Sage-Tips

Which one is used in boiler to improve the efficiency?

Much like the return of condensate to the boiler, recovering the heat from the boiler blowdown can increase boiler efficiency. The blowdown valve is used to remove boiler water which contains soluble and insoluble solids. It helps reduce the level of dissolved solids in the boiler water to prevent the boiler scale.

What is necessary for complete combustion of fuels?

Complete combustion needs a plentiful supply of air so that the elements in the fuel react fully with oxygen. Fuels such as natural gas and petrol contain hydrocarbons. These are compounds of hydrogen and carbon only.

What is the source of fuel of the boiler in process energy?

The boiler takes in energy from some form of fuel such as coal, natural gas, or nuclear fuel to heat water into steam.

What is the process of burning a fuel to release energy?

Combustion is the burning of a substance. The release of energy from fuels is used to make other forms of energy. When gasoline burns in a car engine, some of the chemical energy in the gasoline is converted into heat. The heat is converted into mechanical energy.

What is necessary for complete combustion of fuel Mcq?

What is necessary for complete combustion of fuels? Explanation: For complete combustion of fuels, it is necessary to supply sufficient amount of air. If air supplied is not sufficient then combustion will be incomplete.

What is types of fuel used in boiler?

The primary boiler fuels are coal, oil, and gas. Oil and gas involve the simplest controls, since they can be measured easily and flow is regulated by a control valve in the fuel line.

How do fuel generate energy?

Energy gained from burning fossil fuels is converted to electricity and heat in commercial power plants. During this reaction heat is released which further amplifies the reaction. Electricity is generated by transforming mechanical energy (heat) to electrical energy in a turbine or generator.

What is the reaction involved when burning fuel?

Combustion is a high-temperature exothermic (heat releasing) redox (oxygen adding) chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

How do you test the efficiency of a boiler?

Basically Boiler efficiency can be tested by the following methods: 1) The Direct Method:Where the energy gain of the working fluid (water and steam) is compared with the energy content of the boiler fuel. 2) The Indirect Method:Where the efficiency is the difference between the losses and the energy input.

What grade of fuel oil is used in a boiler?

Heavy residual oils are so viscous that they are solid at room temperature and must be kept in heated storage tanks. The distillate grades typically used in boilers include No. 2 fuel oil and No. 4 fuel oil. The residual grades used for heating system boilers include both No. 5 and No. 6 fuel oil.

Can a heating system burn any fuel?

In general, a heating system can burn any of these fuels, regardless of whether it produces hot water or steam. Heating systems designed for each fuel type will have different fuel supply systems and burners, but the other components of the system will be the same (heat exchanger and heating supply loop— see chapter 2).

How many safety valves does a high pressure boiler have?

Every high pressure or low pressure boiler must have at least one safety valve. A high pressure boiler of more than 500 square feet of water heating surface must have safe discharge point. Each boiler must have a bottom blowoff pipe fitted with a valve or cock in direct connection with the lowest water space practicable.