| OCR Text |
Show produce 2% O2 (about 10% excess air) in the products of combustion . Water pressure and compress e d air pres sure to the atomizer we re s e t at 10 to 20 psig, respectively. The temperature of the combustion products leaving the basel slag receiver was indirectly monitored by recording the interior wall temperature of the base. A water-cooled, Type R thermocouple in th e discharge end of the base was connected to a strip chart recorder and the rate of temperature rise within the base was monitored. As a final start-up procedure before actual incineration, the waste rotameters were calibrated by passing waste through the rotameters into a 500 ml beaker and recording the time needed t o fill the beaker. After calibration, water to the atomizer was shut down and waste was introduced to the incinerator at a pressure of 20 psig. The compressed-air pressure was adjusted to 30 psig. Three types of data were collected during the 24-hour test: 1 . Operating parameters of system fluids 2 . Heat removed by water-cooled annulus 3. Visual observation of the incinerator interior during and after testing. Each is described in the sections that follow. 1. Operating Parameters of System Fluids Table 10 presents operating data for natural gas, primary combustion air, liquid waste, secondary combustion air, and products of combustion. The frequency of data collection is noted. The incinerator operated continuously except for a temporary shutdown to clean debris from the waste supply line. During cleaning of the waste line, the atomizer was accidentally burned because no waste or cooling water was passing through it. After cleaning the waste line and replacing the atomizer, the incinerator was relit and brought back up to temperature and data collection resumed. From Table 10, the ratio of individual fuel firing rates to the total incinerator firing rate can be found by determining the firing rate of the waste and adding this quantity to the natural gas firing rate. using the data of Test No.1 as an example, the calculation is as follows: Heating Firing Rate = Wa s t e ) x ( Wa s ~ e ) x ( ~a s t e ) x ( 0 r g ani c . ) (Flow Rate Denslty Heatlng Value Concentratlon = (8 1 ~) x (10 ~) x (7100 Btu) x (0.46) · h gal lb = 0.265 x 106 Bht u 28 |
