High temperature and high pressure gas turbine experimental device

Abstract

The invention discloses a high-temperature and high-pressure gas-containing turbine experimental device, comprising a dynamometer connected to a hydraulic turbine, a liquid storage tank, a liquid supply tank with an electric heating tube, a pressure-stabilizing tank, a gas storage tank, a hot water heat pump unit with a tube bundle heat exchanger, an expansion tube made of a magnetophilic metal, and an electromagnetic mixing device, wherein the pressure-stabilizing tank is placed on a vertically adjustable lift; the electromagnetic mixing device is composed of a magnetic wheel and a magnetic component matched with the magnetic wheel, and the magnetic component is externally connected to a power supply; the magnetic wheel is placed in the inner cavity of the expansion tube, and the magnetic component is sheathed on the periphery of the expansion tube. The device can be used to study the flow of gas-containing hydraulic turbines under high temperature and high pressure and the working mechanism of gas-containing hydraulic turbines.

Description

Technical Field

[0001] The invention belongs to the field of fluid mechanical engineering and energy conversion technology, and specifically relates to a gas-containing turbine experimental device, and in particular to a high-temperature and high-pressure gas-containing turbine experimental device. Background Art

[0002] With the increase in crude oil prices, the improvement of oil quality requirements, and the maturity of high-pressure hydrogenation technology, high-pressure hydrogenation units are gradually being used more widely, which requires that the reaction feed pump - hydraulic turbine pump group, an important equipment of high-temperature and high-pressure hydrogenation units, must maintain stable operation. This type of device has a high degree of similarity in technology. They are all high-temperature and high-pressure devices. There is excess liquid pressure energy that can be recycled in the process flow, which also provides a source of demand for the application of hydraulic turbines. In engineering practice, when hydraulic turbines recover high-pressure liquids in industries such as synthetic ammonia and petrochemicals, they often contain a certain amount of gas. The presence of gas will cause unstable flow in the impeller flow channel and form a vortex, which will lead to increased hydraulic losses of hydraulic turbines, lower energy recovery efficiency, and poor stability. These have put forward higher requirements on the working stability of centrifugal pumps.

[0003] At present, there are still problems such as unstable operation and low efficiency in the domestic high-temperature and high-pressure gas-containing hydraulic turbine tests, and there is no special systematic theory to guide them. Therefore, the mechanism of the influence of high-pressure gas on the energy recovery of hydraulic turbines is still unclear. In order to solve the problem of the influence of such gas-liquid phases on the stability of turbine operation, in addition to using theoretical analysis and numerical simulation methods to deeply study the characteristics of hydraulic turbines and internal flow mechanisms, experiments are indispensable, such as high-temperature and high-pressure gas-containing hydraulic turbine operation stability tests.

[0004] Currently, there are no national standards or relevant literature on the test of high-temperature and high-pressure hydraulic turbine operating stability, and there is even less relevant information on the test of hydraulic turbines in gas-containing media.

[0005] It is quite difficult to carry out high-temperature and high-pressure gas-containing hydraulic turbine experiments in actual operation: on the one hand, because the test is carried out under extraordinary pressure, it puts a great test on the pressure stabilization performance of the device. Unstable pressure may cause uneven gas and liquid in the flow channel, affecting the operation stability. On the other hand, if the insulation measures are not implemented properly or high-temperature liquid leaks, it will cause personal injury. Summary of the invention

[0006] The problem to be solved by the present invention is to provide a high-temperature and high-pressure gas-containing turbine experimental device, which can be used to study the flow of gas-containing hydraulic turbines under high temperature and high pressure and the working mechanism of gas-containing hydraulic turbines.

[0007] In order to solve the above technical problems, the present invention provides a high-temperature and high-pressure gas-containing turbine experimental device, comprising a dynamometer connected to a hydraulic turbine, a liquid storage tank, a liquid supply tank with an electric heating pipe, a pressure-stabilizing tank, a gas storage tank, a hot water heat pump unit with a tube bundle heat exchanger, an expansion tube made of a magnetophilic metal, and an electromagnetic mixing device, wherein the pressure-stabilizing tank is placed on a lifting platform that can be adjusted up and down;

[0008] The outlet of the liquid storage tank is connected to the inlet of the liquid supply tank through the first regulating valve and the high-pressure pump in sequence;

[0009] A check valve is provided at the inlet of the pressure stabilizing tank, the outlet of the liquid supply tank is connected to the check valve after passing through the second regulating valve, and the air storage tank is connected to the check valve through the air compressor, needle valve, and ventilation nozzle in sequence;

[0010] The lower outlet of the pressure stabilizing tank is connected to the drain tank through a water seal gate valve, and the upper outlet of the pressure stabilizing tank is connected to the inlet of the expansion tube through the third regulating valve and the tube bundle heat exchanger in sequence;

[0011] The electromagnetic mixing device is composed of a magnetic wheel and a magnetic assembly matched with the magnetic wheel, and the magnetic assembly is externally connected to a power source; the magnetic wheel is placed in the inner cavity of the expansion tube, and the magnetic assembly is sleeved on the periphery of the expansion tube;

[0012] The outlet of the expansion tube is connected to the inlet of the hydraulic turbine through the damping pulsator, the outlet of the hydraulic turbine is connected to the inlet of the gas-liquid separator through the safety valve, the gas outlet of the gas-liquid separator is connected to the gas storage tank, and the liquid outlet of the gas-liquid separator is connected to the liquid storage tank.

[0013] As an improvement of the high-temperature and high-pressure gas-containing turbine experimental device of the present invention: the high-temperature and high-pressure gas-containing turbine experimental device also includes a high-speed camera and a light source; the camera head of the high-speed camera is facing the hydraulic turbine, and the light source is facing the hydraulic turbine.

[0014] As a further improvement of the high-temperature and high-pressure gas-containing turbine experimental device of the present invention: a first pressure gauge is provided on the liquid supply tank, and a second pressure gauge is provided on the pressure stabilizing tank; a first temperature sensor is provided on the pipeline between the outlet of the liquid supply tank and the second regulating valve, and a high-temperature flowmeter is provided on the pipeline at the outlet of the second regulating valve; a gas flowmeter is provided on the pipeline between the needle valve and the ventilation nozzle; a second temperature sensor is provided on the pipeline between the tube bundle heat exchanger and the expansion tube; a gas sensor and a third pressure gauge are provided on the pipeline between the outlet of the expansion tube and the damping pulsator.

[0015] As a further improvement of the high-temperature and high-pressure gas-containing turbine experimental device of the present invention: the outer surfaces of the liquid storage tank, the liquid supply tank, the pressure stabilizing tank, and the liquid discharge tank are provided with a heat insulation layer, and except for the gas circulation pipeline (that is, except for the pipeline from the gas storage tank to the ventilation nozzle, and the pipeline from the gas-liquid separator to the gas storage tank), the outer surfaces of the remaining pipelines are provided with a heat insulation layer. The heat insulation layer can be made of aluminum silicate fiber material, for example.

[0016] As a further improvement of the high-temperature and high-pressure gas-containing turbine experimental device of the present invention: the shell of the hydraulic turbine is a square cavity made of transparent material, and the inlet and outlet of the hydraulic turbine are both square tubes.

[0017] As a further improvement to the high-temperature and high-pressure gas-containing turbine experimental device of the present invention, the outlet of the expansion tube and the inlet of the hydraulic turbine are both arranged vertically.

[0018] As a further improvement to the high-temperature and high-pressure gas-containing turbine experimental device of the present invention: the diameter of the ventilation nozzle is 2 mm.

[0019] The present invention provides a device suitable for experimental research of hydraulic turbines in high-temperature and high-pressure gas-containing media, which is used to study the flow of gas-containing hydraulic turbines under high temperature and high pressure and the working mechanism of gas-containing hydraulic turbines.

[0020] The high-temperature and high-pressure gas-containing hydraulic turbine device of the present invention has the following technical advantages:

[0021] 1. The system pressure is stable and adjustable. This device combines the pressure stabilizing tank with the lifting platform to maintain the system pressure stable while achieving adjustable turbine inlet pressure.

[0022] An expansion pipe is arranged at the outlet section of the pressure-stabilizing tank, thereby solving the problem of unstable pressure in the prior art.

[0023] 2. The magnetic wheel of the electromagnetic mixing device can adjust the speed accordingly by adjusting the electrical parameters of the magnetic component. The gas sensor monitors the flow of the pipeline and can flexibly adjust the gas content according to different working conditions.

[0024] That is, this experimental device uses a magnetic component to control the electromagnetic wheel to adjust the gas content of the liquid. The electromagnetic mixing device has no contact with the pipeline, avoiding pressure changes caused by leakage at the interface between the conventional gas-liquid mixing device and the pipeline, thereby solving the problem of high-temperature liquid leakage in the prior art.

[0025] The electromagnetic mixing device of the present invention has a compact structure, which not only reduces the volume of the device, but also performs gas-liquid fusion during the flow of liquid, thereby reducing the time of gas-liquid fusion and improving the efficiency of gas-liquid fusion.

[0026] 3. The system has strong thermal insulation capability.

[0027] In order to maintain the temperature of the liquid, a tubular heat exchanger with a heat pump hot water unit (i.e., a hot water heat pump unit with a tube bundle heat exchanger) is installed at the outlet of the pressure-stabilizing tank. Therefore, the hot water heat pump unit can effectively maintain the temperature of the liquid passing through the tube bundle heat exchanger. In addition, the outer surface of the pipeline through which the liquid and gas-liquid phases pass, as well as the outer surface of the liquid storage tank, liquid supply tank, pressure-stabilizing tank, and liquid discharge tank are provided with an insulation layer, which can prevent the temperature change of the liquid in the pipeline as much as possible, greatly reducing the phenomenon of high liquid heat loss in the pipeline, thereby ensuring that the subsequent experiments can be carried out smoothly.

[0028] 4. The pump casing is transparent and visible.

[0029] The pump casing adopts a square cavity structure made of plexiglass. The outer surfaces of the inlet and outlet pipes are made into squares to prevent strong reflections from the circular pipe due to the illumination of the light source, so as to observe possible internal flow details. The internal morphology and flow pattern evolution of the impeller are captured through high-speed photography, and the gas-liquid two-phase flow of the turbine and the working mechanism of the high-pressure gas-containing hydraulic turbine are studied. It has the characteristics of stable operation, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of a high-temperature and high-pressure gas-liquid turbine experimental device;

[0032] Figure 2 for Figure 1 An enlarged schematic diagram of the lifting platform 16 and the surge tank 18, etc.;

[0033] Figure 3 for Figure 1 An enlarged schematic diagram of the electromagnetic mixing device 26 and the expansion tube 25;

[0034] Figure 4 for Figure 3 A schematic cross-sectional view along the cross-sectional direction of the pipeline;

[0035] Figure 5 for Figure 1 An enlarged schematic diagram of a visualization device such as a hydraulic turbine 32;

[0036] The numbers in the figure are as follows:

[0037] 1. Liquid storage tank; 2. First regulating valve; 3. High-pressure pump; 4. Electric heating tube; 5. Liquid supply tank; 6. First pressure gauge; 7. First temperature sensor; 8. Second regulating valve; 9. High-temperature flow meter; 10. Gas storage tank; 11. Air compressor; 12. Needle valve; 13. Gas flow meter; 14. Ventilation nozzle; 15. Check valve; 16. Lifting platform; 17. Second pressure gauge; 18. Pressure regulating tank; 19. Third regulating valve; 20. Water seal gate valve; 21. Drain tank; 22. Tube bundle heat exchanger; 23. Hot water heat pump unit; 24. Second temperature sensor; 25. Expansion tube; 26. Electromagnetic mixing device; 27. Gas sensor; 28. Third pressure gauge; 29. ​​High-speed camera; 30. Damping pulsator; 31. Light source; 32. Hydraulic turbine; 33. Dynamometer; 34. Safety valve; 35. Gas-liquid separator. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto:

[0039] Example 1: A high-temperature and high-pressure gas-containing hydraulic turbine experimental device, such as Figure 1 to Figure 5 As shown; it includes a liquid storage tank 1, a gas storage tank 10, a pressure regulating tank 18, a hot water heat pump unit 23 with a tube bundle heat exchanger 22, a hydraulic turbine 32 and a dynamometer 33.

[0040] The outlet of the liquid storage tank 1 is connected to the inlet of the liquid supply tank 5 through the first regulating valve 2 and the high-pressure pump 3 in sequence; that is, the liquid in the liquid storage tank 1 is pumped into the liquid supply tank 5 by the high-pressure pump 3; a first regulating valve 2 is provided on the pipeline between the outlet of the liquid storage tank 1 and the high-pressure pump 3.

[0041] The tank body of the liquid supply tank 5 is provided with an electric heating tube 4 and a first pressure gauge 6. The electric heating tube 4 is used to heat the liquid in the liquid supply tank 5, so that the liquid supply tank 5 can provide high-temperature liquid. A check valve 15 is provided at the inlet of the pressure stabilizing tank 18; the outlet of the liquid supply tank 5 is connected to the inlet of the pressure stabilizing tank 18 through the second regulating valve 8 and the check valve 15, a first temperature sensor 7 is provided on the pipeline between the outlet of the liquid supply tank 5 and the second regulating valve 8, and a high-temperature flow meter 9 is provided on the pipeline at the outlet of the second regulating valve 8.

[0042] The gas of this experimental device is provided by a gas tank 10, which is connected to the inlet of a pressure-stabilizing tank 18 through an air compressor 11, a needle valve 12, a ventilation nozzle 14, and a check valve 15 in sequence; the needle valve 12 can accurately control the gas flow; the diameter of the ventilation nozzle 14 is 2 mm; a gas flow meter 13 is provided on the connecting pipeline between the needle valve 12 and the ventilation nozzle 14.

[0043] The gas and liquid are mixed and enter the pressure-stabilizing tank 18 after passing through the check valve 15; the pressure-stabilizing tank 18 outputs the gas and liquid in the tank smoothly to maintain the system pressure; the pressure-stabilizing tank 18 is placed on a lifting platform 16 that can be adjusted up and down, so that the inlet pressure of the hydraulic turbine 32 can be effectively adjusted.

[0044] The pressure stabilizing tank 18 is provided with a second pressure gauge 17 , and the second pressure gauge 17 is used to display the pressure in the pressure stabilizing tank 18 .

[0045] The lower outlet of the pressure stabilizing tank 18 is connected to the drain tank 21 through a water seal gate valve 20 .

[0046] The upper outlet of the pressure stabilizing tank 18 is connected to the inlet of the expansion pipe 25 after passing through the third regulating valve 19 and the tube bundle heat exchanger 22 in sequence. A second temperature sensor 24 is provided on the connecting pipeline between the tube bundle heat exchanger 22 and the expansion pipe 25.

[0047] The expansion tube 25 is made of magnetically-friendly metal, and the function of the expansion tube 25 is to automatically adjust the pipeline pressure and maintain a stable pressure.

[0048] The hot water heat pump unit 23 has a heat preservation function for the medium flowing through the tube bundle heat exchanger 22 , thereby ensuring that the temperature of the medium discharged from the tube bundle heat exchanger 22 is substantially equal to the temperature in the liquid supply tank 5 .

[0049] The electromagnetic mixing device 26 is composed of a magnetic wheel 262 and a magnetic assembly 261 matched with the magnetic wheel 262; the magnetic assembly 261 is connected to an external power source; the magnetic wheel 262 is placed in the inner cavity of the expansion tube 25, the magnetic assembly 261 is sleeved on the periphery of the expansion tube 25, and the magnetic wheel 262 corresponds to the magnetic assembly 261 along the cross section of the expansion tube 25. When the magnetic assembly 261 is not powered, the magnetic wheel 262 is adsorbed on the inner wall of the expansion tube 25; when the magnetic assembly 261 is powered, the magnetic wheel 262 rotates around the axis of the expansion tube 25 in the expansion tube 25 under the action of magnetic force. Relying on the magnetic wheel 262, the medium flowing through the expansion tube 25 is evenly mixed (the bubble size is controlled to be uniform), so as to ensure that the gas-liquid two-phase entering the hydraulic turbine 32 is evenly mixed; by changing the electrical parameters of the magnetic component 261, the rotation speed and other movement indicators of the magnetic wheel 262 can be changed accordingly, and the gas content in the medium can be flexibly adjusted; thereby meeting the test requirements of different working conditions.

[0050] The outlet of the expansion tube 25 is connected to the inlet of the hydraulic turbine 32 through a pipeline, and a gas sensor 27, a third pressure gauge 28, and a damping pulsator 30 are installed on the pipeline in sequence. The gas sensor 27 monitors the gas content in the pipeline in real time; the function of the third pressure gauge 28 is to measure the pressure at the inlet of the hydraulic turbine 32. The purpose of controlling the inlet pressure of the hydraulic turbine 32 to remain unchanged can be achieved by adjusting the position of the lifting platform 16 at different operating points. The function of the damping pulsator 30 is to absorb or supplement the pressure in the discharge liquid to ensure the stability of the liquid flow rate.

[0051] The outlet of the expansion tube 25 and the inlet of the hydraulic turbine 32 are both arranged vertically, that is, the energy recovery section of the hydraulic turbine 32 is vertical, and the liquid in the expansion tube 25 enters the hydraulic turbine 32 vertically.

[0052] The camera head of the high-speed camera 29 faces the hydraulic turbine 32 , and the light source 31 faces the hydraulic turbine 32 .

[0053] The pump housing of the hydraulic turbine 32 adopts a square cavity structure made of organic glass, and the outer surfaces of the inlet pipe and the outlet pipe are made into squares to observe the internal flow details. With the light source 31, the high-speed camera 29 is used to shoot, that is, the internal shape of the impeller and the flow pattern evolution in the hydraulic turbine 32 are captured by the high-speed camera 29. The hydraulic turbine 32 is connected to the dynamometer 33; the hydraulic turbine 32 converts the pressure energy of the high-pressure gas-containing medium into mechanical energy, outputs it in the form of shaft power, and drives the dynamometer 33.

[0054] The outlet of the hydraulic turbine 32 is connected to the inlet of the gas-liquid separator 35 after passing through the safety valve 34. The gas outlet of the gas-liquid separator 35 is connected to the gas storage tank 10, and the liquid outlet of the gas-liquid separator 35 is connected to the liquid storage tank 1. The function of the safety valve 34 is that when the pressure at the outlet of the hydraulic turbine 32 is too large and exceeds the safety value, the safety valve 34 opens to discharge the excess gas-containing liquid in the hydraulic turbine 32. The gas-liquid separator 35 separates the gas and liquid in the outlet pipeline of the hydraulic turbine 32, and the gas enters the gas storage tank 10, and the liquid enters the liquid storage tank 1.

[0055] In the present invention,

[0056] The outside of the liquid storage tank 1, the liquid supply tank 5, the pressure stabilizing tank 18, the drain tank 21 and the pipelines through which the liquid and gas-liquid two-phase medium pass are all wrapped with an insulating layer of aluminum silicate fiber material to achieve thermal insulation; that is, in the entire pipeline system, except for the pipeline from the gas storage tank 10 to the ventilation nozzle 14 and the pipeline from the gas-liquid separator 35 to the gas storage tank 10, which are gas circulation pipelines, no insulating layer is set, other pipelines are provided with insulating layers.

[0057] In this way, the entire pipeline system, under the action of the heat exchanger and aluminum silicate fiber material, greatly reduces the phenomenon of high liquid heat loss in the pipeline, thereby ensuring that subsequent experiments can be carried out smoothly.

[0058] The high temperature and high pressure gas-containing turbine experimental device of the present invention has the following specific working process:

[0059] The liquid stored in the liquid storage tank 1 is water; the gas stored in the gas storage tank 10 is compressed air.

[0060] 1. Before starting, check the pipeline to confirm whether the hydraulic turbine 32 components are stuck and whether the test equipment is normal.

[0061] When abnormal noise is detected in the hydraulic turbine 32, it is determined that the hydraulic turbine 32 component is stuck. When water leakage is detected in the tank body (liquid storage tank 1, liquid supply tank 5, pressure regulating tank 18, liquid discharge tank 21) or pipeline, it is determined that the equipment is abnormal and needs to be repaired.

[0062] Otherwise, the following steps can be performed.

[0063] 2. Turn on the main power supply, set the temperature of the electric heating tube 4, turn on the high-pressure pump 3, circulate the pipeline water, and run the hydraulic turbine 32.

[0064] The details are as follows:

[0065] 2.1) The liquid in the liquid storage tank 1 is pumped into the liquid supply tank 5 by the action of the high-pressure pump 3 after passing through the first regulating valve 2. The first regulating valve 2 is used to adjust the flow rate of the liquid entering the liquid supply tank 5. When the device is working, the first regulating valve 2 is in an open state.

[0066] After the liquid is heated in the liquid supply tank 5, it is transmitted to the pressure-stabilizing tank 18. The high-temperature flowmeter 9 is used to detect the flow of the high-temperature liquid; the first temperature sensor 7 is used to detect the temperature of the high-temperature liquid. The second regulating valve 8 is used to adjust the outlet flow of the liquid supply tank 5 (that is, to adjust the inlet flow of the pressure-stabilizing tank 18). When the device is working, the second regulating valve 8 is in an open state.

[0067] 2.2) Compressed air is stored in the air storage tank 10, and is injected into the pressure-sustaining tank 18 through the ventilation nozzle 14 with a diameter of 2 mm under the action of the air compressor 11, that is, the high-temperature liquid in the liquid supply tank 5 and the compressed air in the air storage tank 10 are first combined, and then enter the pressure-sustaining tank 18 after passing through the check valve 15. The check valve 15 is linked with the third regulating valve 19 to stabilize the gas-liquid mixture in the pressure-sustaining tank 18. When the device is working, the third regulating valve 19 is in an open state.

[0068] The flow of the gas is precisely controlled by a needle valve 12 , and a gas flow meter 13 is used to monitor the gas flow.

[0069] 2.3) The gas-liquid mixture discharged from the pressure stabilizing tank 18 passes through the third regulating valve 19 and enters the tube bundle heat exchanger 22;

[0070] When the pressure in the pressure-stabilizing tank 18 exceeds the set pressure of the water-sealing gate valve 20 , the water-sealing gate valve 20 is opened, and the gas-liquid mixture in the pressure-stabilizing tank 18 is discharged into the drain tank 21 , thereby achieving the purpose of pressure relief.

[0071] 2.4) The gas-liquid mixture discharged from the tube bundle heat exchanger 22 passes through the second temperature sensor 24 and enters the expansion tube 25; the second temperature sensor 24 is used to determine whether the temperature of the gas-liquid mixture discharged from the tube bundle heat exchanger 22 meets the test design temperature condition.

[0072] When the magnetic assembly 261 is powered on, the magnetic assembly 261 drives the magnetic wheel 262 to rotate around the axis of the expansion tube 25, thereby achieving the purpose of gas-liquid mixing. The advantage of using the magnetic wheel 262 is that the rotation speed of the magnetic wheel 262 can be adjusted by changing the electrical parameters of the magnetic assembly 261. The higher the rotation speed of the magnetic wheel 262, the smaller the bubbles generated will be, which is more conducive to the mixing of gas and liquid, that is, the gas content can be flexibly adjusted; thereby meeting the test requirements of different working conditions.

[0073] Compared with other stirring devices, the electromagnetic mixing device 26 of the present invention has a more compact structure, reduces the volume of the device, and performs gas-liquid fusion during the flow of liquid, thereby reducing the time of gas-liquid fusion and improving the efficiency of gas-liquid fusion. The non-contact gas-liquid mixing method also avoids changes in pipeline pressure caused by leakage.

[0074] 2.5) The gas-liquid mixture discharged from the outlet of the expansion tube 25 passes through the gas sensor 27, the third pressure gauge 28, and the damping pulsator 30 in sequence and then enters the hydraulic turbine 32;

[0075] The gas sensor 27 is used to detect the gas content in the medium in the pipeline, and the third pressure gauge 28 is used to detect the pressure of the medium in the pipeline.

[0076] In order to ensure the smooth flow of the transported liquid, a pulsation damper 30 is installed before the inlet of the hydraulic turbine 32. The pulsation damper 30 absorbs or supplements the pressure in the discharge liquid to ensure the stability of the liquid flow rate.

[0077] 2.6) When the pressure at the outlet of the hydraulic turbine 32 is too high and exceeds the safety value, the safety valve 34 is activated to discharge the excess high-temperature gas-containing liquid in the hydraulic turbine 32. The discharged high-temperature gas-containing liquid is separated in the gas-liquid separator 35, and the separated liquid enters the liquid storage tank 1, and the gas enters the gas storage tank 10.

[0078] The high-pressure gas-containing medium passes through the hydraulic turbine 32 and converts its pressure energy into mechanical energy, which is output in the form of shaft power to drive the dynamometer.

[0079] Note: At the start of operation, the above step 2.2) is not running, that is, the air compressor 11 is not working; only the pipeline water is circulated to preheat the pipeline so that the hydraulic turbine 32 can run; when the gas-liquid separator 35 is running, the air compressor 11 is turned on and the above step 2.2) is performed.

[0080] When studying the work mechanism of high-pressure gas, the flow rate is kept unchanged, the gas sensor 27 is observed, and the electrical parameters of the magnetic component 261 are adjusted to change the gas content of the liquid, thereby meeting the test requirements of different working conditions.

[0081] After the experiment begins, the internal shape of the impeller and the flow pattern evolution of the hydraulic turbine 32 are photographed by a high-speed camera 29. After the experiment ends, the high-pressure pump 3 and the air compressor 11 are turned off. At the same time, the first regulating valve 2, the needle valve 12, and the hot water heat pump unit 23 with the tubular heat exchanger 22 are also turned off.

[0082] 3. The height of the lifting platform 16 is adjustable to facilitate control of the inlet pressure of the hydraulic turbine 32. The outlet of the pressure stabilizing tank 18 is connected to the expansion pipe 25 to achieve the purpose of stabilizing the system pressure.

[0083] Finally, it should be noted that the above examples are only some specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A high temperature and high pressure gas turbine experimental device, comprising a dynamometer (33) connected to a hydraulic turbine (32), characterized in that: It also includes a liquid storage tank (1), a liquid supply tank (5) with an electric heating tube (4), a pressure stabilizing tank (18), a gas storage tank (10), a hot water heat pump unit (23) with a tube bundle heat exchanger (22), an expansion tube (25) made of magnetically friendly metal, and an electromagnetic mixing device (26); the pressure stabilizing tank (18) is placed on a lifting platform (16) that can be adjusted up and down; The outlet of the liquid storage tank (1) is connected to the inlet of the liquid supply tank (5) through the first regulating valve (2) and the high-pressure pump (3) in sequence; A check valve (15) is provided at the inlet of the pressure stabilizing tank (18); the outlet of the liquid supply tank (5) is connected to the check valve (15) through a second regulating valve (8); and the air storage tank (10) is connected to the check valve (15) through an air compressor (11), a needle valve (12), and a ventilation nozzle (14) in sequence; The lower outlet of the pressure stabilizing tank (18) is connected to the drain tank (21) through a water seal gate valve (20), and the upper outlet of the pressure stabilizing tank (18) is connected to the inlet of the expansion tube (25) through a third regulating valve (19) and a tube bundle heat exchanger (22) in sequence; The electromagnetic mixing device (26) is composed of a magnetic wheel (262) and a magnetic assembly (261) matched with the magnetic wheel (262), and the magnetic assembly (261) is externally connected to a power source; the magnetic wheel (262) is placed in the inner cavity of the expansion tube (25), and the magnetic assembly (261) is sleeved on the periphery of the expansion tube (25); The outlet of the expansion tube (25) is connected to the inlet of the hydraulic turbine (32) through the damping pulsator (30), the outlet of the hydraulic turbine (32) is connected to the inlet of the gas-liquid separator (35) through the safety valve (34), the gas outlet of the gas-liquid separator (35) is connected to the gas storage tank (10), and the liquid outlet of the gas-liquid separator (35) is connected to the liquid storage tank (1).

2. The high temperature and high pressure gas turbine experimental device according to claim 1 is characterized in that: The high-temperature and high-pressure gas-containing turbine experimental device also includes a high-speed camera (29) and a light source (31); the camera head of the high-speed camera (29) faces the hydraulic turbine (32), and the light source (31) faces the hydraulic turbine (32).

3. The high temperature and high pressure gas-containing turbine experimental device according to claim 1 or 2, characterized in that: A first pressure gauge (6) is provided on the liquid supply tank (5), and a second pressure gauge (17) is provided on the pressure stabilizing tank (18); A first temperature sensor (7) is provided on the pipeline between the outlet of the liquid supply tank (5) and the second regulating valve (8), and a high-temperature flow meter (9) is provided on the pipeline at the outlet of the second regulating valve (8); A gas flow meter (13) is provided on the pipeline between the needle valve (12) and the ventilation nozzle (14); A second temperature sensor (24) is provided on the pipeline between the tube bundle heat exchanger (22) and the expansion tube (25); A gas sensor (27) and a third pressure gauge (28) are provided on the pipeline between the outlet of the expansion tube (25) and the damping pulsator (30).

4. The high temperature and high pressure gas turbine experimental device according to claim 3 is characterized by: The outer surfaces of the liquid storage tank (1), the liquid supply tank (5) and the pressure stabilizing tank (18) are provided with a heat insulation layer. Except for the pipeline for gas circulation, the outer surfaces of the remaining pipelines are also provided with a heat insulation layer; The gas circulation pipelines are the pipeline from the gas storage tank (10) to the ventilation nozzle (14) and the pipeline from the gas-liquid separator (35) to the gas storage tank (10).

5. The high temperature and high pressure gas turbine experimental device according to claim 4 is characterized in that: The shell of the hydraulic turbine (32) is a square cavity made of transparent material, and the inlet of the hydraulic turbine (32) and the outlet of the hydraulic turbine (32) are both square tubes.

6. The high temperature and high pressure gas-containing turbine experimental device according to claim 5 is characterized in that: The outlet of the expansion pipe (25) and the inlet of the hydraulic turbine (32) are both arranged vertically.

7. The high temperature and high pressure gas-containing turbine experimental device according to claim 6 is characterized in that: The diameter of the ventilation nozzle (14) is 2 mm.

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