Steam-driven feedwater pump anti-false tripping control device and steam-driven feedwater pump control system

Abstract

The present application discloses a steam-driven feedwater pump anti-false tripping control device and a steam-driven feedwater pump control system, comprising a first solenoid valve group, a second solenoid valve group, a first unloading valve, a second unloading valve and a controller, wherein the control ends of the first solenoid valve group and the second solenoid valve group are electrically connected to the control end of the controller, the input end and the output end of the first solenoid valve group are respectively connected to the first fire-resistant oil branch and the input end of the second solenoid valve group, the output end of the second solenoid valve group is connected to the fire-resistant oil circuit, the output end and the control end of the first unloading valve are respectively connected to the output end and the input end of the first solenoid valve group, the input end of the first unloading valve and the input end of the second unloading valve are respectively connected to the second fire-resistant oil branch, the main steam valve of the steam-driven feedwater pump and the supplementary steam valve of the steam-driven feedwater pump, and the output end and the control end of the second unloading valve are respectively connected to the output end and the input end of the second solenoid valve group. The possibility of false tripping of the steam-driven feedwater pump is reduced, and the stability of the unit operation is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water supply pumps, and in particular relates to a steam-driven water supply pump anti-false tripping control device and a steam-driven water supply pump control system. Background Art

[0002] Large units in thermal power plants usually use electric feedwater pumps and steam-driven feedwater pumps to add water to the boiler. Electric feedwater pumps use the power of the plant to drive the motor to rotate, thereby driving the feedwater pump to rotate and deliver the feedwater to the boiler side. Steam-driven feedwater pumps use steam extracted from the steam turbine to drive a small steam turbine, thereby driving the water pump to rotate and deliver the feedwater to the boiler side.

[0003] The main steam valve of the steam-driven feed water pump is provided with a steam-driven feed water pump main steam valve and a steam-driven feed water pump supplementary steam valve. The main steam valve of the steam-driven feed water pump and the steam-driven feed water pump supplementary steam valve are connected to two shutdown solenoid valves on the fire-resistant oil branch line. When any of the shutdown solenoid valves loses power, the quick-closing components on the main steam valve of the steam-driven feed water pump and the steam-driven feed water pump supplementary steam valve will be actuated, so that the main steam valve of the steam-driven feed water pump and the steam-driven feed water pump supplementary steam valve will be quickly closed, causing the steam-driven feed water pump to trip.

[0004] This connection method has the following hidden dangers: if any shutdown solenoid valve fails or the power supply of the tripping circuit of any shutdown solenoid valve is lost, the main steam valve and the supplementary steam valve of the steam-driven feedwater pump will be quickly closed. The closing of the main steam valve and the supplementary steam valve will cause the steam-driven feedwater pump to trip erroneously, resulting in low feedwater flow, causing the boiler main fuel to trip and the unit to trip, posing a great safety risk to the unit. Summary of the invention

[0005] In view of this, the present invention provides a steam-driven feedwater pump anti-false tripping control device and a steam-driven feedwater pump control system, the main purpose of which is to solve the problem of false tripping of steam-driven feedwater pumps in thermal power plants.

[0006] In order to solve the above problems, the present application provides a steam-driven feedwater pump anti-false tripping control device, the steam-driven feedwater pump anti-false tripping control device comprises a first solenoid valve group, a second solenoid valve group, a first unloading valve, a second unloading valve and a controller, wherein:

[0007] The control end of the first solenoid valve group is electrically connected to the first control end of the controller, the input end of the first solenoid valve group is connected to the first fire-resistant oil branch, the output end of the first solenoid valve group is connected to the input end of the second solenoid valve group, the output end of the second solenoid valve group is connected to the fire-resistant oil circuit, the control end of the second solenoid valve group is electrically connected to the second control end of the controller, the input end of the first unloading valve is respectively connected to the second fire-resistant oil branch, the main steam valve of the steam-driven feed water pump and the supplementary steam valve of the steam-driven feed water pump, the output end of the first unloading valve is connected to the output end of the first solenoid valve group, the control end of the first unloading valve is connected to the input end of the first solenoid valve group, the input end of the second unloading valve is respectively connected to the second fire-resistant oil branch, the main steam valve of the steam-driven feed water pump and the supplementary steam valve of the steam-driven feed water pump, the output end of the second unloading valve is connected to the output end of the second solenoid valve group, and the control end of the second unloading valve is connected to the input end of the second solenoid valve group.

[0008] In one embodiment of the present invention, optionally, the first solenoid valve group includes a first solenoid valve and a second solenoid valve, and the first solenoid valve and the second solenoid valve are connected in parallel.

[0009] In one embodiment of the present invention, optionally, the second solenoid valve group includes a third solenoid valve and a fourth solenoid valve, and the third solenoid valve and the fourth solenoid valve are connected in parallel.

[0010] In one embodiment of the present invention, optionally, when at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group lose power at the same time, the main steam valve of the steam-driven feedwater pump and the supplementary steam valve of the steam-driven feedwater pump are closed.

[0011] In one embodiment of the present invention, optionally, the main steam valve of the steam-driven feed water pump is provided with a first fast-closing component, and the supplementary steam valve of the steam-driven feed water pump is provided with a second fast-closing component.

[0012] In one embodiment of the present invention, optionally, the pneumatic water supply pump anti-false tripping control device also includes a first quick-close branch and a second quick-close branch, the first end of the first quick-close branch is connected to the first quick-close component, the second end of the first quick-close branch is connected to the second anti-fire oil branch, the first end of the second quick-close branch is connected to the second quick-close component, and the second end of the second quick-close branch is connected to the second anti-fire oil branch.

[0013] In one embodiment of the present invention, optionally, a pressure sensor is provided between the output end of the first solenoid valve group and the input end of the second solenoid valve group.

[0014] In one embodiment of the present invention, optionally, the pneumatic water supply pump anti-false tripping control device also includes: an oil tank, an oil pump and a fire-resistant oil main line, the oil pump is arranged in the oil tank, the oil pump is connected to the fire-resistant oil main line, the fire-resistant oil main line is also connected to the first fire-resistant oil branch line and the second fire-resistant oil branch line, and the oil tank is also connected to the fire-resistant oil circuit.

[0015] In one embodiment of the present invention, optionally, the main steam valve of the steam-driven feed-water pump and the supplementary steam valve of the steam-driven feed-water pump are both connected to the steam-driven feed-water pump.

[0016] The present invention also provides a steam-driven water supply pump control system, comprising the above-mentioned steam-driven water supply pump anti-false operation tripping control device.

[0017] The beneficial effects of the present application: a steam-driven feedwater pump anti-false tripping control device and a steam-driven feedwater pump control system provided by the present invention are provided with a first solenoid valve group and a second solenoid valve group. Only when at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group lose power at the same time, the main steam valve and the supplementary steam valve of the steam-driven feedwater pump are closed, and then the steam-driven feedwater pump trips, thereby reducing the possibility of false tripping of the steam-driven feedwater pump and improving the stability of the unit operation.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0020] Figure 1 It is a structural block diagram of a steam-driven feedwater pump anti-false tripping control device according to an exemplary embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a first solenoid valve group and a second solenoid valve group of a steam-driven feedwater pump anti-false tripping control device according to an exemplary embodiment of the present invention;

[0022] in,

[0023] Figure 1-Figure 2The numbers are as follows: 11-first solenoid valve group, 12-second solenoid valve group, 13-first unloading valve, 14-second unloading valve; 15-controller; 20-first fire-resistant oil branch; 30-fire-resistant oil circuit source; 40-second fire-resistant oil branch; 50-steam-driven feedwater pump main steam valve; 60-steam-driven feedwater pump supplementary steam valve; 111-first solenoid valve; 112-second solenoid valve; 121-third solenoid valve; 122-fourth solenoid valve. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0026] Combine the following Figure 1 to Figure 2 A pneumatic feedwater pump anti-false tripping control device according to some embodiments of the present invention is described.

[0027] In one embodiment, Figure 1 As shown, a steam-driven feedwater pump anti-false tripping control device comprises a first solenoid valve group 11, a second solenoid valve group 12, a first unloading valve 13, a second unloading valve 14 and a controller 15, wherein the control end of the first solenoid valve group 11 is electrically connected to the first control end of the controller 15, the input end of the first solenoid valve group 11 is connected to the first anti-fuel branch 20, the output end of the first solenoid valve group 11 is connected to the input end of the second solenoid valve group 12, the output end of the second solenoid valve group 12 is connected to the anti-fuel circuit 30, the control end of the second solenoid valve group 12 is electrically connected to the second control end of the controller 15, and the first unloading valve 13 is electrically connected to the second control end of the controller 15. The input end of the load valve 13 is respectively connected to the second fire-resistant oil branch 40, the main steam valve 50 of the steam-driven feed water pump and the supplementary steam valve 60 of the steam-driven feed water pump, the output end of the first unloading valve 13 is connected to the output end of the first solenoid valve group 11, the control end of the first unloading valve 13 is connected to the input end of the first solenoid valve group 11, the input end of the second unloading valve 14 is respectively connected to the second fire-resistant oil branch 40, the main steam valve 50 of the steam-driven feed water pump and the supplementary steam valve 60 of the steam-driven feed water pump, the output end of the second unloading valve 14 is connected to the output end of the second solenoid valve group 12, and the control end of the second unloading valve 14 is connected to the input end of the second solenoid valve group 12.

[0028] Specifically, when at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group lose power at the same time, the solenoid valves in the first solenoid valve group are connected, and the oil in the first anti-fuel branch flows into the input end of the second solenoid valve group via the connected solenoid valves in the first solenoid valve group, so that the oil pressure at the control end of the first unloading valve is reduced, the first unloading valve is connected, and the oil in the second anti-fuel branch flows to the input end of the second solenoid valve group via the first unloading valve. Since the solenoid valves in the second solenoid valve group are connected, the oil flowing out of the first solenoid valve group flows into the anti-fuel circuit via the connected solenoid valves in the second solenoid valve group, so that the oil pressure at the control end of the second unloading valve is reduced, and then the second unloading valve is connected, and the oil in the second anti-fuel branch flows to the anti-fuel circuit via the second unloading valve. The oil pressure of the second anti-fuel branch is relatively low, so that the main steam valve of the steam-driven feed water pump and the supplementary steam valve of the steam-driven feed water pump are closed, and further the steam-driven feed water pump trips.

[0029] Compared with the prior art, the steam-driven feedwater pump anti-false tripping control device provided by the present invention is provided with a first solenoid valve group and a second solenoid valve group. Only when at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group lose power at the same time, the main steam valve and the supplementary steam valve of the steam-driven feedwater pump are closed, and then the steam-driven feedwater pump trips, thereby reducing the possibility of false tripping of the steam-driven feedwater pump and improving the stability of the unit operation.

[0030] 5 In one embodiment, Figure 2 As shown, the first solenoid valve group 11 includes a first solenoid valve 111 and a second solenoid valve 112, which are connected in parallel, and the second solenoid valve group 12 includes a third solenoid valve 121 and a fourth solenoid valve 122, which are connected in parallel. When at least one solenoid valve in the first solenoid valve group 11 and at least one solenoid valve in the second solenoid valve group 12 lose power at the same time, the main steam valve 51 of the pneumatic feed water pump and the supplementary steam valve 60 of the pneumatic feed water pump are closed.

[0031] Specifically, if the first solenoid valve and the second solenoid valve are both closed, no matter what state the third solenoid valve and the fourth solenoid valve are in, the main steam valve and the supplementary steam valve of the steam-driven feedwater pump are both open. Take the first solenoid valve as an example to explain the principle. The first solenoid valve is closed when it is energized, that is, the solenoid valve is closed.

[0032] When the valve is energized, the oil at the input end of the solenoid valve cannot flow to the output end, and can only be retained in the 5th pipeline where the input end is located. Since the input ends of the first solenoid valve and the second solenoid valve are both connected to the control end of the first unloading valve, the pressure at the control end of the first unloading valve is relatively large. Since the control end of the first unloading valve is similar to the connecting rod of a piston, when the pressure is large, the piston is pushed downward, causing the piston to block the output end of the first unloading valve. Therefore, the first unloading valve is in a closed state. Since the input end of the first unloading valve is connected to the first anti-fuel oil branch, the oil pressure in the first anti-fuel oil branch is relatively high, thereby causing the main steam valve of the steam-driven feed water pump and the supplementary steam valve of the steam-driven feed water pump connected to the input end of the first unloading valve to be subjected to relatively large oil pressure and to be in a closed connection.

[0033] When at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group loses power at the same time, the solenoid valve in the first solenoid valve group is connected, and the oil in the first fire-resistant oil branch flows to the input end of the second solenoid valve group through the solenoid valve in the first solenoid valve group, so that the oil pressure at the control end of the first unloading valve is reduced, the first unloading valve is connected, and the oil in the second fire-resistant oil branch flows to the input end of the second solenoid valve group through the first unloading valve.

[0034] The oil flowing out of the first solenoid valve group flows into the anti-fire oil circuit through the solenoid valve in the second solenoid valve group, so that the oil pressure at the control end of the second unloading valve is reduced, the second unloading valve is connected, and the second anti-fire oil circuit is connected.

[0035] The oil in the oil branch flows to the fire-resistant oil circuit through the second unloading valve, making the oil pressure of the second fire-resistant oil branch lower, so that the main steam valve and the supplementary steam valve of the steam-driven feed water pump are closed, further causing the steam-driven feed water pump to trip.

[0036] The solenoid valve group in the prior art adopts a 2-to-1 method, which is prone to malfunction. The solenoid valve group in this application adopts a 4-to-2 method, which reduces the possibility of malfunction of the steam-driven water pump tripping and improves the stability of the unit operation.

[0037] In one embodiment, the main steam valve of the steam-driven feedwater pump is provided with a first speed closing component, the supplementary steam valve of the steam-driven feedwater pump is provided with a second speed closing component, and the control device for preventing malfunction tripping of the steam-driven feedwater pump further includes a first speed closing component.

[0038] The first end of the first speed-closing branch is connected to the first speed-closing component, the second end of the 0th speed-closing branch is connected to the second anti-fuel branch, the first end of the second speed-closing branch is connected to the second speed-closing component, and the second end of the second speed-closing branch is connected to the second anti-fuel branch.

[0039] Specifically, the first quick-closing assembly is connected to the second fire-resistant oil branch through the first quick-closing branch, the second quick-closing assembly is connected to the second fire-resistant oil branch through the second quick-closing branch, and the output of the first unloading valve

[0040] The inlet end and the input end of the second unloading valve are both connected to the second fire-resistant oil branch. When the first unloading valve and the second unloading valve are both in the closed state, the oil pressure in the second fire-resistant oil branch, the first speed-off branch and the second speed-off branch is relatively high, and the first speed-off component and the second speed-off component are opened; when the first unloading valve and the second unloading valve are both in the connected state, that is, in the pressure relief and bypass state, the oil in the first fire-resistant oil branch, the first speed-off branch and the second speed-off branch flows to the fire-resistant oil circuit, and the oil pressure in the second fire-resistant oil branch, the first speed-off branch and the second speed-off branch is relatively low, so that the first speed-off component and the second speed-off component are closed, and further the steam-driven water supply pump is tripped.

[0041] In one embodiment, a pressure sensor is provided between the output end of the first solenoid valve group 11 and the input end of the second solenoid valve group 12 .

[0042] Specifically, the pressure sensor detects the oil pressure in the pipeline. The oil pressure usually detected is about half of the oil pressure in the second fire-resistant oil branch. The detected oil pressure is used to monitor the quality of the solenoid valve or to perform unit trip channel tests.

[0043] In one embodiment, the pneumatic water supply pump anti-false tripping control device also includes: an oil tank, an oil pump and a fire-resistant oil main line. The oil pump is arranged in the oil tank, the oil pump is connected to the fire-resistant oil main line, the fire-resistant oil main line is also connected to the first fire-resistant oil branch line 20 and the second fire-resistant oil branch line 40, and the oil tank is also connected to the fire-resistant oil circuit 30.

[0044] In this embodiment, it should be noted that the main anti-fuel oil circuit is relatively complex. In order to clearly describe the position and connection relationship of the first anti-fuel oil branch circuit and the second anti-fuel oil branch circuit, the main anti-fuel oil circuit is simplified here. The oil output by the oil pump goes to the main anti-fuel oil circuit, and the main anti-fuel oil circuit performs a lot of processing on the oil, which will not be repeated here. The processed oil flows into the first anti-fuel oil branch circuit and the second anti-fuel oil branch circuit respectively. When at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group loses power at the same time, the two solenoid valves are connected, and the pressure at the control end of the first unloading valve and the second unloading valve is reduced, so that the first unloading valve and the second unloading valve are also connected. The oil in the first anti-fuel oil branch circuit flows to the anti-fuel oil circuit through the connected solenoid valves, and the oil in the second anti-fuel oil branch circuit flows to the anti-fuel oil circuit through the first unloading valve and the second unloading valve.

[0045] In one embodiment, the steam-driven feedwater pump main steam valve 50 and the steam-driven feedwater pump supplementary steam valve 60 are both connected to the steam-driven feedwater pump.

[0046] Specifically, the steam-driven feed water pump is provided with a main steam valve and a supplementary steam valve. The main steam valve of the steam-driven feed water pump is connected to the main steam valve on the feed water pump, and the supplementary steam valve of the steam-driven feed water pump is connected to the supplementary steam valve on the feed water pump. When the main steam valve of the steam-driven feed water pump and the supplementary steam valve of the steam-driven feed water pump are closed, the steam-driven feed water pump trips.

[0047] The present invention also provides a steam-driven water supply pump control system, comprising the above-mentioned steam-driven water supply pump anti-false operation tripping control device.

[0048] Compared with the prior art, the steam-driven feedwater pump control system provided by the present invention is provided with a first solenoid valve group and a second solenoid valve group. Only when at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group lose power at the same time, the main steam valve and the supplementary steam valve of the steam-driven feedwater pump will be closed, and then the steam-driven feedwater pump will trip, thereby reducing the possibility of malfunction of the steam-driven feedwater pump tripping and improving the stability of the unit operation.

[0049] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0050] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0051] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0052] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0053] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0054] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0055] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0056] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A steam-driven feedwater pump anti-false tripping control device, characterized in that: The steam-driven feedwater pump anti-false tripping control device comprises a first solenoid valve group, a second solenoid valve group, a first unloading valve, a second unloading valve and a controller, wherein: The control end of the first solenoid valve group is electrically connected to the first control end of the controller, the input end of the first solenoid valve group is connected to the first fire-resistant oil branch, the output end of the first solenoid valve group is connected to the input end of the second solenoid valve group, the output end of the second solenoid valve group is connected to the fire-resistant oil circuit, the control end of the second solenoid valve group is electrically connected to the second control end of the controller, the input end of the first unloading valve is respectively connected to the second fire-resistant oil branch, the main steam valve of the steam-driven feedwater pump and the supplementary steam valve of the steam-driven feedwater pump, the output end of the first unloading valve is connected to the output end of the first solenoid valve group, the control end of the first unloading valve is connected to the input end of the first solenoid valve group, the input end of the second unloading valve is respectively connected to the second fire-resistant oil branch, the main steam valve of the steam-driven feedwater pump and the supplementary steam valve of the steam-driven feedwater pump, the output end of the second unloading valve is connected to the output end of the second solenoid valve group, and the control end of the second unloading valve is connected to the input end of the second solenoid valve group; The first solenoid valve group includes a first solenoid valve and a second solenoid valve, and the first solenoid valve and the second solenoid valve are connected in parallel; The second solenoid valve group includes a third solenoid valve and a fourth solenoid valve, and the third solenoid valve and the fourth solenoid valve are connected in parallel.

2. The steam-driven feedwater pump anti-false tripping control device according to claim 1 is characterized in that: When at least one solenoid valve in the first solenoid valve group and at least one solenoid valve in the second solenoid valve group lose power at the same time, the main steam valve of the steam-driven feedwater pump and the supplementary steam valve of the steam-driven feedwater pump are closed.

3. The steam-driven feedwater pump anti-false tripping control device according to claim 1 is characterized in that: The main steam valve of the steam-driven feed water pump is provided with a first fast-closing component, and the supplementary steam valve of the steam-driven feed water pump is provided with a second fast-closing component.

4. The steam-driven feedwater pump anti-false tripping control device according to claim 3 is characterized in that: The pneumatic water supply pump anti-false tripping control device also includes a first speed-off branch and a second speed-off branch, wherein the first end of the first speed-off branch is connected to the first speed-off component, the second end of the first speed-off branch is connected to the second anti-fire oil branch, the first end of the second speed-off branch is connected to the second speed-off component, and the second end of the second speed-off branch is connected to the second anti-fire oil branch.

5. The steam-driven feedwater pump anti-false tripping control device according to claim 1 is characterized in that: A pressure sensor is provided between the output end of the first solenoid valve group and the input end of the second solenoid valve group.

6. The steam-driven feedwater pump anti-false tripping control device according to claim 1, characterized in that: The pneumatic water supply pump anti-false tripping control device also includes: an oil tank, an oil pump and a fire-resistant oil main line. The oil pump is arranged in the oil tank, the oil pump is connected to the fire-resistant oil main line, the fire-resistant oil main line is also connected to the first fire-resistant oil branch line and the second fire-resistant oil branch line, and the oil tank is also connected to the fire-resistant oil circuit.

7. The steam-driven feedwater pump anti-false tripping control device according to claim 1 is characterized in that: The main steam valve of the steam-driven feed water pump and the supplementary steam valve of the steam-driven feed water pump are both connected to the steam-driven feed water pump.

8. A steam-driven feedwater pump control system, comprising the steam-driven feedwater pump anti-false tripping control device according to any one of claims 1 to 7.

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