JP2011208875A - Hydraulic test method of high-pressure water supply system in power generation facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hydraulic pressure of a boiler water supply pump from being applied to a high-pressure water supply system at once.SOLUTION: In this hydraulic test method in performing hydraulic test of the high-pressure water supply system of power generation facilities, a water supply bypass valve B8a for starting composed of a needle valve is gradually opened by closing an economizer inlet valve B10, opening an economizer inlet valve bypass valve B10a, opening a water supply flow rate regulation valve B9 for starting, and closing a water supply flow rate regulation valve prevalve B8 for starting, and the economizer inlet valve bypass valve B10a is gradually closed when the water supply bypass valve B8a for starting is fully opened.

Description

  The present invention relates to a water pressure test method for a high-pressure water supply system in a thermal power generation facility, for example.

  A conventional water pressure test method for this type of high-pressure water supply system includes a start-up water supply line connected from the outlet of the boiler water pump to the inlet of the high-pressure water heater, and a start-up water supply flow rate control valve provided in the start-up water supply line A high pressure water supply system having a front valve and a start water supply flow rate adjustment valve, a high pressure water supply line connected from the outlet of the high pressure water heater to the inlet of the economizer, and a economizer inlet valve provided in the high pressure water supply line; A starting water supply bypass system having a first bypass pipe connected to the starting water supply pipe so as to bypass the start water supply flow rate control valve, and a starting water supply bypass valve provided in the first bypass pipe; A second bypass line that bypasses the economizer inlet valve and connects to the high-pressure water supply pipe, and a economizer inlet bypass system that includes the economizer inlet valve bypass valve provided in the second bypass pipe; It has.

  Then, close the economizer inlet valve, close the economizer inlet valve bypass valve, close the startup feedwater bypass valve, open the startup feedwater flow rate control valve, and gradually open the startup feedwater flow rate control valve By doing so, the water pressure test of the high pressure water supply system was conducted.

  Further, as a conventional water pressure test apparatus, for example, a water pressure test is performed by supplying hot water generated in a deaerator to a pipe or the like with a pressure pump (Patent Document 1).

Japanese Utility Model Publication No. 62-12849

  However, when performing the conventional water pressure test method, the economizer inlet valve, economizer inlet valve bypass valve, and starter feedwater bypass valve are closed and opened by the starter feedwater flow rate control valve. There is a problem that the water pressure of the pump is applied to the high-pressure water supply system at once, and the high-pressure heater of the high-pressure water heater is damaged.

  Then, this invention makes it a subject to provide the water pressure test method of the high voltage | pressure water supply system in power generation equipment which can perform a water pressure test so that the water pressure of a boiler feed water pump may not apply to a high pressure water supply system at a stretch.

  The water pressure test method for the high-pressure water supply system in the power generation facility according to the present invention is provided in the start-up water supply line 80 connected from the outlet of the boiler water supply pump 50 to the inlet of the high-pressure water heater 70, and the start-up water supply line 80. The start feed water flow rate control valve B8 and the start feed water flow rate control valve B9, the high pressure feed water line 85 connected from the outlet of the high pressure feed water heater 70 to the inlet of the economizer 11, and the high pressure feed water line 85 are provided. A high-pressure water supply system WLb having a economizer inlet valve B10, a first bypass pipe 80a that bypasses the start-up water supply flow control valve B8 and connects to the start-up water supply pipe 80, and the first bypass pipe A water supply bypass system WLb1 for activation having a water supply bypass valve for activation B8a composed of a needle valve provided at 80a, and a second bypass pipe connected to the high pressure water supply pipe 85 so as to bypass the economizer inlet valve B10. 5a, a water pressure test method for a high-pressure water supply system in a power generation facility provided with a economizer inlet bypass system WLb2 having an economizer inlet valve bypass valve B10a provided in the second bypass pipe 85a, The front feed water flow control valve B8 is closed, the start water feed bypass valve B8a comprising a needle valve is closed, the start feed water flow control valve B9 is opened, the economizer inlet valve B10 is closed, and the economizer inlet valve bypass valve B10a is closed. The start water supply bypass valve B8a is gradually opened in the open state, and after the start water supply bypass valve B8a is fully opened, the economizer inlet valve bypass valve B10a is gradually closed. And

  In this case, the start water supply flow rate adjustment valve B8 is closed, the start water supply bypass valve B8a consisting of a needle valve is closed, the start water supply flow rate adjustment valve B9 is opened, and the economizer inlet valve B10 is closed. Since the starting water supply bypass valve B8a is gradually opened while the inlet valve bypass valve B10a is opened, the economizer inlet valve bypass valve B10a is opened, so that the pressure is applied to the high-pressure water supply system in advance. A relief path is created, and the inside of the high-pressure water supply system WLb is gradually boosted by the small-diameter start-up water supply bypass valve B8a. Then, after the start water supply bypass valve B8a is fully opened, the economizer inlet valve bypass valve B10a is gradually closed, so that the high pressure water heater 70 provided in the high pressure water supply system WLb can be used as a high pressure heater. The pressure can be maintained at the increased pressure, that is, the pressure of the water pressure test without causing any trouble. That is, the water pressure test can be performed without damaging the high pressure heater of the high pressure feed water heater 70 and the like.

  As described above, according to the present invention, the start-up feed water flow rate control valve is closed, the start-up feed water bypass valve including the needle valve is closed, the start-up feed water flow rate control valve is opened, and the economizer inlet valve is closed. With the economizer inlet valve bypass valve open, gradually start the feedwater bypass valve for start-up, fully open the feedwater bypass valve for start-up, and then close the economizer inlet bypass valve gradually Therefore, the opening operation with the small-diameter feed water bypass valve prevents the water pressure of the boiler feed pump from being applied to the high-pressure water supply system at a stretch, and has the excellent effect of preventing damage to the high-pressure heater of the high-pressure feed water heater. obtain.

1 shows a schematic conceptual diagram of a thermal power generation facility according to an embodiment of the present invention. The detailed conceptual diagram mainly showing the high-pressure water supply system concerning the embodiment is shown. The figure which shows the structure of the high voltage | pressure water supply system in the boiler water supply apparatus which concerns on one Embodiment of this invention. The figure which shows the flow of the water pressure test method of the high voltage | pressure water supply system in the boiler water supply apparatus which concerns on one Embodiment of this invention.

  Hereinafter, a thermal power generation facility according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, such a thermal power generation facility includes a boiler 10 that heats water into steam, steam turbines 20, 21, 22, 23 driven by steam generated in the boiler 10, and the steam turbine 20. , 21, 22, 23 to generate electric power, and a condenser 40 for cooling the steam discharged from the steam turbines 20, 21, 22, 23 into water (saturated water), A boiler feed pump 50 that supplies water obtained by the condenser 40 to the boiler 10 and a circulation pump 65 that supplies cooling water to the condenser 40 are provided.

  That is, the thermal power generation facility 1 includes a condensate line WLa that connects the condenser 40 and the boiler feed pump 50, and a condensate line WLa so as to send the water obtained by the condenser 40 to the boiler feed pump 50. In order to supply water to the boiler 10, the high-pressure water supply system WLb connecting the boiler feed pump 50 and the boiler 10, and the steam generated in the boiler 10 are supplied to the steam turbines 20, 21, 22, and 23. , 21, 22, 23, a steam system SL that connects the boiler 10 and the condenser 40 via the steam turbines 20, 21, 22, 23, and a water source (this implementation) In order to send water of the sea) to the condenser 40, a circulation system RL that connects the water source and the condenser 40 is provided.

  As shown in FIG. 1 and FIG. 2, the boiler 10 further comprises a economizer 11 that heats water supplied from the high-pressure water supply system WLb, and water that is heated by the economizer 11 to generate saturated steam. A steam drum 12 to be collected, a superheater 13 that superheats saturated steam from the steam drum 12 to generate superheated steam, and a boiler circulation pump 14 that supplies water separated in the steam drum 12 to a downstream water drum 15. And a furnace 16 for adjusting the steam temperature of the steam drum 12 by heating the feed water having a temperature reduced in the water drum 15 and circulating it to the steam drum 12, and an evaporating turbine (described later). And a reheater 17 that superheats exhaust gas (steam) from the high pressure turbine 20.

  The steam drum 12 is provided with a separator (not shown) for separating steam and water. The superheater 13 includes a furnace wall radiant superheater 13a, a steam cooling wall superheater 13b, a horizontal superheater 13c, a low-temperature suspended superheater 13d, a partition radiant superheater 13e, and a plate superheater. 13f and a high-temperature suspended superheater 13g. These superheaters 13a to 13g are shown as NO. It is written as 1-7. The reheater 17 includes a furnace wall radiant reheater 17a and a suspended reheater 17b. These reheaters 17a and 17b are shown as NO. It is written as 1,2.

  And the boiler 10 which concerns on this embodiment supplies the steam superheated by the superheater 13 to the steam turbine (high pressure turbine) 20, and the steam superheated by the reheater 17 is another steam turbine (intermediate pressure turbine mentioned later). 21 is supplied.

  The thermal power generation facility 1 according to the present embodiment includes a high-pressure turbine 20, an intermediate-pressure turbine 21, and low-pressure turbines 22 and 23 as steam turbines 20, 21, 22, and 23. The high-pressure turbine 20 and the intermediate-pressure turbine 21 are One unit is provided, and two low-pressure turbines 22 and 23 are provided.

  The steam turbines 20, 21, 22, and 23 are arranged in series so that the output shafts of the high-pressure turbine 20, the intermediate-pressure turbine 21, and the low-pressure turbines 22 and 23 are coaxial with each other. It is connected to output shafts of adjacent steam turbines 20, 21, 22 and 23. The generator 30 is arranged side by side with respect to the steam turbines 20, 21, 22, and 23, and the input shaft is connected to the output shaft of the low-pressure turbine 23. Thereby, the generator 30 receives the drive of the high pressure turbine 20, the intermediate pressure turbine 21, and the low pressure turbines 22 and 23 to generate power.

  The condenser 40 cools the exhaust (steam) of the steam turbines 22 and 23 into water, and in this embodiment, steam from the steam turbines 22 and 23 (low-pressure turbines 22 and 23) is introduced. The steam introduced into the housing 400 is provided with a housing 400 that defines an internal space that is defined, and a cooling pipe (not shown) that is disposed in the housing 400 and that circulates the cooling water from the circulation system RL. Is indirectly cooled by cooling water in the cooling pipe, thereby condensing the steam into water. That is, the surface condenser is employ | adopted for the condenser 40 which concerns on this embodiment.

  Here, the systems WLa, WLb, SL, and RL will be described in detail. Each system WLa, WLb, SL, RL is divided based on the boiler 10, the condenser 40, and the boiler feed pump 50.

  The condensate system WLa is disposed downstream of the condensate pump 53 (between the condensate pump 53 and the boiler feed pump 50) and the water obtained by the condenser 40 and the steam turbines 20, 21, 22, 23. The condensate heat exchanger 54 that exchanges heat with the water used as the bearing cooling water, the hydrogen cooler 55 that cools the hydrogen gas of the generator 30, and the internal air to maintain the vacuum degree of the condenser 40 are used. Ejector 56 for extraction, ground condenser 57 for exchanging heat with the shaft seal steam of steam turbines 20, 21, 22, 23, low-pressure feed water heater 59 for heating water by extraction from steam turbines 20, 21, 22, 23, steam Is provided with a deaerator 60 or the like for directly heating water and physically separating and removing dissolved gas contained in the water. The low-pressure feed water heater 59 has first to third low-pressure heaters 59a to 59c.

  The high-pressure feed water system WLb includes a high-pressure feed water heater 70 that heats the water pumped out by the boiler feed pump 50 by extraction from the steam turbines 20, 21, 22, and 23. The high-pressure feed water heater 70 has fifth to seventh high-pressure heaters 70a to 70c. The high-pressure water supply system WLb will be described in detail later.

  The steam system SL is a first steam pipe that connects the superheater 13 in the boiler 10 and the intake side of the high-pressure turbine 20 on the assumption that the steam turbines 20, 21, 22, and 23 are arranged as described above. The second steam line SL2 connecting the path SL1, the exhaust side of the high-pressure turbine 20 and the intake side of the intermediate-pressure turbine 21; the third steam line connecting the exhaust side of the intermediate-pressure turbine 21 and the reheater 17 in the boiler 10; The steam line SL3, the fourth steam line SL4 connecting the reheater 17 in the boiler 10 and the intake side of the low pressure turbines 22, 23, the exhaust side of the low pressure turbines 22, 23, and the condenser 40 are connected. A fifth steam line SL5 is provided.

  The circulation system RL includes a water intake channel connected to a water source (the sea in the present embodiment), a circulation pump 65 that supplies cooling water taken from the water source to the water intake channel 82 to the condenser 40, and heat generated by the condenser 40. And a water discharge channel for returning the cooling water used for the exchange (steam cooling) to the water source. In this embodiment, the water source of the circulation system RL is the sea. However, depending on the location conditions of the power generation facility 1, the river may be used as the water source of the circulation system RL.

  Next, an operation method of the thermal power generation facility 1 according to the present embodiment will be described with reference to FIGS.

  First, the start-up operation for starting the operation of the thermal power generation facility 1 will be described. The thermal power generation facility 1 first drives the circulation system RL and then drives the condensate system WLa in the start-up operation to start the operation.

  Then, the boiler feed water pump 50 is driven to supply water from the condensate system WLa to the boiler 10. If it does so, water will accumulate in the boiler 10, and the water turns into a vapor | steam, and is supplied to steam system | strain SL (1st steam pipe line SL1). As a result, the steam turbines 20, 21, 22, 23 are driven to start the power generation by the generator 30, and the steam discharged from the steam turbines 20, 21, 22, 23 is sent to the condenser 40. .

And when the generator 30 starts electric power generation, transmission of the generated electric power will be started. Also,
The output of the generator 30 gradually increases to a preset output value.

  And since the output of the generator 30 will increase gradually, the amount of water corresponding to the output of the generator 30 (water of the condenser 40) is required, and the start water supply flow rate adjustment valve B9 is opened. Become. When the generator 30 rises to a certain value, the start water supply flow rate adjustment valve B9 is switched to the main water supply flow rate adjustment valve B12. That is, during normal operation, the start water supply flow rate control valve B9 and the start water supply flow rate control valve B8 are closed, and the main water flow rate control valve B12 and the main water flow rate control valve front valve B11 are opened.

  Next, the configuration of the high-pressure water supply system WLb in the boiler water supply apparatus will be described in detail with reference to FIG. The high-pressure water supply system WLb includes a start-up water supply line 80 connected from the outlet of the boiler water supply pump 50 to the inlet of the high-pressure water heater 70, and a start-up water supply flow rate control valve B8 provided in the start-up water supply line 80. And the start feed water flow rate control valve B9 and the outlet of the boiler feed pump 50 (in the start feed water conduit 80, before the start feed water bypass system WLb1, which will be described later) and branched to the high pressure feed water heater 70 (start up). A main water supply line 81 connected to the outlet of the water supply flow rate adjustment valve B9), a main water supply flow rate adjustment valve front valve B11 and a main water supply flow rate adjustment valve B12 provided in the main water supply line 81, and a high-pressure water supply heater 70 A high-pressure water supply pipe 85 connected from the outlet to the inlet of the economizer 11 and a economizer inlet valve B10 provided in the high-pressure water supply pipe 85 are provided. The high-pressure water supply system WLb is connected (connected) to the activation water supply line 80 so that the activation water supply flow rate control valve front valve B8 is bypassed (one end and the other end). The start water supply bypass system WLb1 including the start water supply bypass valve (manual needle valve) B8a provided in the first bypass pipe 80a and the economizer inlet valve B10 are bypassed (one end and the other end). A) a second bypass pipe 85a connected to (connected to) the high-pressure feed water pipe 85, and a boiler inlet bypass system WLb2 including the economizer inlet valve bypass valve B10a provided in the second bypass pipe 85a. I have.

  In the normal operation state, the main feed water flow rate control valve front valve B11, the main feed water flow rate control valve B12 and the economizer inlet valve B10 are opened, the start feed water flow rate control valve front valve B8, the start feed water flow rate control valve B9, The starting water supply bypass valve B8a and the economizer inlet valve bypass valve B10a are closed. In FIG. 3, an open one is denoted by ▽, and a closed one is denoted by ▼.

  Next, a water pressure test method for the high pressure water supply system WLb in the boiler water supply apparatus will be described with reference to FIG. First, the start water supply flow rate control valve B8 is closed, the start water supply flow rate control valve B9 is fully opened, it is confirmed that the start water supply bypass valve B8a is closed, and the economizer inlet valve B10 is set. In addition to closing, the economizer inlet valve bypass valve B10a is opened, for example, by two rotations (the full opening is about 5% open, so about 40% is opened), and a pressure escape path for the boiler feed pump 50 is created in advance. (S1). Next, one of the three boiler feed pumps 50 is started, while the other boiler feed pump (not shown) is put on standby (S2).

  Thereafter, the operation proceeds to a boosting operation (S3). That is, in the state where the economizer inlet valve bypass valve B10a is kept open by two rotations, the start water supply bypass valve (manual needle valve) B8a is rotated by, for example, 1/6, and finally, for example, fully opened (100% open). = 6 rotations open) (S31). That is, since this starting water supply bypass valve B8a is a needle valve and has a small diameter, the pressure of the boiler water supply pump 50 is not applied to the high-pressure water supply system WLb at a stretch. By gradually operating this, the inside of the high-pressure water supply system WLb can be raised or lowered to a desired pressure. Then, while maintaining the fully open state of the starting water supply bypass valve B8a, the economizer inlet valve bypass valve B10a is closed, for example, by 1/4, and finally, for example, 5/12 rotation open state (about 8% open) Then, the pressure of the seventh high-pressure heater 70c is set to 24 MPa (S32), and the pressure of the seventh heater 70c is confirmed by measuring with a test pressure gauge (not shown) (S33).

  Here, the pressure of the seventh high pressure heater 70c is held for 10 minutes, for example, and the temperatures of the deaerator 60, the fifth high pressure heater 70a, the sixth high pressure heater 70b, and the seventh high pressure heater 70c are measured (S4).

  Next, the operation proceeds to step-down operation (S5). That is, the starting water supply bypass valve B8a is closed by 1/6, for example, and fully closed (S51).

  Thereafter, the economizer inlet bypass valve B10a is opened by, for example, 1/2, so that the economizer inlet valve bypass valve B10a is, for example, in a state before the water pressure test (two rotations open), and the boiler feed pump 50 is stopped. (S52).

(Example)
Examples carried out based on the test method will be described.
As a precondition, one of the three boiler feed pumps 50 is started, and the remaining one boiler feed pump is put on standby as a backup. Further, the maximum stroke of the start-up water supply bypass valve B8a is 6 rotations, and the maximum stroke of the economizer inlet bypass valve B10a is 5 rotations and 3/12 rotations. Moreover, the water filling of the condensate system WLa, the water supply system WLb, and the boiler 10 is made into a completed state as advance preparation. Then, after completion of water filling, the air removal of the instrument is completed, and the temporary installation of the test pressure gauge (not shown) is completed.

  Before the water pressure test, in the state where the start water supply bypass valve B8a is fully closed and the economizer inlet bypass valve B10a is opened twice (S1), the pressure of the seventh high pressure heater 70c becomes 0.19, and the boiler water supply The pressure at the outlet of the pump 50 is 0.19 MPa.

  From this state, when one of the three boiler feed pumps 50 is activated (the remaining one boiler feed pump is on standby) (S2), the initial pressure of the seventh high-pressure heater 70c is 0.71. (Hereinafter referred to as a reference pressure value at the time of pressure increase), and the pressure increase amount is 0.52. At that time, a noise is generated from the economizer inlet bypass valve B10a. In this case, the outlet pressure of the boiler feed pump 50 is 25.61 MPa.

  After that, the operation proceeds to the pressure increasing operation (S3), and the fully-closed start-up water supply bypass valve B8a is opened by 1/6 at a time (pressure increasing operation), while the economizer inlet bypass valve B10a is kept open twice. (S31).

  When the starting water supply bypass valve B8a is rotated once, the pressure of the seventh high pressure heater 70c becomes 7.74, the increase from the reference pressure value becomes 7.03, and the water supply flow rate becomes 20.8. Become. When the starting water supply bypass valve B8a is rotated twice, the pressure of the seventh high-pressure heater 70c becomes 12.55, the pressure increase amount becomes 11.84, and the water supply flow rate becomes 30.4. When the start-up water supply bypass valve B8a is rotated three times, the pressure of the seventh high-pressure heater 70c becomes 14.17, the pressure increase amount becomes 13.46, and the water supply flow rate becomes 33.2. When the start water supply bypass valve B8a is rotated four times, the pressure of the seventh high pressure heater 70c becomes 14.53, the pressure increase amount becomes 13.82, and the water supply flow rate becomes 32.8. When the starting water supply bypass valve B8a is rotated five times, the pressure of the seventh high-pressure heater 70c becomes 14.55, the pressure increase amount becomes 13.84, and the water supply flow rate becomes 33.4.

  About 30 minutes after the boiler feed pump 50 is started, the start-up water supply bypass valve B8a is rotated six times and is fully opened. At this time, the pressure of the seventh high-pressure heater 70c becomes 14.62, the pressure increase amount becomes 13.89, and the feed water flow rate becomes 33.8.

  Then, the operation of closing the economizer inlet bypass valve B10a is started while maintaining the fully opened state of the start water supply bypass valve B8a. That is, the economizer inlet bypass valve B10a is closed by 1/4 from two rotations open (S32).

  When the economizer inlet bypass valve B10a is rotated once, the pressure of the seventh high-pressure heater 70c becomes 21.62, the pressure increase amount becomes 20.91, and the feed water flow rate becomes 14.1. When the economizer inlet bypass valve B10a is fully closed, the pressure of the seventh high pressure heater 70c becomes 23.77 (hereinafter referred to as a reference pressure value at the time of pressure reduction), and the pressure increase amount becomes 23.06. Thus, the feed water flow rate becomes 7.9.

  At this time, when the pressure of the seventh high-pressure heater 70c is measured with the test pressure gauge (S33), it shows about 24 MPa, this pressure is maintained for 10 minutes, the deaerator 60, the high-pressure water supply system (5th to 5th). When the temperature of the seventh high pressure heaters 70a to 70c) WLb is measured (S4), the deaerator 60 is 41 degrees, the fifth high pressure heater 70a is 48 degrees, the sixth high pressure heater 70b is 46.7 degrees, and the seventh high pressure The heater 70c shows 45.9 degrees, and no abnormality is observed.

  After the measurement, the process proceeds to a step-down operation (S5), and when the start-up water supply bypass valve B8a in the fully opened state is closed (step-down operation) (S51), the pressure of the seventh high-pressure heater 70c starts to gradually decrease. Then, when the starting water supply bypass valve B8a is rotated three times, the pressure of the seventh high-pressure heater 70c becomes 23.68, the pressure increase amount becomes 0.09, and the water supply flow rate becomes 7.7. When the starting water supply bypass valve B8a is rotated four times, the pressure of the seventh high-pressure heater 70c becomes 23.2, the pressure increase amount becomes -0.09, and the water supply flow rate becomes 7.7. When the starting water supply bypass valve B8a is rotated five times, the pressure of the seventh high-pressure heater 70c becomes 21.64, the pressure increase amount becomes -2.13, and the water supply flow rate becomes 3.6. When the starting water supply bypass valve B8a is fully closed, the pressure of the seventh high-pressure heater 70c becomes 6.56, the pressure increase amount becomes -17.21, and the water supply flow rate becomes 4.1.

  Thereafter, the economizer inlet bypass valve B10a is rotated by ¼ to bring the economizer inlet bypass valve B10a into a state in which the economizer inlet bypass valve B10a is opened twice, that is, the state before the water pressure test, and the boiler feed pump 50 is stopped (S52). ).

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.

  DESCRIPTION OF SYMBOLS 1 ... Thermal power generation equipment, 10 ... Boiler, 11 ... Carbon-saving device, 12 ... Steam drum, 13 ... Superheater, 13a ... Furnace wall radiation type superheater, 13b ... Steam cooling wall type superheater, 13c ... Horizontal type superheater , 13d ... low temperature suspended superheater, 13e ... partition radiant superheater, 13f ... plate type superheater, 13g ... high temperature suspended superheater, 14 ... boiler circulation pump, 15 ... water drum, 16 ... furnace, 17 ... reheater, 17a ... furnace wall radiant reheater, 17b ... suspended reheater, 20 ... high pressure turbine (steam turbine), 21 ... medium pressure turbine (steam turbine), 22, 23 ... low pressure turbine ( Steam turbine), 30 ... Generator, 40 ... Condenser, 50 ... Boiler feed pump, 53 ... Condensate pump, 54 ... Condensate heat exchanger, 55 ... Hydrogen cooler, 56 ... Ejector, 57 ... Ground condenser, 59 ... Low pressure water heater, 59a-59c 1st-3rd low pressure heater, 60 ... deaerator, 65 ... circulation pump, 70 ... high pressure feed water heater, 70a-70c ... 5th-7th high pressure heater, 80 ... feed water line for starting, 80a ... 1st Detour pipe, 81 ... main water supply pipe, 85 ... high pressure water supply pipe, 85a ... second bypass pipe, 400 ... housing, B8 ... front water supply flow control valve, B8a ... start water supply bypass valve (needle) Valve), B9 ... start-up feed water flow rate control valve, B10 ... economizer inlet valve, B10a ... economizer inlet valve bypass valve, B11 ... main feed water flow rate control valve front valve, B12 ... main feed water flow rate control valve, WLa ... Condensate system, WLb ... high pressure water supply system, SL ... steam system, SL1 ... first steam line, SL2 ... second steam line, SL3 ... third steam line, SL4 ... fourth steam line, SL5 ... first 5 steam lines, RL ... circulation system, WLb1 Start-up water supply bypass system, WLb2 ... economizer inlet bypass system

Claims (1)

A starting water supply pipe (80) connected from the outlet of the boiler feed pump (50) to the inlet of the high pressure feed water heater (70), and a starting feed water flow rate regulating valve provided in the starting water supply pipe (80) (B8), the starting feed water flow rate adjustment valve (B9), the high pressure feed water line (85) connected from the outlet of the high pressure feed water heater (70) to the inlet of the economizer (11), the high pressure feed water pipe (85) A high pressure water supply system (WLb) having a economizer inlet valve (B10) provided in
A first bypass pipe (80a) connected to the startup water supply pipe (80) so as to bypass the front valve (B8) for starting the supply water flow rate adjustment valve, and the startup provided in the first bypass pipe (80a) A starting water supply bypass system (WLb1) having a water supply bypass valve (B8a);
A second detour pipe (85a) connected to the high pressure water supply pipe (85) so as to bypass the economizer inlet valve (B10), and a economizer inlet valve provided in the second detour pipe (85a) A water pressure test method for a high-pressure water supply system in a power generation facility including a economizer inlet bypass system (WLb2) having a bypass valve (B10a),
Close the start feed water flow rate control valve (B8), close the start feed water bypass valve (B8a) consisting of a needle valve, open the start feed water flow rate control valve (B9), and open the economizer inlet valve (B10). Closed, with the economizer inlet valve bypass valve (B10a) opened, gradually open the start water supply bypass valve (B8a),
A water pressure test method for a high pressure water supply system in a power generation facility, wherein the starter water supply bypass valve (B8a) is fully opened and then the economizer inlet valve bypass valve (B10a) is gradually closed.

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