JPH04178494A - Method for preventing leakage of dust from coke-quenching tower - Google Patents

Abstract

PURPOSE:To effectively prevent dust from scattering about from the opening of the gate of a coke-quenching tower by spraying down water from a water curtain device to cover the opening of the gate with the formed water curtain, before the coke is quenched with sprayed water. CONSTITUTION:After a coke-quenching vehicle 2 carrying red-heated coke is entered in a coke-quenching tower 1, but before the fire-extinguishment of the coke is started by the spray of water from a spraying device 10 disposed in the quenching tower 1, water is sprayed down from a water curtain device 4 disposed above the gate 3 of the coke-quenching tower 1 for the coke- quenching vehicle 2 to cover the opening of the gate with a water curtain 13, thereby permitting to prevent the dust of the coke from leaking from the coke- quenching tower.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for preventing dust leakage in a coke extinguishing tower using a wet extinguishing method used during coke production.

(Prior art) Red-hot coke pushed out of a coke oven is loaded onto a fire extinguishing truck via a guide car, and after the fire extinguishing truck is put into a fire extinguishing tower, the coke is extinguished by injecting water from an upper fire extinguishing spray device. Coke fire extinguishing towers using a wet extinguishing method for cooling are known.

Since red-hot coke has a high temperature (approximately 1000 degrees Celsius), a large amount of water vapor is generated when water is injected, and dust is stirred up by the rising wind caused by this water vapor.

Most of the dust rises inside the fire tower and is removed by an upper filter and an upper spray device installed above it. However, water vapor and dust that could not rise due to the resistance of the filters leaked from the entrances and exits of the fire tower through which fire engines entered and exited, and were scattered around.

Dust leakage from this entrance has not been considered much of a problem in the past. However, in recent years, there has been a strong demand for improving the working environment and reducing dust scattering to surrounding areas, so it has become necessary to effectively reduce or prevent dust leakage from entrances and exits.

As a method for this purpose, after the fire engine enters the fire tower,
It is possible that the entrance/exit opening may be sealed with a mechanical structure. However, this idea is not realistic. This is because the entrance/exit opening is wide, about 8m x 10m, so the mechanical structure to block it has to be very strong, and it is also quite difficult to open and close it. That's why. Furthermore, since the entrance/exit openings pass through the related equipment (rails, cap tires, cables, etc.) for the operation of guide vehicles and fire extinguishing vehicles, it is difficult to sufficiently close them with mechanical structures. Since the structure has a complicated shape, this also makes opening and closing operations difficult.

(Problem to be Solved by the Invention) Therefore, an object of the present invention is to selectively and effectively prevent dust from scattering from the opening of the fire tower entrance/exit to the surrounding area when water is poured into the coke in the fire tower. The aim is to provide a practical method that can be used to close

(Means for Solving the Problems) According to the present invention, there is provided a method for preventing dust leakage in a coke fire extinguishing tower using a wet extinguishing method, in which a fire extinguishing truck loaded with red-hot coke enters the fire extinguishing tower. Before extinguishing the coke by injecting water from a fire extinguishing spray device installed at Provided is a method for preventing dust leakage from a coke extinguishing tower, the method comprising covering the opening of the tower with a water film.

(Example) FIG. 1 is a front sectional view of a fire extinguishing tower equipped with equipment for carrying out the method of the present invention, and FIG. 2 is a side sectional view thereof,
The coke oven and guide wheel on the near side are also shown.

An entrance 3 is formed on the side of the fire extinguishing tower 1 through which a fire extinguisher 2 can enter and exit, and in order to carry out the method of the present invention,
A water curtain device 4 is provided above the entrance/exit 3 of the fire tower 1. The water curtain device 4 has the shape of a nozzle header 5 having a plurality of nozzles, and in the illustrated embodiment, two stages of nozzle headers 5 are provided for one inlet/outlet 3. Each nozzle header 5 is
It is connected to a pump 7 via a separate switching valve 6. By individually operating each switching valve 6, the number of nozzle headers 5 that operate can be set to one or two stages.

The red-hot coke pushed out of the coke oven 8 is loaded into the fire extinguishing truck 2 via a guide car 9, moves on rails, and enters the fire extinguishing tower 1. After the fire engine 2 stops at a predetermined position within the fire tower 1, the switching valve 6 is opened and water is jetted out from the nozzle header 5 of the water curtain device 4, covering the opening of the entrance/exit 3 with a film of water. Thereafter, water is poured into the red-hot coke on the fire extinguishing engine 2 from a fire extinguishing spray device 10 provided in the fire extinguishing tower 1.

Most of the water vapor generated in large quantities by the injection of water from the fire extinguishing spray equipment 1O flows into the fire tower 1, stirring up dust.
rise within. Dust is removed from the upward flow by water injection from a filter 11 provided at the top of the fire tower 1 and an upper spray device 12.

It is desirable that water injection from the upper spray device 12 starts simultaneously with the activation of the water curtain device 4. However, if the filter 11 alone can remove dust sufficiently, the upper spray device 12 can be used for cleaning the filter 11 by not operating it when the fire is extinguished, but by operating it after the fire is extinguished.

During extinguishing the fire, dust attempting to scatter to the outside from the opening of the entrance/exit 3 is blocked by the water film 13 formed by the operation of the water curtain device 4.

Even if rails, cap tires, cables, etc. are laid at the entrance/exit 3, the water film 13 can effectively close the opening of the entrance/exit 3, unlike a mechanical structure.

Once the fire has been extinguished (for about 1 minute), the operation of the water curtain device 4 is then stopped, and the operation of the upper spray device 12 is also stopped. The fire extinguishing truck 2 carrying the extinguished and cooled coke leaves the fire extinguishing tower 1 and heads to the next process.

A dust meter 14 may be provided outside the entrance/exit 3 of the fire tower 1. Know the dust leakage status from the measurement value of the dust meter 14,
Depending on the amount, the number of operating stages of the water curtain device 4 can be changed. In this way, operating costs such as electric power costs can be saved while maintaining the dust removal effect.

The operating sequence of each device is shown in Figure 3. This sequence can be automatically controlled by using an appropriate control device that detects the movement of the fire extinguisher 2 using a sensor or the like.

(Effects of the Invention) According to the method for preventing dust leakage of the present invention, when water is poured into coke in a fire tower, the opening of the fire tower entrance can be selectively and effectively used to prevent dust from scattering from the opening to the surrounding area. can be closed. The necessary equipment is small and simple, and it is easy to operate, making it very practical. In addition, by using a water film, complex-shaped entrances and exits can be closed more reliably than doors of mechanical structures.

As described above, the method of the present invention can improve the working environment and prevent dust from scattering into the surrounding area.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a fire extinguishing tower equipped with equipment for carrying out the method of the invention. FIG. 2 is a side sectional view as well, and also shows the coke oven and guide wheel on the near side. FIG. 3 is a graph showing the operation sequence of each device. 1: Fire tower 2: Fire engine 3: Entrance/exit 4: Water curtain device 5/nozzle header 6: Switching valve 7: Pump 8: Coke oven 9: Guide car 10
: Fire extinguishing spray 11: Filter 12: Upper spray device 13/Water film 14: Soot and dust needle (4 people included) Fig. 2

Claims (1)

[Claims] A method for preventing dust leakage in coke fire extinguishing towers using the wet extinguishing method, which involves extinguishing the coke by injecting water from a fire extinguishing spray device installed inside the fire extinguishing tower after a fire engine carrying red-hot coke enters the fire extinguishing tower. Before starting, water is spouted downward from a water curtain device installed at the top of the entrance/exit of the fire tower through which the fire extinguishing engine enters and exits, and the opening of the entrance/exit is covered with a film of water. How to prevent dust leakage from fire towers.