Dangerous waste carbon energy-saving activation and regeneration system capable of inhibiting generation of dioxin

Abstract

The invention discloses a dangerous waste carbon energy-saving activation and regeneration system capable of inhibiting generation of dioxin. The system comprises a waste carbon regeneration unit anda tail gas treatment unit, the tail gas treatment unit comprises a buffer tank, a secondary combustion chamber, a waste heat boiler and a denitration part; the secondary combustion chamber comprises an outer furnace body and an inner furnace body; wherein the inner furnace body is coaxially sleeved in the outer furnace body; the inner wall of the inner furnace body and the inner wall of the outerfurnace body form an annular preheating cavity; an outlet of the buffer tank is communicated with the bottom of the annular preheating cavity between the inner furnace body and the outer furnace bodythrough a pipeline; an inlet of the waste heat boiler is communicated with the bottom of an inner cavity of the inner furnace body through a pipeline. The denitration part comprises a urea stirring tank, a circulating pump, a urea solution storage tank, a metering pump and a urea atomizing nozzle; the urea atomizing nozzle is used for spraying an atomized urea solution into a hearth of the waste heat boiler, organic substances in tail gas are fed into the secondary combustion chamber to be completely combusted to form flue gas, the temperature of the flue gas reaches 1200DEG C, the standing time of the flue gas is longer than 2s, and generation of dioxin substances can be inhibited.

Description

technical field [0001] The invention relates to the technical field of solid waste harmless treatment equipment, in particular to an energy-saving activation regeneration system for hazardous waste carbon that can inhibit the generation of dioxin. Background technique [0002] Activated carbon is a good carbon-based adsorbent material and an industrial adsorbent with a wide range of uses. Activated carbon loses its activity as the adsorption capacity increases, and becomes a hazardous waste because it contains harmful components. The regeneration of activated carbon refers to the use of physical, chemical or biochemical methods to treat the carbon that has lost its activity after adsorption waste, and restore its adsorption performance to achieve the purpose of repeated use. Activated carbon regeneration methods include thermal regeneration, chemical regeneration, biological regeneration, and emerging supercritical fluid regeneration methods, electrochemical regeneration me...

AI Technical Summary

Problems solved by technology

There are many forms of heating and regeneration devices. At present, the main ones used in China are rotary kilns, fluidized bed furnaces, and no matter what kind of heating and regeneration devices are used, they need to be dried in the initial stage. There is no drying equipment for filter cake and paste materials with such characteristics in China.

For the activation process, the use of rotary kiln needs to use high-grade energy such as primary energy or electricity as heating energy, and the energy consumption is high. Fluidized furnace or fluidized bed is used. The existing gas-solid separation device is a bag filter. Because the bag filter does not High temperature resistance, the regenerated activated carbon needs to be cooled before gas-solid separation, and the energy consumption is also high

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