Ammonia refrigeration first-stage compression system and ammonia recovery device

Abstract

The invention discloses an ammonia refrigeration first-stage compression system and an ammonia recovery device, a liquefaction tank, a first-stage gas-liquid separation tank, a first-stage compressor, a first-stage oil-gas separator, a first oil return pipeline, a second oil return pipeline, pneumatic valve devices, a temperature detector and a controller are included, an ammonia gas-liquid mixture inlet of the first-stage gas-liquid separation tank is communicated with a tube pass outlet of the liquefaction tank, a gas outlet of the first-stage gas-liquid separation tank is communicated with a compression inlet of the first-stage compressor, and an oil outlet of the first-stage oil-gas separator is communicated with the compression inlet of the first-stage compressor through the first oil return pipeline; and a compression outlet of the first-stage compressor is communicated with the first-stage oil-gas separator, the oil outlet of the first-stage oil-gas separator is further communicated with the compression inlet of the first-stage compressor through the second oil return pipeline, the first oil return pipeline and the second oil return pipeline are respectively provided with one pneumatic valve device, and the first oil return pipeline is further provided with the temperature detector. Smooth oil return of the first oil return pipeline can be achieved, and it is guaranteed that the liquid level of the first-stage gas-liquid separation tank is within the normal range.

Description

technical field [0001] The invention relates to the field of textiles, in particular to an ammonia refrigeration first-stage compression system and an ammonia recovery device. Background technique [0002] In the textile field, the liquid ammonia mercerizing machine generally uses a low-pressure ammonia recovery device for ammonia recovery. This recovery device uses an ammonia refrigeration system. Due to the unreasonable design of the refrigeration oil return pipeline of the ammonia refrigeration system, the oil return is not smooth. , The liquid level failure of the primary separation tank of the ammonia refrigeration system and the oil shortage alarm of the primary oil-gas separator often occur. At present, to solve these faults, it is necessary to stop the machine first, and then start the machine after draining oil from the primary separation tank or replenishing oil to the primary oil-gas separator, which affects production and wastes energy. Contents of the inventio...

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Problems solved by technology

[0003] Based on this, it is necessary to provide a first-stage compression system for ammonia refrigeration and an ammonia recovery device for the problems of low production efficiency and waste of energy in the traditional liquid ammonia mercerizing machine

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