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Efficient and energy-saving system for rectifying and purifying carbon dioxide

A carbon dioxide, high-efficiency and energy-saving technology, applied in the fields of fractionation, inorganic chemistry, chemical industry, etc., can solve the problems of complex carbon dioxide purification process and large equipment investment, and achieve the effect of saving workload, saving investment cost and shortening the process route

Active Publication Date: 2017-01-25
LANZHOU YULONG GAS
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Problems solved by technology

[0008] The invention provides a high-efficiency and energy-saving rectification and purification system for carbon dioxide, which solves the problems of complex and large equipment investment in the existing carbon dioxide purification process

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  • Efficient and energy-saving system for rectifying and purifying carbon dioxide

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0026] Such as figure 1 As shown, this embodiment provides a high-efficiency and energy-saving distillation and purification system for carbon dioxide. According to the carbon dioxide distillation and purification process, it includes a drying adsorption tower, a liquefier 4, and a purification tower 5 connected in sequence, and also includes a regenerative electric heater 6 and a heat exchange Device 7, the regenerative electric heater ...

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Abstract

The invention discloses an efficient and energy-saving system for rectifying and purifying carbon dioxide, and belongs to the technical field of chemical engineering equipment. According to a carbon dioxide rectifying and purifying process, the system comprises a drying adsorption tower, a liquefier and a purifying tower which are connected in sequence, and further comprises a renewable electric heater and a heat exchanger, wherein the renewable electric heater is connected with a noncondensable gas discharging pipe at the top of the purifying tower; a high-temperature renewable gas pipe of the renewable electric heater and a gas outlet pipe of the drying adsorption tower are respectively connected with the heat exchanger; an outlet of the heat exchanger is connected with a heating coiled pipe at the bottom of the purifying tower; a gas outlet of the heating coiled pipe is connected with a gas inlet of the liquefier. The carbon dioxide rectifying and purifying system simplifies a de-hydrocarbon procedure, i.e. three sets of equipment for de-hydrocarbon are all eliminated; hydrocarbon impurities and nonconcensable gas such as nitrogen and oxygen are removed together in the purifying tower; meanwhile, inside and outside of a liquid phase part of the purifying tower are indirectly heated, so that the carbon dioxide purifying efficiency is improved.

Description

Technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a system for high-efficiency and energy-saving distillation and purification of carbon dioxide. Background technique [0002] Existing carbon dioxide purification method: the carbon dioxide raw material gas with a content of ≥96% is compressed and boosted, water removal, desulfurization, dehydrocarbonization, drying, liquefaction, rectification, subcooling, storage and other processes, and the final product liquid carbon dioxide reaches all indicators National food grade carbon dioxide standard. Among them, all existing de-hydrocarbon technologies use high-temperature catalytic oxidation combustion to remove methane, ethane, propane, benzene and other hydrocarbons from carbon dioxide. [0003] The disadvantages of the existing de-hydrocarbon methods are: [0004] Three sets of equipment, preheater, dehydrocarbonizer, and cooler are needed, worth about 1 million. [0005] The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/50B01D3/14
CPCB01D3/14C01P2006/80Y02P20/10
Inventor 王小波尹爱华张森杜月平陈永纲
Owner LANZHOU YULONG GAS
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