Temperature-adjustable four-effect drying system

Abstract

The invention discloses a temperature-adjustable four-effect drying system. The temperature-adjustable four-effect drying system of an automatic temperature constant dehumidifying device comprises at least two dehumidifying heat pump assemblies and an auxiliary heat exchange assembly. Each dehumidifying heat pump assembly comprises at least one refrigerant module and an air module. The auxiliary heat exchange assembly is formed by connecting two heat exchangers in series through a circular pipeline. A refrigerant inlet and a refrigerant outlet are formed in the circular pipeline. The system has the following advantages that the dehumidifying amount can be increased by 10% or above, the closed drying process can be achieved, no peculiar smell is emitted in the sludge drying process, a deodorization device does not need to be mounted, the circular air amount and the dehumidifying air amount are designed separately, the sludge drying cycle can be shortened, dust caused by sludge drying is prevented, the structure design requirement of a sludge drying model can be met, meanwhile, the structure size of dehumidifying heat pump main bodies can be reduced, and the system is compact in structure and small in occupied area and maintaining space.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of drying equipment, in particular to a temperature-adjustable four-effect drying system. [0003] 【Background technique】 [0004] At present, the commonly used drying systems are mainly direct drying drum technology, multi-layer step drying technology, rotary disk drying technology, fluidized bed drying technology and so on. However, sludge belt drying has attracted widespread attention due to its strong adaptability to wet sludge, less maintenance parts, long service life, and low drying temperature, and has a good market application prospect; heat pump dehumidification combined with mesh belt drying sewage Sludge drying technology is a new trend of sludge belt drying, which has great advantages in terms of energy saving and environmental protection. Sludge heat pump dehumidification and drying technology will dominate sludge belt drying. [0005] However, the dehumidification performance of the existing de...

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Problems solved by technology

[0005] However, the dehumidification performance of the existing dehumidification heat pump drying equipment is affected by the working conditions. The drying process requires external air cooling or cooling water for temperature adjustment. It is not suitable for different air volume requirements in the drying stage of the sludge drying process; it is not suitable for different temperature and humidity requirements in the drying stage of the material drying process; it cannot realize the automatic adjustment of the drying temperature, and cannot realize the low temperature condition. Drying, especially to achieve low-temperature drying; when the moisture content of the material is high, the circulating air volume is relatively small, and the drying cycle is long; the floor area is large and the maintenance space is large, which cannot meet the requirements of the modular structure

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