Comprehensive waste heat recycling system and recycling method based on vocs thermal oxidation treatment

Abstract

The invention discloses a VOCs thermal oxidation treatment-based comprehensive waste heat recycling system and recycling method. The system comprises a heat storage type incinerator, a flow divider, an absorption type refrigerating machine, an adsorption bed, a circulating fan and an air supplementing fan. The method comprises the following steps that part of smoke generated by a combustion chamber is conveyed to the absorption type refrigerating machine, the other part is conveyed to the adsorption bed, desorbed gas discharged from the adsorption bed is conveyed into the combustion chamber for combustion, part of the generated secondary smoke is conveyed to the absorption type refrigerating machine, the other part of the generated secondary smoke is conveyed to the adsorption bed, and then the secondary desorbed gas discharged from the adsorption bed is conveyed into the combustion chamber for combustion; Air supplementing processes are carried out in the whole process. According to the system and the method, the waste heat recovery adopts echelon heat extraction, specifically, the heat storage chamber is used for storing heat, the absorption type refrigerating machine is used forextracting heat, domestic hot water is used for heating and desorption hot air sources are used, and according to the gas temperature requirements of different waste heat utilization modes, the wasteheat is utilized to the maximum extent, and the energy utilization efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery from combustion exhaust gas, and relates to a comprehensive waste heat recycling system and a recycling method based on VOCs thermal oxidation treatment. Background technique [0002] A variety of volatile organic compounds (volatile organic compounds, [0003] VOCs), which mainly refer to volatile organic compounds with a vapor pressure greater than 0.1mmHg and a boiling point lower than 260°C under normal conditions, widely exist in petrochemical, printing, catering and other fields. [0004] VOCs contain a large number of carcinogens, such as: toluene, xylene, formaldehyde, acetaldehyde, etc. Under the action of sunlight and heat, VOCs can undergo complex chemical and photochemical interactions with nitrogen oxides in the atmosphere to form photochemical smog, which is the main source of haze. [0005] In order to reduce the harm of VOCs, direct combustion method, catalytic combus...

AI Technical Summary

Problems solved by technology

Among them, only the direct combustion method and the catalytic combustion method can completely destroy VOCs, and the direct combustion method requires high temperature and high energy consumption, and the catalyst required by the catalytic combustion method is expensive and easily poisoned

However, although these two methods can destroy VOCs, it is difficult to use the waste heat in VOCs, resulting in large energy consumption

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