CN-115688625-B - Test system and evaluation method suitable for analyzing evolution behavior of anti-clogging structure

CN115688625BCN 115688625 BCN115688625 BCN 115688625BCN-115688625-B

Abstract

The invention belongs to the technical field of solid-liquid two-phase flow tests, and provides a test system and an evaluation method suitable for analyzing the evolution behavior of an anti-clogging structure, wherein the test system comprises a model device, a gas-water separation device, a vacuumizing system and a real-time monitoring assembly; the model device is connected with the gas-water separation device through a first vacuum pipeline, the gas-water separation device is connected with the vacuumizing system through a second vacuum pipeline, a vacuum meter is arranged on the gas-water separation device, the real-time monitoring assembly comprises an intelligent real-time microscopic monitoring system, a macroscopic test system and a data analysis system, and the data analysis system processes and analyzes acquired data. The evaluation method is a macro-micro theory evaluation method for analyzing the evolution behavior of the anti-clogging structure. The invention is favorable for further developing the anti-clogging mechanism research of the filtering drainage structure, and provides scientific support for the design of the vacuum filtering anti-clogging technical scheme.

Inventors

BAO SHUFENG
YANG PENG
ZHANG JINWEN
LIU XIANGYANG
ZHOU SHUANGXI
XIE ZHIHONG
BI QILIN
HU JIYE
WANG JING
LI JIANXIN

Assignees

广州航海学院

Dates

Publication Date: 20260512
Application Date: 20221031

Claims (8)

1. The test system suitable for analyzing the evolution behavior of the anti-clogging structure is characterized by comprising a model device for loading a sample, a gas-water separation device, a vacuumizing system and a real-time monitoring assembly; the model device is connected with the gas-water separation device through a first vacuum pipeline, and the gas-water separation device is connected with the vacuumizing system through a second vacuum pipeline; The real-time monitoring assembly comprises an intelligent real-time microscopic monitoring system for tracking and monitoring microscopic structural evolution characteristics of a sample, a macroscopic test system for acquiring macroscopic physical and mechanical indexes of the sample and a data analysis system, wherein the intelligent real-time microscopic monitoring system monitors the microscopic structural evolution characteristics of the sample in the model device in an online real-time manner and transmits data obtained by monitoring to the data analysis system; the data analysis system processes and analyzes the acquired data; When the on-line real-time monitoring of the evolution behavior of the anti-clogging structure of the sample in the model device is carried out, the imaging probe stretches into the central axis position of the inner cavity of the model device according to the preset height and perpendicular to the outer wall of the model device; The macroscopic test system comprises a data automatic acquisition instrument, an interface sedimentation monitor, a pore water pressure sensor and indoor conventional geotechnical test equipment, wherein the interface sedimentation monitor and the pore water pressure sensor are electrically connected with the data automatic acquisition instrument, the data automatic acquisition instrument automatically acquires sample interface sedimentation data monitored by the sedimentation monitor and pore water pressure data at different heights in a sample detected by the pore water pressure sensor, and the indoor conventional geotechnical test equipment comprises a soil particle composition test instrument, a soil water content test instrument, a soil density test instrument and triaxial test equipment.
2. The test system for analyzing the evolution behavior of the anti-clogging structure according to claim 1, wherein the outer surface of the model device is provided with scales for observing the interface change condition of the sample in the test process in real time.
3. A macro-micro theoretical evaluation method suitable for analyzing the evolution behavior of an anti-clogging structure based on the test system suitable for analyzing the evolution behavior of an anti-clogging structure as set forth in any one of claims 1-2, characterized by comprising the steps of: S1, loading a solid-liquid two-phase flow sample into a model device, processing the solid-liquid two-phase flow sample to obtain a typical test sample, and performing a physical test on the typical test sample through a macroscopic test system to obtain physical index data of the typical test sample before sedimentation; S2, carrying out static intermittent sedimentation test on a typical test sample in the model device while carrying out the physical test of the step S1; S3, judging whether a typical test sample in the model device reaches a static intermittent sedimentation stable state according to an evaluation standard of the static intermittent sedimentation stability, and if so, performing a step S4; s4, vacuumizing the model device and the gas-water separation device through a vacuumizing system according to a preset loading plan of the grading vacuum load; in the vacuumizing process, monitoring and detecting microstructure evolution characteristics and physical indexes of a typical test sample in a model device respectively through an intelligent real-time microscopic monitoring system and a macroscopic test system to obtain real-time microstructure evolution characteristic data and real-time physical index data of the typical test sample in the hierarchical vacuumizing process; s5, after the loading plan of the grading vacuum load is completed, carrying out an indoor physical and mechanical test on the typical test sample after vacuum consolidation through a macroscopic test system, and obtaining consolidated physical and mechanical index data of the typical test sample; S6, analyzing and evaluating macro-microstructure evolution behaviors of the typical test sample according to the physical index data before sedimentation, the real-time microstructure evolution characteristic data, the real-time physical index data and the consolidation physical and mechanical index data in the step S1, the step S4 and the step S5.
4. The macro-micro theory evaluation method suitable for analyzing the evolution behavior of the anti-clogging structure according to claim 3, wherein in the step S4, the intelligent real-time micro monitoring system monitors and detects the microstructure evolution characteristics of the typical test sample in the model device, including average chord length, average porosity and average fractal dimension.
5. The macro-micro theory evaluation method suitable for analyzing the evolution behavior of the anti-clogging structure according to claim 4, wherein in the step S4, the macro test system monitors and detects physical indexes including particle composition, water content, density and consolidation degree of a typical test sample in the model device, and in addition, monitors and records the interfacial settlement value of the typical test sample in real time.
6. The macro-micro theoretical evaluation method suitable for analyzing the evolution behavior of the anti-clogging structure according to claim 5, wherein in the step S5, the consolidation physical mechanical index data of the typical test sample includes particle composition, water content, density of soil samples with different depths and triaxial test shear strength indexes including effective cohesion and effective internal friction angle.
7. The macro-micro theory evaluation method suitable for analyzing the evolution behavior of the anti-clogging structure according to claim 6, wherein in the step S6, after analyzing and evaluating the evolution behavior of the macro-micro structure of the test sample, a macro-micro theory evaluation standard of the anti-clogging structure evolution in the solid-liquid two-phase flow hierarchical vacuum consolidation process is established.
8. The macro-micro theoretical evaluation method suitable for analyzing the evolution behavior of the anti-clogging structure according to claim 7, wherein the macro-micro theoretical evaluation standard of the anti-clogging structure evolution in the solid-liquid two-phase flow fractional vacuum consolidation process is obtained by the following steps: (1) Monitoring the evolution characteristics of the microstructure in real time according to the typical test sample in the model device by the intelligent real-time microscopic monitoring system in the step S4, and obtaining Curve characteristics of time; Monitoring real-time physical indexes of a typical test sample in a model device according to the macroscopic test system in the step S4 to obtain the model device ) Curve characteristics of time; Wherein, the For the average porosity of the microstructure image during the staged evacuation, The fractal dimension of the microstructure image in the step of step vacuumizing is that S is an interface sedimentation value and U is a consolidation degree; (2) Carrying out indoor physical and mechanical test on the typical test sample after vacuum consolidation according to the macroscopic test system in the step S5 to obtain consolidation physical and mechanical index data of the typical test sample ); Wherein w is water content, c is effective cohesion, Is the effective internal friction angle; (3) According to step (1) and step (2) Curve characteristic of time [ ] ) Time curve characteristic and consolidation physical and mechanical index data ) Establishing a macro-micro theoretical evaluation standard for anti-clogging structure evolution in the solid-liquid two-phase flow fractional vacuum consolidation process, wherein the function expression is as follows 。

Description

Test system and evaluation method suitable for analyzing evolution behavior of anti-clogging structure Technical Field The invention belongs to the technical field of solid-liquid two-phase flow tests, and particularly relates to a test system and an evaluation method suitable for analyzing the evolution behavior of an anti-clogging structure. Background The graded vacuum filtering drainage technology belongs to the filtering and separating technology, and is a low-carbon environment-friendly technology with cost performance. The particle structure layer in the filtering and draining structure is gradually formed by the coarse dispersion system under the continuous action of the vacuum filtering pressure, so that the clogging mechanism and the clogging prevention mechanism of the filtering and draining structure under the action of the vacuum filtering pressure depend on the evolution behavior of the filtering and draining structure. However, researches on the technical aspect of graded vacuum filtration drainage are focused on the macro-analysis level of the filtration drainage effect, and macro-micro comprehensive analysis is not performed on the evolution mechanism and mechanical behavior of the anti-clogging structure of the filtration drainage aiming at the characteristics of the graded vacuum filtration drainage technology. Therefore, it is necessary to provide a macro-micro system and a method suitable for analyzing the evolution behavior of the filtering drainage anti-clogging structure, and the research of the macro-micro mechanism of the evolution of the graded vacuum filtering drainage anti-clogging structure is further developed from the macro-micro aspect, so that theoretical support is provided for the vacuum filtering anti-clogging technology. Disclosure of Invention In order to overcome the defects in the prior art, the invention aims to provide a test system suitable for analyzing the evolution behavior of a clogging prevention structure, thereby being beneficial to further developing the clogging prevention mechanism of a filtering drainage structure and providing theoretical support for the vacuum filtering clogging prevention technology. The invention further aims to provide a macro-micro theory evaluation method suitable for analyzing the evolution behavior of the anti-clogging structure. The technical scheme adopted for solving the technical problems is as follows: The test system suitable for analyzing the evolution behavior of the anti-clogging structure comprises a model device for loading a sample, a gas-water separation device, a vacuumizing system and a real-time monitoring assembly; the model device is connected with the gas-water separation device through a first vacuum pipeline, and the gas-water separation device is connected with the vacuumizing system through a second vacuum pipeline; The real-time monitoring assembly comprises an intelligent real-time microscopic monitoring system for tracking and monitoring microscopic structural evolution characteristics of a sample, a macroscopic test system for acquiring macroscopic physical and mechanical indexes of the sample and a data analysis system, wherein the intelligent real-time microscopic monitoring system monitors the microscopic structural evolution characteristics of the sample in the model device in an online real-time manner and transmits data obtained by monitoring to the data analysis system; the data analysis system processes and analyzes the acquired data. Preferably, the intelligent real-time microscopic monitoring system comprises a host, an imaging probe and a matched software system, wherein when the on-line real-time monitoring is carried out on the evolution behavior of the anti-clogging structure of the sample in the model device, the imaging probe stretches into the central axis position of the inner cavity of the model device according to the preset height and perpendicular to the outer wall of the model device. Preferably, the macroscopic test system comprises a data automatic acquisition instrument, an interface sedimentation monitor, a pore water pressure sensor and indoor conventional geotechnical test equipment, wherein the interface sedimentation monitor and the pore water pressure sensor are electrically connected with the data automatic acquisition instrument, the data automatic acquisition instrument automatically acquires sample interface sedimentation data monitored by the sedimentation monitor and pore water pressure data at different heights in a sample detected by the pore water pressure sensor, and the indoor conventional geotechnical test equipment comprises a soil particle composition test instrument, a soil water content test instrument, a soil density test instrument and triaxial test equipment. Preferably, the outer surface of the model device is provided with scales for observing the interface change condition of the sample in the test process in real time. The macro-micro theory evalu