CN118167709A - Gas turbine compressor blade cleaning system and method - Google Patents

Abstract

The application discloses a gas turbine compressor blade cleaning system and a method, wherein the gas turbine compressor blade cleaning system comprises the following components: a first set of nozzles disposed at least on an inner wall of the compressor housing; the first drainage pipeline is arranged on the inner wall of the bottom of the compressor shell; a steam generating device; the output end is connected with the first group of nozzles, and the input end is connected with a fluid conveying pipeline of the steam generating device; the fluid conveying pipeline is provided with a first control valve; the first drainage pipeline is provided with a second control valve; and the control device is connected with the steam generating device, the first control valve and the second control valve and is used for controlling the steam generating device to generate high-temperature and high-pressure steam with the set temperature and the set air pressure and controlling the opening and closing of the first control valve and the second control valve. The application adopts the method of directly injecting high-temperature high-pressure steam into the blades in the air compressor to clean, reduces the cleaning difficulty and the cleaning cost, and avoids the environmental pollution caused by detergents and the like.

Description

Gas turbine compressor blade cleaning system and method

Technical Field

The invention relates to the technical field of gas engine cleaning, in particular to a gas engine compressor blade cleaning system and method.

Background

The method comprises the steps that along with the extension of the running time in a gas engine, pollutants are deposited on the surface of a gas engine blade by solvent, along with the accumulation of the pollutants, the blade shape of the gas engine blade is gradually changed, so that the air flow in the gas engine is reduced, the efficiency of the gas engine is reduced, the pressure ratio of the gas engine is reduced, the efficiency of the gas engine and the running performance of the gas engine are reduced, the overall output of the gas engine unit is reduced, and the heat consumption rate is increased; when the operation curve of the compressor approaches to the surge boundary, namely the surge margin is reduced, the operation reliability of the whole gas unit can be reduced, and equipment which can cause surge damage is arranged in severe cases.

Therefore, it is indispensable to effectively clean the blades of the gas compressor in the gas engine. However, the traditional washing requires an external power device to drive the compressor blade to rotate, the washing procedure is complex and complicated, and the washing cost is high.

Disclosure of Invention

The invention aims to provide a system and a method for cleaning a gas compressor blade of a gas engine, which can reduce the difficulty in cleaning the gas compressor blade in the gas engine to a certain extent and reduce the cleaning cost.

In order to solve the technical problems, the invention provides a cleaning system for a gas compressor blade of a gas turbine, comprising: a first set of nozzles disposed at least on an inner wall of the compressor housing;

a first drain pipe provided on the bottom inner wall of the compressor housing;

a steam generating device for generating high-temperature high-pressure steam;

The output end is connected with the first group of nozzles, and the input end is connected with a fluid conveying pipeline of the steam generating device;

A first control valve is arranged on the fluid conveying pipeline; a second control valve is arranged on the first drainage pipeline;

And the control device is connected with the steam generating device, the first control valve and the second control valve and is used for controlling the steam generating device to generate high-temperature and high-pressure steam with the temperature not less than the set temperature and the set air pressure and controlling the opening and closing of the first control valve and the second control valve.

In an alternative embodiment of the application, the device further comprises a second group of nozzles arranged on the inner wall of the bell mouth shell and connected with the input end of the fluid conveying pipeline, and a third group of nozzles arranged on the inner wall of the inlet side shell of the gas engine and connected with the input end of the fluid conveying pipeline;

The fluid conveying pipeline is provided with three different first control valves which are respectively used for independently controlling the connection and disconnection between the fluid conveying pipeline and the first group of nozzles, the second group of nozzles and the third group of nozzles;

The second drainage pipeline is arranged on the inner wall of the bottom of the bell mouth shell; a third drain pipe provided at the bottom of the inner wall of the gas turbine inlet side housing; a fourth drainage pipeline is arranged at the bottom of the gas turbine exhaust diffuser; the fourth drainage pipeline is provided with the second control valve; and the second control valve is respectively arranged on the second drainage pipeline, the third drainage pipeline and the fourth drainage pipeline.

In an alternative embodiment of the application, the first set of nozzles, the second set of nozzles, and the third set of nozzles each comprise at least one turn of nozzles disposed about the axis of the compressor blade;

a first annular pipe communicated with the first group of nozzles is arranged on the periphery of the compressor shell at a position corresponding to the first group of nozzles;

A second annular pipe communicated with the second group of nozzles is arranged on the periphery of the bell-mouth shell at a position corresponding to the second group of nozzles;

A third annular pipe communicated with the third group of nozzles is arranged on the outer periphery of the gas engine inlet side shell at a position corresponding to the third group of nozzles;

The first annular pipe, the second annular pipe and the third annular pipe are respectively connected with three different output ends of the fluid conveying pipeline.

In an alternative embodiment of the application, the spray directions of the first set of nozzles, the second set of nozzles and the third set of nozzles are all adjustable.

In an alternative embodiment of the application, the injection direction comprising the first set of nozzles is perpendicular to the axial direction of the compressor blades;

the injection direction of the second group of nozzles and the third nozzle is the direction pointing to the compressor blade.

In an alternative embodiment of the application, the output ends of the first drain pipe, the second drain pipe, the third drain pipe and the fourth drain pipe are commonly connected with a main drain pipe, and the output end of the main drain pipe is provided with a water quality detector.

In an alternative embodiment of the application, the device further comprises a cleaning water supply device communicated with the input end of the fluid conveying pipeline;

The control device is used for controlling the cleaning water supply device to convey the cleaning water to the first group of nozzles and the second group of nozzles when the gas engine is in an operating state and controlling the first group of nozzles and the second group of nozzles to spray the cleaning water into the bell mouth and the gas compressor respectively.

A gas turbine compressor blade cleaning method applied to the gas turbine compressor blade cleaning system as set forth in any one of the above, the gas turbine compressor blade cleaning method comprising:

When the gas engine is in an off-line non-operation state, controlling the steam generating device to generate high-temperature and high-pressure steam with the temperature not less than the set temperature and the set air pressure;

And controlling a first control valve and a second control valve in the gas turbine compressor blade cleaning system to be in an open state so as to convey the high-temperature and high-pressure steam to a first group of nozzles through a fluid conveying pipeline in the gas turbine compressor, and spraying the high-temperature and high-pressure main steam to the gas turbine blades by using the first group of nozzles to clean the gas turbine blades.

In an alternative embodiment of the present application, when the gas engine is in an on-line operation state, the first control valve and the second control valve are controlled to be in a closed state;

detecting the running power of the combustion engine in real time; when the operating power of the gas engine is within a set power range, controlling the first control valves corresponding to the first group of nozzles and the second group of nozzles to be in an open state;

Controlling the washing water supply device to deliver washing water to the first group of nozzles and the second group of nozzles through the fluid delivery pipeline, and controlling the first group of nozzles and the second group of nozzles to spray washing water to the compressor blade.

In an alternative embodiment of the present application, controlling the first and second sets of nozzles to spray wash water to the compressor blades includes:

The spray flow rate of the first group of nozzles to spray the washing water is controlled to be larger than the spray flow rate of the second group of nozzles to spray the washing water.

The invention provides a gas turbine compressor blade cleaning system and a method, wherein the gas turbine compressor blade cleaning system comprises the following components: a first set of nozzles disposed at least on an inner wall of the compressor housing; a first drainage pipeline arranged on the inner wall of the bottom of the compressor shell; a steam generating device for generating high-temperature high-pressure steam; the output end is connected with the first group of nozzles, and the output end is connected with a fluid conveying pipeline of the steam generating device; the fluid conveying pipeline is provided with a first control valve; the first drainage pipeline is provided with a second control valve; and the control device is connected with the steam generating device, the first control valve and the second control valve and is used for controlling the steam generating device to generate high-temperature and high-pressure steam with the set temperature and the set air pressure and controlling the opening and closing of the first control valve and the second control valve.

In the application, in the process of cleaning the blades of the air compressor, instead of adopting the conventional mode of spraying cleaning water to the horn mouth of the gas compressor and driving the blades of the air compressor to rotate, the nozzle is arranged on the inner wall of the air compressor shell and is communicated with the steam generating device capable of generating high-temperature and high-pressure steam, so that the high-temperature and high-pressure steam can be generated by the steam generating device in the process of cleaning the air compressor, and the high-temperature and high-pressure steam is sprayed into the air compressor through the nozzle positioned on the inner wall of the air compressor shell, thereby achieving the aim of cleaning the blades of the air compressor; in the process, the compressor blade is not required to be driven to rotate, the high-temperature and high-pressure steam is utilized to clean, so that a better cleaning effect can be achieved, even if the greasy dirt on the blade is heavy, no detergent is required to be added, the good cleaning effect can be achieved, and the environmental pollution caused by the detergent is avoided.

In summary, the application adopts the mode of directly spraying high-temperature high-pressure steam into the compressor to clean the blades in the compressor, reduces the cleaning difficulty and the cleaning cost on the basis of ensuring the cleaning effect, and avoids the environmental pollution caused by detergents and the like.

Drawings

For a clearer description of embodiments of the invention or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a gas turbine and gas compressor cleaning system according to an embodiment of the present application;

Fig. 2 is a schematic cross-sectional structure of a compressor housing according to an embodiment of the present application;

FIG. 3 is a schematic flow chart of a method for cleaning a gas turbine blade according to an embodiment of the present application;

In the accompanying drawings: the steam generator 11 is a steam generator 12, the fluid delivery pipe 13 is a cleaning water supply device, 14 is a first control valve, 15 is a second control valve, 16 is a main water discharge pipe, 20 is a compressor, 21 is a compressor blade, 22 is a compressor housing, 23 is a first group of nozzles, 24 is a first annular pipe, 25 is a first water discharge pipe, 30 is a bell mouth, 31 is a bell mouth housing, 32 is a second group of nozzles, 33 is a second annular pipe, 34 is a second water discharge pipe, 40 is a gas turbine, 41 is a gas turbine inlet side housing, 42 is a third group of nozzles, 43 is a third annular pipe, 44 is a third water discharge pipe, 50 is a gas turbine exhaust diffuser, and 51 is a fourth water discharge pipe.

Detailed Description

The structure of the gas engine generally comprises a horn mouth, a gas compressor, a gas engine and an exhaust diffuser which are sequentially connected; wherein, the horn mouth is a conical shell part with a small port near one side of the compressor; the compressor comprises a generally cylindrical housing, rotatable vanes being provided within the housing for compressing and delivering air entering from the bell mouth to the combustion engine, the housing of the combustion engine also being generally cylindrical in configuration.

At present, when blades in a gas compressor are conventionally cleaned, high-pressure water is mainly sprayed from a port on one side of a horn mouth, which is away from the gas compressor, in order to ensure that the high-pressure water can be finally and fully cleaned to all the blades in the gas compressor; there is also a need to further drive the rotation of the blades in the compressor with external driving equipment, which is relatively costly for bulky blade drives; in addition, when the blade oil stain in the compressor is heavy, a detergent capable of removing the oil stain is added into the high-pressure water, and the detergent has certain pollution to the environment and further treatment is needed to be carried out for discharging.

Based on the above discussion, the application provides a cleaning technical scheme for the compressor blade of the gas turbine, which can reduce the cleaning difficulty and the cleaning cost of the compressor blade to a certain extent, and avoid the environmental pollution caused by the detergent on the basis of ensuring the cleaning effect.

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a gas turbine and gas compressor cleaning system according to an embodiment of the present application; fig. 2 is a schematic cross-sectional structure of a compressor housing according to an embodiment of the present application.

In one embodiment of the present application, the gas turbine compressor washing system may include:

a first set of nozzles 23 disposed at least on an inner wall of the compressor housing 22;

A first drain pipe 25 provided on the bottom inner wall of the compressor housing 22;

A steam generating device 11 for generating high-temperature high-pressure steam;

The output end is connected with the first group of nozzles 23, and the input end is connected with the fluid conveying pipeline 12 of the steam generating device 11;

The fluid delivery conduit 12 is provided with a first control valve 14; the first drain pipe 25 is provided with a second control valve 15;

and a control device connected to the steam generating device 11, the first control valve 14 and the second control valve 15 for controlling the steam generating device 11 to generate high-temperature and high-pressure steam not less than a set temperature and a set air pressure, and controlling the opening and closing of the first control valve 14 and the second control valve 15.

Referring to fig. 1, in the present embodiment, a first group of nozzles 23 is disposed on the inner wall of the compressor housing 22, so that the compressor blade 21 can be directly spray-cleaned at a short distance. Compared with the conventional cleaning mode in which cleaning is performed by spraying cleaning water through the port of the bell mouth 30, the spraying cleaning distance in the embodiment is closer, and more comprehensive direct cleaning of the compressor 20 in different directions can be realized; thus, even if the compressor blade 21 is not driven to rotate in an off-line non-operating state of the gas turbine, a good cleaning effect of the compressor blade 21 can be achieved.

In order to further ensure a better cleaning effect on the compressor blade 21, the steam generating device 11 is further provided in the embodiment, and thereby high-temperature and high-pressure steam is sprayed to clean the compressor blade 21, compared with the normal-temperature and normal-pressure cleaning water used for cleaning the compressor blade 21 at present, the cleaning mode adopted in the embodiment can greatly improve the cleaning capability of dirt on the surface of the compressor blade 21; and even if greasy dirt and dirt which are difficult to clean exist on the surface of the compressor blade 21, the better cleaning effect can be achieved under the flushing of high-temperature and high-pressure steam, and a special detergent for removing the greasy dirt is not required to be added into the high-temperature and high-pressure steam, so that the problem of environmental pollution caused by the detergent in discharged waste water is avoided.

Based on the above discussion, in the gas engine compressor cleaning system in this embodiment, when the gas engine is in an offline non-working state, the control device may control the steam generating device 11 to generate high-temperature and high-pressure steam not less than a set temperature and a set air pressure, where the set temperature and the set air pressure may be set according to an actual oil stain degree or a gas engine cleaning frequency, so long as a cleaning effect of the gas engine blades 21 is ensured; on the basis, the control device can further control the first control valve 14 and the second control valve 15 to be in an open state, so that the high-temperature and high-pressure steam generated by the steam generating device 11 can be conveyed to the first group of nozzles 23 through the fluid conveying pipeline 12, and then the high-temperature and high-pressure steam is sprayed to the compressor blades 21 through the first group of nozzles 23 for cleaning operation; the waste water generated during the cleaning process flows to the bottom of the compressor housing 22 and then can be discharged through the first drain pipe 25, thereby completing the cleaning process of the entire compressor blade 21.

It should be understood that the fluid delivery pipe 12 should be further provided with a control valve capable of controlling the pressure of the fluid, or a temperature sensor for detecting the temperature of the fluid, which is a conventional device for ensuring that the whole cleaning system can operate normally and safely, and each control device may be controlled and regulated by a control device, which is not illustrated in this embodiment.

Furthermore, the compressor housing 22 is a substantially cylindrical housing (strictly, a conical housing), and a large number of blades rotatable with bearings, that is, the compressor blades 21, are provided inside the compressor housing 22; in order to ensure an all-round cleaning of the compressor blades 21, the first set of nozzles 23 may be arranged around the axis of rotation of the compressor blades 21 on the inner wall of the compressor housing 22. As shown in fig. 2, in the embodiment shown in fig. 2, a schematic structural view of a plurality of nozzles of the first group of nozzles 23 arranged in a circle around the axis of rotation of the compressor blades 21 is shown.

In the embodiment shown in fig. 1, the first set of nozzles 23 is shown as being provided with a ring of a plurality of nozzles around the compressor blades 21; it will be appreciated that in practice the first set of nozzles 23 may be a plurality of rings of nozzles provided around the compressor blades 21. Thereby allowing the first set of nozzles 23 to spray clean a greater range of compressor blades 21, thereby more fully cleaning the compressor blades 21. Of course, in practical applications, other arrangements of the first set of nozzles 23 are not discharged, as long as the compressor blade 21 can be cleaned more comprehensively.

In addition, in order to ensure that the fluid delivery pipe 12 simultaneously delivers high-temperature and high-pressure water vapor to each of the first group of nozzles 23, a first annular pipe 24 may be further disposed around the compressor housing 22 at a position corresponding to the first group of nozzles 23, and the first annular pipe 24 and each of the first group of nozzles 23 may be maintained in a state of being in communication with each other.

In practical application, the compressor housing 22 may be provided with small through holes corresponding to the first group of nozzles 23 and having the same number of nozzles in the first group of nozzles 23, where one end of the small through holes close to the outer wall of the compressor housing 22 is in sealing communication connection with the first annular tube 24, and one end of the small through holes close to the inner wall of the compressor housing 22 is in sealing communication connection with the first group of nozzles 23; thus, the high-temperature and high-pressure steam in the fluid conveying pipeline 12 can be conveyed into the first annular pipe 24 first, and then conveyed into the first group of nozzles 23 through the first annular pipe 24 for injection.

Based on the above discussion, in order to further enhance the cleaning effect of the compressor blades 21 located at the two end positions of the compressor 20 in practical application, in another alternative embodiment of the present application, the method may further include:

A second group of nozzles 32 provided on the inner wall of the bell housing 31 and connected to the input end of the fluid delivery pipe 12, and a third group of nozzles 42 provided on the inner wall of the gas engine inlet side housing 41 and connected to the input end of the fluid delivery pipe 12;

And the fluid delivery pipe 12 is provided with three different first control valves 14 for independently controlling the connection and disconnection between the fluid delivery pipe 12 and the first group of nozzles 23, the second group of nozzles 32 and the third group of nozzles 42, respectively;

A second drain pipe 34 provided on the bottom inner wall of the bell housing 31; a third drain pipe 44 provided at the bottom of the inner wall of the gas turbine inlet side housing 41; a fourth drain pipe 51 is provided at the bottom of the engine exhaust diffuser 50;

Wherein the second drain pipe 34, the third drain pipe 44 and the fourth drain pipe 51 are each provided with a second control valve 15.

As shown in fig. 1, a bell housing 31 and a gas turbine inlet side housing 41 are connected to both ends of the compressor housing 22, respectively; in the present embodiment, on the basis of the first group of nozzles 23 provided on the compressor housing 22, the second group of nozzles 32 and the third group of nozzles 42 are further provided on the bell housing 31 and the gas turbine inlet side housing 41, respectively; the compressor blades 21 in the compressor housing 22 are cleaned by the second set of nozzles 32 and the third set of nozzles 42 in cooperation with the first set of nozzles 23.

It will be appreciated that the flare housing 31 is generally a conical shaped housing with a small port near one end of the compressor housing 22 and a large port on the other; the external combustion engine inlet side casing 41 is a casing of a transition section between the compressor casing 22 and the combustion engine 40 casing, and the combustion engine inlet side casing 41 is also a casing of a substantially conical structure; the central symmetry axes of the bell housing 31, the compressor housing 22, and the gas turbine inlet side housing 41 are all collinear with the rotation center axis of the compressor blade 21. Thus, the second group of nozzles 32 provided on the inner wall of the bell housing 31 may be arranged in a similar manner to the first group of nozzles 23, that is, a plurality of nozzles circumferentially provided around the straight line in which the rotation axis of the compressor blade 21 is located. Similarly, the third group of nozzles 42 provided in the gas turbine inlet side casing 41 may be provided by a plurality of nozzles circumferentially provided around a straight line along which the rotation axis of the compressor blade 21 is located. Of course, the same is not limited to one turn for the second set of nozzles 32 and the third set of nozzles 42, but may be provided with multiple turns; furthermore, because the second set of nozzles 32 and the third set of nozzles 42 are each intended to clean the compressor blades 21 in the compressor 20; therefore, the injection direction of both the second set of nozzles 32 and the third set of nozzles 42 should be directed towards the compressor blade 21. On the basis of this, in order to achieve a larger spray cleaning of the compressor blade 21, the second set of nozzles 32 and the third set of nozzles 42, and even the first set of nozzles 23, may each employ a nozzle with an adjustable spray direction, so that the cleaning effect of the compressor blade 21 is ensured to some extent.

Also, similar to the first set of nozzles 23, the second set of nozzles 32 may be connected to the fluid delivery line 12 by the second annular tube 33, and the third set of nozzles 42 may be connected to the fluid delivery line 12 by the third annular tube.

Further alternatively, the outer peripheral portion of the bell housing 31 is provided with a second annular pipe 33 communicating with the second group of nozzles 32 at a position corresponding to the second group of nozzles 32;

a third annular pipe 43 communicating with the third group of nozzles 42 is provided at a position corresponding to the third group of nozzles 42 on the outer peripheral portion of the engine inlet side housing 41;

the first annular tube 24, the second annular tube 33 and the third annular tube 43 are connected to three different output ends of the fluid delivery conduit, respectively.

It will be appreciated that the second and third annular pipes 33, 33 may be arranged in the same manner as the first annular pipe 24 is arranged in the compressor housing 22, respectively in the bell housing 31 and the engine inlet side housing 41.

Of course, in practical applications, the pipes for supplying the fluid of high-temperature and high-pressure water vapor to the first group of nozzles 23, the second group of nozzles 32, and the third group of nozzles 42 are not limited to the first annular pipe 24, the second annular pipe 33, and the third annular pipe 43 as shown in fig. 1. For example, the annular pipe may be provided directly on the inner walls of the bell housing 31, the compressor housing 22, and the gas turbine inlet side housing 41, and the nozzles may be provided on the annular pipe, and the annular pipe may be communicated with the external fluid delivery pipe 12 through a pipe extending from the inner wall of the bell housing 31, and it is obvious that the purpose of delivering high-temperature and high-pressure steam to the respective nozzles may be achieved. For example, the first annular pipe 24, the second annular pipe 33 and the third annular pipe 43 may be directly combined into a pipe with a cylindrical structure, so that high-temperature and high-pressure steam is provided for three groups of nozzles at the same time, and the technical scheme of the application can be realized.

On the basis of this, the second group of nozzles 32 and the third group of nozzles 42 are provided with corresponding first control valves 14 on the pipes respectively communicating with the fluid delivery pipes 12 to control the communication and the cut-off between the second group of nozzles 32 and the third group of nozzles 42 and the fluid delivery pipes 12 respectively.

In practical applications, three output ends may be disposed at the end of the fluid delivery pipe 12, and the three output ends are respectively communicated with the first annular pipe 24, the second annular pipe 33 and the third annular pipe 43; on the basis of this, a first control valve 14 is provided independently at each outlet end of the fluid line 12, whereby communication and blocking between the first group of nozzles 23, the second group of nozzles 32 and the third group of nozzles 42 and the fluid line 12 is achieved independently of each other.

Accordingly, in order to avoid the existence of water accumulation in the bell housing 31 and the engine inlet side housing 41 due to the injection of high-temperature and high-pressure steam as well, the second drain pipe 34 and the third drain pipe 44 may be further provided in connection with the bottom of the bell housing 31 and the bottom of the engine inlet side housing 41, respectively, to drain the waste water in time.

In addition, in the actual cleaning of the compressor blades 21, there may be a small amount of cleaning wastewater flowing through the gas turbine 40 to the gas turbine exhaust diffuser 50, and for this reason, in the present embodiment, a fourth drain pipe 51 is further provided in the gas turbine exhaust diffuser 50, and the wastewater generated in the cleaning process is further discharged through the fourth drain pipe 51.

Further, in another alternative embodiment of the present application, it may further include:

The output ends of the first drain pipe 25, the second drain pipe 34, the third drain pipe 44, and the fourth drain pipe 51 are commonly connected to the main drain pipe 16, and the output end of the main drain pipe 16 is provided with a water quality detector.

In this embodiment, a water quality detector is provided in the main drain pipe, and the water quality of the cleaning wastewater discharged from the first drain pipe 25, the second drain pipe 34, the third drain pipe 44, and the fourth drain pipe 51 is detected by the water quality detector. If the dirt in the cleaning wastewater is more, the compressor blade 21 is not cleaned, and if the dirt in the cleaning wastewater is less, the compressor blade 21 is basically cleaned, and the cleaning process can be finished, so that the problems that the compressor blade 21 is not cleaned due to insufficient cleaning time of the compressor blade 21 and the cleaning cost is increased due to overlong cleaning time of the compressor blade 21 are avoided; the cleaning cost is reduced on the basis of ensuring the cleaning effect on the compressor blades 21.

Based on the above discussion, in practical application, instead of providing nozzles on the inner walls of the bell housing 31 and the gas turbine inlet side housing 41, only a larger number of nozzles may be provided on the inner wall of the compressor housing 22 to achieve the full cleaning of the compressor blades 21; however, the inner wall installation space of the bell housing 31 and the engine inlet side housing 41 is relatively more abundant; in addition, the horn housing 31 and the gas turbine inlet side housing 41 can be separated from the compressor blade 21 by a proper distance, which is beneficial to spray cleaning of the compressor blade 21 in a larger area on the compressor blade 21.

In addition, in order to further enhance the cleaning effect of cleaning the compressor blade 21, in another alternative embodiment of the present application, the injection direction of each of the first group of nozzles 23, the second group of nozzles 32, and the third group of nozzles 42 is adjustable.

Of course, it will be understood that the injection direction of each nozzle in each group of nozzles in this embodiment is adjustable, and on the basis of always keeping the injection direction directed to the compressor blade 21, the adjustment of injecting high-temperature and high-pressure steam into different areas on the compressor blade 21 can be performed, so as to ensure more comprehensive cleaning of the whole surface of the compressor blade 21, and avoid the problem that part of the areas cannot be cleaned due to incomplete injection.

In the above embodiments, the description has been mainly made with respect to the injection structure that can inject high-temperature and high-pressure water vapor to the compressor blade 21. The steam generator 11 for generating high-temperature and high-pressure steam may include a heater or the like provided exclusively for cleaning the compressor blades 21; if there are equipment such as a boiler in the environment where the gas engine is operated, the high-temperature and high-pressure steam generated by the boiler may be directly used as the steam for cleaning the compressor blades 21. It is to be understood that the steam generating device 11 may further include a temperature gauge, a barometer, etc. detecting device for detecting the temperature, the barometer, etc. of the high-temperature and high-pressure steam, and may further include a filter, etc. device for ensuring the filtration of impurities in the high-temperature and high-pressure steam; in short, the structural means conventionally required to be provided in the steam generating device 11, or in the fluid delivery pipe 12, should be provided in the steam generating device 11, in this embodiment, not specifically shown.

Furthermore, as previously mentioned, for high temperature and high pressure steam, it is only possible to clean the compressor blades 21 when the gas engine is in an off-line inactive state; in each offline cleaning process, the offline cleaning time is relatively long due to the reasons of waiting for cooling of the gas engine, more dirt and the like, so that the economic benefit of the gas engine is affected to a certain extent. To this end, in a further alternative embodiment of the application, the gas turbine compressor blade cleaning system may further comprise:

a cleaning water supply device 12 communicating with an input end of the fluid delivery pipe 12;

the control means is for controlling the washing water supply means 12 to supply the washing water to the first group of nozzles 23 and the second group of nozzles 32 when the gas engine is in an operating state, and controlling the first group of nozzles 23 and the second group of nozzles 32 to spray the washing water into the bell mouth 30 and the compressor 20, respectively.

Further, in this embodiment, the input end of the fluid delivery pipe 12 is connected to a cleaning water supply device 12, and the cleaning water supply device 12 stores cleaning water therein; the cleaning water in the cleaning water supply device 12 can be delivered to the first group of nozzles 23 and the second group of nozzles 32 through the fluid delivery pipe 12, thereby performing jet cleaning on the compressor blades 21.

Unlike the above-described process of performing the injection cleaning of the compressor blade 21 using the high-temperature and high-pressure steam when the gas engine is in the offline non-operating state, the injection cleaning of the compressor blade 21 using the cleaning water is performed when the gas engine is in the online operating state in the present embodiment.

When the gas engine is actually operated, the temperature of the whole equipment is relatively high, so that even if normal-temperature liquid water is sprayed into the gas engine 20 through the first group of nozzles 23 and the second group of nozzles 32, most of the liquid water can be gasified into steam immediately, the aim of cleaning the gas engine blades 21 can be achieved, the air pressure in the gas engine 20 can be further increased to a certain extent, and the power generation efficiency of the gas engine is increased to a certain extent.

The injection flow rate of the cleaning water injected to the compressor blade 21 when the gas turbine is in the on-line operation state is far smaller than the injection flow rate of the high-temperature and high-pressure steam injected to the compressor blade 21 when the gas turbine 40 is in the off-line non-operation state; it should be ensured that the heat in the compressor 20 and the combustion engine 40 is able to completely gasify the wash water injected by the first set of nozzles 23 and the second set of nozzles 32, respectively, into the combustion engine 40 in a vapor state and finally be discharged from the combustion engine exhaust diffuser 50 in a gaseous state.

Furthermore, it is further contemplated in this embodiment that excessive steam or moisture may cause the combustion engine 40 to stall if it enters the combustion engine 40; for this reason, in the present embodiment, in order to prevent excessive water vapor from entering the gas turbine 40, during the cleaning of the compressor blades 21 in the on-line operation state of the gas turbine, the cleaning water is injected to the compressor blades 21 only through the first group of nozzles 23 and the second group of nozzles 32. That is, the first control valve 14 between the third set of nozzles 42 and the fluid delivery conduit 12 may be closed directly; on this basis, the first group of nozzles 23 and the second group of nozzles 32 should have a smaller injection flow rate of the first group of nozzles 23 than the second group of nozzles 32 in injecting the washing water, thereby avoiding the problem of flameout of the combustion engine 40.

In addition, because the gas engine requires that the gas flow inside the whole gas engine circulates in the direction from the bell mouth 30 to the gas engine 40 in the normal working process, the bell mouth housing 31, the gas compressor housing 22, the gas engine 40 housing and the like all need to maintain good air tightness, therefore, the process of cleaning the gas engine by spraying cleaning water to the gas compressor blades 21 when the gas engine is in an on-line working state should be controlled, and the second control valves 15 arranged on the first drain pipe 25, the second drain pipe 34 and the third drain pipe 44 should be all in a closed state, so as to ensure the normal circulation of the gas flow in the gas engine. As described above, since the cleaning water injected from the first and second nozzle groups 23 and 32, respectively, can be completely vaporized into gaseous water vapor due to the high temperature environment in the compressor 20 and the combustion engine 40, it can be finally discharged through the combustion engine exhaust diffuser 50, i.e., the problem of water accumulation in the interior of the combustion engine is avoided.

In addition, as described above, the cleaning water injected from the first group of nozzles 23 and the second group of nozzles 32 to the compressor blades 21 is gasified by the high temperature environment inside the compressor 20 and the combustion engine 40, and the air pressure in the combustion engine 40 is increased to some extent, and the driving force in the combustion engine 40 is increased. However, in practical applications, if the gas turbine 40 is currently running at full load, the steam formed by the vaporization of the wash water injected by the first set of nozzles 23 and the second set of nozzles 32 further increases the air pressure inside the gas turbine 40, which may cause a safety hazard in the operation of the gas turbine 40. For this reason, the control device should also detect the current operation load state of the combustion engine 40 in real time in controlling the first group of nozzles 23 and the second group of nozzles 32 to spray the washing water, for example, when the operation load of the combustion engine 40 is about 85% of the full load, the first group of nozzles 23 and the second group of nozzles 32 may be controlled to spray the washing water. Of course, it is understood that in practical applications, if the load of the combustion engine 40 is too low, the washing water should not be injected for washing, which may cause the combustion engine 40 to stall. Thus, when the control device detects that the load of the combustion engine 40 is within a proper load range, the first group of nozzles 23 and the second group of nozzles 32 can be controlled to spray the cleaning water, and the flow rate of the cleaning water sprayed by the first group of nozzles 23 and the second group of nozzles 32 can be properly adjusted according to the current load of the combustion engine 40.

It will be understood that the apparatus 13 for supplying the washing water includes a washing water tank for storing washing water at normal temperature, a device for detecting parameters such as water temperature and water pressure, a filter for filtering impurities in the washing water, a driving pump for driving the flow of the washing water, and a valve device for controlling the flow rate of the washing water, which are not shown in the present embodiment.

In the gas turbine compressor blade cleaning system provided in this embodiment, two different cleaning modes may be performed on the gas turbine blade 21, one is to clean the gas turbine blade 21 by spraying high-temperature and high-pressure steam into the gas turbine when the gas turbine is in an offline shutdown state; the other is to clean the compressor blade 21 by spraying cleaning water into the gas engine when the gas engine is in an on-line operation state; compared with the cleaning mode adopting the cleaning water injection mode, the off-line high-temperature high-pressure steam injection mode has the advantages that the cleaning strength of the compressor blade 21 is higher, but the shutdown is required and the time is longer; and when the gas engine is in an on-line working state, although the cleaning strength of the gas engine blade 21 is not high, the gas engine can be cleaned more frequently when the gas engine is in the working state, the normal operation of the gas engine is not delayed completely in the whole process, a better cleaning effect can be achieved on slight dirt on the gas engine blade 21, the accumulation speed of the dirt on the gas engine blade 21 can be reduced to a certain extent, and therefore the off-line cleaning frequency of the gas engine is reduced to a great extent, the cost for cleaning the gas engine is reduced, and the economic benefit of the gas engine is improved.

In summary, in the application, the nozzle is arranged on the inner wall of the compressor housing, and is communicated with the steam generating device, the steam generating device is utilized to generate high-temperature and high-pressure steam, and the high-temperature and high-pressure steam is sprayed into the compressor through the nozzle, so that the purpose of cleaning the compressor blades is achieved; in the process, the compressor blade is not required to be driven to rotate, the high-temperature and high-pressure steam is utilized to clean, so that a better cleaning effect can be achieved, even if the greasy dirt on the compressor blade is heavier, no detergent is required to be added, namely, the better cleaning effect can be achieved, the environmental pollution caused by the detergent is avoided, the cleaning difficulty and the cleaning cost are reduced on the basis of ensuring the cleaning effect, and the environmental pollution caused by the detergent and the like is avoided.

Based on any embodiment, the application also provides an embodiment of a method for cleaning a gas turbine compressor blade; as shown in fig. 3, fig. 3 is a schematic flow chart of a method for cleaning a gas turbine compressor blade according to an embodiment of the present application; the gas turbine compressor blade cleaning method is applied to the gas turbine compressor blade cleaning system; the method for cleaning the gas turbine compressor blade can comprise the following steps:

S1: when the gas engine is in an off-line non-operation state, controlling the steam generating device to generate high-temperature and high-pressure steam with the temperature not less than the set temperature and the set air pressure;

It should be noted that in this embodiment, the gas engine is not in an off-line non-operation state, and the compressor blade in the gas engine is not cleaned immediately after the gas engine is stopped, but the cleaning process is started after the temperature inside the gas engine is reduced to a relatively low temperature after the gas engine is stopped and is not operated, for example, the cleaning process may be started again when the temperature inside the gas engine is reduced to below 95 degrees celsius, so as to ensure the safety in the whole cleaning process.

S2: the method comprises the steps of controlling a first control valve and a second control valve in a gas compressor blade cleaning system of a gas turbine to be in an open state so as to convey high-temperature and high-pressure steam to a first group of nozzles through a fluid conveying pipeline in the gas compressor, and injecting high-temperature and high-pressure main steam to the gas compressor blades by using the first group of nozzles to clean the gas compressor blades.

It will be appreciated that the gas turbine compressor blade cleaning system in the above embodiments may further comprise a second set of nozzles provided on the bell housing and a third set of nozzles provided on the gas turbine inlet side housing; therefore, in the process that the gas engine is in an off-line non-operation state, the first group of nozzles, the second group of nozzles and the third group of nozzles can be controlled to synchronously spray high-temperature and high-pressure steam to the compressor blades.

In addition, the steam generating device generates high-temperature high-pressure steam, and the steam pressure of the high-temperature high-pressure steam can automatically power the steam to convey and flow to the first group of nozzles, the second group of nozzles and the third group of nozzles.

In addition, during the cleaning process of injecting high-temperature and high-pressure steam to the compressor blades, the second control valve on the first drainage pipeline should be opened; of course, if the bottoms of the bell mouth housing and the gas turbine inlet side housing are provided with the second drain pipe and the third drain pipe, respectively, the second control valves on the second drain pipe and the third drain pipe should also be controlled in an open state, so that the cleaning waste water generated in the cleaning process can be timely discharged.

Furthermore, in the process of cleaning the compressor blade, the water quality detection can be carried out on the cleaning wastewater commonly discharged by the first drainage pipeline, the second drainage pipeline and the third drainage pipeline at the same time, and when the fact that the dirt content in the cleaning wastewater is relatively less is detected, the compressor blade can be determined to be cleaned, and the cleaning can be finished.

In another alternative embodiment of the present application, the method for cleaning a gas turbine compressor blade may further comprise:

S3: when the gas engine is in an on-line running state, the first control valve and the second control valve are controlled to be in a closed state.

S4: detecting the running power of the combustion engine in real time; and when the operating power of the combustion engine is within the set power range, controlling the first control valves corresponding to the first group of nozzles and the second group of nozzles to be in an open state.

S5: the control washing water supply device supplies washing water to the first group of nozzles and the second group of nozzles through the fluid supply pipeline.

It can be understood that when the gas engine is in an on-line operation state, the cleaning water at normal temperature is sprayed to the compressor blades through the first group of nozzles and the second group of nozzles, and the cleaning water is gasified to form water vapor due to the high-temperature environment inside the gas engine; however, the internal air pressure of the gas turbine can be increased to a certain extent, so that potential safety hazards are avoided, and the problem of flameout caused by injected cleaning water is avoided on the basis of ensuring the operation safety of the gas turbine because the load corresponding to the set power range and the gas turbine is smaller than the full load and not too small.

For the set power range, it may be determined based on working experience of a worker or trial and error.

Alternatively, in the process of injecting the cleaning water to the compressor blade by the first group of nozzles and the second group of nozzles, the injection flow rate of the cleaning water injected by the first group of nozzles should be controlled to be greater than the injection flow rate of the cleaning water injected by the second group of nozzles, thereby ensuring that the cleaning water injected into the compressor blade from the first group of nozzles and the second group of nozzles flows into the combustion engine after being sufficiently converted into water vapor, and avoiding flameout caused by excessive water in the combustion engine.

The flow rate of the washing water sprayed in the first group of nozzles and the second group of nozzles may be cooperatively controlled by a driving pump and various control valves on a delivery pipe of the washing water supply device; similar to the manner in which fluid flow rates in various conduits are conventionally controlled at present, this embodiment is not specifically described.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is inherent to. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. In addition, the parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of the corresponding technical solutions in the prior art, are not described in detail, so that redundant descriptions are avoided.

The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (10)

1. A gas turbine compressor blade cleaning system comprising: a first set of nozzles disposed at least on an inner wall of the compressor housing;

a first drain pipe provided on the bottom inner wall of the compressor housing;

a steam generating device for generating high-temperature high-pressure steam;

The output end is connected with the first group of nozzles, and the input end is connected with a fluid conveying pipeline of the steam generating device;

A first control valve is arranged on the fluid conveying pipeline; a second control valve is arranged on the first drainage pipeline;

And the control device is connected with the steam generating device, the first control valve and the second control valve and is used for controlling the steam generating device to generate high-temperature and high-pressure steam with the temperature not less than the set temperature and the set air pressure and controlling the opening and closing of the first control valve and the second control valve.

2. The gas turbine compressor blade cleaning system of claim 1, further comprising a second set of nozzles disposed on an inner wall of the bell housing and connected to the input end of the fluid delivery conduit, and a third set of nozzles disposed on an inner wall of the gas turbine inlet side housing and connected to the input end of the fluid delivery conduit;

The fluid conveying pipeline is provided with three different first control valves which are respectively used for independently controlling the connection and disconnection between the fluid conveying pipeline and the first group of nozzles, the second group of nozzles and the third group of nozzles;

The second drainage pipeline is arranged on the inner wall of the bottom of the bell mouth shell; a third drain pipe provided at the bottom of the inner wall of the gas turbine inlet side housing; a fourth drainage pipeline is arranged at the bottom of the gas turbine exhaust diffuser; the fourth drainage pipeline is provided with the second control valve; and the second control valve is respectively arranged on the second drainage pipeline, the third drainage pipeline and the fourth drainage pipeline.

3. The gas turbine compressor blade cleaning system of claim 2, wherein the first set of nozzles, the second set of nozzles, and the third set of nozzles each comprise at least one turn of nozzles disposed about an axis of a compressor blade;

a first annular pipe communicated with the first group of nozzles is arranged on the periphery of the compressor shell at a position corresponding to the first group of nozzles;

A second annular pipe communicated with the second group of nozzles is arranged on the periphery of the bell-mouth shell at a position corresponding to the second group of nozzles;

A third annular pipe communicated with the third group of nozzles is arranged on the outer periphery of the gas engine inlet side shell at a position corresponding to the third group of nozzles;

The first annular pipe, the second annular pipe and the third annular pipe are respectively connected with three different output ends of the fluid conveying pipeline.

4. The gas turbine compressor blade cleaning system of claim 3, wherein the injection direction of the first set of nozzles, the second set of nozzles, and the third set of nozzles are all adjustable.

5. The gas turbine compressor blade cleaning system of claim 4, wherein the direction of injection of said first set of nozzles is perpendicular to the axial direction of said compressor blade;

the injection direction of the second group of nozzles and the third nozzle is the direction pointing to the compressor blade.

6. The gas turbine compressor blade cleaning system as recited in claim 2, wherein the output ends of the first drain pipe, the second drain pipe, the third drain pipe, and the fourth drain pipe are commonly connected to a main drain pipe, and the output end of the main drain pipe is provided with a water quality detector.

7. The gas turbine compressor blade cleaning system as recited in any one of claims 2 to 6, further comprising a cleaning water supply in communication with an input end of said fluid delivery conduit;

The control device is used for controlling the cleaning water supply device to convey the cleaning water to the first group of nozzles and the second group of nozzles when the gas engine is in an operating state and controlling the first group of nozzles and the second group of nozzles to spray the cleaning water into the bell mouth and the gas compressor respectively.

8. A gas turbine compressor blade cleaning method applied to a gas turbine compressor blade cleaning system as claimed in any one of claims 1 to 7, the gas turbine compressor blade cleaning method comprising:

When the gas engine is in an off-line non-operation state, controlling the steam generating device to generate high-temperature and high-pressure steam with the temperature not less than the set temperature and the set air pressure;

And controlling a first control valve and a second control valve in the gas turbine compressor blade cleaning system to be in an open state so as to convey the high-temperature and high-pressure steam to a first group of nozzles through a fluid conveying pipeline in the gas turbine compressor, and spraying the high-temperature and high-pressure main steam to the gas turbine blades by using the first group of nozzles to clean the gas turbine blades.

9. The gas turbine compressor blade cleaning method as set forth in claim 8, wherein said first control valve and said second control valve are both controlled to be in a closed state when said gas turbine is in an on-line operation state;

detecting the running power of the combustion engine in real time; when the operating power of the gas engine is within a set power range, controlling the first control valves corresponding to the first group of nozzles and the second group of nozzles to be in an open state;

Controlling the washing water supply device to deliver washing water to the first group of nozzles and the second group of nozzles through the fluid delivery pipeline, and controlling the first group of nozzles and the second group of nozzles to spray washing water to the compressor blade.

10. The gas turbine compressor blade cleaning method as set forth in claim 9, wherein controlling said first set of nozzles and said second set of nozzles to spray cleaning water to said compressor blade comprises:

The spray flow rate of the first group of nozzles to spray the washing water is controlled to be larger than the spray flow rate of the second group of nozzles to spray the washing water.