Liquid sulfur pipeline for sulfur melting system for preparing acid from sulfur

The invention discloses a liquid sulfur pipeline for a sulfur melting system for preparing acid from sulfur, the structure of the liquid sulfur pipeline comprises a four-way pipe, the four-way pipe is a cross-shaped structure formed by mutually connecting a first horizontal pipe, a second horizontal pipe, an upper vertical pipe and a lower vertical pipe, and the second horizontal pipe and the upper vertical pipe are both provided with observation sight glasses; the outer wall of the first horizontal pipe, the outer wall of the second horizontal pipe, the outer wall of the upper vertical pipe and the outer wall of the lower vertical pipe are each sleeved with a steam heat tracing sleeve, and the steam heat tracing sleeve arranged on the first horizontal pipe in a sleeving mode is connected with one side of the steam heat tracing sleeve arranged on the upper vertical pipe and one side of the steam heat tracing sleeve arranged on the lower vertical pipe in a sleeving mode through communicating pipes. The steam h