Biomass drying system based on concentrated solar energy

Abstract

The invention belongs to the technical field of biomass processing accessory related equipment, and discloses a biomass drying system based on concentrated solar energy. The biomass drying system based on the concentrated solar energy comprises a solar energy concentrating unit, a segmented drying unit, a feeding unit, an air supply unit and a control terminal, wherein the concentrating unit is used for guiding incident solar energy to a whole double-tube drying unit after focusing; and the drying unit comprises a preheating section pipe and a drying section pipe which are coaxially arranged,and a packing auger is arranged in the inner axial direction of the two section pipes, so that axial conveying of materials through the packing auger is achieved, and sunlight from the concentrating unit is simultaneously received to complete preheating and drying of the materials. In order to ensure the reliable operation of the system, the drying degree of the outlet materials is enabled to be consistent under different solar radiation intensities through the control terminal. Through the biomass drying system based on the concentrated solar energy, exhaust waste heat can be fully utilized,the energy utilization rate of the whole system is improved, the energy consumption in the drying process is reduced, and structural damage caused by uneven heating is avoided.

Description

technical field [0001] The invention belongs to the technical field of associated equipment for biomass processing, and more particularly, relates to a biomass drying system based on concentrated solar energy. Background technique [0002] The global reserves of fossil energy are constantly decreasing. In order to ensure the green and sustainable use of energy, many countries around the world are vigorously developing and researching new energy utilization technologies. Among them, biomass energy is a very important part of new energy. The original biomass material is very rich in water content. The water content of herbaceous plants can reach 70%-85%, and that of woody plants can reach 50%-70%, so there is a broad application prospect. [0003] In the existing biomass utilization technology, drying pretreatment is one of the essential and important processes. The biomass after drying has long storage period, high low calorific value and good combustion stability. The dry...

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Problems solved by technology

However, further studies have shown that this type of scheme still has the following defects or deficiencies: firstly, the dryer is largely limited by the sunshine duration and weather conditions of the solar energy, and its flexibility and applicability are not strong; secondly, in the absence of auxiliary When the device is controlled, the temperature in the drying room is low and the temperature fluctuates greatly, and it is usually impossible to completely remove the bound water in the biomass; finally, the existing solar biomass dryers generally have a large structure, are inconvenient to operate, and cannot better meet the requirements of On-demand drying and the need for more sophisticated drying metrics

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