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To loosen the belt from the tensioner you will need to move the tensioner to the counterclockwise position. CLICK HERE FOR DETAILS .... Once you have the belt removed their will be one bolt that holds the tensioner on. CLICK HERE FOR INFO ..... If you have any questions let me know! I will be more than glad to assist you!
What you are seeing is the tensioner pulley. Their is only one pulley on it, the bottom part is the housing where the spring is at, it may look like a pulley but it is not.
If you put a socket on the actual pulley part you will turn it to the left (counterclockwise position) this will loosen the belt, which will allow you to take the belt off.
The other bolt is what holds the tensioner to the engine. The bolt is just regular threads which will loosen by turning it to the left also.