JP3551486B2 - On-board dust collector for coke oven charcoal truck - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an on-board collecting device for a coke oven charcoal truck in which when coal is charged into a coking chamber of a coke oven, gas ejected from the charging inlet into the atmosphere is collected and treated by a dust collecting hood provided in the charcoal truck. It relates to a dust device.
[0002]
[Prior art]
In general, when charging coal into a coking chamber arranged in a coke oven, as shown in FIG. 2, the coal is mounted on a coking car 20 corresponding to a plurality of charging ports 22 provided at the top in the longitudinal direction of the coking chamber 1. The coal stored in the coal loading hopper 5 is cut out using the feeder 21, and the charging chute 2 that expands and contracts in a telescopic manner contacts the charging inlet 22 and is charged into the carbonization chamber 1.
[0003]
Since the interior of the coking chamber 1 is heated to a high temperature, the coal charged in the coking chamber 1 is rapidly heated to generate flammable gas, and the gas and dust are discharged from the charging port 22 into the atmosphere. . In order to collect the gas and dust spouted when coal is charged into the charging port 22, the dust collecting hood 3, which can move up and down on the coal loading vehicle 20, is lowered around the charging chute 2 in contact with the charging port 22. To collect the erupting gas.
[0004]
Since the gas thus collected contains combustibles, combustion air is supplied from the air fan 7 to the ignition burner 4 disposed at the dust collecting hood 3 and LPG gas is supplied from the LPG cylinder 8. Is supplied and ignited, and combustible components in the gas are burned to make it inactive, thereby preventing explosion of the combustible gas on the downstream side.
The gas burned in each dust collecting hood 3 is first guided to the wet dust remover 12 via the dust collecting duct 6. The water spray nozzle 11 is installed in the wet dust remover 12, and the gas guided into the wet dust remover 12 sprays water supplied from the water spray tank 9 through the water spray pump 10 from the water spray nozzle 11. Removes dust in the gas.
[0005]
The gas removed by the wet dust remover 12 is then guided to a centrifugal separator 13, where water droplets and the like in the gas are centrifuged, and then disposed on a coal-equipped vehicle 20 via a gas pressure fan 14. It is guided to a fixedly installed dust collecting duct 16 via a connecting / disconnectable connecting pipe 15. From the collecting dust collecting duct 16, the dust is guided to a large dust collecting device (not shown) installed on the ground, where finer dust is collected (for example, see Japanese Patent Application Laid-Open No. 4-346810).
[0006]
[Problems to be solved by the invention]
In the prior art shown in FIG. 2, there is a risk of explosion due to combustible components (H ₂ , CO, CH ₄ ) and dust in the on-board dust collector 25 mounted on the coal-equipped vehicle 20. This is because even if the combustible gas collected by the dust collecting hood 3 is ignited by the ignition burner 4 using the ignition burner 4, not all combustible components can be burned. Will increase. Should a large-scale explosion occur, not only would the equipment be destroyed, resulting in greater damage, but also there would be an increase in restoration work, and during that time dust could not be collected, thus posing a problem of pollution.
[0007]
(1) If the air fan 7 that supplies combustion air to the ignition burner 4 fails during charging, and the collected gas is not ignited by the ignition burner 4, a large amount of combustible gas flows downstream and explodes. I do.
(2) water spray pump 10 supplies water to wet dust collector 12 fails during Sosumi, if not sprinkled from the water spray nozzle 11, the temperature of the gas rises, the wet dust collector can not extinguishing the sparks 12 And explode in the centrifuge 13 and the like.
[0008]
(3) If the gas pressure boosting fan 14 stops due to a failure during coal charging, the combustible gas stays inside the wet dust remover 12 and the like and explodes.
An object of the present invention is to provide an on-board dust collecting apparatus for a coke oven coal-equipped vehicle 20 that can prevent the risk of explosion due to an abnormality of the on-board dust collecting apparatus 25 mounted on the coal-equipped vehicle 20 as described above. It is assumed that.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an ignition burner provided in a dust collection hood that can be raised and lowered so as to collect gas ejected from a charging inlet during charging of a coke oven, and is connected to the dust collection hood. In a vehicle-mounted dust collecting apparatus of a coke oven-equipped vehicle equipped with a wet dust remover and a gas booster fan in the dust collecting duct, a shut-off valve is provided in the dust collecting duct on the entrance side of the wet dust remover, and the shut-off valve is provided. A diffusion valve is provided in a diffusion duct branched from a dust collection duct on the upstream side of the apparatus, while a dilution valve is provided in a dilution duct for introducing air into the wet dust remover, and the shut-off valve is used when the dust collection gas is abnormal. Is operated in a closed state, and a diffusion valve and a dilution valve are operated in an open state to prevent explosion of dust collection gas.
[0010]
[Action]
In the present invention, when the on-board dust collecting device mounted on the coal-equipped vehicle is normal, the dust collection is performed by the same gas flow as the above-described conventional device as the shutoff valve-fully open, the diffusion valve-fully closed, and the dilution valve-fully closed. Can be achieved.
On the other hand, if the on-board dust collector stops abnormally, it receives the abnormal stop signal, which activates the release valve from closed to open, releases explosive gas from the release duct to the atmosphere, and closes the shutoff valve from open to closed. It operates to shut off the explosive gas to the warm type dust collector, and opens the dilution valve from closed to remove the explosive gas that has been accumulated after the wet type dust collector by the air introduced from the dilution duct. The dilution prevents explosion after the wet dust remover.
[0011]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIG. In FIG. 1, the same components as those of the conventional device shown in FIG.
As shown in FIG. 1, in the present invention, a shutoff valve 17 is provided in a dust collection duct 6 on an entrance side of a wet dust remover 12 mounted on a coal-equipped vehicle 20, and a dust collection duct on an upstream side of the shutoff valve 17 is provided. Dissipation valve 18 is provided in dissipation duct 23 branched from 6. In addition, a dilution valve 19 is provided in a dilution duct 24 for introducing the atmosphere into the wet dust remover 12.
[0012]
When the on-board dust collecting device 25 mounted on the coal-equipped vehicle 20 is normal, while charging coal into the coking chamber 1 from the coal-equipped hopper 5 via the charging inlet 22, the shut-off valve 17 is opened and the diffusion valve is opened. 18 and the dilution valve 19 are closed. Therefore, the combustible gas ejected from the charging port 22 is collected by the dust collecting hood 3 and then ignited by the ignition burner 4 and burned. It is led to the collecting dust collecting duct 16 on the ground side via the fan 14 and the connecting pipe 15.
[0013]
In the present invention, for example, in the following cases, it is determined that the on-board dust collecting device 25 is abnormal, and based on this, the shutoff valve 17, the diffusion valve 18, and the dilution valve 19 are operated to the safe side.
(1) Abnormal stop of air fan 7 Since combustion air is not supplied from the air fan 7 to the ignition burner 4, the ignition is not performed, and only the LPG is injected and the collected gas does not burn. There is a high probability that it will flow to the side and explode at the wet dust remover 12 etc.
[0014]
(2) Abnormal stop of the water spray pump 10 Water is not supplied from the water spray pump 10 and water is not sprayed from the water spray nozzle 11, the gas temperature in the wet dust remover 12 rises, and fire is not extinguished. High probability of doing.
(3) Abnormal stop of the gas pressure increasing fan 14 Since the gas is not discharged by the gas pressure increasing fan 14, the possibility of explosion is high because the flammable gas stays in the wet dust remover 12.
[0015]
In the present invention, a criterion other than the above may be newly added as necessary.
If the air fan 7, the watering pump 10 or the gas booster fan 14 stops abnormally as described above, the stop signal immediately activates the release valve 18 from the closed state to the open state to release the explosive flammable gas into the discharge duct 23. From the atmosphere. Then, the shutoff valve 17 is operated from the open state to the closed state to block the inflammable gas from flowing into the wet type dust remover 12. At the same time, the dilution valve 19 is operated from the closed state to the open state to introduce air from the dilution duct 24, thereby diluting the combustible gas that has accumulated in the wet dust remover 12 and thereafter, thereby preventing the explosion.
[0016]
【The invention's effect】
As described above, according to the present invention, when an abnormality occurs in the onboard dust collector mounted on the coal-equipped vehicle, the release valve is opened to release flammable gas into the atmosphere, and the shutoff valve is closed. To prevent flammable gas from flowing into the wet dust remover. At the same time, the dilution valve is opened and air is introduced into the wet type dust remover to dilute the remaining combustible gas, so that the combustible dust gas in the on-board dust collector is prevented from exploding. The effect is enormous.
[Brief description of the drawings]
FIG. 1 is a schematic layout view showing an on-vehicle dust collecting device mounted on a loaded vehicle according to the present invention.
FIG. 2 is a schematic layout view showing an on-vehicle dust collecting device mounted on a loaded vehicle according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Carbonization chamber 2 Charging chute 3 Dust collecting hood 4 Ignition burner 5 Charging hopper 6 Dust collecting duct 7 Air fan 8 LPG cylinder 9 Sprinkling tank 10 Sprinkling pump 11 Sprinkling nozzle 12 Wet dust remover 13 Centrifugal separator 14 Gas booster fan 15 Connecting pipe 16 Collecting dust collecting duct 17 Shut-off valve 18 Dispersing valve 19 Dilution valve 20 Coal truck 21 Feeder 22 Loading inlet 23 Dispersion duct 24 Dilution duct 25 On-board dust collector

Claims (1)

An ignition burner is provided in a dust collection hood that can be raised and lowered to collect gas ejected from a charging inlet during coal charging to a coke oven, and a wet dust remover and a gas booster are provided in a dust collection duct communicating with the dust collection hood. In an on-board dust collecting apparatus of a coke oven equipped with a fan, a shutoff valve is provided in a dust collecting duct on an entrance side of the wet type dust remover, and a branch is made from a dust collecting duct on an upstream side of the shutoff valve. While dissipating valves are disposed on the dissipating ducts, diluting valves are disposed on the dilution ducts for introducing the atmosphere into the wet dust remover, and when the dust collection gas is abnormal, the shut-off valve is operated. An on-board dust collecting apparatus for a coke oven-equipped vehicle, wherein the dust collecting gas is configured to be opened to prevent explosion of dust collected gas.

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