It is critical that improve boiler efficiency for factory which is using a boiler.As we all know, improving the boiler efficiency even slightly can cut down the fuel bills significantly. But how to increase boiler efficiency? maximize boiler? there are many ways to maximize your boiler system's efficiency.
If you presently have an old, inefficient oil burner (such as rotary up or atmospheric), or an oversized burner (causing excessive short cycling), it may be cost-effective to replace the burner with a modern, efficient and properly sized burner. You may want to consider variable firing rates and/or dual fuel capabilities allowing you to choose the least expensive heating fuel at any given time.Though replace burners,Up to 5 percentage points can be realize.
Quality of fuel is of prime importance as far as boiler efficiency is concerned. Just as an example, if fuel has high moisture content, the enthalpy losses taking place will be much higher and as a result, the boiler efficiency will come down. In case of solid fuel fired boilers, drying the fuel before combustion can avoid enthalpy losses and hence improve the boiler efficiency.
factory provided with more that one boiler or steam generators must ensure that the load of the boiler is neither too low nor too high. The best operating range to get the maximum boiler efficiency is 2/3rd of the boiler full load. If the boiler is operated below 50% load, more air is required to burn the fuel which increases the sensible heat loss. It is always better to run less number of boiler at high load than more number at low load.
Economizer and air pre-heater are heat transfer surfaces in which air temperature and water temperature are raised by transferring heat from other media such as flue gas. Hot air is necessary for rapid combustion in the furnace. So an essential boiler accessory which serves this purpose is air pre-heater. The air pre-heater is not essential for operation of steam generator, but they are used where a study of cost indicates that money can be saved or efficient combustion can be obtained by their use. The efficiency of the boiler increases with the increase in the temperature of the combustion air used in the furnace. This is achieved by the increased temperature of the flue gas in the air preheater and economizer zone.