Method for recycling ozone tail gas for sludge incineration

Abstract

The invention discloses a method for recycling ozone tail gas for sludge incineration, which is characterized in that a tail gas collecting pipe is arranged at the top of an ozone contact tank and isused for collecting tail gas generated after ozone contact oxidation, and a tail gas collecting system is used for introducing the collected ozone tail gas into a sludge incineration system; CO2 in incineration tail gas is collected through a sludge incineration tail gas recycling system, then purified CO2 is captured and stored through a CO2 capturing and sealing device, and near-zero emission ofthe ozone tail gas and the sludge incineration tail gas is achieved; and a part of the recycled CO2 flows back to the front end of the sludge incineration system. According to the method, ozone tailgas destruction treatment cost and pure oxygen preparation cost are reduced; and meanwhile, the sludge incineration tail gas is CO2 and can be recycled, so that the problem of high treatment cost caused by complex components and high sludge treatment difficulty of the sludge incineration tail gas is solved. Near-zero emission of the ozone tail gas and the sludge incineration tail gas of a sewage plant is realized, waste is turned into wealth, and low-carbon operation of the sewage plant is facilitated.

Description

technical field [0001] The invention discloses a method for recovering and utilizing ozone tail gas for sludge incineration, and belongs to the technical field of municipal drainage or environmental engineering. The invention is suitable for the sewage treatment plant which adopts the ozone oxidation system and the sludge incineration process and has energy recycling and low-carbon operation requirements. Background technique [0002] Ozone has a strong oxidizing ability and good purification effect. It can reduce the refractory pollutants in wastewater to the allowable discharge concentration in a short period of time, and can also eliminate carcinogenic halogenated organic precursors in wastewater. More and more Most of them are used for advanced treatment in municipal sewage plants. [0003] Ozone generally used in sewage treatment is often generated from an oxygen source. After ozone and sewage are contacted and oxidized, the content of oxygen (tail oxygen) in the tail ...

AI Technical Summary

Problems solved by technology

However, if pure oxygen combustion is used, due to the high cost of pure oxygen preparation and the high energy consumption of air separation oxygen production equipment, the operating cost of sludge incineration will be greatly increased, so there is no report on the application of pure oxygen to sludge incineration

Images