Thermal gas flow circulating type winnowed coal humidifying process for indirectly utilizing waste gas of coke oven flue

Abstract

The invention discloses a thermal gas flow circulating type winnowed coal humidifying process for indirectly utilizing waste gas of a coke oven flue. The process is mainly carried out in a full-boiling windowing drying fluidized bed and a hot waste gas waste heat utilizing system, wherein the hot waste gas waste heat utilizing system comprises a hot gas closed circulating system and a waste heat recycling system. Firstly, the waste heat recycling system utilizes high-temperature hot water converted by utilizing the waste heat of the coke oven flue gas, and supplies heat to the hot gas closed circulating system, wherein a heat-absorbed high-temperature gas medium is conveyed to a segmented air chamber of a fluidized bed; meanwhile, particle materials enter an accommodating cavity of the fluidized bed through a charging end, the high-temperature gas medium penetrates through an air distributing plate to carry out windowing, classifying and drying onto the particle materials, enters a hot gas recycling pipeline of the hot gas closed circulating system through a waste gas collecting and processing system of the fluidized bed, and reflows to a water-gas hot tube heat exchanger, and that cycle repeats. The invention disclosed by the invention is reasonable in flow, sufficient in resource utilization, energy-saving, environment-friendly, and obvious in comprehensive benefits.

Description

technical field [0001] The invention relates to a coking coal preparation process in a coking plant, in particular to a wind separation coal humidity control process method utilizing coke oven flue gas waste heat. Background technique [0002] The coking coal preparation process of traditional coking plants is mainly to mix several kinds of coking clean coals with pulverization and then install them in the furnace, which does not include the winnowing and drying step. Since the flue gas of the coke oven is naturally ventilated by the chimney, the waste heat of the flue gas at a temperature above 200°C generated by the coke oven has not been effectively utilized, and it is easy to cause pollution to the atmospheric environment. In addition, due to the combination of several coking and washed coals for crushing, the particles ≤ 3mm are over-crushed, while the particles > 3mm are not crushed in place. It is difficult to achieve and exceed 80% of the coal materials with a par...

AI Technical Summary

Problems solved by technology

The direct use method requires the erection of a large-diameter extraction pipeline from the coke oven flue to the coal humidity control equipment for long-distance transportation, so the site conditions must be met. coking plant), the reconstruction of the coal humidity control technical renovation project in the direct utilization mode does not meet the actual needs

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