Can you convert a stackable dryer 220 to a 110, and how

They sell inline lint traps, that can be installed along the exhaust vent.

This should catch most; if not all of the excess lint, and give you a convenient easy way to clean the lint. The lint should be cleaned often (along with the dryers internal lint trap), to increase dryer efficiency and decrease the chance of fire.

Keep in mind, these are recommended to be used with a "booster fan" setup. If your exhaust line is longer than about 6' (1.8 m), you'll have to install a dryer booster fan to safely use one of these lint traps.

If you have a gas dryer, you may not be able to use an inline lint trap. Check with the manufacturer of the dryer, before installing a lint trap like this.

Warning

They sell products like this that have an open front, that "deflect" heat into the house. These are not a good idea, since they also "deflect" moisture into the home which can lead to mold and poor indoor air quality.

You could replace the cord on the dryer, but you'd have to bond the chassis of the dryer to make that acceptable to current NEC codes (Article 250.140). This can be a safety hazard if done incorrectly, and it may or may not void the warranty on the dryer.

Since your dryer is set up to use a 4 prong receptacle, the optimal solution would be to update the receptacle to a 4 prong (NEMA 14-30R if I remember correctly). However, this will require you to run new cable to the receptacle, since you'll need a cable with a ground. Depending on the draw of the dryer and the length of the run, you'll either have to pull new 10-3 /w ground or 8-3 /w ground cable.

EDIT:

As @TheEvilGreebo pointed out, you may be able to simply swap out the cord on the dryer for a 3 prong version. Check the manufacturers documentation to verify the procedure, and to make sure your model supports this.

EDIT:

This schematic for an electric dryer might help you understand how the dryer could be wired (depending on make/model/manufacture date).