JPS6223532Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a filtration type dust collection device having a filter panel (dust collection layer) formed by filling and supporting granular filter media movably between supports in the device body. It is an object of the present invention to provide a dust collector which prevents granular filter media falling toward the upstream side of the upstream (front) support from being mixed into the dust collected by gravity settling.

The inventors of the present invention have already developed a method of filling granular filter media such as sand, gravel, and ceramics between supports in a movable manner.
We are developing a filtration type dust collector that uses a supporting filter panel to dry collect dust-containing exhaust gas. In this dust collector, a louver is generally used as a support on the upstream side, but in the conventional filter panel mounting structure, the granular filter material that falls upstream of the louver is collected by gravity sedimentation. It was not possible to reuse the collected dust by gravity because it was mixed into the particle size dust (for example, the dust contained in the exhaust gas from blast furnaces, converters, etc. is iron and iron oxide, (preferably).

The present invention was developed in view of the above points, and has a filter panel in which granular filter media is movably filled and supported between supports in the main body of the device, and gravity sedimentation occurs on the upstream side of the filter panel. In a dust collection device having a dust collection hopper, vertical or nearly vertical porous baffles are arranged close to the upstream support between the upstream support and the gravity sedimentation collection dust hopper, and the opening positions thereof are mutually arranged. By providing multiple filters in a staggered manner, the granular filter media that falls upstream of the louver falls into the hopper below the granular filter media layer.
The object of the present invention is to provide a dust collector having a function of preventing a filter material from being mixed into the dust collected by gravity sedimentation, which is stored and collected by gravity sedimentation.

Hereinafter, the configuration of the present invention will be explained based on embodiments shown in the drawings. Reference numeral 1 denotes a dust collector main body, and a filter panel 3 is formed by filling and supporting a granular filter material 2 such as sand, gravel, ceramics, ore, or refractory material in the device main body 1 so as to be movable between supports. Forms a dust collection layer. As mentioned above, the louver 4 is generally used as the upstream support, and as the downstream support, it has excellent wear resistance and pressure resistance.
Generally, punched metal 5 is used, which has the advantage of improving the flow condition of the granular filter medium. A roll feeder 6 is provided at the lower end of the filter panel 3, and a filter material hopper 7 is provided below the roll feeder 6. A plurality of porous baffle plates 8 are provided vertically or almost vertically close to the upstream side of the upstream support body, that is, the louver 4, with opening positions shifted from each other, and gravity is applied to the upstream side of these baffle plates 8. Sedimentation collection dust hopper 9
will be provided. Large particle diameter dust in the dust-containing exhaust gas introduced into the apparatus main body 1 settles due to its own weight and is stored in the dust hopper 9. A plurality of baffle plates are provided as described above. 2 in the drawing
In this case, even if the granular filter material 2 that has scattered and fallen from the louver 4 passes between the baffles on the downstream side, it will hit the baffle plates on the upstream side and bounce back. They are placed at different positions from each other.

Since the dust collection device of the present invention is configured as described above, the granular filter material 2 moving downward between the louver 4 and the punching metal 5 may jump out (or spill out) from the tip of the louper 4. ) Even if the dust falls, it does not fall or get mixed into the collected dust by gravity settling as in conventional dust collectors, but it bounces off the baffle plate 8 and bounces off the filter panel 3.
Since the filter material falls into the filter material hopper 7 below, it is possible to prevent the granular filter material from being mixed into the gravity sedimentation collected dust, and the collected gravity sedimentation collection dust can be easily reused as is. have. For example, in the case of blast furnace dust, the gravity-sedimented dust is made up of coarse particles mainly composed of coke, and the filter-collected dust is made up of fine particles mainly composed of iron ore powder and oxidized iron. Coarse dust is recovered as a raw material for reduced iron making, so
Since contamination with filter media is prevented, there is no need for a separation process and it can be used directly.

[Brief explanation of the drawing]

The drawing is an explanatory view showing one embodiment of the dust collection device of the present invention. 1... Apparatus body, 2... Granular filter material, 3...
Filter panel, 4... Louver, 5... Punching metal, 6... Roll feeder, 7... Filter material hopper, 8... Baffle plate, 9... Gravity sedimentation collection dust hopper.

Claims (1)

[Scope of utility model registration request] In a dust collection device that has a filter panel in which agglomerated filter media is movably filled and supported between supports in the device body, and has a gravity sedimentation collection dust hopper on the upstream side of the filter panel, the dust hopper on the upstream side A filtration material characterized in that a plurality of vertical or nearly vertical porous baffles are provided between the support and the gravity sedimentation collection dust hopper in close proximity to the support on the upstream side, with opening positions shifted from each other. A dust collection device with a function to prevent dust from entering the collected dust by gravity.