Simple method for retarding densification of float sludge in sludgeharbor

A silt, floating mud technology, applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of heavy vertical increase of floating mud, difficulty in normal navigation of ships, and loss of navigability. and other problems, to achieve the effect of reducing the frequency of dredging, low price, and saving manpower and material resources

Inactive Publication Date: 2017-05-31
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(2) Plastic layer: the layer of floating mud has a large vertical increase, and gradually transitions downward to a dense silt layer, gradually losing navigability
There are a lot of muddy seaports in our country, some of which have serious silt silting, which brings difficulties to the normal navigation of ships. Regular dredging work is required, which brings great economic pressure to port enterprises.

Method used

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  • Simple method for retarding densification of float sludge in sludgeharbor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A simple method for delaying the compaction of floating mud in silty ports, the specific steps are as follows:

[0020] Add methanol to the floating mud with a density of 1050g / L in a ratio of 12% (V / V), place the mixture of floating mud and methanol in a 500ml Erlenmeyer flask, and mix with an air shaker (rotating speed is 180r / min) 5 Two days later, take the floating mud sample and put it in a 100mL measuring cylinder, record the change trend of the sediment volume over time, and observe the effect of delaying the compaction of the floating mud.

[0021] Control group: Weigh the floating mud sample and dilute it with water to make the final density 1050g / L, and shake it with an air shaker (180r / min, 2h). Take the floating mud sample and put it in a 100mL measuring cylinder, record the change trend of the sediment volume over time, and observe the effect of delaying the compaction of the floating mud.

Embodiment 2

[0023] A simple method for delaying the compaction of floating mud in silty ports, the specific steps are as follows:

[0024] Add methanol to the floating mud with a density of 1050g / L at a ratio of 4% (V / V), place the mixture of floating mud and methanol in a 500ml Erlenmeyer flask, and mix with an air shaker (rotating speed is 180r / min) 2 sky. Add methanol in the floating mud again in a ratio of 4% (V / V), continue to mix (rotating speed is 180r / min) for 2 days, then add methanol in the floating mud in a ratio of 4% (V / V), Continue to mix (rotating at 180r / min) for 1 day, take a sample of the floating mud and place it in a 100mL measuring cylinder, record the trend of the sediment volume over time, and observe the effect of delaying the compaction of the floating mud.

[0025] Control group: with embodiment 1.

Embodiment 3

[0027] A simple method for delaying the compaction of floating mud in silty ports, the specific steps are as follows:

[0028] Add a mixture of methanol and formic acid to the floating mud with a density of 1050g / L at a ratio of 12% (V / V), and the volume ratio of methanol to formic acid is 1:1. The mixture of floating mud, methanol and formic acid is placed in a 500ml Erlenmeyer flask, and after 5 days of mixing with an air shaker (rotating speed is 180r / min), the floating mud sample is taken and placed in a 100mL graduated cylinder, and the trend of sediment volume over time is recorded. Observe the effect of delaying the compaction of floating mud.

[0029] Control group: with embodiment 1.

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Abstract

The invention relates to a simple method for retarding densification of float sludge in a sludge harbor. The method comprises the steps that a carbon compound is added to the float sludge; then uniform mixing is performed for at least 5 days. Therefore, the densification speed of the float sludge can be significantly slowed. A material applied by the method is low in price and easy to obtain; operation is simple; a complicated procedure is not required; the densification speed of the float sludge can be reduced to be less than 1 / 2 of the original densification speed; the frequency of harbor desilting is significantly reduced; manpower and material resources are greatly saved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for reducing the dredging frequency of muddy ports, in particular to a simple method for delaying the compaction of floating mud in muddy ports. Background technique [0002] Floating mud is a unique sediment phenomenon in muddy estuaries and coastal areas, that is, high-concentration muddy water formed by sediment flocculation and settlement on the bed surface. Generally speaking, only the median particle size D of estuary and coastal sediments 50 When <0.01mm, floating mud may appear. The floating mud layer refers to the mud-water mixed layer between the high-frequency lower interface and the low-frequency lower interface obtained by dual-frequency sounding, and can be divided into two sublayers: (1) Pseudoplastic layer: vertically, the floating mud layer The severe increase is small and has fluidity. The nature of the floating mud is similar to wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
CPCC02F11/00
Inventor 韩培培陈晓华李梦楠贾士儒庞启秀谭之磊钟成
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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