. Transactions. 70565580 June, 1915, tubes blownfrom 6-12 hr. beforetaking temperatures165per cent, rating. 131 520 131 540 131 550 131 548 121 530 94 530 94 535 122 129 0 0 form CO2, which runs from 22 to 23 per cent, in spite of the greatly-varying gas pressure, , between 6 and 8 and 10 and 12 rear temperature was only 495°r. This is, however, explained by K. HUESSENER 429 the fact that the boilers were only running on
. Transactions. 70565580 June, 1915, tubes blownfrom 6-12 hr. beforetaking temperatures165per cent, rating. 131 520 131 540 131 550 131 548 121 530 94 530 94 535 122 129 0 0 form CO2, which runs from 22 to 23 per cent, in spite of the greatly-varying gas pressure, , between 6 and 8 and 10 and 12 rear temperature was only 495°r. This is, however, explained by K. HUESSENER 429 the fact that the boilers were only running on rated load. The gas inquestion contained 25 per cent. CO and by referring to Fig. 12 we findthat the loss through waste gas was per cent, for every 100°F. (stacktemperature - boiler room temperature) or a total of 15 per cent., sothat the total boiler efficiency, assuming radiation and conduction lossesat 5 per cent., is about 80 per cent. An interesting test on a large load was run by the Pittsburgh Steel. Fig. 16.—Gas-Pressure Chart. Co at Monessen. I give below the complete results of this test as theywere put at my disposal. It must be kept in mind that this test wasfor the purpose of ascertaining the highest load compatible with goodboiler efficiency, as will be seen from the low draft in combustion chamber of only in. • ^ v id ^ u The boiler used was equipped with a modification of the iiradstiawburner designed by J. S. Fraser. As I have already explained, it israther dangerous to run a boiler on its maximum load, since one is con-stantly verging on incomplete combustion, as was the case in the presentinstance. Mr. Frasers modification which is, as will be seen from Fig. 430 DEVELOPMENT IN THE COMBUSTION OF BLAST-FURNACE GAS 18 the application of the stove-burner principle to the boiler burner,gave nevertheless excellent results. By comparing the analysis in thecombustion chamber with the stack analysis it will be seen that there wasconsiderable air infilt
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
