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Device and method for inhibiting corrosion of membrane separation carbon dioxide trapping process

A carbon dioxide and corrosion device technology, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as compressor failure, compressor corrosion, and system water imbalance, so as to inhibit process corrosion and eliminate collection of effects

Active Publication Date: 2021-04-02
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The membrane separation method in the current carbon dioxide capture technology, the flue gas severely corrodes the compressor, causing the compressor to not work normally, and thus the device cannot run stably for a long period of time
In addition, the system needs to achieve the purpose of wetting the membrane module through continuous water replenishment, and since continuous water replenishment will cause water imbalance in the system, the process water must be discharged outside regularly, which will cause environmental protection such as discharge, collection and treatment of process wastewater. question

Method used

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  • Device and method for inhibiting corrosion of membrane separation carbon dioxide trapping process

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Comparison scheme
Effect test

Embodiment 1

[0035] The method of this embodiment is implemented according to the following steps:

[0036] The carbon dioxide capture performance evaluation test is carried out using the device in the attached figure. After the raw gas is sent into the system by the blower, it is directly compressed by the compressor and then enters the membrane separator for carbon dioxide capture.

[0037] The raw material gas is simulated flue gas, the temperature is 40°C, the pressure is 0.2MPa, the moisture is saturated, and the dry basis content is CO 2 is 12v%, O 2 is 8v%, N 2 is 80v%.

[0038] Test result: CO 2 The capture rate is 58%, and the product gas CO 2 The purity is 70%, and the system drains 22L.

Embodiment 2

[0040] The method of this embodiment is implemented according to the following steps:

[0041] The carbon dioxide capture performance evaluation test was carried out using the device in the attached drawing. After the feed gas was sent into the system by the blower, it first avoided the compressor and directly entered the membrane separator to wet the membrane module, and at the same time the flue gas was dehydrated; then the dehydrated The flue gas is sent to the compressor, and the compressor is pressurized and then enters the membrane separator for carbon dioxide capture.

[0042] The raw material gas is simulated flue gas, the temperature is 40°C, the pressure is 0.2MPa, the moisture is saturated, and the dry basis content is CO 2 is 12v%, O 2 is 8v%, N 2 For 80v%, the wetting time of the flue gas entering the membrane separator is 30 minutes.

[0043] Test result: CO 2 Capture rate 55%, product gas CO 2 The purity is 73%, and the system drains 8L.

Embodiment 3

[0045] The method of this embodiment is implemented according to the following steps:

[0046] The carbon dioxide capture performance evaluation test was carried out using the device in the attached drawing. After the feed gas was sent into the system by the blower, it first avoided the compressor and directly entered the membrane separator to wet the membrane module, and at the same time the flue gas was dehydrated; then the dehydrated The flue gas is sent to the compressor, and the compressor is pressurized and then enters the membrane separator for carbon dioxide capture.

[0047] The raw material gas is simulated flue gas, the temperature is 40°C, the pressure is 0.2MPa, the moisture is saturated, and the dry basis content is CO 2 is 12v%, O 2 is 8v%, N 2 is 80v%, and the wetting time of flue gas entering the membrane separator is 60 minutes.

[0048] Test result: CO 2 The capture rate is 52%, and the product gas CO 2 The purity is 77%, and the system drains 2L.

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Abstract

The invention belongs to the technical field of gas separation, and relates to a device and method for inhibiting corrosion of a membrane separation carbon dioxide trapping process. The method utilizes the water absorption of a membrane component, and enables flue gas to avoid a compressor and directly enter a membrane separator to wet the membrane component by additionally arranging a pipeline and a valve, thereby achieving the purpose of flue gas dehydration; and dehydrated flue gas is recycled to enter the compressor to be compressed and then enters the membrane separator again, and finally, the carbon dioxide in the flue gas is captured by a membrane separation method. According to the method provided by the invention, the problem of corrosion of the flue gas to the compressor in the traditional membrane separation process can be remarkably reduced, and meanwhile, the saturated water in the flue gas is used for wetting the membrane module, so that the step of supplementing processwater into the system is reduced, the discharge of process wastewater is further reduced, and the environmental protection problems of wastewater collection, treatment and the like are avoided. The method has a good application prospect in the technical field of flue gas carbon dioxide capture.

Description

technical field [0001] The invention belongs to the technical field of gas separation, and relates to a device and method for inhibiting membrane separation and capturing carbon dioxide process corrosion. Background technique [0002] Carbon dioxide is the main greenhouse gas in the atmosphere. With the development of global industrialization, the emission of CO2 is increasing year by year. The 2011 International Energy Outlook report pointed out that from 2008 to 2035, world energy consumption will increase by 53%, and global CO2 emissions due to coal combustion will increase from 9G tons per year in 2000 to 2050. 32G tons / year. In order to effectively reduce CO2 emissions, carbon dioxide capture measures will play a vital role in controlling carbon emissions. At present, carbon dioxide capture technologies mainly include membrane separation, absorption separation, adsorption separation, chemical cycle combustion, low temperature distillation, etc. . Among them, the memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22
CPCB01D53/226B01D2257/504B01D2053/221Y02C20/40
Inventor 黄汉根毛松柏郭本帅陈曦汪东叶宁季燕杨继
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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