Inlet air filtering device for gas turbine

Abstract

The utility model provides an air inlet filtering device for a gas turbine. The air inlet filtering device comprises a sensing mechanism, a spraying mechanism, a pollution discharge mechanism and a filtering mechanism, the sensing mechanism, the spraying mechanism, the pollution discharge mechanism and the filtering mechanism are sequentially arranged in the air inlet direction; the sensing mechanism comprises a plurality of particulate matter sensors which are arranged at the upstream end at intervals; the spraying mechanism comprises a plurality of sprayers, and the sprayers can be in an open or closed state according to sensing signals sent by the particulate matter sensor; the pollution discharge mechanism is arranged below the spraying mechanism, and the arrangement mechanism comprises a plurality of drainage pipes; the filtering mechanism comprises a filter, and the filter is filled with a filtering material. Operation of the spraying mechanism in severe weather is optimized, stable operation of the gas turbine in sand storm is guaranteed, energy consumption and resource waste are greatly reduced, efficient and environment-friendly dust removal is achieved, and economy and high efficiency of long-term operation of the gas turbine are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of intake air filtration, and particularly relates to an intake air filtration device for a gas turbine. Background Art

[0002] In the field of energy conversion and power generation, as an efficient and flexible power generation device, gas turbines are widely used in many aspects such as power production and industrial drive. However, in specific geographical environments, such as the northwest and north of China, the Middle East and Africa where sandstorms occur frequently, gas turbines face severe challenges. The sand and dust weather in these areas not only affects air quality, but also poses a serious threat to the intake air system of gas turbines.

[0003] The main component of yellow sand is silicon dioxide (SiO2), with the quartz content reaching over 90%. In addition, it also contains minerals such as feldspar and mica. These particles usually have high hardness and abrasion resistance. The particle size range of yellow sand is relatively wide, ranging from very fine sand (particle size less than 0.25mm) to coarse sand (particle size greater than 0.5mm). The intrusion of sand and dust particles will cause wear of key components such as gas turbine blades and bearings, thereby affecting the performance and lifespan of the equipment. In addition, sand and dust will also block the intake air system, reduce combustion efficiency, and increase operating costs. In extreme cases, sand and dust may even cause gas turbine failures, affecting the stability of power supply.

[0004] To address this challenge, traditional solutions are to use a single air filtration device, such as a bag filter or a cyclone dust collector. However, these devices have many deficiencies in terms of filtration efficiency, service life, and maintenance costs. For example, although a bag filter can effectively remove large particles of sand and dust, its filtration effect on tiny particles is limited; while a cyclone dust collector has problems such as high energy consumption and complex maintenance. In the long run, dry dust removal technology will bring heavy maintenance tasks to subsequent operations.

[0005] Therefore, in view of the above problems, it is necessary to propose a further solution. Content of the Utility Model

[0006] The purpose of the utility model is to provide an intake air filtration device for a gas turbine to overcome the deficiencies existing in the prior art.

[0007] To achieve the above-mentioned utility model purpose, the utility model provides an intake air filtration device for a gas turbine, which includes: a sensing mechanism, a spraying mechanism, a sewage discharging mechanism, and a filtering mechanism;

[0008] The sensing mechanism, the spraying mechanism, the sewage discharging mechanism, and the filtering mechanism are arranged in sequence according to the air inlet direction;

[0009] The sensing mechanism includes several particulate matter sensors, which are arranged at intervals at the upstream end; the spraying mechanism includes several sprayers, and the several sprayers can be in an open or closed state according to the sensing signals sent by the particulate matter sensors; the sewage discharge mechanism is arranged below the spraying mechanism, and the arrangement mechanism includes several drain pipes; the filtering mechanism includes a filter, and the filter is filled with filtering materials inside.

[0010] As an improvement of the intake air filtering device for a gas turbine of the present utility model, the several particulate matter sensors are installed in a rain shield.

[0011] As an improvement of the intake air filtering device for a gas turbine of the present utility model, a bird net is further arranged between the rain shield and the spraying mechanism.

[0012] As an improvement of the intake air filtering device for a gas turbine of the present utility model, the several sprayers are arranged at intervals above the sewage discharge mechanism according to the air inlet direction.

[0013] As an improvement of the intake air filtering device for a gas turbine of the present utility model, the sewage discharge mechanism further includes a funnel-shaped dust collecting tank, and the several drain pipes are arranged at the bottom of the dust collecting tank.

[0014] As an improvement of the intake air filtering device for a gas turbine of the present utility model, a heater is further arranged between the spraying mechanism and the filtering mechanism.

[0015] As an improvement of the intake air filtering device for a gas turbine of the present utility model, a silencer is further arranged downstream of the filtering mechanism, and the silencer is arranged in an air inlet channel with a reduced inner diameter.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: The intake air filtering device for a gas turbine of the present utility model can respond to weather conditions in real time, start the spraying function in time, and significantly enhance the filtering efficiency of impurities such as yellow sand in the air. In this way, it ensures that the intake air quality meets the standard, avoids abrasion, corrosion and scaling of the blade surface caused by particulate matters such as yellow sand, and prevents the occurrence of surge faults. On the contrary, in good weather conditions, the spraying function can be closed in time, and only the basic filtering components are kept running. In this way, the use of unnecessary filtering components is reduced, and the problem of increased initial pressure difference of the compressor intake air caused by too many filtering components is avoided, thereby preventing the phenomena of reduced flow rate and decreased overall operating efficiency of the gas turbine.

[0017] Furthermore, by ensuring the effective activation of the spraying mechanism under extreme weather conditions, the safety and reliability of the long-term operation of the gas turbine under extreme sandstorm climates are guaranteed, and unnecessary energy consumption and resource waste are also minimized, achieving an efficient and environmentally friendly dust removal effect, and ensuring the economy and efficiency of the gas turbine during long-term operation. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of an embodiment of an intake air filtering device for a gas turbine of the present invention;

[0020] Figure 2 is Figure 1 a plan view of the arrangement mode of several sprayers in Detailed Embodiments

[0021] The present invention will be described in detail below in conjunction with each embodiment. However, it should be noted that these embodiments are not limitations to the present invention. Equivalent transformations or substitutions in terms of functions, methods, or structures made by those of ordinary skill in the art based on these embodiments all fall within the protection scope of the present invention.

[0022] In the field of intake air filtration, traditional methods such as bag filters or cyclone dust collectors have limitations in terms of filtration efficiency, durability, and maintenance costs. Bag filters are good at capturing large particles but are ineffective against fine dust; cyclone dust collectors have high energy consumption, are cumbersome to maintain, and have a heavy maintenance burden during long-term operation. In contrast, in this embodiment, a particulate sensor is installed outside the device, which can control the opening and closing of the precision nozzles in the spray chamber before the fine filtration chamber. After the water flows into the dust collection tank, it is discharged through the drainage mechanism. Furthermore, the operation of the spray mechanism in bad weather is optimized, ensuring the stable operation of the gas turbine during sandstorms, significantly reducing energy consumption and resource waste, achieving efficient and environmentally friendly dust removal, and ensuring the economic efficiency of the long-term operation of the gas turbine.

[0023] As Figure 1 、 2 shown, the intake air filtering device for a gas turbine in this embodiment includes: a sensing mechanism 10, a spray mechanism 20, a sewage discharge mechanism 30, and a filtering mechanism 40. Among them, the sensing mechanism 10, the spray mechanism 20, the sewage discharge mechanism 30, and the filtering mechanism 40 are arranged in sequence according to the air inlet direction.

[0024] The sensing mechanism 10 is used to sense the content of particulate matter in the air so as to judge whether it is necessary to activate the spraying mechanism 20. The sensing mechanism 10 includes a number of particulate matter sensors, which are arranged at intervals at the upstream end. At the same time, in order to protect the above-mentioned number of particulate matter sensors, the number of particulate matter sensors is installed in the rain-proof cover 50. In addition, a bird-proof net 60 is also arranged between the rain-proof cover 50 and the spraying mechanism 20 to prevent large insects and birds from flying into the intake passage and protecting the intake filtering mechanism 40 to operate normally.

[0025] When the spraying mechanism 20 works, the dust-containing gas contacts with droplets or liquid films, which is conducive to the separation of dust particles from the air flow. Among them, the spraying mechanism 20 includes a number of sprayers 21, and the number of sprayers 21 is arranged above the sewage discharge mechanism 30 in the form of an array according to the air inlet direction. The number of sprayers 21 can be in an open or closed state according to the sensing signal sent by the particulate matter sensor.

[0026] Specifically, when the above-mentioned number of sprayers 21 work, they can accurately spray out tiny and uniform water droplets. When the air containing a large amount of sand and dust enters the spraying chamber, these water droplets will have sufficient physical contact with the sand and dust particles and adhere tightly, so as to aggregate the fine sand and dust particles into larger particulate matters. Subsequently, under the action of gravity, these particulate matters will naturally settle into the sewage discharge mechanism 30 below the spraying chamber and be further discharged for purification.

[0027] The sewage discharge mechanism 30 is used to collect sewage containing dust in the air, which is arranged below the spraying mechanism 20, and the arrangement mechanism includes a number of drain pipes 31. The sewage discharge mechanism 30 also includes a funnel-shaped dust collection tank 32, and a number of drain pipes 31 are arranged at the bottom of the dust collection tank 32. Among them, the dust collection tank 32 adopts a convenient detachable design, enabling the operator to easily perform regular cleaning and replacement, thus significantly reducing the filtering burden of the subsequent filter and effectively extending its service life.

[0028] The filtering mechanism 40 includes a filter, and the filter is filled with filtering materials. In one embodiment, the filter screen of the filter uses microfiber non-woven fabric or ultra-fine glass fiber material. A heater 70 is also arranged between the spraying mechanism 20 and the filtering mechanism 40. Among them, the nozzle of the heater 70 is located in the intake passage and is evenly arranged along the cross-section of the intake passage. Through a number of heaters 70, heated air can be provided to the filtering mechanism 40. In addition, a silencer 80 is arranged downstream of the filtering mechanism 40, and the silencer 80 is arranged in an air intake passage 90 with a reduced inner diameter. In one embodiment, the silencer 80 is composed of sound-absorbing plates arranged in parallel.

[0029] The working principle of the intake filtering device for a gas turbine in this embodiment is:

[0030] Use an external particulate matter sensor to continuously and accurately monitor the dust concentration in the air. When the monitored dust concentration exceeds the preset safety threshold, the spraying mechanism will receive a corresponding signal to quickly start the pre-dust removal operation.

[0031] The process of air state change during the operation of the sprayer is as follows:

[0032] Air containing a large amount of particulate matter such as yellow sand enters the spraying mechanism through the protective net. Through inertial collision and contact retention, the dust particles come into contact with the liquid droplets and liquid films, causing the dust particles to be humidified, weighted, and aggregated; the fine dust particles come into contact with the liquid droplets and liquid films through diffusion; after the air passes through the sprayer, a large amount of particulate matter is deposited in the dust collection tank, and the air is roughly purified and then heated to a suitable temperature by a heater; then it undergoes fine purification to obtain high-quality air suitable for the gas turbine; finally, it passes through a muffler to effectively block the propagation of sound waves and significantly reduce the noise level in the device.

[0033] After the dust storm has passed and the outdoor air quality meets the intake requirements, the particulate matter sensor transmits a signal to the system, and the system will send a signal to shut down the spraying mechanism, enabling the air filtration device to quickly return to its normal operating state.

[0034] In summary, the intake air filtration device for a gas turbine of the present utility model can respond to weather conditions in real time, promptly activate the spraying function, and significantly enhance the filtration efficiency of impurities such as yellow sand in the air. This ensures that the intake air quality meets the standards, avoids abrasion, corrosion, and fouling of the blade surface caused by particulate matter such as yellow sand, and prevents the occurrence of surge faults. On the contrary, in good weather conditions, the spraying function can be promptly shut down, and only the basic filtration components are retained for operation. This reduces the use of unnecessary filtration components, avoids the problem of increased initial pressure difference at the compressor intake caused by excessive filtration components, and thus prevents the phenomena of reduced flow rate and decreased overall operating efficiency of the gas turbine. Further, by ensuring the effective activation of the spraying mechanism under extreme weather conditions, the safety and reliability of the long-term operation of the gas turbine under extreme sandstorm climates are guaranteed, and unnecessary energy consumption and resource waste are minimized, achieving an efficient and environmentally friendly dust removal effect, and ensuring the economy and efficiency of the gas turbine during long-term operation.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

[0036] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An air intake filter device for a gas turbine, characterized in that: The air intake filter device for a gas turbine includes: a sensing mechanism, a spraying mechanism, a sewage discharge mechanism, and a filtering mechanism; The sensing mechanism, spraying mechanism, sewage discharge mechanism and filtering mechanism are arranged in sequence according to the air inlet direction; The sensing mechanism includes a plurality of particulate matter sensors, which are arranged at intervals at the upstream end; the spraying mechanism includes a plurality of sprinklers, which can be in an open or closed state according to the sensing signal sent by the particulate matter sensor; the sewage discharge mechanism is arranged below the spraying mechanism, and the sewage discharge mechanism includes a plurality of drainage pipes; the filtering mechanism includes a filter, and the filter is filled with filtering material.

2. The air intake filter device for a gas turbine according to claim 1, characterized in that: The plurality of particle sensors are installed in a rainproof cover.

3. The air intake filter device for a gas turbine according to claim 2, characterized in that: A bird-blocking net is also provided between the rain cover and the spray mechanism.

4. The air intake filter device for a gas turbine according to claim 1, characterized in that: The plurality of sprayers are arranged above the sewage discharge mechanism at intervals according to the air inlet direction.

5. The air intake filter device for a gas turbine according to claim 1, characterized in that: The sewage discharge mechanism further comprises a funnel-shaped dust collecting trough, and the plurality of drainage pipes are arranged at the bottom of the dust collecting trough.

6. The air intake filter device for a gas turbine according to claim 1, characterized in that: A heater is also provided between the shower mechanism and the filter mechanism.

7. The air intake filter device for a gas turbine according to claim 1, characterized in that: A muffler is further provided downstream of the filtering mechanism, and the muffler is provided in an air inlet passage with a contracted inner diameter.

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