Venturi Scrubbers for Air Cleaning Posted By : O. Tchetchel

Tag : cleaning equipment
Venturi Scrubbers For Air Cleaning
Canadian Air Systems Co. is an engineer of industrial dustcollection systems including air scrubber wet collectors. Dustcollection equipment utilizing the principle of wet dust collectingis available in numerous designs utilizing a number of principlesand featuring wide variation in effectiveness, initial cost,operating and maintenance expense, space, arrangements and materialof construction.

Wet collectors (particularly the high energy - high efficiencytypes) are being used more frequently as the solution of airpollution problems. It should be realized that disposal ofcollected material in water without clarification or treatment maycreate wter pollution problems. Wet collectors have one distinctcharacteristic not found in other collectors - their inherentability to humidity. Humidification, the process of adding watervapor to the air stream through evaporation, may be eitheradvantageous or disadvantageous depending on the situation. Wherethe initial air stream is at an elevated temperature and notsaturated, the process of evaporation reduces the temperature andthe volume of the gas stream leaving the collector. Asuming the fanis to be selected for operation behind or on the clean air side ofthe collector it may be smaller and will definitely require lesspower than if there had been no cooling through the collector. Thisos one of the obvious advantges of humidification.


Wet dust collectors have the ability to handle high temperature andmoisture-laden gases. The collection of dust in wetted formeliminates a secondary dust problem in disposal of collectedmaterial. Also, some dust represent explosion or fire hazard whendry and wet collectors eliminate or at least reduce the hazzard.However, the use of water may introduce corrosive conditions withinthe collector and freeze protection may be necessary if wet dustcollectors are located in cold climates. Space requirements arenominal; pressure losses and collection efficiency vary widely withthe design.

In one of the most popular Canadian Air Systems Venturi Scrubber acontaminant air stream entering the scrubber inlet is immediatelydrawn into the venturi section, where molecular impingement occurs.A scrubbing liquid spraye directly into the venturi sectionimpinges upon the gaseous contaminant. This scrubbing liquidusually contains a chemical dosing agent to neutralize and dissolvecontaminant particles. The air stream is accelerated significantlywithin the venturi section with velocities ranging from 4,000 fpmto 10,000 fpm depending on the removal efficiency objectives.

Venturi Air Scrubber can provide low maintenance particleelimination solutions to meet the toughest challenges. Standardventuri scrubber design incorporates knock-down baffles, locateddirectly behind the venturi section, which significantly eliminatesliquid entrainment from the air stream. This prevents overloadin inthe scrubber's mist elimination section by reducing clogging.

Canadian Air Systems can supply customized air scrubbing solutionincluding fully programmed control panel for stand alone automaticoperation or an air scrubber ready for integration with existingprocess designs. Customized devices for piping and chemical dosingsystems, integral sums and pumps, vanes wash-down units andoptionals stainless steel or solid fiberglass exhaust fans areavailable too.

CB Venturi Air Scrubber ensures:

* reduced installation cost
* low maintenance cost
* longer operating life
* high quality industrial design in a compact integrated unit
* 99 % removal efficiency
* corrosion resistant construction
By: O. Tchetchel
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For additional information please refer to nis-co.com/scrubber/Index.html. Oleg Tchetchel Designer of Industrial Process Air Moving SystemsCanadian Air Systems www.nis-co.com/contact/Index.html nis-co.com/scrubber/Index.html
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