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 Mens Stainless Steel Bracelet Three Row Cable Link $27.00 Time Remaining: 29d 11h 8m Buy It Now for only: $27.00 |
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 b508 NEW Black Stainless Steel 2 Row Greek Key Bracelet $6.99 Time Remaining: 27d 23h 10m Buy It Now for only: $6.99 |
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 14K YELLOW SIMULATED DIAMOND 1 ROW MENS STAINLESS STEEL NECKLACE TENNIS CHAIN $159.99 Time Remaining: 28d 5h 3m Buy It Now for only: $159.99 |
 Unisex Stainless Steel A Row Black Braided Leather Shiny Skull Cuff Bracelet 85 $24.69 Time Remaining: 4d 16h 29m Buy It Now for only: $24.69 |
 New Stainless Steel Tennis 1 Row Lab Simulated Diamond Clear Necklace Chain 36in $159.99 Time Remaining: 26d 5h 19m Buy It Now for only: $159.99 |
 TT S Steel Four Row Band Ring With CZ Size 10 R18 $7.88 Time Remaining: 1d 1h 58m |
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 Mens Stainless Steel Band Ring sz 10 Shiny 2 Row Ball Design 8mm Wide $14.95 Time Remaining: 27d 6h 10m Buy It Now for only: $14.95 |
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 Authentic MOVADO 4 Row IP Stainless Steel Cuff Bracelet w original Pouch 225 $150.00 Time Remaining: 25d 8h 5m Buy It Now for only: $150.00 |
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 Polished Three Row Stainless Steel Ring Sz 8 13 $17.43 Time Remaining: 20d 4h 17m Buy It Now for only: $17.43 |
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 Mens Stainless Steel Rubber 2 Row Bracelet Bangle 063 FASHION $4.19 Time Remaining: 16d 7h 31m Buy It Now for only: $4.19 |
 Stainless Steel White Dual Row Ceramic Interlocking Link Ring Size 7 13 $14.99 Time Remaining: 8d 13h 5m Buy It Now for only: $14.99 |
 TT 316L Stainless Steel Three Row Hoop Earrings EP07 $9.99 Time Remaining: 16h 14m |
 b464 Doule Row Greek Key Black Stainless Steel Bracelet $6.99 Time Remaining: 3d 8h 48m Buy It Now for only: $6.99 |
 Mens Stainless Steel Rubber 2 Row Bracelet Bangle 063 FASHION $1.00 Time Remaining: 6d 10h 10m Buy It Now for only: $1.00 |
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 b464 Doule Row Greek Key Black Stainless Steel Bracelet $0.99 Time Remaining: 12h 1m |
 MENS 5 ROW 24 MM BEZEL STAINLESS DIAMOND BRACELET 2CT $529.99 Time Remaining: 12d 10h 2m Buy It Now for only: $529.99 |
 5 Row 316L Stainless Steel Cable ID Bracelet $24.00 Time Remaining: 5d 4h 14m Buy It Now for only: $24.00 |
 STAINLESS STEEL ROW BLACK DIAMOND 015 CTTW DOG TAG WITH FREE 24 CHAIN $54.60 Time Remaining: 16d 15h 37m Buy It Now for only: $54.60 |
 SKULL ROW 316L STAINLESS STEEL ROCK BIKER RING Sz 9 NEW $19.99 Time Remaining: 21d 22h 7m Buy It Now for only: $19.99 |
 UNIQUE TT Stainless Steel Four Row Band Ring R02 $15.99 Time Remaining: 8d 16h 35m Buy It Now for only: $15.99 |
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 316L Stainless Steel 3 Row Design Cross Pendant $18.00 Time Remaining: 5d 4h 15m Buy It Now for only: $18.00 |
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 SKULL ROW 316L STAINLESS STEEL ROCK BIKER RING Sz 115 $19.99 Time Remaining: 21d 22h 9m Buy It Now for only: $19.99 |
 b555 Double Greek Key Row Stainless Steel Bracelet MEN $0.99 Time Remaining: 13h 19m |
 8mm 3 Row Stainless Steel Ring w Brick Design $15.00 Time Remaining: 5d 4h 16m Buy It Now for only: $15.00 |
 Stainless Steel 2 Row Rubber ID Plate Punk Cuff Bracelet Bangle Mens Jewelry $4.95 Time Remaining: 24d 5h 54m Buy It Now for only: $4.95 |
 MENS STAINLESS STEEL RUBBER 2 ROW BAND WEDDING RING $11.99 Time Remaining: 24d 2h 54m Buy It Now for only: $11.99 |
 STAINLESS STEEL DAD RING BLACK ROW DESIGN BAND WITH 001 DIAMOND SIZE 13 $16.80 Time Remaining: 21d 13h 29m Buy It Now for only: $16.80 |
 BRAND NEW MENS 1 ROW CZ STAINLESS STEEL LAB CZ CHAIN NECKLACE $159.99 Time Remaining: 22d 7h 48m Buy It Now for only: $159.99 |
 b464 Doule Row Greek Key Black Stainless Steel Bracelet $0.99 Time Remaining: 23h 23m |
 Stainless Steel Men Rows Grooves Flat Band Ring 026 $2.99 Time Remaining: 25d 1m Buy It Now for only: $2.99 |
 STAINLESS STEEL DAD RING BLACK ROW DESIGN BAND WITH 001 DIAMOND SIZE 9 $16.80 Time Remaining: 21d 13h 26m Buy It Now for only: $16.80 |
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 MENS STAINLESS STEEL RUBBER 3 ROW BAND WEDDING RING $11.99 Time Remaining: 24d 2h 52m Buy It Now for only: $11.99 |
 Two Tone Gold Stainless Steel ID Bracelet with row of black CZ SSB10161 $19.99 Time Remaining: 28d 5h 55m Buy It Now for only: $19.99 |
 New Stainless Steel 1Row Lab Diamond Black White 6mm Stone Necklace Chain Deal $159.99 Time Remaining: 22d 7h 24m Buy It Now for only: $159.99 |
 2 Cha Cha Braclet 2 Stainless Darice 7 Inch Triple Row Stretch DIY Beadalon $0.99 Time Remaining: 3d 2h 6m Buy It Now for only: $5.95 |
 Mens Stainless Steel Necklace Three Row Cross Pendant $16.80 Time Remaining: 13d 14h 32m Buy It Now for only: $16.80 |
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 SKULL ROW 316L STAINLESS STEEL ROCK BIKER RING Sz 10 $19.99 Time Remaining: 21d 22h 8m Buy It Now for only: $19.99 |
 316L Stainless steel 3 row design cross pendant $13.94 Time Remaining: 3d 13h 35m Buy It Now for only: $13.94 |
 STAINLESS STEEL6 ROW CUFF LINKS $29.99 Time Remaining: 10d 7h 57m Buy It Now for only: $29.99 |
 TT 14K Gold GP Stainless Steel Three Row Hoop Earrings EG17 $9.99 Time Remaining: 1d 6h 34m |
 875 Mens 316L Stainless Steel 3 Row Link Bracelet $22.31 Time Remaining: 3d 12h 38m Buy It Now for only: $22.31 |
 STAINLESS STEEL DAD RING BLACK ROW DESIGN BAND WITH 001 DIAMOND SIZE 125 $16.80 Time Remaining: 21d 13h 28m Buy It Now for only: $16.80 |
 STAINLESS STEEL DAD RING BLACK ROW DESIGN BAND WITH 001 DIAMOND SIZE 10 $16.80 Time Remaining: 21d 13h 26m Buy It Now for only: $16.80 |
 Mens Stainless Steel Rubber 2 Row Bracelet Bangle 063 FASHION $1.00 Time Remaining: 11d 1h 12m Buy It Now for only: $1.00 |
 STAINLESS STEEL DAD RING BLACK ROW DESIGN BAND WITH 001 DIAMOND SIZE 105 $16.80 Time Remaining: 21d 13h 27m Buy It Now for only: $16.80 |
 TT Stainless Steel Three Row Hoop Earrings BLUE EL06 $9.99 Time Remaining: 2d 13h 6m |
 Mens Stainless Steel 2 Row CZ 316L Black Iced Out Bracelet Hiphop Bling $99.99 Time Remaining: 19d 7h 31m Buy It Now for only: $99.99 |
 Stainless Steel Men Multi Row Ribbed Band Ring 016 $2.99 Time Remaining: 22d 1h 51m Buy It Now for only: $2.99 |
 Mens Black Leather Two Row Stainless Steel and Orange Rubber 850 Inch Bracelet $49.00 Time Remaining: 5d 7h 59m Buy It Now for only: $49.00 |
 STAINLESS STEEL DAD RING BLACK ROW DESIGN BAND WITH 001 DIAMOND SIZE 85 $16.80 Time Remaining: 21d 13h 25m Buy It Now for only: $16.80 |
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 MENS STAINLESS STEEL RUBBER 3 ROW BAND WEDDING RING SIZE 8910111213 $11.99 Time Remaining: 5d 9h 44m |
 Three Row 316L Stainless Steel 3MM CZ Accents Bracelet Free USA Shipping $35.99 Time Remaining: 23d 6h 17m Buy It Now for only: $35.99 |
 Stainless Steel 8mm Three Row Band Ring Sizes 8 13 $17.99 Time Remaining: 24d 2h 18m Buy It Now for only: $17.99 |
 STAINLESS STEEL DAD RING BLACK ROW DESIGN BAND WITH 001 DIAMOND SIZE 11 $16.80 Time Remaining: 21d 13h 27m Buy It Now for only: $16.80 |
 Stainless Steel 2 Row Wristband Chain Cool Punk Bracelet Bangle Mens Jewelry $4.75 Time Remaining: 24d 6h 4m Buy It Now for only: $4.75 |
 8mm 316L Stainless Steel Ring w Double Row of Beads $15.00 Time Remaining: 5d 4h 16m Buy It Now for only: $15.00 |
| Account limit of 2197 requests per hour exceeded. |
Air Purification With Pulse-jet Dust Collectors
Oleg Systems Co. designs industrial dust collection systems including dry type dust collectors. Dust collection equipment utilizing the principle of wet dust collecting is available in numerous designs utilizing a number of principles and featuring wide variation in effectiveness, initial cost, operating and maintenance expense, space, arrangements and material of construction. Dust collectors are used extensively in industry for a wide range of applications. They require more space than most other types of air cleaning devices, necessiating outdoor installation in most cases.
One of the most popular and efficient dry type dust collector designs is Pulse-Jet Dust Collector.
In a pulse-jet dust collector, dust is collected on the outer surface of the filter bag. To remove these accumulated dust, a pulse of compressed air is sent down the inside of the bag to flex the bag surface outward, dislodging the dust. Dust falls of the bag for removal from the dust collector. This pulse of air is automatically triggered by a timer or a pressure differential signal monitored accross the filter media, allowing self-cleaning and unattended operation. Dust-laden air enters the dust collector through an inlet and comes into the dusty air plenum that contains filter elements. An inlet baffle deflects some of the larger particles in the airstream downwards for immediate removal, thus reducing filter bag wear by removing the larger abrasive particles before they accumulate on the bag.
The pulse-jet dust collector also has a header commected to the plant compressed air (100 PSI pressure) and acts as a reservoir. At predetermined intervals, a solenoid valve releases a blast of compressed air down the air pipe to the set of filter bags. The pulse of compressed air produces a shock wave along the lenght of the bag. A converging venturi aspirates filtered air into the bag from the clean air plenum to assist in the bags cleaning, thereby minimizing plant air consumption. The timer sequences the cleaning cycle, row-by-row, until all the bags are clean. The cycle is then repeated.
The cleaning cycle is also initiated by monitoring differential pressure across the tube sheet that separates the plenums. As the dust accumulates on the surface of the filter, the differential pressure across the media increases. At a certain value, the solenoid is triggered and cleaning happens. Triggering the cleaning cycle at a predetrmined differential pressure setting eliminates cleaning during periods of light dust load, increases bag life, and reduces the use of compressed air.
Filter material is selected based on the operating temperatures, type and size of duct particles, dust collector capacity. At ambient temperature, majority of pulse-cleaning collectors use 10 to 14-oz polyester felt media. Synthetic materials have better temperature resistance than natural materials. At elevated temperatures up to 500 F, fiberglass bags can be used. Nomex is well suited to the 250 to 400 F range. Surface finish of the bag enhances release of sticky dusts. Applying a silicon finish layer to the bag is commonly used. Special coatings provide a membrane with tiny perforations that achieve very high filtration efficiencies. Pleated filter elements allow for more surface area and are often retrofitted into the system.
For additional information please refer to http://olegsystems.com/airknife/Index.html.
Oleg Chetchel
Process Engineer and Designer
Oleg Systems Co.
http://olegsystems.com/industrialventilation/Index.html
http://olegsystems.com/contact/Index.html
About the Author
Oleg Chetchel
Ventilation Equipment Designer
Tenderall Fan Co.
http://tenderall.com
