermal storage liquid outlet temperature sensor is arranged on the rear flexible pipe; The intelligent control box is arranged on the side wall of the composite heat storage body, and the intelligent control box is provided with a display screen, an intelligent control module, a data line group, and a communication module; The intelligent control module is connected to the temperature and liquid level integrated sensor, the oil inlet temperature and pressure integrated transmitter, the oil outlet temperature and pressure integrated transmitter, and the thermal storage liquid inlet temperature sensor through a data line group, and the intelligent control module is connected to the network through a communication module; The intelligent control box is also provided with power guarantee equipment, including a multifunctional air switch, a mains complementary controller, a relay group, a power line group, an electric meter, and a switching power supply, which are used to supply power to the electric heating tube group.

13. A composite heat storage according to any one of claims 1 to 12, characterized in that: The main body of the composite heat storage is a box structure with a square end face; The composite heat storage body comprises an outer stainless steel shell and an inner stainless steel shell, a fire-resistant insulation board is arranged between the outer stainless steel shell and the inner stainless steel shell, and a stainless steel tie rod group is arranged in the inner stainless steel shell.

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