Self-maintaining incineration system for sludge and working method

Abstract

The invention discloses a self-maintaining incineration system for sludge and a working method. The self-maintaining incineration system for the sludge comprises a storing and conveying system, a semi-desiccation system, an incineration and waste heat boiler system, a turbine power generation system, a flue gas treatment system and an ash slag treatment system; the semi-desiccation system comprises a sludge desiccation machine; the incineration and waste heat boiler system comprises an incinerator and a waste heat boiler; and the turbine power generation system comprises a turbine power generator and a steam circulating pipeline, wherein the steam circulating pipeline comprises closed-loop circulating pipelines which sequentially connect the turbine power generator, the sludge desiccation machine and the incineration and waste heat boiler system in series. The working method of the system comprises the steps that power generation is conducted through heat generated through incineration, and desiccation operation is conducted on the wet sludge through the semi-desiccation system. Therefore, the high heat utilization efficiency is achieved through cooperation of the whole desiccation, incineration and waste heat utilization system and the using method thereof, self-maintaining incineration of the sludge can be achieved without adding external energy, the yearly running time reaches 8,000 h, and outlet flue gas is exhausted in the manner of meeting the national standard.

Description

technical field [0001] The invention relates to the field of pollutant treatment, in particular to a sludge self-sustaining incineration system and working method. Background technique [0002] For a long time, the tendency of "heavy water and light sludge" has prevailed in my country's sewage treatment industry, leaving many sludge treatment and disposal problems. Sludge, as the remaining product of sewage treatment, is a high-moisture sediment produced in the process of sewage treatment. It is an aggregate composed of a variety of microbial bacteria micelles and their adsorbed organic and inorganic substances. Sludge contains toxic and harmful substances such as heavy metals, pathogenic bacteria, parasites and refractory substances, which seriously threaten the safety of human beings and the ecological environment. If the sludge is not treated scientifically and rationally, it is easy to cause secondary pollution. At present, sludge treatment and disposal has become the ...

AI Technical Summary

Problems solved by technology

Due to the high moisture content and low calorific value of sludge, most of the domestic sludge can only be used as co-combustion materials for co-processing with waste incineration power plants, cement kilns and coal-fired power plants, but the amount of sludge co-combustion is limited , and sludge blending will reduce the temperature in the furnace and the softening point of ash, and increase the amount of fly ash produced, increase the load of dust removal and flue gas purification, and reduce boiler efficiency and other disadvantages

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