Circulating fluidized bed boiler for combustion papermaking waste residue and sludge

Abstract

The invention provides a circulating fluidized bed boiler for combustion papermaking waste residue and sludge. The circulating fluidized bed boiler returns materials smoothly and is enough in output and insusceptible to high temperature corrosion of a high temperature superheater and a low temperature superheater and low temperature corrosion of an air preheater, and the superheaters and a coal economizer cannot accumulate dust easily. The technical scheme is that the circulating fluidized bed boiler comprises a boiling drum, a hearth, the low temperature superheater, the coal economizer, the air preheater, a feeding device and an ignition device under a bed. The ignition device under the bed and a deslagging pipe are arranged at the bottom of the hearth, the feeding device is located on the half lower portion of the hearth, the boiling drum is supported at the top of the hearth, the hearth is communicated with a flue, and the low temperature superheater, the coal economizer and the air preheater are arranged in the flue. The circulating fluidized bed boiler is characterized in that inlets of a high temperature thermal insulation volute cyclone separator are bilaterally symmetrically connected to an outlet of a rear wall of the upper portion of the hearth, and an outlet positioned at the top of the high temperature thermal insulation volute cyclone separator is connected with the flue.

Description

technical field [0001] The invention relates to the technical field of a circulating fluidized bed boiler, in particular to a circulating fluidized bed boiler burning papermaking waste residue and sludge. Background technique [0002] my country's paper industry is a relatively serious pollution industry. A large amount of waste residue and sludge generated in the production process, and waste plastic garbage picked up from paper mills have not been scientifically treated and are piled up everywhere. Waste plastics cannot be degraded in nature for a long time, which will cause serious environmental pollution hidden dangers. Some of them are burned everywhere, emitting unpleasant and poisonous odor gas, which seriously pollutes the air. It not only damages the ecology, but also threatens the physical and mental health of local people. [0003] Papermaking sludge is the terminal product discharged after wastewater treatment in paper mills. It is mainly composed of short fi...

AI Technical Summary

Problems solved by technology

[0005] At present, circulating fluidized bed boilers using such substances in China generally have poor material return, insufficient output, high-temperature corrosion of high- and low-temperature superheaters, dust deposition in low-temperature superheaters and economizers, and low-temperature corrosion of air preheaters.

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