Low-temperature drying device for high-water-content high-viscosity sludge

Abstract

The invention relates to a low-temperature drying device for high-water-content high-viscosity sludge. The device comprises a drying chamber and a heat pump system communicating with the drying chamber; the drying chamber is provided with a material inlet strip cutting machine and a secondary strip cutting machine, the material inlet strip cutting machine is used for primary cutting of the sludgeconveyed into the drying chamber, and the secondary strip cutting machine is used for secondary cutting of the sludge during conveying of the sludge; and the heat pump system adopts a high-temperaturerefrigerant, and the heat pump system is used for heating and dehumidifying the drying chamber. According to the low-temperature drying device provided by the invention, secondary cutting is performed on the sludge, so that the forming effect of the cut strips is better, the cut strips are finer and no longer adhere to one another, and the drying effect of the sludge is greatly enhanced; and at the same time, the high-temperature refrigerant is adopted as a refrigerant, so that the drying device has a higher energy efficiency ratio and higher drying efficiency, and can satisfy drying treatment of the high-viscosity sludge with a water content of 60-85% and turn a sludge cake with a water content of 85% into sludge particles with a water content of 30% or less by one drying.

Description

technical field [0001] The invention relates to the technical field of sludge drying equipment, in particular to a low-temperature drying equipment for sludge with high water content and high viscosity. Background technique [0002] At present, the commonly used drying systems are mainly direct drying drum drying process, multi-layer step drying process, rotary disc drying process, and fluidized bed drying process. However, sludge belt drying has attracted widespread attention due to its advantages such as strong adaptability to wet sludge, less maintenance parts, long service life, and low drying temperature, and has a good market application prospect; dehumidification combined with mesh belt drying sludge Drying technology has become a new trend of sludge belt drying, which has great advantages in terms of energy saving and environmental protection. Sludge dehumidification and drying technology will dominate sludge belt drying. [0003] Existing sludge drying equipment us...

AI Technical Summary

Problems solved by technology

By cutting the sludge for the second time, the problems caused by the first cutting can be effectively avoided, so that the forming effect of the cutting is better, the cutting is thinner and no longer sticks to each other, which is conducive to enhancing the drying effect; At the same time, the high-temperature refrigerant is used as the refrigerant, which can avoid the disadvantages of low drying temperature in the prior art, so that the drying equipment has a higher drying temperature, thereby having a higher energy efficiency ratio and higher drying efficiency. It can meet the drying treatment of high-viscosity sludge with a moisture content of 60-85%, and can dry the mud cake with a moisture content of 85% into sludge particles with a moisture content of 30% or less.

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