A synthesis gas component separation and recovery device and method

Abstract

The invention discloses a synthesis gas component separation and recovery device and a method. The device comprises a compression mechanism, a deep cooling mechanism and a film separation mechanism, wherein the compression mechanism is used for receiving permeation gas conveyed by the film separation mechanism, compressing the pressure of the permeation gas to the same one grade with raw material gas and mixing the permeation gas with the raw material gas to convey to the deep cooling mechanism; the deep cooling mechanism is used for receiving mixed gas from the compression mechanism, separating and recovering carbon dioxide gas therein and exhausting hydrogen-enriched gas; and the film separation mechanism is used for receiving the hydrogen-enriched gas from the deep cooling mechanism and further separating hydrogen and carbon dioxide in the gas to obtain residual permeation gas with higher hydrogen purity and permeation gas with more carbon dioxide. Through coordinated work of the compression mechanism, the deep cooling mechanism and the film separation mechanism, the device can efficiently recover hydrogen and carbon dioxide in synthesis gas, and obtains high recovery rate under the condition of low-energy-consumption recovery.

Description

technical field [0001] The invention belongs to the field of synthesis gas treatment, and in particular relates to a device and method for separating and recovering components of synthesis gas. Background technique [0002] In the process of synthesis gas production and preparation, due to the different sources of raw materials and processing techniques, the synthesis gas obtained by the reaction contains a large amount of impurity gases (carbon dioxide, hydrogen sulfide, nitrogen, etc.) in addition to hydrogen. From the perspective of purifying hydrogen, controlling greenhouse gas emissions, and reducing acid gas corrosion to subsequent equipment, the synthesis gas must be separated to prepare the required products and ensure the safety of downstream processes and products. [0003] The compression condensation method is a traditional gas separation method, which uses the difference in dew point of each component in the raw gas to partially liquefy it by pressurization and ...

AI Technical Summary

Problems solved by technology

However, the compression condensation method mainly has the following disadvantages: long start-up time, poor flexibility, and high energy consumption

The disadvantage is that the absorbent needs to be regenerated, the energy consumption is relatively large, and the absorbent needs to be continuously replenished, and the operation is relatively complicated.

[0008] Although the above method can realize the H in the syngas 2 Separation and recovery of other components, but there are generally disadvantages such as complicated operation, high energy consumption, and inflexible treatment.

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