In the following photographs, we see a more professional installation from China that produces wood gas, in a more controlled manner, for indoor use on stoves. The stove is intended for remote farmers, unable to get bottled gas, to gasify their waste straw.
On the left, we see a downdraught gasifier, followed by a filtration cabinet with blower. Finally, on the right, there is a dual burner gas hob.A detail drawing follows. Excuse the comedic machine translation by the manufacturer.
Constructing something similar for one's own use would not be difficult but all the usual precautions for using a gas oven should be taken.