Download HANDBOOK OF ENVIRONMENTAL ENGINEERING - Air Pollution by Lawrence K. Wang, Norman C. Pereira, Yung-Tse Hung PDF

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By Lawrence K. Wang, Norman C. Pereira, Yung-Tse Hung

A panel of revered pollution keep an eye on educators and training pros significantly survey the either rules and practices underlying keep an eye on approaches, and illustrate those with a bunch of exact layout examples for training engineers. The authors talk about the functionality, capability, and obstacles of the foremost regulate processes-including cloth filtration, cyclones, electrostatic precipitation, rainy and dry scrubbing, and condensation-as a foundation for clever making plans of abatement systems,. extra chapters severely research flare techniques, thermal oxidation, catalytic oxidation, gas-phase activated carbon adsorption, and gas-phase biofiltration. The participants aspect the easiest on hand applied sciences (BAT) for pollution keep an eye on and supply price information, examples, theoretical motives, and engineering equipment for the layout, set up, and operation of pollution procedure apparatus. tools of functional layout calculation are illustrated by way of quite a few numerical calculations.

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Extra resources for HANDBOOK OF ENVIRONMENTAL ENGINEERING - Air Pollution Control Engineering

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4. Gas Preheaters The temperature of the emission gas stream can be increased by using a gas preheater. Increasing the temperature of the emission gas stream reduces the likelihood of condensation. In fabric filters, condensation can plug or blind fabric pores. Additionally, condensation can increase the corrosion of metal surfaces in a control device. To overcome these problems, a gas preheater can be used to increase the temperature of the emission gas stream above the dew point temperature. Three methods are commonly utilized to raise the gas emission temperature: direct-fired afterburners, heat exchangers, and stream tracking.

Flue gas moisture determined by the psychrometric chart method. high velocity and is near atmospheric pressure. Moisture on the wick on the wet bulb must be present during the readings. From a psychrometric chart, the humidity (H) in mass of water per mass of dry air can be obtained as shown in Fig. 9. The wet-bulb temperature (tw) is read at the saturation line, and the adiabatic saturation line is followed until the dry-bulb temperature (td) is reached. This gives the humidity. Water content is expressed as percentage of moisture by volume (W).

36): Air Quality and Pollution Control 33 We,l = We1,l + We2,l + ... + Wen,l (36) where We,l is the particulate loading for the combined gas stream (lb/h). Equation (37) shows how particulate loading in the combined gas stream is converted from lb/h to g/acf: ( ) We,g = We,l Qe,a (7, 000 g 1b)( h 60 min ) (37) where We,g is the particulate loading for the combined gas stream (g/acf). 5. 01) ∑ ye1,i he1,i (38) i=1 where he1 is the heat content in gas stream 1 (Btu/scf), ye1,i is the volume percent of component i in gas stream 1 (vol%), hel,i is the heat of combustion of component i in gas stream 1 (Btu/scf) (see Table 6), and n is the number of components in gas stream 1.

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