Air heating furnace

Abstract

The invention provides an air heating furnace which is composed of a fire-resistant component, a heat exchange tube, a heat exchange chamber, an induced draft fan, an ash chamber, a feeding opening, acombustion chamber, an observation door, an ash removing door, an air volume adjusting valve, air tubes, an oxygen-assisted air blower, a cold air blower and the like. Fuel enters the combustion chamber though the feeding opening, and oxygen-assisted air of the air blower enters of the combustion chamber and the ash chamber through the upper air tube and the lower air tube to conduct oxygen-addition combustion assisting, so that the fuel is combusted sufficiently. High-temperature hot air generated through combustion enters the heat exchange tube and is subjected to heat exchange with normal-temperature air in the combustion chamber, and finally, the hot air and exhaust gas are discharged. The black smoke smoking phenomenon is eradicated, the resource is saved, and environmental pollutionis reduced; and the fire-resistant component in the combustion chamber is in an arch shape, direct radiation of a high-temperature heat source is resisted, the traveling route of the hot air is changed, the hot air evenly passes through the heat exchange tube, and the difficult problems of oxidization and fusion are solved.

Description

technical field [0001] The present invention relates to heating equipment, in particular to a hot blast stove. Background technique [0002] Existing hot blast stoves are mostly built with bricks, fixed, and bulky, with high investment costs and a waste of money. They are disposable equipment and cannot be moved, which limits production. [0003] Due to the reduced volume of the steel structure hot blast stove, the combustion chamber and the heat exchange system are designed as an integrated structure. The fuel (medium, biomass) is burned in the combustion chamber, and the temperature of the combustion chamber is as high as 1500 ° C. The heat pipe, due to the induced draft fan, causes the high-temperature medium to pass through part of the heat exchange tubes, resulting in oxidation and melting of the heat exchange plate and heat exchange tube of the hot blast stove, shortening the service life of the heat exchange plate and heat exchange tube, and increasing Maintenance co...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing hot blast stoves are built with bricks, fixed, and bulky, with high investment costs and a waste of money. They are disposable equipment and cannot be moved, which limits production.

[0003] Due to the reduced volume of the steel structure hot blast stove, the combustion chamber and the heat exchange system are designed as an integrated structure. The fuel (medium, biomass) is burned in the combustion chamber, and the temperature of the combustion chamber is as high as 1500 ° C. The heat pipe, due to the induced draft fan, causes the high-temperature medium to pass through part of the heat exchange tubes, resulting in oxidation and melting of the heat exchange plate and heat exchange tube of the hot blast stove, shortening the service life of the heat exchange plate and heat exchange tube, and increasing Maintenance and usage costs affect production

[0004] The feeding method of the existing combustion chamber is to directly add fuel into the combustion chamber. In a short period of time, the fuel will produce dense smoke and dust under the condition of oxygen deficiency, which will pollute the environment.

[0005] In the past, the method of adding oxygen to the combustion chamber was to add oxygen under the combustion chamber (some designs added a secondary oxygen supply air pipe in the combustion chamber, and in the high temperature environment above 1500°C in the combustion chamber, the oxygen addition air pipe would quickly melt and lose the oxygenation effect) , when fuel (coal, biomass) is added in the combustion chamber, the fuel (coal, biomass) is seriously insufficient in oxygen during the combustion process, and the fuel (coal, biomass) cannot be fully combusted, producing black smoke and CO and other harmful substances , the heat utilization rate of fuel (coal, biomass) combustion is reduced, wasting resources and seriously polluting the environment

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