Coupled generating system matched with steel ball milling system and used for drying sludge by using smoke

Abstract

The invention discloses a coupled generating system matched with a steel ball milling system and used for drying sludge by using smoke. The coupled generating system comprises a drying machine, a drysludge storage bin and a boiler, wherein the drying machine is used for dehydrating and drying high-moisture sludge of a sewage treatment plant after dehydration, an outlet of the drying machine is connected to an inlet of the dry sludge storage bin, both an outlet of the dry sludge storage bin and an outlet of a coal bunker are connected to a position, to which steel balls are added, of the top of a steel ball coal mill, an outlet of the steel ball coal mill is connected to a boiler furnace, and high-temperature smoke between a boiler economizer and an air preheater is used for supplying a required drying heat source to the drying machine. According to the coupled generating system, the high-temperature smoke of the boiler is extracted to enter the sludge drying machine so as to dry the sludge in the drying machine and reduce the water content of the sludge, the dry sludge is directly sent to the steel ball coal mill to be milled, and the dry smoke is directly sent to the boiler furnace to burn, so that while sludge drying and coupled generation are realized, the problem of treatment of pollutants released in a sludge drying process is solved.

Description

technical field [0001] The invention belongs to the technical field of high-moisture sludge drying coupled power generation, and in particular relates to a coupled power generation system with steel ball milling system and utilizing flue gas to dry sludge. Background technique [0002] With the development of my country's industry and the acceleration of urbanization, the rate of urban sewage treatment has increased, resulting in a large amount of sludge. Sludge is a kind of pollutant with complex nature, high pollutant content and huge potential environmental risk. It is a liquid-solid substance with high water content and contains a large number of pathogenic bacteria, parasite eggs, and heavy metal toxic and harmful substances such as chromium and mercury. Sludge has seriously affected people's production and life, and caused serious pollution to the environment. The problem of urban sludge treatment has become a major environmental protection problem that needs to be sol...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the thermal power unit with the steel ball mill pulverization system, the present invention provides a steel ball mill pulverization system and a coupled power generation system using flue gas to dry the sludge. The sludge is dried inside the machine to reduce the moisture content of the sludge. The dried sludge is directly sent to the steel ball mill for pulverization, and the dried flue gas is directly sent to the boiler furnace for combustion, realizing the coupling power generation of sludge drying. At the same time, it solves the problem of pollutants released during the sludge drying process.

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