Device and method for accurately calculating floc strength based on laminar flow condition

A precise and floc technology, applied in the direction of applying stable shear force to test the strength of materials, measuring devices, strength characteristics, etc., can solve the problems of complex devices and achieve the effect of simple and portable test devices

Pending Publication Date: 2022-07-05
LANZHOU JIAOTONG UNIV
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Problems solved by technology

There are other reports in the literature that use capillary force to stretch and deform a single floc to destroy it, and then obtain the floc strength value by testing the capillary force, but this method is complex and only suitable for testing particles with a particle size smaller than the capillary floc strength

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  • Device and method for accurately calculating floc strength based on laminar flow condition
  • Device and method for accurately calculating floc strength based on laminar flow condition

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

[0026] like figure 1 As shown in the figure, a device for accurate calculation of floc strength based on laminar flow conditions includes an inner cylinder 1 and an outer cylinder 2 that are coaxially arranged, and there is a gap b between the inner cylinder 1 and the outer cylinder 2; the outer cylinder 1 and the outer cylinder 2 have a gap b; The cylinder 2 and the horizontal base 9 are connected in the form of flanges through the outer cylinder base 3; a screw 5 is installed in the ...

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Abstract

The invention discloses a device for accurately calculating floc strength based on a laminar flow condition. The device comprises an inner cylinder and an outer cylinder which are coaxially arranged, a gap b is formed between the inner cylinder and the outer cylinder; the outer cylinder is connected with the horizontal base through the outer cylinder base in a flange form; a screw is installed in the center of the inner cylinder, one end of the screw is installed on the outer cylinder base through a bearing, the other end of the screw is in transmission connection with a motor, and the motor is installed on the horizontal base through a motor fixing support. And the motor is connected with a motor controller through a cable. The method for calculating the strength of the floc mainly utilizes the principle that under the laminar flow condition, when the viscous shear force F of fluid is equivalent to the viscous force B of the floc, the floc is damaged, and the shear force borne by the floc is calculated through the Newton internal friction law, so that the strength of the floc is obtained. The method is simple and convenient in testing means and relatively accurate in calculation result, and can be used for quantitatively testing the strength of the floc.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a device and method for accurately calculating floc strength. Background technique [0002] Coagulation is a common process in water treatment, mainly used to remove colloids and some turbid particles in water. At present, the evaluation indicators for coagulation effect include effluent quality and floc morphology evaluation indicators. Among them, the evaluation indexes of flocs mainly focus on the evaluation of parameters such as particle size and fractal dimension, and there are few reports on the strength detection of flocs. [0003] The floc strength test reported so far mainly relies on the crushing of the floc under the condition of mechanical stirring, and then the particle size of the floc itself before and after the floc is analyzed, and the crushing factor of the floc is obtained according to the ratio of the particle size before and after the crushi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N3/04G01N15/02
CPCG01N3/24G01N3/04G01N15/0227G01N2203/0025
Inventor 丁昀杨庆赵俊光明金洋马乐郭文婧何宗飞
Owner LANZHOU JIAOTONG UNIV
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