![]() ![]() ![]() With mechanical strokers and artificial draught it would be quite reasonable to expect 12% to 15% CO 2. When the boiler plant of Lancashire boiler type employs hand firing with natural draught system 10% to 12% CO 2 in flue gases would be considered good practice. The excess air is indicated by CO 2% in flue gases. The excess air may approach 100 per cent but the modern practice is to use 25 to 50 per cent. The total quantity of air supplied varies with the quantity of the fuel, rate of combustion, system of firing and the draught intensity. With natural draught system the excess air is more in comparison with the artificial draught system. A large amount of excess air has a cooling effect on the process of combustion and represent a loss, and in order to avoid this cooling effect air is pre-heated before it enters the furnace of a boiler. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |