JPS6038436B2 - coke oven door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coke oven door, and specifically relates to a refractory installed on the rear surface of a coke oven door by blowing oxygen or a gas containing oxygen through the refractory from the front surface of the coke oven door. This invention relates to a coke oven door that prevents carbon from adhering to its surface.

Conventionally, coke oven doors have been plagued by the adhesion of free carbon during coal carbonization.

When the carbon deposits grow, the door becomes distorted when the door is closed, leading to a deterioration of the working environment due to gas leakage, and furthermore, pollution problems due to air pollution may occur. It is a well-known fact that conventionally, in order to remove adhering carbon, carbon is scraped off with a metal rod after leaving the kiln. However, this work has the disadvantage that it is difficult to remove adhering carbon even though it requires a heavy physical load on the worker, and that the worker is directly exposed to high-temperature gas containing harmful components such as tar vapor.

Therefore, in order to reduce the physical stress on workers during carbon removal work, mechanization has been attempted, and door cleaners have been introduced to scrape off the adhering carbon, but it is insufficient and in some cases may cause damage to the shutters. There are drawbacks.

On the other hand, some fused silica bricks are used for door refractories as a preventive measure. This brick is a glass composition refractory made by crushing fused quartz, casting it using a slip-casting method, and firing it.Using the good surface toughness that is a characteristic of this type of brick, it prevents the intrusion of tar particles. Although this silica brick is intended to reduce the adhesion of carbon, under usage conditions of approximately 120,000 or more, it begins to crystallize into cristobalite, which not only causes cracks in the structure and makes it easier for tar to penetrate. It has the disadvantage of being 7 to 8 times more expensive than fused silica bricks, and even though it uses fused silica bricks, it relies on a door cleaner to remove carbon. The reality is that there are. In order to improve the above-mentioned drawbacks of coke oven doors, the present invention is designed to remove adhering carbon without relying on manual labor or door cleaners, and without relying on molten silica bricks. A gas inlet pipe is installed on the front of the furnace door to blow oxygen-containing gas into the refractory installed in the door. It was developed for the purpose of burning and removing carbon that is supplied to the surface of refractories and adheres to the surface of refractories.

The clay bricks conventionally used for coke oven doors are 0.01 to 0.06 [earth/ga'no/sec/k9' ground]
By blowing gas containing a very small amount of oxygen from the back of the refractory, the gas is sent to the inner surface through the pores of the refractory, thereby preventing carbon from adhering. Even if it does, it will burn and the ash can be easily removed. The present invention will be explained in detail below with reference to the drawings, but the scope of the present invention is not limited by the examples described below.

Example A gas blowing structure was provided on the coke oven door where carbon deposition occurs.

That is, FIG. 1 is a vertical sectional view of a coke oven door equipped with a gas blowing structure according to an embodiment of the present invention, and FIG. 2 is a horizontal sectional view thereof. As shown in FIGS. 1 and 2, a gas introduction pipe 3 is provided in front of the coke oven door by branching from a gas main pipe 2 disposed in front of a coke oven door 4, and air is passed through this pipe. is blown onto the back surface of the door brick 1, and air is sent to the surface of the door brick where carbon adhesion occurs due to the gas permeability of the blower, thereby preventing carbon adhesion.

Table 1 summarizes an example of the results of removing carbon deposits by supplying air to bricks stretched on the rear surface of the door using the coke oven door of the present invention.

Previously, we had removed the adhering carbon by removing the bulk with a metal rod every time we opened a business, or using a door cleaner every 4 to 5 days, but we did not see much of an effect. According to the present invention, as illustrated in Table 1, almost no carbon was observed overall except for a very small amount of carbon adhesion at the joints. In addition, most of the carbon adhering to the joints turns into ashes and is easily peeled off by the impact of attaching and detaching the door, so there is no need to remove the carbon.

Note that the gas supplied from the gas introduction pipe 3 is not limited to air, and oxygen-enriched air or oxygen gas can also be used. Table 1.
Implementation results *1 {Gununminato Dendoji Sako Tsutomu Medical Denji Results Words; Kiwashi Junior High School X4
440 skin height (one door) As described above, according to the present invention, oxygen or oxygen-containing gas can be flowed in advance from the front surface of the coke oven door to the surface of the door brick by utilizing the gas permeability of the refractory. This product has the remarkable effect of effectively preventing carbon from adhering to the surface, reducing the physical load on the worker by eliminating the conventional carbon removal work, and improving work efficiency. It is.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a door according to the present invention, and FIG. 2 is a horizontal sectional view thereof. 1...Door brick, 2...Gas main,
3...Gas introduction pipe, 4...Coke oven door. Figure 1 Figure 2

Claims (1)

[Claims] 1. A coke oven door characterized in that a gas inlet pipe for blowing oxygen-containing gas into a refractory stretched over the door is provided on the front surface of the coke oven door.