Large-flow high-temperature high-pressure gas-liquid fluid universal heating system with precisely controllable temperature

Abstract

The invention relates to the field of high-temperature and high-pressure gas-liquid fluid heating and energy power experiment equipment, and discloses a high-flow high-temperature and high-pressure gas-liquid fluid universal heating system with the temperature being accurately controllable. Comprising a medium supply system, a nitrogen blowing system, a waste gas cooling and backpressure system, a multi-medium turbine power generation system, a heat storage heating system and a multi-parameter measurement and control system, so that the experiment platform can adapt to gas-liquid phase media and stably and controllably operate; the medium supply system is provided with independent gaseous and liquid medium supply channels. The medium supply system in the system is provided with independent gaseous and liquid working medium supply channels, supports wide flow regulation and large-range pressure control of multiple media such as nitrogen and kerosene, can be matched with gas-phase and liquid-phase media, and stably and controllably operates; the heating requirements of multiple media such as air, cracking gas and closed cycle working media in a ground verification experiment of a ramjet turbine power generation system can be met, and the universality of the system is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of high-temperature and high-pressure gas-liquid fluid heating and energy power experimental equipment, specifically a high-flow-rate, high-pressure gas-liquid fluid universal heating system with precise and controllable temperature. Background Technology

[0002] This high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system features precise temperature control. Utilizing advanced technology, it ensures accurate temperature regulation and control during the heating process. Suitable for heating high-flow-rate, high-temperature, high-pressure gas-liquid fluids, this system boasts broad versatility and can meet the high standards of fluid heating across various industries and fields. Through precise temperature control, the system effectively improves heating efficiency and ensures the stability and safety of the fluid heating process. It is widely used in chemical, petroleum, and pharmaceutical industries, providing reliable technical support for heating various high-temperature, high-pressure gas-liquid fluids.

[0003] Current heating systems have some practical problems that limit the efficient conduct of ground tests: 1. Poor versatility: Traditional experimental systems are usually designed for a single specific medium and cannot achieve efficient and stable heating for fluid media in different phases. 2. Poor scalability: Due to the limitation of maximum heating power, traditional experimental systems have a limited coupling between heating capacity and flow rate, which also limits the maximum heating flow rate. To meet the needs of different flow rate levels of testing, it is often necessary to replace or reconstruct the entire heating system. 3. Poor temperature controllability: Traditional experimental systems use online electric heating, which makes the heating temperature of the medium highly susceptible to interference from the heat transfer state of the flow within the tube, resulting in large fluctuations in the outlet temperature. Therefore, how to reliably, stably, and controllably generate a working medium under a specified thermodynamic state is an urgent problem to be solved. It is necessary to design a ground-based experimental system suitable for the working characteristics of various media, capable of simulating the working medium required by various airborne turbine power generation systems under stable, safe, and controllable conditions. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a universal heating system for high-flow-rate, high-temperature, and high-pressure gas-liquid fluids with precise and controllable temperature, solving problems such as poor adaptability to different phase media, low maximum flow rate, and unstable temperature control in existing heating systems.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control, comprising a medium supply system, a nitrogen purging system, an exhaust gas cooling and back pressure system, a multi-media turbine power generation system, a thermal storage heating system, and a multi-parameter measurement and control system; the output ends of the medium supply system and the nitrogen purging system are connected to the input end of the thermal storage heating system, and the output end of the thermal storage heating system is connected to the input end of the exhaust gas cooling and back pressure system; the multi-media turbine power generation system is connected to the output end of the thermal storage heating system; the medium supply system is provided with independent gaseous and liquid medium supply channels; the thermal storage heating system is composed of modular metal heat storage blocks, the fluid enters the heater through the front manifold, enters the built-in multi-parallel heat exchange channels, and then converges into one channel in the rear manifold to flow to the next thermal storage heating system; the PID temperature controller is electrically connected to the electric heating rod; in the exhaust gas cooling and back pressure system, the output end of the heat exchanger is connected to the input end of the back pressure tank, and a safety valve is installed on the back pressure tank; the multi-parameter measurement and control system is electrically connected to the flow sensor, temperature sensor, and pressure sensor respectively, and is provided with a remote control interface.

[0006] Preferably, the medium supply system includes an oil tank, a plunger pump, a turbine flow meter, an overflow valve, an electric regulating valve, a gas cylinder one, a pressure reducing valve, a differential pressure flow meter, a gas cylinder two, and a solenoid valve. The output end of the oil tank is connected to the input end of the plunger pump, and the output end of the plunger pump is sequentially connected to the overflow valve, the electric regulating valve, and the turbine flow meter. The output end of gas cylinder one is connected to the input end of the pressure reducing valve, and the output end of the pressure reducing valve is connected to the input end of the differential pressure flow meter. The output end of the differential pressure flow meter is connected to the input end of the thermal storage heating system. The output end of gas cylinder two is connected to the input end of the solenoid valve, and the output end of the solenoid valve is connected to the input end of the thermal storage heating system. The electric regulating valve and the pressure reducing valve are both electrically connected to a multi-parameter measurement and control system.

[0007] Preferably, the heat storage heating system includes a metal heat storage heating section, an electric heating rod, a high-power power supply, a PID temperature controller, a DC electrode, and a K-type thermocouple. The metal heat storage block is composed of multiple metal heat storage heating sections arranged in combination. The electric heating rod is installed inside the metal heat storage heating section. The high-power power supply is electrically connected to the PID temperature controller. The PID temperature controller is electrically connected to the electric heating rod through a DC electrode and a copper core flexible wire.

[0008] Preferably, the nitrogen purging system includes a second gas cylinder, a pressure reducing valve, and a solenoid valve. The output end of the second gas cylinder is connected to the input end of the pressure reducing valve, the output end of the pressure reducing valve is connected to the input end of the solenoid valve, and the delivery pipeline is connected to the supply pipeline.

[0009] Preferably, the heat storage heating system, the medium supply system, and the nitrogen purging system are connected by a four-way valve. The output end of the four-way valve is connected to the input end of the metal heat storage heating section. Pressure sensors and thermal resistors are installed at the inlet and outlet of the metal heat storage heating section, respectively. Both the pressure sensors and thermal resistors are electrically connected to the control computer.

[0010] Preferably, in the thermal storage heating system, the metal thermal storage heating section is equipped with 18 parallel heat exchange pipes.

[0011] Preferably, in the thermal storage heating system, distributed K-type thermocouples are welded onto the metal thermal storage heating section, and the K-type thermocouples are electrically connected to the PID temperature controller.

[0012] In a preferred, scalable thermal storage heating system, the four sets of heating modules in the existing design are connected in a series-parallel manner.

[0013] Preferably, in the heat storage heating system, a tin layer is provided in the fitting gap between the electric heating rod and the metal heat storage heating section.

[0014] Preferably, in the exhaust gas cooling system and back pressure system, the back pressure tank is filled with nitrogen, and the heat exchanger adopts a water-cooled heat exchange method.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a universal heating system for high-flow-rate, high-temperature, and high-pressure gas-liquid fluids with precise and controllable temperature, which has the following beneficial effects: 1. This system considers the differences in physical properties of different working media and is equipped with multiple fluid channels. Gases are supplied via compression, while liquids are supplied via pumping. In the cold section, different phase media are transported through separate channels. The media supply system has independent gaseous and liquid working fluid supply channels, supporting wide flow rate adjustment and large-range pressure control for multiple media such as nitrogen and kerosene. It can adapt to gaseous and liquid media and operate stably and controllably. It can meet the heating requirements of various media such as air, pyrolysis gas, and closed-loop working fluids in the ground verification experiment of the ramjet engine turbine power generation system, significantly improving the system's versatility.

[0016] 2. The thermal storage heating system of this system adopts an expandable design, initially with 4 heating modules. It supports soft expansion, and the heating channels can be arranged and combined in various forms such as all in series, two in series and then in parallel, or all four in parallel. It is backward compatible with small flow experiments and can operate a heating module alone. At the same time, it supports hard expansion. For larger flow experiments, new modules can be upgraded and expanded after the original heating modules. This flexible expansion allows the system to be compatible with various flow requirements at the lowest cost without replacing or reconstructing the entire system. It effectively solves the problem of poor scalability and adapts to the simulation requirements of turbine power generation systems for different flow working media at different Mach numbers.

[0017] 3. This system employs an electric heating method based on a heat storage metal block. This heat storage method minimizes system interference and offers strong controllability. Distributed K-type thermocouples are welded onto the metal heat storage heating section, feeding temperature information back to a PID temperature controller. The PID controller first heats the metal block to the specified temperature. After the power is disconnected, the high heat capacity of the metal heat storage block allows the medium to gradually heat up to and maintain the specified temperature after passing through each stage of the metal heat storage block during a short-term test. This effectively avoids interference from the flow heat transfer state on the heating temperature. Simultaneously, the PID temperature controller controls the heating power of the electric heating rod in real time, ensuring the working medium accurately reaches the set temperature at the outlet of the metal heat storage heating section. This significantly improves temperature controllability, ensuring the reliable, stable, and controllable generation of the working medium in the specified thermodynamic state, meeting the precise temperature requirements of the working medium in ground verification experiments.

[0018] 4. This system is equipped with a nitrogen purging system, which provides 2MPa nitrogen purging gas after passing through a pressure reducing valve. This can remove residual experimental media in the test pipeline, ensuring the safe operation and long-term storage of the heating system. The exhaust gas cooling and back pressure system can cool and separate the high-temperature working fluid at the turbine outlet. The back pressure tank is filled with nitrogen to maintain an inert environment, preventing the potential flammability of the high-temperature working fluid. It is equipped with a safety valve and a rapid exhaust function to ensure exhaust safety. The multi-parameter measurement and control system realizes real-time monitoring, remote control and emergency shutdown functions for multiple experimental parameters, ensuring the safety and controllability of the experimental process and providing a strong guarantee for the efficient conduct of ground verification experiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall system of a high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control proposed in this invention; Figure 2 This is a simplified schematic diagram of the system structure of a high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control proposed in this invention. Figure 3 This is a schematic diagram of an expandable thermal storage heating system for a high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control proposed in this invention. Figure 4 This is a schematic diagram of the oblique cross-section flow channel and manifold of the heat storage heating component of a high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control proposed in this invention. Figure 5 This is a schematic diagram of the heat storage heating component manifold of a high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control proposed in this invention. Figure 6 This is a schematic diagram of the electric heating rod structure of a high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control proposed in this invention.

[0020] In the diagram: 1. Oil tank; 2. Plunger pump; 3. Turbine flow meter; 4. Overflow valve; 5. Electric regulating valve; 6. Gas cylinder one; 7. Pressure reducing valve; 8. Differential pressure flow meter; 9. Gas cylinder two; 10. Solenoid valve; 11. Four-way valve; 12. Metal thermal storage heating section; 13. K-type thermocouple; 14. Electric heating rod; 15. Copper core flexible wire; 16. High-power power supply; 17. PID temperature controller; 18. DC electrode; 19. Pressure sensor; 20. Resistance temperature detector; 21. Medium supply system; 22. Nitrogen purging system; 23. Exhaust gas cooling and back pressure system; 24. Multi-media turbine power generation system; 25. Thermal storage heating system; 26. Heat exchanger; 27. Back pressure tank; 28. Safety valve. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-6 A high-flow-rate, high-temperature, high-pressure gas-liquid fluid universal heating system with precise temperature control is disclosed, comprising a medium supply system 21, a nitrogen purging system 22, an exhaust gas cooling and back pressure system 23, a multi-medium turbine power generation system 24, a thermal storage heating system 25, and a multi-parameter measurement and control system. The outputs of the medium supply system 21 and the nitrogen purging system 22 are connected to the input of the thermal storage heating system 25, and the output of the thermal storage heating system 25 is connected to the input of the exhaust gas cooling and back pressure system 23. The multi-medium turbine power generation system 24 is connected to the output of the thermal storage heating system 25. The medium supply system 21 has an independent... The gaseous and liquid media supply channels; the heat storage heating system 25 is composed of modular metal heat storage blocks. The fluid enters the heater through the front manifold and enters the built-in multi-parallel heat exchange channels. Then, it is gathered in the rear manifold and flows into the next heat storage heating system 25. The PID temperature controller 17 is electrically connected to the electric heating rod 14. In the exhaust gas cooling and back pressure system 23, the output end of the heat exchanger 26 is connected to the input end of the back pressure tank 27. A safety valve 28 is installed on the back pressure tank 27. The multi-parameter measurement and control system is electrically connected to the flow sensor, temperature sensor and pressure sensor 19 respectively, and is equipped with a remote control interface.

[0023] In this embodiment, the temperature-controlled high-flow-rate universal heating system achieves adaptability and stable and controllable operation of gas-liquid phase media through the coordinated operation of the medium supply system 21, nitrogen purging system 22, exhaust gas cooling and back pressure system 23, multi-media turbine power generation system 24, heat storage heating system 25 and multi-parameter measurement and control system. Considering the different physical properties of different working media, this system uses different pressure supply schemes for different media, supporting extrusion supply for gas and pump supply for liquid. In the design, a split channel is used for the cold state section for different phase media. Compared with the prior art, it is equipped with multiple fluid channels, which can use different pressure supply and flow monitoring methods for different media, and is equipped with a nitrogen purging branch. The system has strong adaptability and good flexibility. The media supply system 21 has independent gaseous and liquid media supply channels. In the liquid phase supply regulation system, for common liquid working fluids, a high-pressure gear pump or oil plunger pump is used to achieve the desired flow regulation requirements, and an overflow valve is used for downstream pressure control. The controllable opening of the electric regulating valve 5 can achieve decoupling of flow rate and pressure difference. This part can provide 0.1~0.8 The system offers an adjustable flow rate of kg / s and a maximum pressure of 14 MPa, with a turbine flow meter 8 for monitoring and a check valve to prevent backflow. In the gas phase supply regulation system, for common gaseous working media, a pressure reducing valve 7 is used to uniformly regulate the gas source pressure, and multiple gas sources can be connected in parallel to achieve precise pressure control from 0 to 20 MPa. A throttling orifice plate and a differential pressure flow meter are used to regulate and detect the flow rate of the gas medium. The electric regulating valve 5 is connected to a multi-parameter measurement and control system, and the control computer can monitor the real-time flow rate and control the flow rate of the test medium by adjusting its opening. The pressure reducing valve 7 is connected to the multi-parameter measurement and control system and can control the gas source pressure and flow rate by adjusting its opening, thus supporting wide flow rate regulation and wide pressure control for multiple media such as nitrogen and kerosene. The above technical solutions decouple the medium heating method and the supply method. The thermal storage heating system 25 consists of modular metal thermal storage blocks, including a metal thermal storage heating section 12, an electric heating rod 14, a high-power power supply 16, a PID temperature controller 17, a DC electrode 18, and a K-type thermocouple 13. The system is designed with an electric heating method based on the thermal storage metal block. This method minimizes interference with the measurement system, offers strong controllability, and allows for the addition of a temperature control system to ensure the safety of the experimental system. The metal thermal storage blocks in each module of the thermal storage heating system 25 are made of 310S stainless steel, with a maximum temperature resistance of 1200K. Six circular holes along the axial direction on the end face are provided for inserting the electric heating rod 14. The electric heating rod 14 has a rated power of 1kW. After entering through the external pipe, the working fluid first passes through a manifold, then splits into 18 parallel heat exchange channels. Symmetrical distribution ensures low flow deviation in the channels. Finally, the fluid converges at the rear end and flows out into the next heating module. The heating module is composed of multiple metal heat storage heating sections 12 arranged in combination. This system has an expansion connection scheme, supporting soft expansion. Initially, four heating modules are designed, and the system can be arranged in series, in pairs in series and then in parallel, or in all four parallel configurations to combine the heating channels. This allows the system to be backward compatible with small flow experiments, and a single heating module can operate independently, achieving high efficiency and energy saving. It also supports hard expansion; for potentially larger flow experiments, new modules can be added after the existing heating modules. This flexible expansion allows the system to meet various flow requirements with minimal cost. The electric heating rod 14 is installed inside the metal heat storage heating section 12. During the assembly of the metal heat storage block and the heating rod, considering the adverse effect of gas thermal resistance in the mating gap on heat transfer, the heating rod is tin-plated. This tin plating layer acts as a bonding agent between the electric heating rod 14 and the metal heat storage block in the cold, idle state. In the hot working state, the molten tin acts as a high thermal conductivity medium between the electric heating rod 14 and the metal heat storage block, ensuring the system's heat exchange efficiency and reducing energy consumption. A high-power power supply 16 is connected to a PID temperature controller 17. Its internal rectifier converts AC to DC, which is then connected to the electric heating rod 14 via DC electrodes 18 and copper core flexible wires 15. Distributed K-type thermocouples 13 welded to the metal heat storage heating section 12 monitor the wall temperature and feed the signal back to the PID temperature controller 17. The PID controller first controls the heating metal block to heat to the specified temperature, then disconnects the power. Due to its high heat capacity, the test medium is then introduced, ensuring that the medium gradually heats up to the specified temperature and maintains it after passing through each stage of the metal heat storage block during a short-term test, thus accurately controlling the temperature of the test medium. For multiple tests, the power can be reconnected for supplementary heating, making operation convenient and ensuring that the working medium accurately reaches the set temperature at the outlet of the metal heat storage heating section 12. Compared with existing technologies, the heat storage form of the expandable heat storage heating device has less interference to the system, stronger controllability, and the temperature control system ensures system safety. The cost is significantly reduced compared to a high-power DC power supply. The expandable design allows the system to have high flexibility and a high threshold flow range, and the temperature PID control makes the system stable, accurate, and controllable. The delivery pipeline of the nitrogen purging system 22 is connected to the supply pipeline. The system channel is equipped with the nitrogen purging system 22, which provides 2MPa nitrogen purging gas after passing through the pressure reducing valve 7. It is connected through the four-way valve 11 to ensure the safe operation and long-term placement of the heating system and to purge the experimental medium remaining in the test pipeline. The exhaust gas cooling and back pressure system 23 employs a heat exchanger 26 and a back pressure tank 27. This system is used to cool and separate the high-temperature working fluid at the turbine outlet. Cooling is achieved through a circulating water supply, with a high-pressure water pump meeting the required cooling water flow rate. A vertical multistage centrifugal pump is used to ensure long-term operation. The back pressure is maintained in the high-pressure back pressure tank 27, ensuring back pressure stability during short-term testing. The back pressure tank 27 is filled with nitrogen to maintain an inert environment, preventing potential flammability hazards from the high-temperature working fluid. It is also equipped with a safety valve 28 and a rapid exhaust function. This system cools the outlet medium and maintains the system back pressure, ensuring back pressure stability during short-term testing. Automatic pressure control is achieved through the safety valve 28, and the inert atmosphere prevents spontaneous combustion within the tank. It also features rapid exhaust functionality. Compared to existing technologies, the exhaust gas cooling device effectively cools and separates the high-temperature medium at the turbine outlet, ensuring exhaust safety and meeting the limitations of long service life and space constraints. The multi-parameter measurement and control system integrates flow, temperature, and pressure sensors 19 and a remote control interface. The heating device pipeline, gaseous working fluid supply device, liquid working fluid supply device, and purging device are connected by a four-way valve 11. Pressure sensor 19 and RTD 20 measure the inlet and outlet pressure and temperature parameters of the working medium entering and exiting the metal heat storage heating section 12 and transmit them to the control computer. The measurement and control system of this experiment needs to remotely control the switching valves of the oil and gas circuits and provide feedback on their switching status. It has the functions of timing control, conditional control, and manual control of the on / off sequence of various electrical control devices in the system. At the same time, it can set flow, temperature, pressure, and vibration sensors to realize real-time monitoring of experimental parameters, and realize real-time monitoring, remote control, and emergency shutdown functions for multiple experimental parameters. During the experimental operation, for liquid working fluid experiments, first open the main control solenoid valve 10 and the bypass control shut-off valve, and then open the nitrogen purging control solenoid valve 10 to purge nitrogen for approximately 30 seconds. For gaseous working fluid experiments, open the pressure reducing valve 7, the electric regulating valve 5, and the bypass control shut-off valve to regulate the gas source pressure before purging nitrogen. After purging, close the relevant valves, manually start the heating device power supply to heat the heater, and when the wall temperature of the metal heat storage heating section 12 reaches the set temperature, the PID temperature controller 17 stops heating, and the supply device starts supplying the liquid working fluid via a plunger. Pump 2 starts, and after the flow rate is adjusted by the electric regulating valve 5, it quickly passes through the metal heat storage heating section 12 and is heated to the predetermined value before entering the test section. The gaseous working medium is controlled by adjusting the opening of the manifold valve. After the gas supply starts, the flow rate is controlled by the pressure reducing valve 7 and the needle valve. It quickly passes through the metal heat storage heating section 12 and is heated to the predetermined value before entering the test section. At the same time, the exhaust gas cooling system is turned on to cool the outlet medium. After the test is completed, the supply device is turned off, the bypass shut-off valve and the nitrogen purging system 22 are turned on, and after the system returns to room temperature, the nitrogen purging control solenoid valve 10 is turned off, and the test is completed.

[0024] Working principle: This high-flow-rate universal heating system with precise temperature control achieves adaptability and stable, controllable operation of gaseous and liquid media through the coordinated operation of a medium supply system 21, a nitrogen purging system 22, an exhaust gas cooling and back pressure system 23, a multi-media turbine power generation system 24, a thermal storage heating system 25, and a multi-parameter measurement and control system. The medium supply system 21 has independent gaseous and liquid working fluid supply channels. An electric regulating valve 5 is connected to the multi-parameter measurement and control system, and the control computer can monitor the real-time flow rate and control the test medium flow rate by adjusting its opening. A pressure reducing valve 7 is also connected to the multi-parameter measurement and control system and can control the gas source pressure and flow rate by adjusting its opening. The system provides wide-range flow regulation and pressure control for multiple media such as nitrogen and kerosene. The thermal storage heating system 25 consists of modular metal thermal storage blocks, including a metal thermal storage heating section 12, an electric heating rod 14, a high-power power supply 16, a PID temperature controller 17, a DC electrode 18, and a K-type thermocouple 13. The heating module is composed of multiple metal thermal storage heating sections 12 arranged together. The electric heating rod 14 is installed inside the metal thermal storage heating section 12. During installation, tin plating is used in the fitting gap to reduce air gap thermal resistance. The high-power power supply 16 is connected to the PID temperature controller 17, whose internal rectifier converts AC power to DC power, which is then transmitted through the DC electrode 18. A copper core flexible wire 15 is connected to an electric heating rod 14. A K-type thermocouple 13 welded to the metal heat storage heating section 12 monitors the wall temperature and feeds the signal back to the PID temperature controller 17. The PID temperature controller 17 controls the heating power of the electric heating rod 14 in real time, so that the working fluid reaches the set temperature precisely at the outlet of the metal heat storage heating section 12. At the same time, after the fluid enters the heater, it enters the built-in multi-parallel heat exchange channel through the front manifold, and then converges into one channel in the rear manifold to flow to the next heat storage heating module, thereby supporting heating over a wide flow range. The nitrogen purging system 22 is connected to the supply pipeline to purge the experimental medium remaining in the test pipeline. Exhaust gas cooling The back pressure system 23 uses a heat exchanger 26 and a back pressure tank 27. The back pressure tank 27 is filled with nitrogen to maintain an inert environment and is equipped with a safety valve 28 and a rapid exhaust function, which can cool the outlet medium and maintain the system back pressure. The multi-parameter measurement and control system integrates flow, temperature, and pressure sensors 19 and a remote control interface. The heating device pipeline, gaseous working medium supply device, liquid working medium supply device and purging device are connected by a four-way valve 11. The pressure sensor 19 and the thermal resistor 20 measure the inlet and outlet pressure and temperature parameters of the working medium entering and exiting the metal heat storage heating section 12 and transmit them to the control computer to realize the real-time monitoring, remote control and emergency shutdown functions of multi-parameters in the experiment.During the experimental operation, for liquid working fluid experiments, first open the main control solenoid valve 10 and the bypass control shut-off valve, then open the nitrogen purging control solenoid valve 10 to purge nitrogen for approximately 30 seconds. For gaseous working fluid experiments, open the pressure reducing valve 7, the electric regulating valve 5, and the bypass control shut-off valve to regulate the gas source pressure before purging nitrogen. After purging, close the relevant valves, manually start the heating device power supply to heat the heater. When the wall temperature of the metal heat storage heating section 12 reaches the set temperature, the PID temperature controller 17 stops heating, and the supply device starts supplying the liquid working fluid via a plunger. Pump 2 starts, and after the flow rate is regulated by electric regulating valve 5, it quickly passes through the metal heat storage heating section 12, and is heated step by step to the predetermined value before entering the test section. The gaseous working medium is controlled by adjusting the opening of the manifold valve to adjust the required pressure. After the gas supply starts, the flow rate is regulated by pressure reducing valve 7 and needle valve, and it quickly passes through the metal heat storage heating section 12 to be heated to the predetermined value before entering the test section. At the same time, the exhaust gas cooling system is turned on to cool the outlet medium. After the test is completed, the supply device is turned off, the bypass shut-off valve and the nitrogen purging system 22 are turned on, and after the system returns to room temperature, the nitrogen purging control solenoid valve 10 is turned off, and the test ends.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control, characterized in that: The system includes a medium supply system (21), a nitrogen purging system (22), an exhaust gas cooling and back pressure system (23), a multi-medium turbine power generation system (24), a thermal storage heating system (25), and a multi-parameter measurement and control system. The output ends of the medium supply system (21) and the nitrogen purging system (22) are connected to the input end of the thermal storage heating system (25), and the output end of the thermal storage heating system (25) is connected to the input end of the exhaust gas cooling and back pressure system (23). The multi-medium turbine power generation system (24) is connected to the output end of the thermal storage heating system (25). The medium supply system (21) is equipped with independent gaseous and liquid medium supply channels. The heat storage heating system (25) is composed of modular metal heat storage blocks. The fluid enters the heater through the front manifold and enters the built-in multi-parallel heat exchange channel. Then, it is gathered in the rear manifold and flows into the next heat storage heating system (25). The PID temperature controller (17) is electrically connected to the electric heating rod (14). In the exhaust gas cooling and back pressure system (23), the output end of the heat exchanger (26) is connected to the input end of the back pressure tank (27). A safety valve (28) is installed on the back pressure tank (27). The multi-parameter measurement and control system is electrically connected to the flow sensor, temperature sensor and pressure sensor (19) respectively, and is equipped with a remote control interface.

2. The universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 1, characterized in that: The medium supply system (21) includes an oil tank (1), a plunger pump (2), a turbine flow meter (3), an overflow valve (4), an electric regulating valve (5), a gas cylinder (6), a pressure reducing valve (7), a differential pressure flow meter (8), a gas cylinder (9), and a solenoid valve (10). The output end of the oil tank (1) is connected to the input end of the plunger pump (2), and the output end of the plunger pump (2) is connected in sequence to the overflow valve (4), the electric regulating valve (5), and the turbine flow meter (3). The output end of the gas cylinder (6) is connected to the input end of the pressure reducing valve (7), and the output end of the pressure reducing valve (7) is connected to the input end of the differential pressure flow meter (8). The output end of the differential pressure flow meter (8) is connected to the input end of the heat storage heating system (25). The output end of the gas cylinder (9) is connected to the input end of the solenoid valve (10). The output end of the solenoid valve (10) is connected to the input end of the heat storage heating system (25). The electric regulating valve (5) and the pressure reducing valve (7) are both electrically connected to the multi-parameter measurement and control system.

3. The universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 1, characterized in that: The heat storage heating system (25) includes a metal heat storage heating section (12), an electric heating rod (14), a high-power power supply (16), a PID temperature controller (17), a DC electrode (18), and a K-type thermocouple (13). The metal heat storage block is composed of multiple metal heat storage heating sections (12) arranged in combination. The electric heating rod (14) is installed inside the metal heat storage heating section (12). The high-power power supply (16) is electrically connected to the PID temperature controller (17). The PID temperature controller (17) is electrically connected to the electric heating rod (14) through the DC electrode (18) and a copper core flexible wire (15).

4. The universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 1, characterized in that: The nitrogen purging system (22) includes a second gas cylinder (9), a pressure reducing valve (7) and a solenoid valve (10). The output end of the second gas cylinder (9) is connected to the input end of the pressure reducing valve (7), and the output end of the pressure reducing valve (7) is connected to the input end of the solenoid valve (10). The delivery pipeline of the nitrogen purging system (22) is connected to the supply pipeline.

5. The universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 1, characterized in that: The heat storage heating system (25), the medium supply system (21) and the nitrogen purging system (22) are connected by a four-way valve (11). The output end of the four-way valve (11) is connected to the input end of the metal heat storage heating section (12). Pressure sensors (19) and thermal resistors (20) are installed at the inlet and outlet of the metal heat storage heating section (12), respectively. Both pressure sensors (19) and thermal resistors (20) are electrically connected to the control computer.

6. The universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 3, characterized in that: The metal heat storage heating section (12) is equipped with 18 parallel heat exchange pipes to increase heat exchange efficiency.

7. The universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 1, characterized in that: In the thermal storage heating system (25), a distributed K-type thermocouple (13) is welded on the metal thermal storage heating section (12), and the K-type thermocouple (13) is electrically connected to the PID temperature controller (17).

8. The universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 1, characterized in that: In the expandable thermal storage heating system (25), four sets of heating modules are connected in series and then in parallel.

9. A universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 3, characterized in that: A tin layer is provided in the gap between the electric heating rod (14) and the metal heat storage heating section (12) to increase the thermal conductivity between the two.

10. A universal heating system for high-flow-rate, high-temperature, high-pressure gas-liquid fluids with precise temperature control according to claim 1, characterized in that: The back pressure tank (27) is filled with nitrogen to prevent the contents of the tank from being oxidized. The heat exchanger (26) adopts a water-cooled heat exchange method to shorten the heat exchange time.

Images