What is the workflow of thermal power plant?

1, coal combustion in the boiler produces a lot of heat; Chemical energy → thermal energy

2, the water in the boiler, thus producing high temperature and high pressure steam; Steam passes through a steam turbine to convert heat energy into rotating power; After the heat energy of high-pressure steam is converted into mechanical energy, condensed water vapor is formed; Thermal energy → mechanical energy

3. The cooling water exchanges heat with the condensed steam, and the condensed steam continues to circulate, absorbing the combustion heat to generate high-pressure steam; The heat obtained by cooling water is used for central heating and urban heating; This is why the heating near the power plant is relatively strong. ) heat energy → central heating, heating.

4, high-pressure steam drives the rotor to rotate to generate electricity; Mechanical energy → electrical energy

Extended data and modern thermal power plant is a huge and complex factory, which produces electric energy and heat energy.

It consists of the following five systems: fuel system, combustion system, steam-water system, electrical system and control system.

In the above system, the most important equipment is boiler, steam turbine and generator, which are installed in the main building of the power plant. The main transformer and power distribution device are generally installed in independent buildings or outdoors. Other auxiliary equipment, such as water supply system, water supply equipment, water treatment equipment, dust removal equipment and fuel storage and transportation equipment. , installed in the main factory building, while others are installed in the auxiliary factory building or open space.

The basic production process of thermal power plant is that fuel burns in the boiler, releasing its heat and transferring it to the water in the boiler, thus generating high temperature and high pressure steam; Steam passes through the steam turbine, which converts heat energy into rotating power and drives the generator to output electric energy. By the 1980s, the efficiency of the best thermal power plants in the world reached 40%, that is, 40% of the thermal energy in the fuel was converted into electric energy.

References:

Baidu encyclopedia-thermal power plant