JPH09272869A - Duct structure in coke dry quencher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject duct structure designed to prevent to the utmost coke powder from being intruded into a boiler through further decreasing the gas flow speed in a circulating gas duct by using conventional brick of simple shape. SOLUTION: In this duct structure equipped with an annular duct 12 around a coke cooling tower 10 and radially equipped with plural small flues 13 connected from the inner wall on the lower part of the coke cooling tower 10 to the annular ducat 12 and having a slant passage 14 and a vertical passage 15 from the lower part, the vertical passage 15 is made up of a lower vertical passage 15a radially provided with plural columnar bricks 13a at specified pitches and an upper vertical passage 15b located right above the lower vertical passage 15a and having no columnar brick.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct structure for extracting an inert gas in coke dry fire extinguishing equipment.

[0002]

2. Description of the Related Art A coke dry fire extinguishing system proposed in Japanese Utility Model Laid-Open No. 60-16741 is shown in FIG. 3. The coke dry fire extinguishing system 60 described in the publication is a coke cooling tower 61.
And a boiler 62 connected to the same, charged with red hot coke from the top of the coke cooling tower 61, and a cyclone 64 from the bottom of the coke cooling tower 61 with a circulation fan 63.
The coke cooling tower 61 is supplied with the cooling circulating gas via the
The heat is exchanged between the red hot coke and the cooling circulating gas to extinguish the fire. An annular duct 65 is provided in the upper part of the coke cooling tower 61 so as to surround it, and a small flue 66 communicating with the lower part of the coke cooling tower 61 is appropriately spaced below the annular duct 65. Is provided. As shown in FIGS. 4 (A) and 4 (B), the small flue 66 is enlarged from an inlet passage 68 for the cooling circulating gas rising obliquely from the inner wall 67 of the coke cooling tower 61 and a passage cross section of the inlet passage 68. The vertical passage 69 is provided to reduce the wind speed in the vertical passage 69, prevent the coke dust from rising, and reduce the inflow of the coke powder to the boiler 62.

[0003]

However, in the coke dry fire extinguishing equipment 60 described in the above publication, since the flow path of the cooling circulating gas is expanded in sequence, the structure of a single brick that forms the gas duct becomes complicated. However, there is a problem that the furnace construction period becomes long and the cost becomes high. Also,
Since the brick 70 remains in the structure described in the above publication, there is a limit in expanding the flow path. Further, the brick 70 that branches the small flue 66 has a structure that also supports the inner cylinder 71 of the coke cooling tower 61, but extends to the lower end of the exhaust port 72 of the annular duct 65, and immediately thereafter. Since it flows into the exhaust port 72, there is a problem that coke powder easily flows into the boiler 62. The present invention has been made in view of such circumstances, using a brick of a conventional simple shape, of the coke dry fire extinguishing equipment to further prevent the intrusion of coke powder into the boiler by further slowing the wind speed in the circulating gas duct. It is intended to provide a duct structure.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The duct structure of the coke dry fire extinguishing equipment described is a small flue provided with an annular duct around the coke cooling tower, communicating from the lower inner wall of the coke cooling tower to the annular duct, and having a diagonal passage and a vertical passage from the lower portion. In the duct structure of the coke dry fire extinguishing equipment provided with, the vertical passage,
It is formed by a lower vertical passage provided with a plurality of pillar bricks radially at a predetermined pitch, and an upper vertical passage arranged immediately above the lower vertical passage and having no pillar brick.

The duct structure of the coke dry fire extinguishing equipment according to claim 1 is a duct structure of the coke dry fire extinguishing equipment having a small flue having an oblique passage and a vertical passage, and a plurality of vertical passages are radially arranged at a predetermined pitch. A lower vertical passage provided with pillar bricks of, and arranged directly above the lower vertical passage,
Moreover, since it was formed from the upper vertical passage without pillar bricks, the circulating gas exiting the lower vertical passage with pillar bricks immediately enters the upper vertical passage with a large cross-sectional area and the wind speed becomes about 1/2. Therefore, the rise of the coke powder is extremely reduced, and as a result, the amount of the coke powder conveyed from the annular duct to the boiler side is about 40% of the conventional amount.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. 1 is a sectional view showing a duct structure of coke dry fire extinguishing equipment according to an embodiment of the present invention, and FIG. 2 (A) is a sectional view taken along the line AA in FIG.
FIG. 1B is a sectional view taken along the line BB in FIG.

First, the structure of the coke cooling tower 10 to which the duct structure of the coke dry fire extinguishing equipment according to the embodiment of the present invention is applied will be described. As shown in FIG. 1, the coke cooling tower 10 has a red-hot coke inlet 11 at the top.
And a coke discharge port (not shown) at the lower part, to which a rotary valve is attached. An annular duct 12 is formed in the middle of the coke cooling tower 10
A plurality of small flues 13 are formed from the inside of the lower part of the to the annular duct 12.

Each of the small flues 13 is composed of a lower diagonal passage 14 and an upper vertical passage 15 connected to it.
The vertical passage 15 includes a lower vertical passage 15a and an upper vertical passage 15a.
The diagonal passage 14 and the lower vertical passage 15a.
A pillar brick 13a for partitioning the passage is shown in FIG. 2 (A).
As shown in FIG. 5, a large number of radial lines are provided to support the inner cylinder 16 of the coke cooling tower 10. As shown in FIG. 2 (B), an upper vertical passage 15b without the pillar bricks 13a is provided immediately above the lower vertical passage 15a partitioned by the pillar bricks 13a to increase its cross-sectional area. The wind speed of the circulating gas passing through is reduced.

Thus, the vertical passage 15 is divided into the lower vertical passage 15a and the upper vertical passage 15b, and the upper vertical passage 1 is divided into
By connecting 5b to the annular duct 12, the coke cooling tower 10 can be made of existing bricks without the need for special bricks.
Can be configured. Even if there is a step in the connection between the lower vertical passage 15a and the pillar-free upper vertical passage 15b, the coke powder deposited on the stepped portion falls at a repose angle or more because the annular duct 12 is deep enough. It will be. As described above, the duct structure 10 of the coke dry fire extinguishing equipment is configured to provide the upper vertical passage 15b without pillar bricks, and prevents the coke powder from soaring into the annular duct 12 as much as possible.

Next, the operation of the duct structure 10 of the coke dry fire extinguishing equipment will be described in more detail. The red hot coke 18 is cooled by blowing the cooling circulating gas from the lower part of the coke cooling tower 10 to cool the cooling circulating gas. Flows through the small coke 18, the small duct 13, the annular duct 12, and the exhaust port 17 to the dust remover 19.
Due to the flow of the cooling circulating gas, even if the crushed dust in the coke 18 flies, it can be prevented from being collected by the dust remover 19 and flowing into the boiler.

In this embodiment, an upper vertical passage 15b without pillar bricks is provided directly above the lower vertical passage 15a, and the passage area is doubled as compared with the conventional vertical passage. Therefore, in the upper vertical passage 15b, the gas wind velocity becomes 1/2, and the coke powder flowing into the upper annular duct 12 can be suppressed to 40% of the conventional level. Here, since the amount of coarse powder is reduced, the large dust remover 19 can be omitted. This makes the overall layout of the device very compact.

[0012]

As is apparent from the above description, the duct structure of the coke dry fire extinguishing equipment according to the first aspect is provided with an upper vertical passage without pillar bricks to reduce the flow velocity of the circulating gas entering the annular duct. Therefore, the amount of coke powder that enters the annular duct and is discharged to the outside can be significantly reduced. As a result, the large dust remover mounted on the outlet side of the coke cooling tower can be omitted, resulting in a compact arrangement of the entire apparatus and a large cost reduction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a duct structure of coke dry fire extinguishing equipment according to an embodiment of the present invention.

2A is a sectional view taken along the line AA in FIG. FIG. 1B is a sectional view taken along the line BB in FIG.

FIG. 3 is an explanatory diagram of a coke cooling tower according to a conventional example.

4A and 4B are partial cross-sectional views of a coke cooling tower.

[Explanation of symbols]

10 coke cooling tower 11 coke inlet 12 annular duct 13 small flue 13a pillar brick 14 diagonal passage 15 vertical passage 15a lower vertical passage 15b upper vertical passage 16 inner cylinder 17 exhaust port 18 coke 19 dust remover

Claims (1)

[Claims] 1. A coke dry fire extinguisher equipped with an annular duct around the coke cooling tower, communicating from the inner wall of the lower part of the coke cooling tower to the annular duct, and further having a small flue having an oblique passage and a vertical passage from the lower portion. In the duct structure of equipment, the vertical passage, a lower vertical passage provided with a plurality of pillar bricks radially at a predetermined pitch, and an upper vertical passage arranged directly above the lower vertical passage and having no pillar bricks. A duct structure for coke dry fire extinguishing equipment, characterized by being formed from