Use method of molecular sieve combination in waste gas purification and molecular sieve combination

Abstract

The invention discloses a use method of a molecular sieve combination in waste gas purification and a molecular sieve combination. The molecular sieve combination comprises a porous structure carrierand a plurality of molecular sieve material layers. The pore space of the molecular sieve combination endows the molecular sieve combination with a first specific surface area, and the use method includes: when the plurality of molecular sieve material layers attached to the porous structure carrier reach adsorption saturation, coating the surface of the molecular sieve combination with a new molecular sieve material layer, measuring a second specific surface area endowed by the pore space of the molecular sieve combination at the moment, further conducting purification adsorption on waste gas, and repeating the adsorption and coating steps, when the ratio of the second specific surface area to the first specific surface area reaches a preset value, stopping coating new molecular sieve material layer, and conducting molecular sieve desorption treatment. The invention also provides the molecular sieve combination used in the method. The method provided by the invention can greatly simplify the operation and save energy sources without affecting the adsorption capacity basically.

Description

technical field [0001] The invention belongs to the field of organic waste gas treatment, and in particular relates to a method for using a molecular sieve assembly in purifying waste gas and the molecular sieve assembly. Background technique [0002] The emission of volatile organic compounds (VOCs) from industrial sources involves many industries and has a significant impact on air quality. With the development of my country's economy, VOCs pollution has become an important precursor of air pollution in key urban agglomerations and key areas in my country. One, the currently commonly used adsorbents for VOCs purification mainly include activated carbon, activated carbon fiber, molecular sieve and silica gel. Among them, molecular sieves have been used more and more in the purification of VOCs due to their regular pore structure, large specific surface area, excellent stability, high activity and ion exchange properties. [0003] Molecular sieves are mostly in the form of p...

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Problems solved by technology

[0003] Molecular sieves are mostly in the form of powder or granules, and need to be attached to the carrier through adhesives, etc., so as to form a higher specific surface area, so that the molecular sieve can have a larger contact area with the adsorbed substance. The molecular sieve in the prior art is attached After being on the carrier, it must be reused after desorption only after the adsorption is saturated. The desorption process is more troublesome and the economic benefit is not high. In the existing technology, the carrier mostly uses ceramic honeycomb, which is relatively expensive, and requires a lot of manpower and material resources for handling and handling, and it is also more troublesome to coat molecular sieve materials.