Drying and quality improvement apparatus for slime and sludge and technology thereof

Abstract

The invention provides a drying and quality improvement apparatus for slime and sludge and technology thereof. The device mainly comprises a smoke producer, a feeder, a drying tube, a material breaking-apart device, a cyclone separator, a fine-grain conveying device, a finished-product handling device, a dust remover and a draft fan. The drying medium generated by the smoke producer and high-moisture materials to be dried administered by the feeder enter into the material breaking-apart device and the drying tube respectively. The high-moisture materials are subject to deep drying and air classification in the drying tube after being broke apart and preliminarily dried in the material breaking-apart device, wherein the particles of the size within the designed upper limit are carried into the separator by airflow and the particles of the size higher than the designed upper limit drop into the material breaking-apart device to be broke apart for a second time. Finished products collected by the separator are sent to coal yards or other places by the conveying device. Exhaust steam discharged by the separator is discharged into the atmosphere by the draft fan after being treated with the dust remover. The above apparatus has the advantages of better drying effect, reliable operation, simple system and compact structure.

Description

technical field [0001] The invention relates to the technical field of drying and upgrading, in particular to a coal slime and sludge drying and upgrading device and process. Background technique [0002] Coal preparation production will be accompanied by a large amount of primary coal slime and secondary coal slime. Due to the high moisture content, the products have no market and can only be stacked in vacant land, which not only easily causes waste of resources, but also easily leads to environmental pollution. Even after being recycled by a filter press, the slime filter cake has fine particle size, high moisture content, high viscosity, and low quality, making it difficult to achieve efficient industrial applications, and the main outlet is civilian land sales. [0003] At present, there are only a few circulating fluidized bed (CFB) boilers in the power industry that can directly use co-firing to utilize press filter slime, and the co-firing share is basically controll...

AI Technical Summary

Problems solved by technology

[0009] The coal slime drum drying process system is relatively simple and the technology is relatively mature, but there are also obvious defects such as low heat transfer coefficient, limited processing capacity of a single system, poor particle size and quality of finished products, and large floor space.

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