Solar heat collection type drying device and control method thereof

Abstract

The invention discloses a solar heat collection type drying device and a control method thereof. The solar heat collection type drying device comprises an air supply device, a heat exchange device (2) and a solar heat collection device. The air supply device comprises a fan (1) capable of rotationally absorb outside airflow and conducting acceleration and pressurization on the airflow, so that materials are dried through the accelerated and pressurized airflow. The heat exchange device (2) is arranged in the fan so as to conduct heat exchange on the airflow entering the fan. The solar heat collection device is used for obtaining solar energy and for transferring the obtained energy to the airflow in the fan through the heat exchange device so as to achieve an airflow heating function. According to the solar heat collection type drying device and the control method thereof, the solar energy can be obtained through the solar heat collection device, the obtained energy is transferred to the airflow in the fan through the heat exchange device, so that the airflow heating function is achieved, heating and heat transferring functions can be achieved on the materials effectively, the drying rate is increased, the drying efficiency is improved, the solar energy is effectively used under the circumstance of the same dry degree, and less energy is consumed.

Description

technical field [0001] The invention relates to the technical field of biomass power generation material drying, in particular to a solar heat collecting drying device and a control method thereof. Background technique [0002] At present, energy and environmental issues have become the focus of global attention, and energy shortage is one of the main problems that have plagued the development of human society for a long time. Oil, coal, and natural gas are still the main sources of fuel. [0003] With the depletion of fossil energy and the seriousness of environmental problems, the development and utilization of clean and renewable energy has become an urgent issue. Faced with this severe situation, human beings urgently need to find new alternative energy sources and find a way out for sustainable development. In this context, biomass energy is the only renewable energy that can be stored and transported, and its advantages of high-efficiency conversion and clean utiliza...

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Problems solved by technology

[0005]However, due to the characteristics of biomass itself, such as high moisture, low calorific value, high volatile matter, poor thermal stability, and low ignition point, the moisture content has a relatively large impact on its properties. Prominently, the water content of biomass in the furnace is generally about 45%. When it is directly burned, it will reduce the combustion temperature, increase the loss of exhaust smoke, reduce the thermal efficiency of the boiler, and increase the operating cost.

[0006]The existing technology is to achieve drying by traditional means such as covering the material and turning over the material by an excavator. During the process of covering the material, a large amount of carbon source will be consumed and the calorific value of biomass will be reduced. In the process of material turning, a lot of manpower and material resources need to be invested, and the effect is not ideal, and the input-output ratio is seriously unbalanced; the drying process is slow, resulting in a large amount of stock, which in turn increases cash flow, making the operation of the enterprise difficult, to a certain extent. It is said that because the existing drying devices for drying biomass need to consume a lot of energy, resulting in large energy consumption, high cost, and limited drying effect, production units urgently need a low-cost, high-efficiency biomass fuel drying system to reduce its production costs, submitting operational benefits

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