Heat pump type penetrating counter-flow drying machine adopting tail heat utilization

Abstract

The invention discloses a heat pump type penetrating counter-flow drying machine adopting tail heat utilization. A draft hood of the drying machine is connected with an induced draft fan; the induced draft fan is connected with an evaporator of a heat pump system by the aid of a cyclone dust collector and then performs venting; the evaporator of the heat pump system is connected with a main machine by the aid of a refrigerant pipe; the main machine is connected with a condenser by the aid of the refrigerant pipe; an air outlet end of an air blower is connected with an air inlet hood by the aid of the condenser; blades of an induced draft fan impeller are arranged in a radiation shape symmetric about the center in the radial direction of the impeller axis, dust can be cleaned timely by the aid of centrifugal force, and safety accidents can be avoided. According to the machine, the drying efficiency is improved, energy saving and emission reduction are realized, more importantly, the mounting and dismounting technology of the induced draft fan is substantially changed, pressure caused by components like nuts on screw shaft shoulder end surfaces can be eliminated simply during dismounting of the induced draft fan, the problem that the induced draft fan adopting threaded assembly continuously and automatically locks under the effect of a load and is not easy to dismount is solved effectively, the technology is particularly suitable for convenient dismounting of large fans after threaded locking, and the effect is particularly significant.

Description

technical field [0001] The invention relates to a dryer, in particular to a heat pump tail heat utilization penetrating countercurrent dryer which does not accumulate dust in a fan and is easy to disassemble and repair. Background technique [0002] People generally refer to drying with a drying temperature below 60 degrees Celsius as low-temperature drying. Low-temperature drying is widely used in the drying of heat-sensitive materials such as crop seeds, Chinese medicinal materials, and biological products. Due to its mature technology, strong adaptability, low operating cost and high reliability, hot air dryer is still one of the first choice equipment for low temperature drying. Low-temperature drying is less likely to utilize tail heat due to the lower temperature of exhaust gas. If the penetration and countercurrent drying of materials can be realized in the hot-air low-temperature drying process, and the tail heat can be effectively recovered, it will be of great sig...

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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