Get image from taxonomy term using ACF

Ok, so you are getting the value of the field, you just need to set how it should output, like so:

$image = get_field('image', $taxonomy . '_' . $term_id);
echo '<img src="'.$image['sizes']['thumbnail'].'" alt="$image['alt']" />';

This assumes that you want to use the thumbnail image size. If using a different size, change that text to the appropriate image size.

If you want to return the full size image, use the following code:

$image = get_field('image', $taxonomy . '_' . $term_id);
echo '<img src="'.$image['url'].'" alt="$image['alt']" />';