"Coal" PPT courseware

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"Coal" PPT courseware

Coal is known as black gold. It is a very common and important fuel in modern production and life. Where have you seen coal?

Part of the electricity we use comes from thermal power generation, and coal is the fuel for thermal power generation.

Lignite is mostly lumpy, dark brown, dark in luster, and loose in texture. It has a low ignition point and is easy to catch fire. It burns quickly, has a large flame, and emits black smoke. It has a short burning time and requires frequent addition of coal.

Bituminous coal is generally granular, small pieces, and also powdery, mostly black and shiny, with fine texture, not too high ignition point, and easier to ignite; it burns quickly, has a long flame, a large amount of black smoke, and takes a long time to burn. Long; most bituminous coals are sticky.

Anthracite is available in powder form and small lumps. It is black and shiny with a metallic luster. It has a high ignition point and is not easy to catch fire; it is slow to ignite when it first burns, and then becomes larger and stronger, with strong firepower, short flame, less smoke, and long burning time.

we discover:

Lignite is the easiest to ignite, bituminous coal is easy to ignite, and anthracite is more difficult to ignite.

Anthracite has the longest burning time, followed by bituminous coal, and lignite has the shortest burning time.

How does coal generate electricity?

Coal can be burned, so how is the heat generated during combustion used to generate electricity?

The process of thermal power generation

Coal combustion generates heat, and the heat turns water into steam. The steam drives the turbine generator to rotate, thereby generating electricity.

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Update Time: 2024-09-30

This template belongs to science courseware E-education edition fifth grade science volume 2 industry PPT template

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