JPH05105880A - Coke-receiving truck for vertical coke oven - Google Patents

Abstract

PURPOSE:To smooth the discharge of coke from a coke oven and mitigate the drop impact to thereby stabilize the operation by using a given vertical coke oven provided with a coke-receiving truck constituted of a truck, a coke receiver tank installed thereon, and a specified coke-receiving surface. CONSTITUTION:A coke-receiving truck 5 for a vertical coke oven having carbonization chambers 2 provided with coal charge ports on the top and coke discharge ports on the bottom, wherein the truck 5 is constituted of a truck 10, a coke receiver tank 6 installed thereon, and a coke-receiving surface 7 which is attached to the tank 6 and has a concave structure extending from the top at one end or both ends in the longitudinal direction of the tank 6 to the bottom thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to smoothly receive coke discharged from the discharge port at the bottom of the carbonization chamber of a vertical coke oven, or to prevent dust generation when the coke is received. The present invention relates to a cradle for a vertical coke oven.

[0002]

2. Description of the Related Art As a receiving carriage for a vertical coke oven having a coking chamber provided with a coke discharge port at the bottom, a carriage having a box-shaped receiving tank is generally used. This box type trolley moves to the position directly below the discharge kiln when the coke is discharged from the carbonization chamber (kiln) after the carbonization is completed, and the furnace lid is opened and the coke that spontaneously falls due to its own weight enters the receiving tank. After receiving and discharging all the coke in the kiln, move to the fire extinguisher tower or fire extinguisher to extinguish the coke.

[0003] As a conventional technique relating to a trolley, for example, in order to prevent the received coke from accumulating at a specific portion in the tank, a red-hot coke in which a coke bucket is rotated to receive the coke is rotated. The receiving device is special public Sho 63-
In order to reduce the capacity of the receiving tank and to prevent dust generation, the vane plate is rotated to distribute the coke, and the top surface of the coke in the receiving tank is evened out. Japanese Patent Publication No. Sho 61 is a device for sorting the body of a coke car that holds the plate in a horizontal position and sealing the body tank, and a dust generation prevention device.
-243890 is disclosed. However, these are all related to the receiving carriage for the horizontal chamber furnace type coke oven, and cannot be directly applied to the receiving carriage for the vertical type coke oven.

In the vertical type coke oven, since the discharge of coke is performed by the weight of the coke, there is an advantage that an extruder and a guide wheel which are indispensable in the horizontal chamber type coke oven are unnecessary. However, because the discharge speed of coke cannot be controlled and the discharge speed is high, it is difficult to receive the coke while the trolley is being moved or rotated. While still at
All of the falling coke will be accepted in a short time. Therefore, the receiving surface of the receiving carriage receives a large impact due to the fall of the coke, and therefore it is necessary to have a strong structure that can sufficiently withstand the impact.

Further, since the receiving carriage receives the body in a stationary state, the height of the coke in the receiving tank after receiving the body is mainly determined by the angle of repose of the coke block (see FIG. 6). But,
When the speed of the coke mass rolling down the slope formed by the angle of repose decreases due to the influence of its surface condition and the shape of the coke mass, and it no longer balances with the discharge speed of the coke, it has fallen in the carbonization chamber. The coke temporarily stops and some of the coke remains in the carbonization chamber. In such a state, the coke is not discharged smoothly, and in an extreme case, the coke is suspended in the carbonization chamber, and the entire amount of the coke cannot be discharged.

For this reason, in the receiving tank, the angle of repose of the discharged coke lumps is taken into consideration, and further, the speed of the coke lumps rolling down the slope formed by this angle of repose and the discharge speed of the coke become unbalanced. In consideration of the above, it is necessary to make a structure that secures a sufficient height. The height of the receiving tank affects the height of the receiving carriage as a whole, and further affects the structure of the coke oven body. Since the height of the space below the carbonization chamber and the combustion chamber of the coke oven, that is, the moving space of the dolly carriage must be equal to or higher than the height of the dolly carriage, the height of the carbonization chamber is about 4 m. In a vertical coke oven, the height of the lower space is generally about 3 m. This height is comparable to the height of the coke in the carbonization chamber, and when increasing the size of a vertical type coke oven, if the scale is increased as it is, the height of the oven becomes high, which causes problems such as an increase in construction costs. Become.

[0007]

DISCLOSURE OF THE INVENTION The present invention smoothes the discharge of coke in a vertical coke oven, prevents the suspension of the coke in the carbonization chamber, stabilizes the furnace operation, and suppresses the discharge rate of coke. It is possible to reduce the impact of falling on the receiving carriage and reduce the height of the coke in the receiving tank to reduce the weight of the receiving carriage and reduce the size of the furnace body structure of the entire coke oven. It is an object of the present invention to provide a dolly truck and, further, to provide a dolly truck that can prevent dust generation during and after the body laying.

[0008]

Means for Solving the Problems The inventors of the present invention have made extensive studies on the dischargeability of coke and the state of coke after discharge using a vertical test coke oven, and as a result, have obtained the following findings a and b. .. That is, a. If the receiving surface of the truck that receives the coke discharged from the bottom of the discharge kiln has a curved structure, the falling coke does not stay directly below the carbonization chamber and moves horizontally, so that the coke is discharged smoothly.

B. The structure of the receiving surface makes it possible to reduce the opening of the receiving tank at the time of receiving the body. Also, by closing the opening after the body is closed and closing the receiving tank, It is possible to prevent dust generation after receiving the body.

The invention described in the specification of the present application was made based on the above findings, and the gist thereof is as follows.
The dolly truck of the invention and the second invention.

1st invention (see FIG. 2): A trolley for a vertical coke oven having a carbonization chamber having a coal charging port at the top and a coke discharge port at the bottom, which is a trolley 10 And a receiving tank 6 provided on the receiving tank 6 and attached to the receiving tank 6 from one end or both ends in the longitudinal direction of the receiving tank 6 toward the bottom of the receiving tank 6. And a receiving body 7 having a concave curved surface structure for a vertical coke oven.

Second invention (see FIG. 3): A vertical lid according to the first invention, characterized in that a fixed lid 13 having an opening provided with a lid 14 which can be opened and closed is attached to the upper surface of the receiving tank. Trolley for a standard coke oven.

[0013]

The structure and operation of the receiving carriage of the first and second inventions will be described in detail below.

FIG. 1 is a partial vertical elevational view illustrating a state of receiving a body by a receiving carriage according to the first aspect of the present invention. FIG. 1 (a) is a diagram showing a state during receiving a body, and FIG. It is a figure which shows the latter situation. In this figure, the receiving carriage 5 is composed of a carriage 10, a receiving tank 6 provided thereon, and a receiving surface 7 attached to the receiving tank 6, and the receiving surface 7 is It has a concave curved surface structure from the uppermost part of one end portion (right side in the drawing) of the body tank 6 toward the bottom portion of the body tank 6. 2 is an enlarged view of the receiving carriage 5 shown in FIG. 1, and is a partially vertical elevation view illustrating the receiving carriage of the first invention.

In order to receive the body with this cradle carriage 5, the cradle carriage 5 is moved to the position of the dry distillation completion kiln 8 and the skeleton surface 7 is positioned so as to be directly under the discharge port of the kiln 8. After that, the furnace lid 4 is opened to start discharging coke. As shown in the drawing, the coke 1 vertically falling from the discharge port of the carbonization chamber 2
Turns in the horizontal direction 11 along the curved surface of the body surface 7 and moves sequentially, and further, it is continuously pushed by the vertically falling coke and slides horizontally. This movement continues until all the coke in the kiln 8 is discharged. In this way, when the vertically falling coke changes its direction in the horizontal direction, the falling speed decreases, so that the discharge speed of the coke is suppressed as compared with the conventional case where only the vertically falling, and the coke The impact received by the receiving tank 6 due to the fall is mitigated. As a result, it is possible to reduce the weight of the receiving trolley without requiring a strong structure as required in the conventional receiving tub.

FIG. 6 is a partial vertical elevational view showing the situation after being sunk by a conventional sickle truck. In this case, the coke 12 after the sickle has a mountain with a repose angle θ. Since the coke is formed, the height h _O of the coke in the receiving tank 6 becomes high, and the furnace height inevitably becomes high. On the other hand, in the cradle truck 5 of the present invention, since the coke does not stay directly below the carbonization chamber, as shown in FIG. 1 (b), the coke height h _N in the tank 6 after the burial is not so great. It does not become high, and the receiving tank can be downsized.

As described above, by using the receiving carriage of the first aspect of the invention, the receiving carriage 5 can be made lighter and smaller, and
Since the height h _{L of the} lower part of the furnace body (see Fig. 1 (a)) can be made lower than in the case of using a conventional trolley, it is possible to reduce the height of the entire vertical coke oven. Become.

Further, since the vertically falling coke moves while sliding horizontally, it is not necessary to move the dolly carriage 5 during the cradle, and the dolly can be received in a stationary state.

FIG. 3 is a vertical sectional elevational view showing an example of the receiving carriage of the second invention, and FIG. 4 is a diagram showing the details of the main parts of FIG.
Part (a) of the figure is a vertical sectional elevation view, and part (b) of the figure is a plan view. In these drawings, the receiving carriage is a carriage 10, a receiving tank 6 provided thereon, and one end portion of the receiving tank 6 attached to the receiving tank 6 in the longitudinal direction (in the drawings). The receiving surface 7 has a concave curved surface structure from the uppermost part (on the right side) toward the bottom of the tank 6, and the receiving tank 6 has a lid that can be opened and closed above the receiving surface 7. A fixed lid 13 having an opening 15 with 14 is attached. The size of the opening 15 may be the same as or slightly larger than the coke discharge port.

In order to receive a body with this dolly carriage, the same procedure as in the case of using the dolly carriage of the first invention may be performed. After the total amount of coke in the kiln has been discharged into the receiving tank 6, the opening / closing lid
At 14, the opening 15 of the fixed lid 13 is covered. The size of the opening 15 is about the same as that of the coke discharge port, so there is little dust generation in the body, and since the opening 15 is relatively small, it is easy to install the opening / closing lid 14, and the lid after the body is closed. Since the receiving tank can be easily made into a closed structure, dust generation after receiving can also be prevented.

FIG. 5 is a view showing a main part (opening / closing lid part) of another example of the receiving carriage of the second invention, FIG. 5 (a) is an elevation view and FIG. 5 (b) is a plan view. From the viewpoint of space saving, the slide type shown in this figure is preferable.

The above-mentioned first and second inventions are not limited to the discharge of the lump coke, but can be applied to the discharge of the molded coke.

Further, the shape, curvature, material, etc. of the curved surface of the sickle surface are not particularly limited, and in determining the specifications of these, the coke can be discharged smoothly and durability can be maintained. It may be determined in consideration of the influence of the size of the furnace, the raw material, the shape of the coke and the particle size of the coke due to the conditions of carbonization.

The position of the receiving surface 7 in the receiving tank 6 is not particularly limited either, but considering the treatment in the next step, one end or both ends in the longitudinal direction of the receiving tank are considered. It is preferable to arrange it in a part. It can be said that it is more desirable to provide them at both ends because the degree of freedom in deciding the position of the receiving carriage is increased.

[0025]

[Embodiment 1] The coke after completion of carbonization is received by the receiving carriage of the first invention shown in FIG. 1 or 2, and the dischargeability of coke, the height of the coke in the receiving tank after discharge, and the coke The quality (average particle size and ratio of powder passing through a 25 mm sieve) was investigated.

The receiving tank 6 has a tank length of 3.0 m and a tank width of 1.2 m.
m, the tank height is 0.65 m, and the receiving surface 7 is provided on one end surface of the receiving tank 6 as shown in the figure. The vertical test coke oven used had a carbonization chamber with a furnace length of 1 m, a furnace width of 450 mm, and a furnace height of 2.5 m. Tests were performed using coal with the properties shown in Table 1 under different carbonization conditions. Carried out. In addition, for comparison, the conventional receiving carriage shown in FIG. 6 (the tank length is
The same investigation was carried out for the case of receiving the body using 2.0 m, tank width 1.2 m, and tank height 1.2 m).

[0027]

[Table 1]

Table 2 shows the dry distillation conditions and the test results.

[0029]

[Table 2]

As shown in Table 2, even in No. 3 of Comparative Example 1 using the conventional trolley, when the carbonization temperature is increased and the carbonization time is lengthened to make the carbonization conditions severe, the coke discharge is good. However, when compared under almost the same dry distillation conditions, in No. 1 and No. 2 of Comparative Example 1, the discharge of coke was intermittent and a part of hanging was generated, whereas in Example 1 N
Both o.1 and No. 2 had good discharge properties.

In addition, the height of the coke in the receiving tank after discharge was about 1 m in Comparative Example 1, which was a mountain with a repose angle of about 40 °, whereas in Example 1 In No. 1, since no peaks were formed, it was as low as 50 to 60 cm, which was about half the height when using a conventional receiving carriage.

Further, regarding the quality of the coke after receiving the body, the average particle size is larger and the powder ratio is lower in Example 1 than in Comparative Example 1, and the impact when the coke falls is mitigated. Indicates that the coke lumps cracked and became less pulverized.

[0033]

[Embodiment 2] The coke after the completion of carbonization was received by the receiving carriage of the second invention shown in FIGS. 3 and 4, and the amount of dust scattering at the time of discharging the coke was investigated. The amount of dust is measured by measuring the horizontal distance 3 from the center of each end face of the coke outlet in the north, south, east, and west directions.
m, and the vertical distance was 1 m below.

The receiving tank 6 has the same size as that used in Example 1, and the opening 15 attached to the upper surface has a width of 550 m.
m, length 1200 mm. The same vertical test coke oven as in Example 1 was used, and the coal used was one shown in Table 1 above. In addition, for comparison, a fixed lid on the top of the receiving tank,
The same investigation was carried out for the case where a dolly body with the open / close lid removed was used to receive the body.

Table 3 shows the dry distillation conditions and the test results.

[0036]

[Table 3]

As shown in Table 3, in Example 2 using the receiving carriage of the second invention, the amount of dust was much smaller than in Comparative Example 2 without the lid, and a large dust-preventing effect was obtained. ..

Further, the same investigation was conducted on the cradle truck having the opening / closing lid shown in FIG. 5, and the same good results as above were shown.

[0039]

When discharging the coke from the vertical type coke oven, the use of the receiving carriage of the invention described in the present specification,
The coke can be discharged smoothly, the impact caused by the falling of the coke can be mitigated, and the height of the coke in the receiving tank after receiving the coke can be reduced, thereby stabilizing the operation. In addition, it is possible to reduce the equipment cost of the trolley and the coke oven and improve the quality of the coke. Furthermore, by attaching a lid having an opening provided with a lid that can be opened and closed to the upper surface of the receiving body tank, it is possible to prevent dust generation during and after receiving the body and improve the working environment.

[Brief description of drawings]

FIG. 1 is a partial vertical elevational view showing an example of a state of being received by a receiving carriage of a first invention described in the present specification, in which (a) is a diagram showing a state during receiving, (b) is a diagram [Fig. 3] is a diagram showing a situation after being sunk.

FIG. 2 is a partial vertical sectional elevational view showing an example of the receiving carriage of the first invention described in the present specification.

FIG. 3 is a partial vertical sectional elevational view illustrating a receiving carriage according to a second invention described in the present specification.

4A and 4B are diagrams showing details of a main part of FIG. 3, in which FIG. 4A is a vertical sectional elevational view and FIG. 4B is a plan view.

5A and 5B are diagrams showing a main part of another example of the receiving carriage according to the second invention described in the specification of the present application, in which FIG. 5A is an elevation view and FIG. 5B is a plan view.

FIG. 6 is a partial vertical elevation view illustrating a situation after being received by a conventional receiving carriage.

Claims (2)

[Claims] 1. A cradle for a vertical coke oven having a carbonization chamber having a coal charging port at the top and a coke discharge port at the bottom, the trolley being provided on the trolley. It has a receiving tank and a receiving surface that is attached to the receiving tank and has a concave curved surface structure from one end or both ends in the longitudinal direction of the receiving tank to the bottom of the receiving tank. A cradle truck for a vertical coke oven, which is characterized in that 2. A cradle for a vertical coke oven according to claim 1, wherein a fixed lid having an opening provided with a lid that can be opened and closed is attached to an upper surface of the basin tank.