Refuse burning system and method with functions of deacidifying flue gas and retarding dioxin generation

Abstract

The invention discloses a refuse burning system and method with functions of deacidifying flue gas and retarding dioxin generation. The system of the invention comprises an exhaust-heat boiler, a flue gas cleaning device, a calcium base retardant adding device, a flue gas pre-humidifying device and a control device, wherein the flue gas pre-humidifying device is arranged between the exhaust-heat boiler and the flue gas cleaning device; the retardant adding device is used for adding calcium base retardant to the refuse burning system; and the calcium base retardant adding device, the flue gas pre-humidifying device and the flue gas cleaning device are respectively connected with the control device. The invention can simultaneously reduce the emission of dioxin materials and acidic gas, and is suitable for various solid waste burning systems.

Description

technical field [0001] The invention relates to the technical field of garbage incineration, and in particular to a garbage incineration system and method capable of deacidifying flue gas and retarding the generation of dioxins. Background technique [0002] Incineration treatment of solid waste such as household garbage has the advantages of complete harmlessness, high reduction, and high utilization rate of resource (heat recovery), and is one of the technologies that best embodies the three principles of waste treatment. It has been widely used in developed countries and regions such as Europe, America and Japan. Since the end of the 1990s, waste incineration technology has also developed rapidly in my country, and large and medium-sized cities have built waste incineration (power generation, heating) plants one after another. It will increase by a large margin, and the proportion of domestic waste and other solid waste treated by incineration will also increase year by y...

AI Technical Summary

Problems solved by technology

If the discharge of dioxin-like substances from waste incineration facilities cannot be effectively controlled and treated, it will bring great damage to the natural environment and cause great harm to human health.

However, this process is very unfavorable to the recovery of incineration heat energy, and it is not used in large-scale domestic waste incineration systems.

[0006] In addition, there are technologies to control the discharge of dioxins by installing metal catalyst degradation and ultraviolet photodegradation of PCDD / Fs devices at the tail, but they have not been widely used at present, and there is no mature and reliable process available for implementation.

Moreover, the composition of the garbage is extremely complex and unstable, and the incineration products contain a large amount of substances that can poison the catalyst. Whether metal catalysts and ultraviolet light degradation can be applied remains to be verified.

In addition, metal catalyst degradation and ultraviolet light degradation of PCDD / Fs technologies only target the part distributed in the gas phase, and have no effect on the digestion of PCDD / Fs adsorbed in fly ash

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