JPH03796A - Technique for charging raw material in chamber oven - Google Patents

Abstract

PURPOSE:To freely control the bulk density (distribution) of raw material charge in both vertical and widthwise directions in a carbonization chamber by a technique wherein a specified means is employed to cause raw material to fall with an accelerated velocity for charging it into a carbonization chamber through the charge holes of a chamber oven. CONSTITUTION:A technique for charging raw material 8 into a carbonization chamber 5 through the charge holes 6 of a chamber oven, wherein a leveler 1 having rotating blades 2 and attached to a pushing machine is inserted through a leveling hole into the carbonization chamber 5 and the raw material 8 falling from the charge holes 6 is received on the rotating blades 2 driven by a motor 4 so that it is caused to fall with an accelerated velocity and charged into the carbonization chamber 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a coke oven of an indoor furnace type for improving and making uniform the bulk density in the furnace of raw materials charged from a coal loading car to a coking chamber. A method of charging raw materials in a coke oven.

Charging of raw materials into conventional technical chamber type coke ovens is generally carried out using a coal loading car. This coal loading car is usually equipped with 4 to 5 hoppers, and the coal stored in each hopper is dropped into the carbonization chamber from the charging port installed in the furnace ceiling via a table feeder at the bottom of the hopper. entered.

According to the above charging method, the coal is charged into the carbonization chamber with a so-called natural fall with an initial velocity of zero.

As a result, the coal filling density tends to be high in the lower part of the carbonization chamber, and the packing density tends to be lower in the upper part.

On the other hand, in a room furnace type coke oven, increasing the bulk density of the coal charged into the coking chamber is achieved by shortening the distance between particles during the process in which the coal softens and melts due to heating and turns into coke. It is an essential condition for making coke.

Conventionally, by increasing the bulk density of coal throughout the carbonization chamber,
The briquette blending method, preheated coal method, and stamping method are known as methods for significantly improving the quality of product coke, and each has been implemented on an industrial scale with some success. However, both methods have the drawback of rising equipment costs and operating costs.

In addition, in order to selectively increase the bulk density in the upper part of the carbonization chamber, there is a method in which a leveler attached to an extruder is inserted and moved into the carbonization chamber for the purpose of leveling the coal at the end of charging, or in a molded coal blending method. A method is known in which a large amount of briquette coal having a high bulk density is added to the upper part of the carbonization chamber. However, each method has a limited effect on increasing the bulk density of the upper part of the carbonization chamber, and has not yet reached the point where the objective has been fully achieved.

Another method is to accelerate charging using a belt pair in a part of the hopper of the coal loading car. However, this method requires significant modification of the coal loading car or coal tower, making it difficult to apply to existing equipment.

Problems to be Solved by the Invention As mentioned above, a wide variety of methods for increasing the bulk density of coal charged into a carbonization chamber have been proposed and put into practical use. However, all of these methods have the disadvantage that either sufficient effects cannot be obtained, or even if sufficient effects are obtained, equipment costs and operating costs are high.

The purpose of this invention is to solve the above-mentioned drawbacks, and at the same time improve the average bulk density of the charged coal charged into the carbonization chamber, and at the same time, freely control the bulk density distribution in the furnace height direction and furnace width direction. A coke oven raw material charging method is provided.

Means for Solving the Problems In order to achieve the above object, the method for charging raw materials in a chamber-type coke oven of the present invention is such that when the raw materials are dropped and charged from the charging port into the carbonization chamber, the rotating A leveler with blades is inserted into the carbonization chamber through the leveling port, and the raw material falling from the charging port is caught by rotating blades driven by a motor and accelerated to fall, increasing the bulk density of the charged material and ensuring uniform loading. It is about entering.

Further, the rotational speed of the rotary blade can be changed in accordance with the variation in the bulk density distribution in the furnace height direction depending on the charging degree of coal in the coking chamber, thereby controlling the bulk density and the bulk density distribution.

The leveler attached to the extruder has a rotating shaft driven by a motor between its side plates, and a plurality of rotating blades arranged radially on the rotating shaft at positions corresponding to each charging port. configured.

The raw material falling from the charging port is caught by the rotating blades and accelerated to fall, resulting in faster charging compared to natural falling, which increases the collision energy, and also increases the compaction effect due to the piled own weight, reducing the bulk density of the charged raw material. increases.

Furthermore, by arbitrarily changing the rotational speed of the rotating blades provided in the leveler, the bulk density in the furnace height direction can be controlled.

In general, due to high-speed charging, the flow velocity of the raw material that has fallen directly below the charging port in the furnace length direction increases, so the bulk density between adjacent charging ports and on the furnace lid side increases, and the bulk density is uniform in the furnace length direction. A bulk density distribution is obtained.

Example Example 1 An embodiment of this invention will be explained based on FIGS. 1 and 2.

FIG. 1 shows that a leveler (1) having a rotating blade (2) is inserted into a carbonization chamber (5) through a leveling port according to the present invention, and a charging port (2) with a rotating blade (2) provided on the furnace ceiling is inserted into a carbonization chamber (5) through a leveling port. 6), and Figure 2 shows the charging port (6) in Figure 1.
) is a longitudinal cross-sectional side view at the center.

The leveler (1) has left and right side plates (1-1) (1-2
), a rotating shaft (3) with a length spanning the entire length of the leveler is parallel to the side plates, and is pivoted through the partition plate (1-3) that connects the side plates. Corresponding to (6), a rotating blade (2) is provided in which a plurality of blades (four blades are shown in the drawing) are arranged radially, and the base end of the rotating shaft (3) is connected to the drive shaft of the motor (4). A rotary vane mechanism connected to the rotary vane mechanism is provided. Note that the rotational speed of the rotary blade (2) can be arbitrarily controlled via a reduction gear attached to the motor (4).

Now, stop the extruder (not shown) facing the window,
Insert the leveler (1) into the carbonization chamber (5) through the leveling port,
As shown in Figure 1, there is a rotating blade (
2) Position. Then, while operating the motor (4) to rotate the rotary vane (2), the gate of the hopper (7) of the coal loading car set in the charging port (6) is opened, and the coking coal stored in each hopper ( 8) Drop.

Then, most of the coking coal is received by the blade pocket (9), accelerated by the rotation of the blade, and falls.

Due to this accelerated fall, the collision energy of the coking coal increases, and the bulk density of the charged coal increases due to the addition of the consolidation effect due to its own weight. Then, as the coking coal accelerates and falls, the flow velocity in the furnace length direction increases, and the bulk density between the joint inlets and on the furnace lid side increases, resulting in a uniform bulk density distribution in the furnace length direction.

In addition, the bulk density in the furnace height direction is generally higher at the bottom than at the top, so the rotation speed of the rotating blades should be lowered at the initial stage of charging.
As the end of charging approaches, the rotation speed is increased to control the bulk density in the furnace height direction to be uniform.

Example 2 At the end of the coke oven bank, a large iron furnace bulk density measuring device (length 7920 mm, height 7210 mm, width 4
50 mm, volume 25.7 m'), insert the leveler (1) having the rotary vane (2) shown in Fig. 1 through the leveling port, and while rotating the rotary vane (2),
Calculated falling speed at the leveler position using the original hopper 8
1/S (Example work) and 10 m/s (Example m>r
Accelerated loading.

As shown in Fig. 3, a total of 3 rows in the furnace length direction (furnace lid side, right below the charging port, middle of the charging port) and 6 rows in the furnace height direction (a-f) provided on the side wall of the bulk density measuring device. The bulk density of each sample was measured from 18 sampling holes (10).

For comparison, coking coal was naturally fallen from a hopper (at a speed of 5
m/s), and the bulk density was measured in the same manner as above.

The results of the above bulk density measurement are shown in FIG. 4 by measurement position.

That is, FIG. 4A shows the measured value on the furnace lid side, FIG. 4S shows the measured value right below the charging port, and FIG. 4C shows the measured value in the middle of the charging port. From these results, it can be seen that in the case of the present invention, the bulk density is improved at all positions, and the difference in bulk density in the furnace height direction is reduced, compared to the conventional case of free fall.

Table 1 shows a comparison of the above measurement results as average values in the furnace height direction.

Table 1 (margin below) From the above results, it can be seen that by carrying out the present invention, if coking coal is charged at an accelerated rate, the bulk density will be improved compared to the conventional charging by natural fall, and both in the furnace height direction and in the furnace length direction. It can be seen that the difference in bulk density is reduced and the bulk density can be made uniform.

Furthermore, in the practice of the present invention, it can be seen that by increasing the rotational speed of the rotary blade, the bulk density increases and the difference in bulk density decreases in both the furnace height direction and the furnace length direction.

Note that the charging density of the charged coal and the coke strength have the relationship shown in FIG. 5. Therefore, it is presumed that if the bulk density is improved by implementing the present invention, the coke strength will naturally be improved and the strength variation will be reduced.

Effects of the Invention This invention, when charging raw materials into the carbonization chamber from the charging port of a room furnace type coke oven, charges a leveler having rotating blades through the leveling port and drops the raw materials while rotating the blades. By doing so, raw materials can be charged at an accelerated rate. As a result, the bulk density of the raw material introduced into the furnace can be improved and the bulk density distribution can be controlled. In addition, coke strength can also be improved as the bulk density is improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the main parts of a coke oven carbonization chamber when carrying out the present invention, FIG. 2 is an explanatory diagram showing an enlarged main part of the side surface taken longitudinally on the center line of the charging port in FIG. 1, Figure 3 is an explanatory diagram showing the main parts of the actual reactor large bulk density measuring device, and Figure 4 is a graph showing the relationship between the bulk density and height position measured at each sampling hole by the actual reactor large bulk density measuring device. Figure a shows the measurement on the furnace lid side, Figure B shows the measurement right below the charging port, Figure 0 shows the measurement result in the middle of the charging port, and Figure 5 shows the relationship between the charging density of coking coal and coke strength. It is a graph showing the relationship between. 1... Leveler 1-1.1-2... Side plate 2... Rotating blade 3... Rotating shaft 5... Carbonization chamber 7... Hopper 9... Vane pocket

Claims (1)

[Scope of Claims] 1. When charging raw materials into the carbonization chamber from the charging port of a chamber furnace type coke oven, a leveler with rotating blades attached to an extruder is inserted into the carbonization chamber through the leveling port, and the material is charged into the carbonization chamber from the charging port. A method for charging raw materials in a room furnace type coke oven, characterized in that the bulk density and bulk density distribution of the charged raw materials are controlled by receiving the raw materials falling from the coke oven by rotating blades driven by a motor and causing them to fall at an accelerated rate. 2. The chamber according to claim 1, wherein the rotational speed of the blade is changed to control the bulk density and the bulk density distribution in accordance with the variation in the bulk density distribution in the furnace height direction due to the charging degree of coal in the carbonization chamber. A method of charging raw materials in a furnace-type coke oven. 3 The leveler attached to the extruder is equipped with a rotating shaft driven by a motor between its side plates, and a plurality of rotating blades arranged radially on the rotating shaft at positions corresponding to each charging port. 2. The method for charging raw materials in a room furnace type coke oven according to claim 1, which uses a leveler having a leveler.