Azbil Corporation

Yuichi Kumazawa

Katsumi Morikawa

Tomoya Nakata

Shigeki Ishii

Kayo Suzuki

Takeshi Nishiyama

Satoru Yamagishi

Takashi Watanabe

Satoshi Kadoya

A flame detection system includes: a UV sensor that serves as a flame sensor detecting a UV ray generated by a flame; an application voltage generation unit that applies a driving voltage to the UV sensor; a discharge detection unit that detects a discharge in the UV sensor; a discharge count unit that counts the number of detected discharges; a discharge probability calculation unit that calculates a discharge probability on the basis of the number of discharges counted by the discharge count unit and the number of times the driving voltage is applied; a UV intensity determination unit that determines an intensity of the UV ray on the basis of the discharge probability; and a determination result output unit that outputs the intensity of the UV ray determined by the UV intensity determination unit via display or communication.

Flame detection system and flame level detection method

A maintenance management device that integrates point values for each element that exerts thermal stress on a high-temperature furnace, with an operation time of the high-temperature furnace as an integration period, in which the point values are obtained by converting actual values of a thermal stress of each of elements into a reference thermal stress. A point value obtained by converting a limit value of the thermal stress with which the high-temperature furnace can normally operate into the reference thermal stress is set as a lifetime thermal stress, the point value integrated with the operation time of the high-temperature furnace as the integration period is set as an accumulated thermal stress, and a remaining lifetime of the high-temperature furnace equipment is predicted from the result of subtracting the accumulated thermal stress from the lifetime thermal stress.

Maintenance management device and method for high-temperature furnace equipment

A combustion control system that collects and accumulates, at predetermined intervals, combustion controlling information including at least a signal indicating an operating state of an ignition device, a signal indicating the supplying state of fuel to a pilot burner, a signal indicating the supplying state of fuel to a main burner, a signal indicating the supplying state of air to the main burner, a flame detection signal indicating the strengths of the flames of the burners (the pilot burner and the main burner), and information indicating presence or absence of the flames determined based on the value of the flame detection signal, and displays the combustion controlling information as trend data of combustion control in a graph in such a form that the relationship between time zones of the combustion sequences from the start of a combustion device to normal combustion and the trend data is understandable.

Combustion system

A combustion controlling system according to the present invention provides a signal path for transmitting the normal combustion signal SB output from the master device to the transmission line through cascade-connected slave devices. Then, the combustion controlling system determines whether each of the slave devices outputs the normal combustion signal SB to the subsequent device based on whether there is a flame of the corresponding burner, or not, during the combustion of burners, and the master device closes a safety shutoff valve on the condition that an input of a normal combustion signal SBo from a transmission line is stopped.

Combustion controlling system

A combustion controlling system according to the present invention provides a signal path for transmitting an ignition preparation signal SA output from a master device to a transmission line through cascade-connected slave devices. Then, each of the slave devices determines whether each of the slave devices outputs the ignition preparation signal to a subsequent device, or not, based on whether there is a flame of the corresponding burner, or not, at the time of igniting the burners, and the master device opens a safety shutoff valve on the condition that an ignition preparation signal SAo has been input from the transmission line.

Growing community of inventors

Tokyo, Japan

Yuichi Kumazawa