Airflow energy-saving drying device and airflow energy-saving drying method

Abstract

The invention discloses an airflow energy-saving drying device and an airflow energy-saving drying method and belongs to the field of drying and energy saving. The device comprises a filter (1), an air blower (2), a heater (3), a feeder (4), an airflow dryer (5), a cyclone separator (6), a bag dust remover (7), an induced draft fan (8) and a pre-heater (9), wherein the filter (1) is connected to an inlet of the air blower (2); the air blower (2) is connected to an inlet of the pre-heater (9); an outlet of the pre-heater (9) is connected to an inlet of the heater (3); an outlet of the heater (3) is connected to an inlet of the airflow dryer (5); the airflow dryer (5), the cyclone separator (6), the bag dust remover (7) and the induced draft fan (8) are connected with one another in sequence; an outlet of the induced draft fan (8) is simultaneously connected with the pre-heater (9) and the heater (3). The airflow energy-saving drying device and the airflow energy-saving drying method are capable of recycling the waste heat of the airflow drying tail gas to the maximum extent; the problem of accumulation of moisture in circulating air is solved; the operation load of the device is effectively reduced.

Description

technical field [0001] The invention relates to an airflow energy-saving drying device and an airflow energy-saving drying method, in particular to a sludge drying device and process using hot air as a drying medium and closed-circuit circulation of waste heat tail gas. Background technique [0002] According to statistics, the drying energy consumption of various industries in the UK accounts for about 8% of the total energy consumption of industrial systems, and 12% in my country. At present, the utilization rate of drying energy in my country's general chemical industry production is only 20% to 60%. Most of the energy is discharged with the tail gas, resulting in a large degree of waste of resources and energy. Therefore, the utilization of waste heat from drying exhaust gas is an important direction of drying and energy saving research. [0003] At present, the utilization of waste heat from air-flow drying tail gas has gradually attracted the attention of engineering ...

AI Technical Summary

Problems solved by technology

For a multi-stage drying system, the first method is completely ineffective, the second method has wide applicability, but has less heat recovery, and the third method uses more waste heat, but with the accumulation of moisture in the air, the mass transfer driving force decreases Small, even unable to achieve the expected drying effect

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