JPS6063277A - Method for removing scale in sleeve of coke oven charging cart - Google Patents

Abstract

PURPOSE:To spray water to wash and cool the interior of sleeves of a charging cart and remove the titled scales with ease, by providing drainage pits and spray nozzles at positions corresponding to the respective sleeves of the charging cart on the oven between the coke oven end chamber and a coal bin. CONSTITUTION:Opened drainage pits 14 and water spray nozzles 13 thereon are provided at positions at least corresponding to the respective sleeves 8 of a charging cart 2 on a coke oven 1 between the coke oven end chamber 3 and a coal bin 5. The charging cart 2 after completing the charging of raw material coal into a carbonization chamber of the coke oven 1 is moved to the direction of the coal bin 5 for coal supply, and stopped above the drainage pits 14 of a water washing part 4. A hood 9 is then lowered to lower the sleeves 8 supported by connecting levers 15. A valve 11 is then opened to jet pressurized water from the spray nozzles 13 to wash and cool the inner surface of the sleeves 8 and remove scales in the sleeves 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing scale deposited on the inner surface of a sleeve of a coke oven charging car. In this method, a drainage pit that opens and an injection nozzle that sprays pressurized water are provided, a charging vehicle that has finished charging is stopped on the drainage pit, and the inner surface of the sleeve is washed and cooled with pressurized water.

Here, what is the sleeve of a coke oven charging car?

When charging the coking coal in the coking coal hopper of the charging car into the coking chamber, the gap between the chute at the bottom of the hopper and the charging port is made to hang down from the bottom of the chute to prevent dust and gas from scattering. It is a cylindrical piece that covers the space between it and the charging port.

Here, the sleeve is heated by the hot gas rising from the carbonization chamber just as the raw coal is being charged, and the raw coal that comes into contact with this is fixed as scale. For this reason, while the coking coal is being charged repeatedly, the inner surface of the sleeve becomes covered with scale, making it impossible to move the sleeve up and down, and the temperature of the sleeve rises, causing a strain of 1 in the equipment force. It had the following drawback.

In order to overcome this drawback, conventionally, the scale that had adhered to the inside of the sleeve was removed by hitting the outside of the sleeve with a hammer, but the scale that had grown over a long period of time was hard and hard to remove. Furthermore, since the sleeve is at a high temperature, removing it is dangerous and requires a lot of effort.

Regarding this point, as a result of intensive study by the present inventors, it was found that the scale falls off easily in the initial stage (it has been found that it has physical property A, which is 7), so water should be injected into the sleeve at relatively short intervals. For example, the inventors have discovered that the temperature of the sleeve does not rise, the formation of school can be suppressed, and the scale formed can be easily washed away, and the present invention has been achieved.

An object 1d of the present invention is to wash and remove scale adhered to the inner surface of the sleeve of a coke oven charging car using pressurized water. The purpose of this is between the coke oven and the cole bin (7): Above the coke oven,
At least at a position corresponding to each sleeve of the charging car, a drainage pit that opens and a water injection nozzle for cleaning the inner surface of the sleeve are provided in the drainage pit, and the charging car that has finished charging is stopped in the drainage pit, This is accomplished by spouting water through the nozzle.

In the present invention, scale removal is preferably carried out every 7 times, but a sufficient effect can be obtained even if it is carried out at a rate of about 3 times.

During a visit to practice the present invention according to Figures 1 to 5, the first
In Figures 1 and 2, the charging car λ, which has finished charging coking coal into the coking chamber of the coke oven, is filled with coal bins for feeding coal. It moves in the direction of 3 and stops above the drainage pit of the water wash 71 [1. The position of the drain pit I// may be directly under the coal bin J as long as it is between the end furnace 3 and the coal bin J, and there is no particular restriction on the location, but the position does not interfere with other coke oven operations, and , a position that does not require any extra manipulation is preferably selected.

Next, as shown in FIGS. 3 to A', the hood is lowered, and the sleeves supported by the connecting rods are lowered. Next, the pallet 7// is opened and pressurized water flows into the nozzle//.
The injected water collides with the inner surface of the sleeve, cools and washes the sleeve, and then falls into the drainage pit and is discharged through the drainage conduit.

The shape of the nozzle 3 may be any shape as long as the water spreads out in a conical shape, and there is no particular restriction on the number of nozzles, but it is preferable to provide 3 or more, and 3 or more for uniform cleaning. As shown in Figures 6 and 2, it is convenient to use the nozzle as shown in Figures 6 and 2. 3
i Varnish I) After inserting into L-f, y, nozzle/3
A device that sprays clean water to remove scale may also be used. The drainage pit may have at least an opening at a position corresponding to each sleeve of the charging vehicle and can introduce water that has washed the inner surface of the sleeve into the drainage pit, and its specific structure is not particularly limited. It is not something that will be done.

For example, there is a method in which an opening is opened only at a position corresponding to the sleeve and a drain passage is embedded and the openings are connected to each other with piping or the like, or a side gutter type in which the opening and the drainage passage are simply integrated.

In addition, if the opening of the water extraction pit is circular like the sleeve, the diameter is preferably at least the inner diameter of the sleeve (in the case of a III groove type, the width is preferably at least the inner diameter, but it is not necessarily limited to this). Various sizes and shapes are possible as long as the cleaning water can be finally introduced into the drainage channel without being washed away.

The spray pressure of the cleaning water is used to declare the cleaning effect.

Higher is preferable, but usually 1'kg/cJ'G or more,
Preferably, use j~/evening1c9/cni-G.

As described in detail above, the present invention relates to washing and removing scale fixed to the inner surface of the sleeve of a coke oven charging car using pressurized water. ~)- can be removed, thereby greatly reducing the labor burden of furnace operations and making a significant contribution to the automation of coke oven operation.

[Brief explanation of drawings]

FIG. 7 is a front view of a coke oven group in which the present invention is implemented, FIG. FIG. 5 is a plan view of the sparse water washing section, FIG. 6 is a plan view of another method, and FIG. 2 is a plan view of the same work. /; Coke oven confirmation; Charging car 3; Coke oven window gu: Water washing section ta; Coal bin 2; hopper tray ta; Foot/θ: Chute /3. Nozzle/G; Drainage Pit/Ni; Leverage Applicant Mitsubishi Chemical Industries Co., Ltd. Representative Patent Attorney Hase - 7 other men 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] On the coke oven cooling section between the coke oven end and the waling bin, at least at a position corresponding to each sleeve of the charging car, a drain pit is opened and a water injection nozzle for washing the inner surface of the sleeve is provided in the drain pit; A method for removing scale inside a sleeve of a coke oven charging car, comprising stopping the charging car after charging on the drain pit, and spraying water through the nozzle to wash and cool the inner surface of the sleeve.