Yes, it can burn. Yes, in a general sense, it is considered a hydrocarbon. Most organics are, actually. But no, you won't get anything of performance out of it. Try burning wood instead. You can just jam plant matter into a furnace for that matter, and get about the same result.
I actually need to edit my response here... I shouldn't have said 'in a general sense'. Rather, 'in an incorrect sense'. I have heard organics in general referred to as hydrocarbons, but strictly speaking, it refers to any compound that is only carbon and hydrogen, which goes from methane and butane to benzene and cubane. However, most people think of saturated straight chain hydrocarbons like octane and propane when talking about hydrocarbons.