JP2005147034A - Air filter for gas turbine, and washing method and washing system for the same, and service life prediction testing method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air filter for a gas turbine to be excellently recycled on condition that the air filter is recycled by ultrasonic washing. <P>SOLUTION: The air filter 1 for a gas turbine is formed by laminating a first filtering material 2 and a second filtering material 3 for restricting deformation of the first filtering material 2 and having an effective opening diameter larger than that of the first filtering material 2, and passes air sucked inside from outside the gas turbine 100 to catch fine particles contained in the air. The first filtering material 2 is made of unwoven fabric formed from polypropylene fiber, and the second filtering material 3 is made of unwoven fabric formed from polyester fiber coated with a polyolefinic resin in a surface thereof, and the second filtering material 3 and the first filtering material 2 are laminated in this order from an upstream side in relation to a flow of the air. The first filtering material 2 and the second filtering material 3 as structural elements of the filter 1 respectively have excellent chemicals resistance. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a gas turbine intake filter that captures dust in the air sucked from the outside to the inside of the gas turbine, and more particularly, to a gas turbine intake filter suitable for ultrasonic cleaning for reuse. The present invention also relates to a gas turbine intake filter cleaning method and a gas turbine intake filter cleaning system for cleaning a gas turbine intake filter that has captured dust. Furthermore, the present invention relates to a life prediction test method for a gas turbine intake filter for predicting the actual life of the gas turbine intake filter.

  As shown in FIG. 10, a general gas turbine 100 includes a compressor 101, a combustor 102, and a turbine unit 103 as main components, and includes a compressor 101 and a turbine unit 103 that are directly connected to each other through a main shaft (not shown). A combustor 102 is disposed therebetween. The compressor 101 is connected to an intake portion 104 for introducing air that is a working fluid in the gas turbine 100 from the outside. Under such a configuration, external air is sucked into the compressor 101 through the intake portion 104 and compressed by rotation of the main shaft, and the compressed air is introduced into the combustor 102 and combusted together with the fuel. The high-temperature and high-pressure combustion gas generated by this combustion is discharged to the turbine unit 103 to rotate the main shaft and is discharged to the outside. Such a gas turbine 100 is utilized as a drive source by connecting a generator or the like to one end of the main shaft.

  Here, the air outside the gas turbine 100 contains more or less dust, depending on the installation location. When this air is sent as it is to the compressor 101 via the intake section 104, dust in the air adheres to and accumulates on the blades of the compressor 101, thereby increasing the power given to the compressor 101. As a result, the performance degradation of the gas turbine 100 is caused. Therefore, in order to eliminate such inconvenience, the general gas turbine 100 is provided with a dedicated filter (hereinafter sometimes referred to as a “gas turbine intake filter”) in the intake section 104, and the intake By passing the air to be passed once through the filter, it is filtered while capturing the dust with the filter, and the filtered air is sent to the compressor 101.

  Specifically, as shown in FIGS. 10 and 11, the gas turbine intake filter 111 is housed and held in a box-like frame body (for example, made of metal, resin, etc.) 110, and the frame in which the filter 111 is housed and held. A plurality of the bodies 110 are mounted in a row on the entire surface of the intake port of the intake section 104. Here, the filter 111 is generally finely folded into a pleat shape for the purpose of expanding the area required for the passage of air in order to efficiently capture the dust in the passing air. Each pleat is folded and stored in a large zigzag shape. In these drawings, white arrows indicate the flow of air. The same applies to the drawings used in the following description.

  By the way, in the gas turbine 100 having the filter 111 in the intake portion 104, dust is captured by the filter 111 with continuous operation. However, the differential pressure increases as the amount of capture increases. Go. When this differential pressure exceeds a specified value, the normal operation of the gas turbine 100 is hindered. Therefore, the filter 111 is replaced during a periodic inspection of the gas turbine 100 performed every predetermined period, for example, every year. And although used filter 111 was conventionally disposed as industrial waste, in recent years, in order to suppress the amount of industrial waste generated from general society and market demands such as environmental conservation and reduction of running costs, After being washed, it is recycled and reused. For cleaning and regeneration of the used filter 111, ultrasonic cleaning in a cleaning liquid is generally applied.

  A conventional configuration of the filter 111 that is suitable for this ultrasonic cleaning will be described below. As shown in FIGS. 12 and 13, the filter 111 is roughly formed by laminating a first filter medium 112 and a second filter medium 113, and the second filter medium 113 and the first filter medium in order from the upstream side with respect to the air flow. 112 are stacked. Specifically, the first filter medium 112 is a non-woven fabric made of polypropylene (PP) fibers by heat melting, while the second filter medium 113 is a non-woven fabric made of polyester (PET) fibers with an acrylic adhesive. Thus, both the first filter medium 112 and the second filter medium 113 are joined by an acrylic adhesive or partial heat melting. Moreover, the effective opening diameter for ventilation | gas_flowing in the 2nd filter medium 113 is larger than the effective opening diameter of the 1st filter medium 112, and the fiber diameter of the nonwoven fabric which forms the 2nd filter medium 113 is larger than the fiber diameter of the 1st filter medium 112. thick. Thus, in the filter 111, the second filter medium 113 mainly functions to reinforce the first filter medium 112 so as to suppress excessive deformation, while the first filter medium 112 functions to filter and collect dust. Demonstrate. Note that the second filter medium 113 also has a function of filtering and collecting dust having a large particle size (see, for example, Patent Documents 1 and 2).

  In addition, as a cleaning system for cleaning the filter 111 that actually captures dust, a conventional storage tank for storing the cleaning liquid has been used, and the used filter 111 is immersed in the cleaning liquid in the storage tank. A cleaning means for sonic cleaning was provided. As the cleaning liquid, generally, a solution obtained by dissolving an alkaline detergent in distilled water as a solvent and exhibiting weak alkalinity in a standard state is applied (for example, see Patent Document 3).

  In addition, it is extremely important to predict the actual life of the filter 111 provided in the gas turbine 100. For the filter 111 that has been washed and regenerated, as well as for the new filter 111 that is not used, This is particularly important because it is an indicator for determining whether or not it has sufficient performance for reuse. This is because even if the amount of dust trapped in the filter 111 increases as the gas turbine 100 continues to operate, at least until the filter 111 is replaced, that is, until the periodic inspection of the gas turbine 100 is performed. This is because it is necessary to ensure that the pressure does not reach the specified value.

For that purpose, the filter 111 life prediction test, so-called acceleration test (dust holding capacity test), has been conventionally performed by a method based on JIS B9908 (performance test method for ventilation air filter unit / ventilation electric dust collector). Yes. In this method, in general, a test powder (JIS 15 species) specified in JIS Z8901 is used as a test dust, and the test concentration is 70 ± 30 mg / N (specified in JIS B9908). Normal) m ³ is used.
JP 2002-201963 A JP 2002-292215 A Japanese Patent No. 2807210

  However, the conventional filter 111 described above has the following problems.

  First, depending on the installation location of the gas turbine 100, the nature of the dust contained in the air in the atmosphere, that is, the nature of the dust trapped by the filter 111 with respect to the acid / base is various. For example, it is an alkaline dust in an atmosphere where a lot of lime or the like is flying, and is an acidic dust in an atmosphere where a lot of sulfur or the like is flying. Then, although the filter 111 is required to have chemical resistance against dust of any property, the second filter medium 113 that is one of the constituent elements of the filter 111 is made of polyester fiber that cannot be said to have sufficient chemical resistance. Therefore, the gas turbine 100 may be gradually deteriorated with the operation of the gas turbine 100, that is, dust trapping, and may not have sufficient durability to be reused in the first place. In addition, about the 1st filter medium 112 which is the other component of the filter 111, since it consists of a polypropylene fiber which is excellent in chemical resistance from the molecular structure, there is no such a problem.

  Second, the cleaning liquid used for ultrasonic cleaning of the used filter 111 is generally a solution obtained by dissolving an alkaline detergent or a neutral detergent in distilled water as a solvent, and is weakly alkaline or medium in a standard state. It exhibits sex. On the other hand, the dust captured by the filter 111 has various properties relating to acid and base as described above. Then, when the filter 111 in which alkaline dust is captured is immersed in the cleaning liquid and ultrasonically cleaned, alkaline dust is mixed in the cleaning liquid and the cleaning liquid itself becomes strongly alkaline. The acrylic adhesive that joins the fibers constituting 113 and the acrylic adhesive that joins the first filter medium 112 and the second filter medium 113 are decomposed. As a result, in the filter 111 after cleaning, the decomposed adhesive adheres to the surface of the fibers constituting the first filter medium 112 and the second filter medium 113, so that it seems to block up to the opening area for ventilation. If the filter 111 after cleaning in this case is used in the gas turbine 100, the differential pressure is rapidly increased after the operation is resumed. That is, the filter 111 having sufficient performance for reuse may not be obtained.

  Third, when the filter 111 has a pleated shape (see FIGS. 11 and 12), the shape of the filter 111 gradually deforms with repeated cleaning and long-term use accompanying reuse. When this deformation becomes significant, as shown in FIG. 14, adjacent pleats come into contact with each other at a portion folded at an upstream position with respect to the air flow (a portion indicated by symbol A in FIG. 14). Then, when such a filter 111 is used in the gas turbine 100, the area required for the passage of air is substantially reduced, so that efficient capture of dust is hindered, and the differential pressure is rapidly increased. However, although the deformation of the filter 111 itself can be suppressed to some extent by the second filter medium 113, it cannot be said to be sufficient. Although it is considered that the deformation strength of the filter 111 is temporarily increased by simply increasing the thickness of the second filter medium 113, the dust trapped by the first filter medium 112, that is, the boundary between the first filter medium 112 and the second filter medium 113. When the dust existing in the filter is cleaned and removed, the thickened second filter medium 113 becomes an obstacle to the removal. Therefore, it cannot be said that it is a good idea considering the ease of cleaning the filter 111.

  Moreover, even if there are various properties related to the acid and base of the dust trapped in the filter 111 as raised in the second problem, the filter 111 is regenerated into a filter 111 having sufficient performance that does not hinder reuse. A cleaning method that can be used is desired.

  Further, in the above-described conventional cleaning system, as a number of filters 111 are cleaned, the dust removed from the filter 111 is mixed into the cleaning liquid in the storage tank as a foreign substance, and the cleaning liquid inevitably becomes contaminated. To go. When the cleaning solution contamination level exceeds the reference value, the cleaning solution in the storage tank is replaced with a new cleaning solution, and the dirty cleaning solution is purified (removal of foreign matter) each time and diluted to meet the water quality standard value of the waste water. After being treated, it was drained into the sea and rivers. Therefore, each time the cleaning liquid is replaced, a large amount of new cleaning liquid is consumed, and costs associated with the cleaning process and the dilution process of the dirty cleaning liquid are generated, which is disadvantageous from the viewpoint of cost reduction. In addition, every time the cleaning liquid is replaced, the dirty cleaning liquid is drained through a purification process and a dilution process. Therefore, even with thorough management, the possibility of environmental pollution cannot be denied.

Furthermore, in the above-described conventional life prediction test method, the test concentration (70 ± 30 mg / Nm ³ ) of the test powder is the actual concentration of dust in the air (0. 05~0.1mg / Nm ³ about) for much higher as compared to when the test would be trapped in the filter 111 in a state of aggregation test powder is firstly can not occur in the actual concentrations. Therefore, as shown in FIG. 15, when the pressure loss that can correspond to the differential pressure in the gas turbine 100 reaches the specified value L, the amount of dust trapped that can correspond to the life is more than the value Wa in the actual machine. The value We increases. In other words, there is a difference between the pressure loss increase characteristics between the test result and the actual machine. Moreover, in the conventional life test method described above, although the test powder has a uniform particle size distribution defined in JIS 15 class, the particle size distribution of the dust in the actual machine varies depending on where the gas turbine 100 is installed. As a result, there will be a difference in the rise characteristic of the pressure loss between the test result and the actual machine. For this reason, it is not possible to make a valid evaluation for predicting the actual life of the filter 111.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a gas turbine intake filter excellent in reuse on the premise that it is cleaned and regenerated by ultrasonic cleaning. It is. It is another object of the present invention to provide a cleaning method capable of cleaning and regenerating a gas turbine intake filter having sufficient performance that does not hinder reuse. Another object of the present invention is to clean and regenerate a gas turbine intake filter that has sufficient performance without re-use and is excellent in cost reduction and environmental conservation. To provide a system. Still another object of the present invention is to provide a life prediction test method capable of accurately predicting the actual life of a gas turbine intake filter in a short time.

  In order to achieve the above object, a gas turbine intake filter according to the present invention is formed by laminating a first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium. A gas turbine intake filter that captures dust in the air by allowing air to be sucked into the air from the outside to the inside of the gas turbine, and is characterized by the following points.

  In the first feature, the first filter medium is a nonwoven fabric made of polypropylene fiber, and the second filter medium is a nonwoven fabric made of polyester fiber whose surface is coated with a polyolefin resin, or a nonwoven fabric made of polyolefin resin fiber. The second filter medium and the first filter medium are stacked in order from the upstream side with respect to the air flow. As a result, both the first filter medium and the second filter medium, which are constituent elements of the filter, have excellent chemical resistance. Therefore, regardless of the nature of the acid / base of the dust trapped in this filter, It does not deteriorate during operation. That is, the filter has sufficient durability to be reused regardless of where the gas turbine is installed.

  Here, from the viewpoint of efficiently capturing dust having a wide particle size distribution according to the particle size and efficiently capturing the dust, the first filter medium is formed by laminating a plurality of layers having different effective opening diameters. It is preferable that the diameter is smaller toward the downstream side with respect to the air flow.

  In the second feature, the first filter medium is a non-woven fabric made of polypropylene fibers in which a plurality of layers having different effective opening diameters are laminated, and the second filter medium is a polyester fiber whose surface is coated with a polyolefin resin. A non-woven fabric made of polyolefin resin, or a non-woven fabric made of polyolefin resin, wherein the first filter medium and the second filter medium are laminated in order from the upstream side with respect to the air flow, and the effective opening diameter of each layer of the first filter medium Is smaller on the downstream side with respect to the air flow. Thus, as in the first feature described above, both the first filter medium and the second filter medium, which are constituent elements of the filter, are excellent in chemical resistance. Therefore, the acid / base of the dust trapped in the filter Regardless of the nature of the gas turbine, i.e., where the gas turbine is installed, the filter does not deteriorate during operation of the gas turbine, and the filter has sufficient durability for reuse. Moreover, each layer of the first filter medium can efficiently capture dust having a wide particle size distribution according to the particle size.

  In the third feature, the first filter medium is a nonwoven fabric made of polypropylene fiber, and the second filter medium is a nonwoven fabric made of polyester fiber whose surface is coated with a polyolefin resin, or a nonwoven fabric made of polyolefin resin fiber. The second filter medium, the first filter medium, and the second filter medium are laminated in order from the upstream side with respect to the air flow, and are folded into a pleat shape. As a result, when the filter is pleated, the second filter medium laminated on both the upstream and downstream sides of the first filter medium is used for deformation strength even if repeated cleaning and long-term use associated with reuse are performed. Therefore, deformation of the filter itself can be surely suppressed. Of course, as with the first feature described above, both the first filter medium and the second filter medium, which are constituent elements of the filter, are excellent in chemical resistance. Therefore, it relates to the acid / base of the dust trapped in this filter. Regardless of the property, that is, where the gas turbine is installed, the filter does not deteriorate during operation of the gas turbine, and the filter has sufficient durability for reuse.

  Further, according to a fourth feature, in the filter having the first to third features described above, the first filter medium and the second filter medium are joined by heat fusion of the polyolefin resin. As a result, the first filter medium and the second filter medium are joined by a polyolefin resin having excellent chemical resistance from the molecular structure instead of the acrylic adhesive generally used in the past. Even if the acid / base level of the cleaning liquid changes during ultrasonic cleaning of the filter, the bonding state is stable. As a result, the washed filter has sufficient performance for reuse.

  Furthermore, it is preferable that the surfaces of the fibers forming the first filter medium and the second filter medium are coated with an organic silicate compound (for example, methyl silicate, ethyl silicate, acrylic silicon resin, etc.). This is because the surface of the fibers forming the first filter medium and the second filter medium is hydrophilized, so that dust captured by the filter can be easily removed by ultrasonic cleaning.

  The gas turbine intake filter cleaning method according to the present invention for achieving the above object includes a first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium. A gas turbine intake filter cleaning method for cleaning a gas turbine intake filter that is laminated and passes air sucked into the gas turbine from the outside to capture dust in the air. It is characterized by the following points.

  In the first feature, an analysis process for analyzing the properties of the acid and base of the dust trapped in the gas turbine intake filter, and a cleaning liquid for neutralizing the dust properties obtained in the analysis process A selection step of selecting, and a cleaning step of ultrasonically cleaning the gas turbine intake filter by immersing the gas turbine intake filter in the cleaning liquid selected in the selection step. As a result, even if the nature of the acid / base of the dust trapped in the filter varies, this property is analyzed directly, and a cleaning solution that neutralizes the analysis result is selected. Even if an acrylic adhesive is used to join the first filter medium and the second filter medium that are constituent elements of the filter, the acrylic adhesive is not decomposed during the ultrasonic cleaning of the filter. As a result, even in the filter after cleaning, the opening area for ventilation is not blocked.

  In the second feature, based on the installation environment of the gas turbine, a determination step for determining properties of the acid / base of the dust captured by the gas turbine intake filter, and the dust obtained in the determination step A selection step of selecting a cleaning liquid to be neutralized with respect to the properties, and a cleaning step of ultrasonically cleaning the gas turbine intake filter in the cleaning liquid selected in the selection step. As a result, even if the properties of the acid and base of the dust trapped in the filter are various, this property is supposedly determined from the installation environment of the gas turbine, and there is a cleaning liquid that neutralizes the determination result. Since it is selected, even if an acrylic adhesive is used to join the first filter medium and the second filter medium, which are constituent elements of the filter, as in the first feature described above, during the ultrasonic cleaning of the filter. The acrylic adhesive is not decomposed, and as a result, the opening area for ventilation is not blocked even in the filter after cleaning.

  Furthermore, the cleaning system for a gas turbine intake filter according to the present invention for achieving the above object allows the air sucked from the outside to the inside of the gas turbine to pass therethrough and captures dust in the air. A gas turbine intake filter cleaning system for cleaning a gas turbine intake filter having the characteristics of: having a storage tank storing a cleaning liquid whose standard state is weakly alkaline or neutral; The cleaning means for ultrasonic cleaning by immersing the gas turbine intake filter in the cleaning liquid, and purifying the cleaning liquid by drawing it from the storage tank, and injecting an acidic solution or an alkaline solution into the cleaning liquid to the standard state And circulating means for returning to the storage tank after returning.

  As a result, the filter can be cleaned and regenerated by the cleaning means so as to have a sufficient performance without any trouble in reuse. In addition, the cleaning liquid that has become dirty during the cleaning process is not drained through the purification process and the dilution process as in the past, but is recovered from the storage tank by the circulation means, and the purification process and the restoration process to the standard state. After passing through, since it is sent back to the storage tank again and reused, a large amount of new cleaning liquid is not consumed, and the possibility of causing environmental pollution is reduced.

  In addition, the life prediction test method for a gas turbine intake filter according to the present invention for achieving the above-mentioned object suppresses the deformation of the first filter medium and the first filter medium and has an effective opening diameter larger than that of the first filter medium. In a gas turbine intake filter that is formed by laminating two filter media and passes air sucked from the outside to the inside of the gas turbine and captures dust in the air, the life expectancy of the gas turbine intake filter is predicted. A gas turbine intake filter life prediction test method for the gas turbine intake filter, in which the second filter medium and the first filter medium are stacked in order from the upstream side with respect to the air flow, It is characterized by the following points.

  In the first feature, powder having a particle size distribution similar to dust in the installation environment of the gas turbine is blown at different concentrations at an actual flow velocity of the gas turbine with respect to the unused gas turbine intake filter. The correlation between the concentration of the powder and the trapped amount ratio of the powder trapped in the first filter medium and the second filter medium is measured, and from this measurement result, trapping of the dust at the actual machine concentration is performed. A concentration setting step in which a maximum value among the concentrations at which a captured amount ratio equivalent to the amount ratio is shown is set as a test concentration; and the powder is added to the gas turbine intake filter to be tested. The test concentration set through the concentration setting step, and the test step of blowing and testing at the actual machine flow rate. As a result, a test powder having a particle size distribution comparable to that of the dust in the actual machine in the gas turbine installation environment is used, so that the test can be performed in a situation commensurate with the actual machine. Moreover, as the test concentration of the test powder during the test, the maximum value among the concentrations that are set in advance by the concentration setting step and that show a capture amount ratio similar to the capture amount ratio at the actual machine concentration. Since the actual machine flow rate is used as the test flow velocity, the test accelerated by the magnification of the test concentration relative to the actual machine concentration can be performed while the actual machine situation is almost reproduced.

  In the second feature, powder having a particle size distribution similar to dust in the installation environment of the gas turbine is blown at different concentrations at an actual flow velocity of the gas turbine with respect to the unused gas turbine intake filter. The correlation between the concentration of the powder and the trapped amount ratio of the powder trapped in the first filter medium and the second filter medium is measured, and from this measurement result, trapping of the dust at the actual machine concentration is performed. A concentration setting step in which a maximum value among the concentrations at which a captured amount ratio equivalent to the amount ratio is shown is set as a test concentration in advance, and the powder is added to the unused gas turbine intake filter. The correlation between the flow rate of the powder and the trapped amount ratio of the powder trapped in the first filter medium and the second filter medium is measured by spraying at different flow rates at the test concentration. , Capture amount ratio at actual machine flow rate The flow rate setting step in which the maximum value of the flow rates at which the trapping amount ratio of the same level is indicated is set as a test flow rate, and the concentration of the powder is set for the gas turbine intake filter to be tested And a test step for testing by blowing at the test concentration and the test flow rate set through the flow rate setting step. As a result, as with the first feature described above, as the test powder, a powder having the same particle size distribution as the actual machine dust in the gas turbine installation environment is used. Can be done. Moreover, as the test concentration of the test powder during the test, the maximum value among the concentrations that are set in advance by the concentration setting step and that show a capture amount ratio similar to the capture amount ratio at the actual machine concentration. As the test flow velocity, the maximum value of the flow velocity that is preset in the flow velocity setting step and shows the capture amount ratio at the same level as the actual device flow velocity is used. While the above situation is substantially reproduced, a test accelerated by the magnification of the test concentration with respect to the actual device concentration, and further by the magnification of the test flow velocity with respect to the actual device flow rate can be performed.

  Here, the powder is prepared in advance for testing, the first classification with a uniform particle size distribution, the second classification in which the particle size distribution is biased toward the small particle size, or the particle size distribution is skewed toward the large particle size. Any one of the third classifications is preferable. Usually, the dust in the actual machine in the installation environment of the gas turbine corresponds to any one of the first to third classifications, and therefore it becomes simple without having to prepare the dust in the actual machine again during the test.

  Here, the gas turbine intake filter to be tested is preferably ultrasonically cleaned after the dust is captured. This is because it is possible to accurately determine whether or not the regenerated filter has sufficient performance for reuse.

  According to the gas turbine intake filter of the present invention, since both the first filter medium and the second filter medium, which are constituent elements thereof, have excellent chemical resistance, the acid / base of dust trapped in this filter Regardless of its nature, it does not deteriorate during operation of the gas turbine. In particular, when the filter is pleated, if the second filter medium is laminated on both the upstream and downstream sides of the first filter medium, this increases the deformation strength of the filter itself. Even when used for a long time, the deformation of the filter itself can be further suppressed. In addition, when the first filter medium and the second filter medium, which are constituent elements of the filter, are joined by thermal fusion of a polyolefin resin having excellent chemical resistance, the degree of acid / base of the cleaning liquid changes during cleaning. However, the bonding state is stable. Therefore, regardless of the installation location of the gas turbine, it is an excellent filter for reuse that has sufficient durability and performance to be reused on the assumption that it is ultrasonically cleaned and regenerated.

  In addition, according to the method for cleaning a gas turbine intake filter of the present invention, even if the properties of the acid and base of the dust trapped in the filter vary, the cleaning liquid that neutralizes the properties is selected. Therefore, even if an acrylic adhesive is used to join the first filter medium and the second filter medium that are constituent elements of the filter, the acrylic adhesive is decomposed during the ultrasonic cleaning of the filter. As a result, the opening region for ventilation is not blocked even in the filter after cleaning. Therefore, regardless of the installation location of the gas turbine, it is possible to clean and regenerate the filter having a sufficient performance that does not hinder reuse.

  Furthermore, according to the cleaning system for a gas turbine intake filter of the present invention, the cleaning means can clean and regenerate a filter having sufficient performance that does not hinder reuse. In addition, the cleaning liquid that has become dirty during the cleaning process is recovered from the storage tank by the circulation means, passed through the purification process and the restoration process to the standard state, and then sent back to the storage tank for reuse. Is not consumed in large quantities and the possibility of environmental pollution is reduced. Therefore, the cleaning system is excellent for cost reduction and environmental protection.

  And, according to the life prediction test method of the gas turbine intake filter of the present invention, as the test powder, a powder having the same particle size distribution as the actual machine dust in the installation environment of the gas turbine is used. Tests can be performed in a situation suitable for the actual machine. Moreover, as the test concentration of the test powder during the test, the maximum value among the concentrations that are set in advance by the concentration setting step and that show a capture amount ratio similar to the capture amount ratio at the actual machine concentration. As the test flow velocity, the maximum value of the actual flow velocity or the flow velocity that is set in advance by the flow velocity setting process and that shows a capture amount ratio similar to the capture amount ratio at the actual flow velocity is used. Therefore, while the situation of the actual machine is almost reproduced, a test accelerated by the magnification of the test density with respect to the actual machine density and further by the magnification of the test flow speed with respect to the actual machine flow rate can be performed. Accordingly, the actual life of the filter can be accurately predicted in a short time.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the gas turbine intake filter according to the first embodiment of the present invention will be described. FIG. 1 is an enlarged cross-sectional view of the gas turbine intake filter of the first embodiment.

  The gas turbine intake filter 1 of the first embodiment shown in FIG. 1 is applied to the gas turbine 100 (see FIG. 10) described in the background art at the beginning, and is a frame attached to the intake portion 104. It is stored and held in the body 110 (see FIGS. 10 and 11). This filter 1 is ultrasonically cleaned, regenerated and reused.

  Next, details of the configuration of the filter 1 will be described below. As shown in FIG. 1, the filter 1 is mainly formed by laminating a first filter medium 2 and a second filter medium 3, and the second filter medium 3 and the first filter medium 2 are sequentially arranged from the upstream side with respect to the air flow. Are stacked. Specifically, the first filter medium 2 is a non-woven fabric obtained by heat melting polypropylene fiber. On the other hand, the second filter medium 3 is a non-woven fabric made of polyester fiber coated with a polyolefin resin on the surface. Both the first filter medium 2 and the second filter medium 3 are joined by heat fusion of a polyolefin resin.

  Moreover, the effective opening diameter for ventilation | gas_flowing in the 2nd filter medium 3 is larger than the effective opening diameter of the 1st filter medium 2, and the fiber diameter of the nonwoven fabric which forms the 2nd filter medium 3 is larger than the fiber diameter of the 1st filter medium 2. thick. Thus, in the filter 1, the second filter medium 3 mainly exerts a function of reinforcing so as to suppress excessive deformation of the first filter medium 2, while the first filter medium 2 has a function of filtering and collecting dust. Demonstrate. The second filter medium 3 also has a function of filtering and collecting dust having a large particle diameter.

  With such a configuration, the first filter medium 2 and the second filter medium 3 which are constituent elements of the filter 1 are both excellent in chemical resistance. Therefore, dust is captured by the filter 1 as the gas turbine 100 is continuously operated. However, the dust is not deteriorated regardless of the nature of the dust captured by the filter 1 in terms of acid and base. That is, depending on the installation location of the gas turbine 100, the properties of the acid and base of the dust trapped in the filter 1 are various. Regardless of this, the filter 1 has sufficient durability for reuse. It becomes.

  In addition, the first filter medium 2 and the second filter medium 3 are joined by a polyolefin resin having excellent chemical resistance due to its molecular structure. Therefore, even when the dust captured by the filter 1 is mixed in the cleaning liquid during the ultrasonic cleaning of the filter 1 and the degree of acid / base of the cleaning liquid changes, the bonding state is stable. As a result, in the filter 1 after washing, there is no factor that blocks the opening area for the original ventilation in the first filter medium 2 and the second filter medium 3, and the filter 1 has sufficient performance for reuse.

  Therefore, it can be said that the filter 1 has excellent durability and performance enough to be reused after being ultrasonically cleaned regardless of the installation location of the gas turbine 100.

  In the above description, the second filter medium 3 is a non-woven fabric made of polyester fiber coated with a polyolefin resin on its surface, but instead of this, a non-woven fabric obtained by heat-melting a polyolefin resin fiber. That is, it may be a nonwoven fabric made of polyolefin resin fibers.

  Next, a gas turbine intake filter according to a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is an enlarged sectional view of the gas turbine intake filter of the second embodiment. The feature of the second embodiment is that the configuration of the first filter medium 2 in the first embodiment is modified.

  In this 2nd Embodiment, as shown in FIG. 2, the 1st filter medium 2 which is the nonwoven fabric of a polypropylene fiber laminated | stacked on the downstream side of the 2nd filter medium 3 is the 1st layer 2a from which an effective opening diameter differs mutually in order from the upstream. And the second layer 2b is laminated. The effective opening diameter of the first layer 2 a is larger than the effective opening diameter of the second layer 2 b and smaller than the effective opening diameter of the second filter medium 3. However, the fiber diameters of the first layer 2a and the second layer 2b are both equal, but are smaller than the fiber diameter of the second filter medium 3. Thus, in the filter 1, the second filter medium 3 exhibits a function of reinforcing so as to suppress excessive deformation of the first filter medium 2 as in the first embodiment, and also functions to filter dust with a large particle diameter. To demonstrate. On the other hand, the 1st filter medium 2 exhibits the function which the 1st layer 2a filters and collects with respect to the dust of medium particle size, and the 2nd layer 2b with respect to fine dust, respectively.

  Such a configuration is effective in terms of trapping efficiency because dust having a particularly wide particle size distribution can be shared and trapped according to the particle size. Of course, the same effects as those of the first embodiment can be obtained. The number of layers constituting the first filter medium 2 is not limited to the two layers of the first layer 2a and the second layer 2b described above, and may be more than that. However, if the thickness of the first filter medium 2 as a whole increases, that is, if the thickness of the filter 1 as a whole increases excessively, the resistance when air passes increases, and the differential pressure during operation of the gas turbine 100 increases. In reality, about two or three layers are desirable.

  Next, a gas turbine intake filter according to a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged cross-sectional view of a gas turbine intake filter according to a third embodiment. The feature of the third embodiment is that the mutual arrangement of the first filter medium 2 and the second filter medium 3 in the second embodiment is modified.

  In the third embodiment, as shown in FIG. 3, the first layer 2a, the second layer 2b, and the second filter medium 3 constituting the first filter medium 2 are laminated in order from the upstream side. Thus, in the filter 1, the second filter medium 3 exhibits only the function of reinforcing so as to suppress excessive deformation of the first filter medium 2. On the other hand, the 1st filter medium 2 exhibits the function in which the 2nd layer 2b filters each with respect to the fine particle dust with respect to the dust of the particle size whose 1st layer 2a is medium or more.

  With such a configuration, particularly for dust having a wide particle size distribution, it can be shared and captured according to the particle size, so the performance compared to the second embodiment is slightly inferior, but in terms of capture efficiency It is effective in. Of course, similar to the second embodiment, the same effects as the first embodiment can be obtained. As in the second embodiment, the number of layers constituting the first filter medium 2 is not limited to two but may be more than that, but the viewpoint of excessive differential pressure during operation of the gas turbine 100 Therefore, attention must be paid to an excessive increase in the thickness of the entire filter 1.

  Next, a gas turbine intake filter according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a cross-sectional view of a gas turbine intake filter according to a fourth embodiment stored and held in a frame, and FIG. 5 is an enlarged cross-sectional view of the filter. The feature of the fourth embodiment is that the filter 1 in the first embodiment is modified, and the problem in the case where the filter 1 is particularly pleated (the third filter in the conventional filter 111 proposed in the background art at the beginning) The problem is to solve the problem.

  In the fourth embodiment, as shown in FIG. 4, the filter 1 is finely folded into a pleat shape for the purpose of expanding the area required for the passage of air in order to efficiently capture dust in the passing air. Further, in the frame 110, the plurality of pleats are folded and stored in a large zigzag shape (see FIG. 11).

  As shown in FIGS. 4 and 5, a second filter medium 3 ′ is further stacked on the downstream side of the first filter medium 2 stacked on the downstream side of the second filter medium 3. That is, the filter 1 is formed by laminating the second filter medium 3, the first filter medium 2, and the second filter medium 3 'in order from the upstream side. The most downstream second filter medium 3 ′ has the same quality as the most upstream second filter medium 3 and has the same effective opening diameter and fiber diameter, and is made of a polyester fiber whose surface is coated with a polyolefin-based resin. It is a nonwoven fabric or a nonwoven fabric made of polyolefin resin fibers. Thus, in the filter 1, the second filter medium 3 and the first filter medium 2 on the most upstream side exhibit the same function as in the first embodiment. Furthermore, the second filter medium 3 ′ on the most downstream side exerts a function of reinforcing so as to suppress excessive deformation of the first filter medium 2.

  With such a configuration, the deformation strength is increased by the second filter medium 3 ′ stacked on the downstream side in addition to the second filter medium 3 stacked on the upstream side of the first filter medium 2, so that the filter 1 is pleated. In this case, even when repeated cleaning and reuse for a long period of time are performed, deformation of the filter 1 itself can be reliably suppressed. Of course, the same effects as those of the first embodiment can be obtained. Since the second filter medium 3 stacked on the upstream side of the first filter medium 2 is not thickened, the dust trapped by the first filter medium 2, that is, at the boundary between the first filter medium 2 and the second filter medium 3. There is no change in the degree of obstruction of removal caused by the second filter medium 3 when the existing dust is washed and removed. By making the second filter medium 3 thinner, the obstruction can be reduced, and the filter 1 can be washed. It becomes easy.

  Next, a gas turbine intake filter which is a fifth embodiment of the present invention will be described. The feature of the fifth embodiment is that the filter 1 in the first to fourth embodiments described above is designed to enhance the ease of ultrasonic cleaning.

  In the fifth embodiment, in the filters 1 of the first to fourth embodiments, fibers forming the first filter medium 2 and the second filter medium 3 (including the second filter medium 3 ′ in the case of the fourth embodiment). The surface of is coated with an organosilicate compound. That is, after the filter 1 is mounted on the gas turbine 100 and used, a surface treatment agent mainly composed of methyl silicate, ethyl silicate, acrylic silicon resin or the like is applied over the entire area of the filter 1. Thus, the surfaces of the fibers forming the first filter medium 2 and the second filter medium 3 are coated with an organic silicate compound (methyl silicate, ethyl silicate, acrylic silicon resin, etc.).

  With such a configuration, since the surfaces of the fibers forming the first filter medium 2 and the second filter medium 3 are hydrophilized, the dust actually captured by the filter 1 mounted and used in the gas turbine 100 is reduced. By ultrasonic cleaning, it easily drops into the cleaning solution and can be easily removed. In particular, it is effective against extremely fine dust such as carbon black.

  Next, a gas turbine intake filter cleaning method according to a sixth embodiment of the present invention will be described. What is to be cleaned by the cleaning method of the sixth embodiment is a conventional filter 111. However, you may apply to the filter 1 of said 1st-5th embodiment.

  The cleaning method of the sixth embodiment is composed of three steps: an analysis step, a selection step, and a cleaning step. Specifically, first, in the analysis step, the used filter 111 to be cleaned is analyzed for properties relating to the acid / base of the dust that has just been captured, for example, whether it is acidic or alkaline. In the subsequent selection process, the cleaning liquid used for ultrasonic cleaning of the filter 111 is selected based on the analysis result in the analysis process. Here, if the analysis result is acidic, the cleaning liquid is an alkaline cleaning liquid. If the result is alkaline, a cleaning solution that neutralizes the properties of the dust, which is the analysis result, is selected, such as an acidic cleaning solution. In the cleaning process, the filter 111 is immersed in the cleaning liquid selected in the selection process and ultrasonically cleaned. Note that the ultrasonic cleaning of the filter 111 may be performed in a vacuum state.

  In such a configuration, even if the properties of the acid and base of the dust captured by the filter 111 are various, this property is directly analyzed, and a cleaning solution that neutralizes this analysis result is selected. Will be. Therefore, even if an acrylic adhesive is used to join the first filter medium 112 and the second filter medium 113 which are constituent elements of the filter 111, the acrylic adhesive is decomposed during the ultrasonic cleaning of the filter 111. As a result, the opening area for ventilation is not blocked in the filter 111 after cleaning. Therefore, regardless of the installation location of the gas turbine 100, it is possible to clean and regenerate the filter 111 having a sufficient performance that does not hinder reuse.

  Next, a gas turbine intake filter cleaning method according to a seventh embodiment of the present invention will be described. The feature of the seventh embodiment is that the analysis process in the sixth embodiment is modified. In addition, what is to be cleaned by the cleaning method of the seventh embodiment is mainly the conventional filter 111 as in the sixth embodiment.

  The cleaning method according to the seventh embodiment includes three processes: a determination process, a selection process, and a cleaning process. Specifically, first, in the determination step, the installation environment of the gas turbine 100 on which the used filter 111 to be cleaned is mounted is investigated in advance. Here, the air around the gas turbine 100 is sampled to analyze the dust in the air, and the peripheral equipment of the gas turbine 100 and the climate (wind direction, strength, etc.) are analyzed. The investigation is done by doing. Next, based on the result of the investigation, the used filter 111 to be cleaned from now on determines whether or not the property regarding the acid / base of the dust that has just been captured, for example, whether it is acidic or alkaline.

  In the subsequent selection process, in the same manner as the selection process in the sixth embodiment, the cleaning liquid used for ultrasonic cleaning of the filter 111 is determined based on the determination result in the determination process with respect to the property of the dust that is the determination result. Select the cleaning solution to be used. Then, in the cleaning process, as in the selection process in the sixth embodiment, the filter 111 is immersed in the cleaning liquid selected in the selection process and ultrasonically cleaned. Note that the ultrasonic cleaning of the filter 111 may be performed in a vacuum state.

  With such a configuration, even if the properties of the acid and base of the dust trapped in the filter 111 are various, this property is determined on the assumption of the installation environment of the gas turbine 100, and the determination result is The cleaning solution to be neutralized will be selected. Therefore, the same effects as those in the sixth embodiment described above can be obtained.

  Next, a gas turbine intake filter cleaning system according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a block diagram showing a schematic configuration of the cleaning system of the eighth embodiment. What is to be cleaned in the cleaning system of the eighth embodiment is the filter 1 of the first to fifth embodiments described above, and in particular, the first filter medium 2 and the second filter medium 3 (of the fourth embodiment). (Including the second filter medium 3 ′ in the case) is made by heat fusion of a polyolefin resin.

  As shown in FIG. 6, the cleaning system 50 according to the eighth embodiment is roughly divided into a cleaning unit 51 and a circulation unit 61. Specifically, the cleaning means 51 first includes an ultrasonic cleaning device 52 for cleaning the used filter 1 and an rinsing ultrasonic device for rinsing the filter 1 cleaned by the ultrasonic cleaning device 52. The ultrasonic cleaning device 53 and the ultrasonic cleaning device 53 each include a cleaning tank 54 and a rinsing tank 55 in which a cleaning liquid in which the filter 1 is immersed is stored. Each of the cleaning tank 54 and the rinsing tank 55 includes a vibrator that generates ultrasonic vibrations.

  Further, the cleaning means 51 includes a water supply tank 56 in which distilled water, which is a solvent for a new cleaning liquid to be supplied to the cleaning tank 54 and the rinsing tank 55, is stored. The distilled water in the water supply tank 56 has been boiled and deaerated by a water supply deaerator 57. Note that detergent is injected into the deaerator 57 from the detergent tank. Here, the cleaning liquid stored in the cleaning tank 54 and the rinsing tank 55 is obtained by dissolving an alkaline detergent or a neutral detergent in distilled water, and exhibits weak alkalinity or neutrality in a standard state.

  Under such a configuration, the used filter 1 is first immersed in the cleaning tank 54 of the ultrasonic cleaning device 52 and ultrasonically cleaned. Subsequently, after taking out from the washing | cleaning layer 54 and passing through air blow drying, it is immersed in the rinse tank 55 of the ultrasonic cleaning apparatus 53 this time, and ultrasonic cleaning (rinsing) is carried out. Then, the filter 1 is taken out from the rinsing tank 55, and after air blow drying, cleaning and regeneration of the filter 1 are completed. In some cases, the ultrasonic cleaning device 52 and the ultrasonic cleaning device 53 are evacuated by a vacuum pump or the like, and the used filter 1 is subjected to ultrasonic cleaning and then rinsed ultrasonic cleaning.

  At that time, as a number of filters 1 are washed, the dust removed from the filter 1 is mixed in the washing liquid in the washing tank 54 and the rinsing tank 55, and the degree of acid / base of the washing liquid changes. However, in the filter 1 to be cleaned by the cleaning system 50 of the eighth embodiment, the first filter medium 2 and the second filter medium 3 are bonded with polyolefin having excellent chemical resistance due to its molecular structure. Since it is made of a system resin, its bonding state during ultrasonic cleaning is stable. Therefore, as described in the first to fifth embodiments, the cleaned filter 1 is cleaned and regenerated to have a sufficient performance without any problem for reuse.

  Further, the dust removed from the filter 1 is mixed as a foreign substance in the cleaning liquid in the cleaning tank 54 and the rinsing tank 55, and the cleaning liquid gradually becomes contaminated. The circulating means 61 described later functions with respect to this dirty cleaning liquid.

The circulation means 61 is roughly divided into a bag filter 62 that draws a dirty cleaning liquid from the cleaning layer 54 and the rinsing layer 55, separates and removes solid foreign matters of 5 μm or less in the cleaning liquid, and the entire circulation means 61. The pumping pump 63 for pumping and circulating the cleaning liquid, the purification device 64 for finally purifying the cleaning liquid passed through the bag filter 62 by the high-speed coagulation sedimentation method, and the deaeration for boiling the cleaning liquid purified through the purification device 64 Instrument 65. Further, a water quality inspection device 66 that takes in the cleaning liquid from here and analyzes the properties (pH) of the cleaning liquid in relation to the acid and base is connected to the circulation path that is subsequent to the bag filter 62 and before the purification device 64. . Further, the purification device 64 stores an acid liquid tank 67 in which an acidic solution such as H ₂ SO ₄ is stored, an alkaline liquid tank 68 in which an alkaline solution such as NaOH is stored, an alkaline detergent or a neutral detergent. A detergent tank 69 is connected. In addition, a valve is provided at an appropriate position in the connection path and the circulation path between the various devices constituting the cleaning means 51 and the circulation means 61.

  Under such a configuration, when the contamination state of the cleaning liquid in the cleaning layer 54 and the rinsing layer 55 exceeds the reference value, the dirty cleaning liquid is firstly purified through the bag filter 62 by driving the pumping pump 63, It is sent to the purification device 64. Here, a part of the cleaning liquid is taken into the water quality inspection device 66, and the properties of the cleaning liquid regarding acid and base are analyzed. After the final cleaning, the cleaning liquid sent to the purification device 64 is acidified from the acid solution tank 67 or the alkaline solution tank 68 based on the analysis result of the water quality inspection device 66 in order to return to the weak alkaline or neutral state that is the standard state. A solution and an alkaline solution are injected, and a detergent is injected from the detergent tank 69. The cleaning liquid is boiled through the deaerator 65 and sent back to the cleaning tank 54.

  In this way, the cleaning liquid that has become dirty during the cleaning process is recovered from the cleaning layer 54 and the rinsing layer 55 by the circulation means 61, and after being subjected to purification processing and restoration processing to the standard state, is sent back to the cleaning layer 54 again. To be reused. Therefore, whenever the contamination state of the cleaning liquid in the cleaning layer 54 and the rinsing layer 55 exceeds the reference value as in the conventional cleaning system, the cleaning liquid is not replaced with a new cleaning liquid, and the dirty cleaning liquid is purified. There is no drainage after treatment and dilution. Therefore, in the cleaning system of the eighth embodiment, a large amount of new cleaning liquid is not consumed and the possibility of environmental pollution is reduced, which is excellent for cost reduction and environmental conservation.

  Next, a life prediction test method for a gas turbine intake filter according to a ninth embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a view showing the characteristics of the test powder used in the life prediction test method of the ninth embodiment, and FIG. 8 is a view showing an example of the measurement result obtained in the concentration setting step in the life prediction test method. .

  The life prediction test of the ninth embodiment is basically performed by a method based on JIS B9908 as in the prior art, but differs in that a preliminary test is performed prior to the main test. That is, the life prediction test method according to the ninth embodiment includes a concentration setting process described later for details as a preliminary test and a test process described later for details as a main test. Further, the test object in the life prediction test method of the ninth embodiment is the filter 1 of the first, second, or fourth embodiment described above, or the fifth embodiment including any one of them. It is the filter 1, Comprising: The 2nd filter medium 3 and the 1st filter medium 2 are laminated | stacked in order from the upstream. However, the conventional filter 111 may be applied. In the concentration setting process, a new unused filter 1 is used, and in the test process, the filter 1 after cleaning, which is extracted from the lot to be actually evaluated, is used. Hereinafter, each of these steps will be described in detail.

  First, before actually entering the concentration setting step and the test step, the test powder used in both steps is selected. Here, the powder having the same particle size distribution as the dust (actual dust) in the installation environment in the gas turbine 100 to be mounted with the filter 1 of the lot including the filter 1 to be tested is selected. . For example, the actual dust collected and prepared in advance at the installation location of the gas turbine 100 may be used, but in the ninth embodiment, selected from three classifications having different particle size distributions prepared in advance for testing. Is done.

  As shown in FIG. 7, the test-dedicated powder is roughly classified into a first classification, a second classification, and a third classification, and powders having different particle sizes are blended. As shown in FIG. 7 (a), the first classification has a uniform particle size distribution that exists almost uniformly from fine particles to coarse particles, and the second classification shows fine particles as shown in FIG. 7 (b). In the third classification, as shown in FIG. 7 (c), the particle size distribution in which many coarse particles are present is biased toward the large particle size side. . Here, in the ninth embodiment, the reason for selecting the test powder from such test-dedicated powder is that the dust in the actual machine generally varies depending on where the gas turbine 100 is installed. Usually, since it corresponds to one of the first to third classifications, it is not necessary to prepare the dust of the actual machine again during the test, which is convenient. In addition, verification of the particle size distribution of the 1st-3rd classification can be easily performed by the under sensor sampler method etc.

  Subsequently, in the concentration setting step, a preliminary test for setting the concentration of the test powder to be applied to the filter 1 in the test step which is a subsequent main test is performed. Specifically, the selected test powder is blown to the unused filter 1 at a predetermined concentration and at the actual flow rate of the gas turbine 100, and is captured by the first filter medium 2 and the second filter medium 3. Measure the capture amount ratio of the test powder. Here, the actual machine flow rate is 3 cm / s. Next, the selected test powder is blown to another unused filter 1 at a concentration different from the previous concentration and at the actual flow velocity of the gas turbine 100, and similarly, the first filter medium 2 and the second filter medium 3 are blown. Measure the capture amount ratio of the test powder trapped in This is repeated several times to determine the correlation between the concentration of the test powder and the captured amount ratio. An example of this measurement result is shown in FIG.

As is clear from FIG. 8, the trapping amount ratio is substantially constant until the concentration of the test powder is about 2 mg / Nm ³ (see symbol D in FIG. 8), but rapidly changes beyond this. This phenomenon proves that the filter 1 is trapped in the agglomerated state when the test concentration of the test powder is 70 ± 30 mg / Nm ³ in the conventional life prediction test method. On the contrary, it can be said that the aggregation state is not caused until the concentration of the test powder is about 2 mg / Nm ³ . Therefore, in the concentration setting step, 2 mg / Nm ³ is set as the test concentration D of the test powder used in the test step which is the subsequent main test. That is, as the test concentration D, the actual machine concentration of dust in the air at the actual installation location of the gas turbine 100 (about 0.05 to 0.1 mg / Nm ³ , in FIG. The maximum value (2 mg / Nm ³ ) is set out of the concentrations at which the capture amount ratio similar to the capture amount ratio in the reference Da) is shown.

  After that, the process proceeds to the test process which is the main test. In the test step, the selected test powder is sprayed for a predetermined time at the test concentration D and the actual machine flow rate to the washed filter 1 to measure the transition of pressure loss. If the pressure loss does not reach the specified value, the lot with the filtered filter 1 removed is evaluated as having sufficient performance for reuse and completed.

  As described above, according to the life prediction test method of the ninth embodiment, the test powder having the same particle size distribution as the dust of the actual machine is used, so that the test in a situation suitable for the actual machine is performed. Yes. In addition, as the test concentration D of the test powder during the test, among the concentrations that are set in advance by the concentration setting step and that have a capture amount ratio similar to the capture amount ratio at the actual machine concentration Da. Since the maximum value is used and the actual machine flow rate is used as the test flow rate, the actual test can be performed while the state of the actual machine is almost reproduced and accelerated by the magnification of the test concentration D with respect to the actual machine concentration Da.

In Atehamere to an example described above, actual concentration Da is 0.05 to 0.1 / Nm ³ or so, since the test concentration D is at 2 mg / Nm ^3, compared with the case of this test in actual concentration Da and actual flow rate Thus, the main test accelerated 20 to 40 times can be performed. That is, when the predetermined period for the periodic inspection of the gas turbine 100 is one year, the test time of about 10 to 20 days is sufficient. Accordingly, the actual life of the filter 1 after cleaning can be accurately predicted in a short time.

  In the above description, the test object in the test process is the filter 1 after cleaning in order to accurately determine whether or not the test object has sufficient performance for reuse, but this is unused. A new filter 1 may be used instead. This is because it is possible to evaluate whether or not the filter 1 of the lot including the unused filter 1 has sufficient performance for the first use.

  Next, a life prediction test method for a gas turbine intake filter according to a tenth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a diagram illustrating an example of measurement results obtained in the flow rate setting step in the life prediction test method of the tenth embodiment. The feature of the tenth embodiment is that the preliminary test of the ninth embodiment is modified to further shorten the test time in the ninth embodiment.

  In other words, the life prediction test method of the tenth embodiment adds a flow rate setting process described later in detail as a preliminary test. Prior to the concentration setting process, the process is the same as in the ninth embodiment, and the test process is almost the same as in the ninth embodiment.

Subsequent to the concentration setting step, in the flow rate setting step, a preliminary test for setting the flow rate of the test powder to be applied to the filter 1 in the test step which is a subsequent main test is performed. Specifically, the selected test powder was sprayed to the unused filter 1 at the above-described test concentration D and at a predetermined flow rate, and was captured by the first filter medium 2 and the second filter medium 3. Measure the capture amount ratio of the test powder. Here, the test concentration D is 2 mg / Nm ³ . Next, another unused filter 1 is sprayed with the same selected test powder at a test concentration D and at a flow rate different from the previous flow rate, and similarly captured by the first filter medium 2 and the second filter medium 3. The captured amount ratio of the obtained test powder is measured. This is repeated several times to determine the correlation between the flow rate of the test powder and the capture rate ratio. An example of the measurement result is shown in FIG.

  As is clear from FIG. 9, the trapping amount ratio is substantially constant until the flow rate of the test powder is about 10 cm / s (see reference symbol V in FIG. 9), but changes rapidly at higher rates. This phenomenon indicates that the agglomeration state is not caused until the flow rate of the test powder is about 10 cm / s. Therefore, in the flow rate setting step, 10 cm / s is set as the test flow velocity V of the test powder used in the test step which is the subsequent main test. That is, the test flow velocity V is a flow velocity at which a capture amount ratio comparable to the capture amount ratio at the actual machine flow velocity (3 cm / s, see symbol Va in FIG. 9) is shown from the test result in the flow velocity setting step. The maximum value (10 cm / s) is set.

  After that, the process proceeds to the test process which is the main test. In the test process, the selected powder for test is sprayed for a predetermined time at the test concentration D and the test flow velocity V to the washed filter 1 to measure the transition of pressure loss. If the pressure loss does not reach the specified value, the lot with the filtered filter 1 removed is evaluated as having sufficient performance for reuse and completed.

  As described above, according to the life prediction test method of the tenth embodiment, as in the ninth embodiment, a test powder having a particle size distribution similar to that of actual dust is used. The test can be performed in a situation suitable for the actual machine. Moreover, during the test, as in the ninth embodiment, the test concentration D of the test powder is approximately the same as the captured amount ratio at the actual machine concentration Da set in advance by the concentration setting step. The maximum value of the concentrations indicating the trapping amount ratio is used, and the test flow rate V is set in advance by the flow rate setting step, and the trapping amount ratio is the same as the trapping amount ratio at the actual machine flow rate Va. Since the maximum value of the flow velocity shown is used, the actual machine situation is almost reproduced, and the acceleration is accelerated by the magnification of the test concentration D with respect to the actual machine concentration Da, and further by the magnification of the test flow velocity V with respect to the actual machine flow velocity Va. You can test.

In Atehamere to an example described above, actual concentration Da is 0.05 to 0.1 / Nm ³ mm, test concentration D is 2 mg / Nm ^3, actual velocity Va is 3 cm / s, the test flow velocity V 10 cm Therefore, compared with the case where the actual test is performed at the actual machine concentration Da and the actual machine flow velocity Va, the present test can be performed with the concentration accelerated by 20 to 40 times and the flow rate by 3.3 times. That is, when the predetermined period for the periodic inspection of the gas turbine 100 is one year, the test time of about 3 to 6 days is sufficient. Therefore, the actual machine life of the filter 1 after cleaning can be accurately predicted in a shorter time.

  In addition, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The present invention is particularly useful for a gas turbine intake filter suitable for ultrasonic cleaning for reuse.

It is an expanded sectional view of the filter for gas turbine intake which is a 1st embodiment of the present invention. It is an expanded sectional view of the filter for gas turbine intake which is a 2nd embodiment of the present invention. It is an expanded sectional view of the filter for gas turbine intake which is a 3rd embodiment of the present invention. It is sectional drawing in the state by which the filter for gas turbine intake air which is 4th Embodiment of this invention was accommodated in the frame. It is an expanded sectional view of the filter for gas turbine intake of a 4th embodiment. It is a block diagram which shows schematic structure of the washing | cleaning system of the filter for gas turbine intake air which is 8th Embodiment of this invention. It is a figure which shows the characteristic of the powder for a test used with the lifetime prediction test method of the filter for gas turbine intake air which is 9th Embodiment of this invention. It is a figure which shows an example of the measurement result obtained at the density | concentration setting process in the lifetime prediction test method of 9th Embodiment. It is a figure which shows an example of the measurement result obtained at the flow-speed setting process in the lifetime prediction test method of the filter for gas turbine intake air which is 10th Embodiment of this invention. It is a side view showing a schematic structure of a general gas turbine. It is a principal part enlarged view of FIG. It is sectional drawing in the state by which the conventional filter for gas turbine intake was stored and hold | maintained at the frame. It is an expanded sectional view of the conventional filter for gas turbine intake. It is an expanded sectional view showing the excessive deformation state of the conventional gas turbine intake filter. It is a figure which shows the problem in the lifetime prediction test method of the conventional filter for gas turbine intake.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas turbine intake filter 2 1st filter medium 2a 1st layer 2b 2nd layer 3, 3 '2nd filter medium 100 Gas turbine 101 Compressor 102 Combustor 103 Turbine part 104 Intake part 110 Frame

Claims (13)

A first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium are laminated, and the air sucked into the inside from the outside of the gas turbine is passed through the air. A gas turbine intake filter that traps dust in the interior,
The first filter medium is a non-woven fabric made of polypropylene fiber, and the second filter medium is a non-woven cloth made of polyester fiber whose surface is coated with a polyolefin resin, or a non-woven cloth made of polyolefin resin fibers, and the air The gas turbine intake filter, wherein the second filter medium and the first filter medium are laminated in order from the upstream side with respect to the flow.   2. The gas turbine according to claim 1, wherein the first filter medium is formed by laminating a plurality of layers having different effective opening diameters, and an effective opening diameter of each layer is smaller toward a downstream side with respect to the air flow. Intake filter. A first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium are laminated, and the air sucked into the inside from the outside of the gas turbine is passed through the air. A gas turbine intake filter that traps dust in the interior,
The first filter medium is a nonwoven fabric made of polypropylene fibers in which a plurality of layers having different effective opening diameters are laminated, and the second filter medium is a nonwoven fabric made of polyester fibers whose surfaces are coated with a polyolefin resin, or polyolefin The first filter medium and the second filter medium are laminated in order from the upstream side with respect to the air flow, and the effective opening diameter of each layer of the first filter medium is the air flow. On the other hand, a gas turbine intake filter that is smaller on the downstream side. A first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium are laminated, and the air sucked into the inside from the outside of the gas turbine is passed through the air. A gas turbine intake filter that traps dust in the interior,
The first filter medium is a non-woven fabric made of polypropylene fiber, and the second filter medium is a non-woven cloth made of polyester fiber whose surface is coated with a polyolefin resin, or a non-woven cloth made of polyolefin resin fibers, and the air The gas turbine intake filter, wherein the second filter medium, the first filter medium, and the second filter medium are laminated in order from the upstream side with respect to the flow, and are folded in a pleat shape.   The gas turbine intake filter according to any one of claims 1 to 4, wherein the first filter medium and the second filter medium are joined by heat-sealing of the polyolefin resin.   The gas turbine intake filter according to any one of claims 1 to 5, wherein surfaces of fibers forming the first filter medium and the second filter medium are coated with an organic silicate compound. A first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium are laminated, and the air sucked into the inside from the outside of the gas turbine is passed through the air. A gas turbine intake filter cleaning method for cleaning a gas turbine intake filter that has captured dust therein,
An analysis step for analyzing the properties of the dust acid and base captured by the gas turbine intake filter, and a selection step for selecting a cleaning liquid to neutralize the dust properties obtained in the analysis step; A cleaning step of immersing the gas turbine intake filter in the cleaning liquid selected in the selection step and ultrasonically cleaning the gas turbine intake filter. A first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium are laminated, and the air sucked into the inside from the outside of the gas turbine is passed through the air. A gas turbine intake filter cleaning method for cleaning a gas turbine intake filter that has captured dust therein,
Based on the installation environment of the gas turbine, a determination step for determining the properties of the dust / acid captured by the gas turbine intake filter and the properties of the dust obtained in the determination step are neutralized. A gas turbine intake filter comprising: a selection step of selecting a cleaning liquid to be performed; and a cleaning step of ultrasonically cleaning the gas turbine intake filter by immersing the gas turbine intake filter in the cleaning liquid selected in the selection step. Cleaning method. The gas turbine intake filter cleaning system for cleaning a gas turbine intake filter according to claim 5, wherein air sucked into the air turbine from outside to inside is captured to collect dust in the air. ,
There is a storage tank for storing a cleaning solution whose standard state is weakly alkaline or neutral, and cleaning means for ultrasonic cleaning by immersing the gas turbine intake filter in the cleaning liquid in the storage tank; A gas turbine intake filter comprising: a circulating means that draws in and purifies the cleaning liquid, and injects an acidic solution or an alkaline solution into the cleaning liquid to return to the standard state, and then sends it back to the storage tank. Cleaning system. A first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium are laminated, and the air sucked into the inside from the outside of the gas turbine is passed through the air. In the gas turbine intake filter for capturing dust in the gas turbine intake filter, a gas turbine intake filter life prediction test method for predicting the actual life of the gas turbine intake filter,
The gas turbine intake filter has the second filter medium and the first filter medium laminated in order from the upstream side with respect to the air flow,
The powder having the same particle size distribution as the dust in the installation environment of the gas turbine is blown at different concentrations to the unused gas turbine intake filter at the actual flow velocity of the gas turbine, and the powder Is measured, and the correlation between the trapped amount ratio of the powder trapped in the first filter medium and the second filter medium is measured, and from this measurement result, the trap amount ratio at the actual machine concentration of the dust is approximately the same. A concentration setting step in which the maximum value of the concentrations indicating the capture amount ratio is set in advance as a test concentration;
A test process for blowing the powder with the test concentration set through the concentration setting process and the actual machine flow rate to the gas turbine intake filter to be tested,
A life prediction test method for a gas turbine intake filter characterized by comprising: A first filter medium and a second filter medium that suppresses deformation of the first filter medium and has an effective opening diameter larger than that of the first filter medium are laminated, and the air sucked into the inside from the outside of the gas turbine is passed through the air. In the gas turbine intake filter for capturing dust in the gas turbine intake filter, a gas turbine intake filter life prediction test method for predicting the actual life of the gas turbine intake filter,
The gas turbine intake filter has the second filter medium and the first filter medium laminated in order from the upstream side with respect to the air flow,
The powder having the same particle size distribution as the dust in the installation environment of the gas turbine is blown at different concentrations to the unused gas turbine intake filter at the actual flow velocity of the gas turbine, and the powder Is measured, and the correlation between the trapped amount ratio of the powder trapped in the first filter medium and the second filter medium is measured, and from this measurement result, the trap amount ratio at the actual machine concentration of the dust is approximately the same. A concentration setting step in which the maximum value of the concentrations indicating the capture amount ratio is set in advance as a test concentration;
The powder captured by the flow rate of the powder, the first filter medium, and the second filter medium by blowing the powder to the unused gas turbine intake filter at different flow rates at the test concentration. Measure the correlation with the captured amount ratio of the body, and from this measurement result, set the maximum value of the flow rate that shows the captured amount ratio at the same level as the actual device flow rate as the test flow rate. A flow rate setting process,
A test step of blowing the powder at the test concentration and the test flow rate set through the concentration setting step and the flow rate setting step and testing the gas turbine intake filter to be tested,
A life prediction test method for a gas turbine intake filter characterized by comprising:   The powder is prepared in advance for testing, the first classification having a uniform particle size distribution, the second classification in which the particle size distribution is biased toward the small particle size, or the third classification in which the particle size distribution is biased toward the large particle size. 12. The life prediction test method for a gas turbine intake filter according to claim 10, wherein the life prediction test method for the gas turbine intake filter is provided.   The life prediction test of the gas turbine intake filter according to any one of claims 10 to 12, wherein the gas turbine intake filter to be tested is ultrasonically cleaned after the dust is captured. Method.

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