JP2006176660A - Coke wet quenching method and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for wet-quenching red-hot coke dry-distilled in a coke oven, and an apparatus therefor. <P>SOLUTION: The method for quenching red-hot coke comprises sprinkling water over a quenching car loaded with red-hot coke from sprinkler nozzles attached to a plurality of sprinkler piping arranged in parallel with the proceeding direction of the quenching car over the quenching car inside a quenching column, where the distances from the tips of the sprinkler nozzles to the upper surface of coke loaded on the quenching car are caused to be equal and, as occasion demands, the amount of water sprinkled from the plurality of sprinkler nozzles are changed according to the height of the layer of the red-hot coke in the quenching car. The apparatus for the quenching method is also provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for extinguishing red hot coke that has been carbonized in a coke oven in a wet manner.

  Methods for extinguishing red hot coke carbonized in a coke oven are roughly classified into wet fire extinguishing and dry fire extinguishing. Wet fire extinguishing is a method in which red hot coke extruded from a coke oven is loaded on a fire extinguisher and transported to a fire extinguisher, and water is sprinkled to extinguish it. In dry fire extinguishing, extinguishing is performed using an inert gas such as nitrogen.

  Dry fire extinguishment is capable of recovering sensible heat from red hot coke and is often used in recent years as an energy-saving measure. However, since complex equipment is required, wet fire extinguishing is still being used with improvement.

  In the case of wet fire extinguishing, coke extinguished by sprinkling is placed on the temporary wharf wharf and transported to the blast furnace by a belt conveyor as necessary. In some cases, it was sufficient, or red hot coke partially remained on the watering wharf, resulting in burning of the belt conveyor and deterioration of coke quality.

  Patent Document 1 relates to an automatic red-fired coke extinguishing facility, and describes an automatic facility that measures the temperature of the coke deposit surface on the wharf and, when detecting the red-hot portion, sprinkles water from a sprinkler mounted on the carriage to extinguish the fire. .

Patent Document 2 relates to water-fire extinguishing of red-hot coke loaded on a fire extinguisher, in order to prevent the occurrence of unfired coke due to insufficient water spray, the shortage of water spray is determined by opening and closing the water spray valve, water level change in the storage tank, and pumping volume. The watering control method detected from confirmation is described.
Japanese Patent Application Laid-Open No. 64-40595 JP-A 63-95290

  The technology described in Patent Document 1 is mainly intended to detect an unextinguished portion when unfired coke is generated and to completely extinguish the fire by re-watering the unfired portion. There is no mention of adjustment and prevention of unfired coke in advance.

  Moreover, although the technique of patent document 2 suppresses generation | occurrence | production of unfired coke, adjustment of coke containing water | moisture content is made into a subject.

  Accordingly, an object of the present invention is to provide a coke wet fire extinguishing method capable of both avoiding generation of an unfired portion and reducing moisture content in the coke after extinguishing.

The object of the present invention can be achieved by the following means.
1. Inside the fire extinguisher, the red coke is extinguished by sprinkling water into the fire extinguisher equipped with red hot coke from multiple water spray nozzles attached to multiple sprinkling pipes arranged in parallel with the traveling direction of the fire extinguisher. In the coke wet fire extinguishing method,
A coke wet fire extinguishing method, characterized in that a distance from tips of the plurality of water spray nozzles to an upper surface of coke loaded on the fire extinguisher is constant.
2. 2. The coke wet fire extinguishing method according to claim 1, further comprising changing the amount of water sprayed from the plurality of water spray nozzles in accordance with a layer height of the red hot coke in the fire extinguisher.
3. A fire extinguisher carrying red coke from a coke oven, a fire extinguisher equipped with a sprinkler for spraying fire water to the fire extinguisher, a wharf for temporarily placing the coke after extinguishing, and laying along the wharf In the coke wet fire extinguishing equipment having the track where the fire extinguisher is moved,
The watering device has a plurality of watering pipes attached with watering nozzles in parallel with the traveling direction above the fire extinguisher, and the watering nozzles are loaded on the extremity and the fire extinguisher. Coke wet fire extinguishing device, characterized in that it is attached to the water sprinkling pipe so that the distance to the upper surface of the coke can be adjusted.
4). 4. The coke wet fire extinguishing apparatus according to claim 3, wherein the amount of water sprayed from the plurality of water spray nozzles is changed in accordance with the layer height of the red hot coke in the fire extinguisher.

  According to the present invention, it is possible to reliably perform wet fire extinguishing of coke, and it is possible to reduce the load on the operation of the blast furnace, such as less moisture content after the fire extinguishment, increase in input heat amount and deterioration of air permeability in the blast furnace due to increased adhering fine powder. It is.

  The present invention is characterized in that fire extinguishing conditions such as the amount of fire extinguishing water and the height of a sprinkling header are adjusted according to the loading state of unfired (red hot) coke in a fire extinguisher.

  FIG. 1 is a schematic diagram for explaining an example of a coke wet fire extinguishing equipment to which the present invention is applied. In the figure, 1 is a fire extinguisher, 2 is a fire extinguisher with watering equipment, and the fire extinguisher 1 enters, 3 is a fire extinguisher 1 A trajectory on which 4 moves, 4 is a wharf for spreading fire extinguishing coke on it and temporarily placing it, and 5 is coke.

  In coke wet fire extinguishing, red hot coke after dry distillation is loaded onto a fire extinguisher 1 from a coke oven (not shown), and fire extinguishing water is sprayed onto the fire extinguisher 1 in a fire extinguisher 2. After that, the fire extinguisher 1 is moved on the track 3 arranged along the wharf 4, and the fired coke 5 is discharged onto the wharf 4 at a predetermined position.

  FIG. 2 is a schematic diagram for explaining the internal structure of the fire extinguishing tower 2 in the coke wet fire extinguishing equipment according to one embodiment of the present invention. The fire extinguisher 1 is drawn into the track 3 in the fire extinguishing tower 2. This is observed and shown from the direction of travel. In the figure, 6 is disposed above the fire extinguisher 1 and sprays water for extinguishing the fire water, 7 is a flow rate adjusting orifice, 8 is a water spray nozzle, 9 is a height adjusting mechanism for moving the water spray nozzle in the vertical direction, 10 Is a watering pipe (main pipe), 11 is a watering pipe (branch pipe) to which the watering nozzle 8 is attached, and 12 is a floor having an inclination angle θ on which coke is loaded in the fire extinguisher 1.

  The watering device 6 is provided with a plurality of watering pipes (with watering nozzles 8) to which cooling water is supplied from a watering pipe (main pipe) 10 in parallel with the traveling direction of the fire extinguisher 1 above the fire extinguisher 1. The sprinkling nozzle 8 is attached to the sprinkling pipe 11 via a height adjusting mechanism 9 so that the distance between the tip and the upper surface of the coke loaded on the fire extinguisher can be adjusted. .

  The amount of water sprayed in each of the water spray nozzles 8 is adjusted by the flow rate adjusting orifice 7. A flow rate adjusting valve may be used instead of the flow rate adjusting orifice 7.

  Since the coke 5 is loaded in the fire extinguisher 1 in a shape that substantially follows the floor inclination of the inclination angle θ, the height adjustment mechanism 9 allows distances h1, h2, h3 and h4 are adjusted to be equal to each other, and the water spray density under each water spray nozzle is made equal to perform uniform cooling.

  A plurality of sprinkling pipes (branch pipes) 11 are arranged in parallel along the traveling direction of the fire extinguisher 1 (four in FIG. 1), and a plurality of sprinkling nozzles 8 are respectively attached in the traveling direction. The distance from the water spray nozzle tip to the upper surface of the coke 5 is made equal.

  Furthermore, according to the bed height of the coke 5, the water spray amount from each water nozzle is adjusted by the flow rate adjusting orifice 7 or the flow rate control valve, and if the water spray density at the high layer height is increased, the cooling uniformity is improved. It is preferable to improve.

  In addition, without adjusting the amount of water sprayed from each watering nozzle, the distances h1, h2, h3, and h4 from the tip of each watering nozzle to the coke 5 are shortened by using the height adjusting mechanism 9 for the portion where the layer height of the coke 5 is high. It is possible to improve the cooling uniformity by adjusting so as to be.

  The upper surface shape and layer height of the coke 5 on the floor 12 in the fire extinguisher 1 can be obtained by sufficiently cooling the coke in a loaded state and actually measuring the layer height below each sprinkling pipe 11. The measurement method is not specified.

  Furthermore, in this invention, the arrangement | positioning of the watering nozzle in the advancing direction of the fire extinguisher of a watering pipe (branch pipe) is not prescribed | regulated in particular. It is preferable that the adjacent sprinkling pipes are attached in a zigzag manner because the cooling uniformity is improved. When the high temperature portion of the coke loaded on the fire extinguisher 1 can be grasped in advance, the fire extinguishing nozzles may be arranged at high density at the corresponding portions.

  The fire extinguisher shown in FIG. 1 is used to install a coke from the tip of each sprinkling nozzle from a sprinkling nozzle attached to a plurality of sprinkling pipes arranged in parallel along the traveling direction of the fire extinguisher loaded with red hot coke. Watering was carried out at equal distances to the layer surface.

  The amount of water sprayed from each watering nozzle was changed according to the height of the coke layer, and increased as the layer height increased. The comparative example did not consider the height of the coke loaded on the fire extinguisher, and kept the height of each watering nozzle from the ground surface constant, and changed the amount of watering according to the height of the coke.

As a result, in the example of the present invention, the temperature fluctuation of the coke discharged on the wharf was in the range of about 100 ° C., whereas in the comparative example, it was about 400 ° C. In addition, the moisture content per unit volume was 3% in the present invention example, and the variation in temperature was large in the comparative example.

The figure which shows one Example of this invention. The figure which shows an example of a coke wet fire extinguishing equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire extinguisher 2 Fire extinguisher 3 Track 4 Wharf 5 Coke 6 Sprinkling device 7 Flow rate adjusting orifice 8 Sprinkling nozzle 9 Height adjusting mechanism 10 Sprinkling piping (main pipe)
11 Watering pipe (branch pipe)
12 floors

Claims (4)

Inside the fire extinguisher, the red coke is extinguished by sprinkling water into the fire extinguisher equipped with red hot coke from multiple water spray nozzles attached to multiple sprinkling pipes arranged in parallel with the traveling direction of the fire extinguisher. In the coke wet fire extinguishing method,
A coke wet fire extinguishing method, wherein distances from tips of the plurality of water spray nozzles to an upper surface of coke loaded on the fire extinguisher are made equal. 2. The coke wet fire extinguishing method according to claim 1, further comprising changing the amount of water sprayed from the plurality of water spray nozzles according to the bed height of the red hot coke in the fire extinguisher. A fire extinguisher carrying red coke from a coke oven, a fire extinguisher equipped with a sprinkler for spraying fire water to the fire extinguisher, a wharf for temporarily placing the coke after extinguishing, and laying along the wharf In the coke wet fire extinguishing equipment having the track where the fire extinguisher is moved,
The watering device has a plurality of watering pipes attached with watering nozzles in parallel with the traveling direction above the fire extinguisher, and the watering nozzles are loaded on the extremity and the fire extinguisher. Coke wet fire extinguishing device, characterized in that it is attached to the water sprinkling pipe so that the distance to the upper surface of the coke can be adjusted. 4. The coke wet fire extinguishing apparatus according to claim 3, wherein the amount of water sprayed from the plurality of water spray nozzles is changed in accordance with a layer height of the red hot coke in the fire extinguisher.

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