JPH10168458A - Coke dry quenching apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a coke dry quenching apparatus which is sufficiently safe and reliably against phreatic explosion, has a stable structure strong enough against earthquake, and can decrease high/priced refractories, and dispense with a dust collector. SOLUTION: An annular duct 4 which has ventholes 11 formed at some intervals and communicating with an insular venthole 10 formed at the intermediate section between a cooling chamber 1a and a preliminary chamber 2 is installed around the periphery of the preliminary chamber 2 to cause the outside steel wall 4b of the duct 4 and the outside steel wall of the chamber 2 to form a cooling channel 12. Spontaneously cooled gas channeled communicating with the cooling channel 12 are formed at some internals at the lower part of the duct 4. The duct 4 is fixed between the lower fixing member 14 and an upper fixing member 15, and the gas discharge port of the dust 4 is directly connected to the discharged gas inlet port of a boiler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coke dry cooling apparatus having a spare chamber for extinguishing and cooling red hot coke discharged from a coke oven with a cooling gas and a cooling chamber.

[0002]

2. Description of the Related Art FIG. 6 is a longitudinal sectional view of a conventional coke dry cooling apparatus. In a coke dry cooling apparatus 1, a preliminary chamber 2 is provided above a cooling chamber 1a, and the preliminary chamber 2 is a water cooling wall 3 having a cylindrical structure. The cooling chamber 1a and the water cooling wall 3 of the preliminary chamber 2 form an annular duct 4, and the outer wall of the annular duct 4 is made of a refractory wall 4a and steel. It is composed of a wall 4b. The annular duct 4 is connected to a boiler 5. The cooling gas supplied from the cooling gas supply pipe 6 at the lower part of the cooling chamber 1 is exchanged with red-hot coke, introduced into the boiler 5 through the annular duct 4, and recovered in heat (see Japanese Utility Model Laid-Open No. 63-50853).

FIG. 7 is a longitudinal sectional view of another coke dry cooling apparatus described in the above-mentioned publication, and a preliminary chamber 2 is formed on the upper part of a cooling chamber 1a by an inner peripheral wall 2a made of a refractory material.
A plurality of gas vents 7 for extracting the cooling gas are arranged in an annular shape in an intermediate portion between the gas and the preliminary chamber 2, and an annular duct 4 made of a fire-resistant wall communicating with the gas vent 7 is provided in an outer peripheral portion of the preliminary chamber 2. A coke dry cooling device in which exhaust gas from a duct 4 is introduced into a boiler 9 through a dust remover 8 is described.

[0004]

The coke dry-cooling apparatus 1 in which the preparatory chamber 2 is constituted by a water-cooling wall 3 has a water vapor explosion when water leaks from the water-cooling wall 3 in a high-temperature atmosphere of about 1000 ° C. Is likely to cause serious damage to the coke dry cooling device 1 and stop the operation. As a method of preventing this, control by water leak detection means can be considered, but the accuracy of water leak detection is poor, so it cannot be a reliable prevention means. In addition, since only the upper part of the water cooling wall 3 is suspended from the upper part of the coke dry cooling device 1, there is a problem that it is structurally vulnerable to an earthquake.

Further, in the coke dry cooling device 1 in which the preparatory chamber 2 is formed by the refractory brick wall 2a, since it is necessary to use a large amount of expensive refractory and to dispose the dust remover 8, the equipment becomes large. In addition, there is a disadvantage that equipment costs are increased.

[0006] The present invention provides a coke dry cooling system that ensures sufficient safety and reliability against steam explosion, has a structure that is strong against earthquakes, can reduce expensive refractories, and can omit a dust remover. To provide.

[0007]

According to the present invention, there is provided a coke dry cooling apparatus having a preliminary chamber above a cooling chamber, wherein an annular gas vent for extracting a cooling gas is provided at an intermediate portion between the cooling chamber and the preliminary chamber, An annular duct is provided around the outer periphery of the spare chamber, where a plurality of gas vents communicating with the annular gas vent are provided at intervals.The annular duct is made of a fire-resistant brick structure wall and a steel wall outside. A cooling passage is formed by the steel wall outside the annular duct and the steel wall outside the preliminary chamber, and a plurality of natural cooling gas passages communicating with the cooling passage are provided at intervals below the annular duct. The annular duct is fixed between a lower fixing member disposed between the gas vents in the upper part of the cooling chamber and an upper fixing member provided in the upper part of the preliminary chamber. The exhaust gas outlet of the annular duct is connected directly to the exhaust gas inlet of the boiler.

[0008]

1 is a longitudinal sectional view of a coke dry cooling device according to the present invention.
A preliminary chamber 2 is formed in the upper part of a. The preliminary chamber 2 has a refractory brick wall 2a on the inside and a steel wall 2b on the outside.

An intermediate portion between the cooling chamber 1a and the preparatory chamber 2 is provided with an annular gas vent 10 formed as an entire space without columns or the like for extracting the cooling gas.

On the outer periphery of the preliminary chamber 2, there is disposed an annular duct 4 having a plurality of gas vents 11 communicating with the annular gas vent 10 at intervals. The annular duct 4 has a refractory brick structure wall 4a on the inside and a steel wall 4b on the outside. A cooling passage 12 through which the steel wall 4b of the annular duct 4 and the steel wall 2b of the preparatory chamber 2 allow the air to flow at an interval.
A plurality of natural cooling gas passages 13 communicating with the cooling passage 12 for allowing the air to flow into the cooling passage 12 are provided below the annular duct 4 at intervals.

A lower fixing member 14 is arranged circumferentially between the gas vents 12 in the upper part of the cooling chamber 1 a, and its end is fixed to a steel wall 2 b of the preliminary chamber 2. Is provided with an upper fixing member 15 in a circumferential shape.
Are fixed at a plurality of locations circumferentially at two locations above and below the structure.

With the above configuration, the steel wall 2b of the preliminary chamber 2
And the steel wall 4b of the annular duct 4 are open to the atmosphere. Since the natural cooling gas passage 13 is formed between the lower fixing members of the annular duct 4, the air on the atmospheric side is free from the natural cooling gas passage. 13, the steel walls can be naturally cooled by ascending from below through the cooling passages formed between the steel walls 2 b, 4 b of the preliminary chamber 2 and the annular duct 4.

Further, since the opening area of the annular gas vent 10 can be made large, the flow velocity of gas passing therethrough can be reduced, so that the amount of coke scattered decreases.
In particular, it is possible to reduce large dust which has an effect on boiler wear, and as a result of reducing the coke dust content in the gas, the exhaust gas outlet of the annular duct 4 can be directly connected to the exhaust gas inlet of the boiler without interposing a dust remover. . Thereby, the distance between the spare room and the boiler can be shortened by about 10 m.

[0014]

【The invention's effect】

1) Since air passes through the cooling passage formed between the annular duct and the spare chamber, the steel walls are naturally cooled, and no cooling water is used. A cooling device is obtained.

2) Since the amount of expensive refractory used can be reduced and the dust remover in front of the boiler can be omitted, the construction cost can be reduced.

3) Since the spare room, the annular duct, and the fixing member are all naturally cooled, they can be safely cooled by the atmosphere.

4) Since the lower fixing member is connected to the steel wall of each of the annular duct and the preparatory chamber, it is possible to prevent a lateral displacement due to an earthquake or the like.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a coke dry cooling device of the present invention.

FIG. 2 is a partially enlarged view taken along the line AA of FIG. 1;

FIG. 3 is a partially enlarged view as viewed in the direction of arrows CC in FIG. 2;

FIG. 4 is a partially enlarged view as viewed in the direction of arrows BB in FIG. 2;

FIG. 5 is a partially enlarged view as seen in the direction of arrows D-D in FIG. 4;

FIG. 6 is a longitudinal sectional view of a conventional coke dry cooling device.

FIG. 7 is a longitudinal sectional view of another conventional coke dry cooling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coke dry cooling apparatus 1a Cooling room 2 Preparatory room 2a Fireproof brick wall 2b Steel wall 3 Water cooling wall 4 Annular duct 4a Fireproof brick structure wall 4b Steel wall 5 Boiler 6 Cooling gas supply pipe 7 Gas vent 8 Deduster 9 Boiler DESCRIPTION OF SYMBOLS 10 Annular gas vent 11 Gas vent 12 Cooling passage 13 Natural cooling gas passage 14 Lower fixing member 15 Upper fixing member

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Michio Tabata 46-59, Nakahara, Toba-ku, Kitakyushu-shi Nippon Steel Corporation Machinery & Plant Division (72) Inventor, Hideo Yoshida 46-59, Nakahara, Toba-ku, Kitakyushu Nippon Steel Plant Design Co., Ltd.

Claims (2)

[Claims] 1. A coke dry cooling apparatus having a spare chamber above a cooling chamber, wherein an annular gas vent for extracting a cooling gas is provided at an intermediate portion between the cooling chamber and the spare chamber, and an annular gas vent is provided on an outer periphery of the spare chamber. An annular duct in which a plurality of gas vents communicating with the mouth are provided at intervals is arranged, and a cooling passage is formed by a steel wall outside the annular duct and a steel wall outside the preliminary chamber, and an annular duct is formed. At the lower part of the duct, a plurality of natural cooling gas passages communicating with the cooling passage are provided at intervals, and an annular duct is connected to a lower fixing member circumferentially arranged between each gas vent at the upper part of the cooling chamber and a spare. A coke dry cooling device fixed between an upper fixing member provided circumferentially at an upper portion of a chamber. 2. The coke dry cooling device according to claim 1, wherein the exhaust gas outlet of the annular duct is directly connected to the exhaust gas inlet of the boiler.