JPS5918437B2 - Pressure/vibration filling device for pulverized coal in a coke oven - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention applies pressing force and vibration force to the top surface of pulverized coal that has been leveled after being charged into a coke oven carbonization chamber using a rolling down beam having an external vibrator. The present invention relates to a pressurizing/vibration filling device for charging pulverized coal in a coke oven carbonization chamber that increases the bulk density of the pulverized coal.

An overview of large-scale industrial coke oven equipment is shown in Figures 1 and 2.
As shown in the figure, the coke oven carbonization chamber A has, for example, a width of 0.4 to 0.5 m, a height of 5 to 6 m, and a length of 14 to 15 m from the back side to the front side. ,
Opening/closing doors 1 and 2 are provided on the front and back sides, respectively, and four to five pulverized coal inlets 3 are provided at the top.

Such a coke oven carbonization chamber A has a combustion chamber B disposed therebetween.
0 to 100 chambers are arranged side by side to constitute a furnace group, and the upper part of the furnace group is connected to a pulverized coal charging vehicle C having a number of pulverized coal hoppers 4 corresponding to the pulverized coal charging inlets 3 of the carbonization chamber A. The pulverized coal is charged into each carbonization chamber A by traveling in the direction shown in FIG.

The pulverized coal is charged into the carbonization chamber A up to about 80% of its height, or an uneven surface 5 with a top is formed directly below each charging port 3 according to the angle of repose of the pulverized coal (36° to 40°). .

On the back side of the coke oven bank, there is disposed a leveler D for leveling the uneven surface 5 of the charged pulverized coal, and a traveling cart F carrying a pusher E for pushing out the produced coke from the carbonization chamber A. There is.

That is, the leveler D is located at the upper level of the extruder E, and after charging the pulverized coal, it moves forward and backward several times from the back side to the front side of the carbonization chamber A, thereby evening out the uneven surface 5 of the charged pulverized coal. This is to secure the generated gas path 6, and to explain one example thereof, as shown in FIG. A beam main body 1 consisting of partition plates 10, 10, . It is equipped with a beam driving means 1-2 for moving the main body 8 forward and backward through a small door lower provided at the upper part of the back line 2 of the carbonization chamber A.

The beam driving means 12 consists of a driving drum 13 installed on a traveling truck F, front and rear fixed guide sheaves 14, 14, and an endless rope 15 wound around these.
It is tied to the rear part of.

Therefore, by rotating the drive drum 13 in the forward and reverse directions, the beam main body I can enter and exit the carbonization chamber A over the entire length thereof, and the partition plate 10 scrapes the uneven surface 5 of the powdered coal to level it.

After producing coke, the extruder E installed at the lower level of the leveler D opens the front and back lines 1 and 2 of the carbonization chamber A, pushes its extrusion ram 17 into the carbonization chamber A, and transfers the generated coke to the front door 1 side. It is pushed out and discharged to a fire extinguisher H through a coke guide car G.

The above is an overview of coke oven equipment, and the strength of dry distilled coke produced in such a coke oven is improved by increasing the charging bulk density of charged pulverized coal.

This is known both theoretically and empirically because the larger the bulk density, the smaller the distance between powdered coal particles.

In other words, the particle size of powdered coal is 3 mm or less, 85%, and the moisture content is 8.
% of pulverized coal as an experimental material, and looking at the relationship between the deposition depth → and the bulk density (m1m') by changing the falling height from the charging port.
As shown in Figure 4a, the larger the falling height and the larger the deposition depth, the larger the bulk density becomes.
) and the cold strength index (Koto0(g)) are shown in Figure 4 S and Figure 4 C, respectively; the greater the bulk density of the charged pulverized coal, the greater the strength of the produced coke I understand that.

Conventionally, pulverized coal has been charged into the coke oven carbonization chamber by falling naturally from the top of the furnace, as described above.At the bottom of the coke oven, the falling height is large and the compaction effect due to the accumulated weight is large. Although the bulk density increases, the higher you go to the top, the lower the bulk density becomes.

With such a bulk density distribution in the furnace, the strength and quality of the produced coke are uneven, and no improvement in productivity can be expected.Especially when weakly coking coal is used, the coke has a low ring strength, making it difficult to manufacture pig iron. When charged into a blast furnace as a reducing agent, it becomes difficult to maintain air permeability and liquid permeability due to an increase in the pulverization rate, which may cause problems such as a decrease in productivity and other problems in blast furnace operation.

The present invention advantageously solves the above-mentioned problems by:
In order to make the bulk density of the pulverized coal charged in the carbonization chamber almost uniform from the lower layer to the upper layer, a pressing force is applied to the leveled upper surface of the charged pulverized coal using a rolling beam equipped with an external vibrator. The present invention also provides a pressurization/vibration filling device that applies vibration force.

That is, according to the device of the present invention, as a physical force,
By applying pressing force and vibration force to the level of the charged pulverized coal and the ringed upper surface, the bulk density of the pulverized coal can be increased uniformly in the top and bottom and width directions of the coking chamber, thereby improving productivity and ring packing. It enables the production of high-strength coke, and the gist of its configuration is that it is installed so that it can enter and leave the entire length of the coke oven in contact with the top surface of the pulverized coal that has been levered after being charged into the coke oven carbonization chamber. Pressure is applied to the entire lower surface in the direction or the lower surface at the required pitch interval.
A beam main body having an excitation bottom plate, a beam lowering means for lowering the beam main body while maintaining it horizontally after entering the carbonization chamber, and a vibrator attached to the rear end portion of the beam main body. It is characterized by the fact that

Hereinafter, an embodiment in which the leveler beam itself is used as the beam body of the pulverized coal pressurization/vibration filling apparatus of the present invention will be described in detail with reference to the drawings.

In FIGS. 5 and 6, 1 indicates two long side plates 9, 9.
and partition plate 1 installed at the required pitch in the longitudinal direction.
0, 10, etc. The beam main body is composed of a large number of bottom sections, and the bottom surface of the beam main body 1 has a pressure/vibration device on the entire bottom surface or on the bottom surface at required pitch intervals. A bottom plate 18 is attached.

As shown in FIG. 7, an opening 19 is formed in the bottom plate 18 to prevent pulverized coal from remaining in the section of the beam body 1 when leveling is performed as a leveler.

In FIG. 5, the beam main body 1 has its rear portion mounted in a movable trolley 20 so as to be able to be raised and lowered by an elevator drive 21, and any driving means such as an air motor or an electric motor at a suitable location always located outside the furnace. A vibrator 22 driven by is attached.

In FIG. 6, the beam body l is formed in a bending portion 8' whose rear portion is movably mounted on the tilting movable carriage 20, and the beam body l is formed in a bending section 8' which is movably mounted on the tilting movable carriage 20', and the beam body L is formed in an appropriate manner to move the beam body directly with respect to the inclined movable carriage 20'. A driving means 21' is provided.

The beam main body l is moved together with a moving carriage 20, 20' by a beam driving means U similar to that shown in FIG. In the case shown in FIG. 6, by operating the driving means 21', the beam body 1 can be lowered onto the leveled upper surface of the pulverized coal in the carbonization chamber A while keeping it horizontal.

To explain the operation of the pulverized coal pressurization/vibration filling device having the configuration described above, the pulverized coal charged into the coke oven carbonization chamber A has a conical top on its upper surface directly below each charging port 3. Since it has an uneven surface 5, it is necessary to level it first.

During this leveling, the beam main body 1 is
Alternatively, the beam driving means U, which is clamped and fixed as a pair with 20' and is comprised of a driving drum 13 and an endless rope 15 shown in FIG.

The beam main body 1 breaks down the convex portions on the upper surface of the pulverized coal, and levels it with the partition plate 10, thereby leveling the upper surface of the pulverized coal.

After leveling two or three times, the beam body 1 is unclamped from the movable trolley 20 or 20' and the lifting drive unit 21
Alternatively, actuate the driving means 21' to lower the beam body L onto the leveled upper surface of the pulverized coal, and at the same time or after this pressure lowering, the vibration exciter 22 attached to the rear part of the beam body J is activated. Activate to pressurize and vibrate the powdered coal.

In addition, due to this filling, approximately 200
Consolidation settlement of around mm is carried out.

The vibration force generated by the vibrator 22 attached to the rear part of the beam body 1 that is always located outside the furnace is transmitted to the entire beam body 1, and the pressurization and vibration on the upper surface of the pulverized coal are completed in a relatively short time.

The filling pressure, vibration frequency, acceleration, etc. directly from the beam body to which vibration is transmitted by the vibrator 22 are set so that the bulk density of the upper layer of the powdered coal, which has been leveled after being charged into the carbonization chamber A, is approximately equal to that of the bottom layer. Needless to say, they are selected appropriately.

After pressurizing and vibrating the pulverized coal in the carbonization chamber A, the beam main body 1 is raised above the pulverized coal surface by operating the lifting drive unit 21 or the driving means 21', and the beam main body 1 is moved by the beam 1 driving means 12 onto the cart 20. Or it is made to exit from the carbonization chamber A together with 20'.

After this, the bottom plate 1 for pressurization and vibration on the lower surface of the beam main body 1
8 is formed with an opening 19, so that the beam body l
No powdered coal remains in the compartment.

Although the apparatus shown in FIGS. 5 and 6 is an example in which the leveler beam is also used as the beam main body l, the beam main body l may be provided separately from the leveler beam, and in that case, pressurization and There is no need to provide an opening 19 in the excitation bottom plate 18.

According to the device of the present invention, with the beam body sufficiently advanced into the carbonization chamber, pressing force and vibration force are applied to the leveled upper surface of the pulverized coal by the entire beam body, and pressurization and vibration filling can be performed at once. To explain an example of the pressurized vibration filling work, in a coke oven carbonization chamber of 32 m3, the filling surface pressure due to the pressure drop of the beam body is 1.5 s × 1
o-”kg/recitation, frequency 3600VPM, vibration acceleration 1
．． 5m/5ec2, vibration time 3 When working with QSCC, it was found that the bulk density of the charged pulverized coal was 1.5m within a depth of 1rrL from the upper layer of pulverized coal in the carbonization chamber. 0 per On'
．． Add 1ttIrL to the core, and the coke powder ratio is 2.
．． It decreased by 88%.

As explained above, according to the pulverized coal pressurization/vibration filling device of the present invention, it is possible to produce coke that has high ring strength and is almost uniform, thereby improving the productivity of coke oven operation. In addition, it serves as a reducing agent with a low powderization rate during blast furnace operation, and greatly contributes to improving the operational productivity of blast furnaces.

[Brief explanation of drawings]

Figures 1 and 2 are a side view and a plan view showing an overview of coke oven equipment, Figure 3 is a side view showing an example of a leveler, and Figures 4 a, b, and c are cold models of pulverized coal and produced coke. A diagram showing the test results, FIG.
FIG. 6 is a side view of the device of the second embodiment, and FIG. 7 is an enlarged sectional view of the beam body. A: Coke oven carbonization chamber, B: Combustion chamber, C: Powdered coal charging vehicle, D: Leveler, E: Extruder, F... Traveling trolley,
G...Coke guide car, H...Fire engine, 1...Front door, 2...Back ruled line, 3...
... Powder coal charging inlet, 4 ... Powder coal hopper, 5.
...Uneven surface, 6...Generated gas path, I...
...Small door opening, l...Beam body, 9...
...Side plate, 10...Partition plate, 11...
... Guide roller, 12 ... Beam driving means, 13 ... Drum for drive, 14 ... Fixed guide sheave, 15 ... Endless rope, 1
6...Clip, 17...Extrusion ram, 18...Bottom plate for pressurization/vibration, 19...
・Opening part, 20...Moving trolley, 21 Elevating drive machine, 22... Vibrating machine.

Claims (1)

[Scope of Claims] 1. Provided so as to be able to enter and exit over the entire length of the coke oven in contact with the upper surface of the pulverized coal that has been leveled after being charged into the coke oven carbonization chamber, and to be applied to the entire lower surface in the longitudinal direction or to the lower surface at required pitch intervals. A beam body having a pressure/vibration bottom plate, a beam lowering means for lowering the beam body while maintaining it horizontally after entering the coal chamber, and a vibrator attached to the rear end portion of the beam body. A pressure/vibration filling device for pulverized coal in a coke oven, characterized by comprising: 2. The beam main body is mounted on a beam entry/exit cart so as to be movable up and down, and after entering the carbonization chamber, the beam main body is lowered onto a front blending vehicle to perform rolling down. The pressurization/vibration filling device for pulverized coal in a coke oven according to item 1. 3 The beam main body is partially bent in a dogleg shape at the rear, and the bent part is movably mounted on the inclined part of the beam entry/exit truck, and the beam main body is bent on the inclined part when the wave enters the carbonization chamber. 2. The pressurizing/vibratory filling device for pulverized coal in a coke oven according to claim 1, wherein the part of the beam main body that enters the coking chamber is reduced by moving the pulverized coal. 4. The coke according to claims 1 to 3, characterized in that a beller beam is used as the beam body, and the pressurization/vibration bottom plate is provided with an opening for discharging pulverized coal. Pressure/vibration filling device for pulverized coal in a furnace.