Process system for utilizing waste heat in coking coal preparation process

Abstract

The invention discloses a process system for utilizing waste heat in a coking coal preparation process. The process system comprises a total boiling winnowing and drying fluidized bed and a hot waste gas waste heat utilization system, wherein the total boiling winnowing and drying fluidized bed comprises an outer shell and an air distribution plate; the air distribution plate consists of a middle air distribution bottom plate and air distribution side plates on two sides; ventilating bottom holes and ventilating side holes are respectively formed in the air distribution bottom plate and the air distribution side plates; the air distribution bottom plate is formed by connecting multiple sections of air distribution plates end to end; the air distribution plates at the front end are in a concave-convex shape, and air nozzles are arranged on the ventilating bottom holes; air caps are arranged on the ventilating bottom holes of the residual sections of air distribution plates, and discharge openings are formed in the tail parts; the hot waste gas waste heat utilization system comprises a vapor heat tube heat exchanger, a hot air inlet pipeline, a hot air blower and a hot air recovery pipeline; the hot air inlet pipeline is communicated with a sectioned air chamber; the inlet end of the hot air recovery pipeline is communicated with a waste gas collection and treatment system of the fluidized bed. The process system has the advantages of simple structure, convenience in assembly, full resource utilization, environment friendliness 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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