JP3649546B2 - Filter device for gas turbine power generation equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention generally relates to a filter device installed outdoors, and particularly relates to a filter device for gas turbine power generation equipment having two systems of filters for a gas turbine and a generator.
[0002]
[Prior art]
The gas turbine needs at least combustion air sucked into the engine and cooling air for cooling and ventilating the generator, and these airs need to clean the outside air through a filter. However, since the combustion air requires highly purified air, the cooling air does not require as clean as the combustion air. In most cases, as shown in FIG. 7, only the gas turbine combustion air is cleaned.
Here, a conventional general gas turbine power generation facility shown in FIG. 7 will be briefly described. A typical outdoor-installed gas turbine power generation facility includes an enclosure 26 in which a gas turbine 27 and its generator 28 are housed, and a filter device installed on the upper surface thereof. The filter device 29 is mainly composed of a chamber and a filter housed in the chamber. The filter device 29 is mainly provided with an opening on one side such as the front surface of the chamber, and the outside air taken from the opening is used as a floor surface in the chamber. The gas is purified through a filter installed perpendicularly to the gas turbine 27 and supplied to the gas turbine 27 as gas turbine combustion air. In addition, outside air intakes 30 and 31 for cooling air for cooling the generator 28 are provided at appropriate positions on the side surface of the enclosure 26. The intake ports 30 and 31 are provided with a coarse dust filter (not shown) to prevent relatively large dust from being caught in the intake air.
As described above, the filter device 29 shown in FIG. 7 has a function of purifying only the gas turbine combustion air using one system of filters.
[0003]
On the other hand, Japanese Patent Laid-Open No. 53-125516 discloses a filter device for processing generator cooling air simultaneously with gas turbine combustion air. This filter device has a mechanism for distributing and supplying clean air processed using a single-line filter for gas turbine combustion and generator cooling.
[0004]
[Problems to be solved by the invention]
In the case of the conventional general filter device shown in FIG. 7, the generator cooling air is not subject to processing, and the cooling air is purified using a coarse dust filter provided at the outside air intake of the enclosure. It is only a simple thing to do, and relatively fine dust passing through this filter will be taken in by the intake air and will enter the enclosure. Therefore, in the conventional gas turbine power generation equipment, it is necessary to perform maintenance (cleaning) inside the generator at a relatively high frequency, and in that case, it is necessary to disassemble the generator, etc. There was a problem that it decreased.
Further, in the filter device disclosed in Japanese Patent Application Laid-Open No. 53-125516, the gas turbine combustion air and the generator cooling air are simultaneously processed by a single system of filter. Since the same high cleanliness air as the combustion air is supplied, the problems of the prior art can be solved, but the cleanliness required for the generator cooling air to solve the above problems can be solved. Considering the level, it means that the cleaning is extremely excessive, and there is a problem in the efficiency of the equipment.
In addition, in the case of a filter device having a mechanism that simultaneously processes gas turbine combustion air and generator cooling air with a single system filter, it processes about twice as much air volume as that of a mechanism that processes only combustion air. Must. In order to obtain twice the air volume, it is necessary to double the number of filter cells installed vertically on the floor in the chamber. However, if there is a single filter, the filter cell should be installed on the same vertical plane. Therefore, the outer shape of the filter device is remarkably enlarged, and there is a problem that it cannot be installed when installed on the upper surface of the enclosure like an outdoor gas turbine power generation facility.
Further, in the case of a filter device having a mechanism in which an opening for taking in outside air is provided only on one side such as the front surface of the chamber, it is necessary to take in a large amount of outside air as in the case of processing combustion air and cooling air at the same time. If there is, there is a problem that the area of the outside air intake opening becomes insufficient, and the wind speed of the intake air increases, the suction resistance increases, and foreign matters such as rain, snow, and dust are easily caught. is there.
Further, in the case of a filter device having a mechanism in which an opening for taking in outside air is provided only on one side such as the front surface of the chamber, outside air is sucked in from the outside air suction port in the horizontal direction, so that rainwater is easily caught in the intake air. Therefore, a mechanism for providing rain louvers or the like and separating the raindrops caught by colliding with the baffle plate is required, and there is a problem that the intake efficiency is lowered. Further, there is a problem in that snow is easily caught from the intake / intake port, and snow adheres to the baffle plate to impair the function of the baffle plate. In order to solve the above problem, there is a means for opening the emergency damper downstream of the filter and directly taking in the outside air to restore the intake efficiency. However, dirty air that does not pass through the filter flows in as treated air. Therefore, various problems occur after inhalation, which is not a preferable measure.
[0005]
In order to solve the above-described problems, the present invention provides a filter device for separately purifying gas turbine combustion air and generator cooling air in two systems of filters mounted in the same filter chamber, An object of the present invention is to provide a filter device for gas turbine power generation equipment that is compact and can save space, and that can sufficiently supply purified air suitable for a gas turbine and a generator, and that can be easily maintained. .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the filter device for a gas turbine power generation facility according to the first aspect of the present invention includes a filter chamber for gas turbine combustion air on the left and right sides of a central chamber inside a box-shaped chamber, and A filter device for forming a filter chamber for a generator, wherein the gas turbine combustion air filter chamber is disposed on the outer side of the medium performance filter disposed on the central chamber side and the medium performance filter with an appropriate interval therebetween. A high-performance filter to be stored; the generator filter chamber stores a medium-performance filter on the central chamber side; and the central chamber has air intake openings on the front and rear surfaces and the lower surface of the chamber. The high performance filter of the gas turbine combustion air filter chamber communicates with the gas turbine side, and the medium performance filter of the generator filter chamber communicates with the generator side. .
A filter device for a gas turbine power generation facility according to a second aspect of the present invention is the filter device for a gas turbine power generation facility according to the first aspect, wherein an air intake opening formed in a lower surface of the central chamber has an air And a flat plate member having a large number of small holes through which rainwater and the like can be circulated and at least capable of walking by humans.
A gas turbine power generation facility filter device according to a third aspect of the present invention is the gas turbine power generation facility filter device according to the second aspect, wherein the flat plate member is an expanded metal.
The gas turbine power generation facility filter device according to a fourth aspect of the present invention is the gas turbine power generation facility filter device according to any one of the first to third aspects, wherein the central chamber is divided into two by a partition plate. One of the divided central chambers communicates with the medium performance filter of the gas turbine combustion air filter chamber, and the other communicates with the medium performance filter of the generator filter chamber.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The filter device for gas turbine power generation equipment of the present invention separates the outside air sucked from the air intake openings before and after the central chamber of the chamber into the gas turbine side and the generator side in the central chamber. The outside air to the gas turbine side is purified with a high-performance filter through a pre-filter and a medium-performance filter with high cleanliness, and then introduced into the gas turbine side as combustion air. On the other hand, the outside air to the generator side is introduced as cooling air for the generator through the prefilter and the medium performance filter. The reason why the high-performance filter is disposed only on the gas turbine side is that high-clean air is required for combustion of the gas turbine. The reason why the medium performance filter is required as the cooling air for the generator is as follows. In other words, the coarse dust filter that has been used in the past needs to clean the inside of the generator (maintenance) at a relatively high frequency, and it is necessary to disassemble the generator and the like. There is a problem that the rate also decreases. The medium performance filter can solve the above problems. As described above, clean air is sent to the gas turbine and the generator, respectively, and there are a plurality of outside air inlets, so that the whole can be compacted.
Here, in the filter device for gas turbine power generation equipment of the present invention, the area of the air intake opening is expanded without changing the size of the chamber by providing an air intake opening on the lower surface of the central chamber of the chamber. it can. Further, by providing a flat plate member having a small hole in the air intake opening provided on the lower surface, the drain hole is not required. Further, since the flat member is walked on by the person at the time of maintenance, the flat member is formed with sufficient strength to withstand this. In terms of strength, expanded metal is preferable to the punching plate, but the punching plate can also sufficiently withstand the human weight by reinforcement.
The filter device for gas turbine power generation equipment according to the present invention prevents the supply from being unbalanced so that a large amount of outside air is introduced only to one side, for example, the gas turbine side, by partitioning the central chamber with a partition plate. This eliminates the problem of incomplete cooling of the generator.
In the filter device for gas turbine power generation equipment according to the present invention, since the hood is installed at the air intake openings before and after the central chamber of the chamber, the intake flow is directed upward while the intake port is directed downward. In this way, the entry of rainwater, snow, etc. is prevented by the action of gravity. Further, by providing an inspection door in the chamber, it is easy to enter and exit the chamber, and the maintenance of the filter and the like can be facilitated.
[0008]
【Example】
Hereinafter, an embodiment of a filter device for gas turbine power generation equipment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 6, a box-shaped chamber 1 (enclosure) for accommodating a filter or the like has a portable structure in the present embodiment, and is provided with a hanger 18 and legs 19.
[0009]
As shown in FIG. 1 and FIG. 2, the chamber 1 is closed on almost the entire upper surface and one side surface, and the gas turbine filter chamber 2 and the generator filter chamber 3 are located in the central chamber 4 through the central chamber 4. The chamber 1 is partitioned and arranged. Air intake openings 20, 21, and 22 are formed in the front and rear and lower surfaces of the central chamber 4 of the chamber 1, respectively, and an opening 23 is formed in the side surface on the gas turbine filter chamber 2 side. Also, openings 24 and 25 are formed on the upper and lower surfaces of the chamber 1 on the generator filter chamber 3 side, and the upper opening 24 is closed by an upper door 16 as shown in FIG.
As shown in FIG. 1, the gas turbine filter chamber 2 includes a pre-filter 7 disposed on the left side of the central chamber 4, a medium performance filter 5 disposed adjacent thereto, and a medium performance filter 5. A high-performance filter 6 and the like that are disposed in the vicinity of the opening 23 with a space therebetween are disposed. In addition, the clean air which passed the high performance filter 6 is sent to the gas turbine side. As shown in FIG. 6, the high-performance filter 6 is a combination of a large number of filter cells 6 a and is disposed on the entire surface of the opening 23.
On the other hand, the generator filter chamber 3 includes a pre-filter 7 and a medium performance filter 8 disposed adjacent to the pre-filter 7. The pre-filter 7 removes relatively large dirt. The clean air that has passed through the medium performance filter 8 passes through the opening 25 on the lower surface and is sent to the generator side. The medium performance filters 5 and 8 and the pre-filter 7 are also a combination of a number of filter cells.
[0010]
As shown in FIG. 3, the air intake opening 22 on the lower surface of the central chamber 4 is closed by a flat plate member 10 having a small hole 9. The small hole 9 has a size that allows air and rainwater to pass through. Rainwater and the like that have entered the chamber 1 are discharged from the small hole 9.
In this embodiment, an expanded metal or a punching plate is used as the flat member 10. In the case of a conventional filter device, the lower surface (bottom surface) is a flat closing plate, so that rainwater or the like that has entered the chamber accumulates on the floor surface and corrodes the floor surface. Furthermore, there was a problem that rainwater collected on the floor surface was blown up and sucked to the filter side. In addition, there is an inconvenience that the feet slip due to rainwater collected on the floor during maintenance. In order to cope with such an inconvenience, measures such as providing a drain hole in a part of the floor surface have been taken, but it is not sufficient. Moreover, the hole formed in a floor surface needs to be a small hole which a bird and big garbage do not penetrate | invade. In this embodiment, in order to solve the above problems, the flat plate member 10 having the small holes 9 is provided by closing the air intake opening 22 on the lower surface of the chamber 1 as described above.
The flat member 10 may be any member that has a small hole and has a strength capable of supporting a human being. In this embodiment, a known expanded metal or punching plate is used. That is, as described above, the plate-like member 10 needs to be a mesh-structured plate, and it is necessary that the suction resistance of the small hole is as small as possible, and there are few horizontal surfaces that have moderate strength and are easy to collect rainwater. Is preferable. Therefore, an expanded metal or a punching plate is used, but the expanded metal is more preferable than the punching plate because it satisfies the requirements of the flat plate member 10 as they are.
An expanded metal is a well-known thing prescribed | regulated to JISG3351, and is manufactured from a steel plate by the cold-drawing method, A suitable rhombus-shaped small hole is formed and it consists of a shape with few horizontal surfaces. On the other hand, the punching plate is formed by punching and punching a plurality of round holes and other holes having the same shape on a relatively thin flat plate. Since it is generally a thin plate, it is necessary to reinforce it with a reinforcing member in order to support the human body.
[0011]
As shown by a two-dot chain line in FIGS. 1 and 2, a partition plate 11 that divides the central chamber 4 into two is provided in the central chamber 4. In general, since the amount of air used for the gas turbine is larger than the amount of air for the generator, a large amount of outside air introduced into the central chamber 4 is easily introduced into the gas turbine filter chamber 2 side. The amount introduced into the filter chamber 3 is reduced. For this reason, there is a problem that cooling of the generator becomes insufficient. The partition plate 11 solves this problem, and the balance of the air supply to both the gas turbine filter chamber 2 and the generator filter chamber 3 is made normal by the central chamber 4 partitioned by the partition plate 11. It becomes possible to keep on. In addition, it is preferable that the partition plate 11 is disposed at a position slightly away from the gas turbine side, and the exact position is appropriately determined according to the specifications of the gas turbine and the generator.
[0012]
As shown in FIGS. 4, 5, and 6, air suction tools 13 and 14 having a hood 12 that is inclined downward are detachably installed in the air intake openings 20 and 21 of the central chamber 4. As shown by the arrows in FIGS. 4 and 5, the outside air is introduced from below the hood 12 and is introduced into the chamber 1. The provision of the hood 12 prevents rainwater and snow from entering the chamber 1.
As shown in FIG. 6, an inspection door 15 for entering and exiting the inside of the chamber 1 is provided around the outside of the chamber 1. During maintenance such as filter replacement and inspection and repair of the gas turbine and generator, the chamber 1 can be easily entered and exited from the inspection door 15. Therefore, the work at the time of maintenance is easily performed. The filter is also exchanged from the upper door 16. Further, as shown in FIG. 6, on the outer surface side of the chamber 1, differential pressure gauges 17 for monitoring the increase in the filter differential pressure are arranged on the gas turbine filter chamber 2 side and the generator filter chamber 3 side, respectively.
[0013]
Next, the operation of the above embodiment of the present invention will be described. Outside air is introduced into the central chamber 4 from the air intake openings 20 and 21 of the air suction tools 13 and 14 before and after the central chamber 4 and from the small holes 9 of the flat plate member 10 on the lower surface of the chamber 1. When the partition plate 11 is not in the central chamber 4, the air introduced into the central chamber 4 is sent to both the gas turbine filter chamber 2 side and the generator filter chamber 3 side. The air introduced to the gas turbine filter chamber 2 side is cleaned by the medium performance filter 5 after coarse dust is removed by the pre-filter 7, and further purified by the filter cell 6a of the high performance filter 6, It is sent from the opening 23 to the gas turbine side and used as combustion air. On the other hand, the air introduced into the generator filter chamber 3 side is cleaned by the medium performance filter 8 after removing coarse dust by the pre-filter 7, and sent to the generator side from the opening 25. Cool and ventilate. As described above, since the chamber 1 is provided with a plurality of inlets, a large air intake is not required at one place as in the prior art. In addition, by increasing the overall opening area of the plurality of air intake ports, the wind speed of the intake air can be reduced, the suction resistance can be reduced, and the entry of foreign matters such as rain, snow, and dust can be suppressed. Further, since the filter is divided into the gas turbine filter chamber 2 and the generator filter chamber 3, the area of the filter itself can be reduced. Therefore, the entire chamber 1 can be reduced in size and space can be saved. Of course, since it is lightweight, it can be moved by using the hanging tool 18, and the leg 19 is installed at an arbitrary place by fixing it to the ceiling surface of the enclosure containing the gas turbine and the generator.
Further, by providing the partition plate 11 in the central chamber 4, as described above, the introduced air supply balance is normally maintained, and the necessary air is stably supplied to each of the gas turbine side and the generator side. Can do.
[0014]
【The invention's effect】
According to the filter device for gas turbine power generation equipment according to claim 1 of the present invention, the chamber can be downsized, the manufacturing cost can be kept low, the installation space can be reduced, and the on-site installation can be simplified. In addition, since a plurality of air intake openings are provided, the wind speed of the intake air is reduced, pressure loss is reduced, the intake efficiency can be improved, and intrusion of foreign matters such as rain, snow, and dust can be suppressed. . Further, since clean air suitable for the gas turbine and the generator can be supplied, the combustion of the gas turbine and the generator cooling are efficiently performed.
In addition, according to the filter device for a gas turbine power generation facility according to claims 2 to 3 of the present invention, outside air can be taken in from the lower surface of the chamber, and snow or the like adheres to the air inlet provided on the side surface of the chamber. Even if the opening area is reduced, there is no intake air shortage due to the intake air volume from the lower surface. Thereby, the stable intake is performed. Moreover, since a well-known expanded metal or punching board is used as a flat member, it can implement easily and cheaply.
According to the filter device for gas turbine power generation equipment according to claim 4 of the present invention, since the central chamber is divided by the partition plate, the supply balance of air to the gas turbine side and the generator side is normally maintained. Is done.
[Brief description of the drawings]
FIG. 1 is a front view of FIG. 6 showing an overall structure of a filter device for gas turbine power generation equipment according to an embodiment of the present invention. FIG. 2 is a diagram showing an internal structure of a filter device for gas turbine power generation equipment according to the embodiment. Fig. 3 is a back view of Fig. 6; Fig. 4 is a left side view of Fig. 6; Fig. 5 is a right side view of Fig. 6. Fig. 6 is a filter for gas turbine power generation equipment according to an embodiment of the present invention. FIG. 7 is a perspective view showing an outline of a conventional gas turbine power generation facility.
DESCRIPTION OF SYMBOLS 1 Chamber 2 Gas turbine filter room 3 Generator filter room 4 Central room 5 Medium performance filter 6 High performance filter 6a Filter cell 7 Prefilter 8 Medium performance filter 9 Small hole 10 Flat plate member 11 Partition plate 12 Hood 13 Air suction Tool 14 Air suction tool 15 Inspection door 16 Upper door 17 Differential pressure gauge 18 Lifting tool 19 Leg 20 Air intake opening 21 Air intake opening 22 Air intake opening 23 Opening 24 Opening 25 Opening

Claims (4)

A filter device for forming a gas turbine combustion air filter chamber and a generator filter chamber on the left and right sides of a central chamber inside a box-shaped chamber, the gas turbine combustion air filter chamber including the central chamber A medium performance filter disposed on the side and a high performance filter disposed on the outside of the room with an appropriate interval between the medium performance filter and the medium performance filter are housed in the generator chamber. The central chamber is formed with air intake openings on the front and rear surfaces and the lower surface of the chamber, and the high performance filter of the gas turbine combustion air filter chamber communicates with the gas turbine side, and the generator filter A filter device for gas turbine power generation equipment, wherein the medium performance filter of the chamber communicates with the generator side. The air intake opening formed in the lower surface of the central chamber has a plurality of small holes through which air, rainwater, etc. can flow and at least a flat plate member having a strength that allows humans to walk. The filter apparatus for gas turbine power generation equipment according to claim 1. The filter device for gas turbine power generation equipment according to claim 2, wherein the flat plate member is an expanded metal. The central chamber is divided into two by a partition plate, one of the divided central chambers communicates with the medium performance filter of the gas turbine combustion air filter chamber, and the other is the medium performance filter of the generator filter chamber The filter device for a gas turbine power generation facility according to any one of claims 1 to 3, wherein the filter device is in communication with the filter device.

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