JPH02425Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a base structure of a riser pipe for leading coke oven gas generated from a coke oven carbonization chamber to a collecting main pipe.

Conventional technology A coke oven is a structure made of bricks piled up precisely, and a number of carbonization chambers are arranged side by side in a sandwich-like manner between combustion chambers, and the coal that is sequentially charged into the carbonization chambers is Carbonization is carried out by obtaining heat from combustion chambers provided on both sides of the carbonization chamber. The high-temperature coke oven gas generated in each carbonization chamber rises inside each carbonization chamber and is led to the collecting main pipe from the riser pipe that hangs down from the top of the furnace. cooled down.

The riser pipe has a structure in which refractory bricks are pasted on the inner surface of a cylindrical steel shell, and a flange is formed at the lower end of the steel shell. This riser pipe is suspended over the base brick at the upper end of the carbonization chamber, and a base sleeve is wrapped around the base of the riser pipe, and the weight of the riser pipe is supported by the abutment of the flange against the topmost base brick. There is. In addition, the joint between the topmost base brick and the lining brick at the lower end of the riser pipe suspended above it is made of refractory mortar.

FIG. 3 is an enlarged sectional view showing the base structure of such a conventional riser pipe.

1 is a carbonization chamber, 2 is a base brick stacked at the upper end of the carbonization chamber 1, and 2a is the topmost base brick among the base bricks 2.

3 is a rising pipe; 4 is a steel skin of the rising pipe 3; 4a is a flange formed at the lower end of the steel skin 4;
5 is a refractory brick pasted on the inner surface of the iron skin 4, and a heat insulating mortar 6 is interposed between the iron skin 4 and the inner brick 5.

Reference numeral 7 denotes a joint that fills the gap between the uppermost base brick 2a and the inner lining brick 5 and flange 4a of the riser pipe 3.

A base sleeve 8 encloses the base of the ascending pipe 3, and serves to prevent the rising pipe 3 from shifting laterally.

In addition, 9 is a part of the furnace top brick which also serves as the upper cover of the cross tie rod groove at the top of the furnace, and 10 is a cross tie rod for tightening the furnace body in the furnace length direction. The space Sa is usually filled with mortar, and the space Sb is usually filled with asbestos yarn and further sealed with mortar. L is the furnace top level.

Problems that the invention aims to solve: The carbonization chamber is lined with bricks up to the top of the oven, and the inner surface of the riser pipe that hangs down from the top of the oven is also lined with bricks, so the high-temperature coke oven gas is The ascent was carried out inside a chamber or tube surrounded by bricks, but the bricks at the base of the top tier, from which the ascending pipes hung vertically, were bound to melt and fail within a few years. As a result, there were problems in that the cost of transshipment work was heavy and productivity decreased as a result of the work.

Therefore, the inventor of the present invention attempted to change the fire resistance of the base brick from SK-30 to SK-37 in order to prevent damage, but this did not effectively prevent the occurrence of damage. .

A joint 7 made of refractory mortar is filled between the uppermost base brick 2a and the lining brick 5 of the rising pipe 3 suspended above it, but since a bending force acts on the rising pipe 3. , cracks and gaps are likely to occur in this joint 7.

The inventor of the present invention has investigated the cause of the above-mentioned melting damage of the uppermost base brick, and found that in the past, as shown in FIG. A joint 7 that fills the space between the lining brick 5 of the pipe 3 and the flange 4a at the lower end of the steel skin 4
Since the joint was a straight line, flame passed through the cracks and gaps created in the joint, causing damage to the flange 4a, and furthermore, due to changes in the material caused by the damage, the base of the top tier was damaged. It turned out that this had caused brick 2a to melt.

The purpose of this invention is to provide a base structure for a coke oven riser pipe that is unlikely to cause melting damage to the metal parts or melting damage to the base bricks even if cracks or gaps occur in the joints 7. It is.

Means for Solving the Problems The base structure of the coke oven riser pipe of the present invention is such that the outer circumferential side of the uppermost base brick 2a of the carbonization chamber 1 base brick 2 from which the coke oven riser pipe 3 hangs is lower than the inner circumferential side. It is formed into a stepped structure so as to be higher, and the inner lining brick 5 of the iron skin 4 and the lining brick 5 of the riser pipe 3 is formed on the inner peripheral side which is the lower step.
Butt the bottom edges of the top base brick 2a together.
The joint 7 that fills the space between the and the inner brick 5 is formed into a non-through joint state, and the outer periphery of the base of the riser pipe 3 is surrounded by a base sleeve 8, and furthermore, the iron skin 4 that constitutes the outer skin of the riser pipe 3 is formed. of,
The present invention is characterized in that the weight of the riser pipe 3 is supported by the base sleeve 8 by contacting the base sleeve 8 directly or via the short pipe 11.

In the present invention, when compared with the base structure of a conventional coke oven riser tube, the above two new ideas are added.

In the above, the lower end of the inner lining brick 5 is butted against the inner circumferential side of the lowermost base brick 2a formed in the step structure [not the lower ends of both the iron skin 4 and the inner lining brick 5] The lower ends of the lining bricks 5 are butted against each other, and a joint 7 filling the space between the uppermost base brick 2a and the lining brick 5 is formed into a non-through joint.

By applying the above-mentioned measures, the base sleeve 8 is also provided with the above-mentioned measures that have not been seen in the past.

In this invention, since we added the above-mentioned ideas,
We succeeded in preventing the metal parts at the bottom of the riser pipe 3 from melting and the base brick from melting over a long period of time.

Function The uppermost base brick 2a exhibits the function of reliably blocking the flame from reaching the metal part through the cracks and gaps generated in the joint 7 due to its stepped structure. Furthermore, the base sleeve 8 serves to prevent the riser pipe 3 from shifting laterally and to support its weight.

EXAMPLES Next, the present invention will be explained in more detail with reference to examples.

FIG. 1 is an overall view schematically showing the structure of the riser.

1 is the carbonization chamber, 2 is the base brick, 3 is the riser pipe, 4 is the iron skin of the riser pipe 3, 5 is the inner wall brick made of refractory brick pasted on the inner surface of the steel skin 4, 12 is the riser pipe bend , 13 is a collecting main pipe.

The high-temperature coke oven gas rising from the carbonization chamber 1 further rises in the riser pipe 3, is primarily cooled by being sprayed with water in the riser pipe bend 12, and is guided to the collecting main pipe 13 together with cooling water.

FIG. 2 is an enlarged sectional view showing the base structure of the riser pipe in FIG. 1.

Similar to FIG. 3 showing the prior art, 1 is a carbonization chamber, 2 is a base brick, 3 is a riser pipe, 4 is an iron skin, and 5 is a refractory brick. 6 is an insulating mortar, 9 is a brick, 10 is a cross tie rod, Sa is a space filled with mortar, Sb is a space filled with asbestos yarn and further sealed with mortar, and L is the furnace top level. Note that 14 is a rib.

In FIG. 2, 2a is the uppermost base brick of the base bricks 2. The uppermost base brick 2a is formed in a step structure so that its outer circumferential side is higher than its inner circumferential side, and the iron skin 4 of the riser pipe 3 and the inner lining brick 5 are arranged on the inner circumferential side which is the lower step. The lower ends of the lining bricks 5 are butted against each other, and a joint 7 that fills the gap between the uppermost base brick 2a and the lining brick 5 is formed as a non-through joint.

Therefore, even if a crack or gap occurs in the joint 7, the flame will be blocked by the step of the uppermost base brick 2a and will hardly reach the steel skin 4 and other metal parts, so there will be no damage to the metal parts. Furthermore, the material change of the brick to a low-melting material due to the melting damage is also prevented, and the melting damage of the uppermost base brick 2a is also avoided.

Since the shape of the uppermost base brick 2a has been changed in this way, the structure of the ground sleeve 8 has also been changed as follows.

That is, the position of the flange 4a of the iron skin 4 of the riser pipe 3 is changed to a position slightly higher than the lower end of the riser pipe 3,
A short pipe 11 is connected to the base sleeve 8. In this case, the short pipe 11 may be omitted and the flange 4a of the steel shell 4 may be directly supported by the base sleeve 8. In either case, base sleeve 8
not only prevents the riser pipe 3 from shifting laterally, but also plays a role of supporting the weight of the riser pipe 3.

Embodiment Since the present invention is made as described above, the melting damage of the metal part and furthermore the melting damage of the base brick is effectively prevented over a long period of time, and as a result, the life of the riser pipe is significantly extended, and The frequency of reloading the base bricks will be significantly reduced, and the number of empty kilns during reloading will also be reduced accordingly.

Therefore, the costs required for transshipment work and the decrease in productivity associated with the work are significantly reduced.
This invention has great industrial significance.

[Brief explanation of the drawing]

FIG. 1 is an overall view schematically showing the structure of the riser pipe, and FIG. 2 is an enlarged sectional view showing the base structure of the riser pipe of the present invention. FIG. 3 is an enlarged sectional view showing the base structure of a conventional riser pipe. 1... Carbonization chamber, 2... Base brick, 2a... Uppermost base brick, 3... Rising pipe, 4... Steel skin, 4a...
...Flange, 5...Rising pipe lining refractory brick, 6
... Insulating mortar, 7 ... Joint, 8 ... Base sleeve, 9 ... Furnace top brick, 10 ... Cross tie rod, 11 ... Short pipe, 12 ... Riser pipe bend,
13...Collecting main pipe, 14...Rib, Sa, Sb...Space, L...Furnace top level.

Claims (1)

[Scope of utility model registration request] The uppermost base brick 2a of the base brick 2 of the coking chamber 1 in which the coke oven riser pipe 3 is vertically formed is formed into a stepped structure such that the outer circumferential side thereof is higher than the inner circumferential side, and on the inner circumferential side which is the lower step, Rising pipe 3 iron skin 4
Then, the lower ends of the inner-lined bricks 5 of the inner-lined bricks 5 are butted together to form a joint 7 that fills the space between the uppermost base brick 2a and the inner-lined brick 5 in a non-through state, and the rising pipe The outer periphery of the base of 3 is wrapped in a base sleeve 8, and the iron skin 4 constituting the outer skin of the riser pipe 3 is wrapped directly with the base sleeve 8 or with the short pipe 11.
A base structure of a coke oven riser pipe, characterized in that the weight of the riser pipe 3 is supported by the base sleeve 8 by contacting the riser pipe 3 through the base sleeve 8.