What is the meaning of Boilery?

A buisness (and place of business) that engages primarily in boiling, such as in the boiling of sugarcane juice to make sugar, the boiling of brine to make salt, the boiling of soap or tallow, the boiling of bones to make glue, etc.

A room or area where there is equipment for boiling that is part of a larger establishment, such as equipment for rendering blubber on board a whaling vessel, or vats for boiling laundry as part of a large farmhouse.

Source: wiktionary.org