Method for reducing carbon dioxide discharge amount in food-grade liquid carbon dioxide product production

Abstract

The invention relates to a carbon dioxide production method and especially relates to a method for reducing a carbon dioxide discharge amount in food-grade liquid carbon dioxide product production. The method comprises the following steps of 1, a denitrification process, 2, a first compression process, 3, a desulfuration process, 4, a dealkylation process, 5, a purification process, 6, a second compression process, 7, a liquefaction process, and 8, a distillation purification process. The method can greatly reduce a carbon dioxide discharge amount.

Description

technical field [0001] The present invention generally relates to a production method of food-grade liquid carbon dioxide, in particular to a method for reducing carbon dioxide emissions in the production of food-grade liquid carbon dioxide products. Background technique [0002] figure 2 Show a kind of flow process of the production method of food-grade liquid carbon dioxide product, comprise the following steps: [0003] (1) Denitrification process 10 [0004] The air separation and purification tower dry air from outside the boundary area that does not contain impurities such as mechanical water, acetylene and hydrocarbons enters the denitrification tower from the bottom of the denitrification tower 11 of the denitrification process 10 through the adjustment of the regulating valve 2 controlled by the orifice flowmeter 1 In 11, it is in full contact with the zeolite molecular sieve in the tower, the nitrogen in the dry air is absorbed by the zeolite molecular sieve, and...

AI Technical Summary

Problems solved by technology

Since the required amount of combined gas flow for heating and desorbing impurities and the required amount for cooling the adsorbent are respectively introduced into the purifier in the state of heating and desorbing impurities and in the purifier in the state of cooling the adsorbent against the direction of adsorption Obviously, a large amount of carbon dioxide in the combined gas flow used for heating and desorbing impurities and a large amount of carbon dioxide in the combined gas flow used for cooling the adsorbent are wasted, and it is more harmful to the surrounding environment. severe pollution

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