Exhaust Collector

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Exhaust Collector
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Always use your imagination and be creative when building these kids crafts or any others. It's your creation, so be inventive when looking for building supplies - you just may be surprised! When building your project, experiment with new and different ways of putting it together. The most important thing is to have fun!

* 1 Paper towel tube

* Cereal box or some cardboard

* Regular masking tape

* Blue tape (to customize it)

* 6 bendy straws

* 1 small paper cup

1. Cutting the wings!

Start out by cutting out your front wings, tail wing, and tail from a piece of cereal box or cardboard. This is a Biplane, so you are going to need two main wings. I played around with their size and shape by drawing them out onto my scrap cardboard before I cut them out. You could get real creative at this point and make your Biplane wings look like bird wings or dragon wings!

2. Cut out your supports!

Because it is a Biplane. you are going to want to add some kind of support structure between the two front main wings that will keep them apart but attached to each other at the same time.

WING STRUTS.

I simply cut out four rectangles that were all the same size, about 1.5 inches by 3.5 inches in size. I then trimmed the sides a bit to make them look cool.

3. Collect your propeller and motor assembly parts!

To make my propeller and motor assembly, I punched six holes on the side, near the bottom of my paper cup. I also carefully made a small hole in the center of the bottom of my cup that was slightly bigger than a straw.

4. Insert your straws!

Now simply insert your bendy straws into the holes on the side and trim them as you like. These are the exhaust pipes for your motor. You may need to tape them in place if they don't hold firm on their own. If you're going to color or cover all of your pieces in tape to customize your Biplane, you should do that part first.

5. Make your propeller shaft!

For my propeller shaft, I took a small piece of leftover straw, wrapped some tape around one end, and inserted it up through the hole on the bottom of my cup. I then added a little tape to hold it in place.

6. Add your propeller!

My propeller was cut out of an old cereal box. I drew out a design that I liked, cut it out and punched a hole in the center of it. Make sure your hole is bigger than your straw propeller shaft. Now drop your propeller on and see if it spins!

7. Connect your motor!

All that's left is to wrap some tape around the straw that makes up your propeller shaft. Make sure to add the tape away from the propeller a little bit so that it can spin. Now plop it on the front of your Biplane and, well, it looks like a propeller and motor assembly to me!

8. Cover the parts with tape!

At this point, you could tape all of your parts together and start playing with your Biplane! What I did was to cover all of my parts with tape before I assembled my Biplane. I added blue masking tape on the engine assembly and wing struts, along with a strip on the wing flap ends. Looks pretty cool!

9. Tape the fuselage onto the main wing!

Next I taped the fuselage or main body onto my bottom wing. I then carefully taped all four wing struts in place. I played around a little with their location, and liked the look of two struts sandwiched next to the fuselage, and the other two placed near the ends of the wings. I also installed my motor assembly at this point and decided to add a cockpit hole onto the fuselage. I penciled it in first, making it the size and shape I liked, cut it out, and finally added a little blue tape around the hole to make it look nice.

10. Connect your tail!

For the tail section, you will want to first tape your tail to the tail wing.

Then carefully mark and cut three slots out for your tail assembly to slide into on the fuselage of your Biplane. I was very careful with cutting the top slit so that my tail would stick up vertically through it, and that the slots I cut were not so big that my assembly would slide around once I inserted them. Your tail assembly should fit inside your slots nice and snug.

11. Add details!

I added a few more details, such as some decals that I made by drawing a circle onto some masking tape. I then colored a "#1" onto it and accented it with red and yellow markers, and finally cut them out and taped them onto the tail and top wing. I also added some wheels onto my Biplane. Maybe you could add some pontoons for landing on water instead. If you'd like to see how to make pontoons, check out this project!

12. Have fun!

As with most projects I build, there is never really a "finished" point. I could keep adding and adding smaller details to it, and so can you! At some point I stand back, look at it and say "COOL! It's done!" Other times, I'll come back and look at it, and think of something else to do to it. No matter the case, always remember to have fun, experiment, and try to use different materials and ways of putting it together!

You can also see specific photo and video step-by-step instructions for these Big Biplane Kids Crafts. When you are done making this craft or science project, try making many of the other kids crafts you can find at LooLeDo.com.

Mark Icanberry is the author of multiple successful kids crafts books.

Copyright 2009 LooLeDo.com

Selection of Dust Collectors for Air Cleaning

Canadian Air Systems Co. is a engineering company for industrial dust collecting systems. Dust collecting equipment 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.

Factors influencing dust collection equipment selection include:

* Concentration and particle size of contaminant;
* Degree of collection required;
* Characteristics of air or gas stream;
* Characteristics of contaminant;
* Methods of disposal.

Depenging on above factors, the following Canadian Air Systems dust collector types can be utilized:

ELECTROSTATIC PRECIPIRATORS

  The principle of collection relies on the ability to impart a negative charge to particles in the gas stream causing them to move and adhere to the grounded or positively charged collector plates. Most precipitators are made for horizontal air flow with velocities 100 to 600 fpm.

- Fabric Collectors

  Fabric arresters are high efficiency, medium cost collectros. Dust collection is obtained by building up a mat of the material on the dirty side of the media. This mat provides the actual filtering or straining bed. By means of this bed a high degree of removal is obtained even on submicron size particles.

- Intermittent-Duty Fabric Collectors

  These types may use either envelope or stocking arrangement of the fabric but will generally employ shaking or vibrating as a means of reconditioning. Periodically Uusually at 4 to 6 hour intervals0 the air flow must be stopped to effect reconditioning - thus the classification "intermittent".

- Multiple-Section, Continuous-Duty, Automatic Fabric Collectors

  The disadvanteges of stopping the air flow to permit vibration and variations in the airflow can be overcomed by using of sectional arresters allowing continuous operation of the exhaust system as automatic dampers periodically take one section out of service for reconditioning the fabric while the remaining sections take the entire gas volume.

- Reverse-Jet Fabric Collectors

  The reverse-jet type differs from the conventional arrsters in its use of high pressure air to clean the fabric. One type uses high pressure air (30" - 40" WG) froma travelling "blow ring" to dislodge the collected cake from inside the fabric tube. Another type uses high pressure compressed air (100 PSI) to break the dust cake from the exterior of the fabric tube or envelope by the intermittent application of reverse-jet compressed air.

- Reverse-Flow Collapse, Continuous-Duty Collectors

  Reverse-flow collapse cleaning is generally used with glass media which is fragile and requires a gentle cleaning technique. Reversing the glass flow provides a gentle collapse of the fabric usually in a "four point star" braking the dust cake which falls by gravity into the hopper.

WET COLLECTORS

  Wet collectors are available in many different designs. They have the ability to handle high temperature and moisture-laden gases. The collection of dust in wetted form eliminates a secondary dust problem in disposal of collected material. Also, some dust represent explosion or fire hazard when dry and wet collectors eliminate or at least reduce the hazzard.

- Chamber or Spray Tower

  Consists of a round or rectangular chamber into which water is introduced via spray nozzles. There are many variations in design but the principal mechanism is impaction of dust particles on the liquid droplets created by nozzles. These droplets are separated from the air stream by centrifugal force or impingement on water eliminators.

- Packed Towers

  Collectors in this group are essentially contact beds through which gases and liquid pass either concurrently, counter=concurrently or in cross-flow and are used primarily for applications involving gas, vapor and mist removal.

- Wet Centrifugal Collectors

  Wet centrifugal dust collectros utilize centrifugal force to acceslerate the dust particle and impigne it upon a wetted collector surface. These collectors are more efficient than the chamber type. Some are availbale with different number of impingement sections.

- Wet Dynamic Precipitators

  This type uses water sprays within a fan housing and obtains precipitation of the dust particles on the wetted surface of an impeller with special fan blade shape. No internal pressure drop is involved although mechanical efficiency is somewhat lower than the mechanical efficiency of standard exhaust fans.

- Orifice Type Collectors

  In this group of wet collectors designs, the air flow through the collector is brought in contact with a sheet of water in a restricted passage. Water flow may be induced by the velocity of the air stream or maintained by pumps and weirs.

- Venturi Scrubbers

  This collector uses a venturi-shaped construction to establish throat velocities considerably higher than those experienced with the orifice type. The collection mechanism of the venturi is impaction. As with wet collectors in general, the collection efficiency of the venturi increases with higher pressure drops. Different pressure drops are achieved by designing for selected gas velocities in the throat. The venturi iteself is a gas conditioner causing intimate contact between particles in the gas and the multiple jet streams of scrubbing water.

DRY COLLECTORS

- Cyclone Dust Collectros

  Cyclone Collectors are frequently applied for the removal of coarse dusts from an air stream, as a pre-cleaner to more efficient dry or wet dust collectors and / or as a separator in product conveying systems using an air stream to transport material. Principle advantages are low cost, low maintenance and low pressure drop (in order 0.75" to 1.5" WG), but this type dust collector can not be used for collection of fine particles.
 
- High Efficiency Centrifugal Collectors

  Have been developed whereby higher centrifugal forces are exerted on dust particles in a gas stream. Improvement in dust separation efficiency has been obtained by 1) increasing velocities through a cyclone shape dust collector, 2) utilizing a skimmer or other design feature, 3) using a number of small diameter cyclones in parallel and 4) placing units in series in some unusual applications.

- Dry Type Dynamic Precipitators

  In this collector, dust is precipitated by centrifugal force on to specially shaped blades on an exhauster wheel and then conveyed through a dust circuit in the fan casing to the dust storage hopper.

- Louver Type Dust Collectors

  Centrifugal forces can be applied to a particle by a rapid change in direction of air flow by series of plates set at an angle to the air stream. Coarse particles traverse the air stream and will project back to the dirty air side by the forces that can be produced from such an impact.

- Settling Chambers

  Dust is ettled out in a large chamber when conveying velocities are reduced to the point where the particles are no longer conveyed. Extreme space requirements and the presence of edde currents to nullify the effective velocity mean that settling chamber type of dust collectors can be used only for removal of extremely coarse particles.

- Potable Unit Collectors

  To fill the need for dust collection from isolated, portable or frequently relocated dust producing operations, a number of unit collector designs are availbale having capacities in the range of 200 to 1,000 CFM. Featuring small space and designed to recirculate the air, collectors of this type have been used extensively, especially in the metal working industry.

For additional information please refer to http://nis-co.com/dustcollector/Index.html.

Oleg Tchetchel
Process Engineer
Canadian Air Systems
http://nis-co.com/index.html
http://nis-co.com/scrubber/Index.html

 

About the Author

Chemical Physics Engineer

whats the best way besides welding the header collectors to stop exaust leaks?

ive tried doubling up on gaskets,aluminum gaskets,and metal gaskets i dont wanna weld them..if something broke down there id have to cut the exhaust off..help please?

the most likely cause of your excessive exhaust leaks is that the two surfaces are either not flat, or are not mating on the same plane, i would disconnect them, and run a grinding wheel lightly over the surface, and grind down any high spots, then test fit them together to make sure the angle is right, you may need to adjust one of the exhaust hangers to get them to line up parrallel to each other, only use one gasket, doubling up actually increases the odds of a leak

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