Energy-saving and environmental-friendly layer-burning boiler suitable for solid fuel and processing method of layer-burning boiler

Abstract

The invention provides an energy-saving and environmental-friendly layer-burning boiler suitable for solid fuel and a processing method of the layer-burning boiler. A boiler body of the layer-burningboiler is internally provided with a first cavity and a second cavity with the bottoms communicating with each other, a pre-burning air opening is formed in the middle boiler wall of the first cavityand / or a pre-burning air pipe is arranged in the middle of the first cavity, the areas / the area, on the upper part of the pre-burning air opening and / or on the upper part of the pre-burning air pipe,inside the first cavity are / is destructive distillation pyrolysis areas / a destructive distillation pyrolysis area, the areas / the area, on the lower part of the pre-burning air opening and / or on the lower part of the pre-burning air pipe, inside the first cavity are / is semi-coke reduction pre-burning areas / a semi-coke reduction pre-burning area, a first chain grate is arranged on the lower partsof the first cavity and the second cavity, a steam drum is arranged at the top of the second cavity, a rear arch is arranged below the steam drum, and at least two air chambers are arranged below thefirst chain grate. According to the energy-saving and environmental-friendly layer-burning boiler suitable for the solid fuel and the processing method of the layer-burning boiler, nitrogen oxides generated by burning are converted into harmless nitrogen through a reaction with reducing pyrolysis gas and semi-coke in a low-nitrogen pre-burning mode, and through methods such as combining pyrolysisdesulfurization and burning desulfurization and pyrolysis products of coal to form reburning denitration, emission of multi-pollutants such as SOx, NOx, and CO is effectively reduced.

Description

technical field [0001] The invention belongs to the field of coal combustion equipment, and relates to a layer-fired boiler and a processing method thereof, in particular to an energy-saving and environment-friendly layer-fired boiler suitable for solid fuel and a processing method thereof. Background technique [0002] Coal-fired bed-fired boilers are one of the main coal utilization methods in my country and are widely used in heating and industrial production processes. The traditional chain grate furnace in my country adopts single-side ignition during operation. During operation, the coal burns on the grate as it moves along with the grate, and the combustion of the fuel layer along the length of the grate has obvious partitions. [0003] CN 103697459A discloses a horizontal coal-fired full-automatic hot water boiler to solve the problems of low thermal efficiency of existing coal-fired boilers and insufficient coal in the combustion process, resulting in environmental ...

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Problems solved by technology

Although the chain grate can control NO x However, because the pre-combustion chamber is set in the stove, the coal is partially pre-combusted, which will cause high combustion intensity, which is not conducive to combustion control and optimization of the thermal environment; at the same time, in the front air chamber The introduction of steam is not conducive to the control and adjustment of gasification, thereby reducing the burnout rate of coal combustion

[0005] In addition, in the existing small and medium-sized coal-fired decoupling combustion devices that have been developed, although the control of NO x Some effects have been achieved in terms of emissions, but limited by the structure, the boiler load is small and the fuel burnout rate is low, especially for the existing clean fuel briquettes that have a long burnout time, the boiler load and fuel burnout have not yet been solved. The contradiction between rate and coking

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