Method for eliminating CO in restricted space through ultrasonic atomizing spray of chemical absorbing solution

Abstract

A method for eliminating CO in a restricted space through ultrasonic atomizing spray of a chemical absorbing solution belongs o a chemical absorption method of ultrasonic atomizing spray. An ultrasonic atomizing device is combined with the chemical absorption method to achieve the purpose of rapid and effective reduction of the concentration of CO in the restricted space. A CuCl / MgCl2 mixed solution for efficiently absorbing CO at normal temperature under normal pressure is selected, compressed air is used to impact a resonant cavity to generate ultrasonic waves in order to atomize the mixed solution into dense fine fog droplets with the diameter being 50 [mu] or less, and the fog droplets suspend in air for a long time to increase the solution and air contact area and guarantee the absorption efficiency of the chemical absorbing solution. The device can reduce the CO concentration to 20 ppm or less from 400 ppm within 20 min and keep the CO concentration below 20 ppm within 120 h. Thedevice has the advantages of mild application conditions, simplicity in storage, safety, non-toxicity, and meeting of needs of sustainable development. Additionally, the device also has the characteristics of simplicity in operation, low cost, lightness and portability, and provision of a good support for purifying gas in mine rescue capsules, refuge chambers, subway traffic and other restrictedspaces.

Description

technical field [0001] The invention relates to a chemical absorption method of ultrasonic atomization and spraying, in particular to a method for eliminating CO in a confined space by ultrasonic atomization and spraying of a chemical absorption liquid. Background technique [0002] Due to the limited gas exchange with the outside world in confined spaces, it is easy to accumulate a large amount of toxic and harmful gases. Among them, excessive CO concentration will not only directly cause casualties, but also cause explosions if the concentration reaches a certain level. In workplaces such as mines and garbage dumps, excessive CO limits safe production. In addition, the use of mine rescue facilities such as rescue cabins and refuge chambers is also limited. CO gas, due to its stable chemical properties, is almost insoluble in all solvents, and its purification research has always been a difficult problem in the industry. [0003] Existing CO purification technologies mainl...

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Problems solved by technology

Among them, the catalytic oxidation method faces the problems of easy catalyst poisoning, harsh reaction conditions, and high cost of precious metal catalysts; the adsorption method has limited absorption effect and high maintenance costs; the deep well method requires high energy consumption, complicated operation, and high equipment and operating costs

When these methods are applied to the purification of low concentration CO in confined spaces, the purification effect is not satisfactory.

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