Method and device for drying sludge by utilizing thermal power plant waste heat

Abstract

The invention discloses a sludge drying method combined with waste heat utilization in a thermal power plant and a device thereof, comprising a plate-type feeding conveyer belt and a plate-type discharge conveying belt in which a furnace is arranged in the furnace; From top to bottom, there are multiple layers of middle-layer plate conveyor belts; each layer of middle-layer plate conveyor belts divides the internal airflow channel of the furnace into an S-shaped airflow channel; the drying wind presents an S-shaped flow trajectory in the furnace under the action of their diversion. Circuitous flow; the sludge rolls down from the end of the plate feed conveyor belt to the plate type middle layer conveyor belt of the first layer, and then rolls down from the end of the first layer plate type middle layer conveyor belt to the plate type discharge conveyor belt in turn, so that the sludge It moves in the furnace in an S-shaped trajectory from top to bottom, and is finally sent out by the plate-type discharge conveyor belt. The device can save a large amount of high-grade electric energy, and realize drying with low-grade flue gas waste heat, high efficiency, energy saving, environmental protection, high space utilization rate, and easy large-scale scale.

Description

technical field [0001] The invention relates to a sludge drying process, in particular to a sludge drying method combined with thermal power plant waste heat utilization and a device thereof. Background technique [0002] With the development of cities, the number and scale of urban sewage treatment plants have grown rapidly, and these sewage treatment plants have produced a large amount of sludge. How to properly dispose of sludge and realize sludge recycling has become a key area of ​​scientific research. [0003] Even after conventional mechanical dehydration, the water content of municipal sludge is still above 80%, which is extremely unfavorable for sludge transportation, storage and further treatment. At present, the most common sludge drying method is blast drying by electric heating. However, this drying method consumes a large amount of high-grade electric energy, resulting in energy waste. Contents of the invention [0004] The object of the present invention is...

AI Technical Summary

Problems solved by technology

[0003] Even after conventional mechanical dehydration of municipal sludge, its water content is still above 80%, which is extremely unfavorable for sludge transportation, storage and further treatment

At present, the most common sludge drying method is to blow and dry it by electric heating, but this drying method consumes a lot of high-grade electric energy, resulting in energy waste

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