Sludge energy-saving drying unit and sludge energy-saving drying method

Abstract

The invention discloses a sludge energy-saving drying unit and a sludge energy-saving drying method, belonging to the field of energy-saving drying. The unit comprises a feeder (1), a sludge dryer (2), a conveyer (3), a filtering dust remover (4), a compressor (5) and a pressure mixer (6), wherein the feeder (1) is connected with an upper feed port of the sludge dryer (2); a lower discharge port of the sludge dryer (2) is connected with the conveyer (3); an upper exhaust port of the sludge dryer (2) is connected with a gas inlet of the filtering dust remover (4); a gas outlet of the filtering dust remover (4) is connected with an inlet of the compressor (5); an outlet of the compressor (5) is connected with an inlet of the pressure mixer (6); and an outlet of the pressure mixer (6) is connected with an inlet of the sludge dryer (2). The unit and method can greatly reduce the steam consumption in the steam heat drying process, have obvious effects on environment protection, energy saving and emission reduction, and have significant social and economic values.

Description

technical field [0001] The invention relates to an energy-saving drying device and method, in particular to an energy-saving drying device for sludge and an energy-saving drying method for sludge. Background technique [0002] As the energy supply situation becomes increasingly tense, energy prices rise further, production costs of enterprises increase, and competition pressure increases. According to literature reports, the energy consumption of the drying process in my country accounts for 10% of the energy consumption of the entire processing process, the heat energy consumption of veneer drying in plywood production accounts for 75% of the total energy consumption, and the energy consumption of wood drying accounts for 40% of the total energy consumption. % to 70%, the traditional hot air drying of sludge has low efficiency, and the heat consumption of 1kg of water needs to be evaporated to 4000~6000kJ. In order to better fulfill the purpose of national energy conservati...

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Problems solved by technology

[0006] Aiming at the technical problems of low evaporation water vapor temperature, low pressure, low grade, and unfavorable recovery, the present invention provides a sludge energy-saving drying device and a sludge energy-saving drying method. Through the present invention, the use of fresh steam in the sludge drying process can be greatly reduced It has a significant effect on protecting the environment, saving energy and reducing consumption, and promoting the sustainable development of the national economy and ecological environment. It has great social significance and is in line with relevant national industrial policies.

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