High-temperature and high-pressure regulating valve test platform and method under power station system

Abstract

The invention provides a high-temperature and high-pressure regulating valve test platform and method under a power station system, the high-temperature and high-pressure regulating valve test platform comprises a steam inlet pipe section, a test pipe section and a processor, the steam inlet pipe section comprises a steam inlet pipeline, one end of the steam inlet pipeline is connected with a main steam pipeline of an ultra-supercritical generator set, and the other end of the steam inlet pipeline is connected with the test pipe section; the testing pipe section comprises a temperature and pressure reducing device, a regulating valve testing section and a pressure balancing section, an inlet of the temperature and pressure reducing device is connected with a boiler temperature reducing water system of the ultra-supercritical generator set through a temperature reducing water section, an outlet of the temperature and pressure reducing device is connected with the regulating valve testing section and the pressure balancing section, and the regulating valve testing section is provided with a tested regulating valve; the pressure balance section is provided with a bypass valve; a pressure transmitter, a temperature transmitter and a differential pressure transmitter are arranged between the temperature and pressure reduction device and the adjusting valve test section, and all the transmitters are connected with the processor. According to the invention, the inspection capability of the steam regulating valve is improved, and various performances of the regulating valve can be accurately detected.

Description

Technical Field

[0001] The present invention belongs to the technical field of regulating valve testing, and particularly relates to a high-temperature and high-pressure regulating valve test platform and method under a power station system. Background Art

[0002] The statements in this part merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, with the development of technology, many industries require regulating valves with larger diameters, higher parameters, and higher flow rates (such as above 300 t / h) to meet the usage requirements of the system, and a relevant test platform is also needed for full-performance testing.

[0004] However, most of the existing steam regulating valve test platforms currently accumulate steam through an energy storage tank method and can only ensure short-term testing of steam pressure; some test benches supply steam through a small electric boiler and cannot ensure continuous full-flow testing of large-diameter valves.

[0005] If a test bench system is built separately according to high parameters and large flow rates, the cost investment in boilers and supporting auxiliary equipment will be very high.

[0006] There are also some documents in the prior art that attempt to solve the above problems. For example, a Chinese invention patent with the application publication number CN 113418695A and the invention name of an ultra-supercritical safety valve test platform under actual working conditions provides an ultra-supercritical safety valve test platform under reagent working conditions, which is directly connected to the main steam pipeline of a generator set for safety valve experiments. However, it only obtains pressure parameters in testing, cannot simulate working conditions such as boiler desuperheating, and cannot achieve refined control to accurately detect the various performances of the regulating valve.

[0007] In summary, there is an urgent need to combine the existing power station system to form a test bench for comprehensive power station utilization to solve this problem. Summary of the Invention

[0008] In order to solve the above problems, the present invention proposes a high-temperature and high-pressure regulating valve test platform and method under a power station system. The present invention improves the inspection ability of the steam regulating valve and can accurately detect the various performances of the regulating valve.

[0009] According to some embodiments, the present invention adopts the following technical solutions:

[0010] A high-temperature and high-pressure regulating valve test platform under a power station system is mounted on the power station system and includes an inlet steam pipe section, a test pipe section, and a processor. Among them, the inlet steam pipe section includes an inlet steam pipeline, one end of the inlet steam pipeline is connected to the main steam pipeline of an ultra-supercritical generator set, and the other end is connected to the test pipe section;

[0011] The test pipe section includes a desuperheating and pressure reducing device, a regulating valve test section, and a pressure balancing section. The inlet of the desuperheating and pressure reducing device is connected to the boiler desuperheating water system of the ultra-supercritical generating unit through a desuperheating water section. The outlet, the regulating valve test section, and the pressure balancing section are connected. The regulating valve test section and the pressure balancing section are in parallel. The regulating valve test section is provided with a regulating valve to be tested, and the pressure balancing section is provided with a bypass valve;

[0012] The ends of the regulating valve test section and the pressure balancing section are connected to a silencer and discharged;

[0013] A pressure transmitter, a temperature transmitter, and a differential pressure transmitter are arranged between the desuperheating and pressure reducing device and the regulating valve test section. A pressure transmitter is arranged in front of the regulating valve to be tested, and a pressure transmitter and a temperature transmitter are arranged behind the regulating valve to be tested;

[0014] Each transmitter is connected to a processor. The processor is used to control the actions of each valve and determine the performance of the regulating valve to be tested according to the data of the corresponding transmitter.

[0015] As an alternative implementation, two groups of steam inlet electric gate valves are arranged on the steam inlet pipe to isolate the main steam pipe and the test pipe section.

[0016] As an alternative implementation, the desuperheating and pressure reducing device is a desuperheater and pressure reducer, and the steam inlet of the desuperheater and pressure reducer is connected to the steam inlet pipe.

[0017] As an alternative implementation, a boiler desuperheating water electric gate valve, a first boiler desuperheating water gate valve, a boiler desuperheating water electric regulating valve, and a second boiler desuperheating water gate valve are sequentially arranged on the desuperheating water section. The boiler desuperheating water electric regulating valve is used to adjust the desuperheating water flow, and the boiler desuperheating water electric gate valve, the first boiler desuperheating water gate valve, and the second boiler desuperheating water gate valve are used to isolate the desuperheating water.

[0018] As an alternative implementation, a viscous damper is arranged in front of the desuperheating and pressure reducing device, and a flow measuring device is arranged behind the desuperheating and pressure reducing device to measure the overall steam flow of the test pipe section. The flow measuring device is connected to the processor.

[0019] As a further alternative, a viscous damper is arranged between the flow measuring device and the test pipe section.

[0020] As an alternative implementation, a pressure transmitter is arranged in front of the bypass valve.

[0021] As an alternative implementation, two series-connected warm-up bypass valves are connected in parallel with the regulating valve to be tested.

[0022] As an alternative embodiment, a plurality of air release valves are provided at the high points of the test pipe section, and a plurality of steam traps or drain valves are provided at the low points or / and in front of the valves.

[0023] The test method based on the above platform includes the following steps:

[0024] Fill the desuperheating water pipeline with water, open all the valves in the desuperheating water section, connect the steam inlet pipe section and the main steam pipeline, open all the air release valves, drain valves and steam traps of the system, open the bypass valve, and perform water drainage, air release and pipe warming operations;

[0025] Control the change rate of the boiler temperature not to exceed the set value and the pressure drop rate not to exceed the predetermined value by adjusting the fuel quantity, boiler air distribution, boiler combustion, feed water flow rate and the opening degree of the high and low bypass valves;

[0026] After discharging the air in the desuperheating water pipeline, close the air release valves in the desuperheating water section, close the electric regulating valve of the boiler desuperheating water, warm the steam inlet pipe section, and when the temperature behind the valve reaches the set value, close the drain valves and steam traps, close the pipe warming bypass valve, close the bypass valve, and introduce steam into the desuperheater and pressure reducer at the same time;

[0027] Adjust the desuperheating water quantity through the processor, control the steam parameters to the required pressure and temperature, send a test requirement instruction to the tested regulating valve, the tested regulating valve performs relevant actions, and transmit the feedback signal back to the processor through the system instrument and the valve body instrument, and the processor displays the signal data of the system instrument and the valve body;

[0028] After the test instruction is completed, close the steam inlet pipe section, close the relevant valves in the desuperheating water section, and open all the drain valves, air release valves and steam traps.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. Using an ultra-supercritical coal-fired boiler as the steam source for the test bench, a large amount of steam required during the valve test can be continuously and stably provided. Through the external steam inlet pipe of the ultra-supercritical generating unit, the steam inlet pipe leads out the steam that meets the test requirements of high temperature, high pressure and large flow rate, providing a real test environment for the regulating valve, and solving the problem that large-diameter, high-flow-rate and high-pressure-drop steam regulating valves cannot be simulated under actual working conditions (above 300t / h). The present invention improves the inspection ability of the steam regulating valve, thereby verifying whether the performance of the steam regulating valve meets the actual use requirements.

[0031] 2. The present invention is provided with a high-pressure gate valve and a desuperheating and pressure-reducing device on the intake pipe, and can simultaneously use the desuperheating water of the boiler for pre-adjustment in the boiler. This setting can, while ensuring the safe operation of the boiler and the power station, adjust the parameters of the test bench according to the actual working condition parameters of the steam control valve to meet the use of various projects. In addition, the high-pressure gate valve can connect and block the pipe section of the test system with the ultra-supercritical generating unit during the test process, ensuring that the entire test process of the steam control valve will not pose a safety hazard to the generating unit. By manually and precisely adjusting the high- and low-pressure bypass valves of the steam turbine generating unit in the power station, and synchronously adjusting the boiler fuel quantity and feed water flow rate to ensure the stability of the pressure during the test process.

[0032] 3. The present invention uses temperature sensors, pressure sensors, differential pressure transmitters, and data acquisition devices to real-time display the real-time changes of the pressure, temperature, and steam flow rate before and after the valve at different openings during the action process of the high-pressure steam control valve under actual working conditions, and draw various characteristic curves, so as to further detect the various performances of the control valve.

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0035] Figure 1 It is a schematic diagram of a high-temperature and high-pressure control valve test platform under a power station system of an embodiment;

[0036] Figure 2 It is a schematic diagram of a signal transmission and control method of an embodiment;

[0037] Figure 3 It is a measured display diagram of a step signal command test valve curve of an embodiment;

[0038] Figure 4 It is a measured display diagram of a sine signal command test valve curve of an embodiment;

[0039] Figure 5 It is a measured display diagram of a step-by-step adjustment switch signal command test valve curve of an embodiment.

[0040] Among them, V001: the first steam inlet electric gate valve; V002: the second steam inlet electric gate valve; V101: the regulating valve to be tested; V111: the first warm-up bypass valve; V112: the second warm-up bypass valve; V150: the boiler desuperheating water electric regulating valve; V151: the boiler desuperheating water electric gate valve; V152: the first boiler desuperheating water gate valve; V153: the second boiler desuperheating water gate valve; V201: the bypass valve.

[0041] P101: the test section pressure transmitter; P102: the header pressure transmitter after the test regulating valve; P103: the header pressure transmitter before the test regulating valve; P201: the regulating section pressure transmitter; T101: the header temperature transmitter before the test regulating valve; T102: the header temperature transmitter after the test regulating valve. F101: the flowmeter differential pressure transmitter. Specific implementation mode

[0042] The present invention will be further described below in conjunction with the drawings and embodiments.

[0043] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0044] It should be noted that the terms used herein are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0046] Embodiment 1

[0047] A high-flow high-temperature and high-pressure steam regulating valve test platform under actual working conditions is set in a power station boiler. The boiler adopts refined control measures to pre-regulate the test steam parameters, and adopts the temperature reduction measures of the first and second-stage desuperheaters of the boiler to accurately control the steam temperature and pressure parameters; and through the manual refined adjustment of the high and low pressure bypass valves of the unit, the boiler fuel quantity and the feed water flow are synchronously adjusted to ensure the pressure stability during the test process.

[0048] This embodiment will be described by taking a 660MW ultra-supercritical generating unit as an example.

[0049] It includes an inlet steam pipe section, a test pipe section and a processor. Among them, the inlet steam pipe section includes an inlet steam pipeline. One end of the inlet steam pipeline is connected to the main steam pipeline of an ultra-supercritical power generation unit, and the other end is connected to the test pipe section;

[0050] The test pipe section includes a desuperheating and pressure reducing device (a desuperheater and pressure reducer is selected in this embodiment), a regulating valve test section and a pressure balance section. The inlet of the desuperheating and pressure reducing device is connected to the boiler desuperheating water system of the ultra-supercritical power generation unit through a desuperheating water section, and the outlet is connected to the regulating valve test section and the pressure balance section. The regulating valve test section and the pressure balance section are in parallel. The regulating valve test section is provided with a regulating valve to be tested, and the pressure balance section is provided with a bypass valve;

[0051] The ends of the regulating valve test section and the pressure balance section are connected to a silencer and discharged;

[0052] A pressure transmitter, a temperature transmitter and a differential pressure transmitter are arranged between the desuperheating and pressure reducing device and the regulating valve test section. A pressure transmitter is arranged in front of the regulating valve to be tested, and a pressure transmitter and a temperature transmitter are arranged behind the regulating valve to be tested;

[0053] Each transmitter is connected to the processor. The processor (a unit DCS is selected in this embodiment) is used to control the actions of each valve and determine the performance of the regulating valve to be tested according to the data of the corresponding transmitter.

[0054] As Figure 1 shown, one end of the inlet steam pipeline is connected to the main steam pipeline of a 660MW ultra-supercritical power generation unit, and is isolated by two groups of steam inlet electric gate valves, namely the first steam inlet electric gate valve V001 and the second steam inlet electric gate valve V002 in the middle. The other end is connected to the steam inlet of the desuperheater and pressure reducer.

[0055] The desuperheating water of the desuperheater and pressure reducer is taken from the boiler desuperheating water, and its desuperheating water pressure is the outlet pressure of the boiler feed water pump, which can meet the use under pressure conditions. The desuperheating water volume can be adjusted by the boiler desuperheating water electric regulating valve V150. Boiler desuperheating water electric gate valves V151, the first boiler desuperheating water gate valve V152 and the second boiler desuperheating water gate valve V153 are arranged on the desuperheating water for isolation, and the boiler desuperheating water electric regulating valve V150 can be overhauled online through the isolation of the first boiler desuperheating water gate valve V152 and the second boiler desuperheating water gate valve V153 to avoid problems in desuperheating water regulation. And a viscous damper is arranged in front of the desuperheater and pressure reducer to reduce the influence of vibration on the test platform.

[0056] The steam after the desuperheater and pressure reducer is adjusted to the steam parameters of the test condition and is connected to a flow measurement device for measuring the overall steam flow of the test pipe section.

[0057] After the flow measurement device, two branch steam pipelines are set through a tee, and a viscous damper is set before the tee to reduce the impact of vibration on the system pipeline.

[0058] One of the branch steam pipelines is the test pipe section of the test regulating valve to be tested (i.e., the test section), which is used to test the performance of the V101 regulating valve; the other is the bypass section (i.e., the pressure balance section). When there is a problem with the test valve, the bypass valve V201 is opened to ensure the stability of the system pressure and avoid system overpressure.

[0059] The test section and the pressure balance section are in parallel, merged into one steam pipeline through a tee, connected to a silencer and discharged.

[0060] Drainage points (installing drain valves or water release valves) are set at the low points in the system pipeline, and air release points (installing air release valves) are set at the high points.

[0061] In this embodiment, a data acquisition instrument is used to transmit the signal data of each instrument or transmitter in the system and the signal data of the valve body to be measured to the unit DCS, and the data is processed and displayed in the DCS. The unit DCS feeds back the processed data to the valve to be measured, the system valves and instruments for control.

[0062] In the present invention, high-temperature and high-pressure steam (the highest temperature is 605 °C, the highest pressure is 25 MPa) generated by a 660 MW ultra-supercritical generating unit is input into a desuperheating and pressure-reducing device through a steam inlet pipeline, and the steam parameters are adjusted to the steam parameters required by the test regulating valve through the desuperheating and pressure-reducing device. The outlet of the desuperheating and pressure-reducing device is connected to the test pipe section through a flow measurement device, and the test pipe section provides test conditions for the regulating valve to be measured.

[0063] A first steam inlet electric gate valve V001 and a second steam inlet electric gate valve V002 are set between the steam inlet pipe section and the desuperheating and pressure-reducing device to control the steam inlet of the test bench. In order to ensure the stability of the pipeline during the entire test process of the test bench, viscous dampers are installed before the desuperheating and pressure-reducing device and after the flow measurement device. The flow measurement device is set before the test section to measure the flow rate through the system to be measured. The bypass section is arranged in parallel with the test pipe section, and a bypass valve V201 is set to quickly open when there is a problem with the valve to be measured, ensuring that the valve to be tested does not experience overpressure.

[0064] A gas source pressure sensor is set on the actuator of the regulating valve V101 to be tested, a smart positioner, vibration probes are set on the actuator and the valve body, and relevant signals of the valve body are transmitted to the data acquisition instrument through a transmission cable.

[0065] Such as Figure 2As shown, the data acquisition instrument transmits data to the unit DCS for processing, and the unit DCS feeds back the processed data to the valves under test, system valves, and instruments for control. Both the data acquisition instrument and DCS can record and display in real time the test data of the regulating valve under test (including data such as pressure before and after the test valve, temperature, flow rate, valve opening, and air source pressure), and plot relevant data curves. The water draining and air venting valves and the steam traps are used to drain the residual air in the pipeline and drain the condensed water before and after the experiment.

[0066] Two warm-up bypass valves V111 and V112 are connected in parallel to the regulating valve V101 under test, and the warm-up bypass valves are used to warm up the system before startup.

[0067] Working process:

[0068] When the unit is officially started, the desuperheating water pipeline is filled with water. Open the relevant desuperheating water valves V150, V151, V152, V153, open the bypass valves of the electric gate valves V001 and V002, open all the water draining and air venting valves and the steam traps, open the warm-up bypass valves V111 and V112, and carry out the work of draining water, venting air, and warming up.

[0069] At the same time, by adjusting the fuel quantity, boiler air distribution, boiler combustion, feed water flow rate, and the opening of the high and low bypass valves, control the change rate of the boiler temperature not to exceed 0.5 °C / min and the pressure drop rate not to exceed 0.01 MPa / min. After exhausting the air in the desuperheating water pipeline, close the air venting valve of the desuperheating water system and close the desuperheating water regulating valve V150.

[0070] The steam pipeline is warmed up. When the superheat degree of 10 °C appears after the valve, close the water draining and steam trap valves, close the warm-up bypass valves V111 and V112, and start to open the electric gate valves V001 and V002 to introduce steam into the desuperheater.

[0071] Control the desuperheater and the desuperheating water regulating valve V150 through the unit DCS to adjust the desuperheating water quantity, and control the steam parameters to the required pressure and temperature. When the steam parameters in the test section reach the required pressure and temperature range, send a test requirement instruction to the regulating valve V101 under test through the unit DCS, such as test instructions like the positioner adjustment switch, solenoid valve switch, step signal switch, etc., as Figures 3 - 5 shown. After the regulating valve V101 under test and the system receive the instruction, they perform relevant actions, and transmit the feedback signal back to the data acquisition instrument and the unit DCS through the system instrument and the valve body instrument for feedback. The data acquisition instrument and DCS can display the system instrument and valve body signal data in real time and can plot relevant curves. After the test instruction is completed, close the electric gate valves V001 and V002, close the relevant desuperheating water valves V150, V151, V152, V153, and open all the water draining and air venting valves. Complete the test process of the large-diameter high-temperature and high-pressure regulating valve.

[0072] The present invention is provided with a bypass valve V201, which has a function of rapid opening, and ensures the pressure of the system pipe section during the test of the regulated valve to be measured, avoiding overpressure of the valve to be measured and the system. After the test is completed, the electric gate valves V001 and V002 are closed to block the steam of the ultra-supercritical generator set and protect the normal operation of the unit.

[0073] The present invention utilizes a data acquisition instrument and the unit DCS to real-time display the changes of data parameters such as valve position command, valve position feedback, air source pressure, system pressure, system temperature and system flow rate during the operation of the regulated valve to be measured under the actual required working conditions. The response frequency of all instrument transmitters is not less than 1000Hz, and the sampling and display frequency of the data acquisition instrument system is 20ms, that is, 50 data can be displayed per second. And relevant curves are drawn.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made by those skilled in the art without creative labor within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature and high pressure regulating valve test platform under a power station system, characterized in that: It is mounted on a power station system and includes a steam inlet pipe section, a test pipe section and a processor, wherein the steam inlet pipe section includes a steam inlet pipeline, one end of which is connected to a main steam pipeline of an ultra-supercritical generator set, and the other end of which is connected to the test pipe section; The test pipe section includes a temperature reduction and pressure reduction device, a regulating valve test section and a pressure balance section. The inlet of the temperature reduction and pressure reduction device is connected to the boiler temperature reduction water system of the ultra-supercritical generator set through the temperature reduction water section, and the outlet is connected to the regulating valve test section and the pressure balance section. The regulating valve test section and the pressure balance section are connected in parallel. The regulating valve test section is provided with a tested regulating valve, and the pressure balance section is provided with a bypass valve. The ends of the regulating valve test section and the pressure balance section are connected to the muffler and discharged; A pressure transmitter, a temperature transmitter and a differential pressure transmitter are arranged between the temperature reduction and pressure reduction device and the regulating valve test section, a pressure transmitter is arranged before the tested regulating valve, and a pressure transmitter and a temperature transmitter are arranged after the tested regulating valve; Each transmitter is connected to a processor, and the processor is used to control the action of each valve and determine the performance of the tested regulating valve according to the data of the corresponding transmitter.

2. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 1, characterized in that: The steam inlet pipeline is provided with two sets of steam inlet electric gate valves to isolate the main steam pipeline from the test pipe section.

3. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 1, characterized in that: The temperature reduction and pressure reduction device is a temperature reduction and pressure reduction device, and the steam inlet of the temperature reduction and pressure reduction device is connected to the steam inlet pipeline.

4. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 1, characterized in that: The cooling water section is provided with a boiler cooling water electric gate valve, a first boiler cooling water gate valve, a boiler cooling water electric regulating valve and a second boiler cooling water gate valve in sequence. The boiler cooling water electric regulating valve is used to adjust the cooling water flow rate, and the boiler cooling water electric gate valve, the first boiler cooling water gate valve and the second boiler cooling water gate valve are used to isolate the cooling water.

5. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 1, characterized in that: A viscous damper is arranged in front of the temperature reduction and pressure reduction device, and a flow measurement device is arranged behind the temperature reduction and pressure reduction device for measuring the overall steam flow of the test pipe section, and the flow measurement device is connected to the processor.

6. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 5, characterized in that: A viscous damper is arranged between the flow measurement device and the test pipe section.

7. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 1, characterized in that: A pressure transmitter is arranged in front of the bypass valve.

8. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 1, characterized in that: The tested regulating valve is connected in parallel with two series-connected warm-up pipe bypass valves.

9. A high temperature and high pressure regulating valve test platform for a power station system as claimed in claim 1, characterized in that: The high points of the test pipe section are provided with a plurality of air release valves, and the low points or / and before the valves are provided with a plurality of steam traps or water drain valves.

10. A testing method for a high temperature and high pressure regulating valve test platform in a power station system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Fill the cooling water pipeline with water, open all valves in the cooling water section, connect the steam inlet pipe section with the main steam pipeline, open all the air vent valves, water drain valves and steam traps in the system, open the bypass valve, and drain water, air and warm up the pipes; By adjusting the fuel quantity, boiler air distribution, boiler combustion, feed water flow and high and low bypass valve opening, the boiler temperature rate change is controlled to not exceed the set value and the pressure drop rate does not exceed the preset value; After exhausting the air in the desuperheating water pipeline, close the vent valve of the desuperheating water section, close the electric regulating valve of the boiler desuperheating water, and warm up the steam inlet pipe section. When the temperature after the valve reaches the set value, close the drain valve and the steam trap, close the bypass valve for warming up the pipe, close the bypass valve, and introduce the steam into the desuperheating and pressure reducing device at the same time. The processor adjusts the cooling water volume to control the steam parameters to the required pressure and temperature, issues a test request instruction to the tested regulating valve, and the tested regulating valve performs relevant actions, and transmits feedback signals back to the processor through the system instrument and the valve body instrument, and the processor displays the signal data of the system instrument and the valve body; After the test instructions are completed, close the steam inlet pipe section, close the relevant valves of the cooling water section, and open all drain valves, air vent valves and steam traps.

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