JP2010196027A - Method of measuring coke level in coke dry quenching facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of measuring the coke level in a coke dry quenching facility in which the coke level and coke amount in a chamber are measurable with sufficient accuracy by one level meter. <P>SOLUTION: The method of measuring the coke level in a coke dry quenching facility includes: continuously irradiating with a detecting beam a coke C which has been deposited into one or two or more angle shapes in a chamber from a level meter 3 installed in the upper part of the chamber 1 of the coke dry quenching facility; and measuring the coke level in the chamber by detecting the reflective beam, wherein the level meter 3 is made to rock so that the detecting beam from the level meter may pass each apex C1a, C1b of an angle shape in the coke which has been deposited into one or two or more angle shapes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for measuring a coke level in a coke dry fire extinguishing equipment (hereinafter referred to as “CDQ equipment”).

  FIG. 4 shows a general configuration of the chamber portion of the CDQ facility. In the CDQ facility, the red hot coke discharged from the coke oven is put into the chamber 1 from the top of the chamber 1, and the red hot coke is lowered while being brought into contact with the cooling gas blown from the lower portion of the chamber 1. The cooled coke is discharged from the cutting device. On the other hand, the cooling gas is discharged out of the chamber 1 from the sloping flue 2 at the top of the chamber 1.

  In the operation of the CDQ facility, management of the coke level in the chamber 1 is important. That is, when the coke level exceeds the upper limit position and hot red hot coke overflows from the upper part of the chamber 1, large equipment damage is caused. If the coke level falls below the lower limit position below the sloping flue 2 part, the cooling gas blown from the lower part of the chamber 1 will blow through the upper part of the chamber 1 (pre-chamber part), and the CDQ equipment is operated. No longer holds.

  In addition, in order to optimize the operating conditions of the CDQ facility and to coordinate the production schedule with the coke oven in the upper process, not only the coke level is managed, but the coke level is accurately measured and grasped, and the chamber 1 It is important to understand the amount of coke.

  Conventionally, as a method for measuring a coke level in a CDQ facility, a method of Patent Document 1 using a level meter is known. As shown in FIG. 4, the method of Patent Document 1 uses a detection beam from a level meter 3 provided substantially vertically above the apex of coke accumulated in a mountain shape in the chamber 1 toward the apex C1 of the coke C. The coke level in the chamber is measured by detecting the reflected beam.

  However, the method according to Patent Document 1 cannot grasp the amount of coke in the chamber 1 with high accuracy. Because the particle size and shape of the coke put into the chamber 1 vary depending on the operating conditions of the coke oven, etc., the repose angle (mountain shape) of the coke deposited in the chamber in actual operation varies. Yes (see broken line in FIG. 4). That is, in the method of Patent Document 1, since the level meter 3 is fixed substantially vertically above the apex C1 of the coke accumulated in a mountain shape in the chamber 1, only the level of the apex C1 of the coke can be grasped and fluctuates. Since the angle of repose (cylinder shape) of coke cannot be grasped, the amount of coke cannot be grasped with high accuracy.

  In the example of Patent Document 1, one level meter 3 is installed on the premise that coke is deposited in a single mountain shape (one mountain) in the chamber. In the CDQ facility in which 4 (see FIG. 1) is arranged, coke is deposited in the chamber 1 in two mountain shapes (two mountains). In this case, in the method of Patent Document 1, it is necessary to install two level meters 3. However, when the level meter 3 is arranged toward the tops of the two mountain shapes, the bell 4 is actually a barrier, and an irradiation axis that connects the detection beam from the level meter 3 and the vertex C1 of the coke cannot be secured. Level detection itself is not realized. Even if the irradiation axis can be secured, it is not practical to install two level meters 3 on the charging lid that opens and closes because the weight burden on the charging lid becomes too large. Expenses also become large. Furthermore, even if two level meters 3 are installed, the above-described problem that the amount of coke cannot be grasped with high accuracy cannot be solved.

JP 2001-158882 A

  The problem to be solved by the present invention is to provide a method for measuring the coke level in a CDQ facility, which can accurately measure the coke level and the amount of coke in the chamber with a single level meter.

  The present invention continuously irradiates a coke deposited in one or a plurality of mountain shapes in a chamber from a level meter installed in the upper part of the chamber of the CDQ equipment, and detects the reflected beam to detect the reflected beam. In a coke level measurement method in a CDQ facility that measures a coke level, the level meter is swung so that the detection beam from the level meter passes through the peak of each mountain shape in the coke accumulated in one or more mountain shapes. It is characterized by doing so.

  In this way, by swinging the level meter so that the detection beam from the level meter passes through the apex of the coke accumulated in the mountain shape, not only the level of the coke apex but also the repose angle of the coke ( Can also measure the coke level and the amount of coke in the chamber. The amount of coke in the chamber can be obtained by calculation based on the level of the apex of the coke, the angle of repose of the coke (the shape of the angle), and the inner diameter of the chamber.

  In addition, even when coke is deposited in two mountain shapes (two mountains), by swinging the level meter, the level of the top of each mountain shape and the angle of repose of coke ( Yamagata shape) can be measured.

  The range (oscillation angle) in which the level meter is swung is such that the detection beam from the level meter is accumulated in one or more mountain shapes at each of the upper and lower positions of the coke level. It is preferable to set so as to pass through the apex. As a result, the coke level and the amount of coke in the chamber can be accurately measured at all positions from the upper limit position to the lower limit position of the coke level.

  Moreover, it is preferable to perform the swing of the level meter once in 5 to 10 seconds. One swing time of the level meter (hereinafter referred to as “one swing time”) is set in consideration of the descending speed of the coke descending in the chamber. That is, the descending speed of the coke in the chamber is the fastest when no coke is fed from the top of the chamber and only the discharging from the lower part is performed, and the descending speed at this time is approximately 1 to 2 mm / s. When the measurement accuracy of a level meter (microwave level meter) is considered to be ± 10 mm, 5 to 10 seconds is appropriate for one swing time of the level meter. If one swing time is shorter than 5 seconds, the response time of the level meter (time until the detection beam is irradiated with the detection beam and the reflected beam is detected) is insufficient, and conversely, one swing time is more than 10 seconds. If the length is long, the level of coke apex and the shape of the chevron change during measurement, which may reduce the measurement accuracy.

  In the present invention, the coke level data measured by the level meter is processed by the processing circuit to obtain the coke accumulation shape in the chamber, and this accumulation shape is displayed in real time on the operation monitoring screen. Can do.

  According to the present invention, the coke level and the amount of coke in the chamber can be accurately measured with a single level meter, the coke level can be properly managed, and the operating conditions of the CDQ equipment according to the amount of coke can be controlled. Adjustment and adjustment of the production schedule with the coke oven in the upper process can be appropriately performed.

It is sectional drawing which shows 1st Example of this invention. The example of a display of the screen for operation monitoring by 1st Example of this invention is shown. It is sectional drawing which shows 2nd Example of this invention. It is sectional drawing which shows the general structure of the chamber part of CDQ equipment, and the measuring method of the conventional coke level.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

  FIG. 1 is a sectional view showing a first embodiment of the present invention. This embodiment shows a case where coke is deposited in two ridge shapes (two ridges) in the chamber 1.

  A microwave level meter 3 is installed as a level meter above the chamber 1 of the CDQ facility. The microwave level meter 3 continuously irradiates the coke C in the chamber 1 with a microwave beam (detection beam), and detects the reflected beam to measure the coke level in the chamber 1.

  Specifically, the microwave level meter 3 is oscillated so that the microwave beam from the microwave level meter 3 passes through the peaks C1a and C1b of each of the mountain shapes in the coke C deposited in two mountain shapes. To.

  The range (oscillation angle) in which the microwave level meter 3 is swung is the coke in which the microwave beam from the microwave level meter is deposited in two mountain shapes at both the upper limit position L1 and the lower limit position L2 of the coke level. It is set so as to pass through each peak C1a and C1b of the mountain shape in C. Referring to FIG. 1, the range in which the microwave level meter 3 is oscillated (swing angle) is a line connecting the microwave level meter 3 to the peak C1b of the coke at the coke level upper limit position L1, and the microwave. A range obtained by adding an angle α on the outside to an angle δ formed by the line connecting the coke vertex C1a at the coke level lower limit position L2 from the level meter 3 is set. The angle α is, for example, 0 to 10 °.

  By setting a range (oscillation angle) for oscillating the microwave level meter 3 within such a range, the coke vertices C1a and C1b are at the positions of the coke level at the upper limit position L1 to the lower limit position L2. The repose angle of the level and coke (the shape of each of the two peaks) can be accurately measured. Then, the amount of coke in the chamber 1 can be accurately obtained by calculating based on the levels of the vertices C1a and C1b of the coke, the angle of repose of the coke (the shape of the angle), and the inner diameter of the chamber 1.

  Further, the coke level data measured by the microwave level meter 3 is processed by a processing circuit (not shown) to obtain the accumulated shape of the coke in the chamber 1, and this accumulated shape is displayed on the operation monitoring screen in real time. It can be displayed.

  FIG. 2 shows an example of the display. 2A shows a normal state where the course level is between the upper limit position L1 and the lower limit position L2, and FIG. 2B shows an abnormally elevated state where the course level exceeds the upper limit position L1, and FIG. ) Shows an abnormally lowered state in which the course level is below the upper limit position L1. In each of the states of FIGS. 2A to 2C, the course level state can be known at a glance by changing the color for displaying the coke accumulation shape. In addition, in the abnormally rising state (FIG. 2B) and the abnormally decreasing state (FIG. 2C), “HH-level” and “LL-level” blink display and alarm output are performed, respectively. Operators can easily detect abnormal conditions. In FIGS. 2A to 2C, it is displayed that the amount of coke is “normal range”, “upper upper limit”, and “lower lower limit” according to each state.

  FIG. 3 is a sectional view showing a second embodiment of the present invention. This embodiment shows a case where coke is accumulated in one mountain shape (one mountain) in the chamber 1.

  Also in this case, the microwave level meter 3 is swung so that the microwave beam from the microwave level meter 3 passes through the peak C1 of the coke C deposited in one peak shape.

  The range (oscillation angle) in which the microwave level meter 3 is swung is such that the microwave beam from the microwave level meter accumulates in one mountain shape at both the upper limit position L1 and the lower limit position L2 of the coke level. It is set so as to pass the peak C1 of the mountain shape in the coke C. Referring to FIG. 3, the range (oscillation angle) in which the microwave level meter 3 is oscillated is from the microwave level meter 3 to the microwave and the straight line connecting the apex C1 of the coke at the coke level upper limit position L1. The angle δ formed by the line connecting the coke vertex C1 at the coke level lower limit position L2 from the level meter 3 is set to a range obtained by adding the angle α to the outside.

  Also in this embodiment, the coke level and the amount of coke in the chamber 1 can be measured with high accuracy, as in the previous embodiment.

  In the above embodiment, the microwave level meter is used as the level meter. However, the present invention is not limited to this, and any level meter can be used as long as it can irradiate the detection beam and detect the reflected beam. May be used.

  The present invention can be used for measuring the coke level in a chamber in a CDQ facility, and can also be used for measuring a raw material level in a charging hopper of a blast furnace facility and a blast furnace.

1 Chamber 2 Slowing Flue 3 Level meter (microwave level meter)
4 Bell C Coke C1, C1a, C1b Coke apex

Claims (4)

The coke level in the chamber is detected by continuously irradiating the coke deposited in one or more mountain shapes in the chamber from the level meter installed at the top of the chamber of the coke dry fire extinguishing equipment and detecting the reflected beam. In the coke level measurement method in the coke dry fire extinguishing equipment that measures
Coke level in coke dry fire extinguishing equipment, wherein the level meter is swung so that the detection beam from the level meter passes through the top of each mountain shape in the coke deposited in one or more mountain shapes Measurement method.   Range in which the level meter is swung so that the detection beam from the level meter passes through the top of each mountain shape of the coke accumulated in one or more mountain shapes at both the upper limit position and the lower limit position of the coke level. The method for measuring the coke level in the coke dry fire extinguishing equipment according to claim 1.   The measuring method of the coke level in the coke dry-type fire extinguishing equipment of Claim 1 or 2 which performs one rocking | fluctuation of a level meter within 5 to 10 seconds.   The coke level data measured by the level meter is processed by the processing circuit to determine the coke accumulation shape in the chamber, and the accumulation shape is displayed in real time on the operation monitoring screen. Coke level measurement method in the described coke dry fire extinguishing equipment.

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