怎样进行热氨溶霜操作?

2025-04-05 08:04:17
推荐回答(1个)
回答1:

热氨溶霜适用于光源排管、翅片排管和冷风机。它是以高压蒸汽通入排管内,利用氨气的热量使管外霜层溶化脱落,将排管内的润滑油冲回排液桶。其操作方法如下:
(1)溶霜前,先检查排液桶的液面和压力,如有液氨应排除,然后减压,使排液桶处于低压状态。对于利用低压循环桶作排液桶的设备,应减少从储液器流来的液氨量,使低压循环桶内的氨液位处在40%以下。
(2)关闭调节站上的供液阀,使库房处于停止工作状态。
(3)开启调节站上的排液阀及排液桶上的进液阀,缓慢开启调节站上的热氨总阀和通向库房的热氨阀(注意表压不得超过0.588MPa),间歇开关分调节站的排液阀,以增加管内的压力,进行冲霜排液。
(4)当排管表面的霜层完全溶化后,关闭调节站上的热氨阀和热氨总阀及调节站上的排液阀、排液桶上的进液阀,并停止冲霜。
(5)微开调节站上的回气阀,降低排管内的压力,当管内压力降到与蒸发压力基本一致时,再开启调节站上的供液阀,恢复到制冷系统正常工作。
注意:在溶霜过程中,应注意观察排液桶的液位,当桶内液位达80%时,应停止溶霜,将排液桶中液氨排走后再进行溶霜。

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