JPH06159093A - Intake air dust collector - Google Patents

Abstract

PURPOSE:To provide an intake air dust collector having no possibility of plugging and efficiently removing dust. CONSTITUTION:An intake dust collector is provided with a container-like filter chamber 2 for reserving a liq. at its lower part and having an outlet at its upper end part, and an intake duct 3 vertically inserted from the upper part to the center of the filter chamber and in which its lower end is located above the liq. level by a predetermined distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake dust collector for cleaning the air of a gas turbine or other compressor.

[0002]

2. Description of the Related Art In order to prevent the moving blades and stationary blades of compressors of gas turbines and various industrial compressors from being contaminated and worn by dust, dust floating in the air before being sucked is to be prevented. Needs to be removed.

Generally, the method for removing dust in the air is divided into an air filter and a dust collector depending on the amount of dust contained in the air. Use an air filter when the amount of dust is small, but use a dust collector when the amount is large.

Two examples of conventional air filter formats are shown in FIGS.

FIG. 8 shows a roll type dry / filter type roll-up type.
It is a filter called Matt. Filter chamber 11
Take-up roll 12 made of cotton cloth, glass wool, etc. inside
When the air passes through the filter cloth 13, dust (dust) is attached to the filter cloth 13, and the filter cloth with the dust is automatically wound at a slow speed.

FIG. 9 shows a cartridge type filter. A cartridge filter 14 made of bottomed cylindrical type sintered or the like is attached to the air inlet of the intake duct to filter dust. Dirt on the cartridge 14 is removed by blowing clean air into the cartridge filter from a blow pipe 15 attached to the cartridge filter 14 and backwashing it.

[0007]

The above conventional roll-up type roll-o-mat filter or cartridge type filter has the following problems. (A) Since it is a dry type, it cannot be applied to dust with moisture because the filter membrane is blocked. (B) It is necessary to close the intake air (stop the gas turbine) during the replacement of the filter or the backwash, and in the case of replacement, the maintenance cost of the filter medium increases. (C) If too much dust adheres, air resistance increases, pressure loss increases, and collection efficiency also decreases significantly.

[0008]

The present invention takes the following means in order to solve the above problems. (1) A container-shaped filter chamber having a liquid stored in the lower portion and an outlet at the upper end, and an intake air that penetrates through the center of the upper surface of the filter chamber and is inserted almost vertically from above and the lower end is at a predetermined distance from the surface of the liquid. An intake dust collector with a duct. (2) In the intake dust collector of the above (1), a liquid spraying device having a plurality of nozzles arranged downward at the upper part of the intake duct, and a circulation means provided between the lower part of the filter chamber and the liquid spraying device. And a dehumidifying device provided between the lower part of the intake duct and the inner wall of the filter chamber. (3) In the intake dust collector of the above (2), a first charging unit that is provided on the upstream side of the liquid spraying device and charges the dust with a certain polarity, and the sprayed liquid from the liquid spraying device and the inner wall of the intake duct. And a second charging means for applying a charge having a polarity different from the above to the flowing-down liquid.

[0009]

[Action]

(1) In the above-mentioned invention 1, the air containing dust enters from the upper part of the intake duct and blows from the lower end toward the liquid surface stored in the filter chamber. The air then redirects and exits at the upper end of the filter chamber. At this time,
Due to inertia, dust collides with the liquid surface and is adsorbed on the liquid film to remove dust. When the moisture content of air is high, the adsorption is more effectively performed and the dust is removed. (2) In the above invention 2, the liquid in the lower part of the filter chamber is sent to the liquid spraying device by the circulation means. Then, the liquid is sprayed downward from the nozzle of the spraying device. Air dust that has entered from the upper part of the intake duct is adsorbed by the droplets as it passes through the spray liquid.

Further, since the droplets flow down along the inner wall of the intake duct, dust that comes into contact with the inner wall is also adsorbed. Further, dust is adsorbed when passing through the droplet film that is dropped from the lower end of the intake duct.

After that, the air passes through the dehumidifying device, the increased humidity due to the liquid dispersion is dehumidified, and then exits from the outlet. Others have the same operation as the above (1). (3) Air dust is charged with a certain polarity by the first charging means. Further, the second charging means gives the sprayed liquid and the liquid flowing down from the intake duct an electric charge having a polarity different from that described above. Therefore, in the action of (2) above,
The dust is more strongly attracted to and scattered by the spray liquid and the falling liquid by the Coulomb force.

Therefore, dust is removed more strongly. Others have the same operation as the above (2).

[0013]

【Example】

 (1) An embodiment of the present invention 1 will be described with reference to FIG.

The filter chamber 2 has a container shape, and an air supply pipe 5 is connected to the outlet of the upper end portion. The intake duct 3 is vertically inserted from the center of the upper end surface of the filter chamber 2, and the lower end thereof is at a predetermined position from the liquid level of the water reservoir 4, that is, at an optimum adsorption height l.

The intake equipment 1 is connected to the upper end of the intake duct 3. The air supply pipe 5 is connected to a suction port of a compressor (not shown).

In the above, the air containing dust (dust) from the intake equipment 1 descends downward through the intake duct 3, changes its direction on the liquid surface, and exits from the upper outlet. At this time, the dust collides with the liquid surface due to inertia and is adsorbed on the water film of the water reservoir 4.

In this way, the dust is removed without being clogged as in the conventional apparatus, and the dust is discharged to the air supply pipe 5. (2) An embodiment of the present invention 2 will be described with reference to FIGS.

In FIG. 2, a spray water spraying device 6 having a plurality of nozzles directed downward is provided above the intake duct 3. Further, the circulation pump 8 is connected via a filter connected to the lower part of the filter chamber 2. The outlet of the circulation pump 8 is connected to the spray water spraying device 6. Further intake duct 3
If necessary, a dehumidifying device 9 is attached between the lower part of the filter and the inner wall of the filter chamber 2.

In the above, the water is sprayed from the nozzle of the spray water spraying device 6 in a conical shape as shown in FIG. 4, and is evenly distributed at the lower level I. This allows efficient contact with dust contained in the air.

As shown in FIG. 3, the water droplet g of the spray water comes into contact with the fine dust h while advancing downward, and is adsorbed and dripped into the water reservoir 4.

Further, as shown in FIG. 5, the water drops also drop while forming a water film i also on the inner wall of the intake duct 3. During this time, dust in the air that comes in contact with it is adsorbed, falls and drops into the water reservoir. Further, when the air passes through the water drop film j formed below the lower end of the intake duct 3 while changing its direction, the dust contacts the water drops and is adsorbed. Other functions are the same as those in (1) above.

After that, the air passes through the dehumidifying device 9, and the increased humidity due to the water spray is removed and sent out.

The water dropped in the water reservoir 4 is filtered by the filter 7 and is constantly sent by the circulation pump 8 to the spray water spraying device 6 to maintain the optimum water level.

As described above, dust is efficiently removed.
The dust-removed air is sent to the gas turbine. At this time, the intake air is cooled by the latent heat due to the evaporation of the spray water,
The performance of the gas turbine compressor is improved. (3) An embodiment of the present invention 3 will be described with reference to FIGS. 6 and 7.

In FIG. 1, an electrode 11 is provided in the intake equipment 1 near the upper end of the intake duct 3 and is connected to the discharge device 10. An electrode 12 is also provided in contact with the spray water spraying device 6. Furthermore, the electrode 13 that also contacts the intake duct 3
Is provided. The electrodes 12, 13 are also connected to the discharge device 10.

In the above, as shown in FIG. 7, the dust h in the intake air is unipolarly charged. In addition to spray water g +
Charge with polarity. Further, the falling water film i and the water drop film j are charged with + polarity.

While the dust h descends through the intake duct 3,
+ It is attracted by the Coulomb force to the spray water g charged with + polarity and adheres to the water droplets. In addition, the water film i charged to + polarity i
Similarly, the water droplet film j is also attracted and attached.

If the dust plus water droplet hg is a negative electrode, the water film j charged to + polarity is adsorbed. If it is a positive electrode, it will be pulled toward the water reservoir 4 by repulsion. If it is neutral, it is collected in the water reservoir 4 by water wash. Other functions are the same as those in (2) above.

In this way, the dust is removed more effectively.

The dust capturing efficiency can be finely controlled by controlling the following. (A) Discharge to dust (b) Charge to water film and water drop film (c) Intake height l (water surface water level control, duct wall vertical control)

[0031]

As described above, the present invention has the following effects. (1) In the case of Invention 1, (a) Since it does not pass through the intake filter membrane, pressure loss and replacement at the time of fouling become unnecessary, and maintenance costs do not increase.

(B) The dust trapping performance can be arbitrarily controlled by controlling the height between the outlet end of the intake duct and the water surface of the trapped water reservoir. (2) In the case of the second aspect of the invention (a) The minute dust of intake air adheres to the water droplets and the water droplet film and can be collected together with the water droplets.

(B) Due to the water film (water droplet distribution) in the space inside the intake duct, the water film on the duct wall surface, and the water film at the intake direction changing portion, dust is brought into multiple contact and the dust removal effect is improved.

(C) Since the dehumidifying device is provided, the increased amount of moisture is collected by the dehumidifying device and dropped into the trap water reservoir.

(D) Since the trapped water recirculation device is provided, the spray water can be continuously filtered and recirculated. Therefore, the spray water improves the efficiency of trapping dust. (3) In the case of the third aspect of the invention (a) The discharge causes dust to have a negative polarity, spray water droplets,
Since the water drop film and the water drop film of the intake duct are positively charged and dust is attracted to the water drop by the Coulomb force, the dust collection effect is significantly improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of an embodiment of the present invention 1.

FIG. 2 is a structural system diagram of one embodiment of the present invention 2.

FIG. 3 is an operation explanatory view of the same embodiment.

FIG. 4 is an operation explanatory view of the same embodiment.

FIG. 5 is an operation explanatory view of the same embodiment.

FIG. 6 is a structural system diagram of an embodiment of the present invention 3;

FIG. 7 is an operation explanatory view of the same embodiment.

FIG. 8 is a block diagram of a conventional example.

FIG. 9 is a configuration diagram of another conventional example.

[Explanation of symbols]

 1 Air intake equipment 2 Filter chamber 3 Air intake duct 4 Captured water reservoir 5 Air supply duct 6 Spray water spraying device 8 Circulating water pump 9 Dehumidifying device 10 Discharging device 11, 12, 13 Electrodes

Claims (3)

[Claims] 1. A container-shaped filter chamber having a lower part for accommodating liquid and having an outlet at an upper end, and penetrating through the center of the upper surface of the filter chamber and inserted substantially vertically from above, and the lower end is at a predetermined distance from the surface of the liquid. An intake dust collecting device comprising a certain intake duct. 2. The intake dust collecting apparatus according to claim 1, wherein a liquid spraying device is arranged at an upper part of the intake duct with a plurality of nozzles facing downward, and a circulation means provided between the lower part of the filter chamber and the liquid spraying device. And a dehumidifying device provided between the lower part of the intake duct and the inner wall of the filter chamber. 3. The intake dust collecting apparatus according to claim 2, wherein the first charging means is provided upstream of the liquid spraying device and charges the dust with a certain polarity, and the sprayed liquid from the liquid spraying device and the intake duct. An intake dust collecting device comprising: a second charging unit that applies a charge having a polarity different from the above to the flowing liquid on the inner wall.