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Economizer in a boiler

 Economizer

Definition of Economizer 

Economizer is a mechanical device which increases the efficiency of boiler. Economizers are heat exchangers that move the hotness in the pipe gas to another medium‚ by and large the heater feed-water‚ albeit different streams are once in a while utilized, for example, make-up water. There are 2 sorts of economizers: non-consolidating and gathering.



Function of Economizer

 
1. It is used in thermal and nuclear power plant.
 2. It is increasing the temperature.
3. For it increases the efficiency of boiler.

working


With the help of economizer the temperature of boiler water is increased.  Water boils at a certain temperature in the boiler and turns into steam.  The turbine is rotated using the force of that steam.  Then electricity is produced by coupling the generator with the turbine.  The steam now produced is cooled by a cooling tower and turned into water again.  And that water again comes to the economizer with the help of centrifugal pipes.  In the economizer the liquid is hit with the help of fuel barn then this hit liquid goes to the boiler.  Here the amount of fuel in the boiler goes less to get the hit liquid boiler and the total efficiency is increased by approximately 8%.  In this way the economizer pre-hits the liquid and sends it to the boiler.



Type of economizer

there are two type one is pressurized economizer and non pressurized economizer

non condensing economizer

The most widely recognized are non-gathering economizers. They are heat exchanger coils‚ typically finned‚ that are situated in the pipe gas ducting at the exit of the heater. Typically‚ a non-consolidating economizer will raise the general productivity by 2% to 4%. They are planned and work to keep up with the pipe gas temperature over the pipe gas gathering temperature to forestall consumption of the vent gas ducting. This is especially significant for powers containing sulphur‚ as sulfurous mixtures will frame in the vent gas that will both raise the general pipe gas dewpoint and when buildup happens will prompt the arrangement of sulphuric acid‚ which is exceptionally destructive.

condensing economizer


Gathering economizers are intended to oblige the destructive liquids produced when consolidating the dampness out of the pipe gas. There are 2 kinds of gathering economizers: heat exchanger and direct contact (splash). They catch considerably more hotness and accordingly can raise the general evaporator proficiency by 10% to 15%. For consolidating economizers to be the most effective‚ low temperature heat sinks are needed to bring the pipe gas temperature well underneath the vent gas gathering temperature.
Economiser


advantage of economizer


1. The use of economizer results in less amount of fuel in the boiler.
2. Efficiency is increase approximately 8%


Disadvantage


Sending fuel barn over the economizer causes a layer of carbon to fall on the economizer so that the economizer cannot capture heat very well.

Application of Economizer 

 
It is used in thermal and nuclear power plant















































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