Emergency starting system for drum feed pump

Abstract

The utility model discloses a kind of emergency starting system of drum feed pump, comprising: emergency starting loop and emergency setting loop;First electric control device, first electric control device includes the first input end and second input end of alternative conduction, first input end is connected with the start control circuit of the control system of drum feed pump, and second input end is connected with emergency starting loop;Second electric control device, second electric control device includes the third input end and fourth input end of alternative conduction, third input end is connected with the frequency setting circuit of control system, and fourth input end is connected with emergency setting loop;The output end of first electric control device is connected with the frequency converter of drum feed pump, and the output end of second electric control device is connected with frequency converter.It can be seen, redundancy control is realized by first electric control device and second electric control device, in the case of the control system failure of drum feed pump, make drum feed pump continue to be in working condition, enhance the sustained water supply capacity of drum feed pump.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling production technology, and in particular to an emergency start system for a steam drum feedwater pump. Background Technology

[0002] The steam drum feedwater pump is responsible for supplying water to the steam drum to maintain the dynamic balance between steam and water inside the steam drum, so that the steam drum can normally recover the waste heat of high-temperature flue gas and generate steam.

[0003] In existing technologies, steam drum feedwater pumps typically employ a single control system to achieve start-up, shutdown, and frequency regulation. When the control system fails, the steam drum feedwater pump cannot operate normally, often requiring a rapid repair of the control system to restore control. However, this cannot meet the demand for continuous water supply from the steam drum feedwater pump, placing the steam drum at operational risk. Therefore, how to ensure continuous water supply from the steam drum feedwater pump during control system failures is a pressing technical problem that needs to be solved. Utility Model Content

[0004] This application provides an emergency start system for a steam drum feedwater pump, which solves the technical problem in the prior art that the continuous water supply to the steam drum feedwater pump cannot be met when the control system fails, and achieves the technical effect of ensuring continuous water supply to the steam drum feedwater pump when the control system fails.

[0005] In a first aspect, this application provides an emergency start system for a steam drum feedwater pump, comprising:

[0006] Emergency start-up circuit and emergency set-in circuit;

[0007] The first electronic control device includes a first input terminal and a second input terminal that can be selectively turned on. The first input terminal is connected to the start control circuit of the control system of the steam drum feedwater pump, and the second input terminal is connected to the emergency start circuit.

[0008] The second electronic control device includes a third input terminal and a fourth input terminal that can be selectively turned on. The third input terminal is connected to the frequency setting line of the control system, and the fourth input terminal is connected to the emergency setting circuit.

[0009] The output of the first electronic control device is connected to the frequency converter of the steam drum feedwater pump, and the output of the second electronic control device is connected to the frequency converter.

[0010] In some embodiments of this application, based on the aforementioned scheme, the normally open contact of the first electronic control device is connected to the start control circuit as the first input terminal, and the normally closed contact of the first electronic control device is connected to the emergency start circuit as the second input terminal.

[0011] The normally open contact of the second electronic control device is connected to the frequency setting line as the third input terminal, and the normally closed contact of the second electronic control device is connected to the emergency setting circuit as the fourth input terminal.

[0012] In some embodiments of this application, based on the aforementioned scheme, both the first and second electronic control devices are relays.

[0013] In some embodiments of this application, based on the aforementioned scheme, the coil of the first electronic control device is electrically connected to the control system of the steam drum feedwater pump, and the coil of the second electronic control device is electrically connected to the control system.

[0014] In some embodiments of this application, based on the foregoing scheme, the system further includes:

[0015] Emergency start switch, which is connected to the emergency start circuit;

[0016] Emergency setpoint switch, which is connected to the emergency setpoint circuit.

[0017] In some embodiments of this application, based on the foregoing scheme, the system further includes:

[0018] The emergency device cabinet, emergency start switch and emergency set switch are all installed on the panel of the emergency device cabinet;

[0019] The water pump frequency converter cabinet contains the first electrical control device, the second electrical control device, and the frequency converter.

[0020] In some embodiments of this application, based on the foregoing solution, the emergency device cabinet further includes:

[0021] Indicator lights, at least one, are provided. Each indicator light is located on the panel and connected to the motor of the steam drum feed water pump.

[0022] In some embodiments of this application, based on the foregoing solution, the emergency device cabinet further includes:

[0023] The indicator control device corresponds one-to-one with the indicator light, and each indicator light is connected to the motor through the corresponding indicator control device.

[0024] In some embodiments of this application, based on the aforementioned scheme, the emergency given circuit includes a frequency transmission module, the output frequency of which is 35Hz.

[0025] In some embodiments of this application, based on the aforementioned scheme, multiple steam drum feedwater pumps, emergency start circuits, emergency set-point circuits, first electronic control devices, and second electronic control devices are provided, and the steam drum feedwater pumps, emergency start circuits, emergency set-point circuits, first electronic control devices, and second electronic control devices correspond one-to-one.

[0026] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0027] This application provides an emergency start system for a steam drum feedwater pump, comprising: an emergency start circuit and an emergency setpoint circuit; a first electronic control device, which includes a first input terminal and a second input terminal that are selectively connected, the first input terminal being connected to the start control circuit of the steam drum feedwater pump control system, and the second input terminal being connected to the emergency start circuit; a second electronic control device, which includes a third input terminal and a fourth input terminal that are selectively connected, the third input terminal being connected to the frequency setpoint circuit of the control system, and the fourth input terminal being connected to the emergency setpoint circuit; the output terminal of the first electronic control device is connected to the frequency converter of the steam drum feedwater pump, and the output terminal of the second electronic control device is connected to the frequency converter.

[0028] As can be seen, the embodiments of this application achieve redundant control through the first and second electronic control devices. In the event of a failure in the control system of the steam drum feedwater pump, the mechanical characteristic of selective conduction of the electronic control devices enables the frequency converter to be connected to the corresponding emergency line in a timely manner, transmitting the emergency start signal from the emergency start circuit and the emergency frequency signal from the emergency setpoint circuit, so that the steam drum feedwater pump continues to operate, enhancing the continuous water supply capacity of the steam drum feedwater pump and avoiding the risk of steam drum explosion caused by the failure of a single control system in the traditional technology. This enhances the safety of the equipment in the industrial production environment. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram illustrating the structural principle of an emergency start system for a steam drum feedwater pump provided in this application embodiment;

[0031] Figure 2 This is a schematic diagram of the structure of a first electronic control device provided in an embodiment of this application;

[0032] Figure 3 A schematic diagram of the panel of an emergency device cabinet provided in an embodiment of this application;

[0033] In the above diagram: 1. Emergency device cabinet; 11. Emergency start switch; 12. Emergency setpoint switch; 13. Indicator light; 131. First indicator light; 132. Second indicator light; 133. Third indicator light; 2. Feedwater pump frequency converter cabinet; 21. First electrical control device; 211. First input terminal; 212. Second input terminal; 22. Second electrical control device; 23. Frequency converter; 31. Start-up control circuit; 32. Frequency setpoint circuit; 41. Emergency start circuit; 42. Emergency setpoint circuit; 51. Motor; 52. Steam drum feedwater pump. Detailed Implementation

[0034] This application provides an emergency start system for a steam drum feedwater pump, which solves the technical problem in the prior art where the continuous water supply to the steam drum feedwater pump cannot be met when the control system fails.

[0035] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0036] This application provides an emergency start system for a steam drum feedwater pump, comprising: an emergency start circuit and an emergency setpoint circuit; a first electronic control device, which includes a first input terminal and a second input terminal that are selectively connected, the first input terminal being connected to the start control circuit of the steam drum feedwater pump control system, and the second input terminal being connected to the emergency start circuit; a second electronic control device, which includes a third input terminal and a fourth input terminal that are selectively connected, the third input terminal being connected to the frequency setpoint circuit of the control system, and the fourth input terminal being connected to the emergency setpoint circuit; the output terminal of the first electronic control device is connected to the frequency converter of the steam drum feedwater pump, and the output terminal of the second electronic control device is connected to the frequency converter.

[0037] As can be seen, the embodiments of this application achieve redundant control through the first and second electronic control devices. In the event of a failure in the control system of the steam drum feedwater pump, the mechanical characteristic of selective conduction of the electronic control devices enables the frequency converter to be connected to the corresponding emergency line in a timely manner, transmitting the emergency start signal from the emergency start circuit and the emergency frequency signal from the emergency setpoint circuit, so that the steam drum feedwater pump continues to operate, enhancing the continuous water supply capacity of the steam drum feedwater pump and avoiding the risk of steam drum explosion caused by the failure of a single control system in the traditional technology. This enhances the safety of the equipment in the industrial production environment.

[0038] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0039] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0041] It should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] It should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] As a key pressure vessel in industrial production systems, the steam drum plays a crucial role in recovering waste heat from high-temperature flue gas to generate steam. Its safe operation is highly dependent on the dynamic balance between internal steam and water. The steam drum feedwater pump, as the core equipment for maintaining water level balance, traditionally relies entirely on the programmable logic controller (PLC) in the control system for start-up, shutdown, and frequency regulation, forming a single control path.

[0044] However, when the programmable logic controller (PLC) in the control system malfunctions due to hardware failure, program errors, or power outages, causing the boiler drum feedwater pump to lose its remote and local start-up capabilities, operators cannot restore water supply in a timely manner using any backup methods. At this point, the continuously evaporating water level in the boiler drum cannot be replenished, rapidly leading to a severe water shortage, inducing deformation or even cracking of the pressure vessel structure, and in extreme cases, potentially causing catastrophic accidents such as boiler tube rupture. Conventional solutions require significant time to repair the control system or replace the PLC, failing to meet the real-time requirements for safe boiler drum operation and exposing the system to substantial operational risks.

[0045] To address the aforementioned problems, this application provides an emergency start system for a steam drum feedwater pump. For example... Figure 1 The diagram shown is a schematic diagram of the structural principle of an emergency start system for a steam drum feedwater pump provided in an embodiment of this application, including a first electronic control device 21, a second electronic control device 22, an emergency start circuit 41, and an emergency setpoint circuit 42.

[0046] The first electronic control device 21 includes a first input terminal 211 and a second input terminal 212 that can be selectively turned on. The first input terminal 211 is connected to the start control circuit 31 of the control system (not shown in the figure) of the steam drum feedwater pump 52, and the second input terminal 212 is connected to the emergency start circuit 41.

[0047] The second electronic control device 22 includes a third input terminal and a fourth input terminal that can be selectively turned on. The third input terminal is connected to the frequency setting line 32 of the control system, and the fourth input terminal is connected to the emergency setting circuit 42.

[0048] The output terminal of the first electronic control device 21 is connected to the frequency converter 23 of the steam drum feed water pump 52, and the output terminal of the second electronic control device 22 is connected to the frequency converter 23.

[0049] "Selective conduction" means that the first electronic control device 21 can only conduct the first input terminal 211 to the output terminal or the second input terminal 212 to the output terminal, and the second electronic control device 22 can only conduct the third input terminal to the output terminal or the fourth input terminal to the output terminal.

[0050] For example, such as Figure 2 The diagram shown is a structural schematic of a first electronic control device 21 provided in an embodiment of this application. The first input terminal 211 is connected to the start control circuit 31, the second input terminal 212 is connected to the emergency start circuit 41, and the output terminal is connected to the frequency converter 23. It is understood that the structure of the second electronic control device 22 is similar to that of the first electronic control device 21, differing only in the connection relationships of its input terminals. Those skilled in the art can refer to the structure of the first electronic control device 21 to understand the structure of the second electronic control device 22.

[0051] Furthermore, the first electronic control device 21 and the second electronic control device 22 can achieve physical isolation and automatic switching of the two input terminals to selectively conduct through the mechanical interlocking characteristics of the contacts.

[0052] Specifically, the normally open contact of the first electronic control device 21 is connected to the start control circuit 31, and the normally closed contact of the first electronic control device 21 is connected to the emergency start circuit 41. The normally open contact of the second electronic control device 22 is connected to the frequency setting circuit 32, and the normally closed contact of the second electronic control device 22 is connected to the emergency setting circuit 42.

[0053] The conduction of normally open and normally closed contacts can be controlled by coils. The coil of the first electronic control device 21 is electrically connected to the control system (usually a PLC control system) of the steam drum feedwater pump 52, and the coil of the second electronic control device 22 is electrically connected to the control system.

[0054] When the control system is in normal operating condition, it can output voltage to the coil of the first electronic control device 21 and the coil of the second electronic control device 22, causing the coils to be energized and attracted. This, in turn, controls the normally open contacts of the first electronic control device 21 and the normally closed contacts of the second electronic control device 22 to close and open. That is, the first electronic control device 21 is connected to the start control circuit 31, receives and outputs a normal start signal from the control system to the frequency converter 23, and the second electronic control device 22 is connected to the frequency setting circuit 32, receives and outputs a normal frequency signal from the control system to the frequency converter 23.

[0055] When the control system is in a faulty state, it cannot output voltage to the coils of the first electronic control device 21 and the second electronic control device 22. The coils are de-energized and released, thereby controlling the normally open contacts of the first and second electronic control devices 21 to open and the normally closed contacts to close. That is, the first electronic control device 21 is connected to the emergency start circuit 41, receiving and outputting an emergency start signal from the emergency start circuit 41 to the frequency converter 23; the second electronic control device 22 is connected to the emergency setpoint circuit 42, receiving and outputting an emergency frequency signal from the emergency setpoint circuit 42 to the frequency converter 23.

[0056] Understandably, the start control line 31 and the frequency setting line 32 are used to transmit normal start signals and normal frequency signals from the control system.

[0057] Furthermore, the emergency control circuit 42 includes a frequency transmission module (not shown in the figure) for outputting an emergency frequency signal. The output frequency of the emergency frequency signal is set according to the normal operating conditions of the frequency converter 23 and the steam drum feedwater pump 52. For example, the output frequency of the frequency transmission module is 35Hz.

[0058] For example, both the first electronic control device 21 and the second electronic control device 22 are relays. The first electronic control device 21, the second electronic control device 22 and the frequency converter 23 are all installed inside the water pump frequency converter cabinet 2 to directly realize signal transmission to the frequency converter 23.

[0059] Furthermore, the system also includes an emergency device cabinet 1. The panel of the emergency device cabinet 1 is equipped with an emergency start switch 11, an emergency set switch 12, and at least one indicator light 13. The emergency device cabinet 1 is equipped with an indicator control device, which corresponds one-to-one with the indicator light 13. Each indicator light 13 is connected to the motor 51 through the corresponding indicator control device.

[0060] For example, such as Figure 3 The diagram shown is a schematic of the panel of an emergency device cabinet 1 provided in an embodiment of this application, including a first indicator light 131, a second indicator light 132, a third indicator light 133, an emergency start switch 11, and an emergency setpoint switch 12. The emergency device cabinet 1 internally includes a first indicating electronic control device (not shown in the figure), a second indicating electronic control device (not shown in the figure), and a third indicating electronic control device (not shown in the figure).

[0061] Emergency start switch 11 is connected to emergency start circuit 41, and emergency set switch 12 is connected to emergency set circuit 42. Both emergency start switch 11 and emergency set switch 12 are configured as two-position changeover switches, each including an ON position and an OFF position.

[0062] When the emergency start switch 11 is toggled to the ON position, the emergency start circuit 41 is activated, enabling the transmission of an emergency start signal to the first electronic control device 21. When the emergency start switch 11 is toggled to the OFF position, the emergency start circuit 41 is deactivated, preventing the transmission of an emergency start signal to the first electronic control device 21. When the emergency setpoint switch 12 is toggled to the ON position, the emergency setpoint circuit 42 is activated, enabling the transmission of an emergency frequency signal to the second electronic control device 22. When the emergency setpoint switch 12 is toggled to the OFF position, the emergency setpoint circuit 42 is deactivated, preventing the transmission of an emergency frequency signal to the second electronic control device 22.

[0063] The emergency start switch 11 and the emergency set switch 12 are two-position changeover switches to realize emergency intervention of start and frequency, which facilitates the operator's control of emergency operations and improves the efficiency of accident response.

[0064] The first indicator light 131 is used to indicate that the steam drum feedwater pump 52 is operating normally. Specifically, the first indicator light 131 is connected to the motor 51 through the first indicating electronic control device. When the motor 51 is in normal operating condition, the first indicating electronic control device is energized, and the first indicator light 131 (e.g., green) lights up.

[0065] The second indicator light 132 is used to indicate that the steam drum feedwater pump 52 is ready to run. Specifically, the second indicator light 132 is connected to the motor 51 through a second indicating electronic control device. When the motor 51 is in the ready state, the second indicating electronic control device is energized, and the second indicator light 132 (e.g., yellow) lights up.

[0066] The third indicator light 133 is used to indicate a malfunction in the steam drum feedwater pump 52. Specifically, the third indicator light 133 is connected to the motor 51 via a third indicating electronic control device. When the motor 51 is in a faulty state, the third indicating electronic control device is energized, and the third indicator light 133 (e.g., red) lights up.

[0067] For example, the first, second, and third indicating electronic control devices are all relays. By using independent relays to isolate and drive the three-color indicator lights 13, the status of the steam drum feedwater pump 52 is accurately reflected under its respective operating conditions, reducing the risk of misjudgment.

[0068] Furthermore, multiple steam drum feedwater pumps 52, emergency start circuits 41, emergency set-point circuits 42, first electronic control devices 21, and second electronic control devices 22 are provided, with each of the steam drum feedwater pumps 52, emergency start circuits 41, emergency set-point circuits 42, first electronic control devices 21, and second electronic control devices 22 corresponding to one another.

[0069] For example, the steam drum feedwater pump 52 includes a first steam drum feedwater pump 52 and a second steam drum feedwater pump 52, the emergency device cabinet 1 includes a first emergency device cabinet 1 and a second emergency device cabinet 1, and the feedwater pump frequency converter cabinet 2 includes a first feedwater pump frequency converter cabinet 2 and a second feedwater pump frequency converter cabinet 2.

[0070] The first boiler drum feedwater pump 52 and the second boiler drum feedwater pump 52 can share a control system. In the event of a failure in the control system, both the emergency start switch 11 and the emergency set switch 12 on the first emergency device cabinet 1 are switched to the ON position, so that the first electrical control device 21 in the first feedwater pump inverter cabinet 2 is connected to the corresponding emergency start circuit 41, and the second electrical control device 22 in the first feedwater pump inverter cabinet 2 is connected to the corresponding emergency set circuit 42, thereby enabling the first boiler drum feedwater pump 52 to continue to work and meet the water supply demand.

[0071] When the first boiler drum feedwater pump 52 fails, both the emergency start switch 11 and the emergency set switch 12 on the second emergency device cabinet 1 are switched to the ON position, so that the first electrical control device 21 in the second feedwater pump inverter cabinet 2 is connected to the corresponding emergency start circuit 41, and the second electrical control device 22 in the second feedwater pump inverter cabinet 2 is connected to the corresponding emergency set circuit 42, so that the second boiler drum feedwater pump 52 starts to work and continues to meet the water supply demand.

[0072] In summary, this application provides an emergency start system for a steam drum feedwater pump, comprising: an emergency start circuit 41 and an emergency setpoint circuit 42; a first electronic control device 21, which includes a first input terminal 211 and a second input terminal 212 that are selectively connected, the first input terminal 211 being connected to the start control circuit 31 of the control system of the steam drum feedwater pump 52, and the second input terminal 212 being connected to the emergency start circuit 41; a second electronic control device 22, which includes a third input terminal and a fourth input terminal that are selectively connected, the third input terminal being connected to the frequency setpoint circuit 32 of the control system, and the fourth input terminal being connected to the emergency setpoint circuit 42; and the output terminal of the first electronic control device 21 being connected to the frequency converter 23 of the steam drum feedwater pump 52, and the output terminal of the second electronic control device 22 being connected to the frequency converter 23.

[0073] As can be seen, the embodiments of this application achieve redundant control through the first electronic control device 21 and the second electronic control device 22. In the event of a failure in the control system of the steam drum feedwater pump 52, the inverter 23 can be connected to the corresponding emergency line in a timely manner by relying on the mechanical characteristic of selective conduction of the electronic control device. This transmits the emergency start signal from the emergency start circuit 41 and the emergency frequency signal from the emergency setpoint circuit 42, so that the steam drum feedwater pump 52 continues to work, enhancing the continuous water supply capacity of the steam drum feedwater pump 52. This avoids the risk of steam drum explosion caused by the failure of a single control system in the traditional technology, and enhances the safety of the equipment in the industrial production environment.

[0074] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0075] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An emergency start system for a steam drum feedwater pump, characterized in that, include: Emergency start-up circuit and emergency set-in circuit; The first electronic control device includes a first input terminal and a second input terminal that can be selectively turned on. The first input terminal is connected to the start control circuit of the control system of the steam drum feedwater pump, and the second input terminal is connected to the emergency start circuit. The second electronic control device includes a third input terminal and a fourth input terminal that can be selectively turned on. The third input terminal is connected to the frequency setting line of the control system, and the fourth input terminal is connected to the emergency setting circuit. The output terminal of the first electronic control device is connected to the frequency converter of the steam drum feedwater pump, and the output terminal of the second electronic control device is connected to the frequency converter.

2. The emergency start system for the steam drum feedwater pump as described in claim 1, characterized in that, The normally open contact of the first electronic control device is connected to the start control circuit as the first input terminal, and the normally closed contact of the first electronic control device is connected to the emergency start circuit as the second input terminal. The normally open contact of the second electronic control device is connected to the frequency setting line as the third input terminal, and the normally closed contact of the second electronic control device is connected to the emergency setting circuit as the fourth input terminal.

3. The emergency start system for the steam drum feedwater pump as described in claim 1 or 2, characterized in that, Both the first and second electronic control devices are relays.

4. The emergency start system for the steam drum feedwater pump as described in claim 1, characterized in that, The coil of the first electronic control device is electrically connected to the control system of the steam drum feedwater pump, and the coil of the second electronic control device is electrically connected to the control system.

5. The emergency start system for the steam drum feedwater pump as described in claim 1, characterized in that, The system also includes: An emergency start switch, which is connected to the emergency start circuit; An emergency setpoint switch is connected to the emergency setpoint circuit.

6. The emergency start system for the steam drum feedwater pump as described in claim 5, characterized in that, The system also includes: The emergency device cabinet has both the emergency start switch and the emergency set switch installed on its panel. The water pump frequency converter cabinet is provided, and the first electronic control device, the second electronic control device, and the frequency converter are all installed inside the water pump frequency converter cabinet.

7. The emergency start system for the steam drum feedwater pump as described in claim 6, characterized in that, The emergency device cabinet also includes: Indicator lights, at least one of which is provided, each of which is arranged on the panel and connected to the motor of the steam drum feedwater pump.

8. The emergency start system for the steam drum feedwater pump as described in claim 7, characterized in that, The emergency device cabinet also includes: The indicator control device corresponds one-to-one with the indicator light, and each indicator light is connected to the motor through the corresponding indicator control device.

9. The emergency start system for the steam drum feedwater pump as described in claim 1, characterized in that, The emergency given circuit includes a frequency transmission module, the output frequency of which is 35Hz.

10. The emergency start system for the steam drum feedwater pump as described in claim 1, characterized in that, Multiple versions of the steam drum feedwater pump, the emergency start circuit, the emergency set circuit, the first electronic control device, and the second electronic control device are provided, and each of the steam drum feedwater pump, the emergency start circuit, the emergency set circuit, the first electronic control device, and the second electronic control device corresponds to another one.

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