JP5142547B2 - Neutralizer injection device power supply switching method - Google Patents

Description

  The present invention relates to a method for switching the power supply of a neutralizing agent injection apparatus for injecting a neutralizing agent (for example, ammonia) used when processing nitrogen content contained in flue gas in a thermal power plant or the like. It is about.

  In general, in a thermal power plant, combustion of fuel (oil or coal) is burned by a boiler to generate steam, and a turbine is driven by this steam to generate power. The combustion exhaust gas (smoke) discharged from the boiler during combustion is guided to a denitration device where nitrogen oxides are removed, and then dust is collected by an electric dust collector. Thereafter, the combustion exhaust gas is guided to a desulfurization device, where sulfur oxides are removed and discharged from the chimney to the atmosphere.

  When removing nitrogen oxides from combustion exhaust gas, a neutralizing agent such as ammonia is supplied from a neutralizer injection device (for example, an ammonia device) to the denitration device, thereby denitrating the combustion exhaust gas. . In addition, neutralizing agent is supplied to the electrostatic precipitator from the neutralizing agent injection device to reduce the influence of sulfur oxide on the electrostatic precipitator (to prevent corrosion of the electrostatic precipitator due to sulfur oxide). ing). Further, the desulfurizer is also supplied with the neutralizer from the neutralizer injector, and the sulfur oxide in the combustion exhaust gas is removed by the desulfurizer.

  Incidentally, a thermal power plant is generally provided with a plurality of power generation facilities, and a combustion system exists corresponding to each power generation facility. And corresponding to each power generation facility, that is, corresponding to each combustion system, the above-described denitration device, electrostatic precipitator, and desulfurization device are provided. Each combustion system is provided with a neutralizing agent injection device.

  In the following description, there are Unit 1 and Unit 2 as power generation facilities, there is a first neutralizer injection device (for example, an ammonia device) corresponding to Unit 1, and a second unit corresponding to Unit 2. There shall be a neutralizer injection device. The first neutralizing agent injection device is, for example, a 30-ton ammonia device, and the second neutralizing agent injection device is a 10-ton ammonia device.

In a thermal power plant, it is necessary to periodically check various facilities. When a 30-ton ammonia device is being inspected, ammonia is temporarily supplied from the 10-ton ammonia device to the first unit. In addition, the thing of patent document 1 is known as a boiler flue gas processing equipment, for example.
Japanese Patent Laid-Open No. 2002-162020

  As described above, when the 30-ton ammonia device corresponding to Unit 1 is under inspection, ammonia is supplied from the 10-ton ammonia device corresponding to Unit 2 to Unit 1, but the 10-ton ammonia device Is driven by the on-site power supply for Unit 2, so if a power outage or the like occurs at this on-site power supply, power is not supplied to the 10-ton ammonia device and the 10-ton ammonia device stops. Arise.

  For example, Unit 1 and Unit 2 may have different periodic inspection cycles. Unit 1 is currently inspecting a 30-ton ammonia system, but Unit 2 is inspecting another facility. It may be. In such a case, if the emergency C / C for Unit 2 is blacked out by switching the in-house power supply or the like, the 10-ton ammonia device will be stopped. As a result, denitration is not performed even though Unit 1 is in operation.

  Thus, in a thermal power plant having a plurality of power generation facilities, during the inspection of the neutralizer injection device corresponding to one power generation facility, this one power generation from the neutralizer injection device corresponding to another power generation facility. Neutralizing agent will be supplied to the facility, but when the emergency C / C is cut off due to power switching or the like in another power generation facility, the neutralizing agent injection device corresponding to the other power generation facility stops. Therefore, there is a problem that the neutralizing agent is not supplied to the one power generation facility.

  Accordingly, an object of the present invention is to provide a neutralizing agent injection apparatus power switching method that can prevent erroneous operation and perform power switching in the event of a power failure, and can avoid a situation where a neutralizing agent is not supplied. There is.

The present invention includes a plurality of power plants that each generate power in response to combustion in a boiler device, and a neutralizing agent that injects ammonia when processing the combustion exhaust gas discharged from the boiler device for each power plant An injection device is provided, and when there occurs a situation in which the neutralizing agent injection device in one of the power generation plants is stopped, the neutralization agent injection device in another power generation plant out of the power generation plant in power plant so as to supply the ammonia to the power plant, a power failure in the different power plant from the neutralization agent injection device in the supply of the ammonia of the to one power plant in the another power plant occurs The neutralizer injection device power supply is switched to supply power to the neutralizer injection device in the another power plant. A power supply switching switch for switching between one power plant side power source and another power plant side power source is provided, and neutralization in the other power plant according to confirmation of power failure in the other power plant A first step of confirming whether or not the agent injection device is in a manual / start-up state, and the middle of the other power plant by the power switch according to confirmation of the power source voltage of the one power plant side power source. And a second step of connecting the one power plant side power source to the sump injection device.

  The neutralizing agent injection apparatus power supply switching method according to the present invention is characterized in that the neutralizing agent injection apparatus of the another power plant includes a shutoff valve that blocks a flow of a substance flowing through the neutralizing agent injection apparatus, and the neutralizing agent. An adjustment valve that controls the operating state of the injection device manually or automatically, and when the second step is performed, the shutoff valve of the neutralizing agent injection device in the another power plant is opened. And a fourth step of automatically adjusting the control valve of the neutralizing agent injection device in the another power plant.

  The power supply switching method of the neutralizing agent injection apparatus according to the present invention is configured such that when the power supply voltage of the power source on the other power plant side is confirmed in response to power restoration at the power plant, the power switch is switched by the power switch. A fifth step of connecting the other power plant side power source to the neutralizer injecting device in FIG. 5 and the neutralizer injecting device in the other power plant in response to the fifth step being performed. The sixth step is to open the shut-off valve in the second state, and the seventh step is to automatically set the adjustment valve of the neutralizer injection device in the other power plant.

  In the present invention, it is preferable that the third step, the fourth step, the sixth step, and the seventh step are executed in accordance with predetermined check items.

  As described above, according to the present invention, according to confirmation of a power failure in another power plant, it is confirmed whether or not another neutralizer injection device is in a manual / start-up state. According to the confirmation of the power supply voltage, one power plant side power supply is connected to the neutralizer injecting device in another power plant by the power switch, thus preventing erroneous operation and switching the power supply appropriately in the event of a power failure There is an effect that can be performed.

  In the present invention, after the power supply is switched, the shutoff valve of the neutralizing agent injection device in another power plant is opened, and the adjustment valve of the neutralizing agent injection device in another power plant is automatically set. Therefore, the neutralizer injection device is not adversely affected by switching the power source.

  According to the present invention, when the power supply voltage of another power plant side power source is confirmed in response to power restoration in another power plant, another power plant is connected to the neutralizing agent injection device in another power plant by the power switch. Since the side power supply was connected, and then the shutoff valve of the neutralizing agent injection device in another power plant was opened, and the adjustment valve of the neutralizing agent injection device in another power plant was made automatic. Power supply can be restored properly.

  Next, an example of the method of switching the neutralizer injection device power supply according to the embodiment of the present invention will be described. Here, an ammonia apparatus using ammonia as a neutralizing agent will be described as an example. Generally, a thermal power plant is provided with a plurality of thermal power plants. In the present embodiment, it is assumed that the thermal power plant has a No. 1 thermal power plant (hereinafter simply referred to as Unit 1) and a No. 2 thermal power plant (hereinafter simply referred to as Unit 2). The same applies to a case where a plurality of thermal power plants are provided.

  FIG. 1 is a diagram showing the main part of the first unit (note that although not shown, the second unit has the same configuration as the first unit), and a boiler 12 is defined in the boiler device 11. In the flue (combustion exhaust gas passage) 13 continuing to the furnace 12, a secondary superheater 14, a first reheater 15, a primary superheater 16, a second reheater 17, And the economizer 18 is arrange | positioned. The flue 13 is connected to the chimney 23 via a denitration device 19, an air preheater 20, an electrostatic precipitator 21, and a desulfurization device 22.

  On the other hand, an exhaust gas recirculation duct 24 is connected to the flue 13 between the economizer 18 and the denitration device 19, and the exhaust gas recirculation duct 24 is connected to the bottom of the furnace 12. An exhaust gas recirculation fan (GRF) 25 is disposed in the exhaust gas recirculation duct 24, and a furnace hopper damper (furnace damper) 26 is disposed near the bottom of the furnace 12.

  As shown in the figure, a ventilation duct 27 is connected to the furnace 12 through the air preheater 20, and air is sent to the furnace 12 through the ventilation duct 27 by a forced air blower (FDF) 28. Further, on the downstream side of the air preheater 20, the ventilation duct 27 is connected to the exhaust gas recirculation duct 24 via a bypass duct 29. An exhaust gas recirculation booster fan (GRBF) 30 is disposed in the bypass duct 29, and the bypass duct 29 is connected to the exhaust gas recirculation duct 24 between the GRF 25 and the furnace hopper damper 26.

  The aforementioned economizer 18 is supplied with condensate (water) from the condenser, and this economizer 18 is connected to the primary superheater 16 via a furnace water wall (furnace water cooling wall) 31. The primary superheater 16 is connected to the secondary superheater 14, and the secondary superheater 14 is connected to a high-pressure turbine (HP) 32. The second reheater 17 is connected to the high pressure turbine 32, the first reheater 15 is connected to the second reheater 17, and the first reheater 15 is connected to the intermediate pressure turbine (IP ) 33.

  The steam that has passed through the intermediate pressure turbine 33 is given to the low pressure turbine 34, and the steam that has passed through the low pressure turbine 34 is cooled by seawater in the condenser 35 to become condensed water (water) (condensed). . Separately, water (pure water) is supplied to the condenser 35, and the condensed water is supplied from the condenser 35 to the aforementioned economizer 18. Further, a generator 36 is connected to the turbine shaft, and the generator 36 is driven by the rotational drive of the turbine shaft to generate power.

  In the boiler device 11, fuel (for example, petroleum) is supplied from the fuel pipe 37 to the furnace 12, air preheated by the air preheater 20 from the ventilation duct 27 is supplied to the furnace 12, and fuel burns in the furnace 12. The flue gas generated by the combustion of the fuel is discharged through the flue 13. At this time, the condensate is overheated and heated by the economizer 18, the primary superheater 16, and the secondary superheater 14. The steam is supplied to the high pressure turbine 32.

  That is, the condensate supplied from the condenser 35 is heated by the economizer 18, then passes through the furnace water cooling wall 31, reaches the primary superheater 16, where it is primarily superheated and primary superheated steam. It becomes. The primary heating steam is sent to the secondary superheater 14 and further heated to be supplied to the high pressure turbine 32 as superheated steam (secondary heating steam).

  The steam that has passed through the high-pressure turbine 32 is sent to the second reheater 17, where it is reheated and then reheated by the first reheater 15, and is reheated as intermediate pressure. It is sent to the turbine 33. And the steam which passed the intermediate pressure turbine 33 is sent to the low pressure turbine 34, and the generator 36 is driven by the drive of these turbines.

  On the other hand, the combustion exhaust gas that has passed through the economizer 18 is denitrated in the denitration device 19 and then preheats the air that passes through the ventilation duct 27 in the air preheater 20. Then, after dust and the like in the combustion exhaust gas are collected by the electric dust collector 21, desulfurization is performed by the desulfurization device 22 and discharged from the chimney 23.

Referring also to FIG. 2, although not shown in FIG. 1, an ammonia device 41 is connected to the denitration device 19, the electrostatic precipitator 21, and the desulfurization device 22, and ammonia (NH ₃ ) is removed from the ammonia device 41. electrostatic precipitator 21, and is supplied to the desulfurizer 22 (likewise, unit 2 of the denitration apparatus, electrostatic precipitator, and ammonia is supplied from a separate ammonia device in the desulfurization apparatus. in the following description Is called the first ammonia device (30 ton ammonia device) and the second ammonia device is called the second ammonia device (10 ton ammonia device)).

  By the way, various inspections such as periodic inspections are performed on the various facilities of Unit 1 and Unit 2. For example, during inspection of the first ammonia device 41, it is desirable that Unit 1 is in operation. For this reason, ammonia is temporarily supplied to the first machine from a second ammonia device (not shown in FIG. 2). On the other hand, since Unit 1 and Unit 2 are independent, if the emergency C / C for Unit 2 is blacked out due to the switching of the on-site power source related to Unit 2, etc., the second ammonia device will stop. As a result, there occurs a situation in which denitration or the like is not performed even though Unit 1 is in operation.

  In order to prevent such inconvenience, the power supply is switched as follows. FIG. 3 is a diagram showing a power supply system (power supply circuit) 43 of the second ammonia device 42. As shown in the figure, the power supply circuit 43 is connected to a power supply panel (control panel) 45 via a power supply switch 44. Yes. Power is supplied to the power supply panel 45, and the first power supply path 46, which is an output from the power supply panel 45, is used as the first machine side power supply path, and the second power supply path 47 is used as the second machine side power supply path.

  In a normal case (that is, when the emergency C / C for Unit 2 is in an energized state), the power supply circuit 43 is connected to the second power supply by the power supply switch 44 (provided in the control panel of the second ammonia device 42). The power is supplied to the power supply circuit 43 via the second power supply path 47, and the second ammonia device 42 is operated. In this state, if the emergency C / C for Unit 2 fails, the second ammonia device 42 stops, so the power supply circuit 43 is quickly switched to the first power supply path 46.

  Here, referring also to FIG. 4, in the central control room (not shown) of the power plant, Units 1 and 2 are monitored by a monitor (for example, CRT). Then, it is confirmed on the monitor whether or not the second ammonia device 42 is in the manual / starting state (step S1). If it is not in the manual / starting state, the second ammonia device 42 is set in the manual / starting state (step S2).

  At this time, monitoring personnel for each unit (equipment) of Unit 1 and Unit 2 are arranged in the central control room, and central confirmation and communication personnel are also arranged for the common DDC. Furthermore, in the field (the second ammonia device 42), corresponding operation / contact personnel and power supply switching operation personnel are arranged, and emergency bypass operation personnel are arranged.

  Subsequently, in the power supply changeover switch 44, the power supply voltage of the first power supply path 46 is confirmed by a tester (step S3), and the start of the power supply changeover operation is notified from the site to the central control room (step S4). Thereafter, an operation place changeover switch (not shown) on the control panel of the second ammonia device 42 is switched to the site (Step S5: At the time of an instantaneous power failure, all the shut-off valves are closed due to power interruption, so the opening operation is performed. Will be prepared for).

  Then, the power switch 44 is switched from the second power path 47 to the first power path 46 (that is, the first power path 46 and the power circuit 43 are connected by the power switch 44 (step S6)). At this time, since each regulating valve (CV) is under control, the power source switching is executed at a point where the vaporizer pressure CV is near the minimum opening degree, for example, in consideration of the influence at the time of power source switching.

  Subsequently, the subsequent operation is executed with reference to the check sheet shown in FIG. As shown in FIG. 5, this check sheet is provided with a check device column, a state change column, an operation column, and a check column, and an operator performs an operation using the check sheet. When switching the power supply, the operator confirms that the display of the control power supply on the control panel is temporarily turned off by the check sheet (step S7).

  Further, referring to the check sheet, the vaporizer inlet cutoff valve, the ammonia gas cutoff valve, and the vaporizer vapor cutoff valve are opened in the control panel (step S8). At this time, if each shut-off valve cannot be opened, the restoration operation is performed after the bypass valve is opened on site.

  Next, the operator checks whether the vaporizer pressure CV, the accumulator pressure CV, and the vaporizer temperature CV are turned off or manually, and switches to automatic and confirms the display (step S9). That is, the operator confirms that the carburetor pressure CV, the accumulator pressure CV, and the carburetor temperature CV are automatic and that there is no change in the parameters before switching (note that the controller display is turned off at the moment of power failure, After recovery (power recovery), it will return to its original state, so check that there is no abnormality, and if it is manual as described above, check the display and operate automatically).

  Thereafter, on the control panel, the operation place changeover switch is switched to the central control room (step S10), and it is confirmed by the monitor in the central control room that the ammonia device (ammonia injection device) is in the manual / starting state (step S11). After confirming this, when it is confirmed in the central control room that there is no effect on the first and second units (step S12), the power switching operation is terminated after the operation from the site to the central control room is completed. .

  The operation when the emergency C / C for Unit 2 is restored will be described with reference to FIG. First, the operator checks the power supply voltage of the second power supply path 47 with a tester at the power supply switch 44 of the control panel of the second ammonia device 42 (step P1), and then switches the power supply from the site to the central control room. The start of operation is notified (step P2). Thereafter, the operation place changeover switch on the control panel of the second ammonia device 42 is changed over to the site (Step P3: In the event of an instantaneous power failure, all the shutoff valves are closed due to power interruption, so the switchover is performed in preparation for the opening operation. Will be.)

  Then, the power switch 44 is switched from the first power path 46 to the second power path 47 (that is, the second power path 47 and the power circuit 43 are connected by the power switch 44 (step P4)). At this time, since each regulating valve (CV) is under control, the power source switching is executed at a point where the vaporizer pressure CV is near the minimum opening degree, for example, in consideration of the influence at the time of power source switching. Subsequently, steps S7 to S12 described with reference to FIG. 4 are executed in step P5, and the power recovery operation is terminated.

  In this way, in the present embodiment, the operation of switching the power to the Unit 1 power supply is performed in the event of a power failure of Unit 2 while confirming the state of each shut-off valve and each CV on the check sheet. There is an effect that it is possible to eliminate the influence on the units of Unit 1 and Unit 2 due to an erroneous operation and to reduce the burden on the operator. That is, there is an effect that it is possible to avoid a situation in which ammonia is not supplied because it is possible to switch the power supply in the event of a power failure without any erroneous operation.

  In the above-described embodiment, the example in which the operator switches the changeover switch on-site while monitoring the state of Unit 1 and Unit 2 in the central control room has been described, but with a computer (or a control program that operates on the computer) The power supply switching control described above may be executed.

  FIG. 7 is a diagram illustrating an example of a computer that performs power supply switching control. Each functional block illustrated in FIG. 7 may be part of a control program. The computer 50 is disposed, for example, in a central control room, and a power supply monitoring unit 51 that monitors the power supply voltage of the first power supply path 46 and the second power supply path 47 and a first switch that switches an operation place changeover switch. A switch switching unit 52, a second switch switching unit 53 for switching the power supply switching switch, and a valve monitoring / control unit 54 for monitoring the states of the control power supply, each shut-off valve, and each CV and executing the operation of each valve And a manual / startup monitoring unit 55 for monitoring whether the second ammonia device is in a manual / startup state.

  In the central control room, when a power supply switching command is given to the computer 50, the manual / startup monitoring unit 55 checks whether the second ammonia device 42 is in the manual / startup state, and performs manual / startup. If it is in the state, the power supply monitoring unit 51 subsequently checks the power supply voltage of the first power supply path 46 in the power supply changeover switch 44.

  After that, when the first switch switching unit 52 switches the operation location switching switch 57 of the control panel of the second ammonia device 42 to the site, the second switch switching unit 53 controls the power supply switching switch 44 to control the second switch. The power supply path 47 is switched to the first power supply path 46. At this time, the monitoring / control unit 54 such as the valve monitors the point where the vaporizer pressure CV is close to the minimum opening degree in consideration of the influence at the time of switching the power source, and at this point, the second switch switching unit 53 switches the power source. Execute.

  Subsequently, the valve monitoring / control unit 54 confirms that the display of the control power supply of the control panel is temporarily turned off, and opens the vaporizer inlet shutoff valve, the ammonia gas shutoff valve, and the vaporizer steam shutoff valve. At this time, if each shut-off valve cannot be opened, the valve monitoring / control unit 54 opens the bypass valve.

  Next, the valve monitoring / control unit 54 checks whether the carburetor pressure CV, the accumulator pressure CV, and the carburetor temperature CV are turned off or manually, and switches to automatic and confirms the display. Subsequently, after the first switch switching unit 52 switches the operation place switching switch of the control panel to the central control room, the manual / startup monitoring unit 55 confirms that the second ammonia device is in the manual / startup state. Then, the power switching control is finished.

  Similarly, when the emergency C / C for Unit 2 is restored, if a power supply restoration command is given to the computer 50, the power supply monitoring unit 51 confirms the power supply voltage of the second power supply path 47 in the power supply changeover switch 44. The first switch switching unit 52 switches the operation place changeover switch of the control panel of the second ammonia device 42 to the site.

  Then, the second switch switching unit 53 switches the power switch 44 from the first power path 46 to the second power path 47. Thereafter, in the same manner as the power supply switching control described above, the computer executes power supply restoration replacement control.

  In the above description, the example in which the computer 50 performs the power switching control or the power recovery control when the power switching command or the power recovery command is given to the computer 50 has been described. However, the computer 50 is indicated by a broken line block in FIG. A power failure monitoring unit 56 is provided, and the power failure monitoring unit 56 monitors the energization state (that is, power failure) of the emergency C / C for Unit 2, and performs power switching control or power recovery control in accordance with this. Also good.

  Moreover, although the thermal power plant was demonstrated in the above-mentioned example, if it is a power plant provided with the neutralizing agent injection | pouring apparatus in order to process the combustion exhaust gas from a boiler apparatus, it can apply similarly.

It is a figure which shows an example of the principal part of the thermal power plant in which the neutralizing agent injection | pouring apparatus power supply switching method by embodiment of this invention is used. It is a block diagram which shows the supply path | route of ammonia by the ammonia apparatus used with the thermal power plant shown in FIG. It is a circuit diagram which shows an example of the power supply circuit of an ammonia apparatus. It is a flowchart for demonstrating the power supply switching operation in the neutralizer injection apparatus power supply switching method by embodiment of this invention. It is a figure which shows an example of the check sheet | seat used by the power supply switching operation shown in FIG. It is a flowchart for demonstrating the power supply recovery operation in the neutralizer injection apparatus power supply switching method by embodiment of this invention. It is a functional block diagram of a computer which implement | achieves the power supply switching operation and power supply restoration operation which were demonstrated in FIG.4 and FIG.6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Boiler apparatus 12 Furnace 13 Flue 14 Secondary superheater 15 1st reheater 16 1st superheater 17 2nd reheater 18 Carbon-saving device 19 Denitration apparatus 20 Air preheater 21 Electric dust collector 22 Desulfurization apparatus 23 Chimney 24 Exhaust gas recirculation duct 25 Exhaust gas recirculation fan (GRF)
26 Furnace hopper damper (furnace damper)
27 Ventilation duct 28 Pushing ventilator (FDF)
29 Bypass duct 30 Exhaust gas recirculation booster fan (GRBF)
31 Furnace water wall (furnace water wall)
32 High-pressure turbine (HP)
33 Medium pressure turbine (IP)
34 Low pressure turbine (LP)
35 Condenser 36 Generator 37 Fuel Pipe 41, 42 Ammonia Device 43 Power System (Power Circuit)
44 Power switch 45 Power panel (control panel)
46, 47 Power supply path 51 Power supply monitoring unit 52, 53 Switch switching unit 54 Valve monitoring / control unit 55 Manual / start-up monitoring unit 56 Power failure monitoring unit

Claims (4)

Each of the power generation plants has a plurality of power generation plants that generate power in response to combustion in the boiler device, and includes a neutralizing agent injection device that injects ammonia when processing the combustion exhaust gas discharged from the boiler device for each power generation plant. When the situation of stopping the neutralizing agent injection device in one power plant among the power generation plants occurs, the neutralizing agent injection device in another power generation plant from the power generation plant to the one power generation plant wherein the power plant so as to supply the ammonia when the power failure in the different power plant from the neutralization agent injection device in the supply of the ammonia of the to one power plant in the another power plant occurs A method for switching a neutralizer injection device power supply for supplying power to the neutralizer injection device in another power plant. Te,
A power source switch for switching between one power plant side power source and another power plant side power source is provided,
A first step of confirming whether or not the neutralizing agent injection device in the another power plant is in a manual / activated state in response to confirmation of a power failure in the another power plant;
A second step of connecting the one power plant side power source to the neutralizing agent injection device in the other power plant by the power switch according to the confirmation of the power source voltage of the one power plant side power source; A neutralizer injection apparatus power supply switching method characterized by comprising: The neutralizing agent injection device of the another power plant includes a shut-off valve that blocks a flow of a substance flowing through the neutralizing agent injection device, and an adjustment that controls an operation state of the neutralizing agent injection device manually or automatically. With a valve,
A third step of opening a shutoff valve of the neutralizing agent injector in the another power plant in response to the second step being performed;
The neutralizing agent injecting apparatus power source switching method according to claim 1, further comprising a fourth step of automatically adjusting a regulating valve of the neutralizing agent injecting apparatus in the another power plant. When the power supply voltage of the other power plant side power source is confirmed in response to the restoration of the power source in the other power plant, the other power plant is connected to the neutralizer injection device in the other power plant by the power switch A fifth step of connecting the side power supply;
A sixth step of opening a shutoff valve of the neutralizer injection device in the another power plant in response to the fifth step being performed;
The neutralizing agent injector power switching method according to claim 2, further comprising a seventh step of automatically adjusting a control valve of the neutralizer injector in the other power plant.   4. The third step, the fourth step, the sixth step, and the seventh step are executed in accordance with a predetermined check item. A method for switching the power of a Japanese medicine injection device

Images