Boiler furnace safety monitoring system is a burner management and fuel safety combustion control system, referred to as FSSS (furnace safety monitoring system). When the boiler starts to run, the system provides the operators with the judgment logic of furnace purging and the ignition mode that meets the safety specifications. During the normal operation of the boiler, FSSS system closely monitors the working condition information related to the safe operation of the boiler, such as furnace flame, furnace pressure, blower, induced draft fan, drum water level, fuel supply, etc. Operators can intuitively grasp the working condition information of boiler safe operation in FSSS workstation. Once the information of these working conditions is abnormal, FSSS will warn the operators in time, and issue MFT trip instructions to cut off the fuel when necessary, so as to provide reliable technical support for the safe operation of the boiler. At present, it has been widely used in large boilers in power stations, metallurgy, petrochemical and other industries.

I. Main functions

1, programmed ignition;

2, furnace purging;

3. Burner management;

4. Fuel signal detection;

5. Electrical signal detection;

6, furnace pressure detection;

7, the scene signal abnormal alarm;

8, flame detection monitoring and fire protection;

9, fault self-diagnosis;

10, MFT antecedent memory, analysis and display;

1 1. Record and analyze the causes of accident behaviors in sequence;

12, communicating with DCS.

Second, the system configuration

1, logic control system;

2. The upper computer system (including industrial computer, CRT, communication interface and cable) can be selected;

3, local ignition control cabinet;

4. Flame detection device (flame detection probe, signal processing part and special cable);

5. Fire detection cooling air system (optional);

6, furnace pressure switch (furnace pressure high and low pressure switch);

7. Oil gun;

8. Ignition device;

9. Push the actuator;

10, oil angle quick cut-off valve (including fuel valve, bleeder valve, etc. );

1 1. The above configurations can be combined according to the actual situation on site.

Third, the logic control system.

Adopt programmable controllers, such as PLC products of AB Company, MODICON Company, Siemens Company of Germany and Omron Company of Japan. Receive field equipment signals and power plant electrical signals, complete logic functions according to logic requirements, output and control field equipment, and communicate with upper computer.

Fourth, the host system.

High-performance industrial control computer is used to complete screen display, data storage and analysis, accident cause record, accident parameter record, communication with DCS and other functions.

Five, local ignition control cabinet

HEE GDK local ignition control cabinet is the logical control part to realize the sequential action of boiler ignition equipment. It can control the automatic ignition of the ignition equipment and realize the single-step operation of the ignition equipment. The local ignition equipment it mainly controls are: high-energy ignition device, combined combustion device (including propulsion actuator, oil gun, etc. ) and oil angle quick cut-off valve (including fuel valve and bleeder valve).

Functions of local ignition control cabinet:

◇ Control the action of each ignition device in a single step.

◇ Automatically control the action of each ignition device.

◇ indicates the position and working state of each ignition device.

◇ Automatic oil cut-off and alarm when abnormal flameout occurs.

Switching between remote/local operation modes

Six, high-energy ignition device

Seven, improve the execution device

Eight, oil gun series