Long distance conveying and drag reducing method for sludge

A long-distance and silt technology, which is applied in the direction of earth mover/shovel, construction, etc., can solve the problems that silt is not suitable for long-distance transportation, the transportation distance is limited, and the water head loss is large, so as to achieve low equipment cost and protect the environment , The effect of small head loss

Inactive Publication Date: 2006-03-01
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

The main disadvantages of this invention are: 1) the concentration of the slurry is in the range of 25%-50%, and the concentration of the slurry that can be transported is relatively low; 2) the longest transport distance is only 15000 meters, and the transport distance is limited; 3 ) The outlet pressure of the high-pressure piston pump is not lower than 6MPa, the head loss along the long-distance transportation is large, the energy consumption is high, and it is uneconomical; therefore, this invention is not suitable for long-distance transportation of silt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] (1) Install a high-frequency micro-amplitude vibration device at the inlet section of the pipeline, and apply high-frequency micro-amplitude vibration to the sludge with a vibration frequency of 12,000 times per minute to liquefy it into a liquid uniform mud with good fluidity, and then use a mud pump Then carry out pipeline transportation, the concentration of liquid uniform mud is 65%;

[0011] (2) After the liquid uniform mud is transported for 5 kilometers, a high-frequency micro-amplitude vibration device is set to apply high-frequency micro-amplitude vibration to the transported mud again, and the vibration frequency is 12000 times / minute. Under the high-frequency micro-amplitude vibration, the transported mud The silt is further liquefied into a liquid uniform mud with good fluidity, and then continues to be transported by pipeline;

[0012] (3) After the liquid uniform mud is transported for 10 kilometers, a high-frequency micro-amplitude vibration device is set...

Embodiment 2

[0016] (1) Install a high-frequency micro-amplitude vibration device at the inlet section of the pipeline, and apply high-frequency micro-amplitude vibration to the sludge with a vibration frequency of 12,000 times per minute to liquefy it into a liquid uniform mud with good fluidity, and then use a high-pressure piston The pump transports the mud to the pipeline, and the concentration of the liquid uniform mud is 40%;

[0017] (2) After the liquid uniform mud is transported for 8 kilometers, a high-frequency micro-amplitude vibration device is set to apply high-frequency micro-amplitude vibration to the transported mud again, and the vibration frequency is 12000 times / minute. Under the high-frequency micro-amplitude vibration, the transported mud The silt is further liquefied into a liquid uniform mud with good fluidity, and then continues to be transported by pipeline;

[0018] (3) After the liquid uniform mud is transported for 16 kilometers, a high-frequency micro-amplitud...

Embodiment 3

[0024] (1) Since the water content of the silt is lower than 30%, and field silt irrigation is required, before applying high-frequency micro-amplitude vibration to the silt, water injection equipment should be added to inject water into the silt, and then stirred by a mixer to make the silt Emission concentration is less than 10%;

[0025] (2) Install a high-frequency micro-amplitude vibration device at the inlet section of the pipeline, and apply high-frequency micro-amplitude vibration to the sludge with a vibration frequency of 12,000 times per minute to liquefy it into a liquid uniform mud with good fluidity, and then use a high-pressure piston The pump transports the mud to the pipeline;

[0026] (3) After the liquid uniform mud is transported for 8 kilometers, a high-frequency micro-amplitude vibration device is set to apply high-frequency micro-amplitude vibration to the transported mud again, and the vibration frequency is 12,000 times per minute. Under the high-frequ...

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Abstract

The present invention belongs to the field of water conservancy engineering technology, and is long distance conveying and drag reducing method for sludge. Before sludge is conveyed for long distance, it is high frequency micro amplitude vibrated with the high frequency micro amplitude vibration source set in the pipeline inlet section to become fluidized slurry with high flowability. During the conveyance of slurry, it is high frequency micro amplitude vibrated with the high frequency micro amplitude vibration sources to ensure the homogeneity and flowability of the slurry and small conveying drag. The present invention is simple and has less water head loss of the conveyed sludge, less blocking of pipeline, low power consumption and high efficiency. The present invention may be used widely.

Description

technical field [0001] The invention relates to a method in the technical field of water conservancy engineering, in particular to a method for long-distance transport and drag reduction of silt. Background technique [0002] The siltation of reservoirs in our country is becoming more and more serious, which not only directly reduces the benefits of hydropower generation, but also reduces flood control standards. Reservoir silt is transported through pipelines and discharged outside the reservoir, which is a common method for reservoir dredging. However, due to the high viscosity of silt, the long-distance transport of silt has a large head loss along the way, high energy consumption, and pipeline blockage is prone to occur, so long-distance transport of silt is often difficult to implement. Therefore, new methods must be found for long-distance transportation of sludge. [0003] After searching the prior art documents, it is found that the Chinese patent application numbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F7/10
Inventor 喻国良
Owner SHANGHAI JIAO TONG UNIV
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