Device and method for dewatering and drying mud under water

Abstract

The invention relates to a device and a method for dewatering and drying mud under water. The device comprises a filter sieve, a filter press, a purification tower and a centrifugal machine, wherein the filter sieve is connected in series with a delivery pump through a pipeline; input pipelines of the filter press, the purification tower and the centrifugal machine are provided with flocculating agent adding machines; and a water outlet of the centrifugal machine is connected to an input port of the purification tower. A plurality of water treatment equipment are selected reasonably and a complete set of device is established based on the advantages of various equipment, so that the defect of low treatment efficiency of single equipment is overcome and dewatering and drying treatment can be efficiently performed on mud under water. The device and the method have the characteristics of reducing time needed by natural drying of a mud yard, improving mud treatment efficiency, greatly lowering dredging cost and meeting the requirement of mass, batched and engineered mud treatment, along with small floor area, low energy consumption, no blocking in continuous operation, high mud yield, good mobility, convenient arrangement on a mud treatment site and the like.

Description

Technical field [0001] The invention relates to the field of environmental protection equipment, in particular to an underwater sludge dewatering and drying device and method. Background technique [0002] In recent years, lake water pollution has caused serious accumulation of pollutants in sediments, with relatively high levels of nitrogen, phosphorus, organic matter, etc., which provided necessary nutrients for the outbreak of cyanobacteria and lake flooding, so the lake sediments were removed Particularly important. Lake sediment has a large water content, and the use of silt drying technology can greatly reduce the transportation pressure of subsequent treatment, improve the efficiency of dredging, and reduce the cost of dredging. At present, sludge drying technology at home and abroad mainly adopts chemical solidification method or dehydration drying method. The treatment object of the chemical curing method is mainly the sludge with high water content and fluidity. A lar...

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Problems solved by technology

[0003] Aiming at the shortcomings of the above-mentioned existing mechanical dehydration equipment used for drying underwater sludge, the effluent cannot be directly discharged, and cannot be produced in a large scale or in batches, the applicant provides a device and method for dehydrating and drying underwater sludge with reasonable technology and low consumption. Low energy, can carry out sludge drying treatment on a large scale and in batches

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