A new type of carbon dioxide liquefaction device and preparation method

Abstract

The invention discloses a novel carbon dioxide liquefaction device and a preparation method. The device includes a liquid ammonia tank, an ammonia liquid separator and a carbon dioxide condenser. The liquid ammonia in the liquid ammonia tank is transported to the ammonia liquid separation through a first pipeline through a regulating valve. At the bottom of the ammonia liquid separator, the liquid ammonia is transported to the bottom of the carbon dioxide condenser through the second pipeline; the liquid ammonia in the carbon dioxide condenser is transported to the ammonia liquid separator through the third pipeline The middle inlet valve of the ammonia liquid separator chamber; the ammonia gas in the upper part of the ammonia liquid separator chamber is transported to the inlet of the refrigeration compressor through the fourth pipeline, and is circulated back to the liquid ammonia tank through the evaporative condenser in turn; the carbon dioxide condenser is set inside There is an aluminum finned plate heat exchanger, gaseous carbon dioxide enters the aluminum finned plate heat exchanger from the upper pipe, and comes out from the lower pipe after condensation. The integrated equipment occupies a small space and has a high conversion rate of cooling capacity, which can ensure the stability of the liquid level and prevent overheating and boiling.

Description

technical field [0001] The proposal belongs to the technical field of refrigeration, and specifically relates to a carbon dioxide liquefaction device. Background technique [0002] The volume of the existing carbon dioxide liquefaction device is relatively large, which reduces the space utilization rate. The installation methods are all arranged in a plane, which does not fully save space, and the conversion rate of cooling capacity is not high. 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 wil...

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

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