Solar dryer

Abstract

The invention relates to a solar dryer which comprises an oil tank, an evacuated collector tube, circulating oil pumps, a drying system and a liquid-gas heat exchanger, wherein conduction oil is stored in the oil tank, the circulating oil pumps are arranged on oil outlets of the oil tank, and the oil outlets of the oil tank comprise two paths; reflective collecting mirrors are uniformly and fixedly arranged on the periphery of the evacuated collector tube and utilizes focused solar light to heat the conduction oil flowing through the evacuated collector tube; a temperature sensor for measuring the temperature of the conduction oil is arranged in the oil tank; the conduction oil achieving the temperature requirement flows through the liquid-gas heat exchanger and exchanges heat with process gas in the drying system, so that the process gas is dried. According to the solar dryer, after the high-temperature conduction oil exchanges heat with the process gas in the liquid-gas heat exchanger, the heated process gas is used for drying substances to be dried in a drying tube, for example drying tobaccos; thus, the utilization field of solar energy is widened.

Description

technical field [0001] The present invention relates to a solar drying device, in particular to a solar drying device which realizes high-temperature heating of heat-conducting oil by means of solar energy concentration to dry shredded tobacco. Background technique [0002] Energy is an important material basis for economic and social development. Since the industrial revolution, the world's energy consumption has increased sharply, fossil energy resources such as coal, oil, and natural gas have been consumed rapidly, and the ecological environment has continued to deteriorate. In particular, greenhouse gas emissions have led to increasingly severe global climate change, and the sustainable development of human society has been seriously threatened. Generally, when cigarette factories dry tobacco, they often use combustion furnaces to supply energy. The combustion furnaces basically burn oil or natural gas, which not only pollutes the environment, but also leads to energy cr...

AI Technical Summary

Problems solved by technology

Although solar energy is ubiquitous, the solar radiant energy flow density reaching the earth is low. To obtain solar radiant energy with a high energy flow density, heat energy at a higher temperature can be obtained by means of concentrating light to provide energy for industry.

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