A biomass semi-gasifier

Abstract

The invention discloses a biomass semi-gasification furnace which comprises a furnace. A combustion chamber is arranged on the upper portion of the furnace, and a gasification chamber is arranged on the lower portion of the furnace and is communicated with the combustion chamber by a flow guide pipe; a fan is communicated with a main air channel and an auxiliary air channel, the main air channel is communicated with main air holes of the gasification chamber, the main air holes are positioned at the bottom or on the lower portion of the gasification chamber, the auxiliary air channel is communicated with auxiliary air holes of the gasification chamber, the auxiliary air holes are positioned on the top or the upper portion of the gasification chamber, and the auxiliary air channel is further communicated with an air mixing hole positioned on a side wall of the flow guide pipe. The biomass semi-gasification furnace has the advantages that owing to the flow guide pipe arranged between the gasification chamber and the combustion chamber, the auxiliary air holes and the air mixing hole, airflow of the auxiliary air channel can be automatically distributed at different ratios in different flow directions at an ignition stage and a combustion stage, so that the semi-gasification furnace can be ignited quickly, most of generated combustible gas is gathered at the bottom of a kitchen utensil to be combusted in a centralized manner instead of being combusted in the gasification chamber in advance owing to deficiency of oxygen, heat is released in a centralized manner, and the kitchen utensil is high in absorption and utilization rate and good in energy conservation effect.

Description

technical field [0001] The invention relates to a domestic stove using solid fuels such as firewood and coal, in particular to a biomass semi-gasifier. Background technique [0002] In the known technology, the tar generated during the working process of the biomass gasification furnace is easy to accumulate and block the gas delivery pipe and the furnace head. The combustible gas sent from the chamber is directly burned. For example, the patent document whose publication number is CN101487597 discloses a biomass semi-gasification furnace, including a panel fire cover and an inner furnace, the upper part of the inner furnace is provided with a burner, and the area surrounded by the burner is a combustion chamber , the panel fire cover is set above the inner furnace and around the burner, the outer cover of the inner furnace is provided with a secondary air cover, and the inner shell of the inner furnace and the secondary air cover form a ring-shaped secondary air cover. Th...

AI Technical Summary

Problems solved by technology

However, there are still three deficiencies in this technical solution. The first is that it is difficult to start a fire, the combustion is slow, and the firepower is relatively small; Low, the outer flame cannot reach the bottom of the cooker, and the heat utilization rate is low; third, the flame produced by combustible gas combustion is wide and the firepower is dispersed, which is not conducive to the cooker to absorb heat

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