Double-blowing two-seat two-row vertical pellet-roasting furnace

Abstract

The double-blowing two-seat two-row vertical pellet-roasting furnace includes stoving bed, blast guiding chamber, dust laying chamber, blast guiding pipe, combustor, roasting chamber, roasting blast distributing chamber, material laying unit, material distributing unit and pre-drying unit. It features the complex furnace form with burners on two sides of the roasting band, cooling jets on two sides of the cooling band, air exhaust ports on two sides of the end of the cooling band, dust laying chamber below the blast guiding chamber and the pellet pre-drying unit over the stoving bed. The present invention has improved heating, cooling and ventilating mechanisms of vertical furnace, and has the advantages of reinforced roasting, reinforced cooling, reinforced drying, controllable airflow motion, etc.

Description

Technical field [0001] The invention belongs to the technical field of pelletizing shaft furnaces, and in particular relates to a double-seat, double-blowing, and double-row pelletizing shaft furnace for roasting iron-containing pellets. Background technique [0002] Due to the unreasonable structure of the existing pellet shaft furnace, the single furnace output of the pellet shaft furnace is low. The main problems that exist are: [0003] Limited by the structure, the area of ​​the drying bed is insufficient, and it is difficult to match the pellet processing capacity; [0004] The heat supply system is unreasonable, mainly reflected in the fact that the roasting air is supplied from one side, and it is difficult to blow through the entire roasting zone. At this time, the water equivalent ratio (ie heat flow ratio) is stronger at the bottom and weak at the top; [0005] The cooling system is unreasonable, mainly reflected in the fact that the cooling air is not easy to b...

AI Technical Summary

Problems solved by technology

[0005] The cooling system is unreasonable, mainly reflected in the fact that the cooling air is not easy to blow through the entire cooling section;

[0006] A large amount of dust forms a vicious cycle in the shaft furnace and accumulates in the furnace, affecting the air permeability of the material layer, which not only deteriorates the heat exchange in the shaft furnace, but also increases the resistance of the air flow through the material layer, seriously increasing the fan load , and even make it difficult for cooling wind and roasting wind to blow in;

[0007] The air guide wall is supported by water beams, which makes the life of the air guide wall extremely short and the maintenance cost is high;

[0008] The operation of the shaft furnace is uncontrollable, especially the movement of the air flow

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