JUSTIFICATION OF RECOVERY CHAMBER HEIGHT AND AIR SUPPLY INFLUENCE ON WOOD GAS OUTPUT AND QUALITY
Using vegetal biomass for energy receiving reveals a lot of difficulties connected with biomass inhomogeneity, its high moisture content, low calorific value and low ash melting temperature. One of the variants of receiving stable energy supply, when using biomass, is using gasifier. However, gasifier stable functioning is impossible without the coordination of its design and technological parameters and without investigation of their influence on wood gas quality.
So, the aim of this investigation is to determine gasifier design-technological parameters influence on wood gas output and CO concentration in it.
In this work, an experimental installation is used, consisted of gasifier, gas cooling and purified system, air supply system and gas analyzer. To determine the interconnection between air supply, recovery chamber height and wood gas quantity and Co concentration in it experiments were done. As a raw material, cubic shape wood pieces of hardwood with side measurements from 10 to 40 mm were used.
With the multifactor regressive analysis on equations that describes dependencies were received. Namely wood gas output dependency from recovery chamber height, CO concentration dependency from recovery chamber height, recovery chamber height dependency from an air supply, CO concentration dependency from air supply for different recovery chamber heights.
The results show that for minimal recovery chamber height when the air supply is growing, CO concentration goes down. For maximal recovery chamber, height CO concentration rises more rapidly than for medium chamber height. So recovery chamber height influences wood gas producing greatly.
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