I have data in an Excel spreadsheet with delimited strings. For simplicity, think of something like \"4#8#10\", with an arbitrary number of pieces.
\"4#8#10\"
Is
With your data in A1, in B1 enter:
=TRIM(MID(SUBSTITUTE($A1,"#",REPT(" ",999)),COLUMNS($A:A)*999-998,999))
and copy across.