JPS601910B2 - Coke dry cooling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for dry cooling red-hot coke produced at a steelworks, gas company, etc. using an inert gas.

Generally, shaft furnace type (also referred to as bunker type) and chamber type are known as coke dry cooling devices.

In the shaft furnace type, a bucket that receives red hot coke from a coke oven is rolled up and transported to the top of the shaft furnace, the red hot coke is introduced into the shaft furnace from the top, and is cooled with inert gas in the shaft furnace. method,
Suitable for plants that produce large quantities of coke of a certain grade, such as coke for blast furnaces, where it is necessary to recover heat from red-hot coke to obtain high-temperature, high-pressure steam. There are problems such as high equipment costs and operation and maintenance costs.

On the other hand, the chamber type receives red-hot coke from a coke oven and stores it in a cooling chamber.
This method uses inert gas to cool the coke in the bucket inside the tank, and batch processing of each bucket is possible.
It can also be applied to factories that produce multi-grade coke, and if the high-temperature, high-pressure steam that can be obtained with the shaft furnace method described above is not required, the equipment and operating costs are relatively low.
It is more economical than the shaft furnace type. As an example of this chamber type, there is a device as shown in FIGS. 1 and 2.

In the case of this device, the coke bucket 9 that has received red hot coke from the coke oven is loaded onto a truck (not shown) that can run on rails 11 and is delivered to the chamber main body 1 in front of the entrance door 10 of the cooling chamber 3. After being transported, only the coke bucket 9 is moved from the entrance door 10 side onto the seal 8 and stored at a predetermined position in the cooling chamber 3.

After the coke bucket 9 is stored in a predetermined position, the lower flange of the coke bucket 9 and the upper part of the blowing duct 7 are connected, the inlet door 10 is closed, and the blower 5 is driven (not shown). Inert gas is sent from an inert gas storage source to a circulation duct 6, and is blown from the circulation duct 6 into a coke bucket 9 via a blowing duct 7.

The inert gas moves upward from below and removes the sensible heat from the red-hot coke, and as a result, the coke is cooled, while the inert gas becomes a high-temperature gas and passes through the cooling chamber 3 from the upper part of the coke bucket 9. The water is sent to the upper flue 4, and from the upper flue 4, it is guided to the boiler 2 provided at the upper part of the chamber body 1, where the boiler water is heated to generate steam, the heat is recovered, and the water is cooled. The coke is then sucked into the blower 5 again through the circulation duct 6, and thereafter the coke is cooled and heat is recovered in the same manner as described above. Note that C is red-hot coke. However, the above-mentioned conventional equipment requires a cooling chamber to store the bucket, so the structure is relatively complex, the cooling chamber accounts for a large proportion of the total equipment cost, and when the bucket is taken in and out, the Air from the atmosphere flows into the chamber, and during the cooling process of the red-hot coke, a part of the coke is burned by the air sealed in the chamber, resulting in an undesirable loss of coke combustion, and also causes the inert gas in the system to burn. The risk of explosion must be taken into consideration due to air being mixed in, and furthermore, when the bucket is stored in a cooling chamber, the coke bucket becomes overheated and its durability is significantly reduced, requiring a great deal of maintenance and efficiency. It has drawbacks such as being expensive.

Therefore, recently, as a method to eliminate the above-mentioned drawbacks, a third method,
A device as shown in Figure 4 was devised (Tokukoshi Sho 53).
-75634).

This device has a movable coke bucket 9 with a ventilation slit 17 at the bottom and a bucket hood 13 with a connecting pipe 14 attached removably at the top, and an upper part connected to a boiler 2 as a heat recovery means. The inlet side of the flue 4 has a connecting pipe 12 that can be connected to the connecting pipe 14 of the bucket hood 13, and furthermore, the gas from the boiler 2 is connected to the outer periphery of the coke bucket 9 housed in the cooling chamber 3. The opening 16 is connected to the chamber body 1.
This is the configuration shown on the side.

Note that 15 is a cold air passage which is connected to the circulation duct 6 of the boiler 2, and is connected to the above-mentioned closure 16.

The purpose of the present invention is to improve the apparatus shown in Figs. 3 and 4, further simplify the structure, reduce the combustion loss of coke, eliminate the risk of explosion, and prevent the generation of soot and dust. The coke bucket has a ventilation distributor and a subsequent ventilation pipe for introducing gas into the distributor at the bottom, and a bucket hood with a 9E ventilation connection pipe that is detachably attached to the top of the coke bucket. The air duct connected to the heat recovery means is provided with a connecting pipe connectable to the aE air connection pipe of the bucket hood, and the coke is connected to the air duct that leads gas from the heat recovery means via the air blowing means. Equipped with a connecting pipe that can be connected to the bucket's ventilation connecting pipe,
The gist of the present invention is a coke dry cooling apparatus characterized in that the coke bucket is configured to form a closed gas circulation system when the coke bucket is installed at a predetermined position.

Embodiments of the present invention will be described below with reference to the drawings.

5 and 6, 20 is a coke bucket with an insulated structure, 21 is a removable airtight bucket hood, 2
2 is a 9E wind connection pipe attached to the hood 21, 23 is a boiler as a heat recovery means, and 24 is a blower.

A blower connecting pipe 25 is attached to the bottom of the coke bucket 20, and a lower connecting pipe 27 connectable to the upper wheeling air connecting pipe 5 is attached to the blower duct 26 connected to the blower 24.

Further, an upper connecting pipe 29 connectable to the exhaust air connecting pipe 22 is attached to the Enoki E wind duct 28 connected to the boiler 23. Note that the boiler 23 and the blower 24 are, for example, the first
The lotus shown in the picture is suitable. Furthermore, the air connection pipe 2
5. Lower connecting pipe 27, exhaust connecting pipe 22 and upper connecting pipe 2
A gas cutoff device (for example, a cutoff valve) 30 is provided inside each of the coke buckets 9, and a gas cutoff device (for example, a cutoff valve) 30 is provided in the lower part of the coke bucket 20, as shown in FIG. A ventilation distributor 31 is provided, and gas is introduced into the distributor 31 from the ventilation connection pipe 25.

With the above configuration, the coke bucket 20 loaded with the red-hot coke C is covered with the bucket hood 21 immediately after being disposed of in the coke oven (not shown) to prevent soot and dust from being generated from the upper part of the bucket.

This coke bucket 20 is transported to a predetermined position and fixed at that position. At this time, connect the artificial wind mirror tube 22 of the bucket hood 21 to the upper connecting tube 29 of the exhaust duct 28,
Further, the ventilation connection pipe 25 at the bottom of the coke bucket 20 is connected to the lower connection pipe 27 of the ventilation duct 26. In addition, the shutoff devices 30 and 3 inside each of the air connection pipe 25 and the exhaust air connection pipe 22
0 are closed while the coke bucket 20 is being transported to a predetermined position as described above, and are opened at the same time as the aforementioned reinforcing wire, and similarly the cutoff devices 30 inside each of the lower connecting pipe 27 and the upper connecting pipe 29 are closed. , 30 are also opened at the same time as the connection, and a closed gas circulation system is formed while the red hot coke C is being cooled after the connection. Next, when the blower 24 is driven,
The cooling inert gas is supplied to the air duct 26 and the connection pipe 27.
, 25, and is blown into the coke bucket 20 from the bottom thereof through a distributor 31 so as to uniformly cool the red-hot coke C. The cooling inert gas heated by cooling the red-hot coke C is transferred to the coke bucket 20.
Passing through the upper part, the bucket hood 21 and the connecting pipes 22, 2
9 and the exhaust duct 28 to the boiler 23, where the boiler water is heated to generate steam and the heat is recovered, so that the gas is cooled and sent to the blower 24. Aspirated and recirculated.

In addition, before removing the ventilation connection pipe 22 and the ventilation connection pipe 25,
The shutoff devices 30, 30 of the upper and lower connecting pipes 29, 27 are kept closed.

This is done after the connection pipes 22 and 25 are connected to the ducts 26 and 2.
This is to prevent oxygen from entering, as there is a risk of an explosion if oxygen enters the duct (because the oxygen reacts with the flammable gas mixed in the gas in the duct). With the configuration and operation described above, the present invention exhibits the following excellent effects.

(i) It has an extremely simple structure and can be easily attached and detached.

This is because in the case of Figs. 1 and 2 and the case of Figs. 3 and 4, it is necessary to provide a chamber main body 1 having a cooling chamber 3, and the structure is complicated, but in the present invention, as described above, the structure is complicated. This is because the chamber body becomes an ominous key. (i
i) Thermal efficiency is improved by making the bucket and bucket hood have an insulating structure. qii) The bucket hood prevents soot and dust from being generated during transportation from the coke oven, and does not require attachment or detachment during cooling.

As mentioned in item (i) of G above, since the bucket functions as a conventional cooling chamber, there is no need for a bucket or a cooling chamber for storing coke, which is economical.

M Since the amount of air mixed into the cooling gas can be minimized, the combustion loss of coke can be reduced and the risk of gas explosion during operation can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional device, Fig. 2 is a D-Ro visual loss diagram of Fig. 1, Fig. 3 is a block diagram of a recently devised device, and Fig. 4 is a W-W diagram of Fig. 3. 5 is a configuration diagram of the apparatus of the present invention, and FIG. 6 is a view taken from the N arrow in FIG. 5. 20...Coke bucket, 21...Bucket food,
22... Exhaust connection pipe, 23... Boiler,
24...Blower, 25...Blower connecting pipe, 26...Blower duct, 27...Lower connecting pipe, 28...Blower duct, 29... Upper connection pipe, 31... Ventilation distributor. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A coke bucket having a ventilation distributor and a ventilation connection pipe for introducing gas into the distributor at the lower part, and a bucket with an exhaust connection pipe that is detachably attached to the upper part of the coke bucket. an air exhaust duct connected to the heat recovery means, the air exhaust duct having a connecting pipe connectable to the air exhaust connection pipe of the bucket hood, and a ventilation duct for guiding gas from the heat recovery means via the air blowing means. , a dry cooling method for coke, comprising a connecting pipe connectable to a blower connecting pipe of the coke bucket, and configured to form a closed gas circulation system when the coke bucket is installed at a predetermined position. Device. 2. The coke dry cooling device according to claim 1, wherein a gas cutoff device is provided inside at least one of the connecting pipes of the exhaust duct and the blower duct.