System suitable for comprehensively treating bottom sediments in city inland river

A comprehensive treatment and sedimentation technology, applied in water/sludge/sewage treatment, dewatering/drying/concentrated sludge treatment, water/sewage multi-stage treatment, etc., can solve the problem of inconvenient dredging of urban rivers

Inactive Publication Date: 2011-11-23
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a system suitable for comprehensive treatment of urban inland river sediment, which solves the probl

Method used

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  • System suitable for comprehensively treating bottom sediments in city inland river
  • System suitable for comprehensively treating bottom sediments in city inland river

Examples

Experimental program
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Embodiment 1

[0009] If the sand content of the location is large, the bottom mud is pumped into the grit chamber 2 through the cutter suction pump 1, and the sand is recycled as construction sand after grit, and the mud water after grit enters the flocculation tank, where flocculant is added Polyacrylamide, after flocculation reaction, can realize the effective removal of suspended solids in muddy water. The muddy water in the flocculation tank flows through the transition section and enters the sedimentation tank. The muddy water is separated in the sedimentation tank, and the clear water in the upper layer can be used for subsequent applications. , while the sludge at the bottom of the flocculation tank, the transition section and the sedimentation tank is transported to the sludge tank, and then transported to the sludge dewatering device, and the clear water in the sedimentation tank is dissolved with the curing agent to obtain a suitable concentration of curing agent and added to the sl...

Embodiment 2

[0011] If the amount of sediment to be processed is small, it is not necessary to pass through the grit chamber, and the sediment directly enters the flocculation tank after passing through the cutter suction pump. In the flocculation tank, the removal of suspended particles is achieved by adding flocculants. After being treated in the sedimentation tank, the upper layer The clear water can be discharged up to the standard, and the sludge in the flocculation tank, sedimentation tank and transition section is sent to the sludge dewatering device. The moisture content of the obtained mud cake is 15%, and the mud cake is shipped out for resource utilization. Process odors are disposed of.

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Abstract

The invention belongs to the field of environmental protection, and relates to a system suitable for comprehensively treating bottom sediments in a city inland river. The bottom sediments are effectively extracted by a cutter-suction water pump, sand settlement is performed according to the actual condition of the bottom sediments, and the obtained sand can be used as building sand; upper-layer mud water is conveyed to a flocculating tank through a sewage pump, the settlement of suspended particles in the mud water is accelerated, effluent flows into a precipitating tank to be further precipitated, and sludge at the bottoms of the flocculating tank and the precipitating tank is conveyed to a rear-end sludge dehydrator and dehydrated by combining a dehydrating agent with a belt dehydrator, so that sludge with the water content of about 50 percent is obtained and transported to be recycled; and flocculation effluent has reached the discharge standard, and can be used for a sludge dehydrating working section or directly discharged to a river channel to supplement a water body, and odor generated in the dehydrating process can be treated by a deodorizing device. The whole process is simple and compact, the bottom sediments are treated, and the building sand and the sludge with low water content are obtained simultaneously.

Description

technical field [0001] The invention belongs to the field of environmental protection and relates to a system suitable for comprehensive treatment of urban inland river sediment. Background technique [0002] The rapid development of my country's economy has brought great pressure on resources and the environment, especially the environmental problems of rivers, lakes and other water bodies have been paid more and more attention by everyone, and the treatment of sediment in water bodies, because it involves cleaning, drying, utilization, etc. These issues require multi-level and multi-angle research. At present, when treating the bottom sludge in the river channel mud pond, the common method is grabbing the mud combined with drying. This method has relatively low requirements, but the implementation of the project needs to occupy a large amount of land resources, and it is easy to cause secondary pollution to the soil; Another method is cutter suction dredging combined with ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F11/12
Inventor 汪群慧马鸿志艾恒雨张文毓左彦东范元国
Owner UNIV OF SCI & TECH BEIJING
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