JP6543310B2 - Method of constructing combustion chamber adjacent to pinion wall of coke oven - Google Patents

Description

The present invention is constructed by disassembling the wall and ceiling of the combustion chamber adjacent to the pinion wall of the coke oven and carrying it out of the furnace, and then carrying the module block into the furnace to construct a wall. it relates to the law.

FIG. 3 is a horizontal sectional view schematically showing a main part of the coke oven, and FIG. 4 is a perspective view schematically showing an example of a combustion chamber wall.
In general, as shown in FIG. 3, a coke oven, as shown in FIG. 3, includes a carbonization chamber 2 for carbonizing coal, a combustion chamber 1 for burning a fuel gas, a heat storage chamber for preheating fuel gas and combustion air using residual heat of combustion exhaust gas The combustion chambers 1 and the carbonizing chambers 2 are alternately arranged. That is, as shown in FIG. 4, the combustion chamber 1 is formed inside the wall 3 of the refractory brick that separates the adjacent carbonizing chambers 2 from each other. The inside of the wall 3 is divided into small portions by the partition 5 (so-called binder) made of refractory brick. Hereinafter, a binder formed by combining conventional refractory bricks will be referred to as a brick aggregate binder.

  Then, during the operation of the coke oven, after charging the coal into the carbonization chamber 2 and carbonizing it by the heat of combustion generated in the combustion chamber 1, the work of discharging the obtained coke from the carbonization chamber 2 is repeated. As a result, the wall body 3 formed of refractory bricks is worn away, and a problem occurs that combustion exhaust gas and unburned fuel gas leak from the combustion chamber 1 into the carbonization chamber 2.

Therefore, although the wall 3 of the combustion chamber 1 has to be repaired as appropriate, stopping the combustion chamber 1 and the carbonizing chamber 2 of the coke oven to repair all of them causes problems in coke production. Therefore, while operating the coke oven, only the combustion chamber 1 to be repaired is stopped burning to perform repair. The procedure of the repair work is
(A) Disassemble the wall 3 and ceiling of the combustion chamber 1 to be repaired and carry it out of the furnace,
after that,
(B) It is roughly divided into a two-step process of constructing a wall 3 and a ceiling newly.

  Conventionally, in the process (B), the worker builds up the wall 3 and the ceiling by stacking refractory bricks one by one in the furnace. However, since firebricks are stacked manually, it takes a very long time. In addition, since the working environment is at a high temperature, equipment for securing the safety of workers is required, which causes an increase in construction cost.

Therefore, a firebrick aggregate (hereinafter referred to as a module block) formed by stacking firebricks and forming them into a predetermined shape (that is, a shape that forms part of the wall 3 and a ceiling) is manufactured in advance at a ground construction site outside the furnace. In the process of (B) above, the module block is carried into the furnace, and the repair work for constructing the wall 3 and the ceiling is beginning to spread. By using the module block, it is possible to efficiently carry out the repair work, and the construction period can be shortened. In addition, the load on workers is reduced, and the effect of improving safety can also be obtained.
However, since the module block is a heavy weight having a large size, it can not be carried by a worker.

  In response to this problem, an apparatus has been developed to carry the module block into the coke oven. For example, Patent Document 1 discloses a hanger for gripping and lifting the side surface (that is, the surface perpendicular to the binder) of the module block (see FIG. 14).

  When constructing the wall of the combustion chamber adjacent to the outer wall of the coke oven (so-called pinion wall), using the hangers that hold the side of the module block lowers the module block to the position of the combustion chamber adjacent to the pinion wall In this case, the arm holding the module block interferes with the pinion wall. Then, there is a problem that the pinion wall is damaged by the arms of the hanger, and a large gap corresponding to the thickness of the arms of the hanger is generated between the module block and the pinion wall. In other words, it is an extremely difficult task to construct the wall of the combustion chamber adjacent to the pinion wall by using the hangers that grip the side surfaces of the module block.

JP, 2015-81300, A

The present invention solves the problems of the prior art, and in constructing the wall of the combustion chamber adjacent to the pinion wall, the module block is easily carried into the furnace and the combustion chamber adjacent to the pinion wall is It is possible to lower the module block in place, moreover, to provide a construction how to build a wall while preventing damage or disruption of the refractory bricks constituting the module blocks not only damage the pinion wall With the goal.

  In order to construct the wall of the combustion chamber adjacent to the pinion wall, the present inventors inevitably use the hangers to grip the side of the module block (ie, the plane perpendicular to the brick aggregate binder). Focusing on the fact that the arm of the tool interferes with the pinion wall, a technique for holding the brick aggregate binder and lifting the module block was studied.

  That is, if the brick block binder is gripped and the module block is lifted, interference with the pinion wall does not occur when the module block is lowered to a predetermined position, but by holding and applying a load, the brick block There is a risk that the joints of the refractory bricks of the binder will break up and thus the entire module block will collapse. Therefore, instead of the brick aggregate binder, it is necessary to incorporate one having sufficient strength into the module block.

  Further, as a result of further examination, if the same shape as the conventional brick aggregate binder is integrally molded with an unshaped refractor, a sufficiently strong binder (hereinafter referred to as an integrally molded binder) can be obtained. We found that grasping the forming binder with a lifting tool can prevent damage and breakage.

The present invention has been made based on such findings.
That is, according to the present invention, when repairing the wall and ceiling of the combustion chamber adjacent to the pinion wall of the coke oven, the wall and ceiling are disassembled and carried out of the furnace, and then the module block is carried into the furnace In a method of constructing a wall of a combustion chamber in which a new wall is constructed adjacent to a pinion wall, at least two integral molding binder integrally formed of a monolithic refractory are disposed in a module block, and the other A brick assembly binder is disposed, the integral molding binder is held by a lifting tool, the module block is lifted and carried into the furnace, and subsequently lowered to a position adjacent to the pinion wall to stack the module block. It is a construction method to construct a body.

  In the construction method of the present invention, the module block is preferably carried into the furnace from the opening of the ceiling or by using a beam installed on the ceiling. Further, it is preferable to mix non-intumescent mortar with water and to flow into the gap between the pinion wall and the module block.

  According to the present invention, it is possible to easily carry the module block into the furnace and to lower the module block to a predetermined position of the combustion chamber adjacent to the pinion wall, and not only damage to the pinion wall The wall body can be constructed while preventing damage or breakage of the integral molding binder constituting the module block, thereby achieving an industrially significant effect.

It is a front view which shows typically the example which constructs the wall of the combustion chamber which adjoins a pinion wall with the construction method of this invention. It is a horizontal sectional view of the module block shown in FIG. It is a horizontal sectional view showing typically the important section of a coke oven. It is a perspective view which shows the example of the wall of FIG. 3 typically. It is a perspective view which shows typically the example of the hanger for lifting the module block shown in FIG.

First, the method for constructing a combustion chamber of the present invention will be described.
FIG. 1 shows that the wall and ceiling of the combustion chamber adjacent to the pinion wall are disassembled and carried out of the furnace (step (A) above), and then the wall is newly constructed using the construction method of the present invention It is a front view which shows typically the example to do.
The hanger 7 carrying the module block 4 grips the end face perpendicular to the longitudinal direction of the module block 4 so as not to interfere with the pinion wall 8. By doing this, the module block 4 can be lowered along the pinion wall 8, and the side surface of the wall 3 can be constructed to abut on the pinion wall 8.

  FIG. 2 is a horizontal sectional view showing the module block in FIG. 1 in an enlarged manner. In the present invention, it has already been described that the arm of the hanger 7 grips the end face perpendicular to the longitudinal direction of the module block 4, but specifically, the end face of the integrally formed binder 6 is gripped as shown in FIG. In addition, although the example of the module block 4 comprised by FIG. 2 by the two integral molding binder 6 and the two brick aggregate binder 5 is shown, the integral molding binder 6 which comprises the module block 4 to which this invention is applied. The total number of brick aggregate binder 5 is not limited.

  As described above, the brick aggregate binder 5 is formed by combining refractory bricks, as shown in FIG. When the present invention is applied to a module block 4 in which the brick aggregate binder 5 is disposed at all binder positions, the joints of the refractory bricks are easily broken by gripping the end face of the brick aggregate binder 5 with the hanger 7 There is a problem of Therefore, in the present invention, the integrally formed binder 6 is disposed at the position of the binder held by the hanger 7.

  Therefore, at least two integral molding binders 6 are required for each module block 4. Even if the module block 4 in which three or more integrally formed binders 6 are disposed (for example, the module block 4 in which all the brick aggregate binder 5 in FIG. 2 is replaced with the integrally formed binder 6), the present invention is applied There is no technical problem. However, since the manufacturing cost of the integrally formed binder 6 is larger than that of the brick aggregate binder 5, the integrally formed binder 6 (see FIG. 2) at the position of the binder held by the hanger 7 from the viewpoint of cost reduction of repair work. It is preferable to arrange a total of 2).

  Since the single-piece molding binder 6 is not a collection of firebricks, it has higher strength than the brick collection binder 5. Therefore, the one-piece molding binder 6 is unlikely to collapse even when held by the hanger 7, and the module block 4 can be easily and stably transported to a predetermined position adjacent to the pinion wall 8.

  However, when gripping and releasing by the hanger 7 are repeated, the hanger 7 collides when gripping the integrally formed binder 6 each time, or the hanger 7 is rubbed when lifting the integrally formed binder 6, etc. As a result, the integrally formed binder 6 may be damaged (for example, a defect etc.).

  On the other hand, if the module block 4 transported by the transport equipment from the ground construction site to the coke oven is lifted by a crane and carried into the furnace from the opening of the ceiling as it is, the number of times of gripping and releasing by the hanger 7 It can be reduced. As a result, damage to the integrally formed binder 6 can be suppressed.

That is, when constructing the wall 3 of the combustion chamber adjacent to the pinion wall 8, the module block 4 transported from the ground construction site is lifted from the transportation equipment by the hanger 7, and as it is in the furnace from the opening of the ceiling. It is preferable to carry in.
Thus, the module block 4 can be stacked at a predetermined position adjacent to the pinion wall 8 to construct the wall 3 of the combustion chamber.

  However, since the side wall surface of the pinion wall 8 and the side wall surface of the wall 3 of the combustion chamber are both made of refractory bricks, fine irregularities exist, and a gap is generated between the pinion wall 8 and the wall 3. Since the gap causes the combustion exhaust gas and the unburned fuel gas to leak from the combustion chamber, it is preferable to mix the non-expanded mortar with water and to flow it into the gap.

Next, a hanger that can be suitably used to lift the module block when constructing the combustion chamber by the above method will be described.
FIG. 5 is a perspective view schematically showing an example of a hanger 7 for lifting the module block 4 shown in FIG.

  The main body of the hanger 7 has a first arm 7a and a second arm 7b vertically downward at both ends of one horizontally-arranged beam 7c, and exhibits an inverted U-shape. Although equipment for attaching hooks and wires used when lifting with a crane is attached to the beam 7c, in order to clearly show the hanger 7 and the module block 4 in FIG. The equipment is not shown.

  Of the four side surfaces of the first arm 7a, a plate-like rubber 9a (hereinafter, referred to as an arm rubber plate) is fixed to a surface (hereinafter, referred to as a first side surface) facing the module block 4. Then, when lifting up the module block 4 with a crane, the arm rubber plate 9 a on the first side abuts on the integrally formed binder 6.

  Of the four side surfaces of the second arm 7b, the inner side of the surface facing the module block 4 (hereinafter referred to as the second side surface) is held parallel to the second side surface and has a distance to the second side surface. A push plate 10 which can be freely changed is disposed. Further, a plate-like rubber 9 b (hereinafter, referred to as a pressing plate rubber plate) is fixed to the surface of the pressing plate 10 facing the module block 4 (hereinafter, referred to as the pressing side). Then, when lifting up the module block 4 with a crane, the distance between the second side surface of the second arm 7 b and the pressing side surface of the pressing plate 10 is adjusted, and the pressing plate rubber plate 9 b is in contact with the integrally formed binder 6 Let

  Although the example which arrange | positions the two push boards 10 was shown in FIG. 5, the number of the push boards 10 is not limited in this invention. If the module block 4 to be lifted is small, one push plate 10 may be disposed, and if the module block 4 is large, three or more push plates 10 may be disposed.

  If the distance between the second side surface of the second arm 7b and the pressing side surface of the pressing plate 10 is long (that is, the pressing force acting on the integrally formed binder 6 by the pressing plate 10 is too strong), the integrally formed binder 6 is broken. It will be easier. On the other hand, when the distance between the second side surface of the second arm 7 b and the pressing side surface of the pressing plate 10 is short (ie, the pressing force acting on the integrally formed binder 6 by the pressing plate 10 is too weak), the module block 4 is It becomes easy to fall.

  Therefore, it is necessary to adjust the distance between the second side surface of the second arm 7b and the pushing side surface of the pushing plate 10 and maintain the position properly. Therefore, it is preferable to attach a screw (hereinafter referred to as a push screw) for adjusting the position of the push plate 10 to the second arm 7 b and adjust the pressing force acting on the integrally formed binder 6 via the push screw. .

  By lifting the module block 4 in this manner, it is possible to prevent damage to the integrally formed binder 6.

  After disassembling the wall and ceiling of the combustion chamber adjacent to the pinion wall of the coke oven (6 m high, 34 long long furnaces) and carrying it out of the furnace (step (A) above), 2 Holding the integrally formed binder of the individually arranged module block (see FIG. 2) with the hanger (see FIG. 5), carry it into the furnace (see FIG. 1) and newly add the wall and ceiling adjacent to the pinion wall It was constructed (step (B) above). In the gap between the pinion wall and the wall 3, a non-intumescent mortar was mixed with water and poured. In addition, although a module block changes in shape according to the site | part of the wall and ceiling which are integrated, a total of 50 module blocks were manufactured in the ground floor. This is an invention example.

  On the other hand, conventionally, after the wall is completely disassembled and taken out of the furnace (step (A) above), the worker piles up the refractory bricks to rebuild the wall (step (B) above). It was In the gap between the pinion wall and the wall 3, as in the invention example, a non-intumescent mortar was mixed with water and poured. This is taken as a conventional example.

  When the number of days required for the above process (B) was compared between the invention example and the conventional example, the required number of days M of the invention example was about 1/3 of the required number N of the conventional example. .

DESCRIPTION OF SYMBOLS 1 combustion chamber 2 carbonization chamber 3 wall body 4 module block 5 brick aggregate binder 6 integral molding binder 7 lifting gear
7a 1st arm
7b second arm
7c Beam 8 pinion wall
9a Arm rubber plate
9b Rubber plate for push plate
10 push plate

Claims (3)

  When repairing the wall and ceiling of the combustion chamber adjacent to the pinion wall of the coke oven, the wall and the ceiling are disassembled and carried out of the furnace, and then the module block is carried into the furnace and a new wall In a method of constructing a wall of a combustion chamber, wherein a body is constructed adjacent to the pinion wall, the module block is provided with at least two integrally formed binders integrally formed of a monolithic refractory, and the others are bricks An aggregate binder is disposed, the integrally formed binder is held by a lifting tool, the module block is lifted and carried into the furnace, and subsequently, the module block is stacked by lowering to a position adjacent to the pinion wall. A method of constructing a wall of a combustion chamber adjacent to a pinion wall, comprising:   The method according to claim 1, wherein the module block is carried into the furnace through the opening of the ceiling. The method for constructing a wall of a combustion chamber according to claim 1 or 2, wherein a non-intumescent mortar is mixed with water and poured into a gap between the pinion wall and the module block .

Images