Isoprenerubber post-treatment one-step processing technique and dehydrating and drying machine

Abstract

The invention discloses an isoprenerubber post-treatment one-step processing technique. In the technique, an extrusion dehydration procedure and an expansion drying procedure are combined to form a continuous processing type procedure; water-containing rubber particles are pushed into an extrusion dehydration section of a conical cylinder structure, a compression ratio and dehydrating amount are increased; the dehydrated rubber material is pushed into the expansion drying section, the compression ratio is increased, and the rubber material is sheared and blended by a plurality of rows of shearing screws on the straight cylinder in the expansion drying section, and the rubber material is heated; and the rubber material is delivered to a fusion, homogenization and discharging section, a compression ratio is increased, the rubber material, which is sheared and heated intensively in a short time, is discharged out from template holes when the mooney viscosity of the rubber particles does not drop suddenly, the rubber particles are expanded instantly, and the rubber material is separated from volatile matters. In the technique, the isoprenerubber industrial production process flow is simplified, a 'two-step' post-treatment process is simplified into a 'one-step' process; and about 40 percent of equipment investment cost, about 50 percent of floor area and about 27 percent of energy are saved, the single-machine yield is improved by over 5 percent, labor intensity of workers is lowered and obvious economic benefit is achieved.

Description

technical field [0001] The invention relates to a "one-step" processing technology of extruding dehydration and expansion drying after the industrial production of synthetic rubber isoprene in the petrochemical industry and a large-scale extrusion dehydration, expansion and drying integrated machine used therein. Background technique [0002] Isoprene synthetic rubber is similar to natural rubber in performance and structure, so it is called "synthetic natural rubber". After polymerization, coagulation washing, vibrating screen dehydration and other processes, the physical properties of the water-containing colloidal pellets are relatively special, especially the Mooney viscosity is high, and it is easy to be thermally cracked and thermally oxidized in the process of extrusion dehydration and expansion drying. If it is not handled properly , will cause a sharp drop in the Mooney viscosity of the colloidal particles, and even make it impossible to continue processing. Due to th...

AI Technical Summary

Problems solved by technology

Using this "two-step method" process requires a large investment in equipment, a large area, high energy consumption indicators, and high operating costs. In addition, the cage bar of the extrusion dehydrator leaks glue, and the feed port of the expansion dryer is often blocked, which affects Production efficiency and operation are also extremely inconvenient. Due to defects in the design of the two machines, the Mooney viscosity of the colloidal particles after drying has a large drop

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