Furnace Guard Supervisory System (FSSS)

FSSS(Furnace Safeguard Supervisory

System )

BY: JIGYASA SINGH EC-B

HIGHLIGHTS

About NTPC. Brief overview of coal power plant. Coal to electricity. FSSS- Introduction. Significance of FSSS. Operation of FSSS. FSSS protection to boiler Care of FSSS. 

About NTPC

NTPC, India's largest power company, was set up in 1975 to accelerate power development in India. It is emerging as an ‘Integrated Power Major’, with a significant presence in the entire value chain of power generation business. NTPC ranked 337th in the ‘2012, Forbes Global 2000’ ranking of the World’s biggest companies. With a current generating capacity of 39,174 MW,  NTPC plans to become a 128,000 MW company by 2032.

Brief overview of Coal Power Plant

A power station (also referred to as a generating station, power plant, or powerhouse) is an industrial facility for the generation of electric power.

A coal-fired power station produces electricity by burning coal to generate steam.

Coal to Electricity

Coal is a fuel that is found in the ground. It is made of the remains of plants that died millions of years ago. Soil piled up on top of the remains and that weight compacted it into a more dense material, called coal. The energy in the coal came from the sun and was stored in the plants. When the coal is burned, it gives up that energy as heat. The coal's heat energy can then be turned into electrical energy. This happens at a power plant.

COAL TO ELECTRICITY

FSSS- Introduction

The Furnace Safeguard Supervisory

System (FSSS) is designed to ensure the execution of a safe, orderly operating sequence in the start up and shutdown of fuel firing equipment and to prevent errors of omission and commission in following such a safe operating procedure.

Significance

FSSS helps in achieving basic objectives repeatedly without error to safe-guard the furnace against hazardous effect by means of:

Ensuring certain Safe condition established and proved in the furnace before light up can proceed.

In the case of unstable furnace flame condition, to help the operator to introduce additional ignition energy.

In the event of flame failure fuel supply is immediately cut off and furnace, air and gas paths purged before any attempt is made to relight the burners.

FSSS- Operation

Furnace safeguard supervisory system comprises of controls, indications, logic to carry out following:

To start and complete furnace purge when all technological conditions are fulfilled.

To start and monitor igniters. To start warm up or heavy oil guns when

permissive condition exits. The guns are allowed to burn so long as proper combustion conditions are ensured.

Continued….

To start mills and coal feeders when safe conditions exist.

To trip out mills and coal feeders when satisfactory conditions cease.

To trip out all boiler fines when boiler safety is threatened

To monitor furnace flame. To start and stop igniter and scanner fans. To indicate auxiliary and fuel air damper

close and modulation indications.

Continued….

To release damper interlocks for secondary air control.

To provide boiler trip signal to other equipment such as PA fans, turbine generator etc.

BOILER OPERATION

COMBUSTION SYSTEM

FSSS Protection to BOILER

By tripping out all fuel i/p under the following condition :

Loss of D.C. to FSSS Furnace pressure inadequate. Less than fire ball load and loss of A.C. on

any elevation in service. Drum level high or low. Flame failure trip. Both PA fan off. Low air flow.

Care of FSSS

It is essential that all parts of the Furnace Safeguard Supervisory System are in service at all times, if the system is to provide protection for which it is designed. Proper maintenance and periodic inspection of the system and associated hardware is essential for continued reliable operations.

THANK YOU