KR20030024249A - Apparatus for individually controlling combustion of carbonization chamber using change of temperature of gas - Google Patents

Abstract

PURPOSE: An individual combustion control apparatus for coke oven chamber according to temperature change is provided to reduce heat capacity consumed by measuring temperature of gas generated during coal dry distillation in a coke oven, thereby regulating heat capacity supplied into each combustion chambers. CONSTITUTION: The individual combustion control apparatus for coke oven chamber according to temperature change comprises a temperature sensing part(300) that is installed on the curved pipe part of ascension pipe to measure temperature of coal gas; a signal transmission part comprising a transmission part(410) for transmitting converted signals by converting detected signals of the temperature sensing part(300) into current signals and a signal receiving part(420) for converting the signals received from the transmission part(410) into temperature signals; an operation control part(500) for judging the maximum temperature of coal gas and time point thereof according to the temperature signals by continuously receiving temperature signals of the signal transmission part for a preset period of time, and providing results of judgement by judging the time point as a dry distillation completion time point if the counted value passes the dry distillation completion time by comparing a counted value obtained by counting time at the maximum temperature time point with a preset dry distillation completion time (time required from the maximum temperature time point to dry distillation completion); a combustion sequence control part(600) for controlling supply and cutoff of combustion gas according to judgement results from the operation control part(500); and a controller(50) which is installed on a supply gas distribution pipe(40) and opened or closed according to controlling of supply and cutoff of the combustion gas in the combustion sequence control part(600) to control supply of the combustion gas supplied into combustion chambers.

Description

Carbonization chamber individual combustion control device according to temperature change {APPARATUS FOR INDIVIDUALLY CONTROLLING COMBUSTION OF CARBONIZATION CHAMBER USING CHANGE OF TEMPERATURE OF GAS}

The present invention relates to an individual combustion control apparatus and method for carbonization chamber according to temperature change, and in particular, by measuring the temperature of gas generated during coal drying in a coke oven, determining the dry state and the completion point of drying of the individual carbonization chamber to determine the time of completion of drying. By controlling the amount of heat supplied to each combustion chamber, the individual combustion control apparatus for the carbonization chamber according to the temperature change to reduce the amount of heat consumed.

In general, the coke plant adjusts the total amount of heat with the average temperature for each battery depending on the operation rate.The method of controlling the coke oven controls the amount of heat by measuring the temperature of the combustion chamber and For example, there is a method of controlling the amount of heat by measuring the temperature of an empty carbonization chamber and converting it into a combustion chamber temperature.

The structure of coke oven is composed of several combustion chambers, and even though the temperature of individual combustion chambers is measured, combustion is adjusted for each batch, so that the combustion cannot be adjusted according to the dry state of individual carbonization chambers. It is a centralized structure. Therefore, unnecessary carbon fuel is also oversupplied in the carbonization chamber where dry distillation is completed, and heat consumption increases due to the increase of heat source unit, which has a busy effect on the coke quality.

On the other hand, the distillation determination method developed in Japan is used to determine the proper extrusion time by measuring the temperature of gas generated in the carbonization chamber and determining the appropriate extruding time by the calculation formula. However, the calorie adjustment method according to the dry state of individual carbonization chamber is not used.

1 is a configuration diagram of a conventional coke oven supply gas facility, FIG. 2 is a diagram illustrating a conventional supply gas adjustment, and FIGS. 3A-3C are graphs illustrating a coal dry process in a coke oven.

1 to 3, the conventional coke oven combustion management system adjusts the overall heat amount by calculating the gas supply amount in the PC (PROCESS COMPUTER) in consideration of the operating conditions according to the daily output of the coke (hereinafter referred to as the operation rate) Centralized combustion control method is used. That is, the same amount of heat is supplied to the combustion chamber of the whole coke oven at the same time by the same method.

Therefore, in the current BATTERY combustion management system composed of a plurality of combustion chambers (67), unnecessary heat quantity is excessively supplied by the coke distillation process, and accordingly, the temperature difference is generated so that the excess heat quantity is controlled more than the actual supply heat quantity. It is becoming.

In the conventional centralized combustion control method, it is not possible to input calories according to the coal dry state of individual carbonization chambers, and thus fuel gas is continuously supplied until extruding even after the dry carbonation is completed, resulting in an increase in unit calories due to unnecessary fuel consumption. There is a problem, and also has a problem that adversely affects the coke quality due to overdrying.

The present invention has been made to solve the above problems, and therefore, an object of the present invention is to install a carbonization chamber heat-resistant temperature sensor in the coke oven riser bend to continuously measure the coal gas temperature generated during coal distillation Determine the point of time when dry distillation is completed after a certain period of time from the highest temperature using this, and adjust the appropriate gas supply amount required for each combustion chamber accordingly to reduce the heat consumption by the central individual combustion control method to change the temperature to suppress the coke rise According to the present invention, there is provided a carbonization chamber individual combustion control apparatus.

1 is a configuration diagram of a conventional coke oven supply gas facility.

2 is a diagram illustrating a conventional supply gas adjustment.

3A-3C are graphs illustrating the coal distillation process in a coke oven.

4 is a configuration diagram of a carbonization chamber individual combustion control apparatus according to the present invention.

5 is a graph of a decision for determining the point of dryness according to the present invention.

Explanation of symbols on the main parts of the drawings

10: carbonization chamber 20: combustion chamber

30: rising tube 32: temperature sensor (SENSOR)

33: G.C MAIN 40: Supply gas distribution pipe

41: REVERSING COCK 43: REVERSING WINCH

44: waste valve 50: flow controller

300: temperature detection unit 400: conversion unit

410: transmitting unit 420: receiving unit

500: operation control unit 600: sequence control unit

700: display unit

As a technical means for achieving the above object of the present invention, the apparatus of the present invention is a temperature sensing unit for measuring the temperature of the coal gas in the carbonization chamber individual combustion control apparatus according to the temperature change, installed in the riser bent portion ; A signal transmitter including a transmitter for converting the detected signal of the temperature sensor into a current signal and transmitting the signal to a temperature signal from the transmitter; Continuously input the temperature signal of the signal transmission unit for a predetermined time, and determine the maximum temperature and the timing of the coal gas in accordance with this temperature signal, and counting the time at this maximum temperature time point, the coefficient value is set in advance An arithmetic and control unit which compares the completion time (= time taken from the highest temperature point to the completion time) and determines the point of time as the point of contact at the completion of drying, and provides the determination result; A combustion sequence control unit which controls the supply and interruption of the combustion gas in accordance with the determination result from the operation control unit; And a controller installed in the supply gas distribution pipe and controlling the supply of the combustion gas supplied to the combustion chamber by being opened and closed according to the supply and shutoff control of the combustion sequence control unit.

Hereinafter, the configuration and operation of the carbonization chamber individual combustion control apparatus according to the temperature change according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

4 is a configuration diagram of a carbonization chamber individual combustion control apparatus according to the present invention, referring to FIG. 4, the carbonization chamber individual combustion control apparatus according to the present invention is installed in the riser bend portion to measure the temperature of the coal gas The sensor 300 includes a transmitter 410 for converting the detected signal of the temperature sensor 300 into a current signal, and a receiver 420 for converting the signal from the transmitter 410 into a temperature signal. The signal transmitter 400 and the temperature signal of the signal transmitter 400 are continuously input for a predetermined time, and the maximum temperature tmax and the time point of the coal gas are determined according to the temperature signal. When the drying time is elapsed by counting the time at this highest temperature point and comparing the preset dry completion time (= time required to complete the drying at the highest temperature point), this time is determined by At a flower shop And a combustion sequence control unit 600 for controlling the supply and shutoff of the combustion gas in accordance with the determination result from the operation control unit 500, and a supply gas portion. It is installed in the pipe 40, it is composed of a controller 50 for controlling the supply of the combustion gas supplied to the combustion chamber is opened and closed in accordance with the supply and shutdown control of the combustion sequence control unit 600.

Here, the signal receiving unit 420, the operation control unit 500, the combustion sequence control unit 600 and the display unit 700 of the signal transmission unit 400 may be installed in the central control room PC control panel when applied to the actual site.

The operation control unit 500 provides dry state information including temperature value, time and dry completion, and the carbonization chamber individual combustion control device displays a display of the dry state information from the operation control unit 500 on the screen. It further includes.

5 is a graph of a decision for determining the point of dryness according to the present invention.

Based on the accompanying drawings, the operation of the preferred embodiment of the present invention configured as described above will be described in detail below.

Referring to the operation of the carbonization chamber combustion control apparatus according to the temperature change according to the present invention with reference to Figures 4 to 7, first, when the coal is charged into the individual carbonization chamber 10, coal gas of the dry distillation process is generated and coal The gas is collected through the rising pipe 30 and the indicating main 33 and sent to the Hwaseong plant.

At this time, before the carbonization chamber individual combustion control apparatus according to the present invention is operated, charging coal and charging conditions are input to calculate the input calorific value according to the input and calculate a target temperature. Then, the temperature of the gas is measured at the riser bend, the target temperature is compared with the measured temperature, the calorie corresponding to the difference is calculated, and the process of controlling the quantity supply corresponding to the calorie is performed. While the present invention is applied to determine the time of completion of dry distillation to cut off the gas supply, which will be described later.

First, when the temperature sensor 300 installed in the elbow pipe portion continuously measures the temperature of coal gas and provides the signal to the signal transmitter 400, the transmitter 410 of the signal transmitter 400 detects the temperature. The detection signal of the unit 300 is converted into a current signal and transmitted, and the signal receiving unit 420 of the signal transmitting unit 400 converts the signal from the transmitting unit 410 into a temperature signal and provides it to the operation control unit 500. do.

The operation control unit 500 continuously receives the temperature signal of the signal transmission unit 400 for a predetermined time, and determines the maximum temperature tmax of the coal gas and the time point according to the temperature signal, and the highest value. Time is counted at the temperature point, and this count value compares the preset completion time (= time required to complete the completion at the highest temperature point). The determination result is provided to the combustion sequence control unit 600 and the display unit 700.

Here, in the case of applying to the actual site, the signal receiving unit 420, the operation control unit 500, the combustion sequence control unit 600 and the display unit 700 of the signal transmission unit 400 may be installed in the central control room PC control panel. .

In other words, the operation control unit 510 of the PC control panel of the central control room calculates the maximum temperature value Tmax of the continuous coal gas temperature, where the method of calculating the maximum temperature value is a time for which the temperature value continuously input is set. For example, the maximum temperature value is calculated while comparing the average drying time from the start of dry distillation, and the time at this time is calculated.

At this time, the time is counted when the highest temperature value is detected. Then, the time required from the highest temperature point to the completion of the dryness is set to the dry completion time, for example, 3 hours and 30 minutes, and the dry completion time is determined by determining whether the count value has elapsed from the preset dry completion time. When elapsed, it is determined that the point of time is the hot spot of completion of dry distillation, and the determination result is provided to the combustion sequence control unit 600 and the display unit 700, respectively.

That is, when the operation control unit 500 of the central cab determines the time of a fire due to the maximum temperature of coal gas and sends the determination result to the sequence control unit 600, the sequence control unit 600 converts the electric signal into a flow controller 50. The flow controller closes the valve by the control signal of the sequence control unit 600 to block the supply of the combustion gas.

The dryness completion time, which means the time taken from the highest temperature point to the completion of the dryness, is explained through repeated experiments in which the dry point is completed after a certain time after the maximum temperature of coal gas, and is usually set by repeated experiments. Drying is completed 3 to 30 hours after reaching. In addition, the present invention, as shown in the following Table 1 (changes depending on the operation rate and dry state), and measured the completion time of dry distillation according to the operation rate, even in the experiment of the present invention, the point of completion of dry distillation is 3 hours to 3 hours 30 minutes Was measured.

In addition, when describing the viewpoint of a fire, generally, the determination of a fire is that the coal gas is generated when the coal is dried at a high temperature, and after a predetermined time (e.g., 3 hours 3 minutes) has passed after the maximum temperature according to the amount of the generated gas, As the temperature drops sharply and the gas temperature drops, the color turns white. This is called the time of completion of dry distillation.

Came on PEAK TIME Relaxation time (N.C.T) NCT-PT 1210 ℃ 16: 10 ± 10 19: 10 ± 10 3:00 to 3:20 1220 ℃ 15: 40 ± 10 18: 50 ± 10 3:00 to 3:30 1230 ℃ 15: 00 ± 10 18: 00 ± 10 3:00 to 3:20 1250 ℃ 14: 10 ± 10 17: 10 ± 10 3:00 to 3:20

In Table 1, "PEAK TIME" refers to the highest temperature time point, "N.C.T."

Meanwhile, the operation control unit 500 of the central cab PC transmits the elapsed signal according to the coal gas temperature to the display unit 700 such as a monitor to display the dry state as a trend. In this case, the signal can be transmitted as the signal 2 at the maximum temperature and the signal 3 at the flash point and the extrusion point, and these signals can be displayed on the monitor trend.

The time displayed on the display unit 700 will be described briefly. In the operation control unit 500 of the central cab, the maximum temperature tmax and the maximum temperature arrival time Ts are calculated and the maximum time arrival time Ts is measured. The time that sums up 3 hours and 30 minutes, that is, the reference time, that is, "Ts +3: 30" is calculated, and signal 3, which is the time of completion of dry distillation, is displayed on the monitor trend.

Thereafter, the combustion sequence control unit 600 controls the supply and shutoff of the combustion gas to the on / off valve 52 according to the determination result from the operation control unit 500, and the on / off valve installed in the supply gas distribution pipe 40. Reference numeral 52 is to control the supply of the combustion gas is opened and closed in accordance with the supply and shut-off control of the combustion sequence control unit 600.

On the other hand, if the extrusion is completed after a certain time, the flow rate controller 50 is opened by receiving a signal from the central control room PC control panel 500 is supplied with a normal flow rate.

If the above description is briefly described as an example, when the carbonization chamber is charged with a standard distillation time of 20 hours and 10 minutes at an operating rate of 113.6% as an example of the actual industry, coal gas is generated and the first signal, When the coal gas temperature reaches the maximum temperature (t max: 15 hours) as the dry distillation progresses, it sends 2 signals, and after 3 hours 30 minutes (18 hours 30 minutes) The signal 3, which is a dry flow completion signal, is sent and displayed as dry completion on the monitor trend, and the supply of the combustion gas to the controller 50 is blocked by the sequence controller. In other words, it is possible to reduce the flow rate of the combustion gas 1 hour 40 minutes that is supplied unnecessarily after drying.

According to the present invention as described above, by measuring the temperature of the coal gas during the coke production in the coke oven, the dry state progress can be confirmed on a monitor, and after the completion of the drying point, the supply of combustion gas to the individual combustion chamber is blocked. It can reduce unnecessary combustion gas consumption by only moxibustion due to residual heat, which can lower the heat source unit and prevent over-drying due to the heat supply continuously after the completion of dry distillation, thus obtaining a very practical effect that contributes to the improvement of coke quality. Can be.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (2)

In the carbonization chamber individual combustion control apparatus according to the temperature change, A temperature sensing unit 300 installed at a rising pipe curved tube to measure a temperature of coal gas; The signal transmitter 400 includes a transmitter 410 for converting the detected signal of the temperature sensor 300 into a current signal, and a receiver 420 for converting the signal from the transmitter 410 into a temperature signal. ; Continuously input the temperature signal of the signal transmission unit 400 for a predetermined time, and determine the maximum temperature (tmax) and the time point of the coal gas in accordance with this temperature signal, by counting the time at this time point When the count value is compared with a preset completion time (= time taken from the highest temperature point to completion of the completion), and the completion time has elapsed, it is determined that this time point is the ignition point at the completion of dry distillation and the judgment result is determined. Providing arithmetic and control unit 500; A combustion sequence control unit 600 for controlling the supply and shutoff of combustion gas in accordance with the determination result from the operation control unit 500; And The controller is provided in the supply gas distribution pipe 40, the controller 50 for opening and closing according to the supply and shut-off control of the combustion sequence control unit 600 to control the supply of the combustion gas supplied to the combustion chamber. Carbonization chamber individual combustion control device according to the change. The method of claim 1, wherein the operation control unit 500 It provides dry state information including temperature value, time and dry state completion, The carbonization chamber individual combustion control device And a display unit for displaying dry state information from the operation control unit 500 on a screen.