Solar heat storage and heating integrated system and use method

Abstract

The invention relates to the technical field of oil field thermal recovery system heating, in particular to a solar heat storage and heating integrated system and a using method, the solar heat storage and heating integrated system comprises a heat storage device and a heat source device capable of providing heat for the heat storage device, and the heat storage device comprises a main heater, an auxiliary heater, a circulating pump, a heat exchanger, a first three-way valve, a second three-way valve and a phase change heat storage tank. The crude oil heating device is reasonable and compact in structure and convenient to use, the heat source device, the main heater and the auxiliary heater can be used in a coordinated mode, the heating requirements of crude oil in various environments are met, when heat provided by the heat source device is small, the main heater or / and the auxiliary heater can be started, and therefore the crude oil is heated in time through the heat exchanger; when the heat source device works normally, the phase change heat storage tank can firstly store heat energy of the heat source device and then release and raise the temperature of circulating water in the circulating pump when heat provided by the heat source device is small, so that the energy utilization rate can be improved, and meanwhile, the heating cost and the maintenance cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of heating of oil field thermal recovery systems, and relates to a solar energy heat storage and heating integrated system and a use method thereof. Background Art

[0002] Gas heating furnaces are the main production equipment for heating crude oil produced at the wellhead in oilfield production. Due to the complex composition of gas, the combustion performance of gas furnaces at well sites is poor, and they cannot meet the emission standards required by environmental protection, polluting the surrounding air. In addition, gas furnaces at well sites have major safety hazards. Electric heating technology has been adopted at some oil well sites, and local emission reduction targets can be achieved, but the energy consumption is large, making it difficult to achieve the long-term energy-saving goals of sustainable development of oilfield enterprises, and the electricity cost is high.

[0003] An oil field refers to the sum of oil and gas reservoirs within the same oil and gas production area under the control of a single geological structure (or formation). An oil and gas field may have one or more oil and gas reservoirs. The area with mainly oil reservoirs is called an oil field, and the area with mainly gas reservoirs is called a gas field. According to the geological factors controlling the oil and gas production area, oil and gas fields are divided into three categories: structural oil and gas fields, which refer to oil and gas production areas controlled by a single structural factor, such as folds and faults; stratigraphic oil and gas fields, which refer to oil-bearing areas controlled by stratigraphic factors (such as unconformity, pinch-out and lithologic changes in the formation) on the background of regional anticlines or monoclinal structures; composite oil and gas fields, which refer to oil and gas production areas that are not controlled by a single structural or stratigraphic factor, but by multiple geological factors. Energy saving in heating systems is essentially to efficiently obtain more solar energy and minimize the consumption of electricity in oil fields. Under the premise of ensuring production safety and normal operation, the energy saving situation of the system can be known by evaluating the power consumption. Increasing the investment in solar collectors and energy storage and heat storage systems can achieve the goal of saving electricity and energy. However, this will cause the system cost to rise sharply. How to comprehensively consider efficiency and cost and obtain the optimal solution is one of the most critical issues that need to be solved urgently. Summary of the invention

[0004] The present invention provides a solar energy heat storage and heating integrated system and a method of use, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of high energy-saving costs and major safety hazards in the existing thermal energy collection system heating.

[0005] One of the technical solutions of the present invention is achieved through the following measures: a solar thermal storage and heating integrated system, comprising a heat storage device and a heat source device capable of providing heat to the heat storage device, the heat storage device comprising a main heater, a sub-heater, a circulating pump, a heat exchanger, a first three-way valve, a second three-way valve and a phase-change heat storage tank, a first pipeline is fixedly connected between the outlet of the heat source device and the inlet of the main heater, a second pipeline is fixedly connected between the outlet of the main heater and the inlet of the phase-change heat storage tank, a third pipeline is fixedly connected between the outlet of the phase-change heat storage tank and the inlet of the sub-heater, and a third pipeline is fixedly connected between the outlet of the sub-heater and the first end of the first three-way valve. The fourth pipeline, the fifth pipeline is fixedly connected between the second end of the first three-way valve and the primary side inlet of the heat exchanger, the sixth pipeline is fixedly connected between the primary side outlet of the heat exchanger and the inlet of the circulation pump, the seventh pipeline is fixedly connected between the third end of the first three-way valve and the sixth pipeline, the eighth pipeline is fixedly connected between the outlet of the circulation pump and the first end of the second three-way valve, the ninth pipeline is fixedly connected between the second end of the second three-way valve and the inlet of the heat source device, the tenth pipeline is fixedly connected between the third end of the second three-way valve and the first pipeline, the secondary side inlet of the heat exchanger is fixedly connected to the oil inlet pipeline, and the secondary side outlet of the heat exchanger is fixedly connected to the oil outlet pipeline.

[0006] The following are further optimizations and / or improvements to the above technical solutions: The heat storage device may further include a liquid storage tank, a sixth pipeline is fixedly connected between the primary side outlet of the heat exchanger and the inlet of the liquid storage tank, and an eleventh pipeline is fixedly connected between the outlet of the liquid storage tank and the inlet of the circulation pump.

[0007] The above-mentioned heat storage device may also include a skid seat and a protective shell fixedly installed on the upper side of the skid seat, an installation room is formed between the inner side of the protective shell and the upper side of the skid seat, the phase change heat storage tank is fixedly installed on the left part of the installation room, the liquid storage tank is fixedly installed on the right part of the installation room, the main heater, the auxiliary heater and the heat exchanger are fixedly installed in the middle of the installation room at intervals from bottom to top, a first inspection door is provided on the front side of the right part of the protective shell corresponding to the position of the heat exchanger, and a second inspection door is provided on the right side of the rear part of the protective shell corresponding to the position of the liquid storage tank.

[0008] The above-mentioned heat storage device may also include a front-end control module and a data acquisition module. An oil inlet temperature sensor is installed on the oil inlet pipeline, an oil outlet temperature sensor is installed on the oil outlet pipeline, a first temperature sensor is installed on the phase change heat storage tank, a second temperature sensor is installed on the second pipeline, a third temperature sensor is installed on the fourth pipeline, and a pressure sensor is installed on the eighth pipeline. The first three-way valve and the second three-way valve are both electric three-way valves. The oil inlet temperature sensor, the oil outlet temperature sensor, the first temperature sensor, the second temperature sensor, the third temperature sensor and the pressure sensor are all connected to the data acquisition module, the data acquisition module is connected to the front-end control module, and the front-end control module is respectively connected to the first three-way valve, the second three-way valve, the main heater, the auxiliary heater, the circulating pump and the heat source device.

[0009] The above may also include a remote control module, which is connected to the front-end control module.

[0010] The heat source device may be a solar heat pump.

[0011] The second technical solution of the present invention is achieved by the following measures: A method for using a solar thermal storage and heating integrated system comprises the following steps: Step 1: Fixedly connect the oil inlet pipeline with the oil outlet of the wellhead, and fixedly connect the oil outlet pipeline with the delivery pipeline of the wellhead; Step 2: When the heat source device is working, the front-end control module activates the second three-way valve to connect the eighth pipeline and the ninth pipeline, and stops the main heater and the auxiliary heater. If the temperature data collected by the third temperature sensor is less than or equal to the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the fifth pipeline. If the temperature data collected by the third temperature sensor is greater than the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the seventh pipeline; When the heat source device stops working, the front-end control module activates the second three-way valve to connect the eighth pipeline and the tenth pipeline. If the temperature data collected by the second temperature sensor is greater than or equal to the set value, the main heater and the auxiliary heater both stop working; if the temperature data collected by the second temperature sensor is less than the set value, the main heater and / or the auxiliary heater start working; If the temperature data collected by the third temperature sensor is less than or equal to the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the fifth pipeline; If the temperature data collected by the third temperature sensor is greater than the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the seventh pipeline.

[0012] The present invention has a reasonable and compact structure and is easy to use. The heat source device, the main heater and the auxiliary heater can be used in a coordinated manner to meet the heating needs of crude oil under various environments. When the heat provided by the heat source device is relatively small, the main heater and / or the auxiliary heater can be started, so that the crude oil can be heated in time through the heat exchanger. When the heat source device works normally, the phase change heat storage tank can first store the heat energy of the heat source device, and then release it when the heat provided by the heat source device is relatively small, thereby increasing the temperature of the circulating water in the circulating pump, thereby improving energy utilization, reducing heating costs, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a schematic diagram of the process flow of Example 1.

[0014] Attached Figure 2 It is a schematic diagram of the three-dimensional structure of the heat storage device in Example 3.

[0015] Attached Figure 3 This is a schematic diagram of the main structure of the heat storage device in Example 3 after the shell is removed.

[0016] Attached Figure 4 This is a schematic diagram of the rear view structure of the heat storage device in Example 3 after the shell is removed.

[0017] Attached Figure 5 This is a schematic diagram of the left side structure of the heat storage device in Example 3 after the shell is removed.

[0018] Attached Figure 6 It is a schematic diagram of the three-dimensional structure of the heat storage device in Example 3 after the shell is removed.

[0019] Attached Figure 7 This is a circuit block diagram of Embodiment 4.

[0020] The codes in the accompanying drawings are: 1 is a heat source device, 2 is a main heater, 3 is an auxiliary heater, 4 is a circulating pump, 5 is a heat exchanger, 6 is a first three-way valve, 7 is a second three-way valve, 8 is a phase change heat storage tank, 9 is a first pipeline, 10 is a second pipeline, 11 is a third pipeline, 12 is a fourth pipeline, 13 is a fifth pipeline, 14 is a sixth pipeline, 15 is a seventh pipeline, 16 is an eighth pipeline, 17 is a ninth pipeline, 18 is a tenth pipeline, 19 is an oil inlet pipeline, 20 is an oil outlet pipeline, 21 is a liquid storage tank, 22 is an eleventh pipeline, 23 is a skid seat, 24 is a protective shell, 25 is a first inspection door, 26 is a second inspection door, 27 is an oil inlet temperature sensor, 28 is an oil outlet temperature sensor, 29 is a first temperature sensor, 30 is a second temperature sensor, 31 is a third temperature sensor, and 32 is a pressure sensor. DETAILED DESCRIPTION

[0021] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0022] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0023] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1 As shown, the solar thermal storage and heating integrated system includes a heat storage device and a heat source device 1 capable of providing heat to the heat storage device, the heat storage device includes a main heater 2, a sub-heater 3, a circulating pump 4, a heat exchanger 5, a first three-way valve 6, a second three-way valve 7 and a phase-change heat storage tank 8, a first pipeline 9 is fixedly connected between the outlet of the heat source device 1 and the inlet of the main heater 2, a second pipeline 10 is fixedly connected between the outlet of the main heater 2 and the inlet of the phase-change heat storage tank 8, a third pipeline 11 is fixedly connected between the outlet of the phase-change heat storage tank 8 and the inlet of the sub-heater 3, a fourth pipeline 12 is fixedly connected between the outlet of the sub-heater 3 and the first end of the first three-way valve 6, and the second end of the first three-way valve 6 is fixedly connected to the first end of the phase-change heat storage tank 8. A fifth pipeline 13 is fixedly connected between the primary side inlet of the heat exchanger 5, a sixth pipeline 14 is fixedly connected between the primary side outlet of the heat exchanger 5 and the inlet of the circulation pump 4, a seventh pipeline 15 is fixedly connected between the third end of the first three-way valve 6 and the sixth pipeline 14, an eighth pipeline 16 is fixedly connected between the outlet of the circulation pump 4 and the first end of the second three-way valve 7, a ninth pipeline 17 is fixedly connected between the second end of the second three-way valve 7 and the inlet of the heat source device 1, a tenth pipeline 18 is fixedly connected between the third end of the second three-way valve 7 and the first pipeline 9, an oil inlet pipeline 19 is fixedly connected to the secondary side inlet of the heat exchanger 5, and an oil outlet pipeline 20 is fixedly connected to the secondary side outlet of the heat exchanger 5.

[0024] According to the requirements, the main heater 2 and the auxiliary heater 3 are both existing well-known technologies. The main heater 2 and the auxiliary heater 3 are both composed of at least two pipeline electric heaters connected in parallel. The heat exchanger 5 is an existing well-known technology, such as a tubular heat exchanger. The phase change heat storage tank 8 is an existing well-known technology, such as a phase change material heat storage type crude oil heating device recorded in the patent document with announcement number CN214620100U, or a phase change heat storage tank whose phase change material is an inorganic eutectic salt. A first inspection valve is installed at the outlet of the circulating pump 4, a first switch valve is installed on the second pipeline 10, a first connecting pipe is fixedly connected to the first pipeline 9 corresponding to the position between the tenth pipeline 18 and the main heater 2, a second connecting pipe is fixedly connected between the first connecting pipe and the third pipeline 11, a second switch valve is installed on the first connecting pipe corresponding to the position between the second connecting pipe and the first pipeline, a third switch valve is installed on the second connecting pipe, and a fourth switch valve is installed on the third pipeline 11 corresponding to the position between the phase change heat storage tank 8 and the second connecting pipe. During use, through such an arrangement, the heat source device 1, the main heater 2 and the auxiliary heater 3 can be used in a coordinated manner to meet the heating needs of crude oil or drilling fluid in various environments. When the heat provided by the heat source device 1 is small, the main heater 2 and / or the auxiliary heater 3 can be started, so that the crude oil or drilling fluid can be heated in time through the heat exchanger 5. When the heat source device 1 works normally, the phase change heat storage tank 8 can first store the heat energy of the heat source device 1, and then release it when the heat provided by the heat source device 1 is small, thereby increasing the temperature of the circulating water in the circulating pump 4. This can improve energy utilization, and at the same time reduce heating costs and maintenance costs. The present invention has a reasonable and compact structure, is easy to use, and has the characteristics of safety, labor saving, simplicity and high efficiency.

[0025] The above solar thermal storage and heating integrated system can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the heat storage device also includes a liquid storage tank 21, the sixth pipeline 14 is fixedly connected between the primary side outlet of the heat exchanger 5 and the inlet of the liquid storage tank 21, and the eleventh pipeline 22 is fixedly connected between the outlet of the liquid storage tank 21 and the inlet of the circulation pump 4.

[0026] According to the requirements, the lower end of the liquid storage tank 21 is fixedly connected with a sewage pipe, on which a sewage valve is installed, the upper part of the liquid storage tank 21 is fixedly connected with a water supply pipe, on which a water supply valve is installed, and a filter and a second inspection valve are sequentially installed along the medium flow direction on the eleventh pipeline 22. During use, such an arrangement can stabilize the pressure in the heat storage device and facilitate water supply to the heat storage device to prevent the loss during operation from affecting the heat storage device.

[0027] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figures 1 to 6As shown, the heat storage device also includes a skid 23 and a protective shell 24 fixedly installed on the upper side of the skid 23, an installation room is formed between the inner side of the protective shell 24 and the upper side of the skid 23, the phase change heat storage tank 8 is fixedly installed on the left part of the installation room, the liquid storage tank 21 is fixedly installed on the right part of the installation room, the main heater 2, the auxiliary heater 3 and the heat exchanger 5 are fixedly installed in the middle part of the installation room from bottom to top, a first inspection door 25 is provided on the front side of the right part of the protective shell 24 corresponding to the position of the heat exchanger 5, and a second inspection door 26 is provided on the right side of the rear part of the protective shell 24 corresponding to the position of the liquid storage tank 21.

[0028] During use, such an arrangement can protect the main heater 2, the auxiliary heater 3, the liquid storage tank 21 and the phase change heat storage tank 8. The arrangement of the first inspection door 25 and the second inspection door 26 facilitates the maintenance of the heat storage device, and integrates the main heater 2, the auxiliary heater 3, the liquid storage tank 21 and the phase change heat storage tank 8 into one, with a compact design, small footprint, and easy installation, transportation and transfer.

[0029] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figures 2 to 7 As shown, the heat storage device also includes a front-end control module and a data acquisition module. An oil inlet temperature sensor 27 is installed on the oil inlet pipeline 19, an oil outlet temperature sensor 28 is installed on the oil outlet pipeline 20, a first temperature sensor 29 is installed on the phase change heat storage tank 8, a second temperature sensor 30 is installed on the second pipeline 10, a third temperature sensor 31 is installed on the fourth pipeline 12, and a pressure sensor 32 is installed on the eighth pipeline 16. The first three-way valve 6 and the second three-way valve 7 are both electric three-way valves. The oil inlet temperature sensor 27, the oil outlet temperature sensor 28, the first temperature sensor 29, the second temperature sensor 30, the third temperature sensor 31 and the pressure sensor 32 are all connected to the data acquisition module, and the data acquisition module is connected to the front-end control module, and the front-end control module is respectively connected to the first three-way valve 6, the second three-way valve 7, the main heater 2, the auxiliary heater 3, the circulating pump 4 and the heat source device 1.

[0030] According to the requirements, gate valves are provided on the oil inlet pipeline 19 and the oil outlet pipeline 20, and the oil inlet temperature sensor 27 and the oil outlet temperature sensor 28 are installed between the gate valve and the heat exchanger 5. The oil inlet pipeline 19 and the oil outlet pipeline 20 are respectively fixedly connected with a drain pipe arranged between the gate valve and the temperature sensor, and a drain valve is installed on the drain pipe. The oil inlet temperature sensor 27, the oil outlet temperature sensor 28, the first temperature sensor 29, the second temperature sensor 30, the third temperature sensor 31 and the pressure sensor 32 are all existing well-known technologies. The data acquisition module and the front-end control module are existing well-known technologies, such as the temperature and pressure data acquisition module and the Siemens smart 200 PLC controller installed in the control box on the upper right side of the protective shell 24. During use, through such a setting, the heating temperature of the heat storage device can be set according to the specifications of the heat source device 1 to meet the temperature requirement of the medium at the secondary side outlet of the heat exchanger 5. The operating condition of the circulating pump 4 can also be controlled according to the pressure, so that the water pressure in the heat storage device is more stable, and the circulating water temperature in the heat storage device can be avoided to be too high or too low, thereby reducing energy consumption.

[0031] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 7 As shown, it also includes a remote control module, which is connected to the front-end control module.

[0032] The remote control module is a known technology. The remote control module includes a visualization system platform and a login terminal connected to the visualization system platform. The visualization system platform is connected to the front-end control module by wired communication and / or wireless communication. The login terminal is a known computer, mobile phone or tablet computer, so as to understand the operating status of the heat storage device in real time. The remote control module is convenient for storing and processing the operating data of the heat storage device, and can send out an alarm signal according to the situation to remind the operator to perform maintenance as soon as possible, or trigger a fault emergency handling mechanism, such as disconnecting the power supply of the heat storage device and the heat source device 1 to avoid accidents.

[0033] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, the heat source device 1 is a solar heat pump. According to the demand, the heat source device 1 can work by using solar heat or grid off-peak electricity. During use, such a setting can reduce energy consumption and can also be applied to heating needs in various environments.

[0034] Embodiment 7: As an optimization of the above embodiment, as shown in the attached Figures 1 to 7 As shown, the method for using the solar thermal storage and heating integrated system comprises the following steps: Step 1: The oil inlet pipeline 19 is fixedly connected to the oil outlet of the wellhead, and the oil outlet pipeline 20 is fixedly connected to the delivery pipeline of the wellhead; Step 2: When the heat source device 1 is working, the front-end control module activates the second three-way valve 7 to connect the eighth pipeline 16 and the ninth pipeline 17, and stops the main heater 2 and the auxiliary heater 3. If the temperature data collected by the third temperature sensor 31 is less than or equal to the set value, the front-end control module activates the first three-way valve 6 to connect the fourth pipeline 12 and the fifth pipeline 13; If the temperature data collected by the third temperature sensor 31 is greater than the set value, the front-end control module activates the first three-way valve 6 to connect the fourth pipeline 12 and the seventh pipeline 15; When the heat source device 1 stops working, the front-end control module activates the second three-way valve 7 to connect the eighth pipeline 16 and the tenth pipeline 18. If the temperature data collected by the second temperature sensor 30 is greater than or equal to the set value, the main heater 2 and the auxiliary heater 3 both stop working; if the temperature data collected by the second temperature sensor 30 is less than the set value, the main heater 2 and / or the auxiliary heater 3 start working; If the temperature data collected by the third temperature sensor 31 is less than or equal to the set value, the front-end control module operates the first three-way valve 6 to connect the fourth pipeline 12 and the fifth pipeline 13; if the temperature data collected by the third temperature sensor 31 is greater than the set value, the front-end control module operates the first three-way valve 6 to connect the fourth pipeline 12 and the seventh pipeline 15.

[0035] Multiple heat source devices 1 are installed according to the site space. The heat source device 1 is a solar collector placed in a single row or multiple rows. When the solar collector is working, the hot water generated flows into the phase change heat storage tank 8 and the primary side of the heat exchanger 5; When the solar energy is sufficient during the day, the solar collector starts to work and absorbs heat. The hot water generated by the work flows out from the solar collector, passes through the main heater 2, and flows into the phase change heat storage tank 8. The phase change heat storage material in the phase change heat storage tank 8 absorbs and stores the heat. Then the hot water flows out and flows into the primary side of the heat exchanger 5 after passing through the auxiliary heater 3. The hot water on the primary side of the heat exchanger 5 can heat the crude oil on the secondary side of the heat exchanger 5. The water after heat exchange on the primary side of the heat exchanger 5 flows back to the solar collector. The solar collector continues to heat the circulating water, so that the crude oil on the secondary side of the heat exchanger 5 can be continuously heated. When the crude oil temperature data on the secondary side of the heat exchanger 5 is greater than the set value, the front-end control module causes the first three-way valve 6 to operate and connect the fourth pipeline 12 and the seventh pipeline 15, so that hot water no longer flows into the primary side of the heat exchanger 5, so that the crude oil temperature can be reduced to the set value.

[0036] When the solar energy is weak during the day or at night (the heat of the heat source device 1 is less than the set value), the solar collector stops working, and the front-end control module activates the second three-way valve 7 to connect the eighth pipeline 16 and the tenth pipeline 18. The phase change heat storage tank 8 starts working first, releasing the heat stored in the phase change heat storage material, and can heat the circulating water flowing through the phase change heat storage tank 8. The main heater 2 and the auxiliary heater stop working, and the circulating water heated by the phase change heat storage tank 8 flows out through the auxiliary heater 3 and then flows into the primary side of the heat exchanger 5. The circulating water on the primary side of the heat exchanger 5 can be The crude oil on the secondary side of the heat exchanger 5 is heated, and the circulating water after heat exchange on the primary side of the heat exchanger 5 flows back to the phase change heat storage tank 8. The phase change heat storage material of the phase change heat storage tank 8 continuously releases energy to heat the circulating water, so that the crude oil on the secondary side of the heat exchanger 5 can be continuously heated. When the crude oil temperature data on the secondary side of the heat exchanger 5 is greater than the set value, the front-end control module activates the first three-way valve 6 to connect the fourth pipeline 12 and the seventh pipeline 15, so that the circulating water no longer flows into the primary side of the heat exchanger 5, so that the crude oil temperature can be reduced to the set value.

[0037] If the temperature data collected by the third temperature sensor 31 is less than the set value, that is, after the energy of the phase change heat storage material of the phase change heat storage tank 8 is released, the circulating water is no longer heated, and the main heater 2 and the auxiliary heater 3 start to work, and the hot water generated by the work flows into the primary side of the heat exchanger 5. The circulating water after heat exchange on the primary side of the heat exchanger 5 flows back to the phase change heat storage tank 8. The phase change heat storage material of the phase change heat storage tank 8 first absorbs and stores heat, and then the hot water flows out and flows into the primary side of the heat exchanger 5 after passing through the auxiliary heater 3. The circulating water on the primary side of the heat exchanger 5 can heat the crude oil on the secondary side of the heat exchanger 5. When the crude oil temperature data on the secondary side of the heat exchanger 5 is greater than the set value, the front-end control module causes the first three-way valve 6 to operate and connect the fourth pipeline 12 and the seventh pipeline 15, so that hot water no longer flows into the primary side of the heat exchanger 5, thereby reducing the crude oil temperature to the set value.

[0038] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A solar thermal storage and heating integrated system, characterized in that The invention comprises a heat storage device and a heat source device capable of providing heat to the heat storage device, wherein the heat storage device comprises a main heater, a sub-heater, a circulating pump, a heat exchanger, a first three-way valve, a second three-way valve and a phase-change heat storage tank, a first pipeline is fixedly connected between the outlet of the heat source device and the inlet of the main heater, a second pipeline is fixedly connected between the outlet of the main heater and the inlet of the phase-change heat storage tank, a third pipeline is fixedly connected between the outlet of the phase-change heat storage tank and the inlet of the sub-heater, a fourth pipeline is fixedly connected between the outlet of the sub-heater and the first end of the first three-way valve, a second end of the first three-way valve and the heat exchanger are connected to each other, and a fourth pipeline is fixedly connected between the outlet of the sub-heater and the first end of the first three-way valve. A fifth pipeline is fixedly connected between the primary side inlets, a sixth pipeline is fixedly connected between the primary side outlet of the heat exchanger and the inlet of the circulation pump, a seventh pipeline is fixedly connected between the third end of the first three-way valve and the sixth pipeline, an eighth pipeline is fixedly connected between the outlet of the circulation pump and the first end of the second three-way valve, a ninth pipeline is fixedly connected between the second end of the second three-way valve and the inlet of the heat source device, a tenth pipeline is fixedly connected between the third end of the second three-way valve and the first pipeline, an oil inlet pipeline is fixedly connected to the secondary side inlet of the heat exchanger, and an oil outlet pipeline is fixedly connected to the secondary side outlet of the heat exchanger.

2. The solar thermal storage and heating integrated system according to claim 1 is characterized in that The heat storage device also includes a liquid storage tank. The sixth pipeline is fixedly connected between the primary side outlet of the heat exchanger and the inlet of the liquid storage tank. The outlet of the liquid storage tank and the inlet of the circulation pump are fixedly connected with an eleventh pipeline.

3. The solar thermal storage and heating integrated system according to claim 2 is characterized in that The heat storage device also includes a skid and a protective shell fixedly installed on the upper side of the skid, an installation room is formed between the inner side of the protective shell and the upper side of the skid, the phase change heat storage tank is fixedly installed on the left side of the installation room, the liquid storage tank is fixedly installed on the right side of the installation room, the main heater, the auxiliary heater and the heat exchanger are fixedly installed in the middle of the installation room from bottom to top, a first inspection door is provided on the front side of the right part of the protective shell corresponding to the position of the heat exchanger, and a second inspection door is provided on the right side of the rear part of the protective shell corresponding to the position of the liquid storage tank.

4. The solar thermal storage and heating integrated system according to claim 1, 2 or 3, characterized in that The heat storage device also includes a front-end control module and a data acquisition module. An oil inlet temperature sensor is installed on the oil inlet pipeline, an oil outlet temperature sensor is installed on the oil outlet pipeline, a first temperature sensor is installed on the phase change heat storage tank, a second temperature sensor is installed on the second pipeline, a third temperature sensor is installed on the fourth pipeline, and a pressure sensor is installed on the eighth pipeline. The first three-way valve and the second three-way valve are both electric three-way valves. The oil inlet temperature sensor, the oil outlet temperature sensor, the first temperature sensor, the second temperature sensor, the third temperature sensor and the pressure sensor are all connected to the data acquisition module, the data acquisition module is connected to the front-end control module, and the front-end control module is respectively connected to the first three-way valve, the second three-way valve, the main heater, the auxiliary heater, the circulating pump and the heat source device.

5. The solar thermal storage and heating integrated system according to claim 4 is characterized in that It also includes a remote control module, which is connected to the front-end control module.

6. The solar thermal storage and heating integrated system according to claim 1 or 2 or 3 or 5, characterized in that The heat source device is a solar heat pump.

7. The solar thermal storage and heating integrated system according to claim 4 is characterized in that The heat source device is a solar heat pump.

8. A method for using the solar thermal storage and heating integrated system as claimed in any one of claims 1 to 7, characterized in that The following steps are involved: Step 1: Fixedly connect the oil inlet pipeline with the oil outlet of the wellhead, and fixedly connect the oil outlet pipeline with the delivery pipeline of the wellhead; Step 2: When the heat source device is working, the front-end control module activates the second three-way valve to connect the eighth pipeline and the ninth pipeline, and stops the main heater and the auxiliary heater. If the temperature data collected by the third temperature sensor is less than or equal to the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the fifth pipeline. If the temperature data collected by the third temperature sensor is greater than the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the seventh pipeline; When the heat source device stops working, the front-end control module activates the second three-way valve to connect the eighth pipeline and the tenth pipeline. If the temperature data collected by the second temperature sensor is greater than or equal to the set value, the main heater and the auxiliary heater both stop working; if the temperature data collected by the second temperature sensor is less than the set value, the main heater and / or the auxiliary heater start working; If the temperature data collected by the third temperature sensor is less than or equal to the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the fifth pipeline; If the temperature data collected by the third temperature sensor is greater than the set value, the front-end control module activates the first three-way valve to connect the fourth pipeline and the seventh pipeline.

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