Online cleaning device for turbine blades

Abstract

The utility model belongs to the technical field of steam turbines, and relates to a steam turbine blade online cleaning device which comprises a geothermal well, the geothermal well is connected to a steam-water separator through a steam pipeline, the steam-water separator is connected to the center of a flow dividing pipeline through a steam injection pipeline, and the two ends of the flow dividing pipeline are connected with a first heat exchanger and a second heat exchanger respectively. The front side of the first heat exchanger is connected with a heat exchange pipeline, the heat exchange pipeline penetrates out of the first heat exchanger, then is connected with a second heat exchanger and penetrates out of the rear side of the second heat exchanger, the top of the first heat exchanger is connected with a first water pump, and the top of the second heat exchanger is connected with a second water pump. The second water pump is connected to the cleaning pipeline. According to the device, the online cleaning function is achieved, geothermal resources can be fully utilized, a continuous and stable steam source is provided, the efficient and uniform blade cleaning process is achieved through multi-stage heat exchange and flow division control, and the operation efficiency of a steam turbine and the service life of equipment are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbines, and particularly relates to an on-line cleaning device for steam turbine blades. Background Technique

[0002] A geothermal steam turbine uses geothermal steam as the working steam. The geothermal steam comes from a geothermal well underground. After the steam from the geothermal well enters the steam turbine, through a series of devices such as stationary blades and moving blades, the thermal energy of the steam is converted into the mechanical energy of the rotation of the steam turbine rotor.

[0003] The geothermal steam passes through devices such as a filter and a steam-water separator to filter impurities and separate water liquids. After filtration and separation, it enters the steam turbine. However, the geothermal steam still contains impurities such as calcium and magnesium ions. After the steam turbine operates for a period of time, scale will form in its flow path, reducing the power of the steam turbine. If it is not cleaned for a long time, it will affect the normal operation of the steam turbine. Therefore, the scale in the flow path of the steam turbine must be removed. The traditional cleaning method requires shutting down the machine and disassembling the equipment, which is not only time-consuming and laborious but may also cause damage to the equipment.

[0004] Therefore, an on-line cleaning device for steam turbine blades is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an on-line cleaning device for steam turbine blades. By utilizing geothermal steam and a series of heat exchange and shunt devices, it can clean the flow path of the steam turbine in real time without disassembling the steam turbine, solving the problem of the need to shut down the machine and disassemble the equipment in the prior art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is that the utility model provides an on-line cleaning device for steam turbine blades, including a geothermal well. The geothermal well is connected to a steam-water separator through a steam pipeline. The steam-water separator is connected to the center position of a shunt pipeline through an injection steam pipeline. Both ends of the shunt pipeline are respectively connected to a first heat exchanger and a second heat exchanger. A first discharge pipeline is arranged at the bottom of the first heat exchanger, and a second discharge pipeline is arranged at the bottom of the second heat exchanger. The front side of the first heat exchanger is connected to a heat exchange pipeline. After passing through the first heat exchanger, the heat exchange pipeline is connected to the second heat exchanger and passes out from the rear side of the second heat exchanger. A first water pump is connected to the top of the first heat exchanger, and a second water pump is connected to the top of the second heat exchanger. The first water pump is connected to the steam turbine through a cleaning pipeline, and the second water pump is connected to the cleaning pipeline.

[0007] Preferably, a steam valve is arranged on the steam pipeline, and an injection steam valve is arranged on the injection steam pipeline.

[0008] Preferably, the injection steam pipeline is connected to the shunt pipeline through a tee.

[0009] Preferably, a first flow dividing valve and a second flow dividing valve are respectively arranged on both sides of the connection position of the steam injection pipeline of the flow dividing pipeline.

[0010] Preferably, a first discharge valve is arranged on the first discharge pipeline, and a second discharge valve is arranged on the second discharge pipeline.

[0011] Preferably, an inlet valve is arranged on the front side of the first heat exchanger of the heat exchange pipeline, a connection valve is arranged on the rear side of the first heat exchanger, and a stop valve is arranged on the rear side of the second heat exchanger.

[0012] Preferably, a cleaning valve is arranged at the end of the cleaning pipeline, and a check valve is arranged between the first water pump and the second water pump of the cleaning pipeline.

[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0014] 1. The present utility model realizes the online cleaning function, can make full use of geothermal resources, provide a continuous and stable steam source, and through multi-stage heat exchange and flow division control, realize an efficient and uniform blade cleaning process, ensuring the operation efficiency of the steam turbine and the service life of the equipment.

[0015] 2. By utilizing geothermal steam and a series of heat exchange and flow division devices, the present utility model can clean the flow path part of the steam turbine in real time without disassembling the steam turbine, solving the problem of the prior art that requires shutting down and disassembling the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of an online cleaning device for steam turbine blades;

[0018] In the above figures, 1. Geothermal well, 2. Steam valve, 3. Steam-water separator, 4. Steam injection valve, 5. First flow dividing valve, 6. Second flow dividing valve, 7. First heat exchanger, 8. Second heat exchanger, 9. First discharge valve, 10. Inlet valve, 11. Connection valve, 13. Second discharge valve, 14. Stop valve, 15. First water pump, 16. Second water pump, 17. Check valve, 18. Cleaning valve, 19. Steam turbine. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0020] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0021] Embodiment 1, as Figure 1 shown, an on-line cleaning device for steam turbine blades includes a geothermal well 1, which provides a source of geothermal steam. Utilizing geothermal resources, it provides a continuous and stable steam source, which is environmentally friendly and cost-effective. The geothermal well 1 is connected to a steam-water separator 3 through a steam pipeline. The steam-water separator 3 filters impurities in the steam and separates out water liquid to improve the steam quality. The steam-water separator is connected to the center position of a shunt pipeline through an injection steam pipeline. The injection steam pipeline transports the separated steam to the shunt pipeline.

[0022] The injection steam pipeline is connected to the center position of the shunt pipeline. The two ends of the shunt pipeline are respectively connected to a first heat exchanger 7 and a second heat exchanger 8. The first heat exchanger 7 and the second heat exchanger 8 are responsible for heat exchange to condense the steam into water for cleaning. The shunt pipeline shunts the steam to the first heat exchanger 7 and the second heat exchanger 8, and through shunt control, uniform distribution of the steam is achieved. A first discharge pipeline is provided at the bottom of the first heat exchanger 7. When the first heat exchanger 7 stops working, some moisture or impurities will remain inside, and the first discharge pipeline discharges the moisture or impurities. A second discharge pipeline is provided at the bottom of the second heat exchanger 8. When the second heat exchanger 8 stops working, some moisture or impurities will remain inside, and the second discharge pipeline discharges the moisture or impurities.

[0023] The front side of the first heat exchanger 7 is connected to a heat exchange pipeline, and the heat exchange pipeline is connected to external low-temperature cooling water. After passing through the first heat exchanger 7, the heat exchange pipeline is connected to the second heat exchanger 8 and passes out from the rear side of the second heat exchanger 8. A first water pump 15 is connected to the top of the first heat exchanger 7, and a second water pump 16 is connected to the top of the second heat exchanger 8. The first water pump 15 and the second water pump 16 respectively pressurize and pump the condensed water in the first exchanger and the second exchanger. The first water pump 15 is connected to the steam turbine 19 through a cleaning pipeline, and the cleaning pipeline transports the condensed water to clean the blades of the steam turbine 19. The second water pump 16 is connected to the cleaning pipeline.

[0024] The following specifically describes the specific designs of the above key components:

[0025] A steam valve 2 is provided on the steam pipeline. The steam valve 2 is installed on the steam pipeline and is mainly used to control the flow rate of geothermal steam. An injection valve 4 is provided on the injection pipeline. By adjusting the injection valve 4, the amount of steam entering the shunt pipeline can be controlled, thereby precisely controlling the steam used in the cleaning process.

[0026] The injection pipeline is connected to the shunt pipeline through a tee. The injection pipeline is connected to the shunt pipeline through a tee joint. The tee joint allows the steam to be evenly distributed in two directions when entering the shunt pipeline, leading to two heat exchangers respectively.

[0027] A first shunt valve 5 and a second shunt valve 6 are respectively provided on both sides of the connection position of the injection pipeline on the shunt pipeline. By adjusting the first shunt valve 5 and the second shunt valve 6, the flow direction and flow rate of the steam in the shunt pipeline can be controlled, providing precise control of the steam flow, ensuring that each heat exchanger can obtain an appropriate amount of steam according to actual needs, and optimizing the cleaning process.

[0028] A first discharge valve 9 is provided on the first discharge pipeline, and a second discharge valve 13 is provided on the second discharge pipeline. The first discharge valve 9 and the second discharge valve 13 are respectively used to control the opening and closing of the first discharge pipeline and the second discharge pipeline to discharge the excess liquid and impurities in the heat exchanger.

[0029] An inlet valve 10 is provided on the front side of the first heat exchanger 7 of the heat exchange pipeline, a connection valve 11 is provided on the rear side of the first heat exchanger 7, and a stop valve 14 is provided on the rear side of the second heat exchanger 8. The inlet valve 10 is used to control the cooling water to enter the first heat exchanger 7, the connection valve 11 is used to adjust the flow of the cooling water in the heat exchange pipeline, and the stop valve 14 is used to finally control the discharge of the cooling water from the second heat exchanger 8.

[0030] A cleaning valve 18 is provided at the end of the cleaning pipeline. The cleaning valve 18 is used to control the condensate to enter the blade part of the steam turbine 19, and can precisely control the flow rate of the condensate to ensure the effectiveness of the cleaning process. A check valve 17 is provided between the first water pump 15 and the second water pump 16 on the cleaning pipeline. The check valve 17 ensures the one-way flow of the condensate.

[0031] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, it will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0032] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An online cleaning device for steam turbine blades, comprising a geothermal well, characterized in that: The geothermal well is connected to a steam-water separator through a steam pipe, and the steam-water separator is connected to the center of a shunt pipe through a steam injection pipe. Both ends of the shunt pipe are respectively connected to a first heat exchanger and a second heat exchanger. A first discharge pipe is provided at the bottom of the first heat exchanger, and a second discharge pipe is provided at the bottom of the second heat exchanger. The front side of the first heat exchanger is connected to a heat exchange pipe, and the heat exchange pipe is connected to the second heat exchanger after passing through the first heat exchanger and passes through the rear side of the second heat exchanger. A first water pump is connected to the top of the first heat exchanger, and a second water pump is connected to the top of the second heat exchanger. The first water pump is connected to a steam turbine through a cleaning pipe, and the second water pump is connected to the cleaning pipe.

2. The on-line cleaning device for steam turbine blades according to claim 1, characterized in that: The steam pipeline is provided with a steam valve, and the steam injection pipeline is provided with a steam injection valve.

3. The on-line cleaning device for steam turbine blades according to claim 1, characterized in that: The steam injection pipeline is connected to the diversion pipeline through a tee.

4. The on-line cleaning device for steam turbine blades according to claim 1, characterized in that: The diverter pipe is provided with a first diverter valve and a second diverter valve on both sides of the connection position of the steam injection pipe.

5. The on-line cleaning device for steam turbine blades according to claim 1, characterized in that: The first discharge pipeline is provided with a first discharge valve, and the second discharge pipeline is provided with a second discharge valve.

6. The on-line cleaning device for steam turbine blades according to claim 1, characterized in that: The heat exchange pipeline is provided with an inlet valve at the front side of the first heat exchanger, a connecting valve at the rear side of the first heat exchanger, and a stop valve at the rear side of the second heat exchanger.

7. The on-line cleaning device for steam turbine blades according to claim 1, characterized in that: A cleaning valve is arranged at the end of the cleaning pipeline, and a check valve is arranged between the first water pump and the second water pump.

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