Sludge treatment method and device for urban drainage pipe network

Abstract

A sludge treatment method for an urban drainage pipe network comprises the following steps of: 1) multi-stage screening; 2) conveying the separated slag into a garbage bucket by a conveying device; 3) conveying the separated sewage to a sewage-collecting pool; 4) arranging a first submersible sewage pump outlet on the sewage-collecting pool, wherein the pump is connected to a cyclone desander andis used to separate mud and sand with micro particle sizes, discharging the separated mud and sand through a sand-settling nozzle for the screening step, allowing the separated sewage to enter the underground drainage pipe network through an overflow pipe of the cyclone desander; 5) setting a reclaiming pool, pumping reclaimed water to a flushing distributor by a second submersible sewage pump, and conveying the reclaimed water to each screening device and each conveying device by the flushing distributor according to working conditions; slag with a water content of below 40%, and clear waterwhich is allowed to directly enter the underground drainage pipe network for circulation can be obtained through above steps. The invention can perform rapid dehydration treatment of sludge in a sewer well; the treated water is allowed to directly enter the drainage pipe network for circulation, while the slag can be transported by common vehicles. The purposes of high efficiency, environmental protection, and safe dredging are achieved.

Description

technical field

[0001] The invention relates to the field of sludge treatment, in particular to a method and equipment for treating sludge in an urban drainage pipe network. Background technique

[0002] With the acceleration of urbanization in our country, the rapid growth of urban population and the continuous increase of per capita sludge discharge have led to a sharp increase in the volume of sludge transport in urban drainage pipe networks. Due to the continuous expansion of the urban area, the landfill is far away from the urban area, resulting in an increase in the cost of sludge transportation and an increase in the landfill area; and the urban drainage pipe network sludge has a high moisture content, dripping during transportation and waste in the landfill. Sludge leachate forms secondary pollution to the environment. How to reduce the moisture content of the sludge transported out of the urban drainage pipe network, that is, to reduce the amount of sludge and redu...

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