What is explosion door in boiler?
A door in a furnace or boiler setting designed to be opened by a predetermined gas pressure.
What is CFBC boiler?
The Circulating Fluidized Bed Combustion(CFBC) boiler is the most advanced steam generatortechnology. Among many distinguishable advantages of CFBC boilers, itachievesvery low NOx and Sox emission by capturing sulfur contents of the fuel during the burning process.
What is the difference between CFBC and Afbc boiler?
AFBC means atmospheric fluidized bed combustion, where the furnace pressure is atmospheric pressure. CFBC boiler stands for circulating fluidized bed combustion boiler, the furnace is pressurised and the furnace gas is recirculated to capture the unburnt carbon, to increase the thermal efficiency of the boiler.
How does a CFBC boiler work?
Boiler in which coal or biomass is burnt in an environment of high concentration of bed material (mineral matter) derived from combustion of coal retained by using cyclone / other means. In the CFBC boiler, ash leaving with flue gas is recirculated to combustion zone. This ash reduces combustion temperature.
What are the boiler interlocks?
It’s a wiring arrangement that prevents your boiler from heating your home when there’s no need for it, for example, if the temperature that you set on the thermostat has been reached. For combi boilers, interlock is usually achieved by using a room thermostat. This could include a standard or digital thermostat.
What is boiler protection?
The G5xxx Boiler Monitoring family provides a range of advanced systems for control and maintenance of all kinds of boilers. A common feature of all the systems is the dynamic load dependent monitoring. This allows an early diagnosis of problems under build up long before the trouble escalates.
What is meant by boiler trip?
Well a Boiler Trip is when an unusual operating condition occurs and a safety device such as a switch is used to shut the boiler down so the operator needs to investigate why the boiler tripped then perform maintenance or repair to clear the unsafe condition that caused the boiler trip so it does not repeat.
Under which conditions can interlocks be used in boiler control?
For oil and gas fired boiler the interlocks are burner will not fire until flame is not sensed, failure of instrument air pressure, Drum level low, FD fan failure, fuel gas pressure low, oil pressure low. Boiler interlocks depend on the type of boilers. v)Multiple Fuel Gas Fired Boiler etc. vi)Fuel gas pr.
What is fan interlock?
In residential air handler/fan coils, it is common to use a high-voltage interlock between the blower and the electric heat strips to ensure that the blower comes on whenever the heat is on. You CANNOT power them through a typical relay like a blower relay or board, generally rated for 15 amps or less.
What is difference between interlock and trip?
An interlock may prevent an action until another action has occurred or may cause another action to happen automatically. Trips are for protection circuits.
What is master fuel trip?
Master fuel trip, MFT as we keep on mentioning is the term we use to kill all fuel sources which cause combustion, not only limited to start-up oil igniters but also including the coal conveying systems. All pneumatic shut-off valves shall close, if possible at lightning speed, and all coal conveyor VFDs must stop.
What is tripping of turbine?
A turbine trip is the emergency shutdown of a power-generation turbine due to unexpected events. turbine overspeed condition where the turbine accelerates over its design speed, typically by 10% low vacuum in the secondary cooling loop, or condenser. lubrication failure for any number of reasons.
What are the trips provided in the auxiliary boiler?
An auxiliary boiler then looks after secondary roles such as heating of fuel/cargo, power generation, fresh water generator, operating steam-driven pumps and other heating duties….Important Alarms and Trips on Marine Boilers.
| Functions | Audible and Visual | Actions |
|---|---|---|
| 7) Low feed-water pressure | Alarm | Stand-by pump start |
What is the importance of boiler on board the ship?
Boilers are one of the essensial equipments onboard ships. It’s purpose is to provide heating to the the main deisel propulsion engine, to the bunker F.O. tanks(to make it less viscous for transfer purposes as well as easy ignition).
Which type of boiler used in ships?
The watertube boiler is employed for high-pressure, high-temperature, high-capacity steam applications, e.g. providing steam for main propulsion turbines or cargo pump turbines. Firetube boilers are used for auxiliary purposes to provide smaller quantities of low-pressure steam on diesel engine powered ships…..
Why safety valves are required on boiler?
In steam systems, safety valves are typically used for boiler overpressure protection and other applications such as downstream of pressure reducing controls. Although their primary role is for safety, safety valves are also used in process operations to prevent product damage due to excess pressure.
Where is the safety valve on a boiler?
boiler steam drum
What is difference between TSV and PSV?
[1] When a PSV has been termed TSV, it immediately implies that the relieving scenario is “liquid expansion due to temperature”. Further, >90% of such PSV are located on cooling water outlet side of heat exchanger.
What is difference between safety valve and relief valve?
Relief Valves are designed to control pressure in a system, most often in fluid or compressed air systems. These valves open in proportion to the increase in system pressure. Unlike relief valves, safety valves open immediately and completely to avoid a disaster, rather than to control the pressure of a system.
What are two types of relief valves?
The three basic types of pressure-relief valves are conventional spring loaded, balanced spring loaded, and the pilot operated.