JPH05285328A - Dust collector - Google Patents

Abstract

PURPOSE:To obtain a dust collector where even dust of small particles is col lected and pressure loss is small and a filter does not need replacing by installing chevron blade plates and groove-shaped collecting parts in a frame of a louver and between the blade plates, respectively, and arranging a water sprayer above the louver. CONSTITUTION:In a rectangular frame 8 of a louver 7 are installed a lot of blade plates having a section almost in the shape of a chevron parallel to each other and at intervals. And, in a passage 10 between them are installed plural groove-shaped collecting parts 11-13 for collecting dust and water. Further a water sprayer 4 is arranged upstream of the louver 7. And when water from the water sprayer 4 is sprayed on dust contg. air, dust particles are stuck to sprayed water and to which centrifugal force is easily applied and which are collected by the louver 7, After that, they strike on the blade plates 9 to change their direction and enter the grooved dust collecting part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover, and more particularly to a dust remover suitable for being installed in an air intake of a gas turbine or a building air conditioner.

[0002]

2. Description of the Related Art When air containing dust is sucked into a gas turbine, the air compressor section of the gas turbine is contaminated with the dust and the efficiency of the gas turbine is reduced. Therefore, a dust remover is installed at the air intake of the gas turbine. To remove dust. A conventional dust remover of this type usually has a double filter. This filter has the advantage of removing small dust particles,
Clogged by dust, pressure loss increases, and the performance of the gas turbine deteriorates. Therefore, a new filter must be replaced regularly. This not only involves the cost of the filter itself and the replacement work cost, but also requires the disposal of the filter when it is no longer needed.

[0003]

Therefore, according to the present invention, not only can dust of small particles be removed,
An object of the present invention is to provide a dust remover that has a small pressure loss and does not require replacement of a filter or the like.

[0004]

This object is to arrange a vane plate having a substantially V-shaped cross section in a vertical direction in a frame of a louver, and to provide a vertical direction along the vane plate between the vane plates. The problem is solved by forming a plurality of groove-shaped trapping portions for trapping dust and water, which are extended to, and arranging a water sprayer on the upstream side of the louver. In this case, it is desirable that the distance between the louver and the water sprayer be adjustable.

[0005]

By the water sprayer arranged on the upstream side of the louver, water is sprayed on the air containing dust, and the dust particles adhere to the sprayed water. Spray water and dust are separated from air by louvers. The sprayed water collides with dust in the louver in the louver and is deflected, is trapped by the groove-shaped trapping portion, falls downward along the trapping portion due to gravity, and is collected under the louver. On the other hand, the air exits the louver and is supplied to, for example, a gas turbine or a building air conditioner.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front view showing an example in which the dust remover according to the present invention is installed in an air intake duct of a gas turbine,
FIG. 2 is a plan view thereof. The air intake duct 2 of the gas turbine supported by the abutment 1 sucks in a large amount of air from its inlet. A wire mesh 3 and a current plate (not shown) are attached to this inlet. The wire net 3 removes large dust and prevents invasion of birds and insects. The straightening vane ensures that the air is uniformly sucked into the air intake duct 1.
A water sprayer 4 is further provided in the air intake duct 1. The water sprayer 4 has a nozzle 5 connected to a water tank (not shown). The nozzle 5 uniformly sprays water on the air flowing through the air intake duct 2. A hopper 6 is provided at the bottom of the air intake duct 2 below the nozzle 5. This hopper 6 receives excess spray water.

A louver 7 is arranged in the air intake duct 2 on the downstream side of the water sprayer 4. This louver 7 is shown in FIGS. FIG. 3 is a front view of the louver 7, that is, the louver 7 viewed from the upstream side in the air flow direction. FIG. 4 is a cross-sectional view of the louver 7 taken along the line IV-IV in FIG. The louver 7 has a rectangular frame 8 and this frame 8
It is provided with a large number of vanes 9 arranged vertically inside. The blades 9 are provided in parallel with each other and at a predetermined interval. As can be seen from FIG. 4, the vane plate 9 has a substantially V-shaped cross section, and a plurality of groove-shaped trapping portions 11, 1 for trapping dust and water are provided in the passageway 10 therebetween.
2 and 13 are provided. The capturing portions 11, 12, 13 extend in the vertical direction along the blades 9 and reach a not-shown auxiliary collecting trough provided in the lower portion of the louver 7. The catching portion 11 is formed in a mountain portion at the center of the dogleg-shaped vane plate 9,
It has the shape of a parallelogram groove. The traps 12 and 13 are respectively formed at the downstream end of the vane plate 9 and have the shape of a parallelogram or a triangular groove. On the downstream side of the louver 7, the air intake duct 2 is connected to the gas turbine.

The dust removing device having the above structure removes dust as follows. First, water is sprayed from the nozzle 5 of the water sprayer 4 onto air containing dust, and dust particles adhere to the sprayed water. In this case, the weight ratio of the spray water flow rate to the air flow rate is 0.02 to 0.25, for example. By attaching dust particles to the spray water, the weight of dust with small particles and dust with a very low concentration (small weight per unit volume) becomes large, and it becomes easy to receive centrifugal force.
The dust is easily captured by the louver 7. The spray water collides with the vane plate 9 in the louver 7 along with the dust and is deflected, is trapped by the groove-shaped trapping portions 11, 12, 13 and falls downward along the trapping portion due to gravity, and the lower portion of the louver 7 is caught. It is collected by the collection gutter. On the other hand, the air exits the louver and is supplied to, for example, a gas turbine or a building air conditioner.

As described above, the dust removing apparatus of the present invention sprays water on the air to make it easy to capture the dust therein.
Since this is captured and removed by the louver 7, the dust capture performance of the fine particles is very excellent despite the small pressure loss (air resistance). Furthermore, since clogging due to dust etc. does not occur, the louver 7
Does not cause deterioration of dust removal performance over time. Therefore, no replacement or disposal of parts is required.

Further, the air absorbs water until it becomes saturated,
Since it is cooled by the latent heat of vaporization of the absorbed moisture, the temperature drops. As a result, in the case of a gas turbine, the intake air flow rate (weight flow rate) increases, and as a result, the output increases.

5 to 9 show a modification of the water sprayer 4. In the case of the modified example of FIG. 5, the nozzle 5A of the water sprayer 4A is mounted rearward, that is, so that the water is sprayed toward the louver 7. In this case, the nozzle 5A may be arranged close to the louver 7, and the louver 7 may be washed with spray water. In the modification of FIGS. 6 and 7, the nozzle 5B of the water sprayer 4B is arranged above the duct 2 so that water can be sprayed over the entire cross section of the passage in the duct 2. Thereby, as can be seen in FIG. 7, the radial injection area of the nozzle 5B covers the entire cross section of the passage. In the case of the modified examples of FIGS. 8 and 9, the nozzle 5C is formed as a multi-hole nozzle or a slit nozzle for spraying water like the water curtain 14.
In this case, the multi-hole nozzle has a structure in which a large number of small holes are formed in the lower side of the tube, and the slit nozzle has a structure in which long and thin slits are formed in the lower side of the tube.

A plurality of water sprayers 4, 4A, 4B, 4C may be further arranged in the passage of the duct 2 in the front and rear direction or in the upper and lower direction, and different kinds of water sprayers 4, 4A, 4B, 4C are arranged in combination. May be.

In the above dust removing device, the distance between the water sprayer 4 and the louver 7 may be changed according to the flow velocity and flow rate of the air in the air intake duct. In this case, it is desirable to move the water sprayer 4 relative to the louver 7. Furthermore,
The shape, size, arrangement position, and number of the groove-shaped capturing portions 11, 12, 13 can be appropriately selected. Further, the dust removing device of the present invention can be installed not only in the air intake of the gas turbine but also in the air intake of the building air conditioner or the air intake of another device that sucks a large amount of air.

[0014]

As described above, the dust removing device of the present invention has a very high particulate trapping performance despite its small air resistance (pressure loss). Further, since the dust removal performance does not deteriorate with time, it is not necessary to replace the filter or dispose of it, and the running cost is very low.

[Brief description of drawings]

FIG. 1 is a view showing an air intake duct of a gas turbine in which a dust removing device according to the present invention is installed.

2 is a plan view of the air intake duct of FIG. 1. FIG.

FIG. 3 is a front view of a louver of the dust removing device.

4 is a cross-sectional view of the louver taken along the line IV-IV of FIG.

FIG. 5 is a view showing a modified example of the water sprayer.

FIG. 6 is a diagram showing another modification of the water sprayer.

7 is a cross-sectional view taken along the line VII-VII of FIG.

FIG. 8 is a diagram showing another modification of the water sprayer.

9 is a sectional view taken along line VIII-VIII in FIG.

[Explanation of symbols]

 1 Abutment 2 Air intake duct 3 Wire mesh 4 Water atomizer 5 Nozzle 6 Hopper 7 Louver 8 Frame 9 Blade plate 10 Passage 11, 12, 13 Capture part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiko Sato 3-14-21 Shibaura, Minato-ku, Tokyo Inside TEPCO Environmental Engineering Co., Ltd. (72) Inventor Shuichi Adachi 4-14-7 Hatchobori, Chuo-ku, Tokyo No. Ichichuo Building Sanki Louver Co., Ltd.

Claims (2)

[Claims] 1. A vane plate having a substantially V-shaped cross section is vertically arranged in a frame of a louver, and dust and water are trapped between the vane plates and extend vertically along the vane plate. A dust removing device, characterized in that a plurality of groove-shaped trapping portions for forming the groove are formed, and a water sprayer is arranged on the upstream side of the louver. 2. The dust remover according to claim 1, wherein the distance between the louver and the water sprayer is adjustable.