Sewage sludge and household garbage mixed incinerating device based on grate furnace

Abstract

The invention discloses a sewage sludge and household garbage mixed incinerating device based on the grate furnace. The sewage sludge and household garbage mixed incinerating device comprises a feeding device and a double-hearth grate furnace, wherein the double-hearth grate furnace comprises a drying-section grate, a drying-section hearth, a combustion-section grate and a combustion-section hearth. A sewage sludge sprinkling device is arranged at the top of the drying-section hearth. Garbage is fed into the drying-section grate through the feeding device, the sewage sludge is sprinkled on the garbage through the sprinkling device at the top of the drying-section hearth, and the sewage sludge and household garbage are mixed, perform heat transfer and are gradually dried. The sewage sludge and household garbage on the combustion-section grate are gradually subjected to stable combustion and complete combustion under the air supply condition with reciprocating motion and stirring of grate pieces. The mixed combustion amount of the sewage sludge can be timely, conveniently and quickly adjusted according to the combustion satiation. The sewage sludge and household garbage mixed incinerating device fully utilizes household garbage incineration, waste heat utilization and smoke treatment and other mature technologies, enables the construction and operation cost of a sewage sludge incineration treatment project to be greatly reduced and achieves harmless, reduced and recycling sewage sludge treatment.

Description

technical field [0001] The invention relates to a sludge incineration device, in particular to a sludge and domestic garbage mixed incineration device. Background technique [0002] With the rapid development of economy and society and the acceleration of urbanization, the amount of sewage treatment in cities and towns has increased rapidly, and the sludge in sewage treatment plants has also increased sharply. According to statistics, the annual output of sludge in urban sewage treatment plants in China has exceeded 30 million tons . Sludge contains a large amount of organic matter, rich nutrients such as nitrogen and phosphorus, heavy metals, germs and pathogenic bacteria, etc. If it is not treated and discharged, it will cause serious pollution to the environment. How to effectively and economically dispose of excess sludge and realize the resource utilization of sludge has become a worldwide environmental problem, and it is also an unavoidable problem facing China. [0...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a sludge and domestic waste mixed incineration device based on a grate furnace, which makes full use of mature technologies such as domestic waste incineration, waste heat utilization and flue gas treatment, and realizes the harmless treatment of sludge. The problem of high construction and operation costs of separate sludge incineration treatment projects in the existing technology

Images