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Show I Page 4 Start-up In August 1991, John Zink assisted the boiler manufacturer during start-up. The boilers were provided with excellent visibility of all the waterwall surfaces including all sidewalls, rear walls, superheat cavity and a view across each burner tile exist. John Zink Company evaluated all three boilers from minimum steam load to maximum steam load. All boilers were firing refinery fuel gas. Initial Firing Results The flame from Burner No.4 (bottom left) on all three boilers impinged on the lower left hand sidewall tubes. 2. The flames from Burner No.2 (upper right) and Burner No.3 (Lower right) in all three boilers merged toward the left hand side of the furnace. 3. The lower rear of the furnace was smoky and cyclic. 4. 02 was required between 6% and 8% to maintain a clear stack (opacity <10). 5. The flames from the lower burners (No.3 and No.4) pounded the rear wall, rolled under in a clockwise rotation, and "snaked" back along the floor toward the front wall. 6. The flames from the upper burners (No 1 and No.2) split about mid-way the length of the furnace, with a portion of the flames short circuiting into the screen tubes above and the remaining portion driving down on top of the lower burners' flames. |
