Double-door double-control secondary air entering complete combustion technology

Abstract

The thinking of the invention aims at making combustion complete as far as possible and reducing harmful heat dissipation loss as far as possible. A T-shaped hearth structure leads fuels in a first combustion chamber to incompletely burn at an anaerobic condition and take on dark red flames, and leads combustible gas to be fully and completely burned again at a second combustion chamber and take on pure white flames, thereby leading the assumption of the complete combustion to be realized; a method of preheating secondary air is used for minimizing the heat dissipation of a furnace shell, reducing the excess air entering the hearth and maximizing the heat dissipation of a chimney, thereby minimizing the harmful heat dissipation loss. Compared with a common cooking range, the hearth structure saves fuels by two thirds in the real using process and saves cooking time by one third and is one of the most ideal household solid fuel combustion equipment.

Description

technical field [0001] The invention relates to a household solid fuel stove and a stove, in particular to a stove and a stove with secondary air intake. Background technique [0002] The biggest feature of the secondary air inlet furnace in the prior art is that the cross-sectional diameter of the secondary combustion chamber formed after the secondary air intake is either consistent with that of the furnace or smaller than that of the furnace. The volume of the combustion chamber is small. Such a design is used on a coal-fired furnace. Since the secondary air outlet is too close to the bottom of the pot, the combustible gas rising from the furnace will inevitably hit the bottom of the cold pot before it comes into contact with the secondary air, and the temperature will not reach the ignition point and will not It will burn again, so the effect of secondary air intake for combustion is greatly reduced; this design is used on biomass fuel stoves such as firewood and straw,...

AI Technical Summary

Problems solved by technology

Such a design is used on a coal-fired furnace. Since the secondary air outlet is too close to the bottom of the pot, the combustible gas rising from the furnace will inevitably hit the bottom of the cold pot before it comes into contact with the secondary air, and the temperature will not reach the ignition point and will not It will burn again, so the effect of secondary air intake for combustion is greatly reduced; this design is used on biomass fuel stoves such as firewood and straw, if the diameter of the furnace is small (such as using a coal stove to burn wood) , when the fire is empty (that is, no pot is placed on the stove), the flame is very high, but once the pot is placed on it, there will be a lot of black smoke, because the volume of the second combustion chamber is too small to allow the combustible gas to fully enter. The result of burning can only be continued above the stove without a pot; at this time, in order to make the second combustion chamber have a larger volume space, the diameter of the furnace (that is, the furnace) must be increased, and once the furnace is larger ( That is, the diameter of the furnace is larger), then the fuel consumption of the furnace will increase accordingly, which will not achieve the purpose of saving firewood

Some secondary air pipes (or cavities) are directly installed outside the furnace without any insulation protection. Although the secondary air can obtain a higher temperature, it also seriously reduces the furnace (or the first combustion chamber). The temperature in the chamber) seriously affects the combustion and gasification effect of the fuel in the furnace (or the first combustion chamber). After all, the first combustion chamber is the main combustion chamber, and the second combustion chamber is only an auxiliary combustion chamber to reduce the first The secondary air design at the expense of the temperature of the combustion chamber seems to be putting the cart before the horse

In addition, the design of the secondary air intake is controlled by the same furnace door as the primary air intake, which can only be regarded as the secondary use of the primary air intake, not the real secondary air intake.

In addition, too much secondary air will cause more air than is required for combustion to enter the furnace. These excess air will not participate in combustion. They will only take away a large amount of heat energy through the chimney after being heated in the furnace, causing undesirable Necessary heat loss, the existing secondary air inlet furnace does not take into account the factor of excess air

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