NaCL + CO2 + NH3 + H2O -> NaHCO3 & Nh4CL
the Ammonia in Ammoniaclorid and Natron - the later gets filtered out aigain. "The Ammoniaclorid" now gets by same glands reacted with
"Sodium perchlorate" (=NaClO4 is NACL which in the liver got biolectrical oxidated ) to Ammonia perchlorate.
What? That makes no sense. You're trying to say that you're going to filter NH4Cl? How? It's aqueous and soluble. Also, the CO2 and H2O do NOT react that way under the conditions you described. If I'm not mistaken, H2CO3 breaks apart spontaneously. Even if it did stick together, the Na would NEVER bond that way. Actually, in many of the cases you describe, no reaction occurs. They would just continue to be ions.
Also, "Ammoniachlorid? Do you mean Ammonium Chloride? Ammonia is the gas NH3, Ammonium is the NH4+ ion. Also, "biolectrical oxidated"? In the liver? With sodium chloride? To get electricity off of the stuff, you would have to separate the sodium and chloride, hook a wire between them, then run a salt bridge back over. Good luck with that. Even then, what's the point? Why do you need electricity? Unless you're talking about spending electricity to break them apart? Why would you do that? Let's release chlorine gas into the system, what could go wrong?
This is all assuming the dragon actually consumes enough sulfur in the first place. Unless the water is polluted or he's eating sulfur rocks, sulfur isn't terribly common in creatures. Even then, most of it is locked up in sulfides and sulfates, which are hard to free from the oxygens stuck on.
Good idea, it just doesn't work.