Core Components of a Regenerative Thermal Oxidizer

1) Emergency Discharge Valve 

This valve is a normally open valve in case of a power failure. Through the action of the actuator, it can achieve the emergency discharge of waste gas. When the system loses power, this valve will open automatically to realize the emergency discharge of waste gas.

2) Shut-off Valve 

This valve is normally closed in case of a power failure. Through the action of the actuator, when the RTO equipment does not meet the conditions for admitting waste gas, this valve will close, and the emergency discharge valve F-0101 will open to enable the emergency discharge of waste gas. When the RTO equipment meets the conditions for admitting waste gas, this valve will open, and the emergency discharge valve F-0101 will close, allowing the waste gas to enter the RTO for high-temperature oxidation and decomposition, thus achieving the standard emission of waste gas.

3) Pressure transmitter 

This RTO system inlet pressure collection device consists of a pressure collection pipe and a pressure transmitter. This device is the feedback component of the RTO inlet air pressure control main fan. The pressure collection pipeline and pressure transmitter need to drain condensate regularly. Since the inlet pressure transmitter has a small range, it is necessary to avoid damage to the pressure transmitter due to excessive absolute pressure during the operation of the RTO equipment.

4) Fresh air valve 

This valve is a pneumatic regulating valve and is normally open when the power is off. Through the action of the actuator, it supplies fresh air to the RTO.

5) Differential pressure transmitter 

This sensor measures the differential pressure between the inlet and outlet of the RTO furnace body. The pressure sampling pipeline and pressure transmitter need to drain condensate regularly.

6) Main wind turbine 

The primary function of this wind turbine is to connect the exhaust gas sent from the user's production line to the RTO combustion chamber for incineration. To ensure that the equipment runs well, it is necessary to regularly check the lubrication status of the bearing box, check the ground bolts and shock absorber bolts, and check that the cooling fan of the main fan is working well. The main wind turbine is controlled by a frequency converter to control its speed and plays the role of overload, overcurrent, and other protection in the meantime.

7) Blowing fan 

The primary function of this wind turbine is to blow the heat storage layer, blowing area, making the exhaust gas cleaner, better able to meet the standards, and producing high-pressure wind to protect the rotary valve sealing parts in the meantime. It is necessary to ensure that the blowing fan is on when the main fan is on. The blowing fan will start the automatic shutdown program if there is a fault alarm. Please check the status of the motor protector in time, and reset the motor protector in time after eliminating the cause of the fault. To ensure that the equipment runs well, it is necessary to regularly check the lubrication status of the bearing box, check the ground bolts and shock absorber bolts, and check that the cooling fan of the blowing fan is working properly in the meantime.

8) Combustion fan 

The primary function of this wind turbine is to provide combustion air for the combustion system during combustion. During RTO operation, it is necessary to ensure the normal operation of the combustion-assisting fan. If a fault alarm occurs, the automatic shutdown program will be initiated. Please check the status of the motor protector promptly, eliminate the cause of the fault, and reset the motor protector promptly. To ensure the good operation of the equipment, it is necessary to regularly check the lubrication status of the bearing box and inspect the anchor bolts and shock absorber bolts.

For details on the use and maintenance of the fans in items 6), 7), and 8), please refer to the Fan Product Instructions.

9) Rotary valve motor 

The rotary valve motor is driven by a frequency converter, and the speed can be manually set on the touch screen. When the temperature in the oxidation chamber exceeds 300 ℃ during startup or shutdown, the rotary valve motor will automatically operate. When the machine is stopped, the rotary valve motor will remain in operation. If necessary, it can be manually turned off, but before turning off the rotary valve motor, it is necessary to ensure that the temperature of the oxidation chamber is below the shutdown temperature of the oxidation chamber; otherwise, it may damage the sealing device, etc. Regularly check the lubrication of the rotary valve reducer to ensure that the lubricating oil level is normal, and at the same time, ensure that the cooling fan of the rotary valve motor is working properly.

10) Inlet temperature sensor 

This sensor is located at the air inlet of the lower end of the furnace body. Its function is to detect the RTO inlet temperature. When the temperature is greater than the set value of the "inlet high temperature alarm temperature, the system will issue an alarm signal. When the temperature is greater than the set value of the "inlet over-temperature shutdown temperature, the system will issue an alarm signal and trigger the system's automatic shutdown program.

11) Outlet temperature sensor 

This sensor is located at the air outlet at the lower end of the furnace body. Its function is to detect the RTO outlet temperature. When the temperature is greater than the set value of the "outlet high-temperature alarm temperature, the system will issue an alarm signal. When the temperature is greater than the set value of the "outlet over-temperature shutdown temperature, the system will issue an alarm signal and trigger the system's automatic shutdown program.

12) Oxidation chamber temperature sensor 

The oxidation chamber temperature sensor is divided into the main control temperature sensor T-0103A and the comparison temperature sensor T-0103B. The main control temperature sensor T-0103A is used to collect the oxidation chamber temperature signal for oxidation chamber temperature control; the comparison temperature sensor T-0103B is used to collect the oxidation chamber temperature signal for comparison of the correctness of the measured value of the main control temperature sensor T-0103A to prevent the oxidation chamber temperature from being out of control due to the failure of the oxidation chamber temperature monitoring sensor. When the absolute value of the comparison difference between the comparison temperature sensor T-0103B and the main control temperature sensor T-0103A exceeds the allowable deviation range (default value 300℃), the control system will send an alarm to the RTO and enter the shutdown procedure. When the temperature of the main control temperature sensor T-0103A is greater than the set value of the "high-temperature bypass valve opening temperature", the system will automatically open the high-temperature valve to cool the oxidation chamber; when the temperature is greater than the set value of the "oxidation chamber high-temperature alarm temperature", the system will issue an alarm signal; when the temperature is greater than the set value of the "oxidation chamber over-temperature shutdown temperature", the system will issue an alarm signal and trigger the system's automatic shutdown program.

13) High-temperature bypass valve 

This valve is a power outage, normally open valve. It is located between the oxidation chamber and the chimney. Its function is to control the temperature of the oxidation chamber and ensure that the temperature of the oxidation chamber is within a safe range.

14) Burner system 

The device is installed on the upper platform of the RTO oxidation chamber.

Note: Ignition operation cannot be performed without ensuring the safety of the atmosphere in the furnace. If manual ignition is required, it is necessary to ensure that the main fan frequency is 15Hz, the furnace purge time is not less than 10 minutes of air exchange, and natural clean air is blown in for effective chamber sweeping.

There is a separate power supply on the burner control box, which can be powered on separately. Under normal circumstances, it must be powered on all the time, and it can only be turned off separately in an emergency. The remote/local switch on the burner control box needs to be in the remote state at all times to allow the PLC to perform automatic control. Only the debugging state can be switched to the local state, and it must be operated by professionals.

15) Compressed air pressure sensor

This sensor is located at the compressed air access end, and its function is to monitor the compressed air pressure. The automatic regulating valve of this RTO equipment is a pneumatic device. Failure of compressed air during the operation of the equipment will cause the failure of the equipment's safety protection function. Therefore, it is necessary to ensure the continuous and effective supply of compressed air during the operation of the equipment. When the compressed air pressure is lower than the "compressed air alarm setting value, the equipment will issue an alarm signal; when the compressed air pressure is lower than the "compressed air shutdown setting value, the equipment will issue an alarm signal and trigger the system's automatic shutdown program. Condensation water will be generated in the compressed air pipeline, so it needs to be drained regularly.

16) Electrical cabinet

The system control cabinet of this RTO is equipped with AC 380V electrical components. Operators who operate and maintain this electrical cabinet must undergo professional training and obtain relevant electrician qualification certificates. Operators who have not received electrical training are not allowed to inspect or maintain this electrical cabinet. If damage or personal injury is caused by unauthorized use of electricity, it has nothing to do with the supplier of this equipment. The left electrical cabinet is mainly used to install the main power supply and the motor drive part of this RTO equipment. The right electrical cabinet is mainly used to install the PLC and its control part of this RTO equipment. The main operation touchscreen is installed on the cabinet door. The lighting and heat dissipation in the cabinet are interlocked with the cabinet door of the electrical cabinet. When the cabinet door is opened, the lighting is turned on, and the cooling fan stops. To save electricity and ensure good heat dissipation in the cabinet, please close the cabinet door in time.