# filth

This word can refer to dung or to vomit, so you should use a general word here that can refer to either.

# the daughters of Zion

Possible meanings are 1) the women of Jerusalem or 2) the people of Jerusalem.

# will have cleansed the blood stains from the midst of Jerusalem

"will have taken away those in Jerusalem who harm innocent people"

# by means of the spirit of judgment and the spirit of flaming fire

"by judgment and flaming fire" 

# the spirit of flaming fire

Possible meanings are 1) Yahweh will remove sinners from Zion like a fire removes impurities or 2) "flaming fire" represents the destruction in general of all the sinners.