These are a couple of very simple to construct waste oil burners.
They will run on anything from engine oil to veg, transmission fluid, Hydrulic and any other oil. You can warm up some animal fat or lard and they will be perfectly happy with that too!
The key to these burners is the air/ oil feed tube. It's just a bit of exhaust pipe with a 90o bend and a plate over the end to make the air come out sideways not straight. I have tested the design without the diffusion plate and it does work but startup is much harder and the burner is much more finicky on oil feed when controlling the output.
The oil is gravity fed from a high mounted container with a gate valve on the drum to control oil flow. The oil is dribbled into the end of the air inlet pipe and is simply blown into the burner by the incoming air from the blower. There are NO nozzles, pumps or anything else than the oil simply running out a bit of hose. Given the valve controls the fuel flow, there is no fixed fuel consumption. The more fuel ( and air) it gets, the more heat it produces, it's that simple. The pipe is about 1.75" and is not critical size. The larger the pipe the better the airflow and the more oxygen available to produce more heat. I have some larger pipe to make a bigger version of this blower.
A small amount of starting fluid is put in the burner or it can be started with a bunch of old rag or some burning sticks. The Blower is turned on low and restricted to limit the airflow and the oil added till the metal burn chamber gets hot and vaporises the oil. From there the oil and fuel can be opened up a the thing can be run flat out.
This design is very easy to light and burns very clean with no smoke at all unless the oil feed is grossly over supplied. Even then with a large amount of oil pooled in the bottom of the burn chamber, because the air feed is above the oil pool it still burns clean.
This same setup has been used in my furnace built from dirt. It is just the curved pipe with the deflector on the end.
You can see in other vids on my channel that I also turned the extinguisher bottle in the 2nd Vid on it's side and the thing ran perfectly well like that with no oil running out.
Nothing on these burners is critical. It is the principal that is important not the size of the components. The important thing to remember is the burner/ combustion chamber, whatever it is, needs to be HOT before adding the oil. In specific terms, 300oC+. that will allow the oil to change state from a liquid to a gas and burn.
These burners are like an engine. They can be put to many different uses and power many different things.
People have built them for everything from shed and greenhouse heaters to heating and melting metal, replacing gas burners in boilers and pool heaters and in furnaces.
This is to give you the idea of how to build the engine to put to work in the purpose you need.