Sludge reduction and recycling treatment device and sludge treatment method

Abstract

Provided are a sludge reduction and recycling treatment device and a sludge treatment method. The method includes the steps of performing spray drying on dewatered sludge, mixing coal pyrolysis, using pyrolytic carbon incineration ash as a raw building material, recycling pyrolysis oil and pyrolysis gas as supplement energy, performing up-to-standard discharging on flue gas emitted by a pyrolysis furnace after subjecting the flue gas to treatment in a spray tower, a mist removal device and an activated carbon adsorption bed, and supplying an incinerator with low heat of the pyrolysis furnace. The sludge reduction and recycling treatment device and the sludge treatment method have the advantages of being capable of achieving a sludge recycling recovery rate of 95%, a sludge reduction rate of over 96%, a heavy metal solidification rate of 95% and zero emission of pollutants; the generation of harmful gas such as dioxin is inhibited due to fully-enclosed oxygen-free environment pyrolysis and sulfur in coal; residual dioxin can be decomposed by being burnt at the temperature above 950 DEG C so as to ensure no generation and emission of dioxin in an entire reaction process of a system; a mixture of flue gas, low heat, pyrolysis gas and pyrolysis oil can be recycled, so that energy consumption and treatment costs are reduced.

Description

Technical field [0001] The invention belongs to the field of solid waste treatment, and specifically relates to a sludge reduction resource treatment device and a treatment method. Background technique [0002] With the development of cities, the increase in sewage treatment rate and the increasing output of sludge, the outlet of sludge from sewage treatment plants has become a complex environmental problem and has attracted widespread attention. Municipal sludge is a high-water solid produced in the purification process of urban domestic sewage. It is an extremely complex heterogeneity composed of organic debris, bacteria, various pathogens, refractory organic matter, heavy metals, and organic and inorganic particles. Body is a kind of extremely hazardous solid waste. If it is not thoroughly treated and controlled, it will cause serious secondary pollution and great harm to the environment. How to safely and economically dispose of urban sludge has become an environmental probl...

AI Technical Summary

Problems solved by technology

The disadvantages of this incineration and sludge drying process are: the heat source of the rotary kiln is provided by the high-temperature flue gas generated by the pyrolysis and incineration of solid combustible waste, and the pyrolysis and incineration of solid combustible waste will produce harmful gases such as sulfur dioxide and dioxin, resulting in Environmental pollution; at the same time, it consumes a lot of energy; in addition, the tail gas needs to be treated by cooling, deacidification, deposition and ash removal, and the process is more complicated

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