High-moisture sludge pyrolysis method and device

Abstract

The invention relates to a high-moisture sludge pyrolysis method and device. The device is composed of a hollow shaft (1), a shell (2), a sludge scraper (3), a set of hollow disks (4), a heat medium drainage pipe (5), an expansion joint (6), a propeller (7), a heat medium delivery pipe (8), a stirrer (9), a slide support (10), a sealed feed system (11), a sealed discharge system (12), a biomass micropowder combustor (13), a material inlet (A), a material outlet (B) and a combustible gas outlet (C). The high-temperature flue gas stably flows into the disks through the drainage pipe on the heat medium delivery pipe to perform heat conduction on the disks, so that the material is indirectly heated by the disks, shell and hollow shaft so as to be pyrolyzed. The method and device have the characteristics of high treatment capacity, stable operation, simple process, no secondary pollution, high recyclability and the like, and are economical and environment-friendly. The method and device can implement pyrolysis on high-moisture sludge, food residues, decoction dregs, wine stillage, resins and other organic wastes, thereby achieving the goals of waste treatment and recycling.

Description

technical field [0001] The invention relates to a pyrolysis method and device for high-humidity sludge, which belongs to the field of engineering thermophysics and environmental science and technology, and can be used to treat sludge (municipal, chemical, petroleum, papermaking, paint, etc.), food residues, pharmaceuticals, etc. Slag, wine residue, resin, etc., use high-temperature pyrolysis to achieve efficient disposal and resource utilization. Background technique [0002] The water content of sludge is generally high, and the water content of ordinary sludge is as high as 80%. Even after being treated by digestion techniques such as dosing and filtration, the water content is still as high as 60%, which greatly affects its energy density and quality. At present, the more advanced thermochemical conversion method generally requires the water content to be reduced to below 20%, resulting in higher cost of drying treatment in the early stage, and the material needs water va...

AI Technical Summary

Problems solved by technology

However, the drying and gasification cracking processes are still carried out separately, resulting in more equipment in the whole system, complex structure, low overall efficiency and high cost. In addition, the distribution of water vapor entering the gasification cracking furnace is not uniform enough, and the use of low rate

Chinese patent document CN205045973U provides a new type of sludge pyrolysis device, which belongs to the screw propulsion type and has a relatively simple structure. Too large, not suitable for process production; external heating has a small heat transfer area, low heat and mass transfer efficiency, and almost no reaction space

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