Device and method for combined recovery of carbon dioxide, nitrogen and oxygen in flue gas

A carbon dioxide, nitrogen technology, applied in chemical instruments and methods, oxygen/ozone/oxide/hydroxide, carbon compounds, etc., can solve the problems of difficult separation and low enrichment of nitrogen and oxygen

Pending Publication Date: 2019-08-16
林千果
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a combined recovery device and method for carbon dioxide, nitrogen a...

Method used

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  • Device and method for combined recovery of carbon dioxide, nitrogen and oxygen in flue gas
  • Device and method for combined recovery of carbon dioxide, nitrogen and oxygen in flue gas

Examples

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Embodiment 1

[0070] A steel plant flue gas is tested, and the balance calculation of the present invention figure 1 The device shown in is for low concentrations of CO in the flue gas 2 Process capture and treatment effects for oxygen and nitrogen recovery.

[0071] Among them, hollow fiber membranes made of organic membrane materials are used in the carbon dioxide membrane separation unit; in the step of nitrogen pressure swing adsorption separation, the process conditions are as follows: the treatment temperature is 30 degrees Celsius, the treatment pressure is 0.47MPa (A), and the adsorbent is carbon molecular sieve.

[0072] The material balance results are shown in Table 1:

[0073] Table 1

[0074]

[0075] From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects: as can be seen from Table 1, when the gas flow rate of the blast furnace flue gas processed is 10000Nm 3 / h, CO 2 Content...

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Abstract

The invention provides a device and method for combined recovery of carbon dioxide, nitrogen and oxygen in flue gas. The device comprises a first CO2 membrane separation unit, an N2 pressure swing adsorption separation unit and a second CO2 membrane separation unit, wherein a flue gas inlet, a first carbon dioxide enriched gas outlet and a first high pressure non-infiltrating gas outlet are formedin the first CO2 membrane separation unit, a first high pressure non-infiltrating gas inlet, a nitrogen enriched gas outlet and a nitrogen-removed gas outlet are formed in the N2 pressure swing adsorption separation unit, and the first high pressure non-infiltrating gas inlet is connected with the first high pressure non-infiltrating gas outlet; and a nitrogen-removed gas inlet, a second carbon dioxide enriched gas outlet and an oxygen enriched gas outlet are formed in the second CO2 membrane separation unit, and the nitrogen-removed gas inlet is connected with the nitrogen-removed gas outlet. When the device is used for treating the flue gas, the degree of enrichment of carbon dioxide is high, nitrogen and oxygen in the flue gas can be separated simultaneously, and meanwhile resource recovery of carbon dioxide, nitrogen and oxygen in the flue gas can be realized.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a combined recovery device and method for carbon dioxide, nitrogen and oxygen in flue gas. Background technique [0002] Global warming is one of the major environmental problems in the world at present. Among the various greenhouse gases that cause climate change, carbon dioxide (CO 2 ) has the greatest impact on global warming, controlling CO 2 Emission has become one of the important technical routes to deal with climate warming. CO in combustion flue gas 2 The emission has the characteristics of low concentration, stability, concentration and large volume, and is a large-scale CO emission reduction 2 one of the best fields. At the same time, the flue gas also contains a large amount of nitrogen (N 2 ) and a concentration of 8% oxygen (O 2 ), the concentration is lower than that of nitrogen and oxygen in the air, so it is difficult to use. [0003] high purit...

Claims

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Application Information

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IPC IPC(8): C01B32/50C01B21/04C01B13/02B01D53/22B01D53/047
CPCC01B32/50C01B21/0433C01B13/0248B01D53/229B01D53/226B01D53/225B01D53/047B01D2258/0283C01B2210/001C01B2210/0014C01B2210/0043C01B2210/0062Y02C20/40Y02P20/151
Inventor 林千果
Owner 林千果
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