JPS5833775Y2 - Filter media support structure - Google Patents

Description

[Detailed description of the invention] The present invention relates to a filter support structure in which a granular filter material for removing dust in exhaust gas is movably filled and supported between supports. It is an object of the present invention to provide a filter media support structure that can prevent dust from adhering to the filter.

As shown in FIG. 1, the inventors of the present invention used a dust-collecting layer 2 formed by movably filling and supporting a granular filter material 1 such as sand, gravel, or ceramics between supports. We are developing a filter-type dust collector that dry-collects exhaust gas.

In this dust collector, a louver-shaped support 3 is generally used as the upstream support, but dust adheres, accumulates, or collects near the tip (upper end) of the louver-shaped support 3 due to moisture in the exhaust gas. As a result, a dust accumulation layer 4 is formed as shown in FIG. 2, which not only increases ventilation resistance but also poses a problem in that it impedes the operation of the dust collector.

The present invention was devised to solve the above-mentioned problems, and the louver is constructed so that an appropriate amount of cleaned exhaust gas, nitrogen gas, or inert gas flows out near the tip of the louver-shaped support. It is an object of the present invention to provide a filter material support structure that facilitates the flow of exhaust gas near a louver-like support and prevents dust from adhering to the tip of the louver-like support.

Hereinafter, the configuration of the present invention will be explained based on embodiments shown in the drawings.

FIG. 3 shows an embodiment of the filter support structure of the present invention, and FIG. 4 shows a partially enlarged view of the filter support structure.

This filter support structure is constructed by movably filling and supporting granular filter media 1 such as sand, gravel, ceramics, ore, and refractories between supports.

Among the supports, at least the upstream support is a louver-shaped support 3, and the downstream support is punched metal.
Wire mesh, louvers, or a combination thereof may be used.

The drawing shows, as an example, a case where a punching metal 5 is used as the support on the downstream side, and the louver-shaped support 3 is the fifth
As shown in FIG. 6 and FIG. 6, a large number of steel strips are supported and fixed in parallel in an inclined manner at regular intervals.

A gas ejection vibro for preventing dust adhesion is attached near the upper end of the louver-shaped support 3 on the upstream side to eject filtered clean exhaust gas, nitrogen gas, or inert gas.

This ejection vibro is provided with a large number of ejection holes 7 as shown in FIG. 5 or ejection grooves 8 as shown in FIG. 6.

If dust accumulates one after another on the louver surface as in conventional filter support structures, the pressure loss of the gas in the dust collection layer will gradually increase, and the dust layer will eventually block the gas flow in front of the louver. This not only makes it impossible to operate due to the sudden increase in pressure loss, but also makes gas flow difficult.

Installing the cleaning device according to the present invention prevents dust from accumulating and keeps the flow of gas constant, thereby maintaining a constant dust load of gas entering the filtration layer, resulting in stable operation. This makes it possible to eliminate the factors that hinder operations on the blast furnace side.

Since the filter support structure of the present invention is configured as described above, cleaned exhaust gas, such as cleaned blast furnace exhaust gas, nitrogen gas, or inert gas, is allowed to flow into the jetting vibro, and When an appropriate amount of gas flows out from 7 or the blowout groove 8, these gases flow along the louver-shaped support 3 as shown by the arrows in FIG. For example, this has the effect of smoothing the flow of blast furnace exhaust gas and preventing dust from adhering to, accumulating, and growing on the louver-shaped support 3.

Therefore, the pressure loss when passing through the filter support structure can be kept small, and the dust collector has the advantage of being able to continue operating for a long period of time.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of a conventional filter media support structure;
Figure 2 is a partially enlarged view of the over-material support structure shown in Figure 1, and is an explanatory diagram showing the state in which dust is adhering to, accumulating, and elongating on the louver-shaped support. FIG. 4 is an enlarged view of a part of the filter support structure shown in FIG. 3, and FIG. FIG. 6 is a perspective view showing another example of the ejection pipe. DESCRIPTION OF SYMBOLS 1... Granular filter medium, 2... Dust collection layer, 3... Louver-shaped support, 4... Dust accumulation layer, 5... ...Punching metal, 6...
...Blowout pipe, 7...Blowout hole, 8...
...Ejection groove.

Claims (1)

[Scope of utility model registration request] In a filter material support structure in which a granular filter material for removing dust in exhaust gas is movably filled and supported between supports, at least the upstream Q support is a louver-shaped support, and the upstream Q support is a louver-shaped support. A filter support structure characterized in that a dust adhesion prevention gas jet pipe for jetting clean exhaust gas, nitrogen gas or inert gas after filtration is attached near the upper end of a louver-shaped support.