Tail heat recovery type steam flat-plate dryer

Abstract

The invention discloses a tail heat recovery type steam flat-plate dryer. Driving wheels, driven wheels and scraping plates are arranged on the dryer and used for driving materials to be conveyed on steam flat-plates. An upper drying zone is connected with a cyclone dust collection and tail heat high-efficiency recoverer through a draught fan in the tangential direction, and the cyclone dust collection and tail heat high-efficiency recoverer is formed by overlapping a tubular heat exchanger and a cyclone dust collector. The upper end of a shell pass of the tubular heat exchanger is connected with an air inlet pipe. The lower end of the shell pass of the tubular heat exchanger is connected with a lower drying zone through an air blower. An impeller of the draught fan is provided with blades which are in a hollow inverted water drop shape, and a back plate of the impeller is of a dish-shaped structure. The contour line of the draught fan is an involute. According to the tail heat recovery type steam flat-plate dryer, tail heat recovery and dust collection are creatively integrated, and the cyclone dust collection and tail heat high-efficiency recoverer is designed, so that tail heat recovery and dust collection are completed in one step, equipment investment is reduced, and the working efficiency is improved; the blades are in the hollow inverted water drop shape, and the back plate is of the dish-shaped structure, so dust is cleaned away in real time, the strength of the impeller of the draught fan is improved, stability is enhanced, safety accidents caused by dust accumulation are effectively eradicated, and the application prospects are wide.

Description

technical field [0001] The invention relates to a dryer, in particular to a tail heat recovery type steam plate dryer which does not accumulate dust in a fan. Background technique [0002] Due to its mature technology, strong adaptability, low energy consumption and high reliability, the steam heating plate dryer has become one of the main preferred equipment for drying materials. The material is conveyed by scraper on the steam heating plate for contact heating drying. Due to the simple structure, extremely low energy consumption, strong processing capacity, and each layer of material is turned over, the quality of the dried product is particularly uniform and reliable. However, the drying process needs to continuously discharge hot and humid tail gas to promote the drying process. Since the exhaust gas is rich in a large amount of tail heat, it is necessary to perform tail heat recovery operation on the tail gas, so it is of great significance to optimize the design of tai...

AI Technical Summary

Problems solved by technology

Once part of the hardened dust is shaken off, it will immediately leave the dynamic rotation balance of the induced draft fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents

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