Sludge desiccation burning integral treatment method and device

Abstract

A method of integrated treatment of sludge drying and incineration is provided, which comprises the follow steps of: feeding sludge into a rotary-type sludge dryer, introducing a part of moderate-temperature fume inside a fluidized bed incinerator into the rotary-type sludge dryer to heat and evaporate the water in the sludge, feeding the obtained semi-dried sludge into the fluidized bed incinerator; introducing the other part of moderate-temperature fume into an air pre-heater, heating the fist-stage and second-stage air of the fluidized bed incinerator, transferring parts of ash and bed media exhausted from the fluidized bed incinerator to the rotary-type sludge dryer, and mixing with the sludge inside the rotary-type sludge dryer. A device for implementing the method comprises a storage feed device, the rotary-type sludge dryer and the fluidized bed incinerator. The invention realizes the integrated treatment of drying and incineration; omits the intermediate links between the drying and incineration links, such as sludge cooling, sludge storage, sludge transportation and heat medium drying; simplifies the system; reduces the occupied area; and reduces the investment and cost.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a sludge drying and incineration device, in particular to a sludge drying and incineration integrated treatment method and device. Background technique [0002] Sludge is a solid, semi-solid and liquid product produced in the sewage treatment process. It contains a large amount of organic matter, heavy metals, pathogenic bacteria and pathogenic bacteria. If it is discharged without treatment, it will cause serious pollution to the environment. In the prior art, the sludge treatment method mainly adopts the incineration method. The incineration method has the advantages of fast processing speed, harmlessness, and high degree of reduction, especially for areas where land resources are scarce, or where the content of toxic and harmful substances is high. For industrial sewage sludge, incineration is the only effective treatment method. The sludge incineration technologies mainly include gra...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an integrated treatment method of sludge drying and incineration. The integrated treatment method of sludge drying and incineration should solve the problems of drying and incineration in the sludge treatment process in the prior art. Separation of process and equipment, complex system, low reliability, large heat loss, low thermal efficiency, many equipment, large land occupation, high cost, many transportation links and auxiliary equipment

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