Venturi typical results

Lime tests with One Scrubber Loop and Without Forced Oxidation. Tests with adipic acid in lime scrubbing also were impressive in enhancing S02 removal, both on the venturi/spray tower and TCA systems. Table 4 shows some typical results of adipic acid-enhanced lime tests from the Shawnee TCA without forced oxidation. The flow diagram for these tests is shown in Figure 3. 

Factorial Test Results. Full or partial factorial tests have been conducted at Shawnee, primarily to investigate the effects of adipic acid concentration and pH on SO2 removal. These tests usually lasted 12 hours or longer, including at least 5 to 7 hours of steady-state operation. Scrubber configurations used were venturi alone, spray tower alone, combined venturi and spray tower, and TCA. Limestone was used in all scrubber configurations. Lime was used only with the venturi alone. Only the typical results from the TCA and spray tower tests are presented below to show the degree of effect of pH and adipic acid concentration on SO2 removal. 

Plug Valves These valves (Fig. fO-155) are typically limited to temperatures below 260°C (500°F) since differential expansion between the plug and the body results in seizure. The size and shape of the port divide these valves into different types. In order of increasing cost they are short venturi, reduced rectangular port long venturi, reduced rectangular port full rectangular port and full round port. 

Virtually all modern flame AAS (FAAS) instruments make use of a pre-mix nebuliser in combination with a laminar burner design. A typical design is presented in Figure 5. The flows of gaseous fuel and oxidant gases into the nebuliser create a Venturi effect across the exit of a capillary tube. As a result, liquid sample is aspirated through the capillary (at rates of 2 to 6 mL/min) and exits into the nebuhser chamber as an aerosol (with a rather wide range of droplet sizes). An impact bead or a flow spoiler is typically used to further smash up the droplets and to increase turbulence of the flow... 

Table 7 gives the results of a typical bleed stream oxidation test, Run 915-1C, which was conducted with adipic acid-enhanced limestone on the venturi/spray tower system. The effluent slurries from the venturi and the spray tower were discharged into a common effluent hold tank. The scrubber bleed stream was pumped from the effluent hold tank to an oxidation tank into which air was injected through a 3-inch diameter pipe. The final system bleed was withdrawn from the oxidation tank and sent to the solids dewatering system. 

Reference 9- 88 shows that K = 3 ft for a Bali Valve with no venturi effect or reducers (P = 1,0 = 0), and with no shaft in the flow stream (L/D = 3). Reference 9- 84 shows that the typical Cv performance of a 2-inch Full Port Ball Valve used in aerospace applications in the full open position is 440. This resulted in calculated L/D ratios between 6.5 and 8. 

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