Boiler combustion return device and boiler combustion system with the device

Abstract

The invention discloses a boiler combustion returning device and a boiler combustion system with the same. The boiler combustion returning device and the boiler combustion system with the same have the advantages that part of coal ash is returned to a boiler through the returning device and combined with coal, so that combustion speed is decreased, and the coal cannot be combusted instantly; since the coal ash derives from coal combustion, introduction of other dust impurities is not required; the coal ash from the boiler is extremely high in heat, and accordingly secondary heat use is achieved to a certain degree when the coal ash is returned, and coal combustion is saved; uneven contact between the large-particle coal ash and the coal is adverse to sufficient combustion of the coal, and accordingly a selecting mechanism is arranged to select relatively even coal ash, control the size of the coal ash and prevent large-particle coal ash from entering the boiler; a flow control mechanism is capable of adjusting a ratio of the coal to the coal ash, so that coal combustion speed is controlled.

Description

technical field [0001] The invention relates to the field of combustion equipment, more specifically, it relates to a boiler combustion return device and a boiler combustion system with the device. Background technique [0002] The boiler is an indispensable piece of equipment in many productions that require the use of steam. By burning fuel, steam will be evaporated for production. In the process of steam generation, the combustion status of the boiler has a great influence on the generation of steam and the utilization rate of fuel. There is a very significant impact. [0003] The Chinese patent with the publication number CN104315505A discloses a circulating fluidized bed boiler, which includes a furnace chamber, a feeding device, a combustion chamber, a cyclone separator, and a tail flue arranged in sequence from front to back, and the furnace is a fully suspended water-cooled wall. Wind caps are evenly arranged on the air distribution plate of the water-cooled wall, a...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a boiler combustion return device, which is to solve the problem of coal combustion speed when the boiler is burning

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