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Difference between revisions of "Preheaters"
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[[File:Preheater_1.jpg|thumb|200px|right|Preheater]] | [[File:Preheater_1.jpg|thumb|200px|right|Preheater Tower]] | ||
[[File:Preheater_2.jpg|thumb|200px|right|Preheater Diagram]] | [[File:Preheater_2.jpg|thumb|200px|right|Preheater Diagram]] | ||
'''Preheater''' is a general term to describe any device designed to preheat the combustion air used in a fuel-burning furnace for the purpose of increasing the thermal efficiency of the furnace. The combustion air preheaters are used for the large fuel-burning furnaces used to generate steam in thermal power plants. The air preheater increases the steam generator's thermal efficiency by preheating the combustion air with heat recovered from the hot combustion flue gases. | '''Preheater''' is a general term to describe any device designed to preheat the combustion air used in a fuel-burning furnace for the purpose of increasing the thermal efficiency of the furnace. The combustion air preheaters are used for the large fuel-burning furnaces used to generate steam in thermal power plants. The air preheater increases the steam generator's thermal efficiency by preheating the combustion air with heat recovered from the hot combustion flue gases. | ||
==Types== | ==Types== | ||
The two most often used categories of preheaters in thermal power plants are regenerative air preheaters and tubular air preheaters. | The two most often used categories of preheaters in thermal power plants are regenerative air preheaters and tubular air preheaters. | ||
===Regenerative air preheaters=== | ===Regenerative air preheaters=== | ||
Regenerative air preheaters are special types of heat exchangers designed to recover or reclaim heat in order to reuse or recycle it. | Regenerative air preheaters are special types of heat exchangers designed to recover or reclaim heat in order to reuse or recycle it. | ||
===Rotating-plate regenerative air preheater=== | ===Rotating-plate regenerative air preheater=== | ||
The rotating-plate air preheater (RAPH) consists of a central rotating-plate element installed within a casing that is divided into sectors. | The rotating-plate air preheater (RAPH) consists of a central rotating-plate element installed within a casing that is divided into sectors. | ||
==Industrial Applications== | ==Industrial Applications== | ||
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*Battery warmers and thermal pads | *Battery warmers and thermal pads | ||
==Avantages== | ==Avantages== | ||
Preheater process has got many advantages such as: Good preheat effect, suitable for any cement raw materials, not easy to be damaged and blocked up, materials fed into the kiln easily to be separated, and the system is well sealed up. | Preheater process has got many advantages such as: Good preheat effect, suitable for any cement raw materials, not easy to be damaged and blocked up, materials fed into the kiln easily to be separated, and the system is well sealed up. | ||
==Video== | ==Video== | ||
<youtube>fpj-nIVTaHs</youtube> | <youtube>fpj-nIVTaHs</youtube> | ||