Auxiliary steam header system and power supply system

Abstract

The present invention discloses an auxiliary steam manifold system and a power supply system, wherein the auxiliary steam manifold system includes an auxiliary steam manifold, a steam pipeline for small machine debugging, a first stop valve and a balance pipe, the auxiliary steam manifold is used to generate high-temperature steam; the steam pipeline for small machine debugging is connected to the auxiliary steam manifold; the first stop valve is arranged between the steam pipeline for small machine debugging and the auxiliary steam manifold or arranged on the steam pipeline for small machine debugging; the two ends of the balance pipe are respectively connected to the auxiliary steam manifold and the steam pipeline for small machine debugging, and the balance pipe is located at one end of the first stop valve away from the auxiliary steam manifold. The auxiliary steam manifold system of the technical solution of the present invention can remove condensed water between the first stop valve and the steam pipeline for small machine debugging to avoid damaging the blades of the steam turbine.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbines, and in particular to an auxiliary steam header system and a power supply system. Background Art

[0002] In the related art, the auxiliary steam manifold system includes an auxiliary steam internal gas source pipeline, an auxiliary steam manifold and a steam pipeline for small unit debugging, which are connected in sequence, wherein a stop valve is provided between the steam pipeline for small unit debugging and the auxiliary steam manifold; when the stop valve cuts off the flow path between the steam pipeline for small unit debugging and the auxiliary steam manifold, the temperature of the steam pipeline for small unit debugging is greatly reduced, so that more water vapor condenses to form condensed water, and accumulates between the stop valve and the steam pipeline for small unit debugging. The accumulated condensed water may cause damage to the blades of the steam turbine due to vibration caused by water hammer and water ingress into the small steam turbine. Summary of the invention

[0003] The main purpose of the present invention is to provide an auxiliary steam header system and a power supply system, which are intended to remove condensed water between the first stop valve and the steam pipeline for small unit commissioning to avoid damaging the blades of the steam turbine.

[0004] In order to achieve the above object, the present invention proposes an auxiliary steam header system, the auxiliary steam header system comprising:

[0005] Auxiliary steam header, used to generate high-temperature steam;

[0006] A steam pipeline for small machine debugging is connected to the auxiliary steam header;

[0007] A first stop valve is provided between the steam pipeline for small machine debugging and the auxiliary steam manifold or provided on the steam pipeline for small machine debugging; and

[0008] A balancing pipe, both ends of which are respectively connected to the auxiliary steam header and the steam pipeline for small machine debugging, and the balancing pipe is located at one end of the first stop valve away from the auxiliary steam header.

[0009] In one embodiment, the auxiliary steam manifold system further includes a second stop valve disposed on the balance pipe.

[0010] In one embodiment, the auxiliary steam manifold system further includes a third stop valve disposed on the balance pipe, and the third stop valve is spaced apart from the second stop valve.

[0011] In one embodiment, the balancing tube is a spiral tube.

[0012] In one embodiment, an outer wall of the steam pipeline for small machine debugging is provided with a thermal insulation layer.

[0013] In one embodiment, the diameter of the balance pipe is smaller than the diameter of the steam pipe for small machine debugging.

[0014] In one embodiment, the auxiliary steam manifold system also includes a main controller and a temperature sensor provided on the steam pipe for small machine debugging. The temperature sensor is spaced apart from the first stop valve and is electrically connected to the main controller. The temperature sensor is used to detect temperature changes in the steam pipe for small machine debugging so that the main controller controls the opening and closing of the second stop valve and the third stop valve.

[0015] In one embodiment, the auxiliary steam manifold system also includes a water level sensor provided in the steam pipe for small machine debugging, the water level sensor is electrically connected to the main controller, the water level sensor is spaced apart from the first stop valve and the temperature sensor, and is used to detect the water depth of the steam pipe for small machine debugging.

[0016] In one embodiment, the auxiliary steam header system further comprises a warning light arranged on the outer wall of the auxiliary steam header, wherein the warning light is electrically connected to the main controller and is used to remind the user whether there is water accumulation in the steam pipeline for debugging the small machine.

[0017] The present invention also proposes a power supply system, which includes the auxiliary steam header system and a steam turbine, wherein the steam turbine is connected to the small machine strip trial steam pipeline of the auxiliary steam header system.

[0018] The auxiliary steam header system of the technical solution of the present invention comprises an auxiliary steam header, a steam pipeline for small unit debugging, a first stop valve and a balancing pipe, wherein the auxiliary steam header is used to generate high-temperature steam; the steam pipeline for small unit debugging is connected to the auxiliary steam header; the first stop valve is arranged between the steam pipeline for small unit debugging and the auxiliary steam header or on the steam pipeline for small unit debugging; the two ends of the balancing pipe are respectively connected to the auxiliary steam header and the steam pipeline for small unit debugging, and the balancing pipe is located at the end of the first stop valve away from the auxiliary steam header; with such an arrangement, the high-temperature steam of the auxiliary steam header continues to be introduced through the balancing pipe, so that the steam pipeline for small unit debugging maintains a high temperature, and then the air in the steam pipeline for small unit debugging will not be condensed by heat exchange to form accumulated water, thereby removing the condensed water between the first stop valve and the steam pipeline for small unit debugging to avoid damaging the blades of the steam turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of an auxiliary steam header system according to an embodiment of the present invention.

[0021] Description of Figure Numbers:

[0022] Label name Label name 1 Steam Turbine 50 Second stop valve 10 Auxiliary steam header 60 The third stop valve 20 Steam pipeline for small machine debugging 70 Temperature Sensor 30 First stop valve 80 Water level sensor 40 Balance pipe

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The invention provides an auxiliary steam header system.

[0028] In the embodiment of the present invention, refer to Figure 1 The auxiliary steam header system includes an auxiliary steam header 10, a steam pipeline 20 for small unit debugging, a first stop valve 30 and a balance pipe 40. The auxiliary steam header 10 is used to generate high-temperature steam; the steam pipeline 20 for small unit debugging is connected to the auxiliary steam header 10; the first stop valve 30 is arranged between the steam pipeline 20 for small unit debugging and the auxiliary steam header 10 or is arranged on the steam pipeline for small unit debugging; the two ends of the balance pipe 40 are respectively connected to the auxiliary steam header 10 and the steam pipeline 20 for small unit debugging, and the balance pipe 40 is located at the end of the first stop valve 30 away from the auxiliary steam header 10.

[0029] In this embodiment, the small machine debugging steam pipeline 20 is connected to the steam turbine body. When the steam turbine body is started, the small machine debugging steam pipeline 20 brings high-temperature steam into the steam turbine body through the auxiliary steam header 10, so that the steam turbine body can operate to generate electricity; when the steam turbine body is not started, the first stop valve 30 is controlled to be closed, and the connection between the small machine debugging steam pipeline 20 and the auxiliary steam header 10 is disconnected. At this time, the small machine debugging steam pipeline 20 does not have the high-temperature steam of the auxiliary steam header 10 introduced, so that the temperature in the small machine debugging steam pipeline 20 is reduced. At this time, the high-temperature steam of the auxiliary steam header 10 continues to be introduced through the balance pipe 40, so that the small machine debugging steam pipeline 20 maintains a high temperature, and then the air in the small machine debugging steam pipeline 20 will not be heat exchanged and condensed to form accumulated water, thereby removing the condensed water between the first stop valve 30 and the small machine debugging steam pipeline 20 to avoid damaging the turbine blades. It is worth noting that when the auxiliary steam header system operates normally, the small unit debugging steam pipeline 20 is in a connected state with the steam turbine and the first stop valve 30 .

[0030] The auxiliary steam header system of the technical solution of the present invention comprises an auxiliary steam header 10, a steam pipeline 20 for small unit debugging, a first stop valve 30 and a balance pipe 40. The auxiliary steam header 10 is used to introduce high-temperature steam; the steam pipeline 20 for small unit debugging is connected to the auxiliary steam header 10; the first stop valve 30 is arranged between the steam pipeline 20 for small unit debugging and the auxiliary steam header 10; the two ends of the balance pipe 40 are respectively connected to the auxiliary steam header 10 and the steam pipeline 20 for small unit debugging, and the balance pipe 40 is located at the end of the first stop valve 30 away from the auxiliary steam header 10; with such an arrangement, the high-temperature steam of the auxiliary steam header 10 continues to be introduced through the balance pipe 40, so that the steam pipeline 20 for small unit debugging maintains a high temperature, and then the air in the steam pipeline 20 for small unit debugging will not be condensed by heat exchange to form accumulated water, thereby removing the condensed water between the stop valve and the steam pipeline 20 for small unit debugging to avoid damaging the blades of the steam turbine.

[0031] In one embodiment, referring to Figure 1 The auxiliary steam header system further includes a second stop valve 50 disposed on the balance pipe 40 .

[0032] In this embodiment, the balancing pipe 40 includes a first pipe and a second pipe connected to the first pipe, one end of the first pipe away from the second pipe is connected to the small machine debugging steam pipe 20, and one end of the second pipe away from the first pipe is connected to the auxiliary steam header, and the second stop valve 50 is specifically arranged on the second pipe of the balancing pipe; when the first stop valve 30 disconnects the connecting pipeline between the small machine debugging steam pipe 20 and the auxiliary steam header 10, the second stop valve 50 is controlled to open, so that the balancing pipe 40 connects the small machine debugging steam pipe 20 and the auxiliary steam header 10, and the high-temperature steam in the auxiliary steam header 10 is passed into the small machine debugging steam pipe 20 through the balancing pipe 40, so as to increase the temperature in the small machine debugging steam pipe 20 and avoid the air from condensing in the small machine debugging steam pipe 20 by heat exchange. When the first stop valve 30 opens the connecting pipeline connecting the small machine debugging steam pipe 20 and the auxiliary steam header 10, the second stop valve 50 is controlled to close, so that the auxiliary steam header 10 re-enters the high-temperature steam into the small machine debugging steam pipe 20 according to the original pipeline.

[0033] In one embodiment, referring to Figure 1 The auxiliary steam manifold system further includes a third stop valve 60 disposed on the balance pipe 40 , and the third stop valve 60 is spaced apart from the second stop valve 50 .

[0034] In this embodiment, the third stop valve 60 is arranged on the first pipeline and is adjacent to the small unit debugging steam pipeline 20; if the second stop valve 50 fails, the third stop valve 60 on the balance pipe 40 can also be used to control the connection or disconnection of the balance pipe 40, so as to ensure the normal operation of the balance pipe 40, thereby improving the stability of the auxiliary steam manifold system.

[0035] In one embodiment, referring to Figure 1 The balance pipe 40 is a spiral pipe. By extending the length of the balance pipe 40 and thus increasing the volume of the balance pipe 40, more high-temperature steam can enter the steam pipe 20 for small unit debugging, so that the steam pipe 20 for small unit debugging can maintain a high temperature even when the first stop valve 30 is closed, so that the water vapor in the air cannot be condensed and accumulated in the steam pipe 20 for small unit debugging.

[0036] In one embodiment, referring to Figure 1 The outer wall of the steam pipe 20 for small unit debugging is provided with an insulation layer. In this way, when the first stop valve 30 is closed, so that the high-temperature steam cannot be directly introduced into the steam pipe 20 for small unit debugging, the insulation layer can appropriately slow down the cooling speed of the steam pipe 20 for small unit debugging, so that the balance pipe 40 has enough time to raise the temperature of the steam pipe 20 for small unit debugging again.

[0037] In one embodiment, referring to Figure 1The diameter of the balance pipe 40 is smaller than the diameter of the steam pipe 20 for small unit debugging. With such a configuration, the balance pipe 40 only needs to pass part of the high-temperature steam of the auxiliary steam header 10 into the steam pipe 20 for small unit debugging to improve the steam pipe 20 for small unit debugging, and can prevent too much high-temperature steam from entering the steam pipe 20 for small unit debugging, causing the steam turbine connected to the steam pipe 20 for small unit debugging to start running without sufficient high-temperature steam driving, thus affecting the normal operation of the steam turbine.

[0038] In one embodiment, referring to Figure 1 The auxiliary steam manifold system also includes a main controller and a temperature sensor 70 provided on the steam pipeline 20 for small machine debugging. The temperature sensor 70 is spaced apart from the first stop valve 30 and is electrically connected to the main controller. The temperature sensor 70 is used to detect the temperature change of the steam pipeline 20 for small machine debugging so that the main controller can control the opening and closing of the second stop valve 50 and the third stop valve 60.

[0039] In this embodiment, when the temperature sensor 70 detects that the temperature of the steam pipeline 20 for small machine debugging has dropped, it sends an electrical signal to the main controller, and the main controller promptly controls the opening of the second stop valve 50 and the third stop valve 60 according to the electrical signal, so that the balance pipe 40 can be used to connect the steam pipeline 20 for small machine debugging and the auxiliary steam manifold 10, so that the steam pipeline 20 for small machine debugging can maintain a high temperature.

[0040] In one embodiment, referring to Figure 1 The auxiliary steam manifold system also includes a water level sensor 80 provided in the steam pipeline 20 for small machine debugging. The water level sensor 80 is electrically connected to the main controller. The water level sensor 80 is spaced apart from the first stop valve 30 and the temperature sensor 70 to detect the water depth of the steam pipeline 20 for small machine debugging.

[0041] In this embodiment, after the steam turbine and the auxiliary steam manifold 10 are stopped for a short period of time, the air in the small unit debugging steam pipe 20 will still be condensed into condensed water through heat exchange; at this time, the water level of the small unit debugging steam pipe 20 is detected by the water level sensor 80. When water accumulates in the small unit debugging steam pipe 20, the main controller controls the second stop valve 50 or the third stop valve 60 to open according to the electrical signal sent by the water level sensor 80, so that the small unit debugging steam pipe 20 is introduced with high-temperature steam through the balance pipe 40 to maintain the high temperature.

[0042] In one embodiment, referring to Figure 1 The auxiliary steam header system also includes a warning light arranged on the outer wall of the auxiliary steam header 10, which is electrically connected to the main controller and is used to indicate whether there is water accumulation in the steam pipe 20 for small machine debugging. In this way, when the water level sensor 80 detects that there is water accumulation in the steam pipe 20 for small machine debugging, the main controller controls the warning light to light up to remind the user that there is water accumulation in the steam pipe 20 for small machine debugging, so that the user can perform the next step of management and control according to the prompt of the warning light.

[0043] The present invention also proposes a power supply system, which includes an auxiliary steam header system and a steam turbine. The steam turbine is connected to the small machine strip of the auxiliary steam header system by a steam pipeline. The specific structure of the auxiliary steam header system refers to the above-mentioned embodiment. Since the power supply system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An auxiliary steam header system, characterized in that: The auxiliary steam header system comprises: Auxiliary steam header, used to generate high-temperature steam; A steam pipeline for small machine debugging is connected to the auxiliary steam header; A first stop valve is provided between the steam pipeline for small machine debugging and the auxiliary steam manifold or provided on the steam pipeline for small machine debugging; and A balance pipe, the two ends of which are respectively connected to the auxiliary steam header and the small machine debugging steam pipeline, and the balance pipe is located at one end of the first stop valve away from the auxiliary steam header; the auxiliary steam header system also includes a second stop valve arranged on the balance pipe; The diameter of the balance pipe is smaller than the diameter of the steam pipeline for small machine debugging.

2. The auxiliary steam header system according to claim 1, characterized in that: The auxiliary steam manifold system further includes a third stop valve disposed on the balance pipe, and the third stop valve is spaced apart from the second stop valve.

3. The auxiliary steam header system according to claim 1, characterized in that: The balance tube is a spiral tube.

4. The auxiliary steam header system according to claim 1, characterized in that: The outer wall of the steam pipeline for small machine debugging is provided with a heat-insulating layer.

5. The auxiliary steam header system according to claim 2, characterized in that: The auxiliary steam manifold system also includes a main controller and a temperature sensor provided on the steam pipeline for small machine debugging. The temperature sensor is spaced apart from the first stop valve and is electrically connected to the main controller. The temperature sensor is used to detect temperature changes in the steam pipeline for small machine debugging so that the main controller controls the opening and closing of the second stop valve and the third stop valve.

6. The auxiliary steam header system according to claim 5, characterized in that: The auxiliary steam manifold system also includes a water level sensor provided in the steam pipeline for small machine debugging. The water level sensor is electrically connected to the main controller. The water level sensor is spaced apart from the first stop valve and the temperature sensor to detect the water depth of the steam pipeline for small machine debugging.

7. The auxiliary steam header system according to claim 6, characterized in that: The auxiliary steam header system also includes a warning light arranged on the outer wall of the auxiliary steam header, and the warning light is electrically connected to the main controller to remind the user whether there is water accumulation in the steam pipeline for debugging the small machine.

8. A power supply system, characterized in that: The power supply system comprises the auxiliary steam header system and a steam turbine according to any one of claims 1 to 7, and the steam turbine is connected to the small machine debugging steam pipeline of the auxiliary steam header system.

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