Binocular wet sludge drying equipment

Abstract

The invention discloses binocular wet sludge drying equipment which is composed of a sludge pump (2), a wet sludge preheating drum, a wet sludge drying drum and a pipeline, wherein the wet sludge preheating drum is connected with the sludge pump (2) through the pipeline (3); the wet sludge drying drum is connected with the wet sludge preheating drum through a sludge blanking channel (8). According to the invention, steam latent heat for sludge drying is sufficiently utilized, and wet sludge entering into the wet sludge drying drum can rapidly enter into water evaporation stage because the steam latent heat preheats the wet sludge, so that the efficiency of sludge drying is improved, and energy conservation and emission reduction of sludge drying is realized; the wet sludge preheating drum is used as a direct heat exchanger between high-temperature steam and the wet sludge without auxiliary equipment such as a heat exchange fan, thereby improving the efficiency of heat exchange and simplifying the whole drying system.

Description

technical field [0001] The invention belongs to the technical field of urban sewage sludge drying, in particular to a double-tube wet sludge preheating and drying equipment, and particularly relates to its energy recovery and utilization mode. Background technique [0002] With the development of my country's economy, the discharge of urban wastewater is increasing day by day, and the production capacity of sludge plants has also been greatly increased. Sludge treatment and disposal have gradually become the focus of attention at home and abroad. At present, the sludge disposal methods in my country mainly include sanitary landfill, composting, direct land use and incineration. The moisture content of sludge is the key to restricting sludge disposal. The moisture content of sludge from 95% to 60% is the starting point of landfill and composting, and from 95% to 50% is the starting point of incineration. The traditional mechanical dehydration method can reduce the moisture c...

AI Technical Summary

Problems solved by technology

Existing drying technologies and equipment such as drum sludge drying equipment and multi-stage disc sludge drying equipment mainly rely on sludge back-mixing, and fluidized bed sludge drying equipment relies on convective heat transfer. They all have the disadvantages of low heat exchange efficiency, large heat loss, and high dust content; the rotary shaft sludge drying equipment is favored by the field of sludge drying due to its sufficient heat exchange and low dust content.

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