JPS5918434B2 - Pulverized coal vibration filling device in 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 by using a vibrating member equipped with an air vibrator, thereby increasing the level of pulverized coal charged. The present invention relates to a vibratory filling device for charged pulverized coal in a coke oven carbonization chamber that increases bulk density.

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 the front cloth from the back side to 14 to 15 m. The front and back sides are provided with opening/closing doors 1 and 2, 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 chambers to 100 chambers are arranged side by side to form 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. It runs in the width direction and charges powdered coal into each carbonization chamber A.

Powdered coal is fed and charged into the carbonization chamber A up to about 80 degrees of its height, and an uneven surface 5 with a peak is formed directly below each charging port 3 according to the angle of repose of the powdered coal (36° to 40°). do.

On the back side of the coke oven group, there is disposed a traveling trolley F equipped with a leveler D for leveling the uneven surface 5 of the charged pulverized coal and an extruder E for pushing the produced coke out of the carbonization chamber A. .

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 leg consisting of partition plates 10, 10... attached at a required pitch between these side plates, several sets of guide rollers 11 for supporting and guiding the beam main body almost horizontally, and the beam It is equipped with a beam drive means opening for moving the main body 1 forward and backward through a small door lower provided at the upper part of the back door 2 of the carbonization chamber A.

The beam 1 drive means opening consists of a drive drum 13 installed on the 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 8 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 a lower level of the leveler D opens the front and rear doors 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. It is pushed out and discharged to the fire extinguisher H via the coke guide car G on the side.

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.

That is, powdered coal particle size is 3mm under 85%, moisture content is 8.
Using the pulverized coal as an experimental material, the falling height from the charging port was varied and the relationship between the piled-up depth () and the bulk density (ton/m3) was found, as shown in Figure 4a, the falling height was large. The larger the deposition depth is, the larger the bulk density becomes.
It can be seen that the greater the bulk density of the charged pulverized coal, the stronger the produced coke becomes.

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 it is 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 in blast furnace operation such as a decrease in productivity.

The present invention advantageously solves the above-mentioned problems by:
To provide a vibration filling device that applies vibration while applying a predetermined load to the leveled upper surface of charged pulverized coal so that the bulk density of the pulverized coal charged in a carbonization chamber is almost uniform from the lower layer to the upper layer. It is something.

That is, according to the device of the present invention, as a physical force,
By applying gravity and vibration to the leveled upper surface of the charged pulverized coal, the bulk density of the pulverized coal can be increased uniformly in the top, bottom, and width directions of the coking chamber, thereby improving productivity and ring strength. It is possible to produce coke with a high coke temperature, and its main structure consists of a beam that is installed along the entire length of the coke oven in contact with the top surface of the pulverized coal that has been leveled after being charged into the coke oven carbonization chamber so that it can move in and out of the coke oven. a main body, a vibrating member which is pivotably attached to at least the tip of the beam body and has a pressurizing, vibrating surface and a raising arm; and an air vibrator mounted on the vibrating member. and a lifting drive means attached to the rear end portion of the beam main body and operatively connected to the lifting arm of the vibrating member via a traction member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the leveler beam itself is used as the beam body of the pulverized coal vibration filling apparatus of the present invention will be described in detail below with reference to the drawings.

In FIGS. 5 a, b and 6 a, b, 8 includes two long side plates 9, 9, and partition plates 10, 10... attached at a required pitch in the longitudinal direction. A beam body is constituted by a large number of bottom-cut sections, and an excitation member 18 is pivoted to the beam body L by a pivot shaft 19 at the lower part of the rear end thereof, and an oscillating member 18 is attached to the tip of the beam body L so as to be able to bend and rise freely. ing.

The vibrating member 18 has a bottom plate 20 that serves as a pressurizing and vibrating surface for powdered coal, and a lifting arm 22 having a long hole 21.
An air exciter 23 is attached to the top surface of the 0.

A cylinder 24 for raising and driving the vibration member 18 is attached to the rear end portion of the beam body 18, and the cylinder 24
A pin 26 provided at the tip of a pulling rod 25 or the like that is pulled is inserted into the elongated hole 21 of the lifting arm 22.

This traction rod 25 can also serve as an air pipe for supplying pressurized air to the air exciter 23, and a wire rope may be used instead of the rod since it only needs to have a pulling function as a traction member. .

The cylinder 24 is actuated by hydraulic pressure or the like supplied via an electromagnetic valve 27, and by stroking the pulling rod 25, it pulls up the vibrating member 18 so as to be in line with the beam body 8, or pulls up the pulling arm. 22 can be bent and lowered within the range of the elongated hole 21.

The air vibrator 23 includes an air hose 3 that is wound or unwound by a winding drum 29 together with a winding cable 28.
Pressure is supplied via 0 and air pipe 3σ, etc.
Vibrations can be applied to the vibrating member 18.

The vibrating member 18 can be a closed container housing the air vibrator 23, and the one shown in FIG. 5 uses the tip of the beam body l as the vibrating member, and the one shown in FIG. The one shown in FIG.
8 can be stored.

When the vibrating member 18 is released from being pulled by the towing rod 25, the entire weight including the air vibrator 23 applies a required pressing force to the top surface of the leveled pulverized coal in the coke oven carbonization chamber A via the bottom plate 20. In addition, by vibrating the air vibrator 23, the required vibration can be applied.

Note that the exhaust air from the air vibrator 23 is used to cool the vibrating member 18.

To explain the operation of the pulverized coal vibratory filling device having the configuration described above, the pulverized coal charged into the coke oven carbonization chamber A has an uneven surface 5 whose upper surface has a conical top directly below each charging port 3. , so we need to level this first.

During this leveling, the vibrating member 18 is pulled up so as to be in line with the beam main body 8, and the beam driving means 12 consisting of the driving drum 13, endless rope 15, etc. shown in FIG. The main body side is moved into and out of the carbonization chamber A over the entire length.

The convex portions on the upper surface of the pulverized coal in the beam body are broken down and leveled by the partition plate 10, thereby leveling the upper surface of the pulverized coal.

After leveling two or three times, the vibrating member 18 is released and bent down onto the top surface of the leveled pulverized coal to apply a pressing force due to the load, and the air vibrator 23 is activated to excite it. The beam main body 8 is moved out of the carbonization chamber A while applying a vibration force to the upper surface of the powdered coal by the member 18.

The filling pressure, frequency and acceleration of the vibrating member 18 including the air vibrator 23, the moving speed of the beam body 8, etc.
It goes without saying that the bulk density of the upper layer of the pulverized coal that has been leveled after being charged into the carbonization chamber A is approximately equal to that of the bottom layer.

In addition, the apparatus shown in FIGS. 5a and 5b and 6a and 6b,
Although this is an example in which the leveler beam is also used as the beam body 8 and one vibrating member 18 is provided at its tip, the beam body 8 may be provided separately from the leveler beam, and FIG. As shown in b, two or more vibrating members 18, 18 can be disposed on the beam body 8 to shorten the vibrating filling operation time.

To explain an actual example of the vibratory filling operation of pulverized coal using the apparatus of the present invention, in a 32 m3 coke oven carbonization chamber, the filling surface pressure of the vibrating member was 1.58 x 10-2 kg/cyyf frequency 3600 VPM, and the vibration acceleration was 1. 5m/5ec
2. When the work was carried out with an excitation time of 3 QSeC, the bulk density of the charged pulverized coal was increased by 0-1 ton per 1.0 m' within 1 depth from the upper layer of pulverized coal in the coking chamber, and the coke The powder rate decreased by 2.88%.

As explained above, according to the pulverized coal 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. Furthermore, it serves as a reducing agent with a low pulverization rate during blast furnace operation, and greatly contributes to improving blast furnace operation and productivity.

[Brief explanation of the drawing]

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. Diagrams showing the test results, FIGS. 5a and 5b are side views of the main parts of the first embodiment of the device according to the present invention, and FIGS. 6a and 6b are the second
FIGS. 7a and 7b are side views of the main parts of the apparatus according to the embodiment. FIGS. 7a and 7b are schematic side views of an embodiment using two vibrating members. 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... Gas path, 7...
...Small door opening, 8...Beam body, 9...
...Side plate, 10...Partition plate, 11...
・Guide roller, 12...Beam driving means,
13... Drive drum, 14... Fixed guide sheave, 15... Endless rope, 16
...Clip, 17...Extrusion ram,
18... Vibrating member, 19... Pivoting shaft,
20... Bottom plate, 21... Long hole, 22.
...Raising arm, 23...Air exciter, 2
4...Lifting drive cylinder, 25...
・Tow rod, 26...Pin, 27...
・Solenoid valve, 28... Winding cable.

Claims (1)

[Claims] 1. A beam body provided in contact with the upper surface of the pulverized coal that has been leveled after being charged into the coke oven carbonization chamber so as to be able to enter and exit over the entire length of the carbonization chamber, and a beam body provided at least at the tip of the beam body with respect to the beam body an excitation member that is pivotably mounted to be bendable and has a pressurizing surface, an excitation surface, and a lifting arm; an air exciter mounted on the excitation member; and an air exciter mounted on the rear end portion of the beam body. 1. A vibrating and filling device for pulverized coal in a coke oven, comprising a lifting drive means operatively connected to a lifting arm of the vibrating member via a traction member. 2. The pulverized coal vibratory filling device in a coke oven according to claim 1, wherein a leveler beam is used as the beam main body, and a tip portion of the leveler beam is used as a vibrating member. 3. Pulverized coal in a coke oven according to claim 1, wherein a leveler beam is used as the beam main body, and the vibrating member is provided so as to be housed within a frame-shaped section of the leveler beam. Vibratory filling device.