What causes the sulfur discharge pipe in the sulfur melting tank to be blocked?

When sulfur is heated, its molecular structure changes. At 160°C, the rings in S8 begin to break apart, turning it into a linear structure; as a result, the viscosity increases. The viscosity reaches its maximum at 190°C. Upon further heating, the long chains start to break, and the viscosity decreases again. Liquid sulfur has the best flowability between 130 and 160°C. In sulfur vapor, the following equilibrium exists: 3S8 === 4S6 === 12S2. As the temperature rises, the equilibrium shifts gradually to the right; when the temperature approaches 760°C, almost all of it converts into S2. ②Changes in physical form (appearance): It is a yellow solid below 112.8°C, a yellow flowing liquid between 112.8°C and 250°C, a dark brown viscous liquid between 250°C and 300°C, a dark brown flowing liquid between 300°C and 444.6°C, an orange-yellow gas between 444.6°C and 650°C, a grass-green gas between 650°C and 1000°C, and a colorless gas above 1000°C.

During the last slag discharge, it was not done thoroughly, and residues were left to block the sulfur outlet pipe.

This post was last edited by Gao Yunguan on 2017-11-14 09:46. Clogging of the sulfur discharge pipe is a common issue; it is mainly due to an unreasonable design of the sulfur melting tank and incomplete separation of sulfur from water. It has little to do with the sulfur discharge pipe itself, and may be related to the piping system or operating procedures

It might be that the heating temperature at your sulfur release pipe is not high enough, resulting in the sulfur not being in a proper fluid state yet.