Horizontal double-layer grate back firing boiler

Abstract

The horizontal double-layer fire grate reverberatory boiler includes boiler barrel, water cooled pipe, combustor, etc. and the inside of the boiler has three parts of combustor, high temperature fume chamber and heat exchanging cavity. The combustor in the front part of the boiler generates high temperature fume entering to the high temperature fume chamber, and the water pipe fire grate and the boiler barrel constitute one heat exchanging loop. The heat exchanging cavity has boiler barrel in the upper part and shell-and-tube heat exchanger in the lower part with connecting convection pipes, water cooled pipes and lowering pipes in between. Owing to the independent combustor and high temperature fume chamber, reverse heat exchange mode and other technology, the present invention has raised coal burning out rate, lowered fume exhaust temperature, lowered dust and smoke content, and raised heat efficiency and environment protecting effect.

Description

technical field [0001] The invention belongs to a horizontal boiler, in particular to a horizontal double-layer backfired boiler. Background technique [0002] Horizontal hand-fired boilers are commonly used boilers manufactured and sold by boiler factories. The structure of this boiler includes: drum, water-cooled wall tube, downcomer, rear shed tube, header and furnace wall, etc. There is a smoke pipe in the drum, and a row of water-cooled wall tubes in the shape of human ribs are arranged on both sides of the outer wall of the drum. The chamber between the two water-cooled wall tubes is the furnace. The bottom is sent in by the blower. When working, the coal is burned on the grate (normally burning), and the heat released is transferred to the heating surface of the boiler, so that the temperature of the boiler water is raised to generate steam to achieve the purpose. It is not difficult to see that the boiler with this structure has the following characteristics: the h...

AI Technical Summary

Problems solved by technology

Therefore, the high-temperature flue gas flows from a place with a lower water temperature (the water temperature in the water wall tube is lower) to a place with a higher water temperature (the water temperature in the drum is higher), and heat exchange is performed through radiation and convection in the furnace, so the boiler's The exhaust gas temperature is bound to be higher than the temperature of the saturated steam in the drum, and the higher the exhaust gas temperature, the more heat the flue gas takes away, resulting in heat loss, and the thick black smoke is also rich in dust particles, polluting the environment

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