1, insoluble sulfur sputum dryer - equipment overview

Insoluble sulfur is a sulfur-based polymer. It is named because it is insoluble in solvents such as carbon disulfide or tetrachloroethylene, and is widely used as a vulcanizing agent in the tire industry. With the meridianization of tires, the demand for insoluble sulfur has increased rapidly. Therefore, in recent years, the research on insoluble sulfur has attracted more and more attention, and some production methods have been developed, but there are some quality stability and safety. And environmental protection issues.

Jiangsu Bohong produces insoluble sulfur-sulfony drying equipment process, which can realize the whole process including melting sulfur, heating, quenching, conveying, solidification, coarse crushing, maturation, fine crushing, sieving, cleaning, tray dryer drying and oil filling. The process is closed production, completely eliminates dust, and achieves the purpose of environmentally friendly clean production. The method of installing conveyor belt in the reaction tank is convenient to pass high-temperature sulfur and quenched by carbon disulfide, coarsely pulverizing by screw conveyor, and fine crushing by colloid mill. It can not only achieve good pulverization effect, but also can not bring in impurities. After the oil is filled in the simmer dryer, the insoluble sulphur product is formed, and no additional oil filling process and conveyor belt are needed to ensure no dust pollution.

A method for producing insoluble sulfur, comprising the following steps:

Step (1), melting sulfur, heating: the sulfur is placed in a sulfur bath and melted, and then pumped by liquid sulfur to an electric heater to raise the temperature to 450-600 ° C;

Step (2), quenching: carbon disulfide at a temperature of 10-25 ° C is added from the carbon disulfide storage tank to the reaction tank to submerge the conveyor belt, and the liquid gaseous sulfur of 45 〇 -6 ° C is sprayed from the electric heater. In the reaction tank, the low temperature carbon disulfide quenches the sulfur in the high temperature liquid state, and the cooled insoluble sulfur is precipitated to the conveyor belt;

Step (3), conveying and solidifying: the insoluble sulfur deposited on the conveyor belt moves along with the conveyor belt, and the insoluble sulfur is solidified after a period of time;

Step (4), coarse pulverization: solidified insoluble sulfur is dropped in a screw conveyor and coarsely pulverized under extrusion of a screw;

Step (5), ripening and fine pulverization: the coarsely pulverized insoluble sulfur is introduced into the aging tank under the extrusion of the screw in the screw conveyor, and heated by the jacketed hot water of the aging tank to 75_85 ° C for 1 to 3 hours, and simultaneously opened. Colloid mill, cross-grinding insoluble sulfur to 350-450 mesh to complete aging and fine pulverization;

Step (6), sieving, washing, drying, and oil filling: the material is sieved through the screen and then enters the dryer. The carbon disulfide containing soluble sulfur is discharged from the liquid outlet of the dryer through the sieve to leave insoluble powder. In the heating jacket of the dryer, the hot water of 80-90 °C is continuously introduced to heat and dry the insoluble sulfur. The carbon disulfide gas containing no soluble sulfur in the dryer is pumped out by the vacuum pump and condensed into a liquid flow back through the condenser. The carbon disulfide storage tank is recycled. After the drying is completed, the metering pump is sprayed into the naphthenic oil, and the stirring in the dryer is started to complete the oil filling.

Preferably, in the step (1), the sulfur is heated to 550 ° C in the electric heater; in the step (2), the temperature of the carbon disulfide is 10 ° C; in the step (5), the insoluble sulfur is in the aging tank Heating to 80 ° C, holding for 2 hours, grinding insoluble sulfur to 400 mesh; in the step (6), carbon disulfide containing soluble sulfur is discharged from the drain pipe of the dryer to the distillation column through a strainer to separate the pure The carbon disulfide gas was condensed through a condenser to a liquid state of 25 °C.