Device and method for magnetic separation of underwater sludge

A treatment method and a treatment device technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems that the effluent cannot be discharged directly, low energy consumption and land occupation, etc., and achieve dredging cost reduction, increase efficiency, and sludge output big effect

Inactive Publication Date: 2010-08-11
中国船舶重工集团公司第七〇二研究所
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Problems solved by technology

[0003] Aiming at the disadvantage that the effluent of the existing magnetic separation equipment for treating bottom sludge can not be discharged directly, the applicant provides a magnetic separation treatment

Method used

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  • Device and method for magnetic separation of underwater sludge
  • Device and method for magnetic separation of underwater sludge
  • Device and method for magnetic separation of underwater sludge

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Embodiment Construction

[0025] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the treatment device of the underwater sludge of the present invention includes a rolling screen 1 connected in series by a screw pump 6, a flocculation tank 2, a magnetic separation device 3, a reaction tank 4 and a sludge separation tower 5, wherein the upper stage treatment The water outlet of the device is connected to the inlet of the next-stage treatment device, and the mud outlet 503 of the separation tower 5 is connected to the inlet 301 of the magnetic separation equipment through the screw pump 6 .

[0027] For the actual workflow see Figure 1 to Figure 6 : muddy sewage is sucked in from the inlet 101 by the mud pump, and falls on the rolling screen 105, such as figure 2 As shown, the bottom of the screen 105 is supported by a support net 104, which can reciprocate around the cylinders 106 on...

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Abstract

The invention relates to a device and a method for magnetic separation of underwater sludge. The device comprises a roller screen, a magnetic separator, a reaction tank and a sludge separation tower which are connected in series by pipelines, wherein a water outlet of the previous stage treatment device is connected with an inlet of the next stage treatment device, and a sludge outlet of the sludge separation tower is connected to an inlet of the magnetic separator. The device has the characteristics of small floor area, low energy consumption, non-clogging continuous operation, large sludge yielding quantity and the like, has good removability and can be conveniently arranged at a sludge treatment site; the device not only reduces the natural drying time of a sludge stock dump and improves the sludge treatment efficiency, but also greatly reduces the desilting cost; and during an actual operation, the output quantity of sludge cakes is large, the yielding water of the separation tower completely reaches a primary standard in discharge indexes (GB18918-2002).

Description

technical field [0001] The invention relates to the field of environmental protection equipment, in particular to a treatment device and method for underwater sludge. Background technique [0002] In recent years, the water quality of the lake has been polluted, the pollutants in the sediment sediment have accumulated seriously, and the content of nitrogen, phosphorus, and organic matter is relatively high, which provides the necessary nutrients for the outbreak of blue-green algae and lake flooding. Therefore, the removal of lake sediment Particularly important. The lake sediment has a large water content, and the use of sludge drying technology can greatly reduce the transportation pressure of subsequent treatment, improve the efficiency of dredging, and reduce the cost of dredging. However, during the separation process of magnetic separation equipment, fine flocs will be discharged with water, and the effluent usually cannot be discharged directly, which limits its dire...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 葛春康邹永明杨栋倪其军
Owner 中国船舶重工集团公司第七〇二研究所
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