Exhaust-free highly-effective drying system and method

Abstract

This invention relates to a non gas discharging high efficient drying system and its method. The discharged gas from dryer is firstly filtered and purified by filtering purification device. The generated heat energy is used to heating the dilute solution after dehumidifying in solution regenerating device. It fulfills the regeneration of concentrated solution. At the same time, part of the water vapor in the discharged gas separates out and becomes condensing water. It reduces the moisture content of discharged gas. Then, in heat regenerating device, the heat energy of the discharged gas from solution regenerator is used to heating the dry air after dehumidifying. It reduces the temperature, humidify and enthalpy of the wet air entering into dehumidifying device. In the dehumidifying device, the wet air undertakes solution dehumidifying processing. The dry air after dehumidifying enters into the heat regenerating device for initial heating. Then, the air passes through heating device in order to reach the parameter request of drying technique. At last, the dry air enters into the dryer to dry the materials. This invention saves energy and protects environment.

Description

technical field [0001] The invention relates to the technical field of drying, in particular to an exhaust-free high-efficiency drying system and method. Background technique [0002] Drying technology is widely used in various industrial and agricultural productions such as textiles, chemicals, dyeing and finishing, food, pharmaceuticals, and papermaking. In general drying technology, the humid air after drying is directly evacuated. Although the discharged humid air has a certain temperature, it generally cannot be used directly, so it is mostly evacuated directly. [0003] At present, many waste heat recovery technologies have been proposed to recover the heat energy in the exhaust gas. For example, in the document [R. Tugrul, Ogulata. Utilization of waste-heat recovery in textile drying. Applied Energy 79 (2004) 41-49], a drying system as shown in Fig. 1 is proposed. Since the exhaust flow is equal to the supplementary fresh air flow, but the exhaust temperature T e ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the waste heat of the exhaust gas in the above drying system cannot be fully recovered and the energy waste in the process of condensation, dehumidification and reheating, the present invention adopts the solution dehumidification technology to dehumidify and reuse the dried exhaust gas, so as to avoid the exhaust gas The problem of waste heat is solved, and the energy waste of condensation, dehumidification and reheating is solved

Images