A two-stage combustion device and combustion method for biomass briquette fuel

Abstract

The invention discloses a two-section type combustion device and method for biomass briquettes. The combustion device comprises a feeding device and is characterized in that a heat exchange body is arranged on the lower side of the feeding device, a top combustion device and a bottom combustion device are arranged in the heat exchange body, a hearth is arranged between the bottom combustion device and the top combustion device, an ash device is arranged on the lower side of the bottom combustion device, an ignition device is arranged on the upper side of the top combustion device, a top air inflow device is arranged at the bottom of the top combustion device, a bottom air inflow device is arranged at the bottom of the heat exchange body, and a smoke exhaust device is arranged at the upper portion of the heat exchange body. According to the two-section type combustion device and method, continuous and stable feeding can be achieved, agglomeration is avoided, the excess air coefficient and pollutant discharge are low, and the automation degree is high.

Description

technical field [0001] The invention relates to the field of biomass briquette fuel combustion, in particular to a two-stage combustion device and combustion method for biomass briquette fuel. Background technique [0002] With the acceleration of urbanization and the continuous improvement of farmers' living standards, the consumption of rural commercial energy continues to expand, and the contradiction between supply and demand of rural commercial energy becomes increasingly acute. Biomass with "recyclability" and "environmental protection" will become the heating element for new rural buildings. one of the main energy sources. Biomass molding pellet fuel is mainly used for biomass power generation and cooking in China, and it is mainly used for power generation and building heating in foreign countries. For example, the heating field in Europe has grown at a rate of 20% in recent years. Most of the pellets are wood, and the purpose is to replace natural gas. . [0003] ...

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Problems solved by technology

[0004] Although the invention patent (application number 2014101512789) adopts two-stage combustion, the fixed carbon falls into the ash tray without combustion air, resulting in thickened carbon layer, high temperature, and slagging and agglomeration

After the ash is agglomerated, the most important thing is that it is not conducive to the distribution of air, resulting in poor combustion, high local air velocity, and increased fly ash content in the smoke

Generally speaking, it is to deteriorate combustion, reduce energy utilization, increase smoke and dust emissions, and seriously lead to shutdown

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