Mechanical compressed dehydration tester of slurry

Abstract

The invention discloses a mechanical compressed dehydration tester of slurry, and belongs to the technical field environment geotechnical engineering. The tester comprises a charging cylinder, a high-pressure dehydration cylinder, a pressure relief cylinder and a servo loading system; the charging cylinder loads the slurry for test, and conveys the slurry to a text technical segment in a pressurization way; the high-pressure dehydration cylinder is connected to the charging cylinder, receives the slurry and carries out high-pressure dehydration; the pressure relief cylinder is connected with the high-pressure dehydration cylinder, receives a filtrate, and relieves the pressure to normal pressure for standby; the servo loading system is connected with the high-pressure dehydration cylinder,drives motion of the high-pressure dehydration cylinder, and thus realizes high-pressure filtering; and the charging cylinder comprises a cylinder body, a cylinder bottom, a cylinder cover and a first piston, the lower end of the cylinder body is fixed to the cylinder bottom, the cylinder cover is fixed in the top end of the cylinder body, and an enclosed inner cavity of the cylinder body is formed; the first piston abuts against the inner wall of the cylinder body cooperatively, and the inner cavity of the cylinder body is divided into an upper gas driving cavity and a lower slurry conveyingcavity; and the cylinder cover is provided with an air source inlet for connecting a driving air source, and the cylinder bottom is provided with a discharging port through which the slurry is discharged.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a mud mechanical compression dehydration test device. Background technique [0002] With the trend of social urbanization in our country, the generation of urban sewage and waste water continues to increase, and the amount of sludge produced every year is increasing. The safe disposal of municipal mud is facing huge technical and market demands in the project. Municipal sludge has high The characteristics of hydrophilicity, high water content, high organic matter and low permeability make its engineering disposal difficult. The municipal sludge deep dehydration process is a key link in sludge disposal. [0003] In recent years, the dehydration process combining chemical conditioning and mechanical extrusion dehydration has attracted more and more attention, and it has been widely used due to its advantages of low energy consumption, low investment cost, fast proc...

AI Technical Summary

Problems solved by technology

Engineers often directly use the pilot test or factory-scale dehydration equipment to test the best chemical conditioning scheme, but the pilot test or factory-scale test requires a large amount of samples, consumes a lot of chemical conditioning agents at one time, and is inconvenient to operate, resulting in high test costs.

More importantly, whether it is a rapid test index, or a pilot test or factory-scale test, all obtained are empirical relationships, and there is a lack of evaluation indicators that characterize the mechanism of compression dehydration.

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