Scholarly record
SELF-CONTAINED ENERGY-SAVING PLANT FOR DRYING VEGETABLE RAW MATERIALS
Abstract
The paper deals with the pressing issue of energy saving in the production activities of forest companies. We see the solution to this problem in involving renewable energy sources to production. However, in most cases, the drying and thermochemical processing technologies used at enterprises are not able to meet modern requirements for energy consumption, environmental friendliness, and efficiency. To supply heat and electric energy to vegetable biofeedstock drying equipment, a self-contained complex energy-saving plant was developed, consisting of a condenser kiln that works on wood and vegetable waste. A special feature of this installation is the use of a compression heat pump, which reduces heat energy consumption, as well as the pulse condensation drying mode, which is carried out without the use of water vapor. The crushed wood and vegetable waste is fed to the reactor for gasification, followed by generator gas production. The resulting gas, after cooling and additional purification, is burned in an internal combustion engine, which drives a heat pump compressor and an electric generator to provide electricity for the electric fan. Note that the heat pump and the fan operate alternately in the pulse mode. During the signal, the fan and heater with heat pipes work, and during the interruption, only the heat pump works, thus ensuring natural circulation and intensive moisture removal without the use of water vapor. The drying chamber power can be controlled using various types of fuel. In particular, research has shown that heat treatment of crushed waste in combination with granulation increases their energy efficiency. It was found that an increase in the wood fuel torrefaction temperature results in an increase of the generator gas energy intensity, which in turn increases the power of the internal combustion engine and accelerates drying. Based on the resulting data, we found that the use of torrefied crushed raw materials as an alternative energy source can increase the productivity of the entire self-contained drying plant. It should also be noted that the use of the plant in remote areas is significant for vegetable raw materials that require immediate drying with specified parameters to preserve valuable components, and at the same time allows for highly efficient energy-saving drying of biofeedstock by generating internal electrical and thermal energy.
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References15
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