City sludge fluidized bed combustion device and method

Abstract

Urban sludge fluid bed burning devices and its method relates to urban sludge burning disposal and excess heat-recovering method, belonging to volume reduction, innocence, and resources handling field. Said burning equipment is made up of incinerator body (2), wind-distributing plate (8), wind room (10) and tail end chimney flue (15), the top of incinerator body (2) and tail-end chimney flue (15) are connected together; wind-distributing plate (8) whose under-part is wind room (10) is fixed at the bottom of incinerator body (2) with mass-flow burning area at its bottom and dilute phase area on its top; dry sludge after drying is added to incinerator through worm distributor by grading air supply technique; cooling medium of wind-distributing plate adopts organic heat carrier. Smoke gas flows across tail-end convection heating surface and air heater after entering tail-end chimney flue from dilute phase, being introduced to tail gas handling system after cooling to below 200 Deg C to remove dust, wash, and released to air through exhauster and chimney finally.

Description

technical field [0001] The invention relates to an incineration disposal and waste heat recovery method of urban sludge, in particular to an urban sludge fluidized bed incineration device and method using an organic heat carrier as a waste heat recovery medium. It belongs to the field of reducing, harmless and resourceful disposal of urban sludge. Background technique [0002] Municipal sludge refers to the solid and semi-solid waste generated during the water treatment process of urban domestic sewage and industrial sewage, which is mainly composed of solid residue and water. Municipal sludge generally contains a large amount of organic matter, rich nutrients such as nitrogen and phosphorus, heavy metals, pathogenic bacteria and pathogenic bacteria, etc., and is often accompanied by malodorous gases. If it is discharged without treatment, it will cause serious secondary pollution to the environment. . With the rapid development of the global economy, the increasing popula...

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Problems solved by technology

[0004] The sludge incinerators built before the 1960s were mainly multi-chamber incinerators. Due to their poor environmental performance, multi-chamber furnaces gradually lost their competitiveness

The heat generated during the combustion of auxiliary fuels such as sludge and coal can be utilized through waste heat recovery, but when there are not enough heat users around the incineration plant, there is a big problem in the feasibility of this incineration method

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