JPS59187082A - Mending of bottom brick of coke oven carbonization chamber - Google Patents

Abstract

PURPOSE:To enable the mending of the whole floor surface of a carbonization chamber in a short time at a low cost, by charging dried coke powder into a carbonization chamber, and leveling the coke powder over the whole floor surface of the chamber with a pusher to flatten the cavities on the surface of the oven floor brick. CONSTITUTION:The oven lids at the pusher-side 14 and the coke-side 21 of an empty hot carbonization chamber are removed, and a coke guide cage 15 is attached to the oven gate at the coke-side 21. Dried coke powder 17 is charged into the carbonization chamber 8 through the oven gate at the pusher-side 14 and/or the charging hole 16 at the top of the oven, and the pusher ram 18 of the pusher is reciprocated in the carbonization chamber to rub the coke powder into the cavities 13 of the oven floor brick with the pusher ram head shoes 19, 20, and at the same time, to press and solidify the coke powder. The oven floor can be flattened by this procedure, and the floor brick in the carbonization chamber of a coke oven can be mended.

Description

[Detailed description of the invention] Concerning roof tile repair methods.

Insulating a coke oven in an empty house means attaching the furnace cover to the carbonization chamber and charging coal. This is to keep the coke oven hot. For example, there is a method of pound banking in which all the carbonization chambers are kept warm for a long period of time for production adjustment, and a method in which only a part of the carbonization chambers related to the repair is kept warm during the repair period for hot repairs such as combustion chambers. This has the advantage that there is no damage to the coke oven (production can be stopped and production can be resumed after production is resumed).

However, after long-term operation L l'c. The surface of the bottom bricks in the coke oven carbonization chamber is damaged by wear, spalling, erosion, etc. due to the effects of moisture, load, ash content, etc. in the charged coal, as well as resistance during coke cake extrusion. Carbon is deposited and adhered to the concave surface to maintain its smoothness. Therefore, when the cavity is kept warm, the carbon is burned out and the bottom bricks of the carbonization chamber become uneven. If the operation is continued in this state, the resistance at the bottom of the furnace will increase during coke cake extrusion, making extrusion impossible (clogged), and there is a risk that the west side of the furnace wall may collapse (C).

Therefore, after the vacant house has been kept warm, it is necessary to investigate the bottom brick of the carbonization chamber, repair it to ensure that it is not clogged, and restart the operation.

Conventional! One method of repairing damaged hearth bricks is to pour mortar into a concave surface.

However, in this method, since the mortar moisture is about 30%,
Moisture promotes damage to the bottom bricks, the mortar has poor adhesion, and the work load is heavy and the repair process takes a long time since individual repairs are done manually, and repairs of several squares in the center of the carbonization chamber are impossible. There are problems such as the situation being close to possible.

In view of these problems, the present invention proposes a method of reducing the workload and inexpensively repairing the entire length of the coking chamber in a short period of time in repairing the bottom bricks of the coking chamber whose cavities are kept warm.

In the present invention, the dry coke powder is introduced into the carbonization chamber (injected into the carbonization chamber), and the dry coke powder is moved into the carbonization chamber by an extruder so that the dry coke powder fills at least four parts of the surface of the furnace bottom bricks, and the bottom surface of the furnace becomes a small part. Then, when the carbonization chamber goes into operation, the carbon of the generated gas lands on the furnace bottom brick surface K (71) and the fine coke is welded to the furnace bottom brick surface. A smooth and strong carbon layer is formed.

In addition, in the present invention, dry coke powder is spread using the extruder 17 attached to the coke oven, so no special equipment is required, the work is simple, and the bottom bricks can be repaired at low cost. can.

In a preferred embodiment of the present invention, the furnace covers on both sides of the carbonization chamber, which is kept warm in the cavity, are removed, a coke guide cage is installed, and the coke breeze, which has been dried in advance, is carbonized from the extruder side and/or the furnace top charging port. The extruder ram is repeatedly slid back and forth in the carbonization chamber, and the coke powder is rubbed against the concave surface of the bottom brick of the extruder ram and fixed. Also, the remaining coke powder is removed from the extruder head shoe. The guide cage is pushed out from the extruder side to the coke guide side by hitting a part with inclusions such as worm holes, and is collected in a C-C fire extinguishing truck and returned to the sedimentation basin. It is inexpensive, requires less work load, and can repair all of the hearth bricks in a short time.The resistance when extruding coke cake after operation is reduced, and troubles such as clogging (inability to extrude) can be prevented.

Embodiments of the present invention will be described below with reference to the drawings.

In a coke oven, carbonization chambers 1 and combustion chambers 2 are arranged alternately, and a heat storage chamber 4 is connected to the combustion chamber at the bottom of a brick structure 3 located below the carbonization chambers 1. The combustion chamber 2 is partitioned by a brick wall and has many flues ( (not shown).

Fig. 1 is a longitudinal cross-sectional view of a coke oven in which a cavity has occurred during hot repair between three combustion chambers, and shows the unrepaired area adjacent to the carbonization chamber 5 which is in contact with the repaired combustion chamber 2 (indicated by diagonal lines). A heat insulating curtain 7 is provided on the combustion chamber 6 side.

Furthermore, a heat insulating wall (not shown) is installed in the carbonization chamber at the boundary between the repaired combustion chamber 2 and the non-repaired section to secure a working environment, and the repaired combustion chamber 2 is maintained in a hot state by maintaining the non-repaired section in a hot state. The facility will be dismantled and repaired with new brickwork, and after being heated and raised in temperature, it will be used as an operating furnace.

In this case, the next carbonization chamber 8 beyond the non-repaired combustion chamber 6 of the carbonization chamber 7 provided with the heat insulating curtain 7 is in a cavity heat-retaining state,
Furthermore, the next carbonization chamber 9 beyond the unrepaired combustion chamber 6 is in operation. In addition, in the case of cavity hot banking, the entire carbonization chamber is kept in a cavity heat retention state.

Figure 2 shows an example of damage to the bottom brick of the carbonization chamber caused by cavity heat retention. Furnace gI with combustion chamber 6 closed with backstay jO
The bottom brick j2 between I has a concave surface 13 due to abrasion, spalling, erosion, etc. from the joints of the brick due to the influence of the charging coal moisture, ash content, load, etc., as well as the resistance during coke extrusion. It is damaged, and during operation, carbon is deposited and adhered to the concave surface, maintaining its smoothness. However, due to full heat retention (approximately 1000 C), the carbon deposited and attached to the concave surface of the furnace bottom brick is burned out and the concave surface becomes 4V.If the operation is continued in this state, the resistance at the furnace bottom will increase when the coke cake is extruded, causing the coke cake to be extruded. It becomes impossible (clogged), the furnace wall becomes curved,
It may lead to collapse. Therefore, it is necessary to thoroughly investigate and examine the bottom bricks, etc. of the carbonization chamber, which has kept the cavity warm, and repair it to prevent clogging before restarting operation.

FIG. 3 is an explanatory diagram of the present invention, in which the extruder side 14 of the cavity heat-retaining carbonization chamber and the furnace cover of the coke site 21 are removed, and the coke guide cage 15 is installed in the depression of the coke site 2. Next, the coke breeze 17 that has been dried in advance is charged into the carbonization chamber 8 through the window 14 on the extruder side 14 and/or the furnace top charging port 1G, and the extrusion ram 18 of the extruder is slid back and forth within the carbonization chamber. Extruded rathesodoshu-19,2
At 0, coke powder is rubbed into the concave surface 13 of the furnace bottom brick and compacted to repair the sticking. The remaining coke breeze is returned to the extrusion ram head (19.20 parts).

An example of the properties of the coke powder 17 used for the repair described in Section 2 is as follows.

Volatile content: approx. 2% Ash content: approx. 10 Grain size: 3 mm below 70-9 () When the repair of the candy combustion chamber 2 is completed and the coke powder 17 is spread on the bottom of the damaged furnace in the carbonization chamber 8, the remaining The coke powder is removed, and then a furnace lid is attached to the GN section using a coke guide and an extruder.

Coal for coking is then charged into the repaired coal chamber, and the combustion chamber 2, etc. is operated normally. Coal is carbonized.The gas generated at this time is thermally decomposed and carbon adheres to the bottom bricks, and coke powder is welded to the bottom bricks.As a result, the bottom surface of the furnace becomes smooth.

As described above, the present invention can repair the unevenness of the bottom brick of the coking chamber, so the resistance during extrusion of coke cake can be reduced and troubles such as clogging (impossibility of extrusion) can be prevented. As mentioned above, the remaining coke powder is returned to the sedimentation tank, so there is no wastage of side materials and the field is safe.In addition, the work load is low and all of the bottom bricks can be repaired in a short time, making it convenient for coke oven operation. , has beneficial effects.

The present invention is not limited to the above embodiments.

For example, in some cases, the bottom 1 of the carbonization chamber at room temperature may be covered with dry coke powder.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the state of voids due to hot repair of a coke oven, Figure 2 (a) is an enlarged side view of the carbonization chamber in Figure 1, and Figure 2 (b) is the same figure. The plan view of (A) and FIG. 3 are explanatory diagrams showing the condition of the bottom brick of the carbonization chamber according to the present invention. ■... Carbonization chamber, 2...-Combustion chamber, 3... Brick structure, 1... Heat storage chamber, 5... Carbonization chamber in contact with repaired combustion chamber, 6... Non-repaired combustion chamber, 7. - Insulation curtain, 8 - Adjacent carbonization chamber for repair, 10... - Backstay, 11... - Furnace wall, 12... Hearth brick, 1
3...Concave/shaped damaged part (concave surface of hearth brick), 14...
Extruder side, 15. Coke guide cage, 1G.-
Furnace top charging port, 17...-Coke powder, 18. Extrusion ram, 19.20...-Extrusion ratchet/knee, 2
1. “Corkside,” 22. Fire extinguisher. Patent applicant Representative patent attorney Tomoyuki Yafuki (and 1 other person) Whistle 1!21 44444444

Claims (1)

[Claims] The dry coke powder is put into the carbonization chamber, and the dry coke powder is spread on the bottom surface of the carbonization chamber using an extruder so that at least four parts of the surface of the bottom brick are filled with dry coke powder and the bottom surface of the furnace is flat. A method for repairing coke oven coal 1-chamber hearth bricks characterized by -