Treatment device and process integrating VOCs purification and denitration

Abstract

The invention discloses a treatment device and process integrating VOCs purification and denitration. The treatment device includes an RTO reactor; the RTO reactor comprises a combustion chamber and aplurality of regenerative chambers, the combustion chamber and the regenerative chambers are communicated, and the combustion chamber is located on the upper portions of the regenerative chambers; each regenerative chamber comprises an upper-section heat accumulator, a lower-section heat accumulator and a middle SCR catalyst bed layer; an air inlet valve, an air outlet valve and a purging valve are arranged at the bottom of any regenerative chamber; the input end of the gas inlet valve is connected with a buffer tank, and the buffer tank is connected with a VOCs waste gas pipeline and an ammonia gas pipeline; the input end of the purge valve is connected with a purge gas supply pipeline; a combustor is further arranged at the top of the combustion chamber, wherein the input end of the combustor is connected with a fuel gas pipeline. According to the device, the high-temperature environment in the RTO reactor is fully utilized in the SNCR-SCR reaction, ultra-clean emission of VOCs andNOx is achieved, and the purpose of reducing energy consumption is achieved. Meanwhile, a corresponding treatment process is provided, so that VOCs can be effectively purified and NOx can be effectively removed at the same time, and the operation is reliable.

Description

technical field [0001] The invention belongs to the technical field of industrial waste gas treatment, and relates to a treatment device and process integrating VOCs purification and denitrification. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, hereinafter referred to as VOCs) is a general term for a series of volatile, flammable and toxic organic compounds, including alkanes, alkenes, aromatic hydrocarbons, alcohols, aldehydes, ketones, halogenated hydrocarbons, etc. VOCs is a general term for organic compounds released into the air by volatilization of high vapor pressure materials during storage and loading and unloading of oil products and chemical materials. VOCs not only cause a great waste of resources but also cause serious air pollution. [0003] For low-concentration VOCs waste gas with large air volume, low concentration, and no recovery value, the VOCs medium is usually destroyed by means of regenerative incineration (RTO)...

AI Technical Summary

Problems solved by technology

Since the SCR reaction needs to be carried out at a certain temperature (200-400°C), and the temperature of the exhaust gas at the outlet of the RTO device is not higher than 100°C after heat recovery, additional heat is required to reheat the exhaust gas before entering the SCR Reactor, resulting in a significant increase in the energy consumption of this two-stage process compared with a single set of RTO equipment, which does not meet the current energy-saving and environmental protection process requirements

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