GB2599197A - Testing and detection device and testing method for seawater desalination pump and energy recovery integrated machine - Google Patents

Testing and detection device and testing method for seawater desalination pump and energy recovery integrated machine Download PDF

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Publication number
GB2599197A
GB2599197A GB2108411.6A GB202108411A GB2599197A GB 2599197 A GB2599197 A GB 2599197A GB 202108411 A GB202108411 A GB 202108411A GB 2599197 A GB2599197 A GB 2599197A
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Prior art keywords
pump
pressure sensor
regulating valve
flow regulating
pressure
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GB2108411.6A
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GB2599197B (en
GB202108411D0 (en
Inventor
Yang Fei
Zhang Desheng
Zhao Ruijie
Qi Bing
Shi Weidong
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Jiangsu University
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Jiangsu University
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Priority claimed from CN202010301161.XA external-priority patent/CN111551377B/en
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Publication of GB2599197A publication Critical patent/GB2599197A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/005—Valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/10—Energy recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/08—Cylinder or housing parameters
    • F04B2201/0802—Vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1201—Rotational speed of the axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/01—Pressure before the pump inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

Disclosed are a testing and detection device and testing method for a seawater desalination pump and energy recovery integrated machine. The device comprises a turbine (12) and a high-pressure pump (7), wherein the input end of the high-pressure pump (7) is connected to the output end of a multi-stage pump (3) by means of a pipe; a first pressure sensor (6), a first flow regulating valve (5) and a second pressure sensor (4) are mounted on the pipe between the high-pressure pump (7) and the multi-stage pump (3); a third pressure sensor (2) is mounted on an input end pipe of the multi-stage pump (3); a sixth pressure sensor (8) and a second flow regulating valve (9) are mounted on a first output pipe (7-1) of the high-pressure pump (7); a third flow regulating valve (16) and a first flowmeter (17) are mounted on a second output pipe (7-2); a fourth flow regulating valve (10) and a fourth pressure sensor (11) are mounted on a third output pipe (7-3); an output end pipe of the turbine (12) is in communication with a first water tank (19); and a fifth pressure sensor (13) and a second flowmeter (14) are mounted on an output end pipe of the turbine (12). During testing, data of instruments is recorded and calculated to obtain desired data, thereby achieving accurate evaluation of the working performance of a seawater desalination pump and energy recovery integrated machine.

Description

TEST DETECTION DEVICE AND TEST METHOD FOR ENERGY
RECOVERY INTEGRATED MACHINE OF SEAWATER DESALINATION
PUMP
Technical Field
100011 The present invention relates to a test detection device and a test method for an energy recovery integrated machine of a seawater desalination pump, and belongs to the technical field of test devices for an energy recovery integrated machine of a seawater desalination pump.
Background
100021 An energy recovery integrated machine of a seawater desalination pump is composed of a single-stage energy recovery turbine and a single-stage high-pressure booster pump. In a practical engineering application, a single-stage high-pressure pump in an integrated machine is connected in series to a multistage pump for use, and a water supply system with the multistage pump provides necessary water supply pressure and flow for the single-stage high-pressure pump. In general, the multistage pump has a flow identical to that of the high-pressure pump in the integrated machine, and a pressure about twice that of the high-pressure single-stage pump. A sum of the pressure of the multistage pump and the pressure of the high-pressure single-stage pump is an operating pressure of reverse osmosis in an actual engineering, for providing reverse osmosis power for membrane seawater desalination. Generally, an operating pressure is 6.0 MPa, that is, a series head is 600 m. Clean raw seawater after treatment passes through the high-pressure pump and then is subjected to a reverse osmosis treatment with a membrane stack to generate 40% fresh water and 60% concentrated seawater. The 60% concentrated seawater has a pressure of 6.0 MPa, and this pressure can be used as a power source of the turbine in the integrated machine to recover energy through the turbine in the integrated machine.
100031 Because of the compact structure of the energy recovery integrated machine of the seawater desalination pump, and changeable and complicated operation working conditions, by simulating operating processes of the energy recovery integrated machine of the seawater desalination pump under various working conditions, operating parameters such as pressure and flow in various pipelines of the integrated machine under various working conditions are monitored and collected, which is of great significance for researchers to solve technical problems such as stability, vibration, and noise of the integrated machine in the actual working process.
Summary
100041 An objective of the present invention is to provide a test detection device and test method for an energy recovery integrated machine of a seawater desalination pump, which can simulate operating processes of the energy recovery integrated machine of the seawater desalination pump under various working conditions, and realize monitoring of operating parameters such as pressure and flow in various pipelines 100051 In order to realize the above objective of the present invention, the following technical solution is adopted by the present invention. A test detection device for an energy recovery integrated machine of a seawater desalination pump, including a turbine and a high-pressure pump, the turbine and the high-pressure pump being installed on a same rotating shaft, and the rotating shaft being installed in a machine casing, wherein an input end of the high-pressure pump is connected to an output end of a multistage pump through a pipe, and the pipe between the high-pressure pump and the multistage pump is provided with a first pressure sensor, a first flow regulating valve, and a second pressure sensor; an input end pipe of the multistage pump is provided with a third pressure sensor; an output end pipe of the high-pressure pump includes a first output pipe, the first output pipe is provided with two branch pipes, i.e., a second output pipe and a third output pipe, the second output pipe is in communication with a first pool, the third output pipe is connected to an input end of the turbine, the first output pipe is provided with a sixth pressure sensor and a second flow regulating valve, the second output pipe is provided with a third flow regulating valve and a first flowmeter, and the third output pipe is provided with a fourth flow regulating valve and a fourth pressure sensor; and an output end pipe of the turbine is in communication with the first pool, and the output end pipe of the turbine is provided with a fifth pressure sensor and a second flowmeter.
100061 In the above solution, the second output pipe is provided with a first back pressure valve, and the first flowmeter is located between the first back pressure valve and the third flow regulating valve; and the output end pipe of the turbine is provided with a second back pressure valve, and the second flowmeter is located between the second back pressure valve and the fifth pressure sensor.
100071 In the above solution, the first flow regulating valve is located between the first pressure sensor and the second pressure sensor; the fourth pressure sensor is located between the fourth flow regulating valve and the turbine; and the second flow regulating valve is located between the sixth pressure sensor and the second output pipe.
100081 In the above solution, the rotating shaft of the turbine and the high-pressure pump is provided with a water film bearing, an outer wall surface of the machine casing is provided with a vibration sensor, and the vibration sensor is located at the water film bearing.
100091 In the above solution, the input end pipe of the multistage pump is in communication with a second pool.
100101 The present invention also provides a test method using the test detection device for the energy recovery integrated machine of the seawater desalination pump, including the following steps: S1: preparation before starting a test: checking tightness of pipeline joints, filling the second pool with sufficient water, adjusting the first flow regulating valve to a slight opening state, adjusting the second flow regulating valve to a full opening state, adjusting the third flow regulating valve to a full opening state, adjusting the fourth flow regulating valve to a full opening state, adjusting the first back pressure valve to a full opening state, and adjusting the second back pressure valve to a full opening state; 52: start of the multistage pump: starting a power supply of the multistage pump, as a rotational speed of the multistage pump increases gradually, a liquid flow in the pipe of the multistage pump increasing gradually, and gradually opening the first flow regulating valve so that when the multistage pump reaches half of a rated flow of the multistage pump, the first flow regulating valve is adjusted to a full opening; 53: record of test data: after the multistage pump operates stably, adjusting the first flow regulating valve so that a pressure of a system meets requirements of test conditions; keeping the second flow regulating valve in the full opening state, adjusting the third flow regulating valve and the fourth flow regulating valve so that the pressure of the system measured by the sixth pressure sensor meets test requirements, and recording test data from the second flowmeter, the first flowmeter, the first pressure sensor, the second pressure sensor, the third pressure sensor, the fourth pressure sensor, the fifth pressure sensor, the sixth pressure sensor, and the vibration sensor; and 54: measurement and calculation of test results: a flow of the multistage pump being a sum of a reading of the second flowmeter and a reading of the first flowmeter, and a head of the multistage pump being obtained by converting a reading of the third pressure sensor and a reading of the second pressure sensor; a flow of the high-pressure pump being equal to the flow of the multistage pump, and a head of the high-pressure pump being obtained by converting a reading of the first pressure sensor and a reading of the sixth pressure sensor; a flow of the turbine being the reading of the second flowmeter, and an output power of the turbine being obtained by converting a reading of the fourth pressure sensor and a reading of the fifth pressure sensor; and a rotational speed of the rotating shaft of the turbine and the high-pressure pump being obtained by converting a vibration spectrum measured by the vibration sensor.
[00111 In the above solution, by adjusting the first flow regulating valve, the third flow regulating valve, and the fourth flow regulating valve, the measurement and calculation of the corresponding test results with simulating different working conditions are realized.
100121 The present invention has the following beneficial effects: (1) The test detection device of the present invention is unified with an actual engineering operation of the energy recovery integrated machine of the seawater desalination pump. By measuring accurate flow and head data of the multistage pump and high-pressure pump, the flow and output power data of the turbine, and the rotational speed data of the rotating shaft, an accurate evaluation basis is provided for a recovery efficiency of the energy recovery integrated machine for seawater desalination under an operation condition with a high water pressure and a high rotational speed. (2) The present invention solves the limitation of a conventional test bench in the test of the energy recovery integrated machine of the seawater desalination pump. By setting various flow regulating valves, the test detection device can perform tests under various working conditions.
(3) By changing the positions of the flowmeters and installing the back pressure valves, the flow of the test system can be measured more accurately, and by improving pipeline tightness and valve control, the start of a multistage centrifugal pump is made more convenient.
Brief Description of the Drawings
100131 FIG. 1 is a schematic diagram of a test device for an energy recovery integrated machine of a seawater desalination pump.
In the drawing, 1. Second pool, 2. Third pressure sensor, 3. Multistage pump, 4. Second pressure sensor, 5. First flow regulating valve, 6. First pressure sensor, 7. High-pressure pump, 7-1. First output pipe, 7-2. Second output pipe, 7-3. Third output pipe, 8. Sixth pressure sensor, 9. Second flow regulating valve, 10. Fourth flow regulating valve, 11. Fourth pressure sensor, 12. Turbine, 13. Fifth pressure sensor, 14. Second flowmeter, 15. Second back pressure valve, 16. Third flow regulating valve, 17. First flowmeter, 18. First back pressure valve, 19. First pool, 20. Machine casing, 21. Vibration sensor.
Detailed Description of the Embodiments
100141 The present invention is further described in detail with reference to the accompanying drawing and specific embodiments below.
100151 As shown in FIG.1, the present embodiment provides a test detection device for an energy recovery integrated machine of a seawater desalination pump, including a turbine 12 and a high-pressure pump 7. The turbine 12 and the high-pressure pump 7 are installed on the same rotating shaft. The rotating shaft is installed in a machine casing 20. An input end of the high-pressure pump 7 is connected to an output end of a multistage pump 3 through a pipe. An input end pipe of the multistage pump 3 is in communication with a second pool 1. The pipe between the high-pressure pump 7 and the multistage pump 3 is provided with a first pressure sensor 6, a first flow regulating valve 5, and a second pressure sensor 4. The first flow regulating valve 5 is located between the first pressure sensor 6 and the second pressure sensor 4. The input end pipe of the multistage pump 3 is provided with a third pressure sensor 2. An output end pipe of the high-pressure pump 7 includes a first output pipe 7-1. The first output pipe 7-1 is provided with two branch pipes, i.e., a second output pipe 7-2 and a third output pipe 7-3. The second output pipe 7-2 is in communication with a first pool 19. The third output pipe 7-3 is connected to an input end of the turbine 12. The first output pipe 7-1 is provided with a sixth pressure sensor 8 and a second flow regulating valve 9. The second flow regulating valve 9 is located between the sixth pressure sensor 8 and the second output pipe 7-2 (the second output pipe 7-2 and the third output pipe 7-3 are connected in parallel, and therefore it can also be said that the second flow regulating valve 9 is located between the sixth pressure sensor 8 and the third output pipe 7-3). The second output pipe 7-2 is provided with a third flow regulating valve 16 and a first flowmeter 17. The third output pipe 7-3 is provided with a fourth flow regulating valve 10 and a fourth pressure sensor 11. The fourth pressure sensor 11 is located between the fourth flow regulating valve 10 and the turbine 12. An output end pipe of the turbine 12 is in communication with the first pool 19. The output end pipe of the turbine 12 is provided with a fifth pressure sensor 13 and a second flowmeter 14.
100161 Because the flow and pressure in a pipeline system may fluctuate at any time, and if the flowmeter is not filled with liquid, the accuracy of data measured by the flowmeter will be affected, resulting in a deviation of data measured by the flowmeter, and affecting experimental data collection and analysis of experimental results. In this embodiment, based on the above considerations, the second output pipe 7-2 is provided with a first back pressure valve 18, and the first flowmeter 17 is located between the first back pressure valve 18 and the third flow regulating valve 16. An output end pipe of the turbine 12 is provided with a second back pressure valve 15, and the second flowmeter 14 is located between the second back pressure valve 15 and the fifth pressure sensor 13. Moreover, the flowmeters are throttle flowmeters. When a fluid flows through the throttle flowmeter, a flow bundle forms a local contraction; as a result, a flow rate is increased and a static pressure is reduced, thus causing a pressure difference in front of and behind the device. At the same time, the back pressure valve is installed at the outlet of each flowmeter to ensure the accuracy of collected data.
100171 In order to better measure and calculate the rotational speed of the rotating shaft, the rotating shaft where the turbine 12 and the high-pressure pump 7 are located is provided with a water film bearing in this embodiment. An outer wall surface of the machine casing 20 is provided with a vibration sensor 21, and the vibration sensor 21 is just located at the water film bearing. In this way, the rotational speed of the rotating shaft can be deduced from a vibration frequency of the bearing, thus achieving the measurement of the rotational speed of the rotating shaft. In this method, a measuring device is arranged at a housing of the integrated machine; rather than inside the integrated machine, thus avoiding interferences to a flow channel design.
100181 This embodiment provides a test method of the test detection device for an energy recovery integrated machine of a seawater desalination pump, including the follows steps: Sl: preparation before starting the test: checking tightness of pipeline joints, filling the pool 1 with sufficient water, adjusting the first flow regulating valve 5 to a slight opening state, adjusting the second flow regulating valve 9 to a full opening state, adjusting the third flow regulating valve 16 to a full opening state, adjusting the fourth flow regulating valve 10 to a full opening state, adjusting the first back pressure valve 18 to a full opening state, and adjusting the second back pressure valve 15 to a full opening state; S2: start of the multistage pump: starting a power supply of the multistage pump 3, as a rotational speed of the multistage pump increases gradually, a liquid flow in the pipe of the multistage pump 3 increasing gradually, and gradually opening the first flow regulating valve 5 so that when the multistage pump 3 reaches half of its rated flow, the first flow regulating valve 5 is adjusted to a full opening state; S3: record of test data: after the multistage pump operates stably, adjusting the first flow regulating valve 5 so that a pressure of a system meets requirements of test conditions; keeping the second flow regulating valve 9 in the full opening state, adjusting the third flow regulating valve 16 and the fourth flow regulating valve 10 so that the system pressure measured by the sixth pressure sensor 8 meets test requirements, and recording test data of the second flowmeter 14, the first flowmeter 17, the first pressure sensor 6, the second pressure sensor 4, the third pressure sensor 2, the fourth pressure sensor 11, the fifth pressure sensor 13, the sixth pressure sensor 8, and the vibration sensor 21; and S4: measurement and calculation of test results: the flow of the multistage pump 3 being a sum of readings of the second flowmeter 14 and the first flowmeter 17, and a head thereof being obtained by converting readings of the third pressure sensor 2 and the second pressure sensor 4; a flow of the high-pressure pump 7 being equal to the flow of the multistage pump 3, and a head thereof being obtained by converting readings of the first pressure sensor 6 and the sixth pressure sensor 8; a flow of the turbine 12 being the reading of the second flowmeter 14, and an output power thereof being obtained by converting readings of the fourth pressure sensor 11 and the fifth pressure sensor 13; and a rotational speed of the rotating shaft of the turbine 12 and the high-pressure pump 7 being obtained by converting a vibration spectrum measured by the vibration sensor 21.
100191 In addition, in this embodiment, by adjusting the first flow regulating valve 5, the third flow regulating valve (16), and the fourth flow regulating valve 10, the measurement and calculation of the corresponding test results with simulating different working conditions can also be realized.

Claims (7)

  1. Claims What is claimed is: 1. A test detection device for an energy recovery integrated machine of a seawater desalination pump, comprising a turbine (12) and a high-pressure pump (7), the turbine (12) and the high-pressure pump (7) being installed on a same rotating shaft, and the rotating shaft being installed in a machine casing (20), characterized in that an input end of the high-pressure pump (7) is connected to an output end of a multistage pump (3) through a pipe, and the pipe between the high-pressure pump (7) and the multistage pump (3) is provided with a first pressure sensor (6), a first flow regulating valve (5), and a second pressure sensor (4); an input end pipe of the multistage pump (3) is provided with a third pressure sensor (2); an output end pipe of the high-pressure pump (7) comprises a first output pipe (7-1), the first output pipe (7-1) is provided with two branch pipes, i.e., a second output pipe (7-2) and a third output pipe (7-3), the second output pipe (7-2) is in communication with a first pool (19), the third output pipe (7-3) is connected to an input end of the turbine (12), the first output pipe (7-1) is provided with a sixth pressure sensor (8) and a second flow regulating valve (9), the second output pipe (7-2) is provided with a third flow regulating valve (16) and a first flowmeter (17), and the third output pipe (7-3) is provided with a fourth flow regulating valve (10) and a fourth pressure sensor (11); and an output end pipe of the turbine (12) is in communication with the first pool (19), and the output end pipe of the turbine (12) is provided with a fifth pressure sensor (13) and a second flowmeter (14).
  2. 2. The test detection device for the energy recovery integrated machine of the seawater desalination pump according to claim 1, characterized in that the second output pipe (7-2) is provided with a first back pressure valve (18), and the first flowmeter (17) is located between the first back pressure valve (18) and the third flow regulating valve (16); and the output end pipe of the turbine (12) is provided with a second back pressure valve (15), and the second flowmeter (14) is located between the second back pressure valve (15) and the fifth pressure sensor (13).
  3. 3. The test detection device for the energy recovery integrated machine of the seawater desalination pump according to claim 1, characterized in that the first flow regulating valve (5) is located between the first pressure sensor (6) and the second pressure sensor (4); the fourth pressure sensor (11) is located between the fourth flow regulating valve (10) and the turbine (12); and the second flow regulating valve (9) is located between the sixth pressure sensor (8) and the second output pipe (7-2).
  4. 4. The test detection device for the energy recovery integrated machine of the seawater desalination pump according to claim 2, characterized in that the rotating shaft of the turbine (12) and the high-pressure pump (7) is provided with a water film bearing, an outer wall surface of the machine casing (20) is provided with a vibration sensor (21), and the vibration sensor (21) is located at the water film bearing.
  5. 5. The test detection device for the energy recovery integrated machine of the seawater desalination pump according to claim 4, characterized in that the input end pipe of the multistage pump (3) is in communication with a second pool (1).
  6. 6. A test method using the test detection device for the energy recovery integrated machine of the seawater desalination pump of claim 5, characterized by comprising the following steps: Si: preparation before starting a test: checking tightness of pipeline joints, filling the second pool (1) with sufficient water, adjusting the first flow regulating valve (5) to a slight opening state, adjusting the second flow regulating valve (9) to a full opening state, adjusting the third flow regulating valve (16) to a full opening state, adjusting the fourth flow regulating valve (10) to a full opening state, adjusting the first back pressure valve (18) to a full opening state, and adjusting the second back pressure valve (15) to a full opening state; S2: start of the multistage pump: starting a power supply of the multistage pump (3), as a rotational speed of the multistage pump increases gradually, a liquid flow in the pipe of the multistage pump (3) increasing gradually, and gradually opening the first flow regulating valve (5) so that when the multistage pump (3) reaches half of a rated flow of the multistage pump (3), the first flow regulating valve (5) is adjusted to a full opening; 53: record of test data: after the multistage pump operates stably, adjusting the first flow regulating valve (5) so that a pressure of a system meets requirements of test conditions; keeping the second flow regulating valve (9) in the full opening state, adjusting the third flow regulating valve (16) and the fourth flow regulating valve (10) so that the pressure of the system measured by the sixth pressure sensor (8) meets test requirements, and recording test data from the second flowmeter (14), the first flowmeter (17), the first pressure sensor (6), the second pressure sensor (4), the third pressure sensor (2), the fourth pressure sensor (11), the fifth pressure sensor (13), the sixth pressure sensor (8), and the vibration sensor (21); and 54: measurement and calculation of test results: a flow of the multistage pump (3) being a sum of a reading of the second flowmeter (14) and a reading of the first flowmeter (17), and a head of the multistage pump (3) being obtained by converting a reading of the third pressure sensor (2) and a reading of the second pressure sensor (4); a flow of the high-pressure pump (7) being equal to the flow of the multistage pump (3), and a head of the high-pressure pump (7) being obtained by converting a reading of the first pressure sensor (6) and a reading of the sixth pressure sensor (8); a flow of the turbine (12) being the reading of the second flowmeter (14), and an output power of the turbine (12) being obtained by converting a reading of the fourth pressure sensor (11) and a reading of the fifth pressure sensor (13); and a rotational speed of the rotating shaft of the turbine (12) and the high-pressure pump (7) being obtained by converting a vibration spectrum measured by the vibration sensor (21).
  7. 7. The test method using the test detection device for the energy recovery integrated machine of the seawater desalination pump of claim 5 according to claim 6, characterized in that by adjusting the first flow regulating valve (5), the third flow regulating valve (16), and the fourth flow regulating valve (10), the measurement and calculation of the corresponding test results with simulating different working conditions are realized.
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JPS58172532A (en) * 1982-04-05 1983-10-11 Awano Seiichi Apparatus for testing load of energy recovery type rotary machine
CN102507245A (en) * 2011-11-02 2012-06-20 中冶连铸技术工程股份有限公司 Test device for testing energy recovery device
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