METHOD AND DEVICE FOR DRY DUST REMOVING AND CLEANING GAS PRODUCED IN IRON PRODUCTION OR COAL GASIFICATION

摘要

The invention relates to a method for dry dust removal and dry cleaning of gas laden with dust and pollutants, as in gas incident to pig iron production systems in the production of pig iron, or incident to iron production systems in the production of iron or in gas produced in coal gasification systems, and to a device for carrying out the method. In the process, an additive comprising reagent and alternatively adsorbent material is added to the gas stream prior to the beginning of the dust removal following a preliminary separation step and after the temperature of the gas stream is adjusted to a temperature greater than 60°C and less than a temperature that would cause damage to the equipment performing the dust removal. This additive cleans the gas stream and is removed from the gas stream together with the solid particles that were present in the gas stream prior to the addition of the additive upon removal of the dust.