JPS6187783A - Apparatus for producing coke - Google Patents

Abstract

PURPOSE:To improve the strength and productivity of coke, by applying pressure to the top surface of coal powder to inhibit free expansion of the surface layer of coal powder during dry distillation and also to prevent sponge coke having a low strength from being formed in the surface layer of coke. CONSTITUTION:A pressure block-introducing device 16 provided with a pressure block 15 at the lower side thereof is introduced into the upper part of a coking chamber 1 through a guide roll 18 and an elevating guide roll 19 from a small door hole 17 provided on a back door 12. The device 16 is moved to-and-fro several times between the back door 12 and the front door 11 of the coking chamber to level the uneven surface 13 of the upper layer of coal powder. The block 15 is then detached from the device 16 and placed on the surface of the coal powder layer, and the device 16 is drawn out through the small door hole 17. After dry distillation, a pulley device 22 is introduced into the chamber 1 through the hole 17 and attached in a similar manner to the detachment of the block 15, before coke formed is pushed out to the side of a guide car 9 by means of a pushing ram.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a coke production apparatus for producing coke from blended pulverized coal, particularly coke suitable as a blast furnace raw material.

[Conventional technology]

With the recent increase in the size of blast furnaces, there is a need to address both the quantity and quality of coke as a raw material for iron manufacturing.

Conventionally, when carbonizing blended pulverized coal to produce coke, a room furnace type coke production apparatus as shown in FIG. 3 has been used.

FIG. 3 is a schematic cross-sectional view of a coke manufacturing apparatus using the chamber furnace method.

In Fig. 6, 1 is a coke oven carbonization chamber, 4 is a pulverized coal charging car, 5 is a pulverized coal charging inlet, 6 is an extrusion ram, 7 is a repeller, 8 is an extruder, 9 is a coke guide car, 10 is a fire extinguisher, 11 is the front door and 12 is the back door.

In indoor furnace coke production using the conventional coke production apparatus shown in FIG.
Powdered coal is charged into a carbonization chamber 1 by letting it fall naturally through a charging port 5.

The pulverized coal has a peak just below each charging port 5 and forms a mountain according to the angle of repose of the pulverized coal, and the pulverized coal charging surface becomes an uneven surface 13. Then, a leveler 7 attached to the extruder 8 smooths out the uneven surface 13 to make the top surface of the charged coal uniform. Thereafter, the powdered coal is heated to about 1000° C. over 15 to 25 hours by heat transfer from the combustion chambers on both sides of the carbonization chamber 1, and carbonized. The red-hot coke produced after carbonization is loaded into a fire extinguishing truck 10 via a coke guide car 9 by an extrusion ram 6 that is attached to an extruder 8 .

The cross section of the carbonization chamber 1 at the end of the carbonization of the produced coke is normally as shown in FIG. In FIG. 4, 2 is a combustion chamber, and 3 is a furnace wall. As shown in FIG. 4, the upper surface layer of the coke is in contact with the free expansion surface, and sponge coke 14 with low strength is generated in that portion.

Further, the pulverized coal charged in the upper part of the carbonization chamber 1 has a smaller packing density than the lower part, and the quality of the produced coke tends to be poor. As described above, reducing the difference in coke quality depending on the position within the carbonization chamber 1 is an important issue in the coke manufacturing method using the room furnace method.

As a solution to this problem, conventional devices have been used to increase the bulk density of the pulverized coal and make the packing density uniform by applying pressure to the upper surface of the pulverized coal that has been leveled with a leveler. "Filling device", Japanese Patent Publication No. 59-18435 "Pulverized coal pressurizing device in coke oven".

Japanese Patent Publication No. 59-1843+5@Pulverized Coal Pressure and Vibration Filling Apparatus for Coke Ovens" and Japanese Patent Publication No. 59-18437 - Powdered Coal Pressure and Vibration Filling Apparatus for Coke Ovens" have been proposed.

However, these devices cannot restrain the free expansion of the surface layer of pulverized coal during carbonization.

[Problem that the invention seeks to solve]

The present invention has been made to solve the problems of the prior art described above. In other words, by applying pressure to the top surface of the pulverized coal, free expansion of the surface layer of the pulverized coal during carbonization is suppressed, and the formation of sponge coke with low strength in the surface layer of the top surface of the coke is eliminated, thereby improving coke strength and productivity. The purpose of the present invention is to provide an improved coke manufacturing equipment.

c) Means for Solving Problems] The present invention aims to prevent the generation of sponge coke, which is a problem in the above-mentioned indoor furnace coke manufacturing method, by adding a method to the surface layer of the upper surface of pulverized coal in an indoor furnace coke manufacturing apparatus. a pressurizing block for placing the pressurizing block on the lower side, a pressurizing block insertion device for inserting the pressurizing block into the carbonization chamber to also level the upper surface of the powdered coal in the carbonization chamber, and placing the pressurization block on the upper surface of the powdered coal; This coke manufacturing apparatus is comprised of an unloading device for taking out the processed waste block out of the furnace before taking out the coke block, and a conveying device for moving the pulled out pressurizing block to the inserting device.

The present invention will be explained below based on the drawings which are embodiment examples.

〔Example〕

1 and 2 are a cross-sectional view and a plan view of the coke manufacturing apparatus of the present invention.

1 and 2, 15 is a pressure block, 16 is an insertion device, 17 is a small door opening, 18 is a guide roller, 19 is an elevating guide roller, 2° is a flexible hook, 21 is a hook,
22 is a delivery device, 23 is a transport vehicle, and 24 is a rail.

A pressurizing block insertion device 16 with a pressurizing block 15 mounted on the lower side is passed through a small door opening 17 provided in the back door 12 through a guide roller 18 and an elevating guide roller 19 into the carbonization chamber 1.
Insert into the inner upper part.

After repeatedly moving the insertion device 16 forward and backward several times from the back door 12 to the front door 11 of the carbonization chamber 1 in order to even out the uneven surface 13 of the upper layer of powdered coal, the pressurizing block 15 is inserted into the insertion device 1.
6, place it on the surface of the pulverized coal, and pull out the insertion device 16 from the small door opening 17. In this embodiment example, the pressurizing block 15 is attached and detached from the insertion device 16 using a flexible hook 20 attached to the insertion device 16 and a hook 21 embedded in the pressurizing block 15. Various methods can be considered for this attachment/detachment method, not limited to the present embodiment example, but it is preferable to use a mechanism that has a short length in terms of volumetric efficiency of the carbonization chamber 1, and the function and insertion device are not limited to the high temperature carbonization chamber. 16
The design must maintain sufficient beam strength.

In addition, the specifications of the pressurizing block 15 are such that it can withstand the final carbonization temperature of approximately 1000°C, and is also subject to repeated heating and cooling cycles between the temperature outside the furnace and the room temperature.
A 50+ac carbonization chamber with a length of 17 m weighs approximately 900 kg.

After carbonization, before the extrusion ram 6 pushes out the produced coke to the guide wheel 9 side, the pull-out device 22 is inserted into the carbonization chamber 1 furnace through the small door opening 17, and the pressurizing block 15 has the same function as the above-mentioned detachment. and attach it. At this time, the coke surface level in the carbonization chamber 1 is lower than when it was charged.

Therefore, the drawer [22] has a system in which the main body itself or the lifting hook 20 can be automatically lowered and attached so as to correspond to the level fluctuation of the pressurizing block 15.

Furthermore, before installation, a device (not shown) for cleaning coke powder covering the pressurizing block 15 with gas is attached to the extraction device 22 as necessary. Note that, like the insertion device 16, the withdrawal device 22 also needs to have heat resistance in terms of function and strength.

After the pressurizing block 15 is pulled out of the furnace through the small door opening 17, it is released from the pull-out device 22, and in the case of this embodiment example diagram,
It is supported by four lift guides 19. As the elevating guide roller 19 descends, the pressurizing block 15 is loaded onto the transport cart 23.

The carriage 23 moves on the rails 24 to below the insertion device 16. Here, as the elevating guide roller 19 rises, the pressurizing block 15 is attached to the insertion device 16, and is again placed on the upper surface of the powdered coal charged in another carbonization chamber in the above-described operation procedure.

In order to reduce heat loss and speed up the carbonization of the surface layer of pulverized coal, the pressurizing block 15 is desirably inserted into the furnace with a shortened heat radiation time outside the furnace.

〔Effect of the invention〕

According to the coke manufacturing apparatus of the present invention, by applying the pressurizing force due to the gravity of the pressurizing block to the leveled upper surface of the charged pulverized coal, it is possible to reduce the difference in coke strength between the upper and lower parts of the coking chamber.

The present invention suppresses the free expansion of the upper surface layer of pulverized coal by continuing to pressurize it with a pressure cube block throughout the entire carbonization period, thereby preventing the formation of sponge coke with low crushing strength and improving coke quality and productivity. This has the effect of improving

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 and 2 are a cross-sectional view and a plan view for explaining practical embodiments of the present invention, FIG. 6 is a cross-sectional view of a coke production apparatus using a room furnace method, FIG. 4 is a longitudinal cross-sectional view of the carbonization chamber at the end point of carbonization. In the figure, 1... carbonization chamber, 2... combustion chamber, 5...
Powdered coal charging inlet, 6... Extrusion ram, 7... Leveler, 8
14 is an extruder, 14 is a sponge coke, 15 is a pressurizing professional extraction device, and 26 is a transport vehicle. Note that the reference numerals in the middle of each drawing indicate the same or corresponding parts.

Claims (1)

[Claims] In an indoor furnace type coke manufacturing apparatus in which powdered coal is charged into a coke oven carbonization chamber and carbonized, a pressurizing block is placed on the surface layer of the upper surface of the powdered coal, and the pressurizing block is attached to the lower side, and a pressurizing block insertion device that is inserted into the carbonization chamber and placed on top of the pulverized coal for leveling; a pull-out device that takes the pressurizing block out of the furnace before pushing out the coke produced; and a pressurizing block that is pulled out. A coke manufacturing apparatus comprising: a conveying device for moving blocks to the insertion device.