Methods to reduce fly ash volume
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Our unit uses an Ende powder gasification furnace; during actual operation, the amount of fly ash is too high while the amount of furnace ash is too low. If the air volume supplied for injection is increased, it will cause the gas to burn in the upper part of the furnace. How is the operation at your facility, and how is the amount of fly ash controlled?
(1) Reduce air supply volume； (2) Reduce the temperature of the gas (at the upper part of the furnace) ； (3) Collect the ash and send it back into the gasifier!
1. The Ende furnace suffers from the problem of excessive emissions at both the top and bottom; the only solution is to control the proportion of fine coal powder fed into the furnace. 2. The fine powder in coal is separated first; after it is shaped, it is fed into the gasification furnace. 3. Increase the system pressure – is that correct? This post was last edited by hldxc on 2009-2-5 16:01]
Our company has handled similar projects: after incinerating fly ash, it is washed for pre-treatment, and then evaporation technology is used to crystallize the useful salts (potassium chloride, sodium chloride) present in the liquid, thereby generating economic value that can offset the operating costs. Technology used: MVR (Mechanical Vapor Recompression), an evaporation technique introduced in China in recent years. It relies on only one type of energy source – electricity (a clean energy source); it does not require fresh steam or condensed water, occupies less space, and features fully automated control. Evaporation can take place at low temperatures, around 40 degrees Celsius. This technology is particularly suitable for evaporating saline wastewater, as it has low energy consumption. The cost of evaporating one ton of water ranges from approximately 17 to 60 yuan. This technology has been fully applied in various industries abroad.