JPH03220290A - Structure of coke oven lid part - Google Patents

Abstract

PURPOSE:To improve the productivity of a coke oven and to stabilize the quality of coke by ensuring a sufficient length of a gap between an oven wall and a coking plate and narrowing the coking plate towards a louver formed on an oven lid plug. CONSTITUTION:By ensuring a sufficient length l of a gap between an oven wall and a coking plate, coal is prevented from entering through this gap into a space of the coking plate due to a frictional force between coal and the oven wall and between coal and the coking plate. Steam and gas generated near the widthwise center of a carbonization chamber are passed through the louver and introduced into the space of the coking plate, while steam and gas near the oven wall are passed through the gap into the space of the coking plate. Due to the coking plate and an inclined surface structure towards the opening end of a louver structure, the flow of gas into the gap is facilitated so that the acceleration of carbonization near the end of an oven lid can be realized. In addition, a decrease in the coal layer near the end of an oven lid, where carbonization proceeds slowly, can also be accomplished due to the inclined structure.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a furnace lid for a metallurgical coke oven.

[Prior Art] In a metallurgical coke oven, gas containing tar generated by thermal decomposition of coal charged into a carbonization chamber passes through a coal seam and a coke layer, and is passed from a top space above the carbonization chamber to a riser pipe,
The gas is sucked in by a blower through the gas suction main. This gas flow controls carbonization throughout the carbonization chamber, and in particular, the gas flow near the furnace lid at both ends of the carbonization chamber is very important in terms of carbonization efficiency.

Conventionally, in order to improve the gas flow near the furnace lid of a coke oven, for example, Japanese Patent Publication No. 61-49353 has a coking plate held at a distance from the furnace lid through a spacer piece. is proposed. This caulking plate exerts a kind of ironing effect on the coal near the furnace lid, increasing the carbonization effect. By holding this coking plate at a distance from the furnace lid, the gas discharge is improved and the carbonization efficiency of the entire coke oven is increased.

In addition, Japanese Patent Application Laid-Open No. 64-33183 discloses that the opening of the gas rising passage provided in the furnace cover part that protrudes into the coke oven chamber is formed in a louver shape so that the opening of the gas rising passage is formed in the plug of granulated coal during coal charging. A structure is disclosed that prevents entry into the passageway, thereby improving gas flow flow.

[Problem to be solved by the invention]

However, in the caulking plate type,
By promoting the gas flow, improvement in carbonization near the end of the furnace lid is achieved, but a portion of water vapor and gas accumulates in the center of the furnace width at the tip of the coking plate, delaying the carbonization of coal, and the effect is not fully achieved. cannot be mentioned.

Furthermore, in order to promote the flow of gas, it is necessary to increase the opening area between the coking plate and the furnace wall surface, and if the end portion is made larger, the coal charged into the coking chamber will not be able to flow inside the furnace lid plug. There is a contradictory problem that the amount of spillage increases.

In addition, the one-louver type solves the problem of water vapor and gas retention in the caulking plate, but since it is a closed type stopper, it is difficult to deal with tar adhering to the inside of the stopper. There is a problem of separation.

The problem to be solved by the present invention is to provide a furnace lid structure that takes advantage of the respective advantages of coking plates and louvers and eliminates their respective disadvantages, thereby improving the productivity of coke ovens and stabilizing quality. It is in.

[Means to solve the problem]

The structure of the furnace lid part of the coke oven of the present invention is such that gas containing tar generated by thermal decomposition of coal charged in the coking chamber is sucked from the furnace top space above the coking chamber through the coal layer and coke layer. In metallurgical coke ovens, a louver structure in which a plurality of shielding plates are arranged at intervals in the furnace lid hakama is installed in the center of the width direction of the carbonization chamber at 1/2 to 1/3 of the width. At the same time, caulking plates are arranged on both sides of the carbonization chamber to form a space between the two caulking plates, and further, an inclined surface is formed on the caulking plate toward the open end of the louver structure. This is what happens.

[Effect]

By using a coking plate and a looper together, the present invention allows water vapor and generated gas to easily escape into the space, secures a sufficient gap length between the furnace wall and the caulking plate, and prevents charcoal spillage. By narrowing the coking plate toward the louver formed in the furnace lid frame, it is possible to reduce the coal seam in the portion where carbonization is slow, and further promote gas flow, resulting in an improvement in carbonization efficiency.

〔Example〕

The attached figures illustrate embodiments of the invention.

Referring to FIG. 1, which shows the side structure of this embodiment partially in cross section, 1 is a furnace lid frame, and a knife 4 having a seal plate 2 and a plurality of spring mechanisms 3 arranged on the side surface of the furnace cover frame 1 is shown. and is pressed onto the furnace frame 5. 6.7 indicates a caulking plate support placed in the furnace. Reference numeral 8 indicates a louver formed in the cap part, in which plate-like materials are arranged diagonally at intervals that allow gas to flow but prevent the intrusion of charged coal.

In a coke oven having such a structure, the features of the present invention are shown in FIG. 2, which shows the cross-sectional structure taken along the line 1--2 in FIG.

Referring to the figure, 9.10 indicates a caulking plate disposed within the furnace frame 5. Same caulking plate 9
．． 10 are provided along the inside of the furnace frame 5 with sufficient spacing between them by the caulking plate supports 6.7, so that the caulking plates 9.1
Sufficient space is formed between 0's. The looper 8 of the lid part is formed to have a width approximately 1/2 to 1/3 of the internal width, and the caulking brake (9.10) is the looper 8.
It is narrowed towards the end. The angle of inclination α of the inclined portion 13.14 is 30 to 45 from the plane of the furnace wall.
It is most convenient to form between .

It is preferable to provide a heat insulating layer 15 in order to enhance the carbonization function of coal in this space and to prevent thermal distortion of the furnace lid frame 1.

FIG. 3 is a diagram illustrating the prevention of spillage of charged coal and the flow of gas in the lid portion of a coke oven having the above structure.

By ensuring a sufficient gap length 1 between the furnace wall and the coking plate, the frictional force between the coal, the furnace wall, and the surface of the coking plate prevents the coking plate space from moving around through this gap.

In addition, water vapor and gas generated near the center in the width direction of the coking chamber are guided to the coking plate space through the louver, and water vapor and gas near the furnace wall are passed through the gap between the furnace wall and the coking plate, and are guided to the coking plate space. You will be led to the space section. Furthermore, the inclined surface structure that slopes toward the open end of the coking plate and louver structure facilitates the flow of gas into the gap between the furnace wall and the caulking plate, promoting carbonization near the end of the furnace lid. be able to. In addition, the tilted front rudder structure can also reduce the coal seam near the end of the furnace lid, where carbonization is slow.

〔Effect of the invention〕

According to the present invention, it is possible to realize a coke oven cover that has both the advantages of a coking plate and a louver, as shown below.

(1) Water vapor and gas near the furnace lid are sufficiently removed, and the coal seam in the slow carbonization area is reduced.
Carbonization efficiency can be improved.

(2) It is not a sealed type, so it is easy to remove tar etc. when it adheres to the frame part.

(3) Coking in the vicinity of the furnace lid was the rule for carbonization time, but by improving carbonization efficiency in this area, it is possible to reduce carbonization time and improve productivity. .

(4) Since a sufficient gap length between the furnace wall and the coking plate is ensured, it is possible to prevent coal from leaking into the gas space.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view showing the side structure of the lid of the coke oven of the present invention, and FIG.
It is a figure showing a cross-sectional structure seen from a line. FIG. 3 is a diagram showing the functions of a coke oven having the structure of the present invention. Furnace lid frame 2: Seal plate spring mechanism 4: Knife edge Furnace frame 7: Caulking plate support material Rootsy 10: Caulking plate 14: Inclined portion of caulking plate Coal

Claims (1)

[Claims] 1. In a metallurgical coke oven that sucks gas containing tar generated by thermal decomposition of coal charged into the carbonization chamber through the coal layer and coke layer from the furnace top space above the carbonization chamber, the furnace lid plug part A louver structure in which multiple shielding plates are arranged at intervals is placed in the center of the carbonization chamber in the width direction.
At the same time, caulking plates are placed on both sides of the carbonization chamber to form a space between the two caulking plates, and the caulking plate is further provided with a space toward the open end of the louver structure. The structure of the lid of a coke oven, which forms an inclined surface.