Chain grate rotary kiln hot air system suitable for active coke desulfurization and denitrification process

Abstract

The utility model discloses a chain grate rotary kiln hot air system suitable for an active coke desulfurization and denitrification process. The chain grate rotary kiln hot air system comprises a chain grate forced air drying section (UDD), an air draft drying section (DDD), a preheating section I (TPH), a preheating section II (PH), a circular cooler section I (C1) and a circular cooler section II (C2); a first hot air pipeline (P1) is arranged between the forced air drying section (UDD) and a circular cooler section III (C3); a second hot air pipeline (P2) is arranged between the induced draft drying section (DDD) and the second annular cooler section (C2); and the first hot air pipeline (P1) and the second hot air pipeline (P2) are connected through a hot air connecting pipeline (P12). The hot air of a circular cooler is used for drying pellets; harmful gas of HCl generated in a pellet drying process is prevented from entering the active coke desulfurization and denitrification system; and stable and smooth operation of the active coke desulfurization and denitrification system is guaranteed.

Description

technical field [0001] The application relates to the technical field of hot air system for pelletizing chain grate rotary kiln process, in particular to a chain grate rotary kiln hot air system suitable for active coke desulfurization and denitrification process. Background technique [0002] Pellet ore is a high-quality raw material for blast furnace ironmaking. Compared with sinter ore, the production of pellet ore has the characteristics of low energy consumption, good strength, high grade and excellent metallurgical properties. my country's pellet production is mainly based on the grate-rotary kiln process, and the pellet production of this process accounts for more than 60% of the total production of pellets. With the strengthening of national environmental protection and the implementation of new environmental protection policies, iron and steel enterprises have begun to implement ultra-low emission standards for exhaust gas, which requires that the concentration of s...

AI Technical Summary

Problems solved by technology

[0011] The existing technology mainly reforms the hot air system of the grate rotary kiln from the perspective of energy utilization and improving the drying effect or preheating effect of the grate, but it does not consider the generation of hydrogen chloride gas, and it will affect the subsequent desulfurization of activated coke. Design the content of the grate from the perspective of the large negative impact of the denitrification process

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