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Sand and gravel processing washing wastewater treatment system and method

A wastewater treatment system and wastewater treatment technology, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. and other problems, to achieve the effect of low system energy consumption, less equipment investment, and improved applicability

Active Publication Date: 2017-06-20
CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with this solution is that there are many equipments, large investment and high energy consumption.

Method used

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  • Sand and gravel processing washing wastewater treatment system and method
  • Sand and gravel processing washing wastewater treatment system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 , 2 Among them, a sand and gravel processing washing wastewater treatment system, the working inlet of the air lift pump is set in the grit chamber 7, and the working outlet of the air lift pump is connected to the sand collection tank 8 arranged obliquely above the grit chamber 7, and the collection The sand tank 8 is connected to the sand-water separator 10, and the sand-water mixture lifted by the air lift pump is sent to the sand-water separator 10 by gravity; in this example, the sand-collecting tank 8 is arranged obliquely, and the lower end is separated from the sand-water The device 10 is connected, and the higher end is provided with an exhaust hole 16 for exhausting. The sand-water separator 10 in this example is a spiral screen sand-water separator, a linear vibrating screen or a centrifugal screen. The grit chamber 7 is provided with an overflow tank 12, and the overflow tank 12 is connected with the sedimentation tank 11 through a pipelin...

Embodiment 2

[0053] On the basis of Example 1, a method for wastewater treatment using the above-mentioned gravel processing flushing wastewater treatment system comprises the following steps:

[0054] 1. After the gravel waste water 2 is mixed with the compressed air 3, it is sent into the first water collection well 23, and then sent into the grit chamber 7 through the first lift pump 4;

[0055] 2. After settling in the grit chamber 7, the air lift pump sends the grit into the sand collection tank 8, and then sends it to the sand water separator 10 after exhausting through the vent hole 16 of the sand collection tank 8;

[0056] 3. The supernatant of the grit chamber 7 enters the overflow tank 12, and after adding the flocculant 13, it is sent to the sedimentation chamber 11 through the pipeline;

[0057] 4. The air lift pump sends the sediment to the dehydration device to make mud cake 14;

[0058] 5. The supernatant of the sedimentation tank 11 is recycled.

[0059] In the preferred...

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PUM

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Abstract

The present invention provides a system and method for treating sand and gravel processing flushing wastewater. The working inlet of the air lift pump is set in the grit chamber, the working outlet of the air lift pump is connected to the sand collection tank, and the sand collection tank is connected to the sand water separator; The grit chamber is provided with an overflow tank, and the overflow tank is connected with the sedimentation tank through pipelines. After the sand and gravel waste water is mixed with compressed air, it is sent to the grit chamber; after sedimentation in the grit chamber, the air lift pump sends the grit into the sand collection tank, and after being exhausted through the vent hole of the sand collection tank, it is sent to the sand and water separation tank. The supernatant of the grit chamber enters the overflow tank, and after adding flocculant, it is sent to the sedimentation tank through the pipeline; the sediment is sent to the dehydration device to make a mud cake; the supernatant of the sedimentation tank is recycled. Through the above steps, the mud and sand classification recovery treatment and water recycling of the sand and gravel processing washing wastewater are realized. The invention separates sand, mud and water, recycles sand for reuse, mud is made into mud cakes and transported outside, and water is used for recycling, with less investment in equipment, low energy consumption of the system, and remarkable environmental protection benefits.

Description

technical field [0001] The invention relates to the field of sand and gravel wastewater treatment, in particular to a system and method for treating sand and gravel processing flushing wastewater. Background technique [0002] The treatment of sand and gravel processing flushing wastewater in hydropower and water conservancy projects and other building constructions started late, and there is no unified industry standard and construction method at present, and because of the large amount of flushing wastewater and high sand content, it makes it It has become a prominent issue of environmental protection in the construction of hydropower and water conservancy projects. [0003] At present, there is no good treatment process for sand and gravel wastewater treatment at home and abroad. Many units and individuals have done a lot of discussion and research on the treatment of sand and gravel processing flushing wastewater in hydropower and water conservancy construction, and have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F11/12
Inventor 肖卓文黄万林黄金春黄远华胡方华乔雁彬鲍玉征熊建武
Owner CHINA GEZHOUBA (GRP) FIRST ENG CO LTD