Preloading type sludge solidification compression tester

Abstract

The invention belongs to the technical field of Geoenvironmental Engineering and in particular relates to a preloading type sludge solidification compression tester. The tester is composed of a pressurizing weight, a compression container, a pressure piston, geotextile, a connecting pipe, a percolate collector, a plastic drain bar, a tray, a displacement meter and a peristaltic pump; wherein, the pressure piston is composed of an upright post, an upper tray and a lower compact disk which are connected sequentially; the compression container is arranged above the tray, the bottom part and the lateral wall thereof are both provided with drain holes; the top part, the bottom part and the lateral wall in the compression container are all coated with the geotextile; the geotextile at the top part is below the compression disk; the compression container is inserted with the drain bar, the displacement meter is composed of a magnetic seat and a testing meter, the magnetic seat is fixed on the compression container, the testing meter is above the lower compression disk; the lateral wall of the tray is provided with drain holes; one end of the connecting pipe is connected with the drain holes at the lateral wall of the tray, the other end thereof is connected with the percolate collector; the peristaltic pump is arranged at the top part of the lateral wall of the compression container, a suction pipe is arranged above the lower compression disk and the drain bar is arranged above the tray. The invention has multiple drain routes of large size, part of the components are subjected to preservative treatment, thus solving problems with the testing of solidification and compression characteristic of sludge by the existing device and being capable of reasonably evaluating the solidification and compression characteristic of the sludge.

Description

technical field [0001] The invention belongs to the technical field of environmental geotechnical engineering, and in particular relates to a heap-type sludge solidification compression tester. Background technique [0002] Sludge mainly comes from industrial wastewater treatment, waterworks and domestic sewage plants, etc. It has high water content and high organic matter content, and may contain chemical toxic and harmful substances, biological bacteria, pathogenic bacteria, etc. According to different reasons, the sludge components are If the sludge is discharged directly without treatment, it will cause serious harm to the environment. At present, the treatment methods of sludge are mainly landfill and incineration. For landfill treatment, solidification and dehydration of sludge can increase the landfill capacity; for incineration treatment, solidification and dehydration of sludge can provide more heat value. Whether landfill or incineration is used, solidification a...

AI Technical Summary

Problems solved by technology

Due to the high water content of sludge and a large amount of organic matter, the current traditional geotechnical compression instrument only has upper and lower permeable surfaces that can permeate water, has few drainage paths, and the sample size is small, so the effect of sludge solidification compression test is poor.

The corrosiveness of sludge also requires the instrument to have a certain corrosion resistance, which cannot be satisfied by traditional geotechnical compression instruments.

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