Turbulence condition low concentration sludge settlement rate measuring method and the measuring device

Abstract

The invention provides a method and device for measuring the low concentration sludge settling rate at turbulent motion. The image of sludge is processed to obtain sludge measuring data. The image acquiring device is connected with the measuring computer by the data line. The measuring computer comprises: an image acquiring module, an image processing module and an image measuring module. The image measuring module operates based on the acquired data from the image processing module to obtain the data of the tested sludge and comprises a sludge grain size measuring sub-module for calculating the average diameter of the sludge image based on the acquired sludge image from the image processing module to calculate the real average diameter of the sludge image based on the scaling proportion; a sludge settling rate measuring sub-module for calculating the rate of the sludge on the image based on the two frame image obtained from the processing module and calculating the real sludge settling rate based on the scaling proportion. The invention has features: high precision of measuring result, quick measurment, easy usage and automatization.

Description

technical field [0001] The invention relates to a method and device for measuring the sedimentation rate of low-concentration sludge under turbulent conditions, in particular to a device and method for obtaining sludge measurement data by processing sludge images, which are used for various sludge sedimentation rates As well as shape and size testing, daily monitoring of sludge settling performance in sewage treatment plants, laboratory research on hydrodynamics of sludge settling process, and evaluation and early warning of local sludge deposition in various water treatment reactors. Background technique [0002] At present, sedimentation can be mainly divided into coagulation sedimentation, free sedimentation, flocculation sedimentation and regional sedimentation. Under static water conditions, the coagulation sedimentation test draws the relationship between turbidity and dosage, and calculates the velocity gradient G and GT during the slow stirring process of the water s...

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Problems solved by technology

Due to the fact that all kinds of settlements need to be studied by drawing settlement curves through experiments, and the settlement velocity can be obtained indirectly from the relevant parameters obtained, it is impossible to directly obtain the sludge shape, size and movement information during the settlement process, and the test process is complicated in actual application. , which reduces the test accuracy, and also wastes a lot of manpower and time; moreover, the research on the above-mentioned various types of sediments under dynamic water conditions has not yet formed a recognized test method, and the methods that have emerged are also based on various types of sedimentation under static water conditions. curve correction

[0003] In the production process, people use the image of the object to be obtained, and then process the image of the object to obtain the measurement data of the object, which can greatly improve the measurement efficiency, such as Chinese patent ZL02139916.6, that is, the size of the object is measured by the image method, however , the system is only suitable for measuring the size of macroscopic objects, and cannot measure small objects like sludge

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