page_title: Corner tube boiler
section_title: Working
hierarchical_section_title: Corner tube boiler / Working
caption_attribution_description: English: Water circulation concept in corner tube boiler
context_page_description: A cornertube boiler is a type of natural circulation water-tube boiler which differentiates itself from other water tube boilers by its characteristic water-steam cycle and a pre-separation of heated steam from the steam-water mixture occurs outside the drum and the unheated downcomers.
context_section_description: The water flows down from the drum (6) through the down comers (7) and it is distributed in the different riser tubes(4). The steam-water mixture circulates and flows in the upward direction through the riser tubes. In the radiation heated area through the pre-separator (also known as cross-collector) (3),occurs the pre-separation of steam from the steam water mixture. The separated steam flows through the overhead pipe (5) and the steam-water mixture flows through the collector pipe (3) to the drum (6) as well. In the drum occurs the final separation of steam from steam water mixture. The rest amount of water flows through the unheated return tubes (1) and downcomers (7) to the rear wall distributor/header (2). Due to the water returning from the unheated downcomers (1) a lively circulation takes place .
caption: Schematic working of water circulation in corner tube boiler
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