JPS5925625B2 - Water film forming device for water film electrostatic precipitator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water film forming device for a water film type electrostatic precipitator used for collecting boiler dust, etc.

Conventionally, as this type of water film forming apparatus, an apparatus as shown in FIG. 1 (Japanese Unexamined Patent Publication No. 138769/1983) has been used.

To explain this with reference to the drawings, a dome-shaped part is provided on the upper part of the dust collection electrode a having a groove-shaped cross section, and a nozzle C is provided corresponding to the inner surface of this dome-shaped part.

Water d is injected from this nozzle C, thereby forming a water film e on the inner surface of the dome-shaped portion.

This water film e flows down along the inner surface of the dust collecting electrode a, washing away dust and the like adhering to the electrode a.

Note that f in the figure indicates a discharge electrode. Such a device is prized because it can reliably form a water film e within the dust collecting electrode a.

However, such a device had the following problems.

That is, (k) adjusting the mounting position of the nozzle C with respect to the dust collecting electrode a required precision and was troublesome.

(2) It was difficult to manufacture the inner curved surface of the dome-shaped part.

(3) When the water d is injected from the tip of the nozzle C, a part of the water d travels along the lower surface of the nozzle C and drips from the lower end g of the nozzle C.

It was difficult to prevent this dripping.

(4) When water films e are formed on both surfaces of the groove-shaped dust collection electrode a, the structure becomes complicated.

(5) The space occupied by the water film forming portion near the dust collection electrode a becomes thick.

This invention was made in view of the above-mentioned situation, and its purpose is to eliminate the need for high precision in adjusting the mounting position of the nozzle, to have a simple structure and to be easy to manufacture, and to eliminate the need for a nozzle such as the conventional example described above. To provide a water film forming device for a water film type electrostatic precipitator which has a simple structure with minimal dripping of water droplets and is capable of forming a water film over the entire surface of a grooved part of a dust collecting electrode.

To describe the structure of the present invention with reference to the drawings, in FIGS. 3 to 6, a dust collecting electrode 1 made of a flat plate is provided vertically upright, and on the upper part of the collecting electrode 1, horizontally,
A dispersing section 2 having an arcuate cross section is provided, and the upper remaining section 11 of the dust collecting electrode 1 is disposed vertically upward from the base of the dispersing section 2, and an injection A water film type electrical collector characterized in that a water pipe 4 having an opening 3 is provided, and the jetting opening 3 of the water pipe 4 is directed toward the upper surface of the dividing section 2 and is inclined toward the upper remaining section 11. This is a water film forming device for a dust machine.

Further, the water pipe 4 is provided above the dispersion section 2, and the injection port 3 is formed at the bottom of the water pipe 4.

In the figure, 5 is a guide electrode, 6 is a head tank, 7 is water,
Reference numeral 8 indicates a water film, and reference numeral 9 indicates a vertical center line of the water tube 4.

The injection ports 3 are formed in the water pipe 4 at appropriate intervals and, for example, at an angle of approximately 15 degrees with respect to the vertical centerline 9 thereof.

For the dispersion section 2, a portion 11 was obtained by dividing the periphery of the steel pipe in the axial direction.

As shown in FIG. 4, this water film forming apparatus is capable of simultaneously forming a water film on each of several dust collecting electrodes 1 as one block.

To describe the function of this device, first, the head tank 6
Water is sent from the water pipe 4 to the water pipe 4.

As a result, water 7 is injected from the injection port 3 of the water pipe 4, hits the dispersion section 2, spreads laterally on the dispersion section 2, and flows downward while bending in an arc shape in the vertical direction. The surface is wetted to form a uniform water film 8 thereon.

Further, when water droplets or the like fall on the surface of the dispersion section 2, the dispersion section 2 has the function of receiving the water droplets and guiding them onto the surface of the dust collection electrode 1 without scattering them.

Conventionally, there is a type in which water is stored behind the electrode and overflows towards the electrode. Although this type of type tends to form a water film on the electrode surface, it requires a large space to store water. It is disadvantageous in that it requires a small amount of water, and it is difficult to control the amount of water.

On the other hand, the method of supplying water using a water tube nozzle eliminates the above-mentioned drawbacks, but has the disadvantage that the water film forming part has a complicated structure.

Also, a stable water film cannot be formed unless a large amount of water is ejected at high speed.

This invention is structured as described above, with a flat dust collection electrode 1 standing up vertically, a dispersion section 2 having an arc-shaped cross section provided on the upper part, and a dispersion section 2 extending vertically upward from the boxwood root of the dispersion section 2. A water pipe 4 having an upper residual portion 11 disposed in the direction and having an injection port 3
is provided with its injection port 3 directed toward the upper surface of the dispersion section 2 and inclined in the direction of the upper remaining section 11, so that the upper remaining section 11 acts as a shielding wall, and a type using a water pipe; Although the water supply section has an extremely simple structure, the water film forming section can also have an extremely simple structure consisting of a combination of a flat plate and a dispersion section having an arcuate cross section.

Therefore, it is possible to dramatically facilitate the production of a water film forming type dust collection electrode.

Furthermore, since the injected water only needs to come into contact with the dispersion section 2 having an arcuate cross section, adjustment of the mounting position of the injection port 3 relative to the dispersion section 2 does not require much precision.

Furthermore, even if minute water droplets are scattered from the tip of the injection port 3, the dispersion section 2 can receive them and use them to form a water film, thus solving the conventional problem. can do.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a water film forming device of a conventional water film type electrostatic precipitator, Fig. 2 is a view taken along the line ■-■ in Fig. 1, and Figs. 3 to 6 are a diagram of the present invention. Fig. 3 is a view taken along the line ■-■ with a part of Fig. 4 omitted, and Fig. 4 is a plan view of a water film forming device of a water film type electrostatic precipitator. , Figure 5 is the fourth
FIG. 6 is a partial plan view of the device shown with the water tube removed from the device shown in the figure, and is a view taken along the line ■-■ in FIG. 4. 1... Dust collection electrode, 2... Dispersion section, 3
...Injection port, 4...Water pipe.

Claims (1)

[Claims] 1. A dust collection electrode made of a flat plate is provided vertically, and a dispersion part having an arc-shaped cross section is provided in the horizontal direction on the upper part of the dust collection electrode, and upward from the boxwood root of the dispersion part, disposing the upper remaining part of the dust collection electrode in a vertical direction;
Further, a water film type electricity is provided, wherein a water pipe having a jetting port is provided above the dispersion section, and the jetting port of the water pipe is directed toward the upper surface of the dispersion section and is inclined toward the upper remaining section. Water film forming device for dust collector.