JP2006176661A - 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: When red-hot coke is quenched by 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, the distances from the tips of the plurality of the sprinkler nozzles to the upper surface of coke loaded on the quenching car are caused to be equal and the time of sprinkling water from the plurality of sprinkler nozzles is decided on the temperature distribution of the quenched coke on the wharf and, as occasion demands, on the height of the layer of the red-hot coke in the quenching car. <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 sprinkling fire of red-hot coke loaded on a fire extinguisher. The watering control method detected from confirmation is described.

Patent Document 3 relates to a method of sprinkling fired red coke loaded on a fire extinguisher. After the sprinkling treatment, the fire extinguishing is performed by detecting the temperature of the received coke in order to prevent the remaining coke remaining on the warp. A watering control method for automatically controlling the amount of watering is described.
Japanese Patent Application Laid-Open No. 64-40595 JP-A 63-95290 Japanese Patent Laid-Open No. 05-320656

  The technology described in Patent Document 1 is mainly intended to detect unextinguished parts when unfired coke is generated and to completely extinguish fires by re-watering the unfired parts. There is no description of adjustment or 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.

  The technique described in Patent Document 3 adjusts the amount of sprinkling based on the temperature value on the wharf and the change over time of the coke temperature, so that suppression of unfired coke is improved. Is not sufficient to stabilize.

  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,
The distances from the tips of the plurality of water spray nozzles to the upper surface of coke loaded on the fire extinguisher are made equal, and the time of water sprayed from the plurality of water spray nozzles is determined based on the temperature distribution of the fire fighting coke on the wharf Coke wet fire extinguishing method,
2. 2. The coke wet fire extinguishing method according to claim 1, wherein the watering time is determined based on a bed height of the red hot coke in a fire extinguisher and a temperature distribution of the fire coke on the wharf.

3. A fire extinguisher carrying red coke from a coke oven, a fire extinguisher equipped with a sprinkler for spraying fire water on the fire extinguisher and a sprinkler controller for controlling the amount of sprinkling, and a wharf for temporarily placing the coke after extinguishing In the coke wet fire extinguishing equipment having a track laid along the wharf and the fire truck moves,
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. It is attached to the water sprinkling pipe so that the distance to the upper surface of the coke can be adjusted, and the water sprinkling control device determines the water sprinkling condition from the water sprinkling nozzle based on the temperature distribution of the fire extinguishing coke on the wharf. Coke wet fire extinguishing equipment.

  4). 4. The coke wet fire extinguisher according to claim 3, wherein the water sprinkling control device determines the water sprinkling condition based on a bed height of the red hot coke in the fire extinguisher and a temperature distribution of the fire extinguishing coke on the wharf.

  5. 5. The coke wet fire extinguishing device according to 3 or 4, wherein the watering condition controlled by the watering control device is watering time.

  6). The coke according to any one of 3 to 5, wherein the plurality of watering nozzles are set so that the distance between the tip thereof and the upper surface of the coke loaded on the fire extinguisher is equal. Wet 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 according to an embodiment of the present invention. In the figure, 1 is a fire extinguisher, 2 is a fire extinguisher, 2 is a fire extinguisher, and the fire extinguisher 1 is entered. A trajectory on which the fire extinguisher 1 travels, 4 is a wharf that sprinkles fired coke on it and temporarily places it, 5 is coke, 6 is a detector of the temperature distribution of the coke 5 discharged onto the wharf, Reference numeral 7 denotes a detection circuit of the detector 6, and 8 denotes a control device that controls the sprinkling conditions of the fire extinguishing water in the fire extinguishing tower 2 based on a signal from the detection circuit 7.

  In the coke wet fire extinguishing shown in FIG. 1, red hot coke after dry distillation is loaded on a fire extinguisher 1 from a coke oven (not shown), and fire extinguishing water is sprayed on 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.

  The condition for spraying fire water on the fire extinguisher 1 in the fire extinguisher 2 is that the temperature distribution of the coke 5 discharged on the wharf is obtained by the detector 6 and the detection circuit 7, and the fire extinguisher water in the fire extinguisher 2 is sprinkled by the control device 8. Control the conditions.

  In the present invention, when the watering condition is controlled by the control device 8, in addition to the temperature distribution of the coke 5 discharged on the wharf, the bed height of the red hot coke in the fire extinguisher is used for controlling the watering condition. It is also possible.

  In the present invention, the controller 8 controls the water spray density and the water spray time as the water spray conditions so that the temperature distribution of the coke 5 discharged onto the wharf becomes uniform.

  In order to reduce the water content of coke after fire extinguishing, it is effective to increase the water spray density and shorten the water spray time. The water spray density is the upper limit of the allowable limit, and the water spray time is uniform in the temperature distribution of the coke 5. It is particularly effective to control to the shortest.

  Further, on the fire extinguisher 1, the portion where the height of the coke is thick is likely to be insufficiently cooled even if the watering amount density is set as the upper limit of the allowable limit, so the watering time of the watering nozzle 8 immediately above the portion is increased. It is preferable to control as described above.

  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, and shows a state where the fire extinguisher 1 is drawn onto the track 3 in the fire extinguishing tower 2. In the figure, 9 is arranged above the fire extinguisher 1, a watering device for sprinkling fire water, 10 is a watering pipe (main pipe), 11 is a watering pipe (branch pipe) to which a watering nozzle 14 is attached, and 12 is a watering nozzle 14. Is a height adjusting mechanism for moving the slab vertically, 13 is a flow rate adjusting orifice, 14 is a watering nozzle, and 15 is a floor having an inclination angle θ on which coke is loaded in the fire extinguisher 1.

  The watering device 9 is provided with a plurality of watering pipes (to which cooling water is supplied from a watering pipe (main pipe) 10 and attached with a watering nozzle 14 above the fire extinguisher 1 in parallel with the traveling direction of the fire extinguisher). The sprinkling nozzle 14 has a sprinkling pipe (branch) 11 via a height adjustment mechanism 12 so that the distance between the tip of the sprinkling nozzle 14 and the upper surface of the coke loaded on the fire extinguisher can be adjusted. Attached to.

  The amount of water sprayed in each of the water spray nozzles 14 is adjusted by the flow rate adjusting orifice 13. A flow rate adjusting valve may be used instead of the flow rate adjusting orifice 7.

  In the fire extinguisher 1, the coke 5 is loaded in a shape that substantially follows the floor inclination of the inclination angle θ, so that the height adjustment mechanism 12 allows distances h 1, h 2 from the tip of each water spray nozzle to the upper surface of the coke 5, Adjustment is made so that h3 and h4 are equal, and the water spray density 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.

  Depending on the bed height of the coke 5, the amount of water sprayed from each water nozzle is adjusted by the flow rate adjusting orifice 13 or the flow rate control valve, and the uniformity of cooling is further improved by increasing the water level density at the location where the bed height is high. It is preferable.

  In addition, without adjusting the sprinkling amount from each watering nozzle, the distances h1, h2, h3, h4 from the tip of each watering nozzle to the coke 5 can be shortened by using the height adjusting mechanism 12 at a 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.

  Further, in the present invention, the arrangement of the watering nozzles in the traveling direction of the fire truck of the watering pipe (branch pipe) is not particularly defined. However, it is preferable to improve the cooling uniformity by attaching the watering nozzles in adjacent watering pipes. 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.

  Using the fire extinguishing equipment shown in FIG. 1, for fire extinguishing vehicles loaded with red hot coke, a plurality of sprinkling headers are arranged perpendicular to the traveling direction, and the distance from the tip of each sprinkling nozzle to the coke layer surface is made constant. Watering was done. 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. As a comparative example, watering was performed with a constant watering amount from each watering nozzle.

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 50 ° C., whereas in the comparative example, it was about 400 ° C. The water content per unit volume was about 2% in the present invention example and about 8% in the comparative example.

The figure which shows the coke wet fire extinguishing equipment which concerns on one Example of this invention. The figure which shows one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire extinguisher 2 Fire extinguisher 3 Track 4 Wharf 5 Coke 6 Detector 7 Detection circuit 8 Control apparatus 9 Sprinkling apparatus 10 Sprinkling piping (main pipe)
11 Watering pipe (branch pipe)
12 Height adjusting mechanism 13 Flow rate adjusting orifice 14 Sprinkling nozzle 15 Floor

Claims (6)

Inside the fire extinguisher, the red hot 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 above the fire extinguisher and parallel to the traveling direction of the fire extinguisher. Coke wet fire extinguishing method
The distances from the tips of the plurality of water spray nozzles to the upper surface of coke loaded on the fire extinguisher are made equal, and the time of water sprayed from the plurality of water spray nozzles is determined based on the temperature distribution of the fire fighting coke on the wharf Coke wet fire extinguishing method, 2. The coke wet fire extinguishing method according to claim 1, wherein the watering time is determined based on a bed height of the red coke in the fire extinguisher and a temperature distribution of the fire coke on the wharf. A fire extinguisher carrying red coke from a coke oven, a fire extinguisher equipped with a sprinkler for spraying fire water on the fire extinguisher and a sprinkler controller for controlling the amount of sprinkling, and a wharf for temporarily placing the coke after extinguishing In the coke wet fire extinguishing equipment having a track laid along the wharf and the fire truck moves,
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. It is attached to the water sprinkling pipe so that the distance to the upper surface of the coke can be adjusted, and the water sprinkling control device determines the water sprinkling condition from the water sprinkling nozzle based on the temperature distribution of the fire extinguishing coke on the wharf. Coke wet fire extinguishing equipment. 4. The coke wet fire extinguisher according to claim 3, wherein the water sprinkling control device determines the water sprinkling condition based on a bed height of the red hot coke in the fire extinguisher and a temperature distribution of the fire extinguishing coke on the wharf. The coke wet fire extinguishing device according to claim 3 or 4, wherein the watering condition controlled by the watering control device is watering time. The plurality of watering nozzles are set so that the distance between the tip thereof and the upper surface of coke loaded on the fire extinguisher is equal. Coke wet fire extinguishing equipment.

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