Without blood, yes. Without some form of ritual…well depends on how you define it. Some would define meditations as a form of ritual, while others would define them as being the stereotypical imagery that comes to mind upon hearing the word. If you are looking for an evocation without any additional tools/ingredients, check this one out:
It really can be used for any spirit, not just demons in my opinion. I’ve used it for landvaettir with as much success as demons when I want to venture outside of my usual method