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Powder/Bulk Solids

The Source for Dry Processing and Bulk Handling Technology

Dust Collection & Air Pollution Control Focus - August 09

July 31, 2009

Particulate Sensors
These particulate sensors protect blowers, turbines, and vacuum pumps in powder conveying, gas processing, and heat recovery applications. Rugged, sensitive, and virtually maintenance free, the sensors are designed to prevent unforeseen and costly downtime and equipment repairs with real-time protection. The sensors are used in the fly ash conveying industry to detect abrasive coal dust where traditional optical and triboelectric monitors have been unsuccessful. Additional applications include turbine protection in top gas recovery at steel plants and detecting condensates in gas processing applications. Sensor communications include 4–20 mA, Modbus, and Ethernet, while a display and alarm relay contacts provide local interface.
FilterSense, 978-927-4304 Beverly, MA www.filtersense.com

Hopper Separators
Offering a wide range of capacity and discharge options, CFM hopper separators can be combined with the CFM line of CV blower units to fulfill any central vacuum system need. They can be equipped with self-cleaning cartridge filtration for large or heavier particles. Each unit has three options for disposal of the collected debris to fit virtually any industrial process. Units can be equipped with a variety of discharge valves and operation controls. An example is an electropneumatic reverse-purge filter-cleaning system to add efficiency and value to central vacuum applications.
Nilfisk CFM, Malvern, PA 800-645-3475 www.nilfiskcfm.com

Bag Dump Stations
These bag dump stations are compact, self-contained units built to eliminate the labor, waste, and potential health hazards associated with the spillage and dust normally caused when bagged materials are introduced into processing systems. They are constructed of Type 304 stainless steel with welded interior and exterior. Each station consists of a large collection hopper topped by a bar grate and hinged door, an integral pulse-jet filtration unit equipped with polyester cartridge filters, and a 2-hp, 865-cfm fan. When the hopper door is opened, the fan automatically starts to ensure that any dust is drawn through the filter. The sloped sides of the hopper angle toward the hopper’s discharge port, which can be joined to gravity-fed spouting or to an airlock and pneumatic line.
Airlanco, Falls City, NE 800-500-9777 www.airlanco.com

Cyclone Dust Collectors
These cyclone dust collectors are available in three basic models to allow for the selection of the right size cyclone for each application. The cyclones are custom engineered to meet specific applications. Standard features include: coned tops for rain runoff; fabricated from carbon steel, aluminum, stainless steel, and abrasion-resistant plate; stitch-welded interior; and a 12-in. inspection door above material discharge. 
Imperial Systems Inc., Jackson Center, PA 800-918-3013 www.isystemsweb.com

Baghouse Dust Collector
Coupled with Dura-Life “Twice the Life” filter bags, the LP baghouse dust collector is a high-efficiency reverse air collector. The main advantage of the unit is its cleaning arm, which is manufactured with a flow-stop plate that keeps air from flowing through the filter bags. This minimizes dust reentrainment on the clean bags. Other benefits include: integrated helix in hopper reduces dust holding on filter bags; single inlet, outlet, and hopper reduces ducting and hopper outlet costs; requires no compressed air; and optional live-bottom hopper grinds dusts to prevent bridging in the hopper.
Donaldson Torit – Donaldson Company, Inc., Minneapolis, MN 800-365-1331 www.donaldsontorit.com

Closed-Cycle Dust Recovery System
Available on a full line of bulk bag dischargers, this closed-cycle material dust recovery system controls, collects, and reintroduces migrant material dust back into process operations. This reduces material waste and protects personnel and equipment from potentially harmful airborne contaminants. The process begins by enclosing the spouted bulk bag and feed tube within a sealed containment cylinder. When material discharge begins, migrant material dust is trapped within the containment cylinder and kept from spreading throughout the work area. The trapped material dust is extracted from the containment cylinder using a self-contained, point source dust collection and filtration unit. The collection unit’s variable frequency motor/blower draws material from the cylinder at volumes up to 300 cfm. The high-efficiency filtration stage recovers material particulate as small as 1 µm at a MERV11-rated efficiency. At the completion of the closed-cycle material dust recovery process, a high-pressure blast of air pulses the filter to remove the material dust and reintroduce the recovered material back into the process operation.
National Bulk Equipment Inc., Holland, MI 616-399-2220 www.nbe-inc.com

Sealed Bag Dump Station
This fully self-contained bag dump station virtually eliminates employee exposure to dusty bagged materials being introduced into your process. It comes with view-port, fully enclosed gloved access, along with a dust collection system that keeps product confined within the process; no external air source is required. In addition, a pneumatically powered attached bag compactor provides a high degree of containment and control in the disposing of hazardous material bags. Sealed control systems are also available for applications where periodic washdowns are required.
Hapman, Kalamazoo, MI 800-427-6260 www.ideasthatmove.com

Circular Tank Dust Collectors
CT series dust collectors are especially effective for dust problems in drying, grinding, and conveying systems. They are designed to operate in process systems environments with minimum maintenance. Basic units are designed for two levels of pressure capability: 40 to 100 in. w.g. or 17 in.Hg (pressure or vacuum). Individual units handle from 50 to 50,000 cfm. Multiple collector systems can be supplied to handle any desired gas volume. CT collectors can also be furnished for high-pressure (over 15 psig) or for extremely low-vacuum requirements.
Flex-Kleen, Glendale Heights, IL 800-621-0734 www.flex-kleen.com

Filter Bags
This company uses scrim-supported felt to improve the quality and life of filter bags. Not only does scrim add strength to the fabric for greater durability, but it also provides increased support and static conductivity. Bags made from fabric with supporting scrim can better withstand abrasive dust and frequent cleaning, thereby extending bag life. Scrim-supported felts are available in a variety of weights and finishes to address specific dust types.
American Fabric Filter Co., Wesley Chapel, FL 800-367-3591 www.americanfabricfilter.com

Wet Particulate Dust Collector
The Hydro-Lance wet particulate dust collector with SAVe technology avoids operational issues associated with standard venturi scrubber systems including pump failures, small-orifice nozzle clogging, material failures, and general maintenance headaches, while still providing the time-proven venturi collection methodology. The system saves capital cost, replacement costs, energy, maintenance, floor space, and water. Key features include: more than 99% removal guaranteed; thermoplastic, steel, or other materials of construction; automatic sludge removal; removable venturi throat; and integral exhaust fan.
Duall Div., Met-Pro Corp., Owosso, MI 989-725-8184 www.dualldiv.com

Reverse Pulse-Jet Baghouses
The scientific design of the cleaning nozzle is the key to the performance of nozzle-based cleaning systems for reverse pulse-jet collectors. This patented technology eliminates the venturi at the top of the bag and provides more induced cleaning air into the filter media than any other system available. A 56% improvement in bag cleaning is achieved versus venturi-based cleaning systems. This technology cleans the entire bag.
Scientific Dust Collectors, Alsip, IL 708-597-7090 www.scientificdustcollectors.com

Sanitary Bag Dump
This sanitary bag dump station for pneumatic conveying systems collects dust created during manual dumping of bulk materials from bags, boxes, drums, and other containers, and allows rapid, tool-free washdown. Optional rocker arms support the hood assembly above the hopper rim, thereby eliminating the need for operators to lift and remove the hood during cleaning and inspection. A stainless rotary airlock valve with integral support rails allows the rotor assembly to separate from the valve body for sanitizing of material contact surfaces, also without tools. A high-velocity vacuum fan draws airborne dust from the operator’s atmosphere onto two cartridge filters. Automatic reverse-pulse filter cleaning allows continuous, efficient operation. Timed blasts of compressed plant air inside the cartridge filters causes dust buildup on outer filter surfaces to fall into the hopper.
Flexicon Corp., Bethlehem, PA 888-353-9426 www.flexicon.com

One-Piece Molded Bottom Pleated Bag
This molded design creates a stronger, more complete interlocking adhesive seal for the Pleat+Plus product line. The molded design provides longer pleated bag life that is resistant to the corrosive baghouse gas flow and withstands operating temperatures up to 375°F. The new design can be manufactured to meet the food-grade Title 21 CFR 177 compliance criteria and other unique industry standard requirements.
Midwesco Filter Resources Inc., Winchester, VA 800-336-7300 www.midwescofilter.com

Vertical Cartridge Collector
The Model UVC Ultra-Flo vertical cartridge dust collector has been designed to handle a variety of in-plant air quality problems. Its compact size allows for installation in tight areas, while the modular design allows for multiple arrangements to handle airflows from 500 to 25,000 cfm. The vertical orientation of the cartridges requires less cleaning effort because the dust falls directly into a collection hopper without depositing back onto itself, which can occur with horizontal cartridges. The optional high inlet on the UVC reduces velocity, allowing for more-efficient operation at lower differential pressures.
Ultra Industries Inc., Racine, WI 262-633-5070 www.ultradustcollectors.com

Extraction Arm
The NEX D is designed for working environments producing large quantities of dust and it is available in an EX-approved model for any explosion-risk environment. The arm incorporates an enclosed support structure that simplifies cleaning and prevents dust from penetrating the mechanical friction hinges. The grounded air duct minimizes dust collecting on the inside of the hose. The concealed joints and a simple removable air duct make it easy to maintain.
Nederman Inc., Westland, MI 734-729-3344 www.nederman.com

Downdraft Series Dust Collector
With the Modu-Kleen downdraft dust collector, the air enters at the top of the dust collector housing and flows downward to the cartridge filters, thereby improving the filtering process and the material-to-air ratio. Air velocities are lower than those with a conventional dust collector, reducing the load on each filter cartridge and extending filter life. Cartridge filters are positioned horizontally, requiring less floor space and making filter removal easier. Personnel never have to enter the filter housing for general maintenance or for cartridge filter removal. This provides a safe and quick method of filter removal. For fast and easy inspections, a large, quick-opening door allows maintenance personnel to closely inspect each cartridge when required. In addition, any single cartridge can be removed without disturbing adjacent cartridges. Also, each cartridge filter has a unique built-in quarter-turn bayonet mount, so no tools of any kind are required for cartridge removal.
Dynamic Air Inc., St. Paul, MN 651-484-2900 www.dynamicair.com

Cyclonic Preseparator for Vacuums
The Dust Deputy converts an ordinary shop vacuum into a high-efficiency cyclone vacuum. It separates more than 99% of all dust and material before the vacuum barrel, thereby solving filter clogs and maintenance problems. Material separation is easy to see in the clear cyclone, with nearly all waste going into the container under the cyclone, not into the shop vacuum. The unit is ideal for separating carbon and many other fine dusts that would quickly clog a vacuum filter. It can be mounted directly on or used with any standard shop vacuum.
Oneida Air Systems, Syracuse, NY 800-732-4065 www.oneida-air.com

Wet Scrubber
The ACO wet scrubber efficiently collects dust, odor and bad smells, and gas and vapor by mixing liquid with gas containing dust. Gas containing dust is introduced to the narrow pass between the guide plate and liquid surface and passes through quickly with much liquid, disperses it, and creates a vortex at the scrubbing part. Features include: simple construction; easy maintenance with no moving parts; no pump required because the gas can disperse liquid; and low running cost because of low pressure drop.
AAAmachine Inc., Arlington Heights, IL 800-996-0070 www.aaamachine.com

Telescopic Dust Spout
The Dust Devil minimizes dust when discharging free-flowing materials. Its tough and simple design reduces dust inside a facility, helping to keep equipment and environment cleaner. Available diameters include 12, 14, and 18 in. An electric model with remote-mounted controls and a manual model with hand winch are available. The unit can be installed on the end of a conveyor or existing spout in about an hour. Its design uses flexible polyethylene spouts that will last for years. It can be used with virtually all free-flowing materials, including chemicals, grain, fertilizer, salt, sugar, pesticides, saw dust, cement, and sand.
Waconia Manufacturing, Waconia, MN 952-442-4450 www.waconiamfg.com

Modular Tubing System
This modular tubing system is available with diameters from 3 to 12 in. for off-the-shelf delivery, with diameters larger than 12 in. available on custom orders. It is constructed from stainless steel, mild steel, and galvanized steel. The Quick Connect clamping ring is rated 45 psi shock explosionproof and is airtight for up to 15 psi positive pressure and 25 in.Hg vacuum.
Jacob Tubing, Memphis, TN 901-566-1110 www.jacob-tubing.com

Enhanced Vent Filter
It is now easier to lift the lid of the redesigned Gal Vent filter. Standard features include: top-loading cartridges, allowing for easy removal and replacement of cartridges; galvanized construction; exterior spray-painted industrial gloss white; Lift Assist for the lid also holds it closed when the lid is down; jet-air-pulse media cleaning (attaches to clean air supply); filter cartridges with 45 pleats and 22.5 sq ft of filter media; differential pressure gauge to monitor filter-cleaning system performance; and a three-year warranty.
O.A. Newton/TKC Technologies, Bridgeville, DE 302-337-3778 www.oanewton.com