JP2000204373A - Sealing of charging hole lid of coke oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for improving sealing properties of a charging hole lid of a coke oven without requiring a specific apparatus. SOLUTION: At least one of a lid 4 and a washer 3 of a charging hole 2 is made hollow, water is fed to hollow parts 7 and 8 and is evaporated into steam by heat from a coke oven. The steam is supplied to a gap between the lid 4 and the washer 3 of the charging hole 2 under a furnace pressure or higher than it in the coke oven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for sealing a charging lid of a coke oven which does not require any special equipment.

[0002]

2. Description of the Related Art Conventionally, a lid for a coal charging hole of a coke oven is used with only a single circular lid made of cast iron, and a seal is made by contacting the surface of the washer with the surface of the lid. I have.

[0003] The inside temperature of the lid on the coke oven side is about 1000 ° C because the lid is housed in the charging hole except when coal is charged into the coke oven carbonization chamber. The temperature becomes normal by being removed from the charging hole by the removing device. The lid used under severe conditions that repeatedly receives this rapid temperature change is susceptible to thermal deformation, and when the lid is deformed, a gap is created between the washer of the charging hole and the contact surface of the lid,
Gas leakage of coke oven gas occurs and is released to the atmosphere.

[0004] Tar and carbon generated from the coke oven adhere to and accumulate on the washer surface and the lid of the charging hole, and the surface becomes uneven, so that the washer and the lid of the charging hole are formed similarly to the thermal deformation of the lid. A gap is generated in the contact surface of the coke oven, and gas leakage of the coke oven gas occurs similarly.

As a general countermeasure against gas leakage, there is known a method in which mortar is poured on the circumference of the charging hole to fill a gap between the charging hole and the lid. In addition to the fact that the mortar poured on the circumference of the charging hole cracks due to factors such as the washer of the charging hole and the deformation of the lid due to the temperature change in the coke oven, In reality, this is not a sufficient measure.

Japanese Utility Model Application Laid-Open No. 60-156155 proposes a measure for improving adhesion of tar and carbon by forming a ceramic sprayed layer on one or both of a washer surface and a lid surface of a charging hole as a measure against gas leakage. are doing.

[0007]

However, even if the problem of adhesion of tar, carbon, etc. is solved, the washer and lid of the charging hole are exposed to a high temperature (about 1000 ° C.) and are thermally deformed. A gap is created between the washer and the contact surface between the lid and gas leakage cannot be avoided.

Further, all of the above methods require a special apparatus such as a mortar liquid injection equipment for sealing, which is a factor that raises the cost of producing coke, and in addition, the sealing properties are incomplete and improved. Was required.

An object of the present invention is to provide a method for improving the sealing performance of a charging lid of a coke oven without requiring any special equipment.

[0010]

Means for Solving the Problems The present inventor has the following (A)
And (B) were obtained. (A) Focusing on the heat radiation of the coke oven, at least one of the lid and the washer is made hollow, water is put into the interior, and this water is heated by the heat dissipated by the coke oven, so that the pressure is higher than the gas pressure in the oven. Can generate steam.

(B) When a plurality of the generated steam are injected between the lid and the washer through the pressure regulating valve, the gas in the furnace can be prevented from leaking, so that the sealing effect is large.

The present invention has been made based on the above findings. The gist of the present invention is that at least one of the lid of the charging hole and the washer is hollow, water is poured into the hollow portion, and the water is coke Sealing a charging lid of a coke oven, wherein the steam is evaporated by heat from the furnace into steam, and the steam is supplied to a gap between a charging hole lid and a washer at a pressure equal to or higher than the furnace pressure in the coke oven. Method ".

[0013]

FIG. 1 is a schematic diagram showing a method for implementing the present invention. As shown in the figure, an appropriate amount of water is supplied from a water supply pipe 6 through a water supply valve 10 to the hollow portion 8 of the lid and / or the hollow portion 7 of the washer.

The supplied water is heated by the heat in the coke oven 1, and the heat is transferred to the water in the hollow portion 8 and / or the hollow portion 7 of the washer, reaches the boiling point, and generates steam.

This steam is retained in the hollow portion 7 of the lid and / or the hollow portion 8 of the washer until the set pressure of the pressure regulating valve 5 is reached.

When the pressure reaches the set pressure or more, the pressure adjusting valve 5 moves the gap 9 (the washer 3 and the lid 4 as described above).
Is exposed to high temperature (approximately 1000 ° C.) and is thermally deformed, and a gap is formed at the contact surface between the washer 3 and the lid 4). Together with the riser (not shown).

The pressure of the pressure regulating valve 5 is set to a pressure equal to or higher than the furnace pressure in the coke oven. The pressure-regulated steam seals the gap 9 between the lid of the charging hole and the washer, and the generated gas flows out of the furnace. Leakage can be prevented.

The discharge of water vapor from the pressure regulating valve 5 is automatically performed when a set pressure value in the hollow portion 8 of the lid and / or the hollow portion 7 of the washer is reached.

FIG. 2 is an enlarged view of the pressure regulating valve 5 near the lower portion of the water supply pipe 6, and when the pressure becomes equal to or higher than the set pressure, the water vapor generated in the hollow portion 8 of the lid and / or the hollow portion 7 of the washer is used. Spring (not shown) is pushed and valve (not shown)
Is opened and the steam outlet 11 is
Thus, the gap 9 can be sealed.

The number of pressure regulating valves 5 is preferably 3 to 12. The reason is that if it is less than 3, the pressurizing effect may be reduced, and if it exceeds 12, the equipment becomes complicated and management problems arise. Preferably, the number is 5 to 10.

As the water to be supplied, pure water, drinking water, industrial water and the like can be used, but pure water and drinking water are preferable in view of the problem of generation of scale or scale.

It is desirable that the water supplied to the lid and the washer is preheated and used in the coke oven riser because the heat of the coke oven can be further utilized.

[0023]

According to the method of the present invention, the sealing property of the gap between the lid of the charging hole and the washer is improved, and the leakage of generated gas during carbonization can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a method for implementing the present invention.

FIG. 2 is an enlarged view of a pressure regulating valve near a water supply pipe.

[Explanation of symbols]

 1: inside the coke oven 2: charging hole 3: washer 4: lid 5: pressure regulating valve 6: water supply pipe 7: hollow part of the washer 8: hollow part of the lid 9: gap part between the washer and the lid 10: water supply valve 11 ： Steam outlet 12 ： Steam outlet tube

Claims (1)

[Claims] At least one of a lid and a washer of a charging hole is made hollow, water is poured into the hollow portion, and the water is evaporated by heat from a coke oven to form steam. A method for sealing a charging lid of a coke oven, characterized in that a gap between the lid and a washer is supplied at a pressure higher than a furnace pressure in the coke oven.