Ultrasonic reinforced membrane reactor for absorbing and gathering CO2 in flue gas

Abstract

The invention belongs to the technical field of membrane separation, and relates to an ultrasonic reinforced membrane reactor for absorbing and gathering CO2 in flue gas, which comprises an ultrasonic membrane separator, a desorption device and an absorption liquid delivery pump. An ultrasonic membrane contactor is connected with the desorption device, the desorption device is used for desorption of absorption liquid flowing from the ultrasonic membrane contactor, the desorbed absorption liquid is delivered back to the ultrasonic membrane separator through the absorption liquid delivery pump, and the ultrasonic membrane separator comprises an ultrasonic container, an ultrasonic generation system, a membrane module, a first heater, a temperature controller and a temperature sensor, wherein the ultrasonic container is used for containing the absorption liquid, the membrane module is positioned in the ultrasonic container, the temperature sensor is used for detecting the temperature of the absorption liquid, and temperature signals generated by the temperature sensor are transmitted to the temperature controller. The ultrasonic reinforced membrane reactor for absorbing and gathering the CO2 in the flue gas has the advantages that membrane mass transfer efficiency is greatly enhanced, and the difference among absorption effects of different unit membrane areas is avoided.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and relates to a method suitable for absorbing and capturing CO in flue gas. 2 membrane contact reactor. Background technique [0002] As we all know, the atmospheric greenhouse effect is the biggest environmental problem that mankind is currently facing. Of all the gases that produce the greenhouse effect (the 6 major greenhouse gases: CO 2 、CH 4 , N 2 O. HFCs S 、PFC S , SF 6 ), CO 2 The largest contribution to the greenhouse effect, accounting for about 55%. Therefore, controlling CO 2 Emissions are key to mitigating the greenhouse effect. Thermal power plants are CO 2 of concentrated emission sources, whose CO 2 Emissions as a share of anthropogenic CO 2 38% of total emissions. [0003] Currently, efforts are being made to recover CO from combustion exhaust 2 The technologies mainly include physical adsorption method, physical absorption method, chemical absorption m...

AI Technical Summary

Problems solved by technology

Although the physical adsorption method is simple in process operation and uses a dry system, it can ignore the corrosion problem. The operation is simple and easy to realize automation, but CO 2 The recovery rate is low, and a large amount of adsorbent is required, and the adsorption and desorption are frequent; the physical absorption method generally has a large absorption capacity, and the absorption and utilization amount is small, and the regeneration of the absorbent does not require heating, but it is only suitable for CO 2 The condition of high partial pressure of gas, CO 2 Although the chemical absorption method has been applied in industry, it still has certain limitations. Due to the direct contact of gas and liquid, bubbles and entrainment appear in the absorption tower. The flue gas purification system is complicated, and energy consumption and investment They are all very large; membrane separation methods are divided into gas membrane separation methods and membrane contactor methods according to different separation mechanisms

At present, the membrane contactor method is mainly used, which combines the high selectivity of the chemical absorption method and the equipment compactness of the gas separation membrane method to achieve efficient separation of CO 2 The purpose of this method, but the disadvantage of this method is that it is difficult to package and has high requirements for components, thus limiting its application in industry

Images