MVR belt sludge drying machine

Abstract

The invention discloses an MVR belt sludge drying machine which comprises a drying box body, an auxiliary box body, a sludge forming device, at least one layer of mesh belt, a vapor heater, an MVR vapor compression device and a sludge heat exchanger, wherein the auxiliary box body 2 is connected with the drying box body 1 through an air duct; the mesh belt is arranged in the drying box body; the sludge forming device is arranged above one end of the mesh belt, and is used for squeezing sludge to be dried into strips to be sent to the mesh belt; the MVR vapor compression device and the vapor heater are mounted in the auxiliary box body on the side of the drying box body. The sludge is subjected to drying treatment through circulating vapor of the MVR vapor compression device and the vapor heater; the MVR belt sludge drying machine adopts MVR vapor compression work and conducts totally closed operation, the condensing temperature is increased through vapor compression, the purpose of cyclic utilization of heat is achieved by utilizing heat exchange by the vapor heater 5, and the operation cost is reduced.

Description

technical field [0001] The invention relates to the field of drying equipment, in particular to an MVR sludge belt dryer. Background technique [0002] Sludge drying is a process that uses thermal energy to remove most of the water content from sludge. By heating, the moisture in the material (generally refers to water or other volatile liquid components) is vaporized and escaped to obtain a specified moisture content. of solid materials. The purpose of drying is to meet the needs of material use or further processing. Since natural drying is far from meeting the needs of production development, various mechanized dryers are more and more widely used. [0003] The drying process consumes a lot of heat energy. In order to save energy, some materials with high moisture content, suspensions or solutions containing solid substances are generally dehydrated mechanically or evaporated by heating, and then dried in a dryer to obtain dry solids. During the drying process, it is n...

AI Technical Summary

Problems solved by technology

[0008] (1) High energy consumption: sludge drying is a process of net energy consumption, and energy consumption usually accounts for more than 80% of the total cost of sludge treatment; traditional sludge drying equipment uses heating and dehumidification, and the energy utilization rate is low; Evaporating one ton of water consumes about 1.5 tons of steam and about 70kw.h of electricity;

[0009] (2) There are safety risks, sludge drying to avoid explosion usually uses inert gas to reduce oxygen content;

[0010] (3) Not environmentally friendly: a large amount of odor is emitted, and a special tail gas treatment system is required; the working environment of the drying workshop is poor; the heating source of the drying process is a boiler, which also emits a large amount of tail gas, and there is a secondary sludge problem;

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