JPH0361502B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collector, and more particularly to a dust collector having a hammered dust collector plate.

In a conventional electric precipitator, as shown in FIG. 1, for example, a plurality of pairs of dust collection electrodes 01 and discharge electrodes 02 are arranged parallel to the gas flow. The gas introduced between the two electrodes passes through a rectifying plate 03 in parallel between each pair of electrodes, and dust collection is performed between the electrodes. Such a conventional electrostatic precipitator has a drawback that, for example, when the electrode is hammered, the dust deposited on the electrode is scattered again by gas transport.

The present invention has been proposed in view of the above circumstances, and its purpose is to collect dust that can suppress the gas transport and re-scattering of the dust deposited on the dust collecting plate when the dust collecting plate is hammered. The goal is to provide equipment.

The dust collector according to the present invention includes dust collecting plates of 〓 type, < type, C type, etc., which are arranged parallel to the gas flow at regular intervals with openings facing each other.
The feature is that the pitches overlap when hammering, and by moving the dust collection plate during hammering and isolating the surface of the dust collection plate with dust attached from the main gas flow,
The above-mentioned conventional drawbacks can be solved by suppressing gas transport and re-scattering of dust particles when hammering the dust collecting plate.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2A and B are plan views each showing the configuration of one embodiment of the present invention, FIGS. 3A and B are plan views each showing the structure of another embodiment of the present invention, and FIG.
FIG. 5 is a partial perspective view of one embodiment shown in FIG. A, and FIG. 5 is a partial perspective view showing the structure of still another embodiment of the present invention.

In Figures 2A and B to Figure 5, 1 is a dust collection plate on the upstream side of the gas flow, 2 is a dust collection plate on the downstream side, 3 is a connecting bar, 4 and 5 are discharge electrodes, 6 is a dust collection electrode, and 7 is a high voltage power supply.

As shown in Figure 2A, U-shaped dust collecting plates 1 and 2
The openings are arranged parallel to the gas flow at regular intervals with their openings facing each other, and when collecting dust, the dust collectors pass between the U-shaped dust collection plates 1 on the upstream side of the gas flow. The dust-containing gas flows toward the center of the opening of the U-shaped dust collection plate 2 on the downstream side of the gas flow, and then flows from there toward the center of the dust collection plate 1, and dust adheres to these center parts. It is designed to be deposited. In addition, when hammering, as shown in FIG. U-shaped dust collecting plates 1 on the upstream and downstream sides,
The two pitches overlap each other, and the openings of the dust collecting plates 1 and 2 face each other, so that the openings form a space isolated from the main gas flow.

The shapes of the dust collecting plates 1 and 2 in the present invention are not only U-shaped as shown in FIGS. It may be formed into a shape similar to the above, or C-shaped, or other similar shape having a recess at least in its center.

As shown in FIG. 4, for example, these dust collecting plates 1 and 2 are arranged at regular intervals parallel to each other in a direction perpendicular to the gas flow using connecting bars 3. , 2 are hammered by a suitable hammering mechanism (not shown), and at least one of them is moved parallel to the arrangement direction by a moving mechanism (not shown) to shift the pitch between them. It is structured so that it can be stacked or stacked.

Further, in each of the above embodiments of the present invention, an inertial dust collector plate is described in which no high voltage is applied between each dust collector plate, but the present invention is not limited to the above embodiments, and, for example, these dust collector plates It can also be applied to electrostatic precipitators that apply a high voltage between them. What is shown in FIG. 5 is an example in which the present invention is applied to an electrostatic precipitator. In this case, the dust collecting plate on either the upstream side or the downstream side of the gas flow is used as a discharge electrode,
The other may be configured to serve as a dust collection pole. Fifth
In the figure, 4 and 5 are respective discharge electrodes, and this medium discharge electrode 4 has an opening end formed into a blade shape (even if the blade shape is not particularly sharp, it can be cut if the plate thickness is 2 to 3 mm or less). (It is sufficient if it is as sharp as a cut made by a machine), or the discharge electrode 5 has a thorn at the opening end as shown, and the other dust collection electrode 6 has a sharpness at the opening end to prevent discharge. It is desirable to configure it with a rounded radius. The above-mentioned discharge electrodes 4, 5 are connected to a high voltage power supply 7, and the dust collecting electrode 6 is grounded, and a high voltage is applied between these discharge electrodes 4, 5 and the dust collecting electrode 6 to create an electrostatic precipitator. Configure. In this case, the shapes and arrangement of the discharge electrodes 4, 5 and the dust collecting electrode 6 are the same as those explained for the dust collecting plates 1, 2 shown in FIGS. 2A, B to 4 above, respectively. The explanation will be omitted. In the electrostatic precipitator shown in FIG. 5, when collecting dust, the pitch of each discharge electrode 4, 5 and the pitch of the dust collecting electrode 6 are shifted to charge and collect as shown in FIG. 2A. If using a hammer, turn off the high voltage power supply 7 beforehand.
The discharge electrodes 4, 5 and the dust collection electrode 6 are hammered by a hammering mechanism (not shown) so that the pitches of the discharge electrodes 4 and 5 and the dust collection electrode 6 overlap as shown in FIG. 2B.

In each of the above embodiments, when hammering, as shown in FIG. 2, the pitches of the dust collecting plates 1, 2 (in the case of FIG. 5, the discharge electrodes 4, 5 and the dust collecting electrode 6) overlap each other. In this way, the space surrounded by each dust collection plate 1, 2 is isolated from the main gas flow, but in this case, the openings of each dust collection plate 1, 2 are closely connected to each other. Alternatively, the openings may be opposed to each other with a large gap between them, and further, for example, the dust collecting plate 1 on the upstream side of the gas flow (in the case of FIG. 5, the discharge electrodes 4 and 5) The opening width of the dust collecting plate 2 (in the case of FIG. 5, the dust collecting electrode 6) is made larger than that of the dust collecting plate 2 so that the opening of the dust collecting plate 2 fits into the opening of the dust collecting plate 1. The space surrounded by the dust collecting plates 1 and 2 may be isolated from the main gas flow.

Furthermore, in each of the above embodiments, each dust collection plate 1,
2 (in the case of Fig. 5, discharge electrodes 4, 5 and dust collection electrode 6)
We have explained that the pairs are arranged in pairs in the gas flow direction, but these pairs are arranged in multiple stages in the gas flow direction, and only in the case of hammering, some of them are arranged so that the pitches overlap with each other. may be configured.

The operation of each embodiment of the present invention described above will be explained.

When performing inertial dust collection using an inertial dust collector as shown in Figure 2 A, B and Figure 3 A, B, and when performing electrostatic dust collection using an electrostatic precipitator as shown in Figure 5. In either case, the dust is collected in a recess in the center of the downstream dust collecting plate 2 (the dust collecting electrode 6 in FIG. 5). When hammering, at least one of the dust collection plates 1 or 2 is moved by the movement mechanism of the dust collection plates.
are moved so that the pitches overlap one another, thereby isolating the space surrounded by the dust collecting plates 1, 2 from the main gas flow. In this case, in the example shown in FIG. 5, the high voltage power supply 7 is turned off in advance before moving either the discharge electrodes 4, 5 or the dust collecting electrode 6. In this way, by hammering with the opposed dust collection plates stacked one on top of the other, the dust separated by the hammering will be transported downward through the isolated space without being carried away by the gas flow or re-dispersed. It will fall and be collected as dust.

As described above, according to the present invention, the re-scattered dust caused by hammering, which is said to be 30 to 70% of the amount of dust particles at the outlet of the dust collector, is suppressed, so that the performance of the dust collector can be significantly improved. Furthermore, by installing the device according to the present invention, for example, on the inlet side of an electrostatic precipitator, it is possible to perform a rectification function (a function to make the gas velocity distribution uniform) essential to the electrostatic precipitator. Further, this provides excellent effects such as the ability to omit the conventional rectifying plate made of a perforated plate.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the configuration of a conventional electrostatic precipitator, FIGS. 2A and B are plan views each showing the configuration of an embodiment of the present invention, and FIGS. FIG. 4 is a partial perspective view of the embodiment shown in FIG. 2A, and FIG. 5 is a partial perspective view showing the configuration of still another embodiment of the present invention. 1, 2... Dust collection plate, 3... Connection bar, 4, 5...
...discharge electrode, 6 ... dust collection electrode, 7 ... high voltage power supply.

Claims (1)

[Claims] 1 〓 type, ＜
A dust collector characterized in that dust collecting plates of a type, C type, etc. are arranged so that the pitches thereof overlap when hammering.