What is the function of PA fan?

What is the function of PA fan?

Primary Air Fans or PA Fans The main function of the Primary air fan or PA fan is to carry the pulverized coal to the furnace as fuel for combustion. This process is used to create the steam that is the primary process in the thermal power plant.

What is PA line in boiler?

Primary Air Fan ( PA Fan) Primary air is generally the basic amount of air required for complete combustion of fuel and it depends upon the composition and quantity of fuel required by the boiler.

What is FD fan in thermal power plant?

The Induced Draft (ID) fans and Forced Draft (FD) fans provide control for draft and forced air zoning of fuel burned furnaces of steam generation plant of a thermal power plant. Forced Draft (FD) fans are used for supplying the combustion air into the furnace of a boiler.

How do induced draft fans work?

An induced draught fan (ID fan) is provided to maintain a negative pressure in the furnace by sucking the products of combustion from it with a slight positive pressure at the discharge end vis-à-vis the bottom of the chimney/stack.

What is a PA fan?

Primary Air Fans: Primary air fans or PA fans are high-pressure fans, used in the boiler power plants to supply the air for transportation of coal directly from the pulverizer to the furnace. PA fans give positive pressure upstream of the coal pulverizer and handle relatively clean air.

What is the use of Draught in thermal power plant?

The draught is one of the most essential systems of the thermal power plant which support the required quantity of air for combustion and removes the burnt products from the system.

What is Seal air fan?

Seal air blowers eliminate leakage from pressurised air systems, typically in power generation plant coal mills. Dust can enter the mill roller and cause problems where blowers are not used. Seal air blowers are carefully constructed to prevent damage by corrosive gas while the fan is not operating.

What is FD fan?

A forced-draft (FD) fan is a type of pressurized fan that gives off positive pressure within a system. It is mainly used in industries that employ boiler systems in order to promote boiler efficiency, but it has a wide range of applications.

What is PA fan?

What is draft fan?

Fans that are used to pressurize a space or create mechanical air pressure in a system are referred to as forced draft fans. Forced draft is also used to identify the combustion process used in large boilers.

Which type of Draught fan is used in steam plant?

By generating a vacuum of negative air pressure, induced draught fans or ID fans are used in devices such as steam boilers and thermal oil heaters to suck out and expel flue gases from combustion chambers.

What is the use of a PA fan in a thermal power plant?

PA or Primary Air fans are most essential item in a thermal plant as it lifts and carry coal to destination. While coal is transported thru air from PAFan, it gets preheated so that moisture in the coal gets evoperated and coal does not remain sticky which is the basic requirement for air transportation of coal.

Why are SA fans used in coal based thermal plants?

The secondary fan allows for complete combustion of the fuel inside the furnace. As and when required the SA fan is used to increase the air flow to improve the efficiency and avoid wastage of fuel. Coal based thermal plants share of electricity generation is highest compared to other methods like hydroelectric, wind, gas or solar based plants.

Why are draught fans important in thermal power plants?

Draught fans play an important role in thermal power plants by providing critical support to the various process activities related to power generation. Coal-fired thermal power plants systems use several types of process fans.

What kind of fans are used in a pulverized boiler?

Axial fan-reaction type with blade pitch control is use in the Pulverized fired boiler (210/250/500 MW). Supply high pressure primary air through APH needed to dry & transport coal directly from the coal mills to the furnace. Primary air for mills is divided into cold & hot primary air.