JPS60161480A - Automatic operation of coke dry quenching apparatus - Google Patents

Abstract

PURPOSE:To carry out the automatic control of the flow of circulating air, by inputting the amount of discharged coke and the volume of air per unit coke to the preliminarily stored data of characteristic curve, calculating the corresponding pressure drop, and controlling the opening of a dampler so as to coincide the calculated value with the actual pressure drop. CONSTITUTION:The characteristic curve data of the relationship between the flow rate of the circulation air flowing through the circulation system 6 and detected by the gas flow sensor 14 and the pressure drop caused by the circulation fan 4 and obtained by the pressure difference detected by the pressure sensors 15, 16 are stored in the memory of the controller 12. The characteristic data of the discharged coke temperature corresponding to the air flow rate per unit coke is also stored in the memory of the controller 12 making the amount of the discharged coke as a parameter. During the operation of the apparatus, the desired air flow rate per unit coke and the amount of discharged coke are inputted from the input setting device 19 into the controller 12, and the necessary amount of the circulation gas is calculated by the controller 12. The corresponding pressure drop is calculated from the above data of the curve, and the damper-driving apparatus is controlled so as to coincide the calculated value with the actual pressure drop.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a coke dry type system that automatically adjusts the circulation fan damper by inputting the coke cutting amount and the coke unit JIl amount to obtain the circulating gas air volume that corresponds to the set value. Concerning automatic operation method of fire extinguishing equipment.

[Technical costs of the invention and its problems] In the conventional operating method of coke dry extinguishing equipment, the flow of circulating gas flowing through the circulation system was controlled manually by the operator's experience. In other words, the circulating gas JiIf& is determined in order to cut out a predetermined amount of coke within a predetermined temperature range, but since the actual values of the cut coke temperature and circulating gas flow rate involve complicated factors, it is necessary to determine the circulating gas Jilfa to control the circulating gas Jilfa. Not fully utilized. For the time being, the circulating gas flow rate is measured using an ultrasonic flow meter, etc., but this is only for monitoring purposes, and the actual value is used as a guideline for adjusting the air flow rate using the circulation fan damper. If a detector is installed to detect coke temperature, it is used only for monitoring the coke temperature.If a detector is not installed, it is used to sample the cut coke temperature and measure it from the hydraulic oil. Knowing the temperature was all that was required, and linking the cut coke temperature to the circulating gas ff1ffi relied on intuition. The relationship between the cutting amount and the circulating gas flow rate also shows that if the cutting amount m is increased, the circulating gas m is increased in order to maintain the cooled coke temperature.
Naturally, it was necessary to increase the number of eels, but this was all the same, and smooth control was not being carried out.

[Object of the Invention] The present invention was made in view of the above circumstances, and its purpose is to automate the circulating gas flow rate control, which has been performed manually until now, and to eliminate the need to rely on the operator's experience (simplification of operation, An object of the present invention is to provide a method for automatically operating a coke dry extinguishing equipment that can save labor.

[Summary of the Invention] In order to achieve the above object, the present invention basically provides a method for determining the temperature of cut coke when the amount of coke cut and the coke unit JII is determined, and also to obtain the cut coke temperature. Based on the knowledge that the weight of circulating gas required for
Memorize the characteristic curve data of the relationship between the weight of the circulating gas flowing through the circulation system and the pressure drop that occurs before and after the circulation fan, and calculate the desired coke cutting amount and coke unit! 1 u of circulating gas required from a@
ll is calculated, the pressure drop corresponding to the calculated gas flow rate is found from the above relationship characteristic curve data, and the damper opening degree is adjusted so that the calculated pressure loss matches the actual pressure loss to control the circulating gas flow rate. It is composed of

In addition, here the coke unit is J! II is the unit v required to cool a unit of coke to a specified temperature under certain conditions.
It refers to the dose per 7111.

[Embodiments of the Invention] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 1 shows the circulating gas flow rate i for carrying out the method of the present invention.
11 is a system diagram showing an example of the No. 11 control device. FIG.

As shown in the figure, the coke dry extinguishing equipment cools the red-hot coke by circulating and supplying circulating gas to a cooling tower 1 charged with red-hot coke, and the circulating gas whose temperature has been raised by cooling is passed through a heat exchanger ( Boiler) 2 for heat recovery. 3 is a dust remover; 4 and 5 are a circulation fan and a circulation fan damper for controlling gas suction into the circulation fan 4; these are installed in the circulation system 6; Further, 7 is a cutoff valve provided at the cutout port of the cooling tower 1.

In order to increase the amount of circulating gas that is circulated and supplied within the circulation system 6, gas temperature sensors 8 and 9 are provided before and after the heat exchanger 2, and a gas analysis sensor 10 is provided in the circulation system 6, so that the heat exchange The heat balance is calculated from the input and output heat of the heat exchanger 20 and the gas components of the circulating gas, and the water supply flow to the heat exchanger 2 obtained from the water supply flow rate sensor 11, and indirectly from this heat balance. Check the gas flow rate. Generally, these calculation processes are performed by collecting information from each sensor individually and dividing the information manually, or by inputting it into a central combicoater (not shown).

In the above configuration, various signals are received from the gas temperature sensor 8.9, the gas analysis sensor 10, and the water supply flow rate sensor 11, the heat balance is calculated from these signals, and the circulating gas f
A controller 12 with an arithmetic function and memory for calculating the amount of fl is provided. This controller 12 also receives a signal from a gas flow rate sensor 13 installed downstream of the heat exchanger 2 to detect the circulating gas flow rate, such as an ultrasonic flow meter, via a gas flow transmitter 14. From this signal, the amount of circulating gas flowing through the circulation system 6 is adjusted both indirectly and directly, and the circulating gas airflow rate that is easily determined directly from the gas flow rate sensor 14 is indirectly measured from the heat balance. The controller 12 is provided with a function of correcting based on the targeted circulating gas flow rate.

Further, pressure sensors 15 and 16 are provided before and after the circulation fan 40 to detect the circulating gas pressure, and a differential pressure signal is inputted to the controller 12 via a differential pressure transmitter 17 that determines the differential pressure from these signals. Then, the pressure loss ΔP before and after the circulation fan 4 can be determined from the differential pressure signal.

On the other hand, in the cutout l-1 of the cooling tower 1, the cutout amount is 1-kus l1fl.
Cutting to detect coke] - A coke temperature sensor 18 is provided, and its detection signal is input to the controller 12 so that the controller 12 can know the actual temperature of the cut coke. It has become. As the cut coke wet surface sensor 18, an infrared thermometer or a thermocouple is suitable.

The controller 12, which receives various input signals, is provided with an input setting device 19 that can arbitrarily set the amount of coke cut out and the amount of coke unit ffl. A cut-out valve drive device 20 that drives the cut-out valve 7 is connected, and a signal corresponding to the amount of coke cut out set by the setting device 19 is applied from the controller 12 to the cut-out valve drive device 20, and the cut-out valve drive device 20 drives the cut-out valve 7. Control. Further, a damper drive device 21 that drives the circulation fan damper 5 is connected to the output side of the controller 12, and the damper drive device 21 adjusts the opening degree of the circulation fan damper 5 based on a command signal from the controller 12. The amount of circulating gas circulating within the circulation system 6 can be controlled. Note that the circulation fan motor 22 may be controlled instead of the circulation fan damper 5.

Next, the operating method of this embodiment having the above configuration will be described.

By inputting the coke cutting port and the coke unit air flow into the controller 12, the opening degree of the circulation fan damper 5 is automatically adjusted to perform operation at the optimum circulating gas air flow.

At the beginning of operation, under the standard conditions of the coke dry extinguishing equipment, the circulating gas air volume Q [NR13/H] flowing through the circulation system 6 obtained based on the heat balance or the gas flow rate sensor 14,
Circulation fan 4 obtained from the differential pressure of pressure sensors 15 and 16
The Q/ΔP relationship characteristic curve data (1 shown in FIG. 2) with the pressure drop ΔP occurring before and after is stored in the memory of the controller 12.

Also, an alarm should sound if the allowable pressure drop is exceeded.

In addition, as shown in Fig. 3, the amount of coke cut out A [T/l-
1] as a parameter, the coke unit wind mU [Nm”/
The T/U characteristic data of one cut coke T['C] with respect to Tl is also stored in the memory of the controller 12. This cut coke #l[T['C] is an actual value obtained based on the cut coke hot stone senna 18. In the illustrated example, 2
An alarm will sound if the temperature exceeds 50 degrees Celsius. Alarm settings can be set arbitrarily.

During operation, desired coke 711 wind MULNm3/T]
and coke cutting mA [T/H1] are entered from the input setting device 19 to the controller 12), and as shown in FIG.
The controller 12 shuts out the Il pin Q [N11l /N]. For example, as shown by the dotted line < 1,60ON 1113/
When T is 130T/l-1, Q t = 1,6
00x 130=208.0OON m3/H, and the solid line 1,50ON ra3/T is 150T/
The cutting edge of H is Q 2 = 225,0OOON m3/H
It's like this. The controller 12 calculates the calculated circulating gas I! The pressure loss ΔP corresponding to the pressure drop Q [Nm3/N] is determined from the Q/ΔP relationship characteristic curve data. Then, find the deviation between this pressure drop ΔP and the actual pressure drop obtained via the differential pressure transmitter 17,
An operation command signal is output to the damper drive device 21 so that this deviation is minimized. If the actual pressure drop ΔP is smaller, the required circulating gas JiliQ [Nm3/Hl is insufficient. Therefore, a command is given to the damper drive device 21 to open the circulation fan damper 5, and the damper opening is increased. Increase the suction amount of the circulation fan 4. Conversely, if the actual pressure drop ΔP is larger, the circulating gas air volume Q [Nl13/H] is a little excessive, so the damper drive device 21 is equipped with the circulating fan damper 5.
A command is given in the direction to throttle the damper, and the damper opening degree is throttled to reduce the suction B of the circulation fan 4. By automatically adjusting the opening degree of the circulation fan damper 5 in this way, the actual circulating gas air volume Q [Nl113/H] can be adjusted to match the set value.
automatically controlled.

The two set values input from the input setting device 19 to the controller 12, coke unit wind IU [Nm3/Tl and coke cutout amount A [T/H], are based on the T/lJ characteristic data in Fig. 3. decide. That is, cut coke temperature T = 220°C
For example, if you want to cut out A = 120T/H, change the coke unit ff1fjU to 1.40ONII13/
All you have to do is set it to T. However, since this T/U characteristic data is based on the case where the coke dry extinguishing equipment is operated under standard conditions, it is only used during operation that satisfies those conditions. The actual cut coke temperature T ['C
] and the coke cutting amount A obtained by the cutting valve drive device 120 at that time [1゛/U characteristic data is corrected from time to time with T/H1, and within the range of T = 250 ° C or less The most appropriate data is always applied.

Similarly, the Q/ΔP relationship characteristic curve shown in FIG. 2 is corrected from time to time based on information input to the controller 12 to prevent control from being performed that differs from actual performance.

Then, based on the T/U characteristic data, the coke cutting MA [when changing T/H1 (for example, A=
120 T/H to A = 1107/H), the coke unit wind IU [f13/
TI can be known (To maintain T=220℃, U=1,40ON■3/ to U=1.30ON13/
Therefore, by setting the value obtained from this in the input setting device 19, the wasteful heat loss that occurs when the cut coke temperature T ['C] is drastically changed can be reduced. It can prevent the circulation gas wind IQ [r13
/H] There are few changes, and the power consumption required by the circulation fan 4 can be minimized.

In this way, according to the above embodiment, the amount of coke cut out A[T
By simply setting two values: /H1 and coke unit wind ff1U [N■3/H] and inputting the C flow into the controller 12, the circulating gas wind pressure corresponding to the above values is automatically adjusted. I can do it. In addition, the above two set values have a close relationship with the temperature of cut coke cut out from the cooling tower 1,
Cut coke temperature 1f by cut coke temperature sensor 18
Detects tT['c] and maintains it within the allowable temperature range 1 power 2
Since the two setting wheels can be known, cut coke with the desired temperature can be obtained. Therefore, it is possible to perform coke cooling that is suitable for cutting conveyors with different heat resistance limits, and since the cut coke temperature is monitored so that it does not exceed T = 250°C, it is not charged into the cooling tower 1. Cut coke temperature T [ corresponding to change in coke temperature
'C] can be obtained automatically.

In addition, when changing the coke cutting mA [T/T1] during operation, a timer function should be installed on the damper drive device 21 etc. to prevent sudden changes on the load side of the heat exchanger 2. It is desirable to apply this so that the adjustment of the circulation gap 7>damper 5 is gradually performed. In addition, the function automatically monitors the total pressure loss corresponding to the specified air volume during operation, and if there is a tendency for abnormality to occur in the circulation system 6, an alarm is sounded and the circulation fan damper 5 is fully opened. is preferably provided to the controller 12. As a result, abnormalities in the system, such as a hole opening in the circulation duct and air entering, or a broken boiler tube, can be detected quickly, and the problem can be dealt with safely.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) Circulating wind control, which was conventionally performed manually, can be performed automatically by simply setting the coke unit wind and coke cutout amount, simplifying operations and eliminating coke dry extinguishing. Automation of equipment operation can be taken one step further.

(2) Since the circulating gas pressure can be automatically controlled, power is not wasted, energy is saved, and labor is saved by reducing worker labor.

[Brief explanation of the drawing]

Fig. 1 shows a preferred embodiment of a circulating gas wind 1 control device that implements the method of the present invention. Fig. 1 is a system system diagram, and Fig. 2 is a characteristic diagram of the Q/ΔP relationship obtained based on the system shown in Fig. 1. , Figure 3 shows T/U using the amount of coke cut out as a parameter.
It is a characteristic diagram. In the figure, 4 is a circulation fan, 5 is a circulation fan damper, and 6 is a circulation fan.
is the circulation system, Q is the circulating gas wind i1ΔP is the pressure drop, U is the coke unit wind ω, A is the amount of coke cut out, and ■ is the cut coke temperature. Patent applicant Nobuo Kinuya, patent attorney for Ishikawajima Harima Juunigyo Co., Ltd.

Claims (1)

[Claims] Circulating gas J flowing through the circulatory system! 1 m and the pressure drop that occurs before and after the circulation fan is memorized, and the required circulating gas f is determined from the desired amount of coke cut out and the coke unit air volume.
f1l is calculated, the pressure loss corresponding to the calculated gas airflow rate is determined from the above-mentioned relationship characteristic curve data, and the damper opening is adjusted so that the calculated pressure loss and the actual pressure loss match.
1. A method for automatically operating a coke dry extinguishing equipment, characterized in that it is configured to control 11M.