Double-cylinder type steam drying system

Abstract

The invention relates to a double-cylinder type steam drying system. The system comprises a double-cylinder steam drying machine and a steam heat exchange air distribution device for providing hot air into the double-cylinder steam drying machine, wherein an inner cylinder body and an outer cylinder body of the double-cylinder steam drying machine are cylindrical and are coaxially fixed; heat dissipation pipes are arranged on the inner surface and the outer surface of the inner cylinder body; heat dissipation pipes are also arranged on the inner surface of the outer cylinder body; a rotating connector is arranged at the end of a multi-stage cylinder body group; and the rotating connector is used for feeding air and returning water; air inlet pipe groups for introducing steam and water returning pipe groups for discharging condensate water are arranged between the rotating connector and the heat dissipation pipes. According to the double-cylinder type steam drying system, flexible guide pipes are arranged on the air inlet pipe groups, the water returning pipe groups and the air guide pipe groups; the precision requirements for machining and assembling are low, so that installation is convenient and fast; the flexible guide pipes can compensate uncontrollable variable stress; all pipelines and corresponding parts are protected; the fault rate is reduced; the maintenance cost is reduced; the working efficiency is improved; and continuous production of factories is facilitated.

Description

technical field [0001] The invention relates to the technical field of dryers, in particular to a double-cylinder steam drying system. Background technique [0002] Drum drying equipment is one of the important equipment used for drying cigarettes, food, materials, flowers and other materials for many years. The existing drum drying equipment can be divided into two types according to the nature of the drying heat source, namely hot air heat exchange Type dryers and steam heat exchange dryers, hot air heat exchange dryers generally pass hot air directly into the drum as the drying heat source, that is, when the materials are flipped and sprinkled in the drum, they are connected to the drum. The hot air contacts to take away the moisture to achieve drying. Since the drying equipment is in a state of feeding and discharging, most of the heat of the hot air may be lost before being used during the drying process, resulting in energy consumption. If it is too large, it will ser...

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Problems solved by technology

[0002] Drum drying equipment is one of the important equipment used for drying cigarettes, food, materials, flowers and other materials for many years. The existing drum drying equipment can be divided into two types according to the nature of the drying heat source, namely hot air heat exchange Type dryers and steam heat exchange dryers, hot air heat exchange dryers generally pass hot air directly into the drum as the drying heat source, that is, when the materials are flipped and sprinkled in the drum, they are connected to the drum. The hot air contacts to take away the moisture to achieve drying. Since the drying equipment is in a state of feeding and discharging, most of the heat of the hot air may be lost before being used during the drying process, resulting in energy consumption. If it is too large, it will seriously increase the production cost and cause energy waste. The shortcomings of the hot air heat exchange dryer are more prominent, which in turn promotes the birth of the steam heat exchange dryer. The steam heat exchange dryer passes through the inner wall of the drum. It is covered with heat dissipation pipes, and hot steam is introduced into the heat dissipation pipes. The material is turned over and sprinkled in the drum while contacting the heat dissipation pipes to achieve drying. However, it is necessary to connect the external steam source to the heat dissipation pipes on the inner wall of the drum. The coaxially installed rotary joints are directly welded connecting pipes between the rotary joints and the heat dissipation pipes on the inner wall of the drum, and the connecting pipes are also directly welded between the multi-stage drums to connect steam, which increases the difficulty of processing and assembly. Not to mention, the drum rotates During the process, there will be slight relative movement between the drum and the drum, and between the drum and the rotary joint, which will cause the above-mentioned connecting pipes to be constantly rubbed under the action of alternating stress, making the joints at both ends easily damaged. Damage, high maintenance cost, difficult maintenance and complicated process, lower production efficiency, and not conducive to continuous production of the factory

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