Carbon dioxide recovery system

Abstract

The invention discloses a carbon dioxide recovery system, and relates to the recovery and purification of carbon dioxide gas in fermentation gas in a winery. The system comprises a gas pretreatment unit, a compression unit, a purifying and drying unit, a refrigerating and condensing unit, a storage unit, a vaporizing and purifying unit and an electronic control unit which are connected in turn, wherein a foam detection sensor is arranged in a demister; a valve is arranged between the demister and an air sac; a heating device is arranged in the storage unit; the top of the storage unit is provided with a pipeline for making liquid carbon dioxide flow to the bottom of the storage unit; the vaporizing and purifying unit is divided into a relatively high purity unit and a high purity unit; and one part of coarse liquid carbon dioxide in the storage unit enters the relatively high purity unit through a vaporizer, and the other part of the coarse liquid carbon dioxide is purified under the action of a purifying filler and enters the high purity unit through the vaporizer. The recovery system ensures high purity of the recovered carbon dioxide and has low energy consumption.

Description

technical field [0001] The invention relates to the recovery and purification of carbon dioxide gas in the fermented gas of winery, so that the recovered carbon dioxide is suitable for production in various industries. Background technique [0002] In the production of wine manufacturing and other fermented food industries, a large amount of fermentation gas will be produced, and carbon dioxide gas, as a common raw material in industrial production, has high application value; The lack of environmental protection often directly discharges the fermentation gas into the atmosphere, which not only causes serious pollution to the environment, but also aggravates the greenhouse effect; at the same time, it also greatly wastes the use value of carbon dioxide and energy. [0003] For this reason, people began to consider the recovery and purification of carbon dioxide gas produced in the fermentation industry. There are many researches in this area at home and abroad, such as Haffm...

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Problems solved by technology

[0002] In the production of wine manufacturing and other fermented food industries, a large amount of fermentation gas will be produced, and carbon dioxide gas, as a common raw material in industrial production, has high application value; The lack of environmental protection often directly discharges the fermentation gas into the atmosphere, which not only causes serious pollution to the environment, but also aggravates the greenhouse effect; at the same time, it also greatly wastes the use value of carbon dioxide and energy.

[0003] For this reason, people began to consider the recovery and purification of carbon dioxide gas produced in the fermentation industry. There are many researches in this area at home and abroad, such as Haffmans Company in the Netherlands and Orlando Company in China. They have also designed various recovery systems. However, there are more or less certain defects in these systems, which are mainly reflected in the following points: 1) when the fermented gas is pretreated, the foam in the fermented gas cannot be treated. The foam is cleaned, so that the foam enters the next unit, which has a great impact on the work of the equipment in the next unit, and also has a great impact on the quality of carbon dioxide recovery, resulting in some recycled gas being unusable, which is a great deal invisibly The cost of recovery is greatly increased, which is very detrimental to the economic benefits of the enterprise; at the same time, if the recovered unqualified gas is directly discharged into the atmosphere, it will cause serious pollution to the environment and lack social effects; 2) In low-purity units, all need Using external auxiliary thermal energy equipment to provide reboil energy, the energy consumption is relatively large; 3) The purity of the extracted carbon dioxide gas is not too high, and it cannot be used in some industries that require high-purity carbon dioxide

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