Efficient energy-saving pulp dewatering and drying equipment

Abstract

The invention discloses efficient energy-saving pulp dewatering and drying equipment which mainly comprises a double-roller pulp squeezing machine with a hot rolling structure, a two-segment drying chamber, a microwave generator, a heat conductive oil boiler, an air preheater, a heat exchanger and the like. The double-roller pulp squeezing machine with the hot rolling structure is characterized in that waste heat of exhaust gas of a system can be used for carrying out thermal conduction on a pulp plate so that pulp drying conditions can be optimized; the two-segment drying chamber carries out constant-speed drying and decelerating drying on pulp respectively; the microwave generator is arranged and works on a position close to a turning point from the constant-speed dewatering stage to the decelerating dewatering stage of the pulp, and is used for improving the drying speed of a pulp decelerating drying segment and reducing energy consumption; the air preheater is used for recycling the waste heat of flue gas exhausted by the thermal conductive oil boiler and preheating fresh air supplemented to the system. The efficient energy-saving pulp dewatering and drying equipment has the advantages of being simple, high in drying speed, high in energy utilization rate, wide in application range and the like.

Description

technical field [0001] The invention belongs to the technical field of industrial drying, and can also be applied to other industrial drying fields. It is a process and equipment designed for pulp drying, and in particular relates to a high-efficiency and energy-saving pulp dehydration drying equipment. Background technique [0002] my country imports a large amount of pulp every year, and drying the pulp can make the pulp easy to store and transport. At present, the commonly used technologies for pulp drying mainly include airflow drying and hot air drying (that is, flash drying). [0003] The main process of air-flow drying is: after the pulp with a dryness of about 3% is squeezed by the squeezer, the dryness reaches about 50%; The pulp is in the form of flocs with a diameter of several millimeters; the pulp flocs are sent to the bottom of the vertical drying tower, and are blown from bottom to top by hot air in the tower. When a certain dryness is reached, the pulp is di...

AI Technical Summary

Problems solved by technology

[0006] Microwave drying has the advantages of fast heating speed, high energy utilization rate, and small equipment footprint. Its main disadvantages are poor heating uniformity, difficulty in controlling product quality in the later stage of drying, limited production capacity, and high equipment maintenance costs.

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