AIR POLLUTION CONTROL TECHNOLOGY HANDBOOK - CHAPTER 23 doc

... per unit time, so the air- to-cloth ratio also is called the superficial velocity. A high air- to-cloth ratio requires a smaller baghouse, which is less expensive. If the air- to-cloth ratio is too ... cleaning. A low air- to-cloth ratio provides a large collection area, so dust cake buildup and pressure drop increase at a lower rate than a high air- to-cloth ratio. When clean- on-demand...

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... Control- technology evaluation • New-source review A current frequent use for atmospheric-diffusion models is in air- quality impact analysis. The models serve as the heart of the plan for new-source ... dispersion. AERMOD, along with AERMET, a meteorological data pre- processor, and AERMAP, a terrain data preprocessor, are state-of-the-art air quality models destined to become EPA’s re...

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... of hazardous air pollution control equipment was published in 1986. A revised version of the handbook was published in June 1991. 1 Current information is furnished through the Clean Air Technology ... immiscible phases. Contact may be also co-current or cross-flow. Columns for the removal of air contaminants are usually designed for counter-current or cross-flow operation....

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... lbm G lb =×× = 18 01 60 1 0 29 37 25 2 . min min . . - - -moles hr-ft 2 H G Ka H lb lb ft OG y OG = == 37 25 40 931 . . . -moles h-ft -moles h-ft 2 3 9588ch11 frame Page 155 Tuesday, September ... of packing LLG lb H O lb air G lbs air L lbm Q lbm ft lb H O gal gpm L = ( ) × =×= = × = 2 2 2 1 6759 18 01 30 18 30 18 41 81 832 151 7 min min . min . . . -ft -ft -ft 2 2 2 9588ch11 fra...

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... be air dried and returned to the tower. 12.3.2 C ONTINUOUS C ONTACT , S TEADY -S TATE , M OVING -B ED A DSORBERS Countercurrent, continuous-contact, steady-state, ... adsor- bent for VOCs. A smaller portion of the porosity of coal-based activated carbon is in the lower micropore diameter size. Coal-based activated carbons are typically used to remove both lo...

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... With high concentrations of pollutant, condensers are frequently employed as preliminary air- pollution- control devices prior to other devices such as incinerators, absorbers, or adsorbers. Flows ... coefficient U o = 100 BTU/h-ft 2 - F, and the gas film heat transfer coefficient h g = 7 BTU/h-ft 2 - F. First calculate the heat exchange area from the log-mean temperatu...

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... distribution shown in Figure 19.5. The distribution produces a bell- shaped curve when plotted on the log-scale, indicative of a log-normal distribution. When the same data are plotted as a cumulative ... linear y-axis, a normal distribution would plot as a straight line. On log-probability paper, a log normal distribution would plot as a FIGURE 19.2 Sample particle size distribution on l...

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... engineer from all other engineers. As the field of air- pollution control engineering has evolved over the past several decades, it is obvious that the air- pollution control engineer must adopt the ideas and ... α = 1.0 or Air density at 500 F: Air specific heat: C - Water specific heat C - Air enthalpy at 1: H Air enthalpy at 2: H air P avg P avg 1 2 °= =° =°...

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... particle emissions. Sneakage, rapping re- entrainment, scouring re-entrainment, low-resistivity re-entrainment, and poor gas distribution can become controlling non-ideal effects that limit collection ... additive controls partic- ulates, Power Eng., 101(06), 44, 1997. 14. Durham, M. D. et al., Full-scale experience with ADA-34 2nd generation flue gas conditioning for hot-side and cold-side ES...

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... 23. 4.2 Felted Fabric 23. 4.3 Surface Treatment 23. 4.4 Weight 23. 4.5 Membrane Fabrics 23. 4.6 Catalytic Membranes 23. 4.7 Pleated Cartridges 23. 4.8 Ceramic Candles 23. 5 Baghouse Size 23. 5.1 Air- to-Cloth ... 23. 3 Cleaning Mechanisms 23. 3.1 Shake/Deflate 23. 3.2 Reverse Air 23. 3.3 Pulse Jet (High Pressure) 23. 3.4 Pulse Jet (Low Pressure) 23. 3.5 Sonic Horns 23. 4 Fab...

Ngày tải lên: 11/08/2014, 06:22