燃烧起动过程：当控制系统在待命的状态并接收到输入启动命令时，将进入燃烧运行状态。控制系统行自检，之后进行吹扫，变频器输出信号控制风机的旋转，气流由低速变为高速，再变为低速。新鲜空气吹过燃烧炉盘，以保证炉内没有残留燃气的存在，保证点火过程的可靠。
Combustion start process: when the control system is in standby state and receives the input start command, it will enter the combustion operation state. The control system carries out self inspection first, and then carries out purging. The inverter outputs signal to control the rotation of the fan, and the air flow changes from low speed to high speed, and then to low speed. Fresh air is blown through the combustion plate to ensure that there is no residual gas in the furnace and the ignition process is safe and reliable.
具体操作是变频器先启动，PLC模拟输出信号使变频器频率从起动设定频率开始上升，达到一定频率后再保持一定时间，然后再次下降，完成启动前的吹扫。之后发出点火信号，高压点火器工作，同时点火管道阀门打开，小火点燃。
The specific operation is that the frequency converter starts first, the PLC Analog output signal makes the frequency of the frequency converter rise from the starting set frequency, and then maintain a certain time after reaching a certain frequency, and then drop again to complete the purging before starting. After that, the ignition signal is sent out, the high-pressure igniter works, and the ignition pipeline valve is opened at the same time, and the small fire is ignited.
通过紫外线传感器的检测到期小火点燃后，打开主燃气阀门。这时RCO催化燃烧炉盘进行有焰燃烧，直到检测温度信号达到设定的点火关闭温度，点火阀门关闭，完成点火过程，进入到催化燃烧调节阶段。
After the small fire is ignited, the main gas valve is opened through the detection of ultraviolet sensor. At this time, the RCO catalytic combustion furnace plate carries out flame combustion until the detection temperature signal reaches the set ignition off temperature, the ignition valve is closed, the ignition process is completed, and the catalytic combustion regulation stage is entered.

该系统中燃气/空气比的调节由零压阀实现。当风机风量改变时，燃料/空气比也可以改变，以满足RCO催化燃烧器的燃烧要求。起动时，通过调节输出变频器的频率，就能达到点火时要求的从有焰燃烧到催化燃烧的燃/空比的变化。
In this system, the gas / air ratio is regulated by zero pressure valve. When the fan air volume changes, the fuel / air ratio can also be changed to meet the combustion requirements of RCO catalytic burner. When starting, the change of fuel / air ratio from flame combustion to catalytic combustion can be achieved by adjusting the frequency of output frequency converter.
燃烧器温度调节可以通过文本显示器的键盘输入，改变变频器的输出信号频率，调节适当的风量。当风量变大，燃烧温度不能超过设定值，则PLC控制变频器降低输出频率，减少出风量来稳定燃烧器的温度。
The burner temperature can be input through the keyboard of the text display to change the output signal frequency of the frequency converter and adjust the appropriate air volume. When the air volume becomes larger and the combustion temperature cannot exceed the set value, PLC controls the frequency converter to reduce the output frequency and the air volume to stabilize the temperature of the burner.
如果变频器输出频率低于设定值，出口风量仍高于设定值，PLC开始计时；如果在一定时间内降设定值，则PLC放弃计时，继续变频调速运行；如果在一定时间内温度仍然高于设定值，PLC将继续调整，直到达到设定值。由PLC经PID运算后控制变频器的频率输出；如温度不够，则频率上升，延时保持一定时间。
If the output frequency of the frequency converter is lower than the set value, and the outlet air volume is still higher than the set value, PLC starts timing; If it falls to the set value within a certain period of time, PLC will give up timing and continue to operate with variable frequency speed regulation; If the temperature is still higher than the set value in a certain period of time, PLC will continue to adjust until it reaches the set value. The frequency output of frequency converter is controlled by PLC after PID operation; If the temperature is not enough, the frequency will rise and the delay will be kept for a certain time.
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