Spray drying system

Abstract

The invention provides a spray drying system. The spray drying system comprises a shell, wherein a volute heating plate and a vertical cleaning brush which are vertically placed are arranged in the shell; the outer end of the volute heating plate is communicated with a steam inlet; the inner end of the volute heating plate is communicated with a hollow pipeline of the lower part of a rotating shaft arranged at the center position of the shell; the hollow pipeline is connected to a condensate outlet; the two ends of the vertical cleaning brush are connected to the rotating shaft, and the vertical cleaning brush is driven by the rotating shaft to reciprocate along the volute heating plate; a material liquid inlet pipe is arranged at the upper side of the volute heating plate; a spray head isarranged at the lower part of the material liquid inlet pipe; a horizontal drying plate is arranged at the lower side of the volute heating plate; a horizontal cleaning brush is arranged on the horizontal drying plate; one end of the horizontal cleaning brush is fixedly connected to the rotating shaft; and a discharge port is formed in the bottom of the horizontal drying plate. The spray drying system has the advantages that a crystalline material is not easy to agglomerate and harden, the material solution drying efficiency is high, and the energy saving effect is remarkable.

Description

technical field [0001] The disclosure relates to the technical field of solution concentration, evaporation and drying, and in particular to a spray drying system. Background technique [0002] At present, my country's annual wastewater discharge is more than 73.5 billion tons, and the annual sludge discharge is more than 6 million tons, and it continues to increase. With the development of large urbanization and urban cluster areas, my country's sludge treatment will eventually move towards tertiary treatment such as drying or incineration. Therefore, how to reduce the moisture content of sludge is the key to solving many problems encountered in the sludge treatment process, and it is the premise of sludge resource (agricultural, incineration, etc.) treatment, disposal and utilization. [0003] As far as the inventor knows, conventional sludge drying uses hot air as the drying medium, and the hot air contacts the sludge to take away the moisture in the sludge. But the moi...

AI Technical Summary

Problems solved by technology

But the moisture absorption ability of hot air is not strong, so when hot air is used as the drying medium, the flow rate of the drying medium is large, and the drying time is long, and the efficiency is low

[0004] The currently used evaporative drying system has a flat heat exchange surface, and the material adheres to the heat exchange surface after drying and accumulates thicker, while the crystalline material is mostly composed of salt, and its thermal conductivity is very low, which seriously affects the operation of the evaporative drying process. This is the main reason for the unstable operation of the evaporative drying system

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