JPH09183979A - Apparatus and method for preventing gas leak from coke oven lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a gas from leaking through the lid-closing section of a coke oven by preventing the gap between a castable and the door frame of the oven from narrowing due to the deformation of the door frame. SOLUTION: A coke oven is closed with a lid by a mechanism wherein the body 11 of a coke oven 10 is combined with a freely openable lid 12 equipped with a castable 13 which is inserted into the oven body 11 through the opening of the body 11; a knife edge 15 installed on the closing surface of the lid 12 with a pressing spring 16 is kept in tight contact with a door frame 14 installed around the opening of the body 11; and a gap enough for allowing a required amt. of coal 17a for coke making to always exist between the inside surface of the door frame 14 and the castable 13 is provided irrespective of whether the door frame 14 has been deformed toward the inside or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leakage preventing device for a furnace lid in a coke oven for carbonization of raw coal, and a method therefor. The present invention relates to an apparatus and a method for preventing gas leakage from a furnace lid portion that accompanies this.

[0002]

2. Description of the Related Art Generally, as a structure for preventing gas leakage of a furnace lid in a coke oven of this type, as shown in a plane cross section of FIG.
In the combination structure with the openable / closable furnace lid 12 in which the castable (furnace lid refractory brick) 13a to be inserted into the furnace body from the opening 1 is arranged, in the usual case, the opening of the furnace body 11 is made of metal. Around the door frame 14 and a metal knife edge 15 which is brought into contact with the end face on the opening side of the door frame 14 through the spring portion 16 for crimping is arranged in the closed portion of the furnace lid 12. Configure.

When the coke oven 10 is operated, the knife edge 15 of the closed portion on the furnace lid side is brought into close contact with the door frame 14 on the opening portion on the furnace body side. After blocking and sealing with the furnace lid 12,
The raw material coal 17 to be treated is charged to the vicinity of the opening in the furnace body 11, and further to the inner surface of the door frame 14 including the portion of the castable 13a filled in the furnace body 11, and the coking dry distillation treatment is performed in this state. ing. In the figure, 17a is a raw material coal to be treated which is present between the door frame 14 and the castable 13a.

However, in the case of the gas leakage preventing structure of the furnace lid of the general coke oven 10 having the above-mentioned structure, the door is provided around the opening on the furnace body side due to the heat influence during operation and the secular change. As shown in FIG. 3, the frame 14 is distorted and deformed as a whole, and in the original furnace design, the inner surface of the door frame 13, which should originally be connected to the inner surface of the opening, is substantially formed. As shown in the cross section of the central portion of FIG. 4, the inside of the opening, in other words, the furnace lid 12
The castable 13a side that protrudes to the closed surface of is approached, and the portion is narrowed. Therefore, the charging limit position of the raw material coal 16 to be treated is limited to the furnace body side end surface of the door frame 13, and as a result, Creates a void in the narrowed portion, and the gas generated during the treatment that is normally discharged from the upper part of the furnace chamber to the outside is filled in the void portion, and the gas pressure thereof causes the knife edge 15 to the door frame 13. Will leak to the outside through the contacting part of.

In order to prevent gas leakage from the closed surface of the furnace lid, conventionally, by taking measures such as tapping out the knife edge 15, the crimping spring portion 16 causes the knife edge 15 to come out. I try to strengthen the close contact state.

[0006]

However, judging from the results of the present inventors, gas leakage may occur if there is a gap of 0.1 mm or more in the abutting seal portion of the knife edge 15 with respect to the door frame 13. It has been confirmed that, for such a reason, it is extremely difficult to maintain and manage the complete seal between the door frame 13 and the knife edge 15, and so far, the heat influence during operation and the aging as described above have been so far. In reality, it is difficult to avoid gas leakage from the corresponding parts due to the deformation of each corresponding part due to changes and the gaps caused by the adhesion of foreign matter.

Therefore, conventionally, there is a technique having a configuration disclosed in Japanese Patent Laid-Open No. 7-18659, for example. This already proposed technique, as shown in FIG. 5, has a configuration in which the opening of the coke oven 10 is closed by the furnace lid 12,
By forming the notch 18 on the base side of the castable 13b, the gas passage in the furnace is secured and the gas is led out from above the furnace chamber. In the case of this improvement plan, However, the fundamental defect such as the generation of the narrowed space between the door frame 13 and the castable 13b side due to the deformation of the door frame 13 similar to the conventional one has not been solved at all and is not necessarily effective.

Therefore, an object of the present invention is to prevent the occurrence of a narrowed space between the door frame and the castable side due to the deformation of the door frame, thereby preventing gas leakage from the furnace lid closing part side. It is an object of the present invention to provide a method for preventing gas leakage of a furnace lid in a coke oven of this type that is made possible.

[0009]

In order to achieve the above-mentioned object, a method for preventing gas leakage of a furnace lid in a coke oven according to the present invention is designed so that a side surface width of a castable protruding to a closed surface of the furnace lid is entirely surrounded. By setting the required value smaller than the design value over the surface, due to this, in the narrowed space that occurs between the door frame and the castable side due to deformation,
The raw material coal to be treated is always introduced and charged.

That is, the invention according to claim 1 of the present invention is a combination of a furnace body of a coke oven and an openable / closable furnace lid in which a castable is inserted into the furnace body through an opening of the furnace body. In addition, in the closing structure of the furnace lid in which the knife edge provided through the crimping spring portion on the closing surface of the furnace lid is brought into close contact with the door frame provided around the opening of the furnace body, Regardless of how the frame is deformed inward, a space portion is set between the inner surface of the door frame and the castable during operation of the furnace so that a required amount of the raw material coal is always present. This is a device for preventing gas leakage of the furnace lid in the coke oven.

Therefore, in the apparatus for preventing gas leakage of the furnace lid according to the present invention, when the coke oven is operated, a required amount of the raw material coal to be treated is always provided in the space between the inner surface of the door frame and the castable. Because of the interposition, even if the door frame is deformed inward and the space is narrowed due to the influence of heat during operation and aging, etc., it exists in the space and the processing temperature is kept relatively low. No gas is generated from the raw material coal to be treated, and thus the raw material coal to be treated in the relevant portion plays a role of a sealing material, thereby preventing or reducing gas leakage from the closed seal portion.

According to a second aspect of the present invention, in the gas leakage prevention device for the furnace lid in the coke oven according to the first aspect, the width of the castable side surface of the furnace lid is smaller than a normal set value. It is characterized in that it is set to be small by about 20 to 30 mm over the entire peripheral surface.

Therefore, in the gas leakage prevention device for the furnace lid according to the second aspect of the present invention, it is possible to easily set the space portion between the inner surface of the door frame and the castable, in which a required amount of the raw material coal to be treated can always be interposed. obtain.

According to a third aspect of the present invention, a furnace body of a coke oven is combined with an openable / closable furnace lid provided with a castable member which is inserted into the furnace body through an opening of the furnace body. A method for closing a furnace lid, in which a knife edge provided through a crimping spring portion on a closing surface of the furnace lid is brought into close contact with a door frame provided around the opening of the furnace body, Regardless of the inward deformation, a required amount of coking coal to be treated is always present between the inner surface of the door frame and the castables during furnace operation. This is a gas leakage prevention method.

Therefore, in the method for preventing gas leakage of the furnace lid according to the third aspect of the present invention, the action of preventing or reducing the gas leakage from the closed seal portion can be obtained as in the case of the first aspect.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a gas leakage prevention device for a furnace lid in a coke oven and a method therefor according to the present invention will be described in detail with reference to FIG.

FIG. 1 is a cross-sectional plan view of a central portion schematically showing the outline of a gas leakage prevention device for a furnace lid to which the present embodiment is applied. In the configuration of FIG. 1, the conventional example of FIG. The same or equivalent parts as those in the configuration are designated by the same reference numerals.

That is, also in the configuration of FIG. 1, the present embodiment example has the furnace body 1 of the coke oven 10 as described above.
1 is combined with an openable / closable furnace lid 12 in which a castable 13 that is inserted into the furnace body from the opening of the furnace body 11 is combined, and a door frame 14 is provided around the opening of the furnace body 11.
On the other hand, the knife edge 15 provided through the compression spring portion 16 is brought into close contact with the closed surface of the furnace lid 12, and in this case, the castable 13 of the furnace lid 12 is contacted.
As for the space A, the space A in which a required amount of the raw material coal to be treated is always interposed between the inner surface of the door frame 14 and the interior of the door frame 14, specifically, as shown in FIG. As a result of the experiment, the width of the side surface portion of the castable 13 is set to be smaller than the conventional width shown by the dotted line in the figure by about 20 to 30 mm over the entire circumferential surface.

Here, when the coke oven 10 is operated, the knife edge 15 of the closing portion on the furnace lid side is brought into close contact with the door frame 14 on the opening portion on the furnace body side. After closing and sealing with the lid 12,
The raw material charcoal 17 (17a) to be treated is charged to the vicinity of the opening in the furnace body 11 and further to the inner surface of the door frame 14 including the portion of the castable 13 that is full inside the furnace body 11, and coke dry distillation is performed in this state. Do the processing.

Therefore, in the case of the gas leakage prevention structure of the furnace lid 12 in the coke oven 10 according to the present embodiment having the above-mentioned configuration, due to the thermal influence during operation and the secular change,
As described above, even if the door frame 14 provided around the opening on the furnace body side is distorted and deformed so that the space A is narrowed, the interior of the space A is not covered. The treated raw coal 17a is present.

The raw material coal 17a present in the space A is 1000 to 1200 which is the dry distillation treatment temperature of the raw material raw material coal 17 which is red-heated inside the furnace body 11 side.
Since it is about 100 ° C., which is low when compared to 0 ° C., there is no gas generation or tar generation in the raw material coal 17 a to be treated here, and as a result, the raw material coal 17 itself is a kind. Of the knife edge 15 to the door frame 14 as in the prior art can prevent or reduce the gas leakage from the abutting portion of the knife edge 15, which is shown in the experiments by the present inventors. It was confirmed that a gas leakage prevention effect of 90% or more in comparison with the current state can be obtained. In addition, since the raw material coal 17a to be treated in the space A is kept at a relatively low temperature, the door frame 14 and The temperature of the castable 13 does not rise more than necessary, and the service life thereof can be extended, and the tar adhesion to the door frame 14 and the castable 13 can be sufficiently reduced. Than it is.

[0022]

As described above in detail in the embodiments, according to the invention described in claim 1 of the present invention, the coke oven furnace body is inserted into the furnace body through the opening of the coke oven. In addition to combining the openable and closable furnace lid with castables, the knife frame provided on the closed surface of the furnace lid via the crimping spring part is closely attached to the door frame installed around the opening of the furnace body. In the closed structure of the furnace lid to be brought into contact, a required amount of the raw material coal is always present between the inner surface of the door frame and the castable during the furnace operation regardless of the deformation of the door frame to the inside. Since the space for the coke oven is set up, the required amount of coking coal to be treated is always present in the space between the inner surface of the door frame and the castables during the operation of the coke oven. And sutra Based on changes, etc., even when the door frame is deformed inward and the space is narrowed, there is no gas generation from the coking coal to be treated which is present in the space and the treatment temperature is kept relatively low, As a result, the raw material coal to be treated plays a role of a sealing material, and it is possible to effectively and easily prevent or reduce the gas leakage from the closed seal portion, and, on the other hand, the knife edge for the door frame. It has excellent features such that the management standard of the contact gap can be set relatively rough, and the overall configuration is extremely simple and can be easily implemented.

According to a second aspect of the present invention, in the gas leakage prevention device for the furnace lid in the coke oven according to the first aspect, the width of the castable side surface of the furnace lid is set to a normal set value. 20-30m over the entire circumference than
Since it is set to be small by about m, it is possible to easily set a space portion between the inner surface of the door frame and the castable, in which a required amount of the raw material coal to be treated can always be interposed.

Further, according to the invention of claim 3 of the present invention, the furnace body of the coke oven, and the openable and closable furnace lid with the castables inserted into the furnace body from the opening of the furnace body are provided. In the method of closing the furnace lid, a door frame provided around the opening of the furnace body is closely contacted with a knife edge provided on the closing surface of the furnace lid via a crimping spring portion. Despite the deformation of the inside of the furnace, a required amount of the raw material coal is always present between the inner surface of the door frame and the castable during the furnace operation. Therefore, the same as the case of the above-mentioned claim 1. Moreover, it is possible to very easily prevent or reduce the gas leakage from the closed seal portion.

[Brief description of the drawings]

FIG. 1 is a central sectional plan view schematically showing an outline of a gas leakage prevention device for a furnace lid in a coke oven to which an embodiment of the present invention is applied, in a charging state of raw material coal to be treated.

FIG. 2 is a central cross-sectional plan view schematically showing an outline of a gas leakage prevention device for a furnace lid in a general coke oven in a charged state of raw material coal to be treated.

FIG. 3 is a vertical cross-sectional view showing a modification of a door frame in the above coke oven.

FIG. 4 is a central plan cross-sectional view schematically showing an outline of a gas leakage prevention device for a furnace lid in a state in which a door frame of the coke oven is deformed, in a charged state of raw material coal to be treated.

FIG. 5 is a central cross-sectional plan view schematically showing an outline of a gas leakage prevention device for a furnace lid in an improved conventional coke oven in a charged state of raw material coal to be treated.

[Explanation of symbols]

 10 Coke Oven 11 Furnace Body 12 Furnace Lid 13 Castable 14 Door Frame 15 Knife Edge 16 Crimping Spring 17,17a Coated Coal A A Space between Door Frame and Castable

Claims (3)

[Claims] 1. A coke oven furnace body and an openable / closable oven lid provided with a castable insertable into the furnace body through an opening portion of the coke oven are combined and provided around the opening portion of the furnace body. In a closed structure of a furnace lid in which a knife edge provided through a spring portion for pressure bonding is closely contacted with a closed surface of the furnace lid with respect to a door frame, the furnace is irrespective of the inward deformation of the door frame. A gas leakage prevention device for a furnace lid in a coke oven, characterized in that a space is provided between the inner surface of the door frame and the castable during operation so that a required amount of raw material coal is always interposed. 2. The coke oven according to claim 1, wherein the width of the castable side surface of the furnace lid is set to be smaller than a normal set value by about 20 to 30 mm over the entire peripheral surface. Gas leak prevention device for furnace lid. 3. A coke oven furnace body and an openable / closable oven lid having castables inserted into the furnace body from the opening portion of the coke oven are combined with each other and provided around the opening portion of the furnace body. A method of closing a furnace lid, in which a knife edge provided through a pressure-bonding spring portion is brought into close contact with a closed surface of the furnace lid with respect to a door frame, regardless of whether the door frame is deformed inward, A method for preventing gas leakage of a furnace lid in a coke oven, wherein a required amount of raw material coal is always interposed between an inner surface of the door frame and the castable during operation.