JPS5945025B2 - Coke level determination method in vertical coke extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for determining the level of inventory coke in a vertical coke extinguishing equipment, particularly in a prechamber.

Generally, coke dry extinguishing equipment is used in which red-hot coke is charged from a coke oven into coke extinguishing equipment, the red-hot coke is brought into contact with circulating gas and lowered within the equipment, and the cooled coke is taken out from a cutting device below. (CDQ)
is known.

The upper part of the fire extinguishing equipment is a pre-chamber A, and the lower part thereof is a cooling chamber B, and red-hot coke enters the pre-chamber A from the top of the fire extinguishing equipment.

By the way, the role of the prechamber in the CDQ equipment is the following two points.

■ It is located between batch operation of coke oven kiln and continuous operation of CDQ cooled coke, and serves as a buffer tank.

■ Constantly supplying red-hot coke to the chamber (cooling room) and ensuring stable steam generation through uniform contact with circulating gas.

Therefore, it is extremely important to know the amount of inventory in the bleed chamber of CDQ equipment for proper operation, but the temperature inside the bleed chamber is high temperature reaching 800° to 1000°C, and coke lumps are constantly moving. Therefore, it is difficult to install a continuous level measuring device, and if you install a non-contact type or electrode type level switch that uses radiation or microwaves, you are forced to do discontinuous level detection. I didn't get it.

In addition, since the radiation type uses a transmission type, drilling holes in the bricks of the Brechamber requires processing, which poses problems in terms of the strength of the brick structure.

Electrode level meters still have problems with their lifespan when used in break chambers due to their strength.

The present invention was made for the purpose of continuously monitoring the coke level in a break chamber with such equipment characteristics, and its gist is that a predetermined amount of red-hot coke is loaded from above the upper break chamber. In a vertical coke extinguishing system in which cooled coke is cut out from the bottom of the lower cooling chamber, a predetermined amount of red-hot coke is charged and the amount of cooled coke cut out from below is determined over time. At the same time, the coke level in the bleed chamber is determined, and the amount of red hot coke charged is periodically adjusted so that the coke level matches an arbitrary level within the level range that can be detected by the level detection end installed in the upper part of the bleed chamber. This method is a method for determining a coke level in a vertical coke extinguishing equipment, characterized in that the coke level determined from the charging amount and the discharge amount is periodically calibrated using the adjusted coke level.

The present invention will be explained in detail below.

First, compare the amount of red hot coke charged and the amount of cooled coke discharged. However, the amount of cooled coke discharged is determined by the amount of red hot coke extruded per unit), so it can be regarded as a fixed amount, but the amount of cooled coke discharged is always determined whether it is continuously cut out from the cutting device below the cooling chamber or intermittently cut out. Since the amount of sushi is not constant, it is preferable to actually measure the amount of sushi discharged using a weighing machine at a stage subsequent to the cutting device (for example, a belt conveyor).

However, if the cutting device uses an intermittent cutting method and the cutting amount is close to a constant amount due to the capacity of one chamber of the cutting device, the average cutting amount for one cutting should be calculated in advance. This may be multiplied by the number of cuttings to obtain the discharge amount.

Next, the coke level is calibrated in order to eliminate the accumulation error in the coke level determined from the amount of red hot coke charged and the amount of cooled coke discharged. Install a detection end (for example, a level switch), adjust the amount of red-hot coke to a desired level within the level range that can be detected by this level detection end, and compare the coke level at this time with the amount charged and discharged. This is to calibrate the coke level determined from the amount.

This calibration is performed periodically (for example, about once a day).

This embodiment is shown in FIG.

First, as mentioned above, the cooling equipment C has the upper part of the pre-chamber A and the lower part of the cooling chamber B, and the detection end 1 for detecting the number of times red hot coke is charged is provided at the top of the pre-chamber A. A detection end 2 for detecting the number of cuttings is provided on the exit side.

The detection end 1 on the charging side is, for example, ■ A contact limit switch for the charging device ■ A non-contact or contact limit switch for dropping packets ■ A timer installation signal from a certain position of the crane, etc. On the side, the cutting speed (number of cuttings/time) of the CDQ cutting device is set corresponding to the production capacity of the coke oven, and as the detection end 2, for example, the cylinder limit of the discharge gate is used.

At these detection terminals 1 and 2, as mentioned above, the charging amount per time and the approximate discharge amount are known, so the number of detections is a function of the charging and discharging amounts, and these detection signals are respectively commanded to the volume setters 3 and 4, entered into the adder/subtractor 5, and the difference thereof is entered into the volume/level conversion converter 6 to grasp the current level.

1 is a recorder. Figure 2 is an example of a record of charging and cutting.The charging side is determined by the number of times/time depending on the production capacity of the coke oven, and the cutting side is determined by taking into account the production capacity and cooling capacity as mentioned above. The number of times/time is determined, and the timing is different for both.

Therefore, according to such a process, the movement of the coke level within the brewing chamber can be determined by comparing the cumulative amount charged and the cumulative amount cut out.

Figure 3 shows that the level in the prechamber can be recorded and displayed if the level at the start of cooling is given and this is set as the origin 0, and this origin O is set at a certain position in the prechamber (for example, the center of the effective stock). ing.

However, as mentioned above, the amount of inventory in the Brechamber is
Since the cumulative subtraction calculation is performed assuming that the amount of cut coke is constant, a level error occurs due to the accumulation of errors.

Therefore, in the present invention, a non-contact type or electrode type level switch is provided in the upper part of the brew chamber A, and the coke level is raised by the level switch 8 during periodic operation (for example, once a day). Calibration cancels cumulative errors.

In this case, the lower part of the brake chamber, which is difficult to install due to the brick structure, can be lowered and only one level switch can be installed at the upper part.

Further, the arithmetic circuit can be implemented by an analog circuit or by software processing by a computer.

As described above, according to the present invention, even if the timing of charging and discharging and the exact amount cannot be ascertained, the level detection end for actual measurement can be set at a location that is not significantly affected by temperature etc. This has the effect of being able to grasp the coke level in accordance with the actual operation when used in combination with the provision of a

[Brief Description of the Drawings] Figure 1 is an explanatory diagram of an embodiment of level grasping according to the present invention, Figure 2 is a record diagram showing an example of practical coke charging and discharge records, and Figure 3 is a diagram according to the present invention. It is an explanatory view showing a coke level grasp chart. A is the upper prechamber, 1B is the lower cooling chamber, C is the cooling equipment, 1 and 2 are the detection ends, 3゜4 is the volume setting device, 5 is the adder/subtractor, 6 is the conversion converter, 7 is the recorder, 8 is the level switch.

Claims (1)

[Claims] 1. In a vertical coke extinguishing equipment in which a predetermined amount of red hot coke is charged from above the upper breech chamber and cooled coke is cut out from below the lower cooling chamber, a predetermined amount of red hot coke charged and The coke level in the prechamber is determined over time from the amount of cooled coke discharged from the bottom, and the coke level is determined at any level within the level range that can be detected by the level detection end installed in the upper part of the prechamber. The amount of charged red hot coke is periodically adjusted so that the levels match, and the coke level determined from the amount of charged coke and the amount of discharged is periodically calibrated based on the adjusted coke level. Method for determining coke level in type coke extinguishing equipment.