JPH06277424A - Building dust collection - Google Patents

Abstract

PURPOSE:To collect dust in a building such as an electric furnace operates at a low running cost by allowing a mounted suction fan to such metal fume so that the fume is sent into a dust collection chamber nearby using a ceiling crane which travels at a metal fume generation site in a building, and further allowing the metal fume to pass through a dust collection filtration part installed in the dust collection chamber. CONSTITUTION:The building collection method is to move a ceiling crane with a mounted suction fan 6 so that the fan 6 is positioned above ascending metal fume 8, when the metal fume 8 is released into a building 1 during scrap feed or steel spouting at an electric furnace works. Then, the metal fume 8 which ascends is sucked by the suction fan 6 into a nearby dust collection chamber 4 before the metal fume 8 does not become dissipated. Further, the metal fume is allowed to pass through a dust collection filtration part 5 for the collection of the fume 8. Consequently, the suction air volume for sucking the metal fume is small and thereby the volume of an air discharged for dust collection 15 is small. Thus running cost for dust collection can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting metal fumes generated from a furnace, a ladle or the like in an electric furnace factory or the like.

[0002]

2. Description of the Related Art In an electric furnace or the like, the furnace lid is opened when scrap is charged or when steel is tapped, but at that time, metal fumes (smoke or dust containing fine particles of iron oxide) are generated. Also, when the scrap is melted, metal fumes are similarly generated around the electrodes and the furnace lid.

In the vicinity of an electric furnace or the like, it is often difficult for these metal fumes to collect dust locally due to mechanical and structural reasons. For this reason, the metal fume rises to the upper part of the building while being diffused by the draft formed inside the building, significantly deteriorating the working environment in the factory, and from the ventilation monitor provided in the building ceiling. , Is emitted in a reddish brown state and pollutes the external environment.

In order to prevent such a situation, conventionally, a dust collecting hood is arranged in the building monitor, and this dust collecting hood and a filter-type dust collector provided on the ground are connected by a dust collecting duct to collect dust. Or, an electric dust collector was installed at the top of the building to collect dust.

[0005]

However, the above-mentioned conventional building dust collection method has the following problems. That is, since it is necessary to aspirate the metal fumes that rise while diffusing and stay in the upper part of the building over the entire building, the amount of sucked air increases. Especially when installing a filter-type dust collector on the ground, use a large-capacity suction fan because the suction air volume is large and the pressure loss in the duct from the dust collecting hood to the dust collector is large. However, there is a problem that the running cost becomes extremely high.

In order to solve such a problem, there is also a method of installing an electric dust collector at the upper part of the building, utilizing a draft in the building, or guiding a metal fume to the electric dust collector by using a low pressure suction fan. It is taken. However, when using an electric dust collector, in order to ensure its dust collecting performance, the flow velocity of the gas in the dust collector before dust collection is 1 m.
Since it is necessary to keep the dust concentration at the inlet of the dust collector low and to keep the dust concentration at the same level or less per second, the metal fumes must be diffused as much as possible to make the dust concentration uniform before dust collection. Therefore, it is necessary to install a plurality of dust collectors over the entire building, and even in this case, there is a problem that the running cost becomes high.

The present invention has been made to solve the above-mentioned problems of the prior art, and provides a building dust collecting method capable of collecting dust in a building such as an electric furnace factory at a low running cost. It is intended to be provided.

[0008]

A method for collecting dust in a building according to the present invention is a method for collecting dust in a building along a longitudinal direction near a ceiling in a factory building.
A plurality of dust collection chambers that are partitioned by partition walls are provided, each dust collection chamber is provided with a dust collection filter unit, and an overhead crane equipped with a suction fan is placed inside the building to prevent the generation of metal fumes. This overhead crane is moved to a place where the metal fume is sucked by a suction fan equipped with a metal fume and sent to a nearby dust collection chamber. It collects dust.

[0009]

In the building dust collecting method according to the present invention, when scrap is charged or steel is tapped in an electric furnace factory or the like,
When the metal fume is discharged into the building, an overhead crane equipped with a suction fan is moved so that the suction fan is located above the rising metal fume. Then, the rising metal fumes are sucked by the suction fan and sent to a nearby dust collecting chamber before being diffused, and the metal fumes are collected through the dust collecting filter section arranged in the dust collecting chamber.

In this building dust collecting method, since the metal fumes are collected before they are diffused as described above, the amount of sucked air for sucking the metal fumes is small and the capacity of the dust collector is small. Therefore, the running cost for collecting dust can be reduced.

[0011]

EXAMPLE A building dust collecting method according to an example of the present invention will be described with reference to FIG. FIG. 1 (a) is a sectional view of a factory building for explaining this method of collecting dust, and FIG. 1 (b) is a plan view of the same factory building.

In this dust collection method of the building, the factory building 1
A plurality of dust collecting chambers 4 partitioned by partition walls 3 are provided along the longitudinal direction of the building 1 in the monitor unit 2 provided at the uppermost part of the building 1, and each dust collecting chamber 4 has a panel filter 5 for collecting dust.
And an overhead crane 7 equipped with a suction fan 6 is arranged in the upper part of the building 1. The overhead crane 7 is installed in the building 1 where the metal fume 8 is generated.
The suction fan 6 with the metal fume 8
Is sucked in and is sent to the nearby dust collecting chamber 4 through the louver portion 9. The metal fume 8 is guided by the partition wall 10 in the dust collection chamber 4 and flows from the lower side to the upper side of the panel type filter 5. At this time, the dust 11 of fine particles contained in the metal fume 8 is blocked by the panel filter 5 and falls into the hopper 12 provided below the dust collection chamber 4.
Then, it moves from the hopper 12 to the belt conveyor 13 for carrying out the dust 11 and is discharged outdoors.

On the other hand, the clean gas 14 which has been cleaned by removing the dust 11 is diffused into the atmosphere by the exhaust fan 15.

In the building dust collecting method of the embodiment of the present invention, as described above, the place where metal fumes are discharged in the building 1 is limited and the local dust can be collected intensively. The number is small and the running cost required for dust collection can be kept low.

[0015]

According to the present invention, the running cost for building dust collection can be kept low.

[Brief description of drawings]

FIG. 1A is a sectional view of a factory building illustrating a method of collecting dust in a building of an embodiment of the present invention, and FIG. 1B is a plan view of the factory building.

[Explanation of symbols]

 1 Factory Building 2 Monitor Part 3 Partition Wall 4 Dust Collection Room 5 Panel Filter 6 Suction Fan 7 Overhead Crane 8 Metal Fume 9 Louver Part 10 Bulkhead 11 Dust 12 Hopper 13 Belt Conveyor 14 Clean Gas 15 Air Discharger

Claims (1)

[Claims] 1. A plurality of dust collecting chambers partitioned by partition walls are provided along a longitudinal direction near a ceiling in a factory building, each dust collecting chamber is provided with a dust collecting filter, and a suction fan is mounted. This overhead crane is placed inside the building, and this ceiling crane is moved to a place where metal fumes are generated inside the building, and it is sucked by a suction fan equipped with metal fumes and sent to a nearby dust collection chamber. A method for collecting dust in a building, wherein metal fume is collected by passing it through a dust collecting filter provided in a dust collecting chamber.