A tail heat utilization hot air penetrating countercurrent dryer

Abstract

The invention discloses a hot-air penetration and reversed-current drying machine for tail heat utilization. According to the invention, an air draft hood of a drying machine box body is connected with an induced draft fan, and the induced draft fan is tangentially connected with a cyclone dust removal and efficient tail heat recovery device which is formed by superposing a tubular heat exchanger and a cyclone dust remover, and then is emptied; a shell-pass intake end of the tubular heat exchanger is connected with an air blower, and an exhaust end is connected with an air intake hood via a steam finned heater; and blades of an induced draft fan impeller are arranged to be in a radial shape with impeller-shaft radial and central symmetry, and ash can be timely cleaned by virtue of a centrifugal force, thus security incidents are avoided. According to the invention, drying efficiency is improved, and energy conservation and emission reduction are realized; and more importantly, a detachment technology for the induced draft fan is greatly improved, and a pressure of components such as a nut on the end surface of a shaft shoulder of a screw during detachment for the induced draft fan can be simply eliminated, thus the problem is effectively solved that the induced draft fan is not easy to detach due to continuously automatic locking in thread assembly for the induced draft fan under the action of a load. The hot-air penetration and reversed-current drying machine for tail heat utilization is especially suitable for convenient detachment for a large fan after thread locking, and has a particularly remarkable effect.

Description

technical field [0001] The invention relates to a dryer, in particular to a tail heat utilization hot air type penetrating countercurrent dryer which does not accumulate dust in a fan and is easy to disassemble and repair. Background technique [0002] Due to its mature technology, strong adaptability, low operating cost and strong reliability, the hot air dryer is still one of the main preferred equipment for drying materials. If the material can be penetrated and countercurrently dried during the hot air drying process, And the effective recovery of tail heat is of special significance for improving drying efficiency and realizing energy saving and emission reduction. [0003] The induced draft fan is the key equipment of the hot air dryer. The induced draft fan is generally a centrifugal fan. The continuous, stable and reliable operation of the induced draft fan is very important for the dryer. Since most of the occasions where the dryer is used contain a certain amount o...

AI Technical Summary

Problems solved by technology

In the actual assembly of shafts and holes with transmission threads, in order to achieve large load-bearing functions, the size of the threaded shafts and matching nut-like components are relatively large, and it is often easy and convenient to screw in during assembly, and It can realize the automatic and continuous locking of the bearing capacity during use, so it is very reliable, but when it is disassembled, the assembly is often very tight, and disassembly is very difficult. It is particularly important to realize simple and easy disassembly under this condition

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