... ventilate their meat processing devices (cookers, etc.) into biofilters for odor control More intense odors are controlled using packed towers, tray towers, fluidized bed scrubbers, and varieties ... Figure 3.1 Biofilter (Monsanto Enviro-Chem Systems, Inc.) Biofilters have also been used to control the emissions of propane and hexane from the filling of aerosol cans These systems can actually ... compounds that are toxic to the bacteria, where the gas stream temperature and humidity can be controlled within a range suitable for sustaining the bacteria colonies, and where the concentration...
... 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 from the silicon control ... 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 ... filtered air into the insulator compartments or penthouse An electric heater element or sometimes steam coil heats air that has been drawn through a filter by a blower The conditioned air is then...
... it a good airpollutioncontrol device This high pressure air is typically directed through a Venturi, to increase air volume, raises the air pressure inside the filter over the process air flowing ... reverse air cleaning principle is to use an extra air mover for cleaning filters This extra air mover produces a higher pressure than the air flowing through the collector; hence, a flow of air through ... reverse air collector is built in numerous configurations It is a moderate energy device Generally it uses a caged needled fabric tubular media making it a pretty good choice for airpollution control...
... diffusion, however, is primarily found in use in fiberbed collectors As air containing particulate flows through a filter, the air flows around any obstacle (such as a filter fiber) that is in its path ... as a result follow the air as it winds its way through a filter These particles have substantial random motion, called Brownian diffusion, due to collisions with nearby air molecules This almost ... processes, especially on fabric and vinyl, create visible emissions that fiberbed filters can effectively control The emissions are typically generated during the drying and curing phase of the operation,...
... neutralization system Sprayed with a suitable biocide, these type devices can also trap and control airborne bacteria and spores They are therefore often used for laboratory hood applications ... scrubber with sonimist chamber (Misonix Incorporated) These types of collectors have also been used to control dopant gases used in the manufacture of semiconductor materials These gas flows are typically...
... mesh pads, chevrons, or packed sections for droplet control In the curved grid scrubber, which operates at a higher vessel velocity, droplet control is most often by chevron; therefore, these ... and the gas has no preferred or directed path These designs were sold under license by ChemPro (Fairfield, NJ), the Otto H York Company (Parsippany, NJ), and others It became evident on some of ... ft/sec Gas outlet velocities are the same as the inlet if the cleaned gases proceed to downstream equipment (such as a fan) If a stack is mounted on top of the scrubber, gas velocities of 35 to...
... characteristics, and the scrubbing liquid’s capacity for that contaminant control the actual amount of packing needed in a packed tower Packing selection is covered in detail in books specifically devoted to ... 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 the height of ... by the equilibrium conditions between the contaminant gas and the absorbing liquid The overall controlling mechanisms are ruled by the solubility of the gas in the liquid and by any reactions...
... this separation A small portion of the spray goes overhead with the gas This droplet dispersion is controlled using chevron type droplet eliminator(s) in the case of a gas stream containing particulate, ... application where a utility FGD spray tower is installed after a dry precipitator used for particulate control With the preformed spray scrubber, the spray nozzles are generally installed in the gas ... ft/sec are common For FGD systems, the pH (and sometimes, density) of the scrubbing solution is controlled to operate within a window bounded by efficiency and scaling For limestone slurry scrubbing,...
... used for the control of non-condensable gases from a paper pulp mill The unit consists of a specially designed burner, burner controls, insulated combustion chamber, and temperature controls Figure ... 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 ... need a combustion air blower A waste heat recovery boiler may be added, in which case the furnace is horizontal and a combustion air blower is added Pharmaceutical plants generate air- rich or nitrogen-rich...
... compact size makes them attractive for roof mounting if space is a problem As seen in Figure 18.4, a pair of vane type scrubbers are seen roof mounted with the exhaust stacks mounted directly on top ... stream contains over 20% submicron particulate, vane type scrubbers may not be able to meet current air emissions regulations The scrubber vendor should be able to predict the scrubber performance...
... AIRPOLLUTIONCONTROLEQUIPMENT CALCULATIONS AIRPOLLUTIONCONTROLEQUIPMENT CALCULATIONS Louis Theodore An Introduction by Humberto ... and upgrading the effectiveness of airpollutioncontrol practices At the heart of the control strategy process is the selection of the best airpollutioncontrol measures from among those available ... sources within any control jurisdiction Control technology is self-defeating if it creates undesirable side effects in meeting (limited) airpollutioncontrol objectives Airpollutioncontrol should...
... Industrial Control Wiring GuideSecondedition Bob Mercer OXFORD AUCKLAND BOSTON JOHANNESBURG MELBOURNE NEW DELHI Newnes ... safety and operational efficiency of equipment BS EN 60204 also provides guidelines specific to the electrical controls for machinery ᭹ Part 6: Multiple function equipment such as that used for automatic ... SAFETY 1.2 Building safe equipment 1.2.2 Standards A standard is a document specifying nationally or internationally agreed properties for manufactured goods and equipment The second aspect of safety...
... Industrial Control Wiring GuideSecondedition Bob Mercer OXFORD AUCKLAND BOSTON JOHANNESBURG MELBOURNE NEW DELHI Newnes ... safety and operational efficiency of equipment BS EN 60204 also provides guidelines specific to the electrical controls for machinery ᭹ Part 6: Multiple function equipment such as that used for automatic ... SAFETY 1.2 Building safe equipment 1.2.2 Standards A standard is a document specifying nationally or internationally agreed properties for manufactured goods and equipment The second aspect of safety...