A vocs processing intelligent coupling device and method

Abstract

The invention discloses an intelligent coupling device and method for VOCs treatment. The system comprises a waste gas collection unit, a pretreatment unit, a refrigeration unit, a condensation unit,a condensate recovery unit, a catalytic oxidation unit, an intelligent calculation module and a chimney discharge module, the waste gas collection unit, the pretreatment unit, the condensation unit and the catalytic oxidation unit are sequentially connected, the condensation unit is connected with the refrigeration unit and the condensate recovery unit, the condensation unit and the catalytic oxidation unit are both connected with the chimney discharge module, and the condensation unit is connected with the chimney discharge module through a bypass pipe. Compared with traditional condensationand catalytic oxidation devices and methods, the device and the method of the invention solve the problems of mismatching of device cooling capacity caused by large fluctuation of waste gas quantity and concentration, frequent overtemperature bypass discharge of the catalytic oxidation unit and high energy consumption caused by frequent fuel or heat supplement of the catalytic oxidation unit due to insufficient heat value.

Description

technical field [0001] The invention relates to the technical field of VOCs processing, in particular to an intelligent coupling device and method for VOCs processing. Background technique [0002] Industries that emit volatile organic pollutants VOCs include petrochemicals, fine chemicals, spraying, packaging and printing, pharmaceutical and pesticide manufacturing, semiconductor and electronic product manufacturing, wood-based panels and wooden furniture manufacturing, leather, enameled wire, shoemaking, coatings, Ink, adhesive production, metal casting, etc. There are many industries, and the VOCs produced in each industry are various and complex in composition. The common components are hydrocarbons, benzene series, alcohols, ketones, phenols, aldehydes Classes, esters, amines, nitriles (cyanides), etc. [0003] There are two main types of VOCs governance technologies: one is recycling technology, and the other is destruction technology. Recovery technology is a method...

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Problems solved by technology

[0004] Organic chemical products are loaded and unloaded at vehicle and ship terminals. During the loading and unloading process, a large amount of VOCs waste gas will be generated, and the storage, transportation, loading and unloading process is not continuous, and the amount of oil and gas produced by different loading and unloading volumes is different. The gas volume and concentration of these waste gases fluctuate greatly. , which brings great difficulty to the treatment technology, and the current technology is difficult to ensure that the emission standards are met at all times

[0005] The conventional treatment device adopts condensation + adsorption process, condensation adopts multi-mechanical refrigeration, liquid nitrogen, etc., adsorption uses activated carbon, etc., and also uses condensation + catalytic oxidation combination process, but due to large fluctuations in gas volume and concentration, refrigeration or liquid nitrogen cannot be matched at any time Cooling capacity

On the one hand, when the exhaust gas treatment volume and concentration are small, the energy consumption of the compressor is high, and it is easy to form overcooling, which will cause the heat exchanger channel to accelerate ice blockage, shorten the switching time of the heat exchanger, and at the same time, the protection of the minimum cooling temperature will cause the compressor to Frequent start and stop will accelerate the damage of wearing parts and increase maintenance costs, especially causing the follow-up catalytic oxidation device to fail to maintain normal operation due to insufficient calorific value and need to supplement heat; on the other hand, when the exhaust gas treatment capacity and concentration are large, due to cold Insufficient amount will make it impossible to recover organic compounds. At the same time, due to the large calorific value of the intake air, the subsequent catalytic oxidation device will be overheated and shut down in an emergency. Installing a VOCs treatment device cannot meet the emission standards.

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