Combustion efficiency is a measure of how effectively the heat content of a fuel is transferred into usable heat. The stack temperature and flue gas oxygen (or carbon dioxide) concentrations are primary indicators of combustion efficiency.
General and preventative boiler maintenance is the number one way to avoid costly outages and expensive equipment repairs. At ZOZEN, our maintenance services cover everything from cleaning to scheduled repairs. We provide maintenance for all boiler types including gas, coal and biomass. A yearly maintenance program ensures optimum boiler efficiency and savings.
It is the ratio of quantity of steam generation in kg/hr to quantity of fuel consumed in kg/hr. Evaporation ratio = quantity of steam generation/quantity of fuel consumed.For example quantity of steam Is 310 ton/hr and fuel is 55 ton/hr then the evaporation ratio is 5.63. Evaporation ratio is also known as steam fuel ratio.A drop in evaporation ratio indicates drop in boiler efficiency.Boiler evaporation ratio depends on fuel quality. Higher calorific value of fuel having higher evaporation ratio. Value of evaporation ratio for different types of boiler is listed as- a) Coal fired boiler- 4.0-6.0. b) Oil fired boiler- 13.0-14.5 . c) Gas fired boiler- 11.0-13.
It is the ratio of heat output to heat input of the boiler. Boiler efficiency= Heat output / heat input *100. =steam flow (enthalpy of steam -enthalpy of feed water) / coal flow * gcv. For example if there is a 80mw boiler with 540 dig centigrade of main steam temperature, feed water temperature of 300 dig centigrade , coal flow 56 ton, gcv 4000 kcal/kg then the boiler efficiency will be =307(826.28-242.58)/56*4000=80%.
When a steam boiler is continuously operated for a long period of time, the amount of steam generated per hour is called the evaporation amount of this boiler, and is usually used in tons per hour (t/h or tph). A steam boiler is a steam device that uses heated energy or other thermal energy that is converted by the combustion of a fuel to heat the feed water to obtain specified parameters (temperature, pressure) and quality. 1tph means that the boiler can produce 1 ton of steam per hour under standard operating conditions.
Shell boilers may be defined as those boilers in which the heat transfer surfaces are all contained within a steel shell. Shell boilers may also be referred to as ‘fire tube’ or ‘smoke tube’ boilers because the products of combustion pass through the boiler tubes, which in turn transfer heat to the surrounding boiler water.
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info@zozen.com
0086-510-68530299
