JPS5921354B2 - Coke dry fire extinguishing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coke dry extinguishing system for extinguishing red-hot coke discharged from a coke oven using circulating cooling gas.

In recent years, dry type fire extinguishing systems have been adopted in place of conventional wet type fire extinguishing systems as excellent coke fire extinguishing systems that do not cause environmental pollution and can effectively utilize waste heat.

Next, an example of the above-mentioned dry fire extinguishing system will be explained with reference to the system diagram shown in FIG.

The red hot coke that has been dry distilled in the coke oven 1 is taken out from the coke oven 1 and passed through the guide wheel 2 to the coke oven 1.
The packets 5 are loaded onto a transport vehicle 4 that travels on rails 3 laid along the rails 3.

Next, the transport vehicle 4 loaded with the red hot coke moves on the rails 3, changes its direction horizontally by 90 degrees with the turntable 6, and moves toward the hoist tower 7.

Packet 5 on carrier vehicle 4 located in hoist tower 7
is a hoist 8 running high above the hoist tower 7.
It is lifted up by the fire-extinguishing furnace body 9, and is moved directly above the fire-extinguishing furnace body 9, and is positioned above the charging port 10 provided at the top of the fire-extinguishing furnace body 9.

Then, by opening the bottom of packet 5,
The red-hot coke inside is charged into the fire extinguishing furnace main body 9.

The fire extinguishing furnace main body 9 has an upper half inside a prechamber 9A,
Further, the lower half part is formed as a quenching chamber 9B, and a cutting device 11 is provided at the lower part, and the red hot coke charged into the fire extinguishing furnace main body 9 is transferred to the quenching chamber 9B.
The fire is extinguished by the cooling circulating gas blown in from the bottom of the coke conveyor 1 and is sequentially discharged from the cutting device 11.
It is designed to be taken out to 2.

As described above, to extinguish the red-hot coke in the quenching chamber 9B, a cooling circulating gas (for example, a gas consisting of N2, N2, and CO) that is pumped by the fan 13 is used, and this cooling circulating gas is First, the gas enters the annular gas chamber 17 formed between the taste distributor 14 provided at the bottom of the quenching chamber 9B and the bottom opening 16 leading to the cutting gate 15 of the cutting device 11, and enters the quenching chamber 9B. 9B and comes into contact with the red hot coke in the quench puffer chamber 9B to extinguish it.

As described above, the cooling circulating gas that has extinguished the red-hot coke in the quench puffer chamber 9B is transferred to the pre-chamber 9A.
Through a large number of slits 18 provided in the furnace inner wall at the boundary between the
After entering the annular gap 19 formed inside the circumferential wall, it is discharged into a duct 20 that protrudes laterally from the negative part of the furnace wall.

Dust removal equipment 21 provided in the system of the duct 20
After separating and removing dust etc., it reaches the waste heat boiler 22, where it exchanges heat with the water flowing in the heat exchanger group 23,
It returns to the blower 13 through the cyclones 24 and 24, is blown into the fire extinguishing furnace body 9 again, and is used for circulation.

In addition, is the cooling circulating gas inside the duct 20? Approximately 800°C near the bottom outlet of the waste heat boiler, and approximately 180°C near the bottom outlet of the waste heat boiler.
In addition, the water flowing through the heat exchanger 23 becomes steam and is used for the turbine of the power generation equipment and others.

In the coke dry fire extinguishing system having such a structure, the cooling circulating gas flowing from the bottom to the top inside the fire extinguishing furnace body 9 enters the annular cavity 19 through a large number of slits 18, and then protrudes laterally from a part of the furnace wall. Therefore, a large amount flows out from the slit 18 located close to the duct 20, and a small amount flows out from the slit 18 located far from the duct 20, resulting in an imbalance in the fire extinguishing ability. There was a problem that occurred.

From the above-mentioned viewpoints, the present invention provides a coke dry extinguishing system that allows cooling circulating gas to flow uniformly from all the slits in the circumferential direction of the inner wall of the fire extinguishing furnace body, thereby evenly extinguishing the red-hot coke inside the fire extinguishing furnace body. A large number of slits are provided along the entire circumference of the furnace inner wall near the boundary between the pre-chamber and the quenching chamber of the fire extinguishing furnace body, and are divided into several groups, each of which has an independent cavity inside the surrounding wall. The feature is that it is connected to the duct through the duct.

Next, the apparatus of the present invention will be explained by way of embodiments with reference to the drawings.

FIG. 2 shows the structure of the slit in the fire-extinguishing furnace body and the gap inside the peripheral wall, which are essential parts of the apparatus of the present invention, as a schematic vertical sectional view of the fire-extinguishing furnace body.

As shown in the drawing, the fire extinguishing furnace main body 25 includes a prechamber 25A in the upper half and a quenching chamber 25A in the lower half.
A large number of slits 18 are formed over the entire circumference of the furnace inner wall 25a near the boundary with the furnace wall 25a.

The slit 18 extends from a portion close to the connection port 26 to the duct 20 (see FIG. 1) to a portion on the farthest opposite side.
As shown in the sectional view taken along the line X-X in FIG. 2 and as shown in the exploded view in FIG. ,28,29
, 29, 30° 30 are connected to the duct 20, and each gap 27, 28, 29, 30 is connected to the connection port 26.
It has been merged at.

Furthermore, the opening cross-sectional area of the gaps 27.28, 29.30 at the connection port 26 is as follows, starting from the one closest to the connection port 26:
They are arranged three-dimensionally so that they gradually become dogs in order of distance.

The lower part of the fire extinguishing furnace body 25 has an annular gas chamber 31 into which the cooling circulating gas flows, and the cooling circulating gas pumped into the gas chamber 31 flows through the gap 32 to the quenching chamber 25B. This is the same as in the conventional device.

Since this inventive device is constructed as described above, the cooling circulating gas that has entered the quenching chamber 25B of the fire extinguishing furnace main body 25 rises along the inner wall of the furnace and passes through the numerous slits 1.
Enter 8.

The slits 18 in the group closest to the connection port 26 are
It is connected to the duct 20 through the air gap 27.27 with a small cross-sectional area, and the groups further away in sequence are air gaps 28, which have a small cross-sectional area.
Since it is connected to the duct 20 through the slits 28, 29, 29, 30, and 30, the cooling circulating gas is sucked in almost uniformly from each slit 18, and the red-hot coke in the fire extinguishing furnace body 25 is uniformly cooled and extinguished.

As explained above, according to the device of this invention, the gas flow velocity within the fire extinguishing furnace body becomes uniform, the cooling efficiency of red-hot coke is improved, and it is particularly suitable for large-sized devices, and has excellent performance as a dry type fire extinguishing device. It brings about excellent industrial effects.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing a conventional coke dry extinguishing system, Fig. 2 is a longitudinal sectional view of the main body of the fire extinguishing furnace, showing the arrangement of slits and gaps in the main body, which are the main parts of the inventive device, and Fig. 2
FIG. 4 is a cross-sectional view taken along the line X--X in FIG. 4, and a developed view showing the arrangement of slits and gaps. In the drawings, 18...slits, 20...
... Duct, 25 ... Fire furnace main body, 25A.
...Pre-chamber, 25B...Quenching chamber, 25a...Furnace inner wall, 26...
...Connection port, 27, 28, 29, 30... air gap.

Claims (1)

[Scope of Claims] 1. A large number of slits are provided along the entire circumference of the furnace inner wall near the boundary between the bure chamber and the quenching chamber of the fire extinguishing furnace body, and the slits are inserted through gaps formed inside the furnace wall. A coke dry extinguishing system having a structure in which the large number of slits are divided into several groups, and each group is connected to the duct through an independent gap inside the peripheral wall. Device.