A design for smelter/washer/smoker setup that can handle any amount of item you could throw at it. Really, the limit is how much item you can dump in this module.
Schmatics : https://mega.nz/folder/pS421Q4Q#BntvA...
Edit : After upload...I have thought a bit more and there is theorically an even faster method to bulk smelt items and easier way to have input be infinite. Thus I change "max" to "high" since it can get even better!