Single-medium multiphase heat storage tank

Abstract

The utility model belongs to the technical field of energy storage, and particularly relates to a single-medium multiphase heat storage tank. A single-medium multiphase heat storage tank comprises a heat storage tank shell, a heat storage tank top cover is arranged at the top of the heat storage tank shell, a water outlet connecting hole and a water inlet connecting hole are formed in the heat storage tank top cover, connecting pipelines are arranged at the water outlet connecting hole and the water inlet connecting hole respectively, and a pipeline supporting frame is arranged in the heat storage tank shell. A water flow multi-phase pipeline is supported on the pipeline supporting frame, the two ends of the water flow multi-phase pipeline communicate with the water outlet connecting hole and the water inlet connecting hole correspondingly, a heat storage box heat preservation layer is arranged on the inner wall of the heat storage box shell, and the space between the heat storage box heat preservation layer and the outer wall of the water flow multi-phase pipeline is filled with inorganic phase change materials. The inorganic phase change material is filled around the water flow multi-phase pipeline, heat storage is achieved through solid-liquid conversion of phase change, solar energy and off-peak electricity can be efficiently utilized to heat a crude oil gathering and transportation system, and oil field fuel gas and electric energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and particularly relates to a single-medium multi-phase heat storage box. Background Art

[0002] Gas heating furnaces are the main energy-consuming and waste gas emission equipment in the process of oil and gas gathering and transportation. At present, there are tens of thousands of different types of heating furnaces built in major oil fields in China, and the energy consumption and carbon emissions are very alarming. With the increasingly stringent requirements for energy and environmental protection around the world, and China's goal of achieving "dual carbon", major oil fields use electric heating furnaces, air source heat pumps, solar thermal and other multi-energy coupling heating methods to replace gas heating furnaces. If the peak-valley power difference is not considered, the electric heating furnace and air source heat pump are directly used to achieve system heating, then the system consumes a lot of electricity and has poor economy; the solar energy collection daylight time is limited, and it is impossible to collect heat during non-lighting time, so it is impossible to ensure 24-hour continuous low-cost heating of crude oil. Multiphase thermal storage tank is a device that uses inorganic phase change materials to store and release heat for water. It can store the energy converted or transmitted by various energy sources such as electricity and heat in the form of heat energy, and release it when needed to meet the energy needs of different fields. For example, in the oil field life field, the multiphase thermal storage tank can be used to store solar thermal energy for heating and hot water use; in the oil field production field, it can be used to store high-temperature thermal energy to support heating and steam generation in the production process. Therefore, the multiphase thermal storage tank has a wide range of application prospects and plays an important role in achieving sustainable energy development.

[0003] The existing composite heat storage structure (authorization announcement number: CN220250123U) generally has the following problems during use:

[0004] 1. The electric heating structure has high energy consumption. First, in terms of energy waste, high energy consumption means that the heat storage tank needs to consume more electricity when storing and releasing heat energy, which will lead to energy waste. In the case of limited resources, energy waste may aggravate energy supply tension and environmental problems. Second, in terms of environmental pollution, electric energy is usually obtained through fossil fuels or other non-renewable energy sources, and its energy conversion process will emit greenhouse gases such as carbon dioxide and other pollutants. Therefore, the high energy consumption of the electric heating structure may indirectly lead to problems such as environmental pollution and climate change. Third, in terms of increased economic costs, high energy consumption will lead to increased operating costs of the heat storage tank, including electricity consumption and maintenance costs. This may burden the economy of individuals, enterprises or institutions and reduce their competitiveness. Fourth, in terms of sustainability issues, the sustainability of the heat storage tank is affected when energy consumption is high. Excessive consumption of energy may lead to energy depletion and limit the long-term availability of the heat storage tank, so there is an urgent need for a heat storage tank that does not require electric heating.

[0005] 2. It is impossible to detect the pressure inside the thermal storage tank. When the pressure is too high, it may cause damage to the internal structure: First, in terms of safety risks, excessive internal pressure may cause safety accidents such as leakage and explosion in the thermal storage tank, posing a potential threat to personal safety and property. Second, in terms of equipment damage, excessive pressure will bring huge pressure loads to the internal structure and equipment of the thermal storage tank, which may cause rupture or damage to components such as pipelines, thermal storage medium containers, and valves, thereby affecting the normal operation of the thermal storage tank. Third, in terms of energy efficiency reduction, when the internal pressure of the thermal storage tank is too high, the flow properties of the thermal storage medium may be affected, resulting in a decrease in heat transfer efficiency, thereby reducing the energy efficiency of the thermal storage tank. Utility Model Content

[0006] In view of the above problems, the purpose of the utility model is to provide a single-medium multiphase heat storage box, which fills inorganic phase change materials around the water multiphase pipeline and uses the solid-liquid conversion of phase change to achieve heat storage, so as to achieve efficient use of solar energy and valley electricity to heat the crude oil gathering and transportation system and reduce the consumption of gas and electricity in the oil field.

[0007] The technical solution of the utility model is: a single-medium multiphase heat storage tank, comprising a heat storage tank shell, a heat storage tank top cover is arranged on the top of the heat storage tank shell, a water outlet connection hole and a water inlet connection hole are respectively arranged on the heat storage tank top cover, the water outlet connection hole and the water inlet connection hole are respectively provided with connecting pipes, the end of the connecting pipe at the water outlet connection hole is provided with a water outlet hole, and the end of the connecting pipe at the water inlet connection hole is provided with a water inlet hole, a pipe support frame is arranged inside the heat storage tank shell, a water flow multiphase pipe is supported on the pipe support frame, two ends of the water flow multiphase pipe are respectively connected with the water outlet connection hole and the water inlet connection hole, a heat storage tank thermal insulation layer is arranged on the inner wall of the heat storage tank shell, and the space between the heat storage tank thermal insulation layer and the outer wall of the water flow multiphase pipe is filled with inorganic phase change material.

[0008] The heat storage tank top cover is also provided with a heat storage tank pressure monitor, which is a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor or a piezoelectric pressure sensor, and is used to monitor the pressure inside the heat storage tank shell.

[0009] A heat storage tank base is provided at the lower part of the heat storage tank shell.

[0010] The central axis of the connecting pipe is perpendicular to the surface of the top cover of the heat storage tank.

[0011] The inorganic phase change material is in a solid state at 30°C to 70°C, and changes into a liquid state when the temperature reaches 80°C or above.

[0012] The multiphase water flow pipeline is formed by continuously stacking multiple layers of U-shaped pipelines, and the number of stacked layers ranges from 7 to 14. The pipeline support frame is supported at the U-shaped opening of each layer of the multiphase water flow pipeline. The pipe diameter of the multiphase water flow pipeline ranges from Φ12×1.5mm to Φ48×4mm, and the spacing between adjacent multiphase water flow pipelines ranges from 24 to 50mm.

[0013] The technical effects of the utility model are as follows: 1. The utility model achieves heat storage by filling inorganic phase change materials around the multiphase water pipe and utilizing the solid-liquid conversion of phase change. The inorganic phase change materials have a high energy density and can achieve a large amount of energy storage in a relatively small space. Moreover, the solid-liquid phase change of inorganic phase change materials is a physical change. Unlike chemical reactions, its phase change process can be repeated, so it has good long-term stability. In the process of phase change energy storage, the inorganic phase change materials will absorb or release a large amount of latent heat. This energy utilization has a high efficiency and can achieve a higher energy-saving effect. 2. The utility model can monitor the pressure inside the heat storage box by arranging a heat storage box pressure monitor on the top cover of the heat storage box. The pressure value inside the heat storage box can be monitored in real time. Once the pressure is abnormal, an alarm can be issued in time to remind the operator to pay attention to safety. This can avoid the occurrence of safety accidents caused by negligence and improve the safety of the heat storage box.

[0014] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural front view of a single-medium multi-phase heat storage box of the utility model.

[0016] Figure 2 It is a structural side view of a single-medium multi-phase heat storage box of the utility model.

[0017] Figure 3 It is a structural top view of a single-medium multi-phase heat storage box of the utility model.

[0018] Figure 4 It is an internal structure diagram of a single-medium multi-phase heat storage box of the utility model.

[0019] Figure numerals: 1-heat storage tank shell; 2-connecting pipe; 3-heat storage tank insulation layer; 4-water inlet hole; 5-water outlet hole; 6-heat storage tank top cover; 7-water outlet connecting hole; 8-water inlet connecting hole; 9-heat storage tank pressure monitor; 10-heat storage tank base; 11-pipeline support frame; 12-water multiphase pipeline. DETAILED DESCRIPTION Example 1

[0020] like Figure 1~Figure 4As shown, a single-medium multiphase heat storage tank comprises a heat storage tank shell 1, a heat storage tank top cover 6 is provided on the top of the heat storage tank shell 1, a water outlet connection hole 7 and a water inlet connection hole 8 are respectively provided on the heat storage tank top cover 6, a connecting pipe 2 is respectively provided at the water outlet connection hole 7 and the water inlet connection hole 8, a water outlet hole 5 is provided at the end of the connecting pipe at the water outlet connection hole 7, and a water inlet hole 4 is provided at the end of the connecting pipe at the water inlet connection hole 8, a pipe support frame 11 is provided inside the heat storage tank shell 1, a water multiphase pipe 12 is supported on the pipe support frame 11, and two ends of the water multiphase pipe 12 are respectively connected with the water outlet connection hole 7 and the water inlet connection hole 8, a heat storage tank thermal insulation layer 3 is provided on the inner wall of the heat storage tank shell 1, and an inorganic phase change material is filled in the space between the heat storage tank thermal insulation layer 3 and the outer wall of the water multiphase pipe 12.

[0021] The inner wall of the heat storage box shell 1 of the utility model is provided with a heat storage box insulation layer 3, and the space between the heat storage box insulation layer 3 and the outer wall of the water multiphase pipeline 12 is filled with inorganic phase change material. The utility model achieves heat storage by filling inorganic phase change material around the water multiphase pipeline and utilizing solid-liquid conversion of phase change. The inorganic phase change material has a higher energy density and can achieve greater energy storage in a relatively small space. Moreover, the solid-liquid phase change of the inorganic phase change material is a physical change. Unlike chemical reactions, its phase change process can be repeated, so it has better long-term stability. During the phase change energy storage process, the inorganic phase change material absorbs or releases a large amount of latent heat. The utilization of this energy is highly efficient and can achieve higher energy saving effects. Example 2

[0022] On the basis of Example 1, in this embodiment, preferably, a heat storage tank pressure monitor 9 is further provided on the heat storage tank top cover 6, and the heat storage tank pressure monitor 9 is a strain type pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor or a piezoelectric pressure sensor, and the heat storage tank pressure monitor 9 is used to monitor the pressure in the heat storage tank shell 1.

[0023] The heat storage tank top cover 6 of the utility model is also provided with a heat storage tank pressure monitor 9. By providing the heat storage tank pressure monitor on the heat storage tank top cover, the pressure inside the heat storage tank can be monitored, and the pressure value inside the heat storage tank can be monitored in real time. Once the pressure is abnormal, an alarm can be issued in time to remind the operator to pay attention to safety. In this way, the occurrence of safety accidents caused by negligence can be avoided, and the safety of the heat storage tank can be improved. Example 3

[0024] On the basis of Example 1 or Example 2, in this embodiment, preferably, a heat storage tank base 10 is provided at the lower part of the heat storage tank shell 1.

[0025] The heat storage tank housing 1 of the utility model is provided with a heat storage tank base 10 at the lower part, and the heat storage tank base 10 can bear the weight and load of the heat storage tank, so that the structure of the whole device is more stable. Example 4

[0026] On the basis of Example 1 or Example 3, in this embodiment, preferably, the central axis of the connecting pipe 2 is perpendicular to the surface of the heat storage tank top cover 6.

[0027] The central axis of the connecting pipe 2 of the utility model is perpendicular to the surface of the top cover 6 of the heat storage tank, which can more conveniently connect the pipes, reduce the bending and twisting of the pipes, and is conducive to the layout and installation of the pipes. Example 5

[0028] Based on Example 1 or Example 4, in this embodiment, preferably, the inorganic phase change material is in a solid state at 30° C. to 70° C., and changes into a liquid state when the temperature reaches 80° C. or above.

[0029] The inorganic phase change material of the utility model is in solid state at 30℃~70℃, and will change into liquid state when the temperature reaches 80℃ and above, and the temperature of water flow is adjusted by utilizing its characteristics of absorbing and releasing heat. The water flow exchanges heat with the inorganic phase change material through the water flow multiphase pipeline 12, thereby keeping the water flow temperature stable at 80 degrees. The inorganic phase change material absorbs the overheated heat, so that the temperature of the water flow will not exceed the set optimal heating crude oil temperature, thereby achieving the purpose of temperature control. Example 6

[0030] On the basis of Example 1 or Example 5, in this embodiment, preferably, the water flow multiphase pipe 12 is formed by continuously stacking multiple layers of U-shaped pipes, and the number of stacked layers ranges from 7 to 14. The pipe support frame 11 is supported at the U-shaped opening of each layer of the water flow multiphase pipe 12. The pipe diameter of the water flow multiphase pipe 12 ranges from Φ12×1.5mm to Φ48×4mm, and the spacing between adjacent water flow multiphase pipes 12 ranges from 24 to 50mm.

[0031] The multiphase water flow pipeline 12 of the utility model is formed by continuously stacking multiple layers of U-shaped pipelines. The pipeline support frame 11 is supported at the U-shaped opening of each layer of the multiphase water flow pipeline 12. The multiple layers of U-shaped pipelines are continuously stacked to ensure that the multiphase water flow pipeline 12 can have a larger contact area with the inorganic phase change material, thereby improving energy utilization.

[0032] 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 changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A single-medium multiphase heat storage tank, characterized in that: The invention comprises a heat storage tank shell (1), wherein a heat storage tank top cover (6) is provided on the top of the heat storage tank shell (1), a water outlet connection hole (7) and a water inlet connection hole (8) are respectively provided on the heat storage tank top cover (6), a connecting pipe (2) is respectively provided at the water outlet connection hole (7) and the water inlet connection hole (8), a water outlet hole (5) is provided at the end of the connecting pipe at the water outlet connection hole (7), and a water inlet hole (4) is provided at the end of the connecting pipe at the water inlet connection hole (8), a pipe support frame (11) is provided inside the heat storage tank shell (1), a water multiphase pipe (12) is supported on the pipe support frame (11), and two ends of the water multiphase pipe (12) are respectively connected to the water outlet connection hole (7) and the water inlet connection hole (8), a heat storage tank thermal insulation layer (3) is provided on the inner wall of the heat storage tank shell (1), and an inorganic phase change material is filled in the space between the heat storage tank thermal insulation layer (3) and the outer wall of the water multiphase pipe (12).

2. A single-medium multi-phase thermal storage tank according to claim 1, characterized in that: The heat storage tank top cover (6) is also provided with a heat storage tank pressure monitor (9), the heat storage tank pressure monitor (9) being a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor or a piezoelectric pressure sensor, and the heat storage tank pressure monitor (9) is used to monitor the pressure in the heat storage tank housing (1).

3. According to claim 1, a single-medium multi-phase thermal storage tank is characterized in that: A heat storage tank base (10) is provided at the lower part of the heat storage tank shell (1).

4. The single-medium multi-phase thermal storage tank according to claim 1, characterized in that: The central axis of the connecting pipe (2) is perpendicular to the surface of the heat storage tank top cover (6).

5. The single-medium multi-phase thermal storage tank according to claim 1, characterized in that: The inorganic phase change material is in a solid state at 30°C to 70°C, and changes into a liquid state when the temperature reaches 80°C or above.

6. The single-medium multi-phase thermal storage tank according to claim 1, characterized in that: The multiphase water flow pipeline (12) is formed by stacking multiple layers of U-shaped pipelines in succession, the number of stacked layers ranging from 7 to 14, the pipeline support frame (11) is supported at the U-shaped opening of each layer of the multiphase water flow pipeline (12), the diameter of the multiphase water flow pipeline (12) ranges from Φ12×1.5mm to Φ48×4mm, and the spacing between adjacent multiphase water flow pipelines (12) ranges from 24 to 50mm.

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