

tested in versions:

1.16
1.16.1
1.16.2
1.16.3
1.16.4
1.16.5
1.17
1.18

afaik should also work in versions:

1.18.1
1.18.2
1.19

smelter array x144 by Pfeffabeissa - https://www.youtube.com/watch?v=FigjWhMTsTw

5-wide, tileable, smelts 1 full shulker in 3 minutes


the smelter is designed for blaze rods as fuel.. with one shulker box blaze rods you can smelt 12 full shulkers of items..
if you're using a more potent fuel (dried kelp block/ coal block) you might end up wasting fuel per operation 
or you have fuel remaining in some smelter after the process..
I think the smelter is not capable using lesser fuels (like coal, all types/items out of wood) and might probably break, 
bcs of the internal timings in the smelter..
haven't tested it, same as lava buckets as fuel, which might not work, too, bcs I dont see a way to extract the empty buckets..


the download contains an additional schematic of the smelter array, which was made by me (madd8t).. 
that version of the smelter has a central input system for the fuel and items, 
so that you dont have to climb around the machine to get everything running..