JPS6211794A - Device for vibrating and consolidating coal to be fed to coke oven - Google Patents

Abstract

PURPOSE:To raise uniformly bulk density of powdered coal both in the vertical direction and width direction of coking chamber, to improve productivity and to obtain coke having high drum index, by applying pressurizing power and vibrating power to the top of leveled powdered coal to be fed. CONSTITUTION:The vibrating member 18 is flexible and rollingly attached to the tip of the main body 8 of a beam having a great number of bottomless divisions made of the two long side plates 9 and the partition plates 10. The weight 23 having eccentric mass in the longer direction of the axial center is rotatably supported on the bearing 33 above the bottom plate 20. The weights 23 are provided with a pressurizing means and a vibrating means rotting reversely each other.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for vibrating and compacting pulverized coal charged into a coke oven carbonization chamber.

(Prior Art) The outline of large-scale industrial coke oven equipment is as shown in Figs. 4 and 5, and the coke oven carbonization chamber A has a size of - for example, a width of 0.4 mm. ~0.5mq Height 5~6rn1 Length from back side to front side 14~15
There are opening/closing doors 1.2 on the front and back sides, respectively, and four to five pulverized coal inlets 3 are provided on the top. In this coke oven carbonization chamber A, combustion chambers B are arranged between them, and 80 to 100 chambers are arranged side by side to form a furnace group, and the upper part of the furnace group is connected to the number corresponding to the pulverized coal charging inlets 3 of the coke oven A. A pulverized coal charging vehicle C having a pulverized coal hopper 4 travels in the width direction of the carbonization chambers A, and is configured to charge pulverized coal into each carbonization chamber A. The pulverized coal is charged into the carbonization chamber A up to about 80% of its height, but the angle of repose of the pulverized coal (36° to 4
0°), an uneven surface 5 having an apex is formed directly below each charging port 3.

On the back side of the coke oven bank, there is disposed a traveling cart F equipped with a scraper D for leveling the uneven surface 5 of the charged pulverized coal and an extruder E for pushing out the produced coke from the carbonization chamber A. ing. That is, the leveler D is placed on the bell at the top of the extruder E and moves forward and backward several times from the back side to the front side of the carbonization chamber A after charging the pulverized coal, thereby evening out the uneven surface 5 of the charged pulverized coal. To explain an example of this, as shown in FIG. 6, it has a length that allows it to enter and exit over the entire length of the carbonization chamber A, and has two side plates 9.9 and 9.9. A beam main body 8 consisting of a partition plate 10 and an IO installed at a required pitch between these side plates, several sets of guide rollers 11 for supporting and guiding the beam main body 8 almost horizontally, and the beam main body 8 It is equipped with a beam driving means 12 for advancing and retracting the beam through a small door lower provided at the upper part of the front door 2 of the carbonization chamber A. The beam driving means 12 includes a driving drum 13 installed on a traveling carriage P, and front and rear fixed guide sheets 14.14.
and an end thread 15 wrapped around these, and the rainbow dress 0--jl-5 is tied to the rear part of the beam body 8 by a clip 16. Therefore, by rotating the driving drum 13 forward and backward, the beam main body 8 can enter and exit the entire length of the carbonization chamber A, and the partition plate 10 scrapes the uneven surface 5 of the powdered coal to perform belling. be.

After producing coke, the extruder E installed at the lower level of the leveler D opens the front and back boundaries 1.2 of the carbonization chamber A, pushes its extrusion ram 17 into the carbonization %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 carbonized 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, using pulverized coal with a grain size of 3 mm and a moisture content of 8% as experimental materials, the relationship between the deposition depth (m) and bulk density (ton/m3) was examined by changing the falling height from the charging port.
As shown in Figure (a), the larger the falling height and the larger the deposition depth, the larger the bulk density. Relationship with penetration depth (m) or charging bulk density (to, n/1♂)
The relationship between DIIS (%) and the cold strength index DIIS (%) is shown in Figures 7(b) and 7(e), respectively, and the greater the bulk density of the charged pulverized coal, the greater the strength of the produced coke. It turns out that it will happen.

Conventionally, pulverized coal has been charged into the coke oven carbonization chamber by falling naturally from the top of the furnace, as described above, and the lower part of the coke oven has a large falling height and a large consolidation effect due to its own weight. The bulk density increases, but 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 will be uneven, and no improvement in productivity can be expected.Especially when weakly coking coal is used, the coke will have a low ring strength, making it difficult to produce 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. As a conventional technique for eliminating such non-uniformity in strength and quality of coke produced due to the low bulk density of the surface layer of coal input into the coke oven carbonization chamber, there is a technique as disclosed in Japanese Patent Publication No. 18434/1983, for example. There is a vibratory filling device characterized in that a vibrating member is provided at the tip of a leveler beam, and the charged coal is pressurized and vibrated by the vibrating member.

(Problems to be Solved by the Invention) A device for pressurizing and vibrating charged coal by providing a vibrating member at the tip of the leveler beam is capable of pressurizing and vibrating the charged coal without impairing coke oven operation (productivity). The shaking operation is required to be completed. To achieve this, it is necessary to obtain a high compaction effect in a short time by increasing the vibration force generated from the vibration source. However, on the other hand, measures such as increasing the single VCm power have caused the problem that the leveler beam becomes a source of abnormal vibrations, especially lateral vibrations, and there is concern that the coke oven wall may collapse. The present invention provides a charged coal vibratory compaction device that can obtain a very high charged coal compaction effect while maintaining the safety of the coke oven wall.

(Means for Solving the Problem) That is, according to the apparatus of the present invention, the bulk of the charged pulverized coal can be increased by applying pressing force and vibration force as physical forces to the leveled upper surface of the charged pulverized coal. The density can be increased uniformly in the top and bottom and width directions of the coking chamber, thereby improving productivity and making it possible to produce coke with high ring strength. A beam body is provided in contact with the upper surface of the pulverized coal that has been leveled after being charged into the carbonization chamber so that it can enter and exit over the entire length of the carbonization chamber, and a plurality of weights each having an eccentric mass on the axis are arranged in series at least at the tip of the beam body. The invention is characterized in that it is provided with pressurizing and vibrating means for causing these weights to rotate in opposite directions. The device of the present invention can also be used as an effective means by providing a pressurizing and vibrating member on the leveler beam itself for charged coal.

(Example) Next, the apparatus of the present invention will be explained in detail with reference to an example. In this embodiment, a leveler beam for charged coal is used as a beam main body, and in FIG. 1, reference numeral 8 denotes two long side plates 9.
9 and partition plates 16 and 10 installed at required pitches in the longitudinal direction, the beam body has a large number of bottom sections. A member 18 is pivotally connected to the beam body 8 by a pivot shaft 19 at the lower rear end thereof.

The vibrating section 18 presses the powdered coal and has a bottom plate 2 that forms a vibrating surface.
0 and a raising arm 22 having a long hole 21, and a bottom plate 20.
A weight 23 having an eccentric mass in the longitudinal direction of its axis is rotatably supported by a bearing 33 on the upper surface of the weight 23 . Further, a spur gear 29 is attached to the shaft of the two weights at an intermediate portion thereof, and the two weights are configured to rotate in opposite directions. A cylinder J-24 for raising and driving the vibrating member 18 is attached to the rear end portion of the beam main body 8, and a cylinder J-24 provided at the tip of a pulling rod 25 that is pulled by the cylinder 24 is used to drive the lifting member 18. It is inserted through the elongated hole 21 of the arm 22. The cylinder 24 is actuated by hydraulic pressure or the like supplied via a solenoid valve 27, and causes the pulling rod 25 to perform a stroke motion to pull up the vibrating member 18 so as to be in line with the beam body 8, or Pulling arm 22
It can be refracted and lowered within the range of the elongated hole 21. Similarly, a variable speed motor 32 is attached to the rear end portion of the beam body 8 to drive a weight 23 having an eccentric mass installed inside the vibrating member 18 at the tip of the beam. Inside, there is a long piece that conveys this,
ffi kanjiku 31 is commonly used. The tip of the elongated drive shaft 31 and the shaft end of the weight 23 having an eccentric mass inside the vibrating member are connected by a ball joint 30, and the vibrating member 18 at the tip can be rotated at any angle with respect to the beam body 8. The driving force of the variable speed electric upper/lower 32 can be transmitted even when the motor is bent.

The vibrating member 18 can be a closed container housing a weight 23 having an eccentric mass, a spur gear 29, and a bearing 33, and the vibrating member 18 shown in FIG. 18 can be stored in this embodiment, or the tip of the beam body 8 may be used as the vibrating member as it is. The coke is released by rotating the weight 23 having an eccentric mass inside the vibrating member 18 via the elongated drive shaft 31 by means of an electrically powered upper plate installed near the rear end of the beam main body 8. The required pressing force and vibration can be applied to the top surface of the leveled pulverized coal in the furnace carbonization chamber A via the bottom plate 20.

As shown in Figure 2, coal has a high consolidation effect in the vibration frequency range of 10 to 20 Hz, and the variable speed electric Tanabata 32 is set at the optimum vibration frequency determined by the moisture and particle size distribution of the coal. The most effective vibration consolidation can be performed.

Further, FIG. 3 shows the state of movement of the weight 23 having two eccentric masses. Electric Tanabata 32 for weight 23a
The rotational motion is transmitted from the weight 23bFi and the spur gear 29 to rotate in the opposite direction. When this weight is rotated, the centrifugal force is generated on a straight line from the axis of the weight shaft toward the center of gravity, but when the two weights 23
Since a123b is rotated in opposite directions, considering the resultant force, even if the two weights rotate 360 degrees, the lateral force will cancel out and only the upward or downward force will remain.

Therefore, the vibrating member 18Fi does not generate any lateral force that may harm the furnace wall of the coke carbonization chamber A, and only applies vertical and directional forces that act on the compaction of the charged coal to the surface layer of the charged coal. It becomes possible to apply pressure and vibration.

In addition, since the beam body 8 is long, its natural frequency is low and it resonates in the excitation frequency band, causing concerns about abnormal vibration of the beam and destruction of the coke oven wall. It is possible to avoid the resonance point by setting , or to suppress the resonance phenomenon by constantly changing the rotation speed.

In such a device, in a coke oven carbonization chamber of 32rrL3, the vibration frequency of the vibrating member is 15H - the pressing force is 560V4f,
When the consolidation work was performed with an excitation time of 3 seconds, the bulk density of the charged coal was increased by Q per 1.0 m3 and 1 ton within a depth of 1 m from the upper layer of the powdered coal in the coking chamber, and the coke strength at the split portion was increased. DI,5 improved by 2.7%.

(Effects of the Invention) As explained above, according to the charged coal vibratory compaction apparatus of the present invention, it is possible to produce coke with high ring strength and substantially uniform coke, which improves coke oven operation. Productivity is improved, and it also serves as a reducing agent with a low pulverization rate during blast furnace operation, making an extremely large contribution to improving blast furnace operation and productivity.

[Brief explanation of drawings]

Fig. 1 is a side view of the main parts of the apparatus according to the present invention, Fig. 2 is a diagram showing the relationship between excitation frequency and coal compaction, and Figs. 3 (a), (b), (
C) is a schematic diagram showing the movement of a weight having two eccentric masses installed in a trap inside the tip vibrating member, Figures 4 and 5 are a side view and a plan view showing an overview of the coke oven equipment, and Figure 6 is a A side view showing an example of the scrubber, FIG. 7 is (a),
(b) and (e) are charts showing the results of a cold top oil test on pulverized coal and produced coke. A... Coke oven carbonization chamber B... Combustion chamber C... Powdered coal charging car D... Leveler E... Extruder? ...Traveling trolley G
... Two 2 guide car H ... Fire engine 1 ... Front door 2 ... Dust world 3 ... Powdered coal population 4 ... Powdered coal hopper 5 ...
Uneven surface 6...Generated gas path 7...Small door opening
8... Beam body 9... Side plate 10.
... Partition plate 11 ... Guide 0-ra 12 ... Beam driving means 13 ... Driving drum 14 ... Fixed guide sheath 15 ... Endless row 16 ... Kritzu 17 ...・Extrusion ram 18...
・Vibration member 19... Pivot shaft 20... Bottom plate
21... Elongated hole 22... Lifting arm 23... Weight having eccentric mass 24... Syringe for lifting drive 25... Traction rod 26... Pin 27... Solenoid valve 28. ...-f save box 29...spur gear 30-...pole joint 31...long drive shaft 32...i! #IJJ7-ta33...Bearing Fig. 7 (a) (b) DI, s (%)

Claims (1)

[Scope of Claims] 1. A beam body that is 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 at least a tip of the beam body that 1. A vibratory compaction device for coal in a coke oven, characterized in that a plurality of weights each having an eccentric mass are arranged in series, and the weights are pressurized and vibrated to rotate in opposite directions. 2. The apparatus for vibratory consolidation of coal in a coke oven according to claim 1, characterized in that the rotational speed of the weight is variable. 3. A leveler beam is used as the beam main body, and a frame-shaped section is provided at the tip of the leveler beam so that it can be bent and pivoted, and the pressurizing and vibrating member is provided within the frame-shaped section. The apparatus for vibratory consolidation of coal in a coke oven according to claim 1.