JP2017014469A - Operation method of coke dry fire extinguishment facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation method of a coke dry type fire extinguishment facility capable of improving a utilization rate of a facility.SOLUTION: A red-hot coke 32 extruded from a coke oven 41 is received in a bucket 31 in which temperature of an inner wall face is equal to or less than 400°C. It is preferable that the bucket 31 of a coke dry type fire extinguishment facility is cooled so that the temperature of the bucket inner wall face becomes equal to or less than 400°C, before the red-hot coke 32 is extruded from the coke oven 41, then the red-hot coke is received in the bucket.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for operating a coke dry-type fire extinguishing equipment, which is used to cool red hot coke extruded after being carbonized in a coke oven.

  In the coke oven, coal is dry-distilled by being heated while shutting off air. The coal after carbonization is extruded from the coke oven as hot red hot coke. When the extruded red hot coke is cooled by sprinkling cooling, the water used for cooling becomes water vapor and is diffused into the atmosphere, and coke powder particles are scattered in the atmosphere. In order to solve these problems, a coke dry fire extinguishing equipment (Coke Dry Quencher: CDQ) is used in which reddish coke is cooled using an inert gas instead of water in a closed system.

  The coke dry fire extinguishing equipment generates a steam for heat generation from a high-temperature inert gas recovered by heat in the cooling chamber and a cooling tower in which a pre-chamber and a cooling chamber are arranged above and below, and cools the inert gas. The boiler that feeds the cooled inert gas to the cooling chamber and the red hot coke extruded from the coke oven are received and transported to the pre chamber, and the red hot coke is put into the cooling tower from the top of the pre chamber. A bucket is generally configured (see, for example, Patent Document 1). The bucket after the red hot coke is put into the cooling tower returns again to the position where the red hot coke pushed out from the coke oven is received, and prepares for the next kiking of the coke oven.

JP-A-61-51085

  In the above-described coke dry fire extinguishing equipment, when operation is performed using a bucket, when discharging red hot coke from the bucket to the cooling tower, the red hot coke may stick to the inside of the bucket and the red hot coke cannot be input into the cooling tower. there were. In this case, until all the coke stuck inside the bucket is dropped from the bucket, red coke in the next kiln cannot be received, and there is a problem that the operation of the coke dry fire extinguishing equipment is stopped.

  An object of the present invention is to propose a method for operating a coke dry fire extinguishing facility that can improve the operating rate of the facility.

  As a result of diligent research to solve the above-mentioned problems of the prior art and realize the above-mentioned object, the inventors have developed a new method for operating a coke dry fire extinguishing system described below. . That is, the present invention is a method for operating a coke dry fire extinguishing facility, characterized in that reddish coke extruded from a coke oven is received in a bucket having an inner wall surface temperature of 400 ° C. or less.

In the operation method of the coke dry fire extinguishing equipment according to the present invention configured as described above,
(1) The bucket of the coke dry fire extinguishing equipment is cooled to a temperature of 400 ° C. or less before the red hot coke is extruded from the coke oven, and then the red hot coke is received by the bucket.
(2) The temperature of the inner wall surface is 350 ° C. or lower,
(3) The inner wall surface is cooled by watering with a water spray for 10 to 30 seconds, depending on the temperature of the bucket inner wall surface before receiving the red hot coke.
(4) The bucket inner wall surface is a bucket diameter-reduced portion at the bottom of the bucket,
Is considered to be a more preferable solution.

  According to the operation method of the coke dry fire extinguishing equipment of the present invention, the bucket before extruding red hot coke from the coke oven has its inner wall surface cooled to 400 ° C. or lower, so when receiving red hot coke in the bucket Moreover, sticking of coke to the bucket inner wall surface can be suppressed. Moreover, according to this invention, the time which removes sticking is shortened, As a result, the operation rate of a coke dry fire extinguishing equipment is improved.

(A)-(d) is a figure for demonstrating each process of the operating method of the coke dry-type fire extinguishing equipment used as the object of this invention, respectively. (A), (b) is a figure for demonstrating an example of the bucket in a coke dry-type fire extinguishing equipment, respectively. (A), (b) is a figure for demonstrating the subject of the bucket in a coke dry-type fire extinguishing equipment, respectively. (A), (b) is a figure for demonstrating the characteristic of the coke dry fire extinguishing equipment of this invention, respectively. (A), (b) is the photograph of the thermoviewer of the bucket inner wall before bucket cooling and after bucket cooling, respectively. It is a graph which shows the relationship between the bucket inner wall temperature in an Example, and the amount of sticking of the red hot coke to the bucket inner wall. It is a graph explaining the change of the sticking rate of the red hot coke to the bucket inner wall which changes with the presence or absence of water cooling in an Example.

  FIGS. 1A to 1D are diagrams for explaining each step of the operation method of the coke dry fire extinguishing equipment according to the present invention. In the example shown in FIGS. 1A to 1D, the coke dry fire extinguishing equipment 1 is basically composed of a cooling tower 11 and a boiler 21 in which a pre-chamber 12 and a cooling chamber 13 are arranged vertically. ing. In the boiler 21, steam is generated from the high-temperature inert gas recovered from the upper part of the cooling chamber 13 via the pipe line 22, and the cooled inert gas is supplied to the cooling chamber 13 via the pipe line 23. It is sent to the bottom. On the other hand, the red hot coke 32 pushed out from the coke oven 41 is received by the bucket 31 and conveyed to the pre-chamber 12, and is put into the cooling tower 11 from the top of the pre-chamber 12. In FIGS. 1A to 1D, the bucket 31 is shown in an enlarged manner for easy understanding of the movement of the bucket, which is a feature of the present invention. The sizes of the cooling tower 11 and the bucket 31 are as follows. It is different from the actual size ratio.

  Hereinafter, the operation method of the coke dry fire extinguishing equipment 1 will be described along the steps shown in FIGS. 1A to 1D. First, as shown in FIG. Then, the red hot coke 32 pushed out from the coke oven 41 is received while rotating the bucket 31 as necessary. Next, as shown in FIG. 1 (b), the bucket 31 receiving the red hot coke 32 is transported onto the top of the pre-chamber 12 as shown by the dotted line in the figure using the lifting device 34. Next, as shown in FIG.1 (c), the bottom part of the bucket 31 is opened and the red hot coke 32 is thrown in in the prechamber 12 of the coke dry-type fire extinguishing equipment 1. FIG. Next, as shown in FIG. 1 (d), the bucket 31 emptied by introducing the red hot coke 32 into the pre-chamber 12 is moved by using a lifting device 34 as shown by a dotted line in the drawing. Carry up. Thereafter, the bucket 31 is transported to the position where the next red hot coke 32 is pushed out by the carriage 33, and prepared for the coke receiving body of the next kiln. Thereafter, the operations described in FIGS. 1A to 1D are repeated.

  FIGS. 2A and 2B are a side view and a plan view, respectively, for explaining an example of the bucket 31 in the coke dry fire extinguishing equipment, and FIGS. 3A and 3B are respectively a coke dry type. It is a figure for demonstrating the subject of the bucket in fire extinguishing equipment. In the example shown in FIGS. 2A and 2B, the bucket 31 includes, from the upper side, the bucket cylindrical portion 31 a, the bucket cylindrical portion 31 a, and the bucket diameter-reduced portion 31 b that is a lower sloping inclined surface at the bottom, Following the bucket diameter reducing portion 31b, a bucket bottom portion 31c having an opening / closing mechanism (not shown) for charging coke into the cooling tower is constituted. The bucket 31 may have a mechanism (not shown) for rotating the entire bucket 31.

  Here, the bucket 31 receives the red hot coke extruded from the coking chamber of the coke oven, drops the received red hot coke into the cooling tower of the coke dry fire extinguishing equipment, and then supplies the next red hot coke. In order to receive the carcass, the process of moving to the next kiln out and moving to the front of the carbonization chamber is repeated. During the repetition of this process, after the red hot coke 32 is thrown into the pre-chamber 12 from the bucket 31, generally the entire red hot coke 32 is thrown into the pre-chamber 12, and as shown in FIG. Normally, no red hot coke 32 remains in the bucket 31. Therefore, the empty bucket 31 should be used as it is for extruding red hot coke in the next kiln (carbonization chamber). However, in actuality, as shown in FIG. 3B, when the red hot coke 32 has the bucket diameter-reduced portion 31b on the inner wall surface of the bucket 31, particularly the bucket lower portion, a large amount sticks to the diameter-reduced portion 31b. There was a problem. If the coke sticks in the bucket 31, it is necessary to manually remove the attached coke, which takes time for processing and deteriorates the operating rate of the coke dry fire extinguishing equipment.

  4 (a) and 4 (b) are diagrams for explaining the characteristics of the coke dry fire extinguishing equipment of the present invention, respectively. The feature of the coke dry fire extinguishing equipment of the present invention is as shown in FIG. 1 (d), after the bucket 31 is returned to the carriage 33, and as shown in FIG. Before extruding the red hot coke 32 from the furnace 41, if the temperature of the inner wall surface of the bucket 31 exceeds 400 ° C., the inner wall surface of the bucket 31, particularly its reduced diameter portion, can be injected with water, for example. The cooling device 42 is to cool to a temperature of 400 ° C. or lower. That is, in the present invention, the cooled bucket 31 is prepared for the next extrusion of red hot coke by the carriage 33. Thus, in the case of the coke dry fire extinguishing equipment of the present invention, the temperature of the bucket inner wall surface is set to 400 ° C. by the cooling device 42 before the bucket 31 is pushed out from the next coke oven 41. It is important to cool to the following.

  As described above, in the present invention, the temperature of the inner wall of the bucket 31, in which the high temperature (for example, 600 ° C. or more) may continue even after the red hot coke 32 is charged into the cooling tower 11, is cooled to 400 ° C. or less, Although it is possible to prevent sticking of coke to the wall surface, as a result, the time required for removing sticking can be omitted or shortened, and the operating rate of the coke dry fire extinguishing equipment can be improved. It becomes like this.

  The reason why the coke sticks to the inner wall of the bucket 31 is that tar remaining in the coke after dry distillation is released into the bucket 31 under a high temperature (> 400 ° C.) and the tar is thermally decomposed. It is presumed that it is carbonized and the residue collects and coagulates the surrounding coke mass.

  In the operation method of the coke dry fire extinguishing equipment of the present invention described above, when the temperature of the inner wall of the bucket 31 is set to 350 ° C. or less, as can be seen from the examples described later, the sticking of the coke to the inside of the bucket 31 is more effective. This is preferable because it can be prevented completely and can be eliminated almost completely. In the operation method of the coke dry fire extinguishing equipment of the present invention, the bucket is cooled by spraying a predetermined amount of water in 10 to 30 seconds according to the temperature of the inner wall surface of the bucket 31 before receiving the red hot coke 32. It is preferable to adjust by the cooling device 42 that can cool the inner wall surface of the bucket to a predetermined temperature (≦ 400 ° C.) in a short time.

  As shown in FIG. 4B, the temperature of the inner wall of the bucket 31 is an average temperature obtained by measuring the inner wall surface of the bucket, in particular, the bucket diameter-reduced portion 31b with a non-contact thermometer such as a thermoviewer. It is preferable to measure by obtaining.

  In the operation of the dry fire extinguishing equipment, a bucket that receives 20 tons of red hot coke at a time is used. Cooling with cooling water to various temperatures lower than 600 ° C. was performed, and then a method of receiving red hot coke of the next kiln with a bucket was performed. The relationship between the cooling temperature of the bucket and the amount of coke stuck to the inner wall of the bucket after receiving and operating the red-hot coke of the next kiln at the cooling temperature was determined.

  FIG. 5A is an image obtained by photographing the state of the inner wall before cooling the bucket with a thermoviewer, and FIG. 5B is an image obtained by photographing the state of the inner wall after cooling the bucket with the thermoviewer. In this figure, the temperature is lower for blue and higher for red (200-600 ° C.). As an example, after cooling as shown in FIG. 5B, red-hot coke was received. The results are shown in FIG. From the results of FIG. 6, it was found that when the inner wall of the bucket was cooled to 400 ° C. or lower and the red hot coke of the next kiln was received, the red hot coke was hardly stuck to the bucket inner wall. It was also found that sticking could be suppressed almost completely when the cooling temperature was 350 ° C. or lower.

  Next, an example (multiple examples) in which reddish coke was received in a bucket whose inner wall surface was cooled to 400 ° C. or less according to the method of the present invention, and an example (multiple examples) in which the bucket inner wall surface was not cooled as in the prior art. Example), and whether or not there was coke sticking, the sticking occurrence rate (average) was determined by whether or not cooling. The result is shown in FIG. From the results shown in FIG. 7, it was found that the sticking occurrence rate when cooled was about half that when not cooled.

  The operation method of the coke dry fire extinguishing equipment according to the present invention is an effective method for various equipment other than CDQ handling red hot coke, such as a receiving hopper.

DESCRIPTION OF SYMBOLS 1 Coke dry-type fire extinguishing equipment 11 Cooling tower 12 Pre-chamber 13 Cooling chamber 21 Boiler 22, 23 Pipe line 31 Bucket 31a Bucket cylindrical part 31b Bucket diameter-reduction part 31c Bucket bottom part 32 Red hot coke 33 Car 34 Lifting device 41 Coke oven 42 Cooling device

Claims (5)

  A method for operating a coke dry fire extinguishing system, characterized in that red coke extruded from a coke oven is received in a bucket having an inner wall surface temperature of 400 ° C or lower.   2. The coke dry-type fire extinguishing equipment bucket, after extruding red hot coke from a coke oven, after cooling the temperature of the inner wall surface of the bucket to 400 ° C. or lower, the red hot coke is received by the bucket. The operation method of the coke dry fire extinguishing equipment described in 1.   The temperature of the said inner wall surface is 350 degrees C or less, The operating method of the coke dry-type fire extinguishing equipment of Claim 1 or 2 characterized by the above-mentioned.   The said inner wall surface is sprinkled with a water spray for 10 to 30 seconds according to the temperature of the bucket inner wall surface before receiving red-hot coke, and is cooled. How to operate coke dry fire extinguishing equipment.   The operation method of the coke dry fire extinguishing equipment according to any one of claims 1 to 4, wherein the inner wall surface of the bucket is a bucket reduced diameter portion at a lower portion of the bucket.