It's like a massive Coleman gas stove burner. If you've ever used a Coleman gasoline ("Coleman fuel" or white gas) stove you'll recognize how many of the parts work. And as it says in the operating instructions, It's designed to burn gasoline, not kerosene.
The gasoline tanks get pressurized with air- usually by hand pump - to push raw gasoline through the fuel valve to the generator.
The "generator" is a tube leading to the burners that is heated by the flames from the burners. The raw gasoline flows into the generator and is turned into (generates) a hot gas vapor.
By using burner heat to preheat and vaporize the gasoline, it gives much hotter, cleaner burning flames than by just burning raw gasoline.
Might be for a large Army field kitchen ? But with that many burners, that size, whatever it was meant to heat sure was a big pot !!!!