A sludge treatment device coupled with combined drying and incineration

Abstract

The invention discloses a composite drying and incinerating coupled sludge treatment device and belongs to the technical field of sludge treatment. The problems existing during current sludge treatment through an incinerating method are solved. The composite drying and incinerating coupled sludge treatment device comprises a circulating fluidized bed, a sludge drying system and a tail gas purification system. The sludge drying system comprises a pipe type heat exchanger, a steam heater and a rotary kiln roller dryer; the pipe type heat exchanger and the steam heater are both arranged in a tailflue of the circulating fluidized bed; the cylinder wall of the rotary kiln roller dryer is of a hollow tube nest structure; an inlet and an outlet of the pipe type heat exchanger communicate with the two ends of the cylinder wall correspondingly; a steam outlet of the steam heater is connected with a steam inlet of the rotary kiln roller dryer; and the tail gas purification system comprises an activated carbon injection system, a cloth bag dust remover, a second draught fan and a wet method desulfurization device. The composite drying and incinerating coupled sludge treatment device is usedfor treatment of sludge with the dry basis low-position heat value being 1800-2500Kcal / kg.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a sludge treatment device coupled with composite drying and incineration. Background technique [0002] In recent years, the amount of urban sewage treatment in my country has been increasing day by day, and the sludge produced by sewage treatment plants is also increasing. It is estimated that by 2020, about 60 million tons of wet sludge with a water content of 80% will be produced every year. Sludge contains a large amount of toxic substances, harmful bacteria, parasite eggs and heavy metals. If the sludge is discharged directly or piled up for a long time, it will lead to a series of ecological and environmental problems such as eutrophication of water, soil pollution, and rapid spread of germs. At present, the landfill method is mainly used for sludge treatment in my country, but this method also brings very serious consequences: the leachate produced by ...

AI Technical Summary

Problems solved by technology

At present, there are many problems in domestic sludge drying and incineration technology. For example, the patent applied by Changxing Chuangzhi Technology Co., Ltd., a dry sludge incineration device (application number: 201611247020.4), although the sludge combustion efficiency has been improved to a certain extent , but there are too many intermediate transmission devices, the motor load is too large, and the waste heat of high-temperature flue gas cannot be effectively utilized

A patent applied by Guangdong Huanjie Environmental Protection Technology Co., Ltd., a sludge incineration system and its incineration method (application number: 201710212039.3), which requires secondary processing of sludge, complex devices, and increased operating costs

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