JP4770184B2 - Coke oven and method for reinforcing coke oven - Google Patents

Description

  The present invention relates to a coke oven for producing coke and a method for reinforcing the coke oven, and particularly to a nozzle plate receiving brick in a coke oven heat storage chamber.

  A chamber furnace type coke oven has a heat storage chamber in the lower part of the furnace body, and has a structure in which combustion chambers and carbonization chambers are alternately arranged in the upper part. There are several types of fuel gas and air supply methods. One of them is to supply fuel and air from the sole flue (horizontal flame path) at the bottom of the furnace body, and between the sole flue and the heat storage chamber lower part. There is known a furnace of a type in which an adjustment plate (nozzle plate) made of iron plate having a plurality of ventilation holes is attached to the part to enable flow rate distribution of gas and air in the furnace length direction (see, for example, Patent Document 1). ).

  The coke oven is a brick structure, and there is a portion where strength is maintained by stacking bricks. Among such parts, the nozzle plate receiving brick that supports the nozzle plate has a structure in which the nozzle plate and the nozzle plate receiving brick come into contact with each other to support the nozzle plate, and the brick material easily deteriorates due to erosion / damage, It is difficult to maintain structural strength.

  As described above, the nozzle plate receiving brick is a weak portion in terms of the structure of the coke oven, and a portion where the nozzle plate is pulled out and inserted when the nozzle plate is replaced, and is easily damaged. It is. If the nozzle plate receiving brick is damaged, the nozzle plate will tilt and drop off, making it difficult to control the gas flow distribution, resulting in a decrease in heat storage efficiency, and making it impossible to insert and remove the nozzle plate. Many problems occur.

As a technique for repairing the coke oven in the lower part of such a heat storage chamber, for example, a repair method of the sole flue part is known (for example, see Patent Document 2). In Patent Document 2, a self-propelled carriage is run in the sole flue portion, a damaged portion is detected, and mortar is sprayed on the damaged portion to enable repair during operation.
JP-A-8-73859 (refer to [Prior Art] column) JP-A-7-278554

  However, what can be repaired by the conventional repair technique shown in Patent Document 2 is the degree of joint breakage and cracking, and the brick structure itself in the heat storage chamber (the upper part of the sole flue) like the nozzle plate receiving brick It cannot cope with damage such as collapse. The repair of the nozzle plate receiving brick in the coke oven heat storage chamber in operation is practically impossible at present, and it is difficult to smoothly attach and detach the nozzle plate over a long period of time.

  Therefore, the object of the present invention is to solve such a problem of the prior art and enable the nozzle plate receiving bricks in the coke oven heat storage chamber to be detached and attached without causing the nozzle plate to tilt or drop off, It is another object of the present invention to provide a coke oven and a coke oven reinforcing method capable of preventing the nozzle plate receiving brick from being damaged and preventing the nozzle plate from tilting or falling off.

The features of the present invention for solving such problems are as follows.
(1) In a coke oven provided with a nozzle plate supported on both sides by a nozzle plate receiving brick between the coke oven heat storage chamber and the sole flue, a metal member is interposed between the nozzle plate receiving brick and the nozzle plate. And a pair of brick protection portions having corner portions engageable with at least the upper corner portions of the nozzle plate receiving bricks facing each other, and the both brick protection portions are connected at a plurality of positions in the longitudinal direction. A coke oven comprising a connecting portion .
( 2 ) A method for reinforcing a coke oven, wherein the nozzle plate receiving brick that supports the nozzle plate provided between the coke oven heat storage chamber and the sole flue has a structure that supports the nozzle plate via a metal member , A pair of brick protection portions having corner portions engageable with each upper corner portion of the nozzle plate receiving brick facing the metal member at least, and a connecting portion connecting the both brick protection portions at a plurality of locations in the longitudinal direction; A method for reinforcing a coke oven, comprising:

  According to the present invention, damage to the nozzle plate receiving brick can be prevented, and the nozzle plate can be prevented from tilting or falling off, so that the gas flow rate distribution can be stably controlled for a long period of time, and the heat storage efficiency Can be prevented. The nozzle plate can be inserted and removed smoothly for a long period of time, extending the life of the coke oven.

  The present inventors solved this problem by a method other than repairing the brick directly because it is very difficult to repair the nozzle plate receiving brick inside the coke oven heat storage chamber when it is damaged. We thought that it was important to reinforce the nozzle plate receiving brick and prevent damage at the same time. The coke oven is a brick structure, and from the viewpoint of long-term use of the coke oven, it has been generally considered undesirable to use a metal having a difference in thermal expansion. We studied to reinforce the brick part that contacts the nozzle plate, which is the receiving part, with a metal member. And in the coke oven in operation, it was found that it is very effective to reinforce the nozzle plate receiving brick with a metal member and to support the nozzle plate through the metal member, and the present invention was completed. did. That is, in a coke oven provided with a nozzle plate supported on both sides by a nozzle plate receiving brick between the coke oven heat storage chamber and the sole flue, a metal member is interposed between the nozzle plate receiving brick and the nozzle plate. It is characterized by.

  The present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view of a cross section of a coke oven lower part in a direction perpendicular to the furnace length direction. In FIG. 1, a nozzle plate 4 for distributing the flow rate of fuel gas or air is provided on a nozzle plate receiving brick 3 located between the heat storage chamber 1 and the sole flue 2. The nozzle plate receiving brick 3 has a structure that contacts and supports the nozzle plate 4 and is a nozzle plate receiving portion of the nozzle plate receiving brick 3 in order to pull out and insert the nozzle plate when replacing the nozzle plate. Damage is particularly likely to occur in the circled portion in FIG.

  FIG. 2 is a schematic view showing a situation when the nozzle plate receiving brick 3 is damaged in the coke oven of FIG. It can be seen that the nozzle plate 4 is tilted due to the chipping in the nozzle plate receiving brick 3 and there is a risk of dropping the nozzle plate if left alone.

  FIG. 3 shows a state in which the present invention is applied to a coke oven in a state as shown in FIG. In FIG. 3, by inserting a metal member on the nozzle plate receiving brick 3 and supporting the nozzle plate via the metal member, the inclination of the nozzle plate 4 is corrected and held at a predetermined position. In addition, the presence of the metal member 5 reinforces the nozzle plate receiving portion of the nozzle plate receiving brick 3 and prevents damage. If the metal member 5 is installed in contact with the nozzle plate receiving brick 3 and has a structure for supporting at least a part of the nozzle plate 4, it is effective. The metal member 5 preferably has a continuous structure in the furnace length direction so as to become a guide rail when the nozzle plate is taken in and out, but it is not always necessary to install it on the entire nozzle plate receiving brick 3. Further, since the metal member 5 is a member that receives the nozzle plate, the metal member 5 needs to have a structure that does not block the air holes of the nozzle plate 4.

  It is desirable that the metal member installed on the nozzle plate receiving brick is replaceable. Since it is a metal member, it may deteriorate due to corrosion or the like during long-term operation, and it is desirable that it can be taken in and out of the coke oven. In addition, by adopting a replaceable structure, it can be easily applied to an operating coke oven.

  The material of the metal member is appropriately set in consideration of heat resistance and corrosion resistance in the coke oven. Stainless steel and titanium materials are desirable in terms of life, but the ambient temperature is 300 ° C. or less, and the same material as the nozzle plate main body and C gas pipe can be used. For example, SS41 can be used.

  The metal member includes at least a pair of brick protective portions having corner portions that can be engaged with each upper corner portion of the nozzle plate receiving brick facing each other, and a connecting portion that connects the two brick protective portions at a plurality of positions in the longitudinal direction. It is desirable to have. The brick protector protects the corners of the nozzle plate receiving bricks and at the same time protects two bricks that are supported in the furnace on the upper surface of the upper corners where the nozzle plate supporting bricks support the nozzle plate and continue in the furnace length direction. The parts are connected at appropriate intervals by the connecting part.

  One embodiment of the metal member 5 is shown in FIG. 4 is a cross-sectional view in a direction perpendicular to the furnace length direction in a state where the metal member 5 is installed in a coke oven. For example, two angle irons 6 are connected to each other at a predetermined interval in the furnace length direction. Part)). A plan view of the metal member of FIG. 4 is shown in FIG. Another embodiment of the metal member 5 is shown in FIG. Since the nozzle plate receiving portion of the nozzle plate receiving brick 3 is reinforced by the metal member 5 to prevent damage, and even if it has already been damaged, it has the same effect as repairing the damaged portion. The nozzle plate can be inserted and removed smoothly while sliding.

  Next, the installation method of a metal member is demonstrated. Metal members can be installed at the time of construction of the coke oven, but when installing in a coke oven that is in operation or when replacing it, the nozzle plate receiving brick from the coke oven tuyeres with a relatively low temperature is used. It is desirable to insert into the nozzle plate receiving part. The metal member is manufactured in a divided form in advance and can be inserted efficiently while being welded when inserted into the coke oven. Similarly, when taking out a metal member from a coke oven, it is desirable to take out while cutting.

  In addition, when installing a metal member over the entire length of the coke oven (through PS-CS), it can be inserted from the coke oven extruder side (PS side) or from the coke discharge side (CS side). Although it is possible, when a metal member is installed only in the vicinity of the entrance on the PS side and CS side, insertion and removal may be performed from the PS side and CS side, respectively. Since the CS-side receiving brick tends to collapse particularly on the CS side, it is also effective to install the metal member only on the CS-side receiving nozzle plate receiving brick.

  A part of the nozzle plate receiving brick on the CS side of the coke oven collapsed, and the nozzle plate was tilted. The nozzle plate was taken out, and angle steel was inserted as a metal member to reinforce the nozzle plate receiving portion into the nozzle plate receiving brick of the coke oven to form a guide rail for the nozzle plate. The metal member is made of the same steel material (SS41) as the nozzle plate body, has a length that takes into account the expansion allowance in the coke oven, and is similar to that shown in FIG. 4 in which two angle steels are connected at intervals of 1200 mm. Shaped. After inserting the metal member and inserting the nozzle plate into the coke oven using the metal member as a guide rail, the nozzle plate could be installed horizontally.

The schematic of the cross section of a coke oven lower part. Schematic of the cross section of the lower part of the coke oven (when the nozzle plate receiving brick is damaged). Schematic of the cross section of the coke oven lower part (example of the present invention). Schematic (sectional drawing) of one Embodiment of a metal member. Schematic (plan view) of one embodiment of a metal member. Schematic (sectional drawing) of other one Embodiment of a metal member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermal storage chamber 2 Sole flue 3 Nozzle plate receiving brick 4 Nozzle plate 5 Metal member 6 Angle steel 7 Connection member

Claims (2)

  In a coke oven provided with a nozzle plate supported on both sides by a nozzle plate receiving brick between the coke oven heat storage chamber and the sole flue, a metal member is interposed between the nozzle plate receiving brick and the nozzle plate, A pair of brick protection parts having a corner part engageable with each upper corner part of at least the nozzle plate receiving brick facing each other, and a connecting part for connecting the two brick protection parts at a plurality of positions in the longitudinal direction; A coke oven characterized by comprising: A nozzle plate receiving brick that supports a nozzle plate provided between a coke oven heat storage chamber and a sole flue is a method for reinforcing a coke oven having a structure that supports the nozzle plate via a metal member, the metal member Is provided with a pair of brick protection portions having corner portions that can be engaged with at least the upper corner portions of the nozzle plate receiving bricks facing each other, and a connecting portion that connects the two brick protection portions at a plurality of locations in the longitudinal direction. A method for reinforcing a coke oven, comprising:

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