High-pressure heater input method

Abstract

The invention provides a high-pressure heater input method, which relates to the technical field of thermal power generation, and comprises the following steps: confirming that a high-pressure heater combined valve electromagnetic valve protection device is input, opening a high-pressure heater water inlet combined valve and an outlet check valve, opening # 1 and # 2 high-pressure heater dangerous release manual doors, closing a direct release door, and preparing for system deflation; injecting water into the high-pressure water adding side until the high-pressure water adding side is full, exhausting air in the system through exhausting operation, and then performing constant-pressure inspection; the high-pressure heater dangerous discharge electric door is fully opened preferentially before the steam inlet electric door of the high-pressure heater is opened, direct connection of the high-pressure heater steam side is achieved, the pipe heating efficiency is greatly improved, steam side temperature rise rate emergencies are effectively reduced through smooth flow heating of steam, the thermal stress effect of the steam on a high-pressure heater tube bundle is reduced, the leakage rate of the high-pressure heater is reduced, and the service life of the high-pressure heater is prolonged. And the input rate of the high-pressure heater is increased, the condensed drain water input in the early stage is directly discharged through the high-pressure heater dangerous discharge electric door, the index qualification rate after the high-pressure heater drain water is recycled in the later stage is ensured, and the economical efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power generation, and in particular to a method for putting a high-voltage heater into operation. Background Art

[0002] The high-pressure heater is an important auxiliary equipment for heat recovery and heating of feed water in thermal power plants. It uses the steam extracted from the steam turbine for heat exchange, which reduces the steam flow rate of the last few stages of the steam turbine, reduces the flow area of ​​the last few stages, reduces the length of the last stage blades, and solves the trouble of designing and manufacturing the last stage blades of the steam turbine. In addition, the operation of the high-pressure heater can heat the feed water efficiently and stably, thereby reducing the heat load on the boiler side, reducing the fuel consumption rate, improving the thermal efficiency of the unit, and reducing the fuel consumption rate; However, during the actual operation and commissioning of the high-pressure heater, leakage often occurs and the high-pressure heater is forced to shut down. Among them, the high-pressure heater leakage accounts for a large proportion due to the excessive control of temperature rise and temperature drop rate during the commissioning of the high-pressure heater. The decoupling of the high-pressure heater during unit operation not only affects the safe and stable operation of the turbine, but also directly affects the economic indicators of the power plant. Therefore, the present invention proposes a method for commissioning a high-pressure heater to solve the problems existing in the prior art. Summary of the invention

[0003] In view of the above problems, the present invention proposes a high-pressure heater commissioning method, which shortens the high-pressure heater commissioning time, improves the control accuracy of the high-pressure heater inlet steam temperature rise rate, and reduces the thermal stress on the internal tube bundle of the high-pressure heater, thereby achieving the purpose of reducing the high-pressure heater leakage rate, improving the high-pressure heater commissioning rate, and ensuring the economic operation of the unit.

[0004] To achieve the purpose of the present invention, the present invention is implemented by the following technical solution: a method for putting a high-pressure heater into operation, comprising the following steps: S1: Confirm that the solenoid valve protection device of the high-pressure heater connection valve has been put into use, open the high-pressure heater water inlet connection valve and the outlet check valve, open the #1 and #2 high-pressure heater dangerous release manual doors, and close the direct release door to prepare for system deflation; S2: Fill the high-pressure water supply side with water until it is full, and exhaust the air in the system to ensure that all the air is exhausted. Then perform a constant pressure check to confirm that the high-pressure water supply outlet electric door is open and the high-pressure water supply side bypass electric door is closed. S3: Open the relevant valves from the high-pressure heater to the deaerator to warm up the pipes, then close the high-pressure heater water filling gate and open the high-pressure heater water inlet electric gate; S4: First open the #1 and #2 high-pressure heater dangerous release electric doors, and then open the high-pressure heater steam inlet electric door, keep the steam side pressure of #2 high-pressure heater higher than that of #1 high-pressure heater, and control the inlet steam temperature rise rate and outlet water temperature rise rate; S5: Close the #1 and #2 high pressure heater emergency release electric doors according to the steam side temperature to stabilize the high pressure heater water level. When the steam side pressure reaches the set value, adjust the drain path to the pressure deaerator, close the drain door, and fully open the steam inlet electric door; S6: After confirming that the high-pressure heater is operating normally, the #1 and #2 high-pressure heater emergency drain interlocks and high-pressure heater water level protection interlocks are activated respectively.

[0005] A further improvement is that in S1, when confirming the high-pressure combined valve solenoid valve protection device, first check whether the power supply, signal line and logic control of the protection device are normal, and then confirm that it is online and available.

[0006] A further improvement is that in S1, preparations are made for deflation of the system. Before deflation, all relevant personnel evacuate to a safe area, and monitoring equipment is turned on to detect system operating parameters of the entire process and display them on the control terminal.

[0007] A further improvement is that in S2, during the water injection process, the exhaust valve on the high water addition side is opened at the same time to exhaust the air in the system. When exhausting, the water outlet of the exhaust valve is observed. When the exhaust valve discharges water continuously and stably, it means that the air in the system has been exhausted. After confirming that the air in the system has been exhausted, the exhaust valve is closed in time.

[0008] A further improvement is that in S2, the constant pressure check is specifically: after water is injected and the air is exhausted, the pressure gauge on the high water addition side is observed to confirm whether the pressure is stable and whether it reaches the predetermined pressure value.

[0009] A further improvement is that: S3 comprises the following steps: S31: Open the high pressure heater drain to the deaerator stop valve and the drain valve after the check valve to perform pipe heating operation and keep the pipe heating normal; S32: Close the high-pressure water filling door for the first, second or third and fourth times, and open the high-pressure water inlet electric door.

[0010] A further improvement is that: said S4 comprises the following steps: S41: Open #1 and #2 high-voltage dangerous electric doors; S42: Open the electric steam inlet doors of #1 and #2 high-pressure heaters to keep the steam pressure of #2 high-pressure heater higher than that of #1 high-pressure heater; S43: Control the inlet steam temperature rise of #1 and #2 high pressure heaters to ≤2℃ / min, and synchronously control the outlet water temperature rise of #2 high pressure heater to ≤3℃ / min.

[0011] A further improvement is that: S5 comprises the following steps: S51: Close the #1 and #2 high-pressure heater danger release electric doors according to the temperature of the high-pressure heater steam side to stabilize the high-pressure heater water level; S52: When the pressure on the steam side of the high pressure heater is ≥0.7Mpa, open the manual door of the outlet of the #1 high pressure heater steam trap to pour the high pressure heater steam into the pressure deaerator; S53: Close the #1 and #2 high pressure heater dangerous discharge electric doors, and close the high pressure heater drain to the deaerator check valve and back drain valve; S54: Fully open #1 and #2 high-pressure steam inlet electric doors.

[0012] A further improvement is that: S6 comprises the following steps: S61: Check and confirm that the high pressure heater is operating normally; S62: Record the water level of #1 and #2 high pressure heaters and the outlet water temperature of #2 high pressure heaters respectively; S63: Put #1 and #2 high pressure heater emergency drain interlock and high pressure heater water level protection interlock into operation respectively.

[0013] Further improvements are to detect and confirm that the high-pressure heater is operating normally, specifically: observe the operating parameters of #1 and #2 high-pressure heaters, including inlet and outlet pressures, temperature, and flow, through the DCS distributed control system and on-site instruments to ensure that they are within the normal range; then use a listening rod close to the high-pressure heater body to check for abnormal sounds, including leakage and vibration.

[0014] The beneficial effects of the present invention are: 1. The present invention fully opens the high-pressure heater dangerous discharge electric door in priority before the high-pressure heater opens the steam electric door, so as to realize direct passage of the high-pressure heater steam side, greatly improve the heating efficiency of the pipes, and the smooth flow and heating of steam also effectively reduce the sudden rise and drop of the temperature rise rate on the steam side, greatly reduce the thermal stress of steam on the high-pressure heater tube bundle, and reduce the leakage rate of the high-pressure heater from the perspective of operation investment, thereby achieving a 100% investment rate of the high-pressure heater, and the condensed drain in the early stage of investment is directly discharged through the high-pressure heater dangerous discharge electric door, ensuring the qualified rate of indicators after the high-pressure heater drain is recovered in the later stage, thereby improving the economic efficiency of the unit operation.

[0015] 2. The present invention shortens the time for putting the high-pressure heater into operation, reduces the amount of steam for heating the pipes, and reduces the labor intensity of the operating personnel; makes the temperature rise rate of the steam side in the initial stage of operation of the high-pressure heater more controllable, and reduces the leakage of the high-pressure heater caused by the internal tube bundle stress; the condensed drain in the early stage of the high-pressure heater is directly discharged through the high-pressure heater dangerous discharge electric door, which effectively ensures the qualified rate of the feed water index after the high-pressure heater drain is recovered; the long-term safe and stable operation of the high-pressure heater not only ensures the safe and stable operation of the steam turbine, but also ensures the stability of the boiler feed water temperature, obtains high-value-added and high-profit steam, greatly improves the thermal efficiency of the unit operation, and ensures the economy of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the principle of the present invention; Figure 2It is a flow chart of the present invention. DETAILED DESCRIPTION

[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0018] Embodiment 1 according to Figure 1 , 2 As shown, this embodiment provides a method for putting a high-voltage heater into operation, comprising the following steps: S1: Confirm that the solenoid valve protection device of the high-pressure heater connection valve has been put into use, open the high-pressure heater water inlet connection valve and the outlet check valve, open the #1 and #2 high-pressure heater dangerous release manual doors, and close the direct release door to prepare for system deflation; S2: Fill the high-pressure water supply side with water until it is full, and exhaust the air in the system to ensure that all the air is exhausted. Then perform a constant pressure check to confirm that the high-pressure water supply outlet electric door is open and the high-pressure water supply side bypass electric door is closed. S3: Open the relevant valves from the high-pressure heater to the deaerator to warm up the pipes, then close the high-pressure heater water filling gate and open the high-pressure heater water inlet electric gate; S4: First open the #1 and #2 high-pressure heater dangerous release electric doors, and then open the high-pressure heater steam inlet electric door, keep the steam side pressure of #2 high-pressure heater higher than that of #1 high-pressure heater, and control the inlet steam temperature rise rate and outlet water temperature rise rate; S5: Close the #1 and #2 high pressure heater emergency release electric doors according to the steam side temperature to stabilize the high pressure heater water level. When the steam side pressure reaches the set value, adjust the drain path to the pressure deaerator, close the drain door, and fully open the steam inlet electric door; S6: After confirming that the high-pressure heater is operating normally, the #1 and #2 high-pressure heater emergency drain interlocks and high-pressure heater water level protection interlocks are activated respectively.

[0019] Before the high-pressure heater opens the steam electric door, the high-pressure heater dangerous-release electric door should be fully opened first to achieve direct passage of the high-pressure heater steam side, greatly improving the heating efficiency of the pipes. The smooth flow of steam and heating also effectively reduce the sudden increase and decrease of the temperature rise rate on the steam side, greatly reducing the thermal stress of steam on the high-pressure heater tube bundle. From the perspective of operation input, the leakage rate of the high-pressure heater is reduced, thereby achieving a 100% high-pressure heater input rate, and the drain condensed in the early stage of input (the drain condensed in the early stage of input is the main reason for the excessive indicators) is directly discharged through the high-pressure heater dangerous-release electric door, ensuring the qualified rate of indicators after the high-pressure heater drain is recovered in the later stage, thereby improving the economic efficiency of the unit operation.

[0020] Embodiment 2 according to Figure 1 , 2 As shown, this embodiment provides a method for putting a high-voltage heater into operation, comprising the following steps: Confirm that the high-pressure heater solenoid valve protection device has been put into use, open the high-pressure heater water inlet valve and the outlet check valve, open the #1 and #2 high-pressure heater dangerous manual doors, and close the direct release door to prepare for system deflation; when confirming the high-pressure heater solenoid valve protection device, first check whether the power supply, signal line, and logic control of the protection device are normal, and then confirm that it is online and available; prepare for system deflation. Before deflation, all relevant personnel evacuate to a safe area, and turn on the monitoring equipment to detect the system operating parameters of the entire process and display them on the control terminal. Confirm that the high-pressure heater solenoid valve protection device has been put into use: This step is to ensure that in an emergency, the solenoid valve protection device can act quickly and accurately to protect the high-pressure heater (high-pressure heater) and related systems from damage. Check whether the power supply, signal line, and logic control of the protection device are normal, and confirm that it is online and available. Open the high-pressure heater water inlet valve and the outlet check valve: The water inlet valve is an important valve that controls the water inlet of the high-pressure heater. Its opening allows water to flow to the high-pressure heater for heating. The function of the outlet check valve is to prevent the backflow of fluid from damaging the equipment when the pressure of the high-pressure heater or subsequent system decreases. Opening this door ensures that the water flows normally in the high-pressure heater and is discharged smoothly. Open #1 and #2 high-pressure heater emergency manual doors: Emergency manual doors are usually used to quickly discharge the pressure or fluid in the high-pressure heater in an emergency to prevent overpressure damage. These manual doors are opened to provide a safe discharge channel when the system is ready for venting or other maintenance operations. Close the direct release door: The direct release door refers to a valve directly connected to the inlet and outlet of the high-pressure heater, which is used to quickly discharge the fluid under specific circumstances. Closing this door is to ensure that the fluid can flow along the predetermined path during the system venting or adjustment process to avoid unnecessary pressure fluctuations or fluid leakage. After the above valve operations are completed, the system is ready for venting operations. Venting is usually to remove air or accumulated non-condensable gases in the system, which will affect the thermal efficiency and safety performance of the system. Before venting, ensure that all relevant personnel have evacuated to a safe area and prepare necessary monitoring and emergency equipment.

[0021] Fill the high-pressure water supply side with water until it is full, and ensure that the air in the system is exhausted by exhausting the system, and then perform a constant pressure check to confirm that the high-pressure water outlet electric door is open and the high-pressure water supply side bypass electric door is closed; during the water filling process, open the exhaust valve on the high-pressure water supply side at the same time to exhaust the air in the system. When exhausting, observe the water outlet of the exhaust valve. When the exhaust valve continuously and stably discharges water, it means that the air in the system has been exhausted. After confirming that the air in the system has been exhausted, close the exhaust valve in time. The specific constant pressure check is: after filling and exhausting, observe the pressure gauge on the high-pressure water supply side to confirm whether the pressure is stable and whether it reaches the predetermined pressure value. Fill the high-pressure water supply side with water until it is full: Open the water injection valve: First, you need to open the water injection valve on the high-pressure water supply side and start to inject water into the high-pressure water supply side. Observe the water level: During the water filling process, you should closely observe the water level gauge of the high-pressure water supply to ensure that the water level rises gradually. Close the water injection valve: When the water level gauge shows that the high-pressure water supply side is full of water, the water injection valve should be closed in time to prevent the water level from being too high. Exhaust operation to ensure that the air in the system is exhausted: Open the exhaust valve: During the water filling process, the exhaust valve on the high-pressure water side should be opened at the same time to exhaust the air in the system. Observe the exhaust situation: When exhausting, pay attention to the water outlet of the exhaust valve. When the exhaust valve continuously and stably discharges water, it means that the air in the system has been basically exhausted. Close the exhaust valve: After confirming that the air in the system has been exhausted, the exhaust valve should be closed in time. Constant pressure check: Observe the pressure change: After water filling and exhaust, the pressure gauge on the high-pressure water side should be observed to confirm whether the pressure is stable and reaches the predetermined pressure value. Adjust the pressure: If the pressure is unstable or does not reach the predetermined value, corresponding adjustments should be made, such as opening or closing certain valves to ensure that the system pressure is stable. Confirm that the high-pressure water outlet electric door is open and the high-pressure water side bypass electric door is closed: Check the electric door status: After completing the above steps, check the status of the high-pressure water outlet electric door and the high-pressure water side bypass electric door. Ensure that the high-pressure water outlet electric door is fully opened so that the water in the high-pressure can flow out smoothly. Make sure that the bypass electric door on the high-pressure heater water side is completely closed to prevent water from flowing through the bypass and affecting the normal operation of the high-pressure heater. Record and confirm: Record the status of the electric door in the operation record and confirm again whether its status is correct. Through the above steps, it can be ensured that the high-pressure heater water side is filled with water, the air in the system is exhausted, and the high-pressure heater water outlet electric door is opened and the bypass electric door on the high-pressure heater water side is closed, preparing for the normal operation of the high-pressure heater.

[0022] Open the relevant valves from the high-pressure heater to the deaerator, perform the pipe heating operation, then close the high-pressure heater water filling gate and open the high-pressure heater water inlet electric gate; the specific steps include: open the high-pressure heater to drain to the deaerator stop valve and the drain gate after the check valve, perform the pipe heating operation, and keep the pipe heating normal; close the high-pressure heater water filling gate one, two, three, and four times, and open the high-pressure heater water inlet electric gate.

[0023] First open the #1 and #2 high-pressure heater danger-release electric doors, then open the high-pressure heater steam inlet electric door, keep the #2 high-pressure heater steam side pressure higher than that of #1 high-pressure heater, and control the steam inlet temperature rise rate and the outlet water temperature rise rate; specifically include the following steps: open the #1 and #2 high-pressure heater danger-release electric doors; open the #1 and #2 high-pressure heater steam inlet electric doors, keep the #2 high-pressure heater steam side pressure higher than that of #1 high-pressure heater; control the #1 and #2 high-pressure heater steam inlet temperature rise ≤2℃ / min, and synchronously control the #2 high-pressure heater outlet water temperature rise ≤3℃ / min.

[0024] According to the temperature on the steam side, close the #1 and #2 high-pressure heater dangerous discharge electric doors to stabilize the high-pressure heater water level. When the steam side pressure reaches the set value, adjust the drain path to the pressure deaerator, close the drain door, and fully open the steam inlet electric door; specifically, the following steps are included: according to the temperature on the steam side of the high-pressure heater, close the #1 and #2 high-pressure heater dangerous discharge electric doors to stabilize the high-pressure heater water level; when the high-pressure heater steam side pressure ≥0.7Mpa, open the #1 high-pressure heater drain outlet manual door to pour the high-pressure heater drain to the pressure deaerator; close the #1 and #2 high-pressure heater dangerous discharge electric doors, and close the high-pressure heater drain to the drain door behind the deaerator check valve; fully open the #1 and #2 high-pressure heater steam inlet electric doors After confirming that the high-pressure heater is operating normally, the emergency drain interlock and high-pressure heater water level protection interlock of #1 and #2 are respectively put into operation; the specific steps include: check and confirm that the high-pressure heater is operating normally; record the water level of #1 and #2 high-pressure heater and the outlet water temperature of #2 high-pressure heater respectively; put into operation the emergency drain interlock and high-pressure heater water level protection interlock of #1 and #2 high-pressure heater respectively; among which, the detection and confirmation that the high-pressure heater is operating normally is specifically as follows: observe the operating parameters of #1 and #2 high-pressure heaters, including inlet and outlet pressures, temperature, and flow, through the DCS distributed control system and on-site instruments to ensure that they are within the normal range; then use a listening rod close to the high-pressure heater body to check whether there are any abnormal sounds, including leakage and vibration.

[0025] Confirm safety: Ensure that all relevant safety measures are in place, such as wearing personal protective equipment and complying with operating procedures. Tools and instruments: Prepare necessary tools such as notebooks, pens, thermometers, flashlights, etc. Check the operating status of the high-pressure heater: Observe the operating status: Observe the operating parameters of #1 and #2 high-pressure heaters, such as inlet and outlet pressures, temperatures, flow rates, etc. through DCS (distributed control system) or on-site instruments to ensure that they are within the normal range. Listening check: Use a listening stick or ear close to the high-pressure heater body to check for abnormal sounds, such as leakage, vibration, etc. Record the high-pressure heater water level and outlet water temperature: Water level record: Check the DCS or on-site water level gauge to accurately record the water level of #1 and #2 high-pressure heaters. Note that the normal range of water levels for different high-pressure heaters is different, and it is necessary to refer to the equipment manual or operating procedures. Outlet water temperature record: Also record the outlet water temperature of #2 high-pressure heater through DCS or on-site thermometer. The outlet water temperature should be consistent with the design value or normal operating range. Put the emergency drain interlock into operation: Check the interlock logic: Check whether the emergency drain interlock logic settings of #1 and #2 high-pressure heaters are correct in the DCS, including the water level high limit, action time, etc. Simulation test: If conditions permit, simulate the high water level situation to check whether the emergency drain valve can operate correctly and discharge water to the drain expansion tank or the designated location. Formal start-up: After confirmation, put the emergency drain interlock of #1 and #2 high-pressure heaters into automatic mode through the DCS or the on-site operation console. Put the high-pressure heater water level protection interlock into operation: Check the interlock logic: Check the logic settings of the high-pressure heater water level protection interlock, including the water level low limit, high limit, delay time, etc. Simulation test: If conditions permit, conduct a simulation test to verify whether the system can automatically take protection measures when the water level exceeds the set range, such as switching to bypass, shutting down, etc. Formal start-up: After confirmation, put the high-pressure heater water level protection interlock into automatic mode to ensure rapid response in the event of system abnormalities and protect equipment and system safety. Subsequent monitoring and recording: Continuous monitoring: After the interlock is put into operation, the operating status of the high-pressure heater is continuously monitored, especially the changes in water level and outlet water temperature. Record log: The entire process of inspection, testing, and interlocking is recorded, including time, operator, results, etc., for subsequent review and analysis.

[0026] The high-pressure heater startup method fully opens the high-pressure heater dangerous-release electric door in priority before the high-pressure heater opens the steam electric door, so as to realize direct passage of the high-pressure heater steam side, greatly improve the heating efficiency of the pipes, and the smooth flow heating of steam also effectively reduces the sudden rise and drop of the temperature rise rate on the steam side, greatly reduces the thermal stress of steam on the high-pressure heater tube bundle, and reduces the leakage rate of the high-pressure heater from the perspective of operation startup, thereby achieving a 100% high-pressure heater startup rate, and the drain condensed in the early stage of startup (the drain condensed in the early stage of startup is the main reason for the excessive indicators) is directly discharged through the high-pressure heater dangerous-release electric door, ensuring the qualified rate of indicators after the high-pressure heater drain is recovered in the later stage, thereby improving the economic efficiency of unit operation.

[0027] In summary, the shortening of the high-pressure heater commissioning time has reduced the amount of steam for heating pipes and the labor intensity of operators; the control of the temperature rise rate on the steam side in the initial stage of operation of the high-pressure heater has become more controllable, reducing the occurrence of leakage caused by internal tube bundle stress in the high-pressure heater; the drain condensed in the early stage of the high-pressure heater commissioning (the drain condensed in the early stage of commissioning is the main reason for the excessive indicators) is directly discharged through the high-pressure heater dangerous release electric door, effectively ensuring the qualified rate of the feed water indicators after the high-pressure heater drain is recovered; the long-term safe and stable operation of the high-pressure heater not only ensures the safe and stable operation of the turbine, but also ensures the stability of the boiler feed water temperature, obtains high-value-added and high-profit steam, greatly improves the thermal efficiency of the unit operation, and ensures the economy of the power plant.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for putting a high-pressure heater into operation, characterized in that: The following steps are involved: S1: Confirm that the solenoid valve protection device of the high-pressure heater connection valve has been put into use, open the high-pressure heater water inlet connection valve and the outlet check valve, open the #1 and #2 high-pressure heater dangerous release manual doors, and close the direct release door to prepare for system deflation; S2: Fill the high-pressure water supply side with water until it is full, and exhaust the air in the system to ensure that all the air is exhausted. Then perform a constant pressure check to confirm that the high-pressure water supply outlet electric door is open and the high-pressure water supply side bypass electric door is closed. S3: Open the relevant valves from the high-pressure heater to the deaerator to warm up the pipes, then close the high-pressure heater water filling gate and open the high-pressure heater water inlet electric gate; S4: First open the #1 and #2 high-pressure heater dangerous release electric doors, and then open the high-pressure heater steam inlet electric door, keep the steam side pressure of #2 high-pressure heater higher than that of #1 high-pressure heater, and control the inlet steam temperature rise rate and outlet water temperature rise rate; S5: Close the #1 and #2 high pressure heater emergency release electric doors according to the steam side temperature to stabilize the high pressure heater water level. When the steam side pressure reaches the set value, adjust the drain path to the pressure deaerator, close the drain door, and fully open the steam inlet electric door; S6: After confirming that the high-pressure heater is operating normally, activate the #1 and #2 high-pressure heater emergency drain interlock and high-pressure heater water level protection interlock respectively.

2. A method for putting a high-pressure heater into operation according to claim 1, characterized in that: In S1, when confirming the high-pressure joint valve solenoid valve protection device, first check whether the power supply, signal line, and logic control of the protection device are normal, and then confirm that it is online and available.

3. A method for putting a high-pressure heater into operation according to claim 2, characterized in that: In S1, preparations are made for deflation of the system. Before deflation, all relevant personnel evacuate to a safe area, and monitoring equipment is turned on to detect system operating parameters of the entire process and display them on the control terminal.

4. A method for putting a high-pressure heater into operation according to claim 1, characterized in that: In S2, during the water injection process, the exhaust valve on the high water addition side is opened at the same time to exhaust the air in the system. When exhausting, the water outlet of the exhaust valve is observed. When the exhaust valve discharges water continuously and stably, it means that the air in the system has been exhausted. After confirming that the air in the system has been exhausted, the exhaust valve is closed in time.

5. A method for putting a high-pressure heater into operation according to claim 4, characterized in that: In S2, the constant pressure check is specifically as follows: after water is injected and exhaust is performed, the pressure gauge on the high water supply side is observed to confirm whether the pressure is stable and whether the predetermined pressure value is reached.

6. A method for putting a high-pressure heater into operation according to claim 1, characterized in that: The S3 comprises the following steps: S31: Open the high pressure heater drain to the deaerator stop valve and the drain valve after the check valve to perform pipe heating operation and keep the pipe heating normal; S32: Close the high-pressure water filling door for the first, second or third and fourth times, and open the high-pressure water inlet electric door.

7. A method for putting a high-pressure heater into operation according to claim 1, characterized in that: The S4 comprises the following steps: S41: Open #1 and #2 high-voltage dangerous electric doors; S42: Open the electric steam inlet doors of #1 and #2 high-pressure heaters to keep the steam pressure of #2 high-pressure heater higher than that of #1 high-pressure heater; S43: Control the inlet steam temperature rise of #1 and #2 high pressure heaters to ≤2℃ / min, and synchronously control the outlet water temperature rise of #2 high pressure heater to ≤3℃ / min.

8. A method for putting a high-pressure heater into operation according to claim 1, characterized in that: The S5 comprises the following steps: S51: Close the #1 and #2 high-pressure heater danger release electric doors according to the temperature on the high-pressure heater steam side to stabilize the high-pressure heater water level; S52: When the pressure on the steam side of the high pressure heater is ≥0.7Mpa, open the manual door of the outlet of the #1 high pressure heater steam trap to pour the high pressure heater steam into the pressure deaerator; S53: Close the #1 and #2 high pressure heater dangerous discharge electric doors, and close the high pressure heater drain to the deaerator check valve and back drain valve; S54: Fully open #1 and #2 high-pressure steam inlet electric doors.

9. A method for putting a high-pressure heater into operation according to claim 1, characterized in that: The S6 comprises the following steps: S61: Check and confirm that the high pressure heater is operating normally; S62: Record the water level of #1 and #2 high pressure heaters and the outlet water temperature of #2 high pressure heaters respectively; S63: Put #1 and #2 high pressure heater emergency drain interlock and high pressure heater water level protection interlock into operation respectively.

10. A method for putting a high-pressure heater into operation according to claim 9, characterized in that: In S61, the normal operation of the high-pressure heater is confirmed by checking: the operating parameters of #1 and #2 high-pressure heaters, including inlet and outlet pressures, temperature, and flow, are observed through the DCS distributed control system and field instruments to ensure that they are within the normal range; and a listening rod is placed close to the high-pressure heater body to check for abnormal sounds, including leakage sounds and vibration sounds.

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