Square jacket spandex spinning channel

Abstract

The invention relates to a square jacket spandex spinning channel which comprises an upper square channel body, a middle square channel body and a lower square channel body. The upper square channel body, the middle square channel body and the lower square channel body are communicated. The periphery of the upper channel body and the periphery of the middle channel body are provided with an upper heat tracing jacket and a middle heat tracing jacket respectively. An upper channel heating medium steam inlet, an upper channel exhaust port and an upper channel heating medium condensate outlet are formed in the corresponding portions of the upper heat tracing jacket. A middle channel heating medium steam inlet, a middle channel exhaust port and a middle channel heating medium condensate outlet are formed in the corresponding portions of the middle heat tracing jacket. The upper channel heating medium steam inlet and the middle channel heating medium steam inlet are independently in butt joint with a diphenyl and diphenyl ether heating medium steam generation device. The upper channel heating medium condensate outlet and the middle channel heating medium condensate outlet are connected with the diphenyl and diphenyl ether heating medium steam generation device to achieve heating medium circulation. Gas-phase heating medium jacket heat tracing of the square channel is achieved, the lower channel body does not need to bear pressure on the premise that the heat tracing temperature is guaranteed, and the heat tracing effect of the square channel is improved.

Description

technical field [0001] The invention relates to a spandex dry spinning tunnel, in particular to a jacket-type heated square spandex spinning tunnel. Background technique [0002] In the dry spinning process of spandex, according to different varieties of spandex yarn, the spinning temperature is about 230℃~265℃. In order to avoid the heat loss of the tunnel wall during the spinning process, in addition to the insulation of the spinning tunnel, Usually, a jacket (circular tunnel) or a heat tracing pipe (square tunnel) is provided on the outer wall of the tunnel, and a heat medium (steam or heat transfer oil) is introduced into the jacket or the tracing pipe to compensate for the heat lost during the production process of the tunnel. [0003] Before 2000, the dry spinning of spandex basically used a circular jacket tunnel. Because the circular tunnel jacket can be designed and processed as pressure-bearing equipment, in the spinning production process, saturated steam above 2...

AI Technical Summary

Problems solved by technology

The circular heat tracing tube is close to the outer wall of the tunnel and is in linear contact with the outer wall of the tunnel. The heat transfer area is small, the heat transfer effect is poor, and it will cause uneven heating of the tunnel wall

In order to increase the heat transfer effect, during the construction process, heat-conducting cement is applied around the heat-tracing pipe, so that the line contact between the heat-tracing pipe and the outer wall of the tunnel becomes surface contact, but there is still a gap between the heat-tracing pipe and the pipe, causing the entire outer wall of the tunnel Inhomogeneous temperature, good uniformity of heating without jacket

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