燃燒起動過程：當控制系統(tǒng)在待命的狀態(tài)并接收到輸入啟動命令時，將進入燃燒運行狀態(tài)。控制系統(tǒng)先進行自檢，之后進行吹掃，變頻器輸出信號控制風機的旋轉，氣流由低速變?yōu)楦咚?，再變?yōu)榈退佟Ｐ迈r空氣吹過燃燒爐盤，以保證爐內沒有殘留燃氣的存在，保證點火過程的安全可靠。
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.
具體操作是變頻器先啟動，PLC模擬輸出信號使變頻器頻率從起動設定頻率開始上升，達到一定頻率后再保持一定時間，然后再次下降，完成啟動前的吹掃。之后發(fā)出點火信號，高壓點火器工作，同時點火管道閥門打開，小火點燃。
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.
通過紫外線傳感器的檢測到期小火點燃后，打開主燃氣閥門。這時RCO催化燃燒爐盤進行有焰燃燒，直到檢測溫度信號達到設定的點火關閉溫度，點火閥門關閉，完成點火過程，進入到催化燃燒調節(jié)階段。
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.

該系統(tǒng)中燃氣/空氣比的調節(jié)由零壓閥實現(xiàn)。當風機風量改變時，燃料/空氣比也可以改變，以滿足RCO催化燃燒器的燃燒要求。起動時，通過調節(jié)輸出變頻器的頻率，就能達到點火時要求的從有焰燃燒到催化燃燒的燃/空比的變化。
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.
燃燒器溫度調節(jié)可以通過文本顯示器的鍵盤輸入，改變變頻器的輸出信號頻率，調節(jié)適當?shù)娘L量。當風量變大，燃燒溫度不能超過設定值，則PLC控制變頻器降低輸出頻率，減少出風量來穩(wěn)定燃燒器的溫度。
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.
如果變頻器輸出頻率低于設定值，出口風量仍高于設定值，PLC開始計時；如果在一定時間內降至設定值，則PLC放棄計時，繼續(xù)變頻調速運行；如果在一定時間內溫度仍然高于設定值，PLC將繼續(xù)調整，直到達到設定值。由PLC經PID運算后控制變頻器的頻率輸出；如溫度不夠，則頻率上升，延時保持一定時間。
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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