| System Overview
Boiler Furnace Safety Monitoring System, or FSSS (Furnace Safeguard Supervisory System), is to ensure the safe operation of boiler-critical systems, which started in the boiler, and stop running all stages of continuous monitoring of the boiler operating parameters, in accordance with provisions of Ex order security conditions, continually carry out logic judgment and calculation, the corresponding interlock device through the combustion facilities in accordance with established procedures to complete the necessary operations to avoid explosive air - in the fuel mixture accumulated inside the furnace and flue, and boiler in the event of endangering the safety of working conditions , entered the chamber quickly cut off all fuel to prevent the occurrence of explosion of a furnace
Block diagram of a system
Furnace Safety Monitoring System (FSSS) mainly by the operating station, operation panels, the main control cabinet, ignition control system, flame detector and cooling air system, and other components. Including the fuel system, throttle bodies monitoring the implementation, chamber pressure, drum level, the blower fan which, by the door, and other signal conditioning warm water monitoring, as well as with DCS communications. System structure indicative figure:
Boiler Furnace Safety Monitoring System (FSSS)
The main function system
main fuel tripping MFT (Main Fuel Trip)
fuel oil Trip OFT
oil leak test system
furnace Purge
oil combustion system management (signal detection and control)
pulverized coal combustion system management (signal detection and control)
rapid load-shedding Fast Cut Back
by load Run Back
signal detection and extinguishing the flame protection
alarm and display (node failure, the furnace pressure drum water level alarm limits, combustion instability alarm.)
flame detector cooling wind management
and DCS Communications
controlled ignition (Local / Remote)
MFT first memory of the accident, analysis shows
accident causes chronicles functional movements (SOE Sequence Of Events)
recollections functional simulation curve
FSSS system workstations main technical parameters
analog sampling resolution of 1 / 4096
analog sampling period 20 ms/16 channel
switching response time of less than 3 ms
MFT output Contact capacity 10 A/220V AC
logic signal output tap capacity 0.5 A/24V DC
work Power AC 220V ± 10% 50Hz
ambient temperature of 0 ~ 50 ° C
environment humidity 10 to 90% RH
rack size standard or user-defined
system configuration
typical boiler system configuration
|
|
Workstation System
|
The Cabinet
|
Auxiliary
Cabinet
|
Counters flame detector
|
Operating disc
|
Cooling air system
|
flame detector |
Furnace pressure switch
|
LED display devices
|
|
1.40
spray combus
tion
|
75T/H |
According
to user requirements configuration
|
1 |
|
|
1 |
|
4 |
8 |
|
|
130T/H |
1 |
1 |
|
1 |
1 |
8 |
8 |
|
|
220T/H |
1 |
1 |
|
1 |
1 |
12 |
8 |
1 |
|
410T/H |
1 |
1 |
1 |
1 |
1 |
20 |
8 |
1 |
|
470T/H |
1 |
2 |
1 |
1 |
1 |
20 |
8 |
1 |
|
670T/H |
1 |
2 |
1 |
1 |
1 |
24 |
8 |
1 |
|
1000T/H |
2 |
2 |
1 |
1 |
1 |
32 |
8 |
1 |
For hedge combustion, W flame, the U-shaped flame boiler system configuration, according to the layout burner determine the quantity of each set of equipment. List of equipment configuration can be user requirements under design.
Supporting users to provide the following equipment:
FSSS workstations, and communication interfaces Annex
logic control the cabinets, auxiliary cabinets and I / O Interface
power counters and operating panels
flame detector counters and flame detection devices
flame detector cooling air system
fuel systems: fuel pressure switch, the fuel pressure switch, fuel temperature switch, the mother of oil jumped valve, the valve such as recycling
ignition control system (see NDIS Ignition Control System)
system for the implementation of standards:
Electricity Power Industry Ministry Designing Institute <thermal power plant boiler furnace safety monitoring system technical specifications >(C-RK-95-52)
The National Association of Fire <multi-burner furnace, boiler explosion / implosion standards> (NFPA 8502)
with the relevant standards continue to improve and update, the system will implement the latest standards. |
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