- #1
taylaron
Gold Member
- 397
- 1
Greetings PFers,
I'm working on a project where micron size metal or plastic particles are carried inside an argon or nitrogen stream at ~1 atm. The particles travel through at 1/4'' ID nylon tube before they enter a chamber where they then travel through a pyrex tube. I have four 4'', 500W halogen light bulbs around the tube perimeter that are meant to heat up the airborne particles to their melting point.
My problem is the particles enter the heater chamber with a stream diameter of 1/4''. I need to focus those particles down to under 0.02 in. Due to the hot nature of the chamber, stray particles will inevitably adhere to the glass tube and eventually clog the system. I'm trying to find an aerodynamic solution to my problem. OR, find a way to use the halogen heaters as an electron sprayer and have high voltage plates to focus the now charged particles into a small beam diameter.
Is there any way I can get the electrons to pass through the glass walls of the halogen bulbs and impact the particle stream?
Image notes:
yellow objects are the halogen bulbs
Pink object is the pyrex tube with focusing rings
blue objects are the insulating caps
grey object on the bottom is the final focusing chamber where the air is removed from around the particle stream.
grey object on the top is a push to connect fitting
Black objcts are stainless steel rods holding the assembly together
I'm working on a project where micron size metal or plastic particles are carried inside an argon or nitrogen stream at ~1 atm. The particles travel through at 1/4'' ID nylon tube before they enter a chamber where they then travel through a pyrex tube. I have four 4'', 500W halogen light bulbs around the tube perimeter that are meant to heat up the airborne particles to their melting point.
My problem is the particles enter the heater chamber with a stream diameter of 1/4''. I need to focus those particles down to under 0.02 in. Due to the hot nature of the chamber, stray particles will inevitably adhere to the glass tube and eventually clog the system. I'm trying to find an aerodynamic solution to my problem. OR, find a way to use the halogen heaters as an electron sprayer and have high voltage plates to focus the now charged particles into a small beam diameter.
Is there any way I can get the electrons to pass through the glass walls of the halogen bulbs and impact the particle stream?
Image notes:
yellow objects are the halogen bulbs
Pink object is the pyrex tube with focusing rings
blue objects are the insulating caps
grey object on the bottom is the final focusing chamber where the air is removed from around the particle stream.
grey object on the top is a push to connect fitting
Black objcts are stainless steel rods holding the assembly together