JPS6241275B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously producing coke by dry extinguishing in a coke production facility.

In modern coke manufacturing processes, one method of extinguishing red-hot coke is the dry extinguishing method. In this method, red-hot coke taken out from a coke oven is charged into a sealable fire extinguishing equipment.
Here, the fire is extinguished and cooled while isolated from the atmosphere. Additionally, a cooling gas consisting mainly of inert gas is blown into the fire extinguishing equipment from below and discharged from above.
At this time, the heat obtained by the cooling gas from the coke is recovered by other equipment, such as a boiler, and used effectively. Note that the cooling gas is used in circulation.

By the way, in the conventional method of discharging coke in fire extinguishing equipment, the heat exchange efficiency between the coke and the cooling gas is still low, so the coke remains in a non-uniform high temperature state before reaching a certain cooling temperature in the fire extinguishing equipment. After that, it is necessary to perform wet cooling using water cooling, or to maintain the temperature uniformly within the equipment until a certain cooling temperature is reached, and then to discharge it intermittently. Therefore, there was a problem that the cooling capacity was not sufficiently high. To explain this in more detail according to Figures 1 and 2, the fire extinguishing equipment is
As shown in the figure, it has a cylindrical main body 1 consisting of a pre-chamber 2 and a cooling chamber 2a, which are installed with the cylinder axis vertical. Red-hot coke (for example, 1000°C) C is charged into this fire extinguishing equipment from a charging port 3 at the top, and from an inlet pipe 8 that opens directly below the blasting head 4 located below and from a peripheral wall 2b near the bottom of the main body 1. Cooling gas (for example, 160° C.) G is blown into the inlet pipe 8a that opens into the tube. The charged coke C descends while being cooled by the cooling gas G, and is taken out from the discharge pipe 6 provided at the bottom at, for example, 200°C. In addition, the blown cooling gas G spreads in all directions just below the blasting head 4, rises while cooling the coke C, passes through the exhaust hole 9a and passage 9b provided at the top, and is discharged from the cooling gas exhaust pipe 9 to the boiler, etc. be guided. The temperature of the discharged cooling gas G is, for example, 800℃
It is.

Figure 2 shows the radial distribution of coke temperature and rate of descent in the fire extinguishing equipment, and was measured for a fire extinguishing equipment with a main body diameter of 6.5 m. In the figure, the curve Tt shows the temperature near the top, the curve Tb shows the temperature near the bottom, and the curve Tm shows the temperature near the middle of the two. As is clear from the figure, the coke temperature drops to about 200° C. near the peripheral wall 2b, almost regardless of the height position. This is because when red-hot coke C is dropped and charged into the fire extinguishing equipment, coke C with a large lump diameter gathers near the peripheral wall 2b, and the gaps between the lumps become large, allowing for good circulation of the cooling gas G. This is because it is cooled to By the way, in order to increase the cooling capacity of fire extinguishing equipment, it is sufficient to sequentially discharge coke that has been cooled to a predetermined temperature, but this is not particularly the case with conventional discharge methods in fire extinguishing equipment. Not yet. Curve V in FIG. 2 shows the descending speed of the coke, and as is clear from this curve V, the descending speed near the peripheral wall 2b is approximately equal to the descending speed in the center where the coke temperature is high. That is, the coke C near the peripheral wall 2b stays in the fire extinguishing equipment for a longer time than necessary, and is discharged in a non-uniform high temperature state before reaching a certain cooling temperature in the fire extinguishing equipment, and then,
It is necessary to perform wet cooling using water cooling, or maintain the cooling temperature uniformly within the fire extinguishing equipment until it reaches a certain level, and then discharge it intermittently, and it is clear that this reduces the cooling capacity. It is.

Therefore, this invention solves the above-mentioned problems in the conventional coke discharge method in coke extinguishing equipment, and provides a continuous production method for dry-cooled coke that provides a large cooling capacity and high heat exchange efficiency. This is what I am trying to do.

The gist of the present invention is to provide a cylindrical body installed with the cylinder axis vertical, a red-hot coke charging port provided at the top of the body, a cooled coke discharge port provided at the bottom of the body, and a cylindrical body disposed at the bottom of the body. In a fire extinguishing system equipped with a cooling gas inlet pipe installed at the top of the main body and a cooling gas discharge pipe installed near the top of the main body, a coke dry type fire extinguishing system is used in which the discharge part extends obliquely downward and outward from the bottom of the main body. The coke is cooled in a dry manner, and the cooled coke is continuously discharged.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings.

Figures 3 and 4 show an example of dry fire extinguishing equipment used in the present invention. As shown in these drawings, the fire extinguishing equipment includes a pre-chamber 12 and a cooling chamber 12a similar to those of the conventional ones.
A main body 11, a red-hot coke charging port 13, a cooling gas introduction pipe 18, a cooling gas discharge pipe 19, and the like are provided.

The outlet for taking out the cooled coke C consists of three discharge pipes 16 extending radially downward and outward from the bottom of the main body 11 at intervals of 120 degrees.
The bottom plate 15 of the main body 11 is inclined left and right toward the opening 17 of the discharge pipe 16 with a ridge line R located between adjacent discharge pipes 16 as a boundary. Furthermore, at the outlet of the discharge pipe 16, there is an opening/closing device 20 for adjusting the removal of the cooled coke C and a rotating discharge drum 27.
Also, a conveyor 21 for conveying coke C is arranged directly below the outlet.

Next, a method for producing dry-cooled coke using the fire extinguishing equipment configured as described above will be described.

Red-hot coke C is charged from the charging port 13 at the top, and cooling gas G is blown from the introduction pipe 18 at the bottom. The blown cooling gas G rises while cooling the coke C which gradually descends due to gravity, and is led to external equipment from the cooling gas discharge pipe 19. Coke C descending near the peripheral wall 12b flows directly into the discharge pipe 16 or is guided by the bottom plate 15 and flows into the discharge pipe 16. Further, the coke C descending near the center is guided by the slope of the blasting head 14 provided near the bottom and flows into the discharge pipe 16.

Figure 5 shows the radial distribution of coke temperature and rate of descent in the fire extinguishing equipment, where curve Tt is the temperature near the top, curve Tb is the temperature near the bottom, and curve Tm is the temperature near the middle of the two. Each shows the temperature. These temperature distributions have a smaller temperature difference between the center and the peripheral wall than the conventional ones, and the coke is cooled uniformly.

On the other hand, curve V shows the descending speed of the coke, and the difference from the conventional speed distribution is that the descending speed gradually increases toward the outside, and in particular, the descending speed increases rapidly near the peripheral wall 12b. This means that the coke C, which has been cooled to the required temperature, can be taken out as quickly as possible, its residence time in the fire extinguishing equipment can be shortened, and it can be continuously discharged in a completely dry state. As a result, the cooling capacity of the fire extinguishing equipment increases. Moreover, since the low temperature coke is taken out quickly, the average temperature within the fire extinguishing equipment becomes high, the temperature difference between the coke C and the cooling gas G becomes large, and the heat exchange efficiency between them is improved.

In the coke manufacturing method using the conventional fire extinguishing equipment (FIG. 1), coke is discharged from the center of the main body, so that the coke descending speed between the center and the peripheral wall is high, as shown in FIG. In the center, the blasting head blocks the coke from falling, and the coke falls at a slower rate. In the coke manufacturing method using the fire extinguishing equipment (Fig. 4) of this invention,
By causing the coke to continuously fall diagonally downward and outward from the bottom of the main body, the coke descending speed at the peripheral wall portion can be increased.

The configuration of the outlet of the discharge pipe 16 includes, for example, an opening/closing device 20 and a rotating discharge drum 27 as shown in FIG.
The dry-cooled coke is continuously discharged by controlling the opening degree of the opening/closing device and the rotation speed of the rotating drum. The use of a rotating drum system ensures continuous coke discharge and prevents atmospheric air from being sucked into the fire extinguishing equipment.

In addition, in the above embodiment, the number of discharge pipes 16 is 3.
Although it is a book, the present invention is not limited to this, and the number of books may be four or more. Also, main body 1
Although the cross section of No. 1 was circular, it may be a regular polygon.

FIG. 6 shows an example of an apparatus used in another embodiment of the invention.

The main body 21 consisting of a pre-chamber 22 and a cooling chamber 22a, a red-hot coke charging port 23, a blasting head 24, a cooling gas inlet pipe 28, a cooling gas discharge pipe 29, etc. are the same as those in the above embodiment. The take-out portion 26 extends obliquely downward and outward in a skirt shape, and opens in an annular shape directly below the main body 21 .

The coke C near the inner surface of the main body peripheral wall 22b descends unhindered by the blasting head 24 and is discharged from the bottom of the main body in a manner that it spreads outward. Therefore, as in the previous embodiment, the low temperature coke near the peripheral wall can be quickly removed.

As described above in detail, in the method for continuously producing cooled coke in the fire extinguishing equipment of the present invention, the coke discharge section extends diagonally downward and outward from the bottom of the main body, so that the coke falls closer to the peripheral wall. The speed will be higher. Therefore, the cooling capacity of fire extinguishing equipment should be increased (for example, from 60T/H to
80T/H), and furthermore, the heat exchange efficiency between coke and cooling gas can be increased.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of conventional fire extinguishing equipment. FIG. 2 is a graph showing the distribution of coke temperature and rate of descent in the radial direction in the equipment shown in FIG. 3, 4, and 7 show an example of fire extinguishing equipment used in the present invention, in which FIG. 3 is a longitudinal sectional view, and FIG. 4 is a sectional view taken along the - line shown in FIG. FIG. 7 is a longitudinal sectional view of the coke discharge section in FIG. 3. FIG. 5 is a graph showing the distribution of coke temperature and rate of descent in the radial direction in the equipment shown in FIG. 3. FIG. 6 is a longitudinal sectional view of a fire extinguishing equipment showing another embodiment of the present invention. 1, 11, 21...Main body, 3, 13, 23...
Red-hot coke charging port, 4, 14, 24... Blasting head, 6, 16, 26... Discharge section,
8, 18, 28... Cooling gas introduction pipe, 9, 19,
29...Cooling gas discharge pipe, 15...Body bottom plate, 2
0...Switching device, 21...Conveyor, C...Coke, G...Cooling gas, 27...Rotating discharge drum.

Claims (1)

[Claims] 1 A cylindrical body installed with the cylinder axis vertical, a red-hot coke charging port provided at the top of the main body, a cooled coke discharge port provided at the bottom of the main body, and a cooling gas provided at the bottom of the main body. In a fire extinguishing equipment equipped with an inlet pipe and a cooling gas discharge pipe provided near the top of the main body, the coke dry extinguishing equipment in which the discharge part extends diagonally downward and outward from the bottom of the main body is used to dryly extinguish coke. A coke dry extinguishing method characterized by cooling and continuously discharging the coke.