What are the factors which affect the boiler performance?

There are several factors that influence the energy performance of boilers including fuel characteristics, firing method, steam pressure, and heating capacity. The main challenge to ensure optimal operating conditions for boilers is to provide the proper excess air for the fuel combustion.

Is it possible to get benefit from the heat of the flue gases leaving power plant?

There are numerous opportunities and options for improving the efficiency of existing power plants. Boiler efficiency improvement achieved by using heat recovered from the flue gas for drying of high-moisture and washed coals will be discussed in Part II.

What causes high flue temperature?

The boiler water is being pushed through the fairly small coil at a flow rate high enough to accommodate the boiler flow rates and the tank loss. The tank can’t absorb all of the BTUs the boiler is pushing out. The remaining BTUs exit through the flue, causing the rise in temperature.

Which of the following are the causes for rise in exit flue gas temperature in a boiler?

If the tubes are coking internally, fouled or developing scale build-up or missing fins, then the flue gas temperature will be higher than designed. A leak in one of the tubes will cause extremely high temperatures due to the oxidation of the fluid.

What can flue gas be used for?

9.4 Flue gas Combustion is used primarily for heat by changing the potential chemical energy of the fuel to thermal energy. This occurs in a fossil fuel-fired power plant, a home furnace, or an automobile engine. Combustion is also used as a means of destruction for our unwanted materials.

What is the effect of mill outlet temperature on boiler performance?

The mill outlet temperature has a major impact on the boiler performance levels. The mill outlet temperature directly impacts the dry gas loss in boiler which is a major loss. This depends on the moisture level in coal, the higher the moisture level the quantity of hot air required in mill for the same mill load is higher.

What is the effect of coal fineness on boiler performance?

This is mainly done to avoid mill fire and mill explosion. While all these are regarding the mill performance, the coal fineness and mill out let temperature also affect the boiler performance. The coal fineness has an effect on the combustion performance like the bottom ash percentage combustibles when the plus 50 mesh percentage goes up.

What is the mill outlet temperature of coal-air mixture?

The mill outlet temperature of coal-air mixture is maintained between 65 to 90 degree centigrade in the case of low and medium volatile coal. In the case of high volatile coal, while the lower limit generally remains as 65 degree centigrade, the upper limit is restricted to a lower level depending on…

Does biomass co-firing affect furnace exit gas temperature and gaseous emissions?

The effect of biomass co-firing on the furnace exit gas temperature and the gaseous emissions of CO 2, NO x and SO x is examined for a biomass co-firing based pulverized coal power generation system. We consider four biomass fuels (rice husk, sawdust, chicken litter and refused derived fuel) and two coals (bituminous coal and lignite).