I'm not sure I understand how the 9 scoops of protein powder and 180lbs are connected...
Either way, it's not how much protein
powder you eat, it's your total protein consumption - I'll give you an example for me. My lean body mass is about 100 lbs and my 'goal weight' is around 130. So my target protein for the day is between 100g and 130g.
So yesterday I entered my food into fitday.com. I had tuna salad made with greek yogurt, some veggies, a ham bagel, some tilapia... no protein powder

At the bottom of the page it totals all the food up and I got a grand total of 116g of protein for the day.
Now, a few days back I did have a protein shake, and some steak and some... well you get the picture, and I came in at 130g of protein. Including the shake. But I don't calculate the shake separately, it's all about the total.
As far as 'wasted' protein, you might eat enough protein that it doesn't actually get used for muscle building - but in that case, it can just be used for 'regular' energy. But it's almost like saying you're 'wasting' fat because once you get past the small amount you really need, you still eat more. Still, unless you're over double your goal weight in grams of protein (360g of protein a day) I wouldn't worry about wasting it. Going a little over what you need won't do anything bad, being too low could slow down your growth or lead to muscle loss.
Also, higher protein is more necessary when you're eating fewer carbs. So I'd estimate that you should probably get between 180 and 225g of protein a day (men need more protein than women). If you're eating low carb, I'd aim for the higher number. If you're eating higher carb I wouldn't be as concerned.
Whether or not you have protein shakes is entirely dependent on how much protein you get from the rest of your food. If you end up at 100g of protein from what your normally eat, it's a good idea to make yourself a nice protein shake to get the remaining 50g or so. If you end up with 200g of protein from your meals, don't sweat it.
The easiest way to know for sure is to use a site like fitday or livestrong and enter in everything you eat to see exactly where things stand for you.
Hope that helps.