JPH11172255A - Dust collector for riser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collector which can collect and remove dust without fail from the riser of a coke oven during coke pushing. SOLUTION: There is provided a dust collector, wherein the charging car 2 of a coke oven 1 is provided with a dust collection hood which covers over the opening 4 of a riser 3 and a communication duct 6 communicating therewith, and the duct 6 is connected to the inlet of a preduster 7 on the car 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for collecting dust discharged from a riser when the top cover of the riser is opened, such as during coke extrusion of a coke oven.

[0002]

2. Description of the Related Art It is known that a truck is provided which is movable in the direction of a coke oven furnace, and on which a cyclone and a honeycomb filter which can be connected to a riser are mounted.
-1188653). Further, it is known that a movable trolley is equipped with a dust collecting hood and a communication duct, but the movable trolley is not provided with a dust removing device (Japanese Patent Laid-Open No. Hei 7-118653).
No.).

[0003] In order to collect dust generated from a coal charging port when charging a coke oven, a connecting pipe is extended from one end of a centralized dust collecting duct, and the extended end is placed in an opening of a rising pipe. Are known. However, this device does not include a dust removing device and does not use a coal truck (Japanese Patent Laid-Open No. 55-94990). 2. Description of the Related Art It is known that a gas rising in a riser at the time of cutting a carbonization chamber of a coke oven and an air collecting main pipe is suddenly changed in direction and cleaned and dusted before being discharged from a canopy. However, a truck is also used in this apparatus, but it is used only for collecting dust from a riser of a coke oven, and has nothing to do with a coal-charging truck (Japanese Patent Laid-Open No. 7-258647).

FIG. 3 shows one example of the prior art.
FIG. Reference numeral 36 denotes a connection duct. A conduit is connected to the cyclone 27 via a communication duct 36 from a charging hood positioned at the coal charging inlet of the coke oven.
A central duct 33 is connected to the cyclone. However, there is no dust hood to be positioned from the cyclone to the riser of the coke oven.

[0005] In summary, in the prior art, when a coal-powered vehicle is used, a pre-duster and a mist separator are not mounted on the coal-powered vehicle. Since these devices are not mounted on a coal-powered vehicle but are placed separately, compared to mounting on a coal-powered vehicle,
Extra cost is required to collect dust from the riser section. In addition, there is no suction power source when trying to suck the gas discharged from the riser pipe into the centralized duct, or even if there is, the suction power is insufficient. Therefore, in order to prevent pollution, it is necessary to additionally install a dust collecting device and a blower to collect dust generated from the riser, and a truck for mounting the dust collecting device and the blower is also required.

[0006] A configuration in which only the connecting duct is connected to the centralized duct from the opening of the riser pipe has been used. In this case, the dust is not removed, so that the dust is deposited on the centralized duct. Therefore, it is necessary to newly provide a washing nozzle and a direction changing portion to the riser. Further, since the gas discharged from the riser is close to 1000 ° C., if the gas is directly introduced into the centralized duct, the centralized duct is burned, so that it is necessary to cool the dust.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to devise an apparatus for collecting and removing dust generated not only from a charging port of a coke oven but also from a rising pipe.

[0008]

According to the present invention, the object of the present invention is attained by the matters specified in claims 1 and 2. 1) Exhaust gas cooling and dust collection are indispensable to prevent pollution, and it is increasingly necessary to provide dust collectors on coal-equipped vehicles.
In this means, a dust collector already mounted on the coal-equipped vehicle is used as a riser dust collector. 2) The existing dust collector removes coal dust generated from the vicinity of the charging inlet during coal charging and dust discharged from the coke oven. 3) On the other hand, when the carbonization of coal is completed or when coke is extruded, the damper for disconnecting the connection with the gas recovery equipment is opened, the top cover of the riser is opened, and the riser has the same function as a chimney. Let it do. Dust is also discharged from the opening of the riser along with the rising airflow. 4) In particular, the coke extrusion step is usually performed in a kiln five points ahead of the coal charging step. The kiln for extruding coke and the kiln for coking are never the same. Therefore, if the dust collection from the coal charging inlet and the dust collection from the riser section are performed by one coal-equipped truck, the operation time points are different. The collection of dust at the time of charging and the collection of dust from the riser are performed sequentially or selectively according to the movement of the coal truck. 5) Hold the dust collection hood over the opening of the riser, suck the dust discharged from the opening when extruding coke, etc., and put it into the dust collector through the communication duct. The exhaust gas from which dust has been removed is sent to a centralized duct. As a result, dust deposition in the centralized duct is reduced. 6) Since all the dust discharged from the riser tube opening is taken into the dust collecting hood, the atmosphere around the coke oven riser tube is not polluted. 7) Since the gas discharged from the riser is close to 1000 ° C., it cannot be directly introduced into the centralized duct. Contact with water by the preduster reduces the temperature together with dust collection. As the temperature decreases, the gas volume also decreases. The reduced gas volume reduces the gas pressure loss for delivery to the centralized duct and allows the blower to more efficiently deliver exhaust gases from the centralized duct.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is constituted by the following embodiments. Hold the dust collecting hood over the riser section of the coke oven, connect the dust collecting hood to the pre-duster via the communication duct, and follow the pre-duster with the mist separator to complete the dust removal. Depending on the type of equipment, a coal blower was equipped with a built-in blower to drive exhaust gas into the centralized duct.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS The details and advantages of the invention will now be described by way of example with reference to the drawings. The present invention will be described in detail with reference to the embodiment shown in FIGS. According to FIG. 1, the opening 4 of the riser 3 of the coke oven 1 can be opened and closed via a top cover 14.

A coal-carrying vehicle 2 capable of traveling on a traveling track and stopping at a predetermined position in front of the coke oven is positioned at the opening 4 of the riser pipe 3 of the coke oven 1 when the coal-assisted truck 2 is stopped. The communication duct 6 is connected to the dust collection hood 5, and the communication duct 6 is bent and connected to the preduster 7 after being raised. Another one of the communication ducts 16 is connected to the preduster 7, and the individual communication ports 16 of the coke oven 1 are connected to the communication duct 16.
The charging hood 11 for charging coal to the branch 0 is branched. The coal hood 11 can also be positioned to align with the charging inlet 10 of the coke oven 1 when the coal trolley 2 is stopped.

FIG. 2 is a plan view of the above-described dust collection system. A communication duct 6 is connected to the dust collecting hood 5 of the coal-carrying truck 2 which can be connected to the riser pipe 3, and a pre-duster 7 is connected to the communication duct 6, while being positioned at four charging ports 10 of the coke oven 1. , One connecting duct 16 connected to the corresponding four charging hoods 11 is
Connected to As shown by a two-dot chain line, the communication duct 16 may be connected to the gas flow from each inlet hood 11 to the preduster 7 by a separate conduit.

As described above, the two communication ducts 6 and 16
Are connected to the preduster 7 in a merged manner, the mist separator 8 is connected to the preduster 7, and the mist separator 8 is connected to the centralized duct 13 via the blower 9 and subsequently via the connector 12 (FIG. 1). ), The purified gas is discharged from the centralized duct 13 into the atmosphere. The dust collector is
It is composed of a preduster 7 and a mist separator 8. If a blower 9 is required, the mist separator 8
And the connector 12 is incorporated into the conduit. The following blowers are used in this case.

[0014] For dust collection at the time of coal charging, dust generated near the coal loading port 10 is sucked from the charging inlet hood 11 and collected by the preduster 7 and the mist separator 8. The exhaust gas after dust collection is sucked and pushed out by a blower 9, passed through a connector 12 and sent to a centralized duct 13. If there is a suction pressure inside the centralized duct 13, the blower 9 is omitted.

The top cover 14 is opened at the top of the riser 3, and dust is discharged from the opening 4. This is sucked from the dust collecting hood 5 and communicates with the entrance of the pre-duster 7 through the communication duct 6. A damper 15 for adjusting the amount of exhaust gas is provided in the communication duct 6. The damper 15 is opened when collecting dust from the riser.

Although the dust collecting hood 5 is held over the opening 4 of the riser 3, the dust collecting hood 5 can be moved up and down, and
If the openings 4 are covered, the dust collection can be further ensured.

[0017]

According to the present invention, it is possible to remove dust by providing a simple device including only a dust collecting hood and a communication duct from exhaust gas of a rising pipe containing dust. Pollution is prevented because no dust is emitted to the outside world. There is no need to install new dust collectors and carts.

Since the dust collector mounted on the coal truck is diverted, no new space needs to be provided on the coal truck in terms of arrangement. Since the new facilities are duct-shaped, they can be routed freely, require little additional space, and will not interfere with existing coal-charging and coke oven operations. No modification of the riser is required.

Since the accumulation of dust in the centralized duct is reduced, the cleaning time is shortened, which contributes to labor saving.

[0020]

[Brief description of the drawings]

[0021]

FIG. 1 is a system diagram of a riser dust collector according to the present invention.

[0022]

FIG. 2 is a plan view of a coal-equipped truck provided with a riser dust collector according to the present invention.

[0023]

FIG. 3 is a plan view of a coal-powered vehicle according to the related art.

[0024]

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Coke oven 2 Charcoal truck 3 Rising pipe 4 Opening 5 Dust collection hood 6 Communication duct 7 Pre-duster 8 Mist separator 9 Blower 10 Installation entrance 11 Installation entrance hood 12 Connector 13 Centralized duct 14 Top cover 15 Damper 16 Communication duct

Claims (2)

[Claims] 1. A dust collecting hood (5) that is held over an opening (4) of a riser (3) on a coal-charging truck (2) of a coke oven (1);
An ascending pipe dust collector, comprising: a connecting duct (6) connected to the connecting duct; and the connecting duct (6) connected to an inlet of a preduster (7) on a coal-equipped car (2). 2. A charging truck (2) of a coke oven (1) is provided with a charging inlet hood (11) facing a charging inlet (10) of the coke oven (1) and a communication duct (16) connected thereto. 2. A riser dust collector according to claim 1, wherein the connecting duct is connected to an inlet of a pre-duster on the coal-equipped car.