JPS6033150B2 - Cutting speed control method of tower-type dry cooling equipment for grain agglomerates - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the cutting speed of a tower-type dry cooling equipment for agglomerates, such as a coke cooling and extinguishing equipment.

Due to the structure of the furnace body, agglomerates are cut out from the tower-type dry cooling equipment in batches, and if the cutting timing is set at regular intervals by a timer, etc., the operator However, a method is used in which the cutting speed and cutting amount per unit time are calculated from the fixed time interval.

In this case, in order to understand the cutting speed or cutting amount before and after changing the cutting timing, the operator must calculate the cutting speed or cutting amount from the number of cuttings per hour, and the operator must calculate the cutting speed or cutting amount from the number of cuttings per hour. Management was complicated.

Another disadvantage is that the setting of the cutting timing must be changed each time in order to maintain the cutting amount that matches the operating schedule even when the cutting situation changes due to disturbances or the like. The present invention eliminates such drawbacks, monitors the agglomerate cutting status and operating status in a coke dry cooling and extinguishing equipment, etc., maintains an operating schedule, and improves the accuracy of cutting control. The required agglomerate cutting amount per unit time is set as the agglomerate cutting speed in the agglomerate cutting setting device, and the agglomerate cutting speed is input into the calculator. and inputting the cutting signal of the particle soul cutting device to the arithmetic unit,
The agglomerate cutting speed is calculated in the arithmetic unit from the number of agglomerate cutting signals within a required elapsed time, and the reference agglomerate required cutting time interval is calculated from the agglomerate cutting speed setting and the agglomerate cutting amount per time. The calculation unit calculates the required time interval for cutting out the agglomerates from the standard required time interval for cutting out the agglomerates and the agglomerate cutting speed, and operates the agglomerate cutting device to calculate the amount of agglomerates to be cut out. The gist of this invention is a method for controlling the cutting speed of a tower-type dry cooling equipment for grain agglomerates, which is characterized in that the cutting rate is made to match the required cutting amount.

Next, one embodiment of the present invention will be explained with reference to FIG.
is a red-hot coke granule cooling tower, with a charging port 2 at the top.
is provided, and a cutout device 3 such as a cutoff valve is provided at the bottom.
is provided.

The cooling gas sent by the gas blowing fan 4 is blown into the cooling tower 1 from the cooling gas blowing port 5 to cool the red-hot coke particles 6, and is sent to the waste heat boiler 8 from the gas outlet 7. The gas is exchanged with heat and circulated again to the gas blowing fan 4. A coke cutting number detector 9 such as a limit switch is attached to the cutting device 3, and a signal indicating that the cutting device 3 opens and cuts coke is sent to the calculator 1.
You can also enter 0.

In the computing unit 101, the required amount of coke cut out per unit time set in the coke cutout setting device 11 is inputted as the coke speed. The computing unit 10 calculates the coke cutting speed as described below based on the input from the coke cutting number detector 9 and the input from the coke cutting setting device 11, and outputs it to the cutting device 3 as a cutting device operation signal 12. At the same time, the coke cutting speed is displayed and recorded on a display 13. The amount of coke cut out when the cutting device 3 operates once is determined in advance, and Qout: Actual amount of coke cut out per operation (■n/times) xt: Number of coke cutouts within the elapsed time (times) ) t: elapsed time (H), the normal coke cutting speed VF when coke is constantly being cut out is VF = Jukusan here.

Skin/H) --- (Equation 1) When coke is being constantly cut out, the calculation of Equation 1 is performed in the computing unit 10'.

Next, Vs: Coke cutting speed setting value (ton/H) ts:
Cutting time interval per coke cutting (H/times) when coke cutting speed setting value Vs (n/H) t': Cutting time interval (H/times) t: Elapsed time (H) c: Coke When the cumulative value of the number of extractions (times) is ts=Qout/Vs (H/times) and t'=t/c (H/times),
From the start of coke cutting until it reaches a steady state,
Alternatively, the coke cutting speed VF' during a transition period from when the coke cutting speed setting value is changed until a certain period of time has elapsed is vF'=V student (ton/H)...(
It is expressed by equation 2).

Coke cutting control is performed by adjusting the cutting time interval (interval) of the cutting device 3.
Then, the following calculation is performed, and based on the calculation result, it is outputted to the cutting device 3 as a cutting device operation signal 12 to control it.

If tx is the time interval for cutting out coke in normal conditions, then tX=tSX (H/times)---(Formula 3).

Further, if rx is the coke cutting time interval during the transient period, then t'X$xkasa(H/wind...(Formula 4)).

As the cutting device, in addition to the embodiment shown in FIG. 1, a device using a gate as shown in FIG. 2 can also be used.

That is, in the lower part of the cooling tower 1 of the tower-type dry cooling equipment for granules, a cutoff valve 14, an upper bunker 5, an upper gate 16,
A lower bunker 17 and a lower gate 18 are provided, and an arithmetic unit 10 (
1)), the cutoff valve 14, upper gate 16, and lower gate 18 are opened and closed as shown in FIG.
Control may be performed in the order of B, C, and D. In Fig. 3, the same parts as in Fig. 1 are given the same reference numerals, 19 is the discharge chute, 2 river electric feeders, 21 is the conveyor, and 1 cycle time in Fig. 4 is 51 seconds. FIG. To specifically explain the above contents using an example, the coke cutting setting device 1
1, the coke cutting speed is set as Vs=50 (ton/H), and the cutting device activation signal 12 to "start cutting coke" is issued.

Until a certain period of time has elapsed since this signal was output, Equation 2, which is a calculation formula for the coke cutting speed during a transient period, is used.

Unless the coke cutting speed set in the coke cutting setting device 11 is 0 (ton/H), the speed shown in FIGS.
Coke is cut out in the order of A to B, C, and D in the figure, and the coke cutout number detector 9 counts the number of coke cutouts as one.

After the command to "start cutting out coke" is issued, one cutting of coke is carried out in 51 seconds as shown in Figure 4.
Assuming that the amount of coke cut out per run is 1.5 (tons/time), the display 13 displays 90 (men/H) as the coke cutout speed after one minute has passed. Coke cutting control is performed at time intervals based on (Equation 4). The amount of coke cut out per run is 1.5 (t
on/time), the coke cutting speed setting device 11
In order to maintain the coke cutting speed 50 (■n/H) set to , ts=Qout/Vs(H/times)=1
．． 5/50 = 0.03 (H/time), which means 0.03 per time.
・The cut-out time interval of 0 knowledge time becomes the standard.

Substituting the above numerical values into (Equation 4), t'X=tSX method=〇. 〇3 (day side x total dawn = 0.054
(H/times)=3 minutes 14.4 (seconds/times) is obtained, and the coke cutting time interval 1 minute after the command to "start coke cutting" is 3 minutes 14.4 seconds, which means 3 minutes 14.4 seconds. The next coke cutting command will be issued after 4 seconds.

Next, the coke cutting speed VF' during the transient period and the coke cutting time interval t'x during the transient period are expressed as (Formula 2)
Calculations are made using (Equation 4) and the numerical values for each increase in the sand unit of 3 and the number of coke cuttings are as follows.

VF' Kutol H) t'x (1) 51 hair count elapsed
105.88 3 minutes 48 seconds (0.0142 hours) (Coke cutting) VF (or H) t'x ■1 minute elapsed 90.0 3 minutes 14 seconds (
0.0166 hours)'3) 1 minute 30 seconds elapsed
60.0 2 minutes 09 seconds (0.025 hours) (4) 2 minutes elapsed 45.0 1 minute 37 seconds (0.03
33 hours) (order to cut out coke) ■ 2 minutes 30 seconds elapsed 36.0 1 minute 17
Second・(0.0416 hours) (6) 2 minutes 5 1 second elapsed
63.152 minutes 16 seconds (0.0475 hours) (
60.0 2 minutes 09 seconds (0.05 hours) (8i 3 minutes 30 seconds elapsed)
51.4 1 minute 51 seconds (0.0583 hours) ■ 4 minutes elapsed 45.0 1 minute 37 seconds (0.06
66 hours) (coke cutting command) ■ 4 minutes 30 seconds have passed 40.0 1 minute 26 seconds (0.075 hours) 0U 4 minutes 51 seconds have passed
55.6 2 minutes 00 seconds (0.08 hours) (coke cutting) 02 5 minutes elapsed 54.0 1 minute 56
seconds (0.0833 hours) As mentioned above, the coke cut-off time interval is such that the coke cut-off command is issued when the elapsed time after the coke cut-off command is equal to or greater than the calculated coke time interval t'x during the transient period. become.

In the above example, it is determined whether the actual coke cutting time interval is greater than or equal to t'x using the control timing only in units of 3 capes, but it is also possible to determine whether the control timing is controlled every second. good. Next, the usage of normal times and transient times will be explained.

The transient period refers to when cutting is started or the cutting speed setting value is changed, and the normal period refers to other steady conditions.

Relative to the current time (for example, tn hours).

The coke cutting situation up to a "certain time", for example 30 minutes, is used as calculation data. If the above-mentioned "certain time" is too short, the coke cutting speed display will become rough due to the weight of the amount of coke cut out per run (for example, 1.5 tons/time); on the other hand, if the "certain time" is too long, Despite being unable to respond to sudden changes and the cutting speed changing rapidly,
It will take some time for the coke rate display to show that. Therefore, (Formula 2) and (Formula 4) are used during transient times, and (Formula 1) and (Formula 3) are used during normal times. In actual use, the period of about three eaves after starting cutting or changing the set value is considered as a transition period, and after that, switching is performed as a normal period. If cutting stops for some reason,
Or, if the cutting speed changes due to a disturbance such as stopping cutting due to operational reasons, the cutting speed will be returned to the transient state again.

The above-mentioned (Formula 1) to (Formula 4) are just examples, and the operating function may be provided by other calculation formulas.

The present invention can be used not only during normal times when grain agglomerates are being cut out in a steady state, but also during transient times such as when starting cutting, changing cutting speed, and changing cutting conditions due to disturbances, and after a certain period of time has passed. There is no error in the cutting amount between the set value and the actual value, and the accuracy of cutting control can be improved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is an explanatory diagram of another embodiment of the invention, Fig. 3 is an explanatory diagram of the operation of the embodiment of Fig. 2, and Fig. 4 is an explanatory diagram of the third embodiment of the invention. It is a graph which shows the operating state of a figure. 1... Red-hot coke granule cooling tower, 3...
・Coke cutting device, 9...Coke cutting number detector, 10...Calculator, 11...Coke cutting setting device, 12...Coke cutting device activation signal , 16... upper gate, 18... lower gate. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. Set the required agglomerate cutting amount per unit time as the agglomerate cutting speed in the agglomerate cutting setting device, input the agglomerate cutting speed to the computing unit, and input the cutting signal of the agglomerate cutting device to the computing unit. Calculating the agglomerate cutting speed from the number of agglomerate cutting signals within the required elapsed time in the arithmetic unit,
The standard required agglomerate cutting time interval is calculated by the calculator from the agglomerate cutting speed setting and the agglomerate cutting amount per time, and the agglomerate is calculated from the reference agglomerate required cutting time interval and the agglomerate cutting speed. A tower-type dry cooling equipment for cutting out agglomerates, characterized in that the required cutting time interval is outputted from the computing unit to operate the agglomerate cutting device so that the amount of agglomerates to be cut out coincides with the required amount of cutting out. Speed control method.