Carbonate eater high-molecular polymer two-stage indirect drying system and drying process

Abstract

The invention relates to a carbonate eater high-molecular polymer two-stage indirect drying system. The system comprises a paddle dryer, a steam pipe dryer and an alkali washing tower. The paddle dryer is provided with a feed port, a tail gas exhaust port, a second-grade dried tail gas input pipe, saturated steam input pipes I and II, steam condensed liquid discharge pipes I and II, and a dried material discharge port; the tail gas exhaust port is connected with a cloth bag dust remover I; the alkali washing tower is connected with a water sealing tank, and is provided with a spraying pipe, awaste gas exhaust pipe I and a waste water discharge pipe; the dried material discharge port is connected with a cloth bag dust remover II; one end of the steam pipe dryer is connected with a feedingcyclone, and a saturated steam input pipe III, a steam condensed liquid discharge pipe III, a product discharge pipe and a steam inlet are arranged at the other end; the steam inlet is connected witha steam heater and the second-grade dried tail gas input pipe; and the steam heater is provided with the saturated steam input pipe III and a steam condensed liquid discharge pipe IV, and one side isconnected with a fine filter and a rough-effect filter. The invention further discloses a drying process of the system. The system is excellent in drying effect and free of pollution.

Description

technical field [0001] The invention relates to the technical field of production of carbonate polymers, in particular to a two-stage indirect drying system for carbonate polymers and a drying process thereof. Background technique [0002] Carbonate polymers can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. At present, only aromatics have been produced industrially. [0003] Carbonate polymer is a colorless transparent thermoplastic polymer. It not only has high impact strength, excellent thermal stability, creep resistance and cold resistance, but also good electrical insulation and flame retardancy. And anti-ultraviolet, anti-aging. Among the currently used engineering plastics, the transparency of carbonate polymers is the best, and the visible light transmittance is as high as 90%. In addition, carbonate polymer has low density and is easy to process and shape. It is a kind of engineering plastic with excellent performance and wide applicati...

AI Technical Summary

Problems solved by technology

Fluidized bed drying requires a relatively narrow range of material particle size distribution, but it is difficult to achieve in actual production. In order to ensure the fluidization of large particles, too fine particles are easy to run away, and the flow rate is too low to form a dead bed. At the same time, the amount of exhaust gas after drying Large, the concentration of dichloromethane vapor contained in the tail gas is low and cannot be recovered. In the presence of water, dichloromethane will slowly decompose when heated, forming hydrochloric acid mist and corroding equipment

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