JPH07216357A - Method for compacting coal for charge into coke oven and apparatus therefor - Google Patents

Abstract

PURPOSE:To facilitate the release of the air introduced in the course of charging of coal and, consequently, to prevent an increase in pressure derived from expansion of the air, by forming an uneven compact layer as a top layer of charge coal when coal is introduced into a coke oven chamber and is then leveled by a leveler. CONSTITUTION:A roller 9 for the formation of an uneven surface is provided on the underside of the front end of a leveler 7 mounted on an extruder 6. Coal, for coke making from a coal charging car 3 is charged through a plurality of charging ports 2 which are openings located above a coke oven chamber 1. Then, a leveler 7 is inserted through an insert port 5 into the coke oven chamber 1 and moved forward and backward on the top surface of a stacked coal layer 8, and, at the same time, a compacted uneven stripe 81 is formed in the forward and backward directions of the leveler 7 on the top surface of the stacked coal layer 8. By virtue of this constitution, a protruded portion in the uneven stripe 81 serves to compact the coal, while the recessed portion serves to conduct evacuation. This constitution facilitates the release of the air included within the coal layer 8 and prevents an increase in pressure derived from expansion of the air, thereby maintaining the compact state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the leveling and consolidation of the upper coal in a coal bed charged in the carbonization chamber of a coke oven.

[0002]

2. Description of the Related Art In a coke oven, in order to increase the density of the coke obtained and to reduce the dispersion of the coke, a roller attached to a leveler is pushed on the coal bed at the end of charging the raw coal. It hits and reciprocates.

Conventionally, various measures have been proposed for efficiently and uniformly compacting the charged raw material coal ash.

For example, Japanese Unexamined Patent Publication No. 60-15487 discloses that the leveler of the pressure contact roller is adjusted every time the leveler reciprocates to increase the bulk density of the central portion in the width direction of the furnace. Further, in Japanese Patent Laid-Open No. 4-170494,
It is disclosed that coal as a charging raw material is compacted by a pressure roller before charging and dropped from an arbitrary position to make the bulk density in the furnace height direction uniform.

[0005]

However, in any case, even if the surface layer is compacted by the pressing roller,
Due to the atmosphere associated with the charged coal, the expansion of the atmosphere due to heating restores the pressure from the inside of the charged coal and destroys the consolidated state.

An object of the present invention is to provide a means for preventing a recompression pressure due to the atmosphere contained in the raw material coal charged into the carbonization chamber of the coke oven, and moreover, providing a sufficient surface pressure to the upper layer of the charged coal. To provide.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a method for consolidating charged coal, which comprises charging a coal in a coke oven carbonizing chamber and then inserting a leveler into the carbonizing chamber to level the charged coal. It is characterized in that an uneven consolidation layer is formed on the upper surface layer of coal.

The width and depth of the unevenness depend on the leveler size, the properties of the charged coal, etc., but a groove was formed in the forward / backward direction of the leveler during the conventional leveling operation of coal. The uneven line improves the accuracy of forming the consolidating layer for unevenness,
It is preferable from the viewpoint of reducing the cost of dry distillation promotion investment.

As an apparatus for forming the uneven consolidating layer, a leveler apparatus for pressing the upper surface of the coal charged in the coke oven carbonization chamber to level the upper surface and to form the consolidating layer, It is possible to use a device provided with a rotating body that forms the consolidation layer of the uneven strips by the reciprocating motion.

The arrangement of the irregularities on the roller surface is not limited in the width direction, but it is necessary to take care so that coal after consolidation is not scraped in the length direction.

Rollers of various shapes can be used to press the upper layer of the charged coal layer by rotation and to form irregularities, but a ball of an abacus having a protrusion formed in the circumferential direction is continuous. It is effective to use a roll structure such as the above-described arrangement, or a structure in which a concavo-convex surface is formed on the axial section of the roller without changing the operation procedure of the conventional leveling operation by the leveler.

[0012]

[Function] Since the pressing uneven surface is formed on the upper layer of the charged coal,
The convex portion forms the consolidation and the concave portion forms the exhaust function, the atmosphere contained in the coal layer is easily released, the recompression due to the expansion of the atmosphere is prevented, and the consolidated state can be maintained as it is.

Due to the convex portion of the pressure roll formed on the surface in the rotational direction, the surface pressure on the coal layer at that portion increases, and the overall consolidation increases.

When the tip angle of the convex portion is 60 to 150 degrees, a desirable result is obtained for the above reason.

Further, if it is less than 60 degrees, the direction of the surface pressure acting on the coal originally moves from the target vertical direction to the horizontal direction, the compaction range is narrowed, and the convex portion of the coal is weakened. The consolidation effect cannot be obtained. On the other hand, when the temperature exceeds 150 degrees, the surface pressure acting direction on the coal originally concentrates in the vertical direction of the target, but the atmosphere contained in the coal bed becomes difficult to be released (exhaust function declines). Can not be obtained the consolidation effect.

For this reason, the tip angle of the convex portion is 90 degrees to 11 degrees.
0 degree is more preferable.

[0017]

EXAMPLE FIG. 1 is a side view showing the outline of a carbonization chamber of a coke oven in which the present invention is carried out.

In the figure, reference numeral 1 denotes a carbonization chamber of a coke oven, and raw coal from a coal charging vehicle 3 is charged through a plurality of charging ports 2 opening above the carbonization chamber 1 to form a coal layer. Form. Reference numeral 4 represents an ascending pipe for releasing gas generated during coal carbonization. A leveler insertion port 5 is provided below the ascending pipe 4, and a leveler 7 attached to the extruder 6 from the insertion port 5 is moved forward and backward on the upper surface of the laminated coal layer 8 at the latter stage of coal charging. Flatten the surface of the coal layer 8.
On the lower surface of the tip of the leveler 7, two rollers 9 for forming unevenness for forming an uneven surface for consolidation are provided.
As a result, compacted uneven ridges 81 are formed on the upper surface of the laminated coal layer 8 in the forward / backward direction of the leveler 7.

2 and 3 show examples of the shape of the roller 9 for forming the unevenness, which is attached to the leveler 7, as seen from a plane.

FIG. 2 shows, as an example of the roller 9 for forming irregularities, a roll structure in which spheres of an abacus having protrusions formed in the circumferential direction are continuously arranged.

This abacus spherical roller 10 has three rows in front,
Two rows are arranged in the rear, and the intervals of the row of the recessed portions, which have been consolidated, are formed to be close. The tip angle θ of the convex portion of the abacus spherical roller for forming the unevenness affects the consolidation and the gas release in the coal layer, and when the tip angle θ of the convex portion is 90 degrees, the excellent consolidation depth is obtained. Was obtained. When the same laminated coal in the same furnace was subjected to the consolidation treatment using a roll having the same diameter and using this pressure roll that does not form the uneven surface, in the case shown in FIG. Whereas the flat roll averaged about 30 mm, in the case of the present invention, consolidation was performed to a depth of 42 mm. Also, the tip angle is 90 degrees or more and 110 degrees or less, and this angle range is excluded 60
As a result of conducting from 150 degrees to 150 degrees, 90 degrees to 11 degrees
It was good in the order of 0 degree and 60 degrees to 150 degrees.

FIG. 3 shows, as an example of the roller 9 for forming the unevenness, an example of a roller 11 having flat peaks and troughs on a normal leveler pressing roll.

In addition, in place of the roll for forming the ridges and valleys in the raw coal layer for charging, spike-like or wart-like ridges and valleys may be formed on the roll surface, and some effects can be expected.

[0024]

The present invention has the following effects.

(1) Since the maximum pressure portions by the rolls are alternately formed and the surface area is also increased, the atmosphere introduced accompanying coal charging is sufficiently released, and the deepening of consolidation is achieved. And uniformity is achieved.

(2) Therefore, by achieving the consolidation of the upper layer of the charging raw material coal, the distance between the particles of the coal powder is shortened, the softening and melting property of the upper coal during carbonization is improved, and the coke quality, especially the strength, is improved. Can be improved.

(3) Since the apparatus itself has a simple structure, good quality coke can be obtained without changing the structure of the conventional coke oven.

[Brief description of drawings]

FIG. 1 shows a structure of a carbonization chamber of a coke oven in which the apparatus of the present invention is arranged.

FIG. 2 shows an example of one shape of a pressure roll.

FIG. 3 shows another embodiment of a pressure roll.

[Explanation of symbols]

 1 Coke oven carbonization chamber 2 Coal charging port 3 Coal charging vehicle 4 Ascending pipe 5 Leveler insertion port 6 Extruder 7 Leveler 8 Laminated coal layer 81 Upper layer consolidation layer of laminated coal layer 9 Pressing roller 10 Abacus spherical roller 11 Unevenness roller

Claims (2)

[Claims] 1. After charging coal into a coke oven carbonization chamber,
A method for consolidating charged coal by leveling the charged coal by inserting a leveler into the coking chamber, wherein the charged coal is compacted into a coke oven by forming an uneven consolidating layer on the upper surface layer of the charged coal. 2. In an apparatus for pressing the coal charged in a coke oven carbonization chamber from the upper surface to level the upper surface and to form a consolidation layer, a rotor for forming irregularities on a contact surface with the charged coal. A device for consolidating coal charged into a coke oven equipped with.