air pollution control equipment selection guide by kenneth c schifftner

... Group, Inc Kansas City, Missouri © 2002 by CRC Press LLC Introduction Welcome to the Air Pollution Control Equipment Selection Guide The selection of air pollution control hardware can be a daunting ... to read, technologically accurate reference book that will make the selection of air pollution control equipment easier for you © 2002 by CRC Press LLC Contents Chapter Air pollution control 101 ... AIR POLLUTION CONTROL EQUIPMENT SELECTION GUIDE Kenneth C Schifftner LEWIS PUBLISHERS A CRC Press Company Boca Raton London New York Washington, D .C Library of Congress Cataloging-in-Publication...

Ngày tải lên: 11/08/2014, 09:21

... required to control the speci c pollutant Adsorbents exhibit certain physical characteristics with respect to pore size These characteristics are generally called macropores and micropores as ... process is more mechanical than chemical An exception to the latter is chemically treated adsorbents wherein the pores are precharged with a chemical that reacts with the contaminant upon contact ... interfering compounds The process of activating activated carbon is basically one of opening up its pores The carbon can be acid-washed then carefully heated in a reducing atmosphere or it can be...

Ngày tải lên: 11/08/2014, 09:21

... Some particular bacteria strains use their enzymes to cleave organic molecules or extract speci c elements (such as sulfur) thereby changing the characteristics of the contaminant molecule A number ... sufficiently © 2002 by CRC Press LLC Table 3.1 Common Pollutants Recognized as Biodegradable Atrazine Acetone Acrylonitrile Antracene Benzene Benzoic acid Benzopyrene Butanol Butylcellosolve Carbon ... of the contaminant Figure 3.3 shows a compact gas cleaning device using an enzyme solution supported on a gauze type media © 2002 by CRC Press LLC Figure 3.3 CAP™ “Clean Air Plant” compact biofilter...

Ngày tải lên: 11/08/2014, 09:21

... precipitators Silicon control rectifiers: Silicon control rectifiers are the switches that control power input to the electrical field The voltage control turns the silicon control rectifier on and off ... operation, AC is applied to the voltage control cabinet Inside the cabinet is a voltage control and silicon control rectifier The voltage control flow of current through the silicon control rectifier Current ... of conduction characterized in dust: surface conduction and volume conduction Dust resistivity plays a major role in defining electrostatic precipitator collection efficiency It is generally accepted...

Ngày tải lên: 11/08/2014, 09:21

... that could damage the collecting media or cause a fire In some cases, a suitably designed cyclone collector is used to protect the baghouse Operating principles Fabric filter collectors function by ... processes to be considered an air pollution control device Centrifugal force alone was not enough As time went by and air quality standards became more stringent, a fabric filter collector became ... process For example, at one time © 2002 by CRC Press LLC Figure 7.2 Nuisance dust collector with drum (American Air Filter) a drop out box (settling chamber) could in some cases meet the collection...

Ngày tải lên: 11/08/2014, 09:21

... particle concentration to areas of low concentration As the particles contact the filters’ fibers and are collected, the concentration in the air near the fibers’ surface goes to zero This cycle ... that are economically controlled by fiberbeds This application is similar to lube oil reservoir vents © 2002 by CRC Press LLC Figure 8.6 1000 ACFM on five-station machining center (Advanced Environmental ... wet scrubbers, particularly hydrochloric acid scrubbers, because the reaction with the scrubbing liquid can be violent and creates a visible emission from the scrubber These are typically cool...

Ngày tải lên: 11/08/2014, 09:21

... 2002 by CRC Press LLC Figure 9.3 Multilayer mesh pad (Kimre, Inc.) Figure 9.4 Crossflow scrubber (Kimre, Inc.) Figure 9.5 Multilayered absorber module (Kimre, Inc.) © 2002 by CRC Press LLC Figure ... gases can be difficult to scrub Figure 9.7 shows a packaged unit that includes a recirculation pump and chemical neutralization system Sprayed with a suitable biocide, these type devices can also ... gas in contact with the liquid, the media is thus inclined so that the gas helps hold the liquid in the media © 2002 by CRC Press LLC Figure 9.7 Packaged scrubber for semiconductor application...

Ngày tải lên: 11/08/2014, 09:21

... velocity is reduced to 10 to 12 ft/sec to accommodate a chevron or spin © 2002 by CRC Press LLC vane droplet eliminator If a mesh pad is used, the gas velocity is decreased to to 10 ft/sec Gas ... Figure 10.4 ROTABED scrubber (Bionomic Industries Inc.) © 2002 by CRC Press LLC Figure 10.5 ROTABED grid (Bionomic Industries Inc.) stability is achieved This free energy caused by the rotation of ... followed by a rapid reaction of the gas with chemicals in the liquid For particulate capture, the primary capture mechanism is impaction Particulate above 10 µm aerodynamic diameter can be removed...

Ngày tải lên: 11/08/2014, 09:21

... drive The Ducon UW-4 type scrubber uses a primary cyclonic separation stage followed by a wetted fan, followed by another cyclonic separation stage The primary cyclonic zone is used to centrifugally ... 2002 by CRC Press LLC Figure 11.3 Hydrop scrubber (T-Thermal Company) Figure 11.4 Rotary scrubber (Trema Verfahrenstechnik GmbH) © 2002 by CRC Press LLC Primary mechanisms used The primary particulate ... the conveying velocities these devices need to successfully control dust at high loadings Gas inlet velocities in the 45 to 60 ft/sec are not uncommon The ducting to the moving device must be carefully...

Ngày tải lên: 11/08/2014, 09:21

... © 2002 by CRC Press LLC Design basics The contaminant solubility, vapor pressure characteristics, and the scrubbing liquid’s capacity for that contaminant control the actual amount of packing ... media can act as a liquid filter and plug © 2002 by CRC Press LLC Figure 12.6 Structured ceramic packing (Lantec Products, Inc.) Primary mechanisms used Gas absorption in a counterflow (vertical ... machines The individual contaminant gas molecule is only in contact with the descending liquid for a fraction of a second By increasing the number of chance such random contacts through increasing...

Ngày tải lên: 11/08/2014, 09:21

... dryer (Bionomic Industries Inc.) © 2002 by CRC Press LLC Spray scrubbers using cyclonic action apply impaction and interception forces to the gas stream and therefore exhibit higher particulate removal ... volume) can occur Multiple spray levels increase the probability that all zones are covered Once absorption occurs, the chemical reaction kinetics in the liquid may be slow In FGD systems, the scrubbing ... allow crystal formation and settling Residual crystals are allowed to recycle to help scour the scrubber interior and reduce hard scaling Sometimes, chemical additives (such as adipic acid) are...

Ngày tải lên: 11/08/2014, 09:21

... efficiency losses result © 2002 by CRC Press LLC Dilution strategies FGR acts primarily to cool the flame and secondarily as a dilution strategy for the oxygen in the combustion air Actually, recirculating ... thus reduce NOx from the thermal mechanism One such thermal strategy is flue-gas recirculation (FGR) By recirculating a portion of the flue gas into the combustion air, the flame is cooled A secondary ... concentration is less important because it does not change much with little or lots of air However, the oxygen concentration changes markedly with increase in combustion air, as it is being consumed...

Ngày tải lên: 11/08/2014, 09:21

... fuel burner Air source (blower or natural convection) Furnace (temperature controlled chamber where the oxidation reactions occur) Stack (to direct the combustion products to atmosphere) Control ... to control the acid gases produced If particulate is also present or is created through the combustion process, particulate control devices such as Venturi scrubbers, dry scrubbers, or wet electrostatic ... electrostatic precipitator, etc., where particulate matter, and sometimes acid gases are removed from the products) NOx (nitrogen oxides) reduction hardware (catalytic, noncatalytic or wet scrubber...

Ngày tải lên: 11/08/2014, 09:21

... loading exceeds approximately to grs/dscf © 2002 by CRC Press LLC The vertical vessel velocities are similar to other cyclonic type wet scrubbers, that is, about to 12 ft/sec vertical velocity Gas ... sufficiently large particulate, a vane type scrubber can provide economical performance versus medium to low energy competition such as Venturi scrubbers Savings can accrue from reduced scrubbing liquid ... reduced This action helps to increase particulate capture A popular and clever vertical cage type vane scrubber is made by Entoleter, Inc (Hamden, CT) Figure 18.2 shows this vane cage as viewed...

Ngày tải lên: 11/08/2014, 09:21

... by CRC Press LLC Figure 19.4 Composite fractional efficiency curve (From Schifftner, K and Hesketh, H., Wet Scrubbers, 2nd ed., Technomic Publishers, Lancaster, PA, 1996.) determined by a cascade ... recausticizing section of a Kraft pulp mill) often use Venturi scrubbers Agricultural product rotary dryers are often equipped with primary product collecting cyclones, which are followed by ... eliminators (chevrons) that provide a surface upon which the droplets impact, accumulate, and drain If the © 2002 by CRC Press LLC MIST ELIMINATION TECHNOLOGY Droplet-Free Air Out Droplet-Laden Air In...

Ngày tải lên: 11/08/2014, 09:21

... www.diamondpower.com © 2002 by CRC Press LLC Amcec, Inc 2525 Cabot Drive Suite 205 Lisle, IL 60532 www.amcec.com Babcock & Wilcox Company 20 South Van Buren Avenue Barberton, OH 44203 www.babcock.com Banks ... resources you may consider for your library © 2002 by CRC Press LLC A Guide to Corrosion Resistance Climax Molybdenum Company One Greenwich Plaza Greenwich, CT 06830 Air Pollution Control- Traditional ... moving devices (such as fans), air pollution control hardware, psychometrics, and related air/ gas properties © 2002 by CRC Press LLC McIllvaine Scrubber Manual Actually, this is a comprehensive...

Ngày tải lên: 11/08/2014, 09:21

... AIR POLLUTION CONTROL EQUIPMENT CALCULATIONS AIR POLLUTION CONTROL EQUIPMENT CALCULATIONS Louis Theodore An Introduction by Humberto Bravo Alvarez Copyright # 2008 by John Wiley & Sons, Inc ... of air pollution control system to wastewater and land pollution Contribution of air pollution control system to plant noise level Engineering a Contaminant characteristics [physical and chemical ... it creates undesirable side effects in meeting (limited) air pollution control objectives Air pollution control should be considered in terms of both the total technological system and ecological...

Ngày tải lên: 01/04/2014, 11:43

... surfaces A Guide to Obtaining Air Pollution Control Permits | © City of Chicago 2011 A Guide to Obtaining Air Pollution Control Permits | © City of Chicago 2011 Rahm Emanuel Mayor © City of Chicago ... © City of Chicago 2011 City of Chicago Fee Schedule for Air Pollution Control Permits, Architectural Surface Cleaning, Asbestos Abatement and Demolition Review As per City of Chicago Municipal ... regulated equipment or areas that need air pollution control permit Rock crushing facility Rock crushing facility Dust collection facility Sandblasting sites A Guide to Obtaining Air Pollution Control...

Ngày tải lên: 23/03/2014, 04:20

... generic prediction of control efficiencies and economics impossible for the broad category of VOCs and organic HAPs 65.5.1 Conventional Control Technologies Thermal oxidizers destroy organic compounds ... postcombustion NOx control technologies, selective noncatalytic reduction (SNCR) and selective catalytic reduction (SCR) Several systems have also been developed for scrubbing NOx; however, since ... Different PM Control Technologies20 Control Technology Multicyclone Wet scrubber Electrostatic precipitator Fabric filter Total Mass Emission Reduction, % Mass Emission Reduction for Particles < 0.3...

Ngày tải lên: 17/12/2013, 14:15

... Decree 984 (Pollution Control Act for Air Management) and adjudication of pollution cases are the functions of the Pollution Adjudication Board, a quasi-judicial body chaired by the DENR secretary ... Resource Accounting Project (ENRAP) 1996 Philippines ENRAP, Phase III Manila Ruzicka, I., A.L Indab, and C. M Rufo Jr 2002 Coughing up for clean air: Incentive-based approaches to controlling air pollution ... technologies at the stack level The control technology and costs described below address both ends of the combustion process—fuel quality and postcombustion controls The most effective controls use both...

Ngày tải lên: 17/02/2014, 10:20