CN-224215694-U - Carbon dioxide liquefying and refining system

CN224215694UCN 224215694 UCN224215694 UCN 224215694UCN-224215694-U

Abstract

A carbon dioxide liquefying and refining system. The simple compression-cooling mode needs to achieve higher pressure and lower temperature, which has higher requirements on equipment and higher energy consumption. The utility model comprises an adsorption purification tower, a filter, a first carbon dioxide refrigerator and a second carbon dioxide refrigerator, wherein a carbon dioxide pipeline from the filter of the drying tower is divided into two paths, one path is communicated with the first carbon dioxide refrigerator, the other path is communicated with the adsorption purification tower, the outlet of the adsorption purification tower is communicated with the inlet of the filter through the pipeline, the outlet of the filter is communicated with the inlet of a reboiler through the pipeline, the outlet of the reboiler is communicated with the inlet of the second carbon dioxide refrigerator through the pipeline, the outlet of the second carbon dioxide refrigerator is communicated with the inlet of the middle part of the purification tower through the pipeline, and the tower bottom of the purification tower is communicated with a subcooler through the pipeline. The utility model is used for liquefying and refining carbon dioxide.

Inventors

FANG JIALE
SHEN CHENGCHENG
Lun Yiyang
HUANG QINGHAO
WU GEYANG
WANG GUOQIANG
SUN HONGZHI

Assignees

广东大唐国际雷州发电有限责任公司

Dates

Publication Date: 20260508
Application Date: 20250623

Claims (2)

1. A carbon dioxide liquefying and refining system is characterized by comprising an adsorption purification tower, a filter, a first carbon dioxide refrigerator and a second carbon dioxide refrigerator, wherein a carbon dioxide pipeline from a filter of a drying tower is divided into two paths, one path is communicated with the first carbon dioxide refrigerator, the other path is communicated with the adsorption purification tower, an outlet of the adsorption purification tower is communicated with an inlet of the filter through a pipeline, an outlet of the filter is communicated with an inlet of a reboiler through a pipeline, an outlet of the reboiler is communicated with an inlet of the second carbon dioxide refrigerator through a pipeline, an outlet of the second carbon dioxide refrigerator is communicated with an inlet in the middle of a purification tower through a pipeline, and a tower kettle of the purification tower is communicated with a supercooler through a pipeline.
2. The system of claim 1, wherein the first and second carbon dioxide refrigerators are screw refrigeration units.

Description

Carbon dioxide liquefying and refining system Technical Field The utility model relates to a carbon dioxide liquefying and refining system. Background Carbon dioxide is a gas widely existing in nature, and is largely produced in the processes of industrial production, energy utilization and the like. It has the characteristics of low critical temperature (about 31.1 ℃) and high critical pressure (about 7.38 MPa), and the like, and usually exists in a gaseous state at normal temperature and pressure, but can be liquefied by means of pressurization, cooling and the like. This liquefaction characteristic makes carbon dioxide of great application value in many fields, such as refrigeration, chemical industry, food, etc. In the past, for liquefaction of general gases, compression-cooling methods have been often employed. However, conventional liquefaction techniques have some limitations with respect to carbon dioxide, a gas having certain critical parameters. For example, a simple compression-cooling approach requires higher pressures and lower temperatures, which requires higher equipment requirements and greater energy consumption. In addition, in the liquefaction process, problems such as impurity mixing, low liquefaction efficiency and the like are easy to occur, and the subsequent refining process is influenced. With the increasing environmental awareness and the limitation of greenhouse gas emissions, the recycling and utilization of carbon dioxide is receiving increasing attention. The liquefied and refined carbon dioxide can be stored and transported more conveniently, and is convenient for the application in the fields of subsequent chemical synthesis, food preservation and the like. Meanwhile, impurities such as moisture, oxygen, hydrocarbons and the like in the carbon dioxide can be removed through refining, so that the purity of the carbon dioxide can be improved, and the requirements of different application fields on the quality of the carbon dioxide can be met. In order to meet the requirements of high-purity and high-quality carbon dioxide in industrial production and gas application, the invention can produce qualified carbon dioxide by a carbon dioxide liquefying and refining system. Disclosure of utility model The utility model aims to make up the defects of the prior art and provides a carbon dioxide liquefying and refining system. The above object is achieved by the following technical scheme: A carbon dioxide liquefying and refining system comprises an adsorption purification tower, a filter, a first carbon dioxide refrigerator and a second carbon dioxide refrigerator, wherein a carbon dioxide pipeline from a filter of a drying tower is divided into two paths, one path is communicated with the first carbon dioxide refrigerator, the other path is communicated with the adsorption purification tower, an outlet of the adsorption purification tower is communicated with an inlet of the filter through a pipeline, an outlet of the filter is communicated with an inlet of a reboiler through a pipeline, an outlet of the reboiler is communicated with an inlet of the second carbon dioxide refrigerator through a pipeline, an outlet of the second carbon dioxide refrigerator is communicated with an inlet in the middle of a purification tower through a pipeline, and a tower kettle of the purification tower is communicated with a subcooler through a pipeline. The first carbon dioxide refrigerator and the second carbon dioxide refrigerator are screw refrigerating units. Advantageous effects 1. The utility model can produce qualified carbon dioxide through a simple and effective carbon dioxide liquefaction and refining system, one set of the two sets of the liquefaction units is an industrial carbon dioxide liquefaction unit, the industrial carbon dioxide liquefaction unit is converted into carbon dioxide liquid for storage through compression refrigeration, and the other set of the industrial carbon dioxide liquefaction unit is a food-grade carbon dioxide liquefaction unit, and the food-grade carbon dioxide liquid is prepared through purification, filtration, reboiling, refrigeration, purification and supercooling, so that the requirements of different application scenes are met. Drawings FIG. 1 is a schematic diagram of the present utility model; in the figure, 1, an adsorption purification tower, 2, a filter, 3, a first carbon dioxide refrigerator, 4, a second carbon dioxide refrigerator, 5, a reboiler, 6, a purification tower, 7 and a subcooler. Detailed Description Referring to FIG. 1, the carbon dioxide liquefying and refining system comprises an adsorption purification tower 1, a filter 2, a first carbon dioxide refrigerator 3 and a second carbon dioxide refrigerator 4, wherein a carbon dioxide pipeline from a filter of a drying tower is divided into two paths, one path is communicated with the first carbon dioxide refrigerator, the other path is communicated with the adsorption purification tower, an