Process system for waste heat utilization in coking coal preparation process

Abstract

The invention discloses a process system for utilizing waste heat in the coking coal preparation process, which includes a full-boiling air-selection drying fluidized bed and a hot waste gas waste heat utilization system; the full-boiling air-selection drying fluidized bed includes an outer shell and an air distribution plate, The air distribution plate is composed of the air distribution bottom plate in the middle and the air distribution side plates on both sides. The air distribution bottom plate and the air distribution side plates are respectively provided with ventilation bottom holes and ventilation side holes. The air distribution bottom plate is composed of multi-section air distribution panels. It is formed by connecting front and back; the front air distribution group plate is concave-convex, and the air nozzle is provided on the bottom hole of the air distribution group; Exhaust gas waste heat utilization system includes water-air heat pipe heat exchanger, hot gas inlet pipe, hot gas blower and hot gas recovery pipe. The hot gas inlet pipe is connected to the segmented air chamber, and the inlet end of the hot gas recovery pipe is connected to the waste gas collection of the fluidized bed. processing system. The invention has the advantages of simple structure, convenient assembly, full utilization of resources, environmental protection and the like.

Description

technical field [0001] The invention relates to a process system in the coking coal preparation process of a coking plant, in particular to a waste heat utilization system in the coking coal preparation process. 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 combined crushing of several kinds of coking clean coal, the particles ≤ 3mm are over-crushed, while the particles > 3mm are not crushed in place. The high water content of the clean coal will also cause more gas to be burned d...

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Problems solved by technology

[0005] Aiming at the many problems existing in the coking coal preparation process of traditional coking plants, as well as the limited space of the coal humidity control technical transformation project in the existing coking plants, the present invention provides a simple structure, convenient assembly, full utilization of resources, green environmental protection, both It can be used in newly-built coking plants and can also adapt to the process system for waste heat utilization in the coking coal preparation process of established coking plants. This process system can not only solve many problems existing in the coking coal preparation process of traditional coking plants, but also overcome site conditions and other limitations Sexual factors, to achieve the goal of energy saving and emission reduction technological transformation

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