JPH0987633A - Blocking-up method for opening for removing foreign material in repairing coke oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for blocking up an opening for removing foreign materials in repairing a coke oven, where the blocked part can manifest the similar degree of endurance to that of a usual oven wall. SOLUTION: This method for blocking up an opening 11 for removing foreign materials on replacing bricks of a coke oven while maintaining hot, is to provide the opening 11 for removing foreign material with a taper giving the smaller opening area as going from a carbonizing room to a combustion room in the middle part of the oven wall, install bricks 9 having joggles formed in its surroundings for forming the opening by fitting with the joggles in the surrounding bricks and block the opening part 11 by fitting blocking bricks having a taper 15 fitting to the taper 15 of the opening part 11 mediated with a mortar.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blockage of an opening from a carbonization chamber opened to the combustion chamber for the purpose of removing foreign matters falling into the interior of the combustion chamber during hot transshipment of furnace wall bricks in the coke oven carbonization chamber. Regarding the method.

[0002]

2. Description of the Related Art In a conventional chamber-type coke oven, a heat storage chamber is provided at the bottom of a furnace body, and combustion chambers and carbonization chambers are alternately arranged above the heat storage chamber. The coke oven is constructed of refractory bricks, and in particular, the furnace wall bricks in the carbonization chamber are heated by the adjacent combustion chamber and are constantly exposed to high temperatures of 1000 to 1200 ° C, and wet carbon is charged into the carbonization chamber. Each time the furnace wall bricks are rapidly cooled, friction due to extrusion of carbonized coke, lateral pressure, carbon adhesion and peeling that occur during carbonization, and repeated operations under severe conditions. There is.

For this reason, the coke oven causes damage, cracks, and chippings in the bricks of the furnace wall after many years of use. Therefore, the coke oven is regularly inspected to repair the damaged bricks of the furnace wall by thermal spraying or hot work. Partial repairs are carried out using the brick transshipment method. Among these, the hot brick transshipment method is to stop the combustion of the combustion chamber adjacent to the carbonization chamber to the repaired part and to prevent the temperature of the non-repaired part from decreasing, in order to insulate between the repaired part and the non-repaired part. The carbonization chamber is partitioned by a heat-insulating bulkhead with a refractory lining, a heat-insulating curtain or a heat-insulating box is inserted, the repaired part is maintained at an appropriate temperature to ensure a working environment, and the brick wall of the damaged part is dismantled to create a new one. The method of building a brick wall has been adopted.

In this hot brick transshipment, the bricks in the repaired part are transshipped while the combustion chambers other than the repaired part are burned, so that the bricks in the non-repaired part are less damaged by cooling.
It has the advantages that the repair period is short, the repair can be done while the coke oven is in operation, and the coke production is less reduced due to the repair.

In the hot brick transshipment, during the hot transshipment, brick scraps when the bricks are dismantled at the repair site and foreign matters such as mortar which is a joint material at the time of transshipment fall into the combustion chamber, and gas nozzles and air ports at the bottom of the flue May be blocked. Removal of the foreign matter that has fallen into the interior of the combustion chamber
As shown in FIG. 11, in the hot brick transshipment process, from the carbonization chamber 102 to the combustion chamber 1 in the furnace wall brick 101 for each transshipment flue.
03 is provided at a position slightly higher than the furnace bottom to remove foreign matter, and after the hot brick transshipment is completed, the opening 104 is opened.
The ejector nozzle is inserted from here to suck and remove the foreign matter that has fallen to the bottom of the flue.

As shown in FIG. 8, the blockage of the opening leading from the carbonization chamber for removing foreign matter to the combustion chamber is one size smaller than the opening, and the brick 81 is machined to form a gap 8 at the connecting portion of the old and new bricks.
2 is provided, mortar is attached to the brick 81 and the brick 81 is pushed into the opening, and then the gap 82 is sprayed with semi-dry mortar or a method of filling the gap 82 without gap by spraying is adopted.

[0007]

However, according to the above method, the life of the adhesive material filling the gap 82 (2 to 5
(Year), the adhesive strength decreases, and as shown in FIG.
The side pressure 92 of the coke 91, which contracts when the coke 91 is pushed out, pushes the brick 81 embedded in the gap 82 into the combustion chamber, and the brick must be embedded in the gap 82 again for repair. The chamber must be an empty kiln, which is problematic in terms of durability.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a method of closing an opening having the same level of durability as a normal furnace wall in closing the opening for removing foreign matters. It is in.

[0009]

Means for Solving the Problems The present inventors have conducted various tests and studies to achieve the above object. As a result, a taper is provided at the opening for foreign matter removal so that the opening area becomes smaller as going from the carbonization chamber to the combustion chamber, and a blocking brick having a taper matching the taper is fitted with mortar interposed. As a result, it was clarified that the opening blocking portion can exhibit the same level of durability as a normal furnace wall, and arrived at the present invention.

That is, according to the present invention, in the method of closing the foreign matter removing opening at the time of hot transshipment of the coke oven, the tapered foreign matter removing opening whose opening area decreases from the carbonizing chamber to the combustion chamber is provided in the central portion. Then, the opening forming bricks with dowels formed around them are installed on the furnace wall in alignment with the dowels of the surrounding bricks, and the openings are made of occluded bricks with a tapered brick that matches the taper of the openings. A method for closing a foreign matter removing opening when repairing a coke oven, which is characterized by fitting and closing.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The details of the present invention will be described below with reference to FIGS. FIG. 1 shows an opening for foreign matter removal during hot transshipment of a coke oven. FIG. 1 (a) is a horizontal sectional view of a portion provided with the foreign matter removal opening, and FIG. 1 (b) is a foreign matter removal opening. 2 is a front view of a portion provided with, FIG. 2 shows an opening forming brick, and FIG.
(B) Figure is a side view, Figure 3 shows a closed brick,
(A) is a side view, (b) is a front view, FIG. 4 is an explanatory view of a state of applying a side pressure at the time of coke extrusion after the foreign matter removing opening is closed, and FIG. 5 is a ejector nozzle from the foreign matter removing opening. It is explanatory drawing of the state which has inserted and is removing the foreign material from the carbonization chamber.

1 to 5, 1 is a carbonization chamber, and 2 is a carbonization chamber.
Is a combustion chamber, 3 is a furnace wall brick, 4 is a flue partition brick of the combustion chamber 2, 5 is a backstay for fastening the furnace body through a protective plate 6, and 7 is a kiln frame provided at the kiln opening of the carbonization chamber 1. , 8
Is a heat-insulating partition wall when the furnace wall bricks 3 are transshipped, and 9 has an opening 11 of about 150 mm square for easy insertion of an ejector nozzle 10 for removing foreign matter from the furnace bottom of the transshipment combustion chamber 2, and a dowel 12 is formed in the periphery. With the opening forming brick, the rich gas nozzle 13
And the poor gas port and the air port 14 are installed at a position of about 5 to 7 steps of bricks from the bottom of the furnace in alignment with the dowels of the surrounding bricks 3 of the furnace wall so as not to interfere with the removal of foreign matters in the combustion chamber 2. .

As shown in FIGS. 1 and 2, the opening 11 of the opening forming brick 9 has a tapered portion 15 whose opening area decreases from the carbonization chamber 1 to the combustion chamber 2.
Reference numeral 16 is a closed brick having a tapered portion 17 whose opening area becomes smaller as it goes from the carbonization chamber 1 to the combustion chamber 2 so as to be aligned with the opening 11 of the opening forming brick 9, and a mortar for brick transshipment is interposed. It is configured to fit and close the opening 11.

By configuring as described above, FIG.
As shown in FIG. 2, when the transshipment of the furnace wall brick 3 is completed, the ejector nozzle 10 is inserted from the opening 11 of the opening forming brick 9 and the compressed air 18 is introduced to remove foreign matter that has fallen to the bottom of the combustion chamber 2 by the ejector nozzle 10. After suction and removal, the mortar used for normal brick transshipment is applied to the tapered portion 17 of the closed brick 16 to open the opening 1 of the opening forming brick 9.
1 was fitted and closed. Due to the structural strength of the fitting portion, as shown in FIG. 4, it has sufficient durability against the side pressure 22 generated when the coke 21 is extruded in the operation after hot brick transshipment.

The materials of the opening forming brick 9 and the closing brick 16 used in the present invention are, for example,
Use the same material as the silica stone brick used for transshipment of the normal furnace wall brick 3 as shown in Table 1. Further, the opening 11 of the opening forming brick 9 is not limited to a square, and may be a rectangle having a tapered portion 15 or a circular shape,
It goes without saying that it has the same effect. Also,
When the opening 11 of the opening forming brick 9 has a rectangular shape or a circular shape having a tapered portion 15, the closed brick 1 is matched with this.
It goes without saying that 6 is also a rectangle or a circle having a tapered portion 17.

[0016]

[Table 1]

[0017]

[Example] Furnace height 7125mm, furnace width 460mm, furnace length 1
In a 6500 mm coke oven, an opening-forming brick having a tapered opening shown in FIG. 1 was installed in order to remove foreign matter that fell into the combustion chamber when partially transferring 2 bricks of furnace wall brick from the kiln mouth, After inserting the ejector nozzle from the opening of the brick forming the opening to remove the foreign matter that has fallen into the combustion chamber and removing the foreign matter by suction, apply the mortar used for normal brick transshipment to the tapered portion of the closed brick, and In the case of the method of the present invention in which the opening is fitted and closed, and the opening shown in FIG. 10 is provided, foreign matter that has fallen into the combustion chamber is removed by suction by inserting an ejector nozzle from the opening, and then as shown in FIG. After processing bricks that are one size smaller than the opening to make a gap in the connection between the old and new bricks, attach mortar to the processed brick and push it into the opening, then the gap is semi-dry mortar For each of occluded conventional method by attaching, as well as measuring the foreign matter removing work time it was investigated time-dependent change in the intensity of the occluded segment of the foreign object removal opening. The results are shown in FIGS. 6 and 7.

As shown in FIG. 6, the foreign matter removal work time is
There was no difference in 15 minutes between the present invention and the conventional method. Further, as shown in FIG. 7, the durability of the closed portion of the foreign matter removing opening is determined by the conventional method. The holding force of the closing brick is 2 to 4 after hot brick transshipment due to deterioration of the thermal spray material as an adhesive. Significant reduction in the number of years, and indentation of blocking bricks occurred in four years. On the other hand, in the case of the method of the present invention, since it is maintained by the structural strength due to the alignment between the tapered opening of the opening forming brick and the tapered portion of the closed brick, it has durability equivalent to that of a normal furnace wall brick. are doing.

[0019]

As described above, according to the method of the present invention, in the hot brick transshipment of the coke oven, the plugging brick of the foreign matter removing opening is the tapered opening of the opening forming brick and the taper of the plugging brick. Since it is maintained by the structural strength due to the matching with the parts, it has sufficient durability equivalent to ordinary furnace wall bricks.

[Brief description of drawings]

FIG. 1 shows an opening for foreign matter removal during hot transshipment of a coke oven according to the present invention. FIG. 1 (a) is a horizontal sectional view of a portion provided with the foreign matter removal opening, and FIG. 1 (b) is a foreign matter. It is a front view of the part in which the opening for removal was provided.

FIG. 2 shows an opening-forming brick of the present invention,
The figure (a) is a front view and the figure (b) is a side view.

3A and 3B show a closed brick of the present invention, wherein FIG. 3A is a side view and FIG. 3B is a front view.

FIG. 4 is an explanatory view of a state in which side pressure is applied when coke is extruded after the foreign matter removing opening is closed.

FIG. 5 is an explanatory diagram showing a state in which the ejector nozzle is inserted through the foreign matter removing opening to remove the foreign matter from the carbonization chamber.

FIG. 6 is a graph showing the foreign matter removal work time of the method of the present invention and the conventional method in the examples.

FIG. 7 is a graph showing the change over time in the strength of the portion where the opening is closed according to the method of the present invention and the conventional method in Examples.

FIG. 8 is an explanatory diagram of a method of closing the foreign matter removing opening at the time of hot transshipment of a conventional coke oven.

FIG. 9 is an explanatory view of a state in which side pressure is applied when coke is extruded after being blocked by a method of closing the foreign matter removing opening at the time of hot transshipment of a coke oven in the related art.

FIG. 10 is a front view of a conventional foreign matter removing opening.

FIG. 11 is a horizontal cross-sectional view of hot brick transshipment from the kiln mouth to the two flues.

[Explanation of symbols]

 1, 102 Carbonization chamber 2, 103 Combustion chamber 3, 101 Furnace wall brick 4 Partition brick 5 Back stay 6 Protective plate 7 Kiln mouth frame 8 Insulating partition wall 9 Opening formation brick 10 Ejector nozzle 11, 104 Opening 12 Dowel 13 Rich gas nozzle 14 Poor gas port, air port 15,17 Tapered part 16 Blocked brick 18 Compressed air 21,91 Coke 22,92 Side pressure 81 Brick 82 Gap

Claims (1)

[Claims] 1. A method of closing an opening for removing foreign matter at the time of hot transshipment in a coke oven, which has a tapered foreign matter removing opening whose opening area becomes smaller from a carbonization chamber to a combustion chamber and has a periphery. An opening-forming brick with a dowel formed in it is installed on the furnace wall by aligning it with the dowels of the surrounding bricks, and the brick is closed with a taper that matches the taper of the opening. A method for closing an opening for removing foreign matter when repairing a coke oven, which is characterized by: