JPH0311676Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an enclosure that covers a melting furnace for steel manufacturing and functions as dustproof and soundproof.

"Prior Art" Conventionally, an enclosure has been used as a soundproofing and dustproofing measure for a melting furnace for steel manufacturing, such as an arc furnace. This enclosure has a housing made of a sound insulating material that covers the outside of the melting furnace, and a dust collection duct with a suction port opened inside the housing, and the noise of the melting furnace is blocked by the sound insulating wall of the housing. The dust collection duct sucks the smoke and dust generated in the melting furnace to prevent the noise and dust from flowing out of the housing.

``Problems to be Solved by the Invention'' By the way, various opening/closing doors are provided on the housing, such as an entrance door for workers and an entrance/exit door for loading and unloading buckets, ladles, etc. Due to sudden changes in the state of smoke and dust generation, there is a risk that smoke and dust will leak from the gap between these opening/closing doors and the housing. Particularly, smoke and dust tend to leak out from the bucket door located in the upper part of the housing, that is, directly above the melting furnace, due to its own draft force. Therefore, in order to prevent such leakage, in conventional enclosures, it is necessary to increase the dust collection air volume (suction force of the dust collection duct) in the housing, which requires an increase in the size of the intake blower and This resulted in an increase in operating costs.

This idea was made in view of the above circumstances.
The purpose is to provide an economical enclosure with high dust collection efficiency.

``Means for Solving the Problems'' In order to achieve this objective, the enclosure of the present invention is provided with an auxiliary duct outside the housing, and a suction port of the auxiliary duct is connected between the opening and closing door and the housing. This is what I was asked to do.

"Function" According to the present invention, the auxiliary duct sucks and captures the smoke dust leaking from the gap, so the amount of dust collection air inside the housing can be reduced. Moreover, since the draft force of the smoke and dust passing through the gap is weakened, the suction force of the auxiliary duct may be smaller than the reduction in the dust collection air volume.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows a schematic structure of an enclosure according to the present invention, and reference numeral 1 in the figure indicates a housing. This housing 1 includes a sound-insulating side wall portion 1 surrounding a melting furnace (in this embodiment, an arc furnace for steelmaking) F.
a, and a sound-insulating top plate part 1b that closes off the upper part of the space surrounded by the side wall part 1a, and covers the outside of the melting furnace F to isolate it from the outside world. A dust collection duct 2 that penetrates the side wall 1a and opens into the housing 1 is connected to the housing 1. The dust collection duct 2 is connected to, for example, a dust collection filter and an intake blower (not shown) outside the housing 1, and is designed to suck smoke and dust inside the housing 1.

On the other hand, the top plate portion 1b is formed with a loading port 3 through which a bucket for loading scraps is brought in and out, and an opening/closing door 4 is placed over the loading port 3. This opening/closing door 4 is equipped with wheels 4a as shown in FIG.
It can be opened and closed by sliding in the horizontal direction (direction perpendicular to the plane of Figure 1). A hood 7 is provided to cover the gap 6 between the opening/closing door 4 and the housing 1 from the outside. This food 7
3, extends along the edge of the door 4 and surrounds the door 4 from three sides, and is further connected to the dust collection duct 2 via an auxiliary duct 8. That is, the hood 7 forms a suction port of the auxiliary duct 8, and this suction port extends along the extending direction of the gap 6 at a position facing the gap 6. Note that reference numerals 9 and 10 in FIG. 2 are sealing members, which seal between the opening/closing door 4 and the housing 1. However, the seal member 9 is slidable relative to the seal member 10.

Melting furnace F using the enclosure constructed in this way
When covered, most of the smoke and dust generated in the melting furnace F will be suctioned and captured by the dust collection duct 2 as shown by the arrow in Figure 1, and will also leak out of the housing 1 through the gap 6 as shown by the arrow in Figure 2. The auxiliary duct 8 sucks and captures the smoke and dust as shown by the arrow in FIG. Therefore, the dust collection air volume in the housing 1 can be set smaller than before, and leakage of smoke and dust can be prevented. Moreover, the smoke and dust trying to leak out of the housing 1,
Since the draft force is weakened by passing through the gap 6 and between the seal members 9 and 10, the dust collection air volume (suction force) of the auxiliary duct 8 can be made smaller than the reduction in the dust collection air volume in the housing 1. In other words,
Overall, the output of the intake blower connected to the dust collection duct 2 can be reduced, so the dust collection efficiency is improved.

In the above embodiment, the suction port of the auxiliary duct 8 is provided in the door 4 for the bucket, but the structure is not limited to this, and other doors on the housing, such as the entrance door for workers, etc. It may also be provided at the loading/unloading exit door of the ladle. In addition, the auxiliary duct 8 is not limited to a configuration where it branches off from the dust collection duct 2;
It may be configured to connect to a separate blower from the blower of the dust collection duct 2.

"Effects of the invention" As explained above, according to the invention, an auxiliary duct is provided outside the housing, and the suction port of this auxiliary duct faces the gap between the opening/closing door and the housing. The auxiliary duct sucks and captures the smoke and dust leaking from between the pipes. Therefore, the amount of dust collection air inside the housing can be reduced, and leakage of smoke and dust can be reliably prevented. However, since the draft force of the smoke and dust passing through the gap is weakened, the suction force of the auxiliary duct may be smaller than the decrease in the dust collection air volume in the housing. In other words, the output of the intake blower, etc. can be made smaller than before, which improves dust collection efficiency.
It is possible to obtain an enclosure that is economical in terms of equipment costs, operating costs, etc.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a vertical sectional view, Figure 2 being an enlarged sectional view of the portion indicated by the chain line in Figure 1, and Figure 3 being a plan view. . DESCRIPTION OF SYMBOLS 1...Housing, 1b...Top plate part, 2...Dust collection duct, 4...Opening/closing door, 6...Between, 7...Hood, 8...Auxiliary duct, 9, 10...Sealing member, F... Melting furnace (arc furnace).

Claims (1)

[Scope of utility model registration request] It is equipped with a housing that covers the outside of the melting furnace, a dust collection duct that opens into the housing, and an opening/closing door provided on the housing. An enclosure for a melting furnace characterized by being provided with an auxiliary duct with a facing opening.