SU779743A1

SU779743A1 - Method of monitoring flame presence in combustion hox

Info

Publication number: SU779743A1
Application number: SU772469307A
Authority: SU
Inventors: Борис Калинович Левин; Владимир Дмитриевич Ферманьян
Original assignee: Краснодарский политехнический институт
Priority date: 1977-04-04
Filing date: 1977-04-04
Publication date: 1980-11-15

Description

Изобретение относится к контролю процесса горения топлива и, в частное.) ти, к контролю наличия пламени в топках топливоиспользующих установок во всем диапазоне изменения тепловых нагрузок от режима горячего простоя до максимальной.The invention relates to the control of the combustion process of fuel and, in particular.) To the control of the presence of flame in the furnaces of fuel-using plants in the entire range of changes in heat loads from hot downtime to maximum.

Известны способы контроля наличия пламени с помощью датчика интенсивности теплоотдачи в топке, в качестве которого используется капилляр £1} ..Known methods for monitoring the presence of a flame using a heat transfer intensity sensor in a furnace, which uses a capillary £ 1} ..

Недостаток способа - низкая надёж- . ность, связанная с изменением интенсивности теплоотдачи на различных режимах теплоиспользующих установок .The disadvantage of this method is low reliability. This is related to a change in the heat transfer intensity at different modes of heat-using plants.

Из известных способов· наиболее близким является способ контроля наличия пламени в топке путем измерения с помощью датчика интенсивности теплоотдачи в топке и изменения положения датчика по командному сигналу. Положение датчика в амбразуре топки изменяется по сигналу от регулятора расхода топлива [2].Of the known methods, the closest is a method for monitoring the presence of a flame in a furnace by measuring with a sensor the heat transfer intensity in the furnace and changing the position of the sensor by a command signal. The position of the sensor in the embrasure of the furnace changes according to the signal from the fuel consumption regulator [2].

Недостаток этого способа - низкая надежность и. быстродействие контроля во всем диапазоне изменения тепловых на грузок, включая режим горячего простоя, в связи с неоднозначностью температуры датчика и воспринимаемой им интенсивности теплоотдачи в топке от сигнала расхода топлива во всем диапазоне нагрузок.The disadvantage of this method is the low reliability and. control performance over the entire range of thermal loads, including the hot downtime, due to the ambiguity of the sensor temperature and the heat transfer rate perceived by it in the furnace from the fuel consumption signal in the entire load range.

Цель изобретения - повышение надежности и быстродействия контроля.The purpose of the invention is to increase the reliability and speed of control.

Цель достигается тем, что дополнительно измеряют температуру датчика и в качестве командного сигнала используют преобразованный сигнал по измеренной температуре датчика.The goal is achieved by the fact that they additionally measure the temperature of the sensor and use the converted signal according to the measured temperature of the sensor as a command signal.

На чертеже Изображена блок-схема устройства^ реализующего способ контроля наличия. пламени в топке.The drawing shows a block diagram of a device ^ implementing a method of monitoring availability. flame in the firebox.

Датчик 1, имеющий возможность изменения положения в амбразуре топки, соединен с устройством контроля наличия пламени 2,которое в свою очередь связано с устройством 3 сигнализации и зашиты топ-The sensor 1, with the ability to change the position in the embrasure of the furnace, is connected to a device for monitoring the presence of flame 2, which in turn is connected to an alarm device 3 and the top

·' 7 79743 ки теплоиспользующей установки. Температурный датчик 4, измеряющий температуру датчика 1, связан с регулятором 5, который через исполнительный механизм 6 воздействует на положение датчиков 1 и 4.· '7 79743 ki heat-using installation. The temperature sensor 4, measuring the temperature of the sensor 1, is connected to the controller 5, which through the actuator 6 affects the position of the sensors 1 and 4.

тенсивности преобразованного сигнала по измеренной температуре повышает надежность и быстродействие контроля во всем диапазоне изменения тепловых на_s грузок, включая режим горячего простоя.The intensity of the converted signal according to the measured temperature increases the reliability and speed of control over the entire range of changes in the thermal load _s , including the hot standby mode.

Способ контроля наличия пламени в топке осуществляется следующим образом.The method of controlling the presence of flame in the furnace is as follows.

Датчик 1 измеряет интенсивность теплоотдачи в топке и в случае погашения пламени устройство контроля 2 выдает сигнал на вход устройства ”3 сигнализации и защиты топки теплоиспользующей установки.Sensor 1 measures the heat transfer intensity in the furnace and, in case of flame off, the control device 2 gives a signal to the input of the device 3 of the alarm and protection of the furnace of the heat-using installation.

Одновременно сигнал с температурного датчика 4, находящегося в той же течке топочного объема, что и датчик 1, поступает на вход регулятора 5. Преобразованный регулятором 5 сигнал используется в качестве командного для изменения с помощью исполнительного механизма 6 положения датчиков 1 и 4 с тем, чтобы поддерживать температуру и, соответственно, величину теплового потока постоянным.At the same time, the signal from the temperature sensor 4, located in the same heat of the furnace volume as the sensor 1, is fed to the input of the controller 5. The signal converted by the controller 5 is used as a command to change the position of the sensors 1 and 4 by means of an actuator 6 so that maintain the temperature and, accordingly, the heat flux constant.

Таким образом, дополнительное измерение температуры датчика и использование в качестве командного сигнала для изменения положения датчика изменения ин-Thus, additional measurement of the temperature of the sensor and use as a command signal to change the position of the sensor changes in-

Claims

I. The invention relates to controlling the combustion process of a fuel and, in particular, it; control of the presence of flame in the fireboxes of fuel dispensing installations throughout the entire range of changes in thermal loads from the hot mode to the maximum. There are known methods for controlling flame using a heat transfer intensity sensor in a furnace, capillary is used as a boiler. The disadvantage of this method is low reliability associated with a change in heat transfer intensity in various modes of heat utilization of installations. Of the known methods, the most close A method of controlling the presence of flame in the furnace by measuring the heat transfer rate in the furnace with a sensor and changing the position of the sensor according to a command signal. The position of the sensor in the embrasure of the furnace varies with the signal from the fuel consumption regulator 2. The disadvantage of this method is low reliability and. control speed over the entire range of heat load conditions, including the hot mode, is simple, due to the ambiguity of the sensor temperature and its perceived heat transfer intensity in the firebox from the fuel consumption signal over the entire load range. The purpose of the invention is to increase the reliability and speed of control. The goal is achieved by additionally measuring the sensor temperature and using the converted signal as a command signal using the measured sensor temperature. The drawing shows a block diagram of the device implements the method of controlling the presence. flame in the firebox. Sensor 1, having the ability to change the position in the embrasure of the firebox, is connected to the device for monitoring the presence of flame 2, which is in turn connected to the device 3 for alarm and is sewn up top3:. 77 CI tepispolzuyuschey installation. The ToNJnetrature sensor 4, which measures the temperature by sensor 1, is connected with the regulator 5, which through the fire mechanism 6 acts on the position of the sensors 1 and 4. The method of controlling the presence of flame in the furnace is as follows: Sensor 1 measures the heat transfer intensity in the furnace and In case of extinguishing the flame, the control unit 2 sends a signal to the input of the signaling device 3 and protection of the heat-burning installation furnace. At the same time, the signal from the temperature sensor 4, which is in the same thin furnace volume as sensor 1, is fed to the input of controller 5. The signal converted by regulator 5 is used as a commanding change using the actuator Htcotfa 6 of the position of sensors 1 and 4 in order to maintain the temperature and, COOTS naturally, the amount of heat flow is postoynngm. Thus, additional measurement of the sensor temperature and IC {The use of a x-cmd signal to change the sensor's change in the intensity of the transformed signal based on the measured temperature increases the reliability and speed of control over the entire range of changes in thermal loads, including the hot mode. Claims of Invention The method of controlling the presence in the furnace by measuring with the sensor the intensity of heat transfer in the furnace and changing the position of the sensor according to the command signal. characterized in that, with a chain to increase the reliability and control operation over the entire range of variation of heat loads, including the hot mode, simply measure the sensor temperature and use the converted signal as a command signal using the measured sensor temperature. Shtochniki information n {M1NYATye during the examination 1.Avtorskoe certificate of the USSR № 408107, cells .. F 23 t4 5/24, - 1971.

2. Author's testimony of the USSR No. 577359, F 23 N 5/24, 1975.

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