Two-stage spraying temperature-returning pretreatment system for fat-rich combustion waste gas

Abstract

The invention discloses a two-stage spraying temperature-returning pretreatment system for fat-rich combustion waste gas. The two-stage spraying temperature-returning pretreatment system comprises a first-stage spraying and cooling device, a second-stage spraying and cooling device and a temperature-returning device, and the first-stage spraying and cooling device comprises a waste gas induction pipe, a straight pipe cavity, a necking horn mouth and a guide-out pipe which communicate from top to bottom; a plurality of groups of outer spraying nozzles are arranged on the periphery of the straight pipe cavity; the second-stage spraying and cooling device comprises an induction pipe, an upper horn pipe, a lower horn pipe and a water outlet guide pipe which communicate with one another from top to bottom, the water outlet guide pipe is connected to a water outlet pipe, and a water outlet valve is arranged on the water outlet pipe; a plurality of high-pressure nozzles are mounted on the pipe wall of the upper horn pipe; and an air outlet guide pipe is arranged at the joint of the upper horn pipe and the lower horn pipe in an intersecting and communicating mode and provided with an air outlet valve. According to the system, fat-rich combustion flue gas can be rapidly and stably cooled to avoid generation of dioxin, fatty acid and other easily-coagulated substances in the flue gas are effectively removed, temperature returning can be achieved on the cooled flue gas, and preparation is made for subsequent removal of nitro-hydrocarbon.

Description

technical field [0001] The invention belongs to the technical field of configuration of smoke or waste gas treatment devices, and relates to a method for removing toxic substances (including soot, inhalable particles, and nitrogen oxides) in flue gas by using a cleaning fluid and a warming device, especially for high-temperature products such as dioxins. generating pollutants and nitrohydrocarbons), especially a device for fat-rich combustion, which uses a combination of multi-stage spraying and temperature recovery technology, and can be used in conjunction with the current mature flue gas post-treatment equipment to remove smoke Flue gas pretreatment device for toxic substances in the gas. Background technique [0002] Solid waste refers to the solid and semi-solid waste produced by human beings in production, consumption, life and some other activities. Science, energy power science, safety science and other fields are closely related. There are various types of solid w...

AI Technical Summary

Problems solved by technology

For nitro hydrocarbons, it is still in the research stage. Almost all equipment on the market does not consider this important pollutant discharge, and the safety range of this pollutant is also not specified in the emission standards. The rapid cooling of most spray equipment has Facilitate the formation of nitro hydrocarbon substances, which will greatly increase the content of nitro hydrocarbon substances in the tail gas

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