Production system and method for insoluble sulfur

A method for producing insoluble sulfur through a low-temperature melting process, comprising:

• S1. raising the temperature of liquid sulfur in the present of an initiator and under nitrogen shielding to perform polymerization reaction;
• S2. introducing the polymerized material into a quenching tower and carrying out granulation and quenching treatment sequentially;
• S3. carrying out solvent curing and extraction on the quenched product in the quenching tower;
• S4. carrying out liquid-phase circulated crushing and extraction treatment on the cured and extracted product in the quenching tower,
• wherein the insoluble sulfur production system comprises a cooler (300) and a kettle (100) having a first discharge port and a quenching tower (200) having a feed port, wherein the first discharge port is in communication with the feed port, and the quenching tower (200) comprises a housing (210) that is cylindrical in shape, a granulation device (220) and a shear pump (230), the housing (210) has a feed quenching section (211) and a discharging section (213) that are arranged from top to bottom, and a side wall of the housing (210) is provided with a solvent inlet (214) for providing a solvent and a quenching agent inlet (215) for providing a quenchant, wherein:
• the feed port is arranged on the feed quenching section (211), and the granulation device (220) is disposed in the feed quenching section (211);
• the discharging section (213) is provided with a second discharge port and a filter screen (260) above the second discharge port, and a side wall of the discharging section (213) above the filter screen (260) is provided with a circulating outlet and a circulating inlet in communication with an inlet and an outlet of the shear pump (230), respectively, and
• the housing (210) comprises a material separation section (216) for solid-liquid separation and a material circulation section (212) for circulating the materials between the feed quenching section (211) and the discharging section (213), an inner cylinder (240) and a device (250) for spraying a quenchant or solvent into the inner cylinder (240) are arranged in the material circulating section (212), and a circulating liquid outlet (217) for discharging the separated liquid is arranged in the side wall of a material separating section (216), the liquid discharged from the circulating liquid outlet (217) is cooled by the cooler (300) and sent by the circulating pump (280) to the circulating inlet, the circulating inlet is in communication with the device (250).