Energy-saving and environment-friendly coal-fired cooking heating stove, cooking heating method and application

Abstract

The invention provides an energy-saving and environment-friendly coal-fired cooking heating stove, a cooking heating method and application. The coal-fired cooking heating stove is characterized in that a volatile component return pipeline is longitudinally arranged in a pyrolysis gasification zone, the top of the volatile component return pipeline is higher than a coal adding opening, and the bottom of the volatile component return pipeline extends into a semi-coke combustion area; a heating flue and a cooking flue are combined into a heating and cooking flue, and a cooking-heating switching rod and a movable cover plate are used to regulate the operation state of the coal-fired cooking heating stove. The coal-fired cooking heating stove has the advantages that on the basis of the staged combustion theory, the volatile component return pipeline is arranged in the pyrolysis gasification zone, and accordingly smoke reversing when the coal adding opening is opened can be avoided; in addition, the heating flue and the cooking flue are combined into one flue, the flue is provided with tertiary air orifice to form a secondary complete combustion area, flue gas complete combustion degree is enhanced greatly, and stable smoke-free combustion under full work conditions (coal adding, slagging, cooking, heating, stove sealing and the like) is achieved.

Description

technical field [0001] The invention belongs to the field of coal-fired combustion equipment, and relates to a coal-fired cooking and heating furnace, a cooking and heating method and its use, and in particular to an energy-saving and environment-friendly coal-fired cooking and heating furnace, a cooking and heating method and its use based on the hierarchical combustion theory. Background technique [0002] At present, households in some areas in northern my country, especially townships and rural households, generally use earth heating for heating. Due to the unscientific design of stoves, some coal cannot be completely burned and is discharged with smoke. The utilization rate is low. Not only the coal consumption is large, And it will cause serious air pollution. Moreover, in real life, while the majority of rural users are heating, they also hope that the stove can be used for cooking at the same time, such as boiling water, cooking and cooking. [0003] At present, ther...

AI Technical Summary

Problems solved by technology

[0009] Most of the existing cooking and heating furnaces based on the staged combustion theory adopt the design of two flues, that is, the heating flue and the cooking flue, which increases the volume of the furnace body, increases the manufacturing cost, and occupies a large area; at the same time, due to the briquette The shape is regular, the void ratio is large, and the volatile matter produced by dry distillation and pyrolysis is diffused to the top of the coal seam. When the coal filling port is opened, especially when the heating and cooking are switched, the volatile matter / smoke will flow back into the house due to the short-term loss of draft in the furnace. Phenomenon;

[0010] However, existing cooking and heating furnaces based on the staged combustion theory mainly rely on the smoke elimination in the semi-coke combustion area, and the secondary air assists in smoke elimination and combustion, resulting in a large primary air volume, resulting in a strong oxidizing atmosphere in the semi-coke area. Although it is beneficial to combustion, It is not conducive to reducing the generation and emission of nitrogen oxides; at the same time, the high oxygen content in the flue gas (sometimes as high as 16-18%) not only promotes the formation of nitrogen oxides, but also reduces or offsets the preparation effect of staged combustion on nitrogen oxides. At the same time, the heat loss of the flue gas is large, which reduces the heat utilization efficiency; in addition, when the coal seam is burned through, or the semi-coke combustion area becomes smaller (such as due to slag discharge), the combustion time of volatiles is reduced, which not only causes unstable combustion of the stove It also reduces the smoke elimination effect and causes smoke to appear in the smoke exhaust

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