JP5248136B2 - Dust scattering prevention device and dust scattering prevention method for bucket for coke dry fire extinguishing equipment - Google Patents

Description

  The present invention relates to a dust scattering prevention device and a dust scattering prevention method for a bucket for a coke dry fire extinguishing equipment, which is used to prevent the scattering of coke powder generated in the coke dry fire extinguishing equipment.

  Red hot coke that has been carbonized in a coke oven and extinguished from the coke oven is extinguished with an inert gas (for example, nitrogen gas) by a coke dry quenching (CDQ) method. In the method, a series of fire extinguishing steps are as follows. First, the red hot coke pushed out from the coke oven is received in a coke receiving bucket (hereinafter simply referred to as a bucket) mounted on a bucket carriage. Next, the bucket carriage is moved to the CDQ facility, and a bucket cover for preventing dust scattering and the like is attached to the upper part of the bucket. Next, the bucket integrated with the bucket cover is moved to the charging hopper at the top of the tower (hereinafter simply referred to as the chamber) that extinguishes and cools the red hot coke with a crane, and the bucket bottom and the chamber top are opened. The red hot coke inside is put into the chamber. In the chamber, red hot coke is extinguished and cooled by the circulating inert gas. Next, the empty bucket is separated from the charging hopper and lowered with a crane while being integrated with the bucket cover. Next, the bucket is separated from the bucket cover and mounted on the bucket carriage, and the fire extinguishing process ends. The bucket carriage loaded with the bucket moves to the corresponding position in the coke oven to receive the next red hot coke. In addition, the extinguished coke is cut out in a certain amount by a coke cutting device provided at the bottom of the chamber, and conveyed to a blast furnace.

  As a method for collecting the coke dust generated around the CDQ equipment in the series of red-hot coke fire extinguishing processes described above, the dust generation part is covered locally with a hood or the like, and the bucket movement range of the coke dry fire extinguishing equipment The dust is collected by covering the entire building or the like (for example, Patent Document 1).

JP 7-126644 A

  However, in the fire extinguishing process of the red hot coke, when the bucket cover is separated from the bucket, the coke powder remaining in the bucket is entrained by the thermal air current of the bucket and is unavoidably scattered as dust. .

  The present invention has been made in view of the above circumstances, and the problem is that it is possible to reliably collect the dust of coke powder remaining in the bucket, and to add red hot coke from the bucket to the chamber via the charging hopper. It is an object of the present invention to provide a dust scattering prevention device and a dust scattering prevention method for a bucket for a coke dry-type fire extinguishing facility that can collect dust in the bucket even during the charging process and that can reduce costs.

  In order to solve the above problems, a dust scattering prevention device for a coke dry fire extinguishing equipment bucket according to the present invention is a coke dry fire extinguishing equipment provided with a bucket cover that covers the upper part of the bucket for receiving red hot coke and transporting it to the chamber. A dust scattering prevention device for a bucket for a vehicle, wherein a dust collecting device is provided on the bucket cover, and the dust collecting device includes a dust discharge port for collecting the coke powder in the bucket.

  The operation and effect of the dust scattering prevention device for the coke dry fire extinguishing equipment bucket having such a configuration will be described. In the dust scattering prevention apparatus described above, the dust collector is provided on the bucket cover that covers the upper part of the bucket for receiving the red-hot coke and transporting it to the chamber. A dust outlet is provided to collect dust. According to this configuration, the dust collector can collect the coke powder remaining in the empty bucket after the red hot coke is put into the chamber from the dust discharge port, accompanied by the dust collection airflow. As a result, when the empty bucket after the red hot coke is introduced into the chamber is separated from the bucket cover, and when the empty bucket from which the bucket cover has been separated is moved to the coke oven by the bucket carriage, it remains in the bucket so far. It is possible to reliably prevent the coke powder and the coke powder adhering to the inner surface of the bucket from being scattered as dust. Moreover, according to the dust scattering prevention apparatus which concerns on this invention, compared with the apparatus which covers the whole building and prevents scattering of dust, an installation is compact and cost is suppressed low. Here, the dust collector provided in the bucket cover does not include a dust collection pump or dust collection duct for collecting dust, and these dust collection pumps and dust collection ducts are provided in a place other than the bucket cover. Shall be.

  In the dust scattering prevention apparatus for a coke dry fire extinguishing equipment bucket according to the present invention, it is preferable that the bucket cover is provided with at least one pair of outside air intakes.

  According to this structure, outside air can be taken in from the outside air inlet provided in at least one pair in the bucket cover. This prevents the inside of the bucket from becoming negative pressure due to collecting the coke powder from the dust discharge port by the dust collector, and prevents the dust collection ability from being lowered. Since the coke powder adhering to the coke can be guided to the dust outlet, the coke powder in the bucket can be reliably prevented from being scattered as dust.

  In the dust scattering prevention apparatus for a coke dry fire extinguishing equipment bucket according to the present invention, the dust discharge port is provided in a central portion of the bucket cover, and the pair of outside air intake ports are peripheral portions of the bucket cover, It is preferable that they are provided at positions facing each other across the central portion.

  According to this configuration, since the outside air inlet is provided at the peripheral edge of the bucket cover, the outside air taken in flows downward while taking in coke powder that is attached to the side wall surface in the bucket and is likely to scatter. . And the outside air which flowed downward collides with the bottom part in a bucket, and flows into the bottom center part. Further, since the pair of outside air intake ports are provided at the peripheral edge portions of the bucket cover and facing each other across the central portion of the bucket cover, the side wall surfaces at the opposing positions in the bucket are directed downward. The pair of outside air that has flowed collides at the center of the bottom of the bucket and moves upward (in the direction of the bucket cover) along the central axis of the bucket. Thereby, the coke powder in the bucket taken in by the outside air can be efficiently collected from the dust discharge port provided in the central portion of the bucket cover.

In order to solve the above problems, the dust scattering prevention method for the coke dry fire extinguishing equipment bucket according to the present invention is a dust discharge port provided in a bucket cover that covers the upper part of the bucket for receiving red hot coke and transporting it to the chamber. From the above, start collecting the coke powder in the bucket,
After dust collection starts, outside air is taken in from an outside air inlet provided in the bucket cover.

  According to this configuration, first, the dust collection of the coke powder accompanying the rising air flow in the bucket is started from the dust discharge port provided in the bucket cover covering the upper part of the bucket. After starting dust collection, by taking in outside air from the outside air intake provided in the bucket cover, the dust inside the bucket becomes negative pressure as the coke powder is collected from the dust outlet, and the dust collection capacity is reduced. By preventing dust from falling and causing dust collection airflow, coke powder adhering to the inner surface of the bucket can be entrained and guided to the dust discharge port, so that the coke powder in the bucket is scattered as dust. It can be surely prevented.

  In the dust scattering prevention method for a coke dry fire extinguishing equipment bucket according to the present invention, it is preferable that the bucket cover is separated from the bucket while dust collection is continued after the dust collection is started.

  According to this configuration, when separating the bucket cover from the bucket, by continuing to collect dust from the dust discharge port, it is possible to take in outside air from the gap between the bucket and the bucket cover. It is possible to reliably prevent the dust from being scattered.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of a dust scattering prevention device and a dust scattering prevention method for a coke dry fire extinguishing equipment bucket according to the present invention will be described with reference to the drawings.

  First, a series of processes for extinguishing red hot coke using a CDQ facility will be described. FIG. 1 is a schematic diagram for explaining a fire extinguishing process of red hot coke by a CDQ facility. The red hot coke 1 pushed out from a coke oven (not shown) is received by a bucket 3 mounted on a bucket carriage 2. Next, the bucket carriage 2 is moved along the bucket carriage road to the CDQ facility, and the bucket cover 4 for preventing dust scattering and the like is attached to the upper part of the bucket 3. Next, the bucket 3 and the bucket cover 4 are integrated and moved to the charging hopper 7 at the top of the chamber 6 using the crane 5, the bottom of the bucket 3 and the top of the chamber 6 are opened, and the red hot coke 1 in the bucket 3 is removed. Fire is extinguished by charging the chamber 6 through the charging hopper 7. In the chamber 6, the red hot coke 1 is extinguished and cooled by the circulating inert gas.

  Next, how the coke powder in the bucket 3 is scattered as dust will be described with reference to the schematic diagram of FIG. As shown in FIG. 2, the extinguished coke 9 is cut out in a certain amount by a coke cutting device 8 provided at the bottom of the chamber 6, and conveyed to a blast furnace (not shown). The red hot coke 1 is put into the chamber 6 and the empty bucket 3 is separated from the charging hopper 7 and is lowered to the bucket carriage 2 with the crane 5 while being integrated with the bucket cover 4 and mounted on the bucket carriage 2. Next, the bucket 3 is separated from the bucket cover 4. When the bucket 3 and the bucket cover 4 are separated, the heated air in the bucket 3 becomes an ascending current from the gap between the bucket 3 and the bucket cover 4, and the bucket 3 Disperse into the atmosphere with the coke powder inside. The bucket carriage 2 carrying the bucket 3 is moved to a corresponding position in the coke oven in order to receive the red hot coke 1. Even when the bucket 3 is moved, since the bucket 3 does not have the bucket cover 4, the coke powder remaining inside the bucket 3 is easily scattered as dust.

<Configuration of bucket cover>
FIG. 3 is a configuration diagram showing the configuration of the bucket cover 4. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along the line AA in FIG. As illustrated, the bucket cover 4 has a disk shape so as to cover the upper portion of the cup-shaped bucket 3. However, the shape of the bucket cover 4 is not limited to a disk shape. For example, if the bucket 3 is a box shape, it may be a rectangular plate shape or the like, and may have a shape corresponding to the shape of the upper portion of the bucket 3.

  The bucket cover 4 includes a dust discharge port 40 for collecting the coke powder in the bucket 3 and an outside air inlet 41 for taking in outside air. The dust discharge port 40 has a rectangular cross section and is provided at the center of the disk-shaped bucket cover 4. Two pairs of outside air intake ports 41 are provided at the peripheral edge of the disk-shaped bucket cover 4, and each pair of outside air intake ports 41 is opposed to each other with the center portion of the bucket cover 4 sandwiched therebetween. It is provided in the position to do. The four outside air inlets 41 have a circular cross section. The cross-sectional shape and arrangement of the dust discharge port 40 and the outside air intake 41, the number of outside air intakes 41, and the like are appropriately determined depending on the capacity of the dust collector (such as a dust collection pump) and the size and shape of the bucket 3.

  An L-shaped discharge duct 42 is connected to the dust discharge port 40, and an opening / closing lid 42 a that can be opened and closed by a hinge is provided at the tip of the discharge duct 42. By connecting a dust collection duct 45 of a dust collection pump, which will be described later, to the tip of the discharge duct 42, the coke powder in the bucket 3 can be collected. In addition, an outside air introduction duct 43 is also connected to each of the outside air inlets 41, and an opening / closing lid 43 a that can be opened and closed by a hinge is provided at the tip of the outside air introduction duct 43. When taking in outside air, the open / close lid 43a is opened. The hinge structure is an example of an opening / closing mechanism for the opening / closing lid, and other opening / closing mechanisms may be used as long as the bucket 3 can be blocked from outside air by the opening / closing lid. However, the hinge structure can block the bucket 3 from the outside air with a simple structure, and even if a small explosion occurs in the bucket 3, the internal pressure in the bucket 3 can be released to the outside. preferable.

<Dust collection method for coke powder>
A method for collecting the coke powder in the bucket 3 will be described with reference to FIG. As shown in FIG. 4A, when the bucket cover 4 is separated from the empty bucket 3, the dust collection duct 45 is connected to the tip of the discharge duct 42 with the open / close lid 42a opened before the separation. The dust collection duct 45 is connected to a dust collection pump (not shown). Thereby, the coke powder in the bucket 3 and hot air can be collected from the dust discharge port 40.

  After starting dust collection from the dust discharge port 40, as shown in FIG. 4B, the open / close lid 43a of the outside air introduction duct 43 provided in the bucket cover 4 is opened. Thereby, outside air can be taken in from the outside air intake 41 into the bucket 3 which has become negative pressure by collecting dust from the dust discharge port 40. At this time, since the four outside air inlets 41 are provided at the peripheral edge of the bucket cover 4, the outside air taken in from the outside air inlet 41 takes in coke powder adhering to the side wall surface in the bucket 3. Flows downward. And the outside air which flowed downward collides with the bottom part in a bucket, and flows into the bottom center part. Further, the pair of outside air intake ports 41 are the peripheral portions of the bucket cover 4, and the respective outside air intake ports 41 are provided at positions facing each other across the central portion of the bucket cover 4. A pair of outside air that has flowed downward on the side wall surfaces of the opposed positions collides with each other at the center of the bottom of the bucket 3 and moves upward (in the direction of the bucket cover 4) along the central axis of the bucket 3. Thereby, the coke powder in the bucket 3 taken in by the outside air can be efficiently collected from the dust discharge port 40 provided in the central portion of the bucket cover 4.

  Thereafter, as shown in FIG. 4C, the bucket cover 4 is raised and separated from the bucket 3, but dust collection is continued from the dust discharge port 40 when the bucket cover 4 is separated from the bucket 3. Thereby, since outside air can be taken in through the gap between the bucket 3 and the bucket cover 4, the coke powder in the bucket 3 is reliably prevented from being scattered as dust from the gap between the bucket 3 and the bucket cover 4. Can do.

<Another embodiment>
The outside air introduction duct 43 may be provided with a fan in addition to the opening / closing lid 43a. By forcibly taking outside air into the bucket 3 by the rotation of the fan, the inside of the bucket 3 can be set to a positive pressure, and when collecting dust from the dust discharge port 40, it becomes easier to collect dust.

  Moreover, you may comprise so that the bucket cover 4 may be equipped with a water supply apparatus. Since the inside of the bucket 3 is at a high temperature, when sprayed or water droplets are supplied into the bucket 3 by the water supply device, water vapor is generated in the bucket 3. This makes it easy to collect dust when collecting dust from the dust discharge port 40 by making the inside of the bucket 3 have a positive pressure with the generated water vapor, and the water vapor captures fine dust to improve dust collection efficiency. Can be raised.

  Note that the timing of collecting the dust in the bucket 3 is not limited to the above case. For example, the dust can be collected when the red hot coke 1 in the bucket 3 is put into the chamber 6. Since the dust scattering prevention device according to the present invention can collect dust from the dust discharge port 40 provided in the bucket cover 4, any timing can be obtained as compared with a method for preventing dust scattering by covering the entire building. It is easy to collect dust, and the equipment is compact and the cost is low.

Schematic diagram of fire extinguishing process of red hot coke by CDQ equipment Schematic showing how the coke powder in the bucket scatters Schematic diagram of bucket cover Schematic diagram for explaining how to collect coke powder

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Red heat coke 2 Bucket cart 3 Bucket 4 Bucket cover 5 Crane 6 Chamber 7 Loading hopper 8 Coke cutting device 9 Coke 40 Dust outlet 41 Outside air intake 42 Outlet duct 43 Outside air introduction duct 45 Dust collecting duct

Claims (3)

A dust scattering prevention device for a bucket for a coke dry-type fire extinguishing equipment comprising a bucket cover that covers the upper part of the bucket for receiving red heat coke and transporting it to the chamber,
The bucket cover is provided with a dust discharge port for collecting the coke powder in the bucket and at least one pair of outside air intake ports for taking outside air into the bucket,
The dust discharge port is provided in a central portion of the bucket cover, and the pair of outside air intake ports are provided at peripheral positions of the bucket cover at positions facing each other across the central portion. Dust scattering prevention device for buckets for coke dry fire extinguishing equipment. Coke dry fire extinguishing equipment bucket dust prevention method,
From the dust outlet provided in the center of the bucket cover that covers the upper part of the bucket for receiving red heat coke and transporting it to the chamber, start collecting the coke powder in the bucket,
For the coke dry fire extinguishing equipment, the outside air is taken in from at least one pair of outside air inlets provided at positions facing each other across the central portion after starting dust collection. How to prevent dust scattering on the bucket. The dust scattering prevention method for a coke dry fire extinguishing equipment bucket according to claim 2 , wherein the bucket cover is separated from the bucket while dust collection is continued after the dust collection is started.

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