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A process for separating and recovering carbon dioxide from industrial tail gas

A carbon dioxide and industrial exhaust gas technology, applied in separation methods, dispersed particle separation, educts, etc., can solve the problems of high compression power consumption, not reducing operating energy consumption, etc., to reduce energy consumption, reduce operating costs, and reduce heat consumption. Effect

Active Publication Date: 2015-10-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above process reduces the heat energy consumption to a certain extent, there are still problems such as high compression power consumption in steam recompression, multi-stage compression and other processes, and the overall operation energy consumption has not been reduced.

Method used

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  • A process for separating and recovering carbon dioxide from industrial tail gas

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a process for separating and recovering carbon dioxide from industrial tail gas includes absorption tower 1 and desorption tower 2, and the specific process steps are:

[0034]1) The pretreated industrial tail gas enters the bottom of the absorption tower 1, flows upwards in the absorption tower, and contacts with the absorption liquid entering from the top of the absorption tower 1 countercurrently, and the carbon dioxide is absorbed by the absorption liquid to obtain a rich liquid; The carbon tail gas is directly discharged from the top of the absorption tower 1; the absorption liquid is a monoethanolamine solution with a mass concentration of 20%-50%, and the temperature of the absorption liquid is 30°C-50°C;

[0035] 2) The rich liquid passes through the rich liquid pump 3 and then is divided into two parts by the flow divider 4, the first rich liquid and the second rich liquid, wherein the molar percentage of the second rich liquid in th...

Embodiment 2

[0042] Other processes are the same as in Example 1, when the compressor pressure change is 40KPa, the minimum total operating energy consumption is 0.365 GJ / t CO 2 , compared with the traditional process, reduced by 34.2%.

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Abstract

The present invention disclosed a process that is separated from the industrial exhaust gas to recycle carbon dioxide. It mainly uses the highly integrated means of energy -heat pump distillation technology.The absorbing solution is contacted to get the rich liquid; the liquid liquid is divided into two shares through the downturn after the liquid pump.Enter the solution tower and absorb, and the carbon dioxide with a small amount of water steam is discharged from the top of the suction tower with a small amount of water steam.use.This process is based on the traditional carbon dioxide capture process, integrates diverting and absorbing and heat pump distillation process, and effectively uses the steam potential heat of the pagoda to reduce the energy consumption during the system operation.Carbon dioxide products reduce greenhouse gas emissions.

Description

technical field [0001] The invention relates to industrial tail gas purification and carbon dioxide capture and recycling technologies, in particular to a process for separating and recovering carbon dioxide from industrial tail gas. Background technique [0002] With the increase of human industrial activities, a large amount of fossil fuels (oil, natural gas, coal) have been used, which has promoted the rapid development of the world economy, but has caused energy shortages and increasingly serious ecological and environmental problems. Energy is the lifeblood of the world's economic development, and fossil fuels play a dominant role in energy utilization. The burning of fossil fuels is currently the largest source of atmospheric environmental pollution and the largest source of carbon dioxide greenhouse gas emissions. Therefore, in order to control carbon dioxide emissions, carbon dioxide capture technology can be integrated into industrial production to capture and sepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/60C01B31/20C01B32/50
CPCY02A50/20Y02P20/129Y02P20/151
Inventor 梁志武高红霞童柏栋那艳清
Owner HUNAN UNIV
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