Biomass whirlwind hot blast stove

Abstract

The invention discloses a biomass whirlwind hot blast stove. A furnace is composed of a main combustion chamber and an auxiliary combustion chamber which are separated, wherein the main combustion chamber is used for a primary combustion and is provided with a cylinderical inner cavity; the auxiliary combustion chamber is used for a secondary combustion; the main combustion chamber and the auxiliary combustion chamber are communicated mutually at the upper part; and the side wall of the main combustion chamber is provided with a primary air hole which is communicated with an air pipe and is arranged tangentially. The primary whirlwind ensures the favorable mixing of smoke and primary air, prolongs the detention time of unburned carbon grannules in the furnace, and mainly plays a role of gasification; the auxiliary combustion chamber ensures the complete combustion of the unburned carbon granules and combustible gas in the furnace, plays a role of oxidation, and black smoke is generated by the uncomplete combustion caused by high temperature and oxygen deficit is reduced; the combustion efficiency of the hot blast stove is improved obviously, compared with the normal hot blast stove, the consumption amount of fuel is saved by about 10%, also the frequency of black smoke emission is decreased obviously, and the aim of clean combustion is achieved; and the hot blast stove can be suitable for the combustion of sawdust and meal, and is even suitable for the combustion of BMF (biomass fuel) fuel.

Description

technical field [0001] The invention belongs to the field of combustion equipment, and in particular relates to a hot blast stove that generates high-temperature biomass flue gas after burning biomass raw materials for use in other equipment. Background technique [0002] A technical key to the processing of biomass briquette fuel is to reduce the moisture content of its raw materials to 8% to 12%. The most widely used drying method is: using a biomass cyclone hot blast stove to directly heat biomass raw materials, such as bark, waste Wood, sawdust, straw, etc. Biomass generally has the characteristics of high moisture content, large fuel size change and high ash content. In addition, the uneven air distribution of the layer combustion furnace, the incomplete combustion of the fuel, and the reduction of the thermal efficiency of the hot blast furnace have caused serious pollution to the environment. Therefore, an effective way to improve the efficiency of hot blast stoves ...

AI Technical Summary

Problems solved by technology

The traditional hot blast stove adopts the natural ventilation at the bottom of the grate. The ventilation has no substantial effect on increasing the combustion rate, and the feeding port is flush with the grate surface. Adequate, low thermal efficiency, large amount of smoke and dust

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