Novel carbon dioxide liquefaction device and preparation method

Abstract

The invention discloses a novel carbon dioxide liquefaction device and preparation method. The device comprises a liquid ammonia tank, an ammonia-liquid separator and a carbon dioxide condenser; liquid ammonia in the liquid ammonia tank is conveyed to the bottom of the ammonia-liquid separator through a first pipeline by means of a regulating valve, and the bottom of the ammonia-liquid separator conveys the liquid ammonia to the bottom of the carbon dioxide condenser through a second pipeline; the liquid ammonia gasified by heat exchange and temperature rise in the carbon dioxide condenser isconveyed to a middle inlet valve of the ammonia-liquid separator through a third pipeline; ammonia gas at the upper part of a chamber of the ammonia-liquid separator is conveyed to an inlet of a refrigeration compressor through a fourth pipeline, and the ammonia gas circularly flows back to the liquid ammonia tank through an evaporation type condenser in sequence; and an aluminum finned plate heatexchanger is arranged in the carbon dioxide condenser, and gaseous carbon dioxide enters the aluminum finned plate heat exchanger from an upper pipeline and is condensed and then comes out from a lower pipeline. The integrated equipment is small in occupied space, the cold energy conversion rate is high, stable liquid level can be ensured, and overheating boiling can be avoided.

Description

Technical field [0001] This solution belongs to the field of refrigeration technology, and specifically relates to a carbon dioxide liquefaction device. Background technique [0002] The volume of the existing carbon dioxide liquefaction device is relatively huge, which reduces the space utilization rate. The installation method is a flat layout, which does not fully save space, and the conversion rate of cold energy is not high. The current carbon dioxide liquefaction process is that liquid ammonia enters the shell side of the carbon dioxide liquefier through a pipeline and a regulating valve. The regulating valve controls the liquid level. The liquid ammonia is vaporized under reduced pressure in the shell side of the carbon dioxide liquefier. The gas will occupy most of the heat exchange area. As a result, this equipment will be very large, and at the same time, the liquid ammonia and gas ammonia that have just entered will become overheated, which will affect the heat exchang...

AI Technical Summary

Problems solved by technology

The current carbon dioxide liquefaction process is that liquid ammonia enters the shell side of the carbon dioxide liquefier through the pipeline and the regulating valve, and the regulating valve controls the liquid level. The liquid ammonia is decompressed and gasified at the shell side of the carbon dioxide liquefier, and the gas will occupy most of the heat exchange area. As a result, the equipment will be very large, and at the same time, the liquid ammonia and gas ammonia that have just come in will become overheated, which will affect the heat exchange effect

The liquid level in the shell side of the traditional carbon dioxide liquefier is unstable, the liquid level fluctuates greatly, there is liquid overheating, and violent boiling often occurs

Images